BLG-1-based electric ignition element and preparation method and application thereof

Abstract

The invention relates to a BLG-1-based electric ignition element and a preparation method thereof. Wherein the primary explosive is bromic acid 4, 4 '-diazo-1, 2, 4-triazole copper (BLG-1); the binder is one or more of polyvinyl alcohol, nitrocotton and phenolic resin; the ignition powder is one or more of Zr / KClO4, B / KNO3 and Al / KClO4; the ignition component is one of a bridge wire, a bridge belt and a semiconductor bridge. The ignition powder and the binder are mixed in proportion and coated on the surface of an ignition component, and after drying, the mixture of the ignition powder and the binder is dipped to prepare the ignition head. The electric ignition element has high safety, can continuously release bright flames and generate hot solid residues, and has high ignition capacity.

Description

Technical Field

[0001] The present invention relates to the technical fields of solid rocket engines, fire-fighting drone engines, aerosol fire extinguishing devices, and automobile airbags, and in particular to a BLG-1-based electric ignition element, a preparation method, and applications thereof. Background Art

[0002] Electric ignition elements are widely used in ignition devices to ignite the main charge, thereby achieving the function of stable and continuous output of flame, heat and high-temperature hot solid particles. They act on the next-level devices such as rocket engines, fire-fighting drone engines, aerosol fire extinguishing devices and automobile airbags.

[0003] Electric ignition components are mainly composed of explosives and ignition powders. The explosives are agents with high flame sensitivity. Lead styphnate has high flame sensitivity and needle sensitivity and is usually used as the explosive for electric ignition components. However, the heavy metal lead it contains can cause great harm to the human body and cause serious pollution to the environment. Therefore, research on environmentally friendly and sensitive energetic materials for use as explosives has long been a goal pursued by people. Summary of the Invention

[0004] The technical problem solved by the present invention is: to overcome the shortcomings of the existing technology, to propose a BLG-1-based electric ignition element and a preparation method thereof, such electric ignition element has a shorter ignition delay time; has a longer output flame, and the combustion products have more high-temperature hot solid particles, which can improve the ability to ignite the lower-level ignition powder. In addition, the preparation method of the invention is simple and the operation process is safe.

[0005] The technical solution of the present invention is:

[0006] A BLG-1 based electric ignition element, comprising an explosive, a binder, an ignition powder and an ignition component;

[0007] Among them, the explosive is 4,4'-diazo-1,2,4-triazole copper bromate (BLG-1);

[0008] The binder is at least one of polyvinyl alcohol, nitrocellulose, and phenolic resin;

[0009] The raw material of the ignition powder is at least one of Zr / KClO4, B / KNO3, and Al / KClO4;

[0010] The ignition component is a bridge wire such as a nickel-chromium bridge wire, a bridge strip, or a semiconductor bridge.

[0011] A method for preparing a BLG-1-based electric ignition element, the method comprising the steps of:

[0012] The first step is to prepare a binder solution by mixing the binder with a solvent to obtain a binder solution;

[0013] In the second step, the priming agent is mixed with the binder solution obtained in the first step to obtain pyrotechnic powder;

[0014] The third step is to apply the pyrotechnic powder obtained in the second step to the surface of the bridge area of ​​the pyrotechnic component and dry it;

[0015] The fourth step is to mix the raw materials of the ignition powder and the binder to obtain an ignition powder slurry;

[0016] In the fifth step, the ignition component with the bridge area surface coated with ignition powder obtained in the third step is immersed in the ignition powder slurry obtained in the fourth step, so that the ignition component is covered with a layer of ignition powder slurry, and is dried to obtain a BLG-1 based electric ignition element.

[0017] The invention discloses an application of a BLG-1 based electric ignition element, wherein the obtained BLG-1 based electric ignition element is placed in an ignition device to ignite a main charge.

