Quick-assembly double-seal butterfly valve

Abstract

A first mounting cylinder and a second mounting cylinder which are collinear in the radial direction of the polymer valve seat and are communicated to the middle of the polymer valve seat are arranged on the peripheral wall of the polymer valve seat, and a clamping ring is formed on the peripheral wall of the middle of the polymer valve seat in the height direction. First sealing rings corresponding to the first ring grooves are formed at the two ends of the clamping ring in the thickness direction respectively; according to the quick-assembly double-sealing butterfly valve, the butt joint end faces of the valve body sheet rings are provided with the first ring grooves, when the two valve body sheet rings are in butt joint, the clamping ring is clamped and fixed, meanwhile, the first sealing ring enters the first ring grooves, so that the sealing effect is achieved, and the requirement for additionally arranging the sealing ring is omitted; through the structural arrangement of the valve body sheet ring and the polymer valve seat, the sealing effect can be guaranteed while quick assembly is achieved; and a second sealing ring and a third sealing ring respectively guarantee the sealing effect at the positions of the first fixing rod and the second fixing rod.

Description

Technical Field

[0001] The utility model relates to the field of butterfly valves, and particularly relates to a quick-installation double-sealed butterfly valve. Background Art

[0002] In the prior art, a butterfly valve is a common fluid control device with a delicate structure design and diverse functions. The butterfly valve mainly consists of components such as a valve body, a valve stem, a butterfly plate, and a driving device, and realizes the opening, closing, or adjustment of the fluid by the rotation of the butterfly plate in the valve body. The valve body of the butterfly valve is usually made by casting or forging processes, and the materials are mostly carbon steel, stainless steel, alloy steel, etc. to meet the requirements of different media and working conditions. A sealing surface is also provided inside the valve body to cooperate with the butterfly plate to achieve the sealing function. The valve stem is a key component connecting the butterfly plate and the driving device, and its material and processing accuracy directly affect the sealing performance and service life of the butterfly valve. The butterfly plate is the opening and closing part of the butterfly valve, and its shape and material have an important impact on the performance of the butterfly valve. The butterfly plate usually adopts a disc-shaped design, and the materials are mostly low-carbon steel, stainless steel, alloy steel, etc. The driving methods of the butterfly valve are diverse, including manual, electric, pneumatic, hydraulic, etc. The butterfly valve has the advantages of a compact structure, simple operation, a wide flow regulation range, good sealing performance, and a wide application range.

[0003] Currently, there is also a way to use a polymer material as the valve seat. Due to the inherent characteristics of the polymer material, the above valve seat has problems with abnormal deformation and sealing. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a quick-installation double-sealed butterfly valve, aiming to solve the sealing problem caused by abnormal deformation due to the use of a polymer material as the valve seat.

[0005] To achieve the above purpose, the utility model provides a quick-installation double-sealed butterfly valve, including:

[0006] A valve body, including two valve body piece rings butt-jointed in the length direction by a plurality of bolt assemblies. Blind holes and through holes that are evenly pieced together and radially arranged and collinear are provided at the butt-joint position of the two valve body piece rings. A first ring groove is provided on the butt-joint end surface of the valve body piece ring;

[0007] A ring-shaped polymer valve seat, with a first installation cylinder and a second installation cylinder that are collinear in the radial direction and conduct to the middle provided on the outer peripheral wall. A clamping ring is formed on the outer peripheral wall in the middle of the polymer valve seat in the height direction. First sealing rings corresponding to the first ring groove are formed at both ends of the clamping ring in the thickness direction. Among them, the polymer valve seat is clamped between the two valve body piece rings in the thickness direction;

[0008] The valve plate is arranged to match the polymer valve seat. A first mounting port and a second mounting port are respectively arranged on the peripheral wall of the valve plate corresponding to the first mounting cylinder and the second mounting cylinder.

[0009] One end of the first fixing rod passes through the first mounting cylinder and is connected to the first mounting port, and the other end is matched with the blind hole. A second sealing ring matched with the blind hole is arranged on the outer peripheral wall of the first fixing rod.

[0010] One end of the second fixing rod passes through the second mounting cylinder and is connected to the second mounting port. A third sealing ring matched with the through hole is arranged on the outer peripheral wall of the second fixing rod.

[0011] Furthermore, a second annular groove is arranged on the end face of the valve body piece ring corresponding to the length direction of the polymer valve seat.

