Self-adaptive safety pressure control device of high-temperature and high-pressure valve
By designing an adaptive safety pressure control device, using hydraulic pressure relief and water hammer pressure relief structures, the safety problems of traditional high-temperature and high-pressure valves in pressure fluctuations are solved, precise control of pressure and stable operation of the system are achieved, and accidents are prevented.
Patent Information
- Application Number
- CN202510589699.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-08
- Publication Date
- 2025-07-29
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional high-temperature and high-pressure valves lack adaptive pressure control mechanisms and cannot effectively deal with pressure fluctuations, resulting in accidents such as pipeline rupture, valve seal failure, leakage or explosion, and low production efficiency.
An adaptive safety pressure control device for high-temperature and high-pressure valves is designed, including hydraulic pressure relief and water hammer pressure relief structures. It releases pressure through hydraulic oil buffering and safety pressure relief pipes, combined with mechanical transmission, realizes dynamic buffering and adjustment of pressure, prevents too high or too low pressure, and ensures stable operation of the system.
It realizes timely pressure relief for high-temperature and high-pressure valves, prevents pipeline rupture and explosion, reduces the risk of leakage and damage caused by the water hammer effect, and improves the accuracy of pressure control and the safety and stability of the system.
Smart Images
Figure CN120384978A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of valve pressure control, and particularly relates to an adaptive safety pressure control device for high-temperature and high-pressure valves. Background Art
[0002] In many fields such as industrial production and energy transmission, high-temperature and high-pressure valves are widely used in various pipeline systems, and their safe and stable operation is crucial for the normal operation of the entire system. However, traditional high-temperature and high-pressure valves have a series of problems that cannot be ignored when facing complex working conditions, and these problems constitute the research background of the present invention. In a high-temperature and high-pressure environment, the pressure fluctuations in the pipeline are frequent and intense. On the one hand, operations such as the adjustment of process parameters and the start and stop of equipment during production will cause pressure changes; on the other hand, external environmental factors (such as sudden temperature changes and sudden flow rate changes) will also affect the pipeline pressure. Traditional valves lack an effective adaptive pressure control mechanism and are difficult to accurately respond to these pressure fluctuations. When the pressure is too high, it may cause pipeline rupture, valve seal failure, resulting in serious accidents such as leakage and even explosion; when the pressure is too low, it will affect production efficiency and cannot meet the process requirements. For example, in petrochemical production, the valve between the reactor and the conveying pipeline frequently fails due to its inability to adapt to pressure changes in a timely manner, resulting in production interruption and economic losses.
[0003] Therefore, those skilled in the art have provided an adaptive safety pressure control device for high-temperature and high-pressure valves to solve the problems raised in the above background art. Summary of the Invention
[0004] To solve the above technical problems, the present invention provides: An adaptive safety pressure control device for a high-temperature and high-pressure valve, comprising: a valve body pipe fitting; flange plates are integrally fixed at both ends of the valve body pipe fitting, and a safety pressure control structure for the safety pressure control of the conveying pipeline is detachably and sealingly assembled at one end of the valve body pipe fitting through the flange plate; The safety pressure control structure includes a pressure control pipe fitting, and a hydraulic pressure relief pipe is integrally fixed at the bottom of the pressure control pipe fitting. A tapered groove is formed through between the hydraulic pressure relief pipe and the pressure control pipe fitting, and a hydraulic buffer groove is formed inside the hydraulic pressure relief pipe. A hydraulic seal plug is sealingly and movably arranged inside the hydraulic buffer groove; The hydraulic pressure relief pipe and the hydraulic return pipe are connected through a hydraulic oil pipe; The safety pressure control structure is connected with a pipe body pressure relief structure for secondary pressure relief of the conveying pipeline; A water hammer pressure relief structure for eliminating the water hammer effect of the conveying pipeline when the valve body pipe fitting is closed is assembled on the safety pressure control structure.
[0005] Preferably, one side of the hydraulic pressure relief pipe is connected throughly with a safety pressure relief pipe, and a vertical sealing groove is vertically formed on one side of the hydraulic pressure relief pipe where the safety pressure relief pipe is located. A vertical sealing plate fixedly assembled with a hydraulic sealing plug is hermetically and movably arranged inside the vertical sealing groove.
