A construction method for laying underground pipelines and a pipeline laying device

Abstract

The present invention discloses a construction method for laying underground pipelines, comprising the following steps: pulling a back-expansion head, a pipe connector, a first section of pipe and a fixed plate into soil; removing the fixed plate, and a pulling device pushing a pull rod in reverse, or the pulling device first pushing the pull rod in reverse and then removing the fixed plate; installing a second section of pipe on the rear side of the first section of pipe, and setting the fixed plate on the rear side of the second section of pipe; the pulling device pulls the back-expansion head and presses the first section of pipe and the second section of pipe together, and then the pulling device pulls the back-expansion head, the first section of pipe and the second section of pipe into the soil, and repeats the steps until all pipes are pulled into the soil. The construction method is simple in steps, improves construction efficiency, occupies less space, and reduces the workload of construction personnel. The present invention also provides a pipeline laying device for implementing the above-mentioned pipe installation method.

Description

[Technical field]

[0001] The invention relates to the field of construction, and in particular to a construction method for laying underground pipelines. The invention also relates to a pipeline laying device. [Background technology]

[0002] like Figure 1 As shown, in the trenchless underground pipeline laying construction, firstly, a first working well 6 and a second working well 7 are respectively excavated on the ground at both ends of the designated route, a traction device 3 is arranged near the first working well 6, and a pipeline laying device 1 is arranged in the second working well 7. The tail of the pipeline laying device 1 is used to fix the pipe 5. The traction device 3 pulls the pipeline laying device 1 through the pull rod 4 and reaches the first working well 6 along the set route. At the same time, a plurality of pipes 5 are successively installed end to end at the tail of the pipeline laying device 1 in the second working well 7. When the pipeline laying device 1 is pulled into the first working well 6, the pipe 5 is just laid on the designated route.

[0003] There is a mutually fitting section between two adjacent pipes 5. Each time a section of pipe 5 is installed, a pressing device is needed to press the later installed pipe 5 against the earlier installed pipe 5 so that the two fit each other. Then the pipe 5 is fixed, and then the pipeline laying device with the pipe 5 installed is pulled forward by the traction device 3 until all the pipes 5 are pulled into the channel 2 to be repaired. Finally, the above steps are repeated in sequence until the entire channel 2 to be repaired is laid. This traditional construction method requires the installation of a pressing device that can press the pipe 5, and the pressing device is fixedly installed. After the construction is completed, the pressing device needs to be removed, which makes the entire construction process have many steps, low construction efficiency, many processes, large space occupation, and a large workload for construction personnel. [Summary of the invention]

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a construction method for laying underground pipelines. The use of this construction method simplifies the steps of the entire construction process, improves construction efficiency, occupies less space, and reduces the workload of construction personnel. The present invention also provides a pipeline laying device for implementing the above-mentioned construction method.

[0005] The present invention is achieved through the following technical solutions:

[0006] A construction method for laying underground pipelines comprises the following steps:

[0007] A. Set the expansion head in the second working well, and use the pulling device to pull the expansion head into the soil through the pull rod;

[0008] B. Set the pipe connector on the rear side of the expansion head and slide it onto the connecting rod;

[0009] C. Install the first section of pipe on the pipe connector, set the fixing plate at the rear of the first section of pipe, and clamp and fix the first section of pipe with the fixing plate and the pipe connector;

[0010] D. The pulling device pulls the expansion head and the first section of the pipe into the soil;

[0011] E. Remove the fixed plate, and the pulling device pushes the pull rod in the reverse direction, or the pulling device first pushes the pull rod in the reverse direction and then removes the fixed plate;

[0012] F. Install the second pipe section at the rear side of the first pipe section, and set the fixing plate at the rear side of the second pipe section;

[0013] G. The pulling device pulls the expansion head and presses the first section of the pipe and the second section of the pipe together, and then the pulling device pulls the expansion head, the first section of the pipe and the second section of the pipe into the soil;

[0014] H. Repeat steps EG until all pipes are pulled into the soil.

[0015] According to the construction method described above, a top plate is arranged on the pulling device and at the rear side of the pipe connector, and the top plate is arranged on the connecting rod so that the top plate can abut against the rear of the pipe connector when the connecting rod moves forward.

[0016] In the construction method described above, the connecting rod is formed by connecting a plurality of connecting rod monomers end to end and splicing them together.

