Liquid combustible gas-oxygen gas rock breaking device

Abstract

The application discloses a liquid combustible gas-liquid oxygen gas rock breaking device, and relates to the technical field of rock blasting, comprising a blasting tank and an ignition assembly. The blasting tank is internally provided with a first cavity and a second cavity. The first cavity and the second cavity are completely isolated by a partition. The first cavity is used for containing liquid oxygen and combustible material, the second cavity is used for containing liquefied combustible gas, and the partition can be damaged under high-temperature conditions and make the first cavity and the second cavity through. The ignition assembly is used for igniting the combustible material in the first cavity. The application utilizes the combination of liquefied combustible gas and liquid oxygen, and the physical phase change of liquid and the chemical reaction of gas to jointly act on the rock breaking technology, and greatly improves the energy generated by gas blasting.

Description

A liquid combustible gas-liquid oxygen gas rock breaking device Technical Field

[0001] This invention relates to the field of rock blasting technology, and in particular to a liquid combustible gas-liquid oxygen gas rock-breaking device. Background Technology

[0002] Currently, traditional explosive blasting remains the mainstream method for mining, tunnel excavation, and rock breaking. However, in complex environments or where regulations prohibit explosive blasting, mechanical methods such as hammers and rock splitters are slow, inefficient, dangerous, and have low rock utilization. Therefore, gas-based rock breaking technology can accelerate construction and improve rock breaking efficiency. However, traditional gas-based rock breaking technologies, such as liquid carbon dioxide, only utilize the physical phase change from liquid to gas, lacking sufficient energy for blasting. Therefore, a new solution is urgently needed to address these issues. Summary of the Invention

[0003] The purpose of this invention is to provide a liquid combustible gas-liquid oxygen gas rock-breaking device to solve the problems existing in the prior art. The technology of breaking rocks by means of both physical phase change of liquid and chemical reaction of gas greatly increases the energy generated by gas explosion.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides a liquid combustible gas-liquid oxygen gas rock-breaking device, comprising:

[0006] A rupture container has a first cavity and a second cavity, which are completely separated by a partition. The first cavity is used to contain liquid oxygen and combustibles, and the second cavity is used to contain liquefied combustible gas. The partition can be damaged under high temperature conditions, allowing the first cavity and the second cavity to communicate.

[0007] An ignition assembly for igniting the combustible material within the first cavity.

[0008] Preferably, the blasting container consists of an inner container and an outer container surrounding the inner container. The inner container forms the first cavity, and the space between the inner container and the outer container is the second cavity. The inner container is the isolation element.

[0009] Preferably, at least a portion of the inner can is made of iron and forms a weak section, the weak section being annular, while the remainder of the inner can is made of steel.

[0010] Preferably, a burst pressure relief groove is formed on the inner wall of the outer tank.

[0011] Preferably, the rupture container is equipped with a one-way valve, and liquid is injected into the first cavity and the second cavity through the one-way valve; the combustible material is flexible, and the combustible material is filled into the first cavity before the one-way valve is assembled;

[0012] The device includes only one check valve, which has an inlet and an outlet. The check valve is mounted on the rupture container and can move relative to the rupture container so that the outlet is connected to the first cavity and the second cavity respectively.

[0013] Preferably, the one-way valve includes a valve core, a valve body, and a pull rod; the valve body is tubular, with an inlet at the first end and an outlet near the second end; both the outer and inner tanks have mounting holes with opposite positions, allowing the valve body to slide through them; a pull hole is provided on one side of the outer tank, through which a pull rod passes; the pull rod inside the outer tank is fixedly connected to the valve body, and the pull rod outside the outer tank can be limited in position by a limiting mechanism; initially, the outlet is located in the second cavity; after the second cavity is filled, the limiting mechanism releases the pull rod, and the one-way valve slides down under its own weight until the outlet enters the first cavity;

[0014] The top of the pull rod is provided with a limiting part, the cross-sectional dimension of which is larger than that of the pull hole. The one-way valve slides down until the limiting part is stuck on the pull hole and closes the pull hole.

[0015] Preferably, a pull-down spring is provided in the first cavity. One end of the pull-down spring is fixedly connected to the outer wall of the inner tank, and the other end is fixedly connected to the outer wall of the valve body. In the initial state, the pull-down spring is in an extended state. After the limiting mechanism releases the limiting of the pull rod, the pull-down spring has the tendency to return to its original state and pull the valve body into the first cavity.