[0006] Preferably, a reset rod is integrally fixed at the top of the buffer sealing plug, and the reset rod vertically penetrates through the outside of the top end of the hydraulic return pipe. A reset spring sleeved outside the reset rod is arranged between the hydraulic return pipe and the buffer sealing plug; An arc-shaped groove I corresponding to the specification of the safety pressure relief pipe is formed on the surface of the hydraulic sealing plug.
[0007] Preferably, the pipe body pressure relief structure includes a pressure control pressure relief pipe. One side of the pipe body pressure relief structure is connected throughly with a pressure relief inlet pipe detachably and hermetically assembled with the safety pressure relief pipe. A pressure relief inlet groove is formed on the inner wall of the pressure control pressure relief pipe at the upper end of the pressure relief inlet pipe; The other side of the pressure control pressure relief pipe is connected throughly with a pressure relief discharge pipe, and a closing disc is detachably and hermetically assembled outside the pressure relief discharge pipe.
[0008] Preferably, a pressure relief sealing plug is movably and hermetically arranged inside the pressure control pressure relief pipe. A tension spring is assembled between the pressure relief sealing plug and the pressure control pressure relief pipe. A flow limiting air hole is formed at the bottom end of the pressure control pressure relief pipe at the lower end of the tension spring; An arc-shaped groove II corresponding to the specification of the pressure relief discharge pipe is formed on the surface of the pressure relief sealing plug.
[0009] Preferably, a liquid return pipe penetrates through the top end of the pressure control pressure relief pipe. A one-way valve body is assembled between the liquid return pipe and the pressure control pressure relief pipe. A return connection pipe is detachably and hermetically assembled at the top of the liquid return pipe. One end of the return connection pipe far away from the liquid return pipe is hermetically butted with a butting pipe, and an assembly pipe is integrally fixed on the butting pipe; A liquid level sensor is assembled on the inner wall of the pressure control pressure relief pipe, and a buzzer arranged outside the pressure control pressure relief pipe is connected to the side of the liquid level sensor; A sealing disc is detachably and hermetically assembled on the butting pipe not assembled with the return connection pipe.
[0010] Preferably, the water hammer pressure relief structure includes a stress elimination box fixedly assembled on the pressure control pipe fitting. A stress elimination groove is formed throughly between the stress elimination box and the pressure control pipe fitting; A protective shell is fixedly arranged between the stress elimination box and the hydraulic return pipe.
[0011] Preferably, a toothed rack I fixedly assembled with the reset rod is movably arranged inside the protective shell, and the toothed rack I meshes with a spur gear rotatably arranged inside the protective shell; On the side of the spur gear away from the first tooth profile frame, there is a second tooth profile frame engaged with it. And a sealing rod is fixedly arranged on the second tooth profile frame. The bottom end of the sealing rod penetrates through the inside of the stress relief box in a sealed manner, and an arc-shaped plate that is fixedly arranged and movably arranged inside the stress relief groove is provided.
[0012] Preferably: A vertical valve pipe is integrally fixed in the middle of the valve body pipe fitting. And a valve core body is vertically movably arranged inside the vertical valve pipe. And a transmission screw rod is integrally fixed at the top end of the valve core body. A transmission screw barrel is helically driven on the outside of the transmission screw rod.
[0013] Preferably: A sealing top shell integrally fixed on the upper end of the valve core body is arranged on the outside of the transmission screw barrel. The transmission screw barrel is rotatably arranged inside the sealing top shell; A worm gear is fixedly arranged on the outer wall of the top end of the transmission screw barrel. And the worm gear is engaged with a worm. One end of the worm rotates through the outside of the sealing top shell and is integrally fixed with a hand wheel.
[0014] When the hand wheel is rotated, the worm will be driven to rotate by the hand wheel, and the rotating worm will drive the worm gear through meshing.
[0015] The technical effects and advantages of the present invention: In the present invention, the safety pressure control structure utilizes the hydraulic oil buffer and the safety pressure relief pipe to relieve pressure. The pipe body pressure relief structure can be connected in multiple numbers to increase the pressure relief capacity. When the pipeline pressure is too high, it can relieve pressure in a timely and effective manner, preventing serious accidents such as pipeline rupture and explosion caused by continuous pressure rise, and ensuring the safety of the pipeline system and the surrounding personnel and equipment.
[0016] In the present invention, the hammer pressure relief structure cooperates with the safety pressure control structure. When the valve body pipe fitting is closed, the pressure generated by the water hammer is released in a timely manner through mechanical transmission, avoiding the impact of the water hammer on the pipeline and the valve, reducing the risk of leakage and damage caused by the water hammer, and further improving the safety and stability of the system.
