Non-electric fire extinguishing system without pressure storage

Abstract

Non-electric, automatic fire extinguishing system without pressure storage, characterized in that: it comprises a gas source for temperature sensing (1), a pneumatic pipeline (2), a pneumatic starter (3), a gas generator (4), a reservoir for fire extinguishing agent (5) and a pipeline for spraying (6); the gas source for temperature detection (1), the pneumatic pipeline (2), the pneumatic starter (3) and the gas generator (4) are connected in sequence; the storage container for fire extinguishing agent (5) comprises a first outlet and a second outlet; the gas generator (4) is connected to the first outlet of the storage container for fire extinguishing agent (5) and the pipeline for spraying (6) is connected to the second outlet of the storage container for fire extinguishing agent (5); the gas source for temperature detection (1) is set up to detect the ambient temperature and to generate gas; the pneumatic pipeline (2) is designed to convey the gas generated by the gas source for temperature detection (1) to the pneumatic starter (3) and to trigger the operation of the pneumatic starter (3) by the conveyed gas pressure; the pneumatic starter (3) is designed to ignite the gas generator (4) during operation; the gas generator (4) is designed to generate gas to drive the injection of an extinguishing agent into the storage container for fire extinguishing agent via the pipeline to the injection (6).

Description

TECHNICAL AREA

[0001] The invention belongs to the field of fire protection and relates in particular to a non-electric, automatic fire extinguishing system without pressure storage. STATE OF THE ART

[0002] The feedback phase of existing fire extinguishing systems in the area of ​​fire protection has an increased need for support in terms of power supply, such as ultraviolet, infrared, smoke sensors, etc.

[0003] DE112012003521T5 relates to a fire extinguishing system that is particularly useful for extinguishing fires that occur in the engine compartment of a vehicle, preferably a bus. Specifically, the invention dispenses a powdered fire extinguishing agent under a high-pressure airflow to extinguish fires in confined spaces, such as engine compartments.

[0004] EP1782861A1 discloses a device for extinguishing a fire, comprising a container with an extinguishing agent and a pressure generator for ejecting the agent from the container.

[0005] US20130048316A1 discloses an extinguishing device comprising an extinguishing device container with extinguishing agent, means for generating a pressurized gas, connecting means for connecting the container to the means for generating the gas, and a heat-resistant separating element positioned between the connecting means and the extinguishing agent.

[0006] CN109675226A concerns the field of explosion-proof fire extinguishing technology for vehicles and describes in particular a type of explosion-proof automatic fire extinguishing system for vehicles.

[0007] The extinguishing agent is often stored in pressurised cylinders, such as heptafluoropropane gas cylinders, inert gas cylinders, etc. However, a large number of applications have presented some problems with existing fire extinguishing systems, such as: (1) The electrical feedback system will fail in the event of a power outage caused by a fire that destroys the power supply equipment. (2) After long-term storage, a pressure drop occurs in the heptafluoropropane cylinder of the heptafluoropropane fire extinguishing system and maintenance is required after approximately 5 years; furthermore, the high-pressure gas cylinder itself is dangerous. (3) The fire extinguishing system which uses the built-in or external carbon dioxide gas cylinder as a propulsion source to spray out a fire extinguishing agent cannot function in winter due to the phase change at low temperatures and is not suitable for use in low-temperature outdoor environments. (4) In the case of a pipe network system used in an underground car park for spraying, which is activated by the glass bubble for temperature sensing, the problem is insufficient pressure in the pipeline or a water leak. (5) In a fire extinguishing system that uses a fusible alloy such as Wood's alloy as the temperature sensing element and a spring-rope activation method to activate a fire extinguisher, such as an automatic kitchen fire extinguishing system, the problem of a slow response to fire arises; furthermore, due to the limited spring elasticity and rope length, the temperature sensing element and a reservoir for fire extinguishing agent cannot be located too far apart, resulting in a very limited range of the fire extinguishing system. SUMMARY OF THE INVENTION

[0008] Based on the technical disadvantages of the prior art, the present invention aims to provide a non-electrical fire extinguishing system without pressure storage, which eliminates the technical defects of the limitation of the power supply and the long transmission distance of the feedback signal, can be used in outdoor environments with low temperatures and can be maintenance-free in the long term, and can be widely used in fire extinguishing in warehouses, electrical installations, ships, technical vehicles, etc.

