An extinguishing system driven by a gas-producing cylinder for extinguishing agent and an extinguishing method thereof

Abstract

The present invention discloses a method for driving a fire extinguishing agent by a gas-producing cylinder and a fire extinguishing system having the method. When a fire occurs, a gas generator on the cylinder body generates pressurized gas, which pushes the piston to move downward, driving the fire extinguishing agent to burst the rupture disk at the bottom of the cylinder body and release the fire extinguishing agent. The present invention uses a sealed fire extinguishing agent cylinder to store the fire extinguishing agent at normal pressure. The fire extinguishing agent cylinder does not belong to a special equipment high-pressure container, and is very convenient for transportation, installation, use and maintenance; the present invention uses a sealed fire extinguishing agent cylinder to store the fire extinguishing agent at normal pressure. The fire extinguishing agent cylinder does not belong to a special equipment high-pressure container and does not need to be regularly inspected according to the gas cylinder inspection regulations, thereby reducing the equipment maintenance cost; the present invention can effectively transport the last remaining fire extinguishing agent from the gas cylinder and pipeline to the protected area.

Description

Technical Field

[0001] The present invention relates to the technical field of fire-fighting devices, and particularly to a fire-extinguishing system for driving a fire-extinguishing agent by a gas-producing cylinder and a fire-extinguishing method thereof. Background Art

[0002] In the existing gas fire-extinguishing devices or systems, the delivery method of the fire-extinguishing agent uses high-pressure gas (usually compressed nitrogen) stored in high-pressure cylinders to drive, and is transported through a pipeline to a nozzle for spraying and extinguishing (see Figure 1 ). This kind of fire-extinguishing system using high-pressure cylinders to store the fire-extinguishing agent and the driving gas has the following disadvantages: 1. High-pressure cylinders belong to special equipment high-pressure containers, and are very inconvenient for transportation, installation, use and maintenance; 2. After the gas fire-extinguishing agent leaks or is sprayed, the cylinder needs to be refilled by a qualified unit or manufacturer, and a temporary spare cylinder is used to prevent the system from "stopping use", thus increasing costs; 3. Since the system uses cylinders to store high-pressure gas, a large amount of labor and professional personnel are required to handle the safety problems of high-pressure gas; 4. Since the system uses high-pressure cylinders with constant pressure to store high-pressure gas, the risk of leakage of the fire-extinguishing agent and high-pressure gas is high, and once the fire-extinguishing agent leaks, it cannot be repaired and refilled online; 5. The system uses high-pressure cylinders with constant pressure. Due to the long-term slight corrosion of the fire-extinguishing agent and moisture, the pressure-bearing safety risk of the cylinder is high; 6. High-pressure cylinders need to be regularly inspected according to the cylinder inspection regulations. Every few years, the fire-extinguishing agent needs to be discharged from the cylinder. After the cylinder is re-pressurized and inspected and qualified, the fire-extinguishing agent is refilled, thus increasing the equipment maintenance cost; 7. The last remaining fire-extinguishing agent cannot be transported from the cylinder and the pipeline to the protected area. Summary of the Invention

[0003] The present invention aims to overcome the above-mentioned defects (deficiencies) of the prior art, and provides a method for driving a fire-extinguishing agent by a gas-producing cylinder and a fire-extinguishing system having this method.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A fire-extinguishing system for driving a fire-extinguishing agent by a gas-producing cylinder, comprising a cylinder body for storing a fire-extinguishing agent and a liquid outlet assembly provided at the bottom of the cylinder body. A piston is provided in the cylinder body to divide the cylinder body into two cavities. A gas generator is provided at the top of the cylinder body. When the gas generator is started, the gas generator generates pressurized gas to push the piston, thereby driving the fire-extinguishing agent to be released through the liquid outlet assembly; the liquid outlet assembly includes a bursting disc provided in the bottom channel of the cylinder body and a pressing ring for pressing the bursting disc.

