阅读说明：本技术 一种螺旋空心铝纤维储氢复合炸药及其制备方法 (Spiral hollow aluminum fiber hydrogen storage composite explosive and preparation method thereof ) 是由 马宏昊 陈继平 沈兆武 王奕鑫 黄亮亮 于 2021-02-05 设计创作，主要内容包括：本发明公开了一种螺旋空心铝纤维储氢复合炸药及其制备方法,其特征在于,高能炸药中预置储存高压氢气的螺旋空心铝纤维,以提高炸药的爆轰性能。将外径1-10mm,壁厚0.2-1mm的空心铝纤维缠绕成螺旋状,螺旋空心铝纤维内径为5-200mm,壁厚1-10mm,层数为1-20层,最外层螺旋空心铝纤维内部填充高能炸药,螺旋空心铝纤维一端使用密封套密封,另一端连接单向阀,待起爆前通过单向阀向空心铝纤维内部填充1-20MPa高压氢气,即制得所述螺旋空心铝纤维储氢复合炸药。本发明所包含的螺旋空心铝纤维和其内部储存的高压氢气均是高能物质,高压氢气提升炸药峰值超压等参数10-30％,螺旋空心铝纤维提升炸药能量输出10-50％,螺旋空心铝纤维储氢复合炸药具有高爆压、高爆热和反应时间长等优点。(The invention discloses a spiral hollow aluminum fiber hydrogen storage composite explosive and a preparation method thereof, which are characterized in that spiral hollow aluminum fibers for storing high-pressure hydrogen are preset in a high-energy explosive so as to improve the detonation performance of the explosive. The spiral hollow aluminum fiber hydrogen storage composite explosive is prepared by winding hollow aluminum fibers with the outer diameter of 1-10mm and the wall thickness of 0.2-1mm into a spiral shape, wherein the inner diameter of each spiral hollow aluminum fiber is 5-200mm, the wall thickness is 1-10mm, the number of layers is 1-20, high-energy explosives are filled in the spiral hollow aluminum fibers at the outermost layer, one end of each spiral hollow aluminum fiber is sealed by a sealing sleeve, the other end of each spiral hollow aluminum fiber is connected with a one-way valve, and 1-20MPa high-pressure hydrogen is filled in the hollow aluminum fibers through the one-way valve before initiation. The spiral hollow aluminum fiber and the high-pressure hydrogen stored in the spiral hollow aluminum fiber are high-energy substances, the high-pressure hydrogen promotes the parameters of the explosive peak overpressure and the like by 10-30%, the spiral hollow aluminum fiber promotes the explosive energy output by 10-50%, and the spiral hollow aluminum fiber hydrogen storage composite explosive has the advantages of high detonation pressure, high detonation heat, long reaction time and the like.)

1. A spiral hollow aluminum fiber hydrogen storage composite explosive is characterized in that: comprises spiral hollow aluminum fiber (01), high-energy explosive (02), a sealing sleeve (03) and a one-way valve (04); high-energy explosive (02) is filled in the spiral hollow aluminum fiber (01) at the outermost layer, one end of the spiral hollow aluminum fiber (01) is sealed through a sealing sleeve (03), the other end of the spiral hollow aluminum fiber is connected with a one-way valve (04), and 1-20MPa hydrogen (05) can be filled in the spiral hollow aluminum fiber (01).

2. The spiral hollow aluminum fiber hydrogen storage composite explosive according to claim 1, characterized in that: the method comprises the steps of winding hollow aluminum fibers into spiral hollow aluminum fibers (01), wherein the number of layers of the spiral hollow aluminum fibers is 1-20, the outer diameter of the hollow aluminum fibers of the spiral hollow aluminum fibers (01) is 1-10mm, the corresponding wall thickness is 0.2-1mm, the inner diameter of the spiral hollow aluminum fibers (01) is 5-200mm, the wall thickness is the outer diameter of the hollow aluminum fibers, namely 1-10mm, and the height is 30-200 mm.