[0009] As a technical solution, the present invention proposes a non-electrical, automatic fire extinguishing system without pressure storage, comprising a gas source for temperature sensing, a pneumatic pipeline, a pneumatic starter, a gas generator, a reservoir for extinguishing agent, and a spray pipeline; the gas source for temperature sensing, the pneumatic pipeline, the pneumatic starter, and the gas generator are connected in series; the reservoir for extinguishing agent comprises a first opening and a second opening, and the gas generator is connected to the first opening of the reservoir for extinguishing agent, and the spray pipeline is connected to the second opening of the reservoir for extinguishing agent; the gas source for temperature sensing is configured to sense the ambient temperature and generate gas;The pneumatic pipeline is designed to convey the gas generated by the gas source for temperature detection to the pneumatic starter, and the pressure of the conveyed gas triggers the operation of the pneumatic starter; the pneumatic starter is designed to ignite the gas generator during operation; the gas generator is designed to generate gas to drive the spraying of an extinguishing agent from the fire extinguishing agent reservoir via the spraying pipeline.

[0010] Furthermore, the gas source for temperature sensing described above comprises a glass bulb for temperature sensing for fire protection, a first spring, a first firing pin, a first piercing primer, a first compound solid propellant, and a coupling mechanism; the compound solid propellant is installed in a housing, the first compound solid propellant at the bottom of the housing is connected to one end of the first piercing primer so that it is ignited by the first piercing primer, and an opening for connection to the pneumatic piping is provided at the top of the housing;the first firing pin is located at the other end of the first piercing primer and is situated at a predetermined distance from the lower end of the first piercing primer, and the first firing pin strikes the first piercing primer by means of the stroke motion to cause the first piercing primer to produce flames, and the first piercing primer ignites the first compound solid propellant in the casing upon impact of the first firing pin;The coupling mechanism connects the first firing pin, the glass bulb for temperature sensing for fire protection, and the first spring. When the coupling mechanism connects to the glass bulb for temperature sensing for fire protection, it causes the first spring to exert a compressive force. This force is released when the glass bulb for temperature sensing for fire protection bursts due to heat, driving the coupling mechanism into motion. This, in turn, drives the first firing pin connected to it, thus generating a striking force on the first piercing percussion cap.

[0011] The specific embodiment of the gas source for temperature sensing of the present invention can preferably be implemented by the following approaches: further comprising a second housing and an end cap; the coupling mechanism is a cross-shaped connecting structure formed by a transverse bar and a vertical bar; the first firing pin comprises an upper end located near the first piercing primer and a connecting base; one end of the transverse bar is guided perpendicularly through the connecting base of the first firing pin, and the other end is guided perpendicularly through the center of the vertical bar and is rigidly connected to the vertical bar to form a connecting section; the second housing is configured to connect the vertical bar of the coupling mechanism, the first spring, and the glass bulb for temperature sensing for fire protection in the same direction parallel to the direction of the first firing pin;One end of the vertical rod, aligned in the same direction as the firing pin, is connected to the glass bulb for fire protection temperature sensing, and the other end of the glass bulb for fire protection temperature sensing is attached to the second housing; the first spring is attached to the other end of the vertical rod, and a through-hole is provided at the other end of the second housing, through which the end cap is firmly connected from the outside of the second housing for attaching the first spring to the vertical rod between the second housing and the connecting section; when the vertical rod of the coupling mechanism, the first spring, and the glass bulb for fire protection temperature sensing are installed in the second housing, the two ends of the second housing are each connected to the glass bulb for fire protection temperature sensing and the end cap, and the first spring is in a compressed state;The height to which the first spring is compressed is greater than the predetermined distance between the striking end of the first firing pin and the striking end of the first piercing percussion cap.

[0012] Furthermore, the spring constant of the spring described above is 2-15 N / mm and the height to which the spring is compressed is 5-20 mm; the nominal activation temperature of the glass bubble for temperature sensing for fire protection is any one of 93 °C, 141 °C or 182 °C.

[0013] Furthermore, the first compound solid propellant described above comprises an adhesive, a curing agent, an oxidizing agent, and a coolant; the adhesive is a hydroxyl-terminated polybutadiene and / or a carboxyl-terminated polybutadiene, and the content is 10-40 wt%; the curing agent is a toluene diisocyanate and / or an isophorone diisocyanate, and the content is 0.5-5 wt%; the oxidizing agent is an ammonium perchlorate and / or an ammonium nitrate, and the content is 20-60 wt%; the coolant is an azodicarbonamide, and the content is 20-60 wt%.

