Anti-static flexible connection structure and pipe network connection assembly

Abstract

The application belongs to the technical field of pipeline connecting structure, and discloses an antistatic flexible connecting structure and a pipe network connecting assembly, which comprises a flexible connecting bellows used for connecting two pipeline bodies, and the composition of the flexible connecting bellows is as follows in terms of weight percentage: polyolefin elastomer 40%-60%, carbon black 15%-25%, vinyl elastomer 5%-15%, antistatic additive 1%-5%, heat stabilizer 0.5%-2%, ethylene-vinyl alcohol copolymer 5%-10%, lubricant 0.5%-2%, and the balance is polyisobutylene. In the application, the components synergistically act to make the flexible connecting bellows have good flexibility, mechanical property, elasticity, fatigue resistance and sealing property, have antistatic characteristics, have good processing and molding effects, can prevent thermal aging degradation, and guarantee core performance.

Description

Technical Field

[0001] This invention relates to the field of pipeline connection structure technology, and in particular to an antistatic flexible connection structure and a pipeline network connection assembly. Background Technology

[0002] In industrial production, pipeline systems are widely used for the transportation of fluids (such as gases and liquids). Flexible connections are typically required between adjacent pipeline sections to compensate for displacement caused by thermal expansion and contraction, vibration, etc., while also reducing vibration transmission within the pipeline system. Currently, most flexible connection structures on the market are made of materials such as rubber and ordinary plastics. While they possess a certain degree of flexibility and sealing, they have significant shortcomings in terms of antistatic performance.

[0003] In certain specialized industries, such as chemical, oil and gas, and dust transportation, the media transported in pipelines often possess flammable and explosive properties. During long-term use, flexible connection structures are highly susceptible to static electricity generation due to friction between the fluid and the pipeline wall, as well as friction within the flexible connection's own materials. The existing flexible connection materials have high surface resistivity, making it difficult to dissipate the generated static electricity in a timely manner. This leads to the continuous accumulation of static electricity on the flexible connection surface. When the accumulated static electricity reaches a certain level, it may trigger a spark discharge, potentially igniting or detonating the transported flammable and explosive media, posing a significant safety hazard.

[0004] Although some flexible connection structures improve their antistatic performance by adding a small amount of antistatic material, their antistatic effect is unstable due to factors such as unreasonable material formulation design and lack of effective grounding conduction mechanism. This makes it difficult to meet the long-term and reliable antistatic requirements of pipeline connection structures in flammable and explosive environments, and cannot fundamentally solve the safety risks caused by static electricity accumulation. Summary of the Invention

[0005] To address the above problems, the present invention provides an antistatic flexible connection structure and a pipeline connection assembly.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an antistatic flexible connection structure, comprising a flexible corrugated pipe for connecting two pipe bodies, wherein the flexible corrugated pipe is composed of the following components by weight percentage: 40%-60% polyolefin elastomer, 15%-25% carbon black, 5%-15% vinyl elastomer, 1%-5% antistatic additive, 0.5%-2% heat stabilizer, 5%-10% ethylene-vinyl alcohol copolymer, 0.5%-2% lubricant, and the balance being polyisobutylene.

[0007] By adopting the above technical solutions, polyolefin elastomers, with their excellent flexibility and mechanical properties, provide basic support for flexible corrugated pipes; carbon black can effectively reduce the surface resistivity of materials, giving flexible corrugated pipes antistatic properties; vinyl elastomers can improve the elasticity and fatigue resistance of materials; antistatic additives (such as quaternary ammonium salt compounds) can further improve the antistatic effect of flexible corrugated pipes; heat stabilizers (such as stearate compounds) can prevent materials from aging and degrading due to heat during processing and use; lubricants can reduce the friction between materials during the preparation of flexible corrugated pipes, prevent sticking to the mold, and improve the molding effect; polyisobutylene has good flexibility and sealing properties, and is compatible with other polyolefin components, further improving the softness and fit of flexible corrugated pipes without affecting core properties such as antistatic properties.

