Reliable aerosol fire extinguishing device and fire extinguishing method

Abstract

A reliable aerosol fire extinguishing device and a fire extinguishing method. The device comprises an upper cover, a lower cover and a cylinder, wherein an aerosol fire extinguishing generating agent is provided on the lower cover, and the aerosol fire extinguishing generating agent is in contact with an actuating mechanism, characterized in that a cooling cartridge is provided in the cylinder and contains a coolant; the bottom of the cooling cartridge is connected to the inner wall of the cylinder by means of a spacer mesh; a piston ring is sleeved on the cooling cartridge, and the piston ring is located between the cooling cartridge and the cylinder; and several through holes are provided in the outer wall of the cooling cartridge. The piston ring can prevent the outer wall of the cooling cartridge from being extensively blocked by a molten coolant; by means of the piston ring continuously moving upwards, the release stability of the aerosol fire extinguishing agent can be ensured, and the probability of the aerosol fire extinguishing agent being excessively cooled can also be reduced.

Description

Reliable aerosol fire extinguishing device and fire extinguishing method Technical Field

[0001] The present invention belongs to the field of fire extinguishing devices, and in particular relates to a reliable aerosol fire extinguishing device and a fire extinguishing method. Background Art

[0002] Traditional aerosol fire extinguishing devices typically use physical coolants for cooling. However, physical coolants cool the extinguishing medium through heat exchange. Therefore, aerosol fire extinguishing devices on the market have gradually begun to use chemical coolants for cooling. Chemical coolants are effective, but they have a major problem: molten chemical coolants can clog the discharge channel, thereby affecting the release of the fire extinguishing agent. Another minor problem is that the coolant contacts the aerosol fire extinguishing agent activation surface, absorbing the activation energy and causing activation failure.

[0003] Traditional large-scale aerosol fire extinguishing devices usually contain multiple aerosol fire extinguishing agents, all of which are equipped with activation mechanisms. Once a structure among the multiple activation mechanisms fails, the fire extinguishing capability of the fire extinguishing device may be greatly reduced. Technical issues

[0004] In view of the technical problems existing in the background technology, the reliable aerosol fire extinguishing device and fire extinguishing method provided by the present invention can prevent the outer wall of the cooling barrel from being blocked by the molten coolant on a large scale. The continuous upward movement of the piston ring can ensure the release stability of the aerosol fire extinguishing agent, and at the same time can reduce the probability of overcooling of the aerosol fire extinguishing agent. Technical Solutions

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve them.

[0006] A reliable aerosol fire extinguishing device comprises an upper cover, a lower cover and a cylinder. The lower cover is provided with an aerosol fire extinguishing agent, which contacts a starting mechanism. A cooling barrel is provided in the cylinder, which is filled with coolant. The bottom of the cooling barrel is connected to the inner wall of the cylinder through a partition net. A piston ring is sleeved on the cooling barrel and is located between the cooling barrel and the cylinder. A plurality of through holes are provided on the outer wall of the cooling barrel. A diffusion portion is provided downwardly from the bottom of the cooling barrel.

[0007] Preferably, the aerosol fire extinguishing agent includes a plurality of aerosol powder columns arranged flatly, and the aerosol powder column located in the middle is in contact with the starting mechanism, and the starting mechanism is in contact with a heat-sensitive wire, which passes through the lower cover.

[0008] Preferably, the diffuser is trumpet-shaped and is used to reflect heat onto the aerosol charge at the edge.

[0009] Preferably, the cylinder body is coaxial with the cooling barrel, the inner wall of the piston ring is in contact with the outer wall of the cooling barrel, and the outer wall of the piston ring is in contact with the inner wall of the cylinder body.

[0010] Preferably, the bottom of the cooling barrel is a sealed structure, and a diffusion portion is provided downwardly at the bottom of the cooling barrel.

