Fireproof soft sealing butterfly valve structure

Abstract

The utility model relates to a fireproof type soft sealing butterfly valve structure which comprises a valve body, a butterfly plate, a pressing plate and a sealing structure arranged on the valve body, and the sealing structure comprises a sealing ring arranged at the intersection of the valve body, the butterfly plate and the pressing plate, the sealing ring and the butterfly plate are in interference sealing so that the sealing performance of the fireproof soft sealing butterfly valve structure can be achieved. The fireproof sealing seat is a long-strip-shaped and high-temperature-resistant elastic component, is arranged between the sealing ring and the pressing plate and is matched with the sealing ring in outline shape, and the fireproof sealing seat and the butterfly plate are in interference sealing so that the sealing performance of the fireproof type soft sealing butterfly valve structure can be achieved. The sealing structure and material of the butterfly valve are optimized, so that the butterfly valve can still keep good sealing performance in a high-temperature or fire environment, medium leakage is prevented, safe operation of a fluid pipeline is ensured, and the butterfly valve has the advantages of being good in sealing effect, long in service life, simple in structure, easy to assemble and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valve soft seal, in particular to a fireproof soft seal butterfly valve structure. Background Art

[0002] As a common valve type, soft-sealed butterfly valves are widely used in various fluid pipeline systems. However, traditional soft-sealed butterfly valves have shortcomings in fire resistance, especially in high-temperature fire environments. Their sealing performance is often seriously affected, resulting in media leakage and even safety accidents.

[0003] At present, there are some soft-sealed butterfly valve products on the market that have been improved for fireproof performance, but most of them have problems such as complex structure, high manufacturing cost, unstable sealing effect, etc. Therefore, it is an urgent problem to provide a soft-sealed butterfly valve structure with simple structure, low manufacturing cost and good fireproof sealing performance, which is of great significance to improving the safety and reliability of pipeline systems.

[0004] It is to be understood that the above statements merely provide background technology related to the present invention and do not necessarily constitute prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a fireproof soft-sealed butterfly valve structure to solve the deficiencies of existing soft-sealed butterfly valves in fireproof performance, and to optimize the sealing structure and material of the butterfly valve so that it can still maintain good sealing performance in high temperature or fire environment, prevent medium leakage, and ensure the safe operation of the fluid pipeline.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a fireproof soft-sealed butterfly valve structure, including a valve body, a butterfly plate, a pressure plate and a sealing structure arranged on the valve body, the sealing structure comprising: a sealing ring, arranged at the intersection of the valve body, the butterfly plate and the pressure plate, an interference seal between the sealing ring and the butterfly plate to achieve the sealing of the fireproof soft-sealed butterfly valve structure; and a fireproof sealing seat, which is an elongated and high-temperature resistant elastic component, arranged between the sealing ring and the pressure plate, matching the contour shape of the sealing ring, an interference seal between the fireproof sealing seat and the butterfly plate to achieve the sealing of the fireproof soft-sealed butterfly valve structure.

[0007] Wherein, a fluid channel is arranged in the valve body, the butterfly plate is arranged in the fluid channel and the butterfly plate can rotate in the valve body to open or seal the fluid channel, and the pressure plate is movably connected to the valve body to press the sealing structure against the butterfly plate when the fluid channel is sealed.

[0008] Preferably, when the sealing ring is in a normal state, sealing is achieved by relying on the interference between the sealing ring and the butterfly plate, and / or between the fireproof sealing seat and the butterfly plate.

[0009] Preferably, when the sealing ring is in a damaged state, sealing is achieved by relying on the interference fit between the fireproof sealing seat and the butterfly plate.

[0010] Preferably, the fireproof sealing seat is in a multi-section curved shape.

[0011] Preferably, the fireproof sealing seat is a nickel-based high-temperature alloy with a high temperature resistance range of 650-700°C.

[0012] Furthermore, a gap is provided between the valve body and the pressure plate, and the tail end of the fireproof sealing seat is fixed in the gap.

[0013] Furthermore, the fireproof soft-sealing butterfly valve structure also includes a gasket, which is arranged between the fireproof sealing seat and the valve body, and between the fireproof sealing seat and the pressure plate.