[0008] Furthermore, a first flange is fixed to one side of each of the two main pipe bodies that are close to each other, and a second flange is fixed to both ends of the flexible connecting bellows. The second flange and the first flange are connected by a fixing component. The antistatic flexible connection structure also includes a metal protective mesh frame sleeved on the outside of the flexible connecting bellows and a grounding mechanism for grounding the first flange, the second flange and the metal protective mesh frame.

[0009] By adopting the above technical solution, the fixing components are used to fix the second flange to the first flange, thereby connecting both ends of the flexible corrugated pipe to the pipe body (the technique of connecting two pipes with flanges and maintaining a seal between the flexible corrugated pipe and the pipe body is a conventional method in the prior art and will not be elaborated further here). The grounding mechanism ensures that the first flange, the second flange, and the metal protective mesh frame are all grounded, thus giving the antistatic flexible connection structure a good antistatic effect and guaranteeing the safety and user experience of the antistatic flexible connection structure during use.

[0010] Furthermore, the metal protective mesh frame includes an annular body sleeved on the outside of the flexible corrugated pipe and coaxial with it, and flexible connecting strips attached to the outer wall of the flexible corrugated pipe. The number of annular bodies is equal to the number of troughs of the flexible corrugated pipe and their positions correspond one-to-one. The outer surface of the flexible connecting strip is attached to the inner surface of the annular body. Multiple flexible connecting strips are provided and evenly distributed about the axis of the flexible corrugated pipe.

[0011] By adopting the above technical solution, the metal protective mesh frame composed of multiple rings and multiple flexible connecting strips plays a certain role in structural reinforcement of the flexible connecting corrugated pipe, which helps to ensure the stability of the flexible connecting corrugated pipe during use.

[0012] Furthermore, the fixing components are provided in multiple sets and evenly distributed around the periphery of the pipe body. The fixing components include fixing bolts that pass through the second flange and the first flange and are clearance-fitted to both, and fixing nuts that are threaded onto the fixing bolts. The grounding mechanism includes a jumper wire and an installation component. The jumper wire is sleeved on the fixing bolts, and the two ends of the jumper wire are located on the opposite sides of the first flange and the second flange. The installation component includes a mounting bracket located below the flexible corrugated pipe and a crossbar fixed between the brackets on both sides of the mounting bracket and parallel to the axis of the pipe body. Both the mounting bracket and the crossbar are made of metal. The grounding mechanism also includes a connecting component for connecting the ring body to the crossbar and a grounding component for grounding the bottom of the mounting bracket.

[0013] Furthermore, the number of connecting components is equal to the number of annular bodies and their positions correspond one-to-one. The connecting components include a sliding ring sleeved on the crossbar and slidably engaged, a connecting spring fixed to the top of the sliding ring, a connecting plate fixed to the upper end of the connecting spring, an arc-shaped plate fixed to the top of the connecting plate, and rotating rollers rotatably mounted on the arc-shaped plate. There are two arc-shaped plates symmetrically distributed at both ends of the connecting plate, and two rotating rollers symmetrically distributed on both sides of the connecting plate. The inner surface of the bottom of the annular body abuts against the annular surface of the sliding ring, and the outer surface of the annular body near its bottom abuts against the side of the two rotating rollers that are close to each other.

[0014] By adopting the above technical solution, after tightening the fixing nut, the fixing nut cooperates with the fixing bolt and ensures the stability of the connection between the pipe body and the flexible corrugated pipe. The flexible corrugated pipe may expand or contract during use. During this process, due to the setting of the connecting spring, the inner surface of the bottom of the ring body abuts against the annular surface of the sliding ring. At the same time, the outer surface of the ring body near its bottom abuts against the side of the two rotating rollers that are close to each other. Therefore, the inner surface of the ring body is always in contact with the outer surface of the trough section of the flexible corrugated pipe. The flexible corrugated pipe cooperates with the ring body and abuts against the flexible connecting strip, thereby ensuring the stability of the metal protective mesh frame composed of multiple flexible connecting strips and multiple ring bodies during use.

