Leak-proof butterfly valve

Abstract

The utility model provides an anti-leakage butterfly valve. The anti-leakage butterfly valve comprises a valve body, a valve rod and a valve rod, wherein the valve body is provided with a fluid channel and a mounting opening; the mounting opening is communicated with the fluid channel; the valve rod extends into the fluid channel through the mounting opening; the valve seat is arranged on the inner wall of the fluid channel; the valve plate is arranged on the valve rod and located in the fluid channel; a conical channel is formed between the valve plate and the valve seat; the first sealing gasket is arranged in the conical channel; the first sealing gasket is provided with a first conical surface abutting against the conical channel. The valve cover is arranged on the mounting opening in a covering manner and presses one end of the valve rod; and the positioning bolt is arranged between the valve cover and the valve rod and is connected with the valve rod. The leakproof butterfly valve is good in sealing performance and not prone to leakage.

Description

Technical Field

[0001] This application relates to the field of valve technology, and more specifically, to a leak-proof butterfly valve. Background Technology

[0002] A butterfly valve includes components such as a valve body, valve stem, valve cover, and valve plate. The valve stem is installed in the valve body and is fixed by the valve cover.

[0003] However, the following problems exist in actual use:

[0004] A counter-ring is installed between the valve stem and the valve cover to limit the rotation angle and position of the valve stem. However, the large clearance of the counter-ring allows for leakage during use due to vibration and other factors. Furthermore, the sealing surface between the valve plate and the valve body deforms under stress, further amplifying the leakage. Utility Model Content

[0005] This application aims to address at least one of the technical problems existing in the related art.

[0006] Therefore, this application proposes a leak-proof butterfly valve, comprising: a valve body having a fluid passage and an installation opening; the installation opening communicating with the fluid passage; a valve stem extending into the fluid passage through the installation opening; a valve seat disposed on the inner wall of the fluid passage; a valve plate disposed on the valve stem and located within the fluid passage; a conical channel formed between the valve plate and the valve seat; a first sealing gasket disposed within the conical channel; the first sealing gasket having a first conical surface abutting against the conical channel; a valve cover covering the installation opening and pressing against one end of the valve stem; and a positioning bolt disposed between the valve cover and the valve stem and connected to the valve stem.

[0007] The valve stem is connected via positioning bolts. The threaded structure itself has excellent anti-loosening properties, maintaining a tight grip even under frequent operation and vibration of the leak-proof butterfly valve. This prevents the valve stem from loosening during operation and ensures the normal operation of the leak-proof butterfly valve. Compared to some other positioning methods, positioning bolts provide more reliable tightening force, reducing the risk of leakage and equipment failure due to loosening. Furthermore, the threaded connection allows operators to easily adjust the position of the valve stem during installation and commissioning as needed. Simply loosening the positioning bolts allows for easy rotation of the valve stem to adjust the valve plate to the appropriate angle, followed by tightening the positioning bolts for secure fixing – a simple and quick operation. When system conditions change or maintenance is required, the operating state of the leak-proof butterfly valve can be easily altered by adjusting the positioning bolts. The bolts precisely limit the rotation angle and position of the valve stem, ensuring the valve plate accurately opens and closes to the set position, thereby achieving precise control of fluid flow and ensuring stable system operation according to design requirements. A conical channel is formed between the valve plate and the valve seat, and a conical sealing gasket is used for sealing. Compared with a flat sealing gasket, the conical sealing ring can rely on the self-tightening effect generated by the conical structure when subjected to pressure. It can adapt to minor deformations, unevenness or installation errors of the sealing surface and is not easily displaced or loosened due to vibration. Moreover, it fits more tightly with the sealing surface as the pressure increases, resulting in a better sealing effect and effectively reducing leakage. It is especially suitable for high-pressure conditions.

[0008] In some technical solutions, optionally, the inner wall of the installation opening is provided with a first step; the positioning bolt abuts against the first step.

