Indirect initialization mechanism for fire extinguishing device, and initialization method for the same

Description

1 / 12 Indirect initiation mechanism for a fire extinguishing device, and initiation method for the same field of the art.

[001] The present disclosure relates to the field of fire protection technology and, specifically, to an indirect initiation mechanism for a fire extinguishing device and an initiation method for the same. BACKGROUND

[002] Currently, many fire extinguishing devices on the market employ a non-stored pressure mode. Compared with a fire extinguishing device with stored pressure, this form has the advantage that such a device does not have pressure during transport, assembly, and normal operation. This greatly improves the safety performance of the device.

[003] The non-pressurized fire extinguishing device commonly used in the market is usually loaded with a gas-generating agent inside. When the fire extinguishing device is started, the gas-generating agent generates a large amount of gas to propel dry powder, a water base, perfluorohexanone, or other fire-extinguishing substances into the fire extinguishing device to be sprayed and extinguish the fire. However, this type of device usually presents a problem in that a starting method for the gas-generating agent usually uses a heat-sensitive wire and / or an electronic igniter. If a wire outlet part has a poor sealing effect, the large amount of gas generated by the gas-generating agent is sprayed out of the wire outlet part, which thus reduces the spray pressure of the fire extinguishing device and reduces the fire extinguishing effect of the fire extinguishing device.To solve this problem, in many products, the sealing at the wire outlet is improved to reduce the risk of gas leakage. However, a real-world application environment for the fire extinguishing device may present conditions such as high temperature, high humidity, and saline corrosion. Petition 870250085720, dated 09 / 23 / 2025, page 7 / 57 2 / 12 and corrosion, which can lead to a decrease in the sealing effect. Furthermore, in addition to a starter wire, a feedback wire may also enter the device. If more wiring harnesses enter the device, the device's sealing function fails more easily.

[004] In patent no. 202121860046,2, the fire extinguishing device is initiated by heat conduction. This method ensures that the gas-generating agent does not leak after the device is initiated. However, by heat conduction, it is difficult to ensure that heat is intensely transferred to the gas-generating agent and its initiating structure, and with the addition of the feedback wire and a feedback device, a certain amount of heat will also be absorbed. Furthermore, the efficiency of heat conduction is lower than the efficiency of direct initiation. If a feedback device (thermistor) is added in the position of a first fuse, there may be a situation where the first fuse is activated and the feedback device sends a feedback signal, but a second fuse is not activated due to non-intensive heat conduction, or the gas-generating agent is not activated because it has expired over time.This will provide an incorrect signal to a person, causing them to mistakenly believe the device has been activated and make an incorrect assessment of a fire. SUMMARY

[005] The present disclosure aims to overcome the above shortcomings and provides an indirect initiating mechanism for a fire extinguishing device and an initiating method for it. A decrease in the spray pressure of a fire extinguishing agent due to gas leakage in a spraying process of the fire extinguishing device is avoided, and the efficiency of the fire extinguishing device is improved.

[006] To solve the problems of the above technique, a solution of the technique used in the present disclosure is as follows: an indirect initiating mechanism for a fire extinguishing device includes a mechanism of Petition 870250085720, dated 09 / 23 / 2025, page 8 / 57 3 / 12 Indirect starting that cooperates with a primary gas generating agent; the indirect starting mechanism includes a starting casing; a second piston, which is in sliding engagement with the starting casing, is disposed in the starting casing; and a secondary gas generating agent is disposed between the second piston and the starting casing.

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

[008] Preferably, the ignition powder is arranged on a side portion or on top of the second piston, and a friction layer is arranged on an inner wall of the starting casing.

[009] Preferably, the first initialization wire is an electric ignition structure and the second initialization wire is a heat-sensitive wire structure.

[010] Preferably, the second piston is a metallic structure; the conducting wires are arranged on two sides of a rear end of the initial casing; and the conducting wires are connected to a feedback mechanism.

[011] Preferably, the main gas-generating agent is disposed in an agent chamber; and the agent chamber is communicated to a front end of the initialization casing.

