Self-excitation fire extinguishing sheet

Abstract

The invention relates to the technical field of fire extinguishing equipment, in particular to a self-excitation fire extinguishing sheet. According to the technical scheme, the fire extinguishing piece comprises a fire extinguishing piece body and a gum layer arranged on the upper layer of the fire extinguishing piece body, the upper layer of the fire extinguishing piece body is fixedly connected with a reaction box, and a base plate is arranged between the reaction box and the gum layer; a shell is arranged at one corner of the fire extinguishing sheet main body, and a plurality of groups of sensors are arranged in the shell; the reaction box is further filled with a storage balloon, and the storage balloon is further filled with a secondary reactant; the fire extinguishing sheet main body comprises the following component raw materials: perfluorohexanone; nano-scale fireproof aerogel particles; a urea-formaldehyde resin; a curing agent; an alcohol solvent; a polyurethane; and a catalyst. According to the invention, the fire extinguishing sheet main body is timely assisted in explosion when a fire occurs, rapid and efficient fire extinguishing is realized, the residual hydrogen fluoride is harmlessly discharged again, the harm to a human body and a metal material is avoided, and harmless fire extinguishing is realized.

Description

Technical Field

[0001] The invention relates to the technical field of fire extinguishing equipment, in particular to a self-exciting fire extinguishing piece. Background Art

[0002] Self-excited fire extinguishing tablets are a new type of fire extinguishing device. Perfluorohexanone fire extinguishing tablets are an automatic fire extinguishing device that uses special nano-microcapsule compression technology to compress and store perfluorohexanone fire extinguishing agents into thin sheets. It can actively respond and automatically extinguish fires. As long as it is pasted above the fire protection area in advance, once the temperature reaches a certain threshold or an open flame appears, the perfluorohexanone fire extinguishing agent inside will break through the film material and spray out to extinguish the fire. It is easy to install and uses an adhesive backing design. It can be pasted on traditional fire extinguishing blind spots such as electrical cabinets and sockets. Some products can also achieve remote monitoring, and issue remote alarms while starting automatic fire extinguishing, making it easier for managers to control the situation on site. It is generally used for small initial fires in closed or semi-enclosed flammable small spaces, such as new energy batteries, distribution cabinets, meter boxes, charging piles, computer rooms, etc.

[0003] The fire extinguishing tablet proposed in the existing patent CN115382146B uses perfluorohexanone as a fire extinguishing material, which will play a huge role in fire prevention, cooling, fire extinguishing and preventing fires; the perfluorohexanone automatic fire extinguishing tablet has a good fire extinguishing effect in a confined space, but in a confined space without sufficient oxygen supply, it cannot react with the oxygen in the flame, making it difficult to effectively extinguish the fire. In addition, the chemical reaction produced by the perfluorohexanone fire extinguishing tablet will release hydrogen fluoride gas, which has a certain corrosiveness to electrical equipment and may cause damage to electrical appliances, so it is not very suitable for electrical fires. In view of the above reasons, the present invention proposes a self-excitation fire extinguishing tablet that can fully react with decomposed substances. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the background technology and propose a self-exciting fire extinguishing piece in which the decomposed substances can fully react.

[0005] The technical solution of the present invention is: a self-excitation fire extinguishing piece, the fire extinguishing piece comprises a fire extinguishing piece body and a back adhesive layer arranged on the upper layer of the fire extinguishing piece body, the upper layer of the fire extinguishing piece body is fixedly connected with a reaction box, and a substrate is arranged between the reaction box and the back adhesive layer;

[0006] A shell is provided at one corner of the fire extinguishing piece body, and a plurality of groups of sensors are provided in the shell;

[0007] The reaction box is also filled with a storage balloon, and the storage balloon is also filled with a secondary reactant;

[0008] The fire extinguishing tablet body comprises the following component raw materials:

[0009] 90 to 100 parts of perfluorohexanone;

[0010] 1 to 10 parts of nano-scale fireproof aerogel particles;

[0011] 0.9 to 5 parts of urea-formaldehyde resin;

[0012] Curing agent 0.01 to 0.1 parts;

[0013] 0.01 to 0.1 parts of alcohol solvent;

[0014] 1 to 5 parts of polyurethane;

[0015] Catalyst 0.01 to 0.1 parts.

