Actuator, quick opening valve and storage fire extinguishing system

Abstract

The invention relates to the technical field of valves with fluid acting on pistons, in particular to an actuator, a quick opening valve and a storage fire extinguishing system. The actuator comprises a barrel, sealing plugs are installed at the two ends of the barrel respectively, a power connector and a pneumatic cavity are formed in the barrel, a composite piston and a transmission rod are arranged in the pneumatic cavity, a backup connector is further formed in the barrel, a backup cavity communicated with the backup connector is formed in the barrel, and a backup piston is installed in the backup cavity. The pneumatic cavity and the backup cavity are distributed in the axial direction of the barrel and are separated through a partition plate arranged in the radial direction of the barrel, a through hole is formed in the partition plate, the two ends of the through hole are communicated with the pneumatic cavity and the backup cavity respectively, and the composite piston and the backup piston are matched with the transmission rod in a pushing mode. According to the actuator, the situation that the quick opening and closing valve cannot be opened and closed is avoided, and the fault-tolerant capability and reliability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of valves in which fluid acts on a piston, and in particular to an actuator, a quick-opening valve and a storage fire protection system. Background Art

[0002] The flammable and explosive storage fire protection system is a safety system specially used to prevent and control fire and explosion accidents of flammable and explosive materials during storage. The pipe interface of the system is usually installed with a quick-opening valve. The quick-opening valve is a valve that can be opened or closed quickly. When a fire occurs, the quick-opening valve can complete the opening action in a very short time, so that the fire extinguishing agent can quickly flow into the fire area, realizing a rapid response to and effective control of the fire. The quick-opening valve is usually equipped with manual control and automatic control. Since manual control requires on-site operation by staff and has limitations, remote control of the quick-opening valve is often achieved through automatic control. The automatic control system of the quick-opening valve mainly includes sensors, controllers and actuators. The sensor can monitor the fire. When the sensor detects a fire, it will immediately send a signal to the controller, and the controller will send a command to the actuator. The actuator receives the command from the controller and drives the quick-opening valve to open or close to realize the inflow of fire extinguishing agent.

[0003] Current actuators often use electric, pneumatic or hydraulic methods to drive the internal components of the actuator to make linear or angular displacement to achieve the opening or closing of quick-opening valves or other fire valves. For example, the Chinese utility model patent with authorization announcement number CN213117690U and authorization announcement date 2021.05.04 discloses a valve buffer pneumatic actuator, which includes a piston rod, a piston, an air pipe, and a cylinder with end covers fixedly installed at both ends. The cylinder and the end covers at both ends form an inflatable inner cavity. The piston is movably installed in the inflatable inner cavity and is sealed and connected to the inflatable inner cavity. One end of the piston rod is fixedly connected to the piston, and the other end extends along the axial direction of the cylinder to pass through one side end cover and be connected to the valve body that needs to be opened and closed. The air pipes are respectively arranged at both ends of the cylinder. The end cover is connected with the inflation cavity, and the piston in the inflation cavity divides the inflation cavity into two independent chambers. The gas pipes on the two end covers are respectively connected with the two independent chambers and gas is introduced into the corresponding chambers, thereby driving the piston and the piston rod; when the valve body needs to be opened, gas is introduced into the gas pipe on the end cover that does not pass through the piston rod, and the piston is lifted by the gas to approach the end cover that passes through the piston rod, and the piston rod moves accordingly to open the valve body connected thereto; when the valve body needs to be closed, the gas flow to the gas pipe on the end cover that does not pass through the piston rod is cut off, and gas is introduced into the gas pipe on the end cover that passes through the piston rod, and the piston is lifted in the reverse direction by the gas to approach the end cover that does not pass through the piston rod, and the piston rod moves in the reverse direction to close the valve body connected thereto.

[0004] In the above scheme, the movement of the piston is controlled by introducing gas into two chambers separated by the piston, thereby realizing the movement of the piston rod. However, the fault tolerance performance of the actuator is poor. Since the gas pipes on the two end covers provide opposite forces to the piston, once one of the gas pipes leaks gas or other internal structure failures occur and it cannot be used, the actuator will not be able to quickly open and close the connected valve body, thereby affecting the efficiency of fire handling and easily causing the disaster to expand and spread. Summary of the invention

[0005] The purpose of the present invention is to provide an actuator, which aims to solve the problem that the quick opening valve cannot be opened and closed quickly when a fault occurs. At the same time, the purpose of the present invention is also to provide a quick opening valve, which is connected to the above-mentioned actuator to solve the problem that the quick opening valve cannot be opened and closed quickly. At the same time, the purpose of the present invention is also to provide a warehouse fire protection system, which uses the above-mentioned actuator to quickly open and close the quick opening valve to solve the problem of the expansion and spread of the disaster.

