PPR pressure-bearing plastic copper core ball valve

Abstract

The invention relates to the technical field of fluid control components, in particular to a PPR pressure-bearing plastic copper core ball valve which is characterized by comprising a valve body, a ball body, a valve rod and a preassembly shell, a containing cavity is formed in the preassembly shell, the ball body is rotationally embedded in the containing cavity, and the valve rod is arranged in the valve body. The valve body wraps the outer surface of the pre-assembly shell to form an integral structure, the valve rod rotationally penetrates through the valve body and the pre-assembly shell, the valve rod penetrates into the containing cavity to be used for driving the ball to rotate, first sealing grooves are formed in the inner sides of the two ends of the pre-assembly shell, and the first sealing grooves are used for sealing the ball. First sealing rings making contact with shaft shoulders at the two ends of the ball body are embedded in the first sealing grooves. The sealing structure has the effects of being beneficial to improving the sealing performance and reducing the production cost.

Description

Technical Field

[0001] The present application relates to the technical field of fluid control components, and in particular to a PPR pressure-bearing plastic copper core ball valve. Background Art

[0002] As a key control component, ball valves play a vital role in fluid delivery systems in modern industrial production and everyday life. With the development of industry and improvements in people's living standards, the demands placed on fluid delivery systems are increasing. Numerous fields, including the petroleum, chemical, drainage, and gas industries, require precise control of fluid flow and delivery. Whether precisely regulating various fluids in industrial pipelines or ensuring the smooth flow of water in urban water supply systems, ball valves play an indispensable role. Their widespread use has greatly improved the efficiency and reliability of fluid delivery systems, providing strong support for development in various fields.

[0003] To address fluid control issues, traditional ball valves often utilize integrally cast metal or a combination of metal and rubber seals. Integrally cast metal ball valves utilize a precision casting process to create the valve body, leveraging the metal's high strength and rigidity to ensure structural stability. Combinations of metal and rubber seals, on the other hand, utilize rubber seals to enhance the sealing performance of a metal body. These ball valve structures are widely used in industrial production and daily life, meeting the basic requirements for fluid control in fluid delivery systems to a certain extent. Whether transporting diverse media in industrial pipelines or controlling water flow in urban water supply and drainage systems, these traditional ball valves play a vital role.

[0004] However, traditional ball valves made of metal are prone to corrosion and rust when exposed to corrosive fluids for a long time. This not only damages the valve body, affecting its proper operation, but also causes seal failure, leading to fluid leakage and shortening its service life. Some ball valves that use rubber seals are susceptible to aging, and their sealing performance degrades significantly under high temperatures, high pressures, or chemical media, similarly causing fluid leakage. Furthermore, the high energy consumption and cost of processing metal materials during the manufacturing process of traditional ball valves make them unsuitable for large-scale deployment. This issue urgently needs to be addressed. Summary of the Invention

[0005] In order to improve the sealing performance and reduce the production cost, the present application provides a PPR pressure-bearing plastic copper core ball valve.

[0006] This application provides a PPR pressure-bearing plastic copper core ball valve, which adopts the following technical solutions: A PPR pressure-bearing plastic copper core ball valve, comprising a valve body, a ball, a valve stem and a preassembled shell, wherein a receiving cavity is provided inside the preassembled shell, the ball is rotatably embedded in the receiving cavity, the valve body is covered on the outer surface of the preassembled shell to form an integral structure, the valve stem is rotatably penetrated through the valve body and the preassembled shell, and the valve stem penetrates into the receiving cavity to drive the ball to rotate, a first sealing groove is provided on the inner side of both ends of the preassembled shell, and a first sealing ring is embedded in the first sealing groove and contacts the shaft shoulders at both ends of the ball.

[0007] By adopting the above technical solution, the valve body is covered on the outer surface of the pre-assembled shell to form an integral structure, which makes the manufacture of the ball valve simpler and can effectively protect the internal components. The valve stem rotates and penetrates into the accommodating cavity to drive the ball to rotate to change the fluid flow rate. The first sealing ring is embedded in the first sealing groove and contacts the shaft shoulders at both ends of the ball, which can prevent the fluid from leaking from the connection between the ball and the pre-assembled shell, thereby helping to improve the sealing performance of the ball valve.

