Actuator, quick-opening valve and warehousing fire protection system

Abstract

The present application relates to the technical field of valve with fluid acting on piston, especially relates to an actuator, a quick opening valve and a warehouse fire extinguishing system. The actuator comprises a cylinder body, sealing plugs are respectively arranged at two ends of the cylinder body, a power interface and a pneumatic cavity are arranged on the cylinder body, a composite piston and a transmission rod are arranged in the pneumatic cavity, a backup interface is further arranged on the cylinder body and a backup cavity is arranged in the cylinder body and communicated with the backup interface, a backup piston is arranged in the backup cavity, the pneumatic cavity and the backup cavity are distributed along the axial direction of the cylinder body and are separated by a partition plate arranged along the radial direction of the cylinder body, a through hole is arranged on the partition plate and communicated with the pneumatic cavity and the backup cavity, and the composite piston and the backup piston are in a top push fit with the transmission rod. The actuator avoids the situation that the quick opening and closing valve cannot be opened and closed, and improves the fault tolerance and reliability.

Description

Technical Field

[0001] This invention relates to the technical field of valves in which fluid acts on a piston, and more particularly to an actuator, a quick-opening valve, and a warehouse fire protection system. Background Technology

[0002] A flammable and explosive storage fire protection system is a safety system specifically designed to prevent and control fires and explosions of flammable and explosive materials during storage. The system typically has quick-opening valves installed at its pipe connections. These valves open or close rapidly. In the event of a fire, the quick-opening valve opens in a very short time, allowing the extinguishing agent to quickly flow into the fire area, enabling a rapid response and effective control. Quick-opening valves are usually equipped with both manual and automatic control modes. Since manual control requires on-site operation and has limitations, automatic control is often used to remotely control the quick-opening valve. The automatic control system of the quick-opening valve mainly includes sensors, a controller, and actuators. The sensors monitor for fires. When a fire is detected, the sensor immediately sends a signal to the controller, which then sends a command to the actuator. The actuator receives the command from the controller and drives the quick-opening valve to open or close, allowing the extinguishing agent to flow in.

[0003] Current actuators commonly employ electric, pneumatic, or hydraulic methods to drive internal components to perform linear or angular displacement, thereby achieving the opening or closing of fast-opening valves or other fire-fighting valves. For example, Chinese utility model patent CN213117690U, with authorization announcement date of May 4, 2021, discloses a valve buffer pneumatic actuator. This pneumatic actuator includes a piston rod, a piston, an air supply pipe, and a cylinder with end caps fixedly installed at both ends. The cylinder and the end caps at both ends form an inflatable inner cavity. The piston is movably installed in the inflatable inner cavity and is sealed 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 end cap and connect to the valve body that needs to be opened or closed. The air supply pipes are respectively located at both ends of the cylinder. The piston in the inflation chamber divides the inflation chamber into two independent chambers. The gas supply pipes on the two end caps are connected to the two independent chambers and introduce gas into the corresponding chambers, thereby driving the piston and piston rod. When the valve body needs to be opened, gas is introduced into the gas supply pipe on the end cap that does not pass through the piston rod. The piston is pushed up by the gas and moves towards the end cap that passes through the piston rod. The piston rod moves accordingly and opens the valve body connected to it. When the valve body needs to be closed, the gas flow to the gas supply pipe on the end cap that does not pass through the piston rod is cut off, and gas is introduced into the gas supply pipe on the end cap that passes through the piston rod. The piston is pushed up in the opposite direction by the gas and moves towards the end cap that does not pass through the piston rod. The piston rod moves in the opposite direction and closes the valve body connected to it.

[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 of this actuator is poor. Since the gas supply pipes on the two end caps exert opposite forces on the piston, once one of the gas supply pipes leaks gas or the internal structure fails and cannot be used, the actuator cannot quickly open and close the connected valve body, thus affecting the efficiency of fire handling and easily leading to the expansion and spread of the disaster. Summary of the Invention

[0005] The purpose of this invention is to provide an actuator that addresses the problem of the inability to quickly open and close a quick-opening valve in the event of a malfunction. Furthermore, this invention aims to provide a quick-opening valve that, when connected to the aforementioned actuator, solves the problem of the quick-opening valve's inability to open and close quickly. Additionally, this invention aims to provide a warehouse fire protection system that uses the aforementioned actuator to quickly control the opening and closing of the quick-opening valve, thereby preventing the escalation and spread of disasters.

