CN-224229557-U - Freezing pipe fracture prevention device

Abstract

The utility model discloses a freezing pipe fracture prevention device, belongs to the technical field of stratum freezing engineering, and solves the problem of freezing brine leakage caused by cracking of an existing freezing pipe in the construction process; the freezing pipeline comprises a plurality of freezing pipes in threaded connection, a protective cylinder is fixed on the outer wall of the freezing pipeline, spiral lines for screwing into a stratum are arranged on the outer wall of the protective cylinder, a PVC return pipe for returning frozen brine is arranged in the freezing pipeline, and a lining is filled between the outer wall of the PVC return pipe and the inner wall of the freezing pipeline. According to the utility model, the protection cylinder with spiral lines is arranged outside the freezing pipeline, so that the freezing pipe can be protected, and the seam of the freezing pipe is prevented from cracking, so that the brine leakage is prevented. And the protective cylinder is easier to screw into the stratum when encountering blocking through the spiral lines on the outer wall.

Inventors

• GAO QINGXU
• HUANG HOU
• CHEN GANG
• WANG WENXU
• YANG FANGSHENG
• WU GUIBIN
• Rong Jianpeng

Assignees

• 中建一局集团华南建设有限公司
• 中国建筑一局(集团)有限公司

Dates

Publication Date

20260512

Application Date

20250521

Claims (8)

1. 1. The freezing pipe fracture prevention device is characterized by comprising a freezing pipe (1) which is connected through a plurality of freezing pipes in a threaded mode, wherein a protective cylinder (2) is fixed on the outer wall of the freezing pipe (1), and spiral threads for screwing into a stratum are arranged on the outer wall of the protective cylinder (2); The inside of freezing pipeline (1) is provided with PVC back flow (3) that are used for freezing brine backward flow, be filled with inside lining (4) between the outer wall of PVC back flow (3) and the inner wall of freezing pipeline (1).
2. 2. A freeze pipe fracture prevention device according to claim 1, characterized in that the protective cylinder (2) comprises a plurality of cylinders fixed to the freeze pipe (1).
3. 3. A freeze pipe fracture prevention device according to claim 2, characterized in that each of the cylinders is fixed to the freeze pipe (1) by a fixing structure (21).
4. 4. A freeze pipe fracture prevention device according to claim 3, characterized in that the fixing structure (21) is a clip, a strip or a pipe clamp.
5. 5. The freezing pipe fracture prevention device as claimed in claim 1, wherein the screw thread is a serration thread.
6. 6. The freezing pipe fracture prevention device according to claim 5, wherein the screw thread angle of the screw thread is 30 ° to 60 °.
7. 7. The freezing pipe fracture prevention device as claimed in claim 1, wherein the screw thread is a trapezoidal screw thread.
8. 8. The freezing pipe fracture prevention device according to claim 1, wherein the lining (4) is made of ethylene propylene diene monomer rubber.

Description

Freezing pipe fracture prevention device Technical Field The utility model relates to the technical field of stratum freezing engineering, in particular to a freezing pipe fracture prevention device. Background The freezing method is used as a mature construction process, and the common construction method is to lay a freezing pipe around the soil body to be reinforced, fill saline water and other mediums into the freezing pipe, and realize soil body cooling through circulation of a refrigerating unit. At present, the freezing pipe adopts stainless steel pipes, different pipe joints are connected by screw threads, and the outer ring is welded. In the construction process, the friction resistance is large, and the welded part is easy to crack after the freezing pipe is driven into the stratum, so that the frozen brine is lost. The existing measures for treating the cracking and leakage of the freezing pipe are that a steel pipe with smaller pipe diameter is put into the freezing pipe. After such treatment, the effective freezing pipe diameter is reduced, the flow rate of frozen brine is reduced, and laminar flow can appear when the flow rate is lower than the Reynolds number, so that the freezing efficiency is affected. In order to solve the above problems, chinese patent publication No. CN107091391B discloses an automatic plugging device for breaking a frozen pipe joint, which comprises a sleeve and a chemical agent, wherein the sleeve is sleeved at the frozen pipe joint, two ends of the sleeve and the frozen pipe are tightly sealed by a fastening sealing assembly, a closed annular cavity is formed between the inner wall of the sleeve and the outer surface of the frozen pipe joint, and the chemical agent is stored in the annular cavity. When the freezing pipe cracks, the chemical agent reacts with the salt water to solidify, so that gaps can be filled rapidly, and leakage is avoided. But this automatic plugging device that splits adopts the cuff to fix with the freezing pipe, because the cuff does not have protection device, the cuff probably takes place to drop because of soil body friction in-process is beaten into the stratum to the freezing pipe, and the device just does not have fixing device after dropping, and inside chemical agent can leak, and the device itself probably takes place deformation and fracture because of soil body extrusion in the use, causes the device to become invalid. Disclosure of utility model Aiming at the problems in the prior art, the utility model provides a freezing pipe fracture prevention device, which solves the problem of freezing brine leakage caused by cracking of the existing freezing pipe in the construction process. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: The freezing pipe fracture preventing device comprises a freezing pipe connected through a plurality of freezing pipes in a threaded mode, a protective cylinder is fixed on the outer wall of the freezing pipe, spiral lines for screwing into a stratum are arranged on the outer wall of the protective cylinder, a PVC return pipe for returning frozen brine is arranged in the freezing pipe, and a lining is filled between the outer wall of the PVC return pipe and the inner wall of the freezing pipe. The theory of operation of this scheme is, at the stage of using, freezing the pipe and connecting into freezing the pipeline through the screw thread, will freeze through the inside lining after the connection is accomplished and wholly seal between pipeline and the PVC back flow, establish the protection section of thick bamboo cover in freezing the pipeline outside, the protection section of thick bamboo is more easy precession stratum when meetting the retardation through the spiral line on the outer wall, and the protection section of thick bamboo can prevent to freeze the pipe and drop at the drilling process, during freezing, the protection section of thick bamboo can protect the freezing pipe, prevents to freeze pipe seam fracture, leads to the salt water seepage. Further, the protective cylinder comprises a plurality of cylinders fixed on the freezing pipeline. The design of the split type cylinder body can flexibly adjust the protection range according to the length of the frozen pipeline, and the processing difficulty and cost of the protection cylinder are reduced. Further, each cylinder is fixed to the freezing pipe by a fixing structure. Reliable connection of the protection cylinder and the freezing pipeline is realized through the fixing structure, the protection cylinder is prevented from shifting or falling off in the construction process, and the stability of the protection effect is ensured. Further, the fixed structure is a clamp, an adhesive tape or a pipe clamp. Common fixing modes such as clamp, adhesive tape or pipe clamp simplify the installation process, reduce the construction complexity, and simultaneously provide enough fastening for