Butterfly valve with multiple layers of redundant seals

Abstract

The utility model belongs to butterfly valve technical field, and disclose a butterfly valve with multilayer redundant seal, including butterfly valve main part, the surface of butterfly valve main part is equipped with multilayer sealing assembly, multilayer sealing assembly includes the flange of symmetry installation at butterfly valve main part both ends and is arranged in the rubber cover of folding of flange away from butterfly valve main part one side and is used for the inside diameter seal inside diameter ring, friction convex point, tighten groove, the surface of rubber cover of folding is equipped with dismantling replacement assembly, dismantling replacement assembly includes the mounting plate of symmetry installation at rubber cover of folding near flange one side, the utility model has can carry out inside and outside diameter double -layer sealing processing to butterfly valve and pipeline junction, avoid in the conveying process, the junction between both occurs leakage etc.

Description

Technical Field

[0001] This utility model belongs to the field of butterfly valve technology, specifically a butterfly valve with multi-layer redundant sealing. Background Technology

[0002] In modern industrial pipeline transportation systems, butterfly valves, as a type of valve with simple structure, convenient operation, and excellent flow control performance, are widely used in many fields such as petroleum, chemical, water treatment, and power. Their core function is to open, close, and regulate the flow of media within the pipeline through the rotation of the valve disc. Sealing performance, as a key indicator of the butterfly valve's reliability, directly determines the operating efficiency of the pipeline system, the media utilization rate, and the existence of potential safety hazards. In the structure of a butterfly valve, the inner and outer diameter sections are crucial areas for connecting the valve to the pipeline and sealing the internal components. Existing methods cannot reliably seal these areas, making them highly susceptible to leakage during pipeline operation, especially when transporting media with pressure, corrosiveness, or flammable and explosive properties. Such leaks not only waste valuable media and increase production costs for enterprises, but also pollute the surrounding production environment. In severe cases, they may even cause major safety accidents such as fires and explosions, threatening the lives of operators and causing incalculable economic losses and reputational damage to enterprises.

[0003] Therefore, a butterfly valve with multi-layer redundant sealing is proposed to address the above problems. Utility Model Content

[0004] To address the problems mentioned in the background section, this invention provides a butterfly valve with multi-layer redundant sealing. This valve can perform double-layer sealing treatment on both the inner and outer diameters at the connection between the butterfly valve and the pipeline, preventing leakage at the connection during transportation and thus avoiding media leakage and impact on the external environment. This significantly improves the stability of pipeline operation, reduces the occurrence of accidents, and effectively seals the pipeline.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a butterfly valve with multi-layer redundant sealing, comprising a butterfly valve body; The surface of the butterfly valve body is equipped with a multi-layer sealing assembly, which includes flanges symmetrically installed at both ends of the butterfly valve body, a folded rubber cover disposed on the side of the flange away from the butterfly valve body, an inner diameter ring for inner diameter sealing, friction protrusions, and tightening grooves. The surface of the folded rubber cover is equipped with a disassembly and replacement assembly, which includes a mounting plate symmetrically installed on the side of the folded rubber cover near the flange, as well as a mounting groove opened inside the flange and bolts, fixing blocks, and fixing grooves for fixing.

[0006] Preferably, the inner diameter ring is disposed inside the inlet and outlet ends of the butterfly valve body, the tightening groove is formed inside the inner diameter ring, and a plurality of friction protrusions are evenly distributed and installed on the inner diameter of the folded rubber cover in contact with the pipeline.

[0007] Preferably, the width of the tightening groove gradually decreases from the end furthest from the butterfly valve body to the end closest to the butterfly valve body.

[0008] Preferably, the plurality of friction bumps are arranged in a circumferential array around the center point of the folded rubber cover.

[0009] Preferably, the mounting plate is snapped into the interior of the mounting groove, the bolt is threaded into a threaded hole on the surface of the mounting plate, and one end of the bolt passes through the mounting plate and is threaded into a threaded hole on the surface of the flange.