[0015] Furthermore, a sleeve is fixed to the top of the sliding ring, and a pull rod is provided inside the sliding ring to slide with it. The upper end of the pull rod is fixed to the bottom of the connecting plate, and a connecting spring is sleeved on the outside of the sleeve and the pull rod.

[0016] By adopting the above technical solution, the sleeve and tie rod are designed to guide the extension and retraction of the connecting spring, ensuring the stability of the annulus during the adaptive deformation process of the flexible corrugated pipe.

[0017] Furthermore, the grounding assembly includes an upper plate fixed to the bottom of the mounting bracket, an upper connecting rod hinged to the upper plate, and a V-shaped plate hinged to the lower end of the upper connecting rod. Two upper connecting rods are provided and are parallel to each other. The line connecting the hinge points between the upper plate and the two upper connecting rods is parallel to the line connecting the upper section of the V-shaped plate and the hinge points between the two upper connecting rods. The grounding assembly also includes a gas spring hinged to the bottom of the mounting bracket, a lower connecting rod hinged to the lower section of the V-shaped plate, a lower plate hinged to the lower end of the lower connecting rod, and a horizontal plate fixed to the bottom of the lower plate. A grounding rod is fixed to the bottom of the horizontal plate; the lower end of the gas spring is hinged to one of the upper connecting rods; there are two lower connecting rods that are parallel to each other; the line connecting the hinge points between the lower plate and the two lower connecting rods is parallel to the line connecting the hinge points between the lower section of the V-shaped plate and the two lower connecting rods; meshing gears are fixed on the hinge shaft between the V-shaped plate and one of the upper connecting rods and the hinge shaft between the V-shaped plate and one of the lower connecting rods; the upper plate, upper connecting rod, V-shaped plate, lower connecting rod, lower plate, horizontal plate and grounding rod are all made of metal.

[0018] By adopting the above technical solution, under the combined action of the gas spring and the two gears, the parallelogram formed by the upper section of the V-shaped plate, the upper plate and the two upper connecting rods, and the parallelogram formed by the lower section of the V-shaped plate, the lower plate and the two lower connecting rods remain stable, and the grounding rod at the bottom of the horizontal plate is always inserted into the ground, thereby enabling the pipe structure composed of the flexible corrugated pipe and the two pipe bodies to have good anti-static performance.

[0019] Furthermore, a grounding wire is fixed between the bottom of the mounting bracket and the top of the horizontal plate, and connecting ears are fixed on the arc-shaped surfaces of the two second flanges. A reinforcing rod with clearance fit is provided between the two connecting ears, and a reinforcing nut with threaded connection is fitted on the reinforcing rod.

[0020] By adopting the above technical solution, the setting of the reinforcing rod and the reinforcing nut ensures that the distance between the two second flanges is constant. During use, the flexible corrugated pipe only expands or contracts in its radial direction, which improves the stability of the flexible corrugated pipe and the two pipe bodies during use.

[0021] Furthermore, abutment blocks are fixed to the outer surface of the flexible corrugated pipe near both ends. Multiple flexible connecting strips are fixed to both ends with clamps coaxial with the main body of the pipe. The sides of the two clamps that are close to each other abut against the sides of the two abutment blocks that are far from each other. The two ends of the clamps are connected by connecting bolts and connecting nuts. Metal plates are fixed on the clamps. The fixing bolts that pass through the jumper wires also pass through the metal plates and are fitted with a gap.

[0022] By adopting the above technical solution, the setting of connecting bolts and connecting nuts enables the clamp to fix the end of the flexible connection bellows; the metal sheet and the jumper wire cooperate to ensure the grounding of the clamp, so that each part of the antistatic flexible connection structure has a good antistatic effect.

[0023] This application also discloses a pipeline connection assembly including the above-mentioned antistatic flexible connection structure, wherein two adjacent pipeline bodies are connected by a flexible corrugated pipe.

