Buffering structure of jacking pipe connector

Abstract

The utility model is suitable for the technical field of pipe jacking construction, and provides a pipe jacking connector buffering structure which comprises two jacking pipes and a buffering sealing mechanism arranged between the two jacking pipes, and the buffering sealing mechanism comprises a sealing frame which is fixedly connected to the rear end of one jacking pipe and matched with the outline of the side face of the jacking pipe. A plurality of through holes are transversely formed in the surface of one side of the sealing frame in a penetrating mode. According to the jacking pipe connector buffering structure, by arranging the multiple rigid supporting structures, in the jacking pipe pushing process, large extrusion force can be generated between the two jacking pipes, so that a sealing frame in the buffering sealing mechanism is compressed, meanwhile, a first supporting disc and a second supporting disc in the rigid supporting structures get close to each other, and therefore the sealing effect is improved. And when the spring in the rigid supporting structure is compressed to the maximum degree, the whole rigid supporting structure cannot be continuously compressed, and the rigid supporting structure serves as a supporting structure to prevent the sealing frame from being continuously extruded and deformed, so that the sealing frame is prevented from being excessively deformed and damaged due to extrusion.

Description

Technical Field

[0001] This utility model belongs to the field of pipe jacking construction technology, and in particular relates to a pipe jacking interface buffer structure. Background Technology

[0002] Pipe jacking is a trenchless construction technique. Its main principle involves using back jacks to push prefabricated pipe sections into the ground, forming the required tunnel. Pipe jacking is further divided into manual jacking and mechanical jacking methods depending on the excavation method. Regardless of the excavation method, the direct interaction between the pipe section and the ground creates frictional resistance that hinders the jacking process. Therefore, thixotropic grout drag reduction technology has become a common practice in pipe jacking projects. The main principle of thixotropic grout drag reduction technology is as follows: during pipe jacking, thixotropic grout is injected into the outer wall of the pipe through grouting holes, forming a "grout sleeve" with a low coefficient of friction around the pipe section. This not only reduces the thrust required for jacking but also minimizes ground disturbance and improves construction safety.

[0003] In pipe jacking construction, a sealing strip is installed between every two pipes to seal the gap between them. However, the pipes are constantly being squeezed during installation, and the joint between the pipes is subjected to very high pressure, which may cause the sealing strip to deform excessively and become damaged. Summary of the Invention

[0004] This utility model provides a buffer structure for the jacking pipe interface, which aims to solve the problem that the jacking pipe is constantly squeezed during installation, and the jacking pipe and jacking pipe interface position has to withstand very large extrusion force, which may cause excessive deformation and damage to the sealing strip.

[0005] This utility model is implemented as follows: a jacking pipe interface buffer structure includes two jacking pipes and a buffer sealing mechanism disposed between them; the buffer sealing mechanism includes a sealing frame fixedly connected to the rear end of one of the jacking pipes and adapted to its side profile, a plurality of through holes are opened laterally through one side surface of the sealing frame, both ends of the plurality of through holes are expanded outward to form expansion grooves, and a rigid support structure is provided inside the plurality of through holes.

[0006] Preferably, all of the rigid support structures are identical, and one of the rigid support structures includes a first support plate and a second support plate fixedly connected to the outer expansion grooves at both ends. A horizontal tube is fixedly connected to the inner end of the second support plate, and a sliding column is slidably connected to the inside of the horizontal tube. The outer end of the sliding column is fixedly connected to the inner end surface of the first support plate, and a spring is fixedly connected between the inner end of the sliding column and the inner end surface of the second support plate.

[0007] Preferably, the first support plate and the sliding column are integrally formed, and the second support plate and the horizontal tube are integrally formed.

[0008] Preferably, the sealing frame is made of rubber.

[0009] Preferably, the outer surface of the sealing frame is provided with an expansion layer.

[0010] Preferably, the central axes of the first support plate, the second support plate, the horizontal tube, the sliding column, and the spring in one of the rigid support structures are located on the same straight line.

[0011] Beneficial effects

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The jacking pipe interface buffer structure of this utility model, by setting multiple rigid support structures, generates a large compressive force between the two jacking pipes during the jacking process, thereby causing the sealing frame in the buffer sealing mechanism to be compressed. At the same time, the first support plate and the second support plate in the rigid support structure move closer to each other until the spring in the rigid support structure is compressed to the maximum extent. At this point, the rigid support structure as a whole cannot be compressed further. As a support structure, it prevents the sealing frame from being further squeezed and deformed, thus avoiding damage to the sealing frame due to excessive compression deformation. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of the buffer sealing mechanism of this utility model;

[0014] Figure 2 This is a cross-sectional schematic diagram of the rigid support structure in this utility model;

[0015] Figure 3 This is a schematic diagram of the actual use of this utility model.

[0016] In the figure: 1-jacking pipe, 2-buffer sealing mechanism, 21-sealing frame, 22-expansion layer, 23-through hole, 24-outer expansion groove, 25-first support plate, 26-second support plate, 27-horizontal pipe, 28-sliding column, 29-spring. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] Please see Figure 1-3This utility model provides a technical solution: a jacking pipe interface buffer structure, including two jacking pipes 1 and a buffer sealing mechanism 2 disposed between them; the buffer sealing mechanism 2 includes a sealing frame 21 fixedly connected to the rear end of one jacking pipe 1 and adapted to its side profile, a plurality of through holes 23 are transversely opened on one side surface of the sealing frame 21, both ends of the plurality of through holes 23 are expanded outward to form an expansion groove 24, and a rigid support structure is provided inside the plurality of through holes 23.

