CN-224227799-U - A convenient connecting device for soil nail slip casting pipe

CN224227799UCN 224227799 UCN224227799 UCN 224227799UCN-224227799-U

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, wherein the inner pipe is connected in the outer pipe in a sealing way through the connecting device, the connecting device comprises an extrusion nut, an extrusion ring, a limiting table and a sealing sleeve, the bottom of the inner pipe is provided with the limiting table protruding outwards, the sealing sleeve is of a deformable structure, is sleeved on the inner pipe and is located on the limiting table, the extrusion ring is sleeved outside the inner pipe in a sliding way and is located on the upper part of the sealing sleeve, the upper part of the inner pipe is provided with an external thread section, and the extrusion nut is connected on the external thread section in a threaded way and is located on the upper part of the extrusion ring so as to apply acting force on the extrusion ring from the upper part to deform the sealing sleeve. The utility model has simple operation, easy connection and disassembly, ensures the loading pressure of the grouting pipe, and ensures the safety of construction operators, and meanwhile, the connection is reliable and is not easy to loose.

Inventors

HAN DONG
Ren Yuanqi
CHENG JIANPENG
Jia Zhexi
GUO ZILONG
YANG DI

Assignees

中国建筑第五工程局有限公司

Dates

Publication Date: 20260512
Application Date: 20250411

Claims (7)

1. A convenient connecting device for a soil nail grouting pipe is characterized by comprising an inner pipe, an outer pipe and a connecting device, wherein the inner pipe is connected in the outer pipe in a sealing mode through the connecting device, the connecting device comprises an extrusion nut, an extrusion ring, a limiting table and a sealing sleeve, the limiting table protruding outwards is arranged at the bottom of the inner pipe, the sealing sleeve is of a deformable structure and sleeved on the inner pipe and is located on the limiting table, the extrusion ring is sleeved outside the inner pipe in a sliding mode and 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 to apply acting force on the extrusion ring from the upper portion so that the sealing sleeve is deformed.
2. The portable connecting device for the soil nail grouting pipe of claim 1, wherein the sealing sleeve is a rubber sleeve, a plurality of groups of hoops are arranged in the sealing sleeve, and the sealing sleeve between the hoops is a deformation area.
3. The portable connection device for a soil nail grouting pipe according to claim 1 or 2, wherein the inner wall of the outer pipe is provided with a sealing groove for accommodating deformation of the sealing sleeve.
4. The portable connection device for a soil nail grouting pipe of claim 1, wherein the extrusion ring comprises a connection body, an upper compression ring and a lower compression ring, the upper compression ring and the lower compression ring are fixed on the upper portion and the lower portion of the connection body, the upper compression ring corresponds to the lower portion of the extrusion nut, and the lower compression ring corresponds to the upper portion of the sealing sleeve.
5. The portable connection device for a soil nail grouting pipe of claim 4, wherein the lower inner wall of the connection body is provided with a positioning groove, the outer side of the inner pipe is provided with a positioning block, and the positioning block is matched with the positioning groove.
6. The portable connecting device for soil nail grouting pipe of claim 5 wherein the lower part of the extruding ring is fixedly connected to the upper part of the sealing sleeve.
7. The portable connecting device for soil nail grouting pipe of claim 1, wherein the outer side of the extrusion nut is provided with an operation handle.

Description

A convenient connecting device for soil nail slip casting pipe Technical Field The utility model relates to the technical field, in particular to a convenient connecting device for a soil nail grouting pipe. Background Soil nail grouting is a key procedure of soil nail support, and soil body and a reinforcing structure are integrated by drilling, embedding reinforcing steel bars (or steel pipes) and grouting cement slurry, so that the stability of a side slope or a foundation pit is improved. The technology is widely applied to the fields of foundation pit support, slope reinforcement, tunnel engineering and the like, and has the advantages of being rapid in construction, low in cost, high in adaptability and the like. At present, a grouting pipe connection mode commonly used in soil nail grouting construction is to sleeve a grouting joint at the outer side of a pipe body and fix the grouting joint by using a clamp, an iron wire or a screw. However, when the grouting pipe is used, the connecting strength of the grouting pipe is mostly dependent on the combination of the adapting sleeve and the sealing sleeve to realize sealing, the sealing effect is poor, leakage or spraying is easy to occur during grouting, material waste and environmental pollution are caused, and when the grouting pipe is used for high-pressure grouting, if the connection is not firm, the joint is likely to collapse, and high-speed splashing slurry or metal parts can hurt operators. After multiple disassembly and assembly, the clamp is easy to deform, so that the sealing performance is reduced, and frequent replacement is required. Based on this, it is necessary to study a convenient connection device for a soil nail grouting pipe. Disclosure of utility model In view of the above, the utility model aims to provide a convenient connecting device for a soil nail grouting pipe, which effectively solves the problem of poor connection tightness of the existing grouting pipe connecting structure. The convenient connection device for the soil nail grouting pipe comprises an inner pipe, an outer pipe and a connection device, wherein the inner pipe is connected in the outer pipe in a sealing mode through the connection device, the connection device comprises an extrusion nut, an extrusion ring, a limiting table and a sealing sleeve, the bottom of the inner pipe is provided with the limiting table protruding outwards, the sealing sleeve is of a deformable structure, the sealing sleeve is sleeved on the inner pipe and is located on the limiting table, the extrusion ring is sleeved outside the inner pipe in a sliding mode and is located on the upper portion of the sealing sleeve, an external thread section is arranged on the upper portion of the inner pipe, the extrusion nut is connected to the external thread section in a threaded mode and is located on the upper portion of the extrusion ring, and therefore acting force is applied to the extrusion ring from the upper portion, and the sealing sleeve is deformed. Furthermore, the sealing sleeve is a rubber sleeve, a plurality of groups of hoops are arranged in the sealing sleeve, and the sealing sleeve between the hoops is a deformation area. Further, the inner wall of the outer tube is provided with a sealing groove for accommodating deformation of the sealing sleeve. Further, the extrusion ring comprises a connecting body, an upper compression ring and a lower compression ring, wherein the upper compression ring and the lower compression ring are fixed on the upper part and the lower part of the connecting body, the upper compression ring corresponds to the lower part of the extrusion nut, and the lower compression ring corresponds to the upper part of the sealing sleeve. Further, a positioning groove is formed in the inner wall of the lower portion of the connecting body, a positioning block is arranged on the outer side of the inner tube, and the positioning block is matched with the positioning groove. Further, the lower part of the extrusion ring is fixedly connected to the upper part of the sealing sleeve. Further, an operating handle is arranged on the outer side of the extrusion nut. The technical scheme has the beneficial effects that the deformable sealing sleeve structure is provided, the gap between the inner pipe and the outer pipe is filled through radial deformation of the sealing sleeve, meanwhile, positive pressure is generated between the sealing sleeve and the inner wall of the outer pipe, double sealing (contact sealing and pressure sealing) is realized, and higher grouting pressure can be borne. In order to provide extrusion force, the extrusion ring is used for uniformly transmitting force to the sealing sleeve by utilizing the screw transmission of the extrusion nut to provide continuous and stable axial pressure, so that the loosening problem caused by deformation of the traditional clamp is avoided, the sealing sleeve can be tightly attached to the inner wall of the outer tu