JP2003120164A - Dust collection device for excavation - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To efficiently remove dust generated at the time of drilling in a tunnel to improve the working environment and efficiently remove excavated soil generated due to drilling. SOLUTION: An earth removal dust catcher having a drill insertion portion for inserting a drilling drill, and having a discharge part for capturing and discharging excavated soil and dust generated by the drill, and an earth removal collector. It has a connecting part to a discharge part of a dust catcher, and has an ejector part which injects compressed air supplied from the outside in a direction opposite to the discharge part, and a dust collecting collector which catches dust by an air flow ejected from the ejector part. A compressed air injector that sucks and removes excavated soil and the like through a discharge section, a compressed air supply device that communicates with the compressed air injector, and air that is connected to the discharge section of the compressed air injector and is compressed by the compressed air injector. A first hose member that conveys excavated soil by a flow, a cyclone separator that communicates with the first hose member and discharges excavated soil, a second hose member that communicates with the cyclone separator and conveys dust, Contact two hose members, powder And a dust collector for collecting dust.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting apparatus for treating dust and excavated soil generated when drilling holes in a tunnel.

[0002]

2. Description of the Related Art Auxiliary construction methods such as reinforcing bar insertion work are generally used in places where the face is not self-sustaining during tunnel construction, such as in a poor ground. In the reinforcing bar auxiliary method, it is necessary to drill a small diameter hole in the tunnel. Then, compressed air or water is used as a medium for carrying out the earth and sand generated by drilling to the outside of the hole.

[0003]

However, when water is used as a medium, in a volcanic area where rocks are remarkably altered,
Rocks often absorb water and expand, making it impossible to drill holes. On the other hand, when compressed air is used as the medium, there is no adverse effect as in the case of using water, but the tunnel fills with dust and the working environment becomes significantly worse. In addition, excavated soil is discharged to the work point due to the drilling, but this excavated soil must also be carried out separately.

In order to remove dust, a dust collector is brought into the work area for purification, but the dust collector and the boring machine are separate devices, and the suction port of the dust collector is installed close to the dust source. Therefore, the dust in the tunnel cannot be removed efficiently. Therefore, the poor working environment has not been improved yet. Furthermore, the dust collector only removes dust and does not carry out the excavated soil.

When drilling with a rock drilling machine, dust is removed by the air pressure discharged from the rock drilling machine, as in the dust collecting and rocking machine disclosed in JP-A-6-33678. It is known to carry entrapped air. However, in this dust collecting and rock drilling machine, all the air pressure discharged from the rock drilling machine cannot be effectively used for carrying, and the carrying distance is limited.

Therefore, it is difficult to apply it when drilling in a tunnel. In addition, when drilling with a rotary percussion drill with a large drilling diameter, it is necessary to discharge soil at the same time, so as with this dust collecting and rock drilling device, let's transport the soil only with the air pressure used for drilling. However, there is a problem in that a sufficient conveying force cannot be obtained.

The present invention efficiently removes dust generated during drilling in a tunnel to improve the working environment, and also efficiently excavates excavated soil along with the dust. An object of the present invention is to provide an excavated soil dust collecting apparatus that is well removed.

[0008]

The invention according to claim 1 is
A soil dust collecting catcher having a cone inserting portion for inserting a drilling cone and a discharging portion for capturing and discharging excavated soil and dust generated by the cone, and this soil collecting trap And a discharge part of the container, and an ejector part for injecting compressed air supplied from the outside in a direction opposite to the discharge part, and trapping the dust collection by the air flow ejected from the ejector part. A compressed air injector for sucking and removing the excavated soil and dust in the device through the discharge part, a compressed air supply device that communicates with the compressed air injector, and a discharge part of the compressed air injector, A first hose member that conveys the excavated soil and dust by an air flow by the compressed air injector, a cyclone separator that communicates with the first hose member and discharges the excavated soil, and a cyclone separator that communicates with the cyclone separator. , Carry the dust And a second hose member, contact the second hose member, characterized in that a dust collector for dust collection of the dust.

According to a second aspect of the present invention, in the excavated soil dust collecting apparatus according to the first aspect, the soil dust collecting trap has a skirt portion, which is directed to a surface of a hole to be machined, in the cylindrical portion. It is characterized by that. According to a third aspect of the present invention, in the excavated soil dust collecting apparatus according to the first aspect, the ejector portion has a pipe line that conveys the excavated soil and dust, and a cylinder provided around an outer periphery of the pipe line. It is characterized in that it is constituted by an air reservoir part, a compressed air introduction port provided in the air reservoir part, and an injection part formed between the air reservoir part and the conduit.

