Pipe conveying device and method for joining pipes in pipeline laying tunnel

Abstract

The first conveying trolley (12) carrying the first tube (11) and the second conveying trolley (15) carrying the second tube (14) are moved forward, one end portion (19) of the first tube (11) is connected to the other end portion (20) of the last tube (4) of the pipeline (2), the other end portion (20) of the first tube (11) is lifted, the first conveying trolley (12) and the second conveying trolley (15) are moved backward, the first conveying trolley (12) is pulled out from under the first tube (11) toward the front side, and the connecting tube (4) is connected to the first tube (11). The structural member (28) is removed and the first conveying trolley (12) is separated from the second conveying trolley (15), the first conveying trolley (12) is moved backward and pulled under the second tube (14) loaded on the second conveying trolley (15), the second conveying trolley (15) is moved forward together with the first conveying trolley (12), and one end portion (19) of the second tube (14) on the second conveying trolley (15) is connected to the other end portion (20) of the first tube (11) connected to the last tube (4).

Description

Technical Field

[0001] The present invention relates to a pipe conveying device used, for example, when pipes are joined to form a pipe in a pipe laying tunnel formed underground by a shield boring machine, and a pipe joining method using the pipe conveying device. Background Art

[0002] Conventionally, such a tube transport device has been used, for example Fig.51 , Fig.52 As shown, there is a pipe conveying device used when the last pipe 202 of the pipe in the pipe laying tunnel 201 is connected to the first pipe 203 and the second pipe 204. The pipe conveying device 205 is freely movable on the rail 206 in the pipe laying tunnel 201, and has a first conveying trolley 207 for conveying the first pipe 203, a second conveying trolley 208 for conveying the second pipe 204, and a connecting rod 209 for connecting the first conveying trolley 207 and the second conveying trolley 208. One end of the connecting rod 209 is detachably connected to the first conveying trolley 207 via a first connecting pin 211, and the other end of the connecting rod 209 is detachably connected to the second conveying trolley 208 via a second connecting pin 212.

[0003] Using such a tube conveying device 205, the tubes are joined as follows.

[0004] First, if Fig.52 As shown, in a state where the first tube 203 is placed on the first transport cart 207 and the second tube 204 is placed on the second transport cart 208 , the tube transport device 205 is advanced and stopped in front of the last tube 202 .

[0005] Next, the first connecting pin 211 is removed to disconnect the connecting rod 209 from the first transport vehicle 207 , the second connecting pin 212 is removed to disconnect the connecting rod 209 from the second transport vehicle 208 , and the connecting rod 209 is removed to separate the first transport vehicle 207 from the second transport vehicle 208 .

[0006] Thereafter, the first transport vehicle 207 is moved forward to join one end of the first tube 203 to the other end of the last tube 202 .

[0007] Afterwards, if Fig.53 As shown, a pillow member 214 is provided below the first pipe 203 , the first pipe 203 is stored on the pillow member 214 , and the first transport vehicle 207 is moved backward and pulled out from below the first pipe 203 to the front side of the first pipe 203 .

[0008] The first transport cart 207 thus extracted is lifted up and recovered into the second pipe 204 placed on the second transport cart 208 .

[0009] Thereafter, the second transport cart 208 is moved forward, and one end of the second tube 204 on the second transport cart 208 is joined to the other end of the first tube 203 joined to the last tube 202 .

[0010] Note that the above-mentioned pipe conveying device and pipe joining method are described in Japanese Unexamined Patent Publication No. 2001-280541. Summary of the invention

[0011] Problems to be solved by the invention

[0012] However, in the above-mentioned conventional forms, Fig.53 As shown, after the first tube 203 is joined to the last tube 202, the first conveying cart 207 that is pulled out from the bottom of the first tube 203 to the front side of the first tube 203 is lifted up and moved into the second tube 204 on the second conveying cart 208. Therefore, when the first conveying cart 207 is large and heavy, there is a problem that the operation of lifting the first conveying cart 207 and moving it into the second tube 204 on the second conveying cart 208 requires a lot of time and labor.

[0013] In addition, in the above-mentioned conventional form, when the first tube 203 is placed on the first transport trolley 207 and the second tube 204 is placed on the second transport trolley 208, the connecting rod 209 is hidden under the first tube 203 and the second tube 204. Since the space under the first tube 203 and the space under the second tube 204 are very narrow, when the first connecting pin 211 is removed and the connection between the connecting rod 209 and the first transport trolley 207 is released, the first tube 203 becomes an obstacle, and the operation of removing the first connecting pin 211 is difficult to perform. Alternatively, when the second connecting pin 212 is removed and the connection between the connecting rod 209 and the second transport trolley 208 is released, the second tube 204 becomes an obstacle, and the operation of removing the second connecting pin 212 is difficult to perform.

[0014] Due to such a situation, there is a problem that the work of removing the connecting rod 209 and separating the first transport cart 207 and the second transport cart 208 requires time and labor.

[0015] An object of the present invention is to provide a method for joining pipes in a pipeline laying tunnel, which can save the time and effort of lifting a first transport trolley and moving the first transport trolley into a second pipe on a second transport trolley.

[0016] An object of the present invention is to provide a pipe conveying device and a method for joining pipes in a pipeline laying tunnel, which can reduce the time and labor required for removing a connecting member and separating a first conveying trolley from a second conveying trolley.

[0017] Means for solving problems

[0018] The method for joining pipes in a pipeline laying tunnel of the present invention is a method for joining pipes as follows: a first pipe is placed on a first conveying trolley of a pipe conveying device having a first conveying trolley and a second conveying trolley that can freely travel on a steel rail in the pipeline laying tunnel, a second pipe is placed on a second conveying trolley connected to the first conveying trolley via a connecting member, the first pipe and the second pipe are conveyed, and the first pipe and the second pipe are joined in sequence at the last pipe in the pipeline laying tunnel, wherein:

[0019] The first conveying carriage carrying the first tube and the second conveying carriage carrying the second tube are moved forward to join one end of the first tube to the other end of the last tube.

[0020] The other end of the first pipe is lifted, the first transport trolley and the second transport trolley are moved backward, and the first transport trolley is pulled out from below the first pipe to the front side of the first pipe.

[0021] Remove the connecting member and separate the first conveying trolley from the second conveying trolley.

[0022] The first transport trolley is moved backward and pulled under the second tube placed on the second transport trolley.

[0023] The second transport cart is moved forward together with the first transport cart, and one end of the second tube on the second transport cart is joined to the other end of the first tube joined to the last tube.

[0024] According to the method for joining pipes in a pipeline laying tunnel of the present invention, it is preferred that after one end of the second pipe on the second conveying trolley is joined to the other end of the first pipe joined to the last pipe, the other end of the second pipe is lifted, the first conveying trolley and the second conveying trolley are retreated, and the first conveying trolley and the second conveying trolley are pulled out from under the second pipe to the front side of the second pipe.