[0012] Furthermore, the outer diameter of the first fixing rod is consistent with the inner diameter of the first mounting port on the valve plate, and they are in plug-in fit.

[0013] Furthermore, the second sealing ring and the third sealing ring are integrally formed on the polymer valve seat.

[0014] Furthermore, the bolt assembly further includes an elastic gasket, and the elastic gasket is clamped by the two valve body piece rings.

[0015] Furthermore, a skeleton ring made of metal material is wrapped in the middle of the clamping ring in the thickness direction.

[0016] Furthermore, the clamping ring completely wraps the skeleton ring.

[0017] Furthermore, the number of the bolt assemblies is four, and they are evenly arranged around the circumference.

[0018] Furthermore, the valve body piece ring, the valve plate, the first fixing rod and the second fixing rod are made of stainless steel.

[0019] Furthermore, the polymer valve seat is made of polyurethane.

[0020] For the quick-install double-sealing butterfly valve provided by the present utility model, a first annular groove is arranged on the butting end face of the valve body piece ring, a clamping ring is formed on the outer peripheral wall of the polymer valve seat, and first sealing rings corresponding to the first annular groove are respectively formed at both ends of the clamping ring in the thickness direction. When the two valve body piece rings are butted, while clamping and fixing the clamping ring, the first sealing rings enter the first annular groove to form a sealing effect, thereby eliminating the need for an additional sealing ring; through the structural arrangement of the valve body piece ring and the polymer valve seat, quick installation can be achieved while ensuring the sealing effect; the second sealing ring and the third sealing ring respectively ensure the sealing effects at the positions of the first fixing rod and the second fixing rod. Description of the Drawings

[0021] Figure 1 is a schematic diagram (disassembled state) of the quick - installation double - seal butterfly valve according to the first embodiment of the present utility model;

[0022] Figure 2 is a cross - sectional view (disassembled state) of the quick - installation double - seal butterfly valve according to the first embodiment of the present utility model;

[0023] Figure 3 is a schematic diagram (installed state) of the quick - installation double - seal butterfly valve according to the first embodiment of the present utility model;

[0024] Figure 4 is a schematic diagram of the valve body in the quick - installation double - seal butterfly valve according to the first embodiment of the present utility model;

[0025] Figure 5 is a schematic diagram of the installation of the first fixing rod and the second fixing rod in the quick - installation double - seal butterfly valve according to the first embodiment of the present utility model;

[0026] Figure 6 is Figure 5 a partial enlargement in

[0027] Figure 7 is a schematic diagram of the valve plate in the quick - installation double - seal butterfly valve according to the first embodiment of the present utility model;

[0028] Figure 8 is a schematic diagram of the polymer valve seat in the quick - installation double - seal butterfly valve according to the first embodiment of the present utility model.

[0029] The realization of the object, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific Embodiments

[0030] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0031] Those skilled in the art of the present technology can understand that, unless specifically stated, the singular forms "a", "an", "the", "above-mentioned" and "said" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model means the presence of the described features, integers, steps, operations, elements, units, modules and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components and / or their groups. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0032] Those skilled in the art of the present technology can understand that, unless otherwise defined, all terms used herein (including technical terms and scientific terms) have the same meaning as the general understanding of those of ordinary skill in the art to which the present utility model belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as here.

[0033] Referring to Figures 1 to 8 , in an embodiment of the present utility model, a quick-install double-sealed butterfly valve includes:

[0034] A valve body 100, including two valve body piece rings 110 butt-jointed in the length direction by a plurality of bolt assemblies. The two valve body piece rings 110 are provided with blind holes 120 and through holes 130 that are evenly pieced together and are collinear along the radial direction at the butt-joint position. A first ring groove 111 is provided on the butt-joint end face of the valve body piece ring 110;

[0035] An annular polymer valve seat 200, on the outer peripheral wall of which are provided a first mounting cylinder 210 and a second mounting cylinder 220 that are collinear in the radial direction and conduct to the middle. A clamping ring 230 is formed on the outer peripheral wall of the polymer valve seat 200 in the middle in the height direction. At both ends of the clamping ring 230 in the thickness direction are respectively formed first sealing rings 231 corresponding to the first ring groove 111. Wherein, the polymer valve seat 200 is clamped between the two valve body piece rings 110 in the thickness direction;

