WO2024259780A1 - Aerosol fire extinguishing device having integrated detection, activation, and pressure relief functions, installation method, and fire extinguishing method - Google Patents

Abstract

Disclosed in the present invention are an aerosol fire extinguishing device having integrated detection, activation, and pressure relief functions, an installation method, and a fire extinguishing method. The device comprises a shell; a fire extinguishing agent is provided in the shell; a nozzle is formed at the front end of the shell; the end surface of the fire extinguishing agent makes contact with an igniter; the igniter is a bridgeless igniter; an activation line of the igniter passes through the front end of the shell and is connected to the output end of piezoelectric ceramic; the piezoelectric ceramic is installed in a pressure relief channel on the front end of the shell; a glass bulb temperature sensing impact device is arranged above the piezoelectric ceramic. The present invention integrates detection, activation, and pressure relief functions into a small area by means of an installation cylinder, the piezoelectric ceramic, and the glass bulb temperature sensing impact device which are arranged at the pressure relief channel, has a simple structure, and achieves sensitive detection and safe activation.

Description

Detection-activated pressure-relief integrated aerosol fire extinguishing device and its installation and fire extinguishing method Technical Field

The present invention relates to the field of fire fighting technology, and in particular to a detection-activated pressure-relief integrated aerosol fire extinguishing device and an installation and fire extinguishing method.

Background Art

At present, with the continuous development of the energy storage industry, energy storage stations and energy storage battery boxes are also constantly iterating and updating. From a general perspective, it is not difficult to see that the interior of current energy storage stations and battery PACKs is becoming more and more compact. Traditional fire extinguishing devices installed in energy storage stations or battery PACKs often require the addition of special detection devices.

Some aerosol fire extinguishing devices use thermal wires as detection and activation structures, which can avoid the need for additional electronic detection equipment. However, thermal wires themselves are dangerous and environmentally polluting, so a corresponding activation mechanism is needed to solve this problem.

Aerosol fire extinguishing devices mainly extinguish fires by generating a large amount of gas and aerosol fire extinguishing materials after the aerosol generator is activated. The speed of generating gas and fire extinguishing materials depends on the activation area of the aerosol generator. However, as the volume of the fire extinguishing device continues to decrease, the internal pressure of the aerosol fire extinguishing device also increases. In this environment, the activation area of the aerosol generator will change due to the high pressure, causing a sudden increase in the internal pressure of the fire extinguishing device. Therefore, it is also necessary to design a pressure relief device to solve this problem.

In addition, in existing aerosol fire extinguishing devices, such as CN2023200802967 - a fire extinguishing device with a start protector, the starting components are all installed at the rear end of the shell. Therefore, when installing the ignition head, the starting wire of the ignition head needs to be passed along the fire extinguishing agent to the rear end of the shell to connect the starting component. This installation method makes the starting wire threading process complicated, time-consuming and labor-intensive, and affects the production efficiency of the fire extinguishing device.

Summary of the invention

The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a detection-activated pressure relief integrated aerosol fire extinguishing device and an installation and fire extinguishing method to solve the problems raised in the background technology.

In order to solve the above technical problems, the technical solution adopted by the present invention is: a detection-starting and pressure-relieving integrated aerosol fire extinguishing device, comprising a shell, a fire extinguishing agent is arranged in the shell, a nozzle is opened at the front end of the shell, the end face of the fire extinguishing agent is in contact with an ignition head, the ignition head is a bridgeless ignition head, the starting line of the ignition head passes through the front end of the shell and is connected to the output end of the piezoelectric ceramic, the piezoelectric ceramic is installed in the pressure relief groove at the front end of the shell, and a glass bulb temperature sensing knocking device is provided above the piezoelectric ceramic.

Preferably, the glass bulb temperature sensing knocking device cooperates with the pressure relief groove through an installation cylinder, the outer side of the installation cylinder contacts the inner side of the pressure relief groove, and a piezoelectric ceramic is arranged below the inner side of the installation cylinder.

Preferably, the glass bulb temperature sensing knocking device includes an impact rod arranged above the inner side of the mounting cylinder, the top of the impact rod contacts the inner top of the mounting cylinder, an impact plate is provided at the bottom of the impact rod, a compression spring is provided between the upper surface of the impact plate and the top of the mounting cylinder, the compression spring is passed through the surface of the impact rod, the lower surface of the impact plate contacts the top of the glass bulb, the bottom of the glass bulb contacts the top of the piezoelectric ceramic, and a plurality of hollow grooves are provided on the side of the mounting cylinder near the glass bulb area.