[012] Preferably, an insulating seal plug is also provided at the rear end of the boot housing.

[013] In addition, the present disclosure further reveals a startup method for the indirect startup mechanism of the fire extinguishing device. The startup method includes the following steps:

[014] S1: when a fire occurs outside, the first starter wire ignites the secondary gas generating agent and the secondary gas generating agent is burned to generate gas to drive the second piston in Petition 870250085720, dated 09 / 23 / 2025, page 9 / 57 4 / 12 boot housing to move towards a position of the second boot wire;

[015] S2: in the process of moving the second piston, the ignition powder generates heat by friction with the friction layer and is ignited, and the heat generated by the ignition powder ignites the second starting wire;

[016] S3: the second ignition wire ignites the main gas-generating agent; the main gas-generating agent is burned to generate gas; a portion of the gas generated by the main gas-generating agent is used as a propellant source for a fire extinguishing agent in the fire extinguishing device, to spray the fire extinguishing agent to implement a fire extinguishing process; and

[017] S4: the other part of the gas generated by the main gas generating agent enters the initialization casing in reverse and drives the second piston in reverse to move towards the positions of the conducting wires, to communicate the conducting wires with the feedback mechanism, and the feedback mechanism generates a feedback signal.

[018] Preferably, in step S3, a portion of the gas generated by the main gas-generating agent drives a first piston of the fire extinguishing device to move towards a spray portion; and the fire extinguishing agent is compressed to be sprayed from the spray portion to implement the fire extinguishing process.

[019] Preferably, both the primary gas generating agent and the secondary gas generating agent use aerosol generating agents, and the fire extinguishing agent is a dry powder fire extinguishing agent or a water-based fire extinguishing agent or a perfluorohexanone fire extinguishing agent.

[020] The present revelation has the following beneficial effects:

[021] 1. According to the indirect initialization mechanism for the fire extinguishing device of the present disclosure, a decrease in the spray pressure of a fire extinguishing agent due to leakage is avoided. Petition 870250085720, dated 09 / 23 / 2025, page 10 / 57 5 / 12 gas in a fire extinguishing device spraying process, and the efficiency of the fire extinguishing device is greatly improved.

[022] 2. When the second piston in the present disclosure moves in reverse to make contact with the conducting wires, a circuit in which the feedback mechanism is located can be switched on, so that a corresponding alarm device emits an alarm to provide a correct determination to people. Furthermore, the second piston in the present disclosure can move in reverse to make contact with the conducting wires only when the main gas-generating agent is ignited and generates the gas with a reverse thrust, so that a phenomenon in which the feedback mechanism malfunctions because the main gas-generating agent is not ignited and not started is avoided.

[023] 3. The indirect initialization mode (or multi-level initialization) in the present disclosure greatly reduces the requirement of the initialization mechanism for a sealing property. The volume of an indirect initialization structure is much smaller than the volume of the fire extinguishing device, so that a conventional sealing structure can effectively prevent the impact of gas leakage on the piston thrust. BRIEF DESCRIPTION OF THE DRAWINGS

[024] Figure 1 is a schematic diagram of a cross-sectional structure of an indirect initialization mechanism;

[025] Figure 2 is a schematic diagram of a three-dimensional structure of a fire extinguishing device with an indirect ignition mechanism;

[026] Figure 3 is a schematic diagram of a structure in front view of Figure 2; and

[027] Figure 4 is a schematic diagram of a structure in cross-section along BB in Figure 3. DETAILED DESCRIPTION OF THE MODALITIES

[028] The present revelation will be further described in detail below with Petition 870250085720, dated 09 / 23 / 2025, page 11 / 57 6 / 12 reference to the attached drawings and specific modalities.

[029] Embodiment 1: As shown in Figure 1, an indirect initiating mechanism for a fire extinguishing device includes an indirect initiating mechanism 7 that cooperates with a primary gas generating agent 6. The indirect initiating mechanism 7 includes an initiating casing 7.1; a second piston 7.2, which is in sliding engagement with the initiating casing 7.1, is disposed in the initiating casing 7.1; and a secondary gas generating agent 7.3 is disposed between the second piston 7.2 and the initiating casing 7.1.

