Thermosensitive starting gas generator

Abstract

The utility model relates to a thermosensitive starting gas generator which comprises a combustion chamber, an end cover and a thermosensitive starter, ignition powder and gas generating powder are arranged in the combustion chamber, the thermosensitive starter is arranged on the end cover and provided with a base, an upper cavity and a lower cavity are arranged in the base, and a waterproof cover is arranged on the top of the upper cavity. The waterproof cover comprises a shell, a clamping jaw and a rubber cap, a lacing hole is formed in the waterproof cover, the temperature sensing thermosensitive wire penetrates through the lacing hole to stretch into the upper cavity, the upper cavity is communicated with the lower cavity through the fire guide hole, the fire guide hole is covered with the diaphragm, the lower cavity is internally provided with an elastic plugging piece, and the elastic plugging piece abuts against the temperature sensing ignition powder block to the lower portion of the fire guide hole. A temperature sensing ignition powder column is arranged on the outer side of the elastic plugging piece, a wire passing hole is formed in the bottom of the lower cavity, the elastic plugging piece extends downwards to form a starting thermosensitive wire, and the starting thermosensitive wire penetrates through the wire passing hole to be connected with ignition powder. The device isolates an external humid and hot environment, prevents internal thermosensitive lines and medicaments from being affected with damp and losing efficacy, and improves the stability and the reliability of the device.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguishing equipment control, specifically to a thermosensitive start-up gas generator. Background Technology

[0002] Fire detectors in the fire protection field are classified into five main categories based on their technical application: smoke detectors, heat detectors, light detectors, gas detectors, and composite detectors. Among them, heat-sensitive self-starting gas output devices are the most widely used. Chinese patent CN201721339997.9 discloses an environmentally friendly aerosol automatic fire extinguishing device, including a device housing, nozzle, extinguishing agent, reaction chamber, automatic start device, and cooling device. The reaction chamber is located inside the housing and contains the extinguishing agent. The cooling device is located on top of the reaction chamber and includes a metal filter, a flame arrestor plate, a chemical coolant layer, and a physical ball cooling layer arranged sequentially from bottom to top. This patent has a good cooling effect, minimizing the temperature of the aerosol nozzle and overcoming the drawback of flame emission, thus preventing secondary hazards that may occur during the aerosol fire extinguishing process. However, one end of its heat-sensitive wire is located outside the housing, while the other end passes through a conduit and extends into the extinguishing agent. The heat-sensitive wire hole is connected to the outside environment, making it difficult for the fire extinguishing device to pass environmental tests such as damp heat and aging. Utility Model Content

[0003] To address the technical problem of thermally sensitive start-up gas generators failing environmental tests such as damp heat and aging, this invention provides a thermally sensitive start-up gas generator. A thermally sensitive starter is mounted on an end cap, and a waterproof cover is provided on the thermally sensitive starter. The waterproof cover has a clamping hole, forming a sealed space between the thermally sensitive starter, the end cap, and the combustion chamber. This device can isolate the external damp heat environment, preventing the internal thermal wire and reagent from becoming damp and failing, thus improving the stability and reliability of the device.

[0004] The objective of this utility model is achieved through the following technical solution: A thermosensitive starting gas generator includes a combustion chamber, an end cap, and a thermosensitive starter. The combustion chamber contains an ignition propellant and a gas-generating propellant. The thermosensitive starter is mounted on the end cap and has a base. The base contains an upper chamber and a lower chamber. The top of the upper chamber is provided with a waterproof cover, which includes an outer shell, a claw, and a rubber cap. The waterproof cover has a tightening hole, through which a temperature-sensitive thermocouple extends into the upper chamber. The upper chamber is connected to the lower chamber through a ignition hole, which is covered with a diaphragm. The lower chamber contains an elastic sealing element that holds the temperature-sensitive ignition propellant block against the ignition hole. A temperature-sensitive ignition propellant column is located on the outside of the elastic sealing element. The bottom of the lower chamber has a wire hole, through which a starting thermosensitive wire extends downward from the elastic sealing element and passes through the wire hole to connect with the ignition propellant.

[0005] In a preferred embodiment, the resilient sealing element includes a plug and a spring.

[0006] In a preferred embodiment, the side of the block is provided with a plurality of grooves, and the grooves form a through hole with the inner wall of the lower chamber.

[0007] In a preferred embodiment, the top surface of the block is spherical.

[0008] In a preferred embodiment, a filter screen is provided on the inner wall of the combustion chamber, an air outlet is provided on the side wall of the combustion chamber, and a sealing ring is provided on the outer side of the air outlet.

[0009] In a preferred embodiment, the upper end of the gas-generating agent is provided with a combustion-supporting groove, and the ignition agent is disposed in the combustion-supporting groove.

[0010] In a preferred embodiment, the end cap is provided with a flange.

[0011] In a preferred embodiment, the thermal starter is threadedly connected to the end cap, and a sealing ring is provided between the thermal starter and the end cap.

