A passive emergency actuator with controllable execution process speed

Abstract

The present invention relates to the technical field of emergency equipment, and provides a passive emergency actuator with controllable execution process speed, comprising a mechanism body, wherein the mechanism body comprises an actuating cylinder, a piston unit which can be displaced along the inner wall of the actuating cylinder is connected to the actuating cylinder, a cylinder cover unit is arranged at the cylinder mouth of the actuating cylinder, an air source mechanism and a connecting mechanism are arranged in the piston unit, respectively, a wire on the connecting mechanism extends to the outside of the piston unit, a switch sensor device is connected to the wire outside the piston unit, a power cavity is formed between the end of the piston unit away from the connecting mechanism and the cylinder bottom of the actuating cylinder, a ventilation mechanism is arranged between the air source mechanism and the power cavity; the air source mechanism, the connecting mechanism, etc. are all arranged in the piston unit, and will not come into contact with the outside air and rainwater, etc., so as to avoid rusting; avoid increasing the risk factor on the scene; and realize remote sensing of the occurrence of emergency situations such as fire.

Description

Technical Field

[0001] The invention relates to the technical field of emergency equipment, and in particular to a passive emergency execution mechanism with controllable execution process speed. Background Art

[0002] At present, key storage tanks such as liquefied gas and highly toxic liquids that constitute major hazardous sources must be equipped with emergency shut-off devices. The root valves of key storage tanks with major hazardous sources are mostly controlled by manual, electric and pneumatic valves. Among them, the commonly used electric valves or pneumatic valves are prone to losing power in emergency situations such as fires, making it impossible to quickly close the valves. Manual control, on the other hand, poses a hidden danger to the personal safety of operators.

[0003] In the prior art, there are a few valves that use fuse valves to close the tank in an emergency. However, the following problems still exist: 1. Since the fuse sensitive part itself is a component of the fuse valve, that is, the valve can only play a cutting role when a large fire burns near the valve. Therefore, even if the valve cuts off the oil circuit, the residual oil will burn the valve, thereby making the valve ineffective. 2. There is no restriction on the cutting action speed, resulting in too fast and violent action, which is easy to cause structural damage or sparks, thereby increasing the risk factor of the scene in an emergency.

[0004] How to effectively solve the above technical problems is a problem that those skilled in the art need to solve. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a passive emergency execution mechanism with controllable execution process speed.

[0006] A passive emergency actuator with controllable execution process speed comprises a mechanism body, wherein the mechanism body comprises an actuating cylinder, a piston unit which can be displaced along the inner wall of the actuating cylinder is connected to the actuating cylinder, and a cylinder cover unit is arranged at the cylinder mouth of the actuating cylinder;

[0007] The piston unit is provided with an air source mechanism and a connecting mechanism, respectively. The wires on the connecting mechanism extend to the outside of the piston unit. The wires outside the piston unit are connected to a switch sensor device.

[0008] A power chamber is formed between the end of the piston unit away from the connecting mechanism and the bottom of the actuating cylinder, and a ventilation mechanism is provided between the air source mechanism and the power chamber.

[0009] Furthermore, a piston is provided at the end of the piston unit away from the connecting mechanism side;

[0010] The gas source mechanism comprises a gas source cavity, in which a gas generator for providing actuating energy for the mechanism body is arranged, and the gas generator is arranged on the piston close to the gas source cavity side;

[0011] A battery pack is also arranged in the gas source cavity to provide trigger power for the gas generator.

[0012] Furthermore, a piston rod head is provided at the end of the piston unit away from the power chamber, and the wire passes through the piston rod head.

[0013] Furthermore, the piston rod head comprises a first rod head portion and a second rod head portion, and a flared portion is provided on the side wall of the piston unit in contact with the second rod head portion;

[0014] A step-type structure is formed between the end of the piston unit away from the power chamber and the increased opening.

[0015] Furthermore, the connecting mechanism includes an air source cavity sealing plate, a first through hole is arranged on the air source cavity sealing plate, a wire connector is arranged on the end of the first through hole away from the air source mechanism side, and the end of the wire connector away from the first through hole side is connected to the wire.

[0016] Furthermore, a communication cavity is formed among the air source cavity sealing plate, the wire connector, the side wall of the piston unit and the piston rod head.

[0017] Furthermore, the movable execution component on the executed object is connected to the piston rod head through a hinge, and the fixed component on the executed object is connected to the cylinder cover unit through a hinge.

[0018] Furthermore, the ventilation mechanism includes a damping chamber arranged between the actuating cylinder and the piston unit and the cylinder cover unit, the piston is provided with a second through hole connected to the damping chamber, the end of the second through hole away from the damping chamber is connected to the power chamber, and a third through hole is provided on the side wall of the piston unit, one end of the third through hole is connected to the damping chamber, and the other end of the third through hole is connected to the air source chamber.

[0019] Furthermore, an effective diameter of the third through hole is greater than an effective diameter of the second through hole.

[0020] Furthermore, the force applied to the piston unit is as follows:

[0021] When P1×A1=P2×A2+R, the piston unit is stationary or moves at a constant speed;

[0022] When P1×A1>P2×A2+R, the piston unit accelerates toward the piston rod head;

[0023] When P1×A1 < P2×A2 + R, the piston unit accelerates towards the power chamber side;

[0024] Among them, P1×A1 is the thrust exerted on the piston towards the piston rod head side by the pressure in the power chamber, P2×A2 is the damping force exerted on the piston towards the power chamber side by the pressure in the damping chamber, and R is the resistance exerted on the piston rod head towards the power chamber side by the load.

[0025] In the present invention, the actuating energy sources such as the air source mechanism and the connection mechanism are all arranged inside the piston unit, and will not come into contact with the outside air, rainwater, etc., thus avoiding rusting.

[0026] Since the air source mechanism, the connection mechanism, etc. are all arranged inside the piston unit, and the piston unit is arranged inside the actuating cylinder body, and both the piston unit and the actuating cylinder body are closed structures, even if a spark appears during the operation of the air source mechanism, the connection mechanism, etc., it can avoid increasing the danger coefficient at the scene.

[0027] The length of the wire can be flexibly set according to the actual situation. The switch sensing device connected to the wire can directly measure the temperature, so as to realize remotely sensing the occurrence of emergencies such as fire, and at the same time trigger the gas generator after closing the circuit when an emergency occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the mechanism body provided by the present invention;

[0029] REFERENCE SIGNS:

[0030] 1. Actuating cylinder body;

[0031] 2. Piston unit; 21. Third through hole; 22. Damping chamber; 23. Gas generator; 24. Battery pack; 25. Air source chamber; 26. Piston; 27. Second through hole;

[0032] 3. Connection mechanism; 31. Air source chamber sealing plate; 32. Wire connector; 33. Wire; 34. Switch sensing device; 35. First through hole;

[0033] 4. Piston rod head; 41. First rod head part; 42. Second rod head part; 43. Enlarged part;

[0034] 5. Cylinder cover unit;

[0035] 6. Power chamber. DETAILED DESCRIPTION OF THE INVENTION

[0036] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and examples. It is to be understood that the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The following examples are only used to explain the present invention, rather than to limit the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention. If not otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0037] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Terms such as "connection" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0038] The present invention provides an embodiment, as Figure 1 As shown, a passive emergency actuator with controllable execution process speed includes a mechanism body, the mechanism body includes an actuating cylinder 1, a piston unit 2 is connected inside the actuating cylinder 1 and can be displaced along the inner wall of the actuating cylinder 1, and a cylinder cover unit 5 is arranged at the cylinder mouth of the actuating cylinder 1.

