A hard seal high pressure resistant valve structure

Abstract

The present invention relates to the technical field of valves, and in particular to a hard-sealed high-pressure resistant valve structure, comprising a valve body, an upper cover, an upper shell and a valve core; further comprising a screw, a torque-limiting joint, a driving shaft, a coupling, a handwheel, an opening and closing assembly and a threaded block assembly; a balancing hole which passes through from top to bottom is arranged on the valve core, an opening and closing assembly is installed inside the valve core, the lower end of the screw is rotatably connected to the valve core, the torque-limiting joint is concentrically connected to the lower end of the screw, the torque-limiting joint drives the opening and closing assembly to close or open the balancing hole, the threaded block assembly is installed in the middle of the upper cover, the middle part of the screw is rotatably screwed to the threaded block assembly, the upper end of the screw is concentrically connected to the lower end of the driving shaft through a coupling, the upper end of the driving shaft passes through a sealing assembly on the upper part of the upper shell and extends above the upper shell, and a handwheel is installed on the upper end of the driving shaft; the pressure above and below the valve core is balanced through the balancing hole, so that the opening of the valve core is more labor-saving, the impact force on the downstream pipeline is reduced, the high pressure resistance and the sealing performance are good.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a hard-sealed high-pressure resistant valve structure. Background Art

[0002] A hard-sealed valve is a type of valve that uses metal-to-metal sealing, and its sealing surface and valve seat are both made of metal materials. The Chinese utility model patent with publication number CN214699207U proposes a split angle metal hard-sealed stop valve, in which a No. 1 sealing ring and a No. 2 sealing ring are installed between the upper valve body and the left valve cover and between the lower valve body and the right valve body. When the valve bodies are assembled, the No. 1 nut at the connection is rotated, and the distance between the No. 1 nut and the No. 1 bolt is reduced. The upper valve body and the left valve cover and the lower valve body and the right valve body are squeezed by the sealing ring, so that there is no gap between the upper valve body and the left valve cover and the lower valve body and the right valve body, thereby achieving sealing at the connection between the upper valve body and the left valve cover and the lower valve body and the right valve body, which can provide good sealing conditions for the split angle metal hard-sealed stop valve. A rotary wheel is provided at the upper end of the upper valve body. Mechanism, a telescopic mechanism is arranged inside the upper valve body, when the hand wheel starts to be turned, the inner hydraulic rod in the rotating wheel mechanism moves downward through the hydraulic action between the upper hydraulic rod, and the contact head at its lower end pushes the contact head below, so that the valve core at the lower end of the lower hydraulic rod moves downward, and when the hand wheel is turned in the opposite direction, the contact head drags the fixed block, driving the lower hydraulic rod to move upward. By providing the rotating wheel mechanism and the telescopic mechanism, the split angle metal hard-sealed stop valve has the function of regulating and throttling the medium, and the distance between the No. 1 bolt and the No. 1 nut is changed by turning the nut between the upper valve body and the left valve cover and the lower valve body and the right valve body, and the valve body is fixedly connected, making the device more convenient and quick to assemble, and the internal parts are easy to replace later.

[0003] When the above-mentioned existing hard-sealed valve is used in a high-pressure pipeline, the pressure of the high-pressure liquid acts on the valve core, pressing the valve core against the sealing surface, resulting in a large force being required to lift the valve core to open it. Moreover, when the valve core is opened, the high-pressure liquid will rush into the downstream pipeline at a fast and large flow rate, exerting a large impact on the downstream pipeline. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a hard-sealed high-pressure resistant valve structure which balances the pressure above and below the valve core through a balancing hole, makes opening the valve core more labor-saving, reduces the impact force on the downstream pipeline, and is resistant to high pressure and has good sealing performance.

[0005] The invention discloses a hard-sealed high-pressure resistant valve structure, comprising a valve body, an upper cover, an upper shell and a valve core. A liquid outlet is arranged at the bottom of the valve body, a liquid inlet is arranged at the upper part of the side wall of the valve body, the upper cover is mounted on the upper port of the valve body, the upper shell is mounted on the upper cover, the valve core is lifted and slidably mounted inside the valve body, a hard sealing surface is arranged between the lower part of the valve core and the bottom wall of the valve body; the invention also comprises a screw, a torque limiting joint, a driving shaft, a coupling, a hand wheel, an opening and closing assembly and a threaded block assembly. A balancing hole which passes through from top to bottom is arranged on the valve core, an opening is arranged inside the valve core The closing assembly, the lower end of the screw is connected to the upper part of the valve core in a concentric rotation, the torque limiting joint is connected to the lower end of the screw in a concentric connection, the torque limiting joint drives the opening and closing assembly to close or open the balance hole, the threaded block assembly is installed in the middle of the upper cover, the middle part of the screw is rotatably screwed with the threaded block assembly, the upper end of the screw extends into the upper shell, the upper end of the screw is connected to the lower end of the drive shaft through a coupling, the upper end of the drive shaft passes through the sealing assembly on the upper part of the upper shell and extends above the upper shell, and a hand wheel is installed on the upper end of the drive shaft; when the valve core drops to the bottom of the valve body When the cam is in the state of being in a state of being in equilibrium, the cam is pressed downwards and the pressure of the cam is released, and the pressure of the cam is released upwards, and the cam is released upwards, and the pressure of the cam is released upwards, and the pressure of the cam is released upwards, and the pressure of the cam is released downward ...

[0006] A conical upper hard sealing surface is arranged at the lower edge of the valve core, and a conical lower hard sealing surface matching the upper hard sealing surface is arranged at the bottom wall edge of the valve body; the sealing contact area is increased by arranging the conical upper and lower hard sealing surfaces, thereby improving the sealing performance.