[0008] Preferably, a connecting groove is provided on the top of the sphere, and a connecting block for inserting into the connecting groove is provided at the end of the valve stem that penetrates into the accommodating cavity, and the connecting block and the connecting groove form a snap-fit ​​structure along the radial direction of the valve stem.

[0009] By adopting the above technical solution, the connecting block and the connecting groove form a clamping structure along the radial direction of the valve stem, so that the rotation of the valve stem drives the ball to rotate through the clamping of the connecting block and the connecting groove, thereby changing the flow rate of the fluid. The adjustment operation is simple and convenient, and the opening of the connecting groove reduces the weight of the ball and the production amount, making it lightweight and reducing production costs.

[0010] Preferably, a second sealing groove is provided around the surface of the valve stem in contact with the pre-assembled shell, a second sealing ring is provided in the second sealing groove, one side of the second sealing ring is pressed against the bottom of the second sealing groove, and the other side of the second sealing ring is pressed against the pre-assembled shell.

[0011] By adopting the above technical solution, one side of the second sealing ring is pressed against the bottom of the second sealing groove, and the other side of the second sealing ring is pressed against the pre-assembled shell, which can prevent the fluid from leaking from the connection between the valve stem and the pre-assembled shell, thereby helping to further improve the sealing performance of the ball valve.

[0012] Preferably, three groups of the second sealing grooves and the second sealing rings are provided, and the three groups of the second sealing grooves and the second sealing rings are spaced apart along the length direction of the valve stem.

[0013] By adopting the above technical solution, the three groups of second sealing grooves and the second sealing rings cooperate to perform a seepage-proof operation on the connection between the valve stem and the pre-assembled housing, which is beneficial to further improve the sealing performance of the ball valve.

[0014] Preferably, a third sealing groove is provided around the surface where the valve stem contacts the valve body, and a third sealing ring is provided in the third sealing groove. One side of the third sealing ring is pressed against the bottom of the third sealing groove, and the other side of the third sealing ring is pressed against the valve body.

[0015] By adopting the above technical solution, one side of the third sealing ring is pressed against the bottom of the third sealing groove, and the other side of the third sealing ring is pressed against the valve body, which can prevent the fluid from leaking from the connection between the valve stem and the valve body, thereby helping to further improve the sealing performance of the ball valve.

[0016] Preferably, a weight-reducing groove is provided at the bottom of the sphere.

[0017] By adopting the above technical solution, this setting can reduce the weight of the sphere and the production amount of the sphere, thereby achieving lightweightness while reducing production costs.

[0018] Preferably, a handle is fixedly provided on one end of the valve stem away from the sphere.

[0019] By adopting the above technical solution, the user can conveniently rotate the valve stem through the handle, thereby facilitating adjustment of the flow rate of the fluid and the opening and closing.

[0020] Preferably, the handle includes an integrally formed hand-held portion and a connecting portion, the connecting portion is sleeved on the end of the valve stem, a connecting bolt is provided on the connecting portion, and the connecting bolt is movable through the connecting portion and then threadedly penetrates the valve stem.

[0021] By adopting the above technical solution, the connecting bolt is movable through the connecting part and then threaded into the valve stem. The connecting bolt is tightened to fix the connecting part on the valve stem, and the user can conveniently rotate the valve stem by holding the part.

[0022] Preferably, a countersunk hole is provided at a position where the connecting bolt is movably passed through the connecting portion.

[0023] By adopting the above technical solution, when the connecting bolt is tightened, the head of the connecting bolt sinks into the countersunk hole to hide the connecting bolt, which is beneficial to improving the flatness and aesthetics of the handle.

[0024] Preferably, a metal skeleton is embedded in the valve body.

