Convenient connecting device for soil nail grouting pipe

Abstract

The utility model relates to a convenient connecting device for a soil nail grouting pipe, which comprises an inner pipe, an outer pipe and a connecting device, the inner pipe is hermetically connected in the outer pipe through the connecting device, and the connecting device comprises an extrusion nut, an extrusion ring, a limiting table and a sealing sleeve; a limiting table protruding outwards is arranged at the bottom of the inner pipe, the sealing sleeve is of a deformable structure, the inner pipe is sleeved with the sealing sleeve, the sealing sleeve is located on the limiting table, and the inner pipe is sleeved with the extrusion ring in a sliding mode, and the extrusion ring is located on the upper portion of the sealing sleeve. An external thread section is arranged on the upper portion of the inner pipe, and the extrusion nut is connected to the external thread section in a threaded mode and located on the upper portion of the extrusion ring so as to exert acting force on the extrusion ring from the upper portion, so that the sealing sleeve deforms. The grouting pipe is simple to operate, easy to connect and disassemble, reliable in connection and not easy to loosen, and ensures the safety of construction workers, and the bearing pressure of the grouting pipe is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field, specifically to a convenient connection device for soil nailing grouting pipes. Background Technology

[0002] Soil nailing grouting is a key process in soil nailing support. It involves drilling holes, inserting reinforcing bars (or steel pipes), and injecting cement grout to integrate the soil with the reinforced structure, thereby improving the stability of slopes or foundation pits. This technology is widely used in foundation pit support, slope reinforcement, tunnel engineering, and other fields, offering advantages such as rapid construction, low cost, and strong adaptability.

[0003] Currently, the common method for connecting grouting pipes in soil nailing grouting construction is to attach a grouting joint to the outside of the pipe body and secure it with clamps, wires, or screws. However, this method has the following drawbacks: the connection strength of the grouting pipe structure largely relies on the combination of suitable fittings and sealing sleeves to achieve a seal, resulting in poor sealing performance. Leakage or grout spraying is prone to occur during grouting, leading to material waste and environmental pollution. During high-pressure grouting, if the connection is not secure, the joint may detach, and high-speed splashing grout or metal parts may injure operators. After repeated disassembly and assembly, the clamps are prone to deformation, leading to a decrease in sealing performance and requiring frequent replacement. Therefore, it is necessary to research a convenient connection device for soil nailing grouting pipes. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a convenient connection device for soil nailing grouting pipes, which effectively solves the problem of poor connection sealing of existing grouting pipe connection structures.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a convenient connection device for soil nailing grouting pipes, comprising an inner pipe, an outer pipe, and a connection device. The inner pipe is sealed and connected to the outer pipe through the connection device. The connection device includes a compression nut, a compression ring, a limiting platform, and a sealing sleeve. The bottom of the inner pipe is provided with an outwardly protruding limiting platform. The sealing sleeve is a deformable structure, fitted onto the inner pipe and resting on the limiting platform. The compression ring is slidably fitted onto the outer pipe and resting on the upper part of the sealing sleeve. An external thread section is provided at the upper part of the inner pipe. The compression nut is threadedly connected to the external thread section and located above the compression ring, so as to apply a force to the compression ring from above, thereby deforming the sealing sleeve.

[0006] Furthermore, the sealing sleeve is a rubber sleeve, and multiple sets of clamps are provided inside the sealing sleeve, with the sealing sleeve between the clamps forming a deformation zone.

[0007] Furthermore, the inner wall of the outer tube is provided with a sealing groove to accommodate the deformation of the sealing sleeve.

[0008] Furthermore, the extrusion ring includes a connecting body, an upper pressure ring, and a lower pressure ring. The upper and lower parts of the connecting body are fixed with the upper pressure ring and the lower pressure ring, wherein the upper pressure ring corresponds to the lower part of the extrusion nut, and the lower pressure ring corresponds to the upper part of the sealing sleeve.

[0009] Furthermore, a positioning groove is provided on the lower inner wall of the connector, and a positioning block is provided on the outer side of the inner tube, the positioning block being adapted to the positioning groove.

[0010] Furthermore, the lower part of the compression ring is fixedly connected to the upper part of the sealing sleeve.

[0011] Furthermore, an operating handle is provided on the outer side of the compression nut.

