Corrugated pipe type large temperature difference unit pipe expansion device

Abstract

The utility model relates to pipeline telescopic device technical field discloses corrugated pipe type big temperature difference unit pipeline telescopic device, including the corrugated pipe, the outer wall right side fixed connection of corrugated pipe has the dismounting mechanism, the dismounting mechanism is used for quick installation pipeline, the inner wall of dismounting mechanism sets up sealing mechanism, sealing mechanism is used for sealing when connecting, the dismounting mechanism includes fixed sleeve, fixed sleeve sets up in the right side of corrugated pipe, the inner wall of fixed sleeve is provided with the connecting pipe, the inner wall all around of fixed sleeve is fixedly connected with extrusion subassembly, the outer wall left side of extrusion subassembly is provided with the connecting assembly, the outer wall of connecting assembly is provided with fixed assembly with thread, in the utility model, the inner wall all around of fixed sleeve is fixed with spring, and one side fixed on the outer wall of extrusion sleeve board of limiting shaft set up on the outer wall of spring simultaneously, to realize quick installation dismounting to pipeline, satisfy the use demand.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline expansion joints, and in particular to a corrugated pipe type large temperature difference unit pipeline expansion joint. Background Technology

[0002] In various industrial production and infrastructure construction, pipelines serve as crucial carriers for the transport of materials and energy, widely distributed across numerous fields such as petrochemicals, power energy, and district heating. With the expansion of industrial scale and technological innovation, large temperature difference conditions are becoming increasingly common in pipeline systems, posing stringent challenges to pipeline expansion joints. This has become a key background factor driving the development of corrugated pipe-type large temperature difference unit pipeline expansion joints. With advancements in materials science and manufacturing processes, the performance of metal corrugated pipe materials has continuously improved, laying the foundation for the research and development of new expansion joints. The emergence of high-performance materials such as stainless steel and nickel-based alloys has enabled… Corrugated pipes possess superior high-temperature resistance, corrosion resistance, and high strength, enabling them to operate stably under harsh conditions. Furthermore, advanced manufacturing processes such as hydroforming and laser welding allow for precise control of the corrugated shape, dimensions, and welding quality, enhancing their expansion and contraction performance and fatigue life. Supported by these technologies, corrugated pipe-type expansion joints for large temperature difference units have emerged and are gradually replacing traditional expansion joints, becoming the mainstream solution for addressing the thermal expansion and contraction of pipelines under large temperature difference conditions. However, their practical application still faces numerous technical challenges that require improvement, driving continuous innovation and development in related technologies.

[0003] Currently, the expansion joints of pipelines on the market mainly consist of core expansion components and connecting and sealing components. In the petrochemical industry, the process flow of oil refining and chemical plants involves multiple high-temperature and high-pressure reactions and media transportation links. Under such conditions, the thermal expansion and contraction of pipelines is significant. If there is a lack of effective expansion compensation, the pipeline will be subjected to huge thermal stress, which can easily lead to weld cracking, seal failure, and media leakage. This not only causes economic losses but may also bring serious safety hazards and environmental pollution risks. In the field of deep-sea oil and gas exploration, subsea pipelines are laid at depths of thousands of meters on the seabed. The working environment is complex and harsh. Pipeline installation requires the use of professional deep-sea operation equipment and divers. Every installation and dismantling operation is accompanied by high costs and huge risks. According to statistics, the cost of a conventional subsea pipeline expansion joint installation and maintenance operation is as high as several million yuan just for equipment rental and personnel input. Moreover, due to the influence of ocean currents and seabed topography, the construction window is short, and even a slight delay may cause the entire project to stop. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a corrugated pipe type large temperature difference unit pipeline expansion device, which aims to improve the problem that traditional unit pipeline expansion devices in the prior art are inconvenient to install and disassemble pipelines.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a corrugated pipe type large temperature difference unit pipe expansion device, including a corrugated pipe, a disassembly mechanism is fixedly connected to the right side of the outer wall of the corrugated pipe, the disassembly mechanism is used for quick installation of the pipe, and a sealing mechanism is provided on the inner wall of the disassembly mechanism, the sealing mechanism is used for sealing during connection;