[0024] In summary, the present invention has the following beneficial effects:

[0025] 1. In this application, polyolefin elastomers, with their excellent flexibility and mechanical properties, provide basic support for flexible corrugated pipes; carbon black can effectively reduce the surface resistivity of materials, giving flexible corrugated pipes antistatic properties; vinyl elastomers can improve the elasticity and fatigue resistance of materials; antistatic additives (such as quaternary ammonium salt compounds) can further improve the antistatic effect of flexible corrugated pipes; heat stabilizers (such as stearate compounds) can prevent materials from aging and degrading due to heat during processing and use; lubricants can reduce the friction between materials during the preparation of flexible corrugated pipes, prevent sticking to the mold, and improve the molding effect; polyisobutylene has good flexibility and sealing properties, and is compatible with other polyolefin components, further improving the softness and fit of flexible corrugated pipes without affecting core properties such as antistatic properties;

[0026] 2. The grounding mechanism in this application ensures that the first flange, the second flange, and the metal protective mesh frame are all grounded, thereby giving the antistatic flexible connection structure a good antistatic effect and guaranteeing the safety and user experience of the antistatic flexible connection structure during use. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the flexible connecting bellows structure in an embodiment of the present invention;

[0029] Figure 3 yes Figure 1 A schematic diagram of the structure after removing the flexible connecting bellows;

[0030] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0031] Figure 5 This is a schematic diagram illustrating the structure of the connecting component in an embodiment of the present invention;

[0032] Figure 6 yes Figure 5Enlarged view of point B in the middle;

[0033] Figure 7 This is a schematic diagram illustrating the connection structure between the connecting components in an embodiment of the present invention;

[0034] Figure 8 yes Figure 7 Enlarged diagram of point C in the middle.

[0035] In the diagram: 1. Pipe body; 11. First flange; 2. Flexible corrugated pipe; 21. Second flange; 211. Connecting lug; 22. Abutment block; 23. Clamp; 231. Connecting bolt; 232. Connecting nut; 233. Metal sheet; 3. Fixing assembly; 31. Fixing bolt; 32. Fixing nut; 4. Metal protective mesh frame; 41. Circular ring; 42. Flexible connecting strip; 5. Grounding mechanism; 51. Jumper wire; 52. Mounting assembly; 521. Mounting bracket; 52 2. Crossbar; 53. Connecting assembly; 531. Sliding ring; 532. Connecting spring; 533. Connecting plate; 534. Arc-shaped plate; 535. Rotating roller; 54. Grounding assembly; 541. Upper plate; 542. Upper connecting rod; 543. V-shaped plate; 544. Gas spring; 545. Lower connecting rod; 546. Lower plate; 547. Crossbar; 548. Grounding rod; 6. Sleeve; 61. Pull rod; 7. Gear; 8. Reinforcing rod; 81. Reinforcing nut; 9. Grounding wire. Detailed Implementation

[0036] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] like Figure 1-8 As shown in the embodiment of this application, an antistatic flexible connection structure is disclosed, including a flexible corrugated pipe 2 for connecting two pipe bodies 1. The components of the flexible corrugated pipe 2 by weight percentage are as follows: 40%-60% polyolefin elastomer, 15%-25% carbon black, 5%-15% vinyl elastomer, 1%-5% antistatic additive, 0.5%-2% heat stabilizer, 5%-10% ethylene-vinyl alcohol copolymer, 0.5%-2% lubricant, and the balance is polyisobutylene.

[0038] Polyolefin elastomers, with their excellent flexibility and mechanical properties, provide a fundamental support for the flexible corrugated pipe 2; carbon black effectively reduces the surface resistivity of the material, giving the flexible corrugated pipe 2 antistatic properties; vinyl elastomers enhance the elasticity and fatigue resistance of the material; antistatic additives (such as quaternary ammonium salt compounds) further improve the antistatic effect of the flexible corrugated pipe 2; heat stabilizers (such as stearate compounds) prevent the material from aging and degrading due to heat during processing and use; lubricants reduce the friction between materials during the preparation of the flexible corrugated pipe 2, prevent sticking to the mold, and improve the molding effect; polyisobutylene has good flexibility and sealing properties, is compatible with other polyolefin components, further improves the softness and fit of the flexible corrugated pipe 2, and does not affect the core properties such as antistatic properties.