[0016] Preferably, the limiting mechanism is a fuse, and is provided with a plurality of pull rods, each of which has a through hole. The fuse passes through the plurality of through holes in sequence and limits the pull rods.

[0017] Preferably, an air outlet is provided on the outer wall above the liquid outlet of the valve body, and an air outlet channel is provided in the wall of the valve body. One end of the air outlet channel is connected to the air outlet, and the other end is connected to the outside space.

[0018] Preferably, the ignition assembly includes a plurality of ignition elements, which are arranged on the re-energized line. A channel extending along the length direction is provided on the pipe wall of the valve body. The top end of the re-energized line extends from the channel to the outside of the blasting canister. The gap between the channel and the re-energized line is sealed.

[0019] The present invention achieves the following technical effects compared to the prior art:

[0020] This invention utilizes a technique that combines liquefied combustible gas with liquid oxygen, employing both physical phase change of the liquid and chemical reaction of the gas to break rocks, thereby greatly increasing the energy generated by gas explosion. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 is a schematic diagram of the overall structure of the liquid combustible gas-liquid oxygen gas rock breaking device provided in an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of part of the one-way valve in Figure 1;

[0024] Figure 3 is a schematic diagram of the structure of the one-way valve and the rupture tank in Figure 1;

[0025] Figure 4 is a schematic diagram of the position of the check valve when liquid is being poured into the second chamber;

[0026] Figure 5 is a schematic diagram of the position of the check valve when liquid is being poured into the first cavity;

[0027] Figure 6 is a schematic diagram of the structure of the pull rod, fuse and outer can;

[0028] Figure 7 is a schematic diagram of the inner tank;

[0029] Figure 8 is a schematic diagram showing the connection between the iron part and the steel part of the inner tank;

[0030] Figure 9 is a schematic diagram of the grooved structure on the inner wall of the outer tank;

[0031] Figure 10 is an enlarged schematic diagram of the grooved structure on the inner wall of the outer tank;

[0032] In the diagram: 1-Reinforced line; 2-Cotton wadding; 3-Ignition element; 4-Iron part of the inner tank; 5-Outer tank; 6-Steel part of the inner tank; 7-Vent ring hole; 8-Side wall reinforced line opening; 9-Nut; 10-One-way valve; 11-Pull-down spring; 12-Pull rod; 13-Fuse; 14-Vent hole; 15-Liquid outlet; 16-Mounting hole on top of the inner tank; 17-Side wall hoop; 18-Internal structure; 19-Spring; 20-Hole; 21-Support; 22-Cavity; 23-Opening on the push plug; 24-Push plug; 25-Valve body; 30-Independent cylindrical space leading out the reinforced line; 34-Inner tank; 35-Limiting plate; 36-Vent position; 37-Liquid outlet position; 38-Welding position; 43-Explosion pressure relief groove. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] This invention provides a liquid combustible gas-liquid oxygen gas rock-breaking device, as shown in Figure 1, comprising:

[0036] A rupture container has a first chamber and a second chamber, which are completely separated by a partition. The first chamber is used to contain liquid oxygen and combustibles, and the second chamber is used to contain liquefied combustible gas. The partition can be damaged under high temperature conditions, allowing the first chamber and the second chamber to communicate.

[0037] An ignition assembly, used to ignite the combustibles within the first chamber.

[0038] The ignition component is configured to ignite the combustibles inside the blasting container from outside the blasting container. It can be understood that this embodiment does not limit the specific form of the ignition component, as long as it can ignite the combustibles in the first cavity.

[0039] In operation, the ignition assembly ignites the combustible material in the first chamber. With the aid of liquid oxygen, the combustion provides heat, causing the liquid oxygen and liquefied combustible gas to heat up, expand rapidly, and undergo a liquid-gas phase transition, resulting in the first physical explosion. Under the high pressure of the physical explosion and the high temperature of combustion, the isolating element is damaged, allowing the two chambers to connect. The two gases then come into contact and mix, and under the influence of an open flame, the carbon and hydrogen elements undergo chemical combustion, producing a second chemical explosion that further increases the explosive energy.

[0040] This invention utilizes a technique that combines liquefied combustible gas with liquid oxygen, employing both physical phase change of the liquid and chemical reaction of the gas to break rocks, thereby greatly increasing the energy generated by gas explosion.

