JPH036313B2 - - Google Patents

Description

Detailed Description of the Invention This invention provides a sheath for storing electrical wiring, etc. when a main pipe used as a gas pipe, water pipe, or sewer pipe is excavated and propelled into the ground together with a sheath pipe. This invention relates to a double pipe underground propulsion laying device used when a pipe is excavated and propelled into the ground together with the main pipe inserted therein, and then the sheath pipe is pulled out and recovered.

Next, the present invention will be explained in detail using illustrated examples.

FIGS. 1 and 2 show an example of a sheath tube unit 7 with a guide, in which a sheath tube 8 made of an arc-shaped bent steel tube has two outer surfaces on both sides in the diametrical direction.
A guide tube 9 made of a small diameter steel tube is arranged so as to extend parallel to the axis of the sheath tube and fixed by welding, and one end of the sheath tube 8 and the guide tube 9 is provided with one end of the steel joint tubes 10 and 11. The sides are fitted and fixed by welding.

Figures 3 to 5 show underground propulsion laying of a guided sheath pipe made of a bent pipe and a main pipe made of a bent pipe using a double pipe underground propulsion laying device according to an embodiment of the present invention. It indicates the state in which the
A plurality of guide rollers 13 having semicircular grooves to be fitted into each guide tube 9 of the guide sheath tube unit 7 are mounted on a support frame 1 fixed with its lower part inserted into a shaft 12 on the starting side. The guide rollers 13 attached to the support frame 4 constitute a guide device that guides the sheath tube in a constant propulsion direction while preventing it from rotating.

A front sheath tube clamp 2 that clamps the guide tube 9 in the guided sheath tube is arranged on the upper part of the support frame 1, and the front sheath tube clamp 2 and the support frame 1 are composed of a plurality of hydraulic cylinders. The lower ends of a plurality of struts 14 extending substantially parallel to the tube axis are fixed to a rear sheath tube clamp 4 connected by a sheath tube propulsion jack 3 and arranged above the front sheath tube clamp 2. Furthermore, the strut 14 is inserted into a main pipe clamp 5 disposed on the upper part of the rear sheath pipe clamp 4, and the rear sheath pipe clamp 4 and the main pipe clamp 5 are connected by a main pipe propulsion jack 6 consisting of a hydraulic cylinder. The rear sheath pipe clamp 4, the main pipe clamp 5, and the main pipe propulsion jack 6 are connected to each other.
The main propulsion device is composed of the following.

In addition, in FIGS. 3 and 4, reference numeral 15 indicates a reaction force supporting overhang plate attached to the support frame 1;
6 is a shaft on the reaching side, and 17 is a truck crane.

FIGS. 6 and 7 show the vicinity of the front sheath tube clamp 2, and are arranged at intervals in the vertical direction on both sides of a clamp frame 20 having an opening 19 through which the guided sheath tube 18 is inserted. The intermediate portion of the pair of upper and lower support links 21 is attached to the support shaft 22, and the intermediate portion of the clamp member 23, which has an arcuate groove for clamping the guide tube on the distal end side, is attached to the upper and lower support links 21. Between the proximal ends of the pair of clamp members 23 that are disposed between the ends and are attached by the pivot 24 and sandwich the guide tube 9,
A clamping jack 25 consisting of a hydraulic cylinder is interposed, and the clamping jack 25 is fixed to one of the clamp members 23, and the proximal end portions of the pair of clamp members 23 are connected to a clamp release spring 26.
and the clamp frame 20
Guide rollers 27 that engage with the guide tube 9 are attached to the upper and lower parts of both sides of the clamp frame 20, and a bracket 28 for connecting the sheath tube propulsion jack 3 is fixed to the lower part of the clamp frame 20. .

8 and 9 show the vicinity of the rear main pipe clamp 4, in which the lower ends of a plurality of columns 14 are fixed to the upper part of the clamp frame 29, and the main pipe propulsion jack 6 is connected to the upper part of the clamp frame 29. The bracket 30 is fixed, but the other structure is the same as that of the front sheath tube clamp.

