CN222816799U - Metering device - Google Patents

Abstract

The utility model provides a metering device which comprises a first tank body, an adjusting piece and a first gap, wherein the first tank body is provided with a first opening, a liquid outlet is formed in the bottom of the first tank body and is used for containing liquid, the adjusting piece is located above the opening of the first tank body and can move at least partially from the opening to the inside of the first tank body, and when the adjusting piece is located at least partially inside the first tank body, the adjusting piece, the inner peripheral wall of the first tank body and the first opening are provided with the first gap. According to the utility model, the technical problem that the metering operation difficulty is high in the toxic and harmful liquid in the prior art can be solved.

Description

Metering device

Technical Field

The utility model belongs to the technical field of metering, and particularly relates to a metering device.

Background

The liquid feeding metering method is a method for accurately measuring and controlling the liquid feeding amount, and is suitable for liquid feeding in various industrial processing and production processes. Among the most common liquid feed metering methods include weighing metering, flow metering, and the like.

The weighing and metering method determines the amount of charge by placing a liquid charge vessel on a scale, and accurately measuring the weight of the liquid. The method is suitable for liquids with various viscosities and densities, and is particularly suitable for production processes requiring accurate feeding amount.

The flow metering method determines the feed rate by measuring the flow of liquid through a pipe. Commonly used flow meters are instantaneous flow meters, cumulative flow meters, control valves, and the like. The method is suitable for the production process requiring rapid and continuous feeding, such as chemical industry, pharmacy and other industries.

Regardless of the metering method, the accuracy and stability of the feeding amount are required to be ensured in the liquid feeding process so as to ensure the quality of products and the high efficiency of industrial production. Some existing small amounts of poisonous and harmful liquid need to be metered in the use process, if weighing metering is adopted, manual dumping is needed, the dosage of each time cannot be well controlled, the situation of excessive dumping or too little dumping possibly exists, the liquid is poisonous and harmful, the health and safety of operators are not easy, the weighing precision of the flow metering to a small amount of liquid is too low, and the production requirement cannot be met.

Because the toxic and harmful liquid in the prior art has the technical problems of high metering operation difficulty, low metering precision and the like, the utility model designs the metering device.

Disclosure of utility model

Therefore, the utility model provides a metering device which can solve the technical problem that the metering operation difficulty is high in the toxic and harmful liquid in the prior art.

In order to solve the problems, the utility model provides a metering device, which comprises a first tank body, a second tank body and a metering device, wherein the first tank body is provided with a first opening, the bottom of the first tank body is provided with a liquid outlet, and the first tank body is used for containing liquid;

The liquid filling device comprises a first tank body, a regulating piece, a liquid filling device and a liquid filling device, wherein the regulating piece is positioned above an opening of the first tank body, and can move at least partially from the opening to the inside of the first tank body, and when the regulating piece is positioned at least partially inside the first tank body, a first gap exists between the regulating piece and the inner peripheral wall of the first tank body and between the regulating piece and the first opening, and liquid can flow into the first gap through the opening.

In some embodiments, the metering device further comprises a second tank body, the second tank body is arranged on the first tank body, the second tank body is provided with a second opening, the second opening is communicated with the first opening, the regulating piece is positioned inside the second tank body, a second gap is reserved between the regulating piece and the inner walls of the second opening and the second tank body, and the second tank body is provided with a liquid inlet and an overflow port.

In some embodiments, the metering device further comprises a liquid reservoir, and the liquid inlet and the overflow port are both in communication with the liquid reservoir.

In some embodiments, the second tank body is provided with a communication port, the direction perpendicular to the ground is a vertical direction, along the vertical direction, the communication port is located above the liquid inlet, the communication port is communicated with the liquid storage tank, and the communication port is communicated with the top of the liquid storage tank.

In some embodiments, the direction perpendicular to the ground is a vertical direction, along the vertical direction, the liquid inlet is located above the overflow port, the overflow port is located at a connection position between the second tank body and the first tank body, the overflow port is communicated with the top of the liquid storage tank, and the liquid inlet is communicated with the bottom of the liquid storage tank.

In some embodiments, the second tank body is provided with an air inlet, and the height of the air inlet is not less than the height of the liquid inlet along the vertical direction, wherein the direction perpendicular to the ground is the vertical direction.

In some embodiments, a baffle is disposed at an end of the second tank opposite to the first tank, and a connecting rod is disposed on the baffle and penetrates through the baffle to be connected with the adjusting member.