[0007] Preferably, it also includes a partition, multiple guide tubes and multiple tension springs. A groove is set at the bottom of the valve body, the partition is located below the valve core, multiple guide tubes are installed on the upper end surface of the partition, multiple tension springs are installed in the multiple guide tubes, and multiple plug holes are set on the lower end surface of the valve core. The multiple guide tubes are slidably inserted in the plug holes of the valve body respectively. The upper ends of the multiple tension springs are connected to the tops of the multiple plug holes. The elastic force of the multiple tension springs tightens the partition to the lower end surface of the valve core; when the opening and closing component opens the balance hole of the valve core, the high-pressure liquid above the valve core pushes the partition downward to the valve through the balance hole. On the bottom of the groove of the valve body, a small space is formed between the partition and the lower end surface of the valve core. When the high-pressure liquid fills the small space, the pressure on the upper and lower parts of the valve core is balanced. Since the pressure can be balanced by only filling the small space with high-pressure liquid, the valve core can be opened faster. Since the partition and the bottom of the groove are not sealed, the partition is raised by multiple tension springs when the valve core is lifted. When the partition is lifted to above the liquid inlet of the valve body, the elastic force of the multiple tension springs lifts the partition to the lower end surface of the valve core, and the multiple guide tubes guide the partition.

[0008] Preferably, the opening and closing assembly includes a gear 1, a sealing disc and a gear ring 1, a transmission chamber and a sealing chamber connected to each other are arranged in the middle of the valve core, the sealing chamber is connected to the balancing hole of the valve core, the gear 1 is installed concentrically on the output end of the torque limiting joint, the gear 1 is located in the transmission chamber, the sealing disc is rotatably installed in the sealing chamber, the axis of the sealing disc is parallel to the screw, a vertical through hole is eccentrically arranged on the sealing disc, the through hole matches the balancing hole of the valve core, a hard sealing surface is arranged between the upper end face and the lower end face of the sealing disc and the sealing chamber, a gear ring 1 is arranged on the side wall of the sealing disc, and the gear ring 1 is meshed with the gear 1; the screw drives the gear 1 to rotate through the torque limiting joint, the gear 1 meshes with the gear ring 1 to drive the sealing disc to rotate, when the through hole of the sealing disc is aligned with the balancing hole of the valve core, the balancing hole is connected up and down, so that the high-pressure liquid flows downward through the balancing hole, when the through hole of the sealing disc is staggered with the balancing hole of the valve core, the balancing hole is cut off by the sealing disc, and the hard sealing surface between the sealing disc and the sealing chamber of the valve core improves the sealing performance.

[0009] Preferably, it also includes an arc groove 1 and a limit rod 1. The upper end surface of the sealing disc is provided with an arc groove 1 of 1-80 degrees. The arc groove 1 is concentric with the sealing disc. The limit rod 1 is installed on the top of the sealing cavity of the valve core. The limit rod 1 is slidably connected with the arc groove 1. The arc groove 1 and the limit rod 1 are slidably connected to limit the rotation angle of the sealing disc. When the limit rod 1 is located at one end of the arc groove 1, the through hole of the sealing disc is aligned with the balance hole of the valve core. When the limit rod 1 is located at either end of the arc groove 1, the sealing disc is limited. At this time, the screw continues to rotate so that the torque applied to the torsion limiting joint is greater than the rated value and then it rotates freely, thereby avoiding the sealing disc from rotating at will and improving the positioning accuracy of the sealing disc.

[0010] Preferably, the opening and closing assembly includes a bevel gear 1, a sealing shaft and a bevel gear 2. A transmission chamber and a sealing chamber are connected in the middle of the valve core. The sealing chamber is connected to the balance hole of the valve core. The bevel gears are coaxially mounted on the output shaft of the torque limiting joint. The bevel gear 1 is located in the transmission chamber of the valve core. The sealing shaft is rotatably mounted in the sealing chamber of the valve core. The axis of the sealing shaft is perpendicular to the screw. A vertical through hole is arranged in the middle of the sealing shaft. The through hole matches the through hole of the valve core. A hard seal is arranged between the outer wall of the sealing shaft and the sealing chamber of the valve core. The cover, bevel gear two is concentrically installed on the end of the sealing shaft, and bevel gear two is meshed with bevel gear one; the screw drives bevel gear one to rotate through the torque limiting joint, and bevel gear one meshes with bevel gear two to drive the sealing shaft to rotate. When the through hole of the sealing shaft is aligned with the balancing hole of the valve core, the balancing hole is connected up and down, so that the high-pressure liquid flows downward through the balancing hole. When the through hole of the sealing shaft and the balancing hole of the valve core are staggered, the balancing hole is cut off by the sealing shaft, and the hard sealing surface between the sealing shaft and the sealing cavity of the valve core improves the sealing performance.

[0011] Preferably, it also includes an arc groove 2 and a limit rod 2. An arc groove 2 with a 90-degree angle is set on the end face of the sealing shaft rod away from the bevel gear 2. The arc groove 2 is concentric with the sealing shaft rod. The limit rod 2 is installed in the sealing cavity of the valve core. The limit rod 2 is slidably connected to the arc groove 2; the limit rod 2 is slidably connected to the arc groove 2 to limit the rotation angle of the sealing shaft rod. When the limit rod 2 is located at one end of the arc groove 2, the through hole of the sealing shaft rod is aligned with the balance hole of the valve core. When the limit rod 2 is located at either end of the arc groove 2, the sealing shaft rod is limited. At this time, the screw continues to rotate so that the torque applied to the torsion limiting joint is greater than the rated value and then it rotates freely, thereby avoiding the sealing shaft rod from rotating at will and improving the positioning accuracy of the sealing shaft rod.