Preferably, the upper side and the lower side of the glass bulb are both provided with limiting grooves.

Preferably, the ignition head is embedded in an ignition powder bag, and the ignition powder bag is provided with aerosol generating agent powder.

Preferably, a coolant is provided between the top surface of the fire extinguishing agent and the nozzle; the fire extinguishing agent is an aerosol generating agent powder or a powder column structure formed by pressing the aerosol generating agent powder.

Preferably, a partition net is provided on both the upper side and the lower side of the coolant, and a support is provided between the bottom of the partition net on the lower side and the top surface of the fire extinguishing agent.

Preferably, the front end of the shell is threadably matched with the front cover, a nozzle and a pressure relief groove are provided on the front cover, a step for limiting the piezoelectric ceramic is provided in the pressure relief groove, and a diaphragm is provided on the surface of the nozzle.

The present invention also discloses an installation method of the above-mentioned detection-starting-pressure-relief integrated aerosol fire extinguishing device, which comprises the following steps:

S1: Open the front cover at the front end of the shell, load the fire extinguishing agent into the shell, then install the ignition head on the top surface of the fire extinguishing agent, pull the starting line upward, and then set the coolant on the top of the fire extinguishing agent;

S2: Pass the upper end of the starter wire upward from the pressure relief groove of the front cover and connect it to the output end of the piezoelectric ceramic installed in the pressure relief groove;

S3: Install and fix the front cover to the front end of the shell, insert the installation cylinder into the gap between the outer surface of the piezoelectric ceramic and the inner surface of the pressure relief groove, and then install the glass bulb temperature sensing knocking device on the upper side of the installation cylinder.

The present invention also discloses a fire extinguishing method of the above-mentioned detection-starting-pressure-relief integrated aerosol fire extinguishing device, which comprises the following steps:

S1: When a fire occurs, the glass bulb expands and breaks due to the high temperature through the hollow groove, thereby releasing the limiting effect on the impact plate. Under the action of the compression spring force, the impact plate moves downward and hits the piezoelectric ceramic;

S2: The piezoelectric ceramic starts up after being impacted and generates an induced current, which is transmitted to the ignition head through the starting wire to make it work, thereby igniting the fire extinguishing agent;

S3: The fire extinguishing agent burns to produce fire extinguishing material, which then passes through the coolant and is ejected from the nozzle position to carry out the fire extinguishing process.

Beneficial effects of the present invention:

The present invention integrates the detection, start-up and pressure relief functions into a smaller area by means of a mounting cylinder, piezoelectric ceramics and a glass bulb temperature-sensing knocking device arranged in the area where the pressure relief groove is located. The structure is simple, the detection is sensitive and the start-up is safe. In the case of an abnormal sudden increase in pressure, the piezoelectric ceramics and the mounting cylinder can be ejected in time to expose the pressure relief groove, thereby realizing the pressure relief process. During the installation process, the upper end of the starting wire passes upward from the pressure relief groove of the front cover and is connected to the output end of the piezoelectric ceramic installed in the pressure relief groove. This starting wire installation process is simple. At the same time, the starting wire of the present invention also serves as a protective wire during the pressure relief process to prevent the piezoelectric ceramic and the installation cylinder from spraying out and causing safety accidents.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a detection-activated pressure-relief integrated aerosol fire extinguishing device;

FIG. 2 is an enlarged structural diagram of the area where the glass bulb temperature sensing tapping device in FIG. 1 is located.

DETAILED DESCRIPTION

The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 and 2, a detection-starting and pressure-relieving integrated aerosol fire extinguishing device includes a shell 1, a fire extinguishing agent 2 is arranged in the shell 1, a nozzle 3 is opened at the front end of the shell 1, the end face of the fire extinguishing agent 2 is in contact with an ignition head 4, the ignition head 4 is a bridgeless ignition head, a starting line 4.1 of the ignition head 4 passes through the front end of the shell 1 and is connected to the output end of a piezoelectric ceramic 5, the piezoelectric ceramic 5 is installed in a pressure relief groove 6 at the front end of the shell 1, and a glass bulb temperature sensing knocking device 7 is provided above the piezoelectric ceramic 5.

