JP3793604B2 - Wastewater treatment structure of boring equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a drainage treatment structure of a boring device that discharges drilling fluid and cuttings to the ground with compressed air.
[0002]
[Prior art]
Conventionally, with regard to the wastewater treatment structure of a boring device, for example, in an air reverse circulation boring device, cutting air composed of pressured air, a drilling fluid, excavated earth, sand, and stones is discharged without separation. .
For this reason, there is a possibility that drainage or the like blows up to the ground and causes problems such as environmental pollution.
[0003]
[Problems to be solved by the invention]
This invention was created based on the above circumstances, and its main problem is
The object is to provide a drainage treatment structure for a boring device that separates air and cuttings from water and cuttings discharged together with high-pressure air and eliminates the effects of pressure, and then separates them into water and cuttings. .
[0004]
[Means for Solving the Problems]
In order to solve this problem, in the invention of claim 1,
In the drainage treatment structure of a boring device that discharges drilling fluid and cuttings to the ground with air pressure,
A discharge pipe connected to a boring device and guiding a three-phase flow of drilling fluid, cuttings and air to the discharge port side;
A substantially cylindrical shape that is formed at the tip of the discharge pipe and has an abutting body for abutting the discharged three-phase flow on the upper side, and an opening for discharge on the lower side to depressurize the three-phase flow. A discharge port,
An exhaust part that is formed on a cover that covers the exhaust port part and guides and exhausts air discharged from the exhaust port part;
A solid-liquid separator that is disposed below the discharge port, receives water and cuttings discharged from the discharge port, separates water and cuttings, and separates and discharges the separated water and cuttings. The technical means consisting of
In the invention of claim 2,
The discharge port is formed in a substantially cylindrical shape, has an inner diameter larger than that of the discharge pipe, and is provided with a swash plate that collides the three-phase flow on the upper end of the discharge port. Technical measures are taken to make it an opening.
Furthermore, in the invention of claim 3, the solid-liquid separation device includes a sieve that is inclined downward toward the discharge side, a vibration device that vibrates the sieve, a drain tank provided at a hanging position of the sieve, a lower end of the sieve, and Technical measures are taken that the cuttings storage section is provided in the extending direction.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the waste water treatment structure for a boring apparatus according to the present invention will be described below with reference to the drawings.
FIG. 1 shows an embodiment of a wastewater treatment structure for a boring apparatus according to the present invention. The drainage treatment structure of this boring apparatus is connected to the boring apparatus 1 and guides a three-phase flow pressurized by air by mixing the drilling fluid generated in the boring operation and cuttings such as earth and sand and rocks to the discharge port side. For example, a hose 3 as a discharge pipe, a pipe-like large-diameter pipe portion 5 connected to the downstream end of the hose 3 via a discharge control valve 4 and having an inner diameter larger than that of the hose 3, and the large diameter A discharge port portion 6 connected to the distal end of the conduit portion 5, and a solid-liquid separator (a sieve 7a provided with a vibration device 7b, a drain tank portion 8, and a cuttings storage portion) disposed below the discharge port portion 6. 9).
[0006]
Here, an example of the boring device 1 is of a rotary percussion type, has an outer bit 10 and an inner bit 11, and is provided with a swivel 12 at the top, and the swivel 12 is connected to an air pump. The air supply port 13 and the discharge port 2 have a known configuration.
[0007]
Since this boring apparatus 1 employs an air reverse circulation system, high-pressure air is supplied from the air supply port 13 to one hollow portion of the double pipe, and the three-phase flow generated as a result of excavation is double pipe. It rises through the other hollow part and is discharged from the discharge port 2.
[0008]
The discharge control valve 4 is provided to control the flow of the three-phase flow that flows from the hose 3 to the large-diameter pipe section 5 and the discharge port section 6.
However, in the present invention, the discharge control valve 4 may be omitted, and the hose 3 and the large-diameter pipe portion 5 may be directly connected.
The large-diameter pipe portion 5 has an inner diameter larger than that of the hose 3 and is provided to decelerate (depressurize) the three-phase flow flowing from the hose 3.
[0009]
As shown in FIG. 2, the discharge port portion 6 of this embodiment is formed in a substantially cylindrical shape, has an inner diameter set larger than that of the large-diameter conduit portion 5, and extends from the large-diameter conduit portion 5 to the upper end of the tip. A swash plate 17 that collides the discharged three-phase flow is provided to form an abutting body, and the lower side is notched from the midway position to the tip to form an opening 16.
Accordingly, the discharge port portion 6 further reduces the pressure of the three-phase flow flowing in from the large-diameter pipe portion 5 and easily discharges it through the opening portion 16.
[0010]
In this embodiment, a cover 15 is provided to cover the side and upper side of the discharge port 6.
The cover 15 is formed as an open portion 18 whose lower side is fully open, and drops the mixture of the discharged fluid and the cuttings discharged from the discharge port portion 6 onto the sieve 7.
[0011]
On the other hand, the cover 15 has an exhaust passage portion 19 formed on the upper side, and guides and exhausts the air discharged from the discharge port portion 16.
The exhaust flow passage portion 19 of this embodiment has a passage that is folded back in a zigzag manner, and the tip is opened facing the atmosphere.
Therefore, since air is discharged through the exhaust passage portion 19 formed in a zigzag shape, rainwater or wind does not flow back into the cover 15 and enter.
[0012]
Next, the solid-liquid separator receives the mixture of the discharged fluid discharged from the discharge port 6 and the cuttings, and sifts it into water and the other (cuttings, etc.) It is provided to separate and discharge cuttings and the like.
The solid-liquid separator of this embodiment includes a sieve 7a that is inclined downward to the discharge side, a vibration device 7b that vibrates the sieve 7a, a drain tank 8 provided at a hanging position of the sieve 7a, and a lower end of the sieve 7a. And a cuttings storage portion 9 made of, for example, a sand bag provided in the extending direction thereof.
Therefore, the cuttings and the like slide down along the inclined surface of the sieve 7 a and are discharged toward the cuttings storage unit 9.
Further, the water flows down to the drainage tank unit 8 through the mesh of the sieve 7a.
[0013]
According to the drainage treatment structure of the boring device configured as described above, the three-phase flow discharged by the boring is separated into each phase as described below.
Air is supplied to one of the double pipes from the air supply port 13 of the boring apparatus 1, and the drilling fluid and cuttings generated in the boring operation are pushed up through the other of the double pipes with high-pressure air and discharged.
[0014]
The three-phase flow is discharged from the discharge port 2 of the boring device 1 through the hose 3, then decelerated by the large-diameter pipe portion 5 having an inner diameter larger than that of the hose 3 through the discharge control valve 4, and then further increased in diameter. The vehicle is decelerated at the discharge port portion 14 having an inner diameter larger than that of the path portion 5, collides with the abutting body 17 by the air force, and falls from the opening portion 16.
The air is guided along the zigzag exhaust channel 19 provided in the cover 15 and rises, and is released into the atmosphere.
[0015]
On the other hand, the mixture of water and cuttings dropped from the opening 16 of the discharge port 14 is received by the sieve 7a.
Then, the water and the cuttings are separated by the sieve 7a vibrating by the vibration device 7b7, and the cuttings slide down along the inclined surface of the sieve 7a, and the cuttings storage unit 9 disposed in the extending direction is inserted. Be contained.
Further, the water flows down through the mesh of the sieve 7 a and is stored in the drain tank unit 8.
[0016]
Next, FIG. 3 shows a wastewater treatment structure of a different embodiment.
In this wastewater treatment structure, the discharge control valve 4 is omitted, and the hose 3 is directly connected to the large-diameter pipe section 5.
The sieve 7a is not provided with the vibration device 7b.
Other configurations are the same as those in the above embodiment.
In this case, the cuttings accumulated on the sieve 7a may be slid naturally by the inclined surface of the sieve 7a or may be slid manually.
[0017]
Next, in the above embodiment, the abutting body is for hitting a mixture of water and cuttings discharged by high-pressure air, and is formed integrally with the discharge port, but is separated in the extending direction of the discharge port. It may be provided. The abutting body may be one held by the cover or one using the wall surface of the cover. In short, it is only necessary to provide a means for colliding the discharged three-phase flow temporarily and reducing the discharge pressure.
[0018]
In this embodiment, the sieve is vibrated by the vibration device. However, the sieve may be moved by swinging or rotating, or the structure for moving the sieve may not be provided.
The structure of the sieve is not particularly limited as long as it can separate only water from the mixture.
In addition, the sieve may be moved or tilted so that the discharged material sieved on the sieve can be discharged at a desired position. Thus, the solid-liquid separator is not limited to the present embodiment as long as it separates water from the mixture of water and cuttings, and separates and discharges each.
Of course, various design changes can be made without departing from the scope of the present invention.
[0019]
【The invention's effect】
According to the drainage treatment structure of the boring device of the present invention, the three-phase flow composed of the drilling fluid, cuttings and high-pressure air discharged from the boring device collides with the abutting body of the discharge port portion to influence the air pressure. Exclude. Then, the air is exhausted, and the drilling fluid and the cuttings are separated into water and cuttings by a solid-liquid separation device and separated and processed.
[Brief description of the drawings]
FIG. 1 is an overall front view of an embodiment of a wastewater treatment structure for a boring device according to the present invention.
FIG. 2 is a perspective view of a discharge port portion of FIG.
FIG. 3 is an overall front view showing different embodiments of the waste water treatment structure.
[Explanation of symbols]
1 Boring device 2 Discharge port 3 Hose (discharge line)
5 Large-diameter pipe section 6 Discharge port section 7a Sieve 7b Vibration device 8 Drain tank section 9 Cuttings storage section 15 Cover 16 Opening section 17 Joint 19 Exhaust flow path section