10 to 13 show the vicinity of the main pipe clamp 5, in which a clamp frame 33 having an opening 32 through which the main pipe 31 is inserted is provided with a through hole 34 through which the support column 14 is inserted. A bracket 35 for mounting the main pipe propulsion jack 6 is also integrally provided, and on both sides of the clamp frame 33, a clamp member 36 having an arcuate groove for holding the main pipe and a main pipe supporting roller 37 are provided. The attached roller support members 38 are fitted so that they can move forward and backward toward the main pipe 31, respectively, and
The clamp member 36 and the clamp frame 33 are connected by a clamping jack 39 consisting of a hydraulic cylinder, and the roller support member 38 and the clamp frame 33 are connected to each other by a hydraulic cylinder 40 for moving the roller.
are connected by. Further, the clamp member 36 and the clamp frame 33 are
A spring receiving member 50 is locked to the end of a support rod 49 which is connected by a tension spring 48 that pulls the rope in the release direction and is further fixed to the rope support fitting 38.
A compression spring 51 that presses the roller support fitting 38 away from the main pipe 31 is fitted into the support rod 49 between the clamp frame 33 and the spring receiving member 50.

When the guided sheath pipe unit 7 made of the bent pipe and the main pipe unit 41 made of the bent pipe are sequentially and alternately connected by welding or the like and propelled underground, a sludge removal unit with a built-in motor is installed at the front end of the main pipe. A hydraulic motor 44 is attached to rotate a bit 43 having a diameter larger than the maximum diameter of the pump 42 and the guided sheath tube, and each guide tube 9 in the guided sheath tube 18 is supported by a plurality of guide rollers 13, respectively. Main 3
1 is supported by a sheath pipe 8 via a slide guide 45, and is further injected into the shaft 12 on the starting side, and the space between the sheath pipe and the main pipe is kept full of water, and muddy water containing excavated earth and sand is poured into the shaft 12 on the starting side. is discharged into a tank 47 on the ground by a mud pump 42 via a mud drainage hose 46.

When propelling the guided sheath tube 18, the main tube clamp 5 is released, and the guide tube 9 in the guided sheath tube is clamped by the front sheath tube clamp 2, and in this state, the sheath tube propelling jack 3 is shortened. be done.

When the main pipe 31 is to be propelled, the front sheath pipe clamp 2 is released, the guide pipe 9 in the guided sheath pipe 18 is held by the rear sheath pipe clamp 4, and the main pipe 31 is moved by the main pipe clamp 5. is clamped, and in this state, the main pipe propulsion jack 6 is shortened.

When carrying out this invention, the front sheath tube 2 and the rear sheath tube clamp 4 may be structured to clamp the sheath tube 8 without clamping the guide tube 9. A protrusion is integrally provided, and the protrusion is fitted into an engagement recess provided in a clamp member of the main pipe clamp to prevent rotation and axial movement of the main pipe clamp relative to the main pipe. It may be fixed.

The above embodiment is an example in which the present invention is laid using a main pipe and a sheath pipe made of a curved pipe, but this invention is laid in a straight line using a main pipe and a sheath pipe made of a straight pipe. It can also be carried out in some cases.