Preferably, the glass bulb temperature sensing knocking device 7 cooperates with the pressure relief groove 6 through the installation cylinder 8, the outer side of the installation cylinder 8 contacts the inner side of the pressure relief groove 6, and the piezoelectric ceramic 5 is arranged below the inner side of the installation cylinder 8. In this embodiment, the installation cylinder 8 can play three roles: first, it can facilitate the installation process of the glass bulb temperature sensing knocking device 7 in the pressure relief groove 6; second, it can facilitate the position limiting of the piezoelectric ceramic 5; and third, it can facilitate the piezoelectric ceramic 5 and the installation cylinder 8 to be separated from the pressure relief groove 6 during the pressure relief process, thereby exposing the pressure relief channel.

Preferably, the glass bulb temperature sensing knocking device 7 includes an impact rod 7.1 arranged on the upper inner side of the mounting cylinder 8, the top of the impact rod 7.1 contacts the inner top of the mounting cylinder 8, an impact plate 7.3 is arranged at the bottom of the impact rod 7.1, a compression spring 7.4 is arranged between the upper surface of the impact plate 7.3 and the top of the mounting cylinder 8, the compression spring 7.4 is passed through the surface of the impact rod 7.1, the lower surface of the impact plate 7.3 contacts the top of the glass bulb 7.5, the bottom of the glass bulb 7.5 contacts the top of the piezoelectric ceramic 5, and a plurality of hollow grooves 7.2 are opened on the side of the mounting cylinder 8 near the glass bulb 7.5 area. In this embodiment, when a fire occurs, the glass bulb 7.5 expands and breaks due to the high temperature through the hollow groove 7.2, thereby releasing the limiting effect on the impact plate 7.3. Under the action of the elastic force of the compression spring 7.4, the impact plate 7.3 moves downward and impacts the piezoelectric ceramic 5; the piezoelectric ceramic 5 is started after being impacted and generates an induced current, which is conducted to the ignition head 4 through the starting line 4.1 to make it work, thereby igniting the fire extinguishing agent 2 and completing the starting process.

Preferably, the upper and lower sides of the glass bulb 7.5 are both provided with limiting grooves 7.6, through which the glass bulb 7.5 can be limited to prevent it from lateral shaking.

The ignition head 4 is embedded in an ignition powder bag 12, and an aerosol generating agent powder is provided in the ignition powder bag 12. In the embodiment, the ignition head 4 adopts a bridgeless ignition head. Since a certain gap is left between the two ignition wires of the bridgeless ignition head, an arc jump phenomenon will occur after providing a certain current or induced current to start the contacting ignition powder. In this embodiment, the ignition powder bag 12 serves as the ignition powder, which buries the ignition head 4 therein. After the ignition head 4 is started, the aerosol generating agent in the ignition powder bag 12 is ignited, thereby quickly generating heat and igniting the nearby fire extinguishing agent 2, which greatly improves the probability of successful starting of the ignition head 4.

Preferably, a coolant 9 is further provided between the top surface of the fire extinguishing agent 2 and the nozzle 3; the fire extinguishing agent 2 is an aerosol generating agent powder or a drug column structure formed by pressing the aerosol generating agent powder. The high-temperature fire extinguishing material generated by the ignition of the fire extinguishing agent 2 can be cooled by the coolant 9 to prevent the temperature ejected from the nozzle 3 from being too high. In this embodiment, the fire extinguishing agent 2 is an aerosol generating agent, which can be in two states, one is a powder state, which burns more violently and produces gas at a fast speed, and the other is a drug column structure formed by pressing, which burns more steadily and produces gas at a steady speed. In actual production, it can be selected according to the actual situation.

Preferably, a partition 10 is provided on both the upper and lower sides of the coolant 9, and a support 11 is provided between the bottom of the partition 10 on the lower side and the top surface of the fire extinguishing agent 2. In this embodiment, the coolant 9 itself is granular, so the partitions 10 on the upper and lower sides can play a limiting role. In this embodiment, there is no fixed connection between the partition 10 and the inner wall of the shell 1, but only maintains a contact state with the inner wall of the shell 1. In addition, the support 11 can prevent the partition 10 on the lower side from directly pressing the area where the ignition head 4 is located, thereby preventing the ignition process from being affected and causing ignition failure.

