A nut specially used for petrochemical industry

Abstract

The utility model relates to the field of petrochemical technology, and discloses a special nut for petrochemical industry, including an anti-corrosion nut, a front side of the anti-corrosion nut is fixedly installed with an anti-loosening spring, the anti-corrosion nut includes a nut body, and the outer wall of the nut body is fixedly installed with a first anti-corrosion and wear-resistant coating. By setting the anti-corrosion nut, the nut body on the anti-corrosion nut has excellent tensile strength, yield strength and good corrosion resistance, and can maintain stable performance for a long time in a petrochemical environment. The first anti-corrosion and wear-resistant coating on the anti-corrosion nut can effectively isolate the contact between the corrosive medium and the nut body, has excellent chemical corrosion resistance, and can resist the erosion of corrosive substances such as acids, alkalis, salts, etc. commonly found in the petrochemical environment. The nut body and the first anti-corrosion and wear-resistant coating jointly enhance the corrosion resistance and service life of the special nut for petrochemical industry, and provide reliable guarantee for the stable operation of petrochemical equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical industry, in particular to a nut special for petrochemical industry. Background Art

[0002] The petrochemical industry is a pillar industry in my country. It mainly processes and sells crude oil and natural gas. For example, it is processed into diesel, kerosene, gasoline, asphalt, paraffin, sulfur (a byproduct of natural gas), plastics, rubber, fiber, chemicals, etc. The petrochemical industry has long production lines and covers a wide range of areas. Sinopec Group alone has nearly 6,000 km of crude oil, refined oil, natural gas and other oil and gas pipelines, 24,000 gas stations, and petrochemical companies' oil fields, oil production plants, refineries, chemical plants, oil depots, gas stations, and oil (gas) pipelines throughout the country's cities, towns, stations, docks, hotels, and thousands of households. In the petrochemical industry, a large number of nuts are needed to connect equipment and pipelines.

[0003] However, the high temperature, high pressure and highly corrosive working environment of the petrochemical industry can easily cause rapid corrosion of traditional nuts, making them unable to play the role of fastening connections, resulting in their inability to adapt to the special working environment of the petrochemical industry. Their service life and use effect are greatly reduced, making the operation of petrochemical industry equipment have certain safety hazards.

[0004] For this reason, we propose a nut specially used in petrochemical industry. Utility Model Content

[0005] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a nut special for petrochemical industry.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a petrochemical-specific nut, including an anti-corrosion nut, a front side of the anti-corrosion nut is fixedly installed with an anti-loosening spring, the anti-corrosion nut includes a nut body, an outer wall of the nut body is fixedly installed with a first anti-corrosion and wear-resistant coating, an inner wall of the nut body is fixedly installed with a second anti-corrosion and wear-resistant coating, the anti-loosening spring includes a spring body, and the back side of the spring body is fixedly connected to the front side of the anti-corrosion nut, the outer wall of the spring body is fixedly installed with an anti-corrosion coating, and the outer wall of the anti-corrosion coating is fixedly installed with a wear-resistant coating.

[0007] Preferably, the nut body is made of high-strength alloy steel, which has excellent tensile strength, yield strength and good corrosion resistance, and can maintain stable performance for a long time in a petrochemical environment.

[0008] Preferably, the first anti-corrosion and wear-resistant coating includes a metal pretreatment base layer, an anti-corrosion polymer barrier layer and a polymer wear-resistant topcoat layer. The metal pretreatment base layer adopts a special metal pretreatment agent to clean and activate the surface of the nut body, enhance the adhesion between the coating and the substrate, ensure that the coating can be evenly and stably adhered to the surface of the nut body, and prevent the coating from falling off or peeling off. The anti-corrosion polymer barrier layer is a coating composed of a polymer and a special anti-corrosion coating, which can effectively isolate the contact between the corrosive medium and the nut body, has excellent chemical corrosion resistance, and can resist the erosion of corrosive substances such as acids, alkalis, salts, etc. commonly found in petrochemical environments. The polymer wear-resistant topcoat layer is made of a polymer material with excellent wear resistance and weather resistance, which can resist ultraviolet rays, high temperature and humidity in petrochemical environments, and maintain the beauty and gloss of the overall nut surface.

[0009] Preferably, the material of the second anti-corrosion and wear-resistant coating is an oxide protective film. By forming a dense oxide protective film on the threaded surface of the inner wall of the nut body, the contact between the corrosive medium and the nut body can be effectively isolated, thereby enhancing the corrosion resistance of the overall nut. At the same time, the oxide protective film has good wear resistance, can resist the friction and wear caused by the threaded connection, and maintain the integrity and service life of the overall nut.

