Gas rock cracking device filled in drill hole at low pressure

Abstract

The utility model discloses a gas rock cracking device for low-pressure filling in a drill hole, and relates to the technical field of CO2 blasting devices, the gas rock cracking device comprises a carbon dioxide filling mechanism, the carbon dioxide filling mechanism is connected with a nitrogen dioxide cracking pipe through a filling pipeline, a gas outlet is formed in one side of the carbon dioxide filling mechanism, and a gas outlet is formed in the other side of the carbon dioxide filling mechanism. The air outlet is connected with one end of an inflation pipeline, a quick connector is arranged at the end, away from the air outlet, of the inflation pipeline, a movable limiting block is arranged in the quick connector, and a spring is arranged on one side of the limiting block. The driver can drive the sliding sleeve to move so as to drive the limiting block to extrude inwards, the limiting block can be in contact with the liquid injection opening, so that the quick connector and the liquid injection opening are relatively stably connected, in addition, after the sliding sleeve is reversely driven and the limiting block is not extruded by the sliding sleeve any more, the limiting block can be far away from the liquid injection opening under the action of the spring, and the liquid injection opening is stably connected. Therefore, the quick connector and the liquid injection port can be conveniently separated.

Description

Technical Field

[0001] This utility model relates to the technical field of CO2 blasting devices, specifically a gas rock fracturing device filled with low pressure inside a borehole. Background Technology

[0002] CO2 rock fracturing devices are widely used in rock mining in various mines, quarries, water conservancy projects, railways, highways and various municipal engineering projects due to their advantages such as low temperature, flame retardancy, environmental protection and high efficiency, replacing industrial explosives in construction operations.

[0003] The development of CO2 blasting products has led to three main product series: reusable storage tubes, externally filled disposable storage tubes, and internally filled disposable storage tubes. However, reusable storage tube blasting has common problems: low installation efficiency, high labor intensity, high recycling costs, and some storage tubes even become unusable due to excessive deformation and breakage caused by rock fissures. In contrast, disposable CO2 blasters are increasingly becoming the first choice for CO2 blaster users because they are simpler and more convenient to operate, do not require recycling, require less investment, and offer quick returns.

[0004] A disposable CO2 rock fracturing device with low-pressure filling in borehole was proposed in Chinese patent publication number CN113375509A. After studying the prior art and the above-mentioned patent, it was found that the disassembly and assembly efficiency of the gas filling pipe and nitrogen dioxide fracturing pipe of the existing device is not high. Therefore, this utility model proposes a gas rock fracturing device with low-pressure filling in borehole. Utility Model Content

[0005] Technical problems to be solved

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a gas rock fracturing device that is filled with low pressure inside the borehole.

[0007] Technical solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a gas rock fracturing device for low-pressure filling in boreholes, comprising a carbon dioxide filling mechanism, wherein the carbon dioxide filling mechanism is connected to a nitrogen dioxide fracturing tube through a filling pipe, and an outlet is provided on one side of the carbon dioxide filling mechanism, wherein the outlet is connected to one end of the filling pipe.

[0009] A quick connector is provided at the end of the inflation pipe away from the air outlet. A movable limiting block is installed inside the quick connector, and a spring is provided on one side of the limiting block. A sliding sleeve is also fitted onto the outside of the quick connector, and a driver is connected to one end of the sliding sleeve. The driver is fixedly installed on the quick connector. By providing a quick connector at one end of the inflation pipe and installing the limiting block, spring, sliding sleeve, and driver inside the quick connector, the driver can drive the sliding sleeve to move during use, thereby causing the limiting block to press inward. The limiting block can contact the injection port, allowing a relatively stable connection between the quick connector and the injection port. Furthermore, after the sliding sleeve reverses its movement and the limiting block is no longer pressed by the sliding sleeve, the limiting block can move away from the injection port under the action of the spring, allowing the quick connector and the injection port to easily detach. This structure allows the inflation pipe to easily and quickly detach from the nitrogen dioxide fracturing tube after inflation, achieving efficient construction.