[0025] According to the method for joining pipes in a pipeline laying tunnel of the present invention, it is preferred that after the other end of the first pipe is lifted and the first conveying trolley and the second conveying trolley are retreated to pull the first conveying trolley out from under the first pipe to the front side of the first pipe, the rail under the first pipe joined to the last pipe is removed and placed on the first conveying trolley,

[0026] Remove the connecting member and separate the first conveying trolley from the second conveying trolley.

[0027] The first transport cart is pulled under the second pipe placed on the second transport cart together with the removed rails.

[0028] According to the method for joining pipes in a pipeline laying tunnel of the present invention, it is preferable that the removed connecting member is moved into the second pipe.

[0029] According to the method for joining pipes in a pipeline laying tunnel of the present invention, it is preferred that after the other end of the first pipe is lifted and the first transport trolley and the second transport trolley are moved backward to pull the first transport trolley out from under the first pipe to the front side of the first pipe,

[0030] A support member is provided below the other end of the first pipe.

[0031] The other end portion of the first pipe is lowered onto the supporting member and supported by the supporting member.

[0032] According to the method for joining pipes in a pipeline laying tunnel of the present invention, preferably, after the connecting member is removed and the first conveying trolley is separated from the second conveying trolley,

[0033] The first transport cart is pulled under the second pipe while the second pipe placed on the second transport cart is lifted by the lifting device provided on the second transport cart.

[0034] The method for joining pipes in a pipeline laying tunnel of the present invention is a method for joining pipes as follows: a first pipe is placed on a first conveying trolley of a pipe conveying device having a first conveying trolley and a second conveying trolley that can freely travel on a steel rail in the pipeline laying tunnel, a second pipe is placed on a second conveying trolley connected to the first conveying trolley via a connecting member, the first pipe and the second pipe are conveyed, and the first pipe and the second pipe are joined in sequence at the last pipe in the pipeline laying tunnel, wherein:

[0035] The first conveying carriage carrying the first tube and the second conveying carriage carrying the second tube are moved forward to join one end of the first tube to the other end of the last tube.

[0036] The other end of the first pipe is lifted, the first transport trolley and the second transport trolley are moved backward, and the first transport trolley is pulled out from under the first pipe to the front side of the first pipe.

[0037] Remove the connecting member and separate the first conveying trolley from the second conveying trolley.

[0038] An auxiliary rail device is provided, the auxiliary rail device branching from the rail on the front side of the first pipe and extending into the second pipe placed on the second transport cart,

[0039] The first transport vehicle is moved backward from the front side of the first pipe, and is driven on the auxiliary rail device and transferred from the rail to the second pipe.

[0040] Remove the inclined portion of the auxiliary rail device that branches off from the rail and protrudes forward from one end of the second pipe.

[0041] The second transport cart is moved forward, and one end of the second tube on the second transport cart is joined to the other end of the first tube joined to the last tube.

[0042] According to the method for joining pipes in a pipeline laying tunnel of the present invention, it is preferred that when the connecting member is removed and the first conveying trolley is separated from the second conveying trolley, one end of the connecting member is separated from the first conveying trolley.

[0043] The operation portion provided on the connection member is operated to release the connection between the other end portion of the connection member and the second transport vehicle, thereby removing the connection member from between the first transport vehicle and the second transport vehicle.

[0044] The pipe conveying device of the present invention is a pipe conveying device for conveying pipes, and is characterized in that:

[0045] The pipe conveying device comprises a first conveying trolley for conveying a first pipe, a second conveying trolley for conveying a second pipe, and a connecting device for connecting the first conveying trolley and the second conveying trolley.

[0046] The connecting device includes a connecting member, one end of which is detachably mounted on and off the first transport trolley and the other end of which is detachably mounted on and off the second transport trolley.

[0047] An engaging member that can be engaged with or disengaged from either the first transport trolley or the second transport trolley is provided at an end of the connecting member.

[0048] The engaging member can be switched between an engaged state in which it is engaged with one of the transport carts and a disengaged state in which it is disengaged from one of the transport carts.

[0049] The connecting member is provided with a switching device for switching the engaging member from an engaged state to a disengaged state.

[0050] The switching device has an operating unit for operating the switching device from the outside.

[0051] The operation portion is exposed to a space formed between the first pipe placed on the first transport cart and the second pipe placed on the second transport cart.

[0052] According to the tube conveying device of the present invention, it is preferable that the engaging member is switched to the disengaged state by dropping the engaging state.

[0053] According to the tube conveying device of the present invention, it is preferable that one of the conveying carts is provided with a biasing member that biases the engaging member from an engaged state to a disengaged state.

[0054] According to the pipe conveying device of the present invention, preferably, the connecting member can be divided into a first connecting member and a second connecting member.

[0055] The first connecting member is detachably connected to the first transport vehicle.

[0056] The engaging member and the switching device are arranged on the second connecting member.

[0057] The engaging member can be switched between an engaged state in which it is engaged with the second transport cart and a disengaged state in which it is disengaged from the second transport cart.

[0058] Effects of the Invention

[0059] As described above, according to the present invention, after the first tube is connected to the last tube, the first conveying trolley is pulled out to the front side of the first tube, the first conveying trolley is pulled under the second tube placed on the second conveying trolley, the second conveying trolley is moved forward together with the first conveying trolley, and the second tube on the second conveying trolley is connected to the first tube connected to the last tube, thereby saving the time and effort of lifting the first conveying trolley and moving it into the second tube on the second conveying trolley.

[0060] In addition, by operating the operating unit and activating the switching device, the switching device is used to switch the engaging member from the engaged state to the disengaged state, thereby releasing the connection between the first conveyor trolley and the connecting member of either the second conveyor trolley. At this time, since the operating unit can be operated in a manner that the first tube and the second tube do not become an obstacle, even if the space below the first tube mounted on the first conveyor trolley is narrow or the space below the second tube mounted on the second conveyor trolley is narrow, the connection between the conveyor trolley and the connecting member can be easily released by operating the operating unit. As a result, the time and labor required for the operation of removing the connecting member and separating the first conveyor trolley from the second conveyor trolley can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 This is a side view of a pipe placed on a pipe conveying device used in the pipe joining operation according to the first embodiment of the present invention.

[0062] Figure 2 It is a partially cutaway top view of a tube placed on the tube conveying device.

[0063] Figure 3 is a side view of the tube conveying device.

[0064] Figure 4 It is a top view of the first conveying trolley of the tube conveying device.

[0065] Figure 5 yes Figure 1 XX direction view in.

[0066] Figure 6 Yes Figure 5 A magnified portion of the image.

[0067] Figure 7 It is a cross-sectional view of a connection portion between the first transport carriage and the first connection member of the tube transport device.

[0068] Figure 8 It is a top view of the second conveying trolley of the tube conveying device.

[0069] Fig. 9 It is a top view of the connection portion between the first connection member and the second connection member of the tube conveying device.

[0070] Fig.10 It is a cross-sectional view of a connection portion between a first connection member and a second connection member of the tube conveying device.

[0071] Fig.11 It is a cross-sectional view of the connection portion between the second transport carriage and the second connection member of the tube transport device and the switching device, and shows a state in which the engagement pin is switched to the engagement position.