[0041] In this embodiment of the invention, the combustible material is preferably cotton wool 2, etc. The outer can 5 is preferably a steel can, etc. The liquefied combustible gas is preferably LPG (liquefied petroleum gas), etc. Of course, none of the three are limited to the above-mentioned materials.

[0042] The above embodiments do not limit the specific structure of the rupture container, that is, they do not limit how the first cavity and the second cavity are formed. This indicates that the present invention can adopt two independently set cavities in any form, such as directly using a partition plate to divide the entire internal space of the container into two cavities or setting two nested cavities. Based on the scheme of two nested cavities, the following description is given: In some embodiments, the rupture container is composed of an inner container 34 and an outer container 5 surrounding the inner container 34. The inner container 34 forms the first cavity, and the space between the inner container 34 and the outer container 5 is the second cavity. The inner container 34 is the isolation element.

[0043] When using the solution provided in this embodiment, the two gases can be fully mixed, and the blasting container can generate uniform annular energy, which facilitates circumferential cutting of rocks. Of course, when some blasting scenarios require directional cutting, the relative positions of the two cavities can be set as needed to control the general direction of the blasting energy.

[0044] In the preferred embodiment, at least a portion of the inner tank 34 is made of iron, forming a weak section, which is the iron part 4 of the inner tank in Figure 7. The weak section is annular. The iron material can burn under the action of pure oxygen. The burning of the iron allows the inner and outer cavities to be connected, and the two gases can come into better contact and mix. The remaining inner tank 34 is made of steel, which is the steel part 6 of the inner tank in Figure 7. Specifically, the top and bottom of the inner tank 34 are made of steel, which makes the middle section of the inner tube a weak section. The weak section is used to guide the gas to release pressure in all directions, avoiding vertical pressure release of the gas, so that the expanding gas acts circumferentially on the surrounding rocks. The expanding gas breaks the tank body and generates a huge impact force, causing the rocks to break.

[0045] It is understood that the specific configuration of the inner tank 34 described above is only a preferred embodiment. In other embodiments, the location of the weak part can be set according to the needs of the blasting. For example, if only one side of the rock needs to be blasted, the inner tank 34 on one side can be made of iron and the explosive gas can be guided to depressurize to one side.

[0046] As for the materials described in the above embodiments, the present invention does not limit them. That is, any material that is not easily damaged or easily damaged can be used to make the inner can 34. The damage can be melting damage or cracking damage, etc.

[0047] When different metal materials are used for manufacturing, the joints between the two materials are welded together, as shown in Figure 8.

[0048] In some embodiments, as shown in Figures 9 and 10, a burst pressure relief groove 43 is formed on the inner wall of the outer tank 5.

[0049] In this embodiment, the material at the blast pressure relief groove 43 is missing, which makes part of the blast pressure relief groove 43 a weak surface. This allows the expanding gas during the explosion to release pressure along this weak surface, effectively dissipating the detonation pressure and acting on the surrounding rock. The blast pressure relief groove 43 is not a completely open space between the inside and outside; rather, it has a slit while ensuring the overall outer shell remains a sealed device. The weakest surface at the slit is designed to withstand pressures sufficient to store flammable liquid gases.

[0050] Specifically, in order to simplify the manufacturing process of the blasting pressure relief groove 43, the blasting pressure relief groove 43 can be formed directly on its inner wall using a slotting process.

[0051] Of course, in this embodiment, multiple explosion relief grooves 43 can be provided along the circumference of the outer tank 5, and the specific number is not limited.

[0052] The above embodiments do not specify how to inject the two liquids into the rupture vessel, indicating that any existing technology that can inject liquid oxygen and liquefied combustible gas into the two cavities can be applied to this application. For example, two valves can be set to correspond to the first cavity and the second cavity respectively, and the valves are preferably one-way valves. However, in order to achieve dual use of one valve and save manufacturing costs, this specification provides the following embodiments, as shown in Figures 2 to 5. In some embodiments, a one-way valve 10 is provided on the rupture vessel, and liquid is injected into the first cavity and the second cavity through the one-way valve 10. The combustible material is flexible and is filled into the first cavity before the one-way valve 10 is assembled. In this embodiment, only one one-way valve 10 is provided. The one-way valve 10 has an inlet and an outlet 15. The one-way valve 10 is set on the rupture vessel and can move relative to the rupture vessel so that the outlet 15 is connected to the first cavity and the second cavity respectively.

