Plastic ball valve for corrosion-resistant gas
By introducing sealing gaskets and bolt connections into the plastic ball valve, combined with the design of magnets and elastic sealing materials, the sealing and reliability problems of traditional metal valves in corrosive gas environments are solved, achieving efficient corrosion resistance and stable operation of the plastic ball valve.
Patent Information
- Application Number
- CN202423254994.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-28
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-28
AI Technical Summary
Traditional metal valves are prone to corrosion when exposed to corrosive gases, resulting in reduced structural strength, poor sealing performance, and are also heavy, inconvenient to install, and costly. Plastic ball valves present challenges in terms of connection sealing, valve opening and closing reliability, and structural stability.
The valve uses a plastic ball valve designed for corrosion-resistant gases. It achieves precise opening and closing by using a sealing gasket and bolts between the valve body and the connecting pipe. The valve is precisely opened and closed by the synergistic action of components such as magnets, support blocks, sleeves, slide rods, iron plates, and springs. The valve seat, made of elastic sealing material, ensures a tight seal.
It improves the sealing performance and stability of valves in corrosive gas environments, reduces maintenance costs and frequency, ensures the corrosion resistance of valves in both open and closed states, and enhances structural stability and reliability.
Smart Images
Figure CN223498762U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plastic ball valve technology, and in particular to a plastic ball valve for corrosion-resistant gases. Background Technology
[0002] In industrial production and many special applications, it is often necessary to handle corrosive gases.
[0003] Traditional metal valves are prone to corrosion when exposed to corrosive gases, leading to reduced structural strength and poor sealing performance, which in turn affects the safety and reliability of the entire pipeline system. Moreover, metal valves are often heavy, inconvenient to install, and relatively expensive. With the continuous development of plastic material technology, plastic ball valves have emerged. Plastic materials have good corrosion resistance and can effectively resist the erosion of various corrosive gases. However, they still face many challenges in terms of connection sealing, valve opening and closing reliability, and structural stability.
[0004] Therefore, we propose a plastic ball valve for use with corrosive gases. Utility Model Content
[0005] The main objective of this invention is to provide a plastic ball valve for use with corrosive gases. This is to prevent traditional metal valves from being corroded by corrosive gases, which would lead to decreased structural strength, poor sealing performance, and compromise the safety and reliability of pipeline systems. It also addresses the problems of heavy weight, inconvenient installation, and high cost associated with metal valves. Furthermore, it aims to solve the challenges faced by plastic ball valves in terms of connection sealing, valve opening and closing reliability, and structural stability. This will improve the overall performance of the valve when handling corrosive gases, including corrosion resistance, sealing, reliability, and stability, effectively solving the problems in the prior art.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] A plastic ball valve for corrosion-resistant gases includes a valve body and connecting pipes. The valve body has a first flange at both ends. Two connecting pipes are provided, with a second flange for connection to the first flange at the end closest to the valve body. A first sleeve plate and a second sleeve plate are fitted onto the outer circumferential wall of both the first and second flanges. Sealing gaskets that fit the first and second flanges are provided on the inner sidewalls of the first and second sleeve plates. Two symmetrical first connecting plates and second connecting plates are respectively provided on the outer circumferential wall of the first and second sleeve plates. The two first connecting plates are respectively fitted onto their corresponding second connecting plates and connected by bolts.
[0008] A valve ball is rotatably connected to the center of the inner cavity of the valve body. A magnet is installed on the outside of the valve ball. Two symmetrical support blocks are installed in the inner cavity of the valve body, and the support blocks are located at both ends of the valve body. Multiple fixing rods are fixedly connected to the outer side of each of the two support blocks. The ends of the multiple fixing rods away from the support blocks are fixedly connected to the inner wall of the valve body. A sleeve is fixedly connected to the ends of the two support blocks away from the valve ball. A sliding rod is slidably connected to the sleeve. The other end of the sliding rod is fixedly connected to an iron plate. A spring is sleeved on the outer wall of the sleeve and the sliding rod. Two limiting rings are fixedly connected in the inner cavity of the valve body. A central ring hole is opened at the center of each of the two limiting rings. The diameter of the iron plate is larger than the diameter of the central ring hole. A stainless steel plate is installed at the end of the iron plate away from the limiting ring.
[0009] By adopting the above technical solution, when it is necessary to connect the connecting pipe to the valve body, the second flange at one end of the connecting pipe is aligned with the first flange at both ends of the valve body. The first and second sleeves are fitted onto the outer circumferential walls of the first and second flanges. The sealing gaskets on their inner walls can ensure the sealing of the connection and prevent the leakage of corrosive gases. Then, the two first connecting plates on the first sleeve are attached to the two corresponding second connecting plates on the second sleeve, and they are connected by bolts, thereby achieving a tight connection between the connecting pipe and the valve body.