[0025] By adopting the above technical solution, the metal skeleton is embedded inside the valve body, which is beneficial to improving the structural stability of the valve body, and the fluid is difficult to contact the metal skeleton. Even corrosive fluids are difficult to corrode and rust the metal skeleton, thereby causing little damage to the valve body, which is beneficial to improving the service life of the ball valve.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By arranging the first sealing ring, the second sealing ring and the third sealing ring, the first sealing ring is embedded in the first sealing groove and contacts the shaft shoulders at both ends of the ball, thereby preventing the fluid from leaking out from the connection between the ball and the pre-assembled shell; one side of the second sealing ring is pressed against the bottom of the second sealing groove, and the other side opposite to the second sealing ring is pressed against the pre-assembled shell, thereby preventing the fluid from leaking out from the connection between the valve stem and the pre-assembled shell; one side of the third sealing ring is pressed against the bottom of the third sealing groove, and the other side opposite to the third sealing ring is pressed against the valve body, thereby preventing the fluid from leaking out from the connection between the valve stem and the valve body; the cooperation of the first sealing ring, the second sealing ring and the third sealing ring greatly improves the sealing performance of the ball valve.

[0027] 2. By opening a connecting groove at the top of the sphere and a weight-reducing groove at the bottom of the sphere, the connecting groove cooperates with the connecting block to drive the sphere to rotate. The opening of the connecting groove and the weight-reducing groove reduces the weight of the sphere and the production amount of the sphere, thereby achieving lightweightness while reducing production costs.

[0028] 3. By embedding a metal skeleton inside the valve body, the metal skeleton embedded inside the valve body is beneficial to improving the structural stability of the valve body, and the fluid is difficult to contact the metal skeleton. Even corrosive fluids are difficult to corrode and rust the metal skeleton, thereby causing little damage to the valve body, which is beneficial to increasing the service life of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the PPR pressure-bearing plastic copper core ball valve in the embodiment of the present application.

[0030] Figure 2 It is a vertical cross-sectional view of the PPR pressure-bearing plastic copper core ball valve in an embodiment of the present application.

[0031] Figure 3 It is an exploded view of the PPR pressure-bearing plastic copper core ball valve in the embodiment of the present application.

[0032] Figure 4 yes Figure 3 Enlarged view of part A in the middle.

[0033] Description of reference numerals: 1. Valve body; 2. Ball; 3. Valve stem; 4. Pre-assembled housing; 5. Accommodating chamber; 6. First sealing groove; 7. First sealing ring; 8. Connecting groove; 9. Connecting block; 10. Second sealing groove; 11. Second sealing ring; 12. Third sealing groove; 13. Third sealing ring; 14. Weight reduction groove; 15. Handle; 151. Hand-held part; 152. Connecting part; 16. Countersunk hole. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-4 This application is described in further detail.

[0035] The present application embodiment discloses a PPR pressure-bearing plastic copper core ball valve, referring to Figure 1 and Figure 2 The ball valve comprises a valve body 1, a ball 2, a valve stem 3, and a preassembled housing 4. The preassembled housing 4 has an interior containing a chamber 5, within which the ball 2 is rotatably embedded. The valve body 1 is coated onto the outer surface of the preassembled housing 4 through an injection molding process to form an integral structure. This structure simplifies the manufacture of the ball valve and effectively protects the internal components. The valve stem 3 is rotatably inserted through the valve body 1 and the preassembled housing 4, and the valve stem 3 penetrates the chamber 5 to drive the ball 2 to rotate. First sealing grooves 6 are provided on the inner sides of both ends of the preassembled housing 4. First sealing rings 7 are embedded in the first sealing grooves 6 to contact the shaft shoulders at both ends of the ball 2, thereby preventing fluid from leaking from the connection between the ball 2 and the preassembled housing 4, thereby improving the sealing performance of the ball valve. In this embodiment, the first sealing ring 7 is made of a plastic with good elasticity and corrosion resistance, such as polytetrafluoroethylene. The shape of the first sealing ring 7 is compatible with the first sealing groove 6 and can be tightly embedded in the first sealing groove 6.

[0036] Reference Figure 2 and Figure 3 The pre-assembled housing 4 is arranged in a horizontal cylindrical shape, providing space for the installation and rotation of the sphere 2. The shape of the accommodating cavity 5 is adapted to the shape of the sphere 2 to ensure that the sphere 2 can rotate flexibly within the accommodating cavity 5. The pre-assembled housing 4 is made of a high-strength plastic material. In this embodiment, the pre-assembled housing 4 is made of polycarbonate, which has excellent corrosion resistance and mechanical properties.

