An electrically activated chlorate oxygen candle column

Abstract

The present invention relates to an electrically started chlorate oxygen candle powder column, belonging to the technical field of oxygen generators. The invention comprises an oxygen-generating powder block, an ignition powder column, an ignition tool, and inorganic cotton. The top of the oxygen-generating powder block is provided with two or more grooves of a size matching the ignition powder column. The ignition powder column is located in the grooves. A mounting hole is provided in the ignition powder column. An ignition tool is placed in the mounting hole. The ignition tool is connected in series or in parallel via a wire, and the ignition tool and the ignition powder column are fixed by inorganic cotton. In the oxygen candle powder column of this structure, the heat generated by the ignition tool after power is applied can decompose the ignition powder column and generate heat, thereby igniting the oxygen-generating powder block and achieving smooth starting of the oxygen candle.

Description

Technical Field

[0001] The invention relates to an electrically started chlorate oxygen candle cartridge, belonging to the technical field of solid chemical oxygen generators. Background Art

[0002] Solid chemical oxygen generators utilize the thermal decomposition of chlorate to provide oxygen. The combustion of the oxygen-producing pellets is similar to that of a candle, hence their nickname, "oxygen candles." Chlorate oxygen candles offer advantages such as safety and reliability at normal pressure, freedom from environmental restrictions, maintenance-free operation, long lifespan, compact size, light weight, ease of operation, and transportability. Consequently, they are widely used as emergency oxygen supply devices in aerospace, skydiving, ships and submarines, high-altitude hypoxia environments, mine safety zones, and in toxic and hazardous environments such as the petroleum and chemical industries.

[0003] Chlorate oxygen candle starting is directly related to the safe combustion and reliable oxygen production of oxygen candles, making it a critical component. The starting charge, located at the head of the oxygen candle, is generally formulated with a fast burning rate and high energy. Foreign oxygen candle starting charges typically use gun starting charges or thermite. Gun starting charges contain nitrates, producing high levels of nitrogen oxides in the gas, which are harmful to the human body. Thermite has a high heat content and easily flowable residue, compromising the safety of the oxygen candle. Currently, there are two common starting methods: mechanical impact starting and electrical starting.

[0004] Percussion starting is a multi-stage ignition method. A spring drives a striker to trigger the percussion cap. The resulting flame or heat ignites the pilot charge, which in turn ignites the pyrotechnic charge, and finally the oxygen candle charge. Percussion caps are pyrotechnic devices, which are expensive and require specific storage, handling, and transportation requirements. This starting method also has a complex mechanical structure and is time-consuming to assemble. The striker can also easily become dislodged, resulting in ignition failure.

[0005] Electric starting is also a multi-stage starting method. When a certain current is applied to the ignition head, the heat generated by it ignites the ignition charge. The high heat generated by the combustion of the ignition charge then ignites the ignition aid, and finally the oxygen-generating charge. In electric starting, the ignition device is usually placed directly on the oxygen-generating charge, and then a powder-particle ignition charge is placed around the ignition device. This starting method requires the powder-particle ignition charge to provide a large amount of heat to ensure a successful start of the oxygen-generating charge. Summary of the Invention

[0006] In view of this, an object of the present invention is to provide an electrically started chlorate oxygen candle cartridge.

[0007] To achieve the above object, the technical solution of the present invention is as follows:

[0008] The invention discloses an electrically started chlorate oxygen candle powder column, comprising an oxygen-generating powder block, an ignition powder column, an ignition device and inorganic cotton. The top of the oxygen-generating powder block is provided with two or more grooves whose sizes match the ignition powder column. The ignition powder column is located in the grooves. A mounting hole is provided in the ignition powder column. The ignition device is placed in the mounting hole. The ignition device is connected in series or in parallel through a wire. The ignition device and the ignition powder column are fixed by inorganic cotton.

[0009] Furthermore, the oxygen-generating powder block is a mixture of sodium chlorate, potassium perchlorate, barium peroxide, boron powder and a catalyst; the ignition powder column is a mixture of sodium chlorate, barium peroxide, boron powder, lithium permanganate and a catalyst.

