Nitrogen-oxygen liquid mixture energy storage pipe for breaking rock

Abstract

The utility model provides a nitrogen-oxygen liquid mixture energy storage pipe for rock breaking, and belongs to the technical field of rock breaking. An absorbent, an ignition element, an exhaust pipe and an ignition element leg wire are arranged in a flexible shell, a pipe opening sealing piece is further arranged at the top of the flexible shell, and a central liquid filling pipe is vertically arranged in the flexible shell; the central liquid filling pipe comprises a first liquid filling pipe and a second liquid filling pipe, a group of liquid leakage holes are uniformly distributed in the side walls of the first liquid filling pipe and the second liquid filling pipe, a drainage device for optimizing fluid flowing is arranged between every two adjacent liquid leakage holes, and the drainage devices are spiral flow deflectors or turbulent flow mechanisms; the fluid is guided to move along a specific path or generate turbulent flow, so that the mixing uniformity of the fluid is enhanced, the nitrogen-oxygen liquid mixture is more uniformly distributed during filling, and the local concentration is prevented from being too high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rock breaking, and particularly relates to a nitrogen-oxygen liquid mixture energy storage tube for rock breaking. BACKGROUND

[0002] Currently, common rock breaking methods include explosive blasting, mechanical breaking and gas rock breaking, etc. The explosive blasting method has advantages of mature construction technology and high efficiency, but has disadvantages of high risk, large amount of powder, flying stones, noise, blasting vibration and the like. The mechanical breaking method has advantages of small vibration and less dust, but has disadvantages of high cost and low efficiency. The gas rock breaking technology includes carbon dioxide fracturing rock breaking technology and liquid oxygen gas rock breaking technology, etc. The carbon dioxide fracturing rock breaking technology has disadvantages of low rock breaking efficiency, high cost and low yield. The liquid oxygen gas rock breaking technology has great insecurity in use because the liquid oxygen used has toxicity, strong oxidizing property and strong activity, and the mixture of liquid oxygen and combustible material is easy to explode, catch fire and cause casualties when encountering open flame, electric spark, static electricity and impact.

[0003] Chinese patent CN222012905U provides a liquid oxygen energy storage free assembly rock breaking device based on liquid oxygen, which comprises a first energy storage tube, a first oxygen charging tube is sleeved in the first energy storage tube, and a through hole is arranged in the side wall of the first oxygen charging tube; a second energy storage tube, a second oxygen charging tube is sleeved in the second energy storage tube, and a through hole is arranged in the side wall of the second oxygen charging tube; the second oxygen charging tube and the first oxygen charging tube are connected in communication through a connecting assembly; it can be seen that the through hole is arranged on the side wall of the oxygen charging tube to realize the injection of liquid oxygen, but the through hole is randomly arranged on the side wall, and only the injection of liquid oxygen into the energy storage tube can be ensured, but whether the absorbent can be fully contacted cannot be ensured. At the same time, if mixed gas is used for rock breaking, the uniformity of the mixture injected into the energy storage tube cannot be ensured. SUMMARY

[0004] The present application aims at the problems that the prior art cannot ensure that liquid oxygen is fully contacted with absorbent and if mixed gas is used for rock breaking, the mixture cannot be uniformly injected into the energy storage tube and fully contacted with the absorbent, and provides a nitrogen-oxygen liquid mixture energy storage tube for rock breaking, which is provided with a drainage device in the center liquid charging tube, the drainage device is a spiral guide vane or a spoiler mechanism, the nitrogen-oxygen liquid mixture is changed in direction and speed distribution through the simple structure, and the mixing of the nitrogen-oxygen liquid mixture and the absorbent is promoted.

