Inner and outer ring spiral wound gasket for petrochemical pipe flange

Abstract

The invention provides an inner and outer ring spiral wound gasket for petrochemical engineering pipe flanges, which relates to the technical field of spiral wound gaskets and comprises a flange plate, and a mounting hole is formed in the surface of the flange plate. According to the invention, through the arrangement of the flange plate structure, when the equipment is used, multiple structures such as the racks, the tooth columns and the arc-shaped clamping blocks are matched to move, so that when the equipment is in butt joint installation with the flange plate, the installation positioning can be effectively assisted, and the connection stability can be effectively enhanced, and a gasket does not need to be manually placed between two flanges according to experience; the conditions of position deviation, eccentricity and the like of the gasket are avoided, the problems of poor sealing effect and easy medium leakage caused by non-uniform stress of the gasket and incapability of complete attachment of the sealing surface during subsequent bolt tightening and fixing are prevented, and the problems of equipment displacement, looseness and sealing failure caused by vibration during use can be prevented; the self-adaptive adjustment and stability of the equipment are effectively improved, the maintenance cost of the equipment is effectively reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of spiral wound gaskets, in particular to inner and outer ring spiral wound gaskets for petrochemical pipe flanges. Background Art

[0002] In the process of continuous development of the petrochemical industry, with the expansion of production scale, the increasing complexity of processes, and the continuous improvement of safety production and environmental protection requirements, the pipeline system, as a key carrier for transporting various petrochemical media, has received more and more attention for the sealing performance of the pipe flange connection. In the early days, in the connection of petrochemical pipelines, the gaskets used were relatively simple, mostly flat gaskets made of basic sealing materials such as asbestos and rubber. These flat gaskets mainly use the flexibility and certain elasticity of the material itself to fill the gap between the flanges to achieve the sealing effect. However, with the increasing number of media involved in petrochemical production, including high temperature, high pressure, and various highly corrosive chemicals, and the pipeline operation is also facing frequent temperature changes, vibration and other complex working conditions, simple flat gaskets gradually exposed many problems.

[0003] However, for traditional equipment, most traditional pipe flange gaskets only rely on their own material properties to achieve basic sealing functions. The structure is relatively simple and crude, and lacks effective mechanical structures to assist installation positioning and enhance the stability of the connection. During installation, the gasket is often placed between the two flanges based on manual experience, which is prone to gasket position displacement and eccentricity. This makes the gasket unevenly stressed when it is subsequently tightened and fixed by bolts, and the sealing surface cannot be completely fitted, which leads to poor sealing effect and easy medium leakage problems. It not only affects the normal production, but also may bring safety hazards and cause environmental pollution. Moreover, when traditional gaskets deal with many complex working conditions during pipeline operation, such as temperature changes, internal medium pressure fluctuations, and equipment vibration, they are prone to displacement and loosening due to the lack of corresponding adaptive adjustment and stabilization mechanisms, resulting in sealing failure. Frequent shutdowns for inspection and replacement of gaskets are required, which undoubtedly increases equipment maintenance costs, reduces production efficiency, and brings many inconveniences to the production and operation of enterprises, which need to be improved. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problems raised in the above background technology.

[0005] The present invention adopts the following technical scheme: an inner and outer ring wound gasket for a petrochemical pipe flange comprises a flange plate, a mounting hole is provided on the surface of the flange plate, a flange ring is fixedly installed on the surface of the flange plate, a fixing groove is provided on the surface of the flange ring, an insert ring is fixedly installed on the surface of the flange ring, and a wound gasket body is sleeved on the outer surface of the insert ring.

[0006] Preferably, the surface of the spiral wound gasket body is provided with a slot, the interior of the slot is provided with a moving column, the surface of the moving column is fixedly installed with a rack, the bottom end of the moving column is fixedly installed with a spring 1, the interior of the slot is provided with a tooth column, the rear end of the tooth column is fixedly installed with a worm, the interior of the slot is provided with a worm wheel, the bottom end of the worm wheel is fixedly installed with a rotating rod, the other end of the rotating rod is fixedly installed with a cam, one end of the cam is provided with a groove, the interior of the groove is fixedly provided with a limit rod, the outer surface of the limit rod is provided with a roller, the surface of the spiral wound gasket body is provided with a rotating groove, the surface of the spiral wound gasket body is provided with a moving groove, the interior of the moving groove is provided with a moving rod, the outer surface of the moving rod is provided with a spring 2, one end of the moving rod is fixedly installed with an arc clamping block, the interior of the arc clamping block is provided with a placement groove, and the interior of the placement groove is provided with an extended arc block. Here, the slot provides a movable space for the moving column, in which the moving column can move up and down, and the spring 1 connects the moving column with the interior of the slot to provide a reset elastic force for the moving column. During operation, the moving column can return to its initial position by relying on a spring after being moved by an external force, ensuring the repeatability and stability of a series of transmission operations related thereto, facilitating precise control and multiple operations, laying the foundation for the subsequent movement of other components through the moving column, and ensuring the reliable operation of the entire mechanical transmission structure.

