JP2852525B2 - Underground pipe extraction equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to gas pipes that are no longer needed due to the demolition of houses,
The present invention relates to a device for extracting an underground pipe such as a water pipe by pulling out an underground pipe in a horizontal direction without completely cutting a road surface.

[Conventional technology]

For example, a gas pipe for supplying gas to a general household is a pipe called a supply pipe extending from a book / branch buried underground near the center of the road along a road to an end of a gutter so as to cross the road through a take-out portion. Roads are stretched and are introduced into the home through the underside of gutters.

When removing unnecessary pipes that are no longer needed due to the demolition of houses, etc. Either cut and remove the entire passage from the main / branch outlet to the side of the gutter, or Two roads were excavated at the location where the main / branch was taken out and at the side of the gutter, and both ends of the supply pipe were cut off. The end of the pipe was exposed in the pit excavated at the side where the main / branch was taken out. A pipe pulling device is installed in the pit, the end of the unnecessary pipe is pinched and moved in the horizontal direction to draw out a predetermined length.The drawn pipe is cut with a pipe cutter and discharged to the ground, and the unnecessary pipe is removed again. There has been known a method of repeatedly extracting and cutting out the unnecessary pipes by repeatedly performing an operation of cutting and discharging the same to the ground.

[Problems to be solved by the invention]

the above. However, this method requires much labor, time, and expense, such as excavating the entire road along the unnecessary pipe, extracting the unnecessary pipe, backfilling the road, and paving.

Also, as described above. In the construction method, the entire road is not cut. Although the labor, time and cost can be reduced compared to the method of the above method, it is necessary to make the excavation hole on the side where the main pipe and branch pipe are taken out relatively large, and the unnecessary pipe that is pulled out is cut into small pieces and taken out to the ground. Therefore, there has been a problem that labor and time are required for that, and automation is difficult.

The present invention is particularly directed to the above problems. It was made to solve the problem.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a method for separating an unnecessary pipe 2 from an end of the unnecessary pipe 2 when the existing pipe buried horizontally in the basement becomes an unnecessary pipe 2. A drawing device 1 for exposing an end into a pit 3 excavated from the ground and pulling out and removing the pipe. The pipe drawing device 1 is provided with a side wall 3a of the pit 3 at a front portion of a body frame 4 installed in the pit 3. A front plate 5 having an unnecessary pipe passage opening 5a is provided in opposition to the front plate 5, and a pair of left and right slide support plates 6, 6 is fixed behind the front plate 5 at a predetermined interval, and the slide support plates 6, 6 are fixed. A sliding plate 7 slidable up and down is provided between the front plate 5 and the lower end thereof by a lower end regulating bolt 8, and a piston of a drawing cylinder 9, 9 comprising a pair of left and right hydraulic cylinders is provided on the sliding plate 7. 9a, 9a, and the pulling cylinders 9, 9 Attaching the pipe crushed portion 10 to the distal end portion of the cylinder tube crushable portion 10 has a 2 Tsunoyama portion 11a in side shape at the bottom, vertically adjusted by loosening the fixing screw 11c screw 11
By rotating d, a fixed mold 11 having a bending concave portion 11b that can be adjusted up and down in the range of the gap 11e and that can adjust the upward bending angle when the unnecessary pipe 2 is crushed is fixed. A pressing die 12 having two valleys 12a and two bending valleys 12b corresponding to two ridges 11a and a bending concave part 11b of the fixed die 11 on the upper side opposite to 13 and fixed to the end of the piston 13a.
The tube crushing cylinder 13 is operated to crush and pinch the tube end of the unnecessary tube 2 by the tube crushing portion 10 and at the same time bends the tube end side upward, and in this state, the drawing cylinders 9, 9 Extends in the horizontal direction, pulls out the unnecessary pipe 2 by a predetermined length, releases the holding of the unnecessary pipe 2 by the pipe crushing cylinder 13 in the pulled-out state, and then contracts the drawing cylinders 9, 9 to remove the pipe. The operation of moving the crushing cylinder 13 to the original position is automatically and continuously performed repeatedly by a hydraulic control mechanism.

[Action]

The unnecessary pipe 2 drawn by the pipe drawing device 1 with a substantially constant stroke by the above-described method is bent upward from the crushed and pinched portion, sequentially wound in a spiral shape, and discharged out of the pit 3. As a result of the second extraction operation being performed automatically and continuously, the operation time is shortened and the labor is reduced.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In FIGS. 1 to 3, the pipe drawing device indicated by reference numeral 1 exposes one end of an unnecessary pipe 2 such as a gas pipe which is buried under a road and becomes unnecessary as shown in FIG. The unnecessary pipe 2 is installed in the pit 3 so as to face the unnecessary pipe 2, and the other end of the unnecessary pipe 2 is cut off.

