A ball check valve

Abstract

The utility model discloses a spherical check valve, the bonnet is arranged at the upper end of valve body, the inside intermediate rotation of valve body is connected with valve stem, and the upper end fixed thread column no.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, specifically a ball check valve. Background Technology

[0002] A ball check valve, also known as a backflow valve, non-return valve, back pressure valve, or one-way valve, is an automatic valve that opens and closes automatically by the force generated by the flow of the medium in the pipeline. The ball check valve is a type of automatic valve that uses a multi-ball, multi-channel, and multi-cone backflow structure. It is mainly composed of front and rear valve bodies, a ball, and a cone.

[0003] The existing ball check valve technology has some drawbacks: First, it is not easy to disassemble and maintain. When it is necessary to repair or replace parts, it often takes a lot of time and manpower, which affects work efficiency. Second, the sealing performance needs to be improved. During long-term use, media leakage is prone to occur, which can easily lead to media loss or affect the normal operation of the system. Utility Model Content

[0004] The purpose of this invention is to provide a spherical check valve to solve the problems mentioned in the background art, such as difficulty in disassembly and maintenance and poor sealing effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a spherical check valve, comprising a valve cover and a valve body, wherein the valve cover is disposed at the upper end of the valve body, a valve stem is rotatably connected to the middle of the valve body, and a threaded post is fixed to the upper end of the valve stem, a positioning cover is snapped onto the upper end of the valve stem, and a handle is fixed to one end of the positioning cover, a protective cover is disposed at the upper end of the positioning cover, and a nut is disposed at the upper end of the protective cover, and the nut is threadedly engaged with the threaded post, a support plate is fixed to the lower end of the protective cover, and guide blocks are fixed on both sides of the lower end of the support plate, so that the protective cover can be fitted onto the upper end of the valve stem, so that the front and rear protrusions of the upper end of the valve stem engage with the groove inside the protective cover, preventing displacement when the handle is turned. Fitting the protective cover onto the upper end of the protective cover can protect the handle, and screwing the nut into the threaded post can fix the position of the protective cover on the handle.

[0006] As a further technical solution of this utility model, the upper end of the valve cover is provided with an annular guide rail, and the annular guide rail is slidably connected to the guide block. The valve cover limits the guide block through the annular guide rail, which is conducive to the stable rotation of the handle.

[0007] As a further technical solution of this utility model, the upper end of the valve cover is provided with packing material one, and the lower end of packing material one is provided with packing material two. Packing material one is made of polytetrafluoroethylene, which has excellent chemical stability and corrosion resistance. Packing material two is made of flexible graphite, which has good sealing and self-lubricating properties. The two packing materials work together to improve the sealing effect of the valve cover and ensure the stable operation of the ball check valve.

[0008] As a further technical solution of this utility model, a valve ball is provided inside the valve body, and a flow guide groove is provided in the middle of the valve ball.

[0009] As a further technical solution of this utility model, an inlet is provided on one side of the valve body and an outlet is provided on the other side of the valve body. When the valve body is rotated to the point where the guide groove is connected to the inlet and outlet, the fluid can pass through. When the valve body is rotated to the point where the guide groove is misaligned with the inlet and outlet, the fluid is blocked, thus achieving the backflow prevention function.

[0010] As a further technical solution of this utility model, a flange is provided at the lower end of the valve cover, and threaded sleeves are provided at equal intervals on the upper edge of the flange.

[0011] As a further technical solution of this utility model, threaded post two is fixed on both sides of the upper end of the valve body, and the threaded post two is threadedly engaged with the threaded sleeve. The valve cover is put on the valve body, and the threaded sleeve is tightened on the threaded post two, so that the valve cover and the valve body are firmly connected, which facilitates the subsequent disassembly and assembly of the valve cover and the valve body, and provides convenience for the maintenance and upkeep of the ball check valve.

[0012] As a further technical solution of this utility model, a sealing gasket is provided in the middle of the upper end of the valve body, and a sealing ring is provided on the edge of the upper end of the valve body. The sealing gasket is made of rubber, which has good elasticity and sealing performance, and can effectively prevent leakage at the connection between the valve body and the valve cover. The sealing ring is made of fluororubber, which has excellent high temperature resistance, oil resistance, and chemical corrosion resistance, and enhances the sealing effect of the upper edge of the valve body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The protective cover can be placed over the upper end of the valve stem, allowing the protrusions at the front and rear of the upper end of the valve stem to engage with the groove inside the protective cover, preventing displacement when the handle is turned. The protective cover protects the handle, and a nut is screwed into the first threaded post to fix the position of the protective cover. Then, the valve cover is placed over the valve body, and the threaded sleeve is tightened onto the second threaded post, ensuring a secure connection between the valve cover and the valve body. This facilitates subsequent disassembly and assembly of the valve cover and valve body, providing convenience for the maintenance and upkeep of the ball check valve. When the valve body rotates to the point where the guide groove connects with the inlet and outlet, fluid flows through. When the valve body rotates to the point where the guide groove is misaligned with the inlet and outlet, the fluid is blocked, achieving the check valve function. This makes disassembly and maintenance easy.

