An indirectly actuated fire extinguishing device and a fire extinguishing method

Abstract

The present invention discloses an indirectly actuated fire extinguishing device and a fire extinguishing method, which includes a cylinder body. A spraying part is arranged at the front end of the cylinder body. A first piston that is slidably matched with the cylinder body is arranged inside the cylinder body. A fire extinguishing agent is arranged between the first piston and the spraying part. A main gas generating agent and an indirect starting mechanism that cooperates with the main gas generating agent are arranged between the first piston and the rear end of the cylinder body. The indirect starting mechanism includes a starting housing. A second piston that is slidably matched with the starting housing is arranged inside the starting housing. A secondary gas generating agent is arranged between the second piston and the starting housing. By arranging the indirect starting mechanism, the present invention enables the fire extinguishing device not to cause a reduction in the spraying pressure of the fire extinguishing agent due to air leakage during the spraying process, greatly improving the energy efficiency of the fire extinguishing device.

Description

Technical Field

[0001] The present invention relates to the field of fire protection technology, and specifically refers to an indirectly actuated fire extinguishing device and a fire extinguishing method. Background Art

[0002] At present, many fire extinguishing devices on the market adopt a non-pressurized form. The advantage of this form compared to pressurized fire extinguishing devices is that when the device is in transportation, installation, and normal operation states, the device does not carry pressure, which greatly improves the safety performance of the device.

[0003] The non-pressurized fire extinguishing device adopted on the market usually contains a gas generating agent inside the fire extinguishing device. When the fire extinguishing device is activated, the gas generating agent generates a large amount of gas to push fire extinguishing substances such as dry powder, water, and perfluoromethylcyclohexanone in the fire extinguishing device out of the fire extinguishing device to implement fire extinguishing. However, such devices usually face a problem that the activation method of the gas generating agent generally uses a thermal fuse and / or an electronic igniter. If the sealing effect at the wire outlet is not good, a large amount of gas generated by the gas generating agent will spray out from the wire outlet, thereby reducing the spraying pressure of the fire extinguishing device and the fire extinguishing effect of the fire extinguishing device. To solve this problem, many products adopt strengthening the sealing of the wire outlet to reduce the risk of air leakage. However, the actual application environment of the fire extinguishing device may be high temperature, high humidity, salt corrosion, corrosion, etc., resulting in a decrease in the sealing effect. In addition, in addition to the activation wire, the fire extinguishing device may also have feedback wires entering the device interior. The more wire harnesses entering the device interior, the more likely the sealing function of the device is to fail.

[0004] In the patent No. 202121860046.2, a heat conduction method is used to activate the fire extinguishing device. This method can ensure that after the device is activated, the gas generating agent will not leak. However, through the form of heat conduction, it is difficult to ensure that the heat will be concentrated and transmitted to the gas generating agent and its activation structure, and with the addition of feedback wire harnesses and feedback devices, a certain amount of heat will also be absorbed. In addition, the heat conduction efficiency is relatively low compared to direct activation. If a feedback device (thermal fuse resistance) is added at the position of the first fuse, a situation may occur where the first fuse is activated and the feedback device sends a feedback signal, but due to non-concentrated heat conduction, the second fuse is not activated, or the gas generating agent fails to be activated due to aging, then it will provide false signals to people, making people think that the device has been activated, resulting in a wrong judgment of the fire situation. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above deficiencies and provide an indirectly actuated fire extinguishing device and a fire extinguishing method, so that the fire extinguishing device will not reduce the spraying pressure of the fire extinguishing agent due to air leakage during the spraying process, and improve the energy efficiency of the fire extinguishing device.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: an indirectly actuated fire extinguishing device, including a cylinder body, a spraying part is arranged at the front end of the cylinder body, a first piston slidably matched with the cylinder body is arranged in the cylinder body, a fire extinguishing agent is arranged between the first piston and the spraying part, a main gas generating agent and an indirect starting mechanism cooperating with the main gas generating agent are arranged between the first piston and the rear end of the cylinder body, the indirect starting mechanism includes a starting housing, and a second piston slidably matched with the starting housing is arranged in the starting housing, and a secondary gas generating agent is arranged between the second piston and the starting housing.