[0017] In the present invention, the pipe body pressure relief structure can be adaptively assembled multiple times according to the pressure in the pipeline, realizing dynamic buffering and adjustment of the pressure, keeping the pressure in the pipeline within a safe range, meeting the pressure control requirements under different working conditions. Multiple groups of pipe body pressure relief structures can accurately control the pressure relief amount according to the size of the pressure in the conveying pipeline, avoiding excessive or insufficient pressure relief, ensuring that the system can still operate stably during the pressure relief process, and improving the accuracy and reliability of pressure control Brief Description of the Drawings
[0018] Figure 1 It is a schematic structural diagram of an adaptive safety pressure control device for a high-temperature and high-pressure valve provided by the present application; Figure 2 It is a schematic cross-sectional structure diagram of the valve body pipe fitting in an adaptive safety pressure control device for a high-temperature and high-pressure valve provided by the present application; Figure 3 It is a front structural schematic diagram of an adaptive safety pressure control device for a high-temperature and high-pressure valve provided by this application; Figure 4 It is a split structural schematic diagram of an adaptive safety pressure control device for a high-temperature and high-pressure valve provided by this application; Figure 5 It is a sectional structural schematic diagram of a safety pressure control structure of an adaptive safety pressure control device for a high-temperature and high-pressure valve provided by this application; Figure 6 It is a structural schematic diagram of a vertical sealing plate of an adaptive safety pressure control device for a high-temperature and high-pressure valve provided by this application; Figure 7 It is a structural schematic diagram of a pipe body pressure relief structure of an adaptive safety pressure control device for a high-temperature and high-pressure valve provided by this application; Figure 8 It is a structural schematic diagram of the cross-section of a pressure control and pressure relief pipe of an adaptive safety pressure control device for a high-temperature and high-pressure valve provided by this application.
[0019] In the figure: 1. Valve body pipe fitting; 2. Safety pressure control structure; 201. Pressure control pipe fitting; 202. Hydraulic pressure relief pipe; 203. Conical groove; 204. Hydraulic buffer groove; 205. Hydraulic seal plug; 206. Hydraulic oil; 207. Vertical seal groove; 208. Vertical sealing plate; 209. Hydraulic oil pipe; 210. Hydraulic return pipe; 211. Buffer seal plug; 212. Reset rod; 213. Reset spring; 214. Safety pressure relief pipe; 215. First arc groove; 216. Return connection pipe; 3. Pipe body pressure relief structure; 301. Pressure control and pressure relief pipe; 302. Pressure relief inlet pipe; 303. Pressure relief inlet groove; 304. Pressure relief seal plug; 305. Second arc groove; 306. Tension spring; 307. Flow-limiting air hole; 308. Liquid return pipe; 309. Check valve body; 310. Return connection pipe; 311. Docking pipe; 312. Assembly pipe; 313. Liquid level sensor; 314. Buzzer; 315. Pressure relief discharge pipe; 316. Sealing disc; 4. Vertical valve pipe; 5. Valve core body; 6. Sealing top shell; 7. Transmission screw barrel; 8. Worm gear; 9. Worm; 10. Handwheel; 11. Transmission screw; 12. Water hammer pressure relief structure; 121. First toothed frame; 122. Straight gear; 123. Protective shell; 124. Second toothed frame; 125. Sealing rod; 126. Arc plate; 127. Stress elimination box; 128. Stress elimination groove. Detailed implementation method
[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The examples of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed form. Many modifications and variations will be obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles of the present invention and its practical applications, and to enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.