According to a fourth aspect of the present invention, in the excavated soil dust collecting apparatus according to the third aspect, the injection portion is formed over the entire circumference of the air reservoir portion. According to a fifth aspect of the present invention, in the excavated soil dust collecting apparatus according to the third aspect, the first hose member is provided with an ejector portion for injecting compressed air supplied from the outside toward the cyclone separator. It is characterized by being formed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the embodiments shown in the drawings. 1 to 5 show an excavated soil dust collecting apparatus 1 according to an embodiment of the present invention (corresponding to claims 1 to 4). The excavated soil dust collecting apparatus 1 according to the present embodiment has a drilling tool (for example, a rod used in a rotary percussion drill) 70 inserted therein, and the drilling tool 2 and dust 3 generated by the tool 70. Soil dust collection trap 10 that captures and discharges the soil, and compressed air that is supplied from the compressor 5 sucks and removes the excavated soil 2 and the dust 3 captured in the soil dust trap 10 and compresses The air ejector 20, the first hose member 30 that conveys the excavated soil 2 and the dust 3 discharged by the compressed air ejector 20, and the excavated soil 2 and the dust 3 that are conveyed through the first hose member 30 are separated. Then, the cyclone separator 40 that discharges the excavated soil 2, the second hose member 50 that conveys the dust discharged from the cyclone separator 40, and the second hose member 5
And a dust collector 60 that collects the dust that is conveyed through the dust collector.

As shown in FIGS. 1 and 2, the soil dust collecting and trapping device 10 has a cylindrical pyramid insertion portion 11 through which the drilling cone 70 is inserted, and excavation generated by the cone 70. Soil 2 and dust 3
And a discharge section 15 for capturing and discharging the. Cone insertion part 1
1 is formed by a cylindrical member 11a having, for example, a substantially truncated cone shape, a cylindrical shape, a truncated pyramid shape, or a rectangular tube shape.

Then, the opening 1 on the side where the cone 70 is inserted
2 has a small hole 12b into which a cone 70 can be inserted with a margin.
A rubber seal member 12a provided with is installed.
The small hole 12b is sealed by a rubber seal member 12a so that the dust 3 does not leak from the small hole 12b. A conical skirt portion 14 for trapping the excavated soil 2 and dust 3 generated by the cone 70 directed to the ground G is attached to the opening 13 on the side of the hole to be ground (ground G). There is. The skirt portion 14 is made of a rubber member, and even if there are some irregularities on the surface of the natural ground G, the skirt portion 14 is deformed following the irregularities and the excavated soil 2 and the dust 3 do not leak from the contact portion. It is like this.

On the other hand, the discharge portion 15 is formed so as to project outward from the side portion 11b side of the cylindrical member 11a constituting the pyramid insertion portion 11. A connecting portion 16 with the compressed air injector 20 is formed at the tip of the discharge portion 15. The compressed air injector 20, as shown in FIGS. 1, 3 and 4,
An upstream pipe body 22 for carrying the excavated soil 2 and the dust 3 having a connecting portion 21 for connecting to the connecting portion 16 of the discharge portion 15 of the discharged dust collecting and trapping device 10, and a tip portion of the pipe body 22 are provided. A downstream-side tube body 26 provided with an annular space 27 between the ejector section 25 and the upstream-side tube body 22 on the tip side of the ejector section 25, and a connecting section provided on the tube body 26. And 28.

The ejector portion 25 is a housing 25a surrounding the outer circumference of the upstream pipe body 22 and the downstream pipe body 26.
An annular air reservoir 25b formed between the housing 25a and the upstream pipe body 22, and the air reservoir 25b.
And the annular space 27, the annular nozzle portion 25c, and the compressed air introduction port 2 provided in the housing 25a.
And 5d.

The annular nozzle portion 25c is provided in the upstream pipe body 2.
2 has a tapered shape and the connecting portion of the housing 25a with the downstream tubular body 26 has a similar tapered shape, so that compressed air flows from the air reservoir 25b toward the annular space 27. Can be jetted. Here, it is desirable that the annular nozzle portion 25c be opened so that the opening direction thereof forms an angle as low as possible with the axial direction of the upstream pipe body 22. For this purpose, as shown in FIGS. 3 and 4, in addition to opening at an obliquely low angle from the side surface, it is also possible to provide a step in the air reservoir 25b and open it in the step surface as shown in FIG. In addition, it is desirable to provide a jet port around the entire inner surface,
For example, it may be a small hole.