[0006] The disassembly mechanism includes a fixing sleeve, which is located on the right side of the bellows. A connecting pipe is provided on the inner wall of the fixing sleeve. Extrusion components are fixedly connected to all four sides of the inner wall of the fixing sleeve. A connecting component is provided on the left side of the outer wall of the extrusion component. A fixing component is threadedly connected to the outer wall of the connecting component.

[0007] As a further description of the above technical solution:

[0008] The sealing mechanism includes a fixing plate, which is fixed around the outer wall of the fixing component. A connecting shaft is slidably connected to the inner wall of the fixing plate. Adjusting components are fixedly connected to the left and right ends of the outer wall of the connecting shaft. A sealing component one is provided on the inner wall of the fixing component, and a sealing component two is provided on the left side of the outer wall of the connecting component.

[0009] As a further description of the above technical solution:

[0010] The extrusion assembly includes a limiting shaft that slides on the inner wall of a fixed sleeve. Springs are fixedly connected to all four sides of the inner wall of the fixed sleeve, and extrusion plates are fixedly connected to the other ends of the multiple springs.

[0011] As a further description of the above technical solution:

[0012] The connecting assembly includes a flange ring, which is threaded to the left side of the outer wall of the fixed sleeve. A sealing groove is provided on the right side of the outer wall of the flange ring, and a sealing plate is fixedly connected to the left side of the outer wall of the flange ring.

[0013] As a further description of the above technical solution:

[0014] The fixing assembly includes a second flange ring, the outer wall of which is fixed to the left and right ends of the bellows. The inner wall of the second flange ring is slidably connected to a threaded shaft, and the outer walls of the multiple threaded shafts are threadedly connected to nuts.

[0015] As a further description of the above technical solution:

[0016] The adjustment assembly includes a second nut, which is fixed to the left and right ends of the outer wall of the connecting shaft, and the outer wall of the second nut is threadedly connected to a second threaded shaft.

[0017] As a further description of the above technical solution:

[0018] The sealing assembly includes a sealing ring, which is fixed around the outer right side of the flange ring 2, and a positioning shaft is fixedly connected to the inner wall of multiple sealing rings.

[0019] As a further description of the above technical solution:

[0020] The second sealing component includes a second sealing groove, which is located on the left side of the outer wall of the sealing plate. Sealing holes are provided around the inner wall of the second sealing groove.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, springs are fixed around the inner wall of the fixed sleeve, and a limiting shaft on the outer wall of the spring is fixed to the outer wall of the extrusion sleeve. The outer wall slides on the inner wall of the fixed sleeve, so that the inner wall can automatically adapt when the connecting pipe is installed. At the same time, the spring's elasticity seals the installation of the connecting pipe. Meanwhile, multiple threaded shafts fixed on the left side of the outer wall of the fixed sleeve can fix the flange ring 1 and flange ring 2 through the threaded shafts connected to the outer wall, thereby realizing the quick installation and disassembly of the pipeline and meeting the usage requirements.

[0023] 2. In this utility model, a fixing plate is fixed around the outer wall of flange ring two, and a connecting shaft slides on its inner wall. Nuts two are fixed at both ends of the connecting shaft. The threaded shaft two connected to the outer wall of nut two allows the bellows to freely contract and extend. The positioning shaft and sealing ring fixed on the inner wall of flange ring two can engage and position the sealing groove two and sealing hole opened on the outer wall of the sealing plate, thereby achieving the sealing effect of the pipeline after connection and meeting the usage requirements. Attached Figure Description

[0024] Figure 1 This is a perspective view of the front of the corrugated pipe of the bellows-type large temperature difference unit pipeline expansion device proposed in this utility model.