[0021] Example 1, please refer to Figures 1 to 2 , in this embodiment, an adaptive safety pressure control device for a high-temperature and high-pressure valve is provided, including: a valve body pipe fitting 1; both ends of the valve body pipe fitting 1 are integrally fixed with flange plates, and one end of the valve body pipe fitting 1 is detachably and sealingly assembled with a safety pressure control structure 2 for pipeline safety pressure control through a flange plate; the safety pressure control structure 2 uses a damping liquid to perform safety pressure relief treatment in a pipeline with a relatively high pressure; The safety pressure control structure 2 is connected to a pipe body pressure relief structure 3 for secondary pressure relief of the pipeline; multiple pipe body pressure relief structures 3 can be connected to increase the pressure relief of the pipeline; a water hammer pressure relief structure 12 for eliminating the water hammer effect of the pipeline when the valve body pipe fitting 1 is closed is assembled on the safety pressure control structure 2; the water hammer pressure relief structure 12 and the safety pressure control structure 2 can cooperate to eliminate the water hammer effect when the valve body pipe fitting 1 is closed; A vertical valve pipe 4 is integrally fixed in the middle of the valve body pipe fitting 1, and a valve core body 5 is vertically movably arranged inside the vertical valve pipe 4, and a transmission screw rod 11 is integrally fixed at the top end of the valve core body 5, and a transmission screw barrel 7 is helically driven outside the transmission screw rod 11; when the transmission screw barrel 7 rotates, the transmission screw rod 11 can be helically driven, so that the valve core body 5 is closed to the inside of the valve body pipe fitting 1.
[0022] A sealing top shell 6 integrally fixed at the upper end of the valve core body 5 is arranged outside the transmission screw barrel 7, and the transmission screw barrel 7 is rotatably arranged inside the sealing top shell 6; a worm gear 8 is fixedly arranged on the outer wall of the top end of the transmission screw barrel 7, and the worm gear 8 is engaged with a worm 9, one end of the worm 9 rotatably penetrates outside the sealing top shell 6, and a hand wheel 10 is integrally fixed; when the hand wheel 10 is rotated, the worm 9 will be driven to rotate by the hand wheel 10, and the rotating worm 9 will drive the worm gear 8 through meshing.
[0023] Example 2, please refer to Figures 3 to 6 , in this embodiment, a safety pressure control structure 2 and a water hammer pressure relief structure 12 in an adaptive safety pressure control device for a high-temperature and high-pressure valve are provided; The described safety pressure control structure 2 includes a pressure control pipe fitting 201, and a hydraulic pressure relief pipe 202 is integrally fixed to the bottom of the pressure control pipe fitting 201. A conical groove 203 is formed through between the hydraulic pressure relief pipe 202 and the pressure control pipe fitting 201. A hydraulic buffer groove 204 is formed inside the hydraulic pressure relief pipe 202, and a hydraulic seal plug 205 is hermetically and movably arranged inside the hydraulic buffer groove 204; The hydraulic pressure relief pipe 202 and the pressure control pipe fitting 201 are connected through the conical groove 203; The bottom of the hydraulic pressure relief pipe 202 is connected through a hydraulic oil pipe 209, and one end of the hydraulic oil pipe 209 away from the hydraulic pressure relief pipe 202 is integrally connected with a hydraulic return pipe 210. A buffer seal plug 211 is hermetically and movably arranged inside the hydraulic return pipe 210; The hydraulic pressure relief pipe 202 and the hydraulic return pipe 210 are connected through the hydraulic oil pipe 209; There is hydraulic oil 206 located inside the hydraulic pressure relief pipe 202, the hydraulic oil pipe 209 and the hydraulic return pipe 210 between the hydraulic seal plug 205 and the buffer seal plug 211; When the pressure from the conveying pipeline is applied to the hydraulic seal plug 205, it will push the hydraulic oil 206 to enter the hydraulic return pipe 210 through the hydraulic oil pipe 209, and the moving hydraulic oil 206 will push the buffer seal plug 211 to rise inside the hydraulic return pipe 210; One side of the hydraulic pressure relief pipe 202 is connected through a safety pressure relief pipe 214. A vertical seal groove 207 is vertically formed on one side of the hydraulic pressure relief pipe 202 where the safety pressure relief pipe 214 is located. A vertical seal plate 208 fixedly assembled with the hydraulic seal plug 205 is hermetically and movably arranged inside the vertical seal groove 207; The lower end of the vertical seal groove 207 is formed through with the hydraulic pressure relief pipe 202. When the hydraulic seal plug 205 moves downward to the bottom inside the hydraulic pressure relief pipe 202, the safety pressure relief pipe 214 can be exposed above the hydraulic seal plug 205, and the liquid in the conveying pipeline inside the hydraulic pressure relief pipe 