A liquid oxygen injection liquid

Abstract

This utility model discloses a liquid oxygen injection system, comprising a hollow tube, an outer tube fixedly connected to the outer wall of the hollow tube, multiple through holes through the hollow tube, a piece of paper fixedly connected to the outer wall of the hollow tube, two electric match heads installed between the outer wall of the paper and the inner wall of the outer tube, each electric match head connected to a branch wire, the two branch wires connected to a main wire, an injection oxygen tube fixedly connected to the hollow tube and the outer tube, and a sealing cap threaded to the bottom of the hollow tube. This utility model adopts a design of temporarily injecting liquid oxygen before blasting, avoiding the pre-mixing of liquid oxygen with flammable materials, fundamentally reducing the risk of explosion during storage, transportation and filling.

Description

Technical Field

[0001] This utility model relates to the field of liquid oxygen blasting technology, and in particular to a liquid oxygen injection method. Background Technology

[0002] In the field of blasting engineering, the development of blasting technology is crucial for industries such as mining and tunnel excavation. Traditional blasting methods often use solid explosives. However, solid explosives pose high safety risks during storage and transportation, and some explosives produce a large amount of harmful gases after detonation, causing environmental pollution.

[0003] To address the aforementioned issues, liquid oxygen explosives have gradually become a research hotspot due to their wide availability of raw materials, low cost, and relative environmental friendliness. Existing liquid oxygen explosive devices mostly employ the method of pre-mixing liquid oxygen with combustible materials. However, the pre-mixing process increases the complexity and danger of operation. During mixing, transportation, and loading, even slight carelessness may lead to accidental explosions. To solve the above problems, this application proposes a liquid oxygen injection method. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a liquid oxygen injection method. This method employs a design that temporarily injects liquid oxygen before blasting, avoiding the pre-mixing of liquid oxygen with flammable materials and fundamentally reducing the risk of explosion during storage, transportation, and loading.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A liquid oxygen injection device includes a hollow tube, an outer tube fixedly connected to the outer wall of the hollow tube, multiple through holes through the hollow tube, a piece of paper fixedly connected to the outer wall of the hollow tube, two electric match heads installed between the outer wall of the paper and the inner wall of the outer tube, each electric match head connected to a branch wire, the two branch wires connected to a main wire, an injection oxygen tube fixedly connected to the hollow tube and the outer tube, and a sealing cap threaded to the bottom of the hollow tube.

[0007] Preferably, the plurality of through holes are distributed at equal intervals, the diameter of the hollow tube is 10 mm, and the distance between two adjacent through holes is 30 mm.

[0008] Preferably, the outer wall of the hollow tube is fixed to the inner wall of the paper by adhesive bonding, and both ends of the electric match head are fixed to the outer wall of the paper and the inner wall of the outer tube by adhesive bonding.

[0009] Preferably, the center of the hollow tube, the center of the liquid oxygen injection tube, and the center of the outer tube are coaxially arranged.

[0010] Preferably, the outer wall of the sealing cap is provided with external threads, and the inner wall of the outer tube is provided with internal threads that mate with the external threads.

[0011] Preferably, a pressure relief pipe is fixedly connected to the top of the hollow tube, and a pressure relief valve is fixedly connected to the outer wall of the pressure relief pipe.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] 1. The design of temporarily injecting liquid oxygen before blasting avoids the pre-mixing of liquid oxygen with combustible materials, fundamentally reducing the risk of explosion during storage, transportation and loading.

[0014] 2. The evenly spaced through holes ensure that the liquid oxygen evenly wets the combustible paper. The electric match head is remotely ignited by a special detonator through a wire, ensuring reliable ignition. This allows the liquid oxygen to fully and violently react with the combustible paper, releasing energy fully and forming a high-pressure shock wave. The explosive power is stable and can achieve the expected effect.

[0015] 3. The sealing cover is removable via a threaded connection, facilitating the inspection and replacement of internal components.

[0016] 4. A pressure relief valve is installed on the surface of the outer pipe. When the internal pressure exceeds the threshold, the pressure is automatically released, which improves the adaptability of the device under complex working conditions and avoids safety accidents caused by excessive pressure.

[0017] In summary, the design of temporarily injecting liquid oxygen before blasting avoids the pre-mixing of liquid oxygen with flammable materials, fundamentally reducing the risk of explosion during storage, transportation, and loading. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a liquid oxygen injection structure proposed in this utility model;

[0019] Figure 2 This is a cross-sectional schematic diagram of a liquid oxygen injection system proposed in this utility model.

[0020] In the diagram: 1 hollow tube, 2 through hole, 3 paper, 4 electric match head, 5 branch line, 6 main line, 7 liquid oxygen injection tube, 8 pressure relief tube, 9 pressure relief valve, 10 sealing cap, 11 outer tube. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-2A liquid oxygen injection system includes a hollow tube 1, which provides a flow channel for liquid oxygen. An outer tube 11 is fixedly connected to the outer wall of the hollow tube 1, which protects and seals the internal components. Together, they form a space to contain liquid oxygen. Multiple through holes 2 are opened through the hollow tube 1. The through holes 2 can wet paper 3 with liquid oxygen and fill the outer tube 11 with liquid oxygen. The multiple through holes 2 are evenly distributed. The diameter of the hollow tube 1 is 10 mm, and the distance between two adjacent through holes 2 is 30 mm.

