High-frequency hard sealing ball valve

Abstract

The utility model relates to the technical field of mechanical engineering, and discloses a high-frequency hard sealing ball valve which comprises a main body valve, an auxiliary valve body is detachably connected to the right side of the main body valve, a ball core is arranged in the main body valve, one valve seat is connected to the interior of the main body valve in a sliding mode, the other valve seat is connected to the interior of the auxiliary valve body in a sliding mode, and the ball core is arranged in the main body valve. The right side of the main body valve is fixedly connected with a first sealing gasket, the right side of the interior of the main body valve is in threaded connection with a double-end stud, the exterior of the double-end stud is in threaded connection with a first hexagonal nut, the interior of the main body valve is rotationally connected with a valve rod, and the top of the valve rod is fixedly connected with a disassembling assembly used for disassembling the auxiliary valve body. According to the ball valve, the abrasion performance of the ball valve is improved, the valve seat can be continuously attached to the surface of the ball body after being damaged by long-time friction, meanwhile, certain thrust is achieved, and the service life of the valve is greatly prolonged.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering technology, and in particular to a high-frequency hard-seal ball valve. Background Technology

[0002] A ball valve is a type of valve mainly composed of a ball, seat, stem, and operating mechanism. Its internal structure is relatively simple, allowing for unobstructed flow of the medium and relatively low resistance. This reduces energy loss and improves system efficiency when transporting fluids. In the gas recovery system of steelmaking converters, ball valves need to be frequently opened and closed to control the gas flow. The metal sealing surface of a hard-seal ball valve can resist the corrosion of high-temperature gas, ensuring the safe operation of the system.

[0003] In existing technologies, it is difficult to improve the wear resistance of some sealed ball valves. Due to insufficient wear resistance, the sealing surface of the ball valve is easily worn during frequent opening and closing and media flow, resulting in poor sealing and leakage. This not only wastes the media but may also pollute the environment and even cause safety accidents in the case of some hazardous media. Therefore, in order to address the above shortcomings, a high-frequency hard-seal ball valve has been proposed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-frequency hard-seal ball valve, which aims to improve the problem of poor sealing caused by the difficulty in enhancing the wear resistance of some existing sealing ball valves.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-frequency hard-seal ball valve includes a main valve, a secondary valve body detachably connected to the right side of the main valve, a ball core inside the main valve, one valve seat slidably connected inside the main valve, another valve seat slidably connected inside the secondary valve body, a sealing gasket fixedly connected to the right side of the main valve, a double-ended stud threadedly connected to the right side of the main valve, a hexagonal nut threadedly connected to the external thread of the double-ended stud, a valve stem rotatably connected inside the main valve, a disassembly assembly for the secondary valve body fixedly connected to the top of the valve stem, and one of the secondary valve bodies slidably connected inside the main valve. A valve seat insert is provided. Another valve seat insert is slidably connected inside the secondary valve body. A spring is provided inside the main valve. A spring is provided inside the secondary valve body. A support ring is fixedly connected to the left side inside the valve seat insert. An O-ring is fixedly connected to the inside of the valve seat insert. A graphite sealing ring is fixedly connected to the right side inside the valve seat insert. An internal hexagon screw is threaded to the bottom inside the main valve. A cover is detachably connected to the bottom of the main valve. A lower flange gasket is fitted on the outside of the cover. A bushing is fitted on the outside of the cover. An actuator is fixedly connected to the top of the valve stem.

[0007] As a further description of the above technical solution:

[0008] The disassembly assembly includes an O-ring connected to it, a sealing gasket on top of the O-ring, packing inside the main valve, a pressure cap detachably connected to the top of the main valve, an external hexagonal bolt connected to the internal thread of the pressure cap, a hexagonal nut connected to the external thread of the external hexagonal bolt, a spring washer fitted on the outside of the hexagonal nut, and an external hexagonal bolt connected to the internal thread of the right side of the pressure cap.

[0009] As a further description of the above technical solution:

[0010] The disassembly assembly includes an O-ring connected to it, a sealing gasket on top of the O-ring, packing inside the main valve, a pressure cap detachably connected to the top of the main valve, an external hexagonal bolt connected to the internal thread of the pressure cap, a hexagonal nut connected to the external thread of the external hexagonal bolt, a spring washer fitted on the outside of the hexagonal nut, and an external hexagonal bolt connected to the internal thread of the right side of the pressure cap.

[0011] As a further description of the above technical solution:

[0012] The top of the lower flange gasket contacts the bottom of the main valve, and the bottom of the lower flange gasket contacts the bottom inner wall of the cover.

[0013] As a further description of the above technical solution:

[0014] The external thread of the hexagonal bolt is connected to the inside of the main valve, and the external sliding connection of the graphite sealing ring is to the inner wall of the main valve.

[0015] As a further description of the above technical solution:

[0016] The outer side of the second O-ring is slidably connected to the inner wall of the main valve, and the outer side of the support ring is slidably connected to the inside of the main valve.

[0017] This utility model has the following beneficial effects:

[0018] In this invention, the actuator rotates to drive the valve stem to rotate. The valve stem, connected to the ball, rotates 90 degrees to close the channel and rotates 90 degrees in the opposite direction to open the channel. The ball has two sealing valve seats on both sides. The valve seats have forward and backward movement. There are N spring columns on the back of the valve seats, which can be selected according to the thrust. This improves the wear performance of the ball valve. Even after long-term friction damage, the valve seats can continue to adhere to the surface of the ball and have a certain thrust, which greatly improves the service life of the valve. Attached Figure Description

[0019] Figure 1 This is a perspective view of the high-frequency hard-seal ball valve proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the secondary valve body structure of the high-frequency hard-seal ball valve proposed in this utility model;

[0021] Figure 3 for Figure 1 Enlarged view of point A in the image;

[0022] Figure 4 for Figure 1 Enlarged view of point B in the image.

[0023] Legend:

[0024] 1. Main valve; 2. Secondary valve body; 3. Ball core; 4. Valve seat; 5. Sealing gasket 1; 6. Double-ended stud; 7. Hex nut 1; 8. Valve stem; 9. O-ring 1; 10. Sealing gasket 2; 11. Packing; 12. Gland; 13. External hex bolt 1; 14. Hex nut 2; 15. Spring washer; 16. External hex bolt 2; 17. Valve seat insert; 18. Spring; 19. Support ring; 20. O-ring 2; 21. Graphite sealing ring; 22. Internal hex screw; 23. Lower flange gasket; 24. Cover; 25. Bushing; 26. Actuator. Detailed Implementation

[0025] 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.

[0026] Reference Figures 1 to 3 This utility model provides an embodiment of a high-frequency hard-seal ball valve, comprising a main valve 1. The main valve 1, as one of the core structures of the ball valve, provides the foundation for the installation and support of other components. The right side of the main valve 1 is detachably connected to the auxiliary valve body 2. This connection typically uses a double-ended stud 6 and a hexagonal nut 7 for fixation. The double-ended stud 6 passes through corresponding holes on the main valve 1 and the auxiliary valve body 2, and the hexagonal nut 7 is tightened at both ends of the double-ended stud 6, tightly connecting the main valve 1 and the auxiliary valve body 2 together. This design facilitates disassembly when maintenance or component replacement is required. A sealing gasket 5 is fixedly connected to the right side of the main valve 1. The sealing gasket 5 acts as a seal between the main valve 1 and the auxiliary valve body 2, preventing media leakage from the connection point. The sealing gasket 5 is typically made of a material with good elasticity and sealing performance, such as rubber or polytetrafluoroethylene. During installation, the sealing gasket 5 is compressed between the main valve 1 and the auxiliary valve body 2, filling the small gap between them and ensuring a tight seal.

[0027] The main valve 1 contains a ball core 3, a key component for controlling media flow, possessing excellent wear and corrosion resistance. The ball core 3 has a through-channel; rotating it aligns or offsets the channel with the valve body's inlet and outlet, thus opening and closing the valve. One valve seat 4 is slidably connected inside the main valve 1, and another valve seat 4 is slidably connected inside the secondary valve body 2. The valve seat 4 fits tightly with the ball core 3, sealing the media. The valve seat 4 is typically made of special materials, such as hard alloys or ceramics, to improve its wear resistance and sealing performance. The valve seat 4 can slide to a certain extent within both the main valve 1 and the secondary valve body 2 to accommodate the rotation of the ball core 3 and changes in media pressure. This sliding connection allows the valve seat 4 to better conform to the ball core 3, ensuring reliable sealing.

[0028] The main valve 1 is internally connected to a valve stem 8, which is a crucial component connecting the ball core 3 and the actuator 26. A disassembly assembly for removing the secondary valve body 2 is fixedly connected to the top of the valve stem 8. This assembly comprises several parts that work together to facilitate the removal of the secondary valve body 2. First, there is an O-ring 9, located at the connection point between the valve stem 8 and other components, which acts as a seal to prevent leakage of the medium from the valve stem 8. The O-ring 9 is typically made of a highly elastic rubber material, allowing it to fit tightly between the valve stem 8 and adjacent components, forming an effective seal. A second sealing gasket 10 is placed on top of the O-ring 9, further enhancing the sealing performance of the valve stem 8. The second sealing gasket 10 is typically made of a material similar to the first sealing gasket 5, providing good elasticity and sealing performance. The main valve 1 also contains packing 11, which fills the gap between the valve stem 8 and the valve body, serving both sealing and lubrication purposes. The packing 11 is typically made of fiber materials, graphite, etc., providing good wear resistance and sealing performance. The packing 11 is compacted during installation, filling the gap between the valve stem 8 and the valve body to prevent media leakage. A gland 12 is detachably connected to the top of the main valve 1. The gland 12 is fixed to the main valve 1 by bolts and nuts, applying pressure to the packing 11 to ensure that the packing 11 tightly wraps around the valve stem 8 and improves the sealing performance.

[0029] Reference Figure 1 , Figure 4 The gland 12 is typically made of metal and possesses sufficient strength and rigidity to withstand the pressure of the packing 11 and the influence of the external environment. An external hexagonal bolt 13 is threaded internally onto the gland 12, used to secure it to other components. A hexagonal nut 14 is threaded externally onto the hexagonal bolt 13, tightening it to secure the gland 12 firmly to the main valve 1. A spring washer 15 is fitted over the hexagonal nut 14, preventing it from loosening under vibration or other external forces. An external hexagonal bolt 16 is threaded internally on the right side of the gland 12; this bolt may be used to connect other components or as a backup fixing point to enhance the stability and reliability of the gland 12.

[0030] One valve seat insert 17 is slidably connected inside the main valve 1, and another valve seat insert 17 is slidably connected inside the secondary valve body 2. A spring 18 is installed inside both the main valve 1 and the secondary valve body 2. The spring 18 plays a crucial role in the ball valve, providing elastic support for the valve seat 4 and ensuring that the valve seat 4 remains tightly fitted to the surface of the ball core 3, maintaining good sealing performance. A support ring 19 is fixedly connected to the left side of the valve seat insert 17, supporting the spring 18 and the valve seat insert 17 and preventing the spring 18 from shifting or deforming during compression and extension. An O-ring 20 is fixedly connected inside the valve seat insert 17, sealing the gap between the valve seat insert 17 and the valve body to prevent media leakage from the gap between them. O-ring 20 is typically made of highly elastic rubber material, allowing it to fit tightly between the valve seat insert 17 and the valve body. A graphite sealing ring 21 is fixedly connected to the inside right side of the valve seat insert 17. The graphite sealing ring 21 has excellent high-temperature resistance, corrosion resistance, and sealing performance, ensuring the ball valve's sealing performance under harsh working conditions. The graphite sealing ring 21 is typically made of graphite material, possessing self-lubricating properties and a low coefficient of friction, reducing friction and wear between the valve seat insert 17 and the valve body. An internal hexagonal screw 22 is threaded to the bottom of the main valve body 1. The hexagonal screw 22 is used to fix other components or as a spare connection point to enhance the structural stability of the ball valve.

[0031] A cover 24 is detachably connected to the bottom of the main valve 1. The cover 24 seals the bottom of the ball valve, preventing media leakage and external impurities from entering the valve. The cover 24 is typically made of metal, providing good sealing and strength. A lower flange gasket 23 is fitted over the cover 24, sealing the connection between the main valve 1 and the flange of the connecting pipe or equipment. The lower flange gasket 23 is typically made of rubber, polytetrafluoroethylene (PTFE), or similar materials, offering good elasticity and sealing performance. When the lower flange is bolted to the flange of the connecting pipe or equipment, the lower flange gasket 23 is compressed, filling the gap between them to ensure a tight seal. A bushing 25 is fitted over the cover 24, protecting the valve stem 8 and reducing friction between the valve stem 8 and the cover 24. The bushing 25 is typically made of wear-resistant materials such as copper alloy or PTFE. An actuator 26 is fixedly connected to the top of the valve stem 8, which drives the ball valve to open and close. The actuator 26 is typically powered by electric, pneumatic or hydraulic means. Through its connection with the valve stem 8, it transmits the power to the ball core 3 to control the ball valve.

