Flame-retardant high-temperature-resistant CNG (compressed natural gas) steel pipe

Abstract

The utility model relates to the technical field of natural gas transportation, and discloses a flame-retardant and high-temperature-resistant steel pipe for CNG (compressed natural gas), which comprises a steel pipe mechanism, a protective coating is coated on the peripheral surface of the steel pipe mechanism and comprises flame-retardant paint and high-temperature-resistant paint, the high-temperature-resistant paint is uniformly coated on the peripheral surface of the steel pipe mechanism, and the flame-retardant paint is coated on the peripheral surface of the steel pipe mechanism. And the flame-retardant coating is uniformly coated on the high-temperature-resistant coating. According to the flame-retardant and high-temperature-resistant steel pipe for the CNG, the protective coating and the steel pipe mechanism are arranged, so that the problem that when an existing steel pipe for the CNG is produced, although the steel pipe is made of a certain flame-retardant material, the steel pipe for transporting the CNG is exposed to the outside throughout the year is solved; the flame-retardant and high-temperature-resistant performance is gradually reduced as time goes on; the problems that when an existing flame-retardant and high-temperature-resistant steel pipe for CNG is used for connection, two pipelines can be connected through a connecting piece, a bolt and a sealing gasket, related tools need to be used, and inconvenience is caused are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas transportation, in particular to a flame retardant and high temperature resistant steel pipe for CNG. Background Art

[0002] CNG is the abbreviation of Compressed Natural Gas, which means compressed natural gas. It is a form of fuel that compresses natural gas to a high pressure state (usually 200-250bar) for easy storage and transportation. CNG is mainly used to replace gasoline or diesel as automobile fuel to reduce dependence on oil and reduce exhaust emissions. CNG vehicles are usually equipped with special compressed natural gas storage tanks and fuel systems, and can be refueled at gas stations or gas stations. As a clean energy, CNG has lower carbon dioxide emissions and fewer air pollutants, so it has been widely used in some countries and regions. When transporting compressed natural gas, relevant steel pipes are required, but it still has the following disadvantages in actual use:

[0003] At present, the existing CNG steel pipes, during production, although the materials themselves use materials with certain flame retardancy, but because the steel pipes for transporting compressed natural gas are exposed to the outside world all year round, the flame retardancy and high temperature resistance will gradually decrease with the passage of time, and there are certain limitations in their use; or the existing flame retardant and high temperature resistant CNG steel pipes, when connecting, still need to use connectors, bolts and sealing gaskets to connect the two pipes, and need to use related tools, which is quite inconvenient. Therefore, it is necessary to improve a flame retardant and high temperature resistant CNG steel pipe to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a flame retardant and high temperature resistant CNG steel pipe to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flame-retardant and high-temperature resistant CNG steel pipe, comprising a steel pipe structure, the peripheral surface of which is coated with a protective coating, and the protective coating comprises a flame-retardant coating and a high-temperature resistant coating, the high-temperature resistant coating is evenly coated on the peripheral surface of the steel pipe structure, and the flame-retardant coating is evenly coated on the high-temperature resistant coating.

[0006] Preferably, the steel pipe structure includes a first steel pipe and a second steel pipe, and the second steel pipe is threadedly connected to one end of the first steel pipe.

[0007] Preferably, a threaded head is fixedly connected to the middle of the two end surfaces of the first steel pipe, and a threaded groove is provided in the middle of the two end surfaces of the second steel pipe.

[0008] Preferably, the thread head is threadedly connected in the thread groove, and the total number of the thread head and the thread groove is two.

[0009] Preferably, the flame retardant coating comprises epoxy resin coating, non-expanding coating and powder coating, and the epoxy resin coating, non-expanding coating and powder coating are uniformly mixed.

[0010] Preferably, the high temperature resistant coating comprises zinc silicate coating, aluminum oxide coating and tungstate coating, and the zinc silicate coating, aluminum oxide coating and tungstate coating are uniformly mixed.

[0011] Preferably, the steel pipe structure includes stainless steel, nickel-based alloy and alloy steel components, and the stainless steel, nickel-based alloy and alloy steel components are uniformly mixed.

[0012] Compared with the prior art, the utility model provides a flame retardant and high temperature resistant CNG steel pipe, which has the following beneficial effects:

[0013] 1. This flame-retardant and high-temperature resistant CNG steel pipe has the effect of increasing the service life of the compressed natural gas steel pipe by setting a protective coating, which solves the problem that the existing CNG steel pipe uses a material with certain flame-retardant materials during production, but because the steel pipe for transporting compressed natural gas is exposed to the outside world all year round, its flame-retardant and high-temperature resistant properties will gradually decrease with the passage of time, and there are certain limitations in its use.

[0014] 2. This flame-retardant and high-temperature resistant CNG steel pipe has the effect of facilitating and quickly sealing the connection between steel pipes through the set steel pipe mechanism, which solves the problem that the existing flame-retardant and high-temperature resistant CNG steel pipes need to use connectors, bolts and sealing gaskets to connect the two pipes during connection, and need to use relevant tools, which is relatively inconvenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor:

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

[0017] Figure 2 This is a schematic diagram of the steel pipe structure of the utility model;

[0018] Figure 3This is a schematic diagram of the component structure of the steel pipe mechanism of the utility model;

[0019] Figure 4 This is a schematic diagram of the protective coating structure of the utility model;

[0020] Figure 5 It is a schematic diagram of the components of the flame retardant coating and the high temperature resistant coating of the utility model.