When the compressed air is sent to the compressed air injection unit 20, the compressed air is supplied toward the downstream pipe body 26 through the annular nozzle portion 25c, so that the upstream pipe body 2 is provided.
A flow of air toward the downstream is generated in 2 and a negative pressure is generated on the upstream pipe body 22 side. Further, the connecting portion 16
Negative pressure is also generated in the soil dust collecting trap 10 attached via, and a flow of air from the soil dust collecting trap 10 toward the compressed air jetting unit 20 is generated.

As shown in FIG. 1, a compressed air supply hose 6 communicating with the compressor 5 is attached to the compressed air introduction port 25d provided in the housing 25a. The compressor 5 is installed inside or outside the mine where tunnel construction is performed. As shown in FIGS. 1 and 2, a first hose member 30 that communicates with a cyclone separator 40 is connected to the connecting portion 28 of the compressed air injector 20. In the first hose member 30, a flow of air from the compressed air injecting section 20 toward the cyclone separator 40 is generated.

The cyclone separator 40 separates the excavated soil 2 and the air containing the dust 3, and the separated excavated soil 2 is discharged to the outside of the apparatus as it is. The air containing dust separated by the cyclone separator 40 is sent to the dust collector 60 via the second hose member 50, where the dust is filtered,
Clean air is released.

What is sent from the cyclone separator 40 to the dust collector 60 is due to the suction force of the dust collector 60 and the pressure difference generated by the compressed air sent from the compressed air jet section. Since excavated soil and dust are transported by compressed air that is forced to be blown, the transport distance is dramatically longer than that of a dust treatment device installed on a conventional rock drill. In the past, only dust was used for excavated soil, but excavated soil can be transported at the same time.

Next, the operation of the excavated soil dust collecting apparatus 1 according to the present embodiment thus constructed will be described. First, when using the earth-moving dust collecting apparatus 1 according to the present embodiment, a cone 70 such as a rock drill is passed through the small hole 12b of the dust collecting trap 20 to open an opening on the opposite side of the small hole 12b. The skirt portion 14 provided in 13 is addressed to the natural ground G which is going to make a hole.

Next, the compressor 5 is started and compressed air is supplied toward the downstream pipe body 26 through the annular nozzle portion 25c provided in the compressed air injection portion 20. Therefore, a flow of air toward the downstream is generated in the upstream pipe body 22, and a negative pressure is generated on the upstream pipe body 22 side. Further, a negative pressure is generated in the soil dust collecting trap 10 attached via the connecting portion 16 and a flow of air from the soil dust collecting trap 10 toward the compressed air ejecting portion 20 is generated.

When a hole is drilled using a rock drill in such a state, the skirt portion 14 of the discharged dust collecting and trapping device 10 is directed to the natural ground G, so that the excavated soil 2 and dust generated by the hole drilling 3 is collected inside the soil dust collecting trap 10 due to the negative pressure generated inside the soil dust trap 10 and further compressed air is discharged from the inside of the soil dust trap 10 through the discharging portion 15. Injection part 20
The air flows toward the compressed air injection unit 20.

The excavated soil 2 and the dust 3 which have moved to the compressed air injection unit 20 are transferred from the compressed air injection unit 20 to the cyclone separator 4.
By the flow of air toward 0, the air passes through the first hose member 30 and moves to the cyclone separator 40, where it is separated into air containing the excavated soil 2 and the dust 3. The excavated soil 2 is discharged on the spot, but since the first hose member 30 can be lengthened, it is possible to select a discharge place at a place where the excavation work is not hindered and post-treatment is easy. Is.

The air containing the dust 3 is conveyed in the second hose member 50 attached to the cyclone separator 40. The opposite end of the second hose member 50 is attached to the discharged dust collector of the dust collector 60, and the dust-containing air conveyed through the second hose member 50 is filtered by the dust collector 50 to discharge only clean air. It is possible to

In the present invention, in order to convey the excavated soil 2 and the dust 3 to a place apart from the tunnel, a device similar to the compressed air injector 20 is attached to the first hose member 30, so that the conveying distance is increased. Further extension is possible (Claim 5). FIG. 6 shows an excavation soil dust collecting device 80 in which the soil dust collecting trap 10 is attached to the soil discharging swivel 82 of the rotary percussion boring machine 81, and the compressed air injector 20 is attached to the dust collecting trap 10. Show.