[0007] Preferably, one end of the first starting wire contacts the secondary gas generating agent, and a second starting wire is arranged between the second piston and the main gas generating agent.

[0008] Preferably, an ignition charge is arranged on the side or top of the second piston, and a friction layer is arranged on the inner wall of the starting housing.

[0009] Preferably, the first starting wire is of an electric igniter structure, and the second starting wire is of a heat-sensitive wire structure.

[0010] Preferably, the second piston is of a metal structure, wires are arranged on both sides of the rear end of the starting housing, and the wires are connected to a feedback mechanism.

[0011] Preferably, the main gas generating agent is arranged in a medicine bin, and the medicine bin communicates with the front end of the starting housing; an insulating sealing plug is further arranged at the rear end of the starting housing.

[0012] Preferably, the spraying part includes a front end cover arranged at the front end of the cylinder body, a spraying hole is opened in the front end cover, and a spray port diaphragm is arranged in the spraying hole; a spray head bolt threadedly matched with the spraying hole is arranged on one side of the spray port diaphragm, a tetrafluoroethylene gasket is arranged on the other side, and a channel is opened in the spray head bolt.

[0013] Preferably, the front end of the cylinder body is threadedly connected to the front end cover, the rear end of the cylinder body is threadedly connected to the rear end cover, a filling hole is further opened in the front end cover, and a plug threadedly matched with the filling hole is arranged in the filling hole.

[0014] Preferably, a burst diaphragm is arranged on the surface of the first piston, and a piston sealing ring and a wear-resistant ring are arranged between the side surface of the first piston and the inner side of the cylinder body.

[0015] In addition, the present invention also discloses a fire extinguishing method for the above indirectly actuated fire extinguishing device, which includes the following steps:

[0016] S1: When a fire breaks out in the outside world, the first starting wire ignites the secondary gas generating agent, and the secondary gas generating agent burns to generate gas, thereby pushing the second piston in the starting housing to move towards the position where the second starting wire is located;

[0017] S2: During the movement of the second piston, the ignition charge generates heat by friction with the friction layer and is ignited, and the ignition charge generates heat to ignite the second starting wire;

[0018] S3: The second starting wire ignites the main gas-generating agent. The main gas-generating agent burns to generate gas. A part of the gas generated by the main gas-generating agent pushes the first piston towards the spraying part. The fire extinguishing agent is pressurized and sprayed out from the spraying part to carry out the fire extinguishing process;

[0019] S4: Another part of the gas generated by the main gas-generating agent will reversely enter the starting housing, thereby reversely pushing the second piston towards the position where the wire is located, and then connecting the wire and its feedback mechanism, so that the feedback mechanism generates a feedback signal.

[0020] Advantages of the present invention:

[0021] 1. By setting an indirect starting mechanism, the fire extinguishing device in the present invention will not cause the spraying pressure of the fire extinguishing agent to decrease due to air leakage during the spraying process, greatly improving the energy efficiency of the fire extinguishing device.

[0022] 2. When the second piston in the present invention moves reversely and contacts the wire, the circuit where the feedback mechanism is located will be connected, so that the corresponding alarm will sound, providing people with an accurate judgment; and in the present invention, the second piston will only move reversely and contact the wire when the main gas-generating agent is ignited to generate gas with reverse thrust, and there will be no phenomenon that the feedback mechanism works erroneously due to the main gas-generating agent not being ignited and started.

[0023] 3. This indirect starting (or multi-stage starting) method in the present invention greatly reduces the requirements for the sealing performance of the starting mechanism. Since the volume of the indirect starting structure is much smaller than that of the fire extinguishing device, a conventional sealing structure can effectively prevent the influence of air leakage on the piston pushing. Description of the drawings

[0024] Figure 1 It is a three-dimensional structure schematic diagram of a fire extinguishing device with indirect starting;

[0025] Figure 2 It is Figure 1 the front view structure schematic diagram of;

[0026] Figure 3 It is Figure 2 the B-B sectional view structure schematic diagram of;

[0027] Figure 4 It is Figure 3 the enlarged structure schematic diagram of the area where the main gas-generating agent and the indirect starting mechanism are located in; Detailed implementation manners

