JP3529243B2 - Liner removal device for seismic propulsion pipe - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liner removing device for an earthquake-resistant propulsion pipe. 2. Description of the Related Art As a propulsion pipe laid by propelling underground, a propulsion pipe is formed at an inner end face of a receptacle formed at an end of one pipe and at an end of the other propulsion pipe. It is known that the propulsion force is transmitted between the socket openings, that is, between pipes joined to each other by contacting the distal end surface of the insertion slot inserted into the inside of the socket. As one kind of such a propulsion pipe, an earthquake-resistant propulsion pipe has been demanded. When the propulsion work is completed, this seismic propulsion pipe must have a predetermined distance between the back end face of the receiving port and the tip end face of the receiving port, and allow the receiving port to escape from the receiving port within a certain range. Thus, it is intended to enable relative displacement between the receiving port and the receiving port when an earthquake occurs. [0004] When the seismic propulsion pipe is propelled, as described above, at the time of completion of the propulsion, a predetermined interval is provided between the deep end face of the receptacle and the tip end face of the insertion port, so that these receptacles are spaced apart from each other. It is preferable to interpose a liner for transmitting thrust between the rear end surface and the front end surface of the insertion opening. Then, by removing this liner toward the inside of the pipe after the completion of propulsion, the above-mentioned interval can be secured. [0005] It is a technical object of the present invention to make it possible to easily remove such a liner. SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a method for propelling a seismic propulsion pipe by using one of front and rear propulsion.
The back end of the port formed at the end of the pipe and the end of the other propulsion pipe
Tip of the insertion hole formed in the part and inserted into the inside of the receptacle
To transmit the propulsion at the seismic space between
Insert the liner interposed between the tip of the
A device for removing after traveling is completed, a traveling body that can travel inside the propulsion tube, a detaching hook that is provided on the traveling body and that can be hooked on the hook of the liner, And a drive device for moving the liner inward in the radial direction of the tube. With such a configuration, after the propulsion is completed,
The travel of the traveling body makes it possible to reach a position between the front end of the insertion port and the rear end of the receptacle inside the propulsion pipe, that is, a position where the liner is interposed at the time of propulsion. At this position, the hook for removal is hooked on the hook of the liner, and the drive device moves the hook for removal inward in the radial direction of the pipe, so that the liner can be inserted into the pipe from between the tip of the insertion port and the back end of the receptacle. To be taken out. FIG. 5 shows an example of laying an earthquake-resistant propulsion pipe. Here, 91 is a starting pit excavated from the ground surface 92, 9
Reference numeral 3 denotes a similarly cut open reaching pit, and a horizontal pipeline 94 having a structure in which a plurality of seismic resistant propulsion pipes are joined is laid by propulsion work from the bottom of the starting pit 91 to the bottom of the reaching pit 93. . FIG. 6 shows an example of the structure of a joint portion of an earthquake-resistant propulsion pipe constituting a pipe 93. Here, a receiving port 2 is formed at an end of one of the cast iron pipes 1, and an end of the other cast iron pipe 3 joined to the pipe 1 is provided inside the receiving port 2 of the pipe 1. An insertion hole 4 to be inserted is formed. A tapered sealing material pressing surface 5 is formed on the inner periphery of the opening end of the receiving port 2, and a lock ring receiving groove 6 is formed on the inner periphery of the receiving port 2 on the inner side of the sealing material pressing surface 5. ing. Further, an inner peripheral surface 7 having a fixed length in the tube axis direction and a rear end surface 8 in the tube radial direction are provided on the inner periphery of the receiving port 2 on the back side of the lock ring housing groove 6 in this order. It is formed with. An annular rubber sealing member 9 is disposed between the sealing member pressing surface 5 and the outer peripheral surface of the insertion opening 4. A plurality of bolts 10 extending in the circumferential direction are provided on the end face of the receiving port 2 in the circumferential direction.
Is pressed, and the pressing wheel 1 through which the bolt 10 is passed
1 is fastened by a nut 12, so that the pressing wheel 11
The seal member 9 is compressed between the receiving port and the insertion port via the split ring 13, whereby a predetermined sealing function is exhibited. The lock ring accommodating groove 6 accommodates a lock ring 14 that can be tightly divided in the circumferential direction, and a backup ring 15 is interposed between the lock ring 14 and the seal member 9. A projection 16 is formed integrally with the outer periphery of the distal end of the insertion opening 4 so as to engage with the lock ring 14 from the back side of the receiving opening 2. The sealing material 9 and the backup ring 15 can be fitted over the insertion opening 4 beyond the projection 16,
The projection 16 can pass through the lock ring 14 while pushing and expanding the lock ring 14 in the accommodation groove 6. [0012] On the outer circumference of the pipes 1 and 3, an exterior concrete 1 is provided.