[0011] A reliable fire extinguishing method using an aerosol fire extinguishing device, comprising the following steps:

[0012] Step 1: When the activation mechanism activates the aerosol fire extinguishing agent, the aerosol fire extinguishing agent releases a large amount of aerosol fire extinguishing agent. The heat of the first activated aerosol fire extinguishing agent column is reflected to other aerosol fire extinguishing agent columns through the diffusion unit, thereby activating all the aerosol fire extinguishing agent columns;

[0013] Step 2: The aerosol fire extinguishing agent passes through the screen and, blocked by the piston ring, passes through the outer wall of the cooling barrel and enters the interior of the cooling barrel. The coolant in the cooling barrel cools the aerosol fire extinguishing agent and is sprayed from the cooling barrel to the upper part of the piston ring and further out of the aerosol fire extinguishing device.

[0014] Step 3. The area of ​​coolant close to the aerosol fire extinguishing agent usually evaporates gradually, while the area far away from the aerosol fire extinguishing agent usually melts. The molten coolant flowing downward will cause the coolant in the lower part of the piston ring to be blocked, causing the pressure in the area below the piston ring to increase. When the pressure increases to a preset value, the piston ring moves up, and the space below the piston ring is connected to the space of the cooling barrel. The molten part of the coolant gradually evaporates and absorbs heat under the high temperature of the lower part of the piston ring. When the coolant above the piston ring further melts and causes blockage, the piston ring continues to move up, and so on, thereby improving the utilization rate of the coolant inside the fire extinguishing device. Beneficial effects

[0015] The present invention can achieve the following beneficial effects:

[0016] 1. The molten coolant flowing downward will cause the coolant near the piston to be blocked, increasing the pressure in the area below the piston ring. When the pressure increases to a preset value, the piston ring moves upward, and the space below the piston ring is connected to the space of the cooling barrel. The molten part of the coolant gradually evaporates and absorbs heat under the high temperature below the piston ring. When the coolant above the piston ring further melts and causes blockage, the piston ring continues to move upward, and this cycle repeats, thereby improving the utilization rate of the coolant inside the fire extinguishing device.

[0017] 2. The coolant and the aerosol fire extinguishing agent will not come into contact over a large area in a short period of time, but will continue to come into contact over a small area, thus avoiding excessive cooling of the aerosol fire extinguishing agent.

[0018] 3. The diffusion part is used to reflect heat to the aerosol charge column at the edge, so that the aerosol charge column is less likely to fail to start. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and examples:

[0020] FIG1 is a cross-sectional view of the present invention;

[0021] FIG2 is a first diagram of the connection structure between the cooling barrel and the partition screen of the present invention;

[0022] FIG3 is a second diagram of the connection structure between the cooling barrel and the partition screen of the present invention;

[0023] Figure 4 is a diagram of the present invention, the cooling barrel and the screen connection structure diagram three;

[0024] FIG5 is a diagram showing the effect of the aerosol drug column being laid flat.

[0025] In the figure: upper cover 1, lower cover 2, cylinder 3, aerosol fire extinguishing agent 4, cooling barrel 5, partition 6, starting mechanism 7, piston ring 8, diffuser 9, coolant 10, through hole 11, aerosol charge 12. Modes for Carrying Out the Invention

[0026] Example 1:

[0027] The preferred solution is shown in Figures 1 to 4. A reliable aerosol fire extinguishing device includes an upper cover 1, a lower cover 2, and a cylinder 3. The upper cover 1 and the lower cover 2 are detachably mounted on both ends of the cylinder 3. The upper cover 1 is provided with an outlet for the diffusion of the aerosol fire extinguishing agent. The lower cover 2 is provided with an aerosol fire extinguishing generator 4. The aerosol fire extinguishing generator 4 contacts the starting mechanism. After the aerosol fire extinguishing generator 4 is activated by the starting mechanism, a mist-like aerosol fire extinguishing agent is generated. A cooling barrel 5 is provided in the cylinder 3. The cooling barrel 5 is filled with coolant. The bottom of the cooling barrel 5 is connected to the inner wall of the cylinder 3 through a partition 6. The bottom of the cooling barrel 5 is a sealed structure, and a diffusion portion 9 is provided downwardly at the bottom of the cooling barrel 5. A piston ring 8 is sleeved on the cooling barrel 5 and is located between the cooling barrel 5 and the cylinder 3. The outer wall of the cooling barrel 5 is provided with a plurality of through holes.

