Anti-corrosion gas pipeline

Abstract

The utility model belongs to the field of gas pipelines, and particularly relates to an anti-corrosion gas pipeline which comprises a pipeline body and an internal assembly. The inner assembly is provided with an inner pipeline, the periphery of the inner pipeline is sleeved with corrugated rubber, the inner pipeline is internally provided with a metal pipe, the periphery of the metal pipe is provided with a bottom layer, the periphery of the bottom layer is provided with a middle layer, and the periphery of the middle layer is provided with an outer layer; the inner pipeline is sleeved with the corrugated rubber, so that good electric insulation performance is achieved, the influence of external current on the inner pipeline is prevented, when the corrugated rubber is collided by external force in the using process, certain force buffering is formed on the interior through the specific ductility of the corrugated rubber, damage to the interior is reduced, and the anti-collision and insulation functions are achieved; the problem that no enough countermeasures exist under the condition that the current interferes with the pipeline is solved, and the comprehensiveness in use is improved.

Description

Technical Field

[0001] The utility model relates to the field of gas pipelines, in particular to an anti-corrosion gas pipeline. Background Art

[0002] Gas pipeline refers to the pipeline for transporting natural gas, which is usually buried underground or exposed to the environment. It is easily corroded and oxidized by underground moisture and various chemicals, which reduces the service life of the gas pipeline. In order to increase the service life of the gas pipeline, reduce the replacement frequency and improve safety performance, it is necessary to install an anti-corrosion device on the outside of the gas pipeline.

[0003] Chinese patent number CN202320029217.X discloses a novel anti-corrosion gas pipeline, comprising a gas pipeline body, the periphery of the gas pipeline body is provided with a bottom coating, the periphery of the bottom coating is provided with an intermediate layer, and the periphery of the intermediate layer is provided with an outer layer.

[0004] From the above, it can be seen that the use of room temperature vulcanized rubber coating exhibits the elasticity of rubber and has the characteristics of high hardness, which can completely solve the problem of paint cracking caused by the inconsistency between the shrinkage ratio of the paint and the metal pipe. However, this case still has the following shortcomings: there is no certain insulation and other protective properties during use, and there are no sufficient response measures when electric current interferes with the pipeline. At the same time, the impact resistance performance cannot reduce the impact force on the internal pipeline.

[0005] Therefore, in view of the above problems, an anti-corrosion gas pipeline is proposed. Utility Model Content

[0006] In order to make up for the shortcomings of the prior art and the problem that there are no adequate countermeasures when current interferes with the pipeline, the utility model proposes an anti-corrosion gas pipeline.

[0007] The technical solution adopted by the utility model to solve its technical problem is: the anti-corrosion gas pipeline described in the utility model includes a pipeline body and an internal component; the internal component is installed with an inner pipeline, the inner pipeline is sheathed with corrugated rubber all around, a metal pipe is installed inside the inner pipeline, a bottom layer is arranged on the periphery of the metal pipe, an intermediate layer is arranged on the periphery of the bottom layer, and an outer layer is arranged on the periphery of the intermediate layer.

[0008] Preferably, the pipeline body is installed with a protection tube, connecting flanges are fixedly installed at both ends of the protection tube, and the inner wall of the protection tube is sleeved with corrugated rubber.

[0009] Preferably, the material of the bottom layer is an inorganic zinc-rich material.

[0010] Preferably, the material of the middle layer is epoxy coal tar material.

[0011] Preferably, the outer layer is made of glass cloth.

[0012] The utility model is beneficial in that:

[0013] 1. The utility model has better electrical insulation performance through the structural design of internal components and the sleeve of corrugated rubber on the inner pipe, which prevents the influence of external current on the inner pipe. When it is hit by external force during use, the unique ductility of corrugated rubber forms a certain force buffer on the inside, reduces the damage to the inside, realizes the function of anti-collision insulation, solves the problem of insufficient countermeasures in the case of current interference with the pipeline, and improves the comprehensiveness in use;

[0014] 2. Through the structural design of the internal components of the utility model, the bottom layer has good adhesion during use, and the middle layer has good waterproofness and chemical stability. That is, the anti-corrosion layer is immersed in the electrolyte solution for a long time without chemical decomposition and failure or production of substances that cause corrosion of the pipeline. The outer layer has good electrical insulation performance, sufficient electrical strength and resistivity, and realizes the function of corrosion-resistant insulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of an exploded cross-section of the overall structure of the utility model;

[0018] Figure 3 For the utility model Figure 2 A schematic diagram of the structure enlargement in the middle;