[0010] Preferably, the spring body is made of stainless steel, which has excellent corrosion resistance, high temperature strength and good elasticity, and can maintain stable performance for a long time in a petrochemical environment. The spring body can exert a certain elasticity on the nut to maintain its tightening effect and prevent the nut from loosening and falling off.

[0011] Preferably, the anti-corrosion coating is made of a special high molecular polymer with excellent chemical corrosion resistance, high temperature resistance and wear resistance. It can be tightly adhered to the surface of the spring body to form a solid protective barrier, effectively preventing the spring body from being corroded and worn by corrosive substances.

[0012] Preferably, the material of the wear-resistant coating is ceramic powder, which has extremely high hardness, good wear resistance and corrosion resistance, and can enable the anti-loosening spring to maintain stable performance for a long time in a petrochemical environment. The wear-resistant coating is evenly covered on the surface of the anti-corrosion coating through a spraying process to form a hard and smooth protective layer, which effectively resists the wear and corrosion of the spring body caused by friction and impact. At the same time, the ceramic powder also has a low friction coefficient, which can reduce the friction resistance of the nut during tightening and loosening, thereby improving the use efficiency. At the same time, the ceramic powder also has excellent insulation properties, which can effectively prevent the occurrence of electrochemical corrosion, further extending the service life of the petrochemical special nuts.

[0013] Beneficial Effects

[0014] The utility model provides a nut specially used for petrochemical industry, which has the following beneficial effects:

[0015] (1) This kind of nut for petrochemical industry is provided with an anti-corrosion nut. The nut body on the anti-corrosion nut has excellent tensile strength, yield strength and good corrosion resistance, and can maintain stable performance for a long time in a petrochemical environment. The first anti-corrosion and wear-resistant coating on the anti-corrosion nut can effectively isolate the contact between the corrosive medium and the nut body, and has excellent chemical corrosion resistance. It can resist the erosion of common corrosive substances such as acids, alkalis, and salts in the petrochemical environment. The nut body and the first anti-corrosion and wear-resistant coating jointly enhance the corrosion resistance and service life of the nut for petrochemical industry, and provide reliable guarantee for the stable operation of petrochemical equipment.

[0016] (2) This petrochemical-specific nut is provided with an anti-loosening spring. The spring body on the anti-loosening spring has excellent corrosion resistance, high temperature strength and good elasticity, and can maintain stable performance for a long time in a petrochemical environment. The spring body can exert a certain elasticity on the nut to keep it tightened, preventing the nut from loosening and falling off. The anti-corrosion coating on the anti-loosening spring has excellent chemical corrosion resistance, high temperature resistance and wear resistance, and can be tightly adhered to the surface of the spring body to form a solid protective barrier, effectively preventing the spring body from being corroded and worn by corrosive substances. The wear-resistant coating on the anti-loosening spring The wear-resistant coating has extremely high hardness, good wear resistance and corrosion resistance, which can enable the anti-loosening spring to maintain stable performance for a long time in a petrochemical environment. The wear-resistant coating is evenly covered on the surface of the anti-corrosion coating through a spraying process to form a hard and smooth protective layer, which effectively resists the wear and corrosion of the spring body caused by friction and impact. At the same time, the ceramic powder also has a low friction coefficient, which can reduce the friction resistance of the nut during tightening and loosening, and improve the use efficiency. At the same time, the ceramic powder also has excellent insulation properties, which can effectively prevent the occurrence of electrochemical corrosion and further extend the service life of the petrochemical special nuts.

[0017] (3) The petrochemical-specific nut is provided with a first anti-corrosion and wear-resistant coating. The metal pretreatment bottom layer on the first anti-corrosion and wear-resistant coating adopts a special metal pretreatment agent to clean and activate the surface of the nut body, thereby enhancing the adhesion between the coating and the substrate, ensuring that the coating can be evenly and stably attached to the surface of the nut body, and preventing the coating from falling off or peeling off. The polymer wear-resistant topcoat layer on the first anti-corrosion and wear-resistant coating can resist ultraviolet rays, high temperature and humidity in the petrochemical environment, and maintain the beauty and gloss of the overall nut surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the front side of the utility model;

[0019] Figure 2 This is a cross-sectional view of the internal structure of the anti-corrosion nut of the utility model;

[0020] Figure 3 It is a cross-sectional view of the internal structure of the anti-loosening spring of the utility model.