[0036] A valve plate 300, which is arranged to match the polymer valve seat 200. First mounting ports 310 and second mounting ports 320 corresponding to the first mounting cylinder 210 and the second mounting cylinder 220 are respectively provided on the peripheral wall of the valve plate 300;

[0037] The first fixing rod 400 has one end passing through the first mounting cylinder 210 and connecting to the first mounting port 310, and the other end matching with the blind hole 120. A second sealing ring 410 matching with the blind hole 120 is arranged on the outer peripheral wall of the first fixing rod 400;

[0038] The second fixing rod 500 has one end passing through the second mounting cylinder 220 and connecting to the second mounting port 320. A third sealing ring 510 matching with the through hole 130 is arranged on the outer peripheral wall of the second fixing rod 500.

[0039] In the prior art, when using a polymer material as the valve seat, due to the inherent characteristics of the polymer material, there are sealing problems caused by abnormal deformation.

[0040] In the present utility model, the valve body 100 includes two valve body piece rings 110 butt-jointed in the length direction by a plurality of bolt assemblies. The structures of the two valve body piece rings 110 can be the same or have certain differences, but the shapes are all cylindrical. Thus, when the two are combined, a flow channel can be formed at the central axis. The through hole 130 and the blind hole 120 which are both formed by splicing and are collinear along the radial direction are arranged at the butt-joint position of the two valve body piece rings 110. Both the through hole 130 and the blind hole 120 are splicing structures. Taking the through hole 130 as an example, groove-like structures are arranged on the butt-joint end faces of the two valve body piece rings 110. When the two valve body piece rings 110 are butt-jointed, the two groove-like structures form the through hole 130. A first ring groove 111 is arranged on the butt-joint end face of the valve body piece ring 110. Specifically, one end of the valve body piece ring 110 in the length direction is the butt-joint end face, and the first ring groove 111 is arranged on the butt-joint end face, wherein the first ring groove 111 does not limit the formation of a complete ring structure.

[0041] On the outer peripheral wall of the annular polymer valve seat 200, a first mounting cylinder 210 and a second mounting cylinder 220 which are collinear in the radial direction and conduct to the middle are arranged. The first mounting cylinder 210 and the second mounting cylinder 220 are respectively the insertion positions of the subsequent first fixing rod 400 and second fixing rod 500. A clamping ring 230 is formed on the outer peripheral wall of the polymer valve seat 200 in the middle in the height direction. After the two valve body piece rings 110 are butt-jointed, the valve body piece ring 110 compresses and clamps the clamping ring 230. First sealing rings 231 corresponding to the first ring grooves 111 are respectively formed at both ends of the clamping ring 230 in the thickness direction. After the two valve body piece rings 110 are butt-jointed, the first sealing rings 231 enter the first ring grooves 111 to form a sealing effect, thereby eliminating the need for an externally added sealing ring. The polymer valve seat 200 is clamped between the two valve body piece rings 110 in the thickness direction.

[0042] The valve plate 300 is arranged to match the polymer valve seat 200. The combination method of the valve plate 300 and the polymer valve seat 200 is not limited and can be various combination methods in the prior art. Corresponding to the first mounting cylinder 210 and the second mounting cylinder 220 on the peripheral wall of the valve plate 300, a first mounting port 310 and a second mounting port 320 are respectively arranged.

[0043] One end of the first fixing rod 400 in the length direction passes through the first mounting cylinder 210 and is connected to the first mounting port 310. The other end of the first fixing rod 400 in the length direction is matched with the blind hole 120. A second sealing ring 410 matched with the blind hole 120 is arranged on the outer peripheral wall of the first fixing rod 400. The function of the first fixing rod 400 is to support the valve plate 300. During the rotation of the valve plate 300, the first fixing rod 400 serves as the rotation basis.

[0044] One end of the second fixing rod 500 in the length direction passes through the second mounting cylinder 220 and is connected to the second mounting port 320. A third sealing ring 510 matched with the through hole 130 is arranged on the outer peripheral wall of the second fixing rod 500. The other end of the second fixing rod 500 in the length direction is the basis for operation. Specifically, the way to realize the rotation operation of the second fixing rod 500 can be manual or by using relevant mechanical equipment.

