A ball valve

Abstract

The application belongs to the field of valve devices, and specifically discloses a ball valve which comprises a valve body, valve seats and an opening and closing assembly; a water passing channel is formed in the valve body; the number of the valve seats is two, and the two valve seats are arranged in an axial direction of the water passing channel; a water passing hole which is in communication with the water passing channel is formed on the valve seat; the opening and closing assembly comprises a valve core and a driving rod, the valve core is rotatably installed between the two valve seats, one end of the driving rod is drivingly connected with the valve core, the other end of the driving rod extends to the outside of the valve body, and a valve core hole is formed on the valve core; the end of the valve seat close to the valve core is sealingly attached to the outer side wall of the valve core hole. Through the application, the problem of directional limitation of installation of the traditional ball valve caused by the single valve seat design is effectively solved, reliable sealing of the valve in any flow direction is realized, and the universality and working condition adaptability of the product are significantly improved.

Description

Technical Field

[0001] This application belongs to the field of valve devices, and more specifically, relates to a ball valve. Background Technology

[0002] A ball valve is a type of valve that achieves flow control through a right-angle rotary structure. It mainly consists of an actuator (electric or pneumatic) and a ball valve body. Its core components include the valve core, valve seat, seals, and drive unit. By changing the rotation angle of the valve core, the cross-sectional area of ​​the medium flow is adjusted to achieve precise flow control.

[0003] In existing ball valves, a valve seat is mounted at one end of the valve body. A spring is installed between the valve seat and the valve body, allowing the valve seat to move relative to the valve body so that it always rests against the valve core, forming a seal. However, during use, it has been found that water flow can push the valve seat away from the valve core, resulting in a gap between the valve seat and the valve core. This could lead to a loss of sealing in the ball valve. Utility Model Content

[0004] In view of the defects or improvement needs of the prior art, this application provides a ball valve, which aims to solve the technical problem that when the ball valve is in use, the water flow will push the valve seat away from the valve core, resulting in a gap between the valve seat and the valve core, and the ball valve may lose its sealing performance.

[0005] This application provides a ball valve, which includes a valve body, a valve seat, and an opening and closing assembly; A water passage is formed inside the valve body; The valve seat is two in number, and the two valve seats are spaced apart along the axial direction of the water passage. A water passage hole communicating with the water passage is formed on the valve seat. The opening and closing assembly includes a valve core and a drive rod. The valve core is rotatably mounted between the two valve seats. One end of the drive rod is driven and connected to the valve core, and the other end extends to the outside of the valve body. A valve core hole is formed on the valve core. The end of the valve seat near the valve core is sealed and fitted to the outer wall of the valve core hole.

[0006] As a further preferred embodiment, the inner wall of the water passage is formed with an installation groove, and at least part of the valve seat is installed in the installation groove.

[0007] As a further preferred embodiment, the valve body is provided with an elastic element connected to the valve seat, such that the valve seat tends to move toward the valve core.

[0008] As a further preferred embodiment, the outer wall of the valve seat is provided with a sealing ring that seals with the corresponding mounting groove, and the sealing ring and the water passage hole are coaxially arranged.

[0009] As a further preferred embodiment, the valve body includes a valve body and an end cap, the valve body having a structural hole, the end cap being at least partially inserted through the structural hole, and the end cap being detachably connected to the valve body.

[0010] As a further preferred embodiment, the mounting slot includes: A first mounting groove is formed on the inner wall of the structural hole, and one of the valve seats is disposed in the first mounting groove; The second mounting groove is formed on the inner wall of the end cover, and another valve seat is disposed in the second mounting groove.

[0011] As a further preferred embodiment, the first mounting groove has a first sidewall, the second mounting groove has a second sidewall, and the first sidewall is configured to face the second sidewall; wherein... The inner wall of the structural hole is provided with a first threaded portion, and the outer periphery of the end cap is provided with a second threaded portion. The first threaded portion and the second threaded portion cooperate to push the valve seat closer to the valve core when the end cap is installed.

[0012] As a further preferred embodiment, the bottom of the valve body is detachably mounted with a bottom pivot, the bottom pivot extending toward the valve core, and the bottom of the valve core being rotatably fitted onto the bottom pivot.

[0013] As a further preferred embodiment, the top of the valve body is provided with a drive rod hole, and the drive rod extends from the drive rod hole into the water passage and is connected to the valve core.