[0025] Figure 2 This is a structural diagram of the fixed sleeve of the corrugated pipe type large temperature difference unit pipeline expansion device proposed in this utility model;

[0026] Figure 3 This is a structural diagram of the connecting shaft of the bellows-type large temperature difference unit pipe expansion device proposed in this utility model;

[0027] Figure 4 This is a structural diagram of the flange ring of the bellows-type large temperature difference unit pipeline expansion device proposed in this utility model.

[0028] Figure 5This is a schematic diagram of the fixed sleeve structure of the corrugated pipe type large temperature difference unit pipeline expansion device proposed in this utility model.

[0029] Legend:

[0030] 1. Bellows; 2. Disassembly mechanism; 201. Fixing sleeve; 202. Connecting pipe; 203. Extrusion assembly; 2031. Limiting shaft; 2032. Spring; 2033. Extrusion sleeve plate; 204. Connecting assembly; 2041. Flange ring one; 2042. Sealing groove one; 2043. Sealing plate; 205. Fixing assembly; 2051. Flange ring two; 2052. Threaded shaft one; 2053. Nut one; 3. Sealing mechanism; 301. Fixing plate; 302. Connecting shaft; 303. Adjusting assembly; 3031. Threaded shaft two; 3032. Nut two; 304. Sealing assembly one; 3041. Positioning shaft; 3042. Sealing ring; 305. Sealing assembly two; 3051. Sealing groove two; 3052. Sealing hole. Detailed Implementation

[0031] 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.

[0032] Please see the appendix Figure 3 - Appendix Figure 5 An embodiment of this utility model is provided: a corrugated pipe type large temperature difference unit pipe expansion device, including a corrugated pipe 1, a disassembly mechanism 2 fixedly connected to the right side of the outer wall of the corrugated pipe 1, the disassembly mechanism 2 is used for quick installation of the pipe, and a sealing mechanism 3 is provided on the inner wall of the disassembly mechanism 2, the sealing mechanism 3 is used for sealing during connection;

[0033] The disassembly mechanism 2 includes a fixed sleeve 201, which is located on the right side of the bellows 1. A connecting pipe 202 is provided on the inner wall of the fixed sleeve 201. Extrusion components 203 are fixedly connected to all four sides of the inner wall of the fixed sleeve 201. A connecting component 204 is provided on the left side of the outer wall of the extrusion component 203. A fixed component 205 is threadedly connected to the outer wall of the connecting component 204. The connecting component 204 has a special shape and size, which can achieve a tight fit with the extrusion component 203 and the subsequent fixed component 205. The fixed component 205 is threadedly connected to the outer wall of the connecting component 204.

[0034] Specifically, a disassembly mechanism 2 is fixedly connected to the right side of the outer wall of the corrugated pipe 1 by welding or high-strength bonding. This disassembly mechanism 2 enables quick and convenient pipe installation, greatly saving installation time and labor costs. The inner wall of the disassembly mechanism 2 is cleverly equipped with a sealing mechanism 3, which can provide a reliable sealing effect when the pipe is connected, effectively preventing media leakage and ensuring the safe and stable operation of the system. The disassembly mechanism 2 includes a fixing sleeve 201, which is made of high-strength and corrosion-resistant metal material. It is set on the right side of the corrugated pipe 1 through precise size matching and a stable connection method, serving as the basic support component of the entire disassembly mechanism 2. A connecting pipe 202 is provided on the inner wall of the fixing sleeve 201. The material and specifications of the connecting pipe 202 are determined according to actual usage requirements. It is initially positioned with the fixing sleeve 201 through a specific connection method. The inner wall of the fixing sleeve 201 is fixedly connected to the extrusion assembly 203 by welding or integral forming. The extrusion assembly 203 is composed of elastic material and rigid support structure, which can generate elastic deformation when subjected to external force.