3. The spiral hollow aluminum fiber hydrogen storage composite explosive according to claim 1, characterized in that: the spiral hollow aluminum fiber composite explosive can control the mass ratio of the spiral hollow aluminum fibers to the high-energy explosive (02) by adjusting the diameter, the height and the number of layers of the spiral hollow aluminum fibers (01), and comprises the following components in percentage by mass: 40-90% of high-energy explosive and 10-60% of spiral hollow aluminum fiber.

4. The spiral hollow aluminum fiber hydrogen storage composite explosive according to claim 1, characterized in that: the high-energy explosive (02) is selected from high-energy explosives such as hexogen, octogen, TNT, Taian, TNT and the like;

the one-way valve (04) only allows hydrogen (05) to enter the hollow aluminum fiber so as to ensure the air tightness of the spiral hollow aluminum fiber after the hydrogen is filled;

and filling 1-20MPa hydrogen (05) into the spiral hollow aluminum fibers before detonation.

5. The spiral hollow aluminum fiber hydrogen storage composite explosive according to claim 1, characterized in that: the spiral hollow aluminum fiber for storing high-pressure hydrogen is preset in the high-energy explosive so as to improve the detonation performance of the explosive.

6. A preparation method of a spiral hollow aluminum fiber hydrogen storage composite explosive is characterized by comprising the following steps: the preparation method of the spiral hollow aluminum fiber hydrogen storage composite explosive comprises the following steps: winding hollow aluminum fibers into a spiral shape, closely attaching adjacent pipe walls, wherein the spiral hollow aluminum fibers are positioned inside or outside the high-energy explosive, and the number of the layers of the spiral hollow aluminum fibers is 1-20; one end of the spiral hollow aluminum fiber is sealed by a sealing sleeve, the other end of the spiral hollow aluminum fiber is connected with a one-way valve to ensure the sealing property after high-pressure hydrogen is filled inside the spiral hollow aluminum fiber, and 1-20MPa hydrogen is stored in the hollow aluminum fiber through the one-way valve before detonation, so that the spiral hollow aluminum fiber hydrogen storage composite explosive is obtained.

7. The preparation method of the spiral hollow aluminum fiber hydrogen storage composite explosive according to claim 6, characterized in that: the mass ratio of the spiral hollow aluminum fibers to the explosive is controlled by adjusting the diameter, the height and the number of layers of the spiral hollow aluminum fibers, and the mass percentages of the components are as follows: 40-90% of high-energy explosive and 10-60% of spiral hollow aluminum fiber.

8. The preparation method of the spiral hollow aluminum fiber hydrogen storage composite explosive according to claim 6, characterized in that: the hollow aluminum fiber has an outer diameter of 1-10mm and a wall thickness of 0.2-1mm, and has an inner diameter of 5-200mm, a wall thickness of 1-10mm and a height of 30-200mm after being wound into a spiral hollow aluminum fiber.

9. The preparation method of the spiral hollow aluminum fiber hydrogen storage composite explosive according to claim 6, characterized in that: the high-energy explosive is selected from high-energy explosives such as hexogen, TNT, Taian or octogen.

10. The preparation method of the spiral hollow aluminum fiber hydrogen storage composite explosive according to claim 6, characterized in that: the material of the spiral hollow aluminum fiber is industrial pure aluminum.

Technical Field

The invention belongs to the technical field of explosives and preparation thereof, and particularly relates to a spiral hollow aluminum fiber hydrogen storage composite explosive and a preparation method thereof.

Background

As a special energy source, the explosive has the characteristics of high energy density and high power and is widely applied to the fields of military and civil use. The conventional high-energy explosive has short action time, and the damage effect of the generated shock wave on a long-distance target is greatly low due to the rapid attenuation. In order to overcome the disadvantage of ideal explosives, high-energy powder such as aluminum, silicon, magnesium, boron and the like is usually added into a base explosive, wherein the aluminum has wide sources, no toxicity and excellent combustion characteristics, and is most widely applied to mixed explosives. Aluminum, which is a high-calorific-value energetic metal, reacts with detonation products of explosives or oxygen in the surrounding environment for the second time to release a large amount of energy, so that the detonation heat and the detonation temperature of the basic explosives are improved, and in addition, the time scale of the secondary reaction of aluminum powder is longer, so that the pressure reduction in the expansion process of the detonation products is slowed down, the energy release process of the explosives is changed, and the energy output capacity of the explosives is obviously improved.