[0006] To achieve the above objectives, the actuator of the present invention adopts the following technical solution:

[0007] The actuator includes a cylinder with sealing plugs installed at both ends. The cylinder has a power interface and an internal pneumatic chamber communicating with the power interface. The pneumatic chamber contains a compound piston and a transmission rod. The cylinder also has a backup interface and an internal backup chamber communicating with the backup interface. A backup piston is installed in the backup chamber. The pneumatic chamber and the backup chamber are distributed along the axial direction of the cylinder and are separated by a partition arranged radially along the cylinder. The partition has a through hole, and the two ends of the through hole communicate with the pneumatic chamber and the backup chamber, respectively. One end of the compound piston fits into the pneumatic chamber, and the other end passes through the through hole and extends into the backup chamber. One end of the transmission rod passes through the compound piston and extends into the backup chamber, and the other end passes through the sealing plug connected to the pneumatic chamber for connecting a quick-opening valve. The compound piston, the backup piston, and the transmission rod are all in a push-fit configuration.

[0008] Furthermore, 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 near the backup piston is provided with a protrusion for engaging with the groove. When the protrusion engages with the groove, there is a gap between the backup piston and the sealing plug, and this gap is connected to the backup interface.

[0009] Furthermore, a placement groove is provided on the end face of the backup piston near the through hole, and a receiving hole is provided on the bottom surface of the placement groove, which is directly 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.

[0010] Furthermore, the buffer includes a stop block located in a placement groove, the diameter of which is less than or equal to the diameter of the transmission rod.

[0011] Furthermore, the composite piston has a stop groove on the end face away from the through hole, and a stop fitting groove on the end face of the sealing plug near the composite piston. The transmission rod has a shoulder that is always located between the stop groove and the stop fitting groove. One end face of the shoulder is used to stop the stop groove, and the other end face is used to stop the stop fitting groove.

[0012] Furthermore, the end face of the composite piston near 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. This airflow gap is used to communicate with the power interface.

[0013] Furthermore, piston rings are installed on the outer peripheral surface of the composite piston that mates with the pneumatic cavity and on the inner wall of the through hole.

[0014] Furthermore, a buffer washer is installed inside the backup cavity. The buffer washer is located at the end of the movement path of the backup piston and is used to stop the backup piston.

[0015] Beneficial Effects: The actuator of this invention is an improved invention. By introducing high-pressure gas or an electric detonator into the power interface, a compound piston can be driven to move linearly, which in turn drives the transmission rod to move linearly. This enables the rapid opening and closing of the quick-opening valve connected to the transmission rod. Simultaneously, a backup interface, a backup chamber, and a backup piston are provided within the cylinder. A partition is installed between the pneumatic chamber and the backup chamber, separating them and making them independent. Furthermore, a through hole is provided in the partition, allowing the compound piston to pass through and extend into the backup chamber. Simultaneously, the end of the transmission rod passes through the compound piston and extends into the backup chamber, allowing the backup piston to contact and push against the transmission rod. By introducing high-pressure gas or an electric detonator into the backup interface... High-pressure gas or other driving sources such as electric detonators can drive the backup piston to move linearly and drive the transmission rod to move linearly. It 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 each of these two sets of execution paths can realize the rapid opening and closing of the quick-opening valve. One set of execution paths is used as the main execution path, and the other set of execution paths is used as the backup execution path. When the main execution path fails, the normal opening and closing of the quick-opening valve can continue through the backup execution path, avoiding the situation where the quick-opening valve cannot be opened or closed when a single set of execution paths fails, thus improving fault tolerance and reliability.

[0016] The quick-opening and closing valve of the present invention adopts the following technical solution:

[0017] A quick-opening valve includes an actuator; the actuator includes a cylinder with sealing plugs installed at both ends. The cylinder has a power interface and an internal pneumatic chamber communicating with the power interface. The pneumatic chamber contains a compound piston and a transmission rod. The cylinder also has a backup interface and an internal backup chamber communicating with the backup interface. A backup piston is installed in the backup chamber. The pneumatic chamber and the backup chamber are distributed along the axial direction of the cylinder and are separated by a partition arranged radially along the cylinder. The partition has a through hole, and both ends of the through hole communicate with the pneumatic chamber and the backup chamber, respectively. One end of the compound piston fits into the pneumatic chamber, and the other end passes through the through hole and extends into the backup chamber. One end of the transmission rod passes through the compound piston and extends into the backup chamber, and the other end passes through the sealing plug connected to the pneumatic chamber to connect to the quick-opening valve. The compound piston, the backup piston, and the transmission rod are all in a push-fit configuration.

[0018] Furthermore, 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 near the backup piston is provided with a protrusion for engaging with the groove. When the protrusion engages with the groove, there is a gap between the backup piston and the sealing plug, and this gap is connected to the backup interface.

[0019] Furthermore, a placement groove is provided on the end face of the backup piston near the through hole, and a receiving hole is provided on the bottom surface of the placement groove, which is directly 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.

[0020] Furthermore, the buffer includes a stop block located in a placement groove, the diameter of which is less than or equal to the diameter of the transmission rod.