[0072] Fig.12 yes Fig.11 XX direction view in.

[0073] Fig.13 It is a cross-sectional view of the connection portion between the second transport carriage and the second connection member of the tube transport device and the switching device, and shows a state in which the engagement pin is switched to the disengaged position.

[0074] Fig.14 yes Fig.13 XX direction view in.

[0075] Fig.15 It is a cross-sectional view of the connection portion between the second transport carriage and the second connecting member and the switching device of the tube transport device, and shows a state in which the second transport carriage and the second connecting member are separated.

[0076] Fig.16 This is a three-dimensional view of a lifting jig used in the pipe joining operation.

[0077] Fig.17 This is a cross-sectional view of a lifting jig used in the pipe joining operation.

[0078] Fig.18 This is a front view of a lifting jig used in the pipe joining operation.

[0079] Fig.19This is a diagram showing a case where the socket of a pipe is lifted using the lifting jig.

[0080] Fig. 20 This is a diagram showing a method of joining the tubes.

[0081] Fig.21 This is a diagram showing a method of joining the tubes.

[0082] Fig. 22 This is a diagram showing a method of joining the tubes.

[0083] Fig.23 This is a diagram showing a method of joining the tubes.

[0084] Fig.24 This is a diagram showing a method of joining the tubes.

[0085] Fig.25 This is a diagram showing a method of joining the tubes.

[0086] Fig.26 This is a diagram showing a method of joining the tubes.

[0087] Fig. 27 This is a diagram showing a method of joining the tubes.

[0088] Fig.28 This is a diagram showing a method of joining the tubes.

[0089] Fig.29 This is a diagram showing a method of joining the tubes.

[0090] Fig.30 This is a diagram showing a method of joining the tubes.

[0091] Fig.31 This is a diagram showing a method of joining the tubes.

[0092] Fig.32 It is a side view of the auxiliary rail device used for the pipe joining operation in the second embodiment of the present invention.

[0093] Fig.33 1 is a top view of the auxiliary rail device.

[0094] Fig.34 It is the front view of the auxiliary rail device.

[0095] Fig.35 It is an enlarged front view of the auxiliary track device.

[0096] Fig.36 It is a figure which shows the method of joining pipes using this auxiliary rail device.

[0097] Fig.37 This is a diagram showing a method of joining the tubes.

[0098] Fig.38 This is a diagram showing a method of joining the tubes.

[0099] Fig.39 This is a diagram showing a method of joining the tubes.

[0100] Fig.40 This is a diagram showing a method of joining the tubes.

[0101] Fig.41 This is a diagram showing a method of joining the tubes.

[0102] Fig.42 This is a diagram showing a method of joining the tubes.

[0103] Fig.43 This is a diagram showing a method of joining the tubes.

[0104] Fig.44 This is a diagram showing a method of joining the tubes.

[0105] Fig.45 This is a diagram showing a method of joining the tubes.

[0106] Fig.46 This is a diagram showing a method of joining the tubes.

[0107] Fig.47 This is a diagram showing a method of joining the tubes.

[0108] Fig.48 This is a diagram showing a method of joining the tubes.

[0109] Fig.49 This is a diagram showing a method of joining the tubes.

[0110] Fig.50 This is a diagram showing a method of joining the tubes.

[0111] Fig.51 This is a schematic side view of a conventional tube conveying device.

[0112] Fig.52 The figure shows the method of joining the tubes using the tube conveying device.

[0113] Fig.53 This is a diagram showing a method of joining the tubes.

[0114] Fig.54 This is a diagram showing a method of joining the tubes. DETAILED DESCRIPTION

[0115] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0116] (First Embodiment)

[0117] In a first embodiment, if Figure 1 , Figure 2 , Fig. 20 As shown, reference numeral 1 is a pipe laying tunnel constructed underground by a shield tunneling machine, and a primary lining is implemented. A pipe 2 formed by joining a plurality of pipes and a pair of left and right tracks 17 (an example of a steel rail) are laid in the pipe laying tunnel 1. In addition, the two tracks 17 are each formed by joining a plurality of split tracks 18.

[0118] In addition, the pipeline laying tunnel 1 is provided with a pipe conveying device 10 for conveying the pipe and a vehicle 9 such as a battery vehicle for driving the pipe conveying device 10. Figure 1 to Figure 3 As shown, the tube conveying device 10 includes a first conveying carriage 12 for conveying a first tube 11 , a second conveying carriage 15 for conveying a second tube 14 , and a coupling device 16 for coupling the first conveying carriage 12 and the second conveying carriage 15 .

[0119] The pipes constituting the duct 2, the last pipe 4 of the duct 2, the first pipe 11 and the second pipe 14 each have a socket 19 at one end and a socket 20 at the other end. The self-propelled vehicle 9 is detachably connected to the second transport vehicle 15.

[0120] like Figure 3 , Figures 4 to 7 As shown, the first transport trolley 12 can travel freely on the track 17 in the pipe laying tunnel 1, and has a trolley body 23, a plurality of traveling wheels 24 arranged on the trolley body 23, a plurality of trolley jacks 25 (an example of a lifting device) for raising and lowering the first pipe 11 supported on the trolley body 23, and a temporary placement plate 26 for temporarily placing the dismantled divided track 18.

[0121] The trolley body 23 has a pair of front and rear support frames 60 supporting the first tube 11 and a connecting frame 61 connected between the two support frames 60. In addition, the travel wheels 24 can roll freely on the rails 17, the trolley jack 25 is provided on the trolley body 23, and the temporary placement plate 26 is provided on both side ends of the trolley body 23.

[0122] In addition, if Figure 1 to Figure 3 , Figure 5 , Figure 6 , Figure 8 As shown, the second transport trolley 15 has the same structure as the first transport trolley 12, and the second pipe 14 is supported on the trolley body 23. Figure 8 , Figure 11 to Figure 15 As shown, the carriage body 23 of the second transport carriage 15 has a connecting plate 27 at one end portion, and an engaging hole 31 penetrating in the up-down direction is formed in the connecting plate 27 .

[0123] The connection device 16 includes a connection member 28 whose one end is detachably connected to the carriage body 23 of the first transport carriage 12 and whose other end is detachably connected to the carriage body 23 of the second transport carriage 15. The connection member 28 can be divided into a first connection member 29 and a second connection member 30.

[0124] like Figure 3 , Figure 4 , Figure 7 As shown, one end of the first connecting member 29 is detachably connected to the trolley body 23 of the first transport trolley 12 via a first connecting pin 32. Fig. 9 , Fig.10 As shown, the other end of the first connecting member 29 and one end of the second connecting member 30 are detachably connected via a plurality of relay connecting pins 33 .

[0125] like Figure 11 to Figure 15 As shown, the second connecting member 30 is a channel-shaped member with an open bottom surface, and has a support plate 39 on the top surface of the other end. The support plate 39 has a holding hole 40 that passes through the second connecting member 30 in the up-down direction.

