A sanitary butterfly valve

Abstract

This utility model relates to a sanitary butterfly valve, comprising a valve body, a valve plate disposed within the valve body, and a valve stem connected to the valve plate. One end of the valve stem extends out of the valve body and is connected to a drive component. Connecting flanges are provided on both sides of the valve body. Grooves for installing leak-proof sealing rings are formed on the outer end faces of the connecting flanges. Positioning components are provided on the inner end faces of the connecting flanges. Each positioning component includes an abutment ring and at least two positioning blocks. The positioning blocks can slide along the radial direction of their corresponding connecting flanges. The abutment ring is coaxially arranged with the connecting flange and has an abutment ramp. The abutment ring can move away from the valve body and push the positioning blocks outwards from the flange through the abutment ramp. The positioning blocks in this utility model can move radially along the flange, thereby adapting to dimensional errors between the connecting flange and the pipe end flange, ensuring coaxiality between them, and helping to reduce the size of the connecting flange and lower costs.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valves, specifically to a sanitary butterfly valve. Background Technology

[0002] Sanitary butterfly valves are used in many industries such as food, brewing, beverage, dairy products, fine chemical pharmaceuticals and bioengineering. They can be used with various actuators and have the advantages of simple structure, beautiful appearance, quick assembly and disassembly, rapid opening and closing, flexible operation, low fluid resistance and safe and reliable use.

[0003] There are three ways to connect sanitary butterfly valves to pipelines: clamp connection, welding, and threaded connection. Among them, clamp connection has the advantages of quick installation, no tools required, and convenient disassembly, and is widely used in the food, beverage, and pharmaceutical industries. When using clamp connection, if there is a dimensional error between the two, misalignment can easily occur, leading to seal failure and leakage. Utility Model Content

[0004] To solve the above problems, this utility model proposes a sanitary butterfly valve, the specific technical solution of which is as follows:

[0005] A sanitary butterfly valve includes a valve body, a valve plate disposed within the valve body, and a valve stem connected to the valve plate. One end of the valve stem extends out of the valve body and is connected to a drive component. Both sides of the valve body are provided with connecting flanges. Grooves for installing leak-proof sealing rings are opened on the outer end faces of the connecting flanges. Positioning components are provided on the inner end faces of the connecting flanges. The positioning components include an abutment ring and at least two positioning blocks. The positioning blocks can slide along the radial direction of their corresponding connecting flanges. The abutment ring is coaxially arranged with the connecting flange and has an abutment ramp. The abutment ring can move away from the valve body and push the positioning blocks outward from the flange through the abutment ramp.

[0006] Furthermore, the driving component is a handle, and the handle is connected to the valve stem via a flat key.

[0007] Furthermore, annular grooves are provided on the inner end face of the connecting flange, and the contact ring is installed in its corresponding annular groove by threaded connection.

[0008] Furthermore, there are two positioning blocks, which are arranged symmetrically according to the abutment ring.

[0009] Furthermore, the end of the positioning block near the connecting flange axis is a hemispherical head, and the contact ring can move the positioning block through the contact between the contact ramp and the hemispherical head.

[0010] The beneficial effects of this utility model are as follows:

[0011] The positioning block can move radially along the flange to accommodate dimensional errors between the connecting flange and the pipe end flange, ensuring coaxiality between them, and also helping to reduce the size of the connecting flange and lower costs. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the sanitary butterfly valve described in this utility model;

[0014] Figure 2 This is an exploded view of the sanitary butterfly valve described in this utility model;

[0015] Figure 3 This is a partial sectional view of the sanitary butterfly valve described in this utility model;

[0016] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0017] Figure 5 This is a schematic diagram of the clamp connection described in the embodiment.