[0005] Technical solution: The application provides a nitrogen-oxygen liquid mixture energy storage tube for rock breaking, which comprises a flexible shell, the flexible shell is an outer membrane, the outer membrane has excellent strength, softness, sealing performance and low temperature resistance, the outer membrane is made of plastic, preferably polyvinyl chloride film, polyethylene film, polyamide film and the like, and the nitrogen-oxygen liquid mixture, absorbent, ignition element and central liquid filling pipe can be wrapped in the flexible shell; wherein the nitrogen-oxygen liquid mixture is a uniform liquid mixed by liquid nitrogen and liquid oxygen in a certain proportion. The flexible shell is provided with an absorbent, an ignition element, an exhaust pipe and a foot line of the ignition element, and the top of the flexible shell is further provided with a pipe opening sealing element, the pipe opening sealing element is used for sealing the outer membrane at the pipe opening of the energy storage tube, and the upper end part of the central liquid filling pipe and the end of the exhaust pipe connected to the atmosphere of the energy storage tube assembly remain unobstructed, and the pipe opening sealing element needs to ensure that the other parts are fully sealed and there is no liquid leakage and air leakage. The central liquid filling pipe is vertically arranged in the flexible shell, the central liquid filling pipe comprises a first liquid filling pipe and a second liquid filling pipe, the lower end of the first liquid filling pipe reaches the bottom of the flexible shell, the upper end of the first liquid filling pipe extends out of the flexible shell, the lower end of the second liquid filling pipe is in communication with the upper part of the first liquid filling pipe, and the upper end of the second liquid filling pipe extends out of the flexible shell. A group of liquid leakage holes are uniformly distributed on the side walls of the first liquid filling pipe and the second liquid filling pipe, and a shunt device for optimizing fluid distribution and a drainage device for optimizing fluid flow are arranged between every two adjacent liquid leakage holes; the shunt device is located on the outer wall of the first liquid filling pipe, and the drainage device is located on the inner wall of the first liquid filling pipe; the shunt device comprises two branch pipes in communication with the first liquid filling pipe, and the ends of the branch pipes away from the first liquid filling pipe extend to the edge of the absorbent. The shunt device can balance the flow between each liquid leakage hole, avoid local overload or deficiency, the branch pipes extend to the edge of the absorbent, solve the problem that the edge of the absorbent cannot be absorbed, and enable the absorbent to fully absorb the nitrogen-oxygen liquid mixture; the shunt device can guide the fluid to move along a specific path or generate turbulence, enhance the mixing uniformity of the fluid, enable the nitrogen-oxygen liquid mixture to be more uniformly distributed when being filled, and avoid local high concentration. The central liquid filling pipe and the drainage device are made of metal, preferably metal iron, metal aluminum and the like.

[0006] Further, the drainage device is a spiral flow guide vane or a turbulence mechanism, which changes the direction and velocity distribution of the nitrogen-oxygen liquid mixture through a simple structure, promotes the mixing of the nitrogen-oxygen liquid mixture and the absorbent, and achieves uniform distribution.

[0007] Further, the spiral flow guide vane is a continuously twisted sheet body, which extends axially along the central liquid filling pipe, divides the flow channel and forms a bidirectional spiral channel. The spiral structure can guide the liquid to rotate, increase the contact area and mixing effect, divide the flow channel through the spiral flow guide vane, form a rotational flow and promote mixing. The spiral angle of the spiral flow guide vane gradually decreases from the inlet to the outlet, the initial high turbulence promotes mixing, and the subsequent resistance is reduced.

[0008] Further, the width of the helical guide vane is half of the diameter of the central liquid filling tube.

[0009] Further, the turbulence mechanism is two inclined turbulence baffles, which are arranged on the inner wall of the central liquid filling tube in opposite directions and staggered, so as to force the nitrogen-oxygen liquid mixture to change the flow direction, thereby promoting the mixing of the nitrogen-oxygen liquid mixture and the absorbent and achieving uniform distribution.

[0010] Further, the width of the baffle is 1 / 3-1 / 2 of the inner diameter of the central liquid filling tube, and the inclination angle is in the range of 30°-60°.

[0011] Further, the absorbent is stacked in a tubular shape around the central liquid filling tube and is uniformly distributed along the axial direction of the central liquid filling tube; the absorbent is a porous structure of flammable material, such as wood pulp, paper scraps, cotton, and other cellulose organic components.

