Butterfly valve
By incorporating bearings and coating them with wear-resistant and reinforcing layers within the butterfly valve, combined with a stepped fit and detachable connection, the problem of easy wear on long valve stems is solved, resulting in easier operation, higher stability and sealing performance, and reduced maintenance requirements.
Patent Information
- Application Number
- CN202520416317.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-11
AI Technical Summary
Existing butterfly valves with long stems are prone to increased wear due to deformation and vibration, affecting normal operation, potentially leading to stem breakage and damage to the transmission mechanism, and requiring frequent maintenance.
A bearing is placed between the valve stem and the extended valve cover, and a wear-resistant layer is coated on the bearing surface. The reinforcement layer reduces friction and wear, and the connection stability and sealing are improved through a stepped fit and detachable connection design.
It reduces operating torque and noise, extends the service life of butterfly valves, reduces maintenance frequency and costs, and improves operating efficiency and sealing performance.
Smart Images
Figure CN223895060U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of valve technology, and more specifically, to a butterfly valve. Background Technology
[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. A butterfly valve is characterized by a disc-shaped closing element (valve disc or butterfly plate) that rotates around a valve shaft to open and close. It can control the flow of various types of fluids, including air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media. When installed in pits, deep wells, or confined spaces, an extended-stem butterfly valve is often installed to facilitate faster operation by staff.
[0003] However, in actual use, when the valve stem is too long, it is more prone to deformation and vibration during operation or under fluid pressure. This not only affects the normal operation of the valve but may also lead to accelerated wear between the valve stem and packing, shortening the service life of the valve stem and packing, and may even cause the valve stem to break, resulting in valve malfunction. Long-term use will accelerate the wear of the transmission mechanism, such as gear tooth surface wear and worm gear seizing, and may even lead to damage to transmission components, rendering the butterfly valve unable to operate normally. Utility Model Content
[0004] This application aims to address at least one of the technical problems existing in the prior art or related technologies.
[0005] In view of this, this application proposes a butterfly valve, comprising: a valve body having a valve cavity; a mounting opening at the top of the valve body; an extended valve cover covering the mounting opening, the valve cover having a mounting hole coaxially arranged with the mounting hole and the mounting opening; a valve stem extending into the valve cavity through the mounting hole and the mounting opening; a valve plate disposed on the outer axis of the valve stem and rotating around the valve stem, the valve plate being located within the valve cavity; and a bearing disposed between the valve stem and the valve cover.
[0006] By installing a bearing between the valve stem and the extended valve cover, specifically in the middle of the valve stem, friction between the valve stem and the extended valve cover can be reduced, lowering the operating torque and making the butterfly valve easier to open and close. Furthermore, no additional lubrication is required, reducing maintenance workload. Simultaneously, it can also reduce noise during butterfly valve operation and running, improving the working environment.
[0007] In some technical solutions, the surface of the bearing may optionally be provided with a wear-resistant layer.
[0008] The wear-resistant layer effectively slows down the wear rate of the bearings, thereby extending the service life of the butterfly valve. Simultaneously, the presence of the wear-resistant layer reduces the frequency of maintenance and replacement due to bearing wear, thus lowering the maintenance costs of the butterfly valve. Finally, the wear-resistant layer reduces the coefficient of friction between the bearing and the valve stem, making the opening and closing operation of the butterfly valve smoother and improving operational efficiency.
[0009] In some technical solutions, the wear-resistant layer may optionally be a polytetrafluoroethylene wear-resistant layer and / or a lead wear-resistant layer.
[0010] In some technical solutions, an optional reinforcing layer is provided between the bearing and the wear-resistant layer.
[0011] In some technical solutions, the reinforcing layer may optionally be a bronze powder reinforcing layer.
[0012] Reinforcing layers increase the overall strength of a bearing, enabling it to withstand greater loads. This is especially important for bearings operating in high-pressure, high-load environments. By adding reinforcing layers, the bearing structure becomes more stable, less prone to deformation or damage, thus helping to ensure the bearing's stability and reliability during long-term operation.
[0013] In some technical solutions, the valve plate and valve stem are optionally axially positioned by a locating pin;
[0014] The valve stem and valve plate are provided with interconnected radial holes, and the locating pin passes through the radial holes.
[0015] In some technical solutions, the extended valve cover and valve body can be detachably connected.
[0016] The detachable connection allows for the individual removal of the extended valve cover. When a component inside the butterfly valve fails, the detachable connection enables quick location and replacement of the faulty part without replacing the entire butterfly valve. This facilitates the inspection, cleaning, repair, or replacement of internal valve components, while reducing maintenance costs and time.
[0017] In some technical solutions, the extended valve cover and valve body can be optionally fixed together by a flange connection.
[0018] In some technical solutions, optionally, a first stepped surface is provided on the inner wall of the installation opening; a second stepped surface is provided at the end where the extended valve cover and valve body are connected; the first stepped surface and the second stepped surface are in step fit.