[0007] Preferably, the surface of the spiral wound gasket body is provided with a second fixing groove, an annular tube is placed inside the second fixing groove, a nozzle is fixedly installed on the surface of the annular tube, a nozzle is provided at the other end of the nozzle, an inward concave sheet is fixedly installed inside the first nozzle, a nozzle is provided at the surface of the inward concave sheet, and a sealant is placed inside the annular tube. Here, one end of the nozzle is connected to the annular tube, and the nozzle one at the other end and the inward concave sheet and nozzle two inside it constitute a special glue spraying structure. The nozzle can transport the sealant in the annular tube to the position of nozzle one, and nozzle two on the inward concave sheet further refines and controls the ejection direction and flow rate of the sealant, so that the sealant can be sprayed to the gaps, joints and other parts that need to be sealed in a more precise manner, so as to achieve refined sealing treatment and enhance the sealing effect. The sealant itself is a high temperature resistant and chemical corrosion resistant glue, which can be maintained in the harsh medium environment of petrochemical industry.

[0008] Preferably, one end of the spring 1 is connected and fixed to the bottom surface of the moving column, the other end of the spring 1 is connected and fixed to the inner surface of the slot, one end of the spring 2 is connected and fixed to the inner surface of the moving slot, and the other end of the spring 2 is connected and fixed to the surface of the moving rod. Here, by connecting and fixing the spring 1 to the moving column and the inside of the slot, it is possible to perform buffering when connecting another set of flanges and perform a reset movement when disassembling.

[0009] Preferably, the surface of the rack meshes with the surface of the tooth column, the surface of the worm meshes with the surface of the worm wheel, the surface of the roller contacts the surface of the arc-shaped clamping block, and the cam and the roller are sleeved inside the rotating groove. Here, the surface of the drum contacts the surface of the arc-shaped clamping block. This contact mode enables the cam to convert the rotational motion into a driving force on the arc-shaped clamping block through the roller during the rotation process, and push the arc-shaped clamping block to move linearly along the moving groove, thereby realizing an effective conversion from rotational motion to linear motion. Moreover, since there is rolling contact between the roller and the arc-shaped clamping block, the friction force is greatly reduced compared to direct sliding friction, making the movement of the arc-shaped clamping block smoother and more stable, reducing component wear, improving the efficiency and reliability of the entire transmission link, ensuring that the arc-shaped clamping block can accurately perform clamping and other related operations, and improving the overall performance of the equipment.

[0010] Preferably, the top of the moving column is semicircular, the number of the moving column and the rack are four groups and are distributed circumferentially inside the main body of the wound gasket, the number of the arc clamping blocks and the extended arc blocks are four groups and are distributed circumferentially on the surface of the main body of the wound gasket, and the other end of the arc clamping block is inserted into the interior of the second fixing groove. Here, the number of the moving column and the rack are four groups and are distributed circumferentially inside the main body of the wound gasket. The circumferential distribution makes the transmission of force and the control of movement more uniform and symmetrical, and acts from multiple directions at the same time, ensuring that when the moving column is operated, the transmission structure inside the entire gasket can respond smoothly and evenly, avoiding unstable movement and jamming of components caused by single-point force or unilateral transmission.

[0011] Preferably, the number of the second fixing groove and the annular tube is two groups and they are symmetrically distributed on the surface of the spiral wound gasket body, the number of the nozzle and the nozzle one is multiple groups and they are circumferentially distributed on the surface of the annular tube, and the nozzles are installed on the outer surface and the inner surface of the annular tube. Here, the number of the second fixing groove and the annular tube is two groups and they are symmetrically distributed on the surface of the spiral wound gasket body. The symmetrical distribution design makes the supply of sealant more uniform and balanced, and the sealant is provided to the relevant areas of the gasket from both sides through the annular tube, which can fully cover the parts that need to be sealed, avoid the situation of insufficient local sealing, improve the integrity and reliability of the seal, ensure that good sealing effects can be achieved in different positions and directions of petrochemical pipelines, effectively prevent medium leakage, and ensure the safe and stable operation of the pipeline system.