Preferably, the front end of the housing 1 is threadedly matched with the front cover 1.1, and the front cover 1.1 is provided with a nozzle 3 and a pressure relief groove 6. The pressure relief groove 6 is also provided with a step for limiting the piezoelectric ceramic 5, and a diaphragm is provided on the surface of the nozzle 3. After the step is provided in the pressure relief groove 6, the installation process of the piezoelectric ceramic 5 can be facilitated, and the top surface of the step can also limit the bottom of the installation cylinder 8; after the diaphragm is provided on the surface of the nozzle 3, it can prevent moisture in the air from entering the housing 1 through the nozzle 3 during the normal storage and transportation of the fire extinguishing device, causing the fire extinguishing agent 2 to absorb moisture. In addition, during the fire extinguishing process, when the air pressure inside the housing 1 increases, it is easy to break the diaphragm, which does not affect the normal spraying process of the nozzle 3.

The present invention also discloses an installation method of the above-mentioned detection-starting-pressure-relief integrated aerosol fire extinguishing device, which comprises the following steps:

S1: Open the front cover 1.1 at the front end of the housing 1, load the fire extinguishing agent 2 into the housing 1, then install the ignition head 4 on the top surface of the fire extinguishing agent 2, and pull the start line 4.1 upward, and then set the coolant 9 on the top of the fire extinguishing agent 2;

S2: The upper end of the start wire 4.1 passes upward through the pressure relief groove 6 of the front cover 1.1 and is connected to the output end of the piezoelectric ceramic 5 installed in the pressure relief groove 6;

S3: Fix the front cover 1.1 to the front end of the shell 1, insert the installation cylinder 8 into the gap between the outer surface of the piezoelectric ceramic 5 and the inner surface of the pressure relief groove 6, and then install the glass bulb temperature sensing knocking device 7 on the upper side of the installation cylinder 8.

The present invention also discloses a fire extinguishing method of the above-mentioned detection-starting-pressure-relief integrated aerosol fire extinguishing device, which comprises the following steps:

S1: When a fire occurs, the glass bulb 7.5 expands and breaks due to the high temperature through the hollow groove 7.2, thereby releasing the limiting effect on the impact plate 7.3. Under the action of the elastic force of the compression spring 7.4, the impact plate 7.3 moves downward and impacts the piezoelectric ceramic 5;

S2: The piezoelectric ceramic 5 is activated after being impacted and generates an induced current, which is transmitted to the ignition head 4 through the starter wire 4.1 to make it work, thereby igniting the fire extinguishing agent 2;

S3: The fire extinguishing agent 2 burns to produce fire extinguishing material, which then passes through the coolant 9 and is ejected from the nozzle 3 to perform the fire extinguishing process.

The present invention discloses a pressure relief method for the above-mentioned detection-activated pressure relief integrated aerosol fire extinguishing device, which comprises the following steps:

S1: During the fire extinguishing process, if the pressure in the housing 1 increases suddenly due to abnormality, the mounting cylinder 8 and the piezoelectric ceramic 5 are separated upward from the pressure relief groove 6 under the action of the air pressure;

S2: Gas is ejected from the pressure relief groove 6 to achieve the pressure relief function;

S3: During the upward movement of the piezoelectric ceramic 5, the ignition head 4 is driven to move upward through the start line 4.1. When the ignition head 4 moves upward to contact the partition 10 on the lower side, the partition 10 is driven to move upward together;

S4: The partition 10 moves upward and gradually compresses the coolant 9. The gradually compressed coolant 9 forms a buffer for the partition 10. After the partition 10 stops moving, the ignition head 4 is also blocked and stops moving, and then the piezoelectric ceramic 5 is pulled to stop moving through the starter wire 4.1, preventing the piezoelectric ceramic 5 and the mounting cylinder 8 from spraying out and causing a safety accident. In this step, the gradually compressed coolant 9 forms a buffer for the partition 10, which can prevent the partition 10 from moving too fast and breaking the starter wire 4.1.

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

Claims (10)

