Fire extinguishing device with pressure relief and sealing functions and fire extinguishing method thereof

Abstract

The invention discloses a fire extinguishing device with pressure relief and sealing functions and a fire extinguishing method thereof, comprising a shell body, the front side of the shell body is connected to an outer cover, a fire extinguishing agent is arranged in the shell body, the fire extinguishing agent is connected to the end of a starting component, a plurality of L-shaped nozzles are opened on the side of the outer cover, an inner cover is arranged inside the outer cover, a plurality of spray holes matched with the L-shaped nozzles are arranged on the side of the inner cover, and a rotating cover mechanism for rotating the inner cover is arranged on the inner side of the outer cover and the outer side of the inner cover; the invention can maintain good sealing before fire extinguishing, will not affect spraying after starting, and can relieve pressure in time.

Description

Technical Field

[0001] The invention relates to the technical field of fire fighting, and in particular to a fire extinguishing device with pressure relief and sealing functions and a fire extinguishing method thereof. Background Art

[0002] During the transportation, use and storage of fire extinguishing devices, the fire extinguishing agent may be affected by environmental factors such as high humidity and salt corrosion, which may cause the fire extinguishing agent to become ineffective. Therefore, the airtightness of the fire extinguishing device will affect the overall life of the fire extinguishing device. Traditional sealing methods usually use conventional means such as sealing plugs and pressure relief diaphragms, but the sealing materials themselves are also affected by environmental factors, and the sealing materials may also be damaged during transportation and bumps. Therefore, a fire extinguishing device with good sealing performance that will not affect the spraying after startup is needed. In addition, the internal pressure of existing fire extinguishing devices increases sharply during the startup phase, and there is a risk of explosion. Therefore, how to relieve pressure in time during the startup phase of the fire extinguishing device also needs to be considered. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a fire extinguishing device with pressure relief and sealing functions, which can maintain good sealing before fire extinguishing, will not affect the spraying after startup, and can relieve pressure in time.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a fire extinguishing device with pressure relief and sealing functions, comprising a shell, the front side of the shell is connected to an outer cover, a fire extinguishing agent is arranged in the shell, the fire extinguishing agent is connected to the end of the starting component, a plurality of L-shaped nozzles are opened on the side of the outer cover, an inner cover is arranged inside the outer cover, a plurality of spray holes matching the L-shaped nozzles are arranged on the side of the inner cover, and a screw-cover mechanism for rotating the inner cover is arranged on the inner side of the outer cover and the outer side of the inner cover.

[0005] Preferably, the screw-on cover mechanism includes a compression spring arranged between the top of the inner cover and the top of the outer cover, the outer surface of the inner cover is covered with a sliding ring that slides with the inner cover, a plurality of inclined push rods are vertically provided on the outer edge of the sliding ring, a plurality of inclined follower rods are vertically provided on the outer side of the inner cover, the inclined surface at the top of the inclined push rod cooperates with the inclined surface at the bottom of the inclined follower rod, a plurality of limiting grooves are provided on the inner side wall of the outer cover, the gap channels between the plurality of limiting grooves cooperate with the inclined follower rod and the inclined push rod, and an inclined groove is provided on the top of the limiting groove.

[0006] Preferably, the outer cover and the inner cover are both cylindrical structures with a closed top and an open bottom, and the front side of the shell is threadedly connected to the lower side of the outer cover.

[0007] Preferably, the bottom of the inner cover forms a flange outward, the top of the flange cooperates with the bottom of the sliding ring, and the bottom of the flange abuts against the front end of the shell.

[0008] Preferably, the outer edge of the sliding ring is evenly and vertically arranged with a plurality of inclined push rods in a circular array, the outer side of the inner cover is evenly and vertically arranged with a plurality of inclined follower rods in a circular array, the inner side wall of the outer cover is evenly and vertically arranged with a plurality of limit slots in a circular array, the side of the outer cover is evenly and vertically arranged with a plurality of L-shaped nozzles in a circular array, and the side of the inner cover is evenly and vertically arranged with a plurality of spray holes in a circular array.

