Glue injection hole structure of jacking pipe

Abstract

The utility model is applicable to the technical field of jacking pipe glue injection holes, and provides a glue injection hole structure of a jacking pipe, which comprises a jacking pipe main body and a prefabricated hole arranged on the jacking pipe main body, the inner side surface of the jacking pipe main body is fixedly connected with a fixing ring corresponding to the prefabricated hole through an expansion screw, and the outer side surface of the fixing ring is fixedly connected with a connecting seat. A sealing disc is hinged to the outer end of the connecting base, an extending piece is fixedly connected to the other end of the sealing disc, a strip-shaped through groove is formed in the outer surface of the extending piece in a penetrating mode, and a rotating column corresponding to the through groove is rotationally connected to the other side of the outer surface of the fixing ring. According to the glue injection hole structure of the jacking pipe, by arranging the fixing ring and the sealing disc, when a glue injection hole needs to be blocked, the sealing disc is opened and then cement mortar is injected into the sealing disc, after the sufficient amount of cement mortar is injected, the sealing disc is closed and fixed through the clamping strip, and at the moment, the sealing disc can seal the inner end of the glue injection hole; the loss of the cement mortar is prevented, so that the construction convenience is improved.

Description

Technical Field

[0001] This utility model belongs to the field of jacking pipe injection hole technology, and particularly relates to an injection hole structure for jacking pipe. 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] After the pipe jacking construction is completed, the grouting holes need to be sealed to ensure the sealing and compressive strength of the pipe sections. The traditional method of sealing the grouting holes is to use micro-expansion cement mortar to densely fill the grouting holes. However, the structure of the prefabricated grouting holes for pipe jacking is relatively simple, and the underground environment is often quite humid. After the cement mortar is injected into the grouting hole, it dries slowly and is easy to be lost, which is inconvenient for construction. Summary of the Invention

[0004] This utility model provides a glue injection hole structure for jacking pipes, aiming to solve the problems that the general prefabricated glue injection hole structure for jacking pipes is relatively simple, and the underground environment is often humid, so the cement mortar dries slowly after being injected into the glue injection hole and is easy to be lost, which is inconvenient for construction.

[0005] This utility model is implemented as follows: a glue injection hole structure for a jacking pipe includes a jacking pipe body and a pre-drilled hole formed thereon; a fixing ring corresponding to the pre-drilled hole is fixedly connected to the inner surface of the jacking pipe body by an expansion screw; a connecting seat is fixedly connected to the outer surface of the fixing ring; a sealing disc is hinged to the outer end of the connecting seat; an extension piece is fixedly connected to the other end of the sealing disc; a strip-shaped through groove is formed through the outer surface of the extension piece; a rotating column corresponding to the through groove is rotatably connected to the other side of the outer surface of the fixing ring; and a retaining strip adapted to the inner contour of the through groove is fixedly connected to the outer end of the rotating column.

[0006] Preferably, the outer diameter of the sealing disc is larger than the inner diameter of the fixing ring.

[0007] Preferably, a connecting ring is fixedly connected inside the pre-drilled hole, a plurality of connecting posts are fixedly connected to the outer end surface of the connecting ring, sliders are slidably connected to the outer surfaces of the plurality of connecting posts, connecting pieces are fixedly connected between the plurality of sliders, and a sealing block adapted to the inner diameter of the connecting piece is fixedly connected to the inner end surface of the connecting piece.

[0008] Preferably, each of the plurality of sliders is fixedly connected to the outer end surface of the connecting ring with a tension spring.

[0009] Preferably, the sealing block is made of rubber.

[0010] Preferably, the central axes of the pre-drilled hole, the connecting ring, the fixing ring, and the sealing disc are all 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 glue injection hole structure of the jacking pipe of this utility model, by setting a fixing ring and a sealing plate, when it is necessary to seal the glue injection hole, the sealing plate is opened and cement mortar is injected into it. After injecting a sufficient amount, the sealing plate is closed and fixed by the clamping strip. At this time, the sealing plate can seal the inner end of the glue injection hole and prevent cement mortar from flowing out, thereby improving the convenience of construction. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the external structure of the sealing structure of this utility model;

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

[0015] Figure 3 This is a schematic diagram of the main structure of the jacking pipe of this utility model.

[0016] In the diagram: 1-jacking pipe body, 2-prefabricated hole, 3-fixing ring, 4-connecting seat, 5-sealing plate, 6-extension plate, 7-through groove, 8-clamping strip, 9-connecting ring, 10-connecting column, 11-slider, 12-tension spring, 13-connecting plate, 14-sealing block. 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 injection hole structure, including a jacking pipe body 1 and a pre-drilled hole 2 opened thereon; the inner surface of the jacking pipe body 1 is fixedly connected to a fixing ring 3 corresponding to the pre-drilled hole 2 by expansion screws, the outer surface of the fixing ring 3 is fixedly connected to a connecting seat 4, the outer end of the connecting seat 4 is hinged to a sealing disc 5, the other end of the sealing disc 5 is fixedly connected to an extension piece 6, the outer surface of the extension piece 6 is provided with a strip-shaped through groove 7, the other side of the outer surface of the fixing ring 3 is rotatably connected to a rotating column corresponding to the through groove 7, and the outer end of the rotating column is fixedly connected to a retaining strip 8 adapted to the inner contour of the through groove 7.