The pipe drawing device 1 is provided with a front plate 5 facing the side wall 3a of the vertical hole 3 at the front portion of the body frame 4, and the front plate 5 has an unnecessary pipe passage 5a and a predetermined space behind. A pair of left and right slide support plates 6, 6 are fixed. A slide plate 7 is provided between the slide support plate 6 and the front plate 5 so as to be vertically slidable. A lower end regulating bolt 8 protruding toward the slide support plate 6 is provided below the slide plate 7 to move up and down. It is provided as possible.

To the slide plate 7, the distal ends of the pistons 9a of the pull-out cylinders 9, 9 each comprising a pair of left and right hydraulic cylinders are fixed. The tube crushing part 10 is attached to the tip of the drawing cylinders 9,9. The tube crushing part 10 is a fixed type having two crests 11a and a concave part 11b for bending in a side shape at a lower part.
11 is fixed, and the fixed mold 11 is
A pressing die 12 having two valleys 12a and bending projections 12b corresponding to the two peaks 11a and bending depressions 11b of the piston 11 is provided with a piston 13a of a tube crushing cylinder 13 composed of a hydraulic cylinder.
It is fixed to the tip. Also, the bending recess 11b of the fixed die 11 can be adjusted up and down in the range of the gap 11e by loosening the fixing screw 11c and rotating the vertical adjusting screw 11d, and adjusts the bending angle when the unnecessary pipe is crushed. It is possible.

Cylinders 9 and 9 for pulling out and cylinder 13 for crushing pipe
Is controlled by a hydraulic circuit shown in FIG. That is, the drawing cylinders 9 and 9 are simultaneously controlled to expand and contract by the solenoid valve 14, and the pipe crushing cylinder 13 is controlled by the solenoid valve.
15 controls the expansion and contraction. Reference numeral 16 denotes a solenoid relief valve that operates in association with control of the solenoid valves 14 and 15.

The solenoid valves 14, 15 and the solenoid relief valve 16 are operated according to a time chart shown in FIG. That is, when the push button switch SW is turned on, first, the solenoid valve 15 is switched and the contracted cylinder 13 for tube crushing is extended and the unnecessary tube 2 is crushed and clamped by the fixed mold 11 and the push mold 12 at the same time. Bending upward, the limit switch LS1 is operated in that state, the solenoid valve 15 is in the neutral state, the solenoid valve 14 is switched to extend the tube withdrawal cylinders 9, 9 and remove unnecessary tubes from the cylinders 9, 9 Pull out only the extension length of. When the unnecessary pipe 2 is pulled out to a predetermined length, the limit switch LS2 is operated and the solenoid valves 14 and 15 are switched to change the solenoid valve 1
4 is in the neutral state, the solenoid valve 15 contracts the cylinder 13 for crushing the pipe to release the holding state of the unnecessary pipe 2, and at this time the limit switch LS3 operates.

The limit switch LS4 switches the solenoid valve 14 to contract the pipe drawing cylinders 9, 9, and the solenoid valve 15 is held in a neutral state. Pipe drawing cylinder 9,9
When is contracted, the limit switch LS4 operates. The limit switch LS4 has the same function as turning on the push button switch SW, and thus one cycle of the operation is completed. Also, the solenoid relief valve 16
Adjusts the pressure of the hydraulic tank in order to stabilize the operation of both valves 14,15. By repeating such a cycle, the unnecessary pipe 2 is continuously drawn. The limit switches LS1 to LS4 may be replaced with pressure switches.

The work cycle of crushing, extracting, crushing release, returning of the crushing portion, and crushing of the unnecessary pipe 2 as described above is performed by a relay (not shown) incorporated in the operation panel 18 of the hydraulic unit 17 shown in FIG. Automatically performed by a timer or the like. In addition,
In FIG. 6, reference numeral 19 denotes a hydraulic hose, which is connected from a hydraulic unit 17 provided on the ground to each hydraulic cylinder of the pipe drawing device 1 installed in the vertical hole 3.

In the pipe drawing apparatus 1 having such a configuration, as shown in FIG. 6, unnecessary pipes 2 such as gas pipes (supply pipes) which have become unnecessary due to the demolition of houses or the like are buried under the road. Used to pull out as it is. First, the unnecessary pipe 2 is cut out from the branch by excavating the pit 3 at a portion branched from the main pipe or the branch pipe buried under the road, and then the unnecessary pipe 2 is placed just before the ditch at the road end near the house. And cut the other end. Then, the tube pulling device 1 is inserted through the unnecessary tube insertion opening 5a of the front plate 5 and the cut end between the fixed die 11 and the pressing die 12 in a state where the cylinder 13 for crushing the tube is contracted. And body frame 4
Is installed so that the bottom portion thereof contacts the bottom surface of the pit 3, and the front plate 5 contacts the side wall 3a.

