An emergency discharge safety valve with pneumatic drive for non-set pressure

Abstract

This invention relates to the field of pneumatic emission safety valve technology, and discloses an emergency emission safety valve with pneumatic drive and non-set pressure. The valve includes a valve body, an air inlet pipe fixedly installed at the bottom of the inner wall of the valve body, a valve disc fixedly installed at the top of the outer wall of the air inlet pipe, a valve stem fixedly installed at the top of the outer wall of the valve disc, a spring sleeved on the outer wall of the valve stem, and an adjusting nut rotatably installed at the top of the outer wall of the valve stem. When air pressure continuously enters the air inlet pipe, it generates a thrust on the thrust frame, causing the rotating rod to rotate. When the air pressure is too low, the rotating frame rotates, losing its restraint on the thrust frame and generating a thrust on the guide plate, guiding the airflow and generating a certain thrust on the airflow. When the airflow flows over the surface of the contact plate, the flow cross-section gradually narrows, increasing the gas flow velocity and generating a thrust on the gas. This can accelerate the airflow in advance and improve its flow state when in contact with the contact plate, effectively preventing pressure accumulation, avoiding the risk of stagnation, and improving the overall safety of the system.

Description

Technical Field

[0001] This invention relates to the field of pneumatic discharge safety valve technology, specifically to an emergency discharge safety valve with pneumatic drive and non-set pressure. Background Technology

[0002] The pneumatically driven automatic emergency discharge safety valve is a special valve that combines a pneumatic actuator with a safety pressure relief function. It is mainly used to automatically and quickly discharge the medium in case of system overpressure or emergency to prevent equipment damage or accidents. It integrates the mechanical response mechanism of traditional safety valves with the remote / automatic control capability of pneumatic systems. In some cases, a fire detector, temperature sensor, or pressure transmitter malfunctions and sends a false alarm signal to the control system, causing the PLC to erroneously activate the pneumatic actuator. When the air pressure is insufficient, the valve disc is forced open by the pneumatic actuator, preventing the air pressure from being effectively released and causing it to remain inside the safety valve. The trapped moisture or corrosive media (such as steam or acidic gases) will come into contact with the metal parts inside the valve for a long time, causing rust, pitting, or stress corrosion cracking, thus reducing the valve's lifespan. To address these issues, the following solutions are proposed. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides an emergency discharge safety valve with pneumatic drive for non-set pressure operation, including a valve body, an air inlet pipe fixedly disposed at the bottom of the inner wall of the valve body, a valve disc fixedly disposed at the top of the outer wall of the air inlet pipe, a valve stem fixedly disposed at the top of the outer wall of the valve disc, a spring sleeved on the outer wall of the valve stem, and an adjusting nut rotatably disposed at the top of the outer wall of the valve stem, and further comprising: The braking mechanism is slidably installed on the inner wall of the intake pipe; The braking mechanism includes a thrust frame that is slidably disposed on the inner wall of the intake pipe; The compression mechanism is rotatably mounted on the bottom of the outer wall of the valve disc; The compression mechanism includes a rotating frame that is rotatably disposed at the bottom of the inner wall of the valve disc; The rotating mechanism is fixedly installed on the outer wall of the braking mechanism.

[0004] Preferably, the braking mechanism includes: The force application component is slidably disposed on the inner wall of the intake pipe; Passive component, the passive component is fixedly installed on the outer wall of the force-applying component; As air pressure continuously enters the intake pipe and exerts a thrust on the valve disc, the force-applying component moves under the impact of the air pressure, generating a thrust on the passive component.

[0005] Preferably, the compression mechanism includes: A limiting component is provided, which is located at the bottom of the outer wall of the valve disc; Speed ​​increaser assembly, which is rotatably mounted on the inner wall of the intake manifold; As the force-applying component moves continuously, it comes into contact with the limiting component and exerts a thrust on the limiting component.

[0006] Preferably, the rotating mechanism includes: Energy storage component, which is fixedly installed on the outer wall of the passive component; As the energy storage components move continuously, they gradually accumulate potential energy.

[0007] Preferably, the force-applying component includes a limiting block fixedly connected to the top of the outer wall of the thrust frame; The air pressure exerts a thrust on the thrust frame, causing the thrust frame to move, and the limit block moves accordingly.