In some embodiments, the connecting rod is provided with a connecting plate, the direction perpendicular to the ground is taken as the vertical direction, a graduated scale is arranged on the baffle along the vertical direction, the ground is taken as a projection surface, and in the projection surface, a gap exists between the baffle and the connecting plate, or the baffle is connected with the connecting plate.

In some embodiments, a rotating wheel is arranged at one end of the connecting rod, which is opposite to the adjusting piece, and a handle is arranged on the rotating wheel.

In some embodiments, the liquid outlet is communicated with a reaction kettle, and the reaction kettle is positioned below the first tank body.

The metering device provided by the utility model has the following beneficial effects:

The volume of the first tank body is regulated through the regulating element, when the liquid volume to be measured is measured, the liquid volume to be measured is firstly determined, the volume of the regulating element which is required to be stretched into the first tank body is obtained through subtracting the liquid volume to be measured from the first tank body, the length of the regulating element which is required to be stretched into the first tank body is calculated, the part of the regulating element which is required to be stretched into the first tank body is stretched into the first tank body through the first opening, the liquid flows into the first tank body from the first opening, a first gap exists between the regulating element and the inner peripheral wall of the first tank body and between the regulating element and the first opening, and the liquid is stored in the first tank body.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. The drawings in the following description are merely exemplary and other implementations drawings may be derived from the drawings provided without inventive effort for a person skilled in the art.

FIG. 1 is a block diagram of a metering device of the present utility model;

FIG. 2 is a schematic view of the operation of a metering device according to the present utility model;

Fig. 3 is a liquid flow diagram of a metering device of the present utility model.

The reference numerals are:

1. The device comprises a first tank body, a liquid outlet, a regulating part, a connecting rod, a second tank body, a graduated scale, a 7 overflow port, a 8 liquid inlet, a 9 liquid inlet, a communication port, a 10 baffle, a 11 rotary wheel, a 12 handle, a 13 connecting plate, a 14 liquid storage tank, a 15 gas inlet, a 16 first part, a 17 second part, a 18 third part, a 19 reaction kettle.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of the present utility model, and the azimuth terms "inside and outside" refer to inside and outside with respect to the outline of each component itself.

Spatially relative terms, such as "above," "upper" and "upper surface," "above" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the process is carried out, the exemplary term "above" may be included. Upper and lower. Two orientations below. The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

Referring to fig. 1-3 in combination, according to an embodiment of the present utility model, there is provided a metering device, which includes a first tank 1, the first tank 1 having a first opening, a liquid outlet 2 being provided at a bottom of the first tank 1, the first tank 1 being configured to hold a liquid, an adjusting member 3, the adjusting member 3 being located above the opening of the first tank 1, and the adjusting member 3 being capable of moving at least partially from the opening to an inside of the first tank 1, and a first gap being provided between the adjusting member 3 and an inner peripheral wall of the first tank 1 and between the adjusting member 3 and the first opening when the adjusting member 3 is located at least partially inside the first tank 1. According to the technical scheme, the volume of the first tank body 1 is regulated through the regulating element 3, when metering, the volume of liquid to be metered is firstly determined, the volume of the regulating element 3 which is required to be metered is obtained by subtracting the volume of the liquid to be metered from the first tank body 1, the volume of the regulating element 3 which is required to be stretched into the first tank body 1 is calculated, the length of the regulating element 3 which is required to be stretched into the first tank body 1 is calculated, the part of the regulating element 3 which is required to be stretched into the first tank body 1 is stretched into the first tank body 1 through the first opening, the liquid flows into the first tank body 1 from the first opening, a first gap exists between the regulating element 3 and the inner peripheral wall of the first tank body 1, the first opening and is stored in the first tank body 1, when the liquid level in the first tank body 1 is full of the same plane with the opening, the liquid is represented by full, the liquid metering is completed, thereby accurately measuring the volume of the liquid, the accuracy of an experiment result, the stability of a production process and the correct preparation of raw materials are ensured, the production efficiency and the process accuracy are improved, the operation is simple, and after the metering is completed, the liquid is not required to be discharged through the liquid outlet 2 after the metering is completed.

In the metering device, the ground is used as a horizontal plane, the direction vertical to the ground is used as a vertical direction, the directions of 'upper', 'lower', 'top', 'bottom', and the like are all directions in the vertical direction, the adjusting piece 3 can be fixed by adopting a hanging rope, a cylinder, and the like, so that the adjusting piece 3 is fixed and the adjusting piece 3 is driven to move, further, the driving device is positioned above the first tank body 1, and preferably, the adjusting piece 3 adopts a cylinder structure.