[0021] Furthermore, the composite piston has a stop groove on the end face away from the through hole, and a stop fitting groove on the end face of the sealing plug near the composite piston. The transmission rod has a shoulder that is always located between the stop groove and the stop fitting groove. One end face of the shoulder is used to stop the stop groove, and the other end face is used to stop the stop fitting groove.

[0022] Furthermore, the end face of the composite piston near 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. This airflow gap is used to communicate with the power interface.

[0023] Furthermore, piston rings are installed on the outer peripheral surface of the composite piston that mates with the pneumatic cavity and on the inner wall of the through hole.

[0024] Furthermore, a buffer washer is installed inside the backup cavity. The buffer washer is located at the end of the movement path of the backup piston and is used to stop the backup piston.

[0025] Beneficial Effects: The quick-opening valve of this invention is an improved invention. By introducing high-pressure gas or an electric detonator into the power interface, a compound piston can be driven to move linearly, which in turn drives a transmission rod to move linearly, thus achieving rapid opening and closing of the quick-opening valve connected to the transmission rod. Simultaneously, a backup interface, a backup chamber, and a backup piston are provided within the cylinder. A partition is installed between the pneumatic chamber and the backup chamber, separating them and making them independent. Furthermore, a through hole is provided in the partition, allowing the compound piston to pass through and extend into the backup chamber. Simultaneously, the end of the transmission rod passes through the compound piston and also extends into the backup chamber, enabling the backup piston to contact and push against the transmission rod. By introducing high-pressure gas or an electric detonator into the backup interface... High-pressure gas or other driving sources such as electric detonators can drive the backup piston to move linearly and drive the transmission rod to move linearly. It 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 each of these two sets of execution paths can realize the rapid opening and closing of the quick-opening valve. One set of execution paths is used as the main execution path, and the other set of execution paths is used as the backup execution path. When the main execution path fails, the normal opening and closing of the quick-opening valve can continue through the backup execution path, avoiding the situation where the quick-opening valve cannot be opened or closed when a single set of execution paths fails, thus improving fault tolerance and reliability.

[0026] The warehouse fire protection system of the present invention adopts the following technical solution:

[0027] A warehouse fire protection system includes a quick-opening valve; the quick-opening valve includes an actuator; the actuator includes a cylinder with sealing plugs installed at both ends; the cylinder has a power interface and an internal pneumatic chamber communicating with the power interface; the pneumatic chamber contains a compound piston and a transmission rod; the cylinder also has a backup interface and an internal backup chamber communicating with the backup interface; a backup piston is installed in the backup chamber; the pneumatic chamber and the backup chamber are distributed along the axial direction of the cylinder and are separated by a partition arranged radially along the cylinder; the partition has a through hole, the two ends of which communicate with the pneumatic chamber and the backup chamber respectively; one end of the compound piston fits into the pneumatic chamber, and the other end passes through the through hole and extends into the backup chamber; one end of the transmission rod passes through the compound piston and extends into the backup chamber, and the other end passes through the sealing plug connected to the pneumatic chamber to connect to the quick-opening valve; the compound piston, the backup piston, and the transmission rod are all in a push-pull engagement.

[0028] Furthermore, 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 near the backup piston is provided with a protrusion for engaging with the groove. When the protrusion engages with the groove, there is a gap between the backup piston and the sealing plug, and this gap is connected to the backup interface.

[0029] Furthermore, a placement groove is provided on the end face of the backup piston near the through hole, and a receiving hole is provided on the bottom surface of the placement groove, which is directly 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.

[0030] Furthermore, the buffer includes a stop block located in a placement groove, the diameter of which is less than or equal to the diameter of the transmission rod.

[0031] Furthermore, the composite piston has a stop groove on the end face away from the through hole, and a stop fitting groove on the end face of the sealing plug near the composite piston. The transmission rod has a shoulder that is always located between the stop groove and the stop fitting groove. One end face of the shoulder is used to stop the stop groove, and the other end face is used to stop the stop fitting groove.

[0032] Furthermore, the end face of the composite piston near 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. This airflow gap is used to communicate with the power interface.

[0033] Furthermore, piston rings are installed on the outer peripheral surface of the composite piston that mates with the pneumatic cavity and on the inner wall of the through hole.

[0034] Furthermore, a buffer washer is installed inside the backup cavity. The buffer washer is located at the end of the movement path of the backup piston and is used to stop the backup piston.