[0006] To achieve the above purpose, the actuator of the present invention adopts the following technical solutions: The actuator includes a cylinder, with sealing plugs installed at both ends of the cylinder respectively. The cylinder is provided with a power interface and a pneumatic cavity connected to the power interface is provided inside. A composite piston and a transmission rod are provided in the pneumatic cavity. The cylinder is also provided with a backup interface and a backup cavity connected to the backup interface is provided inside. A backup piston is installed in the backup cavity. The pneumatic cavity and the backup cavity are distributed along the axial direction of the cylinder and are separated by a partition arranged along the radial direction of the cylinder. A through hole is provided on the partition. The two ends of the through hole are respectively connected to the pneumatic cavity and the backup cavity. One end of the composite piston is fitted in the pneumatic cavity, and the other end passes through the through hole and extends into the backup cavity. One end of the transmission rod passes through the composite piston and extends into the backup cavity, and the other end passes through the sealing plug connected to the pneumatic cavity for connecting a quick opening valve. The composite piston and the backup piston are all pushed together with the transmission rod.

[0007] Furthermore, a groove is provided on the end face of the backup piston away from the through hole, and a protrusion is provided on the end face of the sealing plug close to the backup piston for cooperating with the groove stopper. When the protrusion cooperates with the groove stopper, a gap exists between the backup piston and the sealing plug, and the gap is connected to the backup interface.

[0008] Furthermore, a placement groove is provided on the end surface of the backup piston close to the through hole, and a receiving hole is provided on the bottom surface of the placement groove opposite to the transmission rod. A buffer is detachably installed in the receiving hole, and the buffer is used to contact the transmission rod and lift the transmission rod.

[0009] Furthermore, the buffer member includes a bump block, which is located in the placement groove, and the diameter of the bump block is less than or equal to the diameter of the transmission rod.

[0010] Furthermore, a stop groove is provided on the end face of the composite piston away from the through hole, a stop matching groove is provided on the end face of the sealing plug close to the composite piston, and a shoulder is provided on the transmission rod which is always located between the stop groove and the stop matching groove, one end face of the shoulder is used for stop matching with the stop groove, and the other end face is used for stop matching with the stop matching groove.

[0011] Furthermore, the end surface of the composite piston close to the through hole is a stepped surface, and an airflow gap exists between the stepped surface and the inner wall of the pneumatic cavity, and the airflow gap is used to communicate with the power interface.

[0012] Furthermore, piston rings are installed on the outer peripheral surface of the composite piston that cooperates with the pneumatic cavity and the inner wall of the through hole.

[0013] Furthermore, a buffer washer is installed in the backup cavity. The buffer washer is located at the end of the moving path of the backup piston. The buffer washer is used to cooperate with the backup piston to stop.

[0014] Beneficial effects: The actuator of the present invention is an improved invention. By introducing a gas driving source such as a high-pressure gas or an electric squib into the power interface, the composite piston can be pushed to move linearly and the transmission rod can be pushed to move linearly, so that the quick opening and closing of the quick-opening valve connected to the transmission rod can be realized. At the same time, a backup interface, a backup chamber and a backup piston are arranged in the cylinder body, and a partition is arranged between the pneumatic chamber and the backup chamber. The pneumatic chamber and the backup chamber can be separated by the partition, so that the pneumatic chamber and the backup chamber are independent of each other. By opening a through hole in the partition, the composite piston passes through the through hole and extends into the backup chamber. At the same time, the end of the transmission rod also extends into the backup chamber after passing through the composite piston, so that the backup piston can contact and push the transmission rod. By introducing a through hole into the backup interface, High-pressure gas or other driving sources such as electric squibs can push the backup piston to move linearly and push the transmission rod to move linearly, and can also realize the rapid opening and closing of the quick-opening valve connected to the transmission rod, that is, there are two sets of execution paths in the actuator, and these two sets of execution paths can each realize the rapid opening and closing of the quick-opening valve. One set of execution paths is used as the commonly used execution path, and the other set of execution paths is used as the backup execution path. When the commonly used execution path fails, the backup execution path can continue to perform normal opening and closing of the quick-opening valve, thereby avoiding the situation where the quick-opening and closing valve cannot be opened and closed when a single set of execution paths fails, thereby improving fault tolerance and reliability.