[0009] This design further ensures the stability and reliability of the positioning bolts. Specifically, the first step provides a support surface for the positioning bolts, preventing axial displacement during operation and thus enhancing the valve stem's fixation. The presence of the first step also simplifies the installation and commissioning process. When adjusting the valve stem position, the operator simply loosens the positioning bolts, rotates the valve stem to the desired angle, and then retightens the positioning bolts until they abut against the first step. This design not only improves operational convenience but also ensures the valve stem remains stable after adjustment, preventing loosening due to vibration or frequent operation.

[0010] In some technical solutions, optionally, grooves are provided on the opposite end faces of the valve cover and the valve stem; the positioning bolt includes: a connecting part, which is screwed to the valve stem; a limiting part, which is connected to the connecting part and abuts against the first step; and a positioning part, which is connected to the limiting part and located in the groove.

[0011] In the above technical solution, the groove provides a fixed receiving space for the positioning part, ensuring that the positioning bolt will not shift or loosen during operation.

[0012] In some technical solutions, optionally, a second step is provided on the inner wall of the installation opening; a second sealing gasket is provided between the second step and the valve cover.

[0013] In practical applications, the second sealing gasket effectively prevents fluid leakage from the installation opening, especially under high pressure or high vibration conditions, which can significantly improve the sealing reliability of the leak-proof butterfly valve.

[0014] In some technical solutions, optionally, the valve plate is provided with a mounting groove; the side of the mounting groove away from the valve stem is inclined; the first sealing gasket extends into the mounting groove, and the first sealing gasket is provided with a second conical surface that abuts against the inclined surface.

[0015] In the above technical solution, this inclined surface design provides a self-tightening support surface for the first sealing gasket; the second conical surface forms a conical fit with the inclined surface of the mounting groove, which enhances the sealing effect and ensures that a good sealing effect can be maintained under various working conditions.

[0016] In some technical solutions, the valve plate and valve stem are optionally connected by a locating pin.

[0017] In some technical solutions, the valve cover and valve body are optionally connected and fixed by connecting bolts.

[0018] In the above technical solution, the connection method of the positioning pin and the connecting bolt is simple and reliable, and the installation and disassembly are convenient, which reduces the difficulty of installation and maintenance.

[0019] 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

[0020] 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:

[0021] Figure 1 One of the structural schematic diagrams of the anti-leakage butterfly valve in the embodiments of this application is shown;

[0022] Figure 2 A second schematic diagram of the anti-leakage butterfly valve in an embodiment of this application is shown;

[0023] Figure 3 The third schematic diagram of the anti-leakage butterfly valve in the embodiments of this application is shown.

[0024] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0025] 100 Valve body; 110 Fluid passage; 121 First step; 122 Second step; 200 Valve stem; 300 Valve seat; 400 Valve plate; 410 Mounting groove; 420 Positioning pin; 500 First sealing gasket; 600 Valve cover; 610 Groove; 700 Positioning bolt; 710 Connecting part; 720 Limiting part; 730 Positioning part; 800 Second sealing gasket; 900 Connecting bolt. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] The following is combined Figures 1 to 3 The present application provides a detailed description of an anti-leakage butterfly valve through specific embodiments and application scenarios.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of this application provides a leak-proof butterfly valve, including: valve body 100, valve stem 200, valve seat 300, valve plate 400, first sealing gasket 500, valve cover 600 and positioning bolt 700.

[0030] Specifically, the valve body 100 is provided with a fluid passage 110 and a mounting opening, the mounting opening communicating with the fluid passage 110. The valve stem 200 extends into the fluid passage 110 through the mounting opening. The valve seat 300 is disposed on the inner wall of the fluid passage 110. The valve plate 400 is disposed on the valve stem 200 and located within the fluid passage 110; a conical channel is formed between the valve plate 400 and the valve seat 200. The first sealing gasket 500 is disposed within the conical channel, and the first sealing gasket 500 has a first conical surface that abuts against the conical channel. The valve cover 600 covers the mounting opening and presses against one end of the valve stem 200. The positioning bolt 700 is disposed between the valve cover 600 and the valve stem 200 and is connected to the valve stem 200.

