JPH10196285A - Blocking up releasing method and device for removed earth in small diameter pipe propelling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform work to release blocking-up of earth and sand by sending liquid inside of it from rearward of a casing after a casing rear part is blocked up when the blocking-up of earh and sand is caused in a screw conveyor. SOLUTION: When driving torque of a screw 6c increases since earth and sand are blocked up in a screw conveyor 6 at propelling time, the screw 6c and an intermediate shaft means 23 are connected to each other by a connecting bolt in a condition where a screw driving device is retreated by a propelling jack by a length by which a cap means 20 can be installed. Next, a small diameter jack is extended through a bracket, and the screw driving device is retreated by a necessary length to a propelling device, and after a hexagonal hole 25a is fitted to a hexagonal shaft 23d, the intermediate shaft means 23 and a driving shaft 25 are fastened by the connecting bolt 28. In this way, when fluid is sent in the S direction in a casing 6d of the screw conveyor 6 through the intermediate shaft means 23, the fluid is contained in earth and sand blocked up in the casing 6d, and they get loose, and blocking up can be easily released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for releasing blockage of earth removal in a small-diameter pipe propulsion machine, and more particularly to a method of releasing water from a blockage of earth and sand in a screw conveyor by releasing water. TECHNICAL FIELD The present invention relates to a method and an apparatus for releasing blockage of earth removal in a small-diameter pipe propulsion machine.

[0002]

2. Description of the Related Art A prior art of a method and an apparatus for releasing a blockage of discharged earth in a small-diameter pipe propulsion machine will be described with reference to FIG. The front pipe 1 of the small-diameter pipe thruster comprises a front front pipe 1a having a length of L1 and a rear front pipe 1b having a length of L2 connected to the rear thereof.
a and the rear front conduit 1b are swingably connected via a spherical bearing 1c, and the front front conduit 1a and the rear front conduit 1b
The swinging jack 4 is attached to. Front end pipe 1
A cutter head 3 is rotatably supported by a bearing 2 at the front end of the cutter head 3. Front end conduit 1a and rear end conduit 1b
A screw conveyer 6 penetrates through the center of the screw conveyor 6, and a pinch valve 7 is installed on the outer periphery of the screw conveyer 6 located in the middle of the rear end conduit 1b.

The screw conveyor 6 comprises a blade 6a and a shaft 6
b) and a casing 6d for housing the screw 6c. The front end of the screw 6c is connected to the cutter head 3, and the rear end of the screw 6c is driven by a drive motor 10a which constitutes a screw drive device 10 which can move back and forth on a propulsion device 9 installed in a starting shaft 8. Connected to the speed reducer 10b. The excavated earth and sand is discharged into the starting shaft 8 from the discharging hole 11 at the rear end of the casing 6 d of the screw conveyor 6. The front end of the screw conveyor 6 opens to a chamber 12 formed on the rear surface of the cutter head 3. The front end of the propulsion jack 15 of the propulsion device 9 installed in the starting shaft 8 applies a propulsive force to the buried pipe 5 via the pusher 16. Propulsion is applied to the front conduit 1 by applying propulsion to the rear end of the rear front conduit 1b by the front end of the buried pipe 5. An additive supply port 17 is formed at the rear end of the screw 6c located in the starting shaft 5, and the additive is installed at the tip of the leading conduit 1 through an additive passage (not shown) in the shaft 6b of the screw 6c. Discharge port 18
From the ground and into the chamber 12.

The operation of the above configuration will be described. The shears excavated by the cutter head 3 are taken into the chamber 12 and transported by the screw conveyor 6 into the starting shaft 8 via the pinch valve 7. Squeezing the pinch valve 7 prevents the ground in front of the cutter head 3 from collapsing, or prevents earth and sand from spouting into the starting shaft 5 through the screw conveyor 6 due to groundwater pressure. In a state where the pinch valve 7 is throttled, water flows through the pinch valve 7 into the starting shaft 8. For this reason, earth and sand often consolidate in front of the pinch valve 7, and each time, the screw 6c is rotated forward and reverse to release the blockage of the screw conveyor 6 caused by the solidification of the earth and sand.