[0016] Optionally, the storage balloon is a spherical capsule made of polyvinyl alcohol, and the storage balloon is filled with either calcium hydroxide or liquid carbon dioxide.

[0017] Optionally, a temperature control switch, a heating wire and a fuse which are communicatively connected to each other are installed in the shell, and the shell is sealed by providing a packaging cover;

[0018] The packaging cover is provided with a plurality of through holes.

[0019] Optionally, a dispersion hole is provided on a side of the reaction box close to the main body of the fire extinguishing piece, a storage cavity is provided in the reaction box, and the storage balloon is filled in the storage cavity.

[0020] Optionally, the fire extinguishing tablet body includes the following component raw materials: 90 parts of perfluorohexanone, 1 part of nano-scale fire-resistant aerogel particles, 0.9 parts of urea-formaldehyde resin, 0.01 parts of curing agent, 0.01 parts of alcohol solvent, 1 part of polyurethane, and 0.01 parts of catalyst.

[0021] Optionally, the fire extinguishing tablet body includes the following component raw materials: 100 parts of perfluorohexanone, 10 parts of nano-scale fire-resistant aerogel particles, 5 parts of urea-formaldehyde resin, 0.1 parts of curing agent, 0.1 parts of alcohol solvent, 5 parts of polyurethane, and 0.1 parts of catalyst.

[0022] Optionally, the fire extinguishing tablet body includes the following component raw materials: 95 parts of perfluorohexanone, 5 parts of nano-scale fire-resistant aerogel particles, 3 parts of urea-formaldehyde resin, 0.05 parts of curing agent, 0.05 parts of alcohol solvent, 3 parts of polyurethane, and 0.05 parts of catalyst.

[0023] Optionally, the particle size range of the nanoscale fireproof aerogel particles is 10-50 nm;

[0024] The curing agent is a mixture of epoxy resin and maleic anhydride;

[0025] The catalyst is a trace amount of metal salt or strong acid.

[0026] Optionally, the fire extinguishing tablet comprises the following preparation steps:

[0027] Material preparation: Prepare the required raw materials: perfluorohexanone, nano-scale fire-retardant aerogel particles, urea-formaldehyde resin, curing agent, alcohol solvent, polyurethane, catalyst;

[0028] Mixed materials: uniformly mix perfluorohexanone, nano-scale fireproof aerogel particles, urea-formaldehyde resin, curing agent, alcohol solvent, polyurethane, and catalyst material in a certain proportion;

[0029] Prepare the base material: guide the mixed material into a mold to form the main body of the fire extinguishing sheet;

[0030] Drying and curing: The main body of the fire extinguishing tablet is dried and cured;

[0031] Fire extinguishing sheet molding: filling the storage balloon into the storage cavity, pressing the substrate on the reaction box, adhering the adhesive layer on the substrate, and pressing the main body of the fire extinguishing sheet and the side of the reaction box away from the substrate into shape;

[0032] Quality inspection: Carry out quality inspection on the prepared fire extinguishing tablets, including fire extinguishing performance test.

[0033] Compared with the prior art, the present invention has the following beneficial technical effects:

[0034] In addition, the chemical reaction produced by perfluorohexanone fire extinguishing tablets will release hydrogen fluoride gas, which is corrosive to electrical equipment and may cause damage to electrical appliances, so it is not suitable for electrical fires.

[0035] The present invention achieves outstanding fire extinguishing effect by improving the material of the main body of the fire extinguishing piece, and provides multiple groups of temperature control elements to ensure timely auxiliary explosion of the main body of the fire extinguishing piece when a fire occurs, thereby achieving rapid and efficient fire extinguishing;

[0036] The present invention can also release the filling inside the storage balloon when the storage balloon ruptures when sensitive to temperature through the setting of the reaction box after the main body of the fire extinguishing piece has fully reacted and fallen off, combined with the setting of the dispersion holes, to achieve the harmless discharge of the residual hydrogen fluoride after the main body of the fire extinguishing piece has reacted again, avoid harm to the human body and metal materials, and achieve harmless fire extinguishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 An overall schematic diagram of the fire extinguishing sheet proposed by the present invention is given;

[0038] Figure 2 for Figure 1 Schematic diagram of the explosion structure;

[0039] Figure 3 for Figure 2 Schematic cross-sectional view of the reaction box.