[0014] As a further preferred embodiment, a bracket is detachably mounted on the top of the valve body. The bracket has a bracket hole coaxially arranged with the drive rod hole. A limiting boss is formed on the inner wall of the bracket hole. A step that cooperates with the limiting boss is formed on the outer side of the drive rod. The upper end of the drive rod extends out of the bracket hole.

[0015] In summary, compared with the prior art, the technical solutions conceived in this application have the following main technical advantages: 1. The design of two valve seats achieves bidirectional sealing function. Specifically, the cooperation between the two valve seats and the valve core in the opening and closing assembly ensures that the sealing surface of the valve seat is always in close contact with the outer wall of the valve core ball, forming a stable sealing pair. This effectively solves the problem of the installation direction limitation of traditional ball valves, realizes reliable sealing of the valve in any flow direction, and significantly improves the versatility and adaptability of the product to working conditions.

[0016] 2. The mounting groove provides precise positioning and stable support for the valve seat, ensuring that the valve seat can be aligned with the valve core and withstand fluid pressure, thus guaranteeing the alignment and reliability of the sealing pair.

[0017] 3. The elastic element continuously provides initial preload, actively pushing the valve seat towards the valve core when the valve is closed or under low pressure, ensuring the establishment of an initial seal; when fluid pressure is applied, the spring force and fluid pressure work together to enhance the sealing effect and give the valve good pressure self-adaptation capability.

[0018] 4. The bracket enhances the support rigidity of the drive rod and the stability of the sealing part; the limiting boss cooperates with the step on the drive rod to effectively prevent the drive rod from coming off the valve body under fluid pressure, thus improving the safety and reliability of valve operation. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural diagram of a ball valve provided in an embodiment of this application; Figure 2 yes Figure 1 Enlarged view of region A in the middle; In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein: 10. Valve body; 10a. Water passage; 10b. First mounting groove; 10c. Second mounting groove; 10d. Drive rod hole; 11. Valve body; 11a. Structural hole; 12. End cap; 101. First side wall; 102. Second side wall; 111. First threaded part; 121. Second threaded part; 20. Valve seat; 20a. Water passage hole; 30. Opening and closing assembly; 31. Valve core; 31a. Valve core hole; 32. Drive rod; 32a. Step; 40. Elastic element; 50. Sealing ring; 60. Bottom pivot; 70. Bracket; 70a. Bracket hole; 70b. Limiting boss. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] In existing ball valves, a spring is installed between the valve seat and the valve body. The valve seat is movable relative to the valve body, allowing it to press against the valve core to form a seal. However, during use, it has been found that when the valve reverses due to installation errors, the water flow pushes the valve seat away from the valve core, resulting in a gap between the valve seat and the valve core. This could lead to a loss of sealing performance in the ball valve.

[0022] To solve this problem, such as Figure 1 As shown in the figure, this application discloses a ball valve, which includes a valve body 10, a valve seat 20, and an opening and closing assembly 30.

[0023] Specifically, a water passage 10a is formed inside the valve body 10.

[0024] Furthermore, there are two valve seats 20, and the two valve seats 20 are spaced apart along the axial direction of the water passage 10a. A water passage hole 20a communicating with the water passage 10a is formed on the valve seat 20.

[0025] The opening and closing assembly 30 includes a valve core 31 and a drive rod 32. The valve core 31 is rotatably mounted between two valve seats 20. One end of the drive rod 32 drives and connects to the valve core 31, and the other end extends to the outside of the valve body 10. A valve core hole 31a is formed on the valve core 31. The end of the valve seat 20 near the core 31 is sealed and fitted to the outer wall of the valve core hole 31a.

[0026] Thus, the design of two valve seats 20 achieves a bidirectional sealing function. Specifically, the cooperation between the two valve seats 20 and the valve core 31 in the opening and closing assembly 30 ensures that the sealing surface of the valve seat 20 is always in close contact with the outer wall of the spherical surface of the valve core 31, forming a stable sealing pair, which effectively solves the problem of installation direction restriction caused by the single valve design of traditional ball valves.

