CN1634691B - Pipeline Mixing Device - Google Patents

Abstract

A pipeline type mixing device comprises a mixing pipeline having an upstream supply portion for supplying a first fluid material under pressure and a downstream discharge portion for discharging the mixture, an axis member coaxially supported in the mixing pipeline, a spiral blade and a stirring blade arranged in sequence and in parallel on the outer surface of the axis member from the upstream side, a rotary drive device for the axis member, and a supply port for a second fluid material arranged at a position of the axis member corresponding to the stirring blade; characterized in that: after the first fluid material supplied to the mixing pipeline is rectified by the rotary driven spiral blade, the second fluid material is supplied to the first fluid material from the supply port of the axis member, the first fluid material and the second fluid material are stirred and mixed by the rotary driven stirring blade, and the stirred mixture is discharged through the discharge portion, and a cover member is provided on the front side of the rotation direction of the axis member of the second fluid material supply port of the axis member, and the cover member pushes the stirring material away as the axis member rotates, thereby forming a supply space for the second fluid material at the position of the second fluid material supply port.

Description

Pipeline type mixing device

technical field

The invention relates to a pipeline type mixing device and a manufacturing method of light soil material. the

Background technique

For example, the dredged soil produced in dredging works generally has a high water content, and even if it is discarded to a disposal site, it takes a long time for the soil to form sufficient strength as a foundation. In view of this problem, the inventors of the present invention have previously proposed various processing methods of continuously mixing the soil and the curing agent in the transport pipe. Specifically, the methods disclosed in JP-A-59-179197, JP-A-3-77893, JP-A-9-158245, and JP-A-2000-54428 correspond to this. Moreover, the apparatus disclosed in Unexamined-Japanese-Patent No. 2001-79827 is proposed about the in-line type mixer (in-line mixing apparatus) used for this. the

However, there are the following problems in the above-mentioned prior art examples. the

(A) In view of the decrease in disposal sites in recent years, it is desired to reuse water-containing fluid waste such as the above-mentioned dredged soil, but when only a solidifying agent is added as in the above-mentioned prior art example, the functionality or added value is poor, It is difficult to apply in the advanced civil technology in recent years. the

(B) The above-mentioned prior art example is a continuous curing agent addition process performed by a pipeline type mixer. However, the pipeline type mixer of the above-mentioned prior art example still has a problem in the stability of the mixing ratio. the

(C) In the curing agent addition process like the above-mentioned prior art example, although it is also possible to directly add the solidifying agent such as cement to the soil, etc., it is also possible to mix it with a liquid such as water in advance to make cement slurry, etc. agent, add it to soil etc. However, especially in the latter case, it is necessary to continuously supply a large amount of curing agent in order to perform a large amount of treatment such as dredging soil treatment. the

However, since the curing agent solidifies with time, it is not effective to make and place it. Therefore, it is desirable to continuously manufacture and supply the curing agent. In this case, of course, it is desirable to continuously merge the powdery solidifying agent and the liquid. the

However, in the case where the powder and granular curing agent and the liquid are continuously combined, the powder and granular curing agent is easy to adhere to moisture and solidify, and there is a risk that the curing agent will adhere to the channel or the inner surface of the container and cause blockage. ,very difficult. the

(D) When a solidifying agent is added to water-containing waste such as soil, it controls the solidification characteristics according to the combination. For this reason, in prior art examples, it is proposed to adjust the specific gravity of soil by adding water. However, adding water alone cannot cope with high water ratios. For this reason, it is desired to obtain a technique capable of reliably adjusting the specific gravity of a hydrated substance having a wide range of water content ratios. the

Contents of the invention

Therefore, the main subject of the present invention is to provide effective technology for recycling water-containing fluid waste and the like. Another subject is to provide an in-line mixer capable of mixing at a stable ratio. Another object is to provide a curing agent supply device capable of producing a homogeneous light soil material from soil or muddy water. Yet another object is to provide a specific gravity adjusting device that can reliably adjust the specific gravity of hydrated matter having a wide range of water content ratios. the

(Invention No. 1)

The manufacturing method of the lightweight solidified material of the present invention uses a pipeline type mixer to transfer the fluid raw material containing moisture and solid content to the delivery point while changing it into a lightweight solidified material; the pipeline type mixer has a mixing line , a shaft member coaxially supported in the mixing pipeline, a helical blade and a stirring blade arranged side by side from the upstream side on the outside of the shaft member, a rotary drive device for the shaft member, and a stirring blade provided on the shaft member At least one additive supply port at the corresponding position, after the fluid material supplied into the mixing line is transferred to the side of the additive supply port through the spiral blade driven by rotation, the additive is supplied to the fluid material from the above-mentioned additive supply port, These flowing materials and additives are stirred and mixed by stirring blades driven by rotation; characterized in that: containing

(A) The process of adjusting the specific gravity of the above-mentioned fluid raw materials by adding or removing moisture;

(B) continuously transfer the above-mentioned fluidity raw material whose specific gravity has been adjusted through a transfer channel constituted by at least one pipeline type mixer, and at the same time,

(B1) A curing agent adding process of adding and mixing a curing agent as an additive with respect to the fluidity raw material in the above-mentioned transfer process by a pipeline-type mixer arranged on the way of the above-mentioned transfer channel;

(B2) Add and mix a lightening agent as an additive to the fluid raw material to which the above-mentioned curing agent is added by another pipeline-type mixer located downstream of the pipeline-type mixer in the above-mentioned curing agent addition process, or from The curing agent adding step is a step of supplying a lightweighting agent from a separate additive supply port of the line type mixer, and adding and mixing the lightweighting agent to the fluid raw material to which the curing agent is added. the

(Effect)

According to this manufacturing method, fluid raw materials (soil or muddy water generated at construction sites, etc.) containing moisture and solid components can be smoothly made into lightweight solidified materials on site and during pipeline transportation thereof. It should be particularly noted that although it is difficult to uniformly mix lightweight agents such as air bubbles and foam beads with high-water-containing flowing materials such as soil, when passing through a narrow and slender When the material flowing in the space is stirred and mixed while being supplied with the lightweighting agent from the supply port that rotates with the shaft member, it was confirmed that the material can be mixed much more uniformly than originally expected. the

(No. 2 invention)

The manufacturing method of the lightweight solidified material according to the first invention, wherein: a pressure pump is provided on the upstream side of the pipeline type mixer for adding the curing agent in the above-mentioned transfer channel, and the pressure of the pressure pump is used to make the Addition and mixing of the additives are performed while the above-mentioned fluid raw material whose specific gravity has been adjusted passes through the pipeline mixer. the

(Effect)

In this way, a very simple and energy-saving system can be constituted by utilizing the pumping pressure of the pump for transferring the flowing material to pass through the stirring and mixing position of the in-line mixer. These configurations and advantages are, of course, the configurations and advantages obtained by adopting the principle of the in-line mixer described later. the

(No. 3 invention)

The manufacturing apparatus of the lightweight solidified material of the present invention uses a pipeline type mixer to transfer the fluid raw material containing moisture and solid content to a delivery point while changing it into a lightweight solidified material; the pipeline type mixer has a mixing line , a shaft member coaxially supported in the mixing pipeline, a helical blade and a stirring blade arranged side by side from the upstream side on the outside of the shaft member, a rotary drive device for the shaft member, and a stirring blade provided on the shaft member At least one additive supply port at the corresponding location transfers the fluid material supplied into the mixing line to the side of the additive supply port via the spiral blade driven by rotation, and then supplies the additive to the fluid material from the additive supply port. , these flowing materials and additives are stirred and mixed by the stirring blade driven by rotation; it is characterized in that: it is composed of:

(a) Adjust the specific gravity of the above-mentioned fluid raw materials by adding or removing moisture;

(b) continuously transfer the above-mentioned fluidity raw material whose specific gravity has been adjusted through a transfer channel composed of at least one pipeline type mixer, and at the same time,

(b1) add and mix curing agent as an additive with respect to the fluid raw materials in the above-mentioned transfer process by a pipeline type mixer located on the way of the above-mentioned transfer channel;

(b2) Adding and mixing a lightening agent as an additive to the fluid raw material to which the curing agent is added is added and mixed from another pipeline mixer located downstream of the pipeline mixer in the curing agent adding step, or from The other additive supply port of the pipeline type mixer in the curing agent addition step supplies a lightweight agent, and adds and mixes the lightweight agent to the fluid raw material to which the curing agent is added. the

(Effect)

The same effect as that of the first invention can be obtained. the

(Invention No. 4)

The pipeline type mixing device of the present invention includes a mixing pipeline having an upstream side supply part for pressure-feeding the first flow material and a downstream side discharge part for discharging the mixture, a shaft member coaxially supported in the mixing pipeline, and On the outer surface of the shaft member, the helical blade and the stirring blade arranged side by side in sequence from the upstream side, the rotary drive device of the shaft member, and the supply port of the second flow material provided at the position corresponding to the stirring blade of the above-mentioned shaft member; it is characterized in that : After rectifying the first flow material supplied into the mixing pipe by the spiral blade driven by rotation, the second flow material is supplied to the first flow material from the supply port of the above-mentioned shaft member, and the agitation by the rotation drive The blade stirs and mixes the first flowable material and the second flowable material, and the stirred mixture is discharged through the discharge unit. the

(Effect)

The pipeline type mixing device of the present invention takes into account the pulsation (quantity variation over time) of the first flow material. This corresponds to the case where the first fluid material is supplied by a piston pump or the like. In such a case where the first fluid material is supplied by pressure feeding with pulsation, when it is directly mixed with the second fluid material, the mixing ratio cannot be stabilized. This point of view is completely absent in the above-mentioned prior art examples. the

However, in the device of the present invention, the first flow material is rectified by the helical blades, and then mixed with the second flow material after becoming a substantially continuous constant flow. That is, when the material is conveyed by the helical blade, even if the material supply amount on the entry side fluctuates, the fluctuation is canceled out by the quantitative pushing action of the helical blade, and has almost no influence on the exit side. The present invention utilizes this point to eliminate the pulsation of the first flowing material. Therefore, in the present invention, the mixing of the first and second fluid materials can be performed at a stable ratio. the

Although the provision of the helical blades is also disclosed in the above-mentioned prior art example, such a rectification effect cannot be exerted only by the provision of the helical blades. Since the specific method for exerting the rectification function of the present invention is considered in various ways corresponding to the supply form of the first flowing material, it cannot be generalized, but the following fifth invention is proposed as a typical example. the

(No. 5 invention)

The pipeline type mixing device according to the fourth invention, wherein the adjustable amount per unit time obtained by the spiral blade is not less than the supply amount per unit time of the first flowing material. the

(Effect)

When pressure feeding is used to supply the first flow material into the mixing line, the flow rate of the first flow material such as the adjustable amount obtained by exceeding the helical blade (that is, the influence of the pulsation on the supply side can be fully offset by the helical blade) The first flowable material is supplied in an amount) and the excess amount is the fluctuation amount of the mixing ratio. Therefore, as in the second invention, it is preferable that the adjustable amount per unit time obtained by the screw blade is not smaller than the supply amount per unit time of the first flowing material. the

(Invention No. 6)

The pipeline type mixing device according to claim 4, wherein: a mixing pipeline having an upstream side supply part for supplying the first flowing material in a non-pressurized state and a downstream side discharge part for discharging the mixture is coaxially supported The shaft member in the mixing pipeline, the helical blade and the stirring blade arranged side by side on the outer surface of the shaft member in sequence from the upstream side, the rotary drive device of the shaft member, and the first part of the shaft member corresponding to the stirring blade are provided. 2. A supply port for the flowing material; wherein: the above-mentioned helical blade transfers and discharges the first flowing material supplied into the above-mentioned mixing pipeline to the above-mentioned discharge part by its pushing action; the pushing amount per unit time produced by the helical blade is not less than the first More than the supply amount per unit time of the flowing material. the

(Effect)

The present invention is not limited to a form in which the first fluid material is supplied by pressure feeding into the mixing line, but also a form in which the first fluid material is supplied in a non-pressure-feeding state is targeted. For example, it is equivalent to the case where the flowing material is separated from the hopper and dropped into the mixing line. In this case, when the push-out amount per unit time obtained by the screw blade is less than the supply amount per unit time of the first flow material, the first flow material supplied is stably and reliably sent to the downstream side part of the screw blade, and cannot This portion is filled with the first flowable material, the second flowable material, and their mixture, and it is difficult to mix them at a stable ratio. the

However, according to the sixth invention, the push-out amount per unit time produced by the screw blade is more than the supply amount per unit time of the first flow material, so that the first flow material supplied can be stably and reliably sent to the screw. The downstream part of the blade can fill the downstream part of the helical blade with the first flow material, the second flow material and their mixture, and can mix at a stable ratio. the

(Invention No. 7)

The pipeline type mixing device according to any one of the fourth to sixth inventions, wherein a supply port for the first flowing material is provided at a portion of the shaft member corresponding to the upstream side supply unit. the

(Effect)

In this case, the first fluid material is supplied in rotation as the shaft member rotates. Therefore, since the first flow material can be distributed and supplied to the pipeline, even if the flow straightening ability of the screw blade is reduced, a sufficient straightening effect can be exhibited. the

(No. 8 invention)

The pipeline-type mixing device according to claim 6, wherein a hopper is connected to the upstream side supply part of the above-mentioned mixing pipeline, and the first flowing material stored in the hopper is divided and supplied to the above-mentioned upstream side supply by a quantitative feeder. department. the

(Effect)

In the pipeline type mixing device of the present invention, it is also possible to adopt a mode in which the first flow material is supplied from the hopper in this way. the

(No. 9 invention)

The pipeline type mixing device according to any one of the 4th to 8th inventions, wherein a part or all of the downstream side of the mixing blade of the mixing pipeline is located above the part corresponding to the spiral blade and the mixing blade, Thereby, the first flow material, the second flow material, and the mixture thereof are always filled with at least the downstream side portion of the screw blade. the

(Effect)

By adopting this configuration, the feeding resistance of the stirred mixture is increased, and at least the downstream side portion of the screw blade is always filled with the first flow material, the second flow material, and the mixture thereof, and reliable and sufficient mixing can be performed. the

(Invention No. 10)

The pipeline type mixing device according to claim 4, wherein a booster screw blade for promoting delivery of the mixture toward the downstream discharge portion is provided downstream of the stirring blade of the shaft member. the

(Effect)

By providing the booster screw blade, even if the force of the first flow material supplied by pressure feeding decreases when passing through the screw blade, the delivery of the stirred mixture can be carried out smoothly. Especially in the case where the downstream pipeline of the mixing part is long and the pipeline resistance is large, or it is deliberately made to have delivery resistance as described in the ninth invention, when such a booster screw blade is provided, the push-out can be increased. It is ideal for reducing the risk of pipeline occlusion. the

