Leakage-proof heat preservation structure of natural gas pipeline

Abstract

The utility model relates to the technical field of natural gas pipelines, in particular to a leakage-proof heat preservation structure of a natural gas pipeline, which comprises a protective sleeve, two sections of pipeline bodies are fixedly mounted in the protective sleeve, and a protective mechanism is arranged in the protective sleeve. According to the natural gas pipeline anti-leakage heat preservation structure, a protection mechanism is arranged in a protection sleeve, an anti-collision net frame is installed on the inner wall of the protection sleeve, when the natural gas pipeline anti-leakage heat preservation structure is collided and impacted, the surface of the anti-collision net frame deforms, and a damping rod slides in a fixing base; under the action of the elastic force of the spring, the anti-collision net rack can be prevented from continuously deforming, so that the structure of the pipeline body and the protection sleeve can be well prevented from being damaged, and the problems that when an existing natural gas pipeline is collided and impacted, the pipeline is damaged, so that natural gas leaks, the heat preservation performance of the pipeline connecting position is reduced, and natural gas conveying is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas pipelines, in particular to a leakage-proof thermal insulation structure for natural gas pipelines. Background Art

[0002] Natural gas refers to a mixture of hydrocarbons and non-hydrocarbon gases naturally stored in strata. In petroleum geology, it usually refers to oilfield gas and gasfield gas, which is mainly composed of hydrocarbons and contains non-hydrocarbon gases. Natural gas is stored in underground porous rock formations, including oilfield gas, gasfield gas, coalbed methane, mud volcano gas and biogenic gas, etc., and a small amount also comes from coal seams. It is a high-quality fuel and chemical raw material. The main use of natural gas is as fuel. It can be used to manufacture carbon black, chemicals and liquefied petroleum gas. Propane and butane produced from natural gas are important raw materials for modern industry.

[0003] However, the connections between existing natural gas pipelines are mostly fixed by flange connection, and then a sealing gasket is placed between the flanges to achieve a sealing effect. Since the sealing gasket will be damaged and degraded due to external erosion, the airtightness of the pipeline cannot be guaranteed. In addition, the traditional natural gas connection flange is exposed to the outside world. If the pipeline is hit by a collision, the flange will be offset, resulting in natural gas leakage, reducing the thermal insulation performance of the pipeline connection, affecting the transportation of natural gas, and failing to meet social needs. Therefore, a natural gas pipeline anti-leakage insulation structure is proposed to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a natural gas pipeline leakage prevention and insulation structure, which has the advantages of preventing leakage and insulating pipeline connection points. It solves the problem that the connecting flanges between existing natural gas pipelines cannot ensure the airtightness of the pipelines and the pipelines are damaged when subjected to collision and impact, resulting in natural gas leakage, reducing the insulation performance of the pipeline connections and affecting the natural gas transportation.

[0005] In order to achieve the above-mentioned purpose of preventing leakage and heat preservation of pipeline connection points, the utility model provides the following technical solutions: a natural gas pipeline anti-leakage heat preservation structure, including a protective sleeve, two sections of pipeline bodies are fixedly installed inside the protective sleeve, and a protective mechanism is arranged inside the protective sleeve;

[0006] The protection mechanism includes a sealing ring, a pair of sealing rings are fixedly installed at the top end of the inner wall of the protection sleeve, an anti-collision grid is fixedly installed on the inner wall of the protection sleeve, four pairs of shock-absorbing rods are fixedly installed on the surface of the anti-collision grid, a limit plate is fixedly installed at the top end of the shock-absorbing rod, a spring is fixedly connected to the top of the limit plate, a fixed sleeve is fixedly installed inside the protection sleeve, a fixed seat is fixedly installed on the surface of the fixed sleeve, a filling port is opened on the inner wall of the protection sleeve, a filling cover is fixedly installed on the inner wall of the filling port, a filling cavity is opened inside the protection sleeve, the interior of the filling cavity is filled with polyurethane gel, a sealed box is fixedly installed inside the protection sleeve, a heat-insulating cavity is opened on the inner wall of the sealed box, the interior of the heat-insulating cavity is filled with polystyrene, an airtight plate is fixedly installed on the inner wall of the sealed box, and a fixing plate is fixedly installed at the top end of the pipeline body.