[0032] Working Principle: When the actuator 26 receives a control signal, it begins to rotate. The actuator 26 is typically powered by electric, pneumatic, or hydraulic actuators. Its precise rotational motion is transmitted to the valve stem 8, a key transmission component, via a specific connecting mechanism. This stem 8 is tightly connected to the ball. When the actuator 26 drives the valve stem 8 to rotate, the stem 8, using itself as an axis, transmits the rotational motion to the ball, causing it to rotate. Due to the design characteristics of the ball valve, the ball only needs to rotate 90 degrees to close the passage. When the ball rotates to a specific angle, the passage on the ball is perpendicular to the inlet and outlet passages of the valve body, thus blocking the flow of the medium and achieving the valve's closing function. Conversely, when the actuator 26 rotates 90 degrees in the opposite direction, the valve stem 8 drives the ball to rotate back, aligning the passage on the ball core 3 with the inlet and outlet passages of the valve body. The medium can then smoothly pass through the ball passage, completing the valve opening operation. A sealing seat 4 is located on each side of the ball, and these two sealing seats 4 play a crucial role in the valve's sealing performance. The valve seat 4 is designed to fit tightly against the ball surface, forming an effective sealing structure to prevent media leakage when the valve is closed. The valve seat 4 has the ability to move back and forth, allowing for minor displacement adjustments within a certain range. During valve use, due to frequent opening and closing operations and the impact of media flow, the valve seat 4 will gradually wear. To address this wear, multiple spring posts are located on the back of the valve seat 4. The number of these spring posts can be designed and adjusted according to actual needs, usually expressed as "N". The spring posts can adaptively adjust according to the magnitude of the thrust applied to the valve seat 4. When the valve seat 4 wears, the spring 18 will exert its elasticity, providing continuous spring force. This spring force will push the valve seat 4 forward, ensuring that the valve seat 4 always maintains a tight fit with the ball surface. Even with a certain degree of wear on the valve seat 4, the thrust of the spring 18 can ensure sufficient contact pressure between the valve seat 4 and the ball, thereby maintaining the valve's sealing performance.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-frequency hard-seal ball valve, comprising a main valve (1), characterized in that: The main valve (1) is detachably connected to a secondary valve body (2) on its right side. A ball core (3) is provided inside the main valve (1). One valve seat (4) is slidably connected inside the main valve (1). Another valve seat (4) is slidably connected inside the secondary valve body (2). A sealing gasket (5) is fixedly connected to the right side of the main valve (1). A double-ended stud (6) is threadedly connected to the right side of the main valve (1). A hexagonal nut (7) is threadedly connected to the external side of the double-ended stud (6). A valve stem (8) is rotatably connected inside the main valve (1). A disassembly assembly for the secondary valve body (2) is fixedly connected to the top of the valve stem (8). One valve seat insert (17) is slidably connected inside the main valve (1). The secondary valve body (2) has a... Another valve seat insert (17) is slidably connected. A spring (18) is provided inside the main valve (1). A spring (18) is provided inside the secondary valve body (2). A support ring (19) is fixedly connected to the left side inside the valve seat insert (17). An O-ring (20) is fixedly connected to the inside of the valve seat insert (17). A graphite sealing ring (21) is fixedly connected to the right side inside the valve seat insert (17). An internal hexagon screw (22) is threaded to the bottom of the main valve (1). A cover (24) is detachably connected to the bottom of the main valve (1). A lower flange gasket (23) is fitted on the outside of the cover (24). A bushing (25) is fitted on the outside of the cover (24). An actuator (26) is fixedly connected to the top of the valve stem (8).

2. The high-frequency hard-seal ball valve according to claim 1, characterized in that: The disassembly assembly includes an O-ring (9) connected to the top of the O-ring (9), a sealing gasket (10) on the top of the O-ring (9), a packing (11) inside the main valve (1), a pressure cap (12) detachably connected to the top of the main valve (1), an external hexagonal bolt (13) connected to the internal thread of the pressure cap (12), a hexagonal nut (14) connected to the external thread of the external hexagonal bolt (13), a spring washer (15) sleeved on the external side of the hexagonal nut (14), and an external hexagonal bolt (16) connected to the internal thread of the right side of the pressure cap (12).

3. The high-frequency hard-seal ball valve according to claim 2, characterized in that: The external of the double-ended stud (6) is detachably connected to the top of the sub-valve body (2), and the bottom of the spring washer (15) is in contact with the top of the pressure cap (12).

4. The high-frequency hard-seal ball valve according to claim 1, characterized in that: The top of the lower flange gasket (23) is in contact with the bottom of the main valve (1), and the bottom of the lower flange gasket (23) is in contact with the bottom inner wall of the cover (24).

5. The high-frequency hard-seal ball valve according to claim 1, characterized in that: The external thread of the external hexagonal bolt (13) is connected to the inside of the main valve (1), and the external sliding connection of the graphite sealing ring (21) is connected to the inner wall of the main valve (1).

6. The high-frequency hard-seal ball valve according to claim 1, characterized in that: The outer side of the O-ring 2 (20) is slidably connected to the inner wall of the main valve (1), and the outer side of the support ring (19) is slidably connected to the inside of the main valve (1).

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