A detection-starting-pressure-relief integrated aerosol fire extinguishing device comprises a shell (1), wherein a fire extinguishing agent (2) is arranged in the shell (1), and a nozzle (3) is provided at the front end of the shell (1), characterized in that: the end face of the fire extinguishing agent (2) contacts an ignition head (4), the ignition head (4) is a bridgeless ignition head, a starting line (4.1) of the ignition head (4) passes through the front end of the shell (1) and is connected to the output end of a piezoelectric ceramic (5), the piezoelectric ceramic (5) is installed in a pressure relief groove (6) at the front end of the shell (1), and a glass bulb temperature sensing knocking device (7) is provided above the piezoelectric ceramic (5). The detection-activated pressure-relief integrated aerosol fire extinguishing device according to claim 1 is characterized in that: the glass bulb temperature-sensing knocking device (7) cooperates with the pressure relief groove (6) through the installation cylinder (8), the outer side of the installation cylinder (8) contacts the inner side of the pressure relief groove (6), and a piezoelectric ceramic (5) is arranged below the inner side of the installation cylinder (8). The detection-activated pressure-relief integrated aerosol fire extinguishing device according to claim 2 is characterized in that: the glass bulb temperature-sensing knocking device (7) comprises a striking rod (7.1) arranged on the upper inner side of the mounting cylinder (8), the top of the striking rod (7.1) contacts the inner top of the mounting cylinder (8), a striking disc (7.3) is arranged at the bottom of the striking rod (7.1), a compression spring (7.4) is arranged between the upper surface of the striking disc (7.3) and the top of the mounting cylinder (8), the compression spring (7.4) is passed through the surface of the striking rod (7.1), the lower surface of the striking disc (7.3) contacts the top of the glass bulb (7.5), the bottom of the glass bulb (7.5) contacts the top of the piezoelectric ceramic (5), and a plurality of hollow grooves (7.2) are provided on the side of the mounting cylinder (8) near the glass bulb (7.5). The detection-activated pressure-relieving integrated aerosol fire extinguishing device according to claim 3 is characterized in that: limiting grooves (7.6) are provided on the upper and lower sides of the glass bulb (7.5). The detection-activated pressure-relieving integrated aerosol fire extinguishing device according to claim 1 is characterized in that the ignition head (4) is embedded in an ignition powder bag (12), and the ignition powder bag (12) is provided with aerosol generating agent powder. The detection-activated pressure-relieving integrated aerosol fire extinguishing device according to claim 1 is characterized in that: a coolant (9) is also provided between the top surface of the fire extinguishing agent (2) and the nozzle (3); the fire extinguishing agent (2) is an aerosol generating agent powder or a powder column structure formed by pressing the aerosol generating agent powder. The detection-activated pressure-relief integrated aerosol fire extinguishing device according to claim 6 is characterized in that: a partition net (10) is provided on the upper and lower sides of the coolant (9), and a support member (11) is provided between the bottom of the partition net (10) on the lower side and the top surface of the fire extinguishing agent (2). The detection-activated pressure-relief integrated aerosol fire extinguishing device according to claim 1 is characterized in that: the front end of the shell (1) is threadedly matched with the front cover (1.1), the front cover (1.1) is provided with a nozzle (3) and a pressure relief groove (6), the pressure relief groove (6) is also provided with a step for limiting the piezoelectric ceramic (5), and a diaphragm is provided on the surface of the nozzle (3). A method for installing the detection-activated pressure-relief integrated aerosol fire extinguishing device according to any one of claims 1 to 8, characterized in that it comprises the following steps: S1: Open the front cover (1.1) at the front end of the housing (1), load the fire extinguishing agent (2) into the housing (1), then install the ignition head (4) on the top surface of the fire extinguishing agent (2), and pull the start line (4.1) upwards, and then set the coolant (9) on the top of the fire extinguishing agent (2); S2: The upper end of the start line (4.1) is passed upward through the pressure relief groove (6) of the front cover (1.1) and connected to the output end of the piezoelectric ceramic (5) installed in the pressure relief groove (6); S3: The front cover (1.1) is fixedly mounted to the front end of the housing (1), the mounting cylinder (8) is inserted into the gap between the outer surface of the piezoelectric ceramic (5) and the inner surface of the pressure relief groove (6), and then the glass bulb temperature sensing knocking device (7) is installed on the upper side of the mounting cylinder (8). A fire extinguishing method of the detection-activated pressure-relief integrated aerosol fire extinguishing device according to any one of claims 1 to 8, characterized in that it comprises the following steps: S1: When a fire occurs, the glass bulb (7.5) expands and breaks due to the high temperature through the hollow groove (7.2), thereby releasing the limiting effect on the impact plate (7.3). Under the action of the elastic force of the compression spring (7.4), the impact plate (7.3) moves downward and impacts the piezoelectric ceramic (5); S2: The piezoelectric ceramic (5) is activated after being impacted and generates an induced current, which is conducted to the ignition head (4) through the starter wire (4.1) to make it work, thereby igniting the fire extinguishing agent (2); S3: The fire extinguishing agent (2) burns to produce fire extinguishing material, which then passes through the coolant (9) and is ejected from the nozzle (3) to carry out the fire extinguishing process.