[0005]

However, the above-described prior art configurations have the following problems. (1) Each time the screw conveyor 6 is closed, the screw 6c
In order to release the blockage of the screw conveyor 6 caused by the solidification of earth and sand by reversing the forward and reverse directions, a lot of time is required, and the propulsion work efficiency is reduced. (2) Even if the additive is supplied from the additive discharge port 18 at the front end of the screw conveyor 6, it is difficult for the additive to reach the vicinity of the pinch valve 7 where blockage is likely to occur. Time was required and the efficiency of the propulsion work was reduced. (3) If the blockage cannot be released by the above methods (1) and (2), a new shaft must be excavated and the screw conveyor 6 must be disassembled to release the blockage. Huge construction man-hours and costs were required.

The present invention has been made in view of the above problems, and is a small-diameter pipe propulsion capable of efficiently releasing water to a blockage portion of the earth and sand in the screw conveyor 6 to easily release the blockage of the earth and sand. It is an object of the present invention to provide a method and an apparatus for releasing blockage of earth removal in a machine.

[0007]

Means for Solving the Problems and Action / Effect In order to achieve the above-mentioned object, a method for releasing a blockage of earth discharge in a small-diameter pipe propulsion apparatus according to the first invention of the present application is described in detail. In the method of releasing the blockage of the earth discharge in the conveyor 6, when the blockage of the sand occurs in the screw conveyor, after blocking the rear of the casing 6d of the screw conveyor 6, sending the fluid from the rear of the casing 6d into the casing 6d. It is characterized by.

According to the first invention, the screw conveyor 6
When the earth and sand are blocked in the inside, the earth and sand is almost conveyed and discharged by rotation of the blades 6a in the screw conveyor 6 after the closed portion. Utilizing this, the rear of the casing 6d of the screw conveyor 6 is closed, and the casing 6d is closed.
When the fluid is sent into the casing 6d from the rear of d, the soil in the closed portion is loosened by containing the fluid, so that the blocked inside the casing 6d is released. Therefore, the operation of releasing the blockage of the earth and sand in the casing 6d is facilitated, and the operation time for releasing the blockage is reduced, so that the efficiency of the propulsion operation of the small-diameter pipe propulsion machine is improved, and the construction period can be shortened.

According to a second aspect of the present invention, there is provided a method for releasing blockage of earth removal in a small-diameter pipe propulsion machine according to the first aspect of the invention, wherein a screw 6c is rotated while sending fluid into the casing 6d from the rear of the casing 6d. It is characterized by the following.

According to a second aspect, in the first aspect,
While the earth and sand at the closing part in the screw conveyor 6 contains the fluid, the screw 6c is rotated forward or backward or forward or reverse to facilitate mixing of the earth and sand at the closing part with the fluid,
Since the earth and sand adhered to the screw conveyor 6 due to an impact or the like is peeled off, the blockage can be more easily released. Accordingly, the operation of releasing the blockage of the earth and sand in the casing 6d is further facilitated, and the operation time for releasing the blockage is further reduced, so that the propulsion operation efficiency of the small-diameter pipe propulsion machine is greatly improved, and the construction period can be further shortened. .

[0011] A third aspect of the present invention relates to a device for releasing blockage of earth discharge in a small-diameter pipe propulsion machine, which comprises: a casing 6d of the screw conveyor 6; It is characterized by comprising a cap means 20 for closing the rear, and a fluid supply means 22 for sending a fluid into the casing 6d.

According to the third invention, the screw conveyor 6
When the fluid is supplied into the casing 6d by the fluid supply means 22 after the rear of the casing 6d is closed by the cap means 20, since the earth and sand blocking the inside of the screw conveyor 6 contains the fluid, it becomes easy to loosen. The blockage is released. Therefore, the operation of releasing the blockage of the earth and sand in the casing 6d is facilitated, and the operation time for releasing the blockage is reduced, so that the efficiency of the propulsion operation of the small-diameter pipe propulsion machine is improved, and the construction period can be shortened.

In the fourth aspect of the present invention, there is provided a device for releasing blockage of earth discharge in a small-diameter pipe thruster according to the third aspect, wherein a power transmission port is provided in the cap means 20 and a fluid for sending a fluid into the casing 6d. The supply means 22 is provided on the cap means 20.