202 with the pressure reaching the limit can be discharged through the safety pressure relief pipe 214, having a safety pressure relief effect; And the hydraulic oil 206 inside the hydraulic pressure relief pipe 202 can always be kept inside the internal spaces of the hydraulic pressure relief pipe 202, the hydraulic oil pipe 209 and the hydraulic return pipe 210 due to the blockage of the vertical seal plate 208; A reset rod 212 is integrally fixed to the top of the buffer seal plug 211, and the reset rod 212 is vertically and hermetically penetrated outside the top end of the hydraulic return pipe 210. A reset spring 213 sleeved outside the reset rod 212 is arranged between the hydraulic return pipe 210 and the buffer seal plug 211; The reset spring 213 has a pressure to reset the hydraulic oil 206. When the pressure applied to the buffer seal plug 211 is not sufficient to continuously compress the reset spring 213, the reset spring 213 will rebound due to the lack of pressure and move the hydraulic oil 206 for reset; An arc-shaped groove 215 is provided on the surface of the hydraulic sealing plug 205 corresponding to the specification of the safety pressure relief pipe 214. When the hydraulic sealing plug 205 moves to the bottom end of the hydraulic pressure relief pipe 202, the arc-shaped groove 215 will correspond to the position of the safety pressure relief pipe 214, and the liquid in the conveying pipeline can be quickly pressure-relieved and discharged into the safety pressure relief pipe 214 through the arc-shaped groove 215; The water hammer pressure relief structure 12 includes a stress relief box 127 fixedly assembled on the pressure control pipe fitting 201, and a stress relief groove 128 is provided through between the stress relief box 127 and the pressure control pipe fitting 201; A protective shell 123 is fixedly arranged between the stress relief box 127 and the hydraulic return pipe 210; The hydraulic return pipe 210 passes through the protective shell 123 and is fixedly arranged on the stress relief box 127 on the pressure control pipe fitting 201.
[0024] A toothed rack 121 fixedly assembled with a reset rod 212 is movably arranged inside the protective shell 123, and the toothed rack 121 is engaged with a spur gear 122 rotatably arranged inside the protective shell 123; A toothed rack 124 is engaged on the side of the spur gear 122 away from the toothed rack 121, and a sealing rod 125 is fixedly arranged on the toothed rack 124. The bottom end of the sealing rod 125 is hermetically penetrated inside the stress relief box 127, and an arc-shaped plate 126 that is hermetically and movably arranged inside the stress relief groove 128 is fixedly arranged; The toothed rack 121 and the toothed rack 124 are engaged through the spur gear 122. When the toothed rack 121 rises, it will engage the spur gear 122 to rotate, and through the spur gear 122, the toothed rack 124 will descend, so that the sealing rod 125 drives the arc-shaped plate 126 to descend inside the stress relief groove 128.
[0025] Embodiment 3, please refer to Figures 7 to 8 , in this embodiment, a pipe body pressure relief structure 3 in an adaptive safety pressure control device for a high-temperature and high-pressure valve is provided; The pipe body pressure relief structure 3 includes a pressure control pressure relief pipe 301, and a pressure relief inlet pipe 302 detachably and hermetically assembled with the safety pressure relief pipe 214 is connected through one side of the pipe body pressure relief structure 3. A pressure relief inlet groove 303 is provided on the inner wall of the pressure control pressure relief pipe 301 at the upper end of the pressure relief inlet pipe 302; The pressure relief inlet groove 303 discharges the pressure-relieved liquid flowing into the safety pressure relief pipe 214 and the pressure relief inlet pipe 302 to the upper end position of the pressure control pressure relief pipe 301; Another side of the pressure control pressure relief pipe 301 is connected through a pressure relief discharge pipe 315, and a closing disc is detachably and hermetically assembled on the outside of the pressure relief discharge pipe 315.
[0026] One of the pipe body pressure relief structures 3 can be detachably and sealingly assembled with the pressure relief discharge pipe 315 of another pipe body pressure relief structure 3 through the pressure relief inlet pipe 302 for applicable assembly according to the pressure condition that the conveying pipeline needs to relieve pressure.
[0027] A pressure relief sealing plug 304 is movably and sealingly arranged inside the pressure control and relief pipe 301, a tension spring 306 is assembled between the pressure relief sealing plug 304 and the pressure control and relief pipe 301, and a flow-limiting air hole 307 opened at the bottom end of the pressure control and relief pipe 301 is arranged at the lower end of the tension spring 306; The tension spring 306 is used for elastic reset of the pressure relief sealing plug 304; and the flow-limiting air hole 307 can discharge the air inside the pressure control and relief pipe 301 when the pressure relief sealing plug 304 descends.