[0009] Preferably, one end of the L-shaped nozzle is a pressure relief area, and the other end is a spraying area.

[0010] Preferably, the starting component is an electric ignition head or a thermal wire structure.

[0011] Preferably, the fire extinguishing agent includes a gas generating agent located at the bottom and a dry powder fire extinguishing agent located at the top.

[0012] Preferably, the fire extinguishing agent is an aerosol fire extinguishing agent or a charge made of an aerosol fire extinguishing agent.

[0013] In addition, the present invention also discloses a fire extinguishing method of the fire extinguishing device with pressure relief and sealing functions, which comprises the following steps:

[0014] S1: Before the fire occurs, the inner cover remains in place due to the elastic force of the compressed spring. At this time, the L-shaped nozzle and the nozzle hole are staggered, thereby forming a seal inside the shell;

[0015] S2: When a fire occurs, the starting component ignites the fire extinguishing agent. After the fire extinguishing substance is produced, the pressure in the shell increases suddenly, and the pressure on the inner cover is greater than the elastic force of the compression spring, thereby pushing the inner cover to move in the direction of the compression spring;

[0016] S3: During the movement of the inner cover, the sliding ring is driven to move together, so that the inclined surface push rod and the inclined surface follower rod also move together in the gap channel between the plurality of limit slots;

[0017] S4: When the flange at the bottom of the inner cover moves to contact the bottom of the limit slot, the inner cover stops moving. At this time, the pressure relief area of ​​the L-shaped nozzle coincides with the nozzle hole, and the top inclined surface of the inclined surface push rod and the bottom inclined surface of the inclined surface follower rod are parallel to the inclined surface of the inclined slot to form a large inclined surface;

[0018] S5: The fire extinguishing substance in the shell is sprayed out from the pressure relief area and the spray hole of the L-shaped nozzle, and the pressure in the shell decreases. When the pressure on the inner cover is less than the elastic force of the compression spring, the inner cover moves away from the compression spring.

[0019] S6: The bottom slope of the inclined follower rod on the outside of the inner cover will press against the top slope of the inclined push rod. Under the influence of the reaction force, the bottom slope of the inclined follower rod moves down along the large slope formed by the top slope of the inclined push rod and the inclined groove. During the downward movement, the inner cover will rotate accordingly. Finally, the bottom slope of the inclined follower rod stays on the inclined groove. At this time, the spraying area of ​​the L-shaped nozzle coincides with the spray hole.

[0020] S7: The fire extinguishing material in the shell is continuously sprayed out from the spraying area and the spray hole of the L-shaped nozzle to realize the fire extinguishing process.

[0021] Beneficial effects of the present invention:

[0022] 1. The present invention can maintain good sealing before fire extinguishing, will not affect the spraying after starting, and can release pressure in time;

[0023] 2. Since the present invention is provided with a rotating cover mechanism, the inner cover can rotate when the fire extinguishing device is started, so that the pressure relief area of ​​the L-shaped nozzle can be overlapped with the spray hole first, and then the spraying area of ​​the L-shaped nozzle can be overlapped with the spray hole, thereby realizing the dual functions of pressure relief and spraying.

[0024] 3. The L-shaped structure of the L-shaped nozzle in the present invention is cleverly designed and has two functions: one is that it can release pressure in time during the start-up phase of the fire extinguishing device; the other is that it can normally spray fire extinguishing materials to carry out the fire extinguishing process during the fire extinguishing phase.