[0039] The piston unit 2 is provided with an air source mechanism and a connecting mechanism 3 , respectively. The wire 33 on the connecting mechanism 3 extends to the outside of the piston unit 2 . The wire 33 outside the piston unit 2 is connected to a switch sensor device 34 .

[0040] A power chamber 6 is formed between the end of the piston unit 2 away from the connecting mechanism 3 and the bottom of the actuating cylinder 1 , and a ventilation mechanism is provided between the air source mechanism and the power chamber 6 .

[0041] In this embodiment, since the air source mechanism, the connecting mechanism 3, etc. are all arranged in the piston unit 2, and the piston unit 2 is arranged in the actuating cylinder 1, and the piston unit 2 and the actuating cylinder 1 are both closed structures, even if sparks appear in the air source mechanism, the connecting mechanism 3, etc. during operation, it can avoid a situation in which the risk factor on site is increased.

[0042] The length of the wire 33 can be flexibly set according to the actual situation. The switch sensor device 34 connected to the wire 33 can directly measure the temperature, so as to sense the occurrence of emergency situations such as fire at a long distance, and trigger the gas generator after closing the circuit in an emergency. The switch sensor device 34 is a thermocouple, a switch sensor, or a remote control switch. In order to increase the number of implementable methods, it can also be a manual switch, etc. The switch sensor device 34 can be a single switch or multiple switches can be connected in parallel, and the initial switch is in the open state.

[0043] When the switch sensing device 34 is closed, the battery pack 24 is in communication with the gas generator 23 .

[0044] In addition, the actuating energy sources such as the air source mechanism and the connecting mechanism 3 are all arranged in the piston unit 2 and will not come into contact with the outside air and rain water, thereby avoiding rust.

[0045] Another embodiment provided by the present invention is as follows Figure 1 As shown, a piston 26 is provided at the end of the piston unit 2 away from the connecting mechanism 3;

[0046] The gas source mechanism includes a gas source chamber 25, in which a gas generator 23 is provided for providing actuating energy for the mechanism body, and the gas generator 23 is provided on a piston 26 close to the gas source chamber 25;

[0047] A battery pack 24 is also provided in the gas source chamber 25 to provide trigger power to the gas generator 23 .

[0048] In this embodiment, a piston ring may also be provided between the piston 26 and the inner wall of the actuating cylinder 1 , so as to further achieve an airtight effect between the piston 26 and the actuating cylinder 1 .

[0049] As long as the switch sensing device 34 is closed, the gas generator 23 generates gas to provide actuating energy for the mechanism body.

[0050] The battery pack 24 can be arranged in the gas source chamber 25 or in the connecting mechanism 3 .

[0051] The battery pack 24 is connected to the inner wall of the gas source chamber 25 using a connecting component or a connecting device in the prior art.

[0052] Another embodiment provided by the present invention is as follows Figure 1As shown, the end of the piston unit 2 away from the power chamber 6 is provided with a piston rod head 4, and the wire 33 passes through the piston rod head 4.

[0053] Another embodiment provided by the present invention is as follows Figure 1 As shown, the piston rod head 4 includes a first rod head 41 and a second rod head 42, and an increased opening 43 is provided on the side wall of the piston unit 2 at the contact with the second rod head 42;

[0054] A stepped structure is formed between the end of the piston unit 2 away from the power chamber 6 and the increased opening portion 43 .

[0055] In this embodiment, the first rod head 41 , the second rod head 42 and the increased opening 43 are important foundations for realizing the stepped structure, which further realizes the sealing property of the piston rod head 4 and maintains the pressure in the communication mechanism 3 .

[0056] Another embodiment provided by the present invention is as follows Figure 1 As shown, the connecting mechanism 3 includes an air source cavity sealing plate 31, a first through hole 35 is arranged on the air source cavity sealing plate 31, a wire connector 32 is arranged on the end of the first through hole 35 away from the air source mechanism side, and the end of the wire connector 32 away from the first through hole 35 side is connected to the wire 33.

[0057] In this embodiment, the gas source chamber sealing plate 31 and the wire connector 32 provided on the first through hole 35 together separate the gas source mechanism and the connecting mechanism 3 in the piston unit 2, so that the gas source mechanism in which the gas generator 23 is placed becomes a closed space, thereby ensuring that the high-pressure gas in the gas source chamber 25 does not leak.

[0058] The wire connector 32 and the first through hole 35 are tightly connected to ensure high pressure airtightness between the gas source cavity sealing plate 31 and the wire connector 32 .

[0059] An insulating layer is provided on the outside of the wire connector 32 , and the wire connector 32 allows the current to conduct through the gas source mechanism and the connecting mechanism 3 on both sides of the gas source cavity sealing plate 31 , while the current is insulated from the gas source cavity sealing plate 31 .

[0060] The wire connector 32 is connected to the battery pack 24 and the gas generator 23 through a circuit in the prior art. Since the circuit is a mature technical solution, it will not be described in detail and will not be discussed in detail. Figure 1 Shown in.

[0061] In order to further illustrate the connecting mechanism 3, another embodiment provided by the present invention is as follows: Figure 1 As shown, a communication cavity is formed between the air source cavity sealing plate 31 , the wire connector 32 , the side wall of the piston unit 2 and the piston rod head 4 .

[0062] Another embodiment provided by the present invention is as follows Figure 1 As shown, the moving actuator on the object to be actuated is hinged to the piston rod head 4, and the fixed component on the object to be actuated is hinged to the cylinder head unit 5.

[0063] In this embodiment, the object to be actuated is a butterfly valve, a ball valve, etc., and the moving actuator is a rotating handle or a torque rod connected to the valve core of the butterfly valve or the ball valve.

[0064] When the piston unit 2 moves relative to the actuating cylinder body 1 towards the piston rod head 4 side, it drives the valve core torque rod or the rotating handle, and the torque rod or the rotating handle rotates the valve core to achieve the purpose of closing the valve.

[0065] Another embodiment provided by the present invention is as Figure 1 shown. The ventilation mechanism includes a damping chamber 22 provided between the actuating cylinder body 1, the piston unit 2 and the cylinder head unit 5. A second through hole 27 communicating with the damping chamber 22 is provided on the piston 26. The end of the second through hole 27 on the side far from the damping chamber 22 communicates with the power chamber 6. A third through hole 21 is provided on the side wall of the piston unit 2. One end of the third through hole 21 communicates with the damping chamber 22, and the other end of the third through hole 21 communicates with the air source mechanism.

[0066] In this embodiment, the second through hole 27 communicates the damping chamber 22 and the power chamber 6, and the third through hole 21 communicates the damping chamber 22 and the air source chamber 25 in the air source mechanism.

[0067] In another embodiment provided by the present invention, the effective diameter of the third through hole 21 is larger than the effective diameter of the second through hole 27.

[0068] In this embodiment, the pressure in the air source chamber 25 and the pressure in the damping chamber 22 can quickly reach equilibrium, and at the same time, the second through hole 27 becomes a flow limiting hole.

[0069] In order to better achieve the working effect of the mechanism body, another embodiment provided by the present invention is as Figure 1 shown. The ventilation mechanism is located on one side of the piston unit 2.

[0070] Another embodiment provided by the present invention is as Figure 1 shown. The force condition of the piston unit is:

[0071] When P1×A1 = P2×A2 + R, the piston unit does not move or moves at a constant speed;

[0072] When P1×A1 > P2×A2 + R, the piston unit moves towards the piston rod head side with an accelerated motion;

[0073] When P1×A1 < P2×A2 + R, the piston unit moves towards the power chamber side with an accelerated motion;

[0074] Among them, P1×A1 is the thrust exerted on the piston by the pressure in the power chamber toward the piston rod head.