[0014] Furthermore, the pneumatic starter described above comprises a piston, a connecting rod, a second piercing primer, a retractable pin, a second spring, a second piercing primer, a second firing pin, and a pressure cap; the movable end face of the piston faces the gas outlet of the pneumatic pipeline to receive the gas pressure from the pneumatic pipeline and to move under the influence of the gas pressure; one end of the connecting rod is connected to and attached to the piston to move with the piston, and the other end is connected to the retractable pin; the retractable pin is aligned parallel to the direction of movement of the piston, with one end of the retractable pin connected to the connecting rod and another end connected to the second firing pin;The second firing pin comprises a base and a spring sleeve rod on the base; the tip of the firing pin is located on the outside of the base; the inside of the base is connected to the spring sleeve rod; and the end section of the spring sleeve rod facing away from the base is provided with a transverse hole to be connected to the extendable pin; the outer circumference of the base is larger than the outer circumference of the second spring, and the outer circumference of the spring sleeve rod is smaller than the inner circumference of the second spring; the pressure cap is a hollow structure with openings at both ends, the outer circumference of the opening at one end of the pressure cap being between the outer circumference of the second spring and the outer circumference of the spring sleeve rod, and the outer circumference of the opening at the other end being larger than the outer circumference of the base of the second firing pin and fitting the outer circumference of the second piercing primer;When the second spring is attached to the outside of the spring sleeve rod of the second firing pin and the spring sleeve rod is passed through the hollow section of the pressure cap to connect its transverse hole with the extendable pin, the second spring is fixed in the compressed state within the pressure cap; the second piercing primer is attached to an end of the pressure cap close to the base of the second firing pin, and the distance from the second piercing primer to the tip of the firing pin at the base of the second firing pin is no greater than the height by which the second spring is compressed; the ignition end of the second piercing primer is connected to the gas generator; the distance between the second firing pin and the second piercing primer in the direction of the needle tip of the second firing pin is no greater than the height by which the second spring is compressed;The connecting rod moves synchronously with the movement of the piston under the influence of gas, so that the extendable pin is pulled out of the transverse hole on the spring sleeve rod of the second firing pin, thus releasing the compression of the second spring in the pressure cap, causing the second firing pin to strike the second piercing primer to generate gas in the gas generator.

[0015] Furthermore, the cross-sectional area of ​​the piston described above is no less than 4 times the venting cross-sectional area of ​​the pneumatic pipeline.

[0016] Furthermore, the gas generator described above comprises a second compound solid propellant, and the second compound solid propellant comprises an adhesive, a curing agent, an oxidizing agent, a coolant, and a stabilizer; wherein the adhesive is a polyethylene glycol, a polyethylene adipate, or a polycaprolactone, or a combination thereof, and the content is 10-40 wt%; the curing agent is a toluene diisocyanate and / or an isophorone diisocyanate, and the content is 0.5-5 wt%; the oxidizing agent is an ammonium perchlorate and / or an ammonium nitrate, and the content is 20-60 wt%; the coolant is an azodicarbonamide and / or a dihydroxyglyoxime, and the content is 20-60 wt%; the stabilizer is 2-nitrodiphenylamine and / or 4-nitroaniline, and the content is 0.5-5 wt%.

[0017] Furthermore, the outer diameter of the pneumatic pipeline is no more than 6 mm and the inner diameter is no more than 4 mm, and the pneumatic pipeline is connected to the gas source for temperature sensing and / or the pneumatic starter by means of a clamping ring connection and / or welding.

[0018] Furthermore, the pneumatic starter described above is arranged on the outside of the first opening of the fire extinguishing agent reservoir, and the gas generator is arranged on the inside of the first opening of the fire extinguishing agent reservoir.

[0019] Furthermore, the pneumatic starter and the gas generator described above are both arranged on the outside of the first opening of the fire extinguishing agent reservoir, and the opening of the gas generator is connected to the first opening of the fire extinguishing agent reservoir.

[0020] The principle of the invention consists in the fact that, after baking by fire, the gas source for temperature sensing generates a gas at a certain pressure, the gas is directed through the pneumatic pipeline to the pneumatic starter, the gas drives the piston in the pneumatic starter to move, thereby activating the gas generator, and after the ignition of the chemicals in the gas generator to drive the injection of a fire extinguishing agent into the reservoir for fire extinguishing agent via the pipeline, a gas at a certain pressure is generated to inject the fire extinguishing agent into the fire point.

[0021] It is evident that the gas produced by the gas source for temperature sensing is obtained by a chemical reaction of the first compound solid propellant, and that its basic composition is nitrogen or carbon dioxide, or a combination thereof; the critical temperature of the first compound solid propellant for thermal auto-ignition is not less than 150 °C; the gas produced by the gas generator is obtained by the chemical reaction of the second compound solid propellant, and that its basic composition is nitrogen, carbon dioxide, or water vapor, or a combination of more than two thereof.