[0007] Furthermore, the pipe body is fixedly installed inside the protective sleeve by coaxial positioning.

[0008] Furthermore, the fixing sleeve is fixedly installed on the outside of the filling cavity.

[0009] Furthermore, the spring is fixedly connected to the inside of the fixing seat, and the shock absorbing rod is slidably installed in the inside of the fixing seat.

[0010] Furthermore, the filling cap is fixedly mounted on the surface of the protective sleeve by means of threads.

[0011] Furthermore, the fixing plate is fixedly mounted on the inner wall of the closed box, and the pipeline body is fixedly connected to the surface of the closed box.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] 1. The natural gas pipeline anti-leakage insulation structure is provided with a protection mechanism inside the protective casing. After the pipeline body is fixed in the closed box, polystyrene has good thermal insulation properties. By wrapping the polystyrene on the inner wall of the closed box, the temperature inside the closed box can be kept constant. Moreover, since the polyurethane gel has good air tightness and fluidity, the polyurethane gel is filled inside the filling cavity, and the fine joint between the pipeline body and the closed box can be filled, thereby ensuring the air tightness of the pipeline, solving the problem that the connecting flanges between existing natural gas pipelines cannot ensure the air tightness of the pipeline.

[0014] 2. The natural gas pipeline anti-leakage and heat-insulating structure is provided with a protection mechanism inside the protective casing, and an anti-collision grid is installed on the inner wall of the protective casing. When subjected to collision impact, the surface of the anti-collision grid is deformed, and the shock-absorbing rod slides inside the fixed seat. Under the elastic force of the spring, the anti-collision grid is prevented from continuing to deform, thereby ensuring that the structure of the pipeline body and the protective casing is not damaged, solving the problem that the existing natural gas pipeline is damaged when subjected to collision impact, causing natural gas leakage, reducing the heat preservation performance of the pipeline connection, and affecting the transportation of natural gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the protection mechanism of the utility model;

[0017] Figure 3 It is a structural sectional view of the protection mechanism of the utility model.

[0018] In the figure: 1. protective sleeve; 2. pipeline body; 3. protective mechanism; 301. sealing ring; 302. anti-collision grid; 303. shock-absorbing rod; 304. limit plate; 305. spring; 306. fixing sleeve; 307. fixing seat; 308. filling port; 309. filling cover; 310. filling cavity; 311. polyurethane gel; 312. sealed box; 313. insulation cavity; 314. polystyrene; 315. airtight plate; 316. fixing plate. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-3 In this embodiment, a natural gas pipeline anti-leakage insulation structure includes a protective sleeve 1, a pipeline body 2 of two sections is fixedly installed inside the protective sleeve 1, and a protective mechanism 3 is arranged inside the protective sleeve 1;

[0021] The protection mechanism 3 includes a sealing ring 301. A pair of sealing rings 301 are fixedly installed at the top of the inner wall of the protection sleeve 1. The sealing ring 301 ensures that natural gas will not flow from the surface of the pipeline body 2 to the outside. An anti-collision grid 302 is fixedly installed on the inner wall of the protection sleeve 1. The anti-collision grid 302 ensures that the internal structure of the protection sleeve 1 will not be damaged by collision. Four pairs of shock-absorbing rods 303 are fixedly installed on the surface of the anti-collision grid 302. The shock-absorbing rods 303 prevent the anti-collision grid 302 from deforming too much. A limit plate 304 is fixedly installed at the top of the shock-absorbing rod 303. The top of the limit plate 304 is fixedly connected with a spring 305. A fixed sleeve 306 is fixedly installed inside the protection sleeve 1. The fixed sleeve 306 mainly fixes and bears the fixed seat 307. A fixing seat 307 is fixedly installed on the surface of the fixed sleeve 306, and a filling port 308 is opened on the inner wall of the protective sleeve 1. The filling port 308 is opened mainly to facilitate the filling of polyurethane gel 311 material. A filling cover 309 is fixedly installed on the inner wall of the filling port 308. A filling cavity 310 is opened inside the protective sleeve 1. The interior of the filling cavity 310 is filled with polyurethane gel 311. The polyurethane gel 311 has good airtightness. A sealed box 312 is fixedly installed inside the protective sleeve 1. A heat-insulating cavity 313 is opened on the inner wall of the sealed box 312. The interior of the heat-insulating cavity 313 is filled with polystyrene 314. The polystyrene 314 has good heat-insulating properties. An airtight plate 315 is fixedly installed on the inner wall of the sealed box 312, and a fixing plate 316 is fixedly installed at the top of the pipe body 2.