(Invention No. 11)

The pipeline type mixing device according to any one of the fourth to tenth inventions, wherein a cover member is provided on the front side of the second fluid material supply port of the above-mentioned shaft member in the direction of rotation of the shaft member, and the cover member follows the The shaft member rotates to push the agitator apart, thereby forming a supply space for the second fluid material at the position of the second fluid material supply port. the

(Effect)

According to this configuration, the second fluid material can be distributed and supplied to the first fluid material smoothly and reliably. Of course, this form is suitable especially when the first flowing material is in a pressure-fed state. the

(Invention No. 12)

The pipeline-type mixing device according to any one of the 4th to 11th inventions, wherein: as the above-mentioned stirring blades, there are multifunctional blades having a stirring function and a mixing object transfer function and a single-function blade having only a stirring function, and they are along the The helical direction centered on the above-mentioned shaft member is set in an alternate arrangement in which one single-function blade intervenes in every other one or two multi-function blades. the

(Effect)

As a stirring blade, if only a multi-functional blade having a stirring function and a mixing object transfer function is provided, the transfer function is dominant as a whole, and the transfer function takes priority over stirring, and high mixing performance cannot be obtained. On the other hand, when a single-function blade having only a stirring function is installed, the transfer efficiency is lowered, and as a result, the continuous mixing property is impaired. For this reason, as described above, by adopting an alternate arrangement in which one or two sheets of the former intervenes with one sheet of the latter, mixing properties can be improved without impairing transfer characteristics. This has been confirmed experimentally. the

(No. 13 Invention)

The pipeline type mixing device according to any one of the fourth to twelfth inventions, wherein the agitating blades are elongated flat plates spaced at phase intervals of 90 degrees or 60 degrees along the helical direction centering on the shaft member. Configure multiple. the

(Effect)

Stirring and mixing can be performed more efficiently by adopting the configuration such as the transfer interval. This can also be confirmed experimentally. the

(Invention No. 14)

The pipeline type mixing device according to any one of the 4th to 13th inventions, wherein the spiral blade has 1 to 3 turns and a pitch of 0.4 to 0.8 times the diameter of the mixing tube, and the stirring blade 5 to 15 pitches are arranged at intervals of 4 to 6 pieces per pitch along the helical direction centering on the above-mentioned shaft member. The rotational speed is 150-200/πd (rpm), and the material flow velocity v in the mixing line when the device is driven is 10-50 m/min. the

(Effect)

The in-line mixer of the present invention exhibits the above characteristics particularly under the configuration and operation conditions of the spiral blade and the stirring blade. Of course, in addition to this, the above-mentioned characteristics are also reflected. the

(Invention No. 15) 

The curing agent supply device of the present invention mixes powder and liquid to produce a curing agent and supplies it to the outside; it is characterized in that it includes a device for supplying the powder in a falling manner, and the falling powder is fed from its surroundings. A device that supplies liquid in a cascading manner by sandwiching or squeezing powder or grain, and makes the powder or grain merge with the liquid, and a stirring and mixing device that stirs and mixes the merged powder or liquid with the liquid. the

(Effect)

When producing a solidifying agent by mixing a powder and a liquid, for example, when mixing cement and muddy water or water, it is very difficult to continuously combine the two as described above. Regarding this problem, when the liquid is supplied in a cascading manner to sandwich or squeeze the powder or grain from its surroundings relative to the fallen powder or grain as described above, the powder or grain is surrounded by the liquid, so the powder or grain does not adhere to the surroundings. , which can indeed merge the two. As a result, a more correct mixing ratio of the curing agent can be obtained. the

(Invention No. 16)

The curing agent supply device of the present invention mixes powder and liquid to produce a curing agent and supplies it to the outside; it is characterized in that it includes a device for supplying the powder in a falling manner, and the powder is rotated and dropped while the liquid is rotated. It is a device that falls into its rotating part to make the powder and liquid merge, and a stirring and mixing device that stirs and mixes the powder fluid and liquid that flow together. the

(Effect)

Unlike the fifteenth invention described above, the powder or grain is dropped into the rotating part while the liquid is rotated down, and the powder or grain is merged with the liquid to enclose the powder or grain in the liquid. Therefore, similarly to the fifteenth invention, the powder and granules do not adhere to the surroundings, and both can be reliably merged. As a result, a more correct mixing ratio of the curing agent can be obtained. the

(Invention No. 17)

The specific gravity adjustment device of the present invention is characterized in that: it includes a specific gravity adjustment tank into which a fluid material containing moisture and solid components is charged, and a volume measuring device for measuring the volume of the fluid material in the above-mentioned specific gravity adjustment tank measures the volume in the above-mentioned specific gravity adjustment tank. The weight measuring device for the weight of the fluid material, the specific gravity measuring device for obtaining the specific gravity based on the measurement result thereof, and the specific gravity is calculated to the specific gravity in order to make the fluid material in the specific gravity adjusting tank a predetermined specific gravity according to the measurement result of the specific gravity measuring device. A water adding device for adding water to the adjusting tank, and a draining device for draining water from the specific gravity adjusting tank so that the fluid material in the specific gravity adjusting tank becomes a predetermined specific gravity according to the measurement result of the specific gravity measuring device. the

(Effect)

Another aspect of the present invention relates to a device for adjusting the specific gravity of a fluid material containing water and solids such as soil, characterized in that it is configured so that not only water can be added but also water can be drained when adjusting the specific gravity. When the specific gravity is adjusted only by adding water, it is not possible to cope with a wide range of water content ratios, such as hydrated substances and situations where the water content ratio varies greatly. Hydrates for all water ratios. the

(Invention No. 18)

The specific gravity adjusting device according to the seventeenth invention, wherein the drainage device is configured to suck and discharge the clarified water at the upper part of the fluid material stored in the specific gravity adjusting tank. the

(Effect)

When the specific gravity is adjusted by suction and discharge of the upper clarified water in this way, the configuration is very simple, the cost is low, and the application to existing devices is easy. the

(Invention No. 19)

The specific gravity adjusting device according to the seventeenth or eighteenth invention, wherein the drainage device is configured to suck and discharge moisture of the fluid material stored in the specific gravity adjusting tank through a filter medium. the

(Effect)

When the specific gravity is adjusted by suctioning and discharging the moisture of the fluid material through the filter medium, the processing speed and reliability can be realized. In addition, if it is of this level, the configuration is simple, the cost is not high, and the application to existing devices is easy. the

(Invention No. 20)

The specific gravity adjusting device according to any one of the 17th to 19th inventions, which includes a stirring and mixing device for stirring and mixing the above-mentioned fluid material after the specific gravity adjustment, and a delivery device for sending the stirred and mixed fluid material to the outside. device. the

(Effect)

In the specific gravity adjusting device of the present invention, since the fluid material is temporarily stored in the specific gravity adjusting tank, the separation of water and solid components proceeds. Therefore, as described above, it is preferable to supply the fluid material after the adjustment of the specific gravity to the outside after being stirred and mixed. the

Description of drawings

Fig. 1 is a flow chart of the manufacturing method of the lightweight solidified material of the present invention. the

Fig. 2 is a flow chart of another manufacturing method of the lightweight solidified material of the present invention. the

Figure 3 is a flow chart of an additional method of manufacturing a lightweight cured material of the present invention. the

Fig. 4 is a longitudinal sectional view showing a first example of a pipeline mixer. the

