JPH04357296A - Device for crushing underground buried vinyl pipe and for leading new pipe - Google Patents

Abstract

PURPOSE:To cut a vinyl pipe easily, and lay a new pipe easily in a device for crushing an underground buried vinyl pipe and for leading a new pipe. CONSTITUTION:A cutting blade 30 for cutting a vinyl pipe is provided in the front surface of an arm projecting part, which is provided in the side of a cylindrical barrel part having a connection part for connecting a rod pipe 20 to one end thereof and for connecting a new rod pipe 20a to the other end thereof. A device for crushing a vinyl pipe and for leading a new pipe, in which a connection part for connecting a pilot pipe 23 and a hydraulic cylinder head 33 for rolling correction are provided, is provided in the other side of this projecting part. This device is moved to the starting shaft side to crash a buried vinyl pipe and lay a new pipe.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is an underground vinyl pipe crushing/new pipe drawing device for renewing buried vinyl pipes and adding new pipes to positions close to the buried pipes using underground vinyl pipes as a guide. It is related to.

0002

BACKGROUND OF THE INVENTION Conventionally, when renewing underground pipes or installing additional pipes in the vicinity of underground pipes, an open-cut method is often used in which the entire construction section is excavated from the ground. However, this open-cut construction method has problems such as obstruction of road traffic, construction pollution such as noise and vibration, and construction difficulties due to congestion of underground structures. No. 61-241456 (Unexamined Japanese Patent Publication No. 1983-
96382).

FIG. 8 is a diagram illustrating the invention,
In the method of replacing the underground pipe 5 with a new pipe and expanding the pipe to a position close to the underground pipe, the end of the underground pipe 5 exposed in the starting shaft 1 has a pipe axis as shown in FIG. 9(b). A plurality of notches 7 are provided in the direction, and then a rod tube 10 for preventing deviation is attached to the tip of the tube crushing device 8, and a pilot tube 4 is attached to the rear portion, and then the plurality of notches 7 are cut out as shown in FIG. After meshing the notch 7 with a plurality of cutting blades 12 made of special hard steel provided with the pipe crushing device 8 shown in FIGS. The pipe 4 is pushed out in the direction of arrow A in FIG. After the pipe breaking device 8 reaches the reaching shaft 2 while adding the following, the pipe breaking device 8 is removed from the pilot pipe 4. Furthermore, as shown in FIG. 11, a pipe drawing device 14 is attached to the tip of the pilot pipe 4 on the reaching shaft 2 side, and one or more buried pipes 15 are attached to the rear end of the pipe drawing device 14.
The pipe pushing device 3 is operated in the opposite direction to the crushing of the underground pipe 5, and the pilot pipe 4 is pulled into the starting shaft side, thereby sequentially advancing the pipe pulling device 14 and inserting a new pipe into a position close to the crushed pipe 16. A construction method and equipment for laying roads.

[0004] In the apparatus described above, the underground pipeline is crushed by the cutting blade for pipe crushing, and at the same time, the pilot pipe is subsequently laid.However, when crushing steel pipes, etc., the tip of the pipe crushing device is attached to the tip of the pipe crushing device shown in FIG. As shown in the figure, although the cutting blade 12 made of special hard steel is installed, it is necessary to apply an excessive pushing force with the tube pushing device, and therefore a large-scale hydraulic mechanism must be used, which is uneconomical. . In addition, although multiple cutting blades made of special hard steel are installed, if even one of them is missing, stability at the tip of the pipe crushing device will no longer be maintained, and pipe crushing will have to be interrupted. Furthermore, the rod pipe 10 that prevents the tip of the pipe crushing device 8 from slipping off may bite into the step of the joint part 13 of the underground pipe, which has many joints, and not only hinders crushing but also causes sudden damage to the underground pipe. There was a problem in that the reliability of the construction was low, as if there was a bend, the construction had to be interrupted as well. In addition, since the pipeline drawing process is based on soil consolidation without removing soil, changes in the hardness and properties of the surrounding soil may cause rotational twisting of the entire pipe lead-in equipment, causing the buried pipe to be installed subsequently to be in the specified position. There is a problem that it is not buried in the ground.