[0012] The beneficial effects of the above technical solution are: This utility model provides a deformable sealing sleeve structure, and fills the gap between the inner tube and the outer tube by the radial deformation of the sealing sleeve, while generating positive pressure with the inner wall of the outer tube to achieve double sealing (contact sealing + pressure sealing), which can withstand higher grouting pressure.

[0013] To provide extrusion pressure, this utility model utilizes the threaded drive of the extrusion nut to provide continuous and stable axial pressure. The extrusion ring evenly transmits the force to the sealing sleeve, avoiding the loosening problem caused by deformation of traditional clamps. This allows the sealing sleeve to deform and fit tightly against the inner wall of the outer pipe. After the sealing sleeve deforms, it forms a frictional self-locking with the inner wall of the outer pipe, making it less prone to breakage during high-pressure grouting. This avoids the risk of jetting caused by sudden pressure increases in traditional joints, ensuring the safety of construction personnel.

[0014] The sealing sleeve is made of rubber, which can recover after deformation and maintain its sealing performance after multiple disassembly and assembly, reducing the frequency of replacement. Furthermore, a hoop ring can be built into the inside. Through the cooperation of the deformable sealing sleeve (built-in hoop ring + deformation area) and the sealing groove, a multi-level sealing structure is formed, which solves the leakage problem caused by traditional clamps / wire fixation.

[0015] When in use, simply rotate and squeeze the nut to tighten or loosen it. The handle design is labor-saving and significantly improves efficiency compared to traditional wire binding or screw fixing. The structure is easy to tighten and disassemble, making it convenient to operate and improving assembly efficiency.

[0016] Therefore, this utility model utilizes a deformable sealing sleeve structure and a threaded force-applying structure to apply extrusion pressure to the sealing sleeve from the outside, forcing the sealing sleeve to deform. The radial deformation (outward protrusion deformation) of the sealing sleeve fills the gap between the inner and outer pipes, forming a dual sealing effect of contact sealing and pressure sealing, which can withstand higher grouting pressure. At the same time, after the sealing sleeve deforms, it rubs against the inner wall of the outer pipe and self-locks, effectively preventing the joint from breaking off during high-pressure grouting. Compared with traditional grouting joints, it is simple to operate, easy to connect and disassemble, ensures that the grouting pipe can bear pressure, and the connection is reliable and not easy to loosen, ensuring the safety of construction workers. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 for Figure 1 Front view structural diagram;

[0019] Figure 3 for Figure 2 Cross-sectional view along the AA direction;

[0020] Figure 4 This is a schematic diagram of the positioning block.

[0021] Figure 5 This is a schematic diagram of the extrusion ring structure;

[0022] Figure 6 This is a schematic diagram of the lower connection structure of the extrusion ring;

[0023] Figure 7 This is a schematic diagram of the implementation structure of the sealing sleeve;

[0024] Figure 8 This is a schematic diagram of the implementation structure of the operating handle.

[0025] Reference numerals: 1-Outer tube, 2-Inner tube, 3-Limiting platform, 4-External thread section, 5-Sealing sleeve, 51-Hoop ring, 52-Deformation zone, 6-Extrusion ring, 61-Connecting body, 62-Upper pressure ring, 63-Lower pressure ring, 64-Sleeve body, 7-Force nut, 71-Internal thread, 72-Anti-friction surface, 73-Notch, 8-Positioning block, 9-Positioning groove, 10-Sealing groove. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0027] Example 1: This example aims to provide a convenient connection device for soil nailing grouting pipes. It is mainly used for connecting the joints of soil nailing grouting pipes. Current grouting joints have a diameter larger than the grouting pipe, are fitted over the outside of the pipe, and are fixed using clamps, screws, or wire. This process is cumbersome, and the connection cannot be completely tight. Grout may spray out at the connection during grouting, or even break open under excessive pressure, posing a safety hazard to operators and wasting materials. Therefore, this example provides a convenient connection device for soil nailing grouting pipes. Compared to traditional grouting joints, it is simple to operate, easy to connect and disassemble, ensures the grouting pipe can withstand pressure, and provides a reliable connection that is not easily loosened, ensuring the safety of construction workers.

[0028] In specific implementation, such as Figure 1-2As shown, a convenient connection device for soil nailing grouting pipes includes an inner pipe 2, an outer pipe 1, and a connection device. In this embodiment, the inner pipe 2 is sealed and connected to the outer pipe 1 through the connection device. The diameter of the outer pipe 1 is slightly larger than the diameter of the grouting pipe, and the inner pipe 2 is slightly smaller than the diameter of the grouting pipe. The inner pipe 2 can be fitted into the outer pipe 1 with a gap, and the connection and sealing of the two are achieved through the connection device.