[0012] In a preferred embodiment, the end cap is threadedly connected to the combustion chamber, and a sealing ring is provided between the end cap and the combustion chamber.

[0013] This utility model has the following advantages compared with the prior art:

[0014] This invention features a thermal starter mounted on an end cap, with a waterproof cover containing a tightening hole. After the temperature-sensing thermal wire is inserted, the hole is tightened, creating a sealed space between the thermal starter, the end cap, and the combustion chamber. This device isolates the device from external humid and hot environments, facilitating testing under conditions of humidity, heat, and aging. It also prevents the internal thermal wire and reagents from becoming damp and malfunctioning, thus improving the stability and reliability of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the component structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the thermal starter in this utility model;

[0018] Reference numerals: 11-Temperature-sensing thermistor; 13-Diaphragm; 14-Base; 15-First sealing ring; 21-Temperature-sensing ignition block; 22-Block; 23-Temperature-sensing ignition charge; 24-Spring; 25-Wire hole; 26-Starting thermistor; 31-End cap; 32-Second sealing ring; 33-Sealing ring; 34-Ignition charge; 35-Gas-generating charge; 36-Filter screen; 37-Combustion chamber; 121-Outer shell; 122-Claw; 123-Plastic cap. Detailed Implementation

[0019] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to exemplarily illustrate the principles of this utility model, but should not be used to limit the scope of this utility model. That is, this utility model is not limited to the described preferred embodiments, and the scope of this utility model is defined by the claims.

[0020] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance; those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Example 1

[0022] See Figure 1 , Figure 2 This embodiment provides a thermally sensitive starting gas generator, hereinafter referred to as "this device," which includes a combustion chamber 37, an end cap 31, and a thermally sensitive starter. The combustion chamber 37 contains an ignition propellant 34 and a gas-generating propellant 35. The thermally sensitive starter is mounted on the end cap 31 and has a base 14. The base 14 has an upper chamber and a lower chamber inside. The top of the upper chamber is provided with a waterproof cover, which includes a housing 121, a claw 122, and a rubber cap 123. The waterproof cover has a tightening hole. The temperature-sensitive thermal wire 11 passes through the tightening hole and extends into the upper chamber. The upper chamber is connected to the lower chamber through the ignition hole. The ignition hole is covered with a diaphragm 13. An elastic sealing element is provided in the lower chamber. The elastic sealing element holds the temperature-sensitive ignition block 21 against the bottom of the ignition hole. A temperature-sensitive ignition column 23 is provided on the outside of the elastic sealing element. A wire hole 25 is provided at the bottom of the lower chamber. An activation thermal wire 26 extends downward from the elastic sealing element. The activation thermal wire 26 passes through the wire hole 25 and connects to the ignition charge 34.

[0023] See Figure 2 , Figure 3In this embodiment, the waterproof cover includes a housing 121, a claw 122, and a cap 123. The housing 121 has an internal thread, and the upper part of the base 14 has an external thread, with the housing 121 and the base 14 being threadedly connected. The upper part of the cap 123 has a tightening hole for inserting a temperature-sensitive thermal wire 11. One end of the temperature-sensitive thermal wire 11 passes through the housing 121 and the tightening hole in sequence and extends into the inside of the cap 123. As the housing 121 is tightly connected to the base 14, the claw 122 retracts inward to squeeze the upper part of the cap 123, and the tightening hole clamps the temperature-sensitive thermal wire 11, forming a sealed space between the thermal starter, the end cap 31, and the combustion chamber 37. This isolates the external humid and hot environment, prevents the internal thermal wire and reagent from becoming damp and failing, and improves the stability and reliability of the device.

[0024] See Figure 3 When a fire occurs near this device, the temperature rises to the ignition point of the temperature-sensitive thermal wire 11. The thermal wire 11 burns from the outside in, and the high temperature generated can rupture the diaphragm 13 and ignite the temperature-sensitive ignition block 21. The diaphragm 13 can be a circular aluminum foil sheet. After the temperature-sensitive ignition block 21 burns out, the elastic sealing element seals the ignition hole, isolating the upper chamber from the lower chamber. The combustion of the temperature-sensitive ignition block 21 raises the temperature of the lower chamber, igniting the temperature-sensitive ignition column 23. The temperature-sensitive ignition column 23 ignites the activation thermal wire 26, which ignites the ignition charge 34. The ignition charge 34 ignites the gas-generating charge 35. The combustion of the ignition charge 34 and the gas-generating charge 35 produces a large amount of high-pressure gas. The high-pressure gas output is used to activate the fire extinguishing device to spray the extinguishing agent.

[0025] In this embodiment, the elastic sealing element includes a plug 22 and a spring 24. The spring 24 is installed in the central hole of the temperature-sensing ignition charge 23. The spring 24 is in a compressed state, with its lower end abutting against the bottom plate of the lower chamber and its upper end abutting against the bottom surface of the plug 22. The diameter of the plug 22 is larger than the inner diameter of the ignition hole and slightly smaller than the inner diameter of the lower chamber.