[0028] The piston ring 8 has a certain thickness and thermal insulation effect. On the one hand, it can prevent the aerosol fire extinguishing agent from directly entering the upper half of the cylinder 3, and on the other hand, it can prevent most heat from being transferred to the upper half of the cylinder 3. Preferably, the piston ring 8 is made of a material with a relatively high density to ensure that the piston ring 8 has a certain weight. When the air pressure below the piston ring 8 exceeds the weight of the piston ring 8 itself, the piston ring 8 moves upward.

[0029] The aerosol fire extinguishing agent 4 includes a plurality of aerosol powder columns 12 arranged flatly. The aerosol powder column 12 located in the middle contacts the starting mechanism. The starting mechanism contacts a heat-sensitive wire, and the heat-sensitive wire passes through the lower cover 2.

[0030] The aerosol generator is a prior art, for example, the invention patent disclosed in Chinese Patent Publication No. CN101745195B is "An aging-resistant aerosol generator and its preparation process", which discloses that the aerosol generator is composed of an oxidant, a reducing agent, and a binder. The oxidant is potassium nitrate, the binder is phenolic resin, and the reducing agent is melamine. The mass percentages thereof are: potassium nitrate 74% to 80%, phenolic resin 8% to 15%, and the balance is melamine.

[0031] Its preparation method is:

[0032] Step 1: dissolving phenolic resin in ethanol to prepare a phenolic resin solution with a mass concentration of 40% to 55%;

[0033] Step 2: Grind the oxidizing agent and reducing agent to a fineness of 80-200 standard mesh, mix them according to the required proportion, and sieve them through 80-200 mesh three times to make them evenly mixed;

[0034] Step 3: Then add the phenolic resin solution to the mixed powder, stir for 10 minutes, and then use a 40-mesh screen to force granulate. Then dry the agent in an environment with a temperature of 40°C and a relative humidity of less than 20% until the volatile components are less than 1%;

[0035] Step 4: The dried medicine is pressed under a pressure of 10 MPa to form an aerosol generating agent column structure.

[0036] The diffusion part 9 is trumpet-shaped and has a smooth surface. The diffusion part 9 is used to reflect heat to the aerosol charge 12 located at the edge.

[0037] The cylinder 3 is coaxial with the cooling barrel 5 , the inner wall of the piston ring 8 is in contact with the outer wall of the cooling barrel 5 , and the outer wall of the piston ring 8 is in contact with the inner wall of the cylinder 3 .

[0038] Here's how it works:

[0039] 1. When the starting mechanism starts the aerosol fire extinguishing agent 4, the aerosol fire extinguishing agent 4 releases a large amount of aerosol fire extinguishing agent. The heat of the first started charge is reflected to other aerosol fire extinguishing agent 4 charges through the diffusion part, thereby starting all the aerosol fire extinguishing agent charges.

[0040] 2. The aerosol fire extinguishing agent passes through the partition net and enters the interior of the cooling barrel through the outer wall of the cooling barrel under the obstruction of the piston ring. The coolant in the cooling barrel cools the aerosol fire extinguishing agent and sprays it from the cooling barrel to the upper part of the piston ring and further out of the fire extinguishing device.