[0008] Preferably, the passive component includes a telescopic plate fixedly connected to the side wall of the thrust frame, a rotating rod rotatably connected to the inner wall of the intake pipe, and a guide plate rotatably connected to the outer wall of the rotating rod. During the continuous movement of the thrust frame, a thrust is generated on the telescopic plate, and when the limiting block moves along with it, it comes into contact with the guide plate and generates a thrust on the guide plate.

[0009] Preferably, the limiting component includes a torsion spring fitted onto the inner wall of the rotating frame; As the push frame continues to move, the rotating frame rotates under the push of the push frame. When the push frame stops moving, the rotating frame completes its constraint on the push frame.

[0010] Preferably, the speed-increasing component includes a contact plate rotatably connected to the inner wall of the intake pipe, and a torsion spring is sleeved on the inner wall of the contact plate; When the rotating frame rotates, it loses its restriction on the thrust frame. During the reset process, the limiting block generates a thrust on the guide plate. During the rotation, the guide plate guides the airflow through its own arc surface and generates a certain thrust on the airflow, which increases the gas flow speed. When the thrust frame initially moves, it generates a thrust on the contact plate. As the thrust frame continues to move, it always generates a thrust on the contact plate. However, when the air pressure is insufficient, the contact plate will lose the thrust of the thrust frame and rotate under the elastic force of the torsion spring.

[0011] Preferably, the power storage component includes a second torsion spring sleeved on the inner wall of the guide plate, several fixing blocks fixedly connected to the outer wall of the rotating rod, and a third torsion spring sleeved on the inner wall of the rotating rod. During the initial movement of the thrust frame and the limiting block, a thrust is generated on the guide plate, causing the air pressure to be resisted by the guide plate. At this time, when the guide plate is impacted by the air pressure, the guide plate rotates relative to the rotating rod. When the first limiting block contacts the guide plate, the guide plate rotates as the thrust frame moves. When the first limiting block leaves the contacting guide plate, the air pressure generates a thrust on the guide plate at the bottom of the rotating rod. Under the impact of the air pressure, the guide plate is forced to drive the rotating rod to rotate. The torsion spring three continuously accumulates potential energy under the rotation of the rotating rod.

[0012] The present invention has the following beneficial effects: (1) When the air pressure continuously enters the air intake pipe, the present invention generates a thrust on the thrust frame, causing the guide plate to drive the rotating rod to rotate. When the thrust frame stops moving, the rotating frame completes the restriction on the thrust frame. When the air pressure is too low, the rotating frame rotates and loses the restriction on the thrust frame, causing the thrust frame to drive several limit blocks to reset synchronously, generating a thrust on the guide plate, guiding the airflow and generating a certain thrust on the airflow, so that when the airflow flows through the surface of the contact plate, the flow cross section of the airflow gradually narrows, increasing the flow speed of the gas. By generating a thrust on the gas through the above components, the airflow can be accelerated in advance and its flow state when in contact with the contact plate can be improved, effectively preventing pressure accumulation, avoiding the risk of stagnation, and improving the overall safety of the system.

[0013] (2) When the thrust frame initially moves, the contact plate rotates under force. During the rotation, pressure is generated on the torsion spring. As the thrust frame continues to move, it always generates a thrust on the contact plate, making the contact plate unable to rotate. Thus, during normal depressurization, the contact plate cannot change the flow rate of the gas inside the intake pipe. When the gas pressure is insufficient, the contact plate will lose the thrust of the thrust frame and rotate under the elastic force of the torsion spring. Through the above components, during normal exhaust, the contact plate is in a compressed state, so that the contact plate cannot guide the gas, allowing the gas to pass through at a normal flow rate, thus enhancing the protection of the valve.

[0014] (3) During the initial movement of the thrust frame and the limiting block, the present invention generates a thrust on the guide plate, causing the guide plate to rotate synchronously with the rotating rod. During the rotation, the guide plate is exactly opposite to the direction of air pressure flow, so that the air pressure will be resisted by the guide plate. At this time, when the guide plate is impacted by the air pressure, the guide plate rotates relative to the rotating rod. During the rotation, pressure is generated on the second torsion spring, causing the second torsion spring to be compressed and accumulate potential energy. The second torsion spring has a small elastic force. When the air pressure impacts the surface of the guide plate, the guide plate can be rotated instantly, reducing the resistance to the air pressure. Through the above components, the guide plate can automatically tilt with the airflow, which can avoid rigid obstruction, allow the airflow to pass smoothly, greatly reduce the local throttling effect and energy loss, and improve the system efficiency.