[0126] The second coupling member 30 is provided with an engagement pin 36 (an example of an engagement member) that is engageable and disengageable with the second transport carriage 15 , and a switching device 37 that switches the engagement pin 36 from an engaged state to a disengaged state.

[0127] The engagement pin 36 is inserted into the holding hole 40 of the second connecting member 30, and can be freely engaged and disengaged with the connecting plate 27 of the second transport carriage 15, and can be switched between an engaged position P1 and a disengaged position P2. Fig.11 , Fig.12 As shown in FIG. 1 , the disengagement position P2 is a position where the second transport vehicle 15 is engaged with the connecting plate 27 and the engagement hole 31 is inserted from below. Fig.13 , Fig.14 As shown, the engagement pin 36 falls from the engagement position P1 to the position below the engagement hole 31 and is separated from the connecting plate 27 of the second transport carriage 15. The engagement state corresponds to the state in which the engagement pin 36 is switched to the engagement position P1, and the disengagement state corresponds to the state in which the engagement pin 36 is switched to the disengagement position P2.

[0128] The switching device 37 switches the engagement pin 36 from the engagement position P1 to the disengagement position P2, and has a support plate 43, a linkage rod 44 and an operating rod 45 (an example of an operating part), the support plate 43 supports the engagement pin 36 in the engagement position P1 from below, the linkage rod 44 slides freely in the tube length direction A, and the operating rod 45 is used to operate the switching device 37 from the outside.

[0129] The support plate 43 is supported by the support piece 47 inside the other end of the second connecting member 30 and is slidable along the pipe length direction A. In addition, the linkage rod 44 is arranged in the second connecting member 30, the operating rod 45 is arranged at one end of the linkage rod 44, and the support plate 43 is arranged at the other end of the linkage rod 44.

[0130] Furthermore, a receiving plate 56 is provided inside the other end of the second connecting member 30 , and the receiving plate 56 receives from below the engaging pin 36 that has fallen from the engaging position P1 to the disengaging position P2 .

[0131] In addition, if Fig. 9 , Fig.10 , Fig.11 , Fig.13 As shown, a long hole 48 is formed at one end of the second connecting member 30, which passes through the long hole 48 in the up-down direction and is long in the tube length direction A. The operating rod 45 passes through the long hole 48 from the inside of the second connecting member 30 and protrudes above the second connecting member 30, and is exposed to the space 57 formed between the first tube 11 carried on the first conveying carriage 12 and the second tube 14 carried on the second conveying carriage 15.

[0132] In addition, if Fig.11 , Fig.13 , Fig.15 As shown, a fall prevention member 50 is provided at the other end of the second connecting member 30. The fall prevention member 50 is a member for preventing the second connecting member 30 from falling due to its own weight (and the weight of the engagement pin 36 and the force of the coil spring 54 described later) when the engagement pin 36 is engaged with the connecting plate 27 of the second transport carriage 15, and is composed of a vertical plate 51 vertically provided on the upper surface of the second connecting member 30 and a horizontal plate 52 provided at the upper end of the vertical plate 51, forming an inverted L shape.

[0133] like Fig.11 As shown, when the other end of the second connecting member 30 is connected to the second transport cart 15, the connecting plate 27 of the second transport cart 15 is sandwiched between the support plate 39 of the second connecting member 30 and the transverse plate 52 of the fall prevention member 50, and the transverse plate 52 engages with the connecting plate 27 from above.

[0134] Furthermore, when the other end of the second connecting member 30 is connected to the second transport cart 15, the other end of the second connecting member 30 can be temporarily (temporarily) stored in the connecting plate 27 by engaging the horizontal plate 52 with the connecting plate 27 from above. Therefore, during the connection operation of the other end of the second connecting member 30 and the second transport cart 15, the second connecting member 30 can be prevented from falling due to its own weight, and the above-mentioned connection operation can be easily performed.

[0135] In addition, a coil spring 54 (an example of a biasing member) for biasing the engagement pin 36 from the engagement position P1 toward the disengagement position P2 is provided on the connection plate 27 of the second transport cart 15. The coil spring 54 is accommodated in a box-shaped accommodation member 55 provided on the upper surface of the connection plate 27. In addition, an upward-pulling internal thread portion 38 is formed at the top of the engagement pin 36, and the upward-pulling internal thread portion 38 is used to pull up the engagement pin 36 switched to the disengagement position P2 and set it at the engagement position P1.

[0136] According to the switching device 37 as described above, Fig.11 , Fig.12 As shown, when the engagement pin 36 is switched to the engagement position P1, it is supported on the support plate 43 and inserted into the engagement hole 31 and engaged with the connection plate 27. As a result, the second connection member 30 and the second transport carriage 15 are connected via the engagement pin 36 and the connection plate 27. At this time, the coil spring 54 is compressed and the operating lever 45 is switched to the connection position P3.

[0137] Afterwards, if Fig.13 , Fig.14 As shown in FIG. 1 , by switching the operating rod 45 from the connection position P3 to the separation position P4, the linkage rod 44 slides in the pipe length direction A in conjunction with the operating rod 45, and the support plate 43 retreats forward from below the engagement pin 36. As a result, the engagement pin 36 falls, is switched from the engagement position P1 to the separation position P2, and is received by the receiving plate 56. Therefore, the engagement pin 36 falls to the bottom of the engagement hole 31 and is separated from the connection plate 27, as shown in FIG. Fig.15 As shown, the connection between the second connecting member 30 and the second transport vehicle 15 is released.

[0138] At this time, since the engagement pin 36 is urged from the engagement position P1 toward the disengagement position P2 by the coil spring 54 , it is possible to reliably switch to the disengagement position P2 .

[0139] like Figure 16 to Figure 18 As shown, reference numeral 80 is a lifting clamp for lifting a pipe in a pipe laying tunnel 1. The lifting clamp 80 has a clamp frame 81, a clamping mechanism 82, and a hydraulic jack 83. The clamping mechanism 82 clamps the open end of the socket 20 of the first pipe 11 in the pipe diameter direction B.

[0140] The clamp frame 81 includes a back plate portion 86, and an inner plate portion 87 and an outer plate portion 88 provided at both ends of the back plate portion 86. The back plate portion 86 is provided with a handle 89.

[0141] The clamping mechanism 82 includes a pair of fixed plates 91 and a movable plate 92 facing each other in the pipe diameter direction B, and a moving member 93 for moving the movable plate 92 relative to the fixed plate 91. The fixed plate 91 is fixed to the back plate portion 86. The jack 83 includes a retractable pressure head 84, which is mounted on the fixed plate 91 and penetrates the outer plate portion 88.

[0142] The movable member 93 has a bolt body 94 having an external thread on the outer periphery and a snap-on piece 95 provided at the front end of the bolt body 94. A threaded hole 90 having an internal thread is formed in the inner plate portion 87. The bolt body 94 of the movable member 93 is rotatably passed through the threaded hole 90 in a state where the external thread and the internal thread are screwed together. In addition, the movable plate 92 has a snap-on body 96 on the upper surface. The snap-on piece 95 has a larger diameter than the bolt body 94, and the snap-on piece 95 is snap-on with the snap-on body 96.