In the prior art, volumetric metering methods determine the amount of liquid charge by measuring the volume inside a liquid charge vessel. Commonly used measuring tools include measuring cups, measuring tubes, and the like. The method is suitable for the production process that the liquid viscosity is lower, the shape of the feeding container is regular, the internal geometry is simple, in addition, when repeated experiments are carried out, the liquid volume to be measured is unchanged, in the prior art, the scale on the measuring device is required to be observed manually, and when repeated measurements are carried out continuously, errors can be generated in manual observation, so that the measuring precision is low, and the experimental accuracy is influenced.

In the prior art, volumetric metering methods determine the amount of liquid charge by measuring the volume inside a liquid charge vessel. Commonly used measuring tools include measuring cups, measuring tubes, and the like. The method is suitable for the production process that the liquid viscosity is lower, the shape of the charging container is regular, the internal geometry is simple, in addition, when repeated experiments are carried out, the liquid volume to be measured is unchanged, in the prior art, the scale on the measuring device is required to be observed manually, when the toxic and harmful liquid is continuously measured for multiple times, errors can be generated in manual observation, and the toxic and harmful liquid is required to be contacted for multiple times manually, so that the measuring precision is low, and the experimental accuracy is affected.

The toxic and harmful liquid is transported to be several tons, and the toxic and harmful liquid is placed in a large tank, but only a trace amount of liquid is needed for each experiment, a metering cup or a metering tube in the prior art needs to take liquid from the large tank manually for many times, if a liquid level sensor is used for pumping, the liquid level sensor is not well controlled, and residual liquid in the tube can flow into a metering piece after a valve is closed, so that deviation exists.

In some embodiments, the metering device further comprises a second tank body 5, the second tank body 5 is disposed on the first tank body 1, the second tank body 5 has a second opening, the second opening is communicated with the first opening, the regulating element 3 is located inside the second tank body 5, when the regulating element 3 is at least partially located inside the second tank body 5, a second gap exists between the regulating element 3 and an inner wall of the second tank body 5 and between the regulating element 3 and the second opening, specifically, a gap exists between the regulating element 3 and the inner wall of the second tank body 5, the bottom surface is taken as a projection surface, the area of the second opening is larger than that of the regulating element 3, the regulating element 3 is located inside the second opening, a second gap exists between the regulating element 3 and the second opening, and a liquid inlet 8 and an overflow 7 are disposed on the second tank body 5. In this technical scheme, overflow port 7 is located the junction of first jar of body 1 and second jar of body 5, through inlet 8, inlet 8 is used for making there is liquid inflow in the second jar of body 5, after liquid gets into in the second jar of body 5, loop through second clearance and first clearance, thereby flow into in the first jar of body 1, accomplish the splendid attire to first jar of body 1, after liquid level in the first jar of body 1 is located the coplanar with first opening, unnecessary liquid can flow out from overflow port 7, at this moment, close inlet 8, after overflow port 7 no longer flows out liquid, indicate that the liquid measurement is accomplished, further, overflow port 7 is located the junction of second jar of body 5 with first jar of body 1, the pipeline that overflow port 7 department connects can adopt transparent pipeline, or, second jar of body 5 adopts transparent material, so that observe overflow port 7's overflow condition, thereby control inlet 8 open or close.

In the metering device of the present utility model, preferably, the first tank 1 has a straight tubular structure, that is, a cylindrical tubular structure, the adjusting member 3 has a cylindrical structure, the adjusting member 3 is located in the first tank 1, the central axis of the adjusting member 3 coincides with the central axis of the first tank 1, and the second opening has the same size as the first opening.

In some embodiments, the metering device further comprises a liquid storage tank 14, the direction perpendicular to the ground is taken as a vertical direction, the height of the liquid storage tank 14 is not greater than the height of the first tank body 1 along the vertical direction, and the liquid inlet 8 and the overflow port 7 are both communicated with the liquid storage tank 14. In this technical scheme, utilize liquid storage pot 14, for providing liquid in the first jar of body 1, inlet 8 and overflow mouth 7 all with liquid storage pot 14 is linked together, has realized the recycle after the liquid overflow, avoids the wasting of resources, and the height of liquid storage pot 14 is not greater than the height of the first jar of body 1 for after the liquid after the overflow flows out from the overflow mouth, in the effect of difference in height, the inflow liquid storage pot 14, the liquid after the overflow of being convenient for collect.

