JP2008000683A - Crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten a construction period and to reduce construction cost by easily crushing and removing an existing buried pipe buried in ground. <P>SOLUTION: This crusher 1 is provided at the tip end of a screw pressing a buried pipe into the ground and crushes and removes the existing buried pipes 30 buried in the ground. The crusher 1 is provided with: a rotary disk 2 rotatably provided at the tip end of the screw and advancing integrally with the screw; a driving means 5 rotating the rotary disk 2; at least one crushing bit 10 provided at the front side in the advancing direction of the rotary disk 2, integrally rotatable with the rotary disk 2 and expandable and contractable in the radial direction of the rotary disk 2; at least one crushing cutter 15 provided at the front side in the advancing direction and integrally rotatable with the rotary disk 2 and expandable and contractable in the radial direction of the rotary disk 2; and an expanding and contracting means 20 expanding and contracting the crushing cutter 15 and crushing bit. By cooperation of the crushing bit 10 with the crushing cutter 15, the existing buried pipe 30 is crushed from the axial direction and radial direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a crusher, and in particular, an existing pipe that is provided at the tip of a propulsion unit that press-fits a buried pipe into the ground and lays a pipeline, and is buried in the ground leading the press-fitting of the buried pipe by the propulsion unit. It is related with the crusher effective in crushing and removing.

  There are various types of construction methods for laying pipes by press-fitting buried pipes into the ground.For example, a start shaft is provided in the part of the ground corresponding to the start end of the pipe, and the ground part corresponding to the end is provided. A pit is provided, and a propulsion machine with an excavator at the tip is placed in the start-up pit, and in cooperation with the excavator and the propulsion machine, the buried pipe is laid while excavating the ground from the start-up pit toward the destination pit. There has been known a propulsion method that is configured to lay a series of pipe lines that communicate between a starting shaft and a reaching shaft on the ground by press-fitting (see Patent Document 1).

That is, in the propulsion method described in Patent Document 1, the base end portion of a propulsion pipe (buried pipe) is connected to the propulsion means of the propulsion device provided with the propulsion means composed of a hydraulic cylinder or the like, A propulsion device provided with an excavator comprising an inner pipe, an excavation bit provided at the tip of the inner pipe, a driving means for rotationally driving the inner pipe, etc., and this propulsion device is disposed inside the start shaft, With the cooperation of the excavator and the excavator, by laying a buried pipe while excavating the ground from the starting pit to the reaching pit, a series of conduits communicating between the starting pit and the reaching pit are laid on the ground It is something that can be done.
JP 7-293193 A

  By the way, when laying a pipeline on the ground with the propulsion device configured as described above, there is no problem in laying a new pipeline on the ground, but the existing buried pipe is due to aging of the existing buried pipe, etc. Is replaced with a new buried pipe, the existing buried pipe made of reinforced concrete cannot be crushed and removed by an excavator.

  For this reason, it is necessary to excavate the ground from the ground to remove the existing buried pipe, and then bury a new buried pipe, which requires a lot of labor and time to replace the buried pipe, and the construction period is prolonged. In addition, the construction cost is high.

  The present invention has been made in view of the above-described conventional problems, and when an existing buried pipe is replaced with a new buried pipe by aging or the like, the existing buried pipe is easily crushed and removed. An object of the present invention is to provide a crusher that can shorten the construction period and can significantly reduce the construction cost.

In order to solve the above problems, the present invention employs the following means.
That is, the invention according to claim 1 is a crusher that is provided at the tip of a propulsion unit that press-fits a buried pipe into the ground, and crushes and removes an existing pipe that is buried in the ground. A rotating disk that is rotatably provided at the tip of the machine and that can be propelled integrally with the propulsion machine, a driving means that rotationally drives the rotating disk, and provided in a portion on the front side in the propulsion direction of the rotating disk, At least one crushing bit that can be rotated integrally with the rotating disk and can be expanded and contracted in the radial direction of the rotating disk, and provided in a portion on the front side in the propulsion direction of the rotating disk, can rotate integrally with the rotating disk and rotate At least one crushing cutter that can be expanded and contracted in the radial direction of the board, and expansion / contraction means for expanding and contracting each of the crushing cutter and the crushing bit, and the existing buried pipe by cooperation of the crushing bit and the crushing cutter Characterized by crushing the axial and radial directions.

