Ultralow temperature ball valve

Abstract

The utility model discloses a valve technical field's ultralow temperature ball valve, including valve body, outlet valve seat, inlet valve seat and packing assembly, the top of valve body is provided with actuator, the top of valve body is provided with actuator, the inside of valve body is provided with the ball, and the both sides of ball are provided with outlet valve seat and inlet valve seat respectively. The upper-mounted structure is convenient for subsequent maintenance and overhaul, does not need to dismantle the valve from the pipeline, only needs to dismantle the middle flange bolt and nut, can carry out maintenance and overhaul on the pipeline, can greatly shorten the repair time, the valve seat and the restraint ring are connected together through the cylindrical pin, when rotating the valve seat locknut and making the valve seat axial movement, will not appear the phenomenon of following rotation, the relative matching position of valve seat and valve body, ball remains unchanged, avoids the matching error during the relative rotation of valve seat and valve body, causes the leakage.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to an ultra-low temperature ball valve. Background Technology

[0002] A ball valve is a valve in which the valve stem drives the opening and closing element (ball) to rotate around the valve's axis. It can also be used for fluid regulation and control. Hard-seal V-type ball valves, with their V-shaped ball core and hard alloy-faced metal seat, possess strong shearing force, making them particularly suitable for media containing fibers or small solid particles. Multi-port ball valves not only allow for flexible control of media merging, splitting, and flow direction switching in pipelines, but also allow the closure of any channel while connecting two other channels. These types of valves should generally be installed horizontally in pipelines.

[0003] In the existing technology, side-mounted valves are not conducive to subsequent maintenance and repair. They need to be removed from the pipeline, which is very cumbersome and time-consuming, affecting the normal production schedule. Graphite seals are prone to wear and have a short service life. The valve stem is in direct contact with the valve cover and ball, resulting in a large torque and easy wear. Utility Model Content

[0004] The purpose of this invention is to provide an ultra-low temperature ball valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cryogenic ball valve, comprising a valve body, an outlet valve seat, an inlet valve seat, and a packing assembly. An actuator is disposed on the top of the valve body. A ball is disposed inside the valve body, with an outlet valve seat and an inlet valve seat disposed on both sides of the ball. The ball is supported within the valve body by a support base and a first and a second planar bearing, allowing the ball to rotate to open and close the fluid flow. A valve stem is disposed above the ball, passing through a valve cover and connecting to the actuator. A packing assembly is disposed between the valve stem and the valve cover to prevent fluid leakage. The packing assembly includes braided packing and multiple packing spacers, with the braided packing compressed between the packing spacers to provide a sealing effect.

[0006] As a further embodiment of this invention: an anti-static device is provided below the sphere, and the anti-static device is in contact with the sphere.

[0007] As a further improvement of this utility model, the valve body is further provided with a first sliding bearing, a second sliding bearing and a third sliding bearing, and the ball is supported by the first sliding bearing, the second sliding bearing and the third sliding bearing to reduce friction and wear when the ball rotates.

[0008] As a further improvement of this utility model: an outlet positioning ring and an inlet positioning ring are respectively provided on the outlet valve seat and the inlet valve seat. The outlet positioning ring and the inlet positioning ring are used to fix and position the valve seat to ensure the sealing effect between the valve seat and the ball.

[0009] As a further improvement of this utility model: a bracket is provided between the valve body and the actuator. The bracket is used to support and fix the actuator, ensuring that the actuator can stably drive the valve stem and ball to rotate.

[0010] As a further improvement of this utility model: a pressure sleeve and a pressure plate are respectively provided above and below the packing assembly, and the pressure sleeve and pressure plate are fastened by studs and nuts to compress the packing assembly between the valve stem and the valve cover, providing a reliable sealing effect.

[0011] As a further improvement of this utility model, a first lip seal, a second lip seal, and a third lip seal are respectively provided on the surface of the ball and the sealing surfaces of the outlet valve seat and the inlet valve seat, so as to further improve the sealing effect and prevent fluid leakage.

[0012] As a further improvement of this invention, a water droplet plate is also included. The water droplet plate is located below the actuator and is used to collect and drain the condensate generated when the actuator is working, so as to prevent the condensate from damaging the ball valve.