In some embodiments, the second tank 5 is provided with a communication port 9, the communication port 9 is located above the liquid inlet 8, the communication port 9 is communicated with the liquid storage tank 14, and the communication port 9 is communicated with the top of the liquid storage tank 14. In this technical scheme, through the intercommunication mouth 9, when liquid is carried in liquid inlet 8 follow liquid storage tank 14 to first jar body 1, the pressure in liquid storage tank 14 and the first jar body 1 can change, can form the negative pressure in the liquid storage tank 14, can form the malleation in the first jar body 1 for liquid storage tank 14 is linked together with first jar body 1 through intercommunication mouth 9, thereby makes the pressure in liquid storage tank 14 and the first jar body 1 balanced each other, guarantees the transportation stability of liquid.

In some embodiments, the direction perpendicular to the ground is taken as the vertical direction, along the vertical direction, the liquid inlet 8 is located above the overflow port 7, the overflow port 7 is located at the connection position of the second tank 5 and the first tank 1, the overflow port 7 is communicated with the top of the liquid storage tank 14, and the liquid inlet 8 is communicated with the bottom of the liquid storage tank 14. In this technical scheme, inlet 8 is located the top of overflow mouth 7 has guaranteed the overflow effect of overflow mouth 7, overflow mouth 7 is located second jar body 5 with the junction of first jar body 1, overflow mouth 7 intercommunication is in the top of liquid storage pot 14, inlet 8 intercommunication is in the bottom of liquid storage pot 14 has realized the recycle after the liquid overflow, avoids the wasting of resources, and the height of liquid storage pot 14 is not greater than the height of first jar body 1 for after the liquid after the overflow flows out from the overflow mouth, under the effect of difference in height, flow in liquid storage pot 14, be convenient for collect the liquid after the overflow.

In the metering device of the present utility model, preferably, the liquid storage tank 14 has a cylindrical shape, the liquid storage tank 14 has a cover plate, the cover plate can be opened, liquid can be input into the liquid storage tank 14 after the cover plate is opened, and further, the communicating port between the overflow port 7 and the liquid storage tank 14 is provided on the cover plate. A pump body is arranged on a communicating pipe between the liquid inlet 8 and the bottom of the liquid storage tank 14, and liquid in the liquid storage tank 14 is conveyed into the first tank body 1 from the liquid inlet 8 through the pump body.

In some embodiments, the second tank 5 is provided with an air inlet 15, and a direction perpendicular to the ground is taken as a vertical direction, and a height of the air inlet 15 is not less than a height of the liquid inlet 8 along the vertical direction. In this technical scheme, air inlet 15 is used for carrying gas in to second jar body 5 and the first jar body 1, and the gas can adopt nitrogen gas or other gas that have the same effect preferably, through air inlet 15, blows nitrogen gas into in the second jar body 5 to the remaining liquid sweeps to reation kettle on the inner wall of the second jar body 5, the first jar body 1 and each pipeline, ensures the correct preparation and the process accuracy of raw materials.

In some embodiments, a baffle 10 is disposed at an end of the second tank 5 facing away from the first tank 1, a connecting rod 4 is disposed on the baffle 10, and the connecting rod 4 penetrates through the baffle 10 and is connected with the adjusting member 3. In this technical scheme, through the second jar body 5 dorsad the one end of the first jar body 1 is provided with baffle 10, and connecting rod 4 runs through behind the baffle 10 with regulating part 3 is connected, utilizes baffle 10 and connecting rod 4 to fix and drive regulating part 3 displacement, and is preferred, baffle 10 can seal the second jar body 5 dorsad the one end of the first jar body 1 to form the cavity structure in the messenger second jar body 5, the first jar body 1.

In some embodiments, the connecting rod 4 is provided with a connecting plate 13, a direction perpendicular to the ground is taken as a vertical direction, along the vertical direction, the baffle 10 is provided with a graduated scale 6, the ground is taken as a projection plane, and in the projection plane, a gap exists between the baffle 10 and the connecting plate 13, or the baffle 10 is connected with the connecting plate 13. In this technical scheme, but the length in stretching into first jar of body 1 through scale 6 and connecting plate 13 accurate control regulating part 3, regulating part 3 has first position, when regulating part 3 is located first position, the bottom surface and the first opening of regulating part 3 are located same horizontal plane, at this moment, the numerical value on the scale 6 that connecting plate 13 corresponds is zero, when regulating part 3 moves towards first jar of body 1 inside, the numerical value increases gradually to confirm the length that regulating part 3 stretched into first jar of body 1, calculate the volume that regulating part 3 stretched into first jar of body 1 inside.