Fig. 5 is a longitudinal sectional view showing a second example of the pipeline mixer. the

Fig. 6 is a longitudinal sectional view showing a third example of the pipeline mixer. the

Fig. 7 is a longitudinal sectional view showing a fifth example of the pipeline type mixer. the

Fig. 8 is a longitudinal sectional view showing a sixth example of the pipeline type mixer. the

Fig. 9 is an enlarged vertical and cross-sectional view of main parts of the in-line mixer, showing states of different rotation angles. the

Fig. 10 is an explanatory diagram of the principle of agitation and mixing. the

Fig. 11 is a longitudinal sectional view showing another example of an in-line mixer. the

Fig. 12 is a longitudinal sectional view showing another example of an in-line mixer. the

Fig. 13 is a longitudinal sectional view showing an example in which a plurality of pipeline type mixers are connected. the

Fig. 14 is a longitudinal sectional view showing another example in which a plurality of pipeline type mixers are connected. the

Fig. 15 is a longitudinal sectional view showing still another example in which a plurality of pipeline type mixers are connected. the

Fig. 16 is a longitudinal sectional view showing an example of a curing agent supply device. the

Fig. 17 is a longitudinal sectional view showing another example of a curing agent supply device. the

Fig. 18 is a longitudinal sectional view showing an example of a specific gravity adjusting device. the

Fig. 19 is a longitudinal sectional view showing another example of a specific gravity adjusting device. the

Fig. 20 is a cross-sectional view showing an arrangement example of filter media. the

Detailed ways

Embodiments of the present invention will be described in detail below with reference to the drawings. the

(Manufacturing method and device implementation form of lightweight solidified material) 

(1st form)

FIG. 1 is a flowchart showing a method of manufacturing a lightweight cured material of the present invention. As the fluid raw material used in the present invention, the type is not particularly considered as long as it contains moisture and solid content, but it is preferable to use industrial waste such as muddy water, soil, slurry lime, and steel slag. If muddy water and dirt are used, lightweight soil can be made. the

The water ratio of the by-products is not the same. Therefore, in the present invention, the fluidity raw material is first supplied to the specific gravity adjusting device 1, and the specific gravity is measured. At the same time, in order to make the compounding ratio of the curing agent and the lightweight agent mixed later into a desired ratio based on the measurement result, the The specific gravity is adjusted by adding or removing moisture. A specific example of the specific gravity adjustment device 1 will be described later, but a device having a function of dissolving a fluid material, a specific gravity adjustment function, and a remixing function is suitably used. the

The fluid material whose specific gravity has been adjusted is sent out to the transfer line by the pump device 2 . A first pipeline type mixer 4 and a second pipeline type mixer 5 are provided on the transfer line, and the fluid raw materials pass through them sequentially. The first pipeline type mixer 4 and the second pipeline type mixer 5 meet the requirements of the present invention, and have a mixing pipeline, a shaft member coaxially supported in the mixing pipeline, The helical blade and the stirring blade arranged side by side in sequence, the rotary drive device of the shaft member, and at least one additive supply port provided at the position corresponding to the agitating blade of the shaft member; After the flowing material in the pipeline is transferred to the additive supply port side, the additive is supplied to the flowing material from the additive supply port, and the flowing material and the additive are stirred and mixed by the stirring blade driven by rotation, and the same machine can be used for both. A different composition may also be used for the composition. A preferred specific example of the pipeline type mixer will be described later, but the method of the present invention is not limited thereto, and a conventional pipeline type mixer can also be used. the

In the first pipeline type mixer 4 , the curing agent supplied from the curing agent supply device is added and mixed from the additive supply port of the rotating shaft member while passing through the pipeline. In the illustrated example, a solidifying agent such as cement (in this case, the raw material of the curing agent) is supplied from the silo 6s to the curing agent supply device 6 at any time, and the curing agent supply device 6 is mixed with a liquid such as water to form After the slurry solidifying agent is added, it is supplied to the first pipeline type mixer 4 . the

The fluid raw material to which the curing agent has been added in the first in-line mixer 4 is then passed to the second in-line mixer 5 . In the second pipeline type mixer 5, lightening agents such as foaming agents, foam beads, foam resin crushed chips, etc. are added and mixed during the process of passing through the pipeline. the

In this way, due to passing through the first and second solidifying mixers 4 and 5, the fluidity raw material is changed into a lightweight solidified material during the transfer process. At this time, in this first embodiment, it is characterized in that only the original pressure of the pump that sends the fluid raw material after the specific gravity adjustment to the transfer line is passed through the first and second curing type mixers 4 , The composition of 5 becomes a very simple and energy-saving composition. In addition, the mixing ratio of fluidity raw materials and curing agent or lightening agent of the 1st and the 2nd pipeline type mixer 4,5 can be by measuring the flow rate between the delivery pump and the 1st pipeline type mixer 4, and this Accordingly, it is determined by adjusting or controlling the supply amount of the curing agent supply device 6 or the supply amount of the lightweight agent. the

In the example shown in the figure, when a lightweight solidified material is put into the backfill of the retaining wall W covering the slope G, it is changed into a lightweight solidified material C while the fluid raw material is being transported toward the slope. the

(form 2)

On the other hand, the example shown in FIG. 2 shows an example of the system configuration in the case of a hopper-feeding line type mixer 4' (details will be described later as a fifth example of the mixer). That is, the fluid raw material is supplied to the specific gravity adjusting device 1, and after the specific gravity is adjusted in the same manner as in the example shown in FIG. Mixer 4'. the

The fluid raw material supplied to the first pipeline type mixer 4' is sequentially transferred by the push-out function of the mixer (details will be described later), and at the same time, during the transfer process, the solidifying agent supply device 6' is added and mixed. supplied curing agent. The example in the figure assumes that a solidifying agent such as cement is supplied from the silo 6s to the solidifying agent supply device 6 at any time, and the solidifying agent supply device 6 continuously supplies a predetermined amount to the first pipeline type mixer in the state of powder or granular 4' occasions. In this case, the compounding ratio of the fluid material and the curing agent can be determined by setting the supply amounts of the rotary feeder R and the curing agent supply device 6' in advance. the

In the first pipeline type mixer 4', the fluidity raw material added with curing agent is then supplied to the second pipeline type mixer 5 by the pressure feeding pump 2, and is mixed with the second pipeline type in the same way as the above example. Add and mix the lightweight agent in the process of the pipeline of machine 5, and change it into a lightweight solidified material. In this second form, the supply rate of the fluidity material relative to the second pipeline type mixer 5 is determined by the pressure-feeding flow rate of the pressure-feeding pump 2. For this reason, between the pressure-feeding pump 2 and the second pipeline A flow meter 3 is arranged between the type mixers 5, and the feed rate of the lightening agent is adjusted or controlled according to the measurement results thereof, so as to determine the mixing ratio of the second pipeline type mixer 5. Others are basically the same as the first form. the

(3rd form)

In the above-mentioned example, as a pipeline type mixer, a mixer for adding a curing agent and a mixer for adding a lightening agent are respectively provided. In the present invention, as shown in FIG. 3, one pipeline Type mixer 40 (the pipeline type mixer 40 in the figure is equivalent to the example shown in Fig. 11 described later), a plurality of additive supply ports are provided at appropriate intervals in the longitudinal direction of the shaft member, and additives can be added from the supply port on the upstream side. The curing agent and the lightening agent can also be added from the supply port on the downstream side. In this case, it is necessary to make the stirring and mixing part longer, but overall, since the addition and mixing of the curing agent and the lightweighting agent can be performed by one pipeline type mixer 40, there is an advantage that the system can be made compact. the