[0027] To optimize the installation and positioning of the valve seat 20, mounting grooves are formed at both ends of the water passage 10a, and at least a portion of the valve seat 20 is installed within the mounting grooves. The mounting grooves provide precise positioning and stable support for the valve seat 20, ensuring that the valve seat 20 can be aligned with the valve core 31 and withstand fluid pressure, thus guaranteeing the alignment and reliability of the sealing pair.

[0028] As a further optimization of this embodiment, combined with Figure 2 As shown, the valve body 10 is provided with an elastic element 40, which is connected to the valve seat 20 so that the 20 tends to move towards the valve core 31. The elastic element 40 continuously provides an initial preload, which actively pushes the valve seat 20 towards the valve core 31 in the valve closed state or low pressure state, ensuring the establishment of an initial seal. When fluid pressure is applied, the spring force and the fluid pressure work together to enhance the sealing effect and give the valve good pressure self-adaptation capability.

[0029] In some embodiments, the elastic element is a spring, optionally a pre-compression spring, and in other embodiments, the elastic element is an elastic pad or other elastic object.

[0030] In addition, the outer wall of the valve seat 20 is provided with a sealing ring 50 that seals with the corresponding mounting groove, and the sealing ring 50 and the water passage hole 20a are arranged coaxially.

[0031] The sealing ring 50 effectively prevents fluid leakage from the gap between the valve seat 20 and the mounting groove, achieving secondary sealing. Its coaxial arrangement with the water passage hole 20a ensures the uniformity of the seal and avoids unnecessary disturbance to the fluid caused by the sealing ring 50.

[0032] In terms of the structural design of the valve body 10, the valve body 10 specifically includes a valve body 11 and an end cap 12. The valve body 11 is provided with a structural hole 11a, and the end cap 12 is at least partially inserted through the structural hole. The end cap 12 is detachably connected to the valve body 11.

[0033] The split-type valve body 10 structure greatly facilitates the assembly, inspection and maintenance of internal valve components (such as valve core 31, valve seat 20, spring). Internal maintenance can be performed by simply removing the end cover 12, which reduces maintenance costs and time.

[0034] Specifically, in this embodiment, the mounting groove includes a first mounting groove 10b and a second mounting groove 10c, wherein the first mounting groove 10b is formed in the inner wall of the structural hole 11a, and one valve seat 20 is disposed in the first mounting groove 10b; the second mounting groove 10c is formed in the inner wall of the end cap 12, and the other valve seat 20 is disposed in the second mounting groove 10c.

[0035] Preferably, the first mounting groove 10b has a first sidewall 101, and the second mounting groove 10c has a second sidewall 102. The first sidewall 101 is configured to face the second sidewall 102. The inner wall of the structural hole 11a is provided with a first threaded portion 111, and the outer periphery of the end cover 12 is provided with a second threaded portion 121. The first threaded portion 111 and the second threaded portion 112 cooperate to push the valve seat 20 closer to the valve core 31 when the end cover 12 is installed.

[0036] When the end cap 12 is passed, it pushes the valve seat 20 closer to the valve core 31, ensuring that the valve seat 20 will not move away from the valve core 31 no matter which direction the water flows in, thus ensuring sealing stability.

[0037] To improve the rotational stability of the valve core 31, a bottom rotating shaft 60 is detachably mounted on the bottom of the valve body 10. The bottom rotating shaft 60 extends toward the valve core 31, and the bottom of the valve core 31 is rotatably fitted onto the bottom rotating shaft 60. The bottom rotating shaft 60 provides stable rotational support for the lower end of the valve core 31, and together with the top drive rod 32, forms a double support structure, which improves the rotational stability of the valve core 31.

[0038] The top of the valve body 10 is provided with a drive rod hole 10d. The drive rod 32 extends into the water passage 10a through the drive rod hole 10d and connects to the valve core 31. The drive rod hole 10d provides an installation and movement channel for the drive rod 32 and is a key interface connecting the external operating mechanism and the internal valve core 31.

[0039] Meanwhile, a bracket 70 is detachably mounted on the top of the valve body 10. The bracket 70 has a bracket hole 70a coaxially arranged with the drive rod hole 10d. A limiting boss 70b is formed on the inner wall of the bracket hole 70a. A step 32a that cooperates with the limiting boss 70b is formed on the outer side of the drive rod 32. The upper end of the drive rod 32 extends out of the bracket hole 70a.