[0014] Furthermore, the fireproof soft-sealed butterfly valve structure also includes a retaining ring, which is an elastic structure and is arranged on the valve body, and a groove matching the retaining ring is arranged on the pressure plate.

[0015] Wherein, the retaining ring is embedded in a groove arranged on the pressure plate to connect the pressure plate and the valve body.

[0016] Preferably, the sealing ring is made of polytetrafluoroethylene, and its high temperature resistance range is 180-250°C.

[0017] In summary, compared with the prior art, the fireproof soft-sealed butterfly valve structure of the utility model has the following beneficial effects:

[0018] (1) The fireproof performance of the soft-seal butterfly valve is improved, so that it can still maintain a good sealing effect in high temperature or fire environment to prevent medium leakage;

[0019] (2) Ensure the sealing performance and service life of the fireproof soft-sealed butterfly valve under normal operating conditions;

[0020] (3) Simplify the sealing structure of the fireproof soft-seal butterfly valve, reduce manufacturing costs and improve production efficiency;

[0021] (4) Low maintenance cost of fireproof soft seal butterfly valve, easy for users to use and manage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the vertical cross-section structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the transverse cross-sectional structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the overall structure of the valve of the utility model;

[0025] Figure 4 This is a sealing schematic diagram of the utility model when the sealing ring is in a good condition;

[0026] Figure 5 This is a sealing schematic diagram of the utility model when the sealing ring is damaged;

[0027] Figure 6 This is a sealing schematic diagram when the sealing ring of the utility model is completely damaged;

[0028] Figure 7 It is a schematic diagram of the specific structure of the fireproof sealing seat of the utility model. DETAILED DESCRIPTION

[0029] The following will be combined with the appended examples in the present utility model Figure 1 ~Attached Figure 7 , the technical scheme, structural features, objectives achieved and effects in the embodiments of the utility model are described in detail.

[0030] It should be noted that the drawings are in a very simplified form and use non-precise proportions. They are only used to conveniently and clearly assist in explaining the implementation methods of the utility model, and are not used to limit the conditions for the implementation of the utility model. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed by the utility model without affecting the efficacy and purpose that can be achieved by the utility model.

[0031] It should be noted that, in the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only the elements explicitly listed, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] like Figure 1 , Figure 2 and Figure 3As shown, the utility model provides a fireproof soft-sealed butterfly valve structure, comprising a valve body 1, a butterfly plate 2, a pressure plate 3 and a sealing structure arranged on the valve body 1, wherein a fluid channel is arranged in the valve body 1, the butterfly plate 2 is arranged in the fluid channel and the butterfly plate 2 can rotate in the valve body 1 to open or seal the fluid channel; the pressure plate 3 is movably connected to the valve body 1, and is used to press the sealing structure against the butterfly plate 2 when the fluid channel is sealed; wherein the sealing structure comprises: a sealing ring 4, which is arranged in the valve At the intersection of the body 1, the butterfly plate 2 and the pressure plate 3, the sealing ring 4 and the butterfly plate 2 are sealed by an interference fit to ensure the sealing of the fire-proof soft-sealed butterfly valve structure; and the fire-proof sealing seat 5 is an elongated and high-temperature resistant elastic component with a high-temperature resistance range of 650-700°C, which is arranged between the sealing ring 4 and the pressure plate 3 and matches the contour shape of the sealing ring 4. The fire-proof sealing seat 5 and the butterfly plate 2 are sealed by an interference fit to ensure the sealing of the fire-proof soft-sealed butterfly valve structure.

[0033] Further, such as Figure 1 As shown, when the sealing ring 4 is in normal working condition, the sealing performance of the fireproof soft sealing butterfly valve structure can be guaranteed only by the interference fit sealing between the sealing ring 4 and the butterfly plate 2 at point A.

