Anti-static connection structure of petrochemical pipeline flange

Abstract

The utility model discloses a kind of anti-static connection structure of petroleum chemical pipeline flange, belong to petroleum chemical pipeline connection technical field, including first pipeline and second pipeline, the inner ring of fixed flange and movable flange butt joint end face is respectively provided with conducting groove, the fixed flange is fixed with conducting column by conducting groove, the movable flange is fixed with conducting sleeve by conducting groove, the conducting column is compatible with conducting sleeve, the fixed flange and movable flange are tightly with anti-static sealing gasket between. Through the effect of anti-static sealing gasket, the sealing property of the connection between fixed flange and movable flange is increased, medium leakage is avoided, and due to the conductivity of itself auxiliary conduction static electricity, the cooperation of conducting groove, conducting column and conducting sleeve is used again, conducting main passage is formed between fixed flange and movable flange, to form multiple-path conducting path, improve the safety when petroleum chemical pipeline conveys flammable and explosive medium.

Description

Technical Field

[0001] This utility model belongs to the field of petrochemical pipeline connection technology, specifically, it relates to an anti-static connection structure for petrochemical pipeline flanges. Background Technology

[0002] In the petrochemical industry, pipelines often transport flammable and explosive substances such as gasoline, diesel, and crude oil. As the medium flows through the pipeline, it generates static electricity through friction with the inner wall of the pipeline. At the same time, due to the insulating properties of the sealing gaskets (such as rubber gaskets and polytetrafluoroethylene gaskets) at the flange connection, an effective conductive path cannot be formed between the flanges. Static electricity easily accumulates on the flange surface. When the static voltage reaches a certain threshold, it may trigger a spark discharge, which can then ignite the surrounding flammable and explosive medium, causing fires, explosions, and other safety accidents.

[0003] Currently, the industry primarily addresses flange anti-static issues by adding conductive gaskets between flanges. However, these gaskets are highly susceptible to the corrosive effects of petrochemical media during long-term use, and also face mechanical wear and natural aging. These factors cause a sharp decline in the conductivity of the gaskets, preventing them from consistently and stably fulfilling their intended anti-static function. Traditional technologies often design the sealing and anti-static functions of pipe flanges separately, making it difficult to ensure efficient static discharge while maintaining good sealing performance. For example, with common sealing gaskets, when they age and lose elasticity due to long-term use, not only does the risk of media leakage increase significantly, but it can also damage the already fragile conductive contact between flanges, further exacerbating safety hazards.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an anti-static connection structure for petrochemical pipeline flanges.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An antistatic connection structure for a petrochemical pipeline flange includes a first pipeline and a second pipeline. A fixed flange is fixedly mounted on the first pipeline, and a movable flange is fixedly mounted on the second pipeline. The fixed flange and the movable flange are detachably connected. Conductive grooves are respectively formed on the inner rings of the mating end faces of the fixed flange and the movable flange. A conductive post is fixedly mounted on the fixed flange through the conductive groove, and a conductive sleeve is fixedly mounted on the movable flange through the conductive groove. The conductive post and the conductive sleeve are adapted to each other. An antistatic sealing gasket is tightly abutted between the fixed flange and the movable flange.

[0008] Preferably, the outer wall of the conductive post and the inside of the conductive sleeve are fitted together, and the contact surface between the conductive post and the conductive sleeve is coated with conductive grease, so that a stable conductive path is formed between the fixed flange and the movable flange.

[0009] Preferably, the fixed flange and the movable flange are respectively provided with sealing grooves, which are adapted to the antistatic sealing gaskets to facilitate the installation and use of the antistatic sealing gaskets.

[0010] Preferably, the fixed flange and the movable flange are threaded with fixing bolts, and the outer side wall of the fixing bolts is threaded with nuts to stably connect the fixed flange and the movable flange.

[0011] Preferably, the fixed flange and the movable flange are respectively provided with threaded holes, which are adapted to the fixing bolts to facilitate the fixing bolts passing through the fixed flange and the movable flange.

[0012] Preferably, a conductive spring washer is tightly fitted between the movable flange and the nut, and the fixing bolt moves through the conductive spring washer to further eliminate the contact resistance of the bolt connection.

[0013] Preferably, a conductive terminal is fixed on the fixed flange, a grounding wire is fixed on the conductive terminal, and the connection between the fixed flange and the conductive terminal is coated with anti-rust conductive paint to safely discharge static electricity to the ground and avoid static electricity accumulation that could cause danger.