[0075] P2×A2 is the damping force exerted on the piston toward the power chamber by the pressure in the damping chamber, and R is the resistance exerted on the piston rod head toward the power chamber.

[0076] In the present invention, the execution method of the passive emergency actuator with controllable execution process speed is:

[0077] After the switch sensing device senses an emergency situation, it closes the switch and connects the battery pack and the gas generator through a wire;

[0078] When the battery pack and the gas generator are connected, the gas generator generates gas. The gas realizes the relative displacement between the piston unit and the actuating cylinder according to the pre-set force conditions of the piston unit, the pressure and resistance in the gas source chamber, the damping chamber and the power chamber, so that the object to be executed completes the execution of the target task.

[0079] After the gas generator generates gas, the pressure inside the gas source chamber increases rapidly. Since the pressure inside the gas source chamber is higher than the pressure inside the damping chamber, the gas in the gas source chamber flows into the damping chamber through the third through hole, and the gas flowing into the damping chamber increases the pressure inside the damping chamber. Since the pressure inside the damping chamber is higher than the pressure inside the power chamber, the gas inside the damping chamber flows into the power chamber through the second through hole. At this time, the inflowing gas increases the pressure inside the power chamber, and the pressure inside the damping chamber decreases due to the outflow of gas, so that the piston unit moves toward the piston rod head. In this process, the diameter of the second through hole is the key to adjusting the speed of change of the difference between the pressure in the damping chamber and the pressure in the gas source chamber.

[0080] When the piston unit moves toward the piston rod head under the push of the piston: the volume of the damping chamber decreases, compressing the gas inside the damping chamber, and the pressure in the damping chamber gradually increases. The volume of the power chamber increases, the gas inside the power chamber expands, and the pressure in the power chamber gradually decreases. The speed at which the piston unit moves toward the piston rod head is one of the reasons for the speed at which the difference between the pressure in the damping chamber and the pressure in the power chamber changes.

[0081] When the switch sensing device initially senses an emergency: there is almost no gas in the power chamber. At this time, although the force condition of the piston also satisfies P1×A1 < P2×A2 + R, and the piston unit should have accelerated towards the power chamber side, since there is no movement gap between the piston and the bottom of the actuating cylinder body, the piston unit is in a short-term stationary state. As gas flows into the power chamber through the second through-hole, the internal pressure of the power chamber gradually increases. When P1×A1 = P2×A2 + R, the piston unit is still stationary at this time but has reached the critical state of movement. Gas continues to flow into the power chamber through the second through-hole, and the internal pressure of the power chamber continues to increase. When P1×A1 > P2×A2 + R, the piston unit accelerates towards the piston rod head side.

[0082] When the moving speed of the piston unit towards the piston rod head side reaches the designed speed of the piston unit, then P1×A1 = P2×A2 + R, but at this time the piston unit will move uniformly towards the piston rod head side.

[0083] After that, when the moving speed of the piston unit towards the piston rod head side is lower than the designed speed, then P1×A1 > P2×A2 + R, and the piston unit accelerates towards the piston rod head side.

[0084] When the moving speed of the piston unit towards the piston rod head side is higher than the designed speed: then P1×A1 < P2×A2 + R, and the piston unit accelerates towards the power chamber side.

[0085] If other conditions are the same, the diameter of the second through-hole is positively correlated with the designed speed of the piston unit. That is to say, if the diameter of the second through-hole is large, the designed speed of the piston unit is fast; vice versa. By controlling the diameter of the second through-hole, the purpose of controlling the designed speed of the piston unit can be achieved.

[0086] According to different situations, the piston ring that plays a sealing role on the piston can be removed, and the damping chamber and the power chamber are connected through the gap between the piston and the inner wall of the actuating cylinder to replace the role of the second through-hole in the present invention.