[0012] Preferably, the threaded block assembly includes a cover shell and a threaded hole block, the cover shell is installed in the middle of the upper end surface of the upper cover, an installation cavity is arranged inside the cover shell, the threaded hole block is movably installed in the installation cavity of the cover shell, a threaded hole is arranged in the middle of the threaded hole block, and the screw is rotatably threaded with the threaded hole block; when the screw rotates, it cooperates with the thread of the threaded hole block. At the beginning, the threaded hole block is driven by the screw to move in the cover shell, and when the threaded hole block reaches the top or bottom of the cover shell, the screw starts to lift and descend. When the threaded hole block moves in the cover shell, the valve core will not rise or fall, and the screw drives the opening and closing assembly to move through the torque limiting joint, which is more labor-saving.

[0013] Preferably, it also includes two push plates, two springs, two special-shaped wheels and two vertical shafts, the threaded hole block is set as a split left part and a right part, the left part and the right part of the threaded hole block are relatively slidably installed in the cover shell, the two push plates are respectively installed on the outer walls of the left and right parts of the threaded hole block, the outer ends of the two push plates extend out of the left and right sides of the cover shell respectively, the outer ends of the two springs are respectively connected to the two push plates, the inner ends of the two springs are connected to the two ends of the cover shell, the elastic force of the two springs pushes the left and right parts of the threaded hole block outwards, and the two vertical shafts are vertically rotatably installed on the left and right parts inside the upper shell. The lower ends of the two vertical shafts are concentrically mounted with special-shaped wheels, and the side walls of the two special-shaped wheels are relatively provided with notches matching the push plates; the two special-shaped wheels are rotated by the two vertical shafts, and when the outer ends of the two push plates are respectively inserted into the notches of the two special-shaped wheels, the elastic force of the two springs pushes the left and right parts of the threaded hole block outwards through the two push plates, so that the threads of the left and right parts of the threaded hole block are separated from the threads of the screw. At this time, rotating the screw will not drive the valve core to rise and fall, but only drive the opening and closing assembly to move. The valve core can also be quickly pushed downward by pressing the handwheel, thereby shortening the valve closing time.

[0014] Preferably, it also includes a second gear ring, a plurality of levers, two bipolar gears and two second gears, the second gear ring is sleeved on the outer side of the driving shaft, the second gear ring is installed on the top wall of the upper shell through a bearing, the upper ends of the plurality of levers are connected to the lower end surface of the second gear ring, a plurality of sliding holes are arranged on the coupling, the plurality of levers are slidably inserted into the plurality of sliding holes of the coupling respectively, the two bipolar gears are rotatably installed on the top wall of the upper shell, the large gears of the two bipolar gears are meshed with the second gear ring, the small gears of the two bipolar gears are meshed with the second gear respectively, the two second gears are concentrically installed on the two vertical shafts respectively, and the diameter of the second gear is larger than the small gear of the bipolar gear Gear diameter; when the driving shaft drives the screw to rotate through the coupling, the coupling drives the gear ring 2 to rotate through multiple levers, the gear ring 2 engages to drive the bipolar gear to rotate, the bipolar gear engages to drive gear 2 to rotate, the two gears 2 drive the two vertical shafts to rotate synchronously, the two vertical shafts drive the two special-shaped wheels to rotate, and the linkage between the screw and the left and right parts of the threaded hole block is realized. By optimizing the transmission ratio between the gear ring 2, the bipolar gear and the gear 2, the outer ends of the two push plates are respectively inserted into the notches of the two special-shaped wheels during the action of the opening and closing component, so that the action of the opening and closing component takes precedence over the lifting and lowering of the valve core, which has good practicality.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: before opening the valve core, liquid is pre-delivered to the liquid outlet of the valve body through the balance hole to balance the pressure above and below the valve core, thereby making the opening of the valve core more labor-saving and reducing the impact force of the high-pressure liquid on the downstream pipeline at the moment the valve core is opened. The present invention is suitable for high-pressure pipelines, is resistant to high pressure, and has good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a partial cross-sectional structural schematic diagram of the valve core of the present invention in a state of closing the liquid outlet;

[0017] Figure 2 It is a front cross-sectional structural schematic diagram of the valve core of the present invention in a state of closing the liquid outlet;

[0018] Figure 3 It is a partial cross-sectional structural schematic diagram of the valve core of the present invention in a state where the liquid outlet is opened;

[0019] Figure 4 is an axonometric schematic diagram of the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the valve core, screw, torque limiting joint, drive shaft, coupling, hand wheel and partition;

[0021] Figure 6 It is a schematic diagram of the structure of the valve core, the screw, the torque limiting joint, the partition plate and an opening and closing component in the exploded state;

[0022] Figure 7 It is a schematic diagram of the structure of the screw, drive shaft, coupling and threaded block assembly;

[0023] Figure 8 It is a schematic diagram of the structure of the screw, drive shaft, coupling and threaded block assembly in an exploded state;

[0024] Fig. 9 It is a front cross-sectional structural diagram of the valve core, screw, torque limiting joint, partition and the second opening and closing component;

[0025] Fig.10 It is a structural schematic diagram of the exploded state of structures such as a valve core, a screw, a torque-limiting joint, a partition plate and a second opening and closing component.