[0017] The present invention also provides a pipeline laying device, including a back-expansion head for connecting a pulling device, a connecting rod being connected to the rear side of the back-expansion head, a pipe connector for connecting pipes being arranged on the rear side of the back-expansion head, the pipe connector being sleeved on the connecting rod and being able to slide back and forth on the connecting rod, a fixing plate being arranged on the rear side of the pipe connector and being able to press the pipe toward the pipe connector and clamp the pipe, a top plate being arranged on the connecting rod and on the rear side of the pipe connector, the top plate being against the rear part of the pipe connector when the connecting rod moves forward, a gap L1 being left between the back-expansion head and the pipe connector, and the gap L1 being greater than or equal to the length L2 of the two pipe sleeve parts.

[0018] In the pipeline laying device as described above, the pipe connector is rotatably connected to the connecting rod, and the top plate is rotatably connected to the connecting rod.

[0019] In the pipeline laying device as described above, the pipe connector is provided with a supporting portion which protrudes toward the rear side and abuts against the top plate when the top plate moves forward.

[0020] In the pipeline laying device as described above, a bearing is arranged in the middle of the top plate, the outer ring of the bearing is connected to the top plate, and the inner ring of the bearing is connected to the connecting rod by interference fit.

[0021] In the pipeline laying device as described above, the bearing is a thrust bearing.

[0022] As described above, the pipe laying device, the pipe connector is provided with a slurry inlet connected to the inner cavity of the pipe, the fixed plate is provided with a slurry discharge port connected to the inner cavity of the pipe, and a spiral blade is provided on the connecting rod and between the pipe connector and the fixed plate.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] 1. The construction method of the present invention can press and fit two adjacent pipes together without the need to set up additional pressing equipment for pushing the pipes, thereby improving construction efficiency, occupying less space, and reducing the workload of construction personnel.

[0025] 2. In step G of the present invention, only the pulling device is needed to pull the fixed plate, and then the pulling device maintains the pulling action until the pipe is pulled into the soil. In the traditional construction method, it is necessary to install a top-pressing device for pushing the pipe in this step and disassemble the top-pressing device after the pipe is fitted. Compared with the traditional construction method, the construction method of the present invention is more convenient.

[0026] 3. A top plate is provided at the rear side of the pipe connector of the present invention. The top plate is provided on the connecting rod and can abut against the rear of the pipe connector when the connecting rod moves forward, thereby preventing pressure from being generated between the fixing plate and the pipe connector and damaging the pipe.

Brief Description of the Drawings

[0027] Figure 1 It is a schematic diagram of the construction process of the present invention. Figure 1 ;

[0028] Figure 2 is a front view of the pipe of the present invention;

[0029] Figure 3 It is a schematic diagram of the construction process of the present invention. Figure 2 ;

[0030] Figure 4 It is a schematic diagram of the construction process of the present invention. Figure 3 ;

[0031] Figure 5 It is a schematic diagram of the construction process of the present invention. Figure 4 ;

[0032] Figure 6 is a cross-sectional view of the pipeline laying device of the present invention;

[0033] Figure 7 It is a partial cross-sectional view of the pipeline laying device of the present invention. [Specific implementation method]

[0034] The present invention will be further described below in conjunction with the accompanying drawings:

[0035] like Figures 1 to 6 As shown, a construction method for laying underground pipelines comprises the following steps:

[0036] A. The expansion head 11 is arranged in the second working shaft 7. The pulling device 3 pulls the expansion head 11 into the soil through the pull rod 4. The expansion head 11 pushes into the soil and digs out a channel for the subsequent pipe 5 to enter.

[0037] B. The pipe connector 12 is arranged at the rear side of the back-expansion head 11 and is slidably sleeved on the connecting rod 14.

[0038] C. Install the first section of the pipe 51 on the pipe connector 12, and set the fixing plate 13 on the rear side of the first section of the pipe 51. The fixing plate 13 and the pipe connector 12 clamp and fix the first section of the pipe 51. As an implementation method, the fixing plate 13 is installed and fixed on the connecting rod 14, thereby pressing the pipe 5.

[0039] D. The pulling device 3 pulls the expansion head 11 and the first section of the pipe 51 into the soil.

[0040] E. Remove the fixing plate 13, and the pulling device 3 pushes the pull rod 4 in the reverse direction. The pull rod 4 pushes the expansion head 11 to move backwards, and the expansion head 11 drives the connecting rod 14 to move backwards. The moving distance of the two depends on the gap L1 between the pipe connector 12 and the expansion head 11.

[0041] F. Install the second section of the pipe 52 at the rear side of the first section of the pipe 51 , and set the fixing plate 13 at the rear side of the second section of the pipe 52 .

[0042] G. The pulling device 3 pulls the expansion head 11 and presses the first section of the pipe 51 and the second section of the pipe 52 together, and then the pulling device 3 pulls the expansion head 11, the first section of the pipe 51 and the second section of the pipe 52 into the soil.