[0006] The fire extinguishing system of the present invention further includes a connecting pipe for extinguishing agent delivery, a manifold, a selector valve, an extinguishing agent delivery pipeline, and a nozzle for spraying the extinguishing agent into the protected area, which are connected in sequence. The middle part of the piston is a channel with a step, on which a sealing diaphragm for isolating the upper and lower ends of the piston and a compression nut for fixing the sealing diaphragm are provided, and a puncture needle corresponding to the sealing diaphragm is provided at the bottom of the cylinder block. A safety valve is provided on the manifold. The cylinder block is equipped with a filling valve, a liquid level sensor, and a one-way valve connecting the bottom channel. At least one O-ring rubber seal is embedded on the side wall of the piston.

[0007] Preferably, a signal feedback device is provided in the protected area of the present invention, and the gas generator, the liquid level sensor, the selector valve, and the signal feedback device are respectively connected to a control panel.

[0008] For the fire extinguishing method using the fire extinguishing system of the present invention, when a fire occurs, the gas generator on the cylinder block generates pressurized gas, which pushes the piston downward, driving the extinguishing agent to burst the rupture disc at the bottom of the cylinder block and release the extinguishing agent. In the present invention, after the piston pushes all the extinguishing agent in the cylinder block, the piston moves to the bottom of the cylinder block, and the puncture needle at the bottom of the cylinder block pierces the sealing diaphragm on the piston, and the gas at the upper end of the cylinder sprays all the remaining extinguishing agent in pipelines such as the connecting pipe, the manifold, and the extinguishing agent delivery pipeline from the nozzle into the protected area.

[0009] The present invention adopts the above technical solutions, and its advantages are as follows: The present invention uses a sealed extinguishing agent cylinder to store the extinguishing agent at normal pressure. The extinguishing agent cylinder does not belong to a special equipment high-pressure container, and transportation, installation, use, and maintenance are very convenient; The gaseous extinguishing agent of the present invention is stored at normal pressure. If there is leakage or after spraying, the extinguishing agent can be filled immediately by itself, without the need for a qualified unit or manufacturer, and there is no need to use a temporary spare gas cylinder to prevent the system from "stopping use"; The present invention does not need to use gas cylinders to store high-pressure gas, so there is no need for additional labor and professional personnel to handle the safety problems of high-pressure gas; The present invention uses a sealed extinguishing agent cylinder to store the extinguishing agent at normal pressure, and the risk of extinguishing agent leakage is extremely low. If there is leakage of the extinguishing agent, it can be repaired and filled online; The present invention uses a sealed extinguishing agent cylinder to store the extinguishing agent at normal pressure. The extinguishing agent cylinder is not pressurized usually, and there is no pressure-bearing safety risk brought by the long-term slight corrosion of the extinguishing agent and moisture; The present invention uses a sealed extinguishing agent cylinder to store the extinguishing agent at normal pressure. The extinguishing agent cylinder does not belong to a special equipment high-pressure container and does not need to be regularly inspected according to the gas cylinder inspection regulations, thus reducing the equipment maintenance cost; The present invention can effectively transport the last remaining extinguishing agent from the gas cylinder and pipeline to the protected area. Description of the Drawings

[0010] Figure 1 It is a schematic diagram of a fire extinguishing system in the prior art.

[0011] Figure 2 is a schematic illustration of the present invention Figure 1 。

[0012] Figure 3 is a schematic illustration of the present invention Figure 2 。

[0013] Figure 4 is a schematic illustration of the present invention Figure 3 。

[0014] Wherein: fire extinguishing agent 100; cylinder block 1; piston 2; gas generator 3; filling valve 4; liquid level sensor 5; check valve 6; rupture disc 7; pressure ring 8; sealing diaphragm 9; compression nut 10; puncture needle 11; connecting pipe 12; manifold 13; selection valve 14; fire extinguishing agent delivery pipe 15; nozzle 16; signal feedback device 17; control panel 18; O-ring rubber seal 19; safety valve 20. Detailed implementation manner

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and implementation manners.