[0031] In the above embodiment, the valve stem 200 is connected by a positioning bolt 700. The threaded structure itself has good anti-loosening performance, maintaining a tight state even under frequent operation and vibration of the anti-leakage butterfly valve, preventing the valve stem 200 from loosening during operation, and ensuring the normal operation of the anti-leakage butterfly valve. Compared with some other positioning methods, the positioning bolt 700 can provide more reliable tightening force, reducing the risk of leakage and equipment failure caused by loosening. At the same time, during installation and commissioning, the threaded connection also makes it convenient for operators to adjust the position of the anti-leakage butterfly valve stem according to actual needs. Simply loosening the positioning bolt 700 allows the valve stem 200 to be easily rotated, thereby adjusting the valve plate 400 to a suitable angle, and then tightening the positioning bolt 700 to fix it, making the operation simple and quick. When the system operating conditions change or maintenance of the anti-leakage butterfly valve is required, the working state of the anti-leakage butterfly valve can be easily changed by adjusting the positioning bolt 700. The rotation angle and position of the anti-leakage butterfly valve stem 200 can be precisely limited, ensuring that the valve plate 400 is accurately opened and closed to the set position, thereby achieving precise control of fluid flow and ensuring that the system operates stably according to design requirements.

[0032] A conical channel is formed between the valve plate 400 and the valve seat 300, and a conical sealing gasket is used for sealing. Compared with a flat sealing gasket, the conical sealing ring can rely on the self-tightening effect generated by the conical structure when subjected to pressure. It can adapt to minor deformations, unevenness or installation errors of the sealing surface and is not easily displaced or loosened due to vibration. As the pressure increases, it fits more tightly with the sealing surface, resulting in a better sealing effect and effectively reducing leakage. It is especially suitable for high-pressure conditions.

[0033] In some embodiments, a first step 121 is provided on the inner wall of the mounting opening, and the positioning bolt 700 abuts against the first step 121. This design further ensures the stability and reliability of the positioning bolt 700. Specifically, the first step 121 provides a support surface for the positioning bolt 700, preventing axial displacement during operation, thereby enhancing the fixing effect of the valve stem 200. The presence of the first step 121 also simplifies the installation and commissioning process. When adjusting the position of the valve stem 200, the operator only needs to loosen the positioning bolt 700, rotate the valve stem 200 to the desired angle, and then retighten the positioning bolt 700 until it abuts against the first step 121. This design not only improves the convenience of operation but also ensures that the valve stem 200 remains stable in the adjusted position, avoiding loosening due to vibration or frequent operation.

[0034] In the above embodiment, the valve cover 600 and the valve stem 200 have grooves 610 on their opposite end faces, and the positioning bolt 700 includes a connecting part 710, a limiting part 720 and a positioning part 730.

[0035] Specifically, the connecting part 710 is screwed to the valve stem 200. The limiting part 720 is connected to the connecting part 710 and abuts against the first step 121. The positioning part 730 is connected to the limiting part 720 and is located within the groove 610.

[0036] In the above embodiment, during installation, firstly, the connecting portion 710 of the positioning bolt 700 is threadedly connected to the valve stem 200 to ensure that the positioning bolt 700 is firmly fixed to the valve stem 200. Next, the limiting portion 720 of the positioning bolt 700 abuts against the first step 121 on the inner wall of the mounting opening. The limiting portion 720 prevents the positioning bolt 700 from shifting in the axial direction. Finally, the positioning portion 730 of the positioning bolt 700 is embedded into the groove 610 on the end face of the valve cover 600. The groove 610 provides a fixed receiving space for the positioning portion 730, ensuring that the positioning bolt 700 will not shift or loosen during operation.