[0035] Please see the appendix Figure 2 - Appendix Figure 4 The sealing mechanism 3 includes a fixing plate 301, which is fixed around the outer wall of the fixing component 205. A connecting shaft 302 is slidably connected to the inner wall of the fixing plate 301. Adjusting components 303 are fixedly connected to the left and right ends of the outer wall of the connecting shaft 302. A sealing component 1 304 is provided on the inner wall of the fixing component 205. A sealing component 2 305 is provided on the left side of the outer wall of the connecting component 204. The inner wall of the fixing component 205 is specially designed to provide a sealing component 1 304. The sealing component 1 304 includes a sealing groove and a sealing gasket. The size and shape of the sealing groove are adapted to the sealing gasket, which can fit tightly and effectively prevent media leakage. The left side of the outer wall of the connecting component 204 is also finely processed.

[0036] Specifically, the sealing mechanism 3 includes a fixing plate 301, which is made of high-strength and wear-resistant metal. It is firmly fixed to the outer wall of the fixing component 205 by high-precision welding or bolt fastening, providing a solid support foundation for the entire sealing mechanism 3. The inner wall of the fixing plate 301 is finely processed to form a smooth sliding track, which is slidably connected to a connecting shaft 302. The connecting shaft 302 is made of metal with good toughness and fatigue resistance, and its surface is treated with rust prevention and lubrication to ensure smooth sliding. The left and right ends of the outer wall of the connecting shaft 302 are fixedly connected to adjusting components 303 by welding or integral forming. The adjusting components 303 are composed of an adjustable thread structure and elastic elements, which can be flexibly adjusted according to actual sealing requirements, thereby achieving precise control of the sealing degree. The second sealing component 305 includes a sealing protrusion and a sealing strip. The sealing protrusion can cooperate with the sealing groove in the first sealing component 304, and the sealing strip further enhances the sealing effect, ensuring reliable sealing performance when the connecting component 204 is connected to the fixing component 205.

[0037] Please see the appendix Figure 1 - Appendix Figure 3 The extrusion assembly 203 includes a limiting shaft 2031, which slides on the inner wall of the fixed sleeve 201. Springs 2032 are fixedly connected to all four sides of the inner wall of the fixed sleeve 201. An extrusion plate 2033 is fixedly connected to the other end of each spring 2032. The connecting assembly 204 includes a flange ring 2041, which is threaded to the left side of the outer wall of the fixed sleeve 201. A sealing groove 2042 is formed on the right side of the outer wall of the flange ring 2041. A sealing plate 2043 is fixedly connected to the left side of the outer wall of the flange ring 2041. The fixing assembly 205 includes a flange ring 2051, whose outer wall is fixed... At the left and right ends of the bellows 1, the right side of the outer wall of flange ring 2041 is finely machined to form a sealing groove 2042. The size and shape of the sealing groove 2042 are precisely calculated to fit tightly with the sealing gasket and effectively prevent media leakage. The left side of the outer wall of flange ring 2041 is fixedly connected to a sealing plate 2043 by welding or integral molding. The material and thickness of the sealing plate 2043 are determined according to the actual sealing requirements, which can further enhance the sealing performance of the connection. The inner wall of flange ring 2051 is slidably connected to threaded shafts 2052, and the outer walls of multiple threaded shafts 2052 are threadedly connected to nuts 2053.

[0038] Specifically, the extrusion assembly 203 includes a limiting shaft 2031, which is made of a high-strength and smooth-surfaced metal rod. It slides smoothly along the inner wall of the fixed sleeve 201 via a specific guide structure, ensuring no deviation or jamming occurs during the extrusion process. Springs 2032 are fixedly connected to the inner wall of the fixed sleeve 201 around its perimeter via welding or integral molding. Multiple springs 2032 are made of materials with good elasticity and fatigue resistance. Their other ends are fixedly connected to an extrusion sleeve plate 2033 via bolts or welding. The surface of the extrusion sleeve plate 2033 undergoes special treatment, providing a certain degree of friction and wear resistance. The connecting component 204 is capable of applying uniform and stable pressure to the connecting parts when compressed. The connecting component 204 includes a flange ring 2041, which is made of high-strength metal material. Its inner wall is provided with threads that are compatible with the outer wall of the fixing sleeve 201. By rotating the flange ring 2041, its threads can be connected to the left side of the outer wall of the fixing sleeve 201 to achieve initial connection positioning. The fixing component 205 includes a flange ring 2051, which is made of a material that matches the bellows 1. Its outer wall is fixed to the left and right ends of the bellows 1 by welding or high-strength bonding to provide stable support for the entire connecting structure.