[0028] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0029] Such as Figures 1 to 4As shown in the figure, an indirectly activated fire extinguishing device includes a cylinder body 1. A spraying part 3 is provided at the front end of the cylinder body 1. A first piston 4 that is slidably engaged with the cylinder body 1 is provided inside the cylinder body 1. An extinguishing agent 5 is provided between the first piston 4 and the spraying part 3. A main gas generating agent 6 and an indirect activation mechanism 7 that cooperates with the main gas generating agent 6 are provided between the first piston 4 and the rear end of the cylinder body 1. The indirect activation mechanism 7 includes an activation housing 7.1. A second piston 7.2 that is slidably engaged with the activation housing 7.1 is provided inside the activation housing 7.1. A secondary gas generating agent 7.3 is provided between the second piston 7.2 and the activation housing 7.1.

[0030] Preferably, one end of the secondary gas generating agent 7.3 is in contact with a first activation wire 7.4. A second activation wire 7.5 is provided between the second piston 7.2 and the main gas generating agent 6. Preferably, the main gas generating agent 6 and the secondary gas generating agent 7.3 in this embodiment can be selected as aerosol generating agents, which can generate a large amount of aerosol or gas after being ignited, so as to provide thrust for the ejection of the extinguishing agent 5; the extinguishing agent 5 can be selected from dry powder extinguishing agents, water-based extinguishing agents, perfluoromethylcyclohexanone and other extinguishing agents.

[0031] Preferably, an ignition charge 7.6 is provided on the side or top of the second piston 7.2, and a friction layer 7.7 is provided on the inner wall of the activation housing 7.1. In this embodiment, after the ignition charge 7.6 and the friction layer 7.7 move relative to each other, the ignition charge 7.6 will be ignited, similar to the way a match head rubs against the side wall of a matchbox.

[0032] Preferably, the first activation wire 7.4 is of an electric igniter structure, and the second activation wire 7.5 is of a thermal fuse structure. In this embodiment, when the first activation wire 7.4 is of an electric igniter structure, it is connected to a fire detection device. The fire detection device is a temperature sensor and / or a smoke sensor. When a fire, overheating or other situations occur, after the fire detection device detects the high-temperature environment generated by the fire externally, it sends a signal to the microprocessor, and the microprocessor controls the first activation wire 7.4 to ignite the secondary gas generating agent 7.3. And the second activation wire 7.5 is of a thermal fuse structure. After the ignition charge 7.6 is ignited, it can directly ignite the second activation wire 7.5, and finally directly ignite the main gas generating agent 6.

[0033] Preferably, the second piston 7.2 is of a metal structure. Conductive wires 7.8 are provided on both sides of the rear end of the activation housing 7.1, and the conductive wires 7.8 are connected to a feedback mechanism. In this embodiment, the feedback mechanism can adopt an alarm. When the second piston 7.2 moves in the reverse direction and contacts the conductive wires 7.8, the circuit where the feedback mechanism is located will be connected, so that the corresponding alarm will sound, providing people with an accurate judgment; and in the present invention, the second piston 7.2 will only move in the reverse direction and contact the conductive wires 7.8 when the main gas generating agent 6 is ignited and generates gas with a reverse thrust, and there will be no phenomenon that the feedback mechanism works erroneously due to the main gas generating agent 6 not being ignited and activated.

[0034] Preferably, the main gas generating agent 6 is arranged in the agent bin 13, and the agent bin 13 communicates with the front end of the starting housing 7.1; an insulating sealing plug 7.9 is also arranged at the rear end of the starting housing 7.1. The insulating sealing plug 7.9 in this embodiment is made of non-metallic material, which can prevent the indirect starting structure 7 from getting water, leaking air, and short-circuiting. Since the volume of the indirect starting structure 7 is much smaller than that of the fire extinguishing device, the conventional sealing structure can effectively prevent the influence of air leakage on the pushing of the first piston 4.