[0023] The outer wall of the hollow tube 1 is fitted with a piece of paper 3, which is combustible paper. The outer wall of the hollow tube 1 and the inner wall of the paper 3 are fixed together by adhesive. Two electric match heads 4 are installed between the outer wall of the paper 3 and the inner wall of the outer tube 11. The electric match heads 4 can produce a flame when energized. Both ends of the electric match heads 4 are fixed to the outer wall of the paper 3 and the inner wall of the outer tube 11 by adhesive. Each electric match head 4 is connected to a branch wire 5. The two branch wires 5 are connected to a main wire 6. The main wire 6 is connected to an external detonator. The detonator ignites the electric match head 4. Upon activation, the electric match head 4 acts as the igniter, causing a violent chemical reaction between the evaporated liquid oxygen and the paper. This generates a large amount of heat, raising the temperature. Simultaneously, this heat causes the liquid oxygen to undergo a phase change at high temperatures, rapidly expanding and forming a high-pressure shock wave, thereby triggering an explosion. The paper 3, as a combustible material, comes into contact with the liquid oxygen and is ignited by the electric match head 4, resulting in combustion. The electric match head 4 provides the ignition source and receives electrical energy from an external detonator through branch line 5 and main line 6, enabling remote and controllable ignition. Branch line 5 and main line 6 work together to transmit electrical energy, ensuring the normal activation of the electric match head 4.

[0024] A liquid oxygen injection pipe 7 is fixedly connected to both the hollow tube 1 and the outer tube 11. The outer end of the liquid oxygen injection pipe 7 is connected to a connector, allowing connection to an external liquid oxygen tank to inject liquid oxygen into the hollow tube 1. A valve is installed on the outer wall of the liquid oxygen injection pipe 7 to ensure the airtightness of the device. A sealing cap 10 is threadedly connected to the bottom of the hollow tube 1, and the two are threadedly sealed. The outer wall of the sealing cap 10 has external threads, and the inner wall of the outer tube 11 has internal threads that mate with the external threads. The sealing cap 10 can be removed by rotating it for maintenance. The centers of the hollow tube 1, the liquid oxygen injection pipe 7, and the outer tube 11 are coaxial. The liquid oxygen injection pipe 7 is used to introduce liquid oxygen from an external liquid oxygen tank into the hollow tube 1. The valve controls the injection volume of liquid oxygen and prevents leakage. The sealing cap 10 is detachable via a threaded connection, facilitating the maintenance and replacement of internal components.

[0025] In this invention, the device temporarily stores liquid oxygen in the borehole, ensuring it is in full contact with combustible paper. Inside the container are cleverly placed electric match heads, liquid oxygen, and paper. The liquid oxygen is only added to the injection liquid within the underground borehole before detonation. The electric match heads in the injection liquid are detonated via a wire by a dedicated detonator, thereby detonating all the boreholes in the blasting area. This ensures full contact between the liquid oxygen and the combustible paper. Under the action of the ignition source, the evaporated liquid oxygen undergoes a violent chemical reaction with the combustible paper, generating a large amount of heat that raises the temperature. Simultaneously, this heat causes the liquid oxygen to undergo a phase change at high temperatures, rapidly expanding and forming a high-pressure shock wave, thus triggering the explosion.

Claims

1. A liquid oxygen injection liquid comprising a hollow tube (1), characterized in that, The hollow tube (1) is fitted with an outer tube (11) fixedly connected to it. Multiple through holes (2) are opened through the hollow tube (1). Paper (3) is fitted with the outer wall of the hollow tube (1) and fixedly connected to it. Two electric match heads (4) are installed between the outer wall of the paper (3) and the inner wall of the outer tube (11). Each electric match head (4) is connected to a branch line (5). The two branch lines (5) are connected to a main line (6). Liquid oxygen injection tube (7) is fixedly connected to the hollow tube (1) and the outer tube (11). A sealing cap (10) is threaded to the bottom of the hollow tube (1).

2. A liquid oxygen injection liquid according to claim 1, wherein, The multiple through holes (2) are distributed at equal intervals. The diameter of the hollow tube (1) is 10 mm, and the distance between two adjacent through holes (2) is 30 mm.

3. The liquid oxygen injection liquid of claim 1, wherein, The outer wall of the hollow tube (1) is fixed to the inner wall of the paper (3) by adhesive bonding, and both ends of the electric match head (4) are fixed to the outer wall of the paper (3) and the inner wall of the outer tube (11) by adhesive bonding.

4. The liquid oxygen injection liquid of claim 1, wherein, The center of the hollow tube (1), the center of the liquid oxygen tube (7), and the center of the outer tube (11) are arranged coaxially.

5. The liquid oxygen injection fluid of claim 1, wherein, The outer wall of the sealing cap (10) is provided with an external thread, and the inner wall of the outer tube (11) is provided with an internal thread that matches the external thread.

6. The liquid oxygen injection fluid of claim 1, wherein, The top of the hollow tube (1) is fixedly connected to a pressure relief pipe (8), and the outer wall of the pressure relief pipe (8) is fixedly connected to a pressure relief valve (9).

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