[0012] Further, the ignition element is uniformly arranged in the absorbent, and the number is one or more; the energy release material of the ignition element is a metal resistance wire, which can release a high-voltage spark under the excitation of an external exciter to ignite the absorbent that has absorbed the nitrogen-oxygen liquid mixture; the foot wire of the ignition element is a lead wire, one end of which is connected with the ignition element, and the other end of which extends out of the energy storage tube and is connected with the external exciter; if there are multiple ignition elements, the lead wire is connected in series with the multiple ignition elements.

[0013] Further, one end of the exhaust pipe is arranged in the energy storage tube, and the other end is connected with the external atmosphere; during the liquid filling process of the nitrogen-oxygen liquid mixture, the nitrogen-oxygen mixed gas vaporized causes the internal pressure of the energy storage tube to rise, and the exhaust pipe is used to exhaust the excess gas to ensure that the internal and external pressures of the energy storage tube are balanced; the material of the exhaust pipe is plastic, and preferably, the exhaust pipe is a polyethylene pipe, a polyurethane pipe, a polyvinyl chloride pipe, or the like.

[0014] Advantages: Compared with the prior art, the advantages of the present application are:

[0015] (1) The present application provides a nitrogen-oxygen liquid mixture energy storage tube for breaking rocks, which is composed of a nitrogen-oxygen liquid mixture, an absorbent, an ignition element, a central liquid filling tube, an exhaust pipe, an outer membrane, a foot wire of the ignition element, and a pipe opening sealing element; after the absorbent in the energy storage tube fully absorbs the nitrogen-oxygen liquid mixture, when the ignition element releases a high-voltage spark, the local absorbent undergoes violent combustion under the combustion support of the liquid oxygen, and the flame combustion wave front propagates along the axial direction of the energy storage tube, so that the absorbent in other parts of the energy storage tube also rapidly participates in the combustion; the heat generated by this chemical reaction causes the remaining nitrogen-oxygen liquid mixture in the energy storage tube to reach or exceed the critical temperature required for vaporization, and the remaining nitrogen-oxygen liquid mixture in the energy storage tube rapidly vaporizes and expands to more than 700 times the original volume in a short time. Under the high-pressure load of the nitrogen-oxygen expanded gas, the rock medium is broken and damaged and undergoes a small amplitude throwing motion, and finally the purpose of breaking rocks is achieved.

[0016] (2) The nitrogen-oxygen liquid mixture is adopted, the addition of liquid nitrogen greatly reduces the sensitivity of liquid oxygen to open flame, electric spark, static electricity, impact, etc., the combustion-supporting property of liquid oxygen, the inertness of liquid nitrogen and the high expansion ratio of the nitrogen-oxygen liquid mixture can ensure good rock breaking effect and improve the construction safety of gas rock breaking, the nitrogen-oxygen mixed gas rock breaking technology not only solves the problems of high risk and large powder quantity of current explosive blasting, but also solves the problems of current liquid oxygen gas rock breaking insecurity, low efficiency and high cost of liquid carbon dioxide fracturing technology, etc.

[0017] (3) The drainage device is arranged in the center liquid filling pipe, the drainage device is a spiral flow guide piece or a flow disturbing mechanism, the nitrogen-oxygen liquid mixture is changed in direction and speed distribution through the simple structure, the mixing of the nitrogen-oxygen liquid mixture and the absorbent is promoted, and uniform distribution is achieved; the spiral flow guide piece forces the liquid mixture to form high-speed rotating spiral flow, breaks the laminar state of traditional linear injection, greatly increases the contact area of the nitrogen-oxygen mixture and the absorbent through centrifugal force and turbulent effect, and avoids local high concentration or stratification; the flow disturbing mechanism forms multiple impacts and flow splitting in the flow path, breaks large particle droplets or un-mixed clusters, and ensures that the liquid mixture is sprayed in a micron-level atomized state. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a structural schematic view of the energy storage pipe in the application;

