Corrosion protected welded pipe end protection structure
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING JULONG STEEL PIPE
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional welded pipe end protection structures have poor sealing performance and cannot effectively buffer impact forces, resulting in easy damage to the anti-corrosion lining layer and failure of anti-corrosion effect.
The welded pipe end protection structure with anti-corrosion lining is adopted. Rubber clamps of different diameters are used to fit tightly with the inner and outer walls of the welded pipe. Combined with the buffer assembly of sliding sleeve, sliding plate and spring, it provides sealing and buffering effect, and enhances connection stability and shock resistance.
This ensures that the ends of the welded pipe are not damaged during transportation, improves sealing and cushioning effects, protects the anti-corrosion lining layer, and enhances the stability and anti-corrosion performance of the welded pipe.
Smart Images
Figure CN224497967U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of welded pipes, and in particular to a welded pipe end protection structure with anti-corrosion lining. Background Technology
[0002] In industries such as petroleum, chemical, and natural gas, welded pipes are key equipment for transporting fluid media. Their corrosion resistance directly affects the safety and service life of the pipeline system. To extend the service life of welded pipes, anti-corrosion linings (such as epoxy resin, polyethylene, and fiberglass) are usually installed on their inner walls to physically isolate or chemically inert the corrosive media from contacting the pipe material.
[0003] However, during the transportation of welded pipes, the ends are easily damaged due to collisions, especially the anti-corrosion lining, which may be scratched or detached during transportation, resulting in the failure of the anti-corrosion effect. Traditional welded pipe end protection structures mostly use simple caps or metal protective sleeves. Although these structures can provide some protection, they often have problems such as poor sealing and inability to effectively buffer impact forces, which cannot meet the protection requirements of high-quality welded pipes during transportation and storage. Therefore, a welded pipe end protection structure with an anti-corrosion lining is proposed to solve the above problems. Utility Model Content
[0004] To overcome the above deficiencies, this utility model provides a welded pipe end protection structure with anti-corrosion lining, which aims to solve the problem in the prior art that "traditional caps or metal protective sleeves have poor sealing performance and cannot effectively buffer impact forces, resulting in the anti-corrosion lining layer being easily scratched or falling off, and the anti-corrosion effect failing."
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a welded pipe end protection structure with anti-corrosion lining, comprising a welded pipe, a protective component provided on the right side of the welded pipe, the protective component comprising a protective sleeve, a first annular groove provided on the left side of the protective sleeve, and a second annular groove provided on the right side of the first annular groove inside the protective sleeve, the diameter of the first annular groove being larger than the diameter of the second annular groove, two sets of clamping members being movably engaged on the inner wall of the first annular groove, the two sets of clamping members having different diameters, one set of clamping members having a smaller diameter than the other set of clamping members, the clamping member with the smaller diameter being engaged on the inner side of the inner wall of the first annular groove, and the outer wall of the clamping member being adapted to the inner wall of the welded pipe end, the clamping member with the larger diameter being engaged on the outer side of the inner wall of the first annular groove, and the inner wall of the clamping member being adapted to the outer wall of the welded pipe end, a buffer component provided on the right side of the protective sleeve for providing buffering for the protective sleeve and the welded pipe.
[0006] As a further description of the above technical solution:
[0007] Both sets of clamping components are circular rubber rings, and the left side of the opposite face of the two sets of clamping components is set as an inclined surface.
[0008] As a further description of the above technical solution:
[0009] The rubber ring is made of rubber, and the inner wall of the protective sleeve is inclined on the left side near the second annular groove.
[0010] As a further description of the above technical solution:
[0011] The buffer assembly includes a sliding sleeve that slides on the outer wall of the protective sleeve. A sliding disc is fixedly connected to the left inner wall of the sliding sleeve, and a sliding disc is fixedly connected to the left side of the sliding disc. A slot is provided on the right side of the protective sleeve, and a sliding groove is provided on the inner wall of the slot near the right side. The sliding disc is slidably connected to the inner wall of the sliding groove.