[0014] In summary, the technical effects and advantages of this utility model are as follows: The anti-static connection structure of this petrochemical pipeline flange increases the sealing performance between the fixed flange and the movable flange through the action of the anti-static sealing gasket, preventing media leakage. Furthermore, due to its own conductivity, it assists in the conduction of static electricity. With the combined use of conductive grooves, conductive columns, and conductive sleeves, a main conductive path is formed between the fixed flange and the movable flange, thereby forming a multi-path conductive path and improving the safety of petrochemical pipelines when transporting flammable and explosive media.

[0015] The use of threaded holes, fixing bolts, and nuts facilitates the connection between fixed and movable flanges. The conductive spring washer eliminates contact resistance in the bolt connection, supplements the conductive path, improves the integrity of electrostatic conduction, and ensures long-term stability of the bolt connection, preventing conductive failure due to loose connection.

[0016] By using conductive terminals and grounding wires together, static electricity is safely conducted to the ground, eliminating the risk of static electricity accumulation. Furthermore, the anti-rust conductive paint extends the service life of the grounding components and ensures the long-term effectiveness of the grounding function. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional exploded structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the fixed flange and related structures of this utility model;

[0019] Figure 3 This is a schematic diagram of the movable flange and its related structures of this utility model;

[0020] Figure 4 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0021] In the diagram: 1. First pipe; 2. Second pipe; 3. Fixed flange; 4. Movable flange; 5. Antistatic sealing gasket; 6. Conductive groove; 7. Conductive post; 8. Conductive sleeve; 9. Sealing groove; 10. Threaded hole; 11. Fixing bolt; 12. Nut; 13. Conductive spring washer; 14. Conductive terminal; 15. Grounding wire; 16. Rust-proof conductive paint. Detailed Implementation

[0022] This utility model provides an anti-static connection structure for petrochemical pipeline flanges. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit the scope of protection of this utility model.

[0023] Reference Figure 1-4 An antistatic connection structure for a petrochemical pipeline flange includes a first pipeline 1 and a second pipeline 2. A fixed flange 3 is fixed on the first pipeline 1, and a movable flange 4 is fixed on the second pipeline 2. The fixed flange 3 and the movable flange 4 are arranged in pairs and are detachably connected. Conductive grooves 6 are respectively opened on the inner rings of the mating end faces of the fixed flange 3 and the movable flange 4. A conductive post 7 is fixed to the fixed flange 3 through the conductive groove 6, and a conductive sleeve 8 is fixed to the movable flange 4 through the conductive groove 6. Both the conductive post 7 and the conductive sleeve 8 are made of copper, which effectively resists the corrosion of petrochemical media. The conductive post 7 and the conductive sleeve 8 are compatible. An antistatic sealing gasket 5 is tightly attached between the fixed flange 3 and the movable flange 4. The antistatic sealing gasket 5 is made of copper mesh reinforced graphite composite material, which has both sealing and conductive properties. Through the cooperation of the conductive post 7 and the conductive sleeve 8, a stable flange conductive path is formed. The antistatic sealing gasket 5 takes into account both sealing and auxiliary conductivity, so that multiple conductive paths are formed between the flanges, avoiding the accumulation of static electricity on the flanges, thereby improving the operational safety of the petrochemical pipeline.

[0024] Reference Figure 1-4The outer wall of the conductive post 7 fits snugly against the inside of the conductive sleeve 8, and the contact surface between the conductive post 7 and the conductive sleeve 8 is coated with conductive grease. On the one hand, the grease fills the tiny gaps, reduces the contact resistance, and makes the electrostatic conduction smoother; on the other hand, it isolates the air, delays the oxidation and corrosion of the contact surface, and maintains a low-resistance conductive state for a long time.

[0025] Reference Figure 1 The fixed flange 3 and the movable flange 4 are respectively provided with sealing grooves 9. The sealing grooves 9 are adapted to the antistatic sealing gaskets 5. The antistatic sealing gaskets 5 are embedded into the fixed flange 3 and the movable flange 4 through the sealing grooves 9, ensuring the installation stability of the antistatic sealing gaskets 5. After compression, they can reliably seal the pipeline medium and prevent leakage.

[0026] Reference Figure 1 and Figure 3 Fixed bolts 11 are threaded through the fixed flange 3 and the movable flange 4. Nuts 12 are threaded onto the outer side of the fixed bolts 11. Threaded holes 10 are respectively provided on the fixed flange 3 and the movable flange 4. The threaded holes 10 are adapted to the fixed bolts 11, allowing the fixed bolts 11 to pass through the fixed flange 3 and the movable flange 4. This enables the fixed bolts 11 and nuts 12 to stably connect the fixed flange 3 and the movable flange 4. The fixed bolts 11 and nuts 12 enable the flanges to be detachably connected, facilitating installation and maintenance. Precise adaptation ensures the flange docking accuracy, allowing the conductive post 7, sealing gasket, and other structures to work stably and collaboratively, improving the overall reliability and ease of maintenance of the structure.