[0019] The stepped fit design increases the contact area between the extended bonnet and the valve body, effectively improving the connection stability. This helps prevent loosening or deformation of the connecting parts under high pressure or vibration environments. Simultaneously, when the first and second stepped surfaces are tightly fitted, an additional sealing interface is formed. This helps prevent fluid or gas leakage through the connection, thereby enhancing the butterfly valve's sealing performance. The stepped fit provides a clear reference point for the alignment and installation of the extended bonnet and valve body. This helps simplify the installation process, reduce installation errors, and make disassembly easier.
[0020] In some technical solutions, a sealing gasket may also be included, which is disposed between the first step surface and the second step surface.
[0021] The sealing gasket is placed between the first and second step surfaces. It fills the tiny gap between the two step surfaces, providing an additional seal and preventing leakage.
[0022] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description
[0023] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0024] Figure 1 A schematic diagram of the butterfly valve in an embodiment of this application is shown;
[0025] Figure 2 It shows Figure 1 A magnified structural diagram of point A in the middle.
[0026] in, Figure 1 and Figure 2 The correspondence between the reference numerals and component names in the attached drawings is as follows:
[0027] 100 Valve body; 110 Valve cavity; 111 Connecting pipe inlet portion; 112 Connecting pipe outlet portion; 113 Mounting opening; 114 First stepped surface; 200 Extended valve cover; 210 Mounting hole; 220 Second stepped surface; 300 Valve stem; 400 Valve plate; 500 Bearing; 600 Positioning pin; 700 Flange; 800 Sealing gasket. Detailed Implementation
[0028] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0029] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.
[0030] The following is combined with Figure 1 and Figure 2 The butterfly valve provided in this application will be described in detail through specific embodiments and application scenarios.
[0031] like Figure 1 and Figure 2 As shown, an embodiment of this utility model provides a butterfly valve, which includes: a valve body 100, an extended valve cover 200, a valve stem 300, a valve plate 400, and a bearing 500.
[0032] Specifically, the valve body 100 has a valve cavity 110, which includes an inflow portion 111 and an outflow portion 112 connected to a connecting pipe. The top of the valve body 100 has a mounting opening 113. An extended valve cover 200 covers the mounting opening 113, and the extended valve cover 200 has a mounting hole 210 coaxially aligned with the mounting opening 113. The valve stem 300 extends into the valve cavity 110 through the mounting hole 210 and the mounting opening 113. A valve plate 400 is disposed within the valve cavity 110 and located outside the valve stem 300; the valve plate 400 is rotatable around the valve stem 300. A bearing 500 is disposed between the valve stem 300 and the extended valve cover 200.
[0033] In the above embodiment, by providing a bearing 500 between the valve stem 300 and the extended valve cover 200, that is, by providing a bearing 500 in the middle of the valve stem 300, the friction between the valve stem 300 and the extended valve cover 200 can be reduced, the operating torque can be reduced, the butterfly valve can be opened and closed more easily, and no additional lubrication is required, thus reducing maintenance workload; at the same time, it can also reduce the noise during the operation and running of the butterfly valve and improve the working environment.
[0034] In some embodiments, the surface of the bearing 500 is provided with a wear-resistant layer. This wear-resistant layer effectively slows down the wear rate of the bearing 500, thereby extending the service life of the butterfly valve. Simultaneously, the presence of the wear-resistant layer reduces the frequency of maintenance and replacement due to bearing 500 wear, thus lowering the maintenance costs of the butterfly valve. Finally, the wear-resistant layer reduces the coefficient of friction between the bearing and the valve stem, making the opening and closing operation of the butterfly valve smoother and improving operational efficiency.
[0035] In the above embodiments, the material of the wear-resistant layer is not particularly limited, and any known material can be selected. Exemplarily, the wear-resistant layer is made of polytetrafluoroethylene (PTFE) and / or lead. PTFE is a polymer material with an extremely low coefficient of friction and high lubricity, making it very suitable as a wear-resistant layer material. Applying a PTFE wear-resistant layer to the bearing surface of a butterfly valve can significantly reduce the frictional resistance between the bearing and the valve stem, making the opening and closing operation of the butterfly valve easier and smoother. Lead, on the other hand, is a relatively soft metal with good lubricity and shock absorption properties. Applying a lead wear-resistant layer to the bearing surface can reduce friction and wear to a certain extent, while also providing a certain buffering effect. Lead wear-resistant layers are particularly suitable for applications requiring reduced noise and vibration.
[0036] In some embodiments, a reinforcing layer is further provided between the bearing 500 and the wear-resistant layer. The reinforcing layer can increase the overall strength of the bearing 500, enabling it to withstand greater loads. This is particularly important for bearings operating in high-pressure, high-load environments. By adding a reinforcing layer, the structure of the bearing 500 is more stable and less prone to deformation or damage, thereby helping to ensure the stability and reliability of the bearing 500 during long-term operation.