[0026] Markings in the attached drawings: 1. valve body; 2. upper cover; 3. upper shell; 4. valve core; 5. screw; 6. torque limiting joint; 7. drive shaft; 8. coupling; 9. hand wheel; 10. partition; 11. guide tube; 12. tension spring; 13. gear one; 14. sealing disc; 15. gear ring one; 16. arc groove one; 17. limit rod one; 18. bevel gear one; 19. sealing shaft; 20. bevel gear two; 21. arc groove two; 22. limit rod two; 23. cover; 24. threaded hole block; 25. push plate; 26. spring; 27. special-shaped wheel; 28. vertical shaft; 29. ​​gear ring two; 30. lever; 31. bipolar gear; 32. gear two. DETAILED DESCRIPTION

[0027] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. Example

[0028] like Figures 1 to 6 As shown, a hard-sealed high-pressure resistant valve structure includes a valve body 1, an upper cover 2, an upper shell 3 and a valve core 4. A liquid outlet is arranged at the bottom of the valve body 1, a liquid inlet is arranged at the upper part of the side wall of the valve body 1, the upper cover 2 is mounted on the upper port of the valve body 1, the upper shell 3 is mounted on the upper cover 2, the valve core 4 is lifted and slidably mounted inside the valve body 1, and a hard sealing surface is arranged between the lower part of the valve core 4 and the bottom wall of the valve body 1; it also includes a screw 5, a torque limiting joint 6, a drive shaft 7, a coupling 8, a hand wheel 9, an opening and closing assembly and a threaded block assembly, a balancing hole penetrating from top to bottom is arranged on the valve core 4, and the valve The opening and closing assembly is installed inside the core 4, the lower end of the screw rod 5 is connected to the upper part of the valve core 4 in a concentric rotation, the torque limiting joint 6 is connected to the lower end of the screw rod 5 in a concentric manner, the torque limiting joint 6 drives the opening and closing assembly to close or open the balance hole, the thread block assembly is installed in the middle of the upper cover 2, the middle part of the screw rod 5 is rotatably screwed with the thread block assembly, the upper end of the screw rod 5 extends into the upper shell 3, the upper end of the screw rod 5 is concentrically connected to the lower end of the drive shaft 7 through the coupling 8, the upper end of the drive shaft 7 passes through the sealing assembly on the upper part of the upper shell 3 and extends above the upper shell 3, and the upper end of the drive shaft 7 is installed with a hand Wheel 9; a conical upper hard sealing surface is arranged at the lower edge of the valve core 4, and a conical lower hard sealing surface matching the upper hard sealing surface is arranged at the bottom wall edge of the valve body 1; the opening and closing assembly includes a gear 13, a sealing disc 14 and a gear ring 15, a transmission chamber and a sealing chamber are arranged in the middle of the valve core 4, the sealing chamber is connected with the balance hole of the valve core 4, the gear 13 is installed concentrically on the output end of the torque limiting joint 6, the gear 13 is located in the transmission chamber, the sealing disc 14 is rotatably installed in the sealing chamber, the axis of the sealing disc 14 is parallel to the screw 5, and the sealing disc A vertical through hole is eccentrically arranged at 14, and the through hole matches the balancing hole of the valve core 4. A hard sealing surface is arranged between the upper end face and the lower end face of the sealing disc 14 and the sealing cavity. A gear ring 15 is arranged on the side wall of the sealing disc 14, and the gear ring 15 is meshed with the gear 13; it also includes an arc groove 16 and a limiting rod 17. The upper end face of the sealing disc 14 is provided with an arc groove 16 of 1-80 degrees, and the arc groove 16 is concentric with the sealing disc 14. The limiting rod 17 is installed at the top of the sealing cavity of the valve core 4, and the limiting rod 17 is slidably connected with the arc groove 16.

[0029] When the valve core 4 drops to the bottom of the valve body 1, the hard sealing surface between the lower part of the valve core 4 and the bottom wall of the valve body 1 cooperates to close the liquid outlet of the valve body 1. When the through hole of the sealing disc 14 and the balancing hole of the valve core 4 are staggered, the balancing hole is cut off by the sealing disc 14. The hard sealing surface between the sealing disc 14 and the sealing cavity of the valve core 4 improves the sealing performance. By setting the conical upper hard sealing surface and the lower hard sealing surface, the sealing contact area is increased to improve the sealing performance. When the liquid outlet of the valve body 1 needs to be opened, the hand wheel 9 is driven to rotate The drive shaft 7 drives the screw 5 to rotate through the coupling 8, and the screw 5 drives the gear 13 to rotate through the torque limiting joint 6. The gear 13 engages with the gear ring 15 to drive the sealing disc 14 to rotate. When the through hole of the sealing disc 14 is aligned with the balance hole of the valve core 4, the balance hole is connected from top to bottom, so that the high-pressure liquid flows downward through the balance hole. When the arc groove 16 is slidably connected with the limit rod 17 to limit the rotation angle of the sealing disc 14, when the limit rod 17 is located at one end of the arc groove 16, , the through hole of the sealing disc 14 is aligned with the balancing hole of the valve core 4. When the limiting rod 17 is located at either end of the arc groove 16, the sealing disc 14 is limited. At this time, the screw 5 continues to rotate so that the torque applied to the torque limiting joint 6 is greater than the rated value and then rotates freely to prevent the sealing disc 14 from rotating at will. The high-pressure liquid on the upper part of the valve core 4 is input to the pipeline connected to the liquid outlet of the valve body 1 through the balancing hole until the pressure above and below the valve core 4 is close to balance. The drive shaft 7, coupling 8 and The screw 5 and the threaded block assembly cooperate to continue to lift the screw 5, and the screw 5 lifts the valve core 4. When the valve core 4 is higher than the liquid inlet of the valve body 1, the opening action of the valve core 4 is completed. Compared with the existing technology, before opening the valve core 4, liquid is pre-delivered to the liquid outlet of the valve body 1 through the balance hole to balance the pressure above and below the valve core 4, thereby making the opening of the valve core 4 more labor-saving and reducing the impact force of the high-pressure liquid on the downstream pipeline at the moment the valve core 4 is opened. It is suitable for high-pressure pipelines, resistant to high pressure, and has good sealing performance. Example