[0034] It is understandable that at this time, there is no need to consider the state of the fireproof sealing seat 5. Figure 4 As shown, when the sealing interference between the sealing ring 4 and the butterfly plate 2 at point A is large, a large lateral extrusion can be generated on the fireproof sealing seat 5, resulting in the top end of the fireproof sealing seat 5 not contacting the butterfly plate 2 at point B; however, if the sealing interference between the sealing ring 4 and the butterfly plate 2 at point A can ensure the sealing performance of the fireproof soft sealing butterfly valve structure but is not sufficient to generate a large lateral extrusion on the fireproof sealing seat 5, the top end of the fireproof sealing seat 5 may contact the butterfly plate 2 at point B.

[0035] Further, such as Figure 5 and Figure 6 As shown, when the sealing ring 4 is damaged, there is no sealing interference between the sealing ring 4 and the butterfly plate 2 at point A or the sealing interference cannot maintain the sealing performance of the fireproof soft sealing butterfly valve structure. At this time, the lateral extrusion of the sealing ring 4 on the fireproof sealing seat 5 disappears, and the fireproof sealing seat 5 undergoes elastic deformation, so that its top end is in close contact with the butterfly plate 2 at point B, and after the two are in contact at point B, the fireproof sealing seat 5 still has a certain elastic potential energy, thereby the fireproof sealing seat 5 and the butterfly plate 2 are sealed at point B through elastic potential energy interference to achieve the sealing of the butterfly valve structure.

[0036] Exemplarily, the conditions under which the sealing ring 4 cannot maintain the sealing performance due to damage are: the sealing ring 4 is damaged due to high temperature, and / or the sealing ring 4 is corroded due to long-term use, etc.

[0037] Further, such as Figure 4 As shown, when the sealing ring 4 is damaged and cannot maintain the sealing performance of the fireproof soft-sealing butterfly valve structure, if the fireproof sealing seat 5 is not provided at this time, the butterfly plate 2 will not be able to form an effective seal with the valve body 1 and the pressure plate 3 at both point A and point B, so that the fireproof soft-sealing butterfly valve structure does not have sealing performance.

[0038] Further, such as Figure 7 As shown, the fireproof sealing seat 5 is in a multi-section curved shape, and can store elastic potential energy by deforming the curved portion. Specifically, the curved portion of the fireproof sealing seat 5 has undergone a certain plastic deformation, and its internal structure is looser than the unbent portion, and slip and displacement between grains are more likely to occur. Therefore, the curved portion will more easily continue to deform when subjected to force.

[0039] Further, such as Figure 1 As shown, a gap 8 is provided between the valve body 1 and the pressure plate 3, and the tail end of the fireproof sealing seat 5 can be clamped in the gap 8, so as to achieve the purpose of fixing the fireproof sealing seat 5 in any state.

[0040] Further, such as Figure 1 and Figure 2 As shown, the fireproof soft-sealed butterfly valve structure further includes a gasket 6. In one embodiment of the utility model, the gasket 6 is arranged all over the inner wall of the slit 8, and the fireproof sealing seat 5 is placed on the gasket 6, so as to avoid direct contact between the fireproof sealing seat 5 and the valve body 1 and the pressure plate 3 on both sides of the slit 8 while playing a sealing role. In another embodiment of the utility model, the gasket 6 is composed of two pieces, one piece is arranged on the side wall of the slit between the valve body 1 and the fireproof sealing seat 5, and the other piece is arranged on the side wall of the slit between the pressure plate 3 and the fireproof sealing seat 5, so as to avoid direct contact between the fireproof sealing seat 5 and the valve body 1 and the pressure plate 3 on both sides of the slit while playing a sealing role.

[0041] Further, such as Figure 1As shown, the fireproof soft-sealed butterfly valve structure also includes a retaining ring 7, which is an elastic structure and is arranged on the valve body 1, and a groove matching the retaining ring 7 is arranged on the pressure plate 3; during installation, the retaining ring 7 is embedded in the groove arranged on the pressure plate 3, so that the pressure plate 3 is connected to the valve body 1 to fix the pressure plate 3 and limit its left and right movement. Specifically, the retaining ring 7 is equivalent to playing the role of a bolt, but due to the small diameter of the valve, the bolt fixing method will occupy a large space, so the retaining ring 7 is used to fix the pressure plate 3 on the valve body 1. This method requires less space and is more in line with the requirements of a small and compact valve.