[030] Preferably, 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.

[031] Preferably, the ignition powder 7.6 is disposed on a side portion or on top of the second piston 7.2, and a friction layer 7.7 is disposed on an inner wall of the starting casing 7.1. In this embodiment, after the ignition powder 7.6 and the friction layer 7.7 move relatively, the ignition powder 7.6 can be ignited. This is similar to the way a match tip rubs against a side wall of a matchbox.

[032] Preferably, the first initial wire 7.4 is an electric ignition structure and the second initial wire 7.5 is a heat-sensitive wire structure. In this embodiment, when the first initial wire 7.4 is the electric igniter structure, the first initial wire 7.4 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 something similar occurs, after the fire detection device detects that a high-temperature environment is generated outside because of the fire, the fire detection device sends a signal to a microprocessor. The microprocessor controls the first wire of Petition 870250085720, dated 09 / 23 / 2025, p. 12 / 57 7 / 12 ignition 7.4 to ignite the secondary gas generating agent 7.3. The second ignition wire 7.5 is a heat-sensitive wire structure. After the ignition powder 7.6 is ignited, the second ignition wire 7.5 can be directly ignited, so as to finally directly ignite the main gas generating agent 6.

[033] Preferably, the second piston 7.2 is a metallic structure. The conducting wires 7.8 are arranged on both sides of a rear end of the initial casing 7.1. The conducting wires 7.8 are connected to a feedback mechanism. In this embodiment, the feedback mechanism may employ an alarm device. When the second piston 7.2 moves in reverse to come into contact with the conducting wires 7.8, a circuit in which the feedback mechanism is located may be switched on, so that a corresponding alarm device sounds an alarm to provide a correct determination to the people. Furthermore, the second piston 7.2 in the present disclosure may move in reverse to come into contact with the conducting wires 7.8 only when the main gas-generating agent 6 is ignited and generates the gas with a reverse thrust, so that a phenomenon in which the feedback mechanism malfunctions because the main gas-generating agent 6 is not ignited and not initiated is avoided.

[034] Preferably, the main gas-generating agent 6 is disposed in an agent chamber 13. The agent chamber 13 is in communication with a front end of the initialization casing 7.1.

[035] Preferably, an insulating sealing plug 7.9 is disposed at a rear end of the induction housing 7.1. In this embodiment, the insulating sealing plug 7.9 is made of a non-metallic material, which can prevent water from entering the indirect induction structure 7, gas leakage, and short circuits. Since the volume of the indirect induction structure 7 is much smaller than the volume of the fire extinguishing device, a conventional sealing structure can effectively prevent the Petition 870250085720, dated 09 / 23 / 2025, page 13 / 57 8 / 12 impact of gas leak on the thrust of a first piston 4.

[036] Embodiment 2: The present disclosure further reveals a method of initialization for the indirect initialization mechanism for the fire extinguishing device. The initialization method includes the following steps:

[037] S1: when a fire occurs outside, the first initialization wire 7.4 ignites the secondary gas generating agent 7.3, and the secondary gas generating agent 7.3 is burned to generate gas to propel the second piston 7.2 in the starting casing 7.1 to move towards a position of the second starting wire 7.5;

[038] S2: in the process of moving the second piston 7.2, the ignition powder 7.6 generates heat by friction with the friction layer 7.7 and is ignited, and the heat generated by the ignition powder 7.6 ignites the second starting wire 7.5;

[039] S3: the second initial wire 7.5 ignites the main gas-generating agent 6; the main gas-generating agent 6 is combusted to generate gas; a portion of the gas generated by the main gas-generating agent 6 is used as a propellant source for a fire extinguishing agent in the fire extinguishing device, to spray the fire extinguishing agent and implement a fire extinguishing process; and

[040] S4: the other part of the gas generated by the main gas generating agent 6 enters inversely into the initialization casing 7.1 and inversely drives the second piston 7.2 to move towards the positions of the conducting wires 7.8, to communicate the conducting wires 7.8 with the feedback mechanism, and the feedback mechanism generates a feedback signal.