[0053] Specifically, the one-way valve 10 includes a valve core, a valve body 25, and a pull rod 12. The valve body 25 is tubular, with an inlet at the first end and an outlet 15 near the second end. Both the outer tank 5 and the inner tank 34 have mounting holes with opposite positions. The valve body 25 can slide through the two mounting holes. A pull hole is provided on one side of the mounting hole on the outer tank 5, and the pull rod 12 passes through the pull hole. The pull rod 12 inside the outer tank 5 is fixedly connected to the valve body 25. The pull rod 12 outside the outer tank 5 can be limited in position by a limiting mechanism. In the initial state, the outlet 15 is located in the second cavity. After the second cavity is filled, the limiting mechanism releases the limit on the pull rod 12, and the one-way valve 10 slides down under its own gravity until the outlet 15 enters the first cavity.

[0054] The valve core, as shown in the figure, includes a push plug 24, a base 21, and a spring 19. The push plug 24 has a sleeve-like structure with a frustum-shaped top and an opening below the frustum. The base 21 has through holes 20 on both sides and is embedded in the outer wall to ensure its fixation. The spring 19 is mounted on the base 21, and the push plug 24 is fitted onto the spring 19. An annular cavity 22 is provided inside the valve chamber, and the cavity 22 is positioned opposite to the opening 23 on the push plug. The valve cavity at the top is also equipped with a limiting annular surface, which works in conjunction with the frustum. Under normal conditions, the push plug 24, under the elastic force of the spring 19, causes the frustum to abut against the limiting annular surface and close the passage of the one-way valve 10. When liquid is injected into the cavity, the liquid overcomes the elastic force of the spring 19 and creates a gap between the frustum and the limiting annular surface to allow the liquid to flow. The liquid flows from the annular cavity 22, the opening, and the hole 20 on the support 21 to the outlet 15 for discharge. The cavity 22, the limiting annular surface structure, etc., are constructed by the internal structure 18.

[0055] The top of the pull rod 12 is equipped with a limiting part, the cross-sectional dimension of which is larger than that of the pull hole. The one-way valve 10 slides down until the limiting part is locked onto the pull hole and seals it. If there are concerns about leakage after liquid vaporization during use, the pull hole and the limiting part can be sealed with aluminum foil tape.

[0056] This embodiment achieves dual-purpose use of a single valve. In use, liquid combustible gas is first injected into the second chamber through the one-way valve 10. After the gas is injected to the set state, the limit mechanism releases the limit on the pull rod 12. The one-way valve 10 slides down under its own gravity until it enters the first chamber through the liquid outlet 15. Liquid oxygen is then injected into the first chamber through the one-way valve 10. Thus, the separate injection of the two liquids is completed.

[0057] Considering that the valve body 25 needs to fit tightly with the mounting hole, and there is friction between the two, in order to facilitate the sliding of the one-way valve 10, in a more preferred embodiment, a pull-down spring 11 is provided in the cavity. One end of the pull-down spring 11 is fixedly connected to the outer wall of the inner tank 34, and the other end is fixedly connected to the outer wall of the valve body 25. In the initial state, the pull-down spring 11 is in the extended state. After the limiting mechanism releases the limit on the pull rod 12, the pull-down spring 11 has the tendency to return to its original state and pull the valve body 25 into the first cavity.

[0058] As shown in Figure 6, the limiting mechanism is a fuse 13, such as an iron wire, and is provided with multiple pull rods 12. Each pull rod 12 has a through hole, and the fuse 13 passes through the multiple through holes in sequence to limit the pull rods 12.

[0059] In some embodiments, an air vent 14 is provided on the outer wall above the liquid outlet 15 of the valve body 25. An air venting channel is formed in the wall of the valve body 25, with one end of the air venting channel connected to the air vent 14 and the other end connected to the outside space. Note that the air vent 14 is not connected to the valve cavity, and the air venting channel is an independent channel. In a preferred embodiment, the valve body 25 can be configured as a double-layered annular pipe with an inner tube and an outer tube. The top of the double-layered annular pipe is an air venting annular hole 7. The air vent 14 is only provided on the outer tube, while the liquid outlet 15 is provided on both the inner and outer tubes and is sealed to prevent liquid from entering the annular channel between the two tubes. Preferably, multiple air vents 14 are provided to facilitate venting when liquid is injected.