[0042] Exemplarily, in a preferred embodiment of the present utility model, the retaining ring 7 is a retaining spring.

[0043] More specifically, in a preferred embodiment of the utility model, the valve body 1, the butterfly plate 2 and the pressure plate 3 are made of high temperature resistant and corrosion resistant materials, such as stainless steel; the sealing ring 4 is made of a high temperature resistant and chemically stable polymer material, such as polytetrafluoroethylene, with a high temperature resistance range of 180-250°C; the gasket 6 is made of a material that is resistant to high temperature, wear-resistant and has good chemical stability, such as graphite.

[0044] Optionally, in a preferred embodiment of the present utility model, the fireproof sealing seat 5 is made of a nickel-based high-temperature alloy.

[0045] To sum up, the utility model is a fireproof soft-sealed butterfly valve structure, which optimizes the sealing structure and material of the butterfly valve so that it can still maintain good sealing performance in high temperature or fire environment, prevent medium leakage, ensure the safe operation of the fluid pipeline, and has the advantages of good sealing effect, long service life, simple structure and easy assembly.

[0046] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A fireproof soft-sealed butterfly valve structure, comprising a valve body, a butterfly plate, a pressure plate and a sealing structure arranged on the valve body, characterized in that: The sealing structure comprises: A sealing ring is arranged at the intersection of the valve body, the butterfly plate and the pressure plate, and an interference seal is formed between the sealing ring and the butterfly plate to achieve the sealing performance of the fireproof soft sealing butterfly valve structure; And, the fireproof sealing seat is a long and high-temperature resistant elastic component, which is arranged between the sealing ring and the pressure plate and matches the contour shape of the sealing ring. The fireproof sealing seat and the butterfly plate are interfered with to achieve the sealing of the fireproof soft sealing butterfly valve structure.

2. The fireproof soft-sealed butterfly valve structure according to claim 1, characterized in that: A fluid channel is arranged in the valve body, the butterfly plate is arranged in the fluid channel and can rotate in the valve body to open or seal the fluid channel, and the pressure plate is movably connected to the valve body to press the sealing structure against the butterfly plate when the fluid channel is sealed.

3. The fireproof soft-sealed butterfly valve structure according to claim 1, characterized in that: When the sealing ring is in a normal state, sealing is achieved by relying on the interference between the sealing ring and the butterfly plate, and / or between the fireproof sealing seat and the butterfly plate.

4. The fireproof soft-sealed butterfly valve structure according to claim 1, characterized in that: When the sealing ring is in a damaged state, sealing is achieved by relying on the interference fit between the fireproof sealing seat and the butterfly plate.

5. The fireproof soft-sealed butterfly valve structure according to claim 1, characterized in that: The fireproof sealing seat is in a multi-section curved shape.

6. The fireproof soft-sealed butterfly valve structure according to claim 5, characterized in that: The fireproof sealing seat is made of a nickel-based high-temperature alloy with a high temperature resistance range of 650-700°C.

7. The fireproof soft-sealed butterfly valve structure according to claim 1, characterized in that: A gap is arranged between the valve body and the pressure plate, and the tail end of the fireproof sealing seat is fixed in the gap.

8. The fireproof soft-sealed butterfly valve structure according to claim 7, characterized in that: A gasket is also included, which is arranged between the fireproof sealing seat and the valve body, and between the fireproof sealing seat and the pressure plate.

9. The fireproof soft-sealed butterfly valve structure according to claim 1, characterized in that: The fireproof soft-sealed butterfly valve structure also includes a retaining ring, which is an elastic structure and is arranged on the valve body, and a groove matching the retaining ring is arranged on the pressure plate; The retaining ring is embedded in a groove arranged on the pressing plate to connect the pressing plate and the valve body.

10. The fireproof soft-sealed butterfly valve structure according to claim 1, characterized in that: The sealing ring is made of polytetrafluoroethylene, and its high temperature resistance range is 180-250°C.

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