[0018] In the diagram: 1. Connecting flange; 2. Valve body; 3. Handle; 4. Valve stem; 5. Valve plate; 6. Annular groove; 7. Abutment ring; 8. Positioning block; 9. Hemispherical head; 10. Sliding block; 11. Slide groove; 12. Clamp; 13. Pipe end flange; 14. Leak-proof sealing 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] The present invention provides the following specific embodiments:

[0021] like Figure 1-4 As shown, this utility model provides a sanitary butterfly valve, including a valve body 2, a valve plate 5, and a valve stem 4. The valve plate 5 is arranged inside the valve body 2, and a sealing ring is provided between the valve body 2 and the valve plate 5. The valve stem 4 is fixedly connected to the valve plate 5, and one end of the valve stem 4 extends out of the valve body 2 and is connected to a driving component. A sealing ring is provided between the valve stem 4 and the valve body 2, and the driving component can drive the valve plate 5 to rotate through the valve stem 4. Both sides of the valve body 2 are provided with connecting flanges 1, and the outer end face of the connecting flanges 1 is provided with grooves for installing anti-leakage sealing rings 14. The inner end face of the connecting flanges 1 is provided with positioning components, including abutment rings 7 and positioning blocks 8. There are at least two positioning blocks 8, and the positioning blocks 8 are respectively installed on the inner end face of the connecting flanges 1 through sliders 10 and slide grooves 11. The positioning blocks 8 can slide along the radial direction of their corresponding connecting flanges 1. The abutment ring 7 is arranged coaxially with the connecting flange 1, and the abutment ring 7 is provided with abutment slope. The abutment ring 7 can move away from the valve body 2 and push the positioning blocks 8 to move outward of the flange through the abutment slope.

[0022] Furthermore, the driving component is a handle 3, which is connected to the valve stem 4 via a flat key. The handle 3 can drive the valve plate 5 to rotate.

[0023] Furthermore, annular grooves 6 are provided on the inner end face of the connecting flange 1, and the abutment ring 7 is installed in its corresponding annular groove 6 by threaded connection. The cross-section of the abutment ring 7 is L-shaped, and the abutment inclined surface is provided on the side opposite to the inner end face of the connecting flange 1.

[0024] Furthermore, there are two positioning blocks 8, which are arranged symmetrically according to the abutment ring 7.

[0025] Furthermore, the end of the positioning block 8 near the axis of the connecting flange 1 is a hemispherical head 9, and the contact ring 7 can move the positioning block 8 through the contact between the contact inclined surface and the hemispherical head 9.

[0026] like Figure 5 As shown, during use, after installing the leak-proof sealing ring 14, the outer end face of the connecting flange 1 is fitted with the end face of the pipe end flange 13. The clamp 12 is used to wrap the connecting flange 1 and its corresponding pipe end flange 13. The abutment ring 7 is rotated so that the positioning block 8 abuts against the clamp 12 to ensure the coaxiality of the connecting flange 1 and the pipe end flange 13. Finally, the clamp 12 is locked to complete the connection.

[0027] The positioning block 8 can move along the radial direction of the flange to accommodate the dimensional error between the connecting flange 1 and the pipe end flange 13, ensuring the coaxiality between the two, and at the same time helping to reduce the size of the connecting flange 1 and reduce costs.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A sanitary butterfly valve, comprising a valve body, a valve plate disposed within the valve body, and a valve stem connected to the valve plate, one end of the valve stem extending out of the valve body and connected to a drive component, and connecting flanges provided on both sides of the valve body, wherein grooves for installing leak-proof sealing rings are formed on the outer end faces of the connecting flanges, characterized in that: The inner end face of the connecting flange is provided with a positioning component, which includes an abutment ring and at least two positioning blocks. The positioning blocks can slide along the radial direction of their corresponding connecting flange. The abutment ring is arranged coaxially with the connecting flange and has an abutment ramp. The abutment ring can move away from the valve body and push the positioning blocks outward from the flange through the abutment ramp.

2. The sanitary butterfly valve according to claim 1, characterized in that: The driving component is a handle, which is connected to the valve stem via a flat key.

3. The sanitary butterfly valve according to claim 1, characterized in that: The inner end face of the connecting flange is provided with annular grooves, and the contact ring is installed in its corresponding annular groove by threaded connection.

4. A sanitary butterfly valve according to claim 1, characterized in that: There are two positioning blocks, which are arranged symmetrically according to the contact ring.

5. A sanitary butterfly valve according to claim 1, characterized in that: The end of the positioning block near the axis of the connecting flange is a hemispherical head, and the contact ring can move the positioning block by contacting the inclined surface with the hemispherical head.

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