[0025] 4. The compression spring in the screw cap mechanism of the present invention can be designed according to the actual eruption pressure of the fire extinguishing agent. The elastic force of the compression spring is easier to control. Through the fire extinguishing agent eruption test, a compression spring with corresponding elastic force is selected so that it can be compressed and shortened in the startup stage, and rebound during normal eruption to press the inner cover downward, so that its inclined surface moves downward along the large inclined surface formed by the inclined surface of the top inclined surface of the inclined surface pushing rod and the inclined surface of the inclined groove. During the downward movement, the inner cover will rotate accordingly. Therefore, the introduction of the compression spring makes it simple to realize the above-mentioned downward movement process, which is conducive to the production and promotion and application of the fire extinguishing device of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the internal structure of a fire extinguishing device with pressure relief and sealing functions;

[0027] Figure 2 for Figure 1 An enlarged structural diagram of the area where the middle and outer covers are located;

[0028] Figure 3 for Figure 2 Schematic diagram of the exploded structure of the outer cover, inner cover and sliding ring;

[0029] Figure 4When the fire extinguishing device is in the startup phase Figure 2 Schematic diagram of the structure when the pressure relief area of ​​the middle L-shaped nozzle coincides with the nozzle hole;

[0030] Figure 5 When the fire extinguishing device is in the fire extinguishing stage Figure 2 Schematic diagram of the structure of the middle L-shaped nozzle when the spray area coincides with the spray hole. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] like Figures 1 to 5 As shown, a fire extinguishing device with pressure relief and sealing functions includes a shell 1, the front side of the shell 1 is connected to an outer cover 2, a fire extinguishing agent 3 is arranged in the shell 1, and the fire extinguishing agent 3 is connected to the end of a starting component 4, a plurality of L-shaped nozzles 5 are opened on the side of the outer cover 2, an inner cover 6 is arranged inside the outer cover 2, and a plurality of spray holes 7 cooperating with the L-shaped nozzles 5 are arranged on the side of the inner cover 6, and a screw cover mechanism 8 for rotating the inner cover 6 is arranged on the inner side of the outer cover 2 and the outer side of the inner cover 6.

[0033] Preferably, the screw-on cover mechanism 8 comprises a compression spring 8.1 arranged between the top of the inner cover 6 and the top of the outer cover 2, the outer surface of the inner cover 6 is sleeved with a sliding ring 8.2 which is slidably matched therewith, a plurality of inclined push rods 8.3 are vertically arranged on the outer edge of the sliding ring 8.2, a plurality of inclined follower rods 8.4 are vertically arranged on the outer side of the inner cover 6, the inclined surface at the top of the inclined push rod 8.3 cooperates with the inclined surface at the bottom of the inclined follower rod 8.4, a plurality of limiting grooves 8.5 are arranged on the inner side wall of the outer cover 2, the gap channels 8.6 between the plurality of limiting grooves 8.5 cooperate with the inclined follower rod 8.4 and the inclined push rod 8.3, and an inclined groove 8.7 is provided on the top of the limiting groove 8.5.

[0034] Preferably, the outer cover 2 and the inner cover 6 are both cylindrical structures with a closed top and an open bottom, and the front side of the shell 1 is threadedly connected to the lower side of the outer cover 2. In this embodiment, the front side of the shell 1 is threadedly connected to the lower side of the outer cover 2, which can facilitate the installation process and facilitate the arrangement of the screw cap mechanism 8 in the fire extinguishing device.

[0035] Preferably, the bottom of the inner cover 6 forms a flange 6.1 outwardly, the top of the flange 6.1 cooperates with the bottom of the sliding ring 8.2, and the bottom of the flange 6.1 contacts the front end of the shell 1. After the flange 6.1 is provided, when the inner cover 6 moves up, the sliding ring 8.2 can be driven to move up; at the same time, before a fire occurs, the inner cover 6 needs to keep its position unchanged due to the elastic force of the compression spring 8.1, and at this time, the bottom of the flange 6.1 contacts the front end of the shell 1, which can play a role in supporting the inner cover 6.