[0015] (4) When the first limiting block contacts the guide plate, the guide plate rotates as the thrust frame moves. When the first limiting block leaves the contacting guide plate, the air pressure generates a thrust on the guide plate at the bottom of the rotating rod. Due to the presence of the fixed block, the guide plate will not rotate relative to the rotating rod under the impact of air pressure. Under the impact of air pressure, the guide plate is forced to drive the rotating rod to rotate. The torsion spring three accumulates potential energy under the rotation of the rotating rod. When the thrust frame stops moving, the torsion spring three has accumulated a large amount of potential energy under the rotation of the rotating rod. By increasing the number of rotations of the guide plate through the above components and realizing intermittent rotation, the controllability of the gas thrust and the system energy efficiency can be significantly improved. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the overall structure of the present invention; Figure 4 This is a schematic cross-sectional view of part of the structure of the present invention; Figure 5 This is a schematic cross-sectional view of the braking mechanism of the present invention; Figure 6 This is a schematic diagram of some parts in the force-applying assembly of the present invention; Figure 7 This is a schematic cross-sectional view of the limiting component of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle; Figure 9 This is a schematic diagram showing the thrust frame and the rotating frame just in contact in this invention; Figure 10 This is a schematic diagram of the thrust frame and the rotating frame after they come into contact. Figure 11 This is a schematic cross-sectional view of the speed-up component of the present invention; Figure 12 This is a schematic cross-sectional view of the energy storage component of the present invention; Figure 13 This is a cross-sectional schematic diagram of the rotating mechanism of the present invention.

[0018] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Braking mechanism; 11. Force application component; 12. Passive component; 13. Valve housing; 14. Intake pipe; 15. Valve disc; 16. Valve stem; 17. Spring; 18. Adjusting nut; 111. Thrust frame; 112. Limiting block; 121. Telescopic plate; 122. Rotating rod; 123. Guide plate; 2. Compression mechanism; 21. Limiting component; 22. Speed-increasing component; 211. Rotating frame; 212. Torsion spring; 221. Contact plate; 222. Torsion spring one; 3. Rotation mechanism; 31. Power storage component; 311. Torsion spring two; 312. Fixing block; 313. Torsion spring three. Detailed Implementation

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

[0020] Example 1, please refer to Figures 1-8 This invention relates to an emergency discharge safety valve with pneumatic drive for non-set pressure operation, comprising a valve body 13, an air inlet pipe 14 fixedly disposed at the bottom of the inner wall of the valve body 13, a valve disc 15 fixedly disposed at the top of the outer wall of the air inlet pipe 14, a valve stem 16 fixedly disposed at the top of the outer wall of the valve disc 15, a spring 17 sleeved on the outer wall of the valve stem 16, and an adjusting nut 18 rotatably disposed at the top of the outer wall of the valve stem 16, and further comprising: Braking mechanism 1 is slidably disposed on the inner wall of the air intake pipe 14; The braking mechanism 1 includes a thrust frame 111 that is slidably disposed on the inner wall of the intake pipe 14; Compression mechanism 2 is rotatably mounted on the bottom of the outer wall of valve disc 15; The compression mechanism 2 includes a rotating frame 211 that is rotatably disposed at the bottom of the inner wall of the valve disc 15; Rotating mechanism 3 is fixedly installed on the outer wall of braking mechanism 1.

[0021] Braking mechanism 1 includes: Force application component 11 is slidably disposed on the inner wall of the air intake pipe 14; Passive component 12 is fixedly installed on the outer wall of force application component 11; The operator adjusts the nut 18 to determine the compression of the spring 17. As air pressure continuously enters the intake pipe 14, it pushes the valve disc 15. When the air pressure reaches a certain value, the valve disc 15 is opened by the air pressure. When the valve disc 15 is opened, it drives the valve stem 16 to move upward, causing the valve stem 16 to push the spring 17, thus compressing the spring 17. When the air pressure gradually returns to a stable value, the spring 17 applies a thrust to the valve stem 16, causing the valve disc 15 to compress. Under the thrust of 16, the air intake pipe 14 is sealed. When the external detection device of valve housing 13 sends a signal, the pneumatic actuator is activated and the valve disc 15 is forcibly opened, so that the air pressure inside the air intake pipe 14 can also be discharged. When the air pressure continuously enters the air intake pipe 14 and generates thrust on the valve disc 15, the force application component 11 moves under the impact of the air pressure. When the force application component 11 moves, it generates thrust on the passive component 12, causing the passive component 12 to move under the force.

