High-pressure soft sealing manual fixing ball valve

Abstract

The utility model discloses a high-pressure soft sealing manual fixed ball valve which comprises a valve body, a thrust pad, a bearing seat, a bearing, a valve rod and a ball body are arranged in the valve body, a lower end cover is arranged below the valve body, and the upper end of the valve body and the lower end of the valve body are respectively provided with an O-shaped ring and a check ring. The valve seat assembly is composed of a fixing device, a sealing ring, a disc spring, a thrust ring, an O-shaped ring and a check ring, end covers are installed on the two sides of the valve body, the valve rod is sleeved with a handle seat, the handle seat and the valve rod are connected into a whole through a screw, the handle seat is connected with a handle through an inner hexagon screw, and a split check ring is arranged in the valve body. The ball body and supporting shaft integrated structure design is adopted, and the device has the advantages of being compact in structure, good in sealing performance, light in weight, small in driving torque, easy and convenient to operate, easy to achieve rapid opening and closing, convenient to maintain and the like, and is suitable for media under the high-pressure gas working condition.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and in particular to a high-pressure soft-seal manually fixed ball valve. Background Technology

[0002] In the field of hydrogen energy applications, ball valves are widely used in equipment and pipelines of 35MPa and 70MPa hydrogen refueling stations, such as hydrogen booster stations, high-flow mobile hydrogen booster systems, and high-pressure pipelines. They are primarily used as manual shut-off valves, handling high-pressure gases such as hydrogen as the main medium. The operating temperature range is -40℃ to +85℃, and the pressure rating can reach 20000PSI (138MPa). The main body is made of strain-strengthened 316 / 316 stainless steel to avoid the potential hazards of hydrogen embrittlement caused by high-pressure hydrogen. The connecting pipe size is between 1 / 4″ and 1″, with a compact overall structure and a fixed ball soft seal structure, ensuring reliable sealing performance.

[0003] Traditional fixed ball valves use a ball with two supporting shafts as the opening and closing element, with a channel in the middle equal to the pipe diameter. The ball rotates 90° around the valve stem axis to open and close the passage. This design is not compact, has poor sealing, is heavy, has a large driving torque, is cumbersome to operate, and is not easy to achieve quick opening and closing or convenient maintenance. To address these issues, we propose a soft-seal manual fixed ball valve for high pressure applications. Utility Model Content

[0004] The purpose of this invention is to provide a high-pressure soft-seal manually fixed 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:

[0006] A high-pressure soft-seal manually fixed ball valve includes a valve body. The valve body internally houses a thrust pad, a bearing seat, a bearing, a valve stem, and a ball. A lower end cap is located at the bottom of the valve body. O-rings and retaining rings are provided at both the upper and lower ends of the valve body. The valve seat assembly consists of a retainer, a sealing ring, a disc spring, a thrust ring, an O-ring, and a retaining ring. End caps are installed on both sides of the valve body. A handle seat is fitted onto the valve stem and connected as a single unit with screws. A handle is connected to the handle seat via hexagonal socket screws. An open retaining ring is provided inside the valve body.

[0007] In a further embodiment, the lower end cap is fastened to the valve body by threads.

[0008] In a further embodiment, the sealing ring material is PEEK.

[0009] In a further embodiment, a pin is provided between the valve body and the handle seat.

[0010] In a further embodiment, the valve body and the end cap are sealed by an O-ring.

[0011] In a further embodiment, a set of fixing nuts is provided on the outside of the valve body.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This device adopts an integrated structure design of sphere and support shaft, which features compact structure, good sealing performance, light weight, small driving torque, simple operation, easy to achieve rapid start and stop and convenient maintenance. It is suitable for high-pressure gas media.

[0014] By turning the handle, the valve stem drives the ball to rotate, thereby changing the shape of the channel inside the valve body and realizing the on-off control of fluid. The valve seat of the fixed ball valve is floating. The valve seat assembly is made of metal support ring inlaid with PEEK. The preload is provided by the combined disc spring behind the valve seat support ring. At the same time, under the action of the medium force, both the front and rear valve seats can provide reliable sealing, which can ensure that the valve has good sealing performance in the closed state. Attached Figure Description

[0015] Figure 1 This is a sectional view of the front view of a high-pressure soft-seal manually fixed ball valve.

[0016] Figure 2 For high-pressure manual fixed ball valves with soft seals Figure 1 A magnified structural diagram of part A in the middle.

[0017] In the diagram: 1. Valve body; 2. O-ring; 3. Opening retainer; 4. Retainer; 5. Fixer; 6. Thrust ring; 7. Disc spring; 8. Sealing ring; 9. Fixing nut; 10. Pin; 11. Screw; 12. Handle seat; 13. Valve stem; 14. Handle; 15. Thrust pad; 16. Bearing seat; 17. Bearing; 18. End cap; 19. Ball; 20. Lower end cap. Detailed Implementation

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-2 In this utility model, a high-pressure soft-seal manual fixed ball valve includes a valve body 1. The valve body 1 is provided with a thrust pad 15, a bearing seat 16, a bearing 17, a valve stem 13 and a ball 19. A lower end cover 20 is provided below the valve body 1. The lower end cover 20 is fastened to the valve body 1 by threads.