[0022] The material of the pneumatic piping is stainless steel, copper or copper alloys or a combination of more than two of these, and the type of connection to other components is compression fitting or welding or a combination thereof.

[0023] The present invention has the following advantages and beneficial effects compared to the prior art: (1) The entire system does not require a power supply, thus avoiding the potential risk of a system crash due to a fire causing the power supply lines to burn out; (2) The effective transmission distance of a pneumatic pipeline is long, and the pneumatic pipeline can be easily bent if necessary without affecting the transmission of propellant gas. Even with just 5 g of gas-generating chemicals (gas production rate of 400 L / kg) at the end for the gas source for temperature sensing, a 150 m long stainless steel pipeline with a 4 mm inner diameter can smoothly activate the pneumatic starter at the other end of the pipeline. (3) Maintenance-free operation over a long period. This is because both the compound solid propellant in the temperature-sensing gas source and the compound solid propellant in the gas generator of the fire extinguishing agent reservoir can achieve a service life of over 10 years. The reservoir body is of the non-pressurized storage type, and the entire system is not pressurized, so under normal circumstances, leakage of extinguishing agent during prolonged storage is virtually impossible. (4) Use in low-temperature outdoor environments is possible. The use of special low-temperature resistant chemicals in the compound solid propellants and a low-temperature resistant fire extinguishing agent enables the use of this system in an outdoor environment of -40°C. Description of the drawings

[0024] These and / or other aspects and advantages of the present invention will become clearer and easier to understand from the following detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, which show: Fig. 1 a schematic representation of the structural design of a non-electric fire extinguishing system without pressure storage according to an embodiment of the present invention; wherein: 1-gas source for temperature detection, 2-pneumatic pipeline, 3-pneumatic starter, 4-gas generator, 5-storage container for fire extinguishing agent, 6-pipeline for spraying; Fig. 2-3 schematic external views of a storage container for fire extinguishing agent and a pneumatic starter and a gas generator of the structure for a non-electric fire extinguishing system without pressure storage according to an embodiment of the present invention; Fig.4-5 schematic structural representations of a gas source for temperature measurement according to an embodiment of the present invention; wherein: 11-glass bubble for temperature sensing for fire protection; 12-first spring; 13-first firing pin; 14-first piercing primer; 15-first compound solid propellant; 16-coupling mechanism; Fig. 6-7 schematic structural representations of a pneumatic starter according to an embodiment of the present invention; wherein: 31-piston, 32-connecting rod, 33-extendable pin, 34-second spring, 35-second piercing primer, 36-second firing pin, 37-pressure cap. Detailed descriptions

[0025] To make the present invention more understandable to those skilled in the art, the present invention is described in more detail below with reference to the accompanying drawings and detailed embodiments. Example 1

[0026] A non-electric, automatic fire extinguishing system without pressure storage, the general structure of which is Fig.Figure 1 shows a gas source for temperature sensing 1, a pneumatic pipeline 2, a pneumatic starter 3, a gas generator 4, a reservoir for extinguishing agent 5, and a pipeline for spraying 6. It is evident that the gas source for temperature sensing 1, the pneumatic pipeline 2, the pneumatic starter 3, and the gas generator 4 are connected in series. The reservoir for extinguishing agent 5 comprises a first outlet and a second outlet. The gas generator 4 is connected to the first outlet of the reservoir for extinguishing agent 5, and the pipeline for spraying 6 is connected to the second outlet of the reservoir for extinguishing agent 5. The general operation of the various parts is that a gas source for temperature sensing 1 is configured to sense the ambient temperature and generate gas.The pneumatic pipeline 2 is configured to convey the gas generated by the gas source for temperature detection 1 to the pneumatic starter 3, and the pressure of the conveyed gas triggers the operation of the pneumatic starter 3; the pneumatic starter 3 is configured to ignite the gas generator 4 during operation; the gas generator 4 is configured to generate gas to drive the injection of an extinguishing agent from the storage container for fire extinguishing agent 5 via the pipeline to the injection point 6. Fig. 2 and Fig. Figure 3 shows the external views of the storage container for fire extinguishing agent 5 and the gas generator in conjunction with the storage container for fire extinguishing agent 5.