[0045] In summary, on the docking end face of the valve body piece ring 110, a first ring groove 111 is provided. A clamping ring 230 is formed on the outer peripheral wall of the polymer valve seat 200. And first sealing rings 231 corresponding to the first ring groove 111 are respectively formed at both ends of the clamping ring 230 in the thickness direction. When the two valve body piece rings 110 are docked, while clamping and fixing the clamping ring 230, the first sealing ring 231 enters the first ring groove 111 to form a sealing effect, thus eliminating the need for an additional sealing ring; through the structural settings of the valve body piece ring 110 and the polymer valve seat 200, quick installation is achieved while ensuring the sealing effect; the second sealing ring 410 and the third sealing ring 510 respectively ensure the sealing effect at the positions of the first fixing rod 400 and the second fixing rod 500.

[0046] Refer to Figure 2 , in an embodiment, the valve body piece ring 110 is provided with a second ring groove 112 corresponding to the end face of the polymer valve seat 200 in the length direction.

[0047] In this embodiment, through the second ring groove 112, the valve body piece ring 110 can better clamp the polymer valve seat 200. Specifically, during the installation process, the two end faces of the polymer valve seat 200 in the length direction respectively extend into the respective second ring grooves 112 of the two valve body piece rings 110, and thus the fixing effect of the polymer valve seat 200 is ensured.

[0048] In one embodiment, the outer diameter of the first fixing rod 400 is consistent with the inner diameter of the first mounting opening 310 on the valve plate 300, and they are in plug-in fit.

[0049] In this embodiment, through the above dimension settings, the first fixing rod 400 can be rotatably arranged on the valve plate 300, so that the first fixing rod 400 does not limit the rotation of the valve plate 300. At the same time, due to the characteristics of the circumference of the first fixing rod 400 and the first mounting opening 310, the processing process is relatively simple.

[0050] Referring to Figure 8 , in one embodiment, the second sealing ring 410 and the third sealing ring 510 are integrally formed on the polymer valve seat 200.

[0051] In this embodiment, integrating the second sealing ring 410 and the third sealing ring 510 on the polymer valve seat 200 simplifies the installation and disassembly process. For example, if the material of the polymer valve seat 200 is polyurethane, then the second sealing ring 410 and the third sealing ring 510 are also polyurethane. At this time, the second sealing ring 410 and the third sealing ring 510 can also play a sealing role.

[0052] In one embodiment, the bolt assembly further includes an elastic gasket, and the elastic gasket is clamped by two valve body piece rings 110.

[0053] In this embodiment, through the setting of the elastic gasket, while not interfering with the clamping of the polymer valve seat 200 by the two valve body piece rings 110, it can provide the function of position insurance and avoid excessive compression of the polymer valve seat 200 by the two valve body piece rings 110. The material of the elastic gasket is stainless steel.

[0054] In one embodiment, a skeleton ring made of a metal material is wrapped around the middle of the clamping ring 230 in the thickness direction.

[0055] In this embodiment, the material of the skeleton ring can be aluminum alloy or stainless steel, etc. The clamping ring 230 wraps the skeleton ring in the thickness direction. The structural strength is achieved through the skeleton ring, and the elastic effect [sealing effect] is achieved through the clamping rings 230 on both sides of the thickness direction of the skeleton ring. In the specific processing process, during the processing of the polymer valve seat 200, the skeleton ring is set in advance by an embedding method.

[0056] In one embodiment, the clamping ring 230 completely wraps the skeleton ring.

[0057] In this embodiment, the skeleton ring is set to be completely wrapped by the clamping ring 230, so that while the probability of the skeleton ring coming off is reduced, the probability of the skeleton ring being affected by the environment and causing problems is also reduced.

[0058] Referring to Figure 1, in one embodiment, the number of the bolt assemblies is four, and they are evenly arranged around the circumference.

[0059] In this embodiment, the appropriate number and position of the bolt assemblies are defined, so that the two valve body piece rings 110 can be well combined.

[0060] In one embodiment, the materials of the valve body piece ring 110, the valve plate 300, the first fixing rod 400 and the second fixing rod 500 are stainless steel.

[0061] In this embodiment, considering the harshness of the use scenario, the materials of the valve body piece ring 110, the valve plate 300, the first fixing rod 400 and the second fixing rod 500 are all stainless steel, so that the adverse effects of the transported fluid and the external environment are reduced. Specifically, the type of stainless steel can be selected considering the comprehensive cost and technical requirements.