[0035] Beneficial Effects: The warehouse fire protection system of this invention is an improved invention. By introducing high-pressure gas or an electric detonator into the power interface, a compound piston can be driven to move linearly, which in turn drives a transmission rod to move linearly. This enables the rapid opening and closing of the quick-opening valve connected to the transmission rod. Simultaneously, a backup interface, a backup chamber, and a backup piston are provided within the cylinder. A partition is installed between the pneumatic chamber and the backup chamber, separating them and making them independent. Furthermore, a through hole is made in the partition, allowing the compound piston to pass through and extend into the backup chamber. Simultaneously, the end of the transmission rod passes through the compound piston and extends into the backup chamber, allowing the backup piston to contact and push against the transmission rod. Introducing high-pressure gas or an electric detonator into the backup interface... The actuator can drive a backup piston to move linearly and push the transmission rod to move linearly, and can also quickly open and close the quick-opening valve connected to the transmission rod. That is, there are two sets of execution paths in the actuator, and each of these two sets of execution paths can quickly open and close the quick-opening valve. One set of execution paths is the main execution path, and the other set is the backup execution path. When the main execution path fails, the backup execution path can continue to perform normal opening and closing of the quick-opening valve. This avoids the situation where the quick-opening valve cannot be opened or closed when a single set of execution paths fails, thus improving fault tolerance and reliability. It can quickly control the fire and prevent the disaster from further expanding and spreading. Attached Figure Description

[0036] Figure 1 This is a schematic front cross-sectional view of an embodiment of the actuator of the present invention;

[0037] Figure 2 This is a schematic diagram of the left cross-sectional structure of an embodiment of the actuator of the present invention;

[0038] Figure 3 This is a schematic diagram of the left-side structure of an embodiment of the actuator of the present invention;

[0039] Figure 4 This is a schematic diagram of the left cross-sectional structure of the backup interface when it is working alone in one embodiment of the actuator of the present invention.

[0040] Figure 5 This is a left-side cross-sectional view of the power interface in one embodiment of the actuator of the present invention when it is working alone.

[0041] In the diagram: 1. Cylinder; 2. Sealing plug; 3. Power interface; 4. Pneumatic chamber; 5. Compound piston; 6. Transmission rod; 7. Backup interface; 8. Backup chamber; 9. Backup piston; 10. Partition; 11. Through hole; 12. Groove; 13. Protrusion; 14. Spacing; 15. Placement slot; 16. Accommodation hole; 17. Collision block; 18. Insertion rod; 19. Stop groove; 20. Stop fitting groove; 21. Shoulder; 22. Airflow gap; 23. Piston ring; 24. Buffer washer; 25. Pressure relief interface; 26. Sleeve; 27. Sealing gasket; 28. Nut; 29. ​​Mounting support; 30. Mounting hole. Detailed Implementation

[0042] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0043] An actuator is a drive mechanism that controls the opening and closing of a valve through electric, driven, or hydraulic means. Traditional pneumatic actuators typically open and close the valve body by introducing high-pressure gas into a sealed chamber, which pushes a piston to move linearly back and forth, and drives the piston rod to move synchronously. However, they usually only have one set of actuation paths. When this actuation path fails, the quick-opening valve cannot be opened or closed. To avoid this problem, a backup actuation path can be set up inside the actuator and connected in parallel with the commonly used actuation path. The two sets of actuation paths do not affect each other and can each achieve normal opening and closing of the quick-opening valve. Based on the above inventive concept, this invention proposes an actuator, a quick-opening valve, and a warehouse fire protection system. By setting up two independent actuation paths in parallel within the actuator, when either actuation path fails, the other actuation path can serve as a backup path to achieve the opening and closing of the quick-opening valve, thereby allowing the extinguishing agent to flow out rapidly and control the fire.

[0044] Embodiments of the actuator of the present invention:

[0045] See Figures 1 to 3As a basic embodiment of the present invention, the actuator includes a cylinder 1, with sealing plugs 2 installed at both ends of the cylinder 1. The cylinder 1 has a power interface 3 and an internal pneumatic chamber 4 communicating with the power interface 3. The pneumatic chamber 4 contains a compound piston 5 and a transmission rod 6. By introducing high-pressure gas or an electric detonator into the power interface 3, the compound piston 5 can be pushed to move linearly, thereby driving the transmission rod 6 to move linearly, thus achieving rapid opening and closing of the quick-opening valve connected to the transmission rod 6. The cylinder 1 also has a backup interface 7 and an internal opening communicating with the backup interface 7. Backup chamber 8, in which backup piston 9 is installed. Pneumatic chamber 4 and backup chamber 8 are distributed along the axial direction of cylinder 1 and separated by a partition 10 arranged radially along cylinder 1. The partition 10 has a through hole 11, the two ends of which are connected to pneumatic chamber 4 and backup chamber 8 respectively. One end of compound piston 5 is fitted into pneumatic chamber 4, and the other end passes through the through hole 11 and extends into backup chamber 8. One end of transmission rod 6 passes through the hollow cavity of compound piston 5 and extends into backup chamber 8, and the other end passes through the sealing plug 2 connected to pneumatic chamber 4 and is used for connection. The quick-opening valve, compound piston 9, and backup piston 9 are all push-fitted with transmission rod 6. In this embodiment, when in use, the backup piston 9 can be connected to an electric detonator at the backup interface 7. The explosion pressure generated by the energized electric detonator serves as the driving source for 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, thus enabling the rapid opening and closing of the quick-opening valve connected to the transmission rod 6. Alternatively, high-pressure gas or other driving sources can be introduced into the backup interface 7, which can also push the backup piston 9. That is, there are two sets of execution paths in the actuator, and each of these two sets of execution paths can achieve the rapid opening and closing of the quick-opening valve. One set of execution paths is used as the primary execution path, and the other set of execution paths is used as the backup execution path. When the primary execution path fails, the backup execution path can continue to perform the normal opening and closing of the quick-opening valve, avoiding the situation where the quick-opening valve cannot be opened or closed when a single set of execution paths fails. This improves fault tolerance and reliability, enabling rapid control of the fire and preventing further expansion and spread of the disaster.