[0010] Furthermore, based on the total mass of the oxygen-generating powder block as 100%, the mass fraction of sodium chlorate is 75% to 90%, the mass fraction of potassium perchlorate is 4 to 15%, the mass fraction of barium peroxide is 0.5 to 2%, the mass fraction of boron powder is 0.5 to 1.5%, and the mass fraction of the catalyst is 5 to 15%; based on the total mass of the ignition charge column as 100%, the mass fraction of sodium chlorate is 75 to 80%, the mass fraction of barium peroxide is 0.5 to 2%, the mass fraction of boron powder is 1 to 3%, the mass fraction of lithium permanganate is 5 to 15%, and the mass fraction of the catalyst is 5 to 10%; the catalyst is a substance obtained by calcining cobalt carbonate, cobalt oxalate or cobalt hydroxide at 180°C to 380°C for 8h to 48h.

[0011] Furthermore, the oxygen-generating powder block and the ignition-transmitting powder column are integrally pressed and formed.

[0012] Furthermore, during the integral press molding, the pyrotechnic powder column tooling is first placed in the mold of the oxygen-producing powder block according to the position of the pyrotechnic powder column in the oxygen candle powder column. A protrusion matching the size of the mounting hole is provided at the bottom of the mold. Then the pyrotechnic powder column to be formed is placed in the tooling, and then the oxygen-producing powder block to be formed is placed in the mold. When the added height of the oxygen-producing powder block is greater than or equal to the height of the pyrotechnic powder column, the pyrotechnic powder column tooling is taken out, and the oxygen-producing powder block is continued to be added to the required height, and finally pressed into shape.

[0013] Furthermore, the inorganic wool is one or more of glass wool, rock wool, aluminum silicate wool and slag wool.

[0014] Furthermore, the oxygen-generating powder block is a rectangular parallelepiped structure, and the ignition-transmitting powder column is a cylindrical structure.

[0015] Furthermore, the ratio of the size of the oxygen-generating powder block, the diameter of the ignition powder column, the height of the ignition powder column, the diameter of the mounting hole, and the height of the mounting hole is 100-250×100-250×50-300:35-80:30-60:5-25:20-50.

[0016] Beneficial effects

[0017] The present invention provides an electrically started chlorate oxygen candle powder column. A groove is formed on an oxygen-generating powder block, and an ignition powder column is arranged in the groove, so that the ignition powder column and the oxygen-generating powder block are combined together. An ignition device is fixed in the ignition powder column by inorganic cotton. When the ignition device is energized, the heat generated can decompose the ignition powder column and generate heat, thereby igniting the oxygen-generating powder block, thereby achieving smooth starting of the oxygen candle.

[0018] The present invention further controls the components and contents of the ignition powder column and the oxygen-producing powder block, and adopts a catalyst prepared by a specific method. A small amount of non-metallic fuel in the ignition powder column can start the oxygen-producing powder block containing a trace amount of non-metallic fuel, thereby achieving the start-up and complete combustion of the oxygen candle powder column. At the same time, it avoids the side reactions that may be caused by high temperature and the introduction of carbon impurities by a large amount of metal fuel, thereby reducing the CO content in the initial stage of the oxygen candle startup. It effectively improves the oxygen production performance of the oxygen candle, reduces the use of gas purification materials, reduces production costs, and can reduce the overall weight of the finished oxygen candle at the same time, thereby increasing the oxygen production per unit mass. In addition, the reducibility of the non-metallic fuel boron powder is weaker than that of the metal fuel iron powder or magnesium powder. The use of boron powder can effectively increase the service life of the oxygen candle.

[0019] The present invention further controls the integral molding of the ignition powder column and the oxygen-generating powder block, so that the ignition powder column and the oxygen-generating powder block are closely matched, and the two different materials are fused to a certain extent at the intersection, which promotes heat transfer and continuation of the combustion surface.

[0020] The present invention further regulates the structural dimensions of the ignition powder column, the ignition device and the oxygen-generating powder block, thereby greatly improving the success rate of starting the oxygen candle and having strong operability and practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the oxygen candle powder column of the present invention.

[0022] Among them, 1-oxygen-producing powder block, 2-fire-transmitting powder column, 3-ignition device, 4-inorganic cotton. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to specific embodiments.

[0024] like Figure 1 As shown, an electrically started chlorate oxygen candle powder column includes an oxygen-generating powder block 1, an ignition powder column 2, an ignition device 3 and inorganic cotton 4. The top of the oxygen-generating powder block 1 is provided with two or more grooves of a size matching the ignition powder column 2. The ignition powder column 2 is located in the grooves. A mounting hole is provided in the ignition powder column 2. The ignition device 3 is placed in the mounting hole. The ignition device 3 is connected in series or in parallel through a wire. The ignition device 3 and the ignition powder column 2 are fixed by the inorganic cotton 4.

[0025] The oxygen-generating powder block 1 is a mixture of sodium chlorate, potassium perchlorate, barium peroxide, boron powder and a catalyst; the ignition powder column 2 is a mixture of sodium chlorate, barium peroxide, boron powder, lithium permanganate and a catalyst.

[0026] Based on the total mass of the oxygen-generating charge 1 being 100%, the mass fraction of sodium chlorate is 75% to 90%, the mass fraction of potassium perchlorate is 4% to 15%, the mass fraction of barium peroxide is 0.5% to 2%, the mass fraction of boron powder is 0.5% to 1.5%, and the mass fraction of the catalyst is 5% to 15%. Based on the total mass of the ignition charge 2 being 100%, the mass fraction of sodium chlorate is 75% to 80%, the mass fraction of barium peroxide is 0.5% to 2%, the mass fraction of boron powder is 1% to 3%, the mass fraction of lithium permanganate is 5% to 15%, and the mass fraction of the catalyst is 5% to 10%. The catalyst is a substance obtained by calcining cobalt carbonate, cobalt oxalate or cobalt hydroxide at 180° C. to 380° C. for 8 h to 48 h.

[0027] The oxygen-generating powder block 1 and the ignition-transmitting powder column 2 are integrally pressed and formed.

[0028] During the integral pressing and molding, the ignition powder column tooling is first placed in the mold of the oxygen-producing powder block 1 according to the position of the ignition powder column 2 in the oxygen candle powder column. The bottom of the mold is provided with a protrusion that matches the size of the mounting hole. Then the ignition powder column 2 to be formed is placed in the tooling, and then the oxygen-producing powder block 1 to be formed is placed in the mold. When the added height of the oxygen-producing powder block is greater than or equal to the height of the ignition powder column 2, the ignition powder column tooling is taken out, and the oxygen-producing powder blocks are continued to be added to the required height, and finally pressed into shape. The integral pressing and molding method allows the ignition powder column 2 to fit tightly with the oxygen-producing powder block 1, and the two different materials have a certain degree of fusion at the intersection, which can promote heat transfer and the continuation of the combustion surface.

[0029] The inorganic wool 4 can be one or more of glass wool, rock wool, aluminum silicate wool, and slag wool. The inorganic wool 4 strengthens the connection between the igniter 3 and the pyrotechnic charge column 2, preventing the igniter 3 from falling from the pyrotechnic charge column 2 during transportation or collisions, which could cause the oxygen candle to fail to start. It also helps to concentrate the generated heat. Furthermore, the inorganic wool 4 does not burn at high temperatures and does not produce harmful gases.

[0030] The oxygen generating charge block 1 is a rectangular parallelepiped structure, and the ignition charge column 2 is a cylindrical structure. The number of ignition charge columns is proportional to the combustion rate of the oxygen generating charge block, and the number of ignition charge columns can be determined according to the combustion rate requirement of the oxygen generating charge block.

[0031] The ratio of the size of the oxygen generating powder block 1, the diameter of the ignition powder column 2, the height of the ignition powder column 2, the diameter of the mounting hole, and the height of the mounting hole is 100-250×100-250×50-300:35-80:30-60:5-25:20-50.

