A gas pipeline anticorrosion joint structure

Abstract

The utility model discloses a kind of gas pipeline anticorrosive joint structures, including main pipeline connecting part, the main pipeline connecting part outside is equipped with groove, the groove is equipped with protective layer, the protective layer extends towards the opening of the main pipeline connecting part, and detachably connected with fixed part, the fixed part outside is threadedly connected with straight-through pipe clamp;The main pipeline connecting part and the protective layer outside heat shrink sleeve are equipped with heat shrink tube, the heat shrink tube outside is equipped with for the protective layer pressure fixed throat clamp. Advantage lies in: protective layer can provide additional protective layer, prevent the erosion of external environment to pipeline;Protective layer is threadedly connected with straight-through pipe clamp by fixed part, ensure firm and reliable;Heat shrink tube is sleeved on the main pipeline connecting part and protective layer outside, further enhance the protection effect, and heat shrink tube is through throat clamp and compresses protective layer, improve pipeline anticorrosive effect, prolong the service life of pipeline.

Description

Technical Field

[0001] This utility model relates to the field of gas pipeline connection, specifically to a gas pipeline anti-corrosion joint structure. Background Technology

[0002] In gas transmission systems, pipe joints are the weakest link in the entire system, and their corrosion resistance directly affects the service life and operational safety of the pipeline. Currently, gas pipe joints typically use ordinary sleeve connections or flange connections. These connection methods are prone to problems such as poor sealing and corrosion layer breakage when faced with changes in pipe diameter.

[0003] During the actual installation of gas pipelines, traditional joint structures often fail to provide a tight seal between the protective layer and the pipeline surface, leading to gaps that allow moisture, oxygen, and corrosive media to penetrate and cause corrosion. Furthermore, existing methods of installing and securing the protective layer are unreliable, prone to loosening and detachment over long-term use, further reducing the joint's corrosion protection effectiveness. Utility Model Content

[0004] The purpose of this utility model is to provide a gas pipeline anti-corrosion joint structure to solve the above problems, as detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This utility model provides a gas pipeline anti-corrosion joint structure, including a main pipeline connection part, a groove provided on the outside of the main pipeline connection part, a protective layer provided in the groove, the protective layer extending toward the opening of the main pipeline connection part and detachably connected to a fixing part, and a straight pipe clamp threadedly connected to the outside of the fixing part; a heat shrink tube is heat-shrinkly fitted on the outside of the main pipeline connection part and the protective layer, and a hose clamp for pressing and fixing the protective layer is provided on the outside of the heat shrink tube.

[0007] As an optional solution to the technical solution in this application, the cross-section of the main pipe connection increases near its opening and is connected by a "V"-shaped structure. The protective layer extends from the small cross-section of the main pipe connection to the large cross-section. The protective layer is made of an elastic modified polymer material to adapt to the deformation of the "V"-shaped transition section of the main pipe connection and maintain sealing performance.

[0008] As an optional solution to the technical solution of this application, the groove has a concave-convex structure, and the inner wall of the protective layer is provided with a protruding structure that is adapted to the groove, and it is interference-fitted with the groove in the installed state.

[0009] As an optional solution to the technical solution of this application, the inner wall of the protective layer is supported by the main pipe connection part, and the "V"-shaped transition section of the main pipe connection part has a smooth inclined structure.

[0010] As an optional solution to the technical solution of this application, the opening of the protective layer extends to the outside of the opening of the main pipe connection and is connected with a connecting collar. The fixing part includes a connecting pipe part with a pipe body structure. The connecting pipe part is provided with a connecting flange on the side facing the connecting collar, and the connecting collar is bolted to the connecting flange.

[0011] As an optional solution to the technical solution of this application, the outer side of the connecting pipe is provided with multiple ribs extending along its axial direction.

[0012] As an optional solution to the technical solution of this application, the fixing part is threadedly connected to the connecting pipe part.

[0013] The beneficial effects are:

[0014] The protective layer provides an additional layer of protection against external environmental corrosion of the pipeline; the protective layer is connected to the straight pipe clamp by a threaded fastener to ensure a secure fixation; the heat shrink tubing is fitted onto the main pipeline connection and the outside of the protective layer, further enhancing the protective effect, and the heat shrink tubing is compressed into the protective layer by a hose clamp, improving the pipeline's corrosion resistance and extending its service life. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the internal structure of this utility model;

[0017] Figure 2 This is the front view of this utility model.