Claims (3)

In the drainage treatment structure of a boring device that discharges drilling fluid such as water and cuttings to the ground with air pressure,
A discharge line connected to a boring device and guiding a three-phase flow of drilling fluid, cuttings and high-pressure air to the discharge port side;
A substantially cylindrical shape that is formed at the tip of the discharge pipe and has an abutting body for abutting the discharged three-phase flow on the upper side, and an opening for discharge on the lower side to depressurize the three-phase flow. A discharge port,
An exhaust part that is formed on a cover that covers the exhaust port part and guides and exhausts air discharged from the exhaust port part;
A solid-liquid separator that is disposed below the discharge port and receives the drilling fluid and cuttings discharged from the discharge port, separates water and cuttings, and separates and discharges the separated water and cuttings. A wastewater treatment structure for a boring device, characterized by comprising:   The discharge port is formed in a substantially cylindrical shape, has an inner diameter larger than that of the discharge pipe, and is provided with a swash plate that collides the three-phase flow on the upper end of the discharge port. The boring waste water treatment apparatus according to claim 1, wherein the boring waste water treatment apparatus is an opening.   The solid-liquid separator includes a sieve that is inclined downward to the discharge side, a vibration device that vibrates the sieve, a drain tank that is provided at a position where the sieve is suspended, a lower end of the sieve, and a cuttings provided in an extending direction thereof. The drainage treatment structure for a boring device according to claim 1, wherein the drainage treatment structure comprises a storage portion.

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