Auxiliary protection device for sealing surface of butterfly valve

Abstract

The utility model discloses a butterfly valve sealing surface auxiliary protection device, which comprises a butterfly valve main body, the inner wall of the butterfly valve main body is fixedly connected with two protection sleeve assemblies, the outer surface of each protection sleeve assembly is fixedly connected with a buffer piece, each protection sleeve assembly comprises a semi-ring sleeve arranged in the butterfly valve main body, and the semi-ring sleeve is fixedly connected with the inner wall of the butterfly valve main body. The outer surfaces of the semi-ring sleeves are fixedly connected with a main protection sleeve and an auxiliary protection sleeve respectively. According to the device, the main protective sleeve and the auxiliary protective sleeve of the protective sleeve assembly can directly prevent a medium from scouring and abrading the sealing face of the butterfly valve, scraping of particle impurities to the sealing face is reduced, the buffer spring in the buffer piece can absorb stress generated by pressure fluctuation and impact of fluid in a pipeline, fatigue damage to the sealing face is reduced, and the service life of the butterfly valve is prolonged. And a sealing gap can be filled through the sealing rubber ring on the outer surface of the auxiliary protecting sleeve, the sealing effect of the butterfly valve is enhanced, medium leakage is effectively prevented, and the sealing performance can be enhanced.

Description

Technical Field

[0001] This utility model relates to the field of valve auxiliary equipment, and in particular to an auxiliary protection device for the sealing surface of a butterfly valve. Background Technology

[0002] Valves are control components in fluid transport systems, with functions such as shut-off, regulation, flow guidance, backflow prevention, pressure stabilization, flow diversion, or overflow pressure relief. Valves used in fluid control systems, such as butterfly valves, have their sealing surface located between the butterfly plate and the valve seat. When the butterfly valve is closed, the butterfly plate rotates around its axis to make tight contact with the valve seat, thereby achieving a seal. The position and design of the sealing surface have a significant impact on the sealing performance of the butterfly valve.

[0003] As an important control component, the performance of the sealing surface of a butterfly valve directly affects its sealing performance, reliability, and service life. However, existing butterfly valves face many problems in actual use. During frequent opening and closing, the sealing surface of the butterfly valve is easily eroded and worn by the medium. Especially when conveying media containing particulate impurities, the sealing surface can be scratched by particles, resulting in scratches and pits on the surface, which in turn reduces the sealing performance and causes media leakage. To address these issues, we propose an auxiliary protection device for the sealing surface of butterfly valves. Utility Model Content

[0004] The purpose of this invention is to provide an auxiliary protection device for the sealing surface of a butterfly valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An auxiliary protection device for the sealing surface of a butterfly valve includes a butterfly valve body. Two protective sleeve assemblies are fixedly connected to the inner wall of the butterfly valve body. A buffer is fixedly connected to the outer surface of each protective sleeve assembly. The protective sleeve assembly includes a semi-ring sleeve disposed inside the butterfly valve body. A main protective sleeve and a secondary protective sleeve are fixedly connected to the outer surface of the semi-ring sleeve respectively.

[0007] In a further embodiment, the outer surfaces of the main protective sleeve and the secondary protective sleeve are jointly fixedly connected with multiple reinforcing plates.

[0008] In a further embodiment, a sealing rubber ring is fixedly connected to the outer surface of each of the sub-protective sleeves.

[0009] In a further embodiment, a plurality of mounting plates are fixedly connected to the inner wall of the butterfly valve body, and each mounting plate has mounting nails on its outer surface.

[0010] In a further embodiment, the buffer includes a buffer sleeve fixedly installed on the outer surface of the semi-ring, and a plurality of buffer springs are fixedly connected to the inner wall of the buffer sleeve.