[0039] Please see the appendix Figure 1 - Appendix Figure 3 The adjusting component 303 includes a second nut 3032, which is fixed to the left and right ends of the outer wall of the connecting shaft 302. A threaded shaft 3031 is threadedly connected to the outer wall of the second nut 3032. The sealing component 304 includes a sealing ring 3042, which is fixed around the right side of the outer wall of the second flange ring 2051. A positioning shaft 3041 is fixedly connected to the inner wall of multiple sealing rings 3042. The sealing component 305 includes a sealing groove 3051. The sealing component 304 includes a sealing ring 3042, which is made of rubber or silicone material with excellent elasticity and sealing performance. It is firmly fixed to the outer right side of the flange ring 2051 through a special bonding process, providing the first line of sealing defense for the connection. The inner walls of multiple sealing rings 3042 are fixedly connected to the positioning shaft 3041 by embedding or welding. The positioning shaft 3041 is made of high-strength metal material, and its shape and size are carefully designed to ensure that the sealing rings 3042 maintain the correct position and shape during installation and use, further enhancing the sealing effect. The sealing groove 2 3051 is opened on the left side of the outer wall of the sealing plate 2043, and the inner wall of the sealing groove 2 3051 is provided with sealing holes 3052 on all four sides.

[0040] Specifically, the adjusting component 303 includes a second nut 3032, which is made of a high-strength metal material with good thread wear resistance. It is securely fixed to the left and right ends of the outer wall of the connecting shaft 302 by welding or integral molding, providing a reliable connection base for subsequent adjustment operations. The outer wall of the second nut 3032 has a fine threaded structure, which is threaded to a second threaded shaft 3031. The second threaded shaft 3031 is made of a high-strength metal rod with high thread precision, and its surface is rust-proofed. The adjustment is achieved by rotating the second threaded shaft 3031 and the second nut 3032. The cooperation of 032 enables precise adjustment of the position of the connecting shaft 302, thereby meeting different sealing and connection requirements. The sealing component 2 305 includes the sealing groove 2 3051, which is opened on the left side of the outer wall of the sealing plate 2043. Its size and shape are adapted to the sealing ring 3042, and it can fit tightly with the sealing ring 3042 during connection to form an effective sealing space. The inner wall of the sealing groove 2 3051 is finely processed and has a sealing hole 3052. The diameter and depth of the sealing hole 3052 are determined according to the actual sealing requirements.

[0041] Working principle: Springs 2032 are fixed around the inner wall of the fixed sleeve 201. At the same time, the limiting shaft 2031 set on the outer wall of the spring 2032 is fixed on one side to the outer wall of the extrusion sleeve 2033. The outer wall slides on the inner wall of the fixed sleeve 201, so that the inner wall can automatically adapt when the connecting pipe 202 is installed. At the same time, the elasticity of the spring 2032 seals the installation of the connecting pipe 202. Meanwhile, multiple threaded shafts 2052 fixed on the left side of the outer wall of the fixed sleeve 201 can fix the flange ring 2041 and flange ring 2051 through the threaded shafts 2052 connected to the outer wall, thereby realizing the quick installation and disassembly of the pipeline and meeting the usage requirements.