[0019] Fig. 2 is a structural schematic view of the second liquid filling pipe;

[0020] Fig. 3 is a top view of the center liquid filling pipe;

[0021] Fig. 4 is a structural schematic view of the spiral flow guide piece;

[0022] Fig. 5 is a structural schematic view of the flow disturbing baffle. DETAILED DESCRIPTION

[0023] The technical solutions of the application will be described in detail below with reference to the drawings, but the protection scope of the application is not limited to the described embodiments. EMBODIMENT

[0024] As shown in the drawings, Figs. 1-3 a nitrogen-oxygen liquid mixture energy storage pipe for rock breaking is composed of a nitrogen-oxygen liquid mixture, an absorbent 1, a firing element 2, a center liquid filling pipe 3, an exhaust pipe, a flexible outer shell 4, a firing element foot wire 5 and a pipe opening sealing element 6.

[0025] The flexible shell 4 is provided with the absorbent 1, the ignition element 2, the exhaust pipe and the ignition element foot wire 5, the top of the flexible shell 4 is further provided with the pipe opening sealing element 6, the inside of the flexible shell 4 is vertically provided with the central liquid filling pipe 3, the central liquid filling pipe 3 comprises a first liquid filling pipe 301 and a second liquid filling pipe 302, the lower end of the first liquid filling pipe 301 reaches the bottom of the flexible shell 4, the upper end of the first liquid filling pipe 301 extends outside the flexible shell 4, the lower end of the second liquid filling pipe 302 communicates with the upper part of the first liquid filling pipe 301, the upper end of the second liquid filling pipe 302 extends outside the flexible shell 4, the side walls of the first liquid filling pipe 301 and the second liquid filling pipe 302 are uniformly distributed with a group of liquid leakage holes 7, the flow distribution optimizing shunt device 10 and the fluid flow optimizing drainage device are arranged between every adjacent two liquid leakage holes 7; the shunt device is located on the outer wall of the first liquid filling pipe 301, and the drainage device is located on the inner wall of the first liquid filling pipe 301; the shunt device comprises two branch pipes 1001 and 1002 which communicate with the first liquid filling pipe 301, the two branch pipes are symmetrically arranged, and the ends of the branch pipes away from the first liquid filling pipe 301 extend to the edge of the absorbent 2. The absorbent surrounds the central liquid filling pipe 3 and is stacked in a tubular shape, and the absorbent is a flammable material with a porous structure. The ignition element 2 is uniformly arranged in the absorbent, and in this embodiment, there are two ignition elements, and there is a wire, one end of the wire is connected with the two ignition elements in series, and the other end of the wire extends outside the energy storage pipe and is connected with an external exciter. One end of the exhaust pipe is arranged in the energy storage pipe, and the other end is connected with the external atmosphere.

[0026] In this embodiment, the drainage device is a spiral flow guide piece 8, the spiral flow guide piece 8 is a continuously twisted piece body, extends axially along the central liquid filling pipe, divides the flow channel, forms a bidirectional spiral channel, and the width of the spiral flow guide piece 8 is half of the diameter of the central liquid filling pipe 3; the liquid nitrogen and liquid oxygen mixed body is a uniform liquid mixed by liquid nitrogen and liquid oxygen at a ratio of 8:2, the absorbent is selected to be wood pulp paper, the energy releasing material of the ignition element is tungsten wire, the function is to ignite the wood pulp paper under the excitation of the exciter, the central liquid filling pipe is selected to be an aluminum pipe, the exhaust pipe is selected to be a polyethylene pipe, and the outer film is selected to be a polyvinyl chloride film. In use, the branch pipes are installed with the first liquid filling pipe, and then inserted into the energy storage pipe, since the absorbent is wood pulp paper, the wood pulp paper is slowly inserted into the energy storage pipe in a stacked structure. Embodiment

[0027] The difference between this embodiment and embodiment 1 is that the drainage device is a turbulence mechanism 9, the turbulence mechanism 9 is two inclined turbulence baffles, the baffles are inclined downward in opposite directions, and are staggered on the inner wall of the central liquid filling pipe 3, the width of the baffle is 1 / 2 of the inner diameter of the central liquid filling pipe 3, and the inclination angle is in the range of 30°.