[0022] Compression mechanism 2 includes: Restriction component 21 is rotatably disposed at the bottom of the outer wall of valve disc 15; Speed ​​increase component 22 is rotatably disposed on the inner wall of intake pipe 14; As the force-applying component 11 moves continuously, it first comes into contact with the speed-increasing component 22, generating a thrust on the speed-increasing component 22 and forcing the speed-increasing component 22 to rotate. Then it comes into contact with the limiting component 21 and generates a thrust on the limiting component 21, causing the limiting component 21 to rotate under force.

[0023] Rotating mechanism 3 includes: Energy storage component 31 is fixedly installed on the outer wall of passive component 12; When the passive component 12 moves, the energy storage component 31 moves along with it, and gradually accumulates potential energy as the energy storage component 31 moves.

[0024] Example 2, please refer to Figures 5-11 The present invention is an emergency discharge safety valve with pneumatic drive when the pressure is not set. Based on Example 1, the force application component 11 includes a limiting block 112 fixedly connected to the top of the outer wall of the thrust frame 111. As air pressure continuously enters the air intake pipe 14 and exerts a thrust on the valve disc 15, the air pressure exerts a thrust on the thrust frame 111, causing the thrust frame 111 to move under the impact of the air pressure, while the limiting block 112 moves synchronously with the thrust frame 111.

[0025] The passive component 12 includes a telescopic plate 121 fixedly connected to the side wall of the thrust frame 111, a rotating rod 122 rotatably connected to the inner wall of the air intake pipe 14, and a guide plate 123 rotatably connected to the outer wall of the rotating rod 122. During the continuous movement of the thrust frame 111, a thrust is generated on the telescopic plate 121, causing the telescopic plate 121 to be compressed. When the limiting block 112 moves along with it, it comes into contact with the guide plate 123. As the limiting block 112 continues to move, a thrust is generated on the guide plate 123, causing the guide plate 123 to drive the rotating rod 122 to rotate.

[0026] The limiting component 21 includes a torsion spring 212 sleeved on the inner wall of the rotating frame 211; As the push frame 111 continues to move, it generates a pushing force on the contact plate 221, forcing the contact plate 221 to rotate under force, and applying pressure to the torsion spring 222, causing the torsion spring 222 to be compressed. When the contact plate 221 rotates by a certain angle under force, the push frame 111 slides over the surface of the contact plate 221, such as... Figure 9 and Figure 10 As shown, when the thrust frame 111 is about to stop moving, the inclined surface of the thrust frame 111 contacts the bottom of the outer wall of the rotating frame 211. Under the thrust of the thrust frame 111, the rotating frame 211 rotates, applying pressure to the torsion spring 212 during rotation, causing the torsion spring 212 to be compressed and accumulate potential energy. When the thrust frame 111 stops moving, the rotating frame 211 completes the restriction on the thrust frame 111. In addition, during normal depressurization, the air pressure applies a thrust to the valve disc 15 and also applies a thrust to the thrust frame 111, making it impossible for the thrust frame 111 to reset during normal depressurization.