In some embodiments, the end of the connecting rod facing away from the adjusting member 3 is provided with a turning wheel 11, on which a handle 12 is provided.

In the metering device of the present utility model, preferably, the connecting rod 4 is a screw, the connecting rod 4 is screwed with the baffle 10, and the connecting rod 4 is rotated to move the regulating member 3 upward or downward. The connecting rod 4 is rotated by the turning wheel 11 and the handle 12, thereby driving the regulating member 3 to move upward or downward.

Referring to fig. 2, the first tank 1 may be divided into a first portion 16, a second portion 17 and a third portion 18, where the first portion 16, the second portion 17 and the third portion 18 are sequentially connected, the first opening is located at one end of the first portion 16 opposite to the second portion 17, the first portion 16 is in a truncated cone shape, an area of one end of the first portion 16 opposite to the second portion 17 is smaller than an area of the other end, the second portion 17 is in a cylindrical shape, the third portion 18 is in a conical shape, one end of the third portion 18 facing the second portion 17 is in a circular shape, the liquid outlet 2 is located at one end of the third portion 18 opposite to the second portion 17, and further, the first tank 1 may be integrally configured in a cylindrical shape or in other shapes.

The volumes of the first part 16, the second part 17 and the third part 18 are v1, v2 and v3 respectively, when the graduation gauge is arranged outside the screw rod and is displayed as zero, the adjusting piece 3 adopts a cylindrical structure, the effective volume in the first tank body 1 is v1+v2+v3, and when the graduation gauge is arranged outside the connecting rod 4 and is displayed as h, the effective volume in the first tank body 1 is v1+v2+v3-pi r ² h.

Assuming that the volume of toxic and harmful liquid to be added in the production process is v, calculating the position h of a scale arranged outside the screw according to the formula v1+v2+v3-pi r ² h=v, rotating the rotating wheel 11, and adjusting the height of the connecting rod 4 connected with the adjusting piece 3, so that the position h of the scale is arranged outside the connecting rod 4.

The other monomer storage tanks are toxic and harmful liquid storage tanks and are used for storing toxic and harmful liquid, and the charging can be rapidly weighed by a 20-50 batch metering tank once.

And (3) opening a regulating valve of the conveying pump body and the liquid inlet 8, controlling the flow of toxic and harmful liquid entering the first tank body 1, enabling the toxic and harmful liquid to enter the cavity of the first tank body 1 through the liquid inlet 8, and after the liquid in the first tank body 1 is filled, enabling the redundant toxic and harmful liquid to flow back to the liquid storage tank 14 through the overflow port 7, wherein a sight glass is arranged on a pipeline near the overflow port 7, and the liquid flows out to prove that the liquid in the first tank body 1 is filled.

The regulating valves of the conveying pump body and the liquid inlet 8 are closed, and the whole operation process communication port 9 is opened and communicated with the liquid storage tank 14.

After confirming, opening the liquid outlet 2, putting the metered poisonous and harmful liquid into the reaction kettle 19 through the liquid outlet 2, opening a nitrogen valve of the metering tank when the reaction kettle 19 is seen that no liquid flows in, and purging the metering tank and pipelines from the metering tank to the reaction kettle 19 to ensure the correct preparation of raw materials and process accuracy.

The metering device of the utility model has the advantages that the range of the tank for weighing a small amount of toxic and harmful liquid is between v1+v2+v3-pi r ² h and v1+v2+v3, the specific sizes of the metering cavity and the functional cavity of the metering tank are required to be reasonably designed according to the process requirements, and the larger the length of the cylinder is, the smaller the radius is, the higher the precision of the measured volume of the toxic and harmful liquid is.