[0005]

[Problems to be Solved by the Invention] The present invention was proposed in order to improve the above-mentioned drawbacks. , the shape of the tube fracture was made into only one slit-shaped section;
In addition, in order to avoid contact with pipe joints during pipe crushing and to ensure linear followability, a small diameter rod pipe is inserted into the buried pipe before the pipe crushing process to guide the rod pipe. By crushing the buried pipe as a method, the leading part of the buried pipe crushed body does not come into contact with the pipe joint part or the like and interfere with the crushing process. Additionally, if the entire pipe lead-in equipment develops rotational torsion due to changes in the hardness or properties of the surrounding soil during pipe lead-in, this rolling can be corrected, improving construction reliability and reducing construction demand in the future. A device that realizes an economical construction method using a trenchless construction method that does not require digging up the road for renewal of underground pipes in long-distance construction sections that are expected to occur frequently, and construction of pipeline extensions to locations close to underground pipes. The purpose is to provide

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention has a connecting part at the tip for connecting to a rod pipe penetrated inside an existing underground vinyl pipe,
and a cylindrical body having a connection part for attaching a new rod pipe at the rear end, a protrusion provided on a side surface of the body and parallel to the axis, and a protrusion provided on the front surface of the protrusion. , a cutting blade for cutting and crushing the vinyl pipe, a mounting part provided on the side surface of the protruding part for attaching a pilot pipe to the rear part, and a mechanism for correcting rolling during movement and propulsion of the rod pipe. The gist of the invention is an apparatus for crushing underground vinyl pipes and pulling in new pipes, which is characterized by comprising:

[0007]

[Operation] In the present invention, a protrusion is provided on the side surface of the cylindrical body connected to the rod pipe penetrated inside the vinyl pipe, and a cutting blade for cutting the vinyl pipe is provided on the front surface of the protrusion. Since this protrusion is provided, the protruding portion is pulled toward the starting shaft side by the main pushing device, thereby allowing the existing vinyl pipe to be easily cut and a new rod pipe and pilot pipe to be installed.

[0008]

[Examples] Examples of the present invention will be described below. Note that the embodiments are merely illustrative, and it goes without saying that various changes and improvements can be made without departing from the spirit of the present invention.

FIGS. 1 to 4 are diagrams for explaining the construction method, and FIGS. 5, 6, and 7 are diagrams for explaining the embodiment of the present invention,
Figure 5 shows the application to buried vinyl pipes, Figure 6 is a diagram explaining the final process, a method for laying a new pipe in a position close to the underground pipe, and Figure 7 shows a method for correcting rotational twist that occurs when pipes are pulled in. FIG. First, Figure 1~
The construction method of the present invention will be described using FIG. 4 and with reference to FIGS. 5, 6, and 7.

■ As shown in Figure 1, at both ends of the construction section,
A starting shaft 17 and a reaching shaft 18 are constructed (if a manhole is used, it is not necessary to install a shaft), and a main pushing device 19 using hydraulic pressure is installed and fixed in the starting shaft 17. At this time, the central axis direction of the rod pipe 20 and the central axis direction of the buried vinyl pipe 21 are made to coincide. The rod pipe 20 has a diameter smaller than the inner diameter of the buried vinyl pipe 21, has a length that can be carried in from the starting shaft 17, and is of a threaded type with threads cut at both ends. A hydraulic hose 6 comes out from the main pushing device 19, is controlled on the ground, and is inserted into the buried vinyl pipe 21 in the direction of arrow A through the main pushing device 19 as shown in FIG. Penetrate until the tip of the rod tube 20 reaches it.

[0011] As shown in FIG. 2, after attaching the buried vinyl pipe crushing/new pipe pulling device 22 to the end of the rod pipe 20 in the reaching shaft 18, the main pushing device 19 installed and fixed in the starting shaft 17 is , by operating in the direction opposite to the direction of penetration of the rod pipe 20, the buried vinyl pipe crushing/new pipe pulling device 22 is pulled back to the starting shaft 17 side, and at the same time, the buried vinyl pipe is crushed into slits. At this time, as the buried vinyl pipe crushing progresses, the new rod pipe 20a and the pilot pipe 23 are sequentially connected to the rear end of the buried vinyl pipe crushing/newly installed pipe pulling device 22 in the reaching shaft 18. Note that the buried vinyl pipe crushing/newly installed pipe pulling device 22 will be described here using FIG. 5.