[0027] The preferred design and structure of various parts are as follows: The gas source for temperature measurement 1, whose structure in Fig.Figure 4 shows a glass bladder for temperature sensing for fire protection 11, a first spring 12, a first firing pin 13, a first piercing primer 14, a first compound solid propellant 15 and a coupling mechanism 16; the first compound solid propellant 15 is installed in the housing, the first compound solid propellant 15 located at the bottom of the housing is connected to one end of the first piercing primer 14 so that it is ignited by the first piercing primer 14, and an opening for connection to the pneumatic piping 2 is provided at the top of the housing;the first firing pin 13 is located at the other end of the first piercing primer 14 and is at a predetermined distance from the lower end of the first piercing primer 14, and the first firing pin 13 strikes the first piercing primer 14 by the stroke movement to cause the first piercing primer 14 to produce flames, and the first piercing primer 14 ignites the first compound solid propellant 15 in the housing upon impact of the first firing pin 13;The coupling mechanism 16 connects the first firing pin 13, the glass bulb for temperature sensing for fire protection 11, and the first spring 12. When the coupling mechanism 16 connects to the glass bulb for temperature sensing for fire protection 11, it causes the first spring 12 to exert a compressive force. This compressive force is released when the glass bulb for temperature sensing for fire protection 11 bursts due to heat, driving the coupling mechanism 16 into motion. This, in turn, drives the first firing pin 13 connected to it into motion, thus generating an impact force on the first penetrating primer 14.

[0028] It is evident that “the coupling mechanism 16, when connected to the glass bubble for temperature sensing for fire protection 11, causes the first spring 12 to form a compressive force, such that the compressive force of the first spring 12 is released when the glass bubble for temperature sensing for fire protection 11 bursts due to heat,” as described above, is implemented by the following preferred solution: further comprising a second housing and an end cap; the coupling mechanism is a cross-shaped connecting structure formed by a transverse bar and a vertical bar; the first firing pin comprises an upper end located near the first piercing primer and a connecting base;One end of the crossbar is inserted perpendicularly through the connecting base of the first firing pin, and the other end is inserted perpendicularly through the center of the vertical bar and is firmly connected to the vertical bar to form a connecting section; the second housing is configured to connect the vertical bar of the coupling mechanism, the first spring, and the glass bulb for temperature sensing for fire protection in the same direction parallel to the direction of the first firing pin; one end of the vertical bar aligned in the same direction as the firing pin is connected to the glass bulb for temperature sensing for fire protection, and the other end of the glass bulb for temperature sensing for fire protection is attached to the second housing;The first spring is attached to the other end of the vertical rod, and a through-hole is provided at the other end of the second housing, with which the end cap is firmly connected from the outside of the second housing to attach the first spring to the vertical rod between the second housing and the connecting section; in the installed state of the vertical rod of the coupling mechanism, the first spring and the glass bulb for temperature sensing for fire protection in the second housing, the two ends of the second housing are each connected to the glass bulb for temperature sensing for fire protection and the end cap, and the first spring is in a compressed state;The height to which the first spring is compressed is greater than the predetermined distance between the striking end of the first firing pin and the striking end of the first piercing primer. The external view of the gas source for temperature sensing, formed as a whole by the structures described above, is shown in [reference]. Fig. 5 shown.

[0029] Where the spring constant of spring 12 is 2-15 N / mm and the height to which the spring is compressed is 5-20 mm to ensure an effective force for releasing compression; the nominal activation temperature of the glass bubble for temperature sensing for fire protection 11 is any of 93 °C, 141 °C or 182 °C.

[0030] The first compound solid propellant 15 comprises an adhesive, a curing agent, an oxidizing agent and a coolant; the adhesive is a hydroxyl-terminated polybutadiene and / or a carboxyl-terminated polybutadiene, and the content is 10-40 wt%; the curing agent is a toluene diisocyanate and / or an isophorone diisocyanate, and the content is 0.5-5 wt%; the oxidizing agent is an ammonium perchlorate and / or an ammonium nitrate, and the content is 20-60 wt%; the coolant is an azodicarbonamide, and the content is 20-60 wt%.