[0011] In a further embodiment, the outer surfaces of the main protective sleeve, the secondary protective sleeve, and the semi-ring sleeve are all provided with anti-corrosion coatings.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This device, through the main and auxiliary protective sleeves of the protective sleeve assembly, can directly block the scouring and wear of the media on the sealing surface of the butterfly valve, reducing the scraping of the sealing surface by particulate impurities. The buffer spring in the buffer component can absorb the stress generated by the pressure fluctuation and impact of the fluid in the pipeline, reducing the fatigue damage to the sealing surface and extending the service life of the butterfly valve. The sealing rubber ring on the outer surface of the auxiliary protective sleeve can fill the sealing gap, enhance the sealing effect of the butterfly valve, effectively prevent media leakage, and enhance sealing performance. The anti-corrosion coating on the surface of the main protective sleeve, auxiliary protective sleeve, and semi-ring sleeve can resist the erosion of the sealing surface by corrosive media and maintain the integrity of the sealing structure. Attached Figure Description

[0014] Figure 1 A frontal three-dimensional schematic diagram of an auxiliary protection device for the sealing surface of a butterfly valve;

[0015] Figure 2 This is a partial structural diagram of the protective sleeve assembly in the auxiliary protection device for the sealing surface of a butterfly valve.

[0016] Figure 3 A schematic diagram of the internal structure of the buffer component in the auxiliary protection device for the sealing surface of a butterfly valve;

[0017] Figure 4 This is a schematic diagram of the protective sleeve assembly and buffer component in the auxiliary protection device for the sealing surface of a butterfly valve.

[0018] In the diagram: 1. Butterfly valve body; 2. Protective sleeve assembly; 3. Mounting plate; 4. Mounting pin; 5. Main protective sleeve; 6. Secondary protective sleeve; 7. Reinforcing plate; 8. Buffer component; 801. Buffer sleeve; 802. Buffer spring; 9. Semi-ring sleeve; 10. Sealing rubber ring. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] 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.

[0022] Please see Figure 1-4 In this utility model, an auxiliary protection device for the sealing surface of a butterfly valve includes a butterfly valve body 1. Two protective sleeve assemblies 2 are fixedly connected to the inner wall of the butterfly valve body 1. Each protective sleeve assembly 2 has a buffer member 8 fixedly connected to its outer surface. The protective sleeve assembly 2 includes a semi-ring sleeve 9 disposed inside the butterfly valve body 1. A main protective sleeve 5 and a secondary protective sleeve 6 are fixedly connected to the outer surface of the semi-ring sleeve 9. The protective sleeve assembly 2, as the main protective component, directly protects the sealing surface of the butterfly valve. The buffer member 8 can absorb external stress and reduce damage to the sealing surface. The protective sleeve assembly 2, composed of the semi-ring sleeve 9, the main protective sleeve 5, and the secondary protective sleeve 6, provides protection for the sealing surface from multiple angles.

[0023] Multiple reinforcing plates 7 are fixedly connected to the outer surfaces of the main protective sleeve 5 and the auxiliary protective sleeve 6. The reinforcing plates 7 enhance the structural strength of the main protective sleeve 5 and the auxiliary protective sleeve 6, enabling the protective sleeves to maintain their shape stability and prevent deformation when subjected to medium pressure and impact. This provides continuous and effective protection for the butterfly valve sealing surface. Example: When the butterfly valve is in use, the main protective sleeve 5 and the auxiliary protective sleeve 6 will be subjected to significant pressure. The reinforcing plates 7 connect the main protective sleeve 5 and the auxiliary protective sleeve 6 into a whole, dispersing the pressure and preventing local deformation of the protective sleeves. Even under frequent high-pressure impacts, the protective sleeves can still fit tightly against the butterfly valve sealing surface and perform their protective function.

[0024] Each auxiliary protective sleeve 6 has a sealing rubber ring 10 fixedly connected to its outer surface. The sealing rubber ring 10 has good elasticity and sealing performance, which can fill the small gap between the butterfly valve sealing surface and the protective sleeve, enhance the sealing performance of the butterfly valve, and effectively prevent media leakage. It is especially suitable for working conditions with high sealing requirements. Multiple mounting plates 3 are fixedly connected to the inner wall of the butterfly valve body 1. Each mounting plate 3 has a mounting nail 4 on its outer surface. The mounting plates 3 and mounting nails 4 provide a stable installation method for the protective sleeve assembly 2, ensuring that the protective sleeve is firmly fixed to the inner wall of the butterfly valve body 1. During the long-term operation of the butterfly valve, there will be no loosening or falling off, ensuring that the protective device continues to function and will not be displaced due to vibration or media impact. The buffer component 8 includes a buffer sleeve 801 fixedly installed on the outer surface of the semi-ring sleeve 9. Multiple buffer springs 802 are fixedly connected to the inner wall of the buffer sleeve 801. The buffer sleeve 801 and the buffer springs 802 of the buffer component 8 cooperate. It can effectively absorb the pressure fluctuations and impacts of fluid in the pipeline, as well as the stress generated during the opening and closing of the butterfly valve, reducing the impact of these external forces on the sealing surface of the butterfly valve and lowering the risk of fatigue damage to the sealing surface. Example: Pressure changes in the pipeline are transmitted to the butterfly valve. At this time, the buffer spring 802 is compressed under pressure, converting the pressure into the elastic potential energy of the spring. The buffer sleeve 801 restricts the deformation direction of the spring, so that the stress does not act directly on the sealing surface of the butterfly valve, protecting the sealing surface from damage. The outer surfaces of the main protective sleeve 5, the auxiliary protective sleeve 6, and the semi-ring sleeve 9 are all provided with anti-corrosion coatings. The coating material can be a nano-composite anti-corrosion coating, which has good corrosion resistance and can resist the erosion of corrosive media such as acids, alkalis, and salt spray. It can effectively isolate the contact between corrosive media and the protective sleeve and the sealing surface of the butterfly valve, prevent the protective sleeve and the sealing surface from being corroded, extend the service life of the butterfly valve and its protective device, and reduce maintenance costs.

[0025] The working principle of this utility model is as follows:

[0026] The protective sleeve assembly 2 is securely installed inside the butterfly valve body 1 by mounting plate 3 and mounting nail 4 to prevent the protective device from falling off during use. During use, the main protective sleeve 5 and the auxiliary protective sleeve 6 block sand and gravel particles from directly scouring the butterfly valve sealing surface, reducing the scratch damage to the sealing surface caused by particles. When the water pressure in the pipeline changes suddenly, the buffer spring 802 of the buffer component 8 is compressed and deformed to absorb the stress generated by the pressure fluctuation, preventing the sealing surface from being damaged due to stress concentration. In addition, the sealing rubber ring 10 on the outer surface of the auxiliary protective sleeve 6 fits tightly with the butterfly valve sealing surface, filling any gaps and preventing leakage.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An auxiliary protection device for the sealing surface of a butterfly valve, characterized in that: The device includes a butterfly valve body (1), and two protective sleeve assemblies (2) are fixedly connected to the inner wall of the butterfly valve body (1). Each protective sleeve assembly (2) has a buffer (8) fixedly connected to its outer surface. The protective sleeve assembly (2) includes a semi-ring sleeve (9) disposed inside the butterfly valve body (1). The outer surface of the semi-ring sleeve (9) is fixedly connected to a main protective sleeve (5) and a secondary protective sleeve (6).

2. The auxiliary protection device for the sealing surface of a butterfly valve according to claim 1, characterized in that: The outer surface of the main protective sleeve (5) and the outer surface of the secondary protective sleeve (6) are jointly fixedly connected with multiple reinforcing plates (7).

3. The auxiliary protection device for the sealing surface of a butterfly valve according to claim 1, characterized in that: Each of the sub-protective sleeves (6) has a sealing rubber ring (10) fixedly connected to its outer surface.

4. The auxiliary protection device for the sealing surface of a butterfly valve according to claim 1, characterized in that: The inner wall of the butterfly valve body (1) is fixedly connected with multiple mounting plates (3), and each mounting plate (3) has mounting nails (4) on its outer surface.

5. The auxiliary protection device for the sealing surface of a butterfly valve according to claim 1, characterized in that: The buffer (8) includes a buffer sleeve (801) fixedly installed on the outer surface of the semi-ring sleeve (9), and a plurality of buffer springs (802) are fixedly connected to the inner wall of the buffer sleeve (801).

6. The auxiliary protection device for the sealing surface of a butterfly valve according to claim 1, characterized in that: The outer surfaces of the main protective sleeve (5), the secondary protective sleeve (6), and the semi-ring sleeve (9) are all provided with anti-corrosion coatings.

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