[0028] While the application has been described and illustrated with reference to specific preferred embodiments, it is not intended that it be limited to these particulars. Various changes in form and detail can be made without departing from the spirit and scope of the application as defined by the appended claims.

Claims

1. A liquid mixture of nitrogen and oxygen energy storage tube for breaking rock, comprising a flexible shell (4), an absorbent (1), a firing element (2), an exhaust pipe and a firing element foot line (5) arranged in the flexible shell (4), and a tube mouth seal (6) arranged at the top of the flexible shell (4), characterized in that: The flexible shell (4) is vertically provided with a center liquid filling pipe (3) inside, the center liquid filling pipe (3) comprises a first liquid filling pipe (301) and a second liquid filling pipe (302), the lower end of the first liquid filling pipe (301) reaches the bottom of the flexible shell (4), the upper end of the first liquid filling pipe (301) extends outside the flexible shell (4), the lower end of the second liquid filling pipe (302) communicates with the upper part of the first liquid filling pipe (301), the upper end of the second liquid filling pipe (302) extends outside the flexible shell (4), the side wall of the first liquid filling pipe (301) and the second liquid filling pipe (302) is uniformly distributed with a group of liquid leakage holes (7), a shunt device for optimizing fluid distribution and a drainage device for optimizing fluid flow are arranged between every two adjacent liquid leakage holes (7); the shunt device is located on the outer wall of the first liquid filling pipe (301), and the drainage device is located on the inner wall of the first liquid filling pipe (301); the shunt device comprises two branch pipes in communication with the first liquid filling pipe (301), and the end of the branch pipe away from the first liquid filling pipe (301) extends to the edge of the absorbent.

2. The liquid mixture of nitrogen and oxygen energy storage tube for breaking rock according to claim 1, characterized in that: The drainage device is a spiral flow guide fin (8) or a spoiler mechanism (9).

3. A liquid mixture of nitrogen and oxygen energy storage tube for breaking rocks according to claim 2, characterized in that: The spiral flow guide fin (8) is a continuously twisted fin body, which extends axially and spirally along the center liquid filling pipe, divides the flow channel, and forms a bidirectional spiral channel.

4. The liquid mixture of nitrogen and oxygen energy storage tube for breaking rock according to claim 3, characterized in that: The width of the spiral flow guide fin (8) is half of the diameter of the center liquid filling pipe (3).

5. The liquid mixture of nitrogen and oxygen energy storage tube for breaking rock according to claim 2, characterized in that: The spoiler mechanism (9) is two inclined spoiler baffles, the baffles are inclined downward in opposite directions and are staggered on the inner wall of the center liquid filling pipe (3).

6. A liquid mixture of nitrogen and oxygen energy storage tube for breaking rocks according to claim 5, characterized in that: The width of the baffle is 1 / 3-1 / 2 of the inner diameter of the center liquid filling pipe (3), and the inclination angle ranges from 30° to 60°.

7. The liquid mixture of nitric oxide and nitrogen for a storage energy tube for breaking rocks according to claim 1, characterized by: The absorbent is stacked in a tubular shape around the center liquid filling pipe (3), and the absorbent is a porous structure of flammable material.

8. The liquid mixture of nitric oxide and nitrogen for a storage energy tube for breaking rocks according to claim 1, characterized in that: The ignition element (2) is uniformly arranged in the absorbent, and the number is one or more; the ignition element leg wire (5) is a lead wire, one end of the lead wire is connected with the ignition element, and the other end of the lead wire extends outside the energy storage pipe and is connected with an external exciter.

9. The liquid mixture of nitric oxide and nitrogen for a storage energy tube for breaking rocks according to claim 1, characterized in that: One end of the exhaust pipe is arranged in the energy storage pipe, and the other end is connected with the external atmosphere.

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