(deformed form)

As can be seen from the comparison between the above-mentioned first and second embodiments, in the case of using pipeline type mixers in series, the pressure feeding pump can be arranged at an appropriate location (one location or multiple locations) for material transfer. the

In addition, as long as the curing agent and lightweighting agent are added and mixed in this order, one or more line-type mixers can be added, or one or more additive supply ports can be added to the shaft member, and the curing agent can be added. Add the same or different materials before or after the lightweighting agent. Specifically, after adding and mixing the curing agent, coal ash is mixed as the first lightweighting agent, and then, as the second lightweighting agent, many changes such as inclusion of air bubbles are considered. the

(implementation form of pipeline mixer)

(1st Mixer Example)

FIG. 4 shows an embodiment in which the first fluid material X such as soil is pressure-fed into the pipeline mixer 10 by a pump or the like. That is, the pipeline type mixer 10 coaxially supports the shaft member 14 in the inner space of the mixing line 12 having the upstream side supply part 12i and the downstream side discharge part 12e. A plurality of helical blades 14s and agitation blades 14m are arranged vertically at intervals in this order. The base end portion of the shaft member 14 penetrates to the outside of the pipe through the S-shaped bent portion of the mixing pipe 12, and is connected so as to be able to transmit power to a rotary drive device 15 such as a motor. In addition, the shaft member 14 is formed in a hollow form, and a spray port 14a communicating with the inside and outside is formed at a position corresponding to the middle of the stirring blade forming part. The supply line 17 supplies the second fluid material Y to the forming portion of the stirring blade 14m through the interior of the shaft member 14 and the injection port 14a in this order. the

The first fluid material X is pressure-fed and supplied to the supply unit 12i of the in-line mixer 10, for example, by a piston pump or the like. The first flowing material supplied by pressure into the mixing pipe 12 is first reduced in potential and rectified by the helical blade 14s driven by rotation, and essentially becomes a continuous quantitative flow. At this time, pre-stirring is also performed at the same time depending on the type of the first fluid material X. In particular, when the first fluid material X is pumped and supplied by an intermittent supply device such as a piston pump, the first fluid material reaches the first fluid material X according to the fluctuation pattern of the state of the pressure feeding and the state of the pressure feeding stopped instantaneously and alternately repeated by the valve switching. Spiral blade 14s. The helical blade 14s of the present invention has the function of reducing the force of the wave and also sucking and pushing out when the pressure feeding is stopped. the

The first flowing material rectified by the spiral blade 14s is then preliminarily stirred by the stirring blade 14m driven by rotation on the upstream side of the injection port 14a, and then merges with the second flowing material Y quantitatively supplied from the injection port 14a. The first flow material and the second flow material are stirred and mixed by the stirring blade 14m driven by rotation at the position of the injection port and its downstream side, and the stirred mixture is discharged through the discharge part 12e. the

Especially in the case of feeding the first flowing material X by pressure feeding as in this example, in order to bring into play the above-mentioned rectification effect, it is suggested that the rectified amount per unit time of the screw blade 14s be not less than the supply amount per unit time of the first flowing material X. The adjustable flow rate of the spiral blade 14s can be obtained by experiments, and the supply amount of the first flow material X can be obtained from a predetermined pump capacity, and can be measured by inserting a flow meter or the like at the upstream side of the pipeline type mixing device 1 . In addition, according to the supply amount of the first flowing material, the rotation speed of the screw blade 14s generated by the rotary drive device 15 is appropriately set or controlled, or the size and shape of the screw blade 14s, the volume of the pipeline, etc. are appropriately designed. the

In the pipeline type mixing device 1 constructed in this way, the first flowing material supplied into the mixing pipeline 12 can be mixed with the second flowing material Y after being formed into a stable continuous quantitative flow by the rectifying effect produced by the spiral blade 14s. . Therefore, in the present invention, the first and second fluid materials X and Y can be mixed in a stable ratio. In the pipeline type mixer of the present invention utilizing this rectifying action, even when the first fluid material X is supplied by an intermittent supply device such as a piston pump, its pulsation can be canceled out by the spiral blade, and the quantification can be continued. the

The first flowing material X of this first mixer example may be mud such as slurry coal ash or steel slag in addition to muddy water and soil, and the second flowing material Y may be foaming in addition to cement and lime-based curing agent. Mixing agent, coal ash, foam beads, fluidizing agent, hydrophobic agent, etc. into soil materials. the

For example, solidified soil can be produced by pumping and supplying soil as the first fluid material X, adding and mixing a solidifying agent and the like as the second fluid material. As the curing agent and the like in this case, in the first example of the mixer, it is applicable regardless of whether it is in the form of a powder or a slurry. However, since the powdery solidified material is supplied together with the compressed air, in the case where no exhaust device is provided in the mixing line 12 as in this example, it becomes a mixed air supply in which air is mixed into the mixture. In this case, the pressure-feeding pressure for sending the mixture to the discharge unit 12e adds the pressure of the supply air of the solidifying agent to the supply pressure of the soil. On the other hand, when the slurry curing agent is added, it does not become mixed air feeding. In this case, the pressure feeding pressure to send the mixture to the discharge unit 12e is realized by the supply pressure of soil. the

(The 2nd mixer example)

As in the first example, when the mixing line 12 is a straight pipe, arranged horizontally, and discharged from an opening at the end, or although not shown in the figure, the mixing line is actually a straight pipe, arranged horizontally, and has a discharge part on the bottom surface. When a part or all of the downstream side of the stirring blade 14m is located below the part corresponding to the screw blade 14s and the stirring blade 14m, the material is not easy to be filled with the screw blade 14s and the stirring blade because the sending resistance of the mixture is small. In the portion corresponding to the blade 14m, it is assumed that mixing at a desired ratio cannot be performed. the

The portion corresponding to the helical blade 14s and the agitating blade 14m of the mixing pipeline 12 in the second example shown in FIG. The upper side of the part corresponding to the stirring blade 14m is comprised. By adopting this structure, even if the mixing line 12 is straight and horizontally arranged, the sending resistance of the stirred mixture is increased, and the flowing material is filled to the corresponding part of the spiral blade 14s and the stirring blade 14m, and reliable and sufficient mixing can be performed. In addition, when there is resistance to sending out the stirred mixture, since a stable amount can be discharged, it is easy to control the amount. the

(The 3rd mixer example)

As shown in FIG. 6, although the mixing line 12 is a straight pipe, by inclining the entire pipe 2 so that the downstream side becomes the upper side, the delivery resistance of the mixing can be increased, and the material can be filled in the stirring and mixing part. In the illustrated form, a discharge portion (discharge port) 12e is provided at the bottom of the downstream end of the mixing line 12, but since the discharge portion 12e is located above the portion corresponding to the spiral blade 14s and the stirring blade 14m, , the delivery resistance of the mixture increases, which does not change. In addition, only the example shown in FIG. 6 bends the upstream side bending portion in the horizontal direction, but the same configuration can be employed in other examples. the

(The 4th mixer example)

Although not shown, even if the mixing line is a straight pipe, by providing the discharge part 12e at the upper part of the downstream end, the mixture overflows, thereby increasing the delivery resistance of the mixture, and filling the stirring and mixing part with the material. the

(No. 5 mixer example)