[0029] In the specific structure, the connecting device includes a compression nut 7, a compression ring 6, a limiting platform, and a sealing sleeve; in this embodiment, both the inner tube 2 and the outer tube 1 are hollow circular tube structures. A limiting platform 3 protruding outward is provided at the bottom of the inner tube 2. The limiting platform 3 has a ring structure and is arranged in a ring at the bottom of the inner tube 2, forming a support platform at the bottom of the inner tube 2. Its function is to support the sealing sleeve from the bottom and form a blocking limit at the bottom of the sealing sleeve 5.

[0030] The sealing sleeve 5 is a deformable structure. The sealing sleeve 5 is fitted onto the inner tube 2 and sits on the limiting platform 3. In this embodiment, a force is applied from above, and the sealing sleeve 5 is squeezed to deform outward. The deformation seals and fills the gap between the inner tube 2 and the outer tube 1. At the same time, the deformed part of the sealing sleeve 5 generates positive pressure with the inner wall of the outer tube 1, thereby generating anti-slip friction force, so as to achieve the sealing and fixed connection between the inner tube 2 and the outer tube 1.

[0031] In order to apply a downward force to the sealing sleeve 5 from above, in this embodiment, the compression ring 6 is slidably fitted onto the outside of the inner tube 2 and located on the upper part of the sealing sleeve 5. In one embodiment, the compression ring 6 is directly pressed on the upper part of the sealing sleeve 5. An external thread section 4 is provided on the upper part of the inner tube 2. The compression nut 7 is threaded onto the external thread section 4 and located on the upper part of the compression ring 6 so as to apply a force to the compression ring 6 from above, thereby deforming the sealing sleeve 5.

[0032] In this embodiment, an operating handle is provided on the outside of the compression nut 7, an internal thread 71 is provided on the inside of the compression nut 7, and an anti-friction 72 and a notch 73 are provided on the outside of the operating handle to facilitate the operator to rotate the compression nut 7.

[0033] In this embodiment, the inner tube 2 is fitted into the outer tube 1, and the relative positions of the inner tube 2 and the outer tube 1 are adjusted. Then, the inner tube 2 is held with one hand, and the compression nut 7 is rotated with the other hand. The compression nut 7 moves downward along the external thread section 4 and pushes the compression ring 6 downward. The lower part of the compression ring 6 compresses the sealing sleeve 5, causing the sealing sleeve 5 to deform outward and fill the gap between the inner tube 2 and the outer tube 1. When the compression nut 7 can no longer be turned, the sealing sleeve 5 is completely sealed and nested between the inner tube 2 and the outer tube 1, realizing the connection and sealing of the inner tube 2 and the outer tube 1. This embodiment utilizes a deformable sealing sleeve structure and a threaded force-applying structure to apply compressive force to the sealing sleeve from the outside, forcing it to deform. The radial deformation (outward protrusion deformation) of the sealing sleeve fills the gap between the inner and outer pipes, forming a dual sealing effect of contact sealing and pressure sealing, which can withstand higher grouting pressure. At the same time, the deformation of the sealing sleeve causes friction and self-locking with the inner wall of the outer pipe, effectively preventing the joint from breaking off during high-pressure grouting. Compared with traditional grouting joints, it is simple to operate, easy to connect and disassemble, ensures the pressure bearing capacity of the grouting pipe, and the connection is reliable and not easy to loosen, ensuring the safety of construction workers.

[0034] Example 2 is basically the same as Example 1, except that the structure of the sealing sleeve 5 is further explained in this example.

[0035] In this embodiment, the sealing sleeve 5 is a rubber sleeve, and multiple sets of clamping rings 51 are provided inside the sealing sleeve 5. The sealing sleeve 5 between the clamping rings 51 is a deformation zone 52. The clamping rings 51 are non-deformation zones, and the sealing sleeve 5 between the clamping rings 51 is a deformation zone. With the force of the compression ring 6, the sealing sleeve 5 contracts downward, the spacing between the clamping rings 51 changes, and the deformation zone is deformed and compressed outward.

[0036] To further ensure the sealing effect, this embodiment provides a sealing groove 10 on the inner wall of the outer tube to accommodate the deformation of the sealing sleeve 5. In specific implementation, the sealing groove 10 can be an arc-shaped groove. After the sealing sleeve 5 is deformed, it is nested in the sealing groove, thereby further increasing the sealing contact surface between the sealing sleeve 5 and the outer tube 1, improving the sealing effect, and also increasing the connection strength to ensure the connection strength between the inner tube 2 and the outer tube 1.