When the switch SW is turned on in this state, the tube crushing cylinder 13 is extended, and the unnecessary pipe 2 is crushed between the fixed mold 11 and the press mold 12 to form a crushed portion 2c and a withdrawn portion 11b. Is bent upward, and in this state, the pipe drawing cylinders 9, 9
And the unnecessary pipe 2 is withdrawn by the stroke of the piston 9a, and when the withdrawal is completed, the pipe crushing cylinder 13 contracts. The crushed crushed tube 2c is crushed into a wave shape in a side view by the crests 11a and the bent concave portions 11b of the fixed mold 11 and the valleys 12a and the bent convex portions 12b of the press mold 12, and the drawn-out portion is formed. 2b is bent upward by a predetermined angle.

Due to the contraction of the cylinder 13 for crushing the tube, the crushing portion 10 of the tube is lowered by its own weight through the slide plate 7 until the lower end regulating bolt 8 comes into contact with the body frame 4, and the fixed mold 11 is separated from the crushing portion 2c. The pressing die 12 also has a piston 13a of a cylinder 13 for crushing a pipe.
Is separated from the withdrawal portion 2b due to the rise of. In this state, the tube withdrawing cylinders 9, 9 contract, the tube crushing section 10 returns to the original position, and the tube crushing cylinder 13 expands and crushes again.

At this time, since the entire tube crushing portion 10 is lowered (the same is true at the start), when the tube crushing cylinder 13 is extended, the pressing die 12 first hits the upper surface of the drawing portion 2b, and further the cylinder 13 When the tube is extended, the pressing portion 12 comes into contact with the pull-out portion 2b, and the tube crushing portion 10 rises via the slide plate 7 so that the fixed die 11 contacts the lower surface of the pull-out portion 2b and is fixed to the pressing die 12. Type
11 pulls out the extraction 2b. The bending angle of the drawing part 2b can be adjusted up and down in the range of the gap 11e by loosening the fixing screw 11c of the bending concave part 11b of the fixed die 11 and rotating the vertical adjusting screw 11d, so that the bending angle of the drawing part 2b is free. The state of discharge to the outside of the pit 3 can be adjusted.

By repeating such an operation, the operation of pulling out the unnecessary pipe 2 can be automatically performed by operating the operation panel 18. The drawn-out portion 2b is bent one after another from the crushed portion 2c, and is spirally discharged out of the pit 3. The operation panel 18 can be operated manually, and the hole from which the unnecessary pipe 2 is extracted is filled with cement milk or the like.

In the above embodiment, the time required for extracting the unnecessary pipe 2 is, as shown in FIG. 5, for example, when extracting a gas pipe having a diameter of 32 mm, the time required for extracting 150 mm is about 45 seconds, and the time required for extracting 1 m is about 45 seconds. In 5 minutes, the conventional pipe was cut every time the pipe was drawn to a predetermined length, and the pipe was cut out and discharged out of the pit 3. Thus, a considerable time reduction and labor saving were achieved.

〔The invention's effect〕

As described above, according to the apparatus for extracting underground buried pipes of the present invention, the following effects can be obtained.

. The pipe drawing device 1 is provided with a front plate 5 having an unnecessary pipe passage opening 5a facing a side wall 3a of the vertical hole 3 at a front portion of a gas frame 4 installed in the vertical hole 3, and a rear side of the front plate 5. A pair of left and right slide support plates 6 and 6 are fixed at a predetermined distance from each other, and a slide plate 7 slidable up and down is provided between the slide support plate 5 and the lower end by a lower end restriction bolt 8. Therefore, it is easy to install the pipe drawing device 1 in the pit 3, and an efficient pipe drawing operation can be performed.

. The distal ends of the pistons 9a, 9a of the drawing cylinders 9, 9, which are a pair of left and right hydraulic cylinders, are fixed to the slide plate 7, and the pipe crushing part 10 is attached to the leading ends of the drawing cylinders 9, 9, The tube crushing part 10 can be vertically adjusted in the range of the gap 11e by loosening the fixing screw 11c and turning the vertical adjusting screw 11d by loosening the fixing screw 11c, and pressing the unnecessary pipe 2 at the lower side. A fixed mold 11 having a bent concave portion 11b whose upper bending angle when crushed is adjustable is fixed, and two ridges 11a of the fixed mold 11 are provided on the upper side facing the fixed mold 11.
Since the pressing die 12 having the two valleys 12a and the bending convex portions 12b corresponding to the bending concave portions 11b is fixed to the tip of the piston 13a of the tube crushing cylinder 13 composed of a hydraulic cylinder, the unnecessary pipe 2 is provided. By adjusting the upward bending angle when the pipe is crushed by the pipe crushing section 10, an appropriate operation can be continuously performed according to the situation of the pit 3.