On the other hand, FIG. 7 shows an embodiment suitable for the case where the first fluid material X is supplied in a non-pressurized state to the inside of the mixing line 12 . In the pipeline-type mixing device example of the second embodiment, the mixing pipeline 12 is a straight pipe, and communicates with the upper wall at the position corresponding to the part where the spiral blade 14s is formed to form a supply for dropping and supplying the first fluid material X. Part (supply port) 12i is different from other examples in that it communicates with the hopper 12h through a quantitative feeder (rotary feeder in the figure) 12r with respect to the supply part. Other constitutions are basically the same as the above-mentioned examples. the

In this line-type mixing device, the first fluid material X stored in the hopper 12h is dispensed by the quantitative feeder 12r, and is dropped and supplied into the mixing line 12 through the supply part 12i. The supplied first fluid material X is pushed out to the side of the discharge part 12e as a continuous constant flow by the pushing action of the screw blade 14s. The first flowing material pushed out is preliminarily stirred by the stirring blade 14m driven by rotation on the upstream side of the injection port 14a, and then merges with the second flowing material Y quantitatively injected from the injection port 14a. The flowing material is stirred and mixed at the position of the injection port 14a and its downstream side by the stirring blade 14m driven to rotate, and the stirred mixture is discharged through the discharge part 12e. the

In this way, when the first flow material X is supplied in a non-pressure-feed state, when the push-out amount per unit time realized by the screw blade 14s is less than the supply amount per unit time of the first flow material X, the supplied material X cannot be stably and reliably The first flowing material X is sent to the downstream side part of the spiral blade 14s, and this part cannot be filled with material, and it is difficult to mix in a stable ratio. Therefore, it is preferable that the pushing amount per unit time by the screw blade 14s is not smaller than the supplying amount per unit time of the first fluid material X. In this way, the downstream side of the screw blade 14s can always be filled with material. In this case, the amount of mixed material pushed out by the screw blade 14s is reliably discharged from the mixing device. the

(The 6th mixer example)

In addition, in the present invention, as shown in FIG. 8 , the first fluid material X may be supplied into the mixing line 12 from a supply port 14 d separately provided on the shaft member 14 . In this case, the shaft member 14 is composed of double-layer pipes (or two parallel pipes), and the discharge ports 14a and 14d of the flow paths are opened on the outside of the shaft member, and one side is used as the first flow material X, and the other side is used as the first flow material X. The other is used as the second flowable material Y. In this case, for example, mixed water, muddy water, and soil are supplied from the upstream side, and at the same time, powdery or granular solidifying agent or slurry-like solidifying agent is supplied from the downstream side, whereby slurry-like solidifying agent or solidified soil can be produced. the

(Detailed composition of the mixer)

As described in the item of the example of the first mixer, the slurry material is fed by pump pressure, and when the powder is supplied by compressed air, when there is no exhaust device, it becomes a mixed air feed. In this case, since the volume of air tends to change, it is assumed that the transfer cannot be carried out smoothly. In this case, as shown in the third and fourth examples, it is preferable to install an exhaust device on the upper part of the mixing line 12 on the downstream side of the powder or granular material supply position. In the illustrated example, a recessed space 12s is provided at a predetermined position of the mixing line 12, and an exhaust device is provided by communicating with an exhaust port 12d at an upper portion of the recessed space 12s. On the other hand, when the curing agent and the like are supplied in a slurry state, an exhaust device is not required. the

In addition, in the form of feeding the first fluid material X by pressure feeding, there is a rectifying and reducing force by the helical blade 14s. Therefore, it is assumed that the sending force of the mixture is weakened and cannot be discharged smoothly. Therefore, as shown in FIGS. 4 and 5 , it is preferable to provide a booster screw blade 14 b on the downstream side of the stirring blade 14 m of the shaft member 14 to promote the delivery of the mixture to the downstream side discharge portion. In the examples shown in FIGS. 6 to 8 , the helical blade 14 r provided on the downstream side of the stirring blade 14 m of the shaft member 14 does not have the above-mentioned boosting action. This is because the transfer direction of the upstream screw blade 14s or the booster screw blade 14b is in the opposite direction, and is used to push back the mixture sequentially pushed out by the stirring blade through the discharge portion 12e at the bottom of the mixing line 12, Make it fall smoothly into the discharge port. the

In addition, in the pipeline type mixer of the present invention, it is also preferable to provide a cover member 14c on the front side of the second material supply port 14a of the shaft member in the rotation direction of the shaft member as shown in FIGS. 3 to 9 . The cover member 14c rotates along with the shaft member 14 while pushing away the stirrer, so a supply space (cavity) for the second flow material is always formed at the second material supply port 14a position, and the second flow material is sent out from the supply port 14a. to that space. Therefore, it is possible to smoothly and reliably distribute and supply the second fluid material into the first fluid material. 9( a ) and ( b ) comparatively show the case where the feed angles differ by 90° from each other, and both have the same configuration. the

Stirring blade 14m of the present invention is as shown in detail in Fig. 9, is made of the multifunctional blade m2 that has stirring effect and mixing object transfer effect and the single function blade m1 that only has stirring effect, preferably along the shaft member 14 as the center In the helical direction, every one or two multifunctional blades m2 intervenes alternately with one single functional blade m1. In the illustrated example, the multifunctional blade m2 is a flat plate inclined at a predetermined angle with respect to the plane perpendicular to the axis, while the single function blade m1 is a flat plate parallel to the plane perpendicular to the axis. Mixing performance can be improved without impairing transfer characteristics by adopting an alternate arrangement. the

The multifunctional blade m2 may be formed in the shape of an impeller (curved plate) that cuts out the helical part, but in fact, when it is formed in a flat plate shape as shown in the figure and placed across the shaft, depending on the position where the soil contacts, The movement direction of the soil is changed, and the mixing performance is further improved, so it is preferable. That is, as shown in FIG. 10 , at points A and B on the radius of gyration, the pushing force P acting at right angles along the gyration direction produces a moving force P1 outward at point A along the surface of the flat multifunctional blade. , A moving force P2 toward the inside is generated at point B, which increases the stirring effect. the

However, in the pipeline type mixer of the present invention, only one of the agitating blades can be used to adjust the supply pressure of the first flow material and the like. the

In addition, when a plurality of agitating blades 14m of the present invention are arranged at a phase interval of 90° or 60° along the helical direction centering on the shaft member 14, more effective agitation and mixing can be performed. the

In addition, the present inventors have found that the combination of the configuration and operating conditions of the spiral blade 14 s and the stirring blade 14 m described below is very appropriate based on the results of research and development up to now. the

(1) The number of turns of the spiral blade: 1 to 3 (pieces)

(2) Pitch (SP) of the spiral blade: 0.4 to 0.8 of the diameter of the mixing tube

(3) Configuration of stirring blades: spiral configuration

(4) The number of stirring blades: each pitch (MP) is 4 to 6 pieces at intervals, 5 to 15 pitches

(5) The rotational speed of the shaft member during operation: 150～200/πd(rpm)

Among them, d is the diameter of the spiral blade and the stirring blade. the

(6) Material flow rate v in the mixing pipeline: 10～50m/min

(Example of forming multiple supply ports of the shaft member)

On the other hand, in the pipeline type mixing device of the present invention, three or more supply devices are provided in one pipeline type mixing device, and two or more than three kinds of materials are supplied to the The mixing line is formed inland. the