[0060] In some embodiments, the ignition assembly includes multiple ignition elements 3, which are disposed on the re-energized wire 1. A channel extending along the length direction is formed within the wall of the valve body 25, forming an independent cylindrical space 30 for leading out the re-energized wire as shown in Figure 3. The top end of the re-energized wire 1 extends from the channel to the outside of the blasting canister. The gap between the channel and the re-energized wire 1 is sealed. The sealing method can be sealant or aluminum foil tape. In use, current is transmitted through the re-energized wire 1, causing the ignition elements 3 to ignite the combustible material.

[0061] In some embodiments, a sealing device is provided to further ensure sealing. The sealing device uses a long nut 9 with threads. An installation tube is provided on the top of the outer tank 5. The one-way valve 10 is installed in the installation tube and can slide relative to it. The installation tube is tightly connected to the outer tank 5. If necessary, it can be set as an integral structure. The top of the valve body 25 is provided with threads, which can be external threads or internal threads. In this embodiment, internal threads are selected. After liquid is injected, the one-way valve 10 structure moves downward relative to the outer tank 5 by a certain distance, as shown in Figure 5. At this time, a long nut 9 with threads is used for sealing.

[0062] A limit plate 35 is provided at the bottom of the valve body 25, and the limit plate 35 is located in the inner tank 34.

[0063] Instructions for use (construction process):

[0064] 1. Connect the LPG filling line to the screw interface on the top of the rupture tank, and then fill with LPG. The LPG enters the second chamber through the lower outlet 15 of the one-way valve 10. The amount of LPG filled is controlled to be a certain distance below the outlet 15 to prevent backflow.

[0065] 2. After filling with LPG, replace the connector with a liquid oxygen filling line, then cut the fuse 13. When the limiting part at the top of the pull rod 12 is completely attached to the outer tank 5, begin filling with liquid oxygen. The liquid oxygen enters the inner cavity from the outlet 15. After the liquid oxygen is filled, remove the liquid oxygen pipe connector and seal it with the nut 9. Wrap the reinforcing wire 1, which is led out from the side wall of the opening, around the gap of the side wall clamp 17, and then tie it in place. Use aluminum foil tape to stick the outlet of the reinforcing wire 1 and the limiting part to improve the airtightness.

[0066] 3. Bring the device filled with liquid to the construction site and have the construction personnel lower it into the drilled blast hole. During construction, the construction personnel should wear gas masks. After the device is lowered to the bottom of the hole, backfill with drilling mud, connect the re-line 1 to the ignition device, and transmit an electrical signal to the ignition element 3 in the inner cavity of the device through the re-line 1. The flame of the ignition element 3 and the cotton wadding 2 in the inner tank 34 burn under the action of liquid oxygen, and then an explosion occurs.

[0067] Precautions:

[0068] 1. The filled device should be stored in a cool, low-temperature environment, avoiding direct sunlight. The storage time should not be too long, and it should be filled within one day before construction if possible.

[0069] 2. During construction operations, workers should wear gas masks at all times. After the blasting is completed, they should wait for a period of time before proceeding to the broken rock area for the next step of the work.

[0070] Basic principle:

[0071] 1. The combustion of cotton wadding 2, aided by liquid oxygen, provides heat, causing the temperature of liquid oxygen and LPG to rise, their volume to expand rapidly, resulting in a liquid-gas phase transition and the first physical explosion.

[0072] 2. The weak part on the inner tank 34 is used to guide the gas to release pressure in all directions, avoid vertical gas pressure release, and make the expanding gas act on the surrounding rocks in a circumferential direction. The expanding gas breaks the tank body and generates a huge impact force, causing the rocks to break.

[0073] 3. The middle section of the inner tank 34 is made of iron. The iron material can burn under the action of pure oxygen. The combustion of iron makes the inner and outer cavities connected, allowing the two gases to come into better contact and mix.

[0074] 4. The gas produced by the phase change of LPG and liquid oxygen mixes and enters the cracks in the rock. Under the action of an open flame, the C and H elements undergo chemical combustion, producing a second chemical explosion that further breaks the rock.

[0075] 5. The one-way valve 10 is in a closed state under the action of the spring 19. When filling with liquid, the liquid pressure pushes the push plug 24 downward, and the liquid flows in smoothly. When no pressure is applied, the push plug 24 returns to its original position under the action of the spring 19, and the liquid and gas in the tank cannot flow out through the valve.

[0076] 6. The vent 14 and the one-way valve 10 are integrated into one structure to avoid opening a separate vent on the outer box inner tank 34. The vent 14 is used to discharge the gas in the tank when liquid is injected to balance the pressure and ensure smooth liquid injection.