[0030] like Figure 4 , Fig. 9 and Fig.10As shown, a hard-sealed high-pressure resistant valve structure includes a valve body 1, an upper cover 2, an upper shell 3 and a valve core 4. A liquid outlet is arranged at the bottom of the valve body 1, a liquid inlet is arranged at the upper part of the side wall of the valve body 1, the upper cover 2 is mounted on the upper port of the valve body 1, the upper shell 3 is mounted on the upper cover 2, the valve core 4 is lifted and slidably mounted inside the valve body 1, and a hard sealing surface is arranged between the lower part of the valve core 4 and the bottom wall of the valve body 1; it also includes a screw 5, a torque limiting joint 6, a drive shaft 7, a coupling 8, a hand wheel 9, an opening and closing assembly and a threaded block assembly. A balancing hole penetrating from top to bottom is arranged on the valve core 4, an opening and closing assembly is installed inside the valve core 4, and the lower end of the screw 5 is connected to the upper part of the valve core 4 for concentric rotation. The torque limiting joint 6 is concentrically connected with the lower end of the screw rod 5, and the torque limiting joint 6 drives the opening and closing assembly to close or open the balance hole. The threaded block assembly is installed in the middle of the upper cover 2, and the middle part of the screw rod 5 is rotatably screwed with the threaded block assembly. The upper end of the screw rod 5 extends into the upper shell 3, and the upper end of the screw rod 5 is concentrically connected with the lower end of the drive shaft 7 through the coupling 8. The upper end of the drive shaft 7 passes through the sealing assembly on the upper part of the upper shell 3 and extends above the upper shell 3. A hand wheel 9 is installed on the upper end of the drive shaft 7; a conical upper hard sealing surface is set on the lower edge of the valve core 4, and a conical lower hard sealing surface matching the upper hard sealing surface is set on the bottom wall edge of the valve body 1; the opening and closing assembly includes a bevel gear- 18, sealing shaft 19 and bevel gear 20, a transmission chamber and a sealing chamber connected to each other are arranged in the middle of the valve core 4, the sealing chamber is connected to the balance hole of the valve core 4, bevel gear 18 is concentrically mounted on the output shaft of the torque limiting joint 6, bevel gear 18 is located in the transmission chamber of the valve core 4, the sealing shaft 19 is rotatably mounted in the sealing chamber of the valve core 4, the axis of the sealing shaft 19 is perpendicular to the screw 5, a vertical through hole is arranged in the middle of the sealing shaft 19, the through hole matches the through hole of the valve core 4, a hard sealing surface is arranged between the outer wall of the sealing shaft 19 and the sealing chamber of the valve core 4, bevel gear 20 is concentrically mounted at the end of the sealing shaft 19, bevel gear 20 Meshing with bevel gear 18; also includes arc groove 21 and limit rod 22, the end face of sealing shaft 19 away from bevel gear 20 is provided with arc groove 21 of 90 degrees, arc groove 21 is concentric with sealing shaft 19, limit rod 22 is installed in the sealing cavity of valve core 4, limit rod 22 is slidably connected with arc groove 21; thread block assembly includes cover shell 23 and threaded hole block 24, cover shell 23 is installed in the middle of the upper end face of upper cover 2, the inside of cover shell 23 is provided with installation cavity, threaded hole block 24 is movably installed in the installation cavity of cover shell 23, threaded hole is provided in the middle of threaded hole block 24, screw rod 5 is rotatably threaded with threaded hole block 24;It also includes two push plates 25, two springs 26, two special-shaped wheels 27 and two vertical shafts 28. The threaded hole block 24 is set as a split left and right part. The left and right parts of the threaded hole block 24 are relatively slidably installed in the cover shell 23. The two push plates 25 are respectively installed on the outer walls of the left and right parts of the threaded hole block 24. The outer ends of the two push plates 25 extend out of the left and right sides of the cover shell 23 respectively. The outer ends of the two springs 26 are respectively connected to the two push plates 25, and the inner ends of the two springs 26 are connected to the two ends of the cover shell 23. The elastic force of the two springs 26 pushes the left and right parts of the threaded hole block 24 outward. The two vertical shafts 28 are vertically rotatably installed on the left and right parts of the interior of the upper shell 3. The lower ends of the two vertical shafts 28 are concentrically installed with special-shaped wheels 27. The side walls of the two special-shaped wheels 27 The notches matching the push plate 25 are arranged opposite to each other; the gear ring 29, a plurality of levers 30, two bipolar gears 31 and two gears 32 are also included; the gear ring 29 is sleeved on the outer side of the driving shaft 7, the gear ring 29 is mounted on the top wall of the upper shell 3 through a bearing, the upper ends of the plurality of levers 30 are connected to the lower end surface of the gear ring 29, the coupling 8 is provided with a plurality of sliding holes, the plurality of levers 30 are respectively slidably inserted into the plurality of sliding holes of the coupling 8, the two bipolar gears 31 are rotatably mounted on the top wall of the upper shell 3, the large gears of the two bipolar gears 31 are meshed with the gear ring 29, the small gears of the two bipolar gears 31 are respectively meshed with the gear 2 32, the two gears 2 32 are respectively concentrically mounted on the two vertical shafts 28, and the diameter of the gear 2 32 is larger than the diameter of the small gear of the bipolar gear 31. ;