[0027] The speed-increasing component 22 includes a contact plate 221 rotatably connected to the inner wall of the intake pipe 14, and a torsion spring 222 is sleeved on the inner wall of the contact plate 221. When the air pressure is too low, valve disc 15 is forcibly opened by the pneumatic actuator, causing the air pressure inside the intake pipe 14 to continuously leak out. At this time, the air pressure cannot apply sufficient thrust to the thrust frame 111. When valve disc 15 moves upward, it drives the rotating frame 211 to move upward synchronously, causing the rotating frame 211 to apply tension to the contact end of the thrust frame 111. This causes the rotating frame 211 to rotate under force and apply pressure to the torsion spring 212. When the rotating frame 211 rotates, it loses its pressure on the thrust frame 111. The limitation of 1 causes the thrust frame 111 to gradually reset under its own weight, and the thrust frame 111 is still subjected to a small thrust of air pressure during the reset, so the reset of the thrust frame 111 is not instantaneous. When the thrust frame 111 resets, it drives several limiting blocks 112 to reset synchronously. During the reset process, the limiting blocks 112 generate a thrust on the guide plate 123, forcing the guide plate 123 to rotate. During the rotation, the guide plate 123 guides the airflow through its own arc surface and generates a certain thrust on the airflow. Since the contact plate 221 is in an inclined state at this time, the airflow cross section gradually narrows when the airflow flows over the surface of the contact plate 221. At the same time, under the guidance of the guide plate 123, the airflow velocity is increased. When the thrust frame 111 initially moves, the end near the contact plate 221 will contact the contact plate 221 and generate a thrust on the contact plate 221, causing the contact plate 221 to rotate under force. During the rotation, pressure is generated on the torsion spring 222, forcing the torsion spring 222 to rotate. Spring 222 is compressed and accumulates potential energy. As the thrust frame 111 continues to move, it always exerts a thrust on the contact plate 221, preventing the contact plate 221 from rotating. During normal depressurization, the thrust frame 111 is always restricted by the rotating frame 211. Therefore, during normal depressurization, the contact plate 221 cannot change the flow rate of the gas inside the intake pipe 14. When the air pressure is insufficient, the contact plate 221 loses the thrust of the thrust frame 111 and rotates under the elastic force of the torsion spring 222.

[0028] The power storage assembly 31 includes a second torsion spring 311 sleeved on the inner wall of the guide plate 123, a number of fixing blocks 312 fixedly connected to the outer wall of the rotating rod 122, and a third torsion spring 313 sleeved on the inner wall of the rotating rod 122. During the initial movement of the thrust frame 111 and the limiting block 112, a thrust is generated on the guide plate 123, causing the guide plate 123 to rotate synchronously with the rotating rod 122. During this rotation, the guide plate 123 is directly opposite to the direction of air pressure flow, resulting in resistance to the air pressure. Furthermore, when the guide plate 123 is impacted by air pressure, it rotates relative to the rotating rod 122, exerting pressure on the torsion spring 311 during this rotation. The air pressure compresses and accumulates potential energy. Since the spring force of the second torsion spring 311 is relatively small, the guide plate 123 can rotate instantaneously when impacted by air pressure, reducing resistance to the air pressure. Because the contact surface between the thrust frame 111 and the air pressure is inclined, the thrust frame 111 does not move instantaneously during the impact. Furthermore, the several limiting blocks 112 are spaced at equal intervals. When the first limiting block 112 contacts the guide plate 123, the guide plate 123 rotates as the thrust frame 111 moves. When the first limiting block 112 leaves the contacting guide plate 123, the air pressure exerts a thrust on the guide plate 123 at the bottom of the rotating rod 122. Due to the presence of the fixing block 312, the guide plate 123 will not rotate relative to the rotating rod 122 under the impact of air pressure. Moreover, under the impact of air pressure, the guide plate 123 is forced to drive the rotating rod 122 to rotate. The torsion spring 313 continuously accumulates potential energy under the rotation of the rotating rod 122. When the thrust frame 111 stops moving, the torsion spring 313 is in the rotating rod 122. With the rotation of rod 2, a large amount of potential energy has been accumulated. The limiting block 112, which is initially far away from the end of the rotating rod 122, comes into contact with the guide plate 123 when it finally stops, thus restricting the guide plate 123 and preventing it from rotating prematurely under the elastic potential energy of the torsion spring 313. When the thrust frame 111 stops moving, the air pressure flows through the inclined surface of the thrust frame 111 to the top of the rotating rod 122, preventing the air pressure from generating a thrust on the guide plate 123 at the bottom of the rotating rod 122 again, thus creating resistance to the air pressure.

[0029] A specific application of this embodiment is as follows: the operator determines the compression of the spring 17 by adjusting the nut 18. As air pressure continuously enters the intake pipe 14, it generates a thrust on the valve disc 15. When the air pressure reaches a certain value, the valve disc 15 is opened by the air pressure. When the valve disc 15 is opened, it drives the valve stem 16 to move upward, so that the valve stem 16 generates a thrust on the spring 17, thereby compressing the spring 17. When the air pressure gradually returns to a stable value, the spring 17 applies a thrust to the valve stem 16, so that the valve disc 15 completes the sealing of the intake pipe 14 under the thrust of the valve stem 16. When the external detection device of the valve housing 13 sends a signal, the pneumatic actuator is activated, and the valve disc 15 is forcibly opened, so that the air pressure inside the intake pipe 14 can also be discharged.