[0015] The quick opening and closing valve of the present invention adopts the following technical solutions: A quick opening valve comprises an actuator; the actuator comprises a cylinder, both ends of the cylinder are respectively provided with sealing plugs, the cylinder is provided with a power interface and a pneumatic cavity connected to the power interface is provided inside, a composite piston and a transmission rod are provided in the pneumatic cavity, the cylinder is also provided with a backup interface and a backup cavity connected to the backup interface is provided inside, a backup piston is installed in the backup cavity, the pneumatic cavity and the backup cavity are distributed along the axial direction of the cylinder and are separated by a partition arranged along the radial direction of the cylinder, a through hole is provided on the partition, both ends of the through hole are respectively connected to the pneumatic cavity and the backup cavity, one end of the composite piston is fitted in the pneumatic cavity, and the other end passes through the through hole and extends into the backup cavity, one end of the transmission rod passes through the composite piston and extends into the backup cavity, and the other end passes through the sealing plug connected to the pneumatic cavity for connecting the quick opening valve, and the composite piston and the backup piston are all pushed together with the transmission rod.

[0016] Furthermore, a groove is provided on the end face of the backup piston away from the through hole, and a protrusion is provided on the end face of the sealing plug close to the backup piston for cooperating with the groove stopper. When the protrusion cooperates with the groove stopper, a gap exists between the backup piston and the sealing plug, and the gap is connected to the backup interface.

[0017] Furthermore, a placement groove is provided on the end surface of the backup piston close to the through hole, and a receiving hole is provided on the bottom surface of the placement groove opposite to the transmission rod. A buffer is detachably installed in the receiving hole, and the buffer is used to contact the transmission rod and lift the transmission rod.

[0018] Furthermore, the buffer member includes a bump block, which is located in the placement groove, and the diameter of the bump block is less than or equal to the diameter of the transmission rod.

[0019] Furthermore, a stop groove is provided on the end face of the composite piston away from the through hole, a stop matching groove is provided on the end face of the sealing plug close to the composite piston, and a shoulder is provided on the transmission rod which is always located between the stop groove and the stop matching groove, one end face of the shoulder is used for stop matching with the stop groove, and the other end face is used for stop matching with the stop matching groove.

[0020] Furthermore, the end surface of the composite piston close to the through hole is a stepped surface, and an airflow gap exists between the stepped surface and the inner wall of the pneumatic cavity, and the airflow gap is used to communicate with the power interface.

[0021] Furthermore, piston rings are installed on the outer peripheral surface of the composite piston that cooperates with the pneumatic cavity and the inner wall of the through hole.

[0022] Furthermore, a buffer washer is installed in the backup cavity. The buffer washer is located at the end of the moving path of the backup piston. The buffer washer is used to cooperate with the backup piston to stop.

[0023] Beneficial effects: The quick-opening valve of the present invention is an improved invention. By introducing a gas driving source such as a high-pressure gas or an electric squib into the power interface, the composite piston can be pushed to move linearly and the transmission rod can be pushed to move linearly, so that the quick-opening valve connected to the transmission rod can be quickly opened and closed. At the same time, a backup interface, a backup chamber and a backup piston are arranged in the cylinder body, and a partition is arranged between the pneumatic chamber and the backup chamber. The pneumatic chamber and the backup chamber can be separated by the partition, so that the pneumatic chamber and the backup chamber are independent of each other. In addition, by opening a through hole in the partition, the composite piston passes through the through hole and extends into the backup chamber. At the same time, the end of the transmission rod also extends into the backup chamber after passing through the composite piston, so that the backup piston can contact and push the transmission rod. By introducing a through hole into the backup interface, High-pressure gas or other driving sources such as electric squibs can push the backup piston to move linearly and push the transmission rod to move linearly, and can also realize the rapid opening and closing of the quick-opening valve connected to the transmission rod, that is, there are two sets of execution paths in the actuator, and these two sets of execution paths can each realize the rapid opening and closing of the quick-opening valve. One set of execution paths is used as the commonly used execution path, and the other set of execution paths is used as the backup execution path. When the commonly used execution path fails, the backup execution path can continue to perform normal opening and closing of the quick-opening valve, thereby avoiding the situation where the quick-opening and closing valve cannot be opened and closed when a single set of execution paths fails, thereby improving fault tolerance and reliability.

[0024] The storage fire protection system of the present invention adopts the following technical solutions: A warehouse fire protection system includes a quick-opening valve; the quick-opening valve includes an actuator; the actuator includes a cylinder, and sealing plugs are respectively installed at both ends of the cylinder, the cylinder is provided with a power interface and a pneumatic cavity connected to the power interface is provided inside, a composite piston and a transmission rod are provided in the pneumatic cavity, the cylinder is also provided with a backup interface and a backup cavity connected to the backup interface is provided inside, a backup piston is installed in the backup cavity, the pneumatic cavity and the backup cavity are distributed along the axial direction of the cylinder and are separated by a partition arranged along the radial direction of the cylinder, a through hole is provided on the partition, and both ends of the through hole are respectively connected to the pneumatic cavity and the backup cavity, one end of the composite piston is fitted in the pneumatic cavity, and the other end passes through the through hole and extends into the backup cavity, one end of the transmission rod passes through the composite piston and extends into the backup cavity, and the other end passes through the sealing plug connected to the pneumatic cavity for connecting the quick-opening valve, and the composite piston and the backup piston are all pushed together with the transmission rod.

[0025] Furthermore, a groove is provided on the end face of the backup piston away from the through hole, and a protrusion is provided on the end face of the sealing plug close to the backup piston for cooperating with the groove stopper. When the protrusion cooperates with the groove stopper, a gap exists between the backup piston and the sealing plug, and the gap is connected to the backup interface.

[0026] Furthermore, a placement groove is provided on the end surface of the backup piston close to the through hole, and a receiving hole is provided on the bottom surface of the placement groove opposite to the transmission rod. A buffer is detachably installed in the receiving hole, and the buffer is used to contact the transmission rod and lift the transmission rod.

[0027] Furthermore, the buffer member includes a bump block, which is located in the placement groove, and the diameter of the bump block is less than or equal to the diameter of the transmission rod.

[0028] Furthermore, a stop groove is provided on the end face of the composite piston away from the through hole, a stop matching groove is provided on the end face of the sealing plug close to the composite piston, and a shoulder is provided on the transmission rod which is always located between the stop groove and the stop matching groove, one end face of the shoulder is used for stop matching with the stop groove, and the other end face is used for stop matching with the stop matching groove.

[0029] Furthermore, the end surface of the composite piston close to the through hole is a stepped surface, and an airflow gap exists between the stepped surface and the inner wall of the pneumatic cavity, and the airflow gap is used to communicate with the power interface.

[0030] Furthermore, piston rings are installed on the outer peripheral surface of the composite piston that cooperates with the pneumatic cavity and the inner wall of the through hole.

[0031] Furthermore, a buffer washer is installed in the backup cavity. The buffer washer is located at the end of the moving path of the backup piston. The buffer washer is used to cooperate with the backup piston to stop.

[0032] Beneficial effects: The storage fire protection system of the present invention is an improved invention. By introducing a gas driving source such as a high-pressure gas or an electric squib into the power interface, the composite piston can be pushed to move linearly and the transmission rod can be pushed to move linearly, so that the quick opening and closing of the quick-opening valve connected to the transmission rod can be realized. At the same time, a backup interface, a backup chamber and a backup piston are arranged in the cylinder body, and a partition is arranged between the pneumatic chamber and the backup chamber. The pneumatic chamber and the backup chamber can be separated by the partition, so that the pneumatic chamber and the backup chamber are independent of each other. By opening a through hole on the partition, the composite piston passes through the through hole and extends into the backup chamber. At the same time, the end of the transmission rod also extends into the backup chamber after passing through the composite piston, so that the backup piston can contact and push the transmission rod. By introducing high-pressure gas or an electric squib or other driving sources into the backup interface, The source can push the backup piston to move linearly and push the transmission rod to move linearly, and can also realize the rapid opening and closing of the quick-opening valve connected to the transmission rod, that is, there are two groups of execution paths in the actuator, and these two groups of execution paths can each realize the rapid opening and closing of the quick-opening valve, one group of execution paths is used as the commonly used execution path, and the other group of execution paths is used as the backup execution path. When the commonly used execution path fails, the normal opening and closing of the quick-opening valve can continue to be performed through the backup execution path, so as to avoid the situation that the quick-opening and closing valve cannot be opened and closed when a single group of execution paths fails, thereby improving the fault tolerance and reliability, being able to quickly control the fire and prevent the disaster from further expanding and spreading. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of a front cross-sectional structure of an embodiment of an actuator of the present invention; Figure 2 It is a left side cross-sectional structural schematic diagram of an embodiment of an actuator of the present invention; Figure 3 It is a left-side structural schematic diagram of an embodiment of an actuator of the present invention; Figure 4 It is a schematic diagram of the left cross-sectional structure of a backup interface in an embodiment of the actuator of the present invention when working alone; Figure 5 It is a schematic diagram of the left-side cross-sectional structure of a power interface in an embodiment of the actuator of the present invention when working alone.