. Pull-out cylinders 9, 9 and pipe crushing cylinders 13
The tube crushing cylinder 13 is operated to crush and pinch the tube end of the unnecessary tube 2 by the tube crushing portion 10 and at the same time bends the tube end side upward, and in this state, the drawing cylinders 9, 9 Extends in the horizontal direction, pulls out the unnecessary pipe 2 by a predetermined length, releases the holding of the unnecessary pipe 2 by the pipe crushing cylinder 13 in the pulled-out state, and then contracts the drawing cylinders 9, 9 to remove the pipe. Since the operation of moving the crushing cylinder 13 to the original position is automatically and continuously repeated by the hydraulic control mechanism, the unnecessary pipe 2 buried underground is continuously pulled out and discharged out of the pit 3. be able to. In addition, automation is facilitated because continuous work is possible, and highly efficient work can be performed with less labor.

[Brief description of the drawings]

FIG. 1 is an overall side view showing an embodiment of the present invention, FIG. 2 is a side view of a pipe drawing device, FIG. 3 is a front view thereof, FIG. 4 is a hydraulic circuit diagram, and FIG. FIG. 6 is a side view showing the outline of the working state. 1 ... Pipe drawing device, 2 ... Unnecessary pipe, 3 ... Pit, 4 ...
... body frame, 5 ... front plate, 6 ... slide support plate, 7 ... slide plate, 8 ... falling end regulating bolt, 9 ...
… Pull out cylinder, 10… Pipe crushing part, 11 …… Fixed type, 11a …… Mountain part, 11b …… Bent recess, 12 …… Push type,
12a valley, 12b bending convex, 13 cylinder crushing cylinder, 14, 15 solenoid valve, 16 solenoid relief valve, 18 operating panel, 19 hydraulic hose.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Motoyuki Koga 1-9-18 Nakamachi, Meguro-ku, Tokyo (72) Inventor Minami Nakano 3-18-18 Daikan, Yamato-shi, Kanagawa Prefecture 4 HAKKO Development Technology Research Co., Ltd. (56) References JP-A-63-185541 (JP, A) JP-A-2-292590 (JP, A) JP-A-58-132667 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16L 1/02 E02D 9/02

Claims (1)

(57) [Claims] When an existing pipe buried horizontally underground becomes an unnecessary pipe (2), both ends of the unnecessary pipe (2) are cut off, and a pipe end on one end side of the separated unnecessary pipe (2). Device for exposing and removing a pipe from a ground hole (3) excavated from the ground, wherein the pipe drawing device (1) is provided with a gas frame (4) installed in the pit (3). In the front, the side wall (3a) of the pit (3)
Front plate (5) with an unnecessary pipe passage opening (5a) facing it
And a pair of left and right slide support plates (6, 6) are fixed at a predetermined interval behind the front plate (5), and between the slide support plate (6, 6) and the front plate (5). A slide plate (7) slidable up and down is provided with a lower end regulated by a lower end regulating bolt (8). The slide plate (7) is provided with a pair of left and right hydraulic cylinders (9, 9). The tip of the piston (9a, 9a) is fixed, and the pipe crushing part (10) is attached to the tip of the cylinder of the drawing cylinder (9, 9).
0) can be adjusted up and down in the range of the gap (11e) by turning the up and down adjustment screw (11d) by loosening the fixing screw (11c) and turning the up and down adjustment screw (11d) in the side profile at the bottom. A fixed mold (11) having a bending recess (11b) whose adjustable angle of upward bending when the pipe (2) is crushed is fixed, and a fixed mold (11) is provided on the upper side facing the fixed mold (11). A pressing die (12) having two valleys (12a) and a bending projection (12b) corresponding to the two peaks (11a) and the bending recess (11b) of 11) is inserted into a pipe pressing made of a hydraulic cylinder. Crushing cylinder (1
3) The cylinder (9, 9) for pulling out and the cylinder (13) for crushing the pipe are fixed to the tip of the piston (13a) of (3). At (10), the tube end of the unnecessary tube (2) is crushed and pinched, and at the same time, the tube end side is bent upward. In this state, the drawing cylinder (9, 9) extends in the horizontal direction and the unnecessary tube ( 2)
After pulling out the specified length, release the pinching of the unnecessary pipe (2) by the pipe crushing cylinder (13), and then contract the drawing cylinder (9, 9) to reduce the pipe crushing cylinder. (1
3) A device for extracting underground buried pipes, characterized in that the operation of moving 3) to the original position is automatically and continuously performed repeatedly by a hydraulic control mechanism.