[0010] When the valve needs to be opened, the pressure on the iron plate and stainless steel plate that were originally attached to the limit ring is reduced during the rotation of the valve ball because the magnet is installed on the outside of the valve ball. At this time, under the action of the spring force, the slide rod slides in the sleeve, and the iron plate and stainless steel plate move away from the limit ring, so that the channel gradually opens and the corrosive gas can pass through the valve body from the connecting pipe.
[0011] When the valve needs to be closed, the valve ball rotates in the opposite direction. When the valve ball rotates to the closed position, the valve ball will pull the moving iron plate and stainless steel plate closer to the limit ring under the action of magnetic force, overcoming the elastic force of the spring, so that the slide rod slides in the sleeve until the iron plate is tightly attached to the limit ring, closing the passage and preventing corrosive gas from passing through; at the same time, due to the presence of the sealing gasket, the sealing of the connection part is also ensured, preventing gas from leaking from the connection part.
[0012] Furthermore, a lower valve stem is fixedly connected to the bottom end of the valve ball.
[0013] By adopting the above technical solution, the lower valve stem is fixed to the bottom of the valve ball, and it can play a role in balancing the force on the valve ball during the rotation of the valve ball.
[0014] Furthermore, an upper valve stem is fixedly connected to the top of the valve ball.
[0015] By adopting the above technical solution, the upper valve stem is fixedly connected to the valve ball, which enables it to directly transmit external forces to control the rotation of the valve ball.
[0016] Furthermore, the top end of the upper valve stem extends to the outside of the valve body and is fixedly connected to a handle.
[0017] By adopting the above technical solution, when it is necessary to open the plastic ball valve for corrosive gas, the operator can hold the handle and apply a turning torque. Since the handle is fixedly connected to the upper valve stem, the rotation of the handle will directly drive the upper valve stem to rotate around its axis. The upper valve stem is fixedly connected to the valve ball, so the valve ball will rotate synchronously with the upper valve stem. As the valve ball rotates, when its internal channel gradually aligns with the inlet and outlet channels at both ends of the valve body, the corrosive gas can pass smoothly through the valve body, realizing the valve opening operation and allowing the gas to flow between the connecting pipes.
[0018] Conversely, when the valve is to be closed, the operator turns the handle in the opposite direction, causing the upper valve stem to rotate in the opposite direction, which in turn causes the valve ball to rotate in the opposite direction. As the valve ball rotates, when the solid part of the valve ball moves between the inlet and outlet channels of the valve body, the channel is completely blocked, preventing the flow of corrosive gas and thus closing the valve, ensuring that gas cannot pass through the valve body.
[0019] Furthermore, a valve seat that contacts and engages with the valve ball is provided in the inner cavity of the valve body.
[0020] By adopting the above technical solution, when the valve is in the closed position, the valve ball will fit tightly against the valve seat. Under the pressure of corrosive gas, the valve ball applies a certain pressure to the valve seat, so that the contact surface between the two can effectively prevent gas from leaking out from the gap between the valve ball and the valve body cavity, thereby ensuring the sealing of the valve when closed and preventing corrosive gas from leaking into the external environment or pipeline areas that should not pass through.
[0021] Furthermore, the valve seat is made of an elastic sealing material.
[0022] By adopting the above technical solution, when the valve is closed, the valve ball contacts the valve seat. Since the valve seat is made of elastic sealing material, it can adaptively deform according to the shape and surface condition of the valve ball.
[0023] Compared with the prior art, the present invention has the following beneficial effects:
[0024] (1) This utility model provides a plastic ball valve for corrosion-resistant gases. The first flange and the second flange are fitted with a first sleeve plate and a second sleeve plate on their outer circumferential walls. The sealing gasket on the inner side wall of the first flange can be tightly fitted to the flange surface, effectively preventing the leakage of corrosive gases from the connection. This connection structure ensures sealing while being easy to install. Through the fitting of the first connecting plate and the second connecting plate and the bolt connection, the connecting pipe and the valve body can be tightly connected, which improves the stability of the entire valve structure and reduces the safety hazards caused by loose connection.
