Butterfly valve of novel shaft end supporting structure
By setting an arc plate and an extension at the shaft end of the butterfly valve, the problem of stress concentration in the cross rib structure when the valve is closed is solved, which significantly improves the service life of the butterfly valve and makes the stress distribution more even.
Patent Information
- Application Number
- CN202420888167.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-04-26
AI Technical Summary
In the existing butterfly valve structure, the cross ribs will generate greater stress when the valve is closed, which may cause the shaft hole to be torn and affect the service life.
A new shaft end support structure is designed, by fixing the arc plate circumferentially in the shaft end and providing extensions at both ends where the arc plate is connected to the flange to increase the support of the arc plate to the shaft end.
By setting up the arc plate, the stress range at the shaft end is expanded, local stress concentration is reduced, and the service life of the butterfly valve is improved. Finite element analysis shows that the maximum improved stress value is half of the original, and the stress distribution is more uniform.
Smart Images
Figure CN222924956U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of butterfly valves, and particularly relates to a butterfly valve with a novel shaft end support structure. Background Technique
[0002] As a mature industrial product, butterfly valves are widely applicable to the water supply and drainage pipeline systems in industries such as water conservancy, electric power, metallurgy, and municipal administration, playing the role of connecting or cutting off the medium. The pipeline medium includes various fluids such as gases, liquids, and other fluids. Since the water thrust borne by the butterfly plate is finally transmitted to the valve body when the butterfly valve is closed, the strength of the valve body plays a crucial role in the service life of the valve.
[0003] Such as Figure 1 The common structure of the shaft end part in the improved butterfly valve structure shown is a cross rib. This structure is relatively simple and has a low cost. However, when the valve is closed, a large stress will be generated in the water flow direction. Due to the small rib plate, the cross rib will generate a large stress, which may cause the shaft hole to be torn. For this reason, we propose a butterfly valve with a novel shaft end support structure. Content of the Utility Model
[0004] In order to solve the problem that in the current butterfly valve structure, the common cross rib structure at the shaft end part will generate a large stress in the water flow direction when the valve is closed. Due to the small rib plate, the cross rib will generate a large stress, which may cause the shaft hole to be torn, the utility model provides the following technical solution: A butterfly valve with a novel shaft end support structure, including a valve body, flanges are respectively arranged at both ends of the valve body, a shaft end is arranged on the side wall of the valve body, a valve hole is opened in the shaft end, the valve hole can penetrate through the inside and outside of the valve body, a butterfly plate can be connected in the valve hole, an arc plate is fixedly sleeved on the shaft end in the circumferential direction, and the arc plate is fixedly installed between the two flanges.
[0005] Preferably, the radian of the arc plate is equal to the radian of the valve body.
[0006] Preferably, both ends of the arc plate are welded to the adjacent flanges.
[0007] Preferably, extension parts are arranged at both ends of the arc plate connected to the flanges, and the extension parts can increase the support of the arc plate to the shaft end.
[0008] Compared with the prior art, the beneficial effects of the utility model are:
[0009] When the butterfly valve closes the valve by rotating the butterfly plate, the water flow through the valve body is cut off by the butterfly plate, and a large stress will be generated in the water flow direction. Since the rib plates of the cross ribs are small, the cross ribs will generate a large stress. By setting the arc plate, the stress range at the shaft end can be increased, so the local average stress will be reduced a lot, reducing the influence of stress concentration and greatly improving the service life of the butterfly valve. Through finite element analysis, the maximum stress value in the local area at the shaft end after improvement is half of the previous value, and the stress distribution is more uniform and the structure is more reasonable. Brief Description of the Drawings
[0010] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:
[0011] Figure 1 It is a schematic structural diagram of the butterfly valve before improvement;
[0012] Figure 2 It is a schematic structural diagram of the whole of the present invention;
[0013] Figure 3 It is a schematic diagram of the finite element analysis of the structure before improvement;
[0014] Figure 4 It is a schematic diagram of the finite element analysis of the structure of the present invention;
[0015] In the figure: 1, valve body; 2, flange; 3, shaft end; 4, valve hole; 5, arc plate; 6, extension part. Detailed Description of the Preferred Embodiment
[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.
[0017] Given by Figures 1-4 The present invention includes a valve body 1, flanges 2 are respectively arranged at both ends of the valve body 1, a shaft end 3 is arranged on the side wall of the valve body 1, a valve hole 4 is opened in the shaft end 3, the valve hole 4 can penetrate through the inside and outside of the valve body 1, and a butterfly plate can be connected in the valve hole 4. It is characterized in that: an arc plate 5 is fixedly sleeved on the shaft end 3 in the circumferential direction, and the arc plate 5 is fixedly installed between the two flanges 2.
[0018] The radian of the arc plate 5 is equal to the radian of the valve body 1.
[0019] Both ends of the arc plate 5 are welded to the adjacent flanges 2.
[0020] Both ends of the arc plate 5 connected to the flange 2 are provided with extension parts 6, and the extension parts 6 can increase the support of the arc plate 5 for the shaft end 3.
[0021] Working principle: When the butterfly valve rotates the butterfly plate to close the valve, the water flow through the valve body 1 is cut off by the butterfly plate, and a large stress will be generated in the water flow direction. Since the rib plates of the cross ribs are small, the cross ribs will generate a large stress. By setting the arc plate 5, the stress range of the shaft end 3 can be increased. Therefore, the local average stress will be reduced a lot, reducing the influence of stress concentration and greatly improving the service life of the butterfly valve. Through finite element analysis, the maximum stress value in the local area of the improved shaft end 3 is half of the previous value, and the stress distribution is more uniform and the structure is more reasonable.
[0022] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.
[0023] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A butterfly valve with a novel shaft end support structure, comprising a valve body (1), flanges (2) are respectively provided at both ends of the valve body (1), a shaft end (3) is provided on the side wall of the valve body (1), a valve hole (4) is opened on the shaft end (3), the valve hole (4) can pass through the inside and outside of the valve body (1), and a butterfly plate can be connected to the valve hole (4), characterized in that: The shaft end (3) is circumferentially fixedly sleeved with an arc plate (5), and the arc plate (5) is fixedly installed between the two flanges (2).
2. According to the butterfly valve of the novel shaft end support structure of claim 1, it is characterized by: The curvature of the arc plate (5) is equal to the curvature of the valve body (1).
3. According to the butterfly valve of the novel shaft end support structure of claim 2, it is characterized by: The two ends of the arc plate (5) are respectively welded to adjacent flanges (2).
4. A butterfly valve with a novel shaft end support structure according to claim 3, characterized in that: Both ends of the arc plate (5) connected to the flange (2) are provided with extension parts (6), and the extension parts (6) can increase the support of the arc plate (5) to the shaft end (3).