In some embodiments, the liquid outlet 2 is communicated with a reaction kettle 19, and the reaction kettle 19 is located below the first tank 1, preferably, a direction perpendicular to the ground is taken as a vertical direction, and along the vertical direction, the reaction kettle 19 is located below the first tank 1, that is, the reaction kettle 19 is located right below the first tank 1. According to the technical scheme, the reaction kettle 19 is located below the first tank body 1 in the vertical direction, so that liquid in the first tank body 1 flows into the reaction kettle 19 under the action of gravity, the liquid is added, the liquid inlet 8 is opened to convey the liquid in the first tank body 1 when the overflow port 7 starts overflowing, the liquid inlet 8 is closed, the liquid outlet 2 is opened to discharge the liquid in the first tank body 1 when the overflow port 7 stops overflowing, the air inlet 15 is opened to blow nitrogen into the second tank body 5 through the air inlet 15 when the liquid outlet 2 no longer flows out of the liquid, and therefore purging of the first tank body 1, the second tank body 5 and the inside of each pipeline is completed, after a period of time, the liquid is specifically sustainable for 10S, the liquid outlet 2 is closed, and at the moment, the metering output of primary liquid is completed. When the reaction is carried out for a plurality of times in the reaction kettle 19 and the required liquid volume is unchanged, the position of the regulating member 3 is kept unchanged, and the operation is repeated.

In the metering device, the pipeline on the liquid outlet 2 can be made of transparent materials so as to observe the real-time condition of the liquid outlet 2, and the liquid outlet 2 is provided with a valve, so that the liquid can be conveyed in the phase reaction kettle 19 under control of opening or closing of the valve.

Those skilled in the art will readily appreciate that the advantageous features of the various aspects described above may be freely combined and stacked without conflict.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model. The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims (10)

1. The metering device is characterized by comprising a first tank body (1), wherein the first tank body (1) is provided with a first opening, the bottom of the first tank body (1) is provided with a liquid outlet (2), and the first tank body (1) is used for containing liquid;

The adjusting piece (3) is positioned above the opening of the first tank body (1), the adjusting piece (3) can move at least partially from the opening to the interior of the first tank body (1), and when the adjusting piece (3) is positioned at least partially in the interior of the first tank body (1), a first gap exists between the adjusting piece (3) and the inner peripheral wall of the first tank body (1) and between the adjusting piece and the first opening, and liquid can flow into the first gap through the opening.

2. The metering device according to claim 1, further comprising a second tank body (5), wherein the second tank body (5) is arranged on the first tank body (1), the second tank body (5) is provided with a second opening, the second opening is communicated with the first opening, the regulating member (3) is positioned inside the second tank body (5), a second gap is reserved between the regulating member (3) and the second opening and between the regulating member and the inner wall of the second tank body (5), and a liquid inlet (8) and an overflow port (7) are arranged on the second tank body (5).

3. The metering device according to claim 2, characterized in that the metering device further comprises a liquid reservoir (14), wherein the liquid inlet (8) and the overflow (7) are both in communication with the liquid reservoir (14).

4. The metering device of claim 3, wherein the second tank body (5) is provided with a communication port (9), the communication port (9) is located above the liquid inlet (8), the communication port (9) is communicated with the liquid storage tank (14), and the communication port (9) is communicated with the top of the liquid storage tank (14).

5. A metering device as claimed in claim 3, characterized in that the liquid inlet (8) is located above the overflow port (7) in the vertical direction, the overflow port (7) is located at the joint of the second tank body (5) and the first tank body (1), the overflow port (7) is communicated with the top of the liquid storage tank (14), and the liquid inlet (8) is communicated with the bottom of the liquid storage tank (14).

6. The metering device according to claim 2, wherein the second tank (5) is provided with an air inlet (15), the direction perpendicular to the ground is taken as the vertical direction, and the height of the air inlet (15) is not smaller than the height of the liquid inlet (8) along the vertical direction.

7. The metering device according to claim 2, wherein a baffle (10) is arranged at one end of the second tank body (5) facing away from the first tank body (1), a connecting rod (4) is arranged on the baffle (10), and the connecting rod (4) penetrates through the baffle (10) and then is connected with the regulating piece (3).

8. The metering device according to claim 7, wherein the connecting rod (4) is provided with a connecting plate (13), a direction perpendicular to the ground is taken as a vertical direction, a graduated scale (6) is arranged on the baffle (10) along the vertical direction, the ground is taken as a projection plane, and a gap exists between the baffle (10) and the connecting plate (13) or the baffle (10) is connected with the connecting plate (13) in the projection plane.

9. The metering device according to claim 7, characterized in that the end of the connecting rod facing away from the adjusting element (3) is provided with a turning wheel (11) on which a handle (12) is arranged.

10. The metering device according to claim 1, wherein the liquid outlet (2) is communicated with a reaction kettle (19), and the reaction kettle (19) is positioned below the first tank body (1).