[0087] The above is not a limitation of the present invention. Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments. Those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Modifications or replacements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A passive emergency actuator with controllable execution process speed, comprising an actuator body, characterized in that: The mechanism body comprises an actuating cylinder, a piston unit which can be displaced along the inner wall of the actuating cylinder is connected to the actuating cylinder, and a cylinder cover unit is arranged at the cylinder mouth of the actuating cylinder; The piston unit is provided with an air source mechanism and a connecting mechanism, respectively. The wires on the connecting mechanism extend to the outside of the piston unit. The wires outside the piston unit are connected to a switch sensor device. A power chamber is formed between the end of the piston unit away from the connecting mechanism and the bottom of the actuating cylinder, and a ventilation mechanism is provided between the air source mechanism and the power chamber; A piston is provided at the end of the piston unit away from the connecting mechanism; The gas source mechanism comprises a gas source cavity, in which a gas generator for providing actuating energy for the mechanism body is arranged, and the gas generator is arranged on the piston close to the gas source cavity side; The gas source chamber is also provided with a battery pack for providing a trigger power source for the gas generator; The ventilation mechanism includes a damping chamber arranged between the actuating cylinder, the piston unit and the cylinder cover unit, the piston is provided with a second through hole connected to the damping chamber, the end of the second through hole away from the damping chamber is connected to the power chamber, and a third through hole is provided on the side wall of the piston unit, one end of the third through hole is connected to the damping chamber, and the other end of the third through hole is connected to the air source chamber; The switch sensing device closes the switch after sensing an emergency situation, and connects the battery pack and the gas generator through a wire; when the battery pack and the gas generator are connected, the gas generator generates gas, and the gas realizes the relative displacement between the piston unit and the actuating cylinder according to the pre-set force conditions of the piston unit, the pressure and resistance in the gas source chamber, the damping chamber, and the power chamber, so that the object to be executed completes the execution of the target task.

2. The passive emergency actuator with controllable execution process speed according to claim 1, characterized in that: The end of the piston unit away from the power chamber is provided with a piston rod head, and the wire passes through the piston rod head.

3. The passive emergency actuator with controllable execution process speed according to claim 2, characterized in that: The piston rod head comprises a first rod head portion and a second rod head portion, and a flared portion is provided on the side wall of the piston unit at a position in contact with the second rod head portion; A step-type structure is formed between the end of the piston unit away from the power chamber and the increased opening.

4. The passive emergency actuator with controllable execution process speed according to claim 3 is characterized in that: The connecting mechanism includes an air source cavity sealing plate, a first through hole is arranged on the air source cavity sealing plate, a wire connector is arranged on the end of the first through hole away from the air source mechanism side, and the end of the wire connector away from the first through hole side is connected to the wire.

5. The passive emergency actuator with controllable execution process speed according to claim 4, characterized in that: A communication cavity is formed between the air source cavity sealing plate, the wire connector, the side wall of the piston unit and the piston rod head.

6. The passive emergency actuator with controllable execution process speed according to claim 2, characterized in that: The movable execution component on the executed object is connected to the piston rod head through a hinge, and the fixed component on the executed object is connected to the cylinder cover unit through a hinge.

7. The passive emergency actuator with controllable execution process speed according to claim 1, characterized in that: The effective diameter of the third through hole is greater than the effective diameter of the second through hole.

8. The passive emergency actuator with controllable execution process speed according to claim 7, characterized in that: The force conditions of the piston unit are as follows: When P1×A1 = P2×A2 + R, the piston unit is stationary or moves at a constant speed; When P1×A1 > P2×A2 + R, the piston unit accelerates towards the piston rod head side; When P1×A1 < P2×A2 + R, the piston unit accelerates towards the power chamber side; Wherein, P1×A1 is the thrust exerted on the piston by the pressure in the power chamber towards the piston rod head side, P2×A2 is the damping force exerted on the piston by the pressure in the damping chamber towards the power chamber side, and R is the resistance exerted on the piston rod head by the load towards the power chamber side.

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