[0026] In this embodiment, the side of the plug 22 has three grooves, which together with the inner wall of the lower chamber form a through hole. The through hole is used to quickly conduct the heat generated by the combustion of the temperature-sensing ignition block 21 to the temperature-sensing ignition column 23. The temperature-sensing ignition can spontaneously combust within a set temperature range.

[0027] In this embodiment, the ignition propellant is a high-burning-rate solid propellant, and the gas-generating propellant is a low-burning-rate solid propellant. Both the ignition propellant and the gas-generating propellant can be aerospace-grade composite solid propellants.

[0028] In this embodiment, the top surface of the plug 22 is spherical. The spherical surface can better fit with the ignition hole, resulting in a better sealing effect.

[0029] See Figure 1In this embodiment, a filter screen 36 is provided on the inner wall of the combustion chamber 37, and an outlet is provided on the side wall of the combustion chamber 37. A sealing ring 33 is provided on the outer side of the outlet. The filter screen 36 can filter impurities in the combustion gas and reduce the gas temperature. The outlet is used to discharge high-pressure gas. The sealing ring 33 is fitted onto the outer wall of the combustion chamber to seal the outlet and prevent the agent in the combustion chamber from getting damp. High-pressure gas can break through the sealing ring 33 sealing the outlet. The sealing ring 33 can be a ring-shaped aluminum foil.

[0030] In this embodiment, the upper end of the gas-generating agent 35 is provided with a combustion-supporting groove, and the ignition agent 34 is disposed in the combustion-supporting groove. The ignition agent 34 has a larger contact surface with the gas-generating agent, which is more conducive to the rapid and complete ignition of the gas-generating agent.

[0031] In this embodiment, a flange is provided on the end cover 31. The flange is used for mounting and fixing the device.

[0032] In this embodiment, the thermal starter is threadedly connected to the end cover 31, and a first sealing ring 15 is provided between the thermal starter and the end cover 31. This facilitates the quick assembly and disassembly of the device.

[0033] In this embodiment, the end cap 31 is threadedly connected to the combustion chamber 37, and a second sealing ring 32 is provided between the end cap 31 and the combustion chamber 37.

[0034] In this embodiment, the base 14 has a bottom plate at its bottom end, the wire hole 25 is located in the middle of the bottom plate, and the bottom plate is fixed by edge sealing.

[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A thermosensitive starter gas generator, comprising a combustion chamber (37), an end cap (31), and a thermosensitive starter, wherein the combustion chamber (37) contains an ignition propellant (34) and a gas-generating propellant (35), and the thermosensitive starter is disposed on the end cap (31), characterized in that: The thermal starter is provided with a base (14). The base (14) has an upper chamber and a lower chamber inside. The top of the upper chamber is provided with a waterproof cover. The waterproof cover includes an outer shell (121), a claw (122), and a rubber cap (123). The waterproof cover is provided with a tightening hole. The temperature-sensitive thermal wire (11) passes through the tightening hole and extends into the upper chamber. The upper chamber is connected to the lower chamber through a ignition hole. The ignition hole is covered with a diaphragm (13). The lower chamber is provided with an elastic sealing member. The elastic sealing member holds the temperature-sensitive ignition block (21) against the bottom of the ignition hole. The outer side of the elastic sealing member is provided with a temperature-sensitive ignition column (23). The bottom of the lower chamber is provided with a wire hole (25). The elastic sealing member extends downward with a starting thermal wire (26). The starting thermal wire (26) passes through the wire hole (25) and connects to the ignition charge (34).

2. The thermally sensitive start-up gas generator according to claim 1, characterized in that: The resilient sealing element includes a plug (22) and a spring (24).

3. A thermally sensitive start-up gas generator according to claim 2, characterized in that: The side of the block (22) is provided with multiple grooves, and the grooves form a through hole with the inner wall of the lower chamber.

4. A thermally sensitive start-up gas generator according to claim 2, characterized in that: The top surface of the block (22) is spherical.

5. A thermally sensitive start-up gas generator according to claim 1, characterized in that: The combustion chamber (37) has a filter screen (36) on its inner wall and an air outlet on its side wall. A sealing ring (33) is provided on the outside of the air outlet.

6. A thermally sensitive start-up gas generator according to claim 1, characterized in that: The upper end of the gas-generating agent (35) is provided with a combustion-supporting groove, and the ignition agent (34) is placed in the combustion-supporting groove.

7. A thermally sensitive start-up gas generator according to claim 1, characterized in that: The end cap (31) is provided with a flange.

8. A thermally sensitive start-up gas generator according to claim 1, characterized in that: The thermal starter is threadedly connected to the end cap (31), and a first sealing ring (15) is provided between the thermal starter and the end cap (31).

9. A thermally sensitive start-up gas generator according to claim 1, characterized in that: The end cap (31) is threadedly connected to the combustion chamber (37), and a second sealing ring (32) is provided between the end cap (31) and the combustion chamber (37).

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