[0034] In the figure: 1. Cylinder; 2. Sealing plug; 3. Power interface; 4. Pneumatic chamber; 5. Composite piston; 6. Transmission rod; 7. Backup interface; 8. Backup chamber; 9. Backup piston; 10. Partition; 11. Through hole; 12. Groove; 13. Protrusion; 14. Interval; 15. Placement groove; 16. Accommodation hole; 17. Bumper; 18. Insert rod; 19. Stop groove; 20. Stop fitting groove; 21. Shoulder; 22. Airflow gap; 23. Piston ring; 24. Buffer washer; 25. Pressure relief interface; 26. Pipe sleeve; 27. Sealing gasket; 28. Nut; 29. ​​Mounting support; 30. Mounting hole. DETAILED DESCRIPTION

[0035] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0036] The actuator is a driving mechanism that controls the opening and closing of the valve by electric, driving or hydraulic means. Traditional pneumatic actuators usually open and close the valve body by introducing high-pressure gas into a closed chamber, and the high-pressure gas pushes the piston to move back and forth in a straight line, and drives the piston rod to move synchronously. However, there is usually only one set of execution paths inside it. When the execution path fails, the opening and closing of the quick-opening valve cannot be achieved. To avoid this problem, a set of spare execution paths can be set inside the actuator, and the spare execution paths are set in parallel with the commonly used execution paths, so that the two sets of execution paths do not affect each other, and each can achieve normal opening and closing of the quick-opening valve. Based on the above inventive concept, the present invention proposes an actuator, a quick-opening valve and a storage fire protection system. By setting two sets of independent execution paths in parallel in the actuator, when any set of execution paths fails, the other set of execution paths can be used as a spare path to achieve the opening and closing of the quick-opening valve, so that the fire extinguishing agent can flow out quickly and control the fire.

[0037] Embodiments of the actuator of the present invention: See also Figures 1 to 3As a basic embodiment of the present invention, the actuator includes a cylinder 1, and sealing plugs 2 are installed at both ends of the cylinder 1. A power interface 3 is provided on the cylinder 1 and a pneumatic chamber 4 connected to the power interface 3 is provided inside. A composite piston 5 and a transmission rod 6 are provided in the pneumatic chamber 4. By introducing a driving source such as a high-pressure gas or an electric squib into the power interface 3, the composite piston 5 can be pushed to move linearly and the transmission rod 6 can be driven to move linearly, so that the quick opening and closing of the fast opening valve connected to the transmission rod 6 can be realized. A backup interface 7 is also provided on the cylinder 1 and a pneumatic chamber 4 connected to the backup interface 7 is provided inside. The backup chamber 8 has a backup piston 9 installed in it. The pneumatic chamber 4 and the backup chamber 8 are distributed along the axial direction of the cylinder 1 and are separated by a partition 10 arranged radially along the cylinder 1. A through hole 11 is provided on the partition 10. The two ends of the through hole 11 are respectively connected to the pneumatic chamber 4 and the backup chamber 8. One end of the composite piston 5 fits in the pneumatic chamber 4, and the other end passes through the through hole 11 and extends into the backup chamber 8. One end of the transmission rod 6 passes through the hollow cavity of the composite piston 5 and extends into the backup chamber 8, and the other end passes through the sealing plug 2 connected to the pneumatic chamber 4 and is used to connect The quick opening valve, the composite piston 9 and the backup piston 9 are all pushed together with the transmission rod 6. In the present embodiment, when the backup piston 9 is in use, an electric squib can be connected to the backup interface 7. The explosion pressure generated by the electric squib is used as the driving source of the backup piston 9. The explosion pressure will push the backup piston 9 to move linearly and drive the transmission rod 6 to move linearly, and the quick opening and closing of the quick opening valve connected to the transmission rod 6 can also be realized. High-pressure gas or other driving sources can also be introduced into the backup interface 7, and the high-pressure gas or other driving sources can also realize the push of the backup piston 9; that is, there are two groups of execution paths in the actuator, and each of the two groups of execution paths can realize the quick opening and closing of the quick opening valve. One group of execution paths is used as the commonly used execution path, and the other group of execution paths is used as the spare execution path. When the commonly used execution path fails, the normal opening and closing of the quick opening valve can be continued through the spare execution path, so as to avoid the situation that the quick opening and closing valve cannot be opened and closed when a single group of execution paths fails, thereby improving the fault tolerance and reliability, and being able to quickly control the fire and prevent the disaster from further expanding and spreading.

[0038] As a preferred embodiment of the present invention, a groove 12 is provided on the end face of the backup piston 9 away from the through hole 11, and a protrusion 13 for engaging with the groove 12 is provided on the end face of the sealing plug 2 close to the backup piston 9. When the protrusion 13 engages with the groove 12, a gap 14 exists between the backup piston 9 and the sealing plug 2, and the gap 14 is connected to the backup interface 7. Then, when the backup interface 7 is connected to the driving source, the driving source will directly act on the backup piston 9 through the gap 14, so that the backup piston 9 moves linearly in the backup chamber 8. In addition, when the groove 12 on the backup piston 9 is separated from the protrusion 13, Before, the above-mentioned gap 14 is a circular ring, and the volume of the driving source required to push the backup piston 9 is relatively small, that is, the initial driving source can push the backup piston 9 to move in a straight line as long as it fills the circular ring gap 14. If the groove 12 and the protrusion 13 are not set, the gap 14 is cylindrical, and the initial driving source needs to fill the cylindrical gap 14 to lift the backup piston 9. Therefore, the setting of the protrusion 13 and the groove 12 can achieve the initial lifting of the backup piston 9 through a smaller drive, and can enable the backup piston 9 to move in a straight line at the fastest speed, thereby improving the working efficiency of the backup piston 9.