[0012] Preferably, the number of the concave sheets is multiple groups and they are distributed in a circular pattern inside the nozzle one, the materials of the annular tube and the concave sheets are both soft materials, the insertion ring is inserted inside the fixing groove two, and the sealant is a high temperature resistant and chemical corrosion resistant glue. Here, the insertion ring is inserted inside the fixing groove two, and this insertion and matching method further enhances the connection stability between the spiral wound gasket body and the flange, so that the gasket can be more firmly fixed on the flange after installation, preventing the gasket from shifting or falling off due to vibration, medium impact and other factors during the operation of the pipeline, thereby ensuring the effectiveness of the seal.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are:

[0014] 1. In the present invention, by setting the flange and the mounting hole structure, when the equipment is in use, the rack, the tooth column and the arc-shaped clamping block multiple structures are coordinated and moved, which can effectively assist the installation positioning and enhance the connection stability when docking and installing with the flange. There is no need to rely on manual experience to place the gasket between the two flanges, so as to avoid the gasket position displacement, eccentricity and the like, and prevent the gasket from being unevenly stressed during the subsequent tightening and fixing by bolts, and the sealing surface cannot be completely fitted, which leads to poor sealing effect and easy medium leakage. It can also prevent the equipment from shifting and loosening due to vibration during use, resulting in sealing failure problems, effectively improve the adaptive adjustment and stability of the equipment, effectively reduce the equipment maintenance cost and improve production efficiency.

[0015] 2. In the present invention, by providing a second fixing groove, an annular tube, a nozzle, a first nozzle, an inner concave sheet, a second nozzle, and a sealant structure, by providing a sealant, when the flange is connected and fixed to the surface of the spiral wound gasket body, the connection sealing can be effectively improved. Even in the harsh working conditions of petrochemical pipelines transporting high-temperature media and contacting various corrosive chemicals, good sealing performance can be maintained, effectively resisting the erosion of the sealing part by the medium, extending the service life of the entire sealing structure, and ensuring the safe and stable operation of the pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention provides a three-dimensional structural schematic diagram of an inner and outer ring wound gasket for a petrochemical pipe flange;

[0017] Figure 2 The exploded structural diagram of the inner and outer ring wound gaskets for petrochemical pipe flanges proposed by the present invention is as follows;

[0018] Figure 3 The present invention provides a schematic diagram of the structure of a movable column of inner and outer ring wound gaskets for petrochemical pipe flanges;

[0019] Figure 4The present invention provides a schematic diagram of the structure of an arc-shaped clamping block of inner and outer ring wound gaskets for petrochemical pipe flanges;

[0020] Figure 5 The present invention provides a schematic diagram of the ring-shaped pipe structure of the inner and outer ring wound gasket for the petrochemical pipe flange;

[0021] Figure 6 The present invention proposes an inner and outer ring spiral wound gasket for a petrochemical pipe flange Figure 2 Enlarged view of point A in the middle;

[0022] Figure 7 The present invention proposes an inner and outer ring spiral wound gasket for a petrochemical pipe flange Figure 2 Enlarged view of point B in the middle;

[0023] Figure 8 The present invention proposes an inner and outer ring spiral wound gasket for a petrochemical pipe flange Figure 5 Enlarged view of point C in the middle;

[0024] Fig. 9 The present invention proposes an inner and outer ring spiral wound gasket for a petrochemical pipe flange Figure 5 Enlarged view of point D in the middle.

[0025] Legend:

[0026] 1. Flange; 2. Mounting hole; 3. Flange ring; 4. Fixed groove 1; 5. Insert ring; 6. Wound gasket body; 7. Slot; 8. Moving column; 9. Rack; 10. Spring 1; 11. Tooth column; 12. Worm; 13. Worm wheel; 14. Rotating rod; 15. Cam; 16. Groove; 17. Limit rod; 18. Roller; 19. Rotating groove; 20. Moving groove; 21. Moving rod; 22. Spring 2; 23. Arc clamping block; 24. Placement groove; 25. Extended arc block; 26. Fixed groove 2; 27. Ring tube; 28. Nozzle; 29. ​​Nozzle 1; 30. Concave sheet; 31. Nozzle 2; 32. Sealant. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0029] Embodiment 1

[0030] See also Figure 1-Figure 4 , Figure 6-Figure 7 The present invention provides a technical solution: an inner and outer ring wound gasket for a petrochemical pipe flange, comprising a flange 1, a mounting hole 2 is provided on the surface of the flange 1, a flange ring 3 is fixedly installed on the surface of the flange 1, a fixing groove 4 is provided on the surface of the flange ring 3, an insertion ring 5 is fixedly installed on the surface of the flange ring 3, a wound gasket body 6 is sleeved on the outer surface of the insertion ring 5, a slot 7 is provided on the surface of the wound gasket body 6, a moving column 8 is sleeved inside the slot 7, a rack 9 is fixedly installed on the surface of the moving column 8, a spring 10 is fixedly installed at the bottom end of the moving column 8, a tooth column 11 is sleeved inside the slot 7, a worm 12 is fixedly installed at the rear end of the tooth column 11, and a worm 12 is sleeved inside the slot 7. Wheel 13, a rotating rod 14 is fixedly installed at the bottom end of the worm gear 13, a cam 15 is fixedly installed at the other end of the rotating rod 14, a groove 16 is opened at one end of the cam 15, a limit rod 17 is fixedly installed inside the groove 16, a roller 18 is sleeved on the outer surface of the limit rod 17, a rotating groove 19 is opened on the surface of the wound gasket body 6, a moving groove 20 is opened on the surface of the wound gasket body 6, a moving rod 21 is sleeved inside the moving groove 20, a spring 22 is sleeved on the outer surface of the moving rod 21, an arc-shaped clamping block 23 is fixedly installed at one end of the moving rod 21, a placement groove 24 is opened inside the arc-shaped clamping block 23, and an extension arc block 25 is sleeved inside the placement groove 24. When the equipment is in operation When in use, first the hand contacts the surface of the wound gasket body 6, then the hand contacts the surface of the flange 1, then the flange ring 3 contacts the surface of the moving column 8, then the wound gasket body 6 is pressed, and then the flange ring 3 is moved by the movement of the wound gasket body 6, and then the moving column 8 is moved by the movement of the flange ring 3, and then the rack 9 is moved by the movement of the moving column 8, and then the spring 10 is moved by the movement of the moving column 8, and then the rack 9 is moved to drive the tooth column 11 to rotate, and then the tooth column 11 is rotated to drive the worm 12 to rotate, and then the worm 12 is rotated to drive the worm wheel 13 to rotate, and then the worm wheel 13 is rotated. The rotating rod 14 is driven to rotate, and then the cam 15 is driven to rotate through the rotation of the rotating rod 14, and then the roller 18 is moved through the rotation of the cam 15, and then the arc clamping block 23 is moved through the movement of the roller 18, and then the extension arc block 25 is moved through the movement of the arc clamping block 23, and then the moving rod 21 is moved through the movement of the moving rod 21, and then the spring 22 is contracted, and then the cam 15 is rotated 180 degrees through the moving column 8, and then the surface of the flange ring 3 contacts the surface of the wound gasket body 6, and then the arc clamping block 23 is moved to fix the flange 1.

[0031] See also Figure 1-Figure 9, one end of the spring 10 is connected and fixed to the bottom surface of the moving column 8, the other end of the spring 10 is connected and fixed to the inner surface of the slot 7, one end of the spring 22 is connected and fixed to the inner surface of the moving slot 20, the other end of the spring 22 is connected and fixed to the surface of the moving rod 21, the surface of the rack 9 is meshed with the surface of the tooth column 11, the surface of the worm 12 is meshed with the surface of the worm wheel 13, the surface of the roller 18 is in contact with the surface of the arc clamping block 23, the cam 15 and the roller 18 are sleeved inside the rotating groove 19, the top of the moving column 8 is semicircular, the number of the moving column 8 and the rack 9 are four groups and are distributed in a circle inside the winding gasket body 6, the number of the arc clamping block 23 and the extended arc block 25 are four groups and are distributed in a circle on the surface of the winding gasket body 6, the other end of the arc clamping block 23 is inserted into the fixed groove 26, the fixed groove 26 There are two groups of annular tubes 27, which are symmetrically distributed on the surface of the wound gasket body 6; there are multiple groups of nozzles 28 and nozzles 29, which are circumferentially distributed on the surface of the annular tube 27; nozzles 28 are installed on the outer and inner surfaces of the annular tube 27; there are multiple groups of concave sheets 30, which are circumferentially distributed inside the nozzles 29; the materials of the annular tubes 27 and the concave sheets 30 are both soft materials; the insertion ring 5 is inserted inside the fixing groove 26; the sealant 32 is a high temperature resistant and chemical corrosion resistant glue; the materials of the annular tubes 27 and the concave sheets 30 are both soft materials; the annular tubes 27 made of soft materials can better adapt to the shape changes of the surface of the wound gasket body 6; during installation and use, they can change their own shape accordingly with the deformation and bending of the gasket; they are not prone to cracking, breaking, and other problems, thereby ensuring that the conveying channel of the sealant 32 is stable and reliable. The soft material of the concave sheet 30 enables it to deform appropriately when subjected to the pressure of the sealant 32, which is more conducive to the sealant 32 being sprayed out evenly and smoothly through the nozzle 2 31, and can rely on its own elasticity to restore its original shape when not in use, preventing foreign matter from entering the nozzle and clogging the channel. At the same time, the soft material can also better fit the sealing part, improve the sealing effect, and meet the requirements for the sealing structure in the complex environment of petrochemical industry.