  According to the crusher according to the present invention, the crushing bit and the crushing cutter are rotated and driven integrally with the rotating disc by rotating the rotating disc by the driving means while propelling the rotating disc by the operation of the propulsion unit. By operating the expansion / contraction means, the crushing bit and crushing cutter expand and contract in the radial direction of the rotating disk, and the existing buried pipe is crushed from the axial direction and the radial direction by the cooperation of this crushing bit and crushing cutter. become.

  The invention according to claim 2 is the crusher according to claim 1, wherein the crushing bit follows the propulsion of the rotating disk by the operation of the expansion / contraction means on the axial end surface of the existing buried pipe. The crushing cutter is configured to abut on the inner surface of an existing buried pipe by expanding and contracting in the radial direction of the rotating disk by the operation of the expansion / contraction means.

  According to the crusher of the present invention, while the rotating disk is propelled by the operation of the propulsion device, the rotating disk is driven to rotate by the driving means, the crushing bit and the crushing cutter are driven to rotate integrally with the rotating disk, and the expansion / contraction means By expanding and contracting the crushing bit and crushing cutter, the crushing bit rotates and contacts the axial end surface of the existing buried pipe, while the crushing cutter rotates and contacts the inner surface of the existing buried pipe, The tube will be crushed from the axial and radial directions.

  The invention according to claim 3 is the crusher according to claim 2, wherein the crushing bit and the crushing cutter expansion / contraction means are provided on the rotating disk so as to be capable of reciprocating in the radial direction, A support portion that supports the crushing cutter, a hydraulic expansion / contraction cylinder that reciprocates the support portion in the radial direction of the rotating disk, a hydraulic supply source, and a hydraulic pipe that connects the hydraulic supply source and the expansion / contraction cylinder. And supplying the hydraulic pressure to the expansion / contraction cylinder via the hydraulic pipe by the operation of the hydraulic pressure supply source, so that the crushing bit and the crushing cutter are expanded and contracted in the radial direction of the rotating disk integrally with the support portion. It is configured.

  According to the crusher of the present invention, by supplying hydraulic pressure from the hydraulic supply source of the expansion / contraction means to the expansion / contraction cylinder via the hydraulic piping, the expansion / contraction cylinder reciprocates in the radial direction of the rotating disk and follows the expansion / contraction cylinder. The support part reciprocates in the same direction, the crushing bit expands and contracts in the same direction as the support part, the existing buried pipe is crushed from the end surface by the crushing bit, and crushes integrally with the support part of other expansion / contraction means The cutter expands and contracts in the same direction, and the existing buried pipe is crushed from the inner surface side by the crushing cutter.

  As described above, according to the crusher of the present invention, the crushing bit and crushing cutter are integrated with the rotating disc by rotating the rotating disc by the driving means while propelling the rotating disc by the operation of the propulsion device. The crushing bit and the crushing cutter are expanded and contracted by the expansion / contraction means, so that the crushing bit rotates and abuts the axial end surface of the existing buried pipe, and the crushing cutter rotates and the inner surface of the existing buried pipe The existing buried pipe is crushed from the axial direction and the radial direction. Therefore, when replacing an existing buried pipe with a new buried pipe, it is not necessary to excavate the ground and remove the buried pipe, and then bury the buried pipe after the removal. The labor required for this can be reduced, the construction period can be greatly shortened, and the construction cost can be greatly reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show an embodiment of a crusher according to the present invention. In this crusher 1, an existing buried pipe 30 buried in the ground is replaced with a new one by aging or the like. The propulsion unit (not shown) used when press-fitting a propulsion pipe (not shown) that is a buried pipe into the ground is used.