[0012] As a further description of the above technical solution:
[0013] The left side of the second slide plate is elastically connected to the protective sleeve by a spring, which is located inside the empty groove.
[0014] As a further description of the above technical solution:
[0015] A buffer pad is fixedly connected to the right side of the sliding sleeve.
[0016] As a further description of the above technical solution:
[0017] Through holes are provided at the center of each of the slide plate 2, slide plate 1, slide sleeve and buffer pad.
[0018] As a further description of the above technical solution:
[0019] The diameter of the second slide is larger than that of the first slide, and multiple sets of through holes are connected together.
[0020] This utility model has the following beneficial effects:
[0021] 1. In this utility model, two sets of rubber clamps with different diameters are tightly fitted to the inner and outer walls of the welded pipe. The elastic deformation of the rubber creates a sealing effect and protects the end of the welded pipe. When subjected to the thrust of transportation bumps, the end of the welded pipe is pressed against the left inclined surface of the second annular groove, causing the welded pipe to be stuck into the inner wall of the second annular groove and squeezed, making the welded pipe stuck into the second annular groove tighter and tighter, thereby enhancing the connection stability and ensuring that the end of the welded pipe and the anti-corrosion lining layer are not damaged during transportation, thus ensuring the stability and safety of the welded pipe during transportation.
[0022] 2. In this utility model, the interaction of the sliding sleeve, sliding plate, and spring provides an effective buffering effect. When the end of the welded pipe is impacted, the buffer pad will be compressed first, which will then drive the sliding sleeve and sliding plate one to slide. The sliding plate two slides in the groove and compresses the spring, squeezing the air out through the through hole, producing a damping effect. This effectively reduces the impact force that may occur during transportation, avoids direct damage to the end of the welded pipe and the anti-corrosion lining layer, improves the protection effect, enhances the shock resistance and collision resistance of the welded pipe during transportation, and ensures the integrity and anti-corrosion performance of the pipe. Attached Figure Description
[0023] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model;
[0024] Figure 2 This is a schematic diagram showing the three-dimensional structure of the welded pipe and the protective sleeve, as well as the cross-sectional view of the three-dimensional mechanism of the protective sleeve in this utility model.
[0025] Figure 3 This is a three-dimensional cross-sectional view of the protective sleeve, sliding sleeve, and buffer pad in this utility model.
[0026] Legend:
[0027] 1. Welded pipe; 2. Buffer assembly; 3. Protective assembly; 21. Sliding sleeve; 22. Buffer pad; 23. Through hole; 24. Sliding plate one; 25. Sliding plate two; 26. Sliding groove; 27. Spring; 28. Empty groove; 31. Protective sleeve; 32. Circular groove one; 33. Clamping part; 34. Circular groove two. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] Reference Figure 1 - Figure 3This utility model provides an embodiment of a welded pipe end protection structure with an anti-corrosion lining, comprising a welded pipe 1, the inner wall of which is covered with an anti-corrosion lining layer, a protection component 3 on the right side of the welded pipe 1, the protection component 3 including a protective sleeve 31, the protective sleeve 31 being cylindrical in shape, with two sets of clamping members 33 fitted to the diameter of the welded pipe 1 and tightly fitting against the outer wall of the end of the welded pipe 1 to ensure connection stability, a first annular groove 32 is provided on the left side of the protective sleeve 31, and a second annular groove 34 is provided inside the protective sleeve 31 on the right side of the first annular groove 32, the connection between the second annular groove 34 and the protective sleeve 31 being made of rubber, the diameter of the first annular groove 32 being larger than the diameter of the second annular groove 34, and two sets of clamping members 33 being movably engaged on the inner wall of the first annular groove 32. The clamping parts 33 have different diameters. One set of clamping parts 33 has a smaller diameter than the other set. The clamping part 33 with the smaller diameter is engaged with the inner wall of the annular groove 32, and its outer wall is adapted to the inner wall of the end of the welded pipe 1. This increases the tightness between the welded pipe 1 and the clamping part 33. The clamping part 33 with the larger diameter is engaged with the outer wall of the annular groove 32, and its inner wall is adapted to the outer wall of the end of the welded pipe 1. The inner wall of the clamping part 33 with the larger diameter is adapted to the outer wall of the end of the welded pipe 1. After installation, the two sets of clamping parts 33, together with the protective sleeve 31, are fitted to the inner and outer walls of the welded pipe 1 to seal it and prevent external moisture and dust from entering.