[0019] In the figure: 1. Pipe body; 2. Internal components; 11. Protective pipe; 12. Connecting flange; 21. Inner pipe; 22. Corrugated rubber; 23. Metal pipe; 24. Bottom layer; 25. Middle layer; 26. Outer layer. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 3 As shown, an anti-corrosion gas pipeline includes a pipeline body 1 and an internal component 2; the internal component 2 is installed with an inner pipeline 21, the inner pipeline 21 is sheathed with corrugated rubber 22, a metal pipe 23 is installed inside the inner pipeline 21, a bottom layer 24 is arranged around the metal pipe 23, an intermediate layer 25 is arranged around the bottom layer 24, and an outer layer 26 is arranged around the intermediate layer 25;

[0022] During operation, the corrugated rubber 22 is sheathed on the inner pipe 21 . In addition to having good physical and mechanical properties of rubber, there should not be a large amount of freely movable electric charges in the body, that is, it has good electrical insulation properties, which is beneficial to prevent the influence of external current on the inner pipe 21 .

[0023] Furthermore, the pipeline body 1 is installed with a protection pipe 11, and connecting flanges 12 are fixedly installed at both ends of the protection pipe 11, and the inner wall of the protection pipe 11 is sleeved with corrugated rubber 22;

[0024] During operation, the protection tube 11 is used to protect the exterior, and when impacted, the corrugated rubber 22 has a unique ductility to buffer the interior to a certain extent, thereby reducing damage to the interior caused by external forces.

[0025] Furthermore, the material of the bottom layer 24 is an inorganic zinc-rich material;

[0026] During operation, the inorganic zinc-rich coating has a self-repairing effect. When a part of the coating is damaged, the base metal of the metal tube 23 is exposed. In a smaller area, the corrosion current can flow to the exposed part of the steel, and the zinc product is deposited there to form a protective film, delaying the corrosion from continuing.

[0027] Furthermore, the material of the middle layer 25 is epoxy coal tar material;

[0028] When working, epoxy coal tar paint has the advantages of excellent water resistance and anti-corrosion performance of coal tar asphalt and good adhesion, tough paint film, high mechanical strength and good chemical corrosion resistance of epoxy resin paint.

[0029] Furthermore, the material of the outer layer 26 is glass cloth;

[0030] When working, glass fiber is an inorganic non-metallic material with excellent performance. It comes in many types. Its advantages are good insulation, strong heat resistance, good corrosion resistance and high mechanical strength, but its disadvantages are brittleness and poor wear resistance. It is often used as a reinforcing material in composite materials, electrical insulation materials and thermal insulation materials.

[0031] Working principle: The bottom layer 24 contains a large amount of zinc powder, which is protected by sacrificing zinc powder. The zinc particles and the surface of the metal tube 23 are in close contact. The zinc potential is more negative than that of the metal tube 23, so zinc atoms in the electrolyte solution easily lose electrons and become anodes, and the metal tube 23 is the cathode. In the anode area, zinc is corroded due to the loss of electrons, and in the cathode area, the steel surface continuously gains electrons, thereby being protected. The middle layer 25 is a high-performance anti-corrosion coating, which is smooth, dense, hard, and has strong adhesion. It is resistant to salt and alkali, seawater, soil microbial corrosion, and plant root penetration. The outer layer 26 is a fabric woven from glass fiber, which has the properties of insulation, heat insulation, corrosion resistance, non-combustion, high temperature resistance, high strength, low moisture absorption, softness, and high tensile strength. When it is collided by external force during use, the corrugated rubber 22 will buffer the force point, improve the overall stability, resist impact and collision, and avoid the occurrence of cracks in the external coating caused by extrusion of the metal tube 23. At the same time, it has the advantages of good electrical insulation performance and sufficient electrical strength and resistivity.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An anti-corrosion gas pipeline, characterized in that: The invention comprises a pipe body (1) and an internal component (2); the internal component (2) is provided with an inner pipe (21), the inner pipe (21) is sheathed with corrugated rubber (22) on all sides, a metal pipe (23) is provided inside the inner pipe (21), a bottom layer (24) is provided on the periphery of the metal pipe (23), an intermediate layer (25) is provided on the periphery of the bottom layer (24), and an outer layer (26) is provided on the periphery of the intermediate layer (25).

2. The anti-corrosion gas pipeline according to claim 1, characterized in that: The pipeline body (1) is installed with a protection pipe (11), connecting flanges (12) are fixedly installed at both ends of the protection pipe (11), and the inner wall of the protection pipe (11) is sleeved with corrugated rubber (22).

3. The anti-corrosion gas pipeline according to claim 1, characterized in that: The material of the bottom layer (24) is an inorganic zinc-rich material.

4. The anti-corrosion gas pipeline according to claim 1, characterized in that: The material of the intermediate layer (25) is epoxy coal tar material.

5. The anti-corrosion gas pipeline according to claim 1, characterized in that: The outer layer (26) is made of glass cloth.

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