[0043] H. Repeat steps EG until all pipes 5 are pulled into the soil.

[0044] By using the construction method as described above, two adjacent pipes 5 can be pressed and fitted together without setting up a pressing device to push the pipes together, thereby eliminating the tedious steps of installing and disassembling the pressing equipment and manually operating the pressing equipment, improving construction efficiency, occupying less space, and reducing the workload of construction personnel.

[0045] Preferably, if Figure 6 and 7As shown, a top plate 15 is arranged on the pulling device 3 and on the rear side of the pipe connector 12. The top plate 15 is arranged on the connecting rod 14 and can abut against the rear of the pipe connector 12 when the connecting rod 14 moves forward. When the connecting rod 14 moves backward, the pipe connector 12 will not move. When the connecting rod 14 moves forward, it can drive the pipe connector 12 to move forward, thereby preventing the fixing plate 13 from squeezing the pipe 5 and causing damage to the pipe when it moves forward.

[0046] In step B, a gap L1 may be left between the pipe connector 12 and the back-expansion head 11, or a sliding connection structure may be used to allow the back-expansion head 11 and the pull rod 4 to slide a certain distance. Preferably, the gap L1 between the pipe connector 12 and the back-expansion head 11 is consistent with the length L2 of the sleeved portion of the two adjacent pipes 5, so that when the connecting rod 14 moves backward until the back-expansion head 11 abuts against the pipe connector 12, the distance moved by the connecting rod 14 is just the length L of the sleeved portion of the two adjacent pipes 5, and the fixing plate 13 only needs to be installed against the second section of the pipe 52. After the second section of the pipe 52 and the first section of the pipe 51 are sleeved, the top plate 15 just abuts against the rear of the pipe connector 12. If the gap L1 between the pipe connector 12 and the back-expansion head 11 is inconsistent with the length L2 of the sleeved portion of the two adjacent pipes 5, the distance moved by the connecting rod 14 needs to be calculated during construction to deduce the installation position of the fixing plate 13.

[0047] Preferably, if Figure 6 As shown, the connecting rod 14 is formed by connecting a plurality of connecting rod monomers 141 end to end, so that the connecting rod monomers 141 can be installed successively in the second working well 7, thus saving the space required for installation.

[0048] like Figure 6 and Figure 7As shown, the present invention also provides a pipeline laying device, including a back-expanding head 11 for connecting to a pulling device 3, a connecting rod 14 is connected to the rear side of the back-expanding head 11, a pipe connector 12 for connecting a pipe 5 is arranged on the rear side of the back-expanding head 11, the pipe connector 12 is sleeved on the connecting rod 14 and can slide forward and backward on the connecting rod 14, a fixing plate 13 is arranged on the rear side of the pipe connector 12, and the pipe 5 can be pressed toward the pipe connector 12 to clamp and fix the pipe 5, a top plate 15 is arranged on the connecting rod 14 and on the rear side of the pipe connector 12, and the connecting rod 14 moves forward when the connecting rod 14 moves forward. When moving, the top plate 15 abuts against the rear part of the pipe connector 12. Since the pipe connector 12 is slidably sleeved on the connecting rod 14, the connecting rod 14 can move backward relative to the pipe connector 12. After the second section of the pipe 5 is installed and the fixing plate 13 is reinstalled, the connecting rod 14 moves forward. The forward movement of the connecting rod 14 drives the top plate 15 to abut against the pipe connector 12 and push the pipe connector forward, preventing pressure from being generated between the fixing plate 13 and the pipe connector 12. Such a pipeline laying device can be applied to the above-mentioned construction method, so as to achieve the effect of convenient construction and high construction efficiency.

[0049] Because in the actual construction process, the pulling device 3 often drives the expansion head 11 to rotate around the axis and move forward through the pull rod 4, so as a preferred embodiment, Figure 6 and 7 As shown, the pipe connector 12 is rotatably connected to the connecting rod 14, and the top plate 15 is rotatably connected to the connecting rod 14. In more detail, the pipe connector 12 is slidably sleeved on the connecting rod 14, and the top plate 15 is connected to the connecting rod 14 by an interference fit through a bearing 151. The bearing 151 is preferably a thrust bearing, so that the top plate 15 can rotate relative to the connecting rod 14 without affecting the axial movement of the top plate 15 driven by the connecting rod 14.