[0021] Legend: 10. Anti-corrosion nut; 11. Anti-loosening spring; 12. Nut body; 13. First anti-corrosion and wear-resistant coating; 14. Second anti-corrosion and wear-resistant coating; 15. Spring body; 16. Anti-corrosion coating; 17. Wear-resistant coating. DETAILED DESCRIPTION

[0022] Embodiment 1: A nut for petrochemical industry, such as Figure 1 - Figure 2 As shown, it includes an anti-corrosion nut 10, a front side of the anti-corrosion nut 10 is fixedly installed with an anti-loose spring 11, the anti-corrosion nut 10 includes a nut body 12, the outer wall of the nut body 12 is fixedly installed with a first anti-corrosion wear-resistant coating 13, the inner wall of the nut body 12 is fixedly installed with a second anti-corrosion wear-resistant coating 14, and the material of the nut body 12 is high-strength alloy steel, which has excellent tensile strength, yield strength and good corrosion resistance, and can maintain stable performance for a long time in a petrochemical environment. By setting the anti-corrosion nut 10, the nut body 12 on the anti-corrosion nut 10 has excellent tensile strength, yield strength and good corrosion resistance, and can maintain stable performance for a long time in a petrochemical environment. The first anti-corrosion wear-resistant coating 13 on the anti-corrosion nut 10 can effectively isolate the contact between the corrosive medium and the nut body 12, has excellent chemical corrosion resistance, and can resist the erosion of corrosive substances such as acids, alkalis, and salts commonly found in petrochemical environments. The nut body 12 and the first anti-corrosion wear-resistant coating 13 jointly enhance the corrosion resistance and service life of the petrochemical special nut, providing a reliable guarantee for the stable operation of petrochemical equipment.

[0023] Embodiment 2: Based on Embodiment 1, Figure 2As shown, the first anti-corrosion and wear-resistant coating 13 includes a metal pretreatment base layer, an anti-corrosion polymer barrier layer and a polymer wear-resistant topcoat layer. The metal pretreatment base layer adopts a special metal pretreatment agent to clean and activate the surface of the nut body 12, enhance the adhesion between the coating and the substrate, ensure that the coating can be evenly and stably attached to the surface of the nut body 12, and prevent the coating from falling off or peeling off. The anti-corrosion polymer barrier layer is a coating composed of a polymer and a special anti-corrosion coating, which can effectively isolate the contact between the corrosive medium and the nut body 12, has excellent chemical corrosion resistance, and can resist the erosion of corrosive substances such as acids, alkalis, salts, etc. commonly found in petrochemical environments. The polymer wear-resistant topcoat layer is made of a polymer material with excellent wear resistance and weather resistance, which can resist ultraviolet rays, high temperature and humidity in petrochemical environments, and maintain the beauty and gloss of the overall nut surface. The material of the second anti-corrosion and wear-resistant coating 14 is an oxide protective film. By forming a dense oxide protective film on the threaded surface of the inner wall of the nut body 12, the contact between the corrosive medium and the nut body 12 can be effectively isolated, thereby enhancing the corrosion resistance of the overall nut. At the same time, the oxide protective film has good wear resistance and can resist the friction and wear caused by the threaded connection, maintaining the integrity and service life of the overall nut. By setting the anti-loosening spring 11, the spring body 15 on the anti-loosening spring 11 has excellent corrosion resistance, high temperature strength and good elasticity, and can maintain stable performance for a long time in a petrochemical environment. The spring body 15 can exert a certain elasticity on the nut to keep it tightened and prevent the nut from loosening and falling off. The anti-corrosion coating 16 on the anti-loosening spring 11 has excellent chemical corrosion resistance, high temperature resistance and wear resistance, and can be tightly attached to the surface of the spring body 15 to form a solid protective barrier, effectively preventing the spring body 15 from being eroded and worn by corrosive substances. The wear-resistant coating on the anti-loosening spring 11 17 has extremely high hardness, good wear resistance and corrosion resistance, which can enable the anti-loosening spring 11 to maintain stable performance for a long time in a petrochemical environment. The wear-resistant coating 17 is evenly covered on the surface of the anti-corrosion coating 16 through a spraying process to form a hard and smooth protective layer, which effectively resists the wear and corrosion of the spring body 15 caused by friction and impact. At the same time, the ceramic powder also has a low friction coefficient, which can reduce the friction resistance of the nut during tightening and loosening, and improve the use efficiency. At the same time, the ceramic powder also has excellent insulation properties, which can effectively prevent the occurrence of electrochemical corrosion and further extend the service life of the petrochemical special nut.