[0025] (2) This utility model discloses a plastic ball valve for corrosion-resistant gases. The valve achieves precise control of opening and closing through the rotation of the valve ball and the coordinated action of the magnet, support block, sleeve, slide rod, iron plate, stainless steel plate and spring. When the valve is opened, the rotation of the valve ball causes the iron plate and stainless steel plate to move away from the limit ring under the action of the spring force, and the channel is opened smoothly, allowing the corrosive gas to flow. When the valve is closed, the valve ball pulls the iron plate and stainless steel plate to fit tightly against the limit ring under the action of the magnetic force, effectively closing the channel and preventing the gas from passing through. The whole process is convenient to operate and has reliable sealing performance. Whether the valve is open or closed, it can effectively prevent the leakage of corrosive gas, greatly improve the performance and life of the valve in corrosive gas environment, and reduce maintenance costs and frequency. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the connection structure of a plastic ball valve for corrosion-resistant gases according to this utility model.
[0027] Figure 2 This is a schematic diagram of the valve body structure of a plastic ball valve for corrosion-resistant gases according to this utility model.
[0028] Figure 3 This is a schematic diagram of the internal structure of a plastic ball valve for corrosion-resistant gases according to this utility model.
[0029] Figure 4 This utility model relates to a plastic ball valve for corrosion-resistant gases. Figure 3 Enlarged view of point A in the middle.
[0030] In the diagram: 1. Valve body; 2. First flange; 3. First sleeve plate; 4. Second sleeve plate; 5. First connecting plate; 6. Second connecting plate; 7. Sealing gasket; 8. Valve ball; 9. Magnet; 10. Support block; 11. Fixing rod; 12. Sleeve; 13. Slide rod; 14. Spring; 15. Iron plate; 16. Stainless steel plate; 17. Limiting ring; 18. Upper valve stem; 19. Lower valve stem; 20. Handle; 21. Valve seat; 22. Connecting pipe; 23. Second flange. Detailed Implementation
[0031] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0032] In order to, thus, as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a plastic ball valve for corrosion-resistant gases includes a valve body 1 and a connecting pipe 22. Both ends of the valve body 1 are provided with a first flange 2. Two connecting pipes 22 are provided, with a second flange 23 for connecting to the first flange 2 at the end of each connecting pipe 22 closest to the valve body 1. A first sleeve plate 3 and a second sleeve plate 4 are fitted onto the outer circumferential walls of both the first flange 2 and the second flange 23. Sealing gaskets 7 are provided on the inner sidewalls of the first sleeve plate 3 and the second sleeve plate 4 to fit against the first flange 2 and the second flange 23. Two symmetrical first connecting plates 5 and second connecting plates 6 are respectively provided on the outer circumferential walls of the first sleeve plate 3 and the second sleeve plate 4. The two first connecting plates 5 are respectively fitted against the corresponding second connecting plates 6 and connected by bolts.
[0033] A valve ball 8 is rotatably connected to the center of the inner cavity of the valve body 1. A magnet 9 is provided on the outside of the valve ball 8. Two symmetrical support blocks 10 are provided in the inner cavity of the valve body 1, and the support blocks 10 are located at both ends of the valve body 1. Multiple fixing rods 11 are fixedly connected to the outside of the two support blocks 10. The ends of the multiple fixing rods 11 away from the support blocks 10 are fixedly connected to the inner cavity wall of the valve body 1. A sleeve 12 is fixedly connected to the ends of the two support blocks 10 away from the valve ball 8. A sliding rod 13 is slidably connected to the sleeve 12. The other end of the sliding rod 13 is fixedly connected to the iron plate 15. A spring 14 is sleeved on the outer wall of the sleeve 12 and the sliding rod 13. Two limiting rings 17 are fixedly connected in the inner cavity of the valve body 1. A central ring hole is opened at the center of the two limiting rings 17. The diameter of the iron plate 15 is larger than the diameter of the central ring hole. A stainless steel plate 16 is provided at the end of the iron plate 15 away from the limiting rings 17.
[0034] When it is necessary to connect the connecting pipe 22 to the valve body 1, align the second flange 23 at one end of the connecting pipe 22 with the first flange 2 at both ends of the valve body 1. The first sleeve plate 3 and the second sleeve plate 4 are fitted on the outer circumferential wall of the first flange 2 and the second flange 23. The sealing gasket 7 on the inner side wall can ensure the sealing of the connection and prevent the leakage of corrosive gas. Then, the two first connecting plates 5 on the first sleeve plate 3 and the two corresponding second connecting plates 6 on the second sleeve plate 4 are attached together and connected by bolts, thereby achieving a tight connection between the connecting pipe 22 and the valve body 1.