[041] Preferably, in step S3, a portion of the gas generated by the main gas-generating agent 6 propels a first piston of the fire extinguishing device to move towards a spray portion 4; and the fire extinguishing agent is compressed to be sprayed from the spray portion to implement the fire extinguishing process. In this way, the gas generated by the main gas-generating agent 6 propels the first piston to Petition 870250085720, dated 09 / 23 / 2025, page 14 / 57 9 / 12 moves, and then the first piston propels the fire extinguishing agent to be sprayed. For a specific implementation, see Modality 3 and Modality 4.

[042] Preferably, both the primary gas generating agent 6 and the secondary gas generating agent 7.3 use aerosol generating agents, and the fire extinguishing agent is a dry powder fire extinguishing agent or a water-based fire extinguishing agent or a perfluorohexanone fire extinguishing agent. After the primary gas generating agent 6 and the secondary gas generating agent 7.3 use the aerosol generating agents, a large number of aerosols or a large quantity of gas can be generated after the ignition of the aerosol generating agents, so as to provide a boost for the spraying of the fire extinguishing agent.

[043] Embodiment 3: As shown in Figures 2 to 4, the present disclosure reveals a fire extinguishing device that uses the indirect initiation mechanism described above. The fire extinguishing device includes a cylinder 1. A spray portion 3 is disposed at a front end of cylinder 1. A first piston 4 that is in sliding engagement with cylinder 1 is disposed in cylinder 1. A fire extinguishing agent 5 is disposed between the first piston 4 and the spray portion 3. A primary gas generating agent 6 and an indirect initiation mechanism 7 that cooperates with the primary gas generating agent 6 are disposed between the first piston 4 and a rear end of cylinder 1. The indirect initiation mechanism 7 includes an initiation casing 7.1. A second piston 7.2 that is in sliding engagement with the initiation casing 7.1 is disposed in the initiation casing 7.1. A secondary gas generating agent 7.3 is positioned between the second piston 7.2 and the initial casing 7.1.

[044] Preferably, the spraying portion 3 includes a front end cover 3.1 disposed at a front end of the cylinder 1. A spray orifice 3.2 is formed in the front end cover 3.1, and a nozzle membrane 3.3 is disposed at the spray orifice 3.2. A screw Petition 870250085720, dated 09 / 23 / 2025, page 15 / 57 A 10 / 12 spray head 3.4, which is threaded into the spray orifice 3.2, is arranged on one side of the nozzle membrane 3.3, and a polytetrafluoroethylene gasket 3.5 is arranged on the other side. A channel is provided inside the screw of the spray head 3.4. In the above structure, the nozzle membrane 3.3 can be mounted into the spray orifice 3.2 through the screw of the spray head 3.4, so the mounting method is simple. Meanwhile, by the arrangement of the polytetrafluoroethylene gasket 3.5, the sealing performance on the screw of the spray head 3.4 can be guaranteed. The nozzle membrane 3.3 in this embodiment can play a sealing role before the fire extinguishing device is started, to prevent the fire extinguishing agent 5 from absorbing moisture or escaping. After the fire extinguishing device is started, the nozzle membrane 3.3 is compressed to be broken, so that the fire extinguishing agent 5 is sprayed normally from the spray orifice 3.2.

[045] Preferably, the front end of cylinder 1 is threaded into the front end cover 3.1, and a rear end of cylinder 1 is threaded into the rear end cover 2. A filling hole 8 is additionally formed in the front end cover 3.1. A plug 9 that is threaded into the filling hole 8 is disposed in the filling hole 8. After the filling hole 8 is formed in the front end cover 3.1, it is convenient to fill it with fire extinguishing agent 5 after the manufacturing is complete. The plug 9 is simply unscrewed; the fire extinguishing device is filled with fire extinguishing agent 5; and then the plug 9 is assembled. The whole process improves filling efficiency.