[0028] An arc-shaped groove two 305 is formed on the surface of the pressure relief sealing plug 304 corresponding to the specification of the pressure relief discharge pipe 315; when the pressure relief sealing plug 304 descends to the position of the pressure relief discharge pipe 315, the liquid inside the pressure control and relief pipe 301 can be quickly discharged through the arc-shaped groove two 305 and the pressure relief discharge pipe 315, and a one-way valve for discharging the incoming liquid is assembled between the pressure relief discharge pipe 315 and the pressure control and relief pipe 301; a liquid return pipe 308 is penetrated and arranged at the top end of the pressure control and relief pipe 301, a one-way valve body 309 is assembled between the liquid return pipe 308 and the pressure control and relief pipe 301, a return connection pipe 310 is detachably and sealingly assembled at the top of the liquid return pipe 308, and one end of the return connection pipe 310 far away from the liquid return pipe 308 is sealingly butted with a butting pipe 311, and an assembly pipe 312 is integrally fixed on the butting pipe 311; a plurality of butting pipes 311 are arranged on the assembly pipe 312, and one end of each butting pipe 311 is detachably and sealingly assembled with a return connection pipe 216 integrally fixed with the pressure control pipe fitting 201; the liquid remaining in the pressure control and relief pipe 301 in the pipe body pressure relief structure 3 can flow back into the pressure control pipe fitting 201 through the return connection pipe 216 connected with the butting pipe 311; A liquid level sensor 313 is assembled on the inner wall of the pressure control and relief pipe 301, and a buzzer 314 arranged outside the pressure control and relief pipe 301 is connected to the side of the liquid level sensor 313; a sealing disc 316 is detachably and sealingly assembled on the butting pipe 311 not assembled with the return connection pipe 310.
[0029] According to the above embodiments, the working principle of the present invention is as follows: The pressure of the valve body pipe fitting 1 is relieved through the safety pressure control structure 2. When the valve body pipe fitting 1 cuts off the conveying pipeline through the valve core body 5, due to the suddenly increased pressure inside the pipeline, a large water hammer effect will be generated at the supply end of the conveying pipeline, which is likely to exceed the bearing pressure of the safety pressure control structure 2, resulting in damage to the conveying pipeline and its safety pressure control structure 2. Through the cooperation of the water hammer pressure relief structure 12 and the safety pressure control structure 2, this water hammer effect can be eliminated; When the valve body pipe fitting 1 connected to the conveying pipeline is in normal operation, the pressure inside the conveying pipeline is relatively small and will not exert pressure on the safety pressure control structure 2. At this time, the stress relief groove 128 is in the water hammer elimination state; When the valve body pipe fitting 1 is cut off by the valve core body 5, the water hammer pressure inside the pressure control pipe fitting 201 is reduced through the stress relief groove 128, and is buffered and released through the safety pressure control structure 2. During the release process, the arc plate 126 reduces the space of the stress relief groove 128, which can reduce the water hammer effect formed by the water flow; The pipe body pressure relief structure 3 can be assembled in multiple numbers to effectively and adaptively buffer and control the pressure inside the conveying pipeline; Regarding the operation mechanism of the safety pressure control structure 2, once the pressure in the conveying pipeline rises, it will directly act on the hydraulic seal plug 205, causing it to move inside the hydraulic pressure relief pipe 202; the movement of the hydraulic seal plug 205 pushes the hydraulic oil 206, which flows through the hydraulic oil pipe 209 into the hydraulic return pipe 210; this process causes the buffer seal plug 211 to rise, and the flow of the hydraulic oil 206 plays a role in buffering the pressure; when the pressure reaches the preset limit value, the hydraulic seal plug 205 will move down to the bottom, and the safety pressure relief pipe 214 will be exposed accordingly. The liquid inside the pipeline is discharged through the arc-shaped groove 1 215 and the safety pressure relief pipe 214 to achieve pressure relief; after the pressure decreases, the return spring 213 pushes the buffer seal plug 211 and the hydraulic oil 206 back to their original positions; Regarding the operation mechanism of the pipe body pressure relief structure 3, the liquid discharged from the safety pressure relief pipe 214 flows into the pressure control pressure relief pipe 301 through the pressure