[0062] In one embodiment, the material of the polymer valve seat 200 is polyurethane.

[0063] In this embodiment, by preferably using polyurethane as the material of the polymer valve seat 200, polyurethane has excellent wear resistance and high elasticity. By using bio-based raw materials or adding degradable components, polyurethane products can gradually decompose through the action of microorganisms or the natural environment after reaching the service life, reducing the long-term pollution to the environment and meeting the requirements of sustainable development. The molecular structure of polyurethane is stable, and it has good resistance to a variety of chemical substances, including corrosive substances such as acids, alkalis, and salts. This makes the polymer valve seat 200 perform better in use.

[0064] In summary, for the quick-install double-sealed butterfly valve provided by the present utility model, a first ring groove 111 is provided on the docking end face of the valve body piece ring 110. A clamping ring 230 is formed on the outer peripheral wall of the polymer valve seat 200, and first sealing rings 231 corresponding to the first ring groove 111 are formed at both ends in the thickness direction of the clamping ring 230. When the two valve body piece rings 110 are docked, while clamping and fixing the clamping ring 230, the first sealing ring 231 enters the first ring groove 111 to form a sealing effect, thus eliminating the need for an externally added sealing ring; through the structural settings of the valve body piece ring 110 and the polymer valve seat 200, quick installation is achieved while ensuring the sealing effect; the second sealing ring 410 and the third sealing ring 510 respectively ensure the sealing effect at the positions of the first fixing rod 400 and the second fixing rod 500.

[0065] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A quick-install double-seal butterfly valve, characterized in that: include: The valve body comprises two valve body rings butted together in the length direction by a plurality of bolt assemblies, the two valve body rings are provided with blind holes and through holes which are both assembled and arranged radially and collinear at the butting positions, and the butting end faces of the valve body rings are provided with first annular grooves; A ring-shaped polymer valve seat, on the outer peripheral wall of which are arranged a first mounting tube and a second mounting tube which are collinear in the radial direction and connected to the middle part, a clamping ring is formed on the outer peripheral wall of the polymer valve seat in the middle part in the height direction, and first sealing rings corresponding to the first ring groove are respectively formed at both ends of the clamping ring in the thickness direction, wherein the polymer valve seat is clamped by the two valve body rings in the thickness direction; A valve plate, matched with the polymer valve seat, wherein a first mounting opening and a second mounting opening are respectively provided on a peripheral wall of the valve plate corresponding to the first mounting cylinder and the second mounting cylinder; A first fixing rod, one end of which passes through the first mounting tube and is connected to the first mounting port, and the other end of which matches the blind hole, and the outer peripheral wall of the first fixing rod is provided with a second sealing ring matching the blind hole; One end of the second fixing rod passes through the second mounting tube and is connected to the second mounting port. The outer peripheral wall of the second fixing rod is provided with a third sealing ring matching the through hole.

2. The quick-install double-seal butterfly valve according to claim 1, characterized in that: The end surface of the valve body ring corresponding to the length direction of the polymer valve seat is provided with a second annular groove.

3. The quick-install double-seal butterfly valve according to claim 1, characterized in that: The outer diameter of the first fixing rod is consistent with the inner diameter of the first mounting opening on the valve plate, and they are plug-fitted.

4. The quick-install double-seal butterfly valve according to claim 1, characterized in that: The second sealing ring and the third sealing ring are integrally formed on the polymer valve seat.

5. The quick-install double-seal butterfly valve according to claim 1, characterized in that: The bolt assembly also includes an elastic gasket, and the elastic gasket is clamped by the two valve body rings.

6. The quick-install double-seal butterfly valve according to claim 1, characterized in that: The middle part of the clamping ring in the thickness direction is wrapped with a skeleton ring made of metal material.

7. The quick-install double-seal butterfly valve according to claim 6, characterized in that: The clamping ring completely wraps the frame ring.

8. The quick-install double-seal butterfly valve according to any one of claims 1 to 7, characterized in that: The number of the bolt assemblies is four and they are evenly arranged around the periphery.

9. The quick-install double-seal butterfly valve according to any one of claims 1 to 7, characterized in that: The valve body ring, the valve plate, the first fixing rod and the second fixing rod are made of stainless steel.

10. The quick-install double-seal butterfly valve according to any one of claims 1 to 7, characterized in that: The polymer valve seat is made of polyurethane.

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