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

[0014] 1. The top-mounted structure facilitates subsequent maintenance and repair. It eliminates the need to remove the valves from the pipeline. Only the middle flange bolts and nuts need to be removed to perform maintenance and repair on the pipeline, which can greatly shorten the maintenance time.

[0015] 2. The valve seat and the restraining ring are connected together by a cylindrical pin. When the valve seat is rotated and the valve seat locking nut (34) is rotated to move the valve seat axially, there will be no phenomenon of rotation. The relative fit position of the valve seat, valve body and ball remains unchanged, avoiding the fit error caused by the relative rotation of the valve seat and valve body, which will cause leakage.

[0016] 3. The valve seat and valve body are sealed with a lip seal, which greatly improves the sealing performance and reliability of the valve, while reducing the friction of the seal, reducing wear, and increasing the service life of the seal.

[0017] 4. A lip seal ring is added to the bottom of the packing assembly, which greatly reduces the possibility of media leakage from the packing and improves the safety and reliability of the valve.

[0018] 5. Adding bearings and hardening treatment at the metal contact points between the support base, ball, valve cover, and valve stem effectively prevents valve seizure caused by friction and improves valve service life. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of an ultra-low temperature ball valve according to the present invention;

[0020] Figure 2 This is a cross-sectional structural diagram of an ultra-low temperature ball valve according to the present invention;

[0021] Figure 3 This is an enlarged cross-sectional view of the inlet valve seat in a cryogenic ball valve according to the present invention.

[0022] Figure 4 This is an enlarged cross-sectional view of the outlet valve seat in a cryogenic ball valve according to the present invention.

[0023] Figure 5 This is an enlarged cross-sectional view of the packing structure in an ultra-low temperature ball valve according to this utility model.

[0024] In the diagram: 1. Valve body; 2. Outlet valve seat; 3. First plane bearing; 4. Support seat; 5. Second plane bearing; 6. Ball; 7. First sliding bearing; 8. Inlet valve seat; 9. Anti-static device; 10. Valve cover; 11. Valve stem; 12. Water drop plate; 13. Third plane bearing; 14. Pressure sleeve; 15. Pressure plate; 16. Disc spring; 17. Disc spring sleeve; 18. Stud; 19. Nut; 20. Bracket; 21. Actuator; 22. Packing assembly; 23. Second sliding bearing; 24. Third sliding bearing; 25. 26. Fourth plane bearing; 27. Inlet limiting ring; 28. First cylindrical pin; 29. ​​Restriction ring; 20. Second cylindrical pin; 31. First lip seal; 32. Inlet positioning ring; 33. Split ring; 34. Leaf spring; 35. Valve seat lock nut; 36. Sealing ring; 37. Outlet positioning ring; 38. Second lip seal; 39. Outlet limiting ring; 40. Packing spacer ring; 41. First O-ring; 42. Second O-ring; 43. Packing; 44. Braided packing; 45. Packing gasket; 46. Third lip seal. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0027] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "configuration" should be interpreted broadly. For example, they can refer to a fixed connection or configuration, a detachable connection or configuration, or an integral connection or configuration. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Please see Figures 1-5 In this embodiment of the utility model, a cryogenic ball valve, the main components and structural details of which are described below:

[0030] Valve body 1: As the main structure of the ball valve, valve body 1 has an internal cavity to accommodate the ball 6 and other internal components. The top of valve body 1 is designed with an interface for connecting to actuator 21, and valve cover 10 is also installed on the top of valve body 1. Both ends of valve body 1 are welded beveled structures.

[0031] Outlet valve seat 2 and inlet valve seat 8: These two valve seats are respectively located on both sides of the ball 6, and are used to cooperate with the sealing surface of the ball 6 when the ball 6 rotates to realize the opening and closing of the fluid. The outlet valve seat 2 and the inlet valve seat 8 are respectively equipped with an outlet positioning ring 36 and an inlet positioning ring 31. These positioning rings are used to fix and position the valve seats to ensure the sealing effect between the valve seats and the ball 6.

[0032] Ball 6: As an opening and closing element, ball 6 is designed inside the cavity of valve body 1, and fluid control is achieved by rotation. The bottom of ball 6 is equipped with a support base 4, a first planar bearing 3, and a second planar bearing 5. These components together support the rotation of ball 6 within valve body 1. Furthermore, a first lip seal ring 30 is fitted to the surface of ball 6 to improve the sealing effect.