[0021] Both the upper and lower ends of the valve body 1 are provided with O-rings 2 and retaining rings 4. The sealing of the upper and lower ends of the valve body 1 is achieved by O-rings 2 and retaining rings 4. The O-ring 2 outside the valve stem 13 is a dynamic seal, with two sealing rings to ensure reliable sealing throughout the service life. The O-ring 2 outside the lower end cover 20 is a static seal, with a single sealing ring design.

[0022] The valve seat assembly consists of a retainer 5, a sealing ring 8, a disc spring 7, a thrust ring 6, an O-ring 2, and a retaining ring 4. The sealing ring 8 is made of PEEK, which provides both strength and a soft seal, ensuring a reliable seal. The Z-shaped thrust ring 6 ensures sufficient contact width with the disc spring 7 and full contact with the O-ring 2 and retaining ring 4. At the same time, the inner diameter of the thrust ring 6 has sufficient contact length with the valve seat, ensuring the stability of the valve seat. The valve seat O-ring 2 and sealing ring 8 are designed with a double piston effect, ensuring a seal regardless of whether the medium enters from the left end, the right end, or both ends simultaneously, and also ensuring a seal even when the medium in the middle cavity is empty.

[0023] End caps 18 are installed on both sides of the valve body 1. The valve body 1 and the end caps 18 are sealed by O-rings 2. The valve seat assembly and the end caps 18 are installed sequentially from both sides of the valve body 1. Finally, the valve body 1 is fastened to the end caps 18 by the threads. The seals between the end caps 18 and the valve body 1 and between the valve seat assembly and the end caps 18 are also sealed by O-rings 2.

[0024] A handle seat 12 is fitted onto the valve stem 13 and connected to it as a whole by screws 11. A pin 10 is provided between the valve body 1 and the handle seat 12. The pin 10 can be used to reinforce the handle seat 12 and the valve body 1. The handle seat 12 is connected to the handle 14 by internal hex screws. An open retaining ring 3 is provided inside the valve body 1. A set of fixing nuts 9 is provided on the outside of the valve body 1.

[0025] The working principle of this utility model is as follows: The ball 19 and valve stem 13 adopt a bottom-mounted design. Thrust pad 15, bearing seat 16, bearing 17, valve stem 13, ball 19, and bearing 17 are sequentially installed from the lower opening of the valve body 1. Finally, the lower end cover 20 is threaded and fastened to the valve body 1. The sealing of the upper and lower ends of the valve body 1 is achieved by O-rings 2 and retaining rings 4. The O-ring 2 outside the valve stem 13 is a dynamic seal, with two sealing rings to ensure reliable sealing throughout its service life. The O-ring 2 outside the lower end cover 20 is a static seal, with a single sealing ring design. The valve seat assembly consists of a retainer 5, sealing ring 8, disc spring 7, thrust ring 6, O-ring 2, and retaining ring 4. The sealing ring 8 is made of PEEK material, which has both strength and soft sealing properties, ensuring reliable sealing. The Z-shaped thrust ring... 6 ensures sufficient contact width with the disc spring 7, and full contact with the O-ring 2 and the retaining ring 4. At the same time, the inner diameter of the thrust ring 6 has sufficient contact length with the valve seat, ensuring the stability of the valve seat. The valve seat O-ring 2 and sealing ring 8 are designed with a double piston effect to ensure sealing regardless of whether the medium enters from the left end, the right end, or both ends simultaneously. Sealing is also guaranteed even when the medium in the middle cavity is empty. The valve seat assembly and end cap 18 are installed sequentially from both sides of the valve body 1, and finally fastened to the valve body 1 through the thread of the end cap 18. The seals between the end cap 18 and the valve body 1, and between the valve seat assembly and the end cap 18, are also sealed by the O-ring 2. The handle seat 12 is fitted onto the valve stem 13 and connected as a whole by screws 11. The handle 14 and the handle seat 12 are fixed together by internal hex screws.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A soft-sealed manual fixed ball valve for high pressure, characterized in that: The utility model discloses a valve body (1), the inside of valve body (1) is provided with thrust pad (15), bearing seat (16), bearing (17), valve stem (13) and ball (19), the lower end of valve body (1) is provided with lower end cover (20), the upper end of valve body (1) is provided with O ring (2) and baffle ring (4) with the lower end of valve body (1), and valve seat assembly is composed of fixer (5), sealing ring (8), disc spring (7), thrust ring (6), O ring (2) and baffle ring (4), both sides of valve body (1) are installed with end cover (18), the valve stem (13) is equipped with handle seat (12) and is connected as an organic whole through screw (11), handle seat (12) is connected with handle (14) through internal hexagon screw, the inside of valve body (1) is provided with open baffle ring (3).

2. A soft-seal manual fixed ball valve for high pressure according to claim 1, characterized in that: The lower end cover (20) and the valve body (1) are connected through thread fastening.

3. A soft-seal fixed ball valve for high pressure according to claim 1, characterized in that: The sealing ring (8) is made of PEEK.

4. The soft-seal manual fixed ball valve for high pressure according to claim 1, characterized in that: The valve body (1) and the handle seat (12) are provided with a pin (10).

5. The soft-seal manual fixed ball valve for high pressure according to claim 1, characterized in that: The valve body (1) and the end cover (18) are sealed through the O ring (2).

6. A soft-seal manual fixed ball valve for high pressure according to claim 1, characterized in that: The valve body (1) is provided with a set of fixed nuts (9) outside.

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