[0015] The first packing material is made of polytetrafluoroethylene, which has excellent chemical stability and corrosion resistance. The second packing material is made of flexible graphite, which has good sealing and self-lubricating properties. The two packing materials work together to improve the sealing effect of the valve cover and ensure the stable operation of the ball check valve. In addition, the sealing gasket is made of rubber, which has good elasticity and sealing performance and can effectively prevent leakage at the connection between the valve body and the valve cover. The sealing ring is made of fluororubber, which has excellent high temperature resistance, oil resistance and chemical corrosion resistance, enhancing the sealing effect of the upper edge of the valve body, resulting in a good sealing effect. Attached Figure Description

[0016] Figure 1 This is a frontal sectional view of the present invention.

[0017] Figure 2 This is a front view structural diagram of the present utility model;

[0018] Figure 3 This is a cross-sectional view of the valve body and valve stem of this utility model.

[0019] Figure 4 This is a cross-sectional view of the valve cover structure of this utility model.

[0020] In the diagram: 1. Inlet; 2. Valve body; 3. Flange; 4. Threaded sleeve; 5. Valve cover; 6. Handle; 7. Protective cover; 8. Support plate; 9. Nut; 10. Threaded post one; 11. Positioning cover; 12. Guide block; 13. Annular guide rail; 14. Sealing ring; 15. Threaded post two; 16. Valve ball; 17. Outlet; 18. Guide groove; 19. Packing one; 20. Packing two; 21. Sealing gasket; 22. Valve stem. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 An embodiment of this utility model provides: a spherical check valve, including a valve cover 5 and a valve body 2. The valve cover 5 is disposed at the upper end of the valve body 2. A valve stem 22 is rotatably connected to the middle of the valve body 2. A threaded post 10 is fixed at the upper end of the valve stem 22. A positioning cover 11 is snapped onto the upper end of the valve stem 22. A handle 6 is fixed at one end of the positioning cover 11. A protective cover 7 is disposed at the upper end of the positioning cover 11. A nut 9 is disposed at the upper end of the protective cover 7. The nut 9 is threadedly engaged with the threaded post 10. A support plate 8 is fixed at the lower end of the protective cover 7. Guide blocks 12 are fixed on both sides of the lower end of the support plate 8.

[0023] Specifically, such as Figure 1 and Figure 2 As shown, the protective cover 7 can be placed on the upper end of the valve stem 22, so that the protrusions at the front and rear of the upper end of the valve stem 22 engage with the groove inside the protective cover 7, preventing the handle 6 from shifting when it is turned. The protective cover 7 can be placed on the upper end of the protective cover 7 to protect the handle 6. Then, the nut 9 can be screwed into the threaded post 10 to fix the position of the protective cover 7 on the handle 6.

[0024] The upper end of the valve cover 5 is provided with an annular guide rail 13, and the annular guide rail 13 is slidably connected to the guide block 12.

[0025] Specifically, such as Figure 1 and Figure 2 As shown, the valve cover 5 limits the guide block 12 through the annular guide rail 13, which helps the handle 6 to rotate stably.

[0026] The upper end of the valve cover 5 is provided with packing 19, and the lower end of packing 19 is provided with packing 20.

[0027] Specifically, such as Figure 1 and Figure 4 As shown, packing 19 is made of polytetrafluoroethylene, which has excellent chemical stability and corrosion resistance, while packing 20 is made of flexible graphite, which has good sealing and self-lubricating properties. The two packings work together to improve the sealing effect of the valve cover 5 and ensure the stable operation of the ball check valve.

[0028] The valve body 2 is provided with a valve ball 16 inside, and a guide groove 18 is provided in the middle of the valve ball 16. An inlet 1 is provided on one side of the valve body 2, and an outlet 17 is provided on the other side of the valve body 2.

[0029] Specifically, such as Figure 1 and Figure 3 As shown, when the valve body 2 rotates to the point where the guide groove 18 is connected to the inlet 1 and the outlet 17, the fluid can pass through. When the valve body 2 rotates to the point where the guide groove 18 is misaligned with the inlet 1 and the outlet 17, the fluid is blocked, thus achieving the check valve function.

[0030] A flange 3 is provided at the lower end of the valve cover 5, and threaded sleeves 4 are provided at equal intervals on the upper edge of the flange 3. Threaded post 15 is fixed on both sides of the upper end of the valve body 2, and the threaded post 15 is threadedly engaged with the threaded sleeve 4.