[0031] The pneumatic starter 3, whose structure is in Fig.Figure 6 shows a piston 31, a connecting rod 32, a retractable pin 33, a second spring 34, a second piercing primer 35, a second firing pin 36, and a pressure cap 37; the movable end face of the piston 31 faces the gas outlet of the pneumatic pipeline 2 to receive the gas pressure from the pneumatic pipeline 2 and to move under the influence of the gas pressure; one end of the connecting rod 32 is connected to and attached to the piston to move with the piston, and the other end is connected to the retractable pin 33; the retractable pin 33 is aligned parallel to the direction of movement of the piston 31, with one end of the retractable pin being connected to the connecting rod 32 and another end being connected to the second firing pin 36;The second firing pin 36 comprises a base and a spring sleeve rod on the base; the tip of the firing pin is arranged on the outside of the base; the inside of the base is connected to the spring sleeve rod; and the end section of the spring sleeve rod facing away from the base is provided with a transverse hole to be connected to the extendable pin 33; the outer circumference of the base is larger than the outer circumference of the second spring 34, and the outer circumference of the spring sleeve rod is smaller than the inner circumference of the second spring 34; the pressure cap 37 is a hollow structure with openings at both ends, the outer circumference of the opening at one end of the pressure cap being between the outer circumference of the second spring 34 and the outer circumference of the spring sleeve rod, and the outer circumference of the opening at the other end being larger than the outer circumference of the base of the second firing pin 36 and fitting the outer circumference of the second piercing primer 35;When the second spring 34 is attached to the outside of the spring sleeve rod of the second firing pin 36 and the spring sleeve rod is passed through the hollow section of the pressure cap 37 to connect its transverse hole with the extendable pin 33, the second spring 34 is fixed in the compressed state in the pressure cap 37; the second piercing primer 35 is attached to an end of the pressure cap 37 located near the base of the second firing pin 36, and the distance from the second piercing primer to the tip of the firing pin at the base of the second firing pin 36 is not greater than the height by which the second spring 34 is compressed; the ignition end of the second piercing primer 35 is connected to the gas generator 4;The connecting rod 32 moves synchronously with the movement of the piston 31 under the influence of gas, so that the extendable pin 33 is pulled out of the transverse hole on the spring sleeve rod of the second firing pin 36, thus releasing the compression of the second spring 34 in the pressure cap 37, causing the second firing pin 36 to strike the second piercing primer 35 to activate the gas generator 4 and generate gas in the gas generator 4. The external view of the pneumatic starter 3 formed by the parts described above is shown in ; Fig. 7 shown.

[0032] Where the cross-sectional area of ​​the piston 31 is no less than 4 times the venting cross-sectional area of ​​the pneumatic pipeline 2.

[0033] wherein the gas generator 4 comprises a second compound solid propellant and the second compound solid propellant comprises an adhesive, a curing agent, an oxidizing agent, a coolant and a stabilizer; wherein the adhesive is a polyethylene glycol, a polyethylene adipate or a polycaprolactone, or a combination thereof, and the content is 10-40 wt%; the curing agent is a toluene diisocyanate and / or an isophorone diisocyanate, and the content is 0.5-5 wt%; the oxidizing agent is an ammonium perchlorate and / or an ammonium nitrate, and the content is 20-60 wt%; the coolant is an azodicarbonamide and / or a dihydroxyglyoxime, and the content is 20-60 wt%; the stabilizer is 2-nitrodiphenylamine and / or 4-nitroaniline, and the content is 0.5-5 wt%.

[0034] The outer diameter of the pneumatic pipeline 2 is no more than 6 mm and the inner diameter is no more than 4 mm, and the pneumatic pipeline 2 is connected to the gas source for temperature detection 1 and / or the pneumatic starter 3 by clamping ring connection and / or welding.

[0035] There are two preferred arrangements for the gas generator 4: the pneumatic starter 3 is arranged on the outside of the first opening of the storage container for fire extinguishing agent 5, and the gas generator 4 is arranged on the inside of the first opening of the storage container for fire extinguishing agent 5; or the pneumatic starter 3 and the gas generator 4 are both arranged on the outside of the first opening of the storage container for fire extinguishing agent 5 and the opening of the gas generator 4 is in contact with the first opening of the storage container for fire extinguishing agent 5.

[0036] If, for example, a glass bubble for temperature sensing for fire protection 11 with an activation temperature of 141°C is selected, the glass bubble for temperature sensing for fire protection 11 bursts in the gas source for temperature sensing 1 after baking by fire up to 141°C, and thus the spring 12 drives the first firing pin 13 to strike the first piercing primer 14, and then flames are emitted from the first piercing primer 14 and thus ignite the first compound gas generating agent 15 in the gas source for temperature sensing 1, thereby generating a gas at a certain pressure and the gas in turn flows into the pneumatic pipeline 2 and on to the pneumatic starter 3, and the gas conveyed through the pneumatic pipeline 2 sets the piston 31 in the pneumatic starter 3 in motion, thus the piston 31 drives the connecting rod 32 to pull out the extendable pin 33,and the second spring 34 releases the pressure force to drive the stop of the tip of the second firing pin 36 against the second piercing percussion cap 35, and then the second piercing percussion cap 35 emits flames to the gas generator 4; the gas generator 4 produces a large quantity of gas to pressurize the fire extinguishing agent in the fire extinguishing agent reservoir 5, and if the pressure in the fire extinguishing agent reservoir 5 exceeds the set pressure, the fire extinguishing agent is sprayed out via the pipeline to the nozzle 6 to extinguish the fire at the point of ignition.

