A device for non-pyrotechnically stimulating the expansion of liquid carbon dioxide

Abstract

A device for non-pyrotechnic excitation of liquid carbon dioxide expansion comprises a first container, a second container, liquid carbon dioxide and sodium percarbonate, wherein the liquid carbon dioxide is filled in a sealed first container, the sodium percarbonate is filled in a sealed second container, the second container is arranged in the first container, a heating element for electrically heating the sodium percarbonate is arranged inside the second container, and a cable of the heating element extends outside the first container; the sodium percarbonate undergoes thermal decomposition and releases heat under heating conditions, the second container ruptures to release the sodium percarbonate into the first container, the sodium percarbonate released into the first container continues to release heat and heat the liquid carbon dioxide, so that the liquid carbon dioxide expands and breaks through the constraint of the first container. The sodium percarbonate of the present invention belongs to a strong oxidant, has no reducing agent inside, does not belong to pyrotechnic products, is convenient for transportation and storage, and has high safety; after the sodium percarbonate is decomposed, oxygen is generated, which is conducive to the liquid carbon dioxide expanding under heat and breaking through the constraint, and no harmful gas is generated.

Description

Technical Field

[0001] The invention relates to the technical field of carbon dioxide explosion and propulsion drive, and in particular to a device for non-pyrotechnically stimulating the expansion of liquid carbon dioxide. Background Art

[0002] Carbon dioxide blasting refers to the process of carbon dioxide changing from liquid to gas under high temperature stimulation. During the blasting process, the highly compressed liquid carbon dioxide expands rapidly due to heat, breaks through the constraints of the container, and forms a strong impact force. The carbon dioxide absorbs heat during the whole process and does not produce harmful gases. Compared with traditional explosive chemical blasting, liquid carbon dioxide blasting has the advantages of safety, simple workpieces, strong controllability and good explosion effect. At present, this technology is widely used in various engineering construction, such as tunnel and trench excavation, mining, road construction groundbreaking operations, underwater blasting operations, and missile propulsion drive, etc.

[0003] At present, most carbon dioxide blasting uses gunpowder to detonate, and the gunpowder combustion needs to provide sufficient heat to achieve detonation. The safety performance of gunpowder detonation is poor, and the high temperature of gunpowder detonation will also produce some toxic gases. Therefore, it is necessary to improve the existing carbon dioxide blasting technology. Summary of the invention

[0004] Based on this, the present invention provides a device for non-pyrotechnically stimulating the expansion of liquid carbon dioxide to solve the technical problems of the prior art carbon dioxide blasting technology having poor safety performance, releasing toxic gases and polluting the environment.

[0005] To achieve the above-mentioned purpose, the present invention provides a device for non-pyrotechnically induced expansion of liquid carbon dioxide, comprising a first container, a second container, liquid carbon dioxide and sodium percarbonate, wherein the liquid carbon dioxide is filled in the first sealed container, the sodium percarbonate is filled in the second sealed container, the second container is arranged in the first container, a heating element for electrically heating the sodium percarbonate is arranged inside the second container, and a cable of the heating element extends to the outside of the first container; the sodium percarbonate undergoes thermal decomposition and releases heat under heating conditions, and at the same time the second container ruptures to release the sodium percarbonate into the first container, and the sodium percarbonate released into the first container continues to release heat and heat the liquid carbon dioxide, thereby causing the liquid carbon dioxide to expand and break through the constraint of the first container.

[0006] As a further preferred technical solution of the present invention, the mass ratio of the sodium percarbonate to the liquid carbon dioxide is 1:50-60.

[0007] As a further preferred technical solution of the present invention, the mass ratio of the sodium percarbonate to the liquid carbon dioxide is 1:55.

[0008] As a further preferred technical solution of the present invention, the first container is made of metal, and the second container is made of plastic.

[0009] As a further preferred technical solution of the present invention, at least one air leakage hole is provided on the first container, and the air leakage hole is sealed by a bursting piece.

[0010] As a further preferred technical solution of the present invention, when the device for non-pyrotechnically induced expansion of liquid carbon dioxide is applied to a thruster, the air leakage hole of the first container is connected to a Lava tube.

[0011] As a further preferred technical solution of the present invention, the density of the sodium percarbonate released into the first container and the density of the liquid carbon dioxide in the first container are in the range of 0.6-1.2 g / cm 3 .