[0033] Actuator 21: Actuator 21 is mounted on top of valve body 1 and connected to ball 6 via valve stem 11, used to drive ball 6 to rotate. A bracket 20 is also installed between valve body 1 and actuator 21 to support and fix actuator 21, ensuring that actuator 21 can work stably.

[0034] Valve stem 11: Valve stem 11 passes through valve cover 10 and is connected to actuator 21, used to transmit the driving force of actuator 21 to ball 6. A packing assembly 22 is installed between valve stem 11 and valve cover 10 to prevent fluid leakage.

[0035] Packing assembly 22: Packing assembly 22 includes braided packing 43 and multiple packing spacers 39. The braided packing 43 is compressed between the packing spacers 39 to provide a reliable sealing effect. A pressure sleeve 14 and a pressure plate 15 are also mounted above and below the packing assembly 22, respectively. These components are fastened by studs 18 and nuts 19 to ensure that the packing assembly 22 is tightly pressed between the valve stem 11 and the valve cover 10.

[0036] Antistatic device 9: In order to prevent the ball 6 from generating static electricity during rotation, an antistatic device 9 is installed below the ball 6. This device is in direct contact with the ball 6 to ensure that static electricity can be discharged in time.

[0037] Sliding bearings: The valve body 1 is also equipped with a first sliding bearing 7, a second sliding bearing 23 and a third sliding bearing 24. These bearings work together to support the ball 6 and reduce friction and wear during rotation.

[0038] Lip seals: In addition to the first lip seal 30 mounted on the surface of the ball 6, the sealing surfaces of the outlet valve seat 2 and the inlet valve seat 8 are also equipped with a second lip seal 37 and a third lip seal 45, respectively. These lip seals further improve the sealing performance and reliability of the ball valve.

[0039] Water drop plate 12: In order to prevent the condensate generated by the actuator 21 during operation from damaging the ball valve, the water drop plate 12 is set below the actuator 21 to collect and drain the condensate.

[0040] The assembly also includes a third planar bearing 13, which is located in the middle of the packing assembly 22; a fourth planar bearing 25, which is located at the bottom of the third sliding bearing 24; two disc springs 16 and two disc spring sleeves 17, with the disc springs 16 snapped into the disc spring sleeves 17 and the disc spring sleeves 17 fixed to both ends of the pressure plate 15; an inlet positioning ring 31 is also snapped into an inlet limiting ring 26, with a first cylindrical pin 27 vertically inserted into one end of the inlet positioning ring 31 away from the inlet limiting ring 26 and a second cylindrical pin 29 horizontally inserted into it, and a restraining ring 28 is also fixed through it.

[0041] A split ring 32 is fixed to the top of one end of the inlet positioning ring 31. A leaf spring 33 is fixedly connected to the end of the inlet positioning ring 31 near the split ring 32. A valve seat locking nut 34 is fixed to the end of the inlet positioning ring 31 near the leaf spring 33. A sealing ring 35 is fixedly connected to the end of the inlet positioning ring 31 near the valve seat locking nut 34. An outlet limiting ring 38 is fixedly connected to one end of the outlet positioning ring 36.

[0042] A first O-ring 40 and a second O-ring 41 are fixedly connected to one side of the packing spacer ring 39. The first O-ring 40 and the second O-ring 41 are arranged opposite to each other. The packing spacer ring 39 is filled with packing 42, and a packing pad 44 is fixed to the bottom end of the packing spacer ring 39.

[0043] Working principle: When the actuator 21 receives an open signal, it rotates the ball 6 via the valve stem 11. The rotation of the ball 6 causes its sealing surface to gradually separate from the sealing surface of the outlet valve seat 2 or the inlet valve seat 8, thereby allowing fluid to pass through the valve. Conversely, when the actuator 21 receives a close signal, the ball 6 rotates in the opposite direction until its sealing surface is tightly fitted with the sealing surfaces of the outlet valve seat 2 and the inlet valve seat 8, thereby preventing fluid from passing through.