  That is, the crusher 1 shown in the present embodiment includes a rotating disk 2 that can be rotated at the tip of the propulsion unit and can be propelled integrally with the propulsion unit, a driving unit 5 that rotationally drives the rotating plate 2, and a rotating disk. A crushing bit 10 provided at 2 and capable of rotating integrally with the turntable 2, and a crushing cutter 15 provided at the turntable 2 and rotatable together with the turntable 2 and capable of expanding and contracting in the radial direction of the turntable 2. It has.

  The propulsion unit is not particularly limited as long as it has a function capable of press-fitting a propulsion pipe that is an embedded pipe into the ground. For example, a propulsion base and propulsion means (propulsion jack, propulsion jack provided on the propulsion base) are provided. Comprising a drive source to be driven).

  Place the propulsion unit in the start shaft provided on the ground, attach the propulsion pipe, which is a buried pipe, to the propulsion unit of the propulsion unit, actuate the propulsion unit, and direct the propulsion pipe toward the reaching pit provided on the ground By propelling, the propulsion pipe is press-fitted into the ground, and a series of conduits that communicate between the start shaft and the arrival shaft are laid on the ground.

  Inside the propulsion tube, an inner tube 27 having a smaller diameter than the propulsion tube is inserted in a state where the axes coincide with each other. The inner end of the inner tube 27 is attached to the propulsion unit together with the propulsion tube. Is pushed together with the propulsion pipe and pressed into the ground. A seal member (not shown) is interposed between the propulsion pipe and the inner pipe 27. The seal member seals between the two, and muddy water or the like acting from the ground side passes through the both sides. Inflow into the basin is prevented.

  The turntable 2 has a disk shape having substantially the same diameter as the outer diameter of the inner tube 27, and is connected to the driving means 5 provided inside the inner tube 27. The tube 27 is configured to rotate around the central axis of the inner tube 27 on the distal end side of the tube 27, and the crushing bit 10 and the crushing cutter 15, which will be described later, are configured to rotate integrally with the rotating disk 2.

  The driving means 5 includes a hydraulic rotary motor 6 provided in the inner pipe 27, a hydraulic supply source 7, a hydraulic pipe 8 connecting the hydraulic supply source 7 and the rotary motor 6, and an output shaft of the rotary motor 6. And a reduction mechanism 9 composed of a plurality of gear trains interposed between the rotary disk 2 and the rotary disk 2 by supplying hydraulic pressure from the hydraulic supply source 7 to the rotary motor 6 via the hydraulic pipe 8. 2 is rotationally driven via the speed reduction mechanism 9, and a crushing bit 10 and a crushing cutter 15, which will be described later, are rotationally driven integrally with the rotating disk 2.

  A crushing bit 10 and a crushing cutter 15 are provided on one side surface of the turntable 2, and the existing embedded pipe 30 is crushed and removed by the cooperation of the crushing bit 10 and the crushing cutter 15.

  A through-hole 2a that penetrates the turntable 2 in the thickness direction is provided in a part of the turntable 2, and an existing installation that is crushed through cooperation of a crushing bit 10 and a crushing cutter 15 described later through the through-hole 2a. The crushed powder of the buried pipe 30 is guided to the inside of the inner pipe 27 and discharged to the start shaft side by vacuum suction or pneumatic feeding through the discharge pipe 28 arranged inside the inner pipe 27.

  The crushing bits 10 are provided at a plurality of locations at predetermined intervals in the circumferential direction on one side surface of the turntable 2 (in this embodiment, at three locations every 120 ° intervals), and the crushing bits 10 are rotated. By rotating and driving integrally with the board 2, the existing buried pipe 30 buried in the ground is crushed from the axial direction.

  Each crushing bit 10 includes a support base 11 integrally provided on one side surface of the turntable 2, a substantially conical main body 12 attached to the tip of the support base 11, and a plurality of stages on the peripheral surface of the main body 12. It comprises a plurality of blade portions 13 provided in the. The main body 12 is attached to the tip of the support base 11 so that the central axis forms a predetermined angle with the central axis of the turntable 2, and the existing buried pipe is provided by a plurality of blades 13 on the peripheral surface of the main body 12. 30 is crushed from the axial direction.