[0032] Embodiment 2

[0033] See also Figure 5 , Figure 8-Figure 9A fixing groove 26 is provided on the surface of the spiral wound gasket body 6, and an annular tube 27 is placed inside the fixing groove 26. A nozzle 28 is fixedly installed on the surface of the annular tube 27, and a nozzle 1 29 is provided at the other end of the nozzle 28. An inward concave sheet 30 is fixedly installed inside the nozzle 1 29, and a nozzle 2 31 is provided on the surface of the inward concave sheet 30. A sealant 32 is placed inside the annular tube 27. When the equipment is in use, the insertion ring 5 is moved by moving the flange 1, and then the annular tube 27 is squeezed by moving the insertion ring 5. The sealant 32 is transported to the nozzle 1 29 through the nozzle 28 on the annular tube 27 through the extrusion of the annular tube 27, and then sprayed out through the nozzle 2 31 on the inward concave sheet 30 inside the nozzle 1 29, so that the sealant 32 is accurately sprayed into the inside of the slot 7, so that the gap connecting the flange 1 and the spiral wound gasket body 6 can be sealed.

[0034] Working principle: When the equipment is used, first the hand contacts the surface of the wound gasket body 6, then the hand contacts the surface of the flange 1, then the flange ring 3 contacts the surface of the moving column 8, then the wound gasket body 6 is pressed, and then the flange ring 3 is moved by the movement of the wound gasket body 6, and then the moving column 8 is moved by the movement of the flange ring 3, and then the rack 9 is moved by the movement of the moving column 8, and then the spring 10 is moved by the movement of the moving column 8, and then the rack 9 is moved to rotate the tooth column 11, and then the tooth column 11 is rotated to rotate the worm 12, and then the worm 12 is rotated to rotate the worm wheel 13, and then the worm wheel 13 is rotated to rotate the rotating rod 14, and then the rotating rod 14 is rotated to rotate the cam 15, and then the cam 15 is rotated to move the roller 18, and then the roller 18 is moved to drive the arc clamping block 23. The arc-shaped clamping block 23 moves, and then the arc-shaped clamping block 23 drives the extending arc-shaped block 25 to move, and then the arc-shaped clamping block 23 drives the moving rod 21 to move, and then the moving rod 21 drives the spring 22 to contract, and then the moving column 8 drives the cam 15 to rotate 180 degrees, and then the surface of the flange ring 3 contacts the surface of the wound gasket body 6, and then the arc-shaped clamping block 23 moves, so that the flange 1 can be fixed, and at the same time, the flange 1 moves to drive the insertion ring 5 to move, and then the insertion ring 5 moves, and it can be inserted in the fixing groove 26 to extrude the annular tube 27, and the sealant 32 is driven by the extrusion of the annular tube 27 to be transported to the nozzle 1 29 through the nozzle 28 on the annular tube 27, and then it is sprayed out through the nozzle 2 31 on the concave thin sheet 30 inside the nozzle 1 29, so that the sealant 32 is accurately sprayed into the slot 7, so that the gap between the flange 1 and the wound gasket body 6 can be sealed.

