WO2024259781A1 - Detection, starting and pressure relief integrated aerosol fire extinguishing device and fire extinguishing and pressure relief methods - Google Patents

Abstract

A detection, starting and pressure relief integrated aerosol fire extinguishing device and fire extinguishing and pressure relief methods, the detection, starting and pressure relief integrated aerosol fire extinguishing device comprising a housing (1), wherein a fire extinguishing agent (2) is provided in the housing, a nozzle (3) is provided at the front end of the housing, and a coolant (9) is also provided between a top surface of the fire extinguishing agent and the nozzle; and an end surface of the fire extinguishing agent is in contact with an ignition head (4), the ignition head is a bridgeless ignition head, a starting line (4.1) of the ignition head passes out of the front end of the housing and is connected to an output end of a piezoelectric ceramic (5), the piezoelectric ceramic is mounted in a pressure relief groove (6) in the front end of the housing, and a glass bulb temperature sensing tapping device (7) is provided above the piezoelectric ceramic. According to the detection, starting and pressure relief integrated aerosol fire extinguishing device and the fire extinguishing and pressure relief methods, a mounting cylinder, the piezoelectric ceramic and the glass bulb temperature sensing tapping device are arranged in an area where the pressure relief groove is located, such that a detection function, a starting function and a pressure relief function are integrated in a small area, enabling a simple structure, sensitive detection, and safe startup.

Description

Detection-activated pressure-releasing integrated aerosol fire extinguishing device and fire extinguishing and pressure-releasing method Technical Field

The present invention relates to the field of fire fighting technology, and in particular to a detection-activated pressure-relieving integrated aerosol fire extinguishing device and a fire extinguishing and pressure-relieving 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 a fire extinguishing and pressure-relieving 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, and a coolant is also arranged between the top surface of the fire extinguishing agent and the nozzle; the end surface of the fire extinguishing agent is in contact with an ignition head, and 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 arranged above the piezoelectric ceramic.

Preferably, the glass bulb temperature sensing knocking device is matched with the pressure relief groove by installing the cylinder body, and the outer side of the cylinder body is installed with the pressure relief groove. The inner side of the groove is in contact with the piezoelectric ceramics installed at the lower inner side of the 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, 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 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.

The present invention also discloses a pressure relief method for the above-mentioned fire extinguishing device with detection, activation and pressure relief, which comprises the following steps:

S1: During the fire extinguishing process, if the pressure inside the shell increases suddenly due to abnormality, the installation cylinder and piezoelectric ceramics will be separated from the pressure relief groove upwards under the action of air pressure;

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

S3: During the upward movement of the piezoelectric ceramic, the ignition head is driven upward through the starter wire. When the ignition head moves up to contact the lower partition, the partition is driven upward together;

S4: The partition moves upward and gradually compresses the coolant. The gradually compressed coolant forms a buffer for the partition. After the partition stops moving, the ignition head is also blocked and stops moving. Then, the piezoelectric ceramics are pulled to stop moving through the starting line, preventing the piezoelectric ceramics and the installation cylinder from spraying out and causing a safety accident.

Beneficial effects of the present invention:

The present invention integrates the detection, starting and pressure relief functions into a smaller area by arranging an installation cylinder, piezoelectric ceramics and a glass bulb temperature-sensitive knocking device in the area where the pressure relief groove is located. The structure is simple, the detection is sensitive and the starting is safe. In the case of an abnormal pressure surge, the piezoelectric ceramics and the installation cylinder can be ejected in time to expose the pressure relief groove, thereby realizing the pressure relief process. Moreover, during the installation process, the upper end of the starter 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. The starting wire threading 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 ceramics and the installation cylinder from ejecting 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, in which a fire extinguishing agent 2 is arranged, a nozzle 3 is opened at the front end of the shell 1, and a coolant 9 is also arranged between the top surface of the fire extinguishing agent 2 and the nozzle 3; the end surface of the fire extinguishing agent 2 is in contact with an ignition head 4, and the ignition head 4 is a bridgeless ignition head. The 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 the piezoelectric ceramic 5. The piezoelectric ceramic 5 is installed in the pressure relief groove 6 at the front end of the shell 1, and a glass bulb temperature sensing knocking device 7 is arranged 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.

Preferably, the ignition head 4 is embedded in an ignition powder bag 12, and aerosol generating agent powder is provided in the ignition powder bag 12. In this 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, arc jumping will occur after providing a certain current or induction current to start the contacting ignition powder. In this embodiment, the ignition powder bag 12 is used as the ignition powder, which embeds 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 to ignite the nearby fire extinguishing agent 2, which greatly improves the probability of successful start of the ignition head 4.

Preferably, the fire extinguishing agent 2 is an aerosol generating agent powder or a powder column structure formed by pressing the aerosol generating agent powder. 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 generates gas quickly, and the other is a pressed powder column structure, which burns more steadily and generates gas steadily. In actual production, it can be selected according to actual conditions.

Preferably, a partition net 10 is provided on both 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 coolant 9 can cool down the high-temperature fire extinguishing material generated by the ignition of the fire extinguishing agent 2 to prevent the temperature ejected from the nozzle 3 from being too high. In this embodiment, the coolant 9 itself is granular, so the partition nets 10 on the upper and lower sides can play a limiting role. In this embodiment, there is no fixed connection between the partition net 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 member 11 can prevent the partition net 10 on the lower side from directly pressing the area where the ignition head 4 is located, thereby preventing it from affecting its ignition process 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), a fire extinguishing agent (2) is arranged in the shell (1), a nozzle (3) is provided at the front end of the shell (1), and a coolant (9) is provided between the top surface of the fire extinguishing agent (2) and the nozzle (3); the device is characterized in that: the end surface 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 the fire extinguishing agent (2) is an aerosol generating agent powder or a powder column structure formed by pressing an aerosol generating agent powder. The detection-activated pressure-relief integrated aerosol fire extinguishing device according to claim 1 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 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. A pressure relief method for a fire extinguishing device with detection, activation and pressure relief as claimed in any one of claims 1 to 8, characterized in that it comprises the following steps: S1: During the fire extinguishing process, if the pressure in the housing (1) increases abnormally, the mounting cylinder (8) and the piezoelectric ceramic (5) are separated upward from the pressure relief groove (6) under the action of the gas 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 net (10) on the lower side, the partition net (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 starting line (4.1), thereby preventing the piezoelectric ceramic (5) and the installation cylinder (8) from spraying out and causing a safety accident.