[0032] Example 1

[0033] In this embodiment, the dimensions of the oxygen-generating charge block 1 are 160 mm x 160 mm x 280 mm; the ignition charge column 2 has a diameter of 56 mm and a height of 58 mm; the mounting hole has a diameter of 22 mm and a height of 46 mm. Three ignition charge columns are evenly distributed on the oxygen-generating charge block 1.

[0034] The formula of the oxygen-generating charge 1 is 82.5% sodium chlorate, 6% potassium perchlorate, 1% barium peroxide, 0.5% boron powder, and 10% catalyst. The formula of the ignition charge 2 is 80% sodium chlorate, 1% barium peroxide, 1% boron powder, 8% lithium permanganate, and 10% catalyst. The catalyst is cobalt hydroxide calcined at 260°C for 24 hours.

[0035] The three igniters 3 on the mounting holes are connected in series.

[0036] The inorganic cotton 4 is aluminum silicate cotton.

[0037] The ignition device 3 in the oxygen candle powder column of this embodiment was successfully started after being powered on. At the same time, the CO concentration generated during the combustion of the oxygen candle powder column was detected using an infrared / oxygen analysis system (SIEMENS, ULTRAMAT / OXYMAT 6E). The CO peak value results are shown in Table 1.

[0038] Example 2

[0039] In this embodiment, the dimensions of the oxygen-generating charge block 1 are 160 mm x 160 mm x 280 mm; the ignition charge column 2 has a diameter of 56 mm and a height of 58 mm; the mounting hole has a diameter of 22 mm and a height of 46 mm. Three ignition charge columns are evenly distributed on the oxygen-generating charge block 1.

[0040] The formula of the oxygen-generating charge 1 is 82.5% sodium chlorate, 6% potassium perchlorate, 1% barium peroxide, 0.5% boron powder, and 10% catalyst. The formula of the ignition charge 2 is 79% sodium chlorate, 1% barium peroxide, 2% boron powder, 8% lithium permanganate, and 10% catalyst. The catalyst is cobalt hydroxide calcined at 260°C for 24 hours.

[0041] The three igniters 3 on the mounting holes are connected in series.

[0042] The inorganic cotton 4 is aluminum silicate cotton.

[0043] The ignition device 3 in the oxygen candle powder column of this embodiment was successfully started after being powered on. At the same time, the CO concentration generated during the combustion of the oxygen candle powder column was detected using an infrared / oxygen analysis system (SIEMENS, ULTRAMAT / OXYMAT 6E). The CO peak value results are shown in Table 1.

[0044] Example 3

[0045] In this embodiment, the dimensions of the oxygen-generating charge block 1 are 160 mm x 160 mm x 280 mm; the ignition charge column 2 has a diameter of 56 mm and a height of 58 mm; the mounting hole has a diameter of 22 mm and a height of 46 mm. Three ignition charge columns are evenly distributed on the oxygen-generating charge block 1.

[0046] The formula of the oxygen-generating charge 1 is 82.5% sodium chlorate, 6% potassium perchlorate, 1% barium peroxide, 0.5% boron powder, and 10% catalyst. The formula of the ignition charge 2 is 78% sodium chlorate, 1% barium peroxide, 3% boron powder, 8% lithium permanganate, and 10% catalyst. The catalyst is cobalt hydroxide calcined at 260°C for 24 hours.

[0047] The three igniters 3 on the mounting holes are connected in series.

[0048] The inorganic cotton 4 is aluminum silicate cotton.

[0049] The ignition device 3 in the oxygen candle powder column of this embodiment was successfully started after being powered on. At the same time, the CO concentration generated during the combustion of the oxygen candle powder column was detected using an infrared / oxygen analysis system (SIEMENS, ULTRAMAT / OXYMAT 6E). The CO peak value results are shown in Table 1.

[0050] Comparative Example 1

[0051] In this example, an igniter is placed directly on an oxygen-generating powder. The powder's composition is 82.5% sodium chlorate, 6% potassium perchlorate, 1% barium peroxide, 0.5% boron powder, and 10% catalyst, which is cobalt hydroxide calcined at 260°C for 24 hours. Powdered ignition powder is placed around the igniter to form an oxygen candle.