[0031] When the driving shaft 7 drives the screw 5 to rotate through the coupling 8, the coupling 8 drives the gear ring 2 29 to rotate through multiple levers 30, the gear ring 2 29 meshes to drive the bipolar gear 31 to rotate, the bipolar gear 31 meshes to drive the gear 2 32 to rotate, the two gears 2 32 drive the two vertical shafts 28 to rotate synchronously, and the two vertical shafts 28 drive the two special-shaped wheels 27 to rotate. When the outer ends of the two push plates 25 are respectively inserted into the gaps of the two special-shaped wheels 27, the elastic force of the two springs 26 pushes the left and right parts of the threaded hole block 24 outward through the two push plates 25, so that the threads of the left and right parts of the threaded hole block 24 are disengaged from the threads of the screw 5. At this time, the valve core 4 will not be driven to rise and fall by rotating the screw 5. The screw 5 drives the bevel gear 1 18 to rotate through the torsion limiting joint 6, and the bevel gear 1 18 meshes with the bevel gear 2 20 to drive the sealing shaft 19 to rotate. When the through hole of the sealing shaft 19 is aligned with the balancing hole of the valve core 4, the balancing hole is connected up and down, so that the high-pressure liquid passes through the balancing hole. The balance hole of the valve core 4 is cut off by the sealing shaft 19 when the through hole of the sealing shaft 19 is staggered with the balance hole of the valve core 4. The hard sealing surface between the sealing shaft 19 and the sealing cavity of the valve core 4 improves the sealing performance. The limiting rod 22 is slidably connected with the arc groove 21 to limit the rotation angle of the sealing shaft 19. When the limiting rod 22 is located at one end of the arc groove 21, the through hole of the sealing shaft 19 is aligned with the balance hole of the valve core 4. When the limiting rod 22 is located at the arc groove 21, the through hole of the sealing shaft 19 is aligned with the balance hole of the valve core 4. When the sealing shaft 19 is at either end of the two 21, the sealing shaft 19 is limited. At this time, the screw 5 continues to rotate so that the torque applied to the torque limiting joint 6 is greater than the rated value and then rotates freely, avoiding the sealing shaft 19 from rotating at will and improving the positioning accuracy of the sealing shaft 19. The driving shaft 7 drives the coupling 8 to continue to rotate, so that the sides of the two special-shaped wheels 27 push the two push plates 25 inward respectively, so that the left and right parts of the threaded hole block 24 clamp the screw 5 and threadedly connect them, thereby lifting or lowering the valve core 4.

[0032] The valve closing time is shortened. By optimizing the transmission ratio between the gear ring 29, the bipolar gear 31 and the gear 2 32, the outer ends of the two push plates 25 are respectively inserted into the gaps of the two special-shaped wheels 27 during the operation of the opening and closing component, so that the operation of the opening and closing component takes precedence over the lifting and lowering of the valve core 4, thereby realizing the linkage between the screw 5 and the left and right parts of the threaded hole block 24. Example

[0033] like Figure 1 , Figure 3 , Figure 6 and Fig.10As shown, on the basis of Example 1 and Example 2, it also includes a partition 10, multiple guide tubes 11 and multiple tension springs 12. A groove is set at the bottom of the valve body 1, and the partition 10 is located below the valve core 4. Multiple guide tubes 11 are installed on the upper end surface of the partition 10, and multiple tension springs 12 are installed in the multiple guide tubes 11. A plurality of plug holes are set on the lower end surface of the valve core 4, and the multiple guide tubes 11 are respectively slidably inserted in the plug holes of the valve body 1. The upper ends of the multiple tension springs 12 are connected to the tops of the multiple plug holes, and the elastic force of the multiple tension springs 12 tightens the partition 10 to the lower end surface of the valve core 4.

[0034] When the opening and closing assembly opens the balancing hole of the valve core 4, the high-pressure liquid above the valve core 4 pushes the partition 10 downward to the bottom of the groove of the valve body 1 through the balancing hole, so that a small space is formed between the partition 10 and the lower end surface of the valve core 4. When the high-pressure liquid fills the small space, the pressure of the upper and lower parts of the valve core 4 is balanced. Since the pressure can be balanced only by filling the small space with high-pressure liquid, the valve core 4 can be opened faster. Since the partition 10 is not sealed with the bottom of the groove, the partition 10 is lifted by multiple tension springs 12 when the valve core 4 is lifted. When the partition 10 is lifted to above the liquid inlet of the valve body 1, the elastic force of the multiple tension springs 12 lifts the partition 10 to the lower end surface of the valve core 4, and the multiple guide tubes 11 guide the partition 10.