In the excavated soil dust collecting apparatus 80 according to this example, it becomes possible to remove dust and slime from the rotary percussion boring machine 81. Although the second hose member 50 and the dust collector 60 are omitted in this example, the air containing dust separated by the cyclone separator 40 is used as in the case of FIG.
Alternatively, the dust may be sent to the dust collector 60 via the filter to filter the dust and release clean air.

Further, the excavated soil dust collecting apparatus 80 shown in FIG.
Then, it is also possible to use it together with the discharged dust collecting and trapping device 10 shown in FIGS. In that case, the excavated soil 2 and the dust 3 are captured through the soil dust collecting and trapping device 10, and the swivel 8
The dust and the slime from the rotary percussion boring machine 81 can be pressure-fed by air by the compressed air injector 20 via 2 respectively.

[0029]

According to the present invention, by forcibly sending compressed air, not only dust can be reliably discharged from the working point, but also excavated soil can be transported. In addition, the transport distance can be dramatically increased as compared with the conventional one, and it becomes possible to easily select the place where the excavated soil is accumulated so as not to interfere with the drilling work. Therefore, it is possible to use not only a rock drill but also a rotary percussion drill having a large drilling diameter.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an excavated soil dust collecting apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing the discharged dust collecting and trapping device of FIG. 1.

FIG. 3 is a perspective view showing a compressed air injecting portion of FIG. 1 with a part thereof cut away.

4 is a vertical cross-sectional view of the compressed air injecting unit of FIG.

FIG. 5 is a vertical cross-sectional view showing another form of the compressed air injecting section.

FIG. 6 is a conceptual diagram showing an excavated soil dust collecting apparatus according to another embodiment of the present invention.

[Explanation of symbols]

1,80 Soil dust collector for excavation 2 excavated soil 3 dust 5 compressor 10 Dust collection trap 11 Cone insertion part 12, 13 opening 14 Skirt 15 Discharge part 20 Compressed air injector 22 Upstream pipe 25 ejector section 25a housing 25b annular air reservoir 25c annular nozzle 25d compressed air inlet 26 Downstream pipe 27 annular space 30 First hose member 40 cyclone separator 50 Second hose member 60 dust collector 70 Drilling tool for drilling 81 Rotary Percussion Boring Machine 82 swivel G Ground

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Akihito Tachikawa             6-22 Matsugaeda-cho, Kita-ku, Osaka City, Osaka Prefecture Japan             Basic Technology Co., Ltd. F-term (reference) 2D065 AB04 CA06 CA07

Claims (5)

[Claims] 1. A soil dust collecting and trapping device which has a conical tool insertion portion for accommodating a conical tool for drilling and also has a discharge portion for catching and discharging excavated soil and dust generated by the conical tool, The ejected dust collecting trap has a connecting portion to the discharge portion and an ejector portion for injecting compressed air supplied from the outside in a direction opposite to the discharge portion. A compressed air injector for sucking and removing the excavated soil and dust in the discharged dust collecting and trapping device through the discharge part, a compressed air supply device which communicates with the compressed air injector, and discharge of the compressed air injector A first hose member connected to the first hose member for conveying the excavated soil and dust by an air flow from the compressed air injector, a cyclone separator that communicates with the first hose member and discharges the excavated soil, and the cyclone. Contact the separator, A second hose member for conveying the serial dust, the contact to the second hose members, dumping dust collector for drilling, characterized in that a dust collector for dust collection of the dust. 2. The excavated soil dust collecting apparatus according to claim 1, wherein the soil dust collecting trap has a skirt portion directed to a surface of a hole to be machined, in the tubular portion. Soil dust collector for excavation. 3. The excavated soil dust collecting apparatus according to claim 1, wherein the ejector portion has a pipe line for conveying the excavated soil and dust, and a cylindrical air provided around the outside of the pipe line. An excavated earth collecting collection characterized by comprising a reservoir, a compressed air inlet provided in the air reservoir, and an injection unit formed between the air reservoir and the conduit. Dust equipment. 4. The excavating soil dust collecting apparatus according to claim 3, wherein the injection unit is formed over the entire circumference of the air reservoir. . 5. The excavated soil dust collecting apparatus according to claim 3, wherein the first hose member is provided with an ejector section for injecting compressed air supplied from the outside toward the cyclone separator. A feature of excavated soil dust collector.