[0010] Preferably, the fixing block is installed on the outer side of the inner diameter ring, the fixing groove is formed inside the butterfly valve body, and the fixing block is riveted to the inside of the fixing groove.

[0011] Preferably, a friction plate is installed on the contact surface between the fixing block and the fixing groove, and the friction plate is in close contact with the fixing groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model employs a multi-layered sealing assembly, including a flange, a folded rubber cover, an inner diameter ring, friction protrusions, and a tightening groove, simultaneously covering both the outer and inner diameters of the butterfly valve to form a double-layered sealing barrier. This significantly reduces the risk of leakage at pipeline connections, making it particularly suitable for scenarios involving the transport of high-pressure, corrosive, or flammable and explosive media, thereby improving system safety and media utilization.

[0013] 2. This utility model achieves a detachable connection between the folding rubber cover and the flange by setting up disassembly and replacement components, such as mounting plates, mounting grooves, and bolts. During subsequent maintenance, the sealing components can be replaced without disassembling the butterfly valve body. This solves the problem of cumbersome and time-consuming maintenance caused by the integrated valve body, shortens downtime for maintenance, and reduces the company's operation and maintenance costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the present invention, including the folding rubber cover and the inner diameter ring; Figure 3 This is a schematic diagram of the structure of the folding rubber cover and friction protrusions of this utility model; Figure 4 This is a schematic diagram of the structure of the inner diameter ring of this utility model; Figure 5 This is a schematic diagram of the installation groove and fixing groove of this utility model.

[0015] In the diagram: 1. Butterfly valve body; 2. Multi-layer sealing assembly; 21. Flange; 22. Folded rubber cover; 23. Inner diameter ring; 24. Friction protrusion; 25. Tightening groove; 3. Disassembly and replacement assembly; 31. Mounting plate; 32. Mounting groove; 33. Bolt; 34. Fixing block; 35. Fixing groove. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figures 1 to 5 As shown, this utility model provides a butterfly valve with multi-layer redundant seals, including a butterfly valve body 1; The surface of the butterfly valve body 1 is equipped with a multi-layer sealing assembly 2. The multi-layer sealing assembly 2 includes flanges 21 symmetrically installed at both ends of the butterfly valve body 1, a folded rubber cover 22 disposed on the side of the flange 21 away from the butterfly valve body 1, an inner diameter ring 23 for inner diameter sealing, friction protrusions 24, and tightening grooves 25. An inner diameter ring 23 is installed inside the inlet and outlet ends of the butterfly valve body 1. A tightening groove 25 is formed inside the inner diameter ring 23. Multiple friction protrusions 24 are evenly distributed and installed on the inner diameter of the folded rubber cover 22 where it contacts the pipeline. The flange 21, folded rubber cover 22, inner diameter ring 23, friction protrusions 24, and tightening groove 25 simultaneously cover both the outer and inner diameters of the butterfly valve, forming a double sealing line of defense. This significantly reduces the risk of leakage at pipeline connections, and is especially suitable for scenarios involving the transportation of high-pressure, corrosive, or flammable and explosive media, improving system safety and media utilization.

[0018] The width of the groove 25 gradually decreases from the end away from the butterfly valve body 1 to the end closer to the butterfly valve body 1. When the pipe is inserted into the inner diameter ring 23, the outer wall of the pipe will squeeze the inner wall of the groove 25. The groove's gradual change structure causes the inner diameter ring 23 to generate a radial tightening force toward the center of the pipe, and the deeper the insertion depth, the greater the tightening force.

[0019] Multiple friction protrusions 24 are arranged in a circular array around the center point of the folded rubber cover 22. When in contact with the outer wall of the pipe, they can form a uniform friction force and compression sealing force in the entire circumference of the pipe, avoiding pipe loosening or local sealing failure due to insufficient local friction. It is especially suitable for circular pipes, ensuring that there are no dead corners in the circumferential seal of the pipe and improving the overall sealing stability.