[0018] In the first step, the solvent is at least one of deionized water, ethanol, and ethyl acetate;

[0019] In the first step, the mass concentration of the binder solution is 2%-10%;

[0020] In the first step, when the binder and the solvent are mixed:

[0021] When the solvent is deionized water and the binder is polyvinyl alcohol, the mixing temperature is 100-110°C;

[0022] When the solvent is ethyl acetate and the binder is nitrocellulose, the mixing temperature is 30-35°C;

[0023] When the solvent is ethanol and the binder is phenolic resin, the mixing temperature is room temperature;

[0024] In the second step, the mass ratio of the binder solution to the explosive is 0.8-1.5:1;

[0025] In the second step, the explosive and the binder solution are stirred while being mixed, and the stirring time is 10-15 minutes;

[0026] In the third step, the drying time is 18-24 hours;

[0027] In the fifth step, the drying time is 18-24 hours.

[0028] The present invention has the following beneficial effects:

[0029] (1) The electric ignition element of the present invention has a shorter ignition delay time; since the electric ignition powder contains metal, it has a longer output flame, and the combustion product has a large number of high-temperature hot solid particles, which can reliably ignite the lower-level charge. It is a product with broad application prospects in the fields of rocket engines, fire-fighting drone engines, aerosol fire extinguishing devices, and automobile airbags.

[0030] (2) The raw materials for the preparation method of the BLG-1-based electric ignition element of the present invention are easily available, the preparation method of the invention is simple, and the operation process is highly safe, which is conducive to industrial production.

[0031] The present invention relates to a BLG-1-based electric ignition element and its preparation method. The explosive is 4,4'-diazo-1,2,4-triazole copper bromate (BLG-1); the binder is one or more of polyvinyl alcohol, nitrocellulose, and phenolic resin; the ignition powder is one or more of Zr / KClO4, B / KNO3, and Al / KClO4; and the ignition component is one of a bridge wire, a bridge ribbon, and a semiconductor bridge. The explosive and binder are mixed in proportion and coated on the surface of the ignition component. After drying, the mixture of the ignition powder and binder is dipped into the ignition head to form an ignition head. This type of electric ignition element has high safety, can continuously release bright flames and produce glowing solid residues, and has high ignition performance. Using BLG-1 as an initiating explosive gives the electro-igniting element a short ignition delay, enabling reliable ignition of the ignition charge. By varying the type and concentration of the binder, the sensitivity and ignition delay of the electro-igniting element can be adjusted, significantly regulating its combustion performance. By varying the type of ignition charge, the output performance of the electro-igniting element can be varied. In summary, electro-igniting elements using BLG-1 as an initiating explosive have broad application prospects in solid rocket engines, firefighting drone engines, aerosol fire extinguishing systems, and automotive airbags. Furthermore, the preparation method for electro-igniting elements is simple and the process is highly operational. BLG-1-based electro-igniting elements exhibit excellent ignition and output performance, and have broad application prospects in such areas as rocket engines, firefighting drone engines, aerosol fire extinguishing systems, and automotive airbags. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Graph showing the ignition process of a BLG-1 based electric ignition element with a phenolic resin binder;

[0033] Figure 2 Diagram of the ignition process of BLG-1 based electric ignition element with polyvinyl alcohol binder;

[0034] Figure 3 Diagram of the ignition process of a BLG-1 based electric ignition element with nitrocellulose binder;

[0035] Figure 4This is a schematic structural diagram of the ignition element obtained in Example 1. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to specific embodiments without limiting the present invention.

[0037] Example 1

[0038] A method for preparing a BLG-1-based electric ignition element with a phenolic resin binder, the method comprising the following steps:

[0039] In the first step, 0.6 g of phenolic resin was placed in beaker A, and then 19.4 g of ethanol was added and stirred for 10 minutes to obtain a phenolic resin solution;

[0040] In the second step, 200 mg of BLG-1 explosive was poured into another beaker B, and then 240 mg of the phenolic resin solution obtained in the first step was taken out and placed into the beaker B, and the mixture was stirred for 10 minutes to obtain the pyrotechnic powder;

[0041] The third step is to coat the pyrotechnic powder obtained in the second step on the bridge area surface of the semiconductor bridge and dry it in the air for 24 hours.

[0042] In the fourth step, 3 g of Zr / KCLO3 (the mass ratio of Zr to KCLO3 is 1:1) was mixed with 1.3 g of the phenolic resin solution obtained in the first step and stirred for 10 minutes to obtain an ignition powder slurry;

[0043] The fifth step is to immerse the semiconductor bridge with the bridge area surface coated with ignition powder obtained in the third step into the ignition powder slurry obtained in the fourth step, so that the semiconductor bridge is coated with a layer of ignition powder slurry, and then dry it for 24 hours to obtain a BLG-1 based electric ignition element. Figure 4 As shown;

[0044] The invention discloses an application of a BLG-1 based electric ignition element, wherein the obtained BLG-1 based electric ignition element is placed in an ignition device to ignite a main charge.