[0040] The bracket 70 enhances the support rigidity of the drive rod 32 and the stability of the sealing part; the limiting boss 70b cooperates with the step 32a on the drive rod 32 to effectively prevent the drive rod 32 from coming off the valve body 10 under fluid pressure, thus improving the safety and reliability of valve operation.

[0041] In summary, the embodiments of this application achieve bidirectional sealing function through the design of two valve seats 20, effectively solving the problem of installation direction limitation caused by the single valve design of traditional ball valves, realizing reliable sealing of the valve in any flow direction, and significantly improving the versatility and adaptability of the product to working conditions.

[0042] In summary, the embodiments of this application achieve bidirectional sealing function through the design of two valve seats 20, effectively solving the problem of installation direction limitation caused by the single valve design of traditional ball valves, realizing reliable sealing of the valve in any flow direction, and significantly improving the versatility and adaptability of the product to working conditions.

[0043] It should be understood that expressions such as "comprising" and "may include" as used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "comprising" and / or "having" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but should not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0044] It should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0046] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A ball valve, characterized in that, It includes a valve body (10), a valve seat (20), and an opening and closing assembly (30); A water passage (10a) is formed inside the valve body (10); There are two valve seats (20), and the two valve seats (20) are spaced apart along the axial direction of the water passage (10a). A water passage hole (20a) communicating with the water passage (10a) is formed on the valve seat (20). The opening and closing assembly (30) includes a valve core (31) and a drive rod (32). The valve core (31) is rotatably mounted between two valve seats (20). One end of the drive rod (32) is driven to connect to the valve core (31), and the other end extends to the outside of the valve body (10). A valve core hole (31a) is formed on the valve core (31). The end of the valve seat (20) near the valve core (31) is sealed and fitted to the outer wall of the valve core (31).

2. The ball valve as described in claim 1, characterized in that, The inner wall of the water passage (10a) is formed with an installation groove, and at least part of the valve seat (20) is installed in the installation groove.

3. The ball valve according to claim 2, characterized in that, The valve body (10) is provided with an elastic element connected to the valve seat (20) so that the valve seat (20) tends to move toward the valve core (31).

4. The ball valve according to claim 2, characterized in that, The outer wall of the valve seat (20) is provided with a sealing ring (50) that seals with the corresponding mounting groove. The sealing ring (50) and the water passage hole (20a) are coaxially arranged.

5. The ball valve according to claim 2, characterized in that, The valve body (10) includes a valve body (11) and an end cap (12). The valve body (11) has a structural hole (11a). The end cap (12) is at least partially inserted through the structural hole (11a) and is detachably connected to the valve body (11).

6. The ball valve according to claim 5, characterized in that, The mounting slot includes: The first mounting groove (10b) is formed on the inner wall of the structural hole (11a), and one of the valve seats (20) is disposed in the first mounting groove (10b). The second mounting groove (10c) is opened on the inner wall of the end cover (12), and the other valve seat (20) is provided in the second mounting groove (10c).

7. The ball valve according to claim 6, characterized in that, The first mounting groove (10b) has a first sidewall (101), and the second mounting groove (10c) has a second sidewall (102), wherein the first sidewall (101) is configured to face the second sidewall (102); wherein, The inner wall of the structural hole (11a) is provided with a first threaded portion (111), and the outer periphery of the end cap (12) is provided with a second threaded portion (121). The first threaded portion (111) and the second threaded portion (112) cooperate to push the valve seat (20) closer to the valve core (31) when the end cap (12) is installed.

8. The ball valve according to claim 1, characterized in that, The bottom of the valve body (10) is detachably mounted with a bottom pivot (60), which extends toward the valve core (31), and the bottom of the valve core (31) is rotatably mounted on the bottom pivot (60).

9. The ball valve according to claim 1, characterized in that, The valve body (10) has a drive rod hole (10d) at the top, and the drive rod (32) extends from the drive rod hole (10d) into the water passage (10a) and is connected to the valve core (31).

10. The ball valve according to claim 9, characterized in that, A bracket (70) is detachably mounted on the top of the valve body (10). The bracket (70) has a bracket hole (70a) coaxially arranged with the drive rod hole (32a). A limiting boss (70b) is formed on the inner wall of the bracket hole (70a). A step (32a) that cooperates with the limiting boss (70b) is formed on the outer side of the drive rod (32). The upper end of the drive rod (32) extends out of the bracket hole (70a).

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