High-performance butterfly valve with full-vacuum lining
By adding a radially outwardly side support part to the sealing ring to fix it with the upper and lower valve bodies, the problem of deformation of the sealing ring under negative pressure is solved, and the sealing performance and service life of the lining butterfly valve are improved.
Patent Information
- Application Number
- CN202422266138.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-18
AI Technical Summary
The existing lining butterfly valve sealing ring deforms or breaks due to loss of metal matrix support under negative pressure, resulting in valve leakage and seal failure.
A radially extended side support part is added to the seal ring and the upper and lower valve bodies are formed integrally, and fixed by fastening screws. The upper and lower ends of the seal ring are respectively pressed against the upper and lower ends of the butterfly plate to enhance the negative pressure resistance of the seal ring.
It improves the negative pressure resistance of the sealing ring, reduces deformation, and extends the service life of the lining butterfly valve.
Smart Images
Figure CN223049426U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an improved invention of a lined butterfly valve, in particular to an improved invention. Background Art
[0002] The lined butterfly valve installed on the lined pipeline has the structural characteristics of its own lining. Generally, the valve body structure is a split structure, that is, it is divided into an upper valve body and a lower valve body. The sealing ring is installed between the upper valve body and the lower valve body. The valve body serves as the metal base support of the sealing ring. The sealing ring and the fluorine-lined butterfly plate form a sealing pair to form a flow channel seal. The upper part of the sealing ring forms an axial seal with the stuffing box, stuffing, and stuffing gland of the upper valve body to isolate the contact between the corrosive medium of the pipeline and the metal base support of the valve, thereby preventing the metal base of the valve from being corroded by the corrosive medium of the pipeline.
[0003] When the pipeline has a certain negative pressure and the fluorine-lined butterfly disc is in the open state, the sealing ring loses the support of the metal matrix due to the change in the pressure direction, and then the sealing ring is deformed due to pressure, and even plastic deformation and rupture. In particular, the sealing ring is weaker due to the lack of butterfly disc support on both sides, which leads to valve leakage and even overall sealing failure and scrapping. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a high-performance full-vacuum lined butterfly valve.
[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: this kind of high-performance full vacuum lined butterfly valve includes an upper valve body, a lower valve body, a sealing ring, a butterfly plate and a packing sealing structure, the butt ends of the upper valve body and the lower valve body are connected by fastening screws, the sealing ring is installed in the upper valve body and the lower valve body, the butterfly plate is provided with a fluorine lining layer, and the fluorine lining layer and the sealing ring form a sealing pair, characterized in that: a radially outward-extending side support portion is provided on the sealing ring corresponding to the butt end of the upper valve body and the lower valve body, the side support portion and the sealing ring are integrally formed, the side support portion is pressed between the butt ends of the upper valve body and the lower valve body, and the fastening screw passes through the side support portion, and a positioning hole is opened on the corresponding side support portion, and the positioning hole matches the fastening screw.
[0006] The packing sealing structure comprises a packing and a gland arranged in the upper valve body, and the packing sealing structure and the upper part of the sealing ring form an axial seal.
[0007] The upper end of the butterfly plate is connected to the valve stem, and the valve stem passes through the sealing ring. The upper end of the corresponding sealing ring is provided with a cylindrical part, which is sealed with the valve stem, and the upper end of the corresponding sealing ring is pressed on the upper end of the butterfly plate.
[0008] The lower end of the butterfly plate is connected with a rotating column, and the corresponding lower valve body is provided with a rotating groove. The lower end of the sealing ring is matched and arranged in the rotating groove, and the corresponding lower end of the sealing ring is pressed on the lower end of the butterfly plate.
[0009] The beneficial effect of the utility model is an improved high-performance full-vacuum lined butterfly valve, which adds a side support portion integrally formed with the conventional lined butterfly valve sealing ring, and the side support portion is fixed to the upper valve body and the lower valve body together with fasteners, so that the weak points on both sides of the sealing ring are strengthened, and the upper and lower ends of the sealing ring are respectively pressed on the upper and lower ends of the butterfly plate. In the negative pressure pipeline, when the butterfly valve disc is in the open state, it can withstand the negative pressure from the pipeline, thereby improving the negative pressure resistance of the sealing ring, reducing the deformation of the sealing ring caused by negative pressure, and extending the service life of the lined butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.
[0011] Figure 1 It is a structural schematic diagram of the utility model.
[0012] Figure 2 This is the layout diagram of the sealing ring of the utility model.
[0013] Figure 3 For this utility model Figure 2 Side view of. DETAILED DESCRIPTION
[0014] The accompanying drawings show the structure of the utility model, and the following further describes its relevant details in conjunction with the accompanying drawings. Figures 1-3 The high-performance full vacuum lined butterfly valve comprises an upper valve body 3, a lower valve body 1, a sealing ring 4, a butterfly plate 5 and a packing sealing structure. The butt ends of the upper valve body 3 and the lower valve body 1 are connected by fastening screws 2. Specifically, the butt ends of the upper valve body 3 and the lower valve body 1 have a radial outer edge 11, and a mounting hole is provided on the radial outer edge. The upper and lower corresponding radial outer edges are connected by fastening screws 2; the sealing ring 4 is installed in the upper valve body 3 and the lower valve body 1 in a press-fitting manner as a lining, and the butterfly plate 5 is provided with a fluorine lining layer 10. The fluorine lining layer 10 and the sealing ring 4 form a sealing pair, and the sealing ring 4 corresponding to the butt end of the upper valve body 3 and the lower valve body 1 is provided with a radially outwardly extending side support portion 12, that is, the side support portions 12 are symmetrically added on both sides of the middle of the sealing ring 4, and the side support portions 12 and the sealing ring 4 are integrally formed. The side support portions 12 are pressed between the butt ends of the upper valve body 3 and the lower valve body 1, and the fastening screws 2 pass through the side support portions, and the corresponding side support portions 12 are provided with positioning holes 13, which match the fastening screws 2.
[0015] The working principle of the present utility model is that the side support portion 12, the upper valve body 3 and the lower valve body 1 are fixed together by fastening screws 2. When the butterfly valve disc 5 is in the open state in the negative pressure pipeline, since the side of the sealing ring 4 is supported and tightly fixed to the upper valve body 3 and the lower valve body 1, and the upper and lower ends of the sealing ring 4 are respectively pressed by the upper and lower ends of the disc 5, it can withstand the negative pressure from the pipeline, improve the negative pressure resistance performance of the sealing ring 4, reduce the deformation of the sealing ring 4 caused by the negative pressure, and extend the service life of the lined butterfly valve.
[0016] As a specific embodiment of further improvement, the packing seal structure includes a packing 6 and its gland 7 arranged in the upper valve body 3, and an axial seal is formed between the packing seal structure and the upper part of the sealing ring 4, that is, the cylindrical part at the upper end of the sealing ring 4.
[0017] As a specific embodiment of further improvement, the upper end of the disc 5 is connected to the valve stem 8, the valve stem 8 passes through the sealing ring 4, and a cylindrical part 14 is provided at the upper end of the corresponding sealing ring 4. The cylindrical part is in sealing cooperation with the valve stem, and the upper end of the corresponding sealing ring 4 is pressed by the upper end of the disc 5, that is, a support is formed for the upper end of the sealing ring 4.
[0018] As a specific embodiment of further improvement, the lower end of the disc 5 is connected with a rotating column 9, a rotating groove is provided on the corresponding lower valve body 1, the lower end of the sealing ring 4 is arranged in the rotating groove in a matching manner, and the lower end of the corresponding sealing ring 4 is pressed by the lower end of the disc 5, that is, a support is formed for the lower end of the sealing ring 4.
[0019] In summary, the above is only the preferred embodiment of the present utility model, and is not used to limit the protection scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.
Claims
1. A high-performance full vacuum lined butterfly valve, comprising an upper valve body, a lower valve body, a sealing ring, a butterfly plate and a packing sealing structure, wherein the butt ends of the upper valve body and the lower valve body are connected by fastening screws, the sealing ring is installed in the upper valve body and the lower valve body, the butterfly plate is provided with a fluorine lining layer, and the fluorine lining layer and the sealing ring form a sealing pair, characterized in that: A radially outwardly extending side support portion is provided on the sealing ring corresponding to the butt end of the upper valve body and the lower valve body, and the side support portion and the sealing ring are integrally formed. The side support portion is pressed between the butt ends of the upper valve body and the lower valve body, and the fastening screw passes through the side support portion. A positioning hole is opened on the corresponding side support portion, and the positioning hole matches the fastening screw.
2. The high performance full vacuum lined butterfly valve according to claim 1, characterized in that: The packing sealing structure comprises a packing and a gland arranged in the upper valve body, and the packing sealing structure and the upper part of the sealing ring form an axial seal.
3. The high performance full vacuum lined butterfly valve according to claim 1, characterized in that: The upper end of the butterfly plate is connected to the valve stem, and the valve stem passes through the sealing ring. The upper end of the corresponding sealing ring is provided with a cylindrical part, which is sealed with the valve stem, and the upper end of the corresponding sealing ring is pressed on the upper end of the butterfly plate.
4. The high performance full vacuum lined butterfly valve according to claim 1, characterized in that: The lower end of the butterfly plate is connected with a rotating column, and the corresponding lower valve body is provided with a rotating groove. The lower end of the sealing ring is matched and arranged in the rotating groove, and the corresponding lower end of the sealing ring is pressed on the lower end of the butterfly plate.