[0037] In some embodiments, the leak-proof butterfly valve further includes a second sealing gasket 800. A second step 122 is provided on the inner wall of the mounting opening. The second sealing gasket 800 is disposed between the second step 122 and the valve cover 600.

[0038] In practical applications, the second sealing gasket 800 effectively prevents fluid leakage from the installation opening, especially under high pressure or high vibration conditions, which can significantly improve the sealing reliability of the leak-proof butterfly valve.

[0039] In some embodiments, the valve plate 400 is provided with a mounting groove 410. The side of the mounting groove 410 away from the valve stem 200 is inclined. A first sealing gasket 500 extends into the mounting groove 410, and the first sealing gasket 500 is provided with a second conical surface that abuts against the inclined surface.

[0040] In the above embodiment, the side of the mounting groove 410 away from the valve stem 200 is inclined. This inclined design provides a self-tightening support surface for the first sealing gasket 500. The second conical surface forms a conical fit with the inclined surface of the mounting groove 410, which enhances the sealing effect and ensures that a good sealing effect can be maintained under various working conditions.

[0041] In some embodiments, valve stem 400 and valve stem 200 are connected as one unit by a locating pin 420.

[0042] Specifically, the valve plate 400 and valve stem 200 are respectively provided with corresponding pin holes, and the positioning pin 420 passes through these pin holes to fix the valve plate 400 and valve stem 200 together. The connection method of the positioning pin 420 is simple and reliable, and easy to install and disassemble, reducing the difficulty of installation and maintenance. During maintenance, the operator can replace the valve plate 400 by disassembling the positioning pin 420, reducing maintenance time and cost.

[0043] In some embodiments, the valve cover 600 and the valve body 100 are connected and fixed by connecting bolts 900.

[0044] Specifically, the valve cover 600 and the valve body 100 are respectively provided with corresponding bolt holes. The connecting bolts 900 pass through these bolt holes to fix the valve cover 600 and the valve body 100 together. The connection method of the connecting bolts 900 is simple and reliable, and easy to install and disassemble, reducing the difficulty of installation and maintenance.

[0045] 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.

[0046] 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.

[0047] 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 leak-proof butterfly valve, characterized in that, The utility model relates to a valve, which comprises: a valve body provided with a fluid passage and a mounting opening; a valve stem extending into the fluid passage through the mounting opening; a valve seat arranged on the inner wall of the fluid passage; a valve plate arranged on the valve stem and located in the fluid passage, a tapered passage being formed between the valve plate and the valve seat; a first sealing gasket arranged in the tapered passage, the first sealing gasket being provided with a first tapered surface abutting against the tapered passage; a valve cover covering the mounting opening and pressing one end of the valve stem; a positioning bolt arranged between the valve cover and the valve stem and connected with the valve stem.

2. The leak-proof butterfly valve of claim 1, wherein, The inner wall of the mounting opening is provided with a first step. The positioning bolt abuts against the first step.

3. The leak-proof butterfly valve of claim 2, wherein, The opposite end faces of the valve cover and the valve stem are provided with grooves. The positioning bolt comprises: a connecting portion screwed with the valve stem; a limiting portion connected with the connecting portion and abutting against the first step; 4. The leak-proof butterfly valve of claim 1, wherein, a positioning portion connected with the limiting portion and located in the groove. The inner wall of the mounting opening is provided with a second step.

5. The leak-proof butterfly valve of claim 1, wherein, A second sealing gasket is arranged between the second step and the valve cover.

6. The leak-proof butterfly valve of claim 1, wherein, The valve plate is provided with a mounting groove, the side of the mounting groove away from the valve stem being inclined, the first sealing gasket extending into the mounting groove, and the first sealing gasket being provided with a second tapered surface abutting against the inclined surface.

7. The leak-proof butterfly valve of claim 1, wherein, The valve plate and the valve stem are connected by a positioning pin shaft. The valve cover and the valve body are connected and fixed by a connecting bolt.

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