FIG. 5 shows a crushed vinyl pipe inserted into the end of a rod pipe 20 that has been penetrated into the inside of the buried vinyl pipe 21 in advance.
It is a diagram with a newly installed pipe lead-in device 22 installed. The buried vinyl pipe crushing/new pipe pulling device 22 has a connecting part 28 for connecting to the rod pipe 20, a connecting part 29 for connecting the new rod pipe 20a to the rear end, and a connecting part 29 for crushing the existing vinyl pipe into slits. A sharp cutting blade 30, an arm-shaped protrusion 31 for installing the pilot pipe 23 in close proximity to the existing vinyl pipe while maintaining a certain distance from it, and an arm-shaped protrusion 31 for correcting the rotational twist angle that occurs when the pilot pipe is drawn in and installed. A hydraulic cylinder part 32, a drilling hydraulic cylinder head 33, and a connecting part 3 for subsequently connecting the pilot pipe 23.
Consists of 4. A new rod pipe 20a and a pilot pipe 2 are installed at the rear end of the buried vinyl pipe crushing/new pipe drawing device 22.
3, as shown in FIG. 2, as the rod pipe 20 is pulled back toward the starting shaft 17, the buried vinyl pipe is crushed into slits by the sharp cutting blade 30, and
A new rod pipe 20a and a pilot pipe 23 are installed following the buried vinyl pipe crushing/newly installed pipe drawing device 22. At this time, a new rod pipe 20a and a pilot pipe 23 are added at the reaching shaft 18 as the pipe crushing progresses.

When the pipe is pulled in using the buried vinyl pipe crushing/new pipe pulling device shown in FIG. 5, the pulling device rotates and twists around the rod pipe 20 due to changes in the soil quality of the propulsion ground. A method for correcting this rotational twist angle will be described here using FIG. 7.

The rotational twist angle (hereinafter referred to as rolling angle) correction mechanism, as shown in FIG. A hydraulic cylinder section 32 integrally attached to the tip of the cylinder section 32, a cylinder head 33 and a control hydraulic hose 39 attached via a guide pipe provided at the head of the cylinder section 32, a hydraulic drive circuit capable of driving the cylinder section 32, and a retractable section. A tachometer 38 is provided at an appropriate position within the body of the device to detect the rotational twist angle during retraction drilling.
and its signal cable 40. The pipe pulling process is performed by activating the original pushing device 19 and pulling the buried vinyl pipe crushing/newly installed pipe pulling device 22 back toward the starting shaft 17, but the drilling in the soil is performed by compaction without removing soil. Therefore, because the properties and hardness of the soil differ depending on the place where it is pulled in, and because the center of gravity of the pull-in device is eccentric, the whole structure is twisted. Therefore, the rotational torsion is measured by the rotation meter 3.
8, and by protruding the hydraulic cylinder head 33 according to the rotational twist angle, the reaction force from the soil by the cylinder head is increased, the attitude of the retracting device 22 is controlled, and the rotational twist is corrected. We are hiring.

■ FIG. 3 shows a device 19 for pushing the rod pipe 20.
While pulling back to the starting shaft 17 side one by one, the new rod pipe 2
0a and the pilot pipe 23 are added at the arrival shaft 18, and the state is shown in which they are drawn up to the starting shaft 17 and installed. Vinyl pipes buried underground throughout the entire construction section.
A new rod pipe 20a is installed at position 1, and a pilot pipe 23 is installed at a certain distance from a position close to the underground vinyl pipe.

■ After the new rod pipe 20a and pilot pipe 23 are installed, as shown in FIG.
At this step, a single pipe drawing device 24 and a multiple pipe simultaneous drawing device 25 are attached to the ends of the new rod pipe 20a and the pilot pipe 23, respectively, and a new buried pipe line 26 is connected to the rear end of the single pipe drawing device 24. In addition, the multiple pipe batch pulling device 25
A new buried pipe 27 is connected to the rear end of the pipe.

FIG. 6 shows a method for connecting a new pipe, a single pipe drawing device 24, and a multiple pipe simultaneous drawing device 25. A single pipe lead-in device 24 is attached to the tip of the new rod pipe 20a, a joint 35 for connecting the new pipe is provided at the rear end, and the new buried pipe 20a is installed.
Connect 6. In addition, a multiple pipe batch pulling device 25 is attached to the tip of the pilot pipe 23 in parallel with the single pipe pulling device 24, and a joint 36 for connecting multiple new pipes is provided at the rear end, and the diameter is equivalent to that of the buried vinyl pipe 21. New buried pipeline 27 with
Connect.