[0018] The annotations in the attached figures are explained as follows:

[0019] 1. Main pipe connection; 2. Trench body; 201. Protective layer; 202. Connecting collar; 3. Heat shrink tubing; 4. Hose clamp; 5. Fixing part; 501. Rib; 502. Connecting pipe part; 503. Connecting flange; 6. Straight pipe clamp. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] First embodiment:

[0022] See Figures 1-2 As shown, this utility model provides a gas pipeline anti-corrosion joint structure, including a main pipeline connection part 1 with a groove 2 on its outer side. The groove 2 is equipped with a protective layer 201 inside. The protective layer 201 not only forms protection inside the groove, but also extends to the opening of the main pipeline connection part 1. The extended part is detachably connected to the fixing part 5 to ensure the stability of the protective layer.

[0023] The fixing part 5 has threads on the outside, and is connected to the straight pipe clamp 6 by threads. This connection method facilitates the assembly and disassembly of the components, and at the same time, the straight pipe clamp 6 can further strengthen the fixing part 5 to the protective layer 201, preventing the protective layer from loosening during use.

[0024] Heat shrink tubing 3 is wrapped around the outside of the main pipe connection 1 and the protective layer 201 using a heat shrink sleeve. When heated, the heat shrink tubing 3 will adhere tightly to the surface, forming a sealed protective layer that can effectively prevent external moisture, impurities, and other contaminants from corroding the pipe connection.

[0025] The heat shrink tubing 3 is fitted with a hose clamp 4 on the outside. By tightening the hose clamp 4, pressure can be applied to the heat shrink tubing 3, thereby pressing the protective layer 201 tightly onto the main pipe connection part 1, avoiding gaps between the protective layer and the main pipe, and ensuring the stability and anti-corrosion effect of the entire anti-corrosion joint structure.

[0026] The protective layer 201 achieves excellent corrosion protection through the synergistic effect of its multi-layered structure. Its overall structure forms a tight protective system from the inside out, with each layer's material and function highly matched. The innermost layer directly adheres to the metal surface of the main pipeline connection 1, serving as the first line of defense against corrosion. This layer uses a highly adhesive anti-corrosion primer material, such as a special primer made from a water-based modified alkyd rust-inhibiting emulsion as a base, compounded with nano-functional materials, rust-inhibiting pigments, and corrosion inhibitors. The water-based modified alkyd emulsion forms a strong chemical bond with the metal surface, ensuring the primer is not easily peeled off; the nano-functional materials fill the tiny pores on the metal surface, reducing the channels for corrosive media intrusion; and the rust-inhibiting pigments and corrosion inhibitors inhibit the activity of metal ions through chemical action, effectively isolating the pipeline metal from external corrosive media such as acids, alkalis, water vapor, and salt, preventing oxidation and rusting reactions on the metal surface from the source.

[0027] The intermediate layer is a corrosion-resistant reinforcement layer, which can be made of high-performance polyurethane anti-corrosion coating. This coating has a stable molecular structure and excellent weather resistance, maintaining stable performance within a temperature range of -40℃ to 60℃. Even when exposed to prolonged outdoor conditions of sun, rain, and temperature fluctuations, it is not prone to cracking or chalking. Simultaneously, its dense film structure further blocks the penetration path of corrosive media, forming a "double barrier" with the inner primer, significantly improving the protection level of the main pipeline connection 1 and slowing down the corrosion process.

[0028] The outermost layer is a wear-resistant protective layer, serving the dual purpose of physical protection and external corrosion prevention. This layer typically includes specialized coatings such as high-chlorinated polyethylene paint. The paint film thickness can reach 80-120μm, and it is tough and elastic, possessing excellent weather resistance, corrosion resistance, and flame retardancy. In practical applications, it effectively resists physical damage such as scratches, impacts, and friction, preventing the inner anti-corrosion structure from failing due to external forces. Simultaneously, its chemical stability further isolates corrosive components in the air, adding an "outer shield" to the entire protective system.