The aluminum-containing explosive is prepared by uniformly mixing aluminum powder with a certain particle size with a high-energy explosive, wherein the content, the particle size, the shape and the like of the aluminum powder influence the detonation performance of the aluminum-containing explosive, the micron-sized or nano-sized aluminum powder can react with the detonation product of the explosive for the second time, the specific surface area of the aluminum powder is increased along with the reduction of the particle size of the aluminum powder, the energy output of the aluminum-containing explosive is improved more obviously, but Al exists along with the reduction of the particle size of the aluminum powder₂O₃And thus an optimum particle size range exists for different explosive types and experimental conditions.

Hydrogen energy has the advantages of high specific energy, clean green and wide sources, so the method is always a research hotspot in the field of energetic materials, and is pointed out in a paper of Detonation Characteristics of expression applications sensitive by Hydrogen-Storage Glass Microballoons according to Wangxin: the hydrogen is stored in the glass microspheres to serve as an energy-containing sensitizer of the emulsion explosive, and the hydrogen participates in the detonation reaction of the emulsion explosive, so that the peak overpressure of the emulsion explosive is improved, the attenuation of shock waves is slowed down, and the detonation performance of the emulsion explosive is obviously improved.

Aluminum-containing explosives have the characteristics of high detonation heat and long detonation action time, but the detonation parameters of the explosives, such as detonation pressure and detonation velocity, are reduced, and the contradiction needs to be solved urgently at present.

Disclosure of Invention

The invention discloses a spiral hollow aluminum fiber structure for storing high-pressure hydrogen in a high-energy explosive in advance, wherein the hydrogen and the hollow aluminum fiber are high-energy substances, and the detonation performance of the explosive can be obviously improved.

The technical scheme adopted by the invention is as follows: a spiral hollow aluminum fiber hydrogen storage composite explosive comprises spiral hollow aluminum fibers, a high-energy explosive, a sealing sleeve and a one-way valve; high-energy explosive is filled in the spiral hollow aluminum fiber at the outermost layer, one end of the spiral hollow aluminum fiber is sealed through a sealing sleeve, the other end of the spiral hollow aluminum fiber is connected with a one-way valve, and 1-20MPa hydrogen can be filled in the spiral hollow aluminum fiber.

The outer diameter of the hollow aluminum fiber of the spiral hollow aluminum fiber is 1-10mm, the corresponding wall thickness is 0.2-1mm, the inner diameter of the spiral hollow aluminum fiber is 5-200mm, the wall thickness is the outer diameter of the hollow aluminum fiber, namely 1-10mm, the number of layers is 1-20, and the height is 30-200 mm.

The spiral hollow aluminum fiber composite explosive can control the mass ratio of the spiral hollow aluminum fibers to the high-energy explosive by adjusting the diameter, the height and the number of layers of the spiral hollow aluminum fibers, and comprises the following components in percentage by mass: 40-90% of high-energy explosive and 10-60% of spiral hollow aluminum fiber.

The high-energy explosive is selected from high-energy explosives such as hexogen, octogen, TNT, Taian, TNT and the like;

the check valve only allows hydrogen to enter the hollow aluminum fiber so as to ensure the air tightness of the spiral hollow aluminum fiber after the hydrogen is filled;

filling 1-20MPa of hydrogen into the spiral hollow aluminum fibers before detonation;

the preparation method of the spiral hollow aluminum fiber hydrogen storage composite explosive comprises the following steps: the hollow aluminum fiber is wound into a spiral shape, the adjacent pipe walls are tightly attached, the spiral hollow aluminum fiber is positioned inside or outside the high-energy explosive, and the number of layers of the spiral hollow aluminum fiber is 1-20. One end of the spiral hollow aluminum fiber is sealed by a sealing sleeve, the other end of the spiral hollow aluminum fiber is connected with a one-way valve to ensure the sealing property after high-pressure hydrogen is filled inside the spiral hollow aluminum fiber, and 1-20MPa hydrogen is stored in the hollow aluminum fiber through the one-way valve before detonation, so that the spiral hollow aluminum fiber hydrogen storage composite explosive is obtained.