[0143] According to the lifting fixture 80 as described above, if Fig.18 As shown by the imaginary line of , the open end of the socket 20 is placed between the fixed plate 91 and the movable plate 92, and the movable member 93 is rotated in one direction to bring the movable plate 92 close to the fixed plate 91. As a result, the interval C between the fixed plate 91 and the movable plate 92 in the pipe diameter direction B is shortened, the open end of the socket 20 is clamped between the fixed plate 91 and the movable plate 92, and the lifting clamp 80 is installed at the open end of the socket 20.

[0144] In this way, Fig.19 As shown, by installing two lifting clamps 80 at the lower part of the open end of the socket 20 and extending the pressure heads 84 of the jacks 83 of the two lifting clamps 80, the front end of the pressure heads 84 pushes the inner wall surface 5 of the pipeline laying tunnel 1, so that the socket 20 of the first pipe 11 is lifted.

[0145] Furthermore, by rotating the moving member 93 in the reverse direction to move the movable plate 92 away from the fixed plate 91 , the interval C between the fixed plate 91 and the movable plate 92 in the pipe diameter direction B can be increased, and the lifting clamp 80 can be removed from the open end of the socket 20 .

[0146] Furthermore, similarly to the above, the socket 20 of the second pipe 14 or the socket 19 can be lifted up using the lifting jig 80 .

[0147] Hereinafter, a method for joining pipes in the pipe laying tunnel 1 using the pipe conveying device 10 and the lifting clamp 80 will be described.

[0148] like Fig. 20As shown, by placing the first tube 11 on the trolley body 23 of the first conveying trolley 12 of the tube conveying device 10, placing the second tube 14 on the trolley body 23 of the second conveying trolley 15, and moving the self-propelled vehicle 9 forward to push the tube conveying device 10 forward, the first conveying trolley 12 and the second conveying trolley 15 move forward and convey the first tube 11 and the second tube 14, and the socket 19 (one end) of the first tube 11 is inserted into the socket 20 (the other end) of the last tube 4 of the pipeline 2 and connected thereto.

[0149] At this time, the connecting member 28 is hidden under the first pipe 11 and the second pipe 14. In addition, by adjusting the vertical position of the first pipe 11 using the carriage jack 25 of the first transport carriage 12, centering can be performed during joining.

[0150] Then, if Fig.19 , Fig.21 , Fig. 22 As shown, two lifting clamps 80 are installed at the lower part of the open end of the socket 20 of the first pipe 11, and the pressure heads 84 of the jacks 83 of the two lifting clamps 80 are extended to lift the socket 20 (the other end) of the first pipe 11. As a result, the first pipe 11 floats above the first transport vehicle 12.

[0151] Then, if Fig.23 As shown, the bicycle 9 is moved backward and the tube conveying device 10 is moved rearward, and the first conveying carriage 12 is pulled out from under the first tube 11 to the front side of the first tube 11 .

[0152] Then, if Figure 6 The imaginary line and Fig.24 As shown, the divided rails 18 of the rail 17 below the first pipe 11 are removed and placed on the temporary placement plate 26 of the first transport vehicle 12 .

[0153] Then, if Fig.25 As shown, a support member 63 such as an H-shaped steel is provided below the end portion on the spigot side of the first tube 11, and the pressure head 84 of the jack 83 of the lifting fixture 80 is shortened, so that the spigot side end portion (the other end portion) of the first tube 11 is lowered onto the support member 63 and supported by the support member 63. After that, the two lifting fixtures 80 are removed from the open end portion of the spigot 20 of the first tube 11, and are moved and temporarily stored in the second tube 14. Since the spigot side end portion of the first tube 11 is supported by the support member 63 as described above, the spigot side end portion of the first tube 11 can be prevented from deviating downward.

[0154] Then, if Fig.26 As shown in FIG. 1 , the connecting member 28 is removed to separate the first transport trolley 12 from the second transport trolley 15. Figure 7As shown by the imaginary line, the first connecting pin 32 is removed and the connection between the first connecting member 29 and the first transport trolley 12 is released, such as with Fig.10 As shown by the imaginary line of , the relay connecting pin 33 is removed to release the connection between the first connecting member 29 and the second connecting member 30, so that the first connecting member 29 is separated from between the first conveying carriage 12 and the second connecting member 30. In this way, the first connecting pin 32 can be removed to separate the first connecting member 29 from the first conveying carriage 12 without the first tube 11 becoming an obstacle.

[0155] Afterwards, if Fig.13 , Fig.14 As shown, the operating lever 45 is operated to switch from the connection position P3 to the separation position P4. As a result, the engagement pin 36 is switched from the engagement position P1 to the separation position P2, and the connection between the second connection member 30 and the second transport carriage 15 can be released by remote operation. Fig.15 As shown, the second connecting member 30 is detached from the second transport cart 15 , and the connecting member 28 is removed from between the first transport cart 12 and the second transport cart 15 , so that the first transport cart 12 and the second transport cart 15 are separated.

[0156] like Fig.13 As shown in the figure, since the operation of the operating lever 45 can be performed at a position away from the engagement pin 36, that is, in an empty space in front of the insertion port 19 of the second tube 14, the engagement pin 36 can be switched from the engagement position P1 to the disengagement position P2 by remote operation. Therefore, when the engagement pin 36 is switched from the engagement position P1 to the disengagement position P2, the second tube 14 on the second transport carriage 15 does not hinder the switching.

[0157] Therefore, even when the space below the second tube 14 placed on the second transport cart 15 is narrow, the connection between the other end of the connecting member 28 and the second transport cart 15 can be easily released by operating the operating lever 45. Thus, the time and effort required for removing the connecting member 28 and separating the first transport cart 12 from the second transport cart 15 can be reduced.

[0158] In addition, if Fig.26 As shown in FIG. 1 , the first connecting member 29 and the second connecting member 30 removed as described above are moved and temporarily stored in the second pipe 14 . Then, the second pipe 14 placed on the second transport carriage 15 is lifted up by the carriage jack 25 .

[0159] Afterwards, if Fig. 27As shown, the first transport trolley 12 is pushed and retreated, and is pulled under the second pipe 14 on the second transport trolley 15. Thus, the first transport trolley 12 is pulled under the second pipe 14 together with the split rail 18 removed and placed on the temporary placement plate 26.

[0160] Furthermore, by lifting the second tube 14 on the second transport cart 15 using the cart jack 25 as described above, the space below the second tube 14 is expanded upward, thereby ensuring a space 65 below the second tube 14 in which the first transport cart 12 can be pulled into.

[0161] Afterwards, if Fig.28 As shown, the bicycle 9 is moved forward, and the second transport trolley 15 and the first transport trolley 12 are moved forward together, as shown in FIG. Fig.29 As shown, the socket 19 of the second tube 14 on the second transport cart 15 is engaged with the socket 20 of the first tube 11 engaged with the last tube 4 .

[0162] At this time, by adjusting the up-and-down position of the second pipe 14 using the carriage jack 25 of the second transport carriage 15 , centering can be performed during joining.

[0163] Afterwards, if Fig.30 As shown, two lifting jigs 80 are installed below the open end of the socket 20 of the second pipe 14, and the socket 20 (the other end) of the second pipe 14 is lifted by the lifting jigs 80. Thus, the second pipe 14 floats above the second transport vehicle 15.

[0164] Then, if Fig.31 As shown, the self-propelled vehicle 9 and the first and second conveying carts 12 and 15 are moved backward, and the first and second conveying carts 12 and 15 are pulled out from below the second pipe 14 to the front side of the second pipe 14. Thus, the first pipe 11 and the second pipe 14 are joined at the last pipe 4 of the pipeline 2, and the above joining process is repeated to extend the pipeline 2 in the pipeline laying tunnel 1.

[0165] According to the pipe joining method as described above, it is not necessary to lift and move the empty first transport cart 12 into the second pipe 14 on the second transport cart 15, and the time and labor required for such work can be saved.

[0166] Furthermore, the following operations can be repeatedly performed: recovering the empty first transport cart 12 and the second transport cart 15 , transporting other tubes using the first transport cart 12 and the second transport cart 15 , and sequentially joining the tube at the end.

[0167] In addition, when the operating lever 45 is moved from the connection position P3 (see Fig.11) Switch to separation position P4 (refer to Fig.13 ), the engagement pin 36 moves from the engagement position P1 (refer to Fig.11 , Fig.12 ) falls, thereby the engagement pin 36 is switched to the disengaged position P2 (refer to Fig.13 , Fig.14 ), therefore, the engaging pin 36 can be switched from the engaging position P1 to the disengaging position P2 without using a special driving device such as an electric motor or a hydraulic cylinder, thereby reducing the consumption of electricity and the like.

[0168] Furthermore, since the engagement pin 36 is urged from the engagement position P1 toward the disengagement position P2 by the coil spring 54 , it is possible to reliably switch to the disengagement position P2 .

[0169] In addition, if you use Figure 6 The imaginary line and Fig.24 As shown, by placing the dismantled divided rail 18 on the temporary placement plate 26 of the first transport vehicle 12 , the dismantled divided rail 18 can be easily recovered together with the first transport vehicle 12 .

[0170] Furthermore, after the second tube 14 and the first tube 11 are joined together, the first connecting member 29 and the second connecting member 30 can be easily retrieved from the second tube 14 .

[0171] (Second Embodiment)

[0172] Hereinafter, the second embodiment will be described. Note that the same reference numerals are given to the same components as those of the first embodiment, and detailed descriptions thereof will be omitted.

[0173] In the second embodiment, the first pipe 11 and the second pipe 14 are sequentially joined to the last pipe 4 of the pipeline 2 in the pipeline laying tunnel 1 using the pipe conveying device 10 , the lifting clamp 80 , and the auxiliary rail device 101 (an example of an auxiliary rail device).

[0174] like Figure 32 to Figure 35 As shown, the auxiliary rail device 101 has a plurality of auxiliary sleepers 102 and a pair of left and right auxiliary rails 103 supported on the auxiliary sleepers 102. The auxiliary rail 103 has an inclined rail portion 104 (an example of an inclined portion) inclined obliquely upward from the front end portion to the rear and a horizontal rail portion 105 extending rearward from the rear end portion of the inclined rail portion 104. In addition, the ends of the inclined rail portion 104 and the horizontal rail portion 105 are detachably connected via bolts, nuts, etc.

[0175] The self-propelled vehicle 9 is provided with a wire rope 107 having a hook at the front end thereof and a winch 108 for winding the wire rope 107. The rails 17 in the pipeline laying tunnel 1 are supported by a plurality of sleepers 8.

[0176] Hereinafter, a method for joining pipes in the pipe laying tunnel 1 using the pipe conveying device 10 , the lifting clamp 80 , and the auxiliary rail device 101 will be described.

[0177] like Fig.36 As shown, by placing the first tube 11 on the trolley body 23 of the first conveying trolley 12 of the tube conveying device 10, placing the second tube 14 on the trolley body 23 of the second conveying trolley 15, and moving the self-propelled vehicle 9 forward to push the tube conveying device 10 forward, the first conveying trolley 12 and the second conveying trolley 15 move forward and convey the first tube 11 and the second tube 14, and the socket 19 (one end) of the first tube 11 is inserted into the socket 20 (the other end) of the last tube 4 of the pipeline 2 and connected thereto.

[0178] At this time, the connecting member 28 is hidden under the first pipe 11 and the second pipe 14. In addition, by adjusting the vertical position of the first pipe 11 using the carriage jack 25 of the first transport carriage 12, centering can be performed during joining.

[0179] Then, if Fig.19 , Fig.37 , Fig.38 As shown, two lifting fixtures 80 are installed at the lower part of the open end of the socket 20 of the first pipe 11, and the pressure heads 84 of the jacks 83 of the two lifting fixtures 80 are extended to lift the socket 20 (the other end) of the first pipe 11. As a result, the first pipe 11 floats above the first transport vehicle 12.

[0180] Then, if Fig.39 As shown, the bicycle 9 is moved backward and the tube conveying device 10 is moved rearward, and the first conveying carriage 12 is pulled out from below the first tube 11 toward the front side of the first tube 11 .

[0181] Then, if Fig.40 As shown, the connecting member 28 is removed and the first connecting member 29 is separated from the second connecting member 30. Figure 7 As shown by the imaginary line, the first connecting pin 32 is removed and the connection between the first connecting member 29 and the first transport trolley 12 is released, as shown in FIG. Fig.10 As shown by the imaginary line of , the relay connecting pin 33 is removed and the connection between the first connecting member 29 and the second connecting member 30 is released, so that the first connecting member 29 is separated from between the first conveying carriage 12 and the second connecting member 30. In this way, the first connecting pin 32 can be removed and the first connecting member 29 can be separated from the first conveying carriage 12 in a manner that the first tube 11 does not become an obstacle.

[0182] Afterwards, if Fig.13 , Fig.14As shown, the operating lever 45 is operated to switch from the connection position P3 to the separation position P4. As a result, the engagement pin 36 is switched from the engagement position P1 to the separation position P2, and the connection between the second connection member 30 and the second conveying trolley 15 can be released by remote operation, the second connection member 30 is separated from the second conveying trolley 15, and the connection member 28 is removed from between the first conveying trolley 12 and the second conveying trolley 15, so that the first conveying trolley 12 and the second conveying trolley 15 are separated.

[0183] like Fig.13 As shown in the figure, since the operation of the operating lever 45 can be performed at a position away from the engagement pin 36, that is, in an empty space in front of the insertion port 19 of the second tube 14, the engagement pin 36 can be switched from the engagement position P1 to the disengagement position P2 by remote operation. Therefore, when the engagement pin 36 is switched from the engagement position P1 to the disengagement position P2, the second tube 14 on the second transport carriage 15 does not hinder the switching.