[0037] Reference Figure 3 and Figure 4, the sphere 2 is made of copper alloy, which has high strength and good corrosion resistance, and can ensure that the sphere 2 does not deform under high pressure, ensuring flexible rotation and reliable sealing. At the same time, a hollow channel is provided in the sphere 2, and the hollow channel is used for fluid transportation. It should be noted that the shape of the sphere 2 is set as a prototype, and its surface is precisely machined to ensure good contact with the first sealing ring 7. At the same time, a connecting groove 8 is provided on the top of the sphere 2, and a connecting block 9 for inserting the connecting groove 8 is provided at the end of the valve stem 3 that penetrates the accommodating cavity 5, and the connecting block 9 and the connecting groove 8 form a snap-fit ​​structure along the radial direction of the valve stem 3. When the valve stem 3 rotates, the valve stem 3 drives the sphere 2 to rotate through the snap-fit ​​cooperation between the connecting block 9 and the connecting groove 8. In this embodiment, the valve stem 3 is made of stainless steel metal material. Refer to Figure 2 A weight-reducing groove 14 is provided at the bottom of the sphere 2 to reduce the weight of the sphere 2 and the production amount of the sphere 2, thereby achieving lightweighting and reducing production costs.

[0038] Reference Figure 1 and Figure 2 A handle 15 is fixedly provided at one end of the valve stem 3 away from the sphere 2, so that the user can rotate the valve stem 3 through the handle 15. Specifically, the handle 15 includes an integrally formed hand-held portion 151 and a connecting portion 152. The connecting portion 152 is sleeved on the upper end of the valve stem 3. At the same time, a connecting bolt is provided on the connecting portion 152. The connecting bolt is movable through the connecting portion 152 along the length direction of the valve stem 3 and then threaded into the valve stem 3. The connecting bolt is tightened to fix the connecting portion 152 to the valve stem 3. At this time, the user can easily rotate the valve stem 3 by turning the hand-held portion 151. It is worth mentioning that a countersunk hole 16 is provided at the position where the connecting bolt is movably passed through the connecting portion 152. When the connecting bolt is tightened, the head of the connecting bolt sinks into the countersunk hole 16 to hide the connecting bolt, which is conducive to improving the flatness and aesthetics of the handle 15.

[0039] Reference Figure 2 and Figure 4 A second sealing groove 10 is formed around the contact surface of the valve stem 3 with the preassembled housing 4. A second sealing ring 11 is disposed within the second sealing groove 10. One side of the second sealing ring 11 abuts against the bottom of the second sealing groove 10, while the other side of the second sealing ring 11 abuts against the preassembled housing 4. This prevents fluid from leaking from the connection between the valve stem 3 and the preassembled housing 4, thereby improving the sealing performance of the ball valve. In this embodiment, three groups of second sealing grooves 10 and second sealing rings 11 are provided, spaced apart along the length of the valve stem 3 to further improve sealing performance.

[0040] Reference Figure 2 and Figure 4A third sealing groove 12 is provided around the surface where the valve stem 3 contacts the valve body 1. A third sealing ring 13 is provided in the third sealing groove 12. One side of the third sealing ring 13 is pressed against the bottom of the third sealing groove 12, and the other side of the third sealing ring 13 is pressed against the valve body 1 to prevent the fluid from leaking from the connection between the valve stem 3 and the valve body 1, thereby further improving the sealing performance of the ball valve.

[0041] Reference Figure 1 and Figure 2 The valve body 1 is covered on the outside of the pre-assembled shell 4 by an injection molding process to form an integral structure. This one-piece injection molding process simplifies the manufacturing process and is conducive to controlling production costs. The valve body 1 is made of PPR (random copolymer polypropylene) plastic. PPR plastic has good corrosion resistance, heat resistance and mechanical properties, and can adapt to a variety of complex working conditions. It is worth mentioning that a metal skeleton is embedded in the valve body 1. In this embodiment, the metal skeleton is arranged in a ring shape, and the cross-section of the metal skeleton is I-shaped and extends axially along the valve body 1 to the flanges at both ends. The metal skeleton can enhance the strength and rigidity of the valve body 1 and prevent the valve body 1 from deforming under high pressure. The metal skeleton is made of metal materials such as carbon steel, and its I-shaped cross-section design can effectively disperse stress, which is conducive to improving the load-bearing capacity.