[0039] As a preferred embodiment of the present invention, a placement groove 15 is provided on the end surface of the backup piston 9 close to the through hole 11, and a receiving hole 16 is provided on the bottom surface of the placement groove 15, which is arranged opposite to the transmission rod 6. A buffer can be removably installed in the receiving hole 16, and the buffer is used to contact with the transmission rod 6 and lift the transmission rod 6. The buffer in this embodiment is a wearing part with good elasticity. When the backup interface 7 is connected to the electric squib, the electric squib will generate a large explosion pressure at the moment of power-on, so that the backup piston 9 is quickly pushed to contact with the transmission rod 6. Under the severe impact of the explosion pressure, it is easy to The backup piston 9 and the transmission rod 6 may be collided or damaged, and the buffer can isolate the backup piston 9 from the transmission rod 6, and can buffer the larger impact force on the backup piston 9, and then transmit it to the transmission rod 6 to avoid damage to both. The buffer serves as an insulator between the backup piston 9 and the transmission rod 6, and will be deformed and damaged after multiple collisions. It is set to be detachable for easy replacement. Before each use, it is necessary to check the deformation degree of the buffer and replace it in time to avoid a reduction in the buffering effect and damage to the backup piston 9 and the transmission rod 6.

[0040] As a preferred embodiment of the present invention, the buffer includes a bump block 17, which is located in the placement groove 15, and the diameter of the bump block 17 is less than or equal to the diameter of the transmission rod 6. This arrangement is to ensure that when the backup piston 9 moves in the direction close to the transmission rod 6, the bump block 17 can enter from the hollow cavity of the composite piston 5, thereby ensuring that the bump block 17 can contact the transmission rod 6 and provide support and upward driving force to the transmission rod 6, so that the transmission rod 6 can open the quick opening valve, and the buffer also includes a plug rod 18 inserted into the accommodating hole 16, and the plug rod 18 can be detachably installed in the accommodating hole 16; in this embodiment, the accommodating hole 16 is arranged between the groove 12 and the placement groove 15 and simultaneously connects the groove 12 and the placement groove 15. Such an arrangement allows that when the bump block 17 contacts the transmission rod 6, the plug rod 18 installed in the accommodating hole 16 can also be affected by the explosion pressure introduced by the backup interface 7, so that the driving force provided by the bump block 17 to the transmission rod 6 is more reliable. In other embodiments, the connection between the accommodating hole 16 and the groove 12 may also be cut off, and at this time, the bump block 17 can still support and push the transmission rod 6 .

[0041] As a preferred embodiment of the present invention, a stop groove 19 is provided on the end face of the composite piston 5 away from the through hole 11, a stop matching groove 20 is provided on the end face of the sealing plug 2 close to the composite piston 5, and a shaft shoulder 21 which is always located between the stop groove 19 and the stop matching groove 20 is provided on the transmission rod 6, one end face of the shaft shoulder 21 is used for stop matching with the stop groove 19, and the other end face is used for stop matching with the stop matching groove 20, that is, the maximum linear stroke of the transmission rod 6 is the maximum distance between the stop groove 19 and the stop matching groove 20, no matter whether the composite piston 5 or the backup piston 9 is used to drive the transmission rod 6, as long as the shaft on the transmission rod 6 is ensured The shoulder 21 can move to contact with the stop mating groove 20, which can ensure the normal opening and closing of the quick-opening valve by the transmission rod 6. In addition, the cooperation between the shaft shoulder 21, the stop groove 19 and the stop mating groove 20 can avoid excessive stroke of the transmission rod 6, and ensure that the working stroke of the transmission rod 6 remains consistent each time. In addition, it can also limit the length of the transmission rod 6 extending into the backup chamber 8, and ensure that the initial position of the transmission rod 6 can be suitable for the normal operation of the pneumatic chamber 4 and the backup chamber 8. At the same time, it can also provide guidance for the linear displacement of the transmission rod 6, and avoid the transmission rod 6 from offset during the movement, causing wear of the transmission rod 6, and shortening the service life of the transmission rod 6.

[0042] As a preferred embodiment of the present invention, the end face of the composite piston 5 close to the through hole 11 is a stepped surface, and there is an airflow gap 22 between the stepped surface and the inner wall of the pneumatic chamber 4. The airflow gap 22 is used to communicate with the power interface 3. When the driving source is introduced into the power interface 3, the driving source can directly enter the airflow gap 22, thereby pushing the composite piston 5 and making it move in a straight line, thereby driving the transmission rod 6 to move in a straight line, thereby realizing the rapid opening and closing of the quick opening valve.