[0020] The surface of the folding rubber cover 22 is equipped with a disassembly and replacement assembly 3. The disassembly and replacement assembly 3 includes a mounting plate 31 symmetrically installed on the side of the folding rubber cover 22 near the flange 21, a mounting groove 32 opened inside the flange 21, and bolts 33, fixing blocks 34, and fixing grooves 35 for fixing. Mounting plate 31 is snapped into the interior of mounting groove 32. Bolt 33 is threaded into the threaded hole on the surface of mounting plate 31, and one end of bolt 33 passes through mounting plate 31 and is threaded into the threaded hole on the surface of flange 21. The structure of mounting plate 31, mounting groove 32, bolt 33 and so on realizes the detachable connection between folding rubber cover 22 and flange 21. During subsequent maintenance, the sealing components can be replaced without disassembling the butterfly valve body 1. This reduces the cumbersome and time-consuming maintenance caused by the integrated valve body, shortens downtime maintenance time, and reduces the company's operation and maintenance costs.

[0021] The fixing block 34 is installed on the outer side of the inner diameter ring 23, and the fixing groove 35 is opened inside the butterfly valve body 1. The fixing block 34 is riveted to the inside of the fixing groove 35, which can ensure that the inner diameter ring 23 does not shift or fall off when subjected to pipeline compression and medium pressure for a long time, thus ensuring the long-term effectiveness of the inner diameter seal.

[0022] Friction plates are installed on the contact surfaces of the fixing block 34 and the fixing groove 35, and the friction plates are tightly fitted to the fixing groove 35. The friction plates on the contact surfaces of the fixing block 34 and the fixing groove 35 can significantly increase the frictional resistance between them.

[0023] Among them, the structure of butterfly valve body 1 is existing technology, and its working principle is a well-known technology. The appropriate model is selected according to the actual use.