[0024] Embodiment 3: Based on Embodiment 1 and Embodiment 2, Figure 3As shown, the anti-loosening spring 11 includes a spring body 15, and the back of the spring body 15 is fixedly connected to the front of the anti-corrosion nut 10, and the outer wall of the spring body 15 is fixedly installed with an anti-corrosion coating 16, and the outer wall of the anti-corrosion coating 16 is fixedly installed with a wear-resistant coating 17. The material of the spring body 15 is stainless steel, which has excellent corrosion resistance, high temperature strength and good elasticity, and can maintain stable performance for a long time in a petrochemical environment. The spring body 15 can exert a certain elasticity on the nut to keep it tightened and prevent the nut from loosening and falling off. The material of the anti-corrosion coating 16 is a special high molecular polymer, which has excellent chemical corrosion resistance, high temperature resistance and wear resistance. It can be tightly attached to the surface of the spring body 15 to form a solid protective barrier, effectively preventing the spring body 15 from being eroded and worn by corrosive substances. The material of the wear-resistant coating 17 is ceramic powder, which has extremely high hardness, good wear resistance and corrosion resistance, and can enable the anti-loosening spring 11 to maintain stable performance for a long time in a petrochemical environment. The wear-resistant coating 17 is evenly covered on the surface of the anti-corrosion coating 16 through a spraying process to form a hard and smooth protective layer, which effectively resists the wear and corrosion of the spring body 15 caused by friction and impact. At the same time, the ceramic powder also has a low friction coefficient, which can reduce the friction resistance of the nut during tightening and loosening, thereby improving the use efficiency. At the same time, the ceramic powder also has excellent insulation properties, which can effectively prevent the occurrence of electrochemical corrosion and further extend the service life of the petrochemical special nuts. By setting up the first anti-corrosion and wear-resistant coating 13, the metal pretreatment bottom layer on the first anti-corrosion and wear-resistant coating 13 adopts a special metal pretreatment agent to clean and activate the surface of the nut body 12, enhance the adhesion between the coating and the substrate, ensure that the coating can be evenly and stably adhered to the surface of the nut body 12, prevent the coating from falling off or peeling off, and the polymer wear-resistant topcoat layer on the first anti-corrosion and wear-resistant coating 13 can resist ultraviolet rays, high temperature and humidity in the petrochemical environment, and maintain the beauty and gloss of the overall nut surface.

[0025] The working principle of the utility model: when the petrochemical special nut is used in a petrochemical environment, the nut body 12 of the anti-corrosion nut 10 and the first anti-corrosion and wear-resistant coating 13 jointly enhance the anti-corrosion performance of the nut, and prevent the nut from being eroded and worn by corrosive substances. At the same time, the spring body 15 of the anti-loosening spring 11 exerts a certain elasticity on the nut to maintain its tightening effect and prevent the nut from loosening and falling off. The anti-corrosion coating 16 and the wear-resistant coating 17 on the anti-loosening spring 11 can be tightly attached to the surface of the spring body 15 to form a solid protective barrier, which effectively prevents the spring body 15 from being eroded and worn by corrosive substances and extends the service life of the spring. During use, the polymer wear-resistant topcoat layer on the first anti-corrosion and wear-resistant coating 13 can resist ultraviolet rays, high temperature and humidity in the petrochemical environment, and maintain the beauty and gloss of the overall nut surface.

[0026] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. 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, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A nut for petrochemical industry, comprising an anti-corrosion nut (10), characterized in that: The front side of the anti-corrosion nut (10) is fixedly provided with an anti-loosening spring (11), the anti-corrosion nut (10) comprises a nut body (12), the outer wall of the nut body (12) is fixedly provided with a first anti-corrosion and wear-resistant coating (13), the inner wall of the nut body (12) is fixedly provided with a second anti-corrosion and wear-resistant coating (14), the anti-loosening spring (11) comprises a spring body (15), the back side of the spring body (15) is fixedly connected to the front side of the anti-corrosion nut (10), the outer wall of the spring body (15) is fixedly provided with an anti-corrosion coating (16), and the outer wall of the anti-corrosion coating (16) is fixedly provided with a wear-resistant coating (17).

2. The petrochemical special nut according to claim 1, characterized in that: The material of the nut body (12) is high-strength alloy steel.

3. The petrochemical special nut according to claim 1, characterized in that: The first anti-corrosion and wear-resistant coating (13) comprises a metal pre-treatment base layer, an anti-corrosion polymer barrier layer and a polymer wear-resistant topcoat layer.

4. The petrochemical special nut according to claim 1, characterized in that: The material of the second anti-corrosion and wear-resistant coating (14) is an oxide protective film.

5. The petrochemical special nut according to claim 1, characterized in that: The spring body (15) is made of stainless steel.

6. The petrochemical special nut according to claim 1, characterized in that: The material of the anti-corrosion coating (16) is a specially made high molecular polymer.

7. The petrochemical special nut according to claim 1, characterized in that: The material of the wear-resistant coating (17) is ceramic powder.

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