[0043] As a preferred embodiment of the present invention, piston rings 23 are installed on the outer peripheral surface of the composite piston 5 that cooperates with the pneumatic chamber 4 and the inner wall of the through hole 11. The piston ring 23 can provide dynamic sealing and guidance for the composite piston 5 during the linear movement of the composite piston 5. The piston ring 23 cooperates with the composite piston 5 to achieve relative isolation of the pneumatic chamber 4 and the backup chamber 8, so that the pneumatic chamber 4 and the backup chamber 8 are independent of each other and do not affect each other.

[0044] As a preferred embodiment of the present invention, a buffer gasket 24 is installed in the backup chamber 8. The buffer gasket 24 is located at the end of the moving path of the backup piston 9. The buffer gasket 24 is used to cooperate with the backup piston 9 to stop. The placement groove 15 of the backup piston 9 is arranged relative to the buffer gasket 24, that is, when the backup piston 9 moves in the direction close to the transmission rod 6, it will contact and cooperate with the buffer gasket 24 to stop. The buffer gasket 24 isolates the backup piston 9 from the inner wall of the backup chamber 8, thereby preventing the backup piston 9 from directly contacting the inner wall of the backup chamber 8 during the movement, causing wear or damage to the backup piston 9.

[0045] As a preferred embodiment of the present invention, a pressure relief interface 25 connected to the backup chamber 8 is also provided on the cylinder 1. In this embodiment, the power interface 3 is fed with high-pressure gas as a driving source, and the backup interface 7 is connected to an electric squib and the explosive pressure generated by the electric squib is used as a driving source. At this time, a pipe joint assembly is connected to both the power interface 3 and the pressure relief interface 25. If the backup interface 7 is also fed with high-pressure gas as a driving source, the backup interface 7 also needs to be connected to a pipe joint assembly. The pipe joint assembly includes a sleeve 26, a sealing gasket 27 and a nut 28. The sleeve 26 is fixedly installed at the power interface 3 and the pressure relief interface 25. The sealing ring is clamped between the sleeve 26 and the power interface 3 and the pressure relief interface 25. The nut 28 is threadedly screwed on the outside of the sleeve 26 and connects the sleeve 26 with the power interface 3 and the pressure relief interface 25 to ensure the sealing of the high-pressure gas flow process. In other embodiments, the sleeve 26 can also be relieved at the power interface 3 and the pressure relief interface 25, as long as the connection reliability of the sleeve 26 with the power interface 3 and the pressure relief interface 25 can be guaranteed.

[0046] As a preferred embodiment of the present invention, a mounting support 29 is fixedly connected to the outer circumference of the cylinder 1, and a mounting hole 30 is opened on the mounting support 29. By installing a fastener into the mounting hole 30, the cylinder 1 can be fixedly connected to the supporting equipment.

[0047] See also Figures 4 to 5The use process of the actuator of the present invention is as follows: when the driving source is introduced into the power interface 3, the driving source enters the airflow gap 22 between the composite piston 5 and the pneumatic chamber 4, and pushes the composite piston 5 to move linearly, and drives the shaft shoulder 21 through the stop groove 19, and then drives the transmission rod 6 to move synchronously with the composite piston 5, until the shaft shoulder 21 enters the stop matching groove 20 and stops with the stop matching groove 20. At this time, the end of the transmission rod 6 connected to the quick-opening valve realizes the opening of the quick-opening valve. When the quick-opening valve needs to be closed, the passage of the driving source is stopped. When the backup piston 9 is inlet, the high-pressure gas in the pneumatic chamber 4 flows out along the power interface 3, and the composite piston 5 is linearly moved in the reverse direction and reset under the action of its own gravity, and the transmission rod 6 is also reset under the action of its own gravity, thereby completing the closing of the quick-opening valve; when the driving source is introduced into the backup interface 7, the driving source will enter the gap 14 between the backup piston 9 and the sealing plug 2, and push the backup piston 9, so that the backup piston 9 drives the buffer to move linearly in the direction close to the transmission rod 6, until the backup piston 9 contacts the buffer gasket 24, and the transmission rod 6 moves to the point where the shaft shoulder 21 is in contact with the buffer gasket 24, and the transmission rod 6 moves to the point where the shaft shoulder 21 is in contact with the sealing plug 2. The stop groove 19 is separated and engaged with the stop matching groove 20, so that the quick opening valve can be opened. When the quick opening valve needs to be closed, the pressure relief interface 25 is opened, and the driving source in the backup chamber 8 flows out from the pressure relief interface 25. At this time, the backup piston 9 will move in the opposite linear direction under its own gravity and reset, and the transmission rod 6 will also reset under the action of its own gravity. The shoulder 21 is separated from the stop matching groove 20 and re-engaged with the stop groove 19, so that the quick opening valve is closed. In specific use, the power interface 3 or the backup interface 7 can be used alone, or the power interface 3 and the backup interface 7 can be driven in parallel at the same time, and the power interface 3 and the backup interface 7 can both be fed with high-pressure gas or connected to the electric bursting tube, or one can be fed with high-pressure gas and the other can be connected to the electric bursting tube. No matter which driving mode is adopted, any one of the driving modes can be used as a backup for another driving mode. When any one of the driving modes fails and cannot realize the normal opening and closing of the quick opening valve, it can be realized by another driving mode. This redundant design can improve the overall fault tolerance and reliability.