  The crushing cutter 15 is provided at a plurality of locations (120 in the present embodiment) at a predetermined interval in the circumferential direction of the rotating disc 2 in the forward direction of the crushing bit 10 on one side surface of the rotating disc 2. The crushing cutter 15 is rotationally driven integrally with the rotating disk 2 so that the existing embedded pipe 30 embedded in the ground is crushed from the radial direction.

  Each crushing cutter 15 is composed of a disk-shaped main body 16 and a blade section 17 having a substantially triangular cross section provided integrally on the peripheral surface of the main body 16 over the entire circumference. Are provided so as to be able to be expanded or contracted in the radial direction of the rotating disk 2 via an expansion / contraction means 20 described later.

  Each of the crushing bit 10 and the crushing cutter 15 is provided with expansion / contraction means 20, and is provided at a plurality of locations on the one side surface of the rotating disk 2 at predetermined intervals in the circumferential direction (in this embodiment, each 120 ° interval). At three locations). Here, the expansion / contraction means of the crushing cutter 15 will be described. However, a support portion 21 that can reciprocate in the radial direction of the turntable 2 around the center of the turntable 2, and each support portion 21 in the radial direction of the turntable 2. Are provided with a hydraulic expansion / contraction cylinder 22 that reciprocates, a hydraulic supply source 23 that operates each expansion / contraction cylinder 22, and a hydraulic pipe 24 that connects between the hydraulic supply source 23 and each expansion / contraction cylinder 22.

  A crushing cutter 15 is attached to each support portion 21 of the expansion / contraction means 20, and the expansion / contraction means 20 is operated to reciprocate each support portion 21 in the radial direction of the rotating disk 2, thereby integrally with each support portion 21. Each crushing cutter 15 is configured to reciprocate (expand / contract) in the same direction.

  Each crushing cutter 15 is attached to each support portion 21 such that its central axis forms a predetermined angle with respect to the central axis of the turntable 2, and when each crushing cutter 15 is expanded or contracted via each support portion 21 Further, the blade portion 17 of each crushing cutter 15 is configured to abut on the inner surface of the existing buried pipe 30 with a predetermined inclination angle. Each crushing cutter 15 is attached to each support portion 21 so as to be rotatable about the central axis of each crushing cutter 15.

  And in order to crush and remove the existing underground pipe 30 embedded in the ground using the crusher 1 according to the present embodiment configured as described above, the crusher 1 is attached to the tip of the propulsion unit, In this state, the propulsion device is placed in the start shaft of the ground.

  Then, the crushing bit 10 and the crushing cutter 15 of the turntable 2 of the crusher 1 are made to face the existing buried pipe 30 opened in the start shaft, and in this state, the driving means 5 of the crusher 1 is operated, Hydraulic pressure is supplied from the supply source 7 to the rotary motor 6 via the hydraulic pipe 8, the rotary motor 6 is driven to rotate, the rotary disk 2 is driven to rotate via the speed reduction mechanism 9, and the crushing bit 10 is integrated with the rotary disk 2. And the crushing cutter 15 is rotationally driven.

  Then, by operating the propulsion means of the propulsion device, the propulsion pipe and the inner pipe 27 whose base end portions are connected to the propulsion means are propelled in the direction of the existing buried pipe 30 and are provided at the distal end of the inner pipe 27. The rotating disk 2 is integrally driven, the crushing bit 10 is brought into contact with the axial end surface of the existing buried pipe 30, and the crushing cutter 15 is inserted into the existing buried pipe 30.

  Then, the expansion / contraction means 20 is operated to supply hydraulic pressure from the hydraulic supply source 23 to the expansion / contraction cylinder 22 via the hydraulic pipe 24, and the support portion 21 is reciprocated in the radial direction of the rotating disk 2, so that the support portion 21 is integrated. Then, the crushing cutter 15 is expanded and contracted in the radial direction of the rotating disk 2, and the blade portion 17 of the crushing cutter 15 is brought into contact with the inner peripheral surface of the existing buried pipe 30.