[0042] A fixing plate 301 is fixed around the outer wall of flange ring 2051, and a connecting shaft 302 slides on its inner wall. Nuts 3032 are fixed at both ends of the connecting shaft 302. The threaded shaft 3031 connected to the outer wall of nut 3032 allows the bellows 1 to freely contract and extend. The positioning shaft 3041 and sealing ring 3042 fixed on the inner wall of flange ring 2051 can engage and position the sealing groove 3051 and sealing hole 3052 on the outer wall of sealing plate 2043, thereby achieving a sealing effect after the pipeline is connected and meeting the usage requirements.

[0043] 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 corrugated pipe type expansion joint for large temperature difference units, comprising a corrugated pipe (1), characterized in that: A disassembly mechanism (2) is fixedly connected to the right side of the outer wall of the corrugated pipe (1). The disassembly mechanism (2) is used for quick installation of the pipe. A sealing mechanism (3) is provided on the inner wall of the disassembly mechanism (2). The sealing mechanism (3) is used for sealing during connection. The disassembly mechanism (2) includes a fixing sleeve (201), which is located on the right side of the bellows (1). A connecting pipe (202) is provided on the inner wall of the fixing sleeve (201). A pressing component (203) is fixedly connected to all four sides of the inner wall of the fixing sleeve (201). A connecting component (204) is provided on the left side of the outer wall of the pressing component (203). A fixing component (205) is threadedly connected to the outer wall of the connecting component (204).

2. The corrugated pipe type large temperature difference unit pipeline expansion device according to claim 1, characterized in that: The sealing mechanism (3) includes a fixing plate (301), which is fixed around the outer wall of the fixing component (205). A connecting shaft (302) is slidably connected to the inner wall of the fixing plate (301). Adjusting components (303) are fixedly connected to the left and right ends of the outer wall of the connecting shaft (302). A sealing component one (304) is provided on the inner wall of the fixing component (205), and a sealing component two (305) is provided on the left side of the outer wall of the connecting component (204).

3. The corrugated pipe type large temperature difference unit pipeline expansion device according to claim 1, characterized in that: The extrusion assembly (203) includes a limiting shaft (2031) that slides on the inner wall of the fixed sleeve (201). Springs (2032) are fixedly connected to all four sides of the inner wall of the fixed sleeve (201), and the other end of the multiple springs (2032) is fixedly connected to an extrusion sleeve plate (2033).

4. The corrugated pipe type large temperature difference unit pipeline expansion device according to claim 1, characterized in that: The connecting assembly (204) includes a flange ring (2041), which is threaded to the left side of the outer wall of the fixed sleeve (201). A sealing groove (2042) is provided on the right side of the outer wall of the flange ring (2041), and a sealing plate (2043) is fixedly connected to the left side of the outer wall of the flange ring (2041).

5. The corrugated pipe type large temperature difference unit pipeline expansion device according to claim 1, characterized in that: The fixing component (205) includes a flange ring two (2051), the outer wall of the flange ring two (2051) is fixed to the left and right ends of the bellows (1), and the inner wall of the flange ring two (2051) is slidably connected with a threaded shaft one (2052), and the outer wall of multiple threaded shafts one (2052) is threadedly connected with nuts one (2053).

6. The corrugated pipe type large temperature difference unit pipeline expansion device according to claim 2, characterized in that: The adjustment component (303) includes a second nut (3032), which is fixed to the left and right ends of the outer wall of the connecting shaft (302), and the outer wall of the second nut (3032) is threadedly connected to a second threaded shaft (3031).

7. The corrugated pipe type large temperature difference unit pipeline expansion device according to claim 2, characterized in that: The sealing assembly one (304) includes a sealing ring (3042), which is fixed around the outer right side of the flange ring two (2051), and a positioning shaft (3041) is fixedly connected to the inner wall of the plurality of sealing rings (3042).

8. The corrugated pipe type large temperature difference unit pipeline expansion device according to claim 2, characterized in that: The second sealing component (305) includes a second sealing groove (3051), which is located on the left side of the outer wall of the sealing plate (2043). Sealing holes (3052) are provided around the inner wall of the second sealing groove (3051).

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