[0016] As shown in the attached Figures 2 - 4 figures, a gas-generating cylinder-driven fire extinguishing system for fire extinguishing agent in this embodiment includes a cylinder block 1 for storing fire extinguishing agent 100 and an outlet assembly provided at the bottom of the cylinder block 1. The cylinder block 1 generally adopts a cylindrical structure. A piston 2 is provided in the cylinder block 1 to divide the cylinder block 1 into two chambers. The piston 2 is used to seal the fire extinguishing agent. The overall structure of the piston 2 is cylindrical and can slide up and down in the cylinder block 1. When a fire occurs, it is used to push the fire extinguishing agent. A gas generator 3 is provided at the top of the cylinder block 1. The gas generator 3 described in the present invention is a purchased component, and its specific structure is not disclosed in the present invention. When the gas generator 3 is started, the gas generator 3 generates pressurized gas to push the piston 2, thereby driving the fire extinguishing agent to be released through the outlet assembly. The cylinder block 1 is equipped with a filling valve 4, a liquid level sensor 5, and a check valve 6 connecting the bottom channel.

[0017] As a preferred implementation manner, the outlet assembly in this embodiment includes a rupture disc 7 provided in the bottom channel of the cylinder block 1 and a pressure ring 8 pressing the rupture disc 7. The rupture disc 7 is a circular convex metal thin sheet used to seal the fire extinguishing agent. When a fire occurs, the gas generator 3 generates pressurized gas to push the piston 2 and drive the fire extinguishing agent. When the pressure of the fire extinguishing agent in the cylinder block 1 reaches the bursting pressure of the rupture disc 7, the rupture disc 7 automatically bursts to release the fire extinguishing agent. To increase the sealing performance of the piston 2, at least one O-ring rubber seal 19 is embedded on the side wall of the piston 2. The axes of the gas generator 3, the piston 2, the compression nut 10, the sealing diaphragm 9, and the puncture needle 11 coincide.

[0018] As a preferred embodiment, the middle part of the piston 2 in this embodiment is a channel with a step. A sealing diaphragm 9 that isolates the upper and lower ends of the piston 2 and a compression nut 10 that fixes the sealing diaphragm 9 are provided on the step. A puncture needle 11 corresponding to the sealing diaphragm 9 is provided at the bottom of the cylinder block 1. The puncture needle 11 is a hollow cylinder, and the upper edge thereof is a sharp cutting edge.

[0019] As a preferred embodiment, a fire extinguishing system for a gas-producing cylinder to drive a fire extinguishing agent in this embodiment further includes a connecting pipe 12 for fire extinguishing agent transportation, a manifold 13, a selector valve 14, a fire extinguishing agent transportation pipeline 15, and a nozzle 16 that sprays the fire extinguishing agent into a protected area, which are connected in sequence. The connecting pipe 12 is a high-pressure hose installed between the one-way valve 6 and the manifold 13. During spraying, it transports the fire extinguishing agent to the manifold 13 and simultaneously plays a role in buffering pressure and reducing vibration. The manifold 13 is used to collect the high-pressure fire extinguishing agent medium flow output by the cylinder block 1. A safety valve 20 is provided on the manifold 13. When the pressure exceeds 1.1 times the rated working pressure, the safety valve 20 opens to relieve pressure to provide overpressure protection for the system. The selector valve 14 is installed on the manifold 13. When a fire extinguishing system protects multiple protected areas at the same time, the same number of selector valves 14 can be installed according to the number of protected areas. When a fire occurs in a certain protected area, the corresponding selector valve 14 for that protected area is activated, so that the fire extinguishing agent is sprayed into the corresponding protected area for fire extinguishing. A signal feedback device 17 is provided in the protected area. The gas generator 3, the liquid level sensor 5, the selector valve 14, and the signal feedback device 17 are respectively connected to a control panel 18. When a fire occurs and the fire extinguishing agent is released, the signal feedback device 17 feeds back the signal to the control panel 18. The control panel 18 receives the fire alarm signal, controls the activation of the gas generator 3 on the fire extinguishing agent cylinder, and simultaneously opens the selector valve 14 for the corresponding protected area. It has automatic start and manual start functions. When the automatic start fails, it can be manually started emergently for fire extinguishing. The control panel 18 can automatically control the number of fire extinguishing agent cylinders to be opened according to the amount of fire extinguishing agent required for each protected area. The control panel 18 also has the function of monitoring the liquid level of the fire extinguishing agent and the feedback of the pressure signal after the fire extinguishing agent is sprayed. The nozzle 16 is installed on the pipe network in the protected area. The high-pressure fire extinguishing agent medium flow is atomized through the nozzle 16, and then quickly vaporizes when heated, and is evenly distributed in the fire protection area for fire extinguishing.