[0041] 3. The area of ​​coolant close to the aerosol fire extinguishing agent 4 usually evaporates gradually, while the area far away from the aerosol fire extinguishing agent 4 usually melts. The molten coolant flowing downward will cause the coolant near the piston to be blocked, causing the pressure in the area below the piston ring to increase. When the pressure increases to a preset value, the piston ring moves up, and the space below the piston ring is connected to the space of the cooling barrel. The molten part of the coolant gradually evaporates and absorbs heat under the high temperature of the lower part of the piston ring. When the coolant above the piston ring further melts and causes blockage, the piston ring continues to move up, and this cycle repeats, thereby improving the utilization rate of the coolant inside the fire extinguishing device.

[0042] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. In other words, equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A reliable aerosol fire extinguishing device, comprising an upper cover (1), a lower cover (2) and a cylinder (3), wherein an aerosol fire extinguishing generating agent (4) is provided on the lower cover (2), and the aerosol fire extinguishing generating agent (4) is in contact with a starting mechanism (7), characterized in that: A cooling barrel (5) is provided in the cylinder (3), and a coolant (10) is filled in the cooling barrel (5). The bottom of the cooling barrel (5) is connected to the inner wall of the cylinder (3) through a partition net (6). A piston ring (8) is sleeved on the cooling barrel (5), and the piston ring (8) is located between the cooling barrel (5) and the cylinder (3). The outer wall of the cooling barrel (5) is provided with a plurality of through holes (11). A diffuser (9) is provided downwardly at the bottom of the cooling barrel (5).

2. The reliable aerosol fire extinguishing device according to claim 1, characterized in that: The aerosol fire extinguishing agent (4) comprises a plurality of aerosol powder columns (12) arranged flat, wherein the aerosol powder column (12) located in the middle contacts the starting mechanism (7), and the starting mechanism (7) contacts a heat-sensitive wire, which passes through the lower cover (2).

3. The reliable aerosol fire extinguishing device according to claim 2, characterized in that: The diffusion portion (9) is trumpet-shaped and is used to reflect heat onto the aerosol medicine column (12) located at the edge.

4. The reliable aerosol fire extinguishing device according to claim 1, characterized in that: The cylinder (3) and the cooling barrel (5) are coaxial, the inner wall of the piston ring (8) is in contact with the outer wall of the cooling barrel (5), and the outer wall of the piston ring (8) is in contact with the inner wall of the cylinder (3).

5. The reliable aerosol fire extinguishing device according to claim 1, characterized in that: The bottom of the cooling barrel (5) is a sealing structure.

6. A fire extinguishing method using a reliable aerosol fire extinguishing device according to any one of claims 1 to 5, characterized by the following steps: Step 1: When the starting mechanism (7) starts the aerosol fire extinguishing agent (4), the aerosol fire extinguishing agent (4) releases a large amount of aerosol fire extinguishing agent, and the heat of the first aerosol charge column (12) started is reflected to other aerosol charge columns (12) through the diffusion part, thereby starting all the aerosol charge columns (12); Step 2, the aerosol fire extinguishing agent passes through the partition net (6), passes through the outer wall of the cooling barrel (5) under the obstruction of the piston ring (8), enters the interior of the cooling barrel (5), and the coolant (10) therein cools the aerosol fire extinguishing agent, and is sprayed from the cooling barrel (5) to the upper part of the piston ring (8), and further sprays out of the aerosol fire extinguishing device; Step 3: The area of ​​the coolant (10) close to the aerosol fire extinguishing agent (4) usually evaporates gradually, while the area away from the aerosol fire extinguishing agent (4) usually melts. The melted coolant (10) flows downward, causing the coolant (10) below the piston ring (8) to be blocked, thereby increasing the pressure in the area below the piston ring (8). When the pressure increases to a preset value, the piston ring (8) moves upward, and the space below the piston ring (8) is connected to the space of the cooling barrel (5). The melted part of the coolant (10) gradually evaporates and absorbs heat under the high temperature below the piston ring (8). When the coolant (10) above the piston ring (8) further melts and causes blockage, the piston ring (8) continues to move upward, and so on and so forth, thereby improving the utilization rate of the coolant (10) inside the fire extinguishing device.

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