[0077] 7. The entire one-way valve 10 is controlled to move by a pull-down spring 11 and a pull rod 12 in a state of elastic tension. The amount of deformation that the pull-down spring 11 should recover in the tension state is greater than the length of the pull rod 12. When the fuse 13 is cut, the pull rod 12 moves into the rupture tank under the action of the recovery deformation of the pull-down spring 11. The top of the pull rod 12 is stuck on the outer wall of the tank. The liquid outlet 15 and the vent 14 are introduced into the first cavity, realizing the dual function of one valve.

[0078] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A liquid combustible gas-liquid oxygen gas rock-breaking device, characterized in that: include: A rupture container having a first chamber and a second chamber, which are completely separated by a separator. The first chamber contains liquid oxygen and combustible material, and the second chamber contains liquefied combustible gas. The separator is capable of being destroyed under high temperature conditions, allowing the first chamber and the second chamber to communicate. An ignition assembly is used to ignite the combustible material in the first chamber.

2. The liquid combustible gas-liquid oxygen gas rock-breaking device according to claim 1, characterized in that: The blasting container consists of an inner container and an outer container surrounding the inner container. The inner container forms the first cavity, and the space between the inner container and the outer container is the second cavity. The inner container is the isolation component.

3. The liquid combustible gas-liquid oxygen gas rock-breaking device according to claim 2, characterized in that: At least a portion of the inner can is made of iron and forms a weak section, the weak section being annular, while the remainder of the inner can is made of steel.

4. The liquid combustible gas-liquid oxygen gas rock-breaking device according to claim 2, characterized in that: A rupture pressure relief groove is provided on the inner wall of the outer tank.

5. The liquid combustible gas-liquid oxygen gas rock-breaking device according to claim 2, characterized in that: The rupture container is equipped with a one-way valve, through which liquid is injected into the first cavity and the second cavity; the combustible material is flexible and is filled into the first cavity before the one-way valve is assembled; wherein, only one one-way valve is provided, the one-way valve has a liquid inlet and a liquid outlet, the one-way valve is provided on the rupture container and can move relative to the rupture container so that the liquid outlet is connected to the first cavity and the second cavity respectively.

6. The liquid combustible gas-liquid oxygen gas rock-breaking device according to claim 5, characterized in that: The one-way valve includes a valve core, a valve body, and a pull rod. The valve body is tubular, with an inlet at one end and an outlet near the second end. Both the outer and inner tanks have mounting holes facing each other, allowing the valve body to slide through them. A pull hole is located on one side of the outer tank, through which the pull rod passes. The pull rod inside the outer tank is fixedly connected to the valve body, while the pull rod outside the outer tank is positioned by a limiting mechanism. Initially, the outlet is located in the second cavity. After filling the second cavity, the limiting mechanism releases the pull rod, causing the one-way valve to slide down under its own weight until the outlet enters the first cavity. A limiting part is located at the top of the pull rod, with a cross-sectional dimension larger than the pull hole. The one-way valve slides down until the limiting part engages with the pull hole, sealing it.

7. The liquid combustible gas-liquid oxygen gas rock-breaking device according to claim 6, characterized in that: A pull-down spring is provided in the first cavity. One end of the pull-down spring is fixedly connected to the outer wall of the inner tank, and the other end is fixedly connected to the outer wall of the valve body. In the initial state, the pull-down spring is in the extended state. After the limiting mechanism releases the limiting of the pull rod, the pull-down spring has the tendency to return to its original state and pull the valve body into the first cavity.

8. The liquid combustible gas-liquid oxygen gas rock-breaking device according to claim 6, characterized in that: The limiting mechanism is a fuse and is provided with multiple pull rods. Each of the multiple pull rods is provided with a through hole. The fuse passes through the multiple through holes in sequence and limits the pull rods.

9. The liquid combustible gas-liquid oxygen gas rock-breaking device according to claim 6, characterized in that: An air vent is provided on the outer wall above the liquid outlet of the valve body, and an air vent channel is provided inside the wall of the valve body. One end of the air vent channel is connected to the air vent, and the other end is connected to the outside space.

10. The liquid combustible gas-liquid oxygen gas rock-breaking device according to claim 6, characterized in that: The ignition assembly includes multiple ignition elements, which are arranged on the re-energized line. A channel extending along the length direction is provided on the pipe wall of the valve body. The top end of the re-energized line extends from the channel to the outside of the blasting canister. The gap between the channel and the re-energized line is sealed.

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