[0024] Working principle and process: First, align the inner diameter ring 23 with the inner side of the inlet and outlet ends of the butterfly valve body 1, so that the fixing block 34 on the outer side of the inner diameter ring 23 is aligned with the fixing groove 35 inside the butterfly valve body 1. Then, rivet the fixing block 34 into the fixing groove 35. Since the contact surface between the fixing block 34 and the fixing groove 35 is equipped with friction plates, after riveting, the friction plates fit tightly with the fixing groove 35, which can not only prevent the inner diameter ring 23 from shifting during subsequent operation, but also further enhance the initial sealing effect of the inner diameter through the friction plates. At the same time, the tightening groove 25 (the groove width gradually decreases from the end away from the butterfly valve body 1 to the end closer to the inner diameter ring 23) is also pre-installed, preparing for the radial tightening seal during subsequent pipeline connection. Take the folded rubber cover 22, align the mounting plate 31 on the side closest to the flange 21 with the mounting groove 32 inside the flange 21, and insert the mounting plate 31 into the mounting groove 32. Next, pass the bolt 33 through the threaded hole on the surface of the mounting plate 31 and thread it into the corresponding threaded hole on the surface of the flange 21. Tighten the bolt 33 to fix the mounting plate 31 to the flange 21, thus completing the assembly of the folded rubber cover 22 and the flange 21. At this time, the friction protrusions 24 evenly distributed on the inner diameter of the folded rubber cover 22 (distributed in a circumferential array around the center point of the folded rubber cover 22) are in a ready-to-contact state. When connected to the pipeline later, friction can enhance the sealing stability. When the butterfly valve body 1 is connected to an external pipeline, the pipeline end is inserted into the inner diameter ring 23 at the inlet and outlet of the butterfly valve body 1. As the pipeline is inserted, the tightening groove 25 inside the inner diameter ring 23 generates a radial tightening force under the squeezing action of the outer wall of the pipeline due to the gradually changing groove structure. This causes the inner diameter ring 23 to tightly wrap around the outer wall of the pipeline, forming the first inner diameter sealing defense line. At the same time, the friction protrusions 24 on the inner diameter of the folded rubber cover 22 are in direct contact with the outer wall of the pipeline. The circumferentially distributed protrusions not only increase the friction area with the pipeline and prevent the pipeline from loosening under the pressure of the medium flow, but the folded rubber cover 22 also wraps around the outside of the pipeline, forming the second outer diameter sealing defense line. When the folding rubber cover 22 needs to be replaced due to aging and wear after long-term use, first unscrew the bolts 33 connecting the mounting plate 31 and the flange 21, remove the bolts 33 from the threaded holes of the mounting plate 31, and then pull the mounting plate 31 out of the mounting groove 32 of the flange 21 to remove the old folding rubber cover 22; when replacing the new folding rubber cover 22, repeat the above steps to complete the replacement. The whole process does not require disassembling the butterfly valve body 1, which greatly shortens the maintenance time. If the inner diameter ring 23 loses its sealing effect due to corrosion or wear, the riveting point between the fixing block 34 and the fixing groove 35 must be destroyed first, and the old inner diameter ring 23 must be removed. After replacing the new inner diameter ring 23, the fixing block 34 should be re-aligned with the fixing groove 35 and riveted to ensure that the friction plate and the fixing groove 35 fit tightly together, thus restoring the inner diameter sealing function. Because the connection structure between the fixing block 34 and the fixing groove 35 is simple, the replacement process does not require professional and complex tools, reducing maintenance difficulty and cost.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A butterfly valve with multi-layer redundant seals, comprising a butterfly valve body (1); Its features are: The surface of the butterfly valve body (1) is equipped with a multi-layer sealing assembly (2). The multi-layer sealing assembly (2) includes flanges (21) symmetrically installed at both ends of the butterfly valve body (1), a folded rubber cover (22) disposed on the side of the flange (21) away from the butterfly valve body (1), and an inner diameter ring (23), friction protrusions (24), and tightening groove (25) for inner diameter sealing. The surface of the folded rubber cover (22) is equipped with a disassembly and replacement assembly (3). The disassembly and replacement assembly (3) includes a mounting plate (31) symmetrically mounted on the side of the folded rubber cover (22) near the flange (21), a mounting groove (32) opened inside the flange (21), and bolts (33), fixing blocks (34), and fixing grooves (35) for fixing.

2. The butterfly valve with multi-layer redundant sealing according to claim 1, characterized in that: The inner diameter ring (23) is located inside the inlet and outlet of the butterfly valve body (1), the tightening groove (25) is opened inside the inner diameter ring (23), and a plurality of friction protrusions (24) are evenly distributed and installed on the inner diameter of the folded rubber cover (22) in contact with the pipeline.

3. A butterfly valve with multi-layer redundant sealing according to claim 1, characterized in that: The width of the tightening groove (25) gradually decreases from the end away from the butterfly valve body (1) to the end closer to the butterfly valve body (1).

4. A butterfly valve with multi-layer redundant sealing according to claim 1, characterized in that: The multiple friction bumps (24) are arranged in a circular array around the center point of the folded rubber cover (22).

5. A butterfly valve with multi-layer redundant sealing according to claim 2, characterized in that: The mounting plate (31) is snapped into the interior of the mounting groove (32), and the bolt (33) is threaded into the threaded hole opened on the surface of the mounting plate (31). One end of the bolt (33) passes through the mounting plate (31) and is threaded into the threaded hole opened on the surface of the flange (21).

6. A butterfly valve with multi-layer redundant sealing according to claim 1, characterized in that: The fixing block (34) is installed on the outer side of the inner diameter ring (23), the fixing groove (35) is opened inside the butterfly valve body (1), and the fixing block (34) is riveted to the inside of the fixing groove (35).

7. A butterfly valve with multi-layer redundant sealing according to claim 1, characterized in that: Friction pads are installed on the contact surfaces of the fixing block (34) and the fixing groove (35), and the friction pads are in close contact with the fixing groove (35).

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