[0030] Furthermore, a buffer assembly 2 is provided on the right side of the protective sleeve 31 to reduce the impact force of collisions during transportation, improve the overall quality of the welded pipe 1, and provide buffering for the protective sleeve 31 and the welded pipe 1. Both sets of clamping parts 33 are circular rubber rings, which are installed on the inner wall of the circular groove 32. The left side of the opposite face of the two sets of clamping parts 33 is set as an inclined surface. The rubber rings are made of rubber material, which can increase the friction force installed on the outer wall of the welded pipe 1, thereby increasing stability and sealing. The left side of the inner wall of the protective sleeve 31 near the circular groove 34 is set as an inclined surface. When the protective sleeve 31 is pushed to the left, the welded pipe 1 squeezes the left inclined surface of the circular groove 34 and further slides to the inner wall of the circular groove 34, thereby squeezing the rubber at the connection between the circular groove 34 and the protective sleeve 31, thereby reducing the gap with the welded pipe 1 and achieving a "tighter and tighter" sealing effect.
[0031] Reference Figure 1 - Figure 3The buffer assembly 2 includes a sliding sleeve 21 that supports a buffer pad 22. The sliding sleeve 21 slides on the outer wall of the protective sleeve 31. A sliding disc 24 is fixedly connected to the inner left side of the sliding sleeve 21, supporting the sliding sleeve 21. A sliding disc 25 is fixedly connected to the left side of the sliding disc 24, supporting the sliding disc 24 and limiting its sliding distance. A slot 28 is provided on the right side of the protective sleeve 31, providing space for a spring 27. A groove 26 is provided on the inner wall of the groove 28 near the right side, engaging with the sliding disc 25 to limit its sliding distance. The sliding disc 25 is slidably connected to the inner wall of the groove 26. The left side of the sliding disc 25 is elastically connected to the protective sleeve 31 by a spring 27. When the buffer pad 22 is compressed, it moves inward, causing the sliding sleeve 21 and the first sliding plate 24 to move and compress the spring 27. At the same time, the movement of the second sliding plate 25 compresses the air inside the empty groove 28 and discharges it through the through hole 23, thereby producing a damping and buffering effect. The spring 27 is set inside the empty groove 28. The buffer pad 22 is fixedly connected to the right side of the sliding sleeve 21. The buffer pad 22 can provide a collision buffering effect. The center of the second sliding plate 25, the first sliding plate 24, the sliding sleeve 21 and the buffer pad 22 are all provided with through holes 23. Air is discharged from multiple sets of through holes 23, thereby producing a damping effect. The spring 27 further improves the buffering effect. The diameter of the second sliding plate 25 is larger than the diameter of the first sliding plate 24. Multiple sets of through holes 23 are connected.