[0027] Reference Figure 1 and Figure 3 A conductive spring washer 13 is tightly attached between the movable flange 4 and the nut 12. The fixing bolt 11 moves through the conductive spring washer 13. When the fixed flange 3 and the movable flange 4 are fixed, the conductive spring washer 13 is compressed and generates elastic force, which fills the tiny gap between the nut 12 and the flange, eliminates the contact resistance of the bolt connection, and allows static electricity to be conducted through the conductive spring washer 13, thus perfecting the conductive path.

[0028] Reference Figure 1-2 A conductive terminal 14 is fixed on the fixed flange 3, and a grounding wire 15 is fixed on the conductive terminal 14, forming the final conductive path from the flange to the ground, safely releasing static electricity and fundamentally eliminating the risk of static electricity accumulation. The connection between the fixed flange 3 and the conductive terminal 14 is coated with anti-rust conductive paint 16, which extends the service life of the grounding component, ensures the long-term effectiveness of the grounding function, comprehensively improves the anti-static system of petrochemical pipelines, and significantly reduces safety hazards.

[0029] Working principle: After the fixed flange 3 and the movable flange 4 are fitted together, the antistatic sealing gasket 5 is embedded in the sealing groove 9. The fixing bolt 11 passes through the threaded hole 10 through the fixed flange 3 and the movable flange 4. The tightening of the nut 12 provides mechanical force, compressing the antistatic sealing gasket 5 to achieve a seal, while making the conductive components more tightly connected and assisting in the conduction of static electricity. The conductive spring washer 13 is sandwiched between the movable flange 4 and the nut 12. When the fixing bolt 11 passes through, the conductive spring washer 13 is compressed and generates elastic force, filling the gap, eliminating the contact resistance of the bolt connection, and improving the conductive path. The conductive terminal 14 of the fixed flange 3 is connected to the grounding wire 15 to conduct static electricity into the grounding grid. When the fixed flange 3 and the movable flange 4 are tightened, the displacement of the antistatic sealing gasket 5 is restricted. After compression, it tightly seals the pipeline and conducts static electricity. The first pipeline 1 and the second pipeline 2 are connected through the fixed flange 3 and the movable flange 4. The conductive grooves 6 of the inner rings of the two flanges are respectively installed with matching conductive posts 7 and conductive sleeves 8, thereby forming the main conductive path between the flanges and avoiding the accumulation of static electricity.

[0030] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An anti-static connection structure for a petrochemical pipeline flange, characterized in that, The system includes a first pipe (1) and a second pipe (2). A fixed flange (3) is fixed on the first pipe (1), and a movable flange (4) is fixed on the second pipe (2). The fixed flange (3) and the movable flange (4) are detachably connected. Conductive grooves (6) are respectively opened on the inner rings of the mating end faces of the fixed flange (3) and the movable flange (4). A conductive post (7) is fixed on the fixed flange (3) through the conductive groove (6), and a conductive sleeve (8) is fixed on the movable flange (4) through the conductive groove (6). The conductive post (7) is adapted to the conductive sleeve (8). An antistatic sealing gasket (5) is tightly attached between the fixed flange (3) and the movable flange (4).

2. The anti-static connection structure for petrochemical pipeline flanges according to claim 1, characterized in that, The outer wall of the conductive post (7) and the inside of the conductive sleeve (8) are fitted together, and the contact surface between the conductive post (7) and the conductive sleeve (8) is coated with conductive grease.

3. The anti-static connection structure of the petrochemical pipeline flange according to claim 1, characterized in that, The fixed flange (3) and the movable flange (4) are respectively provided with sealing grooves (9), which are adapted to the antistatic sealing gasket (5).

4. The anti-static connection structure of the petrochemical pipeline flange according to claim 1, characterized in that, The fixed flange (3) and the movable flange (4) are threaded with fixing bolts (11), and the outer side wall of the fixing bolts (11) is threaded with nuts (12).

5. The anti-static connection structure of the petrochemical pipeline flange according to claim 4, characterized in that, The fixed flange (3) and the movable flange (4) are respectively provided with threaded holes (10), and the threaded holes (10) are adapted to the fixing bolts (11).

6. The anti-static connection structure of the petrochemical pipeline flange according to claim 4, characterized in that, A conductive spring washer (13) is tightly attached between the movable flange (4) and the nut (12), and the fixing bolt (11) moves through the conductive spring washer (13).

7. The anti-static connection structure of the petrochemical pipeline flange according to claim 1, characterized in that, The fixed flange (3) is fixed with a conductive terminal (14), and the conductive terminal (14) is fixed with a grounding wire (15). The connection between the fixed flange (3) and the conductive terminal (14) is coated with anti-rust conductive paint (16).

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