[0035] like Figures 1 to 10As shown, a hard-sealed high-pressure resistant valve structure of the present invention, when working, first the valve core 4 drops to the bottom to close the liquid outlet of the valve body 1, when the liquid outlet of the valve body 1 needs to be opened, the driving shaft 7 is rotated by the hand wheel 9, the driving shaft 7 drives the screw 5 to rotate through the coupling 8, the screw 5 drives the torque limiting joint 6 to rotate, the coupling 8 drives the gear ring 2 29 to rotate through a plurality of levers 30, the gear ring 29 meshes to drive the bipolar gear 31 to rotate, the bipolar gear 31 meshes to drive the gear 2 32 to rotate, the two gears 2 32 drive the two vertical shafts 28 to rotate synchronously, the two vertical shafts 28 drive the two special-shaped wheels 27 to rotate, and then when the outer ends of the two push plates 25 are respectively inserted into the gaps of the two special-shaped wheels 27, the elastic force of the two springs 26 pushes the left and right parts of the threaded hole block 24 outward through the two push plates 25, so that the threads of the left and right parts of the threaded hole block 24 are separated from the threads of the screw 5, at this time, the valve core 4 will not be driven to rise and fall by rotating the screw 5, Then the torque limiting joint 6 drives the opening and closing assembly to open the balancing hole of the valve core 4. When the balancing hole is opened, the screw 5 continues to rotate so that the torque applied to the torque limiting joint 6 is greater than the rated value and then rotates freely. The high-pressure liquid on the upper part of the valve core 4 pushes the partition 10 downward to the bottom of the groove of the valve body 1 through the balancing hole, so that a small space is formed between the partition 10 and the lower end surface of the valve core 4. When the high-pressure liquid fills the small space, the pressure on the upper and lower parts of the valve core 4 is balanced. The drive shaft 7, the coupling 8 and the screw 5 are continued to be rotated by the hand wheel 9, so that the sides of the two special-shaped wheels 27 push the two push plates 25 inward, so that the left and right threads of the threaded hole block 24 are threadedly connected with the screw 5. Finally, the hand wheel 9 is continued to be rotated so that the threads of the threaded hole block 24 lift the screw 5, and the screw 5 lifts the valve core 4. When the valve core 4 is higher than the liquid inlet of the valve body 1, the elastic force of multiple tension springs 12 lifts the partition 10 to the lower end surface of the valve core 4, completing the opening action of the valve core 4.

[0036] The main functions achieved by the present invention are:

[0037] 1. Liquid is delivered to the liquid outlet of the valve body 1 in advance through the balance hole to balance the pressure above and below the valve core 4, so that the opening of the valve core 4 is more labor-saving;

[0038] 2. Reduce the impact of high-pressure liquid on the downstream pipeline when the valve core 4 is opened, suitable for high-pressure pipelines and resistant to high pressure;

[0039] 3. By temporarily creating a small space, the pressure can be balanced by filling the small space with high-pressure liquid, so that the valve core 4 can be opened faster;

[0040] 4. By using an openable threaded block assembly, the opening and closing assembly action takes precedence over the lifting and lowering of the valve core 4, making the opening of the valve core 4 more labor-saving.

[0041] A hard-sealed anti-high-pressure valve structure of the present invention has a common mechanical installation method, connection method or setting method, which can be implemented as long as it can achieve its beneficial effects; a hard-sealed anti-high-pressure valve structure of the present invention has a valve body 1, an upper cover 2, an upper shell 3, a valve core 4, a screw 5, a torque-limiting joint 6, a drive shaft 7, a coupling 8, a hand wheel 9, a guide tube 11, a tension spring 12, a gear 13, a sealing disc 14, a gear ring 15, a bevel gear 18, a sealing shaft 19, a bevel gear 20, a threaded hole block 24, a spring 26, a special-shaped wheel 27, a vertical shaft 28, a gear ring 29, a bipolar gear 31, and a gear 2 32, which are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative labor by technicians in this field.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A hard-sealed high-pressure resistant valve structure, comprising a valve body (1), an upper cover (2), an upper shell (3) and a valve core (4), wherein a liquid outlet is arranged at the bottom of the valve body (1), a liquid inlet is arranged at the upper part of the side wall of the valve body (1), the upper cover (2) is mounted on the upper port of the valve body (1), the upper shell (3) is mounted on the upper cover (2), the valve core (4) is mounted in a lifting and sliding manner inside the valve body (1), and a hard sealing surface is arranged between the lower part of the valve core (4) and the bottom wall of the valve body (1); characterized in that: It also includes a screw (5), a torque limiting joint (6), a drive shaft (7), a coupling (8), a hand wheel (9), an opening and closing assembly and a threaded block assembly. The valve core (4) is provided with a balancing hole extending upward and downward. The opening and closing assembly is installed inside the valve core (4). The lower end of the screw (5) is connected to the upper part of the valve core (4) in a concentric rotational manner. The torque limiting joint (6) is connected to the lower end of the screw (5) in a concentric connection. The torque limiting joint (6) drives the opening and closing assembly to close or open the balancing hole. The threaded block assembly is installed in the middle of the upper cover (2). The middle of the screw (5) is rotatably threadedly connected to the threaded block assembly. The upper end of the screw (5) extends into the upper shell (3). The upper end of the screw (5) is connected to the lower end of the drive shaft (7) in a concentric connection through the coupling (8). The upper end of the drive shaft (7) passes through the sealing assembly at the upper part of the upper shell (3) and extends above the upper shell (3). The hand wheel (9) is installed at the upper end of the drive shaft (7). The threaded block assembly comprises a cover shell (23) and a threaded hole block (24); the cover shell (23) is mounted on the middle part of the upper end surface of the upper cover (2); a mounting cavity is arranged inside the cover shell (23); the threaded hole block (24) is movably mounted in the mounting cavity of the cover shell (23); a threaded hole is arranged in the middle part of the threaded hole block (24); and the screw rod (5) is rotatably threadedly connected to the threaded hole block (24); It also includes two push plates (25), two springs (26), two special-shaped wheels (27) and two vertical shafts (28). The threaded hole block (24) is arranged as a left part and a right part, and the left part and the right part of the threaded hole block (24) are relatively slidably mounted in the cover shell (23). The two push plates (25) are respectively mounted on the outer walls of the left part and the right part of the threaded hole block (24). The outer ends of the two push plates (25) extend out of the left and right sides of the cover shell (23) respectively. The two springs (26) The outer ends of the two springs (26) are connected to the two push plates (25), the inner ends of the two springs (26) are connected to the two ends of the cover shell (23), the elastic force of the two springs (26) pushes the left and right parts of the threaded hole block (24) outward, and the two vertical shafts (28) are vertically rotatably mounted on the left and right parts inside the upper shell (3), and the lower ends of the two vertical shafts (28) are concentrically mounted with special-shaped wheels (27), and the side walls of the two special-shaped wheels (27) are relatively provided with notches matching the push plates (25).