[0045] The ignition performance of the obtained BLG-1 based electric ignition element was tested. The ignition test process is shown in the figure below. Figure 1 As shown, the longer the flame duration of the electric ignition element, the better the performance. A BLG-1-based electric ignition element was mounted on a rack. Power supply input and output clamps were attached to the ends of the wires at each end of the element. The power supply input current and voltage were set to 5A and 5V, respectively. Experiments were conducted and the ignition process was recorded with high-speed photography. The experiments showed that the electric ignition element had an ignition delay time of 10ms and a flame duration of 253ms, demonstrating its excellent application potential.

[0046] Example 2

[0047] A method for preparing a BLG-1-based electric ignition element with a polyvinyl alcohol binder, the method comprising the following steps:

[0048] In the first step, 0.8 g of polyvinyl alcohol was placed in beaker A, and then 19.2 g of deionized water was added, and the mixture was stirred at 110° C. until the polyvinyl alcohol was completely dissolved to obtain a polyvinyl alcohol solution.

[0049] In the second step, 200 mg of BLG-1 explosive was poured into another beaker B, and then 240 mg of the polyvinyl alcohol solution obtained in the first step was taken out and placed into the beaker B, and the mixture was stirred for 10 minutes to obtain the pyrotechnic powder;

[0050] The third step is to coat the pyrotechnic powder obtained in the second step on the bridge area surface of the semiconductor bridge and dry it in the air for 24 hours.

[0051] In the fourth step, 0.6 g of phenolic resin was placed in beaker C, and then 19.4 g of ethanol was added and stirred for 10 minutes to obtain a phenolic resin solution;

[0052] In the fifth step, 3 g of Zr / KCLO3 (the mass ratio of Zr to KCLO3 is 1:1) is mixed with 1.3 g of the phenolic resin solution obtained in the fourth step and stirred for 10 minutes to obtain an ignition powder slurry;

[0053] In the sixth step, the semiconductor bridge obtained in the third step, with the bridge area surface coated with ignition powder, is immersed in the ignition powder slurry obtained in the fourth step, so that the semiconductor bridge is covered with a layer of ignition powder slurry, and is dried for 24 hours to obtain a BLG-1 based electric ignition element.

[0054] The invention discloses an application of a BLG-1 based electric ignition element, wherein the obtained BLG-1 based electric ignition element is placed in an ignition device to ignite a main charge.

[0055] The obtained BLG-1 based electric ignition element was subjected to ignition test. The ignition test process is shown in the figure below. Figure 2 As shown in the figure, the longer the flame duration of the electric ignition element, the better the performance. A BLG-1-based electric ignition element was mounted on a rack. Power supply input and output clamps were attached to the ends of the wires at each end of the element. The power supply input current and voltage were set to 5A and 5V, respectively. Experiments were conducted, and the ignition process was recorded with high-speed photography. The experiments showed that the electric ignition element had an ignition delay time of 5ms and a flame duration of 244ms, demonstrating its excellent application potential.

[0056] Example 3

[0057] A method for preparing an electric ignition element based on a nitrocellulose binder BLG-1, the method comprising the following steps:

[0058] In the first step, 0.8 g of nitrocellulose was placed in beaker A, and then 19.2 g of ethyl acetate was added and stirred at 35°C until the nitrocellulose was completely dissolved to obtain a nitrocellulose solution;

[0059] In the second step, 200 mg of BLG-1 explosive was poured into another beaker B, and then 240 mg of the nitrocellulose solution obtained in the first step was taken out and placed into the beaker B, and the mixture was stirred for 10 minutes to obtain the pyrotechnic powder;

[0060] The third step is to coat the pyrotechnic powder obtained in the second step on the bridge area surface of the semiconductor bridge and dry it in the air for 24 hours.