[0040] Reference numerals:

[0041] 1. Fire extinguishing tablet body; 11. Shell; 12. Temperature control switch; 13. Heating wire; 14. Fuse; 15. Packaging cover;

[0042] 2. Reaction box; 21. Storage chamber; 22. Dispersion hole; 23. Storage balloon;

[0043] 3. Substrate;

[0044] 4. Adhesive layer. DETAILED DESCRIPTION

[0045] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] Embodiment 1

[0047] like Figure 1-3 As shown, a self-excitation fire extinguishing piece proposed by the present invention comprises a fire extinguishing piece body 1 and a back adhesive layer 4 arranged on the upper layer of the fire extinguishing piece body 1, a reaction box 2 is fixedly connected to the upper layer of the fire extinguishing piece body 1, and a substrate 3 is arranged between the reaction box 2 and the back adhesive layer 4;

[0048] A shell 11 is provided at one corner of the fire extinguishing piece body 1, and a plurality of sensors are provided in the shell 11; a temperature control switch 12, a heating wire 13 and a fuse 14 are installed in the shell 11 for communication connection, and the shell 11 is sealed by providing a packaging cover 15; a plurality of through holes are provided on the packaging cover 15;

[0049] A dispersion hole 22 is provided on one side of the reaction box 2 close to the main body 1 of the fire extinguishing piece, a storage chamber 21 is provided in the reaction box 2, and a storage balloon 23 is filled in the storage chamber 21; the reaction box 2 is also filled with a storage balloon 23, and the storage balloon 23 is also filled with a secondary reactant; the storage balloon 23 is a spherical capsule made of polyvinyl alcohol, and the storage balloon 23 is filled with calcium hydroxide; hydrogen fluoride is generated after the main body 1 of the fire extinguishing piece is excited to decompose and extinguish the fire, and at the same time, the flame temperature is still high and the hot gas will enter the storage chamber 21 through the dispersion hole 22, and the storage balloon 23 will dissolve when heated, and the calcium hydroxide filled inside will be spilled, thereby reacting with hydrogen fluoride, and hydrogen fluoride HF reacts with calcium hydroxide slaked lime: calcium fluoride that is insoluble in water can be generated, and the chemical equation is:

[0050] HF+Ca(OH)2→CaF2↓+H2O

[0051] This is a common method for treating hydrogen fluoride waste gas, which is relatively simple to operate and has stable effects;

[0052] The fire extinguishing tablet body 1 includes the following component raw materials: 90 parts of perfluorohexanone, 1 part of nano-scale fireproof aerogel particles, 0.9 parts of urea-formaldehyde resin, 0.01 parts of curing agent, 0.01 parts of alcohol solvent, 1 part of polyurethane, and 0.01 parts of catalyst.

[0053] The particle size range of nanoscale fireproof aerogel particles is 10-50nm;

[0054] The curing agent is a mixture of epoxy resin and maleic anhydride;

[0055] The catalyst is a trace amount of metal salt or strong acid.

[0056] This embodiment also proposes a method for preparing a self-exciting fire extinguishing sheet, which specifically includes the following steps: Material preparation: preparing the required raw materials: perfluorohexanone, nano-scale fire-retardant aerogel particles, urea-formaldehyde resin, curing agent, alcohol solvent, polyurethane, and catalyst;

[0057] Mixed materials: uniformly mix perfluorohexanone, nano-scale fireproof aerogel particles, urea-formaldehyde resin, curing agent, alcohol solvent, polyurethane, and catalyst material in a certain proportion;

[0058] Prepare the base material: guide the mixed material into a mold to form a fire extinguishing sheet body 1;

[0059] Drying and curing: The fire extinguishing piece body 1 is dried and cured;

[0060] Fire extinguishing sheet molding: the storage balloon 23 is filled into the storage cavity 21, and the substrate 3 is pressed on the reaction box 2, and the adhesive layer 4 is adhered on the substrate 3, and at the same time, the fire extinguishing sheet body 1 and the side of the reaction box 2 away from the substrate 3 are pressed into molding;

[0061] Quality inspection: Carry out quality inspection on the prepared fire extinguishing tablets, including fire extinguishing performance test.