[0184] Therefore, even when the space below the second tube 14 placed on the second transport cart 15 is narrow, the connection between the other end of the connecting member 28 and the second transport cart 15 can be easily released by operating the operating lever 45. Thus, the time and effort required for removing the connecting member 28 and separating the first transport cart 12 from the second transport cart 15 can be reduced.

[0185] In addition, if Fig.40 As shown in FIG. 1 , the first connecting member 29 and the second connecting member 30 removed as described above are moved and temporarily stored in the first pipe 11 .

[0186] Afterwards, if Figure 32 to Figure 34 , Fig.41 As shown, the auxiliary rail device 101 is set in the second tube 14 on the second transport cart 15. At this time, the horizontal rail part 105 is set in the second tube 14, and the inclined rail part 104 is installed at the front end of the horizontal rail part 105 and protrudes forward from the insertion hole 19 of the second tube 14. Thus, the auxiliary rail device 101 is set to branch upward from the rail 17 on the front side of the first tube 11 and extend into the second tube 14.

[0187] Afterwards, if Fig.42 As shown, the hook of the wire rope 107 provided on the bicycle 9 is hooked on the empty first transport trolley 12, and the winch 108 is operated to wind up the wire rope 107. As a result, the first transport trolley 12 is pulled by the wire rope 107 and moves backward from the front side of the first tube 11, and is transferred from the track 17 to the auxiliary track device 101, as shown in FIG. Fig.32 , Fig.33 , Fig.35As shown, the tube passes through the inclined track portion 104 and travels on the horizontal track portion 105, and is transferred into the second tube 14, as shown in FIG. Fig.43 As shown, the second tube 14 is housed in a state supported by the horizontal rail portion 105 .

[0188] Then, if Fig.44 As shown, the split rail 18 of the rail 17 below the first pipe 11 is removed and placed on the temporary placement plate 26 of the first transport trolley 12 in the second pipe 14. In addition, the first connecting member 29 and the second connecting member 30 are moved from the first pipe 11 to the first transport trolley 12 in the second pipe 14.

[0189] Then, if Fig.45 As shown, a support member 63 such as an H-shaped steel is provided below the end portion on the spigot side of the first tube 11, and the pressure head 84 of the jack 83 of the lifting fixture 80 is shortened, so that the spigot side end portion (the other end portion) of the first tube 11 is lowered onto the support member 63 and supported by the support member 63. After that, the two lifting fixtures 80 are removed from the open end portion of the spigot 20 of the first tube 11, and are moved and temporarily stored in the second tube 14. Since the spigot side end portion of the first tube 11 is supported by the support member 63 as described above, the spigot side end portion of the first tube 11 can be prevented from deviating downward.

[0190] The inclined rail portion 104 of the auxiliary rail device 101 is removed from the horizontal rail portion 105 and temporarily stored in the second pipe 14. The inclined rail portion 104 corresponds to the inclined portion of the auxiliary rail device 101 branching from the rail 17 and protruding forward from the socket 19 of the second pipe 14.

[0191] Afterwards, if Fig.46 As shown, the bicycle 9 is advanced to move the second transport cart 15 forward, and the socket 19 of the second tube 14 on the second transport cart 15 is joined to the socket 20 of the first tube 11 joined to the last tube 4 .

[0192] At this time, by adjusting the up-and-down position of the second pipe 14 using the carriage jack 25 of the second transport carriage 15 , centering can be performed during joining.

[0193] Afterwards, if Fig.47 As shown, two lifting clamps 80 are installed at the lower part of the open end of the socket 20 of the second pipe 14, and the socket 20 (the other end) of the second pipe 14 is lifted by the lifting clamps 80. As a result, the second pipe 14 floats above the second transport trolley 15. Then, the self-propelled vehicle 9 and the second transport trolley 15 are moved backward, and the second transport trolley 15 is pulled out from under the second pipe 14 to the front side of the second pipe 14 and is moved backward to the rear of the second pipe 14.

[0194] Then, if Fig.48 As shown, the split rail 18 of the rail 17 below the second pipe 14 is removed and placed on the temporary placement plate 26 of the second transport carriage 15. In addition, a support member 63 such as an H-shaped steel is provided below the end portion on the socket side of the second pipe 14, and the pressure head 84 of the jack 83 of the lifting fixture 80 is shortened, so that the end portion on the socket side (the other end portion) of the second pipe 14 is lowered onto the support member 63 and supported by the support member 63. Thereafter, the two lifting fixtures 80 are removed from the open end portion of the socket 20 of the second pipe 14.

[0195] Afterwards, if Fig.49 As shown, the inclined rail portion 104 is installed on the rear end of the horizontal rail portion 105 and is made to protrude rearward from the insertion opening 20 of the second pipe 14 , so that the rear end of the inclined rail portion 104 is connected to the rail 17 .

[0196] Then, if Fig.50 As shown, the hook of the wire rope 107 of the bicycle 9 is hooked on the first transport trolley 12 in the second tube 14, and the winch 108 is operated to roll up the wire rope 107. As a result, the first transport trolley 12 retreats to the horizontal track portion 105 in the second tube 14 and descends from the inclined track portion 104 to the track 17.

[0197] Thus, the first pipe 11 and the second pipe 14 are joined to each other at the last pipe 4 of the pipeline 2 , and the above joining process is repeated, thereby extending the pipeline 2 in the pipeline laying tunnel 1 .

[0198] In the first and second embodiments described above, Fig.11 As shown, an engaging pin 36 (an example of an engaging member) that can be freely engaged with and disengaged from the second conveyor trolley 15 is provided at the other end of the connecting member 28 (i.e., the second connecting member 30), and a switching device 37 is provided at the second connecting member 30. However, it is also possible that an engaging pin 36 (an example of an engaging member) that can be freely engaged with and disengaged from the first conveyor trolley 12 is provided at one end of the connecting member 28 (i.e., the first connecting member 29), and the switching device 37 is provided at the first connecting member 29.

[0199] According to this, by operating the operating lever 45 and activating the switching device 37, the engaging pin 36 is switched from the engaging position P1 to the disengaging position P2, and the connection between the first transport cart 12 and the connecting member 28 is released. At this time, since the operating lever 45 can be operated in a manner that does not interfere with the first tube 11 and the second tube 14, even if the space below the first tube 11 placed on the first transport cart 12 is narrow, the connection between the first transport cart 12 and the connecting member 28 can be easily released by operating the operating lever 45. As a result, the time and labor required for the operation of removing the connecting member 28 and separating the first transport cart 12 from the second transport cart 15 can be reduced.

[0200] In addition, a first engaging pin that can be freely engaged and disengaged with the first conveyor trolley 12 can be provided at one end of the connecting member 28, and a second engaging pin that can be freely engaged and disengaged with the second conveyor trolley 15 can be provided at the other end of the connecting member 28, and a first switching device for switching the first engaging pin from an engaged state to a disengaged state and a second switching device for switching the second engaging pin from an engaged state to a disengaged state can be provided on the connecting member 28.