[0035] When the valve needs to be opened, since the valve ball 8 is equipped with a magnet 9 on the outside, the pressure on the iron plate 15 and stainless steel plate 16 that were originally attached to the limit ring 17 is reduced during the rotation of the valve ball 8. At this time, under the elastic force of the spring 14, the slide rod 13 slides in the sleeve 12, and the iron plate 15 and stainless steel plate 16 move away from the limit ring 17, so that the channel gradually opens and the corrosive gas can pass through the valve body 1 from the connecting pipe 22.
[0036] When the valve needs to be closed, the valve ball 8 rotates in the opposite direction. When the valve ball 8 rotates to the closed position, the valve ball 8 will pull the moving iron plate 15 and the stainless steel plate 16 closer to the limiting ring 17 under the action of magnetic force, overcoming the elastic force of the spring 14, so that the slide rod 13 slides in the sleeve 12 until the iron plate 15 is tightly attached to the limiting ring 17, closing the passage and preventing corrosive gas from passing through; at the same time, due to the presence of the sealing gasket 7, the sealing of the connection part is also guaranteed, preventing gas from leaking from the connection part.
[0037] For example, such as Figure 3 As shown, the present invention also includes a lower valve stem 19 fixedly connected to the bottom end of the valve ball 8.
[0038] During use, the lower valve stem 19 is fixed to the bottom of the valve ball 8. During the rotation of the valve ball 8, it can balance the force on the valve ball 8.
[0039] For example, such as Figure 3 As shown, the present invention also includes an upper valve stem 18 fixedly connected to the top of the valve ball 8.
[0040] In use, the upper valve stem 18 is fixedly connected to the valve ball 8, which allows it to directly transmit external force to control the rotation of the valve ball 8.
[0041] For example, such as Figure 3 As shown, the present invention also includes a handle 20, wherein the top end of the upper valve stem 18 extends to the outside of the valve body 1 and is fixedly connected to it.
[0042] When using the plastic ball valve for corrosive gases, the operator can hold the handle 20 and apply a turning torque. Since the handle 20 is fixedly connected to the upper valve stem 18, the rotation of the handle 20 will directly drive the upper valve stem 18 to rotate around its axis. The upper valve stem 18 is fixedly connected to the valve ball 8, so the valve ball 8 will rotate synchronously with the upper valve stem 18. As the valve ball 8 rotates, when its internal channel gradually aligns with the inlet and outlet channels at both ends of the valve body 1, the corrosive gas can pass smoothly through the valve body 1, realizing the valve opening operation and allowing the gas to flow between the connecting pipes 22.
[0043] Conversely, when the valve is to be closed, the operator turns the handle 20 in the opposite direction. The handle 20 drives the upper valve stem 18 to rotate in the opposite direction, which in turn causes the valve ball 8 to rotate in the opposite direction. As the valve ball 8 rotates, when the solid part of the valve ball 8 moves between the inlet and outlet channels of the valve body 1, the channel will be completely blocked, preventing the flow of corrosive gas, thereby closing the valve and ensuring that gas cannot pass through the valve body 1.
[0044] For example, such as Figure 3 As shown, the present invention also includes a valve seat 21 that contacts and cooperates with the valve ball 8 in the inner cavity of the valve body 1.
[0045] When in use, when the valve is in the closed position, the valve ball 8 will fit tightly against the valve seat 21. Under the pressure of the corrosive gas, the valve ball 8 applies a certain pressure to the valve seat 21, so that the contact surface between the two can effectively prevent the gas from leaking out from the gap between the valve ball 8 and the inner cavity of the valve body 1, thereby ensuring the sealing of the valve when it is closed and preventing corrosive gas from leaking into the external environment or pipeline areas that should not pass through.
[0046] For example, such as Figure 3 As shown, the present invention also includes that the valve seat 21 is made of an elastic sealing material.
[0047] When in use, when the valve is closed, the valve ball 8 contacts the valve seat 21. Since the valve seat 21 is made of elastic sealing material, it can adapt to the shape and surface condition of the valve ball 8.
[0048] It should be noted that this utility model is a plastic ball valve for corrosion-resistant gases. The second flange 23 at one end of the connecting pipe 22 is aligned with the first flange 2 at both ends of the valve body 1. The first sleeve plate 3 and the second sleeve plate 4 are fitted onto the outer circumferential wall of the first flange 2 and the second flange 23. The sealing gasket 7 on its inner side wall ensures the sealing of the connection and prevents the leakage of corrosive gases. The two first connecting plates 5 on the first sleeve plate 3 are attached to the two corresponding second connecting plates 6 on the second sleeve plate 4 and connected by bolts, thereby achieving a tight connection between the connecting pipe 22 and the valve body 1.