[0062] The detailed preparation steps are:

[0063] Nano-scale fireproof aerogel particles, urea-formaldehyde resin and polyurethane were placed in a stirring container and stirred at 500 rpm for 15 minutes.

[0064] Slowly add perfluorohexanone, increase the speed to 800 rpm, and stir for 20 minutes.

[0065] The curing agent, alcohol solvent and catalyst were added in sequence, and stirring was continued at 800 rpm for 10 minutes.

[0066] Pour into the mold and cure at 80℃ for 2 hours.

[0067] Fire extinguishing performance test: After being put into the center of the fire source, the flame is completely extinguished in 35 seconds, and the time for the temperature in the space to drop to a safe range after the fire is extinguished is 210 seconds.

[0068] Embodiment 2

[0069] like Figure 1-3 As shown, this embodiment is a self-excited fire extinguishing sheet proposed on the basis of the first embodiment, and the fire extinguishing sheet body 1 includes the following component raw materials: 100 parts of perfluorohexanone, 10 parts of nano-scale fire-retardant aerogel particles, 5 parts of urea-formaldehyde resin, 0.1 parts of curing agent, 0.1 parts of alcohol solvent, 5 parts of polyurethane, and 0.1 parts of catalyst.

[0070] The preparation steps are the same as those in Example 1.

[0071] Fire extinguishing performance test: After being put into the center of the fire source, the flame is completely extinguished in 45 seconds, and the time for the temperature in the space to drop to a safe range after the fire is extinguished is 250 seconds.

[0072] Embodiment 3

[0073] like Figure 1-3 As shown, this embodiment is a self-excited fire extinguishing sheet proposed on the basis of the first embodiment, and the fire extinguishing sheet body 1 includes the following component raw materials: 95 parts of perfluorohexanone, 5 parts of nano-scale fire-retardant aerogel particles, 3 parts of urea-formaldehyde resin, 0.05 parts of curing agent, 0.05 parts of alcohol solvent, 3 parts of polyurethane, and 0.05 parts of catalyst.

[0074] The preparation steps are the same as those in Example 1.

[0075] Fire extinguishing performance test: In a 10 cubic meter closed space, a fire source of a certain intensity is set. The fire extinguishing tablet is thrown into the center of the fire source. The time from the time of throwing it in to the flame being completely extinguished is 30 seconds, and the time for the temperature in the space to drop to a safe range after the fire is extinguished is 180 seconds.

[0076] Combining the implementation methods of Example 1, Example 2 and Example 3, the following comparative data is obtained:

[0077]

[0078] From the above comparative data, it can be seen that the fire extinguishing effect of the fire extinguishing sheet with each component ratio in Example 3 is relatively good, the flame extinguishing time is the shortest, and the time for the temperature to drop to a safe range is also short; with the increase of the perfluorohexanone content and the change of the proportion of other components, the fire extinguishing effect may be different; but it should be noted that the actual fire extinguishing effect will also be affected by various factors such as the intensity of the fire source and environmental conditions, and the fire extinguishing sheet prepared in this embodiment can fully react the residual hydrogen fluoride gas, reduce environmental pollution, and avoid damage to metal materials and the human respiratory tract. Therefore, the self-excitation fire extinguishing sheet of this embodiment is more suitable for a wider range of scenarios.