Specifically, as shown in FIGS. 11 and 12 , the portion corresponding to the stirring blade 14m is made longer, and a plurality of supply ports are provided at predetermined intervals in the portion of the shaft member 14 corresponding to the stirring blade 14m. The example shown in Figure 11 modifies the above-mentioned 2nd example, and the example shown in Figure 12 modifies the above-mentioned 3rd example, adding a supply port 14a of the shaft member, and the basic structure is as described above. However, in these Examples 40 and 50, the downstream side end portion of the shaft member 14 is penetrated and led out of the mixing line 12, and at the same time, the second material supply port 14a in the shaft member 14 and the gap between the second material supply port 14a Partially blocked by a blocking member not shown in the figure. In this way, if the material Y1 that was previously added and mixed is supplied from the upstream side end of the shaft member 14, it is supplied from the upstream side supply port 14a into the mixing line 12, and is located between the upstream side and the downstream side supply port 14a, 14a. The agitating blade 14m is mixed with the first fluid material X. In addition, if the material Y2 that is added and mixed later is supplied from the downstream side end of the shaft member 14, it is supplied into the mixing line 12 from the downstream side supply port 14a, and is stirred by the stirring blade located on the downstream side of the downstream side supply port 14a. 14m is mixed with the first flow material X mixed with the material Y1. the

In this case, the material Y1 supplied from the second material supply port 14a and the material Y2 supplied from the downstream side supply port may be the same or different. In addition, it is also possible to further increase the number of supply ports of the shaft member 14. In this case, the shaft member 14 is formed into a multi-layer pipe structure with more than two layers, and the supply path of the flowing material is formed by the gap between the pipes and the pipes (Fig. not shown). the

(Example of multiple pipeline mixers connected in series)

The pipeline type mixer of the present invention is set as a part of the material delivery pipeline, so that it can be mixed with other additive materials (second flowing material) during the material delivery process. In the case of pipeline supply of various additives, etc., although it is also possible to install only one pipeline type mixer in one conveying line, it is also possible to directly or A plurality of pipeline-type mixing devices are indirectly connected in series through other devices and pipelines, and in each pipeline-type mixing device, additional mixing of the additive material is performed sequentially. the

This specific example is shown in FIGS. 13 to 15 . In the example shown in FIG. 13 , the mixers 10 and 10 of the above-mentioned first example are connected in series through the delivery pipe T, and the second and third flow materials Y1 and Y2 are sequentially mixed with respect to the first flow material X. In addition, as shown in FIG. 14, an upstream side mixer 10A having a discharge portion 12e opening downward is disposed on the upstream side, and a downstream side mixer 10B having a supply port 12i opening upward is disposed on the downstream side, and the upstream side mixer 10A is directly connected. The downward discharge port 12e and the upward supply port 12i of the downstream side mixer 10B integrate the two mixers 10A, 10B. The case where there are a plurality of mixing sections in this way is also included in the in-line mixer of the present invention. In the example shown in FIG. 14 , according to the positional relationship between the material transfer source and the transfer destination, one mixer 10A can be arranged to rotate at any angle with respect to the other mixer 10B around the connection part, or it can be For example, as shown in FIG. 15 , a U-shaped arrangement is formed in which the material is turned and fed. the

In these specific examples, of course, other in-line mixers (not shown in the drawings) described above may also be used. the

However, the above-mentioned production method of the lightweight solidified material is applied to the serial form, but the series form of the in-line mixer of the present invention is not limited to the above-mentioned production method of the lightweight solidified material. For example, it can also be used in a form in which the light weight material is supplied to the first in-line mixer 4 and the curing agent is mixed in the second in-line mixer 5 in contrast to the above-mentioned production method of the light-weight hardening material. the

(implementation form of curing agent supply device)

Fig. 16 shows an example of a curing agent supply device of the present invention. Reference numeral 20 denotes a powder storage hopper for temporarily storing powder such as cement, and powder stored in a silo, for example, is supplied into the hopper 20 from an upper supply port 20i as needed. the

The powder solidifying agent supplied to the hopper 20 is separated by a quantitative separation device (the example in the figure is a rotary feeder) 21, and is discharged from the discharge port, and passes through the radial center of the linear confluent pipeline 22 along the vertical direction. A part is thrown into the supply part 23i of the stirring mixing apparatus 23. A ring-shaped liquid storage weir 22d is provided around the central part where the powders and grains fall and flow in the confluent pipeline 22, and the liquid supply pipe 22i penetrating the pipe wall communicates with the weir 22d (outside the central part). Therefore, when a liquid (water, additive, etc.) is supplied from the liquid supply pipe 22i, the liquid is temporarily stored in the weir 22d, overflows from the weir 22d, and is supplied to the central portion in a waterfall. On the other hand, the agitating and mixing device 23 is basically the same as the case where the hopper, the rotary feeder, and the exhaust device are omitted from the above-mentioned pipeline type mixer shown in FIG. 7 , so description thereof will be omitted. the

In the curing agent supply device configured in this way, the powder or grain that is dropped and supplied into the confluence line 22 is supplied in a waterfall form by overflowing from the surrounding weir 22d while passing through the central part of the confluence line 22 . The liquid is sandwiched or squeezed in, surrounded by the liquid, and thus merged with the liquid. After the combined powder and liquid are stirred and mixed by the stirring and mixing device 23, they are sent to the outside. the

Fig. 17 shows another example of a curing agent supply device of the present invention. In this form, compared with the form shown in FIG. 16, the confluence pipeline is a silo chute 22S in the shape of an inverted frustum of cone, and the inner wall at its upper part communicates with the liquid supply pipe 22i toward the inner peripheral direction. This is the main difference. point. In this case, the liquid supplied from the liquid supply pipe into the silo chute rotates and descends along the inner peripheral surface. Therefore, the powder or grain which fell in the silo chute 22S falls in the rotating descending part of the liquid, and is surrounded by the liquid and merges. The stirring and mixing device 24 is a pipeline-type mixer, and has a horizontal straight pipe-type mixing pipeline in which a supply port 24i communicated with the lower part of the silo chute 22S is formed on the upper part of the upstream side, and a discharge port 24e is formed on the upper part of the downstream side end. The mixture is discharged from the discharge port 24e by overflow. the

In these examples, since the powders and grains are merged by being surrounded by the liquid, the powders and grains can be reliably and continuously merged without adhering the powders and grains to the inner surface of the merging pipe and the inner surface of the agitator and mixer. In addition, there is an advantage of obtaining a curing agent with a more accurate compounding ratio. the

In addition, in these examples, as shown in the figure, the hopper 20 and the quantitative separation device 21 are connected to the confluent pipeline 22 and the like through the flexible joint 25, and at the same time, they are suspended by the load cells 26, 26. According to the load cell The measured value of 26 can measure the amount of stored powder or grain in the hopper 20 and the quantitative separating device 21 . In addition, a method of controlling the amount of liquid by supplying it from a quantitative pump through a flow meter, or a method of supplying it from a water tank or bucket through a rotary feeder (illustration omitted) may be employed. In addition, in the above example, the in-line type mixer was used as the agitation and mixing devices 23 and 24, but a batch type or a continuous type agitation device may also be used. the

(implementation form of specific gravity adjustment device)

For example, as described above, when using materials with unstable quality such as dredged soil, quality control is important. One of its main parameters is specific gravity management. Specific gravity management of fluid materials containing water and solids is nothing more than adjusting the water content. Among them, a specific gravity adjusting device capable of handling hydrated substances with a wide range of water content ratios and when the water content ratio varies widely has also been proposed. the