[0061] In the fourth step, 0.6 g of phenolic resin was placed in beaker C, and then 19.4 g of ethanol was added and stirred for 10 minutes to obtain a phenolic resin solution;

[0062] In the fifth step, 3 g of Zr / KCLO3 (the mass ratio of Zr to KCLO3 is 1:1) is mixed with 1.3 g of the phenolic resin solution obtained in the fourth step and stirred for 10 minutes to obtain an ignition powder slurry;

[0063] In the sixth step, the semiconductor bridge obtained in the third step, with the bridge area surface coated with ignition powder, is immersed in the ignition powder slurry obtained in the fourth step, so that the semiconductor bridge is covered with a layer of ignition powder slurry, and is dried for 24 hours to obtain a BLG-1 based electric ignition element.

[0064] The invention discloses an application of a BLG-1 based electric ignition element, wherein the obtained BLG-1 based electric ignition element is placed in an ignition device to ignite a main charge.

[0065] The obtained BLG-1 based electric ignition element was subjected to ignition test. The ignition test process is shown in the figure below. Figure 3 As shown in the figure, the longer the flame duration of the electric ignition element, the better the performance. A BLG-1-based electric ignition element was mounted on a rack. Power supply input and output clamps were attached to the ends of the wires at each end of the element. The power supply input current and voltage were set to 5A and 5V, respectively. Experiments were conducted, and the ignition process was recorded with high-speed photography. The experiments showed that the electric ignition element had an ignition delay time of 5ms and a flame duration of 207ms, demonstrating its excellent application potential.

[0066] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A BLG-1 based electric ignition element, characterized in that: The BLG-1 based electric ignition element comprises explosive, binder, ignition powder and ignition parts; Among them, the explosive is 4,4'-diazo-1,2,4-triazole copper bromate.

2. A BLG-1 based electric ignition element according to claim 1, characterized in that: The binder is at least one of polyvinyl alcohol, nitrocellulose, and phenolic resin; The raw material of the ignition powder is at least one of Zr / KClO4, B / KNO3, and Al / KClO4; The ignition component is one of a bridge wire, a bridge strip, and a semiconductor bridge.

3. A BLG-1 based electric ignition element according to claim 1, characterized in that: The bridge wire is nickel-chromium bridge wire.

4. A method for preparing a BLG-1 based electric ignition element, characterized in that The steps of the method include: In the first step, the binder and the solvent are mixed to obtain a binder solution; In the second step, the priming agent is mixed with the binder solution obtained in the first step to obtain pyrotechnic powder; The third step is to apply the pyrotechnic powder obtained in the second step to the surface of the bridge area of ​​the pyrotechnic component and dry it; The fourth step is to mix the raw materials of the ignition powder and the binder to obtain an ignition powder slurry; In the fifth step, the ignition component with the bridge area surface coated with ignition powder obtained in the third step is immersed in the ignition powder slurry obtained in the fourth step, so that the ignition component is covered with a layer of ignition powder slurry, and is dried to obtain a BLG-1 based electric ignition element.

5. The method for preparing a BLG-1 based electric ignition element according to claim 4, characterized in that: In the first step, the solvent is at least one of deionized water, ethanol, and ethyl acetate; In the first step, the mass concentration of the binder solution is 2%-10%.

6. The method for preparing a BLG-1 based electric ignition element according to claim 4, characterized in that: In the first step, when the binder and the solvent are mixed: When the solvent is deionized water and the binder is polyvinyl alcohol, the mixing temperature is 100-110°C; When the solvent is ethyl acetate and the binder is nitrocellulose, the mixing temperature is 30-35°C; When the solvent is ethanol and the binder is phenolic resin, the mixing temperature is room temperature.

7. The method for preparing a BLG-1 based electric ignition element according to claim 4, characterized in that: In the second step, the mass ratio of the binder solution to the explosive is 0.8-1.5:1; In the second step, the explosive and the binder solution are stirred while being mixed, and the stirring time is 10-15 minutes.

8. The method for preparing a BLG-1 based electric ignition element according to claim 4, characterized in that: In the third step, the drying time is 18-24 hours.

9. The method for preparing a BLG-1 based electric ignition element according to claim 4, characterized in that: In the fifth step, the drying time is 18-24 hours.

10. An application of a BLG-1 based electric ignition element, characterized in that: The obtained BLG-1 based electric ignition element was placed in an ignition device to ignite the main charge.

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