[0037] The performance parameters of some parts of the non-electric, automatic fire extinguishing system without pressure storage in this embodiment are shown in Table 1. Table 1 The performance parameters of the components of the non-electric, automatic fire extinguishing system without pressure storage in this embodiment Parts in the system Technical data Pneumatic piping Outer diameter 6 mm, Inner diameter 4 mm, stainless steel 304, compression fitting, total length approx. 12 m Pipeline for spraying Outer diameter 12 mm, inner diameter 10 mm, total length of the pipeline approx. 17 m, equipped with 15 Φ1.5 nozzles extinguishing agent Perfluorohexanone Fire extinguishing agent capacity / L 25 Continuous spray time / s 50±5 Piston cross-sectional diameter / mm 19,0 The weight of the gas-generating chemicals in the gas source for temperature measurement / g 4,40 Measured peak pressure at the end of the pneumatic pipeline / kPa (relative pressure) 268,9 The thrust of the pneumatic pipeline on the piston / N 75 The minimum temperature for normal system operation / °C -40 Maintenance-free period / year 15

[0038] The embodiments described above are merely exemplary and in no way limit the embodiments of the present invention; they can take other forms. Various embodiments of the present invention have been described above, and these descriptions are exemplary, non-exhaustive, and not limited to the disclosed embodiments. As would be obvious to a person skilled in the art, numerous modifications and changes can be made without departing from the scope and spirit of the described embodiments. Therefore, the scope of protection of the present invention should be limited to the scope of protection of the claims.