[0201] In the above-mentioned embodiments, the socket 19 of another pipe is inserted into the socket 20 of the pipe joined to the pipe 2 and the pipes are joined together. However, the socket 20 of another pipe may be inserted into the socket 19 of the pipe joined to the pipe 2 and the pipes may be joined together.

[0202] In the above-described embodiments, the coil spring 54 is provided on the connecting plate 27 of the second transport cart 15 , but the coil spring 54 may not be provided.

[0203] In the above embodiment, each of the tubes 4 , 11 , 14 has the socket 19 at one end and the socket 20 at the other end. However, the present invention is also applicable to the case of joining tubes having only one of the socket 19 and the socket 20 .

Claims

1. A method for joining pipes in a pipeline laying tunnel, wherein a first pipe is placed on a first conveying trolley of a pipe conveying device having a first conveying trolley and a second conveying trolley that can freely travel on a rail in the pipeline laying tunnel, a second pipe is placed on a second conveying trolley connected to the first conveying trolley via a connecting member, the first pipe and the second pipe are conveyed, and the first pipe and the second pipe are joined in sequence at the last pipe in the pipeline laying tunnel, wherein: The first conveying carriage carrying the first tube and the second conveying carriage carrying the second tube are moved forward to join one end of the first tube to the other end of the last tube. The other end of the first pipe is lifted, the first transport trolley and the second transport trolley are moved backward, and the first transport trolley is pulled out from under the first pipe to the front side of the first pipe. Remove the connecting member and separate the first conveying trolley from the second conveying trolley. By lifting the second pipe placed on the second transport carriage, the space below the second pipe is expanded, and the second pipe is centered relative to the first pipe. The first transport trolley is moved backward and pulled into the expanded space below the second tube placed on the second transport trolley. The second tube on the second transport cart is advanced by advancing the second transport cart together with the first transport cart, and one end of the second tube on the second transport cart is joined to the other end of the first tube joined to the last tube. The other end of the second pipe is lifted, the first transport cart and the second transport cart are moved backward, and the first transport cart and the second transport cart are pulled out from below the second pipe toward the front side of the second pipe.

2. The method for joining pipes in a pipeline laying tunnel according to claim 1, characterized in that: After the other end of the first pipe is lifted and the first and second conveyor carts are moved backward to pull the first conveyor cart out from under the first pipe to the front side of the first pipe, the rail under the first pipe connected to the last pipe is removed and placed on the first conveyor cart. Remove the connecting member and separate the first conveying trolley from the second conveying trolley. The first transport cart is pulled under the second pipe placed on the second transport cart together with the removed rails.

3. The method for joining pipes in a pipeline laying tunnel according to claim 1 or 2, characterized in that: Move the disassembled connecting member into the second tube.

4. The method for joining pipes in a pipeline laying tunnel according to claim 1 or 2, characterized in that: After the other end of the first pipe is lifted up and the first and second transport carts are moved backward to pull the first transport cart out from below the first pipe to the front side of the first pipe, A support member is provided below the other end of the first pipe. The other end portion of the first pipe is lowered onto the supporting member and supported by the supporting member.

5. The method for joining pipes in a pipeline laying tunnel according to claim 1 or 2, characterized in that: After the connecting member is removed and the first transport trolley is separated from the second transport trolley, The first transport cart is pulled under the second pipe while the second pipe placed on the second transport cart is lifted by the lifting device provided on the second transport cart.

6. The method for joining pipes in a pipeline laying tunnel according to claim 1 or 2, characterized in that: When the connecting member is removed and the first transport trolley is separated from the second transport trolley, one end of the connecting member is separated from the first transport trolley. The operation portion provided on the connection member is operated to release the connection between the other end portion of the connection member and the second transport vehicle, thereby removing the connection member from between the first transport vehicle and the second transport vehicle.

7. A pipe conveying device for conveying pipes, characterized in that: The pipe conveying device comprises a first conveying trolley for conveying a first pipe, a second conveying trolley for conveying a second pipe, and a connecting device for connecting the first conveying trolley and the second conveying trolley. The connecting device includes a connecting member, one end of which is detachably mounted on and off the first transport trolley and the other end of which is detachably mounted on and off the second transport trolley. An engaging member that can be engaged with or disengaged from either the first transport trolley or the second transport trolley is provided at an end of the connecting member. The engaging member can be switched between an engaged state in which it is engaged with one of the transport carts and a disengaged state in which it is disengaged from one of the transport carts. The connecting member is provided with a switching device for switching the engaging member from an engaged state to a disengaged state. The switching device comprises: a linkage rod extending in the tube axis direction and being slidable in the tube axis direction; and an operating part connected to one end of the linkage rod and used to operate the switching device from the outside. The operating part is exposed to the space formed between the first tube carried on the first conveying trolley and the second tube carried on the second conveying trolley. By operating the operating part in the space, the linkage rod slides along the tube axis in linkage, and the other end of the linkage rod switches the engaging member from the engaged state to the disengaged state.

8. The tube conveying device according to claim 7, characterized in that The engaging member is switched to the disengaged state by dropping it from the engaged state.

9. The pipe conveying device according to claim 7 or 8, characterized in that: One of the transport carts is provided with a biasing member that biases the engagement member from the engaged state to the disengaged state.

10. The pipe conveying device according to claim 7 or 8, characterized in that: The connecting member can be divided into a first connecting member and a second connecting member. The first connecting member is detachably connected to the first transport vehicle. The engaging member and the switching device are arranged on the second connecting member. The engaging member can be switched between an engaged state in which it is engaged with the second transport cart and a disengaged state in which it is disengaged from the second transport cart.

11. A method for joining pipes in a pipeline laying tunnel, characterized in that: The pipe joining method is for joining a first pipe and a second pipe in sequence at the last pipe of a pipe in a pipe laying tunnel using the pipe conveying device according to any one of claims 7 to 10. In the method for joining pipes in a pipe laying tunnel, a first pipe is placed on a first conveying trolley of a pipe conveying device having a first conveying trolley and a second conveying trolley that can freely travel on a steel rail in the pipe laying tunnel, a second pipe is placed on the second conveying trolley connected to the first conveying trolley via a connecting member, the first pipe and the second pipe are conveyed, and the first pipe and the second pipe are joined in sequence at the last pipe in the pipe laying tunnel. The first conveying carriage carrying the first tube and the second conveying carriage carrying the second tube are moved forward to join one end of the first tube to the other end of the last tube. The other end of the first pipe is lifted, the first transport trolley and the second transport trolley are moved backward, and the first transport trolley is pulled out from under the first pipe to the front side of the first pipe. Remove the connecting member and separate the first conveying trolley from the second conveying trolley. An auxiliary rail device is provided, the auxiliary rail device branching from the rail on the front side of the first pipe and extending into the second pipe placed on the second transport cart, The first transport vehicle is moved backward from the front side of the first pipe, and is driven on the auxiliary rail device and transferred from the rail to the second pipe. Remove the inclined portion of the auxiliary rail device that branches off from the rail and protrudes forward from one end of the second pipe. The second transport cart is moved forward, and one end of the second tube on the second transport cart is joined to the other end of the first tube joined to the last tube.

Images