[0032] Working principle: During use, in the transportation stage, the protective component 3 is connected to the end of the welded pipe 1. The protective sleeve 31 achieves precise positioning through the annular shape on the outer wall of the end, allowing the welded pipe 1 to be inserted between two sets of rubber clamping parts 33 of different diameters in the left annular groove 32 of the protective sleeve 31. The inner wall of the smaller diameter clamping part 33 fits against the inner lining layer of the welded pipe 1, while the outer wall of the larger diameter clamping part 33 adapts to the outer wall of the end of the welded pipe 1, protecting the welded pipe 1. When the protective sleeve 31 is pushed to the left, the end of the welded pipe 1 presses against the left inclined surface of the second annular groove 34, causing the welded pipe 1 to be stuck into the inner wall of the second annular groove 34, and pressing against the connection between the second annular groove 34 and the protective sleeve 31, thus advancing the welded pipe 1 into the annular groove 34. The "tighter the pressure" sealing structure, combined with the friction of the rubber material of the two sets of clamping parts 33, effectively prevents external moisture and dust from entering. When a collision occurs during transportation, the buffer pad 22 of the buffer assembly 2 is compressed first, causing the sliding sleeve 21 and the sliding plate 24 to slide. The sliding plate 25 moves simultaneously in the sliding groove 26 of the empty groove 28 and compresses the spring 27, while squeezing the air in the empty groove 28. The air is discharged through the through hole 23, which slows down the movement speed of the sliding plate 24 and creates a damping effect. Combined with the elastic restoring force of the spring 27, double buffering is achieved, reducing the impact damage to the end of the welded pipe 1 and the anti-corrosion lining layer, and improving the protection effect.
[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 welded pipe end protection structure with anti-corrosion lining, comprising a welded pipe (1), characterized in that: A protective component (3) is provided on the right side of the welded pipe (1); The protective component (3) includes a protective sleeve (31). A circular groove (32) is provided on the left side of the protective sleeve (31), and a circular groove (34) is provided inside the protective sleeve (31) on the right side of the circular groove (32). The diameter of the circular groove (32) is larger than the diameter of the circular groove (34). Two sets of clamping members (33) are movably engaged on the inner wall of the circular groove (32). The two sets of clamping members (33) have different diameters, with one set of clamping members (33) having a smaller diameter than the other set. The clamping members (33) of the assembly are arranged in different diameters. The clamping member (33) with a smaller diameter is engaged with the inner side of the inner wall of the annular groove (32), and the outer wall of the clamping member (33) is adapted to the inner wall of the end of the welded pipe (1). The clamping member (33) with a larger diameter is engaged with the outer side of the inner wall of the annular groove (32), and the inner wall of the clamping member (33) is adapted to the outer wall of the end of the welded pipe (1). A buffer assembly (2) is provided on the right side of the protective sleeve (31) to provide buffer for the protective sleeve (31) and the welded pipe (1).
2. The welded pipe end protection structure with anti-corrosion lining according to claim 1, characterized in that: Both sets of clamping members (33) are circular rubber rings, and the left side of the opposite face of the two sets of clamping members (33) is set as an inclined surface.
3. The welded pipe end protection structure with anti-corrosion lining according to claim 2, characterized in that: The rubber ring is made of rubber, and the inner wall of the protective sleeve (31) is set as an inclined surface on the left side near the circular groove (34).
4. The welded pipe end protection structure with anti-corrosion lining according to claim 1, characterized in that: The buffer assembly (2) includes a sliding sleeve (21) that slides on the outer wall of the protective sleeve (31). A sliding disc (24) is fixedly connected to the left inner wall of the sliding sleeve (21), and a sliding disc (25) is fixedly connected to the left side of the sliding disc (24). A slot (28) is provided on the right side of the protective sleeve (31), and a sliding groove (26) is provided on the inner wall of the slot (28) near the right side. The sliding disc (25) is slidably connected to the inner wall of the sliding groove (26).
5. The welded pipe end protection structure with anti-corrosion lining according to claim 4, characterized in that: The left side of the slide plate (25) is elastically connected to the protective sleeve (31) by a spring (27), which is located inside the slot (28).
6. The welded pipe end protection structure with anti-corrosion lining according to claim 4, characterized in that: A buffer pad (22) is fixedly connected to the right side of the sliding sleeve (21).
7. The welded pipe end protection structure with anti-corrosion lining according to claim 4, characterized in that: A through hole (23) is provided at the center of each of the slide plate 2 (25), slide plate 1 (24), slide sleeve (21) and buffer pad (22).
8. The welded pipe end protection structure with anti-corrosion lining according to claim 7, characterized in that: The diameter of the second slide (25) is larger than the diameter of the first slide (24), and multiple sets of the through holes (23) are connected in a continuous manner.