2. A hard-sealed high-pressure resistant valve structure as claimed in claim 1, characterized in that: A conical upper hard sealing surface is provided at the lower edge of the valve core (4), and a conical lower hard sealing surface matching the upper hard sealing surface is provided at the bottom wall edge of the valve body (1).

3. A hard-sealed high-pressure resistant valve structure as claimed in claim 1, characterized in that: The valve body (1) further comprises a partition (10), a plurality of guide tubes (11) and a plurality of tension springs (12); a groove is arranged at the bottom of the valve body (1); the partition (10) is located below the valve core (4); a plurality of guide tubes (11) are installed on the upper end surface of the partition (10); a plurality of tension springs (12) are installed in each of the plurality of guide tubes (11); a plurality of insertion holes are arranged on the lower end surface of the valve core (4); the plurality of guide tubes (11) are respectively slidably inserted into the insertion holes of the valve body (1); the upper ends of the plurality of tension springs (12) are connected to the tops of the plurality of insertion holes; and the elastic force of the plurality of tension springs (12) tightens the partition (10) to the lower end surface of the valve core (4).

4. A hard-sealed high-pressure resistant valve structure as claimed in claim 1, characterized in that: The opening and closing assembly comprises a gear 1 (13), a sealing disc (14) and a gear ring 1 (15). A transmission chamber and a sealing chamber are connected in the middle of the valve core (4). The sealing chamber is connected to the balance hole of the valve core (4). The gear 1 (13) is installed concentrically on the output end of the torque limiting joint (6). The gear 1 (13) is located in the transmission chamber. The sealing disc (14) is rotatably installed in the sealing chamber. The axis of the sealing disc (14) is parallel to the screw (5). The sealing disc (14) is eccentrically provided with a vertical through hole, which matches the balance hole of the valve core (4). Hard sealing surfaces are provided between the upper end surface and the lower end surface of the sealing disc (14) and the sealing chamber. The side wall of the sealing disc (14) is provided with a gear ring 1 (15). The gear ring 1 (15) is meshed with the gear 1 (13).

5. A hard-sealed high-pressure resistant valve structure as claimed in claim 4, characterized in that: The valve body also includes an arc groove (16) and a limit rod (17). The upper end surface of the sealing disc (14) is provided with an arc groove (16) with an angle of 1-80 degrees. The arc groove (16) is concentric with the sealing disc (14). The limit rod (17) is installed at the top of the sealing cavity of the valve core (4). The limit rod (17) is slidably connected to the arc groove (16).

6. A hard-sealed high-pressure resistant valve structure as claimed in claim 1, characterized in that: The opening and closing assembly comprises a bevel gear 1 (18), a sealing shaft (19) and a bevel gear 2 (20). A transmission chamber and a sealing chamber are connected in the middle of the valve core (4). The sealing chamber is connected to the balance hole of the valve core (4). The bevel gear 1 (18) is coaxially mounted on the output shaft of the torque limiting joint (6). The bevel gear 1 (18) is located in the transmission chamber of the valve core (4). The sealing shaft (19) is rotatably mounted in the sealing chamber of the valve core (4). The axis of the sealing shaft (19) is perpendicular to the screw (5). A vertical through hole is arranged in the middle of the sealing shaft (19). The through hole matches the through hole of the valve core (4). A hard sealing surface is arranged between the outer wall of the sealing shaft (19) and the sealing chamber of the valve core (4). The bevel gear 2 (20) is coaxially mounted on the end of the sealing shaft (19). The bevel gear 2 (20) is meshed with the bevel gear 1 (18).

7. A hard-sealed high-pressure resistant valve structure as claimed in claim 6, characterized in that: The invention also comprises an arc groove 2 (21) and a limit rod 2 (22). The arc groove 2 (21) is arranged at an angle of 90 degrees on the end surface of the sealing shaft rod (19) which faces away from the bevel gear 2 (20). The arc groove 2 (21) is concentric with the sealing shaft rod (19). The limit rod 2 (22) is installed in the sealing cavity of the valve core (4). The limit rod 2 (22) is slidably connected to the arc groove 2 (21).

8. A hard-sealed high-pressure resistant valve structure as claimed in claim 1, characterized in that: The invention also comprises a second gear ring (29), a plurality of levers (30), two bipolar gears (31) and two second gears (32). The second gear ring (29) is sleeved on the outer side of the driving shaft (7). The second gear ring (29) is mounted on the top wall of the upper shell (3) through a bearing. The upper ends of the plurality of levers (30) are connected to the lower end surface of the second gear ring (29). The coupling (8) is provided with a plurality of sliding holes. The plurality of levers (30) are respectively slidably inserted into the plurality of sliding holes of the coupling (8). The two bipolar gears (31) are rotatably mounted on the top wall of the upper shell (3). The large gears of the two bipolar gears (31) are meshed with the second gear ring (29). The small gears of the two bipolar gears (31) are respectively meshed with the second gear (32). The two second gears (32) are respectively concentrically mounted on two vertical shafts (28). The diameter of the second gear (32) is larger than the diameter of the small gear of the bipolar gear (31).

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