[0048] Embodiments of the quick opening valve of the present invention: The quick-opening valve includes the above-mentioned actuator. The quick-opening valve is connected to the above-mentioned actuator through the transmission rod 6, so that the normal opening and closing of the quick-opening valve can be achieved. Even if one of the driving modes fails, it will not affect the normal opening and closing of the quick-opening valve, thereby ensuring the normal operation of the quick-opening valve.

[0049] Embodiments of the storage fire protection system of the present invention: The storage fire protection system includes the above-mentioned quick-opening valve, which is connected to the above-mentioned actuator. By connecting the above-mentioned actuator to the quick-opening valve, the quick opening of the quick-opening valve can be guaranteed. When a fire occurs, the actuator can open the quick-opening valve in the first time, so that the fire extinguishing agent can quickly flow into the fire area, effectively controlling the fire and avoiding the expansion and spread of the disaster.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. An actuator, comprising a cylinder, with sealing plugs installed at both ends of the cylinder, a power interface is provided on the cylinder, and a pneumatic cavity connected to the power interface is provided inside the cylinder, and a composite piston and a transmission rod are provided in the pneumatic cavity, characterized in that: The cylinder is also provided with a backup interface and a backup cavity connected to the backup interface. A backup piston is installed in the backup cavity. The pneumatic cavity and the backup cavity are distributed along the axial direction of the cylinder and are separated by a partition arranged along the radial direction of the cylinder. A through hole is opened on the partition. The two ends of the through hole are respectively connected to the pneumatic cavity and the backup cavity. One end of the composite piston is fitted in the pneumatic cavity, and the other end passes through the through hole and extends into the backup cavity. One end of the transmission rod passes through the composite piston and extends into the backup cavity, and the other end passes through a sealing plug connected to the pneumatic cavity for connecting a quick opening valve. The composite piston and the backup piston are all pushed together with the transmission rod.

2. The actuator according to claim 1, characterized in that: The end face of the backup piston away from the through hole is provided with a groove, and the end face of the sealing plug close to the backup piston is provided with a protrusion for cooperating with the groove stopper. When the protrusion cooperates with the groove stopper, there is a gap between the backup piston and the sealing plug, and the gap is connected to the backup interface.

3. The actuator according to claim 2, characterized in that: The backup piston has a placement groove on its end surface close to the through hole, and a receiving hole opposite to the transmission rod is provided on its bottom surface. A buffer is detachably installed in the receiving hole, and the buffer is used to contact the transmission rod and lift the transmission rod.

4. The actuator according to claim 3, characterized in that: The buffer member comprises a bump block, which is located in the placement groove, and the diameter of the bump block is less than or equal to the diameter of the transmission rod.

5. The actuator according to claim 1, characterized in that: A stop groove is provided on the end surface of the composite piston away from the through hole, a stop matching groove is provided on the end surface of the sealing plug close to the composite piston, and a shaft shoulder is provided on the transmission rod, which is always located between the stop groove and the stop matching groove, one end surface of the shaft shoulder is used for stop matching with the stop groove, and the other end surface is used for stop matching with the stop matching groove.

6. The actuator according to claim 5, characterized in that: The end surface of the composite piston close to the through hole is a stepped surface, and there is an airflow gap between the stepped surface and the inner wall of the pneumatic cavity, and the airflow gap is used to communicate with the power interface.

7. The actuator according to claim 6, characterized in that: The outer peripheral surface of the composite piston that matches the pneumatic cavity and the inner wall of the through hole are both equipped with piston rings.

8. The actuator according to claim 1, characterized in that: A buffer washer is installed in the backup cavity. The buffer washer is located at the end of the moving path of the backup piston. The buffer washer is used to cooperate with the backup piston to stop.

9. Quick opening valve, characterized in that: An actuator comprising any one of claims 1 to 8.

10. Warehouse fire protection system, characterized by: Includes the quick opening valve as described in claim 9.

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