[0012] As a further preferred technical solution of the present invention, the heating element is a heating tube or a heating wire.

[0013] As a further preferred technical solution of the present invention, the cable is connected to a power source and a controller outside the first container, and the controller is used to control the power supply on and off of the heating element.

[0014] The device for non-pyrotechnically excited liquid carbon dioxide expansion of the present invention can achieve the following beneficial effects by adopting the above technical solution:

[0015] 1) The present invention uses sodium percarbonate as the exciting substance for carbon dioxide blasting and propulsion driving. Sodium percarbonate is a strong oxidant, but has no reducing agent inside, is not an explosive, is convenient for transportation and storage, and has high safety;

[0016] 2) The sodium percarbonate of the present invention is easy to decompose at high temperature and releases heat during thermal decomposition. A small amount of heat is required to achieve autonomous decomposition of sodium percarbonate while releasing a large amount of heat;

[0017] 3) The sodium percarbonate of the present invention will generate oxygen after decomposition, which is beneficial for the liquid carbon dioxide to expand under heat and break through the constraints, and no harmful gas will be generated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Figure 1 A schematic structural diagram of an example of a device for non-pyrotechnically induced liquid carbon dioxide expansion according to the present invention.

[0020] In the figure: 1. liquid carbon dioxide, 2. first container, 3. second container, 4. sodium percarbonate, 5. heating element, 6. cable.

[0021] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The terms such as "upper", "lower", "left", "right", "middle" and "one" cited in the preferred embodiments are only for the convenience of description, and are not used to limit the scope of the present invention. The change or adjustment of the relative relationship shall also be regarded as the scope of the present invention without substantially changing the technical content.

[0023] like Figure 1 As shown, the present invention provides a device for non-pyrotechnic excitation of liquid carbon dioxide expansion, the device comprises a first container 2, a second container 3, liquid carbon dioxide 1 and sodium percarbonate 4, the liquid carbon dioxide 1 is filled in the first sealed container 2, the sodium percarbonate 4 is filled in the second sealed container 3, the mass ratio of the liquid sodium percarbonate 4 to the carbon dioxide 1 is 1:50-60, and the sodium percarbonate 4 is used as an exciting substance driven by carbon dioxide explosion and propulsion. The advantage is that although the sodium percarbonate 4 is a strong oxidant, it does not contain a reducing agent inside, and does not belong to a pyrotechnic product, so it is convenient to transport and store, and has high safety.

[0024] The second container 3 is disposed in the first container 2, and a heating element 5 for electrically heating the sodium percarbonate 4 is disposed inside the second container 3, and a cable 6 of the heating element 5 extends outside the first container 2. In a specific implementation, the heating element 5 can be a heating tube or a heating wire, and of course, can also be other heating devices, which are not listed one by one here.

[0025] The sodium percarbonate 4 is thermally decomposed and releases heat under heating conditions. Therefore, the sodium percarbonate 4 can achieve autonomous decomposition without excessive heat and release a large amount of heat. The second container 3 releases the sodium percarbonate 4 into the first container 2 by mechanical opening or thermal rupture. The density of the sodium percarbonate 4 released into the first container 2 is in the range of 0.6-1.2 g / cm 3 The sodium percarbonate 4 released into the first container 2 during thermal decomposition continues to release heat and heats the liquid carbon dioxide 1, so that the liquid carbon dioxide 1 rapidly expands and breaks through the constraint of the second container 3. At this time, the sodium percarbonate 4 generates oxygen after thermal decomposition, which helps the rapid expansion of the liquid carbon dioxide, thereby achieving the blasting or propulsion drive of the carbon dioxide. That is, the device for non-pyrotechnic excitation of liquid carbon dioxide expansion of the present invention can be used as a blasting source for blasting operations or a propulsion power source for a thruster.

[0026] The sodium percarbonate 4 used in the present invention is an inorganic substance and a strong oxidant with a molecular formula of 2Na2CO3·3H2O2 or Na2CO3·1.5 H2O2. It is an unstable complex formed by a three-component system of sodium carbonate, hydrogen peroxide and water using hydrogen bonds. It is easy to decompose at high temperatures and generate a lot of heat.

[0027] In a preferred embodiment, the optimal mass ratio of liquid sodium percarbonate 4 to carbon dioxide 1 is 1:55. With this ratio, the sodium percarbonate 4 released into the first container 2 can be fully mixed with the liquid carbon dioxide, so that the sodium percarbonate 4 releases heat evenly.

[0028] In a specific implementation, carbon dioxide is highly compressed into liquid and filled in the first container 2, and the first container 2 is made of metal to withstand sufficient internal pressure. The first container 2 is provided with at least one air leakage hole, which is sealed by a bursting piece. When the liquid carbon dioxide 1 is heated and rapidly expands and explodes, it breaks through the bursting piece and rushes out of the air leakage hole, thus forming a strong impact force, thereby achieving blasting or propulsion driving. Specifically, the material of the second container 3 is plastic, and the high temperature when the sodium percarbonate 4 releases heat can destroy the second container 3 made of plastic, so that the sodium percarbonate 4 can be released into the first container 2 to achieve full mixing with the liquid carbon dioxide.

[0029] Preferably, when the device for expanding liquid carbon dioxide 1 by non-pyrotechnic stimulation is applied to a thruster, the air leakage hole of the first container 2 is connected to a Lava tube.

[0030] In another specific implementation, the cable 6 is connected to a power source and a controller outside the first container 2 , and the controller is used to control the power supply of the heating element 5 .

[0031] The device for non-pyrotechnically induced liquid carbon dioxide expansion of the present invention can be used as a blasting source and a propulsion power source. For example, when used as a blasting source, it can be applied to tunnel and trench excavation, mining, road construction groundbreaking operations, and underwater blasting operations. When used as a propulsion power source, it can be applied to the propulsion drive of missiles.

[0032] Although specific embodiments of the present invention are described above, those skilled in the art should understand that these are merely examples and that various changes or modifications may be made to the embodiments without departing from the principles and essence of the present invention. The scope of protection of the present invention is limited only by the appended claims.

Claims

1. A device for non-pyrotechnically stimulating the expansion of liquid carbon dioxide, It is characterized in that The invention comprises a first container, a second container, liquid carbon dioxide and sodium percarbonate, wherein the liquid carbon dioxide is filled in the first sealed container, the sodium percarbonate is filled in the second sealed container, the second container is arranged in the first container, a heating element for electrically heating the sodium percarbonate is arranged inside the second container, and a cable of the heating element extends outside the first container; the sodium percarbonate undergoes thermal decomposition and releases heat under heating conditions, and at the same time the second container ruptures to release the sodium percarbonate into the first container, and the sodium percarbonate released into the first container continues to release heat and heat the liquid carbon dioxide, thereby causing the liquid carbon dioxide to expand and break through the constraint of the first container.

2. The device for non-pyrotechnically induced expansion of liquid carbon dioxide according to claim 1, It is characterized in that The mass ratio of the sodium percarbonate to the liquid carbon dioxide is 1:50-60.

3. The device for non-pyrotechnically induced expansion of liquid carbon dioxide according to claim 2, It is characterized in that The mass ratio of the sodium percarbonate to the liquid carbon dioxide is 1:

55.

4. The device for non-pyrotechnically induced expansion of liquid carbon dioxide according to claim 1, It is characterized in that The first container is made of metal, and the second container is made of plastic.

5. The device for non-pyrotechnically induced expansion of liquid carbon dioxide according to claim 4, It is characterized in that The first container is provided with at least one air leakage hole, and the air leakage hole is sealed by a bursting piece.

6. The device for non-pyrotechnically induced expansion of liquid carbon dioxide according to claim 5, It is characterized in that When the device for non-pyrotechnically induced expansion of liquid carbon dioxide is applied to a thruster, the air leakage hole of the first container is connected to a Lava tube.

7. The device for non-pyrotechnically induced expansion of liquid carbon dioxide according to claim 1, It is characterized in that The density of the sodium percarbonate released into the first container and the density of the liquid carbon dioxide in the first container are both 0.6-1.2 g / cm 3 .

8. The device for non-pyrotechnically induced expansion of liquid carbon dioxide according to claim 1, It is characterized in that The heating element is a heating tube or a heating wire.

9. The device for non-pyrotechnically activated liquid carbon dioxide expansion according to any one of claims 1 to 8, It is characterized in that The cable is connected to a power source and a controller outside the first container, and the controller is used to control the power supply on and off of the heating element.

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