[0046] In 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 is provided on the end face of the sealing plug 2 near the backup piston 9 for a stop engagement with the groove 12. When the protrusion 13 is in stop engagement with the groove 12, there is a gap 14 between the backup piston 9 and the sealing plug 2. This gap 14 is connected to the backup interface 7. When the backup interface 7 is connected to the drive source, the drive source will directly act on the backup piston 9 through the gap 14, causing the backup piston 9 to move linearly within the backup cavity 8. In addition, when the groove 12 and the protrusion 13 on the backup piston 9 separate... Previously, the aforementioned interval 14 was annular, and the drive source required to push the backup piston 9 was relatively small. That is, the initial drive source only needed to fill the annular interval 14 to push the backup piston 9 to move linearly. If the groove 12 and protrusion 13 were not provided, the interval 14 would be cylindrical, and the initial drive source would need to fill the cylindrical interval 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 with a smaller drive, and enable the backup piston 9 to move linearly at the fastest speed, thereby improving the working efficiency of the backup piston 9.

[0047] In a preferred embodiment of the present invention, a placement groove 15 is provided on the end face of the backup piston 9 near the through hole 11. The bottom surface of the placement groove 15 is provided with a receiving hole 16 directly opposite the transmission rod 6. A buffer member is detachably installed in the receiving hole 16. The buffer member is used to contact the transmission rod 6 and lift it up. In this embodiment, the buffer member is a vulnerable part with good elasticity. When the backup interface 7 is connected to the electric detonator, the electric detonator generates a large explosion pressure at the moment of energization, thereby rapidly pushing the backup piston 9 to contact the transmission rod 6. Under the violent impact of the explosion pressure, it is easily... The impact could cause collisions or damage to both the backup piston 9 and the transmission rod 6. The buffer can isolate the backup piston 9 and the transmission rod 6 and cushion the large impact force on the backup piston 9 before transmitting it to the transmission rod 6, thus preventing damage to both. However, as the barrier between the backup piston 9 and the transmission rod 6, the buffer can deform and be damaged after repeated collisions. The reason for making it detachable is to facilitate replacement. Before each use, the degree of deformation of the buffer should be checked and it should be replaced in time to avoid a decrease in the buffering effect and damage to the backup piston 9 and the transmission rod 6.

[0048] In a preferred embodiment of the present invention, the buffer includes a contact block 17 located within the placement groove 15. The diameter of the contact block 17 is less than or equal to the diameter of the transmission rod 6. This arrangement ensures that when the backup piston 9 moves towards the transmission rod 6, the contact block 17 can enter from the hollow cavity of the composite piston 5, thereby ensuring that the contact block 17 can contact the transmission rod 6 and provide support and upward pushing force to the transmission rod 6, enabling the transmission rod 6 to open the quick-opening valve. The buffer also includes a matching rod 18 inserted into the receiving hole 16. The matching rod 18 is detachably installed in the receiving hole 16. In this embodiment, the receiving hole 16 is located between the groove 12 and the placement groove 15 and simultaneously connects the groove 12 and the placement groove 15. This arrangement allows the matching rod 18 installed in the receiving hole 16 to also be subjected to the burst pressure introduced by the backup interface 7 when the contact block 17 contacts the transmission rod 6, thereby making the pushing force provided by the contact block 17 to the transmission rod 6 more reliable. In other embodiments, the connection between the receiving hole 16 and the groove 12 can also be cut off. In this case, the contact block 17 can still support and push the transmission rod 6.