relief inlet pipe 302 and the pressure relief inlet groove 303; due to the pressure inside the pipe, the pressure relief seal plug 304 will overcome the elastic force of the tension spring 306 and descend; when the pressure relief seal plug 304 descends to the position of the pressure relief discharge pipe 315, the liquid is discharged through the arc-shaped groove 2 305 and the pressure relief discharge pipe 315; multiple pipe body pressure relief structures 3 can be connected through the pressure relief inlet pipe 302 and the pressure relief discharge pipe 315 to enhance the pressure relief ability; the remaining liquid inside the pressure control pressure relief pipe 301 flows back to the pressure control pipe fitting 201 through the liquid return pipe 308, the return connection pipe 310, the docking pipe 311 and the return connection pipe 216; the liquid level sensor 313 monitors the liquid level, and once an abnormality is detected, the buzzer 314 will send an alarm signal; Operating mechanism of the water hammer pressure relief structure 12: When the valve body pipe fitting 1 is in the open state, the pressure in the hydraulic return pipe 210 will decrease, causing the buffer seal plug 211 inside it to drive the reset rod 212 to rise during the reset process; the rising of the reset rod 212 causes the first toothed frame 121 to rise; the first toothed frame 121 meshes with the spur gear 122, causing the spur gear 122 to rotate, and then causing the second toothed frame 124 to descend to form the integrity of the pipeline with the pressure control pipe fitting 201; during the closing process of the valve core body 5, the water hammer effect is released through the stress relief groove 128 formed by the rise of the arc plate 126. When the water pressure gradually stabilizes, the pressure inside the pressure control pipe fitting 201 presses on the hydraulic seal plug 205 through the conical groove 203, causing the hydraulic seal plug 205 to push the reset rod 212 on the buffer seal plug 211 to rise through the hydraulic oil 206. The rising reset rod 212 drives the first toothed frame 121 to rise. During the rising process, it meshes with the spur gear 122 to rotate, and then through the spur gear 122 meshing with the second toothed frame 124 to descend. The sealing rod 125 connected to the second toothed frame 124 drives the arc plate 126 to descend in the stress relief groove 128, forming a change in the communication state between the stress relief box 127 and the pressure control pipe fitting 201. This change releases the pressure generated by the water hammer effect, and the effective water hammer effect is buffered and eliminated through the safety pressure control structure 2; Valve control principle: When the operator rotates the handwheel 10, the worm 9 rotates accordingly; the worm 9 meshes with the worm gear 8, causing the worm gear 8 to drive the transmission screw barrel 7 to rotate; the transmission screw barrel 7 drives the transmission screw rod 11 to drive the valve core body 5 to move up and down in the vertical valve pipe 4 through a screw drive method; this process realizes the opening and closing control of the valve body pipe fitting 1, thereby regulating the on-off of the fluid in the pipeline.
[0030] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present invention. Structures, devices, and operation methods not specifically described and explained in the present invention shall be implemented according to conventional means in the art unless otherwise specified and limited.
Claims
1. An adaptive safety pressure control device for a high-temperature and high-pressure valve, characterized in that Including: Valve body pipe fittings; Flange plates are integrally fixed at both ends of the valve body pipe fittings, and a safety pressure control structure for safely controlling the pressure of the conveying pipeline is detachably and sealingly assembled at one end of the valve body pipe fittings through the flange plate; The safety pressure control structure includes a pressure control pipe fitting, and a hydraulic pressure relief pipe is integrally fixed at the bottom of the pressure control pipe fitting. A tapered groove is formed through between the hydraulic pressure relief pipe and the pressure control pipe fitting, and a hydraulic buffer groove is formed inside the hydraulic pressure relief pipe. A hydraulic seal plug is sealingly and movably arranged inside the hydraulic buffer groove; The hydraulic pressure relief pipe and the hydraulic return pipe are connected through a hydraulic oil pipe; The safety pressure control structure is connected with a pipe body pressure relief structure for secondary pressure relief of the conveying pipeline; A water hammer pressure relief structure for eliminating the water hammer effect of the conveying pipeline when the valve body pipe fitting is closed is assembled on the safety pressure control structure.