[0036] Preferably, the outer edge of the sliding ring 8.2 is evenly and vertically arranged with a plurality of inclined push rods 8.3 in a circular array, the outer side of the inner cover 6 is evenly and vertically arranged with a plurality of inclined follower rods 8.4 in a circular array, the inner wall of the outer cover 2 is evenly and vertically arranged with a plurality of limit slots 8.5 in a circular array, the side of the outer cover 2 is evenly and vertically arranged with a plurality of L-shaped nozzles 5, and the side of the inner cover 6 is evenly and vertically arranged with a plurality of spray holes 7 in a circular array.

[0037] Preferably, one end of the L-shaped nozzle 5 is a pressure relief area, and the other end is a spraying area. The L-shaped nozzle 5 in the present invention has two functions: one is to release pressure in time during the start-up phase of the fire extinguishing device, and the other is to spray fire extinguishing materials normally during the normal fire extinguishing phase to extinguish the fire.

[0038] Preferably, the starting component 4 is an electric ignition head or a thermistor structure. When the starting component 4 is an electric ignition head structure, it is connected to the fire detection device, which is a temperature sensor and / or a smoke sensor. When a fire, overheating, etc. occurs, the fire detection device detects the high temperature environment caused by the fire, and sends a signal to the microprocessor, and the microprocessor controls the starting component 4 to ignite the fire extinguishing agent. When the starting component 4 is a thermistor structure, since the structure of the thermistor is relatively simple, when the thermistor is used, it can be automatically started when a fire occurs, and the thermistor directly ignites the fire extinguishing agent without the need for additional fire detection devices and other external equipment.

[0039] Preferably, if Figure 1 As shown, the fire extinguishing agent 3 includes a gas generating agent 3.1 at the bottom and a dry powder fire extinguishing agent 3.2 at the top. Preferably, the gas generating agent 3.1 can be an aerosol generating agent. When the starting component 4 triggers the gas generating agent 3.1, the gas generating agent 3.1 generates a large amount of gas aerosol, forming a large pressure, which can make the dry powder fire extinguishing agent 3.2 spray out and participate in the fire extinguishing process.

[0040] Preferably, the fire extinguishing agent 3 is an aerosol fire extinguishing agent or a powder column made of an aerosol fire extinguishing agent. When such an aerosol fire extinguishing agent is selected as the fire extinguishing agent 3, after the starting component 4 ignites the aerosol fire extinguishing agent, an aerosol fire extinguishing substance is directly formed and then sprayed out to participate in the fire extinguishing process.

[0041] In addition, the present invention also discloses a fire extinguishing method of the fire extinguishing device with pressure relief and sealing functions, which comprises the following steps:

[0042] S1: Before the fire occurs, the inner cover 6 remains in position due to the elastic force of the compression spring 8.1. At this time, the L-shaped nozzle 5 and the nozzle hole 7 are in a staggered state (such as Figure 1 and 2 As shown), thereby forming a seal inside the housing 1;

[0043] S2: When a fire occurs, the starting component 4 ignites the fire extinguishing agent 3. After the fire extinguishing substance is produced, the pressure in the housing 1 increases suddenly, and the pressure on the inner cover 6 is greater than the elastic force of the compression spring 8.1, thereby pushing the inner cover 6 to move in the direction of the compression spring 8.1;

[0044] S3: During the movement of the inner cover 6, the sliding ring 8.2 is driven to move together, so that the inclined surface push rod 8.3 and the inclined surface follower rod 8.4 also move together in the gap channel 8.6 between the plurality of limit slots 8.5;

[0045] S4: When the flange 6.1 at the bottom of the inner cover 6 moves to contact the bottom of the limit slot 8.5, the inner cover 6 stops moving. At this time, the pressure relief area of ​​the L-shaped nozzle 5 coincides with the nozzle hole 7 (such as Figure 4 As shown), the top inclined surface of the inclined surface push rod 8.3 and the bottom inclined surface of the inclined surface follower rod 8.4 are parallel to the inclined surface where the inclined groove 8.7 is located to form a large inclined surface;