[0022] In summary, the natural gas pipeline leakage prevention and insulation structure is provided with a protection mechanism 3 inside the protective sleeve 1. After the pipeline body 2 is fixed in the sealed box 312, since the polystyrene 314 has good thermal insulation properties, the polystyrene 314 is wrapped on the inner wall of the sealed box 312 to ensure that the temperature inside the sealed box 312 is constant. Since the polyurethane gel 311 has good air tightness and fluidity, the polyurethane gel 311 is filled in the filling cavity 310 to fill the fine connection between the pipeline body 2 and the sealed box 312, thereby ensuring the air tightness of the pipeline, which solves the problem that the connecting flanges between existing natural gas pipelines cannot ensure the air tightness of the pipeline.

[0023] In addition, a protection mechanism 3 is provided inside the protective sleeve 1, and an anti-collision grid 302 is installed on the inner wall of the protective sleeve 1. When subjected to a collision impact, the surface of the anti-collision grid 302 is deformed, and the shock-absorbing rod 303 slides inside the fixing seat 307. Under the elastic force of the spring 305, the anti-collision grid 302 is prevented from continuing to deform, thereby ensuring that the structure of the pipeline body 2 and the protective sleeve 1 is not damaged, thereby solving the problem that when the existing natural gas pipeline is subjected to a collision impact, the pipeline is damaged, resulting in natural gas leakage, reducing the thermal insulation performance of the pipeline connection, and affecting the transportation of natural gas.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A natural gas pipeline anti-leakage insulation structure, comprising a protective sleeve (1), characterized in that: Two sections of pipeline bodies (2) are fixedly installed inside the protective sleeve (1), and a protection mechanism (3) is arranged inside the protective sleeve (1); The protection mechanism (3) comprises a sealing ring (301), a pair of sealing rings (301) are fixedly mounted at the top of the inner wall of the protection sleeve (1), an anti-collision grid (302) is fixedly mounted on the inner wall of the protection sleeve (1), four pairs of shock absorbing rods (303) are fixedly mounted on the surface of the anti-collision grid (302), a limiting plate (304) is fixedly mounted at the top of the shock absorbing rod (303), a spring (305) is fixedly connected to the top of the limiting plate (304), a fixing sleeve (306) is fixedly mounted inside the protection sleeve (1), a fixing seat (307) is fixedly mounted on the surface of the fixing sleeve (306), and the protection sleeve The inner wall of the tube (1) is provided with a filling port (308), and a filling cap (309) is fixedly installed on the inner wall of the filling port (308); a filling cavity (310) is provided inside the protective sleeve (1), and the interior of the filling cavity (310) is filled with polyurethane gel (311); a sealed box (312) is fixedly installed inside the protective sleeve (1); a heat preservation cavity (313) is provided on the inner wall of the sealed box (312), and the interior of the heat preservation cavity (313) is filled with polystyrene (314); an airtight plate (315) is fixedly installed on the inner wall of the sealed box (312); and a fixing plate (316) is fixedly installed at the top end of the pipeline body (2).

2. A natural gas pipeline anti-leakage insulation structure according to claim 1, characterized in that: The pipe body (2) is fixedly installed inside the protective sleeve (1) by coaxial positioning.

3. A natural gas pipeline anti-leakage insulation structure according to claim 1, characterized in that: The fixing sleeve (306) is fixedly mounted on the outside of the filling cavity (310).

4. A natural gas pipeline leakage prevention and insulation structure according to claim 1, characterized in that: The spring (305) is fixedly connected to the inside of the fixing seat (307), and the shock absorbing rod (303) is slidably installed inside the fixing seat (307).

5. The natural gas pipeline anti-leakage insulation structure according to claim 1 is characterized by: The filling cap (309) is fixedly mounted on the surface of the protective sleeve (1) by means of threads.

6. A natural gas pipeline leakage prevention and thermal insulation structure according to claim 1, characterized in that: The fixing plate (316) is fixedly mounted on the inner wall of the sealed box (312), and the pipe body (2) is fixedly connected to the surface of the sealed box (312).

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