2. The adaptive safety pressure control device for a high-temperature and high-pressure valve according to claim 1, characterized in that, One side of the hydraulic pressure relief pipe is connected through a safety pressure relief pipe, and a vertical sealing groove is vertically formed on one side of the hydraulic pressure relief pipe where the safety pressure relief pipe is located. A vertical sealing plate fixedly assembled with the hydraulic seal plug is sealingly and movably arranged inside the vertical sealing groove; 3. The adaptive safety pressure control device for a high-temperature and high-pressure valve according to claim 2, characterized in that, A reset rod is integrally fixed at the top of the buffer seal plug, and the reset rod is vertically and sealingly penetrated outside the top end of the hydraulic return pipe. A reset spring sleeved outside the reset rod is arranged between the hydraulic return pipe and the buffer seal plug; An arc-shaped groove 1 is formed on the surface of the hydraulic seal plug corresponding to the specification of the safety pressure relief pipe; 4. An adaptive safety pressure control device for a high-temperature and high-pressure valve according to claim 1, characterized in that, The pipe body pressure relief structure includes a pressure control pressure relief pipe, and a pressure relief inlet pipe detachably and sealingly assembled with the safety pressure relief pipe is connected through one side of the pipe body pressure relief structure. A pressure relief inlet groove is formed on the inner wall of the pressure control pressure relief pipe at the upper end of the pressure relief inlet pipe; Another side of the pressure control pressure relief pipe is connected through a pressure relief discharge pipe, and a closing plate is detachably and sealingly assembled outside the pressure relief discharge pipe; 5. The self - adaptive safety pressure - control device for a high - temperature and high - pressure valve according to claim 4, characterized in that, A pressure relief seal plug is movably and sealingly arranged inside the pressure control pressure relief pipe, a tension spring is assembled between the pressure relief seal plug and the pressure control pressure relief pipe, and a flow limiting air hole is formed at the bottom end of the pressure control pressure relief pipe at the lower end of the tension spring; An arc-shaped groove 2 is formed on the surface of the pressure relief seal plug corresponding to the specification of the pressure relief discharge pipe; 6. The adaptive safety pressure control device for a high-temperature and high-pressure valve according to claim 5, characterized in that, A liquid return pipe is penetrated and arranged at the top end of the pressure control pressure relief pipe, a one-way valve body is assembled between the liquid return pipe and the pressure control pressure relief pipe, a return connection pipe is sealingly and detachably assembled at the top of the liquid return pipe, and a docking pipe is sealingly butted at one end of the return connection pipe away from the liquid return pipe. An assembly pipe is integrally fixed on the docking pipe; A liquid level sensor is assembled on the inner wall of the pressure control pressure relief pipe, and a buzzer arranged outside the pressure control pressure relief pipe is connected to the side of the liquid level sensor; A sealing plate is detachably and sealingly assembled on the docking pipe not assembled with the return connection pipe; 7. An adaptive safety pressure control device for a high-temperature and high-pressure valve according to claim 1, characterized in that, The water hammer pressure relief structure includes a stress elimination box fixedly assembled on the pressure control pipe fitting, and a stress elimination groove is formed through between the stress elimination box and the pressure control pipe fitting; A protective shell is fixedly arranged between the stress elimination box and the hydraulic return pipe; 8. An adaptive safety pressure control device for a high-temperature and high-pressure valve according to claim 7, characterized in that, A toothed frame 1 fixedly assembled with the reset rod is movably arranged inside the protective shell, and the toothed frame 1 meshes with a spur gear rotatably arranged inside the protective shell; On the side of the spur gear away from the first tooth-shaped frame, there is a second tooth-shaped frame engaged with it, and a sealing rod is fixedly arranged on the second tooth-shaped frame. The bottom end of the sealing rod penetrates through the inside of the stress relief box in a sealed manner, and an arc-shaped plate that is fixedly arranged and movably arranged inside the stress relief groove is provided.
9. An adaptive safety pressure control device for a high-temperature and high-pressure valve according to claim 1, characterized in that, In the middle of the valve body pipe fitting, a vertical valve pipe is integrally fixed, and a valve core body is vertically movably arranged inside the vertical valve pipe. The top end of the valve core body is integrally fixed with a transmission screw rod, and a transmission screw barrel is helically driven on the outside of the transmission screw rod.
10. The adaptive safety pressure control device for a high-temperature and high-pressure valve according to claim 9, characterized in that, On the outside of the transmission screw barrel, there is a sealing top shell integrally fixed to the upper end of the valve core body, and the transmission screw barrel is rotatably arranged inside the sealing top shell; On the outer wall of the top end of the transmission screw barrel, a worm gear is fixedly arranged, and the worm gear is engaged with a worm. One end of the worm rotates through the outside of the sealing top shell, and a hand wheel is integrally fixed.