[0046] S5: the fire extinguishing substance in the housing 1 is sprayed out from the pressure relief area of ​​the L-shaped nozzle 5 and the spray hole 7, and the pressure in the housing 1 decreases. When the pressure on the inner cover 6 is less than the elastic force of the compression spring 8.1, the inner cover 6 moves in a direction away from the compression spring 8.1;

[0047] S6: The bottom slope of the inclined follower rod 8.4 on the outside of the inner cover 6 will press against the top slope of the inclined push rod 8.3. Under the influence of the reaction force, the bottom slope of the inclined follower rod 8.4 moves downward along the large slope formed by the top slope of the inclined push rod 8.3 and the slope of the inclined groove 8.7. During the downward movement, the inner cover 6 will rotate accordingly. Finally, the bottom slope of the inclined follower rod 8.4 stays on the slope of the inclined groove 8.7. At this time, the spraying area of ​​the L-shaped nozzle 5 coincides with the spray hole 7 (such as Figure 5 As shown); in this embodiment, there is a certain friction between the surface of the inclined push rod 8.3 of the sliding ring 8.2 and the inner wall of the gap channel 8.6, so that when the bottom inclined surface of the inclined follower rod 8.4 moves downward along the top inclined surface of the inclined push rod 8.3, the inclined push rod 8.3 will not slide downward in the gap channel 8.6.

[0048] S7: The fire extinguishing substance in the housing 1 is continuously sprayed out from the spraying area of ​​the L-shaped nozzle 5 and the spray hole 7 to realize the fire extinguishing process.

[0049] 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

1. A fire extinguishing device with pressure relief and sealing functions, comprising a housing (1), the front side of the housing (1) being connected to an outer cover (2), a fire extinguishing agent (3) being arranged in the housing (1), the fire extinguishing agent (3) being connected to a terminal end of a starting component (4), characterized in that: The outer cover (2) is provided with a plurality of L-shaped nozzles (5) on the side thereof, an inner cover (6) is provided inside the outer cover (2), a plurality of spray holes (7) cooperating with the L-shaped nozzles (5) are provided on the side thereof, and a capping mechanism (8) for rotating the inner cover (6) is provided on the inner side of the outer cover (2) and the outer side of the inner cover (6); The screw cap mechanism (8) comprises a compression spring (8.1) arranged between the top of the inner cover (6) and the top of the outer cover (2); the outer surface of the inner cover (6) is sleeved with a sliding ring (8.2) that slidably cooperates with the inner cover; a plurality of inclined surface push rods (8.3) are vertically arranged on the outer edge of the sliding ring (8.2); a plurality of inclined surface follower rods (8.4) are vertically arranged on the outer side of the inner cover (6); the inclined surface at the top of the inclined surface push rod (8.3) cooperates with the inclined surface at the bottom of the inclined surface follower rod (8.4); a plurality of limiting slots (8.5) are arranged on the inner side wall of the outer cover (2); the gap channels (8.6) between the plurality of limiting slots (8.5) cooperate with the inclined surface follower rod (8.4) and the inclined surface push rod (8.3); and an inclined slot (8.7) is provided on the top of the limiting slot (8.5); The starting component (4) is an electric ignition head or a thermal wire structure.

2. A fire extinguishing device with pressure relief and sealing functions according to claim 1, characterized in that: The outer cover (2) and the inner cover (6) are both cylindrical structures with a closed top and an open bottom, and the front side of the shell (1) is threadedly connected to the lower side of the outer cover (2).

3. A fire extinguishing device with pressure relief and sealing functions according to claim 2, characterized in that: The bottom of the inner cover (6) forms a flange (6.1) outwardly, the top of the flange (6.1) cooperates with the bottom of the sliding ring (8.2), and the bottom of the flange (6.1) abuts against the front end of the shell (1).