7 are formed. At the outer periphery of the insertion hole 4, the bolt 1
A flange 18 is provided at a position apart from the leading end of the tube 0 in the pipe axis direction, and an annular cover 19 having an L-shaped cross section is attached using the flange 18. The cover 19 prevents the inflow of earth and sand around the bolt 10 by the inner periphery of the tip sliding on the flange 20 on the outer periphery of the opening of the receiving port 2. A liner 21 is interposed between the distal end surface 22 of the insertion opening 4 and the rear end surface 8 of the receiving opening 2. As shown in FIG. 7, the liner 21 is formed in an annular shape and is of a split type configuration, and a metal main body 23 provided at a plurality of positions in a circumferential direction and a main body 23 adjacent in the circumferential direction are connected to each other. And a plurality of elastic members 24 provided therebetween. The elastic body portion 24 is formed of a sponge material or the like, and the main body 23 and the elastic body portion 24 are bonded to each other, so that the liner 21 is formed in an annular integrated structure. Further, the liner 21 can be deformed into a state in which the diameter is reduced from the state shown in FIG. 7 by elastically deforming the elastic body portion 24. The main body 23 has one end surface 26 in contact with the front end surface 22 of the insertion opening 4 and the other end surface 27 in contact with the rear end surface 8 of the socket 2. A U-shaped hook 28 is provided on the inner periphery of the main body 23. In FIGS. 1 and 2, reference numeral 31 denotes a liner removing device according to the present invention. The liner removal device 31 is provided with a traveling body 3 that can travel inside the pipeline 94.
2 The traveling body 32 has a horizontal main body frame 33, and the main body frame 33 is provided with a pair of front and rear legs 34. That is, the body frame 3
3 is supported in the pipe by a pair of legs 34, 34 which are spaced from each other in the circumferential direction, and the bottom of these legs 34 has a running body inside a conduit 94. Roller 35 for making the 32 run smoothly
Is provided. A hydraulic cylinder 36 is provided at the front and rear portions of the main frame 33 so as to expand and contract upward, and a reaction force plate 37 is attached to the expansion and contraction end of each hydraulic cylinder 36. When the hydraulic cylinder 36 extends, the reaction force plate 37 is pressed against the inner surfaces of the tops of the pipes 1 and 3 constituting the pipe 94, whereby the liner removing device 31 is fixed in the pipe in a centered state. Is done. A detaching mechanism 40 is provided at the front end of the main body frame 33. That is, a substrate 41 is rotatably attached to the front end of the main body frame 33, and a pinion 43 meshing with an arc gear 42 provided on the substrate 41 is driven by a motor 44 on the main body frame 33 side. 41 is rotatable in a certain range in the circumferential direction. The substrate 41 is provided with a pantograph mechanism 47 as a driving device, which is expanded and contracted in the tube axis direction by a cylinder device 46. This pantograph mechanism 4
7 has links 48 at a plurality of positions in the circumferential direction corresponding to the hooks 28 of the liner 21, and a detaching hook 50 is provided at a node 49 of each link 48. At the end of the pantograph mechanism 47, there is provided a rotating arm 51 in the tube axis direction.
1 is configured to be driven to rotate about its axis. At the tip of the rotating arm 51, a CCD camera 52 having a visual field in the tube diameter direction and capable of projecting the detaching hook 50 and its periphery is provided. In such a configuration, at the time of propulsion work, the rear end face 8 of the receiving port 2 of the pipe 1 and the tip face 2 of the insertion port 4 of the pipe 3
A propulsion force is transmitted by interposing a liner 21 between the propulsion unit 2 and the propulsion unit 2. When the propulsion work is completed, for example, as shown in FIG. 5, a small winch 95 is installed on the ground surface 92 of the starting shaft 91, and the liner removing device 31 is carried into the reaching shaft 93. Then, the wire 96 drawn out from the winch 95 is passed from the starting shaft 91 into the pipeline 94 and connected to the front end of the liner removing device 31 in the reaching shaft 93. The self-propelled vehicle 97 is stopped at a portion of the ground surface 92 in the arrival shaft 93. A similar small winch is mounted on the self-propelled vehicle 97, and a wire 98 drawn out from the small winch is connected to the rear end of the removing device 31. The self-propelled vehicle 97 is equipped with a monitor such as a TV screen. In this state, the winch 95 is operated,
The liner removing device 31 is drawn into the pipe 94,
The liner removal device 31 is driven to stop at a position where the removal hook 50 approaches the liner 21 while observing the image of the CCD camera 52. Further, the hydraulic cylinder 36 is extended, the reaction force plate 37 is brought into light contact with the inner surface of the top of the tubes 1 and 3, and the liner removing device 31 is temporarily fixed to the tubes 1 and 3 in a centered state. Then, the pantograph mechanism 47 is rotated about the axis together with the substrate 41 by the motor 44,
While observing the image of the D camera 52, the phase of the removal hook 50 is matched with the hook 28 of the liner 21. Further, the pantograph mechanism 47 is opened and moved by the cylinder device 46 so that the position of the removing hook 50 along the pipe diameter direction matches the position of the hook 28 of the liner 21. Thereafter, when the liner removing device 31 in the temporarily fixed state is slightly moved by the winch 95,
As shown in FIGS. 1 and 3, the removal hook 50 enters the U-shaped hook 28 of the liner 21 and engages with the hook. The state is confirmed by the image of the CCD camera 52. In addition, the CCD 51
By rotating the camera 51 about the axis, engagement is confirmed at all of a plurality of positions along the circumferential direction.