[0035] Preferably, the spraying part 3 includes a front end cover 3.1 arranged at the front end of the cylinder body 1. A spraying hole 3.2 is opened in the front end cover 3.1, and a nozzle diaphragm 3.3 is arranged in the spraying hole 3.2; a nozzle bolt 3.4 that is in threaded fit with the spraying hole 3.2 is arranged on one side of the nozzle diaphragm 3.3, and a tetrafluoroethylene gasket 3.5 is arranged on the other side. A channel is opened in the nozzle bolt 3.4. In the above structure, the nozzle diaphragm 3.3 can be installed in the spraying hole 3.2 through the nozzle bolt 3.4, and the installation method is simple. At the same time, by setting the tetrafluoroethylene gasket 3.5, the sealing performance at the nozzle bolt 3.4 can be ensured; the nozzle diaphragm 3.3 in this embodiment can play a sealing role before the fire extinguishing device is started, preventing the fire extinguishing agent 5 from absorbing moisture or escaping, and after the fire extinguishing device is started, the nozzle diaphragm 3.3 is crushed under pressure, so that the fire extinguishing agent 5 can be normally sprayed out from the spraying hole 3.2.

[0036] Preferably, the front end of the cylinder body 1 is in threaded connection with the front end cover 3.1, the rear end of the cylinder body 1 is in threaded connection with the rear end cover 2, and a filling hole 8 is also opened in the front end cover 3.1. A plug 9 that is in threaded fit with the filling hole 8 is arranged in the filling hole 8. After setting the filling hole 5 at the front end cover 3.1, it is convenient to fill the fire extinguishing agent 5 after the manufacturing is completed. Just unscrew the plug 9, fill the fire extinguishing agent 5 into the fire extinguishing device, and then install the plug 9. The whole process improves the filling efficiency.

[0037] Preferably, a bursting diaphragm 10 is arranged on the surface of the first piston 4, and a piston sealing ring 11 and a wear-resistant ring 12 are arranged between the side surface of the first piston 4 and the inner side of the cylinder body 1. After setting the bursting diaphragm 10, when the first piston 4 suddenly gets stuck during the moving process, the air pressure on one side of the first piston 4 will suddenly increase. At this time, it is necessary to relieve the pressure in time, otherwise there will be a risk of explosion. At this time, the bursting diaphragm 10 will play a role in relieving the pressure. When the pressure reaches a certain value, the bursting diaphragm 10 will rupture, so that the gas can be relieved from this position in time; after setting the piston sealing ring 11, the airtightness of the first piston 4 during movement can be ensured, preventing air leakage. After setting the wear-resistant ring 12 (which can be made of hard material), the friction force when the first piston 4 slides on the inner side of the cylinder body 1 can be greatly reduced, making its sliding smoother.

[0038] In addition, the present invention also discloses a fire extinguishing method for the above-mentioned indirectly started fire extinguishing device, which includes the following steps:

[0039] S1: When a fire breaks out in the outside world, the first activation wire 7.4 ignites the secondary gas-generating agent 7.3. The secondary gas-generating agent 7.3 burns to generate gas, thereby pushing the second piston 7.2 in the activation housing 7.1 to move towards the position where the second activation wire 7.5 is located;

[0040] S2: During the movement of the second piston 7.2, the ignition charge 7.6 generates heat due to friction with the friction layer 7.7 and is ignited. The ignition charge 7.6 generates heat to ignite the second activation wire 7.5;

[0041] S3: The second activation wire 7.5 ignites the main gas-generating agent 6. The main gas-generating agent 6 burns to generate gas. A part of the gas generated by the main gas-generating agent 6 pushes the first piston 4 towards the discharge part 3. The fire extinguishing agent 5 is pressurized and ejected from the discharge part 3 to carry out the fire extinguishing process;

[0042] S4: Another part of the gas generated by the main gas-generating agent 6 will reversely enter the activation housing 7.1, thereby reversely pushing the second piston 7.2 towards the position where the wire 7.8 is located, and then connecting the wire 7.8 and its feedback mechanism, so that the feedback mechanism generates a feedback signal.