[0039] The two main pipe bodies 1 are each fixed with a first flange 11 on one side close to each other, and the flexible connecting bellows 2 are each fixed with a second flange 21 at both ends. The second flange 21 and the first flange 11 are connected by a fixing component 3. The antistatic flexible connection structure also includes a metal protective mesh frame 4 sleeved on the outside of the flexible connecting bellows 2 and a grounding mechanism 5 for grounding the first flange 11, the second flange 21 and the metal protective mesh frame 4.

[0040] The fixing component 3 securely connects the second flange 21 to the first flange 11, thereby connecting both ends of the flexible corrugated pipe 2 to the pipe body 1. (The technique of connecting two pipes through flanges and maintaining a seal between the flexible corrugated pipe 2 and the pipe body 1 is a conventional method in the prior art, such as adding an annular rubber ring between the second flange 21 and the first flange 11, which will not be elaborated further here.) The grounding mechanism 5 ensures that the first flange 11, the second flange 21, and the metal protective mesh frame 4 are all grounded, thus giving the antistatic flexible connection structure a good antistatic effect and ensuring the safety and user experience of the antistatic flexible connection structure during use.

[0041] The metal protective mesh frame 4 includes an annular body 41 sleeved on the outside of the flexible corrugated pipe 2 and coaxial with it, and flexible connecting strips 42 attached to the outer wall of the flexible corrugated pipe 2. The number of annular bodies 41 is equal to the number of troughs of the flexible corrugated pipe 2, and their positions correspond one-to-one. The outer surface of the flexible connecting strips 42 is attached to the inner surface of the annular bodies 41, and multiple flexible connecting strips 42 are evenly distributed about the axis of the flexible corrugated pipe 2. The metal protective mesh frame 4, composed of multiple annular bodies 41 and multiple flexible connecting strips 42, provides a certain structural reinforcement to the flexible corrugated pipe 2, which helps to ensure the stability of the flexible corrugated pipe 2 during use.

[0042] The fixing components 3 are provided in multiple sets and evenly distributed around the pipe body 1. The fixing components 3 include fixing bolts 31 that pass through the second flange 21 and the first flange 11 and are clearance-fitted to both, and fixing nuts 32 that are sleeved on the fixing bolts 31 and threadedly connected. The grounding mechanism 5 includes a jumper wire 51 and an installation component 52. The jumper wire 51 is sleeved on the fixing bolts 31, and the two ends of the jumper wire 51 are located on the side of the first flange 11 and the second flange 21 that are far apart from each other. The installation component 52 includes a mounting bracket 521 located below the flexible corrugated pipe 2 and a crossbar 522 fixed between the brackets on both sides of the mounting bracket 521 and parallel to the axis of the pipe body 1. Both the mounting bracket 521 and the crossbar 522 are made of metal. The grounding mechanism 5 also includes a connecting component 53 for connecting the ring 41 and the crossbar 522 and a grounding component 54 for grounding the bottom of the mounting bracket 521.

[0043] The number of connecting components 53 is equal to the number of annular bodies 41 and their positions correspond one-to-one. The connecting components 53 include a sliding ring 531 sleeved on the crossbar 522 and slidably engaged, a connecting spring 532 fixed to the top of the sliding ring 531, a connecting plate 533 fixed to the upper end of the connecting spring 532, an arc-shaped plate 534 fixed to the top of the connecting plate 533, and a rotating roller 535 rotatably mounted on the arc-shaped plate 534. There are two arc-shaped plates 534 symmetrically distributed at both ends of the connecting plate 533. There are two rotating rollers 535 symmetrically distributed on both sides of the connecting plate 533. The inner surface of the bottom of the annular body 41 abuts against the annular surface of the sliding ring 531, and the outer surface of the annular body 41 near its bottom abuts against the side of the two rotating rollers 535 that are close to each other.