[046] Preferably, an explosion-proof membrane 10 is disposed on a surface of the first piston 4, and a piston sealing ring 11 and a wear-resistant ring 12 are disposed between a side surface of the first piston 4 and an inner side of the cylinder 1. After the explosion-proof membrane Petition 870250085720, dated 09 / 23 / 2025, page 16 / 57 11 / 12 explosion-proof membrane 10 is provided, when the first piston 4 suddenly becomes stuck during movement, gas pressure on one side of the first piston 4 can increase dramatically. In this case, it is necessary to relieve the pressure in a timely manner, otherwise there is a risk of explosion. In this case, the explosion-proof membrane 10 can play a role in relieving the pressure. When the pressure reaches a certain value, the explosion-proof membrane 10 ruptures, so that the gas pressure is relieved from that position in a timely manner. After the piston sealing ring 11 is provided, the tightness of the first piston 4 during movement can be ensured to prevent the phenomenon of gas leakage. After the wear-resistant ring 12 (which can be made of a rigid material) is provided, the frictional force of the first piston 4 during sliding on an inner side of the cylinder 1 can be significantly reduced, which makes the first piston slide more smoothly.

[047] Modality 4: A method of extinguishing a fire using the fire extinguishing device above the present disclosure includes the following steps:

[048] S1: when a fire occurs outside, the first initial wire. 7.4 ignites the secondary gas generating agent 7.3, and the secondary gas generating agent 7.3 is burned to generate gas to propel the second piston 7.2 in the starting casing 7.1 to move towards a position of the second starting wire 7.5;

[049] S2: in the process of moving the second piston 7.2, the ignition powder 7.6 generates heat by friction with the friction layer 7.7 and is ignited, and the heat generated by the ignition powder 7.6 ignites the second starting wire 7.5;

[050] S3: the second starter wire 7.5 ignites the main gas-generating agent 6; the main gas-generating agent 6 is combusted to generate gas; a portion of the gas generated by the main gas-generating agent 6 propels the first piston 4 to move towards the spraying portion 3, and the fire-extinguishing agent 5 is compressed to be sprayed from the spraying portion 3 to implement a fire extinguishing process; and

[051] S4: the other part of the gas generated by the main gas generating agent 6 Petition 870250085720, dated 09 / 23 / 2025, page 17 / 57 12 / 12 enters the initialization casing 7.1 in reverse and drives the second piston 7.2 in reverse to move towards the positions of the lead wires 7.8, to communicate the lead wires 7.8 with the feedback mechanism, and the feedback mechanism generates a feedback signal.

[052] The embodiments above are merely preferred solutions of the technique of the present disclosure and should not be considered as a limitation to the present disclosure. The embodiments and the features in the embodiments of the present disclosure may be freely combined with each other without conflict. The scope of protection of the present disclosure shall be the solutions of the technique described in the claims, and equivalent replacement solutions, which include the features of the technique of the solutions of the technique described in the claims, shall be covered by the scope of protection. That is, equivalent replacements and improvements within this scope also fall within the scope of protection of the present disclosure. Petition 870250085720, dated 09 / 23 / 2025, page 18 / 57

Claims

1 / 3 CLAIMS 1. INDIRECT INITIALIZATION MECHANISM FOR A FIRE EXTINGUISHING DEVICE characterized by comprising an indirect initialization mechanism (7) cooperating with a primary gas generating agent (6), wherein the indirect initialization mechanism (7) comprises an initialization housing (7.1); a second piston (7.2) that is slidingly fitted with the initialization housing (7.1) is disposed in the initialization housing (7.1); and a secondary gas generating agent (7.3) is disposed between the second piston (7.2) and the initialization housing (7.1).

2. INDIRECT INITIALIZATION MECHANISM FOR A FIRE EXTINGUISHING DEVICE, according to claim 1, characterized in that the secondary gas generating agent (7.3) is in contact with one end of a first initialization wire (7.4), and a second initialization wire (7.5) is disposed between the second plunger (7.2) and the main gas generating agent (6).