■Finally, as shown in FIG. 4, after connecting the new buried pipes 26 and 27 to the single pipe drawing device 24 and the multiple pipe simultaneous drawing device 25, respectively, the extrusion device 19 in the starting shaft 17 is used to crush the buried pipes. While pulling the new rod pipe 20a and pilot pipe 23 back toward the starting shaft 17 side, one or more new pipes are pulled into the position of the underground vinyl pipe 21 and a position close to this. Lay down. In addition, the new pipe will reach the vertical shaft 1 as the single pipe drawing device 24 and the multiple pipe simultaneous drawing device 25 progress.
8, the connections are made sequentially. In this way, the single pipe pulling device 24 and the multiple pipe simultaneous pulling device 25 reach the starting shaft 17, thereby completing the trenchless renewal and expansion of underground vinyl pipes.

[0019]

[Effects of the Invention] As explained above, the present invention allows renewal of underground pipes and expansion of pipes to positions close to the underground pipes using underground vinyl pipes as a guide, and also achieves high construction reliability. This has the advantage of increasing the reliability of the tube cutting process and solving the problem of correcting the twist angle that occurs when the tube is drawn in, which were problems with conventional devices. Furthermore, since the road is not dug up, it is possible to avoid construction pollution and obstruction of road traffic caused by this, and it is also possible to more economically renew buried steel pipes over long distance construction sections, or to move them to nearby locations. It becomes possible to add more pipelines.

[Brief explanation of the drawing]

FIGS. 1 to 4 are diagrams illustrating the contents of the construction method of the present invention. Figure 1 is a diagram explaining the process of penetrating a rod pipe prior to the crushing process, Figure 2 is a diagram explaining the process of crushing a buried vinyl pipe and drawing in a new pipe, and Figure 3 is a diagram explaining the process of inserting a rod pipe into the pipe prior to the crushing process. FIG. 4 is a diagram illustrating the process of renewing the buried vinyl pipe and installing the pipe to a position near the buried pipe.

FIG. 5 shows an apparatus for crushing buried vinyl pipes and pulling in new pipes according to the present invention.

FIG. 6 shows a method for renewing a buried vinyl pipe and adding a pipe line to a position close to the buried pipe using a pipe line drawing device.

FIG. 7 is a diagram illustrating a method for correcting rotational torsion that occurs when drawing a pipe.

FIGS. 8 to 10 show conventional construction methods.

[Explanation of symbols]

1 Starting shaft 2 Arriving shaft 3 Pipe pushing device 4 Pilot pipe 5 Underground pipe 6 Hydraulic hose 7 Notch 8 Pipe breaking device 10 Departure prevention rod pipe 12 Cutting blade 13 Joint part 14 Pipe pulling device 15 Buried pipe 16 Breaking pipe 17 Starting Shaft 18 Reaching shaft 19 Extrusion device 20 Rod pipe 20a New rod pipe 21 Buried vinyl pipe 22 Buried vinyl pipe crushing/new pipe pulling device 23
Pilot pipe 24 Single pipe drawing device 25 Multiple pipe simultaneous drawing device 26 New buried pipe line 27 New buried pipe line 28 Connection part 29 Connection part 30 Cutting blade 31 Projection part 32 Hydraulic cylinder part 33 Cylinder head 34 Connection part 35 Joint 36 Joint 37 Body 38 Tachometer 39 Control hydraulic hose 40 Signal cable

Claims (1)

[Claims] Claim 1: A cylindrical shape having a connecting part at the tip for connecting to a rod pipe penetrated inside an existing underground vinyl pipe, and a connecting part for attaching a new rod pipe to the rear end. a body, a protrusion provided on the side surface of the body and arranged parallel to the axis, and a cutting blade provided on the front surface of the protrusion for cutting and crushing the vinyl pipe;
An underground vinyl pipe crusher, characterized in that it is provided on the side surface of the protruding part, has an attachment part for attaching a pilot pipe to the rear part, and is equipped with a mechanism for correcting rolling during movement and propulsion of the rod pipe.・New pipe lead-in device.