[0049] In a preferred embodiment of the present invention, the end face of the composite piston 5 away from the through hole 11 is provided with a stop groove 19, and the end face of the sealing plug 2 near the composite piston 5 is provided with a stop fitting groove 20. The transmission rod 6 is provided with a shoulder 21 that is always located between the stop groove 19 and the stop fitting groove 20. One end face of the shoulder 21 is used to stop the stop groove 19, and the other end face is used to stop the stop 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 fitting groove 20. Regardless of 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 kept within the specified range, the transmission rod 6 can be driven as long as the stop groove 19 and the stop fitting groove 20 are kept within the specified range. Shoulder 21 can move to contact the stop groove 20, which ensures the normal opening and closing of the quick-opening valve by the transmission rod 6. In addition, the cooperation between shoulder 21, stop groove 19 and stop groove 20 can prevent the transmission rod 6 from having an excessive stroke, ensuring that the working stroke of the transmission rod 6 is consistent each time. In addition, it can also limit the length of the transmission rod 6 extending into the backup chamber 8, ensuring that the initial position of the transmission rod 6 can be suitable for the normal operation of both the pneumatic chamber 4 and the backup chamber 8. At the same time, it can also guide the linear displacement of the transmission rod 6, preventing the transmission rod 6 from deviating during movement, causing wear on the transmission rod 6 and shortening its service life.

[0050] In a preferred embodiment of the present invention, the end face of the composite piston 5 near 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 cavity 4. The airflow gap 22 is used to communicate with the power interface 3. When a drive source is introduced into the power interface 3, the drive source can directly enter the airflow gap 22, thereby pushing the composite piston 5 and making it move linearly, thereby driving the transmission rod 6 to move linearly, realizing the rapid opening and closing of the quick-opening valve.

[0051] In a preferred embodiment of the present invention, piston rings 23 are installed on the outer peripheral surface of the composite piston 5 that mates with the pneumatic cavity 4 and on the inner wall of the through hole 11. The piston rings 23 can provide dynamic sealing and guidance for the composite piston 5 during linear movement. The piston rings 23 and the composite piston 5 can achieve relative isolation between the pneumatic cavity 4 and the backup cavity 8, so that the pneumatic cavity 4 and the backup cavity 8 are independent of each other and do not affect each other.

[0052] In a preferred embodiment of the present invention, a buffer washer 24 is installed in the backup cavity 8. The buffer washer 24 is located at the end of the movement path of the backup piston 9. The buffer washer 24 is used to stop the backup piston 9. The placement groove 15 of the backup piston 9 is arranged opposite to the buffer washer 24. That is, when the backup piston 9 moves towards the transmission rod 6, it will contact the buffer washer 24 and stop the buffer washer 24. The buffer washer 24 isolates the backup piston 9 from the inner wall of the backup cavity 8, so as to prevent the backup piston 9 from directly contacting the inner wall of the backup cavity 8 during the movement, which would cause wear or damage to the backup piston 9.

[0053] In a preferred embodiment of the present invention, a pressure relief port 25 communicating with the backup chamber 8 is also provided on the cylinder 1. In this embodiment, high-pressure gas is introduced into the power port 3 as a driving source, and the backup port 7 is connected to an electric detonating tube, using the explosion pressure generated by the electric detonating tube as a driving source. At this time, pipe fitting assemblies are connected to both the power port 3 and the pressure relief port 25. If high-pressure gas is also introduced into the backup port 7 as a driving source, a pipe fitting assembly also needs to be connected to the backup port 7. The pipe fitting assembly includes a pipe sleeve 26, a sealing gasket 27, and a nut 28. The pipe sleeve 26 is fixedly installed at the power port 3 and the pressure relief port 25. The sealing ring is clamped between the pipe sleeve 26 and the power port 3 and the pressure relief port 25. The nut 28 is threaded onto the outside of the pipe sleeve 26, forming a connection between the pipe sleeve 26 and the power port 3 and the pressure relief port 25, ensuring the sealing of the high-pressure gas flow process. In other embodiments, the pipe sleeve 26 can also be located at the power port 3 and the pressure relief port 25, as long as the reliability of the connection between the pipe sleeve 26 and the power port 3 and the pressure relief port 25 can be guaranteed.

[0054] In a preferred embodiment of the present invention, a mounting support 29 is fixedly connected to the outer circumferential surface of the cylinder 1. The mounting support 29 has a mounting hole 30. The cylinder 1 and the supporting equipment can be fixedly connected by inserting fasteners into the mounting hole 30.

