Freezing pipe anti-fracture device

Abstract

The utility model discloses an anti-fracture device for a freezing pipe, belongs to the technical field of stratum freezing engineering, and solves the problem of frozen saline leakage caused by cracking of the existing freezing pipe in the construction process. The device comprises a freezing pipeline formed by threaded connection of a plurality of sections of freezing pipes, a protective cylinder is fixed on the outer wall of the freezing pipeline, and the outer wall of the protective cylinder is provided with threads used for being screwed into a stratum; a PVC backflow pipe used for backflow of frozen saline water is arranged in the freezing pipeline, and the space between the outer wall of the PVC backflow pipe and the inner wall of the freezing pipeline is filled with a lining. The protection barrel with the spiral threads is arranged outside the freezing pipe, so that the freezing pipe can be protected, and salt water leakage caused by cracking of joints of the freezing pipe is prevented. And the protective cylinder can be screwed into the stratum more easily through the spiral threads on the outer wall when the protective cylinder is blocked.

Description

Technical Field

[0001] This utility model relates to the field of ground freezing engineering technology, specifically to a device for preventing the breakage of freezing pipes. Background Technology

[0002] Freezing is a mature construction technique. A common method involves driving freezing pipes around the soil to be reinforced, filling the pipes with a medium such as brine, and circulating it through a refrigeration unit to cool the soil. Currently, the freezing pipes are made of stainless steel, with threaded connections between different sections and welding on the outer ring. However, due to high frictional resistance during construction, the welded joints are prone to cracking after the freezing pipes are driven into the ground, causing the frozen brine to leak out.

[0003] The existing method for dealing with cracked and leaking freezing pipes involves inserting a steel pipe with a smaller diameter inside the freezing pipe. After this treatment, the effective freezing pipe diameter is reduced, the flow velocity of the freezing brine decreases, and laminar flow occurs when the flow velocity is below the Reynolds number, affecting the freezing efficiency.

[0004] To address the aforementioned issues, Chinese Patent CN107091391B discloses an automatic leak-sealing device for a frozen pipe joint that has fractured. This device includes a sleeve and a chemical agent. The sleeve is fitted onto the frozen pipe joint, and its two ends are tightly sealed to the frozen pipe via a fastening and 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 within this annular cavity. When the frozen pipe cracks, the chemical agent reacts with brine and solidifies, quickly filling the gap and preventing leakage. However, this automatic leak-sealing device uses a clamp to fix the frozen pipe. Since the clamp lacks a protective device, it may fall off due to soil friction during the freezing pipe's penetration into the ground. After falling off, the device lacks a fixing device, and the internal chemical agent may leak. Furthermore, the device itself may deform and crack during use due to soil compression, causing it to malfunction. Utility Model Content

[0005] To address the aforementioned problems in the prior art, this utility model provides a device to prevent the freezing pipe from breaking, which solves the problem of leakage of freezing brine caused by cracking of existing freezing pipes during construction.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A device for preventing the breakage of a freezing pipe is provided, comprising a freezing pipe connected by multiple sections of frozen pipe threaded together, a protective cylinder fixed on the outer wall of the freezing pipe, and a spiral groove for screwing into the formation on the outer wall of the protective cylinder; a PVC return pipe for the return of frozen brine is provided inside the freezing pipe, and an inner lining is filled between the outer wall of the PVC return pipe and the inner wall of the freezing pipe.

[0008] The working principle of this solution is as follows: During the use phase, the freezing pipe is connected to form a freezing pipeline through threaded connections. After the connection is completed, the freezing pipeline and the PVC return pipe are sealed together by an inner liner. The protective sleeve is placed on the outside of the freezing pipeline. The spiral pattern on the outer wall of the protective sleeve makes it easier to screw into the formation when encountering resistance. The protective sleeve can also prevent the freezing pipe from falling off during drilling. During freezing, the protective sleeve can protect the freezing pipe and prevent the freezing pipe joints from cracking, which would lead to brine leakage.

[0009] Furthermore, the protective cylinder comprises multiple cylinders fixed to the freezing pipe. The split-type cylinder design allows for flexible adjustment of the protection range according to the length of the freezing pipe, reducing the processing difficulty and cost of the protective cylinder.

[0010] Furthermore, each cylinder is fixed to the freezing pipe via a fixing structure. This fixing structure ensures a reliable connection between the protective cylinder and the freezing pipe, preventing displacement or detachment of the protective cylinder during construction and ensuring the stability of the protective effect.

[0011] Furthermore, the fixing structure can be a clamp, rubber strip, or pipe clamp. Common fixing methods such as clamps, rubber strips, or pipe clamps simplify the installation process, reduce construction complexity, and provide sufficient tightening force.

[0012] Furthermore, the spiral pattern is a sawtooth thread. The sharp edges of the sawtooth thread can effectively cut into hard layers, reducing the resistance to spiraling.

[0013] Furthermore, the thread angle of the helical thread is 30° to 60°. The thread angle range of 30° to 60° optimizes the balance between screwing efficiency and structural strength: too small an angle will easily lead to insufficient thread strength, while too large an angle will increase screwing resistance. This range takes into account both construction efficiency and protective reliability.

[0014] Furthermore, the spiral thread is a trapezoidal thread. The symmetrical structure of the trapezoidal thread enhances the thread's load-bearing capacity, making it suitable for high-stress geological environments. It is also less prone to deformation during long-term use, extending the life of the protective casing.

[0015] Furthermore, the lining material is EPDM rubber. EPDM rubber lining has excellent low-temperature resistance and salt water corrosion resistance, preventing seal failure due to material aging. At the same time, its elastic modulus can buffer pipeline vibration stress, further reducing the risk of cracking.

[0016] This utility model discloses a device for preventing the breakage of freezing pipes, which has the following advantages:

[0017] This invention protects the freezing pipe by installing a spiral-patterned protective sleeve on its exterior, preventing cracking of the pipe joints and subsequent brine leakage. Furthermore, the spiral pattern on the outer wall of the protective sleeve makes it easier to spiral into the formation when encountering obstacles. Attached Figure Description

[0018] Figure 1 This is a cross-sectional schematic diagram of the anti-breakage device for freezing pipes;

[0019] Figure 2 This is a top view of the anti-breakage device for freezing pipes;

[0020] The components include: 1. Freezing pipe; 2. Protective cylinder; 21. Fixing structure; 3. PVC return pipe; 4. Lining. Detailed Implementation

[0021] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0022] This embodiment provides a device to prevent the freezing pipe from breaking, which is used to solve the problem of existing freezing pipes cracking during construction and causing leakage of frozen brine. The following is a detailed demonstration of the device.

[0023] refer to Figure 1 and Figure 2 A device for preventing the breakage of a freezing pipe includes a freezing pipe 1, which is formed by connecting multiple sections of freezing pipes by threads. A protective cylinder 2 is fixed on the outer wall of the freezing pipe 1, and the outer wall of the protective cylinder 2 is provided with spiral patterns for screwing into the stratum.

[0024] The protective cylinder 2 comprises multiple cylinders fixed to the freezing pipe 1. The split-type cylinder design allows for flexible adjustment of the protection range according to the length of the freezing pipe 1, reducing the processing difficulty and cost of the protective cylinder 2. Each cylinder is fixed to the freezing pipe 1 via a fixing structure 21. The fixing structure 21 ensures a reliable connection between the protective cylinder 2 and the freezing pipe 1, preventing displacement or detachment of the protective cylinder 2 during construction and ensuring the stability of the protective effect.

[0025] In this embodiment, the fixing structure 21 can be a clamp, rubber strip, or pipe clamp. Common fixing methods such as clamps, rubber strips, or pipe clamps simplify the installation process, reduce construction complexity, and provide sufficient fastening force.

[0026] Preferably, in order to improve the sealing performance of the freezing pipe, the joints between the multiple cylinders on the protective cylinder 2 are staggered from the joints on the freezing pipe 1.

[0027] The freezing pipe 1 is internally equipped with a PVC return pipe 3, which is used for the return of frozen brine. A liner 4 is filled between the outer wall of the PVC return pipe 3 and the inner wall of the freezing pipe 1. The liner 4 is made of EPDM rubber. EPDM rubber liner 4 has excellent low-temperature resistance and salt water corrosion resistance, preventing seal failure due to material aging. Its elastic modulus can also buffer pipe vibration stress, further reducing the risk of cracking.

[0028] As one embodiment, the spiral thread is a sawtooth thread with a thread angle of 30° to 60°. The sharp edges of the sawtooth thread can effectively cut into hard layers and reduce the resistance to spiraling.

[0029] As another option in this embodiment, the spiral thread is a trapezoidal thread. The symmetrical structure of the trapezoidal thread improves the thread's load-bearing capacity, is suitable for high-stress geological environments, is not easily deformed during long-term use, and extends the life of the protective cylinder 2.

[0030] In summary, the working principle of this solution is as follows:

[0031] During use, the freezing pipe is connected to the freezing pipe 1 by threaded connection. After the connection is completed, the freezing pipe 1 and the PVC return pipe 3 are sealed together by the inner liner 4. The protective sleeve 2 is put on the outside of the freezing pipe 1. The protective sleeve 2 can be more easily screwed into the formation when encountering resistance due to the spiral pattern on the outer wall. The protective sleeve 2 can also prevent the freezing pipe from falling off during drilling.

[0032] During freezing, the protective sleeve 2 protects the freezing pipe and prevents the freezing pipe joints from cracking and causing brine leakage.

[0033] Although the specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. A device for preventing the breakage of freezing pipes, characterized in that, It includes a freezing pipe (1) connected by multiple sections of frozen pipe threads, and a protective cylinder (2) is fixed on the outer wall of the freezing pipe (1). The outer wall of the protective cylinder (2) is provided with spiral patterns for screwing into the stratum. The inside of the freezing pipe (1) is provided with a PVC return pipe (3) for the return of frozen brine, and the outer wall of the PVC return pipe (3) and the inner wall of the freezing pipe (1) are filled with a liner (4).

2. The anti-breakage device for freezing pipes according to claim 1, characterized in that, The protective cylinder (2) includes multiple cylinders fixed to the freezing pipe (1).

3. The anti-breakage device for freezing pipes according to claim 2, characterized in that, Each of the cylinders is fixed to the freezing pipe (1) by a fixing structure (21).

4. The anti-breakage device for freezing pipes according to claim 3, characterized in that, The fixing structure (21) is a clamp, rubber strip or pipe clamp.

5. The anti-breakage device for freezing pipes according to claim 1, characterized in that, The spiral pattern is a sawtooth thread.

6. The anti-breakage device for freezing pipes according to claim 5, characterized in that, The thread angle of the spiral pattern is 30° to 60°.

7. The anti-breakage device for freezing pipes according to claim 1, characterized in that, The spiral pattern is a trapezoidal thread.

8. The anti-breakage device for freezing pipes according to claim 1, characterized in that, The inner lining (4) is made of EPDM rubber.

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