[0049] The operator holds the handle 20 and applies a rotational torque. Since the handle 20 is fixedly connected to the upper valve stem 18, the rotation of the handle 20 drives the upper valve stem 18 to rotate around its axis. The upper valve stem 18 is fixedly connected to the valve ball 8. The valve ball 8 rotates synchronously with the upper valve stem 18. During the rotation of the valve ball 8, the pressure on the iron plate 15 and stainless steel plate 16, which were originally attached to the limiting ring 17, decreases. Under the elastic force of the spring 14, the slide rod 13 slides in the sleeve 12, and the iron plate 15 and stainless steel plate 16 move away from the limiting ring 17. The channel gradually opens. As the valve ball 8 continues to rotate, when its internal channel gradually aligns with the inlet and outlet channels at both ends of the valve body 1, the corrosive gas can pass smoothly through the valve body 1, realizing the valve opening operation and allowing the gas to flow between the connecting pipes 22.
[0050] The operator rotates handle 20 in the opposite direction, causing the upper valve stem 18 to rotate in the opposite direction, which in turn causes the valve ball 8 to rotate in the opposite direction. When the valve ball 8 rotates to the closed position, under the action of magnetic force, the valve ball 8 pulls the iron plate 15 and the stainless steel plate 16 closer to the limiting ring 17, overcoming the elastic force of the spring 14, so that the slide rod 13 slides in the sleeve 12 until the iron plate 15 is tightly attached to the limiting ring 17, and at the same time the valve ball 8 is tightly attached to the valve seat 21, closing the passage and preventing corrosive gas from passing through. The presence of the sealing gasket 7 also ensures the sealing of the connection part, preventing gas leakage from the connection part.
[0051] 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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A plastic ball valve for corrosion-resistant gases, comprising a valve body (1) and a connecting pipe (22), characterized in that, The valve body (1) is provided with a first flange (2) at both ends. There are two connecting pipes (22). The two connecting pipes (22) are provided with a second flange (23) for connecting to the first flange (2) at one end near the valve body (1). The outer circumferential walls of the first flange (2) and the second flange (23) are fitted with a first sleeve plate (3) and a second sleeve plate (4). The inner sidewalls of the first sleeve plate (3) and the second sleeve plate (4) are provided with sealing gaskets (7) that fit the first flange (2) and the second flange (23). The outer circumferential walls of the first sleeve plate (3) and the second sleeve plate (4) are respectively provided with two symmetrical first connecting plates (5) and second connecting plates (6). The two first connecting plates (5) are respectively fitted with the corresponding second connecting plates (6) and connected by bolts. A valve ball (8) is rotatably connected to the center of the inner cavity of the valve body (1). A magnet (9) is provided on the outside of the valve ball (8). Two symmetrical support blocks (10) are provided in the inner cavity of the valve body (1), and the support blocks (10) are located at both ends of the valve body (1). Multiple fixing rods (11) are fixedly connected to the outside of the two support blocks (10). The ends of the multiple fixing rods (11) away from the support blocks (10) are fixedly connected to the inner cavity wall of the valve body (1). A sleeve is fixedly connected to the ends of the two support blocks (10) away from the valve ball (8). (12) A sliding rod (13) is slidably connected to the sleeve (12). The other end of the sliding rod (13) is fixedly connected to the iron plate (15). A spring (14) is sleeved on the outer wall of the sleeve (12) and the sliding rod (13). Two limiting rings (17) are fixedly connected in the inner cavity of the valve body (1). A central ring hole is opened at the center of each of the two limiting rings (17). The diameter of the iron plate (15) is larger than the diameter of the central ring hole. A stainless steel plate (16) is provided at the end of the iron plate (15) away from the limiting ring (17).
2. The plastic ball valve for corrosion-resistant gases according to claim 1, characterized in that: The bottom end of the valve ball (8) is fixedly connected to the lower valve stem (19).
3. The plastic ball valve for corrosion-resistant gases according to claim 1, characterized in that: The valve ball (8) is fixedly connected to the top of the upper valve stem (18).
4. A plastic ball valve for corrosion-resistant gases according to claim 3, characterized in that: The top end of the upper valve stem (18) extends to the outside of the valve body (1) and is fixedly connected to the handle (20).
5. A plastic ball valve for corrosion-resistant gases according to claim 1, characterized in that: The valve body (1) has a valve seat (21) that contacts and cooperates with the valve ball (8) in the inner cavity.
6. A plastic ball valve for corrosion-resistant gases according to claim 5, characterized in that: The valve seat (21) is made of elastic sealing material.