[0021] In the figure: 1. steel pipe structure; 11. first steel pipe; 12. second steel pipe; 121. thread groove; 13. thread head; 14. stainless steel; 15. nickel-based alloy; 16. alloy steel; 2. protective coating; 21. flame retardant coating; 211. epoxy resin coating; 212. non-expanding coating; 213. powder coating; 22. high temperature resistant coating; 221. zinc silicate coating; 222. alumina coating; 223. tungstate coating. DETAILED DESCRIPTION

[0022] 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.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Example:

[0025] See also Figure 1-4The utility model provides a technical solution: a flame-retardant and high-temperature resistant CNG steel pipe, comprising a steel pipe structure 1, the peripheral surface of the steel pipe structure 1 is coated with a protective coating 2, and the protective coating 2 includes a flame-retardant coating 21 and a high-temperature resistant coating 22, the high-temperature resistant coating 22 is evenly coated on the peripheral surface of the steel pipe structure 1, and the flame-retardant coating 21 is evenly coated on the high-temperature resistant coating 22; the steel pipe structure 1 comprises a first steel pipe 11 and a second steel pipe 12, and the second steel pipe 12 is threadedly connected to one end of the first steel pipe 11; a thread head 13 is fixedly connected to the middle of the two end surfaces of the first steel pipe 11, and a thread groove 121 is provided in the middle of the two end surfaces of the second steel pipe 12; the thread head 13 is threadedly connected to the thread groove 12 1, and the total number of thread heads 13 and thread grooves 121 are both two; the flame retardant coating 21 includes epoxy resin coating 211, non-expanding coating 212 and powder coating 213, and the epoxy resin coating 211, non-expanding coating 212 and powder coating 213 are uniformly mixed; the high temperature resistant coating 22 includes zinc silicate coating 221, aluminum oxide coating 222 and tungstate coating 223, and the zinc silicate coating 221, aluminum oxide coating 222 and tungstate coating 223 are uniformly mixed; the steel pipe structure 1 includes stainless steel 14, nickel-based alloy 15 and alloy steel 16 components, and the stainless steel 14, nickel-based alloy 15 and alloy steel 16 components are uniformly mixed.

[0026] Working principle: When the compressed natural gas steel pipe is connected, first align the thread head 13 on the first steel pipe 11 with the thread groove 121 on the second steel pipe 12, then fix the first steel pipe 11 or the second steel pipe 12, and rotate the second steel pipe 12 or the first steel pipe 11 clockwise to quickly connect multiple first steel pipes 11 and second steel pipes 12. Since the thread head 13 is threadedly connected in the thread groove 121, it can effectively avoid the occurrence of gas leakage due to gaps in the steel pipe connection, and compared with the connection between steel pipes, the , bolts and sealing rings with related tools to make a sealed connection, which is relatively convenient, and the flame retardant coating 21 is obtained by mixing epoxy resin coating 211, non-expanding coating 212 and powder coating 213 with flame retardant effects and coating them on the outside of the high temperature resistant coating 22, thereby increasing the flame retardant properties of the steel pipe. Similarly, the surface of the steel pipe is evenly coated with a coating with good high temperature resistant performance composed of a mixture of zinc silicate coating 221, aluminum oxide coating 222 and tungstate coating 223, which can effectively improve the high temperature resistance of the steel pipe.

[0027] 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 statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A flame retardant and high temperature resistant CNG steel pipe, characterized in that: The invention comprises a steel pipe structure (1), wherein the peripheral surface of the steel pipe structure (1) is coated with a protective coating (2), and the protective coating (2) comprises a flame retardant coating (21) and a high temperature resistant coating (22), wherein the high temperature resistant coating (22) is evenly coated on the peripheral surface of the steel pipe structure (1), and the flame retardant coating (21) is evenly coated on the high temperature resistant coating (22).

2. The flame retardant and high temperature resistant CNG steel pipe according to claim 1, characterized in that: The steel pipe structure (1) comprises a first steel pipe (11) and a second steel pipe (12), and the second steel pipe (12) is threadedly connected to one end of the first steel pipe (11).

3. The flame retardant and high temperature resistant CNG steel pipe according to claim 2, characterized in that: A thread head (13) is fixedly connected in the middle of the surfaces at both ends of the first steel pipe (11), and a thread groove (121) is provided in the middle of the surfaces at both ends of the second steel pipe (12).

4. The flame retardant and high temperature resistant CNG steel pipe according to claim 3, characterized in that: The thread head (13) is threadedly connected in the thread groove (121), and the total number of the thread head (13) and the thread groove (121) is two.

5. The flame retardant and high temperature resistant CNG steel pipe according to claim 1, characterized in that: The flame retardant coating (21) comprises an epoxy resin coating (211), a non-expanding coating (212) and a powder coating (213), and the epoxy resin coating (211), the non-expanding coating (212) and the powder coating (213) are uniformly mixed.

6. The flame retardant and high temperature resistant CNG steel pipe according to claim 1, characterized in that: The high temperature resistant coating (22) comprises zinc silicate coating (221), aluminum oxide coating (222) and tungstate coating (223), and the zinc silicate coating (221), aluminum oxide coating (222) and tungstate coating (223) are uniformly mixed.

7. The flame retardant and high temperature resistant CNG steel pipe according to claim 1, characterized in that: The steel pipe structure (1) comprises stainless steel (14), nickel-based alloy (15) and alloy steel (16), and the stainless steel (14), nickel-based alloy (15) and alloy steel (16) are uniformly mixed.

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