[0031] Specifically, such as Figure 1 and Figure 2 As shown, the valve cover 5 is placed on the valve body 2, and the threaded sleeve 4 is tightened onto the threaded post 15 to make the valve cover 5 and the valve body 2 firmly connected, which facilitates the subsequent disassembly and assembly of the valve cover 5 and the valve body 2, and provides convenience for the maintenance and upkeep of the ball check valve.

[0032] A sealing gasket 21 is provided in the middle of the upper end of the valve body 2, and a sealing ring 14 is provided on the edge of the upper end of the valve body 2.

[0033] Specifically, such as Figure 1 and Figure 3 As shown, the sealing gasket 21 is made of rubber, which has good elasticity and sealing performance, and can effectively prevent leakage at the connection between the valve body 2 and the valve cover 5. The sealing ring 14 is made of fluororubber, which has excellent high temperature resistance, oil resistance and chemical corrosion resistance, and enhances the sealing effect of the upper edge of the valve body 2.

[0034] Working principle: In use, the protective cover 7 can be placed on the upper end of the valve stem 22, so that the front and rear protrusions of the upper end of the valve stem 22 engage with the groove inside the protective cover 7, preventing displacement when the handle 6 is turned. Placing the protective cover 7 on the upper end of the protective cover 7 protects the handle 6. Then, screwing the nut 9 into the threaded post 10 fixes the position of the protective cover 7 on the handle 6. Next, the valve cover 5 is placed on the valve body 2, and the threaded sleeve 4 is tightened onto the threaded post 15, ensuring a secure connection between the valve cover 5 and the valve body 2. This facilitates subsequent disassembly and assembly of the valve cover 5 and valve body 2, providing convenience for the maintenance and upkeep of the ball check valve. Then, when the valve body 2 rotates to the point where the guide groove 18 connects with the inlet 1 and outlet 17, allowing fluid to pass through, when the valve body 2 rotates to the point where the guide groove 18 is misaligned with the inlet 1 and outlet 17... The fluid is blocked, achieving a check valve function. Furthermore, the valve cover 5, via the annular guide rail 13, limits the guide block 12, facilitating stable rotation of the handle 6. The packing material 19 is made of polytetrafluoroethylene, possessing excellent chemical stability and corrosion resistance, while the packing material 20 is made of flexible graphite, exhibiting good sealing and self-lubricating properties. The two packing materials work together to enhance the sealing effect of the valve cover 5, ensuring the stable operation of the ball check valve. Additionally, the sealing gasket 21 is made of rubber, possessing good elasticity and sealing performance, effectively preventing leakage at the connection between the valve body 2 and the valve cover 5. The sealing ring 14 is made of fluororubber, exhibiting excellent high-temperature resistance, oil resistance, and chemical corrosion resistance, enhancing the sealing effect of the upper edge of the valve body 2. In summary, this check valve is easy to disassemble and maintain, and provides excellent sealing performance.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A spherical check valve, comprising a valve cover (5) and a valve body (2), characterized in that: The valve cover (5) is located at the upper end of the valve body (2). A valve stem (22) is rotatably connected in the middle of the valve body (2). A threaded post (10) is fixed at the upper end of the valve stem (22). A positioning cover (11) is snapped onto the upper end of the valve stem (22). A handle (6) is fixed at one end of the positioning cover (11). A protective cover (7) is provided at the upper end of the positioning cover (11). A nut (9) is provided at the upper end of the protective cover (7). The nut (9) is threadedly engaged with the threaded post (10). A support plate (8) is fixed at the lower end of the protective cover (7). Guide blocks (12) are fixed on both sides of the lower end of the support plate (8).

2. A spherical check valve according to claim 1, characterized in that: The upper end of the valve cover (5) is provided with an annular guide rail (13), and the annular guide rail (13) is slidably connected to the guide block (12).

3. A spherical check valve according to claim 2, characterized in that: The upper end of the valve cover (5) is provided with packing material one (19), and the lower end of the packing material one (19) is provided with packing material two (20).

4. A spherical check valve according to claim 1, characterized in that: The valve body (2) is provided with a valve ball (16) inside, and a flow guide groove (18) is provided in the middle of the valve ball (16).

5. A spherical check valve according to claim 4, characterized in that: The valve body (2) has an inlet (1) on one side and an outlet (17) on the other side.

6. A spherical check valve according to claim 3, characterized in that: The lower end of the valve cover (5) is provided with a flange (3), and the upper edge of the flange (3) is provided with threaded sleeves (4) at equal intervals.

7. A spherical check valve according to claim 5, characterized in that: Both sides of the upper end of the valve body (2) are fixed with threaded post two (15), and the threaded post two (15) is threadedly engaged with the threaded sleeve (4).

8. A spherical check valve according to claim 1, characterized in that: A sealing gasket (21) is provided in the middle of the upper end of the valve body (2), and a sealing ring (14) is provided on the edge of the upper end of the valve body (2).

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