[0029] This three-layer protective layer 201 provides long-lasting and reliable corrosion protection for the main pipeline connection 1 of the gas pipeline in a comprehensive and multi-layered manner, significantly extending the service life of the pipeline, reducing the risks of leakage and maintenance caused by corrosion, and ensuring the safety and stability of the gas transmission process.

[0030] The second embodiment differs from the first embodiment in that:

[0031] The main pipeline connection 1 adopts a special structural design near the opening. Its cross-section gradually increases from the conventional small size to the opening end, and the connection between the two sections of pipeline with different cross-sections is achieved through a smooth "V" shaped transition structure. This "V" shaped transition section not only optimizes the flow path of gas in the pipeline and reduces local resistance, but also enhances the structural strength of the connection part, and can better withstand the pressure load inside the pipeline.

[0032] To ensure the corrosion resistance and sealing of this special structural part, the protective layer 201 is laid from the starting position of the small section of the main pipe connection 1 and extends continuously along the outer wall of the pipe to the edge of the opening of the large section, thus achieving full coverage protection of the entire transition area.

[0033] In addition, the protective layer 201 is made of an elastic modified polymer material, which adapts to the deformation of the "V"-shaped transition section of the main pipeline connection 1 and maintains the sealing performance. The protective layer 201 has a certain degree of elasticity, thus possessing good tensile properties and resilience. In practical applications, this elastic material can perfectly adapt to the curved surface changes of the "V"-shaped transition section of the main pipeline connection 1: when the pipeline undergoes slight deformation due to temperature changes, pressure fluctuations, or installation stress, the protective layer 201 can expand and contract synchronously with the pipeline surface, avoiding cracking or peeling. At the same time, its own elastic tension can always maintain a tight fit with the outer wall of the pipeline, forming a continuous and gapless sealing interface even at the corner of the "V"-shaped structure, effectively preventing water vapor, corrosive media, etc. from intruding from the gaps in the transition section, ensuring the integrity and reliability of the entire anti-corrosion system of the main pipeline connection 1.

[0034] The tank 2 has a concave-convex structure, which is regularly distributed along the outer periphery of the main pipe connection 1. The transition between the concave and convex parts is smooth. To precisely match the concave-convex structure of the tank 2, the inner wall of the protective layer 201 is specially provided with corresponding protruding structures. The shape, size and distribution density of these protruding structures are perfectly matched with the concave parts of the tank 2.

[0035] In the installed state, the protruding structure on the inner wall of the protective layer 201 is interference-fitted with the groove 2, that is, the actual size of the protruding structure of the protective layer 201 is slightly larger than the size of the recess of the groove 2, so that the protective layer 201 can be tightly embedded in the groove 2 after installation. Relying on the elasticity of the material itself to generate continuous extrusion force, it not only effectively prevents the protective layer 201 from shifting or falling off during use, but also further improves the sealing performance between the two, preventing external corrosive media from invading the main pipeline connection part 1 through the gap.

[0036] Meanwhile, the inner wall of the protective layer 201 receives reliable support through the main pipeline connection 1. The "V"-shaped transition section of the main pipeline connection 1 adopts a smooth and inclined structural design. This structure allows the inner wall of the protective layer 201 to fit evenly against the surface of the main pipeline connection 1 when covering the transition section, avoiding excessive local stress on the protective layer 201 due to sharp edges or protrusions in the transition section, which could lead to damage or sealing failure. The smooth and inclined transition section structure provides a continuous and stable support surface for the protective layer 201, ensuring that the protective layer 201 can fully perform its anti-corrosion and sealing functions, and guaranteeing the stability and safety of the entire gas pipeline anti-corrosion joint structure.