[0044] The surface of the ball 6 and the sealing surfaces of the outlet valve seat 2 and the inlet valve seat 8 are respectively provided with lip seals (first lip seal 30, third lip seal 45). These lip seals fill the tiny gaps between the sealing surfaces through elastic deformation, thereby improving the sealing effect.

[0045] The packing assembly 22 plays a crucial sealing role. Located on the valve stem 11 cover 10, it provides a reliable seal by using 43 braided packing rings 39 to prevent fluid leakage from the valve stem 11.

[0046] The valve body 1 is equipped with sliding bearings (first sliding bearing 7, second sliding bearing 23, and third sliding bearing 24). These bearings can support the ball 6 and reduce friction and wear during rotation.

[0047] The use of sliding bearings not only improves the durability of ball valves, but also reduces the torque requirements during operation.

[0048] An anti-static device 9 is installed below the ball 6, and this device is in direct contact with the ball 6. During the rotation of the ball 6, the anti-static device 9 can promptly discharge any static electricity that may be generated, thereby preventing static electricity from damaging the ball valve or surrounding equipment.

[0049] The cryogenic ball valve adopts a top-mounted structure, which facilitates subsequent maintenance and repair. When maintenance is required, only the middle flange bolts and nuts 19 need to be removed to perform maintenance and repair on the pipeline, greatly shortening the maintenance time.

[0050] A drip plate 12 is provided on the actuator 21 to collect and drain the condensate generated during the operation of the actuator 21. This prevents the condensate from damaging the ball valve and ensures the normal operation of the ball valve.

[0051] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0052] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A cryogenic ball valve, comprising a valve body (1), an outlet valve seat (2), an inlet valve seat (8), and a packing assembly (22), characterized in that: An actuator (21) is provided on the top of the valve body (1). A valve cover (10) is provided at the top of the valve body (1). A ball (6) is provided inside the valve body (1). An outlet valve seat (2) and an inlet valve seat (8) are provided on both sides of the ball (6). A support seat (4), a first plane bearing (3), and a second plane bearing (5) are provided at the bottom of the ball (6). The ball (6) is supported by the support seat (4). 4) and the first plane bearing (3) and the second plane bearing (5) are supported in the valve body (1). A valve stem (11) is provided above the ball (6). The valve stem (11) passes through the valve cover (10) and is connected to the actuator (21). A packing assembly (22) is provided between the valve stem (11) and the valve cover (10). The packing assembly (22) includes braided packing (43) and a plurality of packing spacers (39). The braided packing (43) is compressed in the packing spacers (39).

2. The cryogenic ball valve according to claim 1, characterized in that: An antistatic device (9) is provided below the sphere (6), and the antistatic device (9) is in contact with the sphere (6).

3. The cryogenic ball valve according to claim 1, characterized in that: The valve body (1) is also provided with a first sliding bearing (7), a second sliding bearing (23) and a third sliding bearing (24), and the ball (6) is supported by the first sliding bearing (7), the second sliding bearing (23) and the third sliding bearing (24).

4. The cryogenic ball valve according to claim 1, characterized in that: The outlet valve seat (2) and the inlet valve seat (8) are respectively provided with an outlet positioning ring (36) and an inlet positioning ring (31), which are used to fix and position the valve seats.

5. A cryogenic ball valve according to claim 1, characterized in that: A bracket (20) is provided between the valve body (1) and the actuator (21). The bracket (20) is used to support and fix the actuator (21) to ensure that the actuator (21) can stably drive the valve stem (11) and the ball (6) to rotate.

6. A cryogenic ball valve according to claim 1, characterized in that: A pressure sleeve (14) and a pressure plate (15) are respectively provided above and below the packing assembly (22), and the pressure sleeve (14) and the pressure plate (15) are fastened by studs (18) and nuts (19).

7. A cryogenic ball valve according to claim 1, characterized in that: The surface of the ball (6) and the sealing surfaces of the outlet valve seat (2) and the inlet valve seat (8) are respectively provided with a first lip seal (30), a second lip seal (37) and a third lip seal (45) to further improve the sealing effect and prevent fluid leakage.

8. A cryogenic ball valve according to any one of claims 1 to 7, characterized in that: It also includes a water drop plate (12) disposed below the actuator (21).

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