According to the fourth invention, in the third invention, the screw 6 of the screw conveyor 6 is driven by the drive shaft 25 via the intermediate shaft means 23 passing through the cap means 20.
If c is rotated forward or reverse or forward or reverse to facilitate mixing of the earth and sand in the closed portion with the fluid, the release of the blocked state is further facilitated. Accordingly, the operation of releasing the blockage of the earth and sand in the casing 6d is further facilitated, and the operation time of releasing the blockage is further reduced, so that the efficiency of the propulsion operation of the small-diameter pipe propulsion machine is greatly improved, and the construction period can be further shortened. .

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a small-diameter pipe propulsion apparatus according to an embodiment of the present invention; FIG. FIG. 1 is an enlarged view of a portion P in FIG. 2 showing an embodiment of a device for releasing blockage of earth removal in a small-diameter pipe propulsion machine according to the present invention. FIG. It is a figure which shows one Example of a blockage release apparatus. In the following description, the same members as those of the above-described conventional technology are denoted by the same reference numerals, and the description thereof will be omitted.

The front end 20a of the cap means 20 is connected to the rear end of the casing 6d of the screw conveyor 6.
A seal 21 seals between the casing 6d and the front end 20a. A fluid supply means 22 for supplying water into the casing 6d of the screw conveyor 6 is provided in the cap means 20. An outer diameter portion 23a of the intermediate shaft means 23 penetrates a fitting hole 20b formed in a side wall of the cap means 20, and a seal means 24 seals between the fitting hole 20b and the outer diameter portion 23a. Have been.
In this embodiment, the intermediate shaft means 23 penetrates the side wall of the cap means 20. However, the present invention is not limited to this.
May be configured so that the connection between the intermediate shaft means 23 and the drive shaft 25 is released and the intermediate shaft means 23 is entirely covered. In addition, the fluid supply means 22 is provided on the cap means 20, but the invention is not limited thereto.
It may be installed in.

A hexagonal shaft 6 formed at the rear end of the screw 6c
e is fitted in a hexagonal hole 23b formed in the intermediate shaft means 23, and a bolt hole 6g formed in the hexagonal shaft 6e;
A connection bolt similar to the connection bolt 28 shown by a two-dot chain line is penetrated and connected to a similar bolt hole of a hexagonal hole 23b (not shown). The fitting shaft 6f at the rear of the hexagonal shaft 6e of the screw 6c is fitted with a fitting hole 23 formed in the intermediate shaft means 23.
c, the fitting shaft 6f and the fitting hole 23c.
Are sealed by a seal 29.

A hexagonal shaft 23d formed at the rear end of the intermediate shaft means 23 is fitted in a hexagonal hole 25a formed in the drive shaft 25, and a bolt hole 23e formed in the hexagonal shaft 23d.
A connection bolt 28 shown by a two-dot chain line is connected to a bolt hole of a hexagonal hole 25a (not shown) similar to this. Fitting shaft 23 in front of hexagonal shaft 23d of intermediate shaft means 23
f is fitted in a fitting hole 25b formed in the drive shaft 25, and the fitting shaft 23f and the fitting hole 25b are sealed by a seal 27.

At the center of the intermediate shaft means 23, a drive shaft 25 is provided.
An additive passage 23g communicating with the additive passage 25c formed at the center of the groove is formed. The drive shaft 25 is connected to the output shaft of the speed reducer 10b shown in FIG. In FIG. 1, a pusher 1 is shown for easy understanding of the drawing.
6 is omitted. In FIG. 1, the buried pipe 5 is connected to the starting shaft 8
Is shown propelled to the front wall, but the same applies to any position where the screw conveyor 6 is blocked regardless of the position of the buried pipe 5.

The operation of the above configuration will be described. During the propulsion by the small-diameter pipe propulsion device, when the earth and sand closes in the screw conveyor 6 and the driving torque of the screw 6c increases, as shown in FIG. It is retracted by the propulsion jack 15. In this state, the front end portion 20a of the cap means 20 is connected to the rear end of the casing 6d of the screw conveyor 6, and the hexagonal hole 23b of the intermediate shaft means 23 is fitted to the hexagonal shaft 6e of the screw 6c. The intermediate shaft means 23 is connected with a connecting bolt (not shown).

Next, as shown in FIG. 2, the small-diameter jack 14 mounted on the propulsion jack 15 and the screw driving device 10 is extended via the bracket 13 so that the driving shaft is connected to the hexagonal shaft 23d of the intermediate shaft means 23. 25 hexagonal holes 25a
The screw driving device 10 is retracted with respect to the propulsion device 9 by a length necessary to fit the screw driving device 10. After fitting the hexagonal hole 25a of the drive shaft 25 to the hexagonal shaft 23d of the intermediate shaft means 23, the intermediate shaft means 23 and the drive shaft 25 are tightened by the connecting bolts 28.