[0019] In this embodiment, when it is necessary to seal the precast hole 2, the sealing disc 5 is opened and cement mortar is injected into it. After a sufficient amount is injected, the sealing disc 5 is closed and fixed by the clamping strip 8. At this time, the sealing disc 5 can seal the inner end of the precast hole 2 to prevent the cement mortar from flowing out, thereby improving the convenience of construction.

[0020] The sealing disc 5 is installed on the outside of the fixing ring 3 by means of hinge. When it needs to be closed, it is rotated to the horizontal position of the fixing ring 3, at which time it can seal the fixing ring 3. At the same time, the retaining strip 8 will pass through the through groove 7 opened on the extension piece 6. At this time, rotating the retaining strip 8 at a certain angle can limit and fix the other end of the sealing disc 5, so that it maintains the closed and sealed state of the fixing ring 3.

[0021] Furthermore, the outer diameter of the sealing disc 5 is larger than the inner diameter of the fixing ring 3.

[0022] In this embodiment, the outer diameter of the sealing disc 5 must be larger than the inner diameter of the fixing ring 3 in order to achieve a sealing effect.

[0023] Furthermore, a connecting ring 9 is fixedly connected inside the pre-drilled hole 2, and multiple connecting posts 10 are fixedly connected to the outer end surface of the connecting ring 9. Slider 11 is slidably connected to the outer surface of each of the multiple connecting posts 10. A connecting piece 13 is fixedly connected between the multiple sliders 11, and a sealing block 14 that matches the inner diameter of the connecting ring 9 is fixedly connected to the inner end surface of the connecting piece 13.

[0024] Multiple sliders 11 are fixedly connected to the outer end surface of the connecting ring 9 by tension springs 12.

[0025] The central axes of the pre-drilled hole 2, connecting ring 9, fixing ring 3 and sealing disc 5 are all located on the same straight line.

[0026] In this embodiment, the structure forms a one-way valve structure inside the pre-formed hole 2. When material is injected outward from the inner end of the pre-formed hole 2, the pressure will push the sealing block 14 outward. At this time, a gap will be generated between the connecting ring 9 and the sealing block 14, and the material will flow outward through this gap. When the external material flows into the interior of the pre-formed hole 2, it will exert inward pressure on the connecting piece 13, causing the sealing block 14 to move in the direction of the connecting ring 9. This will cause the sealing block 14 to be more tightly connected to the outer end of the connecting ring 9, making it impossible to pass through, thereby restricting the flow direction of the material.

[0027] The tension spring 12 can quickly pull the connecting piece 13 and the sealing block 14 inward to ensure their sealing effect.

[0028] Furthermore, the sealing block 14 is made of rubber.

[0029] In this embodiment, the rubber material has a certain elastic deformation capability, which allows it to fit more tightly with the connecting ring 9 and ensure a sealing effect.

[0030] The working principle and usage process of this utility model are as follows: After the utility model is installed, when it is necessary to seal the precast hole 2, the sealing disc 5 is opened and cement mortar is injected into it. After injecting a sufficient amount, the sealing disc 5 is closed and fixed by the clamping strip 8. At this time, the sealing disc 5 can seal the inner end of the precast hole 2 to prevent the cement mortar from flowing out, thereby improving the convenience of construction.

[0031] The above are merely preferred embodiments of the present utility model and are 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 glue injection hole structure for a jacking pipe, characterized in that: It includes the main body of the jacking pipe (1) and the prefabricated hole (2) opened on it; The inner surface of the jacking pipe body (1) is fixedly connected with a fixing ring (3) corresponding to the pre-made hole (2) by expansion screws. The outer surface of the fixing ring (3) is fixedly connected with a connecting seat (4). The outer end of the connecting seat (4) is hinged with a sealing plate (5). The other end of the sealing plate (5) is fixedly connected with an extension piece (6). The outer surface of the extension piece (6) is provided with a strip-shaped through groove (7). The other side of the outer surface of the fixing ring (3) is rotatably connected with a rotating column corresponding to the through groove (7). The outer end of the rotating column is fixedly connected with a locking strip (8) that matches the inner contour of the through groove (7).

2. The glue injection hole structure of the jacking pipe as described in claim 1, characterized in that: The outer diameter of the sealing disc (5) is larger than the inner diameter of the fixing ring (3).

3. The injection hole structure for a jacking pipe as described in claim 1, characterized in that: A connecting ring (9) is fixedly connected inside the pre-made hole (2). Multiple connecting posts (10) are fixedly connected to the outer end surface of the connecting ring (9). Sliding blocks (11) are slidably connected to the outer surfaces of the multiple connecting posts (10). A connecting piece (13) is fixedly connected between the multiple sliding blocks (11). A sealing block (14) that matches the inner diameter of the connecting ring (9) is fixedly connected to the inner end surface of the connecting piece (13).

4. The injection hole structure for a jacking pipe as described in claim 3, characterized in that: Each of the multiple sliders (11) is fixedly connected to the outer end surface of the connecting ring (9) with a tension spring (12).

5. The injection hole structure for a jacking pipe as described in claim 3, characterized in that: The sealing block (14) is made of rubber.

6. The glue injection hole structure of the jacking pipe as described in claim 3, characterized in that: The central axes of the pre-drilled hole (2), the connecting ring (9), the fixing ring (3), and the sealing disc (5) are all located on the same straight line.

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