4. A fire extinguishing device with pressure relief and sealing functions according to claim 2, characterized in that: The outer edge of the sliding ring (8.2) is provided with a plurality of inclined push rods (8.3) evenly arranged vertically in a circular array, the outer side of the inner cover (6) is provided with a plurality of inclined follower rods (8.4) evenly arranged vertically in a circular array, the inner side wall of the outer cover (2) is provided with a plurality of limit slots (8.5) evenly arranged in a circular array, the side of the outer cover (2) is provided with a plurality of L-shaped nozzles (5) evenly arranged in a circular array, and the side of the inner cover (6) is provided with a plurality of nozzle holes (7) evenly arranged in a circular array.

5. A fire extinguishing device with pressure relief and sealing functions according to claim 1, characterized in that: One end of the L-shaped nozzle (5) is a pressure relief area, and the other end is a spraying area.

6. A fire extinguishing device with pressure relief and sealing functions according to claim 1, characterized in that: The fire extinguishing agent (3) comprises a gas generating agent (3.1) located at the bottom and a dry powder fire extinguishing agent (3.2) located at the top.

7. A fire extinguishing device with pressure relief and sealing functions according to claim 1, characterized in that: The fire extinguishing agent (3) is an aerosol fire extinguishing agent or a powder column made of an aerosol fire extinguishing agent.

8. A fire extinguishing method using the fire extinguishing device with pressure relief and sealing functions as claimed in claim 3, characterized in that: It includes the following steps: S1: Before a fire occurs, the inner cover (6) remains in position due to the elastic force of the compression spring (8.1), and the L-shaped nozzle (5) and the nozzle hole (7) are in an interlaced state, thereby forming a seal on the inside of the housing (1); S2: When a fire occurs, the starting component (4) ignites the fire extinguishing agent (3), and after the fire extinguishing substance is produced, the pressure in the housing (1) increases suddenly, and the pressure on the inner cover (6) is greater than the elastic force of the compression spring (8.1), thereby pushing the inner cover (6) to move in the direction of the compression spring (8.1); S3: During the movement of the inner cover (6), the sliding ring (8.2) is driven to move together, so that the inclined surface push rod (8.3) and the inclined surface follower rod (8.4) also move together in the gap channel (8.6) between the plurality of limit slots (8.5); S4: When the flange (6.1) at the bottom of the inner cover (6) moves to contact the bottom of the limit slot (8.5), the inner cover (6) stops moving. At this time, the pressure relief area of ​​the L-shaped nozzle (5) coincides with the nozzle hole (7), and the top inclined surface of the inclined push rod (8.3) and the bottom inclined surface of the inclined follower rod (8.4) are parallel to the inclined surface where the inclined slot (8.7) is located to form a large inclined surface; S5: the fire extinguishing substance in the housing (1) is sprayed out from the pressure relief area and the spray hole (7) of the L-shaped nozzle (5), the pressure in the housing (1) decreases, and when the pressure on the inner cover (6) is less than the elastic force of the compression spring (8.1), the inner cover (6) moves in a direction away from the compression spring (8.1); S6: The bottom slope of the inclined follower rod (8.4) on the outside of the inner cover (6) will press against the top slope of the inclined push rod (8.3). Under the influence of the reaction force, the bottom slope of the inclined follower rod (8.4) moves downward along the large slope formed by the top slope of the inclined push rod (8.3) and the slope of the inclined groove (8.7). During the downward movement, the inner cover (6) will rotate accordingly. Finally, the bottom slope of the inclined follower rod (8.4) stays on the slope of the inclined groove (8.7). At this time, the spraying area of ​​the L-shaped nozzle (5) coincides with the spray hole (7); S7: The fire extinguishing substance in the shell (1) is continuously sprayed out from the spraying area of ​​the L-shaped nozzle (5) and the spray hole (7), thereby realizing the fire extinguishing process.

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