3. INDIRECT INITIALIZATION MECHANISM FOR A FIRE EXTINGUISHING DEVICE, according to claim 2, characterized in that the ignition powder (7.6) is disposed in a side portion or on top of the second piston (7.2), and a friction layer (7.7) is disposed in an inner wall of the initialization casing (7.1).

4. INDIRECT INITIALIZATION MECHANISM FOR A FIRE EXTINGUISHING DEVICE, according to claim 2, characterized in that the first initialization wire (7.4) is an electrical ignition structure and the second initialization wire (7.5) is a heat-sensitive wire structure.

5. INDIRECT INITIALIZATION MECHANISM FOR A FIRE EXTINGUISHING DEVICE, according to claim 2, characterized in that the second piston (7.2) is a metallic structure; conductive wires (7.8) are arranged on two sides of a rear end of the initialization casing (7.1); and the conductive wires (7.8) are connected to a feedback mechanism. Petition 870250085720, dated 09 / 23 / 2025, p. 19 / 57 2 / 3 6. INDIRECT INITIALIZATION MECHANISM FOR A FIRE EXTINGUISHING DEVICE, according to claim 2, characterized in that the main gas generating agent (6) is disposed in an agent chamber (13); and the agent chamber (13) is in communication with a front end of the initialization casing (7.1).

7. INDIRECT INITIALIZATION MECHANISM FOR A FIRE EXTINGUISHING DEVICE, according to claim 1, characterized in that an insulating sealing plug (7.9) is additionally disposed at a rear end of the initialization housing (7.1).

8. INITIALIZATION METHOD FOR THE INDIRECT INITIALIZATION MECHANISM FOR THE FIRE EXTINGUISHING DEVICE, as defined in any one of claims 1 to 7, wherein the initialization method is characterized by comprising the following steps: S1: when a fire occurs outside, the first initialization wire (7.4) ignites the secondary gas generating agent (7.3), and the secondary gas generating agent (7.3) is burned to generate gas to propel the second piston (7.2) in the initialization housing (7.1) to move towards a position of the second initialization wire (7.5); S2: in the process of moving the second piston (7.2), the ignition powder (7.6) generates heat by friction with the friction layer (7.7) and is ignited, and the heat generated by the ignition powder (7.6) ignites the second initialization wire (7.5); S3: the second initialization wire (7.5) ignites the main gas generating agent (6); the main gas generating agent (6) is combusted to generate gas; a portion of the gas generated by the main gas generating agent (6) is used as a propulsion source for a fire extinguishing agent in the fire extinguishing device, to spray the fire extinguishing agent and implement a fire extinguishing process; and S4: the other portion of the gas generated by the main gas generating agent (6) enters the initialization casing (7.1) inversely and drives the second piston (7.2) in reverse to move towards the positions of the conducting wires (7.8), to communicate the conducting wires (7.8) with the feedback mechanism, and the feedback mechanism generates a feedback signal.

9. INITIALIZATION METHOD FOR THE INDIRECT INITIALIZATION MECHANISM FOR THE FIRE EXTINGUISHING DEVICE, according to claim 8, characterized in that, in step S3, a portion of the gas generated by the main gas generating agent (6) drives a first piston (4) of the fire extinguishing device to move towards a spray portion; and the fire extinguishing agent is compressed to be sprayed out of the spray portion to implement the fire extinguishing process.

10. INITIALIZATION METHOD FOR THE INDIRECT INITIALIZATION MECHANISM FOR THE FIRE EXTINGUISHING DEVICE, according to claim 9, characterized in that both the primary gas generating agent (6) and the secondary gas generating agent (7.3) use aerosol generators, and the fire extinguishing agent is a dry powder fire extinguishing agent or a water-based fire extinguishing agent or a perfluorohexanone fire extinguishing agent. Petition 870250085720, dated 09 / 23 / 2025, p. 21 / 57

Images