[0019] The sealing frame 21 is made of rubber.

[0020] In this embodiment, the sealing frame 21 is made of rubber and can achieve a sealing effect between the two top pipes 1. Its internal rigid support structure can provide a certain degree of protection for the sealing frame 21.

[0021] Furthermore, the structures of the multiple rigid support structures are all identical. One of the rigid support structures includes a first support plate 25 and a second support plate 26, which are respectively fixedly connected to the outer expansion grooves 24 at both ends. A horizontal tube 27 is fixedly connected to the inner end of the second support plate 26, and a sliding column 28 is slidably connected to the inside of the horizontal tube 27. The outer end of the sliding column 28 is fixedly connected to the inner end surface of the first support plate 25, and a spring 29 is fixedly connected between the inner end of the sliding column 28 and the inner end surface of the second support plate 26.

[0022] The central axes of the first support plate 25, the second support plate 26, the horizontal tube 27, the sliding column 28, and the spring 29 in a rigid support structure are located on the same straight line.

[0023] In this embodiment, during the pushing process of the jacking pipe 1, a large compressive force is generated between the two jacking pipes 1, which causes the sealing frame 21 in the buffer sealing mechanism 2 to be compressed. At the same time, the first support plate 25 and the second support plate 26 in the rigid support structure move closer to each other, and the horizontal pipe 27 and the sliding column 28 between them will also move in opposite directions. The spring 29 is compressed in this process. When the spring 29 in the rigid support structure is compressed to the maximum extent, the rigid support structure as a whole cannot be compressed further. As a support structure, it prevents the sealing frame 21 from being further squeezed and deformed, thus avoiding damage to the sealing frame 21 due to excessive compression deformation.

[0024] When the sealing frame 21 is reset, the rigid support structure can also be reset under the action of the spring 29, which will not affect the reset of the sealing frame 21.

[0025] Furthermore, the first support plate 25 and the sliding column 28 are integrally formed, and the second support plate 26 and the horizontal tube 27 are integrally formed.

[0026] In this embodiment, the first support plate 25 and the sliding column 28 are integrally formed, and the second support plate 26 and the horizontal tube 27 are integrally formed, which can ensure the structural stability of the two components of the structure, thereby ensuring the support effect of the structure.

[0027] Furthermore, an expansion layer 22 is provided on the outer surface of the sealing frame 21.

[0028] In this embodiment, the expansion layer 22 is made of expandable rubber, which expands when it comes into contact with water, thereby improving the sealing effect. Expandable rubber is existing technology and will not be described in detail here.

[0029] The working principle and usage process of this utility model: After the utility model is installed, during the pushing process of the jacking pipe 1, a large compressive force will be generated between the two jacking pipes 1, which will cause the sealing frame 21 in the buffer sealing mechanism 2 to be compressed. At the same time, the first support plate 25 and the second support plate 26 in the rigid support structure will move closer to each other, and the horizontal pipe 27 and the sliding column 28 between them will also move in opposite directions. The spring 29 is compressed in this process. When the spring 29 in the rigid support structure is compressed to the maximum extent, the rigid support structure as a whole cannot be compressed further. As a support structure, it prevents the sealing frame 21 from being squeezed and deformed, thus avoiding damage to the sealing frame 21 due to excessive compression deformation.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pipe jacking interface buffer structure, characterized by: It includes two jacking pipes (1) and a buffer sealing mechanism (2) disposed between them; The buffer sealing mechanism (2) includes a sealing frame (21) fixedly connected to the rear end of the top pipe (1) and adapted to its side profile. A plurality of through holes (23) are opened horizontally on one side surface of the sealing frame (21). Both ends of the plurality of through holes (23) are expanded outward to form an expansion groove (24). A rigid support structure is provided inside the plurality of through holes (23).

2. A pipe jacking interface buffer structure as claimed in claim 1, wherein: The rigid support structures are all identical. One of the rigid support structures includes a first support plate (25) and a second support plate (26) fixedly connected to the outer expansion groove (24) at both ends. A horizontal tube (27) is fixedly connected to the inner end of the second support plate (26). A sliding column (28) is slidably connected to the inside of the horizontal tube (27). The outer end of the sliding column (28) is fixedly connected to the inner end surface of the first support plate (25). A spring (29) is fixedly connected between the inner end of the sliding column (28) and the inner end surface of the second support plate (26).

3. A pipe jacking interface buffer structure as claimed in claim 2, wherein: The first support plate (25) and the sliding column (28) are integrally formed, and the second support plate (26) and the horizontal tube (27) are integrally formed.

4. A pipe joint buffer structure as claimed in claim 1, characterized in that: The sealing frame (21) is made of rubber.

5. A pipe joint buffer structure as claimed in claim 1, characterized in that: An expansion layer (22) is provided on the outer surface of the sealing frame (21).

6. A pipe joint buffer structure as claimed in claim 2, characterized in that: The central axes of the first support plate (25), the second support plate (26), the horizontal tube (27), the sliding column (28) and the spring (29) in the rigid support structure are located on the same straight line.

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