[0055] See Figures 4 to 5The actuator of this invention is used as follows: When a drive source is supplied to the power interface 3, the drive source enters the airflow gap 22 between the compound piston 5 and the pneumatic chamber 4, and pushes the compound piston 5 to move linearly. This drives the shoulder 21 through the stop groove 19, which in turn drives the transmission rod 6 to move synchronously with the compound piston 5 until the shoulder 21 enters the stop groove 20 and engages with it. At this time, the end of the transmission rod 6 connected to the quick-opening valve opens the quick-opening valve. When it is necessary to close the quick-opening valve, the supply of the drive source is stopped. When the high-pressure gas in the pneumatic chamber 4 flows out along the power interface 3, the compound piston 5 moves back to its original position under its own gravity, and the transmission rod 6 also resets under its own gravity, thus completing the closure of the quick-opening valve. When the drive source is introduced into the backup interface 7, the drive source enters the gap 14 between the backup piston 9 and the sealing plug 2, and pushes the backup piston 9, causing the backup piston 9 to drive the buffer to move in a straight line towards the transmission rod 6 until the backup piston 9 contacts the buffer washer 24, and the transmission rod 6 moves to the shoulder 21 and... The quick-opening valve can be opened by separating the stop groove 19 and engaging with the stop groove 20. When the quick-opening valve needs to be closed, the pressure relief port 25 is opened, and the drive source in the backup chamber 8 flows out from the pressure relief port 25. At this time, the backup piston 9 will move back to its original position under its own gravity, and the transmission rod 6 will also be reset under its own gravity. The shoulder 21 separates from the stop groove 20 and re-engages with the stop groove 19, thus completing the closure of the quick-opening valve. 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 used in parallel for driving. The power interface 3 and the backup interface 7 can both be supplied with high-pressure gas or connected to the electric detonator, or one can be supplied with high-pressure gas and the other connected to the electric detonator. Regardless of the driving method used, any one of the driving methods can serve as a backup for the other. When any driving method fails and cannot achieve normal opening and closing of the quick-opening valve, it can be achieved through the other driving method. This redundancy design improves the overall fault tolerance and reliability.

[0056] Embodiments of the quick-opening valve of the present invention:

[0057] The quick-opening valve, including the aforementioned actuator, is connected to the actuator via a transmission rod 6, enabling normal opening and closing of the quick-opening valve. Even if one of the drive methods malfunctions, it will not affect the normal opening and closing of the quick-opening valve, thus ensuring its normal operation.

[0058] Implementation methods of the warehouse fire protection system of the present invention:

[0059] The warehouse fire protection system includes the aforementioned quick-opening valve, which is connected to the aforementioned actuator. By connecting the actuator to the quick-opening valve, the rapid opening of the quick-opening valve can be guaranteed. In the event of a fire, the actuator can open the quick-opening valve immediately, allowing the extinguishing agent to flow rapidly into the fire area, effectively controlling the fire and preventing the fire from spreading.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. An actuator comprising a cylinder, both ends of the cylinder are respectively provided with sealing plugs, the cylinder is provided with a power interface and internally provided with a pneumatic cavity in communication with the power interface, the pneumatic cavity is provided with a composite piston and a transmission rod, characterized in that: The cylinder is further provided with a backup interface and a backup cavity in communication with the backup interface, and 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 plate arranged along the radial direction of the cylinder. A through hole is formed in the partition plate and in communication with the pneumatic cavity and the backup cavity at both ends. One end of the composite piston is fitted in the pneumatic cavity, and the other end extends into the backup cavity through the through hole. One end of the transmission rod extends into the backup cavity from the composite piston, and the other end extends through a sealing plug connected to the pneumatic cavity for connecting a quick-opening valve. The composite piston and the backup piston are in push-fit with the transmission rod.

2. The actuator of claim 1, wherein: A recess is formed in the end face of the backup piston away from the through hole. The end face of the sealing plug close to the backup piston is provided with a protrusion for stop cooperation with the recess. When the protrusion and the recess are in stop cooperation, there is a gap between the backup piston and the sealing plug, and the gap is in communication with the backup interface.

3. The actuator of claim 1, wherein: The end face of the composite piston away from the through hole is provided with a stop groove, and the end face of the sealing plug close to the composite piston is provided with a stop cooperation groove. An axial shoulder is arranged on the transmission rod and always located between the stop groove and the stop cooperation groove. One end face of the axial shoulder is used for stop cooperation with the stop groove, and the other end face is used for stop cooperation with the stop cooperation groove.

4. The actuator of claim 3, wherein: The end face of the composite piston close to the through hole is a stepped face, and there is an airflow gap between the stepped face and the inner wall of the pneumatic cavity. The airflow gap is used for communication with the power interface.

5. The actuator of claim 4, wherein: Piston rings are installed on the outer peripheral surface of the composite piston cooperating with the pneumatic cavity and the inner wall of the through hole.

6. The actuator of claim 1, wherein: A buffer ring is installed in the backup cavity and located at the end of the moving path of the backup piston. The buffer ring is used for stop cooperation with the backup piston.