In this manner, while the rotating disk 2 is being propelled by the propelling means via the propelling pipe and the inner pipe 27, the crushing bit 10 and the crushing cutter 15 are rotationally driven integrally with the rotating disk 2 by the driving means 5, and the expansion / contraction means By expanding and contracting the crushing cutter 15 in the radial direction of the turntable 2 by 20, the existing buried pipe 30 is crushed from the radial direction and the axial direction in cooperation with the crushing cutter 15 and the crushing bit 10, and the ground after crushing The propulsion pipe, which will be a new buried pipe, will be pressed into the pipe.
The crushed crushed powder in the existing embedded pipe 30 is guided to the inside of the inner pipe 27 through the through hole 2a of the turntable 2, and vacuum suction or air pressure from the inside of the inner pipe 27 through the discharge pipe 28. It will be discharged to the starting shaft by sending.

  In the crusher 1 according to the present embodiment configured as described above, the existing buried pipe 30 is crushed in the radial direction from the inner surface side by the crushing cutter 15, and the existing buried pipe 30 is axially moved by the crushing bit 10. Therefore, even if the existing buried pipe 30 is made of reinforced concrete, it can be easily crushed and removed.

  Therefore, when the existing buried pipe 30 is replaced with a new one, the time, labor, and cost required for the work can be greatly reduced, the construction period can be shortened, and the construction cost can be greatly reduced. Can do.

  In the above description, the crushing bits 10 and the crushing cutters 15 are provided at three locations on the turntable 2. However, the crushing bits 10 and the crushing cutters 15 at two locations or less or four or more locations on the turntable 2 are provided. You may comprise.

It is sectional drawing which showed the whole crusher by this invention. It is a left view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Crusher 2 Turntable 2a Through-hole 5 Drive means 6 Rotation motor 7 Hydraulic supply source 8 Hydraulic piping 9 Deceleration mechanism 10 Crushing bit 11 Support stand 12 Main body part 13 Blade part 15 Crushing cutter 16 Main body part 17 Blade part 20 Expansion / contraction means 21 Support section 22 Expansion / contraction cylinder 23 Hydraulic supply source 24 Hydraulic piping 27 Inner pipe 28 Drain pipe 30 Existing buried pipe

Claims (3)

A crusher is provided at the tip of a propulsion unit that press-fits a buried pipe into the ground, and crushes and removes an existing pipe buried in the ground,
A rotating disk that is rotatably provided at the tip of the propulsion unit and can be propelled integrally with the propulsion unit, a driving means for rotationally driving the rotating disk, and a portion on the front side in the propulsion direction of the rotating disk At least one crushing bit that can rotate integrally with the rotating disk and expand and contract in the radial direction of the rotating disk, and can be rotated integrally with the rotating disk, provided at a front side of the rotating disk in the propulsion direction; At least one crushing cutter that can be expanded and contracted in the radial direction of the rotating disk, and expansion / contraction means for expanding and contracting each of the crushing cutter and the crushing bit, and the existing embedding is performed in cooperation with the crushing bit and the crushing cutter. A crusher characterized by crushing a tube from an axial direction and a radial direction.   The crushing bit expands / contracts in the radial direction of the rotating disk by the operation of the expanding / contracting means, follows the propulsion of the rotating disk, abuts against an axial end surface of an existing buried pipe, 2. The crusher according to claim 1, wherein the crusher is configured to expand and contract in the radial direction of the rotating disk by the operation of the expansion / contraction means and to contact an inner surface of an existing buried pipe. The crushing bit and crushing cutter expansion / contraction means are provided on the rotating disk so as to be capable of reciprocating in the radial direction, a support part for supporting the crushing bit and the crushing cutter, A hydraulic expansion / contraction cylinder that reciprocates, a hydraulic pressure supply source, and a hydraulic pipe that connects the hydraulic supply source and the expansion / contraction cylinder are provided. The crusher according to claim 2, wherein the crushing bit and the crushing cutter are configured to expand and contract in the radial direction of the rotating disk integrally with the support portion.

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