[0010] Preferably, one end of the nitrogen dioxide fracturing tube is provided with an injection port, the quick connector is sleeved on the injection port, and a limiting groove is also provided on the outside of the injection port.

[0011] Preferably, a movable spherical piston is provided inside the injection port, and a spring is installed at the bottom of the spherical piston.

[0012] Preferably, the nitrogen dioxide fracturing tube is further provided with a liquid storage chamber inside.

[0013] Preferably, the nitrogen dioxide fracturing tube is further provided with a heater to provide heat for liquid CO2, and the heater is provided with an ignition head to provide heat for detonation.

[0014] Preferably, a pressure control valve is also provided at the top of the nitrogen dioxide cracking tube.

[0015] Preferably, the air outlet is provided with a connecting thread, and the end of the inflation pipe away from the air outlet is threaded to the outside of the air outlet.

[0016] Beneficial effects:

[0017] Compared with existing technologies, this borehole-filled low-pressure gas rock fracturing device has the following advantages:

[0018] This invention features a quick-connect fitting at one end of the inflation pipe, with a limiting block, spring, sliding sleeve, and driver inside the quick-connect fitting. During use, the driver moves the sliding sleeve, causing the limiting block to press inwards. The limiting block contacts the injection port, ensuring a relatively stable connection between the quick-connect fitting and the injection port. Furthermore, after the sliding sleeve reverses its movement and the limiting block is no longer pressed by the sliding sleeve, it moves away from the injection port under the action of the spring, allowing for easy disengagement between the quick-connect fitting and the injection port. This structure allows for convenient and rapid disengagement of the nitrogen dioxide fracturing tube after inflation, achieving efficient construction. Attached Figure Description

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 This is a schematic diagram of the quick connector and liquid injection port of this utility model;

[0022] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A;

[0023] Figure 4 This is a structural schematic diagram of another state of the present invention.

[0024] In the picture:

[0025] 1. Carbon dioxide filling mechanism; 2. Filling pipe; 3. Nitrogen dioxide cracking tube; 101. Gas outlet; 201. Quick connector; 202. Limiting block; 203. Spring; 204. Sliding sleeve; 205. Driver; 301. Liquid injection port; 302. Limiting groove; 303. Ball piston; 304. Spring II; 305. Liquid storage chamber; 306. Heater; 307. Ignition head; 308. Pressure control valve. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-4 As shown, this utility model provides a technical solution: a gas rock fracturing device filled with low pressure in a borehole, including a carbon dioxide filling mechanism 1, which is a liquid CO2 Dewar canister. The carbon dioxide filling mechanism 1 is connected to a nitrogen dioxide fracturing tube 3 through a filling pipe 2. An outlet 101 is provided on one side of the carbon dioxide filling mechanism 1, and the outlet 101 is connected to one end of the filling pipe 2.

[0028] In this application, a quick connector 201 is provided at one end of the inflation pipe 2 away from the air outlet 101. A movable limiting block 202 is provided inside the quick connector 201, and a spring 203 is provided on one side of the limiting block 202. A sliding sleeve 204 is also fitted onto the outside of the quick connector 201. One end of the sliding sleeve 204 is connected to a driver 205, which is fixedly mounted on the quick connector 201. The driver 205 is an electric telescopic rod, and a battery is connected to power the driver 205. The driver 205 is also connected to a wireless signal receiver, which receives signals transmitted from a control terminal to control the normal operation of the driver 205. The control terminal can be used to control the extension and retraction of the driver 205. By providing a quick connector 201 at one end of the inflation pipe 2 and a quick connector 203 at one end of the air outlet 101, the quick connector 201 can effectively control the extension and retraction of the driver 205. The quick connector 201 is internally equipped with a limiting block 202, a spring 203, a sliding sleeve 204, and a driver 205. During use, the driver 205 drives the sliding sleeve 204 to move, which in turn causes the limiting block 202 to press inward. The limiting block 202 can then contact the injection port 301, making the quick connector 201 and the injection port 301 relatively stable. In addition, after the sliding sleeve 204 reverses its movement, the limiting block 202 is no longer pressed by the sliding sleeve 204, and under the action of the spring 203, the limiting block 202 can move away from the injection port 301, making it easy for the quick connector 201 and the injection port 301 to detach. The above structure allows the inflation pipe 2 to easily and quickly detach from the nitrogen dioxide fracturing tube 3 after inflation, achieving the goal of efficient construction.