[0037] In the above embodiments, the material of the reinforcing layer is not particularly limited, and any known material can be selected. Exemplarily, bronze powder is selected as the material of the reinforcing layer. The bronze powder reinforcing layer can increase the overall strength of the bearing 500, enabling it to withstand greater loads. The wear resistance and lubricity of bronze powder help reduce bearing wear, thereby extending its service life. By adding a bronze powder reinforcing layer, the stability of the bearing can be improved, ensuring the normal operation of the equipment.
[0038] In some embodiments, the valve plate 400 and the valve stem 300 are axially positioned by a locating pin 600. The valve stem 300 and the valve plate 400 are provided with interconnected radial holes, and the locating pin 600 passes through these radial holes, connecting the valve plate 400 and the valve stem 300 together.
[0039] In some embodiments, the extended valve cover 200 and the valve body 100 are detachably connected. This detachable connection allows for the individual removal of the extended valve cover 200. When a component inside the butterfly valve fails, the detachable connection enables the rapid location and replacement of the faulty component without replacing the entire butterfly valve. This facilitates the inspection, cleaning, repair, or replacement of the valve body's internal components, while reducing maintenance costs and time.
[0040] In practical applications, the extended valve cover 200 and the valve body 100 are connected and fixed by a flange 700. It is understood that bolts and threads can also be used for connection.
[0041] In some embodiments, the inner wall of the mounting opening 113 is provided with a first stepped surface 114; the end where the extended valve cover 200 and the valve body 100 are connected is provided with a second stepped surface 220, and the first stepped surface 114 and the second stepped surface 220 are in a stepped fit. The stepped fit design increases the contact area between the two, effectively improving the connection stability between the extended valve cover 200 and the valve body 100. This helps prevent loosening or deformation of the connecting parts under high pressure or vibration environments. At the same time, when the first stepped surface 114 and the second stepped surface 220 are tightly fitted, an additional sealing interface is formed between them. This helps prevent fluid or gas leakage through the connection, thereby enhancing the sealing performance of the butterfly valve. The stepped fit provides a clear reference point for the alignment and installation between the extended valve cover 200 and the valve body 100. This helps simplify the installation process, reduce installation errors, and make the disassembly process more convenient.
[0042] In the above embodiment, the butterfly valve further includes a sealing gasket 800, which is disposed between the first stepped surface 114 and the second stepped surface 220. The sealing gasket 800, disposed between the first stepped surface 114 and the second stepped surface 220, fills the minute gap between the two stepped surfaces, providing an additional sealing effect and preventing leakage.
[0043] Understandably, the gasket 800 can be selected based on the butterfly valve's operating environment and media characteristics. For example, for high-temperature, high-pressure, or corrosive media, gasket materials resistant to high temperatures, high pressures, or corrosion can be selected.
[0044] It should be clarified that in the claims, description, and accompanying drawings of this application, the term "multiple" refers to two or more objects. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description process, not to indicate or imply that the device or element referred to must have the described specific orientation, or be constructed and operated in a specific orientation. Therefore, these descriptions should not be construed as limitations on this application. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects or an indirect connection between multiple objects through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this application can be understood based on the specific circumstances of the above data.
[0045] In the claims, description, and accompanying drawings of this application, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In the claims, description, and accompanying drawings of this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0046] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A butterfly valve, characterized in that, include: The valve body has a valve cavity; the top of the valve body has an installation opening. An extended valve cover is provided above the mounting opening. The valve cover has a mounting hole, and the mounting hole and the mounting opening are coaxially arranged. The valve stem extends into the valve cavity through the mounting hole and the mounting opening; A valve plate is disposed on the outer shaft of the valve stem and can rotate around the valve stem; the valve plate is located inside the valve cavity. A bearing is disposed between the valve stem and the extended valve cover.
2. The butterfly valve according to claim 1, characterized in that, The surface of the bearing is provided with a wear-resistant layer.
3. The butterfly valve according to claim 2, characterized in that, The wear-resistant layer is a polytetrafluoroethylene wear-resistant layer and / or a lead wear-resistant layer.
4. The butterfly valve according to claim 2, characterized in that, A reinforcing layer is also provided between the bearing and the wear-resistant layer.
5. The butterfly valve according to claim 4, characterized in that, The reinforcing layer is a bronze powder reinforcing layer.
6. The butterfly valve according to claim 1, characterized in that, The valve plate and the valve stem are axially positioned by a positioning pin. The valve stem and the valve plate are provided with radial holes that communicate with each other, and the positioning pin passes through the radial holes.
7. The butterfly valve according to claim 1, characterized in that, The extended valve cover and the valve body are detachably connected.
8. The butterfly valve according to claim 7, characterized in that, The extended valve cover and the valve body are fixed together by a flange connection.
9. The butterfly valve according to claim 7, characterized in that, The inner wall of the installation opening is provided with a first stepped surface; the end where the extended valve cover connects to the valve body is provided with a second stepped surface; the first stepped surface and the second stepped surface are in step fit.
10. The butterfly valve according to claim 9, characterized in that, It also includes a sealing gasket disposed between the first step surface and the second step surface.