[0030] In cases where fire detectors, temperature sensors, or pressure transmitters malfunction and send false alarm signals to the control system, causing the PLC to erroneously activate the pneumatic actuator, valve disc 15 is forced open pneumatically when air pressure is insufficient. This prevents effective air pressure discharge, causing it to accumulate inside valve housing 13. The trapped moisture or corrosive media (such as steam or acidic gases) will remain in contact with the internal metal components of valve housing 13 for an extended period, leading to rust, pitting, or stress corrosion cracking, thus reducing valve life. As air pressure continuously enters the inlet pipe 14 and exerts a thrust on valve disc 15, the excessive air pressure velocity creates a thrust on thrust frame 111, causing it to move under the impact of air pressure. Meanwhile, limit block 1... 12 moves synchronously with the thrust frame 111. During the continuous movement of the thrust frame 111, it generates a thrust on the telescopic plate 121, causing the telescopic plate 121 to be compressed. As the limiting block 112 moves along with it, it contacts the guide plate 123. With the continuous movement of the limiting block 112, it generates a thrust on the guide plate 123, causing the guide plate 123 to drive the rotating rod 122 to rotate. With the continuous movement of the thrust frame 111, it generates a thrust on the contact plate 221, forcing the contact plate 221 to rotate and applying pressure to the torsion spring 222, causing the torsion spring 222 to be compressed. When the contact plate 221 rotates at a certain angle, the thrust frame 111 slides across the surface of the contact plate 221. Figure 9 and Figure 10 As shown, when the thrust frame 111 is about to stop moving, the inclined surface of the thrust frame 111 contacts the bottom of the outer wall of the rotating frame 211. Under the thrust of the thrust frame 111, the rotating frame 211 rotates, applying pressure to the torsion spring 212 during rotation, causing the torsion spring 212 to be compressed and accumulate potential energy. When the thrust frame 111 stops moving, the rotating frame 211 completes the restriction on the thrust frame 111. During normal depressurization, the air pressure applies a thrust to the valve disc 15 and also applies a thrust to the thrust frame 111, making it impossible for the thrust frame 111 to reset during normal depressurization. When the air pressure is too low, the valve disc 15 is forcibly opened by the pneumatic actuator, causing the air pressure inside the intake pipe 14 to continuously leak out. At this time, the air pressure cannot apply sufficient thrust to the thrust frame 111. Figure 10As shown, when the valve disc 15 moves upward, it drives the rotating frame 211 to move upward synchronously, causing the rotating frame 211 to apply a pulling force to the contact end of the thrust frame 111. This causes the rotating frame 211 to rotate under force and apply pressure to the torsion spring 212. When the rotating frame 211 rotates, it loses its restraint on the thrust frame 111, allowing the thrust frame 111 to gradually reset under its own weight. Even during the reset process, the thrust frame 111 is still subjected to a small thrust from the air pressure, ensuring that the reset is not instantaneous. Furthermore, the reset of the thrust frame 111 causes several limiting blocks 112 to reset synchronously. During the reset process, the limiting blocks 112 exert a thrust on the guide plate 123. The guide plate 123 is forced to rotate. During the rotation, the guide plate 123 guides the airflow through its own arc surface and generates a certain thrust on the airflow. Since the contact plate 221 is in an inclined state at this time, the flow cross section of the airflow gradually narrows when the airflow flows over the surface of the contact plate 221. At the same time, under the guidance of the guide plate 123, the flow speed of the gas is increased. By generating thrust on the gas through the above components, the airflow can be accelerated in advance and its flow state when in contact with the contact plate 221 can be improved, resulting in a more stable pressure build-up, enhancing the emergency response capability of the safety valve, effectively preventing pressure accumulation, avoiding the risk of stagnation, and improving the overall safety of the system.

[0031] The number of the above components is not limited. Those skilled in the art can set it freely according to actual needs, as long as the above components are installed at the corresponding component connection positions.