FIG. 18 shows an example 30 of a specific gravity adjusting device according to the present invention, which has a specific gravity adjusting groove 31 as a main structure. The specific gravity adjustment tank 31 has a water level sensor 31S as a volume measuring device for measuring the volume of the fluid material in the tank. That is, since the specific gravity adjustment tank has a certain volume, the volume of the fluid material in the tank can be measured only by measuring the water level with the water level sensor 31S. the

In addition, in the illustrated form, the specific gravity adjustment tank 31 is suspended by load cells 31L, 31L, and the weight of the fluid material in the tank can be measured by the load cell 31L. From these measurement results, the specific gravity of the fluid material in the tank 31 can be obtained. This specific gravity measurement is performed, for example, by the control apparatus shown in figure. the

In addition, a supply pipe 31A and a water supply pipe 31B facing the fluid material in the tank 31 are opened above the tank 31 , and a suction pipe 31C for sucking upper clarified water is inserted into the upper part of the tank 31 . the

In the specific gravity adjustment tank 31 configured in this way, the volume and mass of the fluid material put into the tank 31 are measured by the water level sensor 31S and the load cell 31L to measure the specific gravity of the fluid material. In the case of a certain specific gravity, the required amount of water is sucked through the suction pipe 31C for drainage, and in the case of a larger than desired specific gravity, the specific gravity can be adjusted by adding a required amount of water through the water supply pipe 31B. That is, the specific gravity adjustment tank 31 is mainly filled with water, and when drainage is required, it is in a mode of waiting for the sedimentation of the soil particles and discharging the upper clarified water. This action can be performed by a control device not shown in the figure. the

On the other hand, in this embodiment, a discharge port is provided at the bottom of the specific gravity adjustment tank 31, and the discharge port communicates with the stirring tank 33 (stirring mixing device) through a valve such as a gate valve 32 . Therefore, the flowable material whose specific gravity has been adjusted is supplied to the stirring tank 33 by opening the gate valve 32, and is stirred and mixed. When the fluid material is temporarily stored in the specific gravity adjustment tank 31, moisture and solid content are separated, so that the fluid material whose specific gravity has been adjusted is preferably supplied to the outside through stirring and mixing treatment. the

The agitation tank 33 of illustration example supports the agitation shaft 33x along the horizontal direction at the lower part, and a plurality of multifunctional blades m2 with transfer function and agitation function are set outside the agitation shaft 33x, and the agitation shaft 33x is connected to the outside of the groove 33. The driving source 33m is driven to rotate, and a discharge port is formed at the bottom of the tank of the agitator at a position on the downstream side in the material transfer direction by the multifunctional blade m2. the

In addition, the specific gravity adjusting device shown in the figure assumes the above-mentioned manufacturing method shown in FIG. ', the flowable material stirred in the stirring tank 33 is separated by the separating device R, and quantitatively supplied to the first pipeline type mixer 4'. In addition, in this case, in order to improve the accuracy of supply to the pipeline type mixer 4', it is preferable to hang the stirring tank 33 by the load sensor 33L in the illustrated form, and to correspond to the stirring tank 33 measured by the load sensor 33L. The amount of fluid material remaining in the tank 33 controls the rotation of the quantitative separation device R. the

19 shows an example in which the moisture of the fluidity material stored in the specific gravity adjustment tank 31 is actively suctioned and drained through the filter medium 31F (it can also be sucked through the filter medium when discharging the upper clarified water as described above). the

More specifically, a filter medium 31F such as filter cloth is provided to surround the central part in the specific gravity adjustment tank 31, and the drainage space 31z between the outer surface of the filter medium 31F and the inner surface of the tank 31 is separated from the filter medium surrounded by the filter medium 31F. Inside, the suction pipe 31C passes through the groove wall so that it faces the inside of the drainage space 31z. In addition, the supply pipe 31A and the water supply pipe 31B of the fluid material toward the inside of the tank 31 are opened in the enclosed part formed by the filter medium 31F. the

In this case, when draining water, when the flowable material is supplied to the portion surrounded by the filter medium 31F in the adjustment tank 31, only the water seeps through the filter medium 31F to the drainage space 31z by the pressure of its own weight, and is sucked by the suction pipe 31C. The required amount of this seepage water is drained off. the

In this form, as long as the above-mentioned functions can be exhibited, the arrangement of the filter medium 31F is optional. In the case of using a filter cloth as a filter medium, as shown in Figure 20, a cylindrical filter cloth can be arranged along the inner peripheral surface of the specific gravity adjustment tank 31 as shown in (a), and erected as in (b). The required number of filter cloth supporting members 31P, 31P protrude partially toward the center side at predetermined intervals in the circumferential direction, and are arranged in a star shape with six vertices as shown in (c). the

In addition, the specific gravity adjusting device 30' shown in FIG. 19 assumes the above-mentioned manufacturing method shown in FIG. While sending out the flowing material to the outside (the first in-line mixer 4 in the illustrated form of FIG. 1 ). the

As described above, according to the present invention, mixing at a stable ratio can be performed. In addition, homogeneous lightweight solidified materials can be produced from earth and muddy water. the

Claims (3)

1. A pipeline type mixing device comprising a mixing pipeline having an upstream side supply part for pressure-feeding a first flow material and a downstream side discharge part for discharging a mixture, a shaft member coaxially supported in the mixing pipeline, On the outer surface of the shaft member, the helical blade and the stirring blade arranged side by side in sequence from the upstream side, the rotary drive device of the shaft member, and the supply port of the second flow material provided at the position corresponding to the stirring blade of the above-mentioned shaft member; its characteristics In that: after the first flow material supplied into the mixing pipeline is rectified by the spiral blade driven by rotation, the second flow material is supplied to the first flow material from the supply port of the above-mentioned shaft member, and the second flow material is supplied to the first flow material by the screw blade driven by rotation. The agitating blade stirs and mixes the first flow material and the second flow material, and discharges the agitated mixture through the above-mentioned discharge portion, and a cover member is provided on the front side of the shaft member in the rotation direction of the second flow material supply port of the above-mentioned shaft member, The cover member pushes the agitator away as the shaft member rotates, thereby forming a supply space for the second flow material at the second flow material supply port. The above-mentioned mixing pipeline is configured as follows. The mixing pipeline is a straight pipe, and The mixing pipe is inclined so that the downstream side becomes the upper side, and a part or all of the downstream side of the above-mentioned agitation blade is located at a position on the upper side compared with the rest of the above-mentioned helical blade and agitation blade, thereby making the first The flowing material, the second flowing material and their mixture always fill at least the downstream side part of the spiral blade. 2. The pipeline type mixing device according to claim 1, characterized in that: as the above-mentioned stirring blades, there are multifunctional blades with stirring action and mixing object transfer action and single-function blades with only stirring action, which are arranged along the The helical direction centered on the above-mentioned shaft member is set in an alternate arrangement in which one single-function blade intervenes every one or two multi-function blades. 3. The pipeline type mixing device according to claim 1, characterized in that: the number of turns of the above-mentioned helical blade is 1-3, and the pitch is 0.4-0.8 times the diameter of the above-mentioned mixing pipeline, and the above-mentioned stirring blade is along the 5 to 15 pitches are arranged at intervals of 4 to 6 sheets in the helical direction centering on the above-mentioned shaft member. When the diameter of the above-mentioned helical blade and stirring blade is d, the rotational speed of the above-mentioned shaft member when the device is driven 150 to 200/πd (rpm), and the material flow velocity v in the mixing line when the device is driven is 10 to 50 m/min.

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