[0044] After tightening the fixing nut 32, the fixing nut 32 cooperates with the fixing bolt 31 and ensures the stability of the connection between the pipe body 1 and the flexible corrugated pipe 2. The flexible corrugated pipe 2 may expand or contract during use. During this process, due to the setting of the connecting spring 532, the inner surface of the bottom of the ring 41 is pressed against the annular surface of the sliding ring 531. At the same time, the outer surface of the ring 41 near its bottom is pressed against the side of the two rotating rollers 535 that are close to each other. Therefore, the inner surface of the ring 41 is always pressed against the outer surface of the trough section of the flexible corrugated pipe 2. The flexible corrugated pipe 2 and the ring 41 cooperate and press against the flexible connecting strip 42, thereby ensuring the stability of the metal protective mesh frame 4 composed of multiple flexible connecting strips 42 and multiple rings 41 during use.

[0045] A sleeve 6 is fixed to the top of the sliding ring 531. A pull rod 61, which slides within the sliding ring 531, is fixed to the bottom of the connecting plate 533. A connecting spring 532 is sleeved on the outside of the sleeve 6 and the pull rod 61. The sleeve 6 and the pull rod 61 work together to guide the extension and retraction of the connecting spring 532, ensuring the stability of the ring 41 during the adaptive deformation process of the flexible corrugated pipe 2.

[0046] The grounding assembly 54 includes an upper plate 541 fixed to the bottom of the mounting bracket 521, an upper connecting rod 542 hinged to the upper plate 541, and a V-shaped plate 543 hinged to the lower end of the upper connecting rod 542. Two upper connecting rods 542 are provided and are parallel to each other. The line connecting the hinge points between the upper plate 541 and the two upper connecting rods 542 is parallel to the line connecting the upper section of the V-shaped plate 543 and the hinge points between the two upper connecting rods 542. The grounding assembly 54 also includes a gas spring 544 hinged to the bottom of the mounting bracket 521, a lower connecting rod 545 hinged to the lower section of the V-shaped plate 543, a lower plate 546 hinged to the lower end of the lower connecting rod 545, a horizontal plate 547 fixed to the bottom of the lower plate 546, and a horizontal plate 547 fixed to the bottom of the lower plate 546. The bottom of the horizontal plate 547 has a grounding rod 548; the lower end of the gas spring 544 is hinged to one of the upper connecting rods 542; there are two lower connecting rods 545 that are parallel to each other; the line connecting the hinge points between the lower plate 546 and the two lower connecting rods 545 is parallel to the line connecting the lower section of the V-shaped plate 543 and the two lower connecting rods 545; gears 7 that mesh with each other are fixed on the hinge shaft between the V-shaped plate 543 and one of the upper connecting rods 542 and the hinge shaft between the V-shaped plate 543 and one of the lower connecting rods 545; the upper plate 541, upper connecting rod 542, V-shaped plate 543, lower connecting rod 545, lower plate 546, horizontal plate 547 and grounding rod 548 are all made of metal.

[0047] Under the combined action of the gas spring 544 and the two gears 7, the parallelogram formed by the upper section of the V-shaped plate 543, the upper plate 541 and the two upper connecting rods 542, and the parallelogram formed by the lower section of the V-shaped plate 543, the lower plate 546 and the two lower connecting rods 545 remain stable, and the grounding rod 548 at the bottom of the horizontal plate 547 is always inserted into the ground, so that the pipe structure composed of the flexible corrugated pipe 2 and the two pipe bodies 1 has good anti-static performance.

[0048] A grounding wire 9 is fixed between the bottom of the mounting bracket 521 and the top of the horizontal plate 547. Connecting ears 211 are fixed to the arc-shaped surfaces of both second flanges 21. A reinforcing rod 8, with clearance fitting between the two connecting ears 211, is provided. A reinforcing nut 81, threadedly connected to the reinforcing rod 8, is fitted onto the reinforcing rod 8. The arrangement of the reinforcing rod 8 and the reinforcing nut 81 ensures a constant distance between the two second flanges 21. During use, the flexible corrugated pipe 2 only expands or contracts radially, improving the stability of the flexible corrugated pipe 2 and the two pipe bodies 1 during use.