[0032] Utilizing the movement characteristics of the thrust frame 111, during the initial movement of the thrust frame 111, the end near the contact plate 221 will contact the contact plate 221 and generate a thrust on the contact plate 221, causing the contact plate 221 to rotate under the force. During the rotation, pressure is generated on the torsion spring 222, forcing the torsion spring 222 to be compressed and accumulating potential energy. As the thrust frame 111 continues to move, it continuously generates a thrust on the contact plate 221, preventing the contact plate 221 from rotating. Furthermore, during normal depressurization, the thrust frame 111 is always restricted by the rotating frame 211. Therefore, during normal depressurization, the contact plate 221 cannot change the flow rate of the gas inside the intake pipe 14, while the pressure... When the pressure is insufficient, the contact plate 221 will lose the thrust of the thrust frame 111 and rotate under the elastic force of the torsion spring 222. Due to the presence of the contact plate 221, the gas release speed during normal venting will be higher than the normal venting speed, causing the valve inlet pressure to drop sharply while the distal end maintains high pressure, forming periodic pressure fluctuations. This causes the valve disc 15 to reciprocate at high frequency when it is disengaged from the valve seat. The chattering phenomenon will accelerate metal fatigue and, in severe cases, damage the valve structure. Through the above components, during normal venting, the contact plate 221 is in a compressed state, so that the contact plate 221 cannot guide the gas, allowing the gas to pass through at a normal flow rate and enhancing the protection of the valve.

[0033] Utilizing the characteristics of the movement of the thrust frame 111, during the initial movement of the thrust frame 111 and the limiting block 112, a thrust is generated on the guide plate 123, causing the guide plate 123 to be driven by the force to rotate the rotating rod 122 synchronously. During the rotation, the guide plate 123 is exactly opposite to the direction of air pressure flow, so the air pressure will be resisted by the guide plate 123. At this time, when the guide plate 123 is impacted by air pressure, the guide plate 123 rotates relative to the rotating rod 122. During the rotation, pressure is generated on the second torsion spring 311, causing the second torsion spring 311 to be compressed and accumulate potential energy. Moreover, the elastic force of the second torsion spring 311 is small, and the air pressure impacts the surface of the guide plate 123. When the airflow is applied, the guide vane 123 can rotate instantly under force, reducing resistance to air pressure. As the air pressure enters the intake pipe 14 and contacts the valve disc 15, it generates a thrust on the thrust frame 111. During the movement of the thrust frame 111, the guide vane 123 rotates. When the guide vane 123 rotates, it will generate resistance to the gas, causing a local increase in pressure in the intake side channel. This may cause the actual pressure upstream of the valve disc 15 to be higher than the set value, resulting in the safety valve opening prematurely or the action pressure drifting. Through the above components, the guide vane 123 can automatically tilt with the airflow, avoiding rigid obstruction, allowing the airflow to pass smoothly, greatly reducing the local throttling effect and energy loss, and improving system efficiency.

[0034] Utilizing the aforementioned characteristic of air pressure contacting the thrust frame 111, and because the contact surface between the thrust frame 111 and the air pressure is inclined, the thrust frame 111 will not move instantaneously upon impact. Furthermore, the several limiting blocks 112 are spaced at equal intervals. When the first limiting block 112 contacts the guide plate 123, the guide plate 123 rotates as the thrust frame 111 moves. When the first limiting block 112 leaves the contacting guide plate 123, the air... The pressure exerts a thrust on the guide plate 123 at the bottom of the rotating rod 122. Due to the presence of the fixed block 312, the guide plate 123 will not rotate relative to the rotating rod 122 under the impact of air pressure. Furthermore, the air pressure forces the guide plate 123 to drive the rotating rod 122 to rotate. The torsion spring 313 continuously accumulates potential energy under the rotation of the rotating rod 122. When the thrust frame 111 stops moving, the torsion spring 313, under the rotation of the rotating rod 122, has accumulated potential energy. Having accumulated a large amount of potential energy, the limiting block 112, initially located away from the rotating rod 122, contacts the guide plate 123 when it finally stops, restricting the guide plate 123 and preventing it from rotating prematurely under the elastic potential energy of the torsion spring 313. When the thrust frame 111 stops moving, the air pressure flows through the inclined surface of the thrust frame 111 to the top of the rotating rod 122, preventing the air pressure from generating thrust on the guide plate 123 at the bottom of the rotating rod 122 again, thus creating resistance to the air pressure. Because the number of rotations of the guide plate 123 is too small, the thrust effect on the gas will be limited to a single reciprocating motion, making it impossible to form a continuous and stable airflow output. When the gas with a low flow rate comes into contact with the guide plate 123, it is still subject to the resistance of the guide plate 123 and cannot effectively contact the inclined plate surface. By increasing the number of rotations of the guide plate 123 through the above components and realizing intermittent rotation, the controllability of the gas thrust and the system energy efficiency can be significantly improved.