The spiral hollow aluminum fiber is of a thin-wall hollow structure, high-pressure hydrogen is stored in the spiral hollow aluminum fiber to improve detonation parameters of explosive, and the high-pressure hydrogen is released to promote the crushing of the aluminum fiber in the explosive detonation process.

The hollow aluminum fiber can ensure safe and continuous storage of the hydrogen inside after being wound into a spiral shape, simultaneously increases the contact area of the hollow aluminum fiber and the explosive, and can be used as a shell structure of the explosive when the spiral hollow aluminum fiber is positioned at the outermost layer.

The spiral hollow aluminum fiber structure positioned inside the explosive can be crushed into aluminum powder and aluminum sheets with smaller diameters, and hydrogen inside the spiral hollow aluminum fiber structure mainly participates in the detonation reaction of the explosive so as to improve the peak overpressure of the explosive; the spiral hollow aluminum fiber structure located at the outermost part of the explosive is mainly characterized in that hydrogen inside the spiral hollow aluminum fiber structure mainly reacts with oxygen in the surrounding environment, energy released by reaction compensates energy dissipation and temperature reduction in the expansion process of detonation products, and crushing, heating and burning of the spiral hollow aluminum fiber are promoted.

The aluminum in the spiral hollow aluminum fiber is continuous, the aluminum oxide only exists on the surface of the aluminum fiber, and the mass ratio of the aluminum is larger than that of the aluminum in the aluminum powder.

The spiral hollow aluminum fiber is stretched, sheared and broken into aluminum powder and aluminum sheets of dozens of microns to hundreds of microns under the action of high-temperature and high-pressure detonation waves, detonation products and internal high-pressure hydrogen, the reaction area of the aluminum fiber and the detonation products is increased, the melting point (2328K) of aluminum oxide is higher than the melting point (933K) of aluminum, the fresh aluminum surfaces exposed on the surfaces of the aluminum powder and the aluminum sheets react with the detonation products and cannot be hindered by the aluminum oxide, and the combustion reaction temperature of the aluminum is remarkably reduced.

Hydrogen released inside the spiral hollow aluminum fibers after the high-energy explosive is detonated participates in the detonation reaction of the explosive, so that the peak overpressure of the explosive is improved; the aluminum powder and the aluminum sheet formed by crushing the aluminum fiber are inert substances in the explosive detonation reaction process, the energy released by the reaction is absorbed, and the unreacted hydrogen continues to react with oxygen in the surrounding environment in the detonation product expansion process. The spiral hollow aluminum fiber hydrogen storage composite explosive has the advantages of high detonation pressure, high detonation heat, long reaction time and the like, and the peak overpressure and energy output of the base explosive are improved by adding the two energetic materials.

The spiral hollow aluminum fiber can form annular energy-gathered jet under the explosive detonation effect, and the penetration capability to surrounding media is improved.

Compared with the traditional aluminum-containing explosive, the hydrogen stored in the aluminum-containing explosive compensates the peak clipping effect of the spiral hollow aluminum fibers on the peak overpressure of the explosive, the detonation parameters such as the peak overpressure and impulse are improved by 10-30%, the spiral hollow aluminum fibers mainly react with detonation products after the explosive is detonated, the influence on the detonation effect of the explosive is small, the energy output of the explosive is improved by 10-50%, and the aluminum-containing explosive has a good application prospect in the civil and military fields.