[0052] The ignition device 3 in the oxygen candle powder column of this embodiment was successfully started after being powered on. At the same time, the CO concentration generated during the combustion of the oxygen candle powder column was detected using an infrared / oxygen analysis system (SIEMENS, ULTRAMAT / OXYMAT 6E). The CO peak value results are shown in Table 1.

[0053] Table 1

[0054] serial number CO peak value (ppm) Example 1 22 Example 2 48 Example 3 67 Comparative Example 1 512

[0055] In summary, the invention includes but is not limited to the above embodiments. Any equivalent replacement or partial improvement made under the spirit and principle of the present invention shall be deemed to be within the scope of protection of the present invention.

Claims

1. An electrically activated chlorate oxygen candle cartridge, characterized in that: The invention comprises an oxygen-generating powder block (1), an ignition powder column (2), an igniter (3) and inorganic cotton (4); the top of the oxygen-generating powder block (1) is provided with two or more grooves of a size matching the ignition powder column (2); the ignition powder column (2) is located in the groove; the top of the ignition powder column (2) is provided with a mounting hole; the igniter (3) is placed in the mounting hole; the igniter (3) is connected in series or in parallel through a wire; the igniter (3) and the ignition powder column (2) are fixed by the inorganic cotton (4); The oxygen-generating powder block (1) is a mixture of sodium chlorate, potassium perchlorate, barium peroxide, boron powder and a catalyst; the ignition powder column (2) is a mixture of sodium chlorate, barium peroxide, boron powder, lithium permanganate and a catalyst; Taking the total mass of the oxygen-generating powder block (1) as 100%, the mass fraction of sodium chlorate is 75% to 90%, the mass fraction of potassium perchlorate is 4% to 15%, the mass fraction of barium peroxide is 0.5% to 2%, the mass fraction of boron powder is 0.5% to 1.5%, and the mass fraction of the catalyst is 5% to 15%. Taking the total mass of the ignition charge column (2) as 100%, the mass fraction of sodium chlorate is 75% to 80%, the mass fraction of barium peroxide is 0.5% to 2%, the mass fraction of boron powder is 1% to 3%, the mass fraction of lithium permanganate is 5% to 15%, and the mass fraction of the catalyst is 5% to 10%. The catalyst is a substance obtained by calcining cobalt carbonate, cobalt oxalate or cobalt hydroxide at 180° C. to 240° C. for 8 h to 24 h.

2. The electrically activated chlorate oxygen candle cartridge according to claim 1, wherein: The oxygen-generating powder block (1) and the ignition-transmitting powder column (2) are integrally pressed and formed.

3. An electrically activated chlorate oxygen candle cartridge as claimed in claim 2, characterized in that: During the integral pressing and molding, the pyrotechnic powder column tooling is first placed in the mold of the oxygen-generating powder block (1) according to the position of the pyrotechnic powder column (2) in the oxygen candle powder column. A protrusion matching the size of the mounting hole is provided at the bottom of the mold. The pyrotechnic powder column (2) to be formed is then placed in the tooling, and then the oxygen-generating powder block (1) to be formed is placed in the mold. When the added height of the oxygen-generating powder block is greater than or equal to the height of the pyrotechnic powder column (2), the pyrotechnic powder column tooling is taken out, and the oxygen-generating powder blocks are continued to be added to the required height, and finally pressed and molded.

4. The electrically activated chlorate oxygen candle cartridge according to claim 1, wherein: The inorganic wool (4) is one or more of glass wool, rock wool, aluminum silicate wool and slag wool.

5. The electrically activated chlorate oxygen candle cartridge according to claim 1, wherein: The oxygen-generating powder block (1) is a rectangular parallelepiped structure, and the ignition-transmitting powder column (2) is a cylindrical structure.

6. The electrically activated chlorate oxygen candle cartridge according to claim 1, wherein: The ratio of the size of the oxygen-generating powder block (1), the diameter of the ignition powder column (2), the height of the ignition powder column (2), the diameter of the mounting hole, and the height of the mounting hole is 100-250×100-250×50-300:35-80:30-60:5-25:20-50.

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