[0042] The implementation principle of a PPR pressure-bearing plastic copper-core ball valve in the embodiment of the present application is as follows: the PPR pressure-bearing plastic copper-core ball valve effectively solves the problems existing in traditional ball valves through its unique structural design. The combination of a PPR plastic valve body 1 and a copper alloy ball 2 reduces costs and improves the corrosion resistance and service life of the ball valve. The multi-layer sealing structure and special fluid channel design significantly improve the sealing performance and fluid delivery performance of the ball valve. At the same time, the application of injection molding technology and a metal skeleton simplifies the manufacturing process and enhances the overall strength and stability of the ball valve. These improvements enable the ball valve to adapt to a variety of complex working conditions and have a wider application prospect.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A PPR pressure-bearing plastic copper core ball valve, characterized by: The invention comprises a valve body (1), a ball (2), a valve stem (3) and a pre-assembled shell (4); a receiving chamber (5) is provided inside the pre-assembled shell (4); the ball (2) is rotatably embedded in the receiving chamber (5); the valve body (1) is covered on the outer surface of the pre-assembled shell (4) to form an integral structure; the valve stem (3) is rotatably penetrated through the valve body (1) and the pre-assembled shell (4); and the valve stem (3) penetrates into the receiving chamber (5) to drive the ball (2) to rotate; first sealing grooves (6) are provided on the inner sides of both ends of the pre-assembled shell (4); and first sealing rings (7) are embedded in the first sealing grooves (6) and are in contact with the shaft shoulders at both ends of the ball (2).

2. A PPR pressure-bearing plastic copper core ball valve according to claim 1, characterized in that: A connecting groove (8) is provided on the top of the sphere (2), and a connecting block (9) for inserting into the connecting groove (8) is provided at the end of the valve stem (3) that penetrates into the accommodating cavity (5), and the connecting block (9) and the connecting groove (8) form a snap-fit ​​structure along the radial direction of the valve stem (3).

3. A PPR pressure-bearing plastic copper core ball valve according to claim 1, characterized in that: A second sealing groove (10) is provided around the surface of the valve stem (3) in contact with the pre-assembled housing (4), a second sealing ring (11) is provided in the second sealing groove (10), one side of the second sealing ring (11) is pressed against the bottom of the second sealing groove (10), and the other side of the second sealing ring (11) is pressed against the pre-assembled housing (4).

4. A PPR pressure-bearing plastic copper core ball valve according to claim 3, characterized in that: The second sealing groove (10) and the second sealing ring (11) are provided in three groups, and the three groups of the second sealing groove (10) and the second sealing ring (11) are arranged at intervals along the length direction of the valve stem (3).

5. A PPR pressure-bearing plastic copper core ball valve according to claim 1, characterized in that: A third sealing groove (12) is provided around the surface of the valve stem (3) in contact with the valve body (1), and a third sealing ring (13) is provided in the third sealing groove (12). One side of the third sealing ring (13) is pressed against the bottom of the third sealing groove (12), and the other side of the third sealing ring (13) is pressed against the valve body (1).

6. A PPR pressure-bearing plastic copper core ball valve according to claim 1, characterized in that: A weight-reducing groove (14) is provided at the bottom of the sphere (2).

7. A PPR pressure-bearing plastic copper core ball valve according to claim 1, characterized in that: A handle (15) is fixedly provided on one end of the valve stem (3) facing away from the sphere (2).

8. A PPR pressure-bearing plastic copper core ball valve according to claim 7, characterized in that: The handle (15) comprises an integrally formed hand-held portion (151) and a connecting portion (152), wherein the connecting portion (152) is sleeved on the end of the valve stem (3), and a connecting bolt is provided on the connecting portion (152), and the connecting bolt is movable through the connecting portion (152) and then threadedly threaded into the valve stem (3).

9. A PPR pressure-bearing plastic copper core ball valve according to claim 8, characterized in that: A countersunk hole (16) is provided at a position where the connecting bolt is movably passed through the connecting portion (152).

10. The PPR pressure-bearing plastic copper core ball valve according to claim 1, characterized in that: A metal skeleton is embedded in the valve body (1).

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