[0037] The third embodiment differs from the first embodiment in that:

[0038] The protective layer 201 extends from its opening to the outside of the main pipeline connection 1 opening and is connected to a connecting collar 202. The connecting collar 202 is made of a modified polymer compatible with the material of the protective layer 201 and is tightly bonded to the protective layer 201 through hot-melt welding or integral molding, ensuring a seamless connection and preventing corrosion resistance from diminishing at this point. The fixing part 5 includes a connecting pipe 502 with a pipe-like structure. The inner diameter of this pipe is adapted to the flow port diameter of the main pipeline connection 1 to ensure smooth gas transmission. On the side of the connecting pipe 502 facing the connecting collar 202, a connecting flange 503 is integrally formed. The diameter of the connecting flange 503 is slightly larger than the outer diameter of the connecting pipe 502, and the position and number of bolt holes on its end face correspond perfectly to those of the connecting collar 202. During installation, the connecting collar 202 and the connecting flange 503 are tightly connected by high-strength corrosion-resistant bolts. A sealing gasket can also be added to the bolt connection to further enhance the sealing of the connection and prevent water vapor or corrosive media from entering through the connection gaps.

[0039] To enhance the structural strength of the connecting pipe section 502, multiple ribs extending along the axial direction are evenly distributed on its outer side. These ribs are fixed to the pipe surface by welding or integral molding. The height of the ribs is typically 1 / 5 to 1 / 4 of the outer diameter of the connecting pipe section 502, and the length is consistent with the effective pipe section of the connecting pipe section 502. The ribs not only enhance the deformation resistance of the connecting pipe section 502 under axial and radial forces, but also provide anti-slip properties during pipe installation and use, making it easier for construction personnel to grip and operate.

[0040] Furthermore, the fixing part 5 and the connecting pipe part 502 are assembled using a threaded connection. The corresponding connecting end of the fixing part 5 has an internal thread, while the connecting end of the connecting pipe part 502 has a matching external thread. The thread profile and pitch are precisely designed to ensure sufficient tightness and connection strength after connection. Thread sealant can also be applied to the threaded connection area, which enhances the sealing effect and prevents the threads from loosening due to vibration or other factors during long-term use, ensuring the stability and reliability of the connection between the fixing part 5 and the connecting pipe part 502.

[0041] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A gas pipeline anti-corrosion joint structure, comprising a main pipeline connection part (1), characterized in that... : The main pipe connection part (1) is provided with a groove (2) on the outside, and a protective layer (201) is provided inside the groove (2). The protective layer (201) extends toward the opening of the main pipe connection part (1) and is detachably connected with a fixing part (5). A straight pipe clamp (6) is threadedly connected to the outside of the fixing part (5). The main pipe connection (1) and the outer side of the protective layer (201) are fitted with heat shrink tubing (3), and the outer side of the heat shrink tubing (3) is provided with hose clamp (4) for pressing and fixing the protective layer (201).

2. The gas pipeline anti-corrosion joint structure according to claim 1, characterized in that: The main pipe connection (1) has a larger cross-section near its opening and is connected by a "V" shaped structure. The protective layer (201) extends from the small cross-section of the main pipe connection (1) to the large cross-section. The protective layer (201) is made of a modified polymer material with elasticity to adapt to the deformation of the "V" shaped transition section of the main pipe connection (1) and maintain sealing performance.

3. The gas pipeline anti-corrosion joint structure according to claim 2, characterized in that: The groove (2) has a concave-convex structure, and the inner wall of the protective layer (201) is provided with a protruding structure that is adapted to the groove (2), and it is interference-fitted with the groove (2) in the installed state.

4. The gas pipeline anti-corrosion joint structure according to claim 3, characterized in that: The inner wall of the protective layer (201) is supported by the main pipe connection part (1), and the "V"-shaped transition section of the main pipe connection part (1) has a smooth inclined structure.

5. The gas pipeline anti-corrosion joint structure according to claim 1, characterized in that: The opening of the protective layer (201) extends to the outside of the opening of the main pipe connection part (1) and is connected with a connecting collar (202). The fixing part (5) includes a connecting pipe part (502) with a pipe body structure.

6. The gas pipeline anti-corrosion joint structure according to claim 5, characterized in that: The connecting pipe section (502) is provided with a connecting flange (503) on the side facing the connecting collar (202), and the connecting collar (202) is bolted to the connecting flange (503).

7. The gas pipeline anti-corrosion joint structure according to claim 6, characterized in that: The outer side of the connecting pipe (502) is provided with multiple ribs extending along its axial direction.

8. The gas pipeline anti-corrosion joint structure according to claim 7, characterized in that: The fixing part (5) is threadedly connected to the connecting pipe part (502).

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