[0037] Example 3 is basically the same as Example 1, except that the structure of the extrusion ring 6 is further explained in this example.

[0038] In this embodiment, the compression ring 6 includes a connecting body 61, an upper compression ring 62, and a lower compression ring 63. The upper compression ring 62 and the lower compression ring 63 are fixed to the upper and lower parts of the connecting body 61, respectively. The upper compression ring corresponds to the lower part of the compression nut 7, and the lower compression ring corresponds to the upper part of the sealing sleeve 5. In terms of implementation structure, the connecting body 61 has a tubular structure and is fitted onto the inner tube 2. The external thread section 4 is located inside the connecting body. Both the upper compression ring and the lower compression ring have annular structures and extend outward from the connecting body.

[0039] A positioning groove 9 is provided on the lower inner wall of the connector, and a positioning block 8 is provided on the outer side of the inner tube 2. The positioning block 8 is adapted to the positioning groove 9. The positioning block is fixed on the inner tube 2 and is located at the lower part of the external thread section 4. Through the cooperation of the positioning block and the positioning groove, the connector can always move vertically, thereby providing a downward squeezing force for the sealing sleeve 5, avoiding the rotational force of the squeezing nut 7 from acting on the sealing sleeve 5, preventing the sealing sleeve 5 from rotating, and reducing the wear of the sealing sleeve 5.

[0040] In the specific structure, the lower part of the compression ring 6 can be fixedly connected to the upper part of the sealing sleeve 5, and a sleeve body 64 is provided at the lower part of the pressure ring 63. The sleeve body is fitted outside the inner tube and fixedly connected to the upper part of the sealing sleeve 5.

[0041] The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. The basic concept of this utility model is to utilize a deformable sealing sleeve structure and a threaded force-applying structure to apply extrusion pressure to the sealing sleeve from the outside, forcing the sealing sleeve to deform. The radial deformation (outward protrusion deformation) of the sealing sleeve fills the gap between the inner and outer tubes, forming a dual sealing effect of contact sealing and pressure sealing, which can withstand higher grouting pressure. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A convenient connection device for soil nailing grouting pipes, characterized in that: The device includes an inner tube, an outer tube, and a connecting device. The inner tube is sealed and connected to the outer tube via the connecting device. The connecting device includes a compression nut, a compression ring, a limiting platform, and a sealing sleeve. The bottom of the inner tube has an outwardly protruding limiting platform. The sealing sleeve is a deformable structure, fitted onto the inner tube and resting on the limiting platform. The compression ring is slidably fitted onto the outside of the inner tube and resting on the upper part of the sealing sleeve. An external thread section is provided at the upper part of the inner tube. The compression nut is threaded onto the external thread section and located above the compression ring to apply a force to the compression ring from above, thereby deforming the sealing sleeve.

2. The convenient connection device for soil nailing grouting pipes according to claim 1, characterized in that: The sealing sleeve is a rubber sleeve, and multiple sets of clamps are provided inside the sealing sleeve, with the sealing sleeve between the clamps forming a deformation zone.

3. The convenient connection device for soil nailing grouting pipes according to claim 1 or 2, characterized in that: The inner wall of the outer tube is provided with a sealing groove to accommodate the deformation of the sealing sleeve.

4. The convenient connection device for soil nailing grouting pipes according to claim 1, characterized in that: The extrusion ring includes a connecting body, an upper pressure ring, and a lower pressure ring. The upper and lower parts of the connecting body are fixed with the upper pressure ring and the lower pressure ring, wherein the upper pressure ring corresponds to the lower part of the extrusion nut, and the lower pressure ring corresponds to the upper part of the sealing sleeve.

5. The convenient connection device for soil nailing grouting pipes according to claim 4, characterized in that: A positioning groove is provided on the lower inner wall of the connector, and a positioning block is provided on the outer side of the inner tube, with the positioning block matching the positioning groove.

6. The convenient connection device for soil nailing grouting pipes according to claim 5, characterized in that: The lower part of the compression ring is fixedly connected to the upper part of the sealing sleeve.

7. The convenient connection device for soil nailing grouting pipes according to claim 1, characterized in that: An operating handle is provided on the outside of the compression nut.

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