[0079] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A self-igniting fire extinguishing piece, comprising a fire extinguishing piece body (1) and a backing adhesive layer (4) arranged on the upper layer of the fire extinguishing piece body (1), characterized in that: A reaction box (2) is fixedly connected to the upper layer of the fire extinguishing sheet body (1), and a base plate (3) is provided between the reaction box (2) and the back adhesive layer (4); A shell (11) is provided at one corner of the fire extinguishing piece body (1), and a plurality of groups of sensors are provided in the shell (11); The reaction box (2) is also filled with a storage balloon (23), and the storage balloon (23) is also filled with a secondary reactant; The fire extinguishing tablet body (1) comprises the following component raw materials: 90 to 100 parts of perfluorohexanone; 1 to 10 parts of nano-scale fireproof aerogel particles; 0.9 to 5 parts of urea-formaldehyde resin; Curing agent 0.01 to 0.1 parts; 0.01 to 0.1 parts of alcohol solvent; 1 to 5 parts of polyurethane; Catalyst 0.01 to 0.1 parts.

2. A self-igniting fire extinguishing piece according to claim 1, characterized in that: The storage balloon (23) is a spherical capsule made of polyvinyl alcohol, and the storage balloon (23) is filled with any one of calcium hydroxide and liquid carbon dioxide.

3. A self-igniting fire extinguishing piece according to claim 1, characterized in that: A temperature control switch (12), a heating wire (13) and a fuse (14) which are communicatively connected to each other are installed in the housing (11), and the housing (11) is sealed by being provided with a packaging cover (15); The packaging cover (15) is provided with a plurality of through holes.

4. A self-igniting fire extinguishing piece according to claim 1, characterized in that: A dispersion hole (22) is provided on a side of the reaction box (2) close to the fire extinguishing piece body (1), a storage cavity (21) is provided in the reaction box (2), and the storage balloon (23) is filled in the storage cavity (21).

5. A self-igniting fire extinguishing piece according to claim 1, characterized in that: The fire extinguishing tablet body (1) comprises the following raw materials: 90 parts of perfluorohexanone, 1 part of nano-scale fireproof aerogel particles, 0.9 parts of urea-formaldehyde resin, 0.01 parts of curing agent, 0.01 parts of alcohol solvent, 1 part of polyurethane, and 0.01 parts of catalyst.

6. A self-igniting fire extinguishing piece according to claim 1, characterized in that: The fire extinguishing tablet body (1) comprises the following raw materials: 100 parts of perfluorohexanone, 10 parts of nano-scale fireproof aerogel particles, 5 parts of urea-formaldehyde resin, 0.1 parts of curing agent, 0.1 parts of alcohol solvent, 5 parts of polyurethane, and 0.1 parts of catalyst.

7. A self-igniting fire extinguishing piece according to claim 1, characterized in that: The fire extinguishing tablet body (1) comprises the following raw materials: 95 parts of perfluorohexanone, 5 parts of nano-scale fireproof aerogel particles, 3 parts of urea-formaldehyde resin, 0.05 parts of curing agent, 0.05 parts of alcohol solvent, 3 parts of polyurethane, and 0.05 parts of catalyst.

8. A self-igniting fire extinguishing piece according to claim 1, characterized in that: The particle size range of the nanoscale fireproof aerogel particles is 10-50nm; The curing agent is a mixture of epoxy resin and maleic anhydride; The catalyst is a trace amount of metal salt or strong acid.

9. A self-igniting fire extinguishing piece according to claim 1, characterized in that: The fire extinguishing tablet comprises the following preparation steps: Material preparation: Prepare the required raw materials: perfluorohexanone, nano-scale fire-retardant aerogel particles, urea-formaldehyde resin, curing agent, alcohol solvent, polyurethane, catalyst; Mixed materials: uniformly mix perfluorohexanone, nano-scale fireproof aerogel particles, urea-formaldehyde resin, curing agent, alcohol solvent, polyurethane, and catalyst material in a certain proportion; Preparation of the substrate: guiding the mixed material into a mold to form a fire extinguishing piece body (1); Drying and curing: the fire extinguishing piece body (1) is dried and cured; Molding of the fire extinguishing sheet: filling the storage balloon (23) into the storage cavity (21), pressing the base plate (3) on the reaction box (2), adhering the adhesive layer (4) on the base plate (3), and simultaneously pressing the fire extinguishing sheet body (1) and the side of the reaction box (2) away from the base plate (3) into a molding; Quality inspection: Carry out quality inspection on the prepared fire extinguishing tablets, including fire extinguishing performance test.

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