Then, the hydraulic cylinder 36 is re-actuated, and the reaction force plate 37 is strongly pressed against the inner surface of the tops of the tubes 1 and 3 to securely fix the liner removing device 31 to the tubes 1 and 3 in a centered state. Next, as shown in FIG.
When the pantograph mechanism 47 is closed, a radially inward force F acts on the main body 23 of the liner 21 via the hooks 50 and 28. Then, the main body 23
Is moved into the tube with the elastic deformation of the elastic body portion 24 against the compressive load during propulsion, and the end surfaces 26 and 27 of the elastic body portion 24 and the back end surface 8 of the receiving port and the distal end surface 22 of the insertion port 4 are engaged. The match is released. When the pantograph mechanism 47 is closed, the detachment hook 50 slightly moves not only in the pipe diameter direction but also in the pipe axis direction due to its structure. There is no hindrance to removal from the liner 21. When such movement in the tube axis direction becomes a problem, it is possible to provide an appropriate means for absorbing the movement amount. If the liner 21 can be removed into the pipe in this way, the hydraulic cylinder 36 is shortened to move the reaction force plate 37 away from the pipe inner surface. Then, while holding the liner 21 in the reduced diameter state by the removal hook 50 engaged with the hook 28, the liner removal device 31 is caused to travel toward the starting pit 91 or the reaching pit 93 by pulling the wire 96 or the wire 98. So this liner 21
Collect. As a result, the liner 21 can be easily removed by remote control from outside the pipe as shown in FIG. 5, and the pipe joint can be provided with earthquake resistance. That is, when the liner 21 is detached in this manner, a gap is generated between the front end face 22 of the insertion port 4 and the rear end face 8 of the receptacle 2. The insertion of the insertion port 4 into the receiving port 2 is allowed. Until the projection 16 engages with the lock ring 14, the insertion opening 4 is allowed to come out of the receiving opening 2. As a result, a required earthquake-resistant function is provided between the receiving port 2 and the insertion port 4. Thereafter, the liner removing device 31 is pulled into the pipe again, and the liner 21 of the next joint is removed in the same manner. At this time, the position of the next joint is confirmed by the image of the CCD camera 52. As described above, according to the present invention, seismic propulsion
Formed at the end of one of the front and back propulsion pipes during propulsion of the pipe
The receiving port is formed at the back end of the receiving port and at the end of the other propulsion pipe.
Seismic clearance between the end of the mouth inserted into the mouth
So that the propulsive force is transmitted at the tip and the back of the socket.
Remove the liner interposed between the ends after the propulsion is completed.
A traveling body capable of traveling inside the propulsion pipe, a removal hook provided on the traveling body and capable of engaging with a hook of the liner, and a pipe diameter of the liner via the removal hook. And a drive device for moving inward in the direction, so that the liner is interposed between the distal end of the insertion port and the rear end of the receptacle inside the propulsion pipe due to the traveling of the traveling body, that is, at the position where the liner is interposed at the time of propulsion. In this position, the liner can be easily taken out of the pipe from between the distal end of the insertion port and the rear end of the receptacle by the removal hook and the driving device.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining an operation of removing a liner of an earthquake-resistant propulsion pipe by a liner removing device according to an embodiment of the present invention. FIG. 2 is a side view of the liner removing device of FIG. FIG. 3 is a view showing a state in which a detaching hook of the liner detaching device of FIG. 1 is engaged with a hook of the liner; FIG. 4 is a diagram showing the next stage of FIG. 3; FIG. 5 is a diagram showing an example of laying an earthquake-resistant propulsion pipe. FIG. 6 is a sectional view showing a configuration of a joint portion of the seismic proof propulsion pipe from which a liner is to be removed by the liner removing device according to the embodiment of the present invention. FIG. 7 is an overall side view of the liner. [Description of Signs] 2 Receiving port 4 Inserting port 21 Liner 28 Hook 32 Running body 47 Pantograph mechanism 50 Removal hook

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-18975 (JP, A) JP-A-61-38718 (JP, A) JP-A-10-148290 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) E21D 9/06

Claims (1)

(57) [Claims 1] At the time of propulsion of an earthquake-resistant propulsion pipe, a back end formed at one end of one of the front and rear propulsion pipes and an end of the other propulsion pipe are formed. The propulsion force is transmitted at the seismic space between the end of the insertion port inserted into the receptacle and the end of the insertion port.
A liner interposed between the tip of the socket and the back end of the socket
A device for removing after completion of propulsion, a traveling body capable of traveling inside the propulsion pipe, a detaching hook provided on the traveling body and capable of engaging with a hook of the liner, and a detaching hook And a drive device for moving the liner inward in the radial direction of the pipe through the liner.