[0020] In this embodiment, the fire extinguishing method of the fire extinguishing system according to the present invention is adopted. When a fire occurs, a gas generator on the cylinder block generates pressurized gas, which pushes the piston downward, driving the fire extinguishing agent to burst the bursting disc at the bottom of the cylinder block and release the fire extinguishing agent. As a preferred embodiment, in this embodiment, after the piston has pushed all the fire extinguishing agent in the cylinder block, the piston moves to the bottom of the cylinder block, and a puncture needle located at the bottom of the cylinder block pierces the sealing diaphragm on the piston. The gas at the upper end of the cylinder passes through the pierced diaphragm and sprays all the remaining fire extinguishing agent in the connecting pipe, manifold, and fire extinguishing agent delivery pipeline from the nozzle into the protected area.

[0021] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A fire extinguishing system that uses a gas-producing cylinder to drive a fire extinguishing agent, characterized in that, It includes a cylinder body for storing fire extinguishing agent and a liquid outlet assembly provided at the bottom of the cylinder body. A piston is provided inside the cylinder body, which can divide the cylinder body into two cavities. A gas generator is provided at the top of the cylinder body, and a bursting disc and a puncture needle are provided at the bottom of the gas generator. The middle part of the piston is a channel with a step. A sealing diaphragm for isolating the upper and lower ends of the piston and a compression nut for fixing the sealing diaphragm are provided on the step. A puncture needle corresponding to the sealing diaphragm is provided at the bottom of the cylinder body. The puncture needle is a hollow cylinder, and the upper edge thereof is a sharp blade. When the piston moves to the bottom, the puncture needle pierces the sealing diaphragm, so that the gas pushes the residual fire extinguishing agent out. The cylinder body is equipped with a filling valve, a liquid level sensor and a one-way valve connecting the bottom channel.

2. The fire extinguishing system according to claim 1, wherein The liquid outlet assembly includes a bursting disc provided in the bottom channel of the cylinder body and a compression ring for pressing the bursting disc. The bursting disc is a circular convex metal thin sheet. The axes of the gas generator, the piston, the compression nut, the sealing diaphragm and the puncture needle coincide.

3. The fire extinguishing system according to claim 2, wherein It also includes a connecting pipe for fire extinguishing agent delivery, a manifold pipe, a selector valve, a fire extinguishing agent delivery pipeline and a nozzle for spraying the fire extinguishing agent into the protected area, which are connected in sequence.

4. The fire extinguishing system according to claim 2, characterized in that, The cylinder body is equipped with a filling valve, a liquid level sensor and a one-way valve connecting the bottom channel.

5. The fire extinguishing system according to claim 2, characterized in that, At least one O-shaped rubber sealing ring is embedded on the side wall of the piston.

6. The fire extinguishing system according to claim 3, characterized in that, A signal feedback device is provided in the protected area. The gas generator, the liquid level sensor, the selector valve and the signal feedback device are respectively connected to a control panel.

7. The fire extinguishing system according to claim 3, wherein, A safety valve is provided on the manifold pipe.

8. A fire extinguishing method using the fire extinguishing system according to any one of claims 1 to 7, characterized in that, When a fire occurs, the gas generator at the top of the cylinder body generates pressurized gas, which pushes the piston to move downward, driving the fire extinguishing agent to burst the bursting disc at the bottom of the cylinder body. When the piston has pushed all the fire extinguishing agent in the cylinder body, the piston moves to the bottom of the cylinder body. The puncture needle located at the bottom of the cylinder body pierces the sealing diaphragm on the piston, and the gas at the upper end of the cylinder sprays all the residual fire extinguishing agent in the pipeline out of the nozzle into the protected area through the pierced diaphragm.

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