Claims

A non-electric, automatic fire extinguishing system without pressure storage, characterized in that: it comprises a gas source for temperature sensing (1), a pneumatic pipeline (2), a pneumatic starter (3), a gas generator (4), a reservoir for extinguishing agent (5), and a pipeline for spraying (6); the gas source for temperature sensing (1), the pneumatic pipeline (2), the pneumatic starter (3), and the gas generator (4) are connected in series; the reservoir for extinguishing agent (5) comprises a first opening and a second opening; the gas generator (4) is connected to the first opening of the reservoir for extinguishing agent (5), and the pipeline for spraying (6) is connected to the second opening of the reservoir for extinguishing agent (5); the gas source for temperature sensing (1) is configured to sensing the ambient temperature and generating gas;the pneumatic pipeline (2) is configured to convey the gas generated by the gas source for temperature detection (1) to the pneumatic starter (3) and to trigger the operation of the pneumatic starter (3) by the conveyed gas pressure; the pneumatic starter (3) is configured to ignite the gas generator (4) during operation; the gas generator (4) is configured to generate gas to drive the injection of an extinguishing agent from the storage container for fire extinguishing agent via the pipeline to the injection point (6). A non-electric, automatic fire extinguishing system without pressure storage according to claim 1, characterized in that: the gas source for temperature sensing (1) comprises a glass bladder for temperature sensing for fire protection (11), a first spring (12), a first firing pin (13), a first piercing primer (14), a first compound solid propellant (15) and a coupling mechanism (16); the first compound solid propellant (15) is installed in a housing, and the first compound solid propellant (15) is connected at the bottom of the housing to one end of the first piercing primer (14) in such a way that it is ignited by the first piercing primer (14), and the top of the first housing is provided with an opening which is connected to the pneumatic piping (2);the first firing pin (13) is located at the other end of the first piercing primer (14) and is at a predetermined distance from the lower end of the first piercing primer (14), and the firing pin (13) strikes the first piercing primer (14) by the stroke movement to cause the first piercing primer (14) to produce flames; upon impact by the first firing pin (13), the first piercing primer (14) ignites the first compound solid propellant (15) in the casing;The coupling mechanism (16) connects the first firing pin (13), the glass bulb for temperature sensing for fire protection (11), and the first spring (12). When connecting to the glass bulb for temperature sensing for fire protection (11), the coupling mechanism (16) causes the first spring (12) to exert a compressive force. This compressive force is released when the glass bulb for temperature sensing for fire protection (11) bursts due to heat, driving the coupling mechanism (16) to move. This movement then drives the first firing pin (13) connected to it, thus generating a striking force on the first piercing primer (14). Non-electric, automatic fire extinguishing system without pressure storage according to claim 2, characterized in that: the spring constant of the spring (12) is 2-15 N / mm and the height by which the spring is compressed is 5-20 mm; the nominal activation temperature of the glass bubble for temperature sensing for fire protection (11) is any of 93°C, 141°C or 182°C. A non-electric, automatic fire extinguishing system without pressure storage according to claim 2, characterized in that: the first compound solid propellant (15) comprises an adhesive, a curing agent, an oxidizing agent and a coolant; the adhesive is a hydroxyl-terminated polybutadiene and / or a carboxyl-terminated polybutadiene, and the content is 10-40 wt%; the curing agent is a toluene diisocyanate and / or an isophorone diisocyanate and the content is 0.5-5 wt%; the oxidizing agent is an ammonium perchlorate and / or an ammonium nitrate, and the content is 20-60 wt%; the coolant is an azodicarbonamide and the content is 20-60 wt%. A non-electric, automatic fire extinguishing system without pressure storage according to claim 1, characterized in that: the pneumatic starter (3) comprises a piston (31), a connecting rod (32), a retractable pin (33), a second spring (34), a second piercing primer (35), a second firing pin (36) and a pressure cap (37); the movable end face of the piston (31) faces the gas outlet of the pneumatic pipeline (2) to receive the gas pressure from the pneumatic pipeline (2) and to move under the influence of the gas pressure; one end of the connecting rod (32) is connected to and attached to the piston (31) to move with the piston, and the other end is connected to the retractable pin (33);the extendable pin (33) is aligned parallel to the direction of movement of the piston (31), with one end of the extendable pin being connected to the connecting rod (32) and another end being connected to the second firing pin (36); the second firing pin (36) comprises a base and a spring sleeve rod on the base, the tip of the firing pin is arranged on the outside of the base, the inside of the base is connected to the spring sleeve rod, and the end section of the spring sleeve rod facing away from the base is provided with a transverse hole to be connected to the extendable pin (33), the outer circumference of the base is larger than the outer circumference of the second spring (35), and the outer circumference of the spring sleeve rod is smaller than the inner circumference of the second spring (35);the pressure cap (37) is a hollow structure with openings at both ends, the outer circumference of the opening at one end of the pressure cap being between the outer circumference of the second spring (34) and the outer circumference of the spring sleeve rod, and the outer circumference of the opening at the other end being larger than the outer circumference of the base of the second firing pin (36) and fitting the outer circumference of the second piercing primer (35); when the second spring (34) is attached to the outside of the spring sleeve rod of the second firing pin (36) and the spring sleeve rod is passed through the hollow section of the pressure cap (38) to connect its transverse hole with the extendable pin (33), the second spring (34) is fixed in the compressed state in the pressure cap (37);the second piercing primer (35) is attached to an end of the pressure cap (37) located near the base of the second firing pin (36), and the distance from the second piercing primer to the tip of the firing pin at the base of the second firing pin (36) is not greater than the height by which the second spring (34) is compressed; the ignition end of the second piercing primer (35) is connected to the gas generator (4). Non-electric, automatic fire extinguishing system without pressure storage according to claim 4, characterized in that: the cross-sectional area of ​​the piston (31) is not less than 4 times the venting cross-sectional area of ​​the pneumatic pipeline (2). A non-electric, automatic fire extinguishing system without pressure storage according to claim 1, characterized in that: the gas generator (4) comprises a second compound solid propellant, and the second compound solid propellant comprises an adhesive, a curing agent, an oxidizing agent, a coolant, and a stabilizer; the adhesive is a polyethylene glycol, a polyethylene adipate, or a polycaprolactone, or a combination thereof, and the content is 10-40 wt%; the curing agent is a toluene diisocyanate and / or an isophorone diisocyanate and the content is 0.5-5 wt%; the oxidizing agent is an ammonium perchlorate and / or an ammonium nitrate, and the content is 20-60 wt%; the coolant is an azodicarbonamide and / or a dihydroxyglyoxime, and the content is 20-60 wt%; the stabilizer is a 2-nitrodiphenylamine and / or a 4-nitroaniline, and the content is 0.5 to 5 wt%. Non-electric, automatic fire extinguishing system without pressure storage according to claim 1, characterized in that: the outer diameter of the pneumatic pipeline (2) is no more than 6 mm, the inner diameter is no more than 4 mm, and the pneumatic pipeline (2) is connected to the gas source for temperature sensing (1) and / or the pneumatic starter (3) by clamping ring connection and / or welding. Non-electric, automatic fire extinguishing system without pressure storage according to claim 1, characterized in that: the pneumatic starter (3) is arranged on the outside of the first opening of the storage container for fire extinguishing agent (5) and the gas generator (4) is arranged on the inside of the first opening of the storage container for fire extinguishing agent (5). Non-electric, automatic fire extinguishing system without pressure storage according to claim 1, characterized in that: the pneumatic starter (3) and the gas generator (4) are both arranged on the outside of the first opening of the storage container for fire extinguishing agent (5), and the opening of the gas generator (4) is in communication with the first opening of the storage container for fire extinguishing agent (5).

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