7. A quick-opening valve characterized by: The actuator comprises a cylinder body, a sealing plug is mounted on each end of the cylinder body, a power interface is arranged on the cylinder body, a pneumatic cavity is arranged in the cylinder body and communicates with the power interface, a composite piston and a transmission rod are arranged in the pneumatic cavity, a backup interface is arranged on the cylinder body, a backup cavity is arranged in the cylinder body and communicates with the backup interface, a backup piston is arranged in the backup cavity, the pneumatic cavity and the backup cavity are distributed along the axial direction of the cylinder body and are separated by a partition plate arranged in the radial direction of the cylinder body, a through hole is arranged in the partition plate and communicates with the pneumatic cavity and the backup cavity, one end of the composite piston is arranged in the pneumatic cavity, the other end of the composite piston 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, the other end of the transmission rod passes through the sealing plug connected with the pneumatic cavity and is connected with a quick opening valve, the composite piston and the backup piston are in a top push fit with the transmission rod; an accommodation groove is arranged on the end face of the backup piston close to the through hole, a containing hole is arranged on the bottom surface of the accommodation groove and faces the transmission rod, and a buffer member is detachably arranged in the containing hole and is in contact with the transmission rod to lift the transmission rod.

8. The quick-opening valve of claim 7, wherein: A groove is arranged on the end face of the backup piston away from the through hole, a protrusion is arranged on the end face of the sealing plug close to the backup piston and is in abutting fit with the groove, and when the protrusion is in abutting fit with the groove, a gap exists between the backup piston and the sealing plug, and the gap communicates with the backup interface.

9. The quick-opening valve of claim 7, wherein: A stop groove is arranged on the end face of the composite piston away from the through hole, a stop fit groove is arranged on the end face of the sealing plug close to the composite piston, a shaft shoulder is arranged on the transmission rod and is always located between the stop groove and the stop fit groove, one end face of the shaft shoulder is in abutting fit with the stop groove, and the other end face of the shaft shoulder is in stop fit with the stop fit groove.

10. The quick-opening valve of claim 9, wherein: The end face of the composite piston close to the through hole is a stepped face, and an airflow gap exists between the stepped face and the inner wall of the pneumatic cavity, and the airflow gap communicates with the power interface.

11. The quick-opening valve of claim 10, wherein: A piston ring is arranged on the outer circumferential surface of the composite piston in fit with the pneumatic cavity and the inner wall of the through hole.

12. The quick-opening valve of claim 7, wherein: A buffer ring is arranged in the backup cavity and is located at the end of the movement path of the backup piston, and the buffer ring is in abutting fit with the backup piston.

13. A storage fire protection system characterized by: The quick opening valve comprises an actuator, the actuator comprises a cylinder, both ends of the cylinder are respectively provided with a sealing plug, the cylinder is provided with a power interface and a pneumatic cavity in communication with the power interface, the pneumatic cavity is provided with a composite piston and a transmission rod, the cylinder is further provided with a backup interface and a backup cavity in communication with the backup interface, the backup cavity is provided with a backup piston, the pneumatic cavity and the backup cavity are distributed along the axial direction of the cylinder and are separated by a partition plate arranged along the radial direction of the cylinder, a through hole is formed in the partition plate and in communication with the pneumatic cavity and the backup cavity, one end of the composite piston is fitted in the pneumatic cavity, the other end of the composite piston 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, the other end of the transmission rod passes through the sealing plug connected with the pneumatic cavity, the composite piston and the backup piston are in top pushing fit with the transmission rod.

14. The storage fire suppression system of claim 13, wherein: An end surface of the backup piston close to the through hole is provided with a placing groove, a bottom surface of the placing groove is provided with a containing hole opposite to the transmission rod, and a buffer piece for contacting and lifting the transmission rod is detachably installed in the containing hole.

15. The storage fire suppression system of claim 13, wherein: An end surface of the backup piston away from the through hole is provided with a groove, an end surface of the sealing plug close to the backup piston is provided with a protrusion for stop cooperation with the groove, when the protrusion is in stop cooperation with the groove, there is a gap between the backup piston and the sealing plug, and the gap is in communication with the backup interface.

16. The storage fire suppression system of claim 15, wherein: An end surface of the composite piston away from the through hole is provided with a stop groove, an end surface of the sealing plug close to the composite piston is provided with a stop cooperation groove, and the transmission rod is provided with an axial shoulder always located between the stop groove and the stop cooperation groove, one end surface of the axial shoulder is used for stop cooperation with the stop groove, and the other end surface of the axial shoulder is used for stop cooperation with the stop cooperation groove.

17. The storage fire suppression system of claim 16, wherein: An 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, the airflow gap is used for communication with the power interface.

18. The storage fire suppression system of claim 13, wherein: A piston ring is installed on the outer peripheral surface of the composite piston cooperating with the pneumatic cavity and the inner wall of the through hole. A buffer ring is installed in the backup cavity, the buffer ring is located at the end of the movement path of the backup piston, and the buffer ring is used for stop cooperation with the backup piston.

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