[0035] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A pneumatically driven emergency discharge safety valve for non-set pressure operation, comprising a valve body (13), wherein an air inlet pipe (14) is fixedly disposed at the bottom of the inner wall of the valve body (13), a valve disc (15) is fixedly disposed at the top of the outer wall of the air inlet pipe (14), a valve stem (16) is fixedly disposed at the top of the outer wall of the valve disc (15), a spring (17) is sleeved on the outer wall of the valve stem (16), and an adjusting nut (18) is rotatably disposed at the top of the outer wall of the valve stem (16), characterized in that, Also includes: Braking mechanism (1), the braking mechanism (1) is slidably disposed on the inner wall of the air intake pipe (14); The braking mechanism (1) includes a thrust frame (111) that is slidably disposed on the inner wall of the air intake pipe (14). Compression mechanism (2), which is rotatably disposed at the bottom of the outer wall of valve disc (15); The compression mechanism (2) includes a rotating frame (211) that is rotatably disposed at the bottom of the inner wall of the valve disc (15). Rotating mechanism (3), which is fixedly installed on the outer wall of braking mechanism (1); The braking mechanism (1) includes: Force application component (11), which is slidably disposed on the inner wall of the air intake pipe (14); Passive component (12), which is fixedly disposed on the outer wall of force-applying component (11); As air pressure continuously enters the air intake pipe (14) and exerts a thrust on the valve disc (15), the force application component (11) moves under the impact of the air pressure. The force application component (11) includes a limiting block (112) fixedly connected to the top of the outer wall of the thrust frame (111). Among them, the limiting blocks (112) are equidistant from each other; The passive component (12) includes a telescopic plate (121) fixedly connected to the side wall of the thrust frame (111), a rotating rod (122) rotatably connected to the inner wall of the air intake pipe (14), and a guide plate (123) rotatably connected to the outer wall of the rotating rod (122). The telescopic plate (121) has no elastic potential energy, and the other end of the telescopic plate (121) connected to the thrust frame (111) is fixedly connected to the inner wall of the air intake pipe (14).

2. The emergency discharge safety valve with pneumatic drive and non-set pressure as described in claim 1, characterized in that: The compression mechanism (2) includes: A limiting component (21) is rotatably disposed at the bottom of the outer wall of the valve disc (15); Speed-increasing component (22), which is rotatably disposed on the inner wall of the intake pipe (14); As the force-applying component (11) moves continuously, it generates a thrust on the speed-increasing component (22).

3. The emergency discharge safety valve with pneumatic drive and non-set pressure as described in claim 2, characterized in that: The rotating mechanism (3) includes: Energy storage component (31), which is fixedly installed on the outer wall of passive component (12); When the passive component (12) moves, the energy storage component (31) moves accordingly.

4. The emergency discharge safety valve with pneumatic drive and non-set pressure as described in claim 3, characterized in that: The limiting component (21) includes a torsion spring (212) sleeved on the inner wall of the rotating frame (211). The two ends of the outer wall of the torsion spring (212) are fixedly connected to the bottom of the outer wall of the valve disc (15), and the torsion spring (212) acts on the inner wall of the rotating frame (211).

5. The emergency discharge safety valve with pneumatic drive and non-set pressure as described in claim 3, characterized in that: The speed-increasing component (22) includes a contact plate (221) rotatably connected to the inner wall of the intake pipe (14), and a torsion spring (222) is sleeved on the inner wall of the contact plate (221). The outer ends of the torsion spring (222) are fixedly connected to the inner wall of the air intake pipe (14), and the torsion spring (222) acts on the inner wall of the contact plate (221).

6. The emergency discharge safety valve with pneumatic drive and non-set pressure as described in claim 4, characterized in that: The power storage component (31) includes a second torsion spring (311) sleeved on the inner wall of the guide plate (123), a number of fixing blocks (312) are fixedly connected to the outer wall of the rotating rod (122), and a third torsion spring (313) is sleeved on the inner wall of the rotating rod (122). Among them, the two ends of the outer wall of the second torsion spring (311) are fixedly connected to the outer wall of the rotating rod (122), the side wall of the fixed block (312) is in contact with the surface of the guide plate (123), and the two ends of the outer wall of the third torsion spring (313) are fixedly connected to the inner wall of the air intake pipe (14).

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