[0043] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The embodiments in this application and the features in the embodiments can be arbitrarily combined with each other without conflict. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An indirectly actuated fire extinguishing device, comprising a cylinder body (1), a spraying part (3) is arranged at the front end of the cylinder body (1), a first piston (4) which is slidably matched with the cylinder body (1) is arranged in the cylinder body (1), a fire extinguishing agent (5) is arranged between the first piston (4) and the spraying part (3), a main gas generating agent (6) and an indirect starting mechanism (7) which is matched with the main gas generating agent (6) are arranged between the first piston (4) and the rear end of the cylinder body (1). Characterized in that: The indirect starting mechanism (7) comprises a starting housing (7.1), a second piston (7.2) which is slidably matched with the starting housing (7.1) is arranged in the starting housing (7.1), a secondary gas generating agent (7.3) is arranged between the second piston (7.2) and the starting housing (7.1); One end of the secondary gas generating agent (7.3) is in contact with one end of a first starting wire (7.4), and a second starting wire (7.5) is arranged between the second piston (7.2) and the main gas generating agent (6); A detonator (7.6) is arranged on the side or top of the second piston (7.2), and a friction layer (7.7) is arranged on the inner wall of the starting housing (7.1); The first starting wire (7.4) is of an electric ignition head structure, and the second starting wire (7.5) is of a heat-sensitive wire structure.

2. An indirectly actuated fire extinguishing device according to claim 1, Characterized in that: The second piston (7.2) is of a metal structure, wires (7.8) are arranged on both sides of the rear end of the starting housing (7.1), and the wires (7.8) are connected with a feedback mechanism.

3. An indirectly actuated fire extinguishing device according to claim 1, Characterized in that: The main gas generating agent (6) is arranged in a medicine bin (13), and the medicine bin (13) is communicated with the front end of the starting housing (7.1); An insulating sealing plug (7.9) is further arranged at the rear end of the starting housing (7.1).

4. An indirectly actuated fire extinguishing device according to claim 1, Characterized in that: The spraying part (3) comprises a front end cover (3.1) arranged at the front end of the cylinder body (1), a spraying hole (3.2) is opened in the front end cover (3.1), and a spraying orifice diaphragm (3.3) is arranged in the spraying hole (3.2); A spray head bolt (3.4) which is in threaded fit with the spraying hole (3.2) is arranged on one side of the spraying orifice diaphragm (3.3), a tetrafluoro washer (3.5) is arranged on the other side, and a channel is opened in the spray head bolt (3.4).

5. An indirectly actuated fire extinguishing device according to claim 4, Characterized in that: The front end of the cylinder body (1) is in threaded connection with the front end cover (3.1), the rear end of the cylinder body (1) is in threaded connection with a rear end cover (2), a filling hole (8) is further opened in the front end cover (3.1), and a plug (9) which is in threaded fit with the filling hole (8) is arranged in the filling hole (8).

6. An indirectly actuated fire extinguishing device according to claim 1, Characterized in that: A bursting diaphragm (10) is arranged on the surface of the first piston (4), and a piston sealing ring (11) and a wear-resistant ring (12) are arranged between the side surface of the first piston (4) and the inner side of the cylinder body (1).

7. A fire extinguishing method for the indirectly actuated fire extinguishing device according to any one of claims 1 to 6, Characterized in that: It comprises the following steps: S1: When a fire breaks out in the outside world, the first activation wire (7.4) ignites the secondary gas generator (7.3), and the secondary gas generator (7.3) burns to generate gas, thereby pushing the second piston (7.2) in the activation housing (7.1) towards the position where the second activation wire (7.5) is located; S2: During the movement of the second piston (7.2), the ignition charge (7.6) generates heat by friction with the friction layer (7.7) and is ignited, and the ignition charge (7.6) generates heat to ignite the second activation wire (7.5); S3: The second activation wire (7.5) ignites the main gas generator (6), and the main gas generator (6) burns to generate gas. A part of the gas generated by the main gas generator (6) pushes the first piston (4) towards the discharge part (3), and the fire extinguishing agent (5) is pressurized and ejected from the discharge part (3) to carry out the fire extinguishing process; S4: Another part of the gas generated by the main gas generator (6) will enter the activation housing (7.1) in the reverse direction, thereby pushing the second piston (7.2) in the reverse direction towards the position where the wire (7.8) is located, and then connecting the wire (7.8) and its feedback mechanism, so that the feedback mechanism generates a feedback signal.

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