[0049] The flexible corrugated pipe 2 has abutment blocks 22 fixed near both ends on its outer surface. Multiple flexible connecting strips 42 have clamps 23 coaxial with the pipe body 1 fixed at both ends. The sides of two clamps 23 that are close to each other abut against the sides of two abutment blocks 22 that are far apart. The two ends of the clamps 23 are connected by connecting bolts 231 and connecting nuts 232. A metal plate 233 is fixed on the clamp 23. The fixing bolt 31, which passes through the jumper wire 51, also passes through the metal plate 233 and has a clearance fit with it. The connecting bolts 231 and connecting nuts 232 fix the ends of the flexible corrugated pipe 2 with the clamps 23. The metal plate 233, in conjunction with the jumper wire 51, ensures the grounding of the clamps 23, giving each part of the antistatic flexible connection structure a good antistatic effect.

[0050] This application also discloses a pipeline connection assembly including the above-mentioned antistatic flexible connection structure, wherein two adjacent pipeline bodies 1 are connected by a flexible corrugated pipe 2.

[0051] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An antistatic flexible connection structure, characterized in that: The flexible corrugated pipe (2) used to connect two pipe bodies (1) is composed of the following components by weight percentage: 40%-60% polyolefin elastomer, 15%-25% carbon black, 5%-15% vinyl elastomer, 1%-5% antistatic agent, 0.5%-2% heat stabilizer, 5%-10% ethylene-vinyl alcohol copolymer, 0.5%-2% lubricant, and the balance being polyisobutylene; The two pipe bodies (1) are fixed with a first flange (11) on the side close to each other, and the flexible corrugated pipe (2) is fixed with a second flange (21) at both ends. The second flange (21) and the first flange (11) are connected by a fixing component (3). The antistatic flexible connection structure also includes a metal protective mesh frame (4) sleeved on the outside of the flexible connection corrugated pipe (2) and a grounding mechanism (5) for grounding the first flange (11), the second flange (21) and the metal protective mesh frame (4); The metal protective mesh frame (4) includes a ring (41) sleeved on the outside of the flexible corrugated pipe (2) and coaxial with it, and a flexible connecting strip (42) attached to the outer wall of the flexible corrugated pipe (2). The number of rings (41) is equal to the number of troughs of the flexible corrugated pipe (2) and their positions correspond one-to-one. The outer surface of the flexible connecting strip (42) is attached to the inner surface of the ring (41). Multiple flexible connecting strips (42) are provided and evenly distributed about the axis of the flexible corrugated pipe (2). The fixing assembly (3) is provided in multiple sets and evenly distributed around the pipe body (1). The fixing assembly (3) includes a fixing bolt (31) that passes through the second flange (21) and the first flange (11) and is clearance-fitted with both, and a fixing nut (32) that is sleeved on the fixing bolt (31) and threadedly connected. The grounding mechanism (5) includes a jumper wire (51) and a mounting assembly (52). The jumper wire (51) is fitted onto a fixing bolt (31). The two ends of the jumper wire (51) are located on opposite sides of the first flange (11) and the second flange (21). The mounting assembly (52) includes a mounting bracket (521) located below the flexible corrugated pipe (2) and a crossbar (522) fixed between the brackets on both sides of the mounting bracket (521) and parallel to the axis of the pipe body (1). Both the mounting bracket (521) and the crossbar (522) are made of metal. The grounding mechanism (5) also includes a connecting assembly (53) for connecting the ring (41) and the crossbar (522) and a grounding assembly (54) for grounding the bottom of the mounting bracket (521).