According to this invention, the sheath tube unit 7 with a guide, which is formed by fixing the guide tubes 9 extending in the longitudinal direction of the sheath tube, to the outer surfaces of both sides in the diametrical direction of the sheath tube 8 is connected, and the sheath tube 18 with a guide is configured. The main pipe unit 41 inserted into the guide sheath pipe 18 is connected to form the main pipe 31, and the support frame 1
A guide device is provided to guide the guided sheath tube 18 in a fixed propulsion direction without rotating it, and the front clamp 2 that clamps the guided sheath tube 18 and the support frame 1 are connected to the guided sheath tube 18. A rear clamp 4 that is connected by a propulsion jack 3 and clamps a guided sheath tube 18 behind the front clamp 2, and a guided sheath tube 1.
Since the main pipe clamp 5 that clamps the main pipe 31 protruding from the rear end of the main pipe 8 is connected by the main pipe propelling jack 6, the guided sheath pipe 18 is held between the front sheath pipe clamp 2. By operating the sheath tube propulsion jack 3 in the propulsion direction, the guide device propels the guided sheath tube into the ground while guiding it in a constant propulsion direction without rotating the sheath tube. Furthermore, while the guided sheath tube 18 is being held between the rear sheath tube clamps 4 and the main tube 31 is being held between the main tube clamps 5, the main tube propulsion jack 6 is operated in the propulsion direction. Accordingly, main 3
1 can be propelled without rotating relative to the guided sheath tube 18. Therefore, the sheath tube unit and the main tube unit can be connected alternately, using a simple, small and lightweight device, and with simple operation. Furthermore, the main pipe propulsion device consisting of the rear sheath pipe clamp 4, main pipe clamp 5, and main pipe propulsion jack 6 is separated from the support frame 1, making it easy to carry. It is easy to attach and detach the guided sheath tube 18 and the main tube 31, and even if the guided sheath tube unit and the main tube unit have arbitrary lengths, it can be accommodated, so advantages such as convenience can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an example of a sheath tube with a guide;
FIG. 2 is an enlarged sectional view taken along the line A-A. Fig. 3 is a vertical cross-sectional side view showing a state in which a double pipe underground propulsion installation is being carried out using the double pipe underground propulsion installation device according to an embodiment of the present invention, and Fig. 4 shows a part of it. FIG. 5 is an enlarged longitudinal sectional side view, and FIG. 5 is a lateral plan view showing the tube guide portion. Fig. 6 is a partially longitudinal side view showing the vicinity of the front sheath tube clamp, Fig. 7 is a partially transverse plan view thereof, Fig. 8 is a partially longitudinal side view showing the vicinity of the rear sheath tube clamp, and Fig. 9 is a partially longitudinal side view showing the vicinity of the rear sheath tube clamp. It is a partially cross-sectional plan view thereof. Figures 10 to 13 show the vicinity of the main pipe clamp, and Figure 10 is a partially longitudinal side view showing the state in which the main pipe is gripped by the main pipe clamp;
Fig. 11 is a cross-sectional plan view of the same, Fig. 12 is a partially vertical side view showing the state in which the main pipe is supported by the main pipe supporting rollers after the main pipe clamp is released, and Fig. 13 is a partial longitudinal side view showing the main pipe support roller. FIG. In the figure, 1 is a support frame, 2 is a front sheath tube clamp, 3 is a sheath tube propulsion jack, 4 is a rear sheath tube clamp, 5 is a main tube clamp, 6 is a main tube propulsion jack, and 7 is a sheath with a guide. Pipe unit, 8 is a sheath tube, 9 is a guide tube, 13 is a guide roller, 14 is a strut, 15 is a reaction force support projecting plate, 18 is a sheath tube with a guide, 20 is a clamp frame, 21 is a support link, 22 is a support shaft, 23 is a clamp member, 24 is a pivot, 25 is a clamping jack, 27 is a guide roller, 29 is a clamp frame, 31 is a main pipe, 33
is a clamp frame, 36 is a clamp member, 37
is the main support roller, 39 is the clamping jack, 4
0 is a hydraulic cylinder for moving the rollers, 42 is a mud removal pump, 43 is a bit, and 44 is a hydraulic motor.

Claims (1)

[Claims] 1 Guided sheath tube unit 7 configured by fixing guide tubes 9 extending in the longitudinal direction of the sheath tube to both outer surfaces in the diametrical direction of sheath tube 8 is connected to constitute guided sheath tube 18, and the guided sheath tube 18 is configured. The main pipe unit 41 inserted into the sheath pipe 18 is connected to the main pipe 3.
1 is constructed, and the support frame 1 is provided with a guide device that guides the guided sheath tube 18 not to rotate and in a constant propulsion direction, and a front clamp 2 that clamps the guided sheath tube 18 and the support frame. 1 refers to the sheath tube propulsion jack with guide 3
a rear clamp 4 that clamps the guided sheath tube 18 rearward of the front clamp 2; and a main tube clamp 5 that clamps the main tube 31 protruding from the rear end of the guided sheath tube 18.
A double pipe underground propulsion laying device characterized by being connected by a main pipe propulsion jack 6.