Drawings

Reference will now be made in detail to the embodiments or the accompanying drawings that are required to be used in the description of the prior art, and it is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

FIG. 1 is a schematic structural diagram of the spiral hollow aluminum fiber hydrogen storage composite explosive in examples 1 and 2;

FIG. 2 is the surface results of the steel plate after explosion of the spiral hollow aluminum fiber hydrogen storage composite explosive in example 3;

FIG. 3 is the results of the steel plate surface after detonation of the control explosive in example 3;

FIG. 4 is a sectional view of the spiral hollow aluminum fiber hydrogen storage composite explosive of example 4.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention discloses a spiral hollow aluminum fiber structure for storing high-pressure hydrogen in a high-energy explosive in advance, wherein the hydrogen and hollow aluminum fibers are high-energy substances, and the spiral hollow aluminum fiber hydrogen storage composite explosive has the advantages of high detonation heat, high detonation temperature, long reaction time and the like, improves detonation parameters such as explosive peak value overpressure and the like, and has good application prospect in the civil and military fields.

Referring to fig. 1 and 4, the hollow aluminum fiber is wound into a spiral hollow aluminum fiber 01, the spiral hollow aluminum fiber can be multilayer, three layers of spiral hollow aluminum fibers are shown in fig. 4, high-energy explosive 02 is filled in the spiral hollow aluminum fiber, one end of the spiral hollow aluminum fiber is sealed by a sealing sleeve 03, the other end of the spiral hollow aluminum fiber is connected with a one-way valve 04, and 1-20MPa hydrogen 05 is filled in the spiral hollow aluminum fiber before initiation, so that the spiral hollow aluminum fiber hydrogen storage composite explosive is prepared.

The outer diameter of the hollow aluminum fiber is 1-10mm, the corresponding wall thickness is 0.2-1mm, the inner diameter of the spiral hollow aluminum fiber is 5-200mm, the wall thickness is the outer diameter of the hollow aluminum fiber, namely 1-10mm, and the height is 30-200 mm.

The spiral hollow aluminum fiber composite explosive can control the mass ratio of the spiral hollow aluminum fibers to the high-energy explosive 02 by adjusting the diameter, the height and the number of layers of the spiral hollow aluminum fibers 01, and comprises the following components in percentage by mass: 40-90% of high-energy explosive and 10-60% of spiral hollow aluminum fiber.

The high-energy explosive 02 is selected from high-energy explosives such as hexogen, octogen, TNT, Taian, TNT and the like.

The check valve 04 only allows hydrogen 05 to enter the hollow aluminum fiber to ensure the air tightness of the spiral hollow aluminum fiber after the hydrogen is filled.

Under the action of high-temperature and high-pressure detonation waves, detonation products and internal high-pressure hydrogen, the spiral hollow aluminum fiber 01 is stretched, sheared and broken into aluminum powder and aluminum sheets of tens of to hundreds of micrometers, and the aluminum powder and the aluminum sheets react with the detonation products of the high-energy explosive 02, so that the energy output of the explosive is improved. The hydrogen participates in the detonation reaction of the explosive, the peak overpressure of the explosive is improved, the residual unreacted hydrogen reacts with oxygen in the surrounding environment, the energy attenuation of the detonation product of the explosive is slowed down by the released energy, and the crushing and burning of the spiral hollow aluminum fiber are promoted.

The following describes a spiral hollow aluminum fiber hydrogen storage composite explosive by specific examples:

example 1

Hollow aluminum fiber material is industrial pure aluminium in this embodiment, external diameter 6mm, wall thickness 0.65mm, and ladder black explosive quality constitutes: 50% of hexogen, 50% of trinitrotoluene and 24.5g of cast trinitrotoluene.

The specific preparation method of the spiral hollow aluminum fiber hydrogen storage composite explosive comprises the following steps:

the hollow aluminum fiber is wound into a spiral shape, the adjacent pipe walls are tightly attached, the inner diameter of the spiral hollow aluminum fiber is 25mm, the wall thickness is the diameter (6mm) of the hollow aluminum fiber, the height is 35mm, the hollow aluminum fiber is arranged on the outermost layer, and 24.5g of ladder black explosive is cast in the hollow aluminum fiber. One end of the hollow aluminum fiber is sealed, the other end of the hollow aluminum fiber is connected with a one-way valve to ensure the sealing property after high-pressure hydrogen is filled inside, and 5MPa hydrogen is stored in the hollow aluminum fiber through the one-way valve before detonation, so that the spiral hollow aluminum fiber hydrogen storage composite explosive is obtained.

Control group: 24.5g of ladder black explosive, and the outside is not wound with spiral hollow aluminum fibers.

Two groups of experimental samples were subjected to underwater explosion experiments under the same experimental conditions. The diameter and the height of the underwater explosion tank are both 5m, the distance between the explosive package and the PCB pressure sensor is 3.0m under water, the distance between the sensor and the center of the explosive package is 1.0m, and an underwater explosion shock wave pressure curve is obtained through an oscilloscope in an experiment.

Table 1 shows the results of the underwater explosion experiment in example 1, and it can be seen from the experimental data that hydrogen participates in the detonation reaction of the emulsion explosive, so that the peak overpressure and impulse of the spiral hollow aluminum fiber hydrogen storage composite explosive are respectively increased by 4.13% and 23.51%, and the reaction of hydrogen and the spiral hollow aluminum fiber with the detonation product significantly increases the shock wave energy and the bubble energy by 29.17% and 35.96%, respectively.

TABLE 1

	Ladder black explosive	Spiral hollow aluminium fiber hydrogen storage composite explosive
			Peak overpressure/MPa	11.870	12.360
Impulse/(Pa s)	499.600	617.036
			Shock wave energy/MJ	0.0195	0.0252
Air bubble energy/MJ	0.0762	0.0710

Example 2

Hollow aluminum fiber material is industrial pure aluminium in this embodiment, external diameter 6mm, wall thickness 0.6mm, and ladder black explosive quality constitutes: 50% of hexogen, 50% of trinitrotoluene and 30g of trinitrotoluene.

The specific preparation method of the spiral hollow aluminum fiber hydrogen storage composite explosive comprises the following steps:

the hollow aluminum fiber is wound into a spiral shape, the adjacent pipe walls are tightly attached, the inner diameter of the spiral hollow aluminum fiber is 25mm, the wall thickness is the diameter (6mm) of the hollow aluminum fiber, the height is 35mm, 30g of ladder black explosive is cast in the spiral hollow aluminum fiber, and the casting height is basically consistent with the height of the spiral hollow aluminum fiber. One end of the hollow aluminum fiber is sealed, the other end of the hollow aluminum fiber is connected with a one-way valve to ensure the sealing property after high-pressure hydrogen is filled inside, and 5MPa hydrogen is stored in the hollow aluminum fiber through the one-way valve before detonation, so that the spiral hollow aluminum fiber hydrogen storage composite explosive is obtained.

Control group: 30g of ladder black explosive, and the outside of the ladder black explosive is not wound with spiral hollow aluminum fibers.

Two groups of experimental samples were subjected to an aerial explosion experiment. The diameter of the cylindrical aerial explosion tank is 2.4m, the length of the cylindrical aerial explosion tank is about 5m, the explosive package is arranged in the center of the aerial explosion tank, the ground clearance is 1.2m, the distance between the pressure sensor and the center of the explosive package is 1.0m, and an underwater explosion shock wave pressure curve is obtained through an oscilloscope in an experiment.

Table 2 shows experimental data of aerial explosion in example 2, hydrogen in the spiral hollow aluminum fibers participates in the detonation reaction of the explosive, so that peak overpressure and impulse of the spiral hollow aluminum fiber hydrogen storage composite explosive are respectively increased by 8.45% and 11.67% compared with pure ladder black explosive, and simultaneously, the hydrogen can react with oxygen in the ambient air to provide energy for crushing and heating up the spiral hollow aluminum fibers, promote the crushed aluminum powder and aluminum sheets to be more fully combusted, and release more energy.