2. The antistatic flexible connection structure according to claim 1, characterized in that: The number of connecting components (53) is equal to the number of annular bodies (41) and their positions correspond one-to-one. The connecting components (53) include a sliding ring (531) sleeved on the crossbar (522) and slidably engaged, a connecting spring (532) fixed to the top of the sliding ring (531), a connecting plate (533) fixed to the upper end of the connecting spring (532), an arc-shaped plate (534) fixed to the top of the connecting plate (533), and a rotating roller (535) rotatably mounted on the arc-shaped plate (534). There are two arc-shaped plates (534) symmetrically distributed at both ends of the connecting plate (533), and there are two rotating rollers (535) symmetrically distributed on both sides of the connecting plate (533). The inner surface of the bottom of the annular body (41) abuts against the annular surface of the sliding ring (531), and the outer surface of the annular body (41) near its bottom abuts against the side of the two rotating rollers (535) that are close to each other.

3. The antistatic flexible connection structure according to claim 2, characterized in that: A sleeve (6) is fixed to the top of the sliding ring (531). A pull rod (61) is provided inside the sliding ring (531) and slides with it. The upper end of the pull rod (61) is fixed to the bottom of the connecting plate (533), and the connecting spring (532) is sleeved on the outside of the sleeve (6) and the pull rod (61).

4. The antistatic flexible connection structure according to claim 2, characterized in that: The grounding assembly (54) includes an upper plate (541) fixed to the bottom of the mounting bracket (521), an upper connecting rod (542) hinged to the upper plate (541), and a V-shaped plate (543) hinged to the lower end of the upper connecting rod (542). There are two upper connecting rods (542) that are parallel to each other. The line connecting the hinge points between the upper plate (541) and the two upper connecting rods (542) is parallel to the upper section of the V-shaped plate (543) and the two connecting rods (542). The grounding assembly (54) also includes a gas spring (544) hinged to the bottom of the mounting bracket (521), a lower connecting rod (545) hinged to the lower section of the V-shaped plate (543), a lower plate (546) hinged to the lower end of the lower connecting rod (545), a horizontal plate (547) fixed to the bottom of the lower plate (546), and a grounding rod (548) fixed to the bottom of the horizontal plate (547). The lower end of the gas spring (544) is hinged to one of the upper connecting rods (542). There are two lower connecting rods (545) that are parallel to each other. The line connecting the hinge points between the lower plate (546) and the two lower connecting rods (545) is parallel to the line connecting the lower section of the V-shaped plate (543) and the two lower connecting rods (545). The hinge shafts between the V-shaped plate (543) and one of the upper connecting rods (542) and between the V-shaped plate (543) and one of the lower connecting rods (545) are respectively fixed with meshing gears (7). The upper plate (541), upper connecting rod (542), V-shaped plate (543), lower connecting rod (545), lower plate (546), horizontal plate (547) and grounding rod (548) are all made of metal.

5. The antistatic flexible connection structure according to claim 4, characterized in that: A grounding wire (9) is fixed between the bottom of the mounting bracket (521) and the top of the horizontal plate (547). Connecting ears (211) are fixed on the arc surfaces of the two second flanges (21). A reinforcing rod (8) with clearance fit is provided between the two connecting ears (211). A reinforcing nut (81) with threaded connection is fitted on the reinforcing rod (8).

6. The antistatic flexible connection structure according to claim 4, characterized in that: The outer surface of the flexible corrugated pipe (2) is fixed with abutment blocks (22) near both ends. Both ends of multiple flexible connecting strips (42) are fixed with clamps (23) coaxial with the pipe body (1). The sides of the two clamps (23) that are close to each other abut against the sides of the two abutment blocks (22) that are far apart from each other. The two ends of the clamps (23) are connected by connecting bolts (231) and connecting nuts (232). A metal plate (233) is fixed on the clamps (23). The fixing bolts (31) that pass through the jumper wire (51) also pass through the metal plate (233) and are clearance-fitted.

7. A pipeline connection assembly with an antistatic flexible connection structure according to any one of claims 1-6, characterized in that: The two adjacent pipe bodies (1) are connected by a flexible corrugated pipe (2).

Images