[0035] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An inner and outer ring spiral wound gasket for a petrochemical pipe flange, comprising a flange plate (1), characterized in that: The surface of the flange (1) is provided with a mounting hole (2), the surface of the flange (1) is fixedly provided with a flange ring (3), the surface of the flange ring (3) is provided with a fixing groove (4), the surface of the flange ring (3) is fixedly provided with an insertion ring (5), and the outer surface of the insertion ring (5) is sleeved with a wound gasket body (6).

2. The inner and outer ring spiral wound gasket for petrochemical pipe flange according to claim 1, characterized in that: The surface of the spiral wound gasket body (6) is provided with a slot (7), a movable column (8) is sleeved inside the slot (7), a rack (9) is fixedly installed on the surface of the movable column (8), a spring (10) is fixedly installed at the bottom end of the movable column (8), a tooth column (11) is sleeved inside the slot (7), a worm (12) is fixedly installed at the rear end of the tooth column (11), a worm wheel (13) is sleeved inside the slot (7), a rotating rod (14) is fixedly installed at the bottom end of the worm wheel (13), a cam (15) is fixedly installed at the other end of the rotating rod (14), and a groove (16) is provided at one end of the cam (15). A limiting rod (17) is fixedly installed inside the groove (16), and a roller (18) is sleeved on the outer surface of the limiting rod (17). A rotating groove (19) is provided on the surface of the wound gasket body (6). A moving groove (20) is provided on the surface of the wound gasket body (6). A moving rod (21) is sleeved inside the moving groove (20), and a spring (22) is sleeved on the outer surface of the moving rod (21). An arc-shaped clamping block (23) is fixedly installed at one end of the moving rod (21), and a placement groove (24) is provided inside the arc-shaped clamping block (23), and an extension arc-shaped block (25) is sleeved inside the placement groove (24).

3. The inner and outer ring spiral wound gasket for petrochemical pipe flange according to claim 1, characterized in that: The surface of the spiral wound gasket body (6) is provided with a second fixing groove (26), an annular tube (27) is placed inside the second fixing groove (26), a nozzle (28) is fixedly installed on the surface of the annular tube (27), a nozzle opening (29) is provided at the other end of the nozzle (28), an inner concave sheet (30) is fixedly installed inside the nozzle opening (29), a second nozzle opening (31) is provided on the surface of the inner concave sheet (30), and a sealant (32) is placed inside the annular tube (27).

4. The inner and outer ring spiral wound gasket for petrochemical pipe flange according to claim 2, characterized in that: One end of the spring one (10) is connected and fixed to the bottom surface of the moving column (8), the other end of the spring one (10) is connected and fixed to the inner surface of the slot (7), one end of the spring two (22) is connected and fixed to the inner surface of the moving slot (20), and the other end of the spring two (22) is connected and fixed to the surface of the moving rod (21).

5. The inner and outer ring spiral wound gasket for petrochemical pipe flange according to claim 2, characterized in that: The surface of the rack (9) meshes with the surface of the tooth column (11), the surface of the worm (12) meshes with the surface of the worm wheel (13), the surface of the roller (18) contacts with the surface of the arc-shaped clamping block (23), and the cam (15) and the roller (18) are sleeved inside the rotating groove (19).

6. The inner and outer ring spiral wound gasket for petrochemical pipe flange according to claim 2, characterized in that: The top of the movable column (8) is semicircular, the movable column (8) and the rack (9) are both in four groups and are distributed in a circular pattern inside the wound gasket body (6), the arc-shaped clamping blocks (23) and the extended arc-shaped blocks (25) are both in four groups and are distributed in a circular pattern on the surface of the wound gasket body (6), and the other end of the arc-shaped clamping block (23) is inserted into the interior of the second fixing groove (26).

7. The inner and outer ring spiral wound gasket for petrochemical pipe flange according to claim 3, characterized in that: The number of the second fixing groove (26) and the annular tube (27) is two groups and they are symmetrically distributed on the surface of the wound gasket body (6); the number of the nozzle (28) and the first nozzle (29) is multiple groups and they are circumferentially distributed on the surface of the annular tube (27); the nozzle (28) is installed on the outer surface and the inner surface of the annular tube (27).

8. The inner and outer ring spiral wound gasket for petrochemical pipe flange according to claim 3, characterized in that: The number of the concave sheets (30) is multiple and they are distributed in a circular pattern inside the nozzle one (29). The materials of the annular tube (27) and the concave sheets (30) are both soft materials. The insertion ring (5) is inserted inside the fixing groove two (26). The sealant (32) is a high temperature resistant and chemical corrosion resistant glue.

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