[0050] Preferably Figure 6 and 7 As shown, the pipe connector 12 is provided with a slurry inlet 121 connected to the inner cavity 500 of the pipe 5, the fixed plate 13 is provided with a slurry discharge port 131 connected to the inner cavity 500 of the pipe 5, and a spiral blade 16 is provided on the connecting rod 14 and between the pipe connector 12 and the fixed plate 13, so that when the connecting rod 14 rotates, the spiral blade 16 can be driven to rotate. As long as the direction of rotation is set, part of the soil in the inner cavity 500 of the pipe 5 can be effectively pushed backwards, and finally the soil is discharged from the slurry discharge port 131.

[0051] In addition, in step A to step C, since the actual construction may be limited by factors such as the environment, equipment and personnel, during construction, the pipe connector 12 in step B and the first section of the pipe 51 in step C can be installed and connected with the fixing plate 13 before completing step A. In this way, the only difference is the order of installing the parts.

[0052] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A construction method for laying underground pipelines, characterized in that: The following steps are involved: A. The expansion head (11) is arranged in the second working well (7), and the pulling device (3) pulls the expansion head (11) into the soil through the pulling rod (4); B. The pipe connector (12) is arranged at the rear side of the expansion head (11) and is slidably mounted on the connecting rod (14); C. Install the first section of the pipe (51) on the pipe connector (12), and set the fixing plate (13) on the rear side of the first section of the pipe (51), so that the fixing plate (13) and the pipe connector (12) clamp and fix the first section of the pipe (51); D. The pulling device (3) pulls the expansion head (11) and the first section of the pipe (51) into the soil; E. The fixing plate (13) is disassembled, and the pulling device (3) pushes the pull rod (4) in the reverse direction, or the pulling device (3) first pushes the pull rod (4) in the reverse direction and then the fixing plate (13) is disassembled; F. Install the second section of the pipe (52) on the rear side of the first section of the pipe (51), and set the fixing plate (13) on the rear side of the second section of the pipe (52); G. The pulling device (3) pulls the expansion head (11) and presses and fits the first section of the pipe (51) and the second section of the pipe (52), and then the pulling device (3) pulls the expansion head (11), the first section of the pipe (51) and the second section of the pipe (52) into the soil; H. Repeat steps EG until all pipes (5) are pulled into the soil.

2. The construction method according to claim 1, characterized in that: A top plate (15) is arranged on the pulling device (3) and at the rear side of the pipe connector (12). The top plate (15) is arranged on the connecting rod (14) so ​​that the top plate (15) can abut against the rear of the pipe connector (12) when the connecting rod (14) moves forward.

3. The construction method according to claim 1, characterized in that: The connecting rod (14) is formed by splicing a plurality of connecting rod monomers (141) connected end to end.

4. A pipeline laying device, characterized in that: It comprises a back-expanding head (11) for connecting to a pulling device (3), a connecting rod (14) being connected to the rear side of the back-expanding head (11), a pipe connector (12) for connecting to a pipe (5) being arranged on the rear side of the back-expanding head (11), the pipe connector (12) being sleeved on the connecting rod (14) and being able to slide forward and backward on the connecting rod (14), a fixing plate (13) being arranged on the rear side of the pipe connector (12) and being able to press the pipe (5) toward the pipe connector (12) and clamp and fix the pipe (5), a top plate (15) being arranged on the connecting rod (14) and on the rear side of the pipe connector (12), and when the connecting rod (14) moves forward, the top plate (15) abuts against the rear of the pipe connector (12); The pipe connector (12) is rotatably connected to the connecting rod (14), and the top plate (15) is rotatably connected to the connecting rod (14); The pipe connector (12) is provided with a supporting portion (122) which protrudes toward the rear side and abuts against the top plate (15) when the top plate (15) moves forward.

5. The pipeline laying device according to claim 4, characterized in that: A bearing (151) is arranged in the middle of the top plate (15); an outer ring of the bearing (151) is connected to the top plate (15); and an inner ring of the bearing (151) is connected to the connecting rod (14) by interference fit.

6. The pipeline laying device according to claim 5, characterized in that: The bearing (151) is a thrust bearing.

7. The pipeline laying device according to claim 4, characterized in that: A gap L1 is left between the back-expanding head (11) and the pipe connector (12), and the gap L1 is greater than or equal to the length L2 of the sleeve connection portion of the two pipes (5).

8. The pipeline laying device according to claim 4, characterized in that: The pipe connector (12) is provided with a slurry inlet (121) connected to the inner cavity (500) of the pipe (5), the fixed plate (13) is provided with a slurry discharge port (131) connected to the inner cavity (500) of the pipe (5), and a spiral blade (16) is provided on the connecting rod (14) and between the pipe connector (12) and the fixed plate (13).

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