TABLE 2

	Ladder black explosive	Spiral hollow aluminium fiber hydrogen storage composite explosive
			Peak overpressure/MPa	0.0686	0.0744
Impulse/(Pa s)	18.237	20.366

Example 3

Hollow aluminum fiber material is industrial pure aluminium in this embodiment, external diameter 6mm, wall thickness 0.6mm, explosive component mass ratio: 80% of hexogen, 20% of emulsion matrix and 30g of explosive.

The specific preparation method of the spiral hollow aluminum fiber hydrogen storage composite explosive comprises the following steps:

the hollow aluminum fiber is wound into a spiral shape, the adjacent pipe walls are tightly attached, the inner diameter of the spiral hollow aluminum fiber is 25mm, the wall thickness is the diameter (6mm) of the hollow aluminum fiber, the height is 30mm, 30g of explosive which is uniformly mixed is filled in the spiral hollow aluminum fiber, and the height of the explosive is basically consistent with that of the spiral hollow aluminum fiber. One end of the hollow aluminum fiber is sealed, the other end of the hollow aluminum fiber is connected with a one-way valve to ensure the sealing property after high-pressure hydrogen is filled inside, and 5MPa hydrogen is stored in the hollow aluminum fiber through the one-way valve before detonation, so that the spiral hollow aluminum fiber hydrogen storage composite explosive is obtained.

Control group: 30g of the explosive is wrapped by the spiral hollow aluminum fiber without hydrogen storage inside

And fixing the two groups of experimental samples on the surface of the steel plate for an aerial explosion experiment. The diameter of the cylindrical aerial explosion tank is 2.4m, the length of the cylindrical aerial explosion tank is about 5m, the explosive bag is arranged in the center of the aerial explosion tank, and the change of the surface of the steel plate before and after explosion is observed.

The surface change conditions of the steel plate after the explosion of the spiral hollow aluminum fiber hydrogen storage composite explosive and the control group of explosive are respectively shown in fig. 2 and fig. 3, the surface dent of the steel plate after the explosion of the spiral hollow aluminum fiber hydrogen storage composite explosive is more obvious, and the surface of the steel plate has no unreacted aluminum film and aluminum sheet, which shows that the explosion performance of the explosive is improved by hydrogen, and the crushing and combustion reaction of the spiral aluminum fiber are promoted.

Example 4

Hollow aluminum fiber external diameter 4mm in this embodiment, wall thickness 0.2mm, ladder black explosive component accounts for than: 50% of hexogen and 50% of trinitrotoluene.

The specific preparation method of the double-layer spiral hollow aluminum fiber hydrogen storage composite explosive comprises the following steps:

the hollow aluminum fiber is wound into a spiral shape, the adjacent pipe walls are tightly attached, the spiral hollow aluminum fiber is of a three-layer structure, the inner diameters of the three layers of spiral hollow aluminum fibers are respectively 4mm, 20mm and 36mm, the wall thickness is 4mm, the height is 82mm, ladder black explosive is cast in the outermost layer of spiral hollow aluminum fiber, and the casting height is consistent with the height of the spiral hollow aluminum fiber. One end of the hollow aluminum fiber is sealed, the other end of the hollow aluminum fiber is connected with a one-way valve to ensure the sealing property after high-pressure hydrogen is filled inside, and 8MPa hydrogen is stored in the hollow aluminum fiber through the one-way valve before detonation, so that the three-layer spiral hollow aluminum fiber hydrogen storage composite explosive is obtained.

In the embodiment, the inner layer spiral hollow aluminum fiber structure is fully surrounded by the explosive, hydrogen inside the inner layer spiral hollow aluminum fiber structure mainly participates in the detonation reaction of the explosive, and compared with the case that hydrogen arranged outside the inner layer spiral hollow aluminum fiber structure participates in the detonation reaction of the explosive, the degree is higher, and the diameters of aluminum powder and aluminum sheets formed by crushing the spiral hollow aluminum fiber structure are smaller. The outermost layer of spiral hollow aluminum fiber structure is wrapped outside the explosive, and hydrogen inside the spiral hollow aluminum fiber structure mainly reacts with oxygen in the surrounding environment to maintain the high-temperature environment of detonation and promote the crushing, heating and combustion of aluminum fibers.