After the screw 6c is connected to the drive shaft 25 via the intermediate shaft means 23 as described above, the fluid supply means 2
When the fluid is sent in the direction of the arrow S into the casing 6d of the screw conveyor 6 by means of 2, the fluid is contained in the earth and sand closed in the casing 6d and loosened, and the blockage is easily released.
If the blockage is not released even in this state, the screw 6 is connected to the screw 6 by the screw driving device 10 through the intermediate shaft means 23.
When c is rotated forward or backward or forward or reverse to mix the soil with the fluid in the closed portion, the blockage of the sand is easily released. At this time, the additive supplied from the additive supply port 17 shown in FIG. 2 passes through the additive passages 25c and 23g.
From an additive passage (not shown) formed at the center of the screw 6 c, the additive is supplied to the ground and the chamber 12 from an additive discharge port 18 at the tip of the leading pipe 1. Note that water is usually used as the fluid, but it is needless to say that the fluid is not limited to this.

When it is confirmed that the blockage is released by the driving torque of the screw driving device 10, the fluid supply means 22 and the intermediate shaft means 23
And screw 6c into fitting hole 25a of drive shaft 25.
The normal propulsion work is performed by directly connecting the fitting shafts 6e.

Although not shown, as another embodiment,
When the obstruction of the earth and sand is relatively gentle, the fluid supply means 2 is provided by omitting the intermediate shaft means 23 of the above embodiment and the fitting hole 20b formed in the side wall of the cap means 20.
The clogging of the earth and sand can be released only by supplying water from 2 to the casing 6d.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a device for releasing blockage of earth discharge in a small-diameter pipe propulsion device according to the present invention, and is an enlarged view of a portion P in FIG.

FIG. 2 is a view showing one embodiment of a device for releasing blockage of earth removal in a small-diameter pipe thruster according to the present invention.

FIG. 3 is a diagram showing a blockage release device for discharging earth in a small-diameter pipe propulsion device according to the related art.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... front pipe, 1a ... front front pipe, 1b ... rear front pipe, 1
c: spherical bearing, 2 ... bearing, 3 ... cutter head, 4 ... rocking jack, 5 ... buried pipe, 6 ... screw conveyor, 6a
... blade, 6b ... shaft, 6c ... screw, 6d ... casing, 6e, 23d ... hexagonal shaft, 6f, 23f ... fitting shaft, 6
g, 23e: bolt hole, 7: pinch valve, 8: starting shaft,
9: Propulsion device, 10: Screw drive device, 10a: Drive motor, 10b: Reduction gear, 11: Discharge port, 12: Chamber, 13: Bracket, 14: Small diameter jack, 15: Propulsion jack, 16: Pusher, 17 ... additive supply port, 18 ...
Additive material discharge port, 20: cap means, 20a: front end, 2
0b, 23c, 25b ... fitting holes, 21, 25, 27 ... seals, 22 ... fluid supply means, 23 ... intermediate shaft means, 23a
... shaft outer diameter part, 23b, 25a ... hexagonal hole, 23g, 25c
... additive material passage, 24 ... sealing means, 25 ... drive shaft, 2
6, 28 ... connecting bolts.

Claims (4)

[Claims] In a method for releasing blockage of earth removal in a screw conveyor of a small-diameter pipe propulsion device, when blockage of earth and sand occurs in the screw conveyor, after blocking the rear of the casing of the screw conveyor, from the rear of the casing. A method for releasing blockage of earth removal in a small-diameter pipe propulsion machine, wherein a fluid is sent into a casing. 2. The method according to claim 1, wherein the screw is rotated while feeding fluid into the casing from the rear of the casing. 3. A device for releasing blockage of soil discharged in a screw conveyor of a small-diameter pipe propulsion device, comprising: cap means for closing a casing rear of the screw conveyor; and fluid supply means for sending a fluid into the casing. Discharge release device for earth removal in small-diameter pipe propulsion machines. 4. The small-diameter pipe propulsion device according to claim 3, wherein a power transmission port is provided in the cap means, and a fluid supply means for sending a fluid into the casing is provided in the cap means. Blockage release device.