[0029] Please refer to the following carefully. Figure 2 , Figure 3 and Figure 4One end of the nitrogen dioxide fracturing tube 3 is provided with an injection port 301. A quick connector 201 is sleeved on the injection port 301. A limiting groove 302 is also provided on the outside of the injection port 301. A movable ball piston 303 is provided inside the injection port 301. A spring 304 is installed at the bottom of the ball piston 303.

[0030] Please refer to the following carefully. Figure 1 The nitrogen dioxide fracturing tube 3 is also equipped with a liquid storage chamber 305, a heater 306 that provides heat to the liquid CO2, an ignition head 307 that provides heat for detonation, and a pressure control valve 308 at the top of the nitrogen dioxide fracturing tube 3.

[0031] In addition, the air outlet 101 in this application is provided with connecting threads on the outside, and the end of the inflation pipe 2 away from the air outlet 101 is threaded to the outside of the air outlet 101.

[0032] Working principle: When the quick connector 201 is connected to the injection port 301, the driver 205 can drive the sliding sleeve 204 to move, which in turn drives the limiting block 202 to press inward. The limiting block 202 can contact the injection port 301, so that the quick connector 201 and the injection port 301 are relatively stably connected. When the quick connector 201 and the injection port 301 are separated, after the sliding sleeve 204 is driven in the opposite direction, the limiting block 202 is no longer pressed by the sliding sleeve 204. Under the action of the spring 203, the limiting block 202 can move away from the injection port 301, so that the quick connector 201 and the injection port 301 can be easily separated.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A borehole-filled low-pressure gas rock fracturing device, comprising a carbon dioxide filling mechanism (1), wherein the carbon dioxide filling mechanism (1) is connected to a nitrogen dioxide fracturing tube (3) via a filling pipe (2), characterized in that: The carbon dioxide inflation mechanism (1) has an air outlet (101) on one side, and the air outlet (101) is connected to one end of the inflation pipe (2). The inflation pipe (2) is provided with a quick connector (201) at one end away from the air outlet (101). The quick connector (201) is provided with a movable limiting block (202) inside. A spring (203) is provided on one side of the limiting block (202). A sliding sleeve (204) is also sleeved on the outside of the quick connector (201). One end of the sliding sleeve (204) is connected to a driver (205). The driver (205) is fixedly installed on the quick connector (201).

2. The borehole low-pressure gas-filled rock fracturing device according to claim 1, characterized in that: One end of the nitrogen dioxide fracturing tube (3) is provided with an injection port (301), the quick connector (201) is sleeved on the injection port (301), and a limiting groove (302) is also provided on the outside of the injection port (301).

3. The borehole low-pressure gas-filled rock fracturing device according to claim 2, characterized in that: The injection port (301) is equipped with a movable spherical piston (303), and a spring (304) is installed at the bottom of the spherical piston (303).

4. The borehole low-pressure gas rock fracturing device according to claim 1, characterized in that: The nitrogen dioxide cracking tube (3) is also provided with a liquid storage chamber (305).

5. A borehole-filled low-pressure gas rock fracturing device according to claim 1, characterized in that: Furthermore, the nitrogen dioxide cracking tube (3) is also equipped with a heater (306) that provides heat to liquid CO2, and the heater (306) is equipped with an ignition head (307) that provides heat for detonation.

6. The borehole low-pressure gas rock fracturing device according to claim 1, characterized in that: A pressure control valve (308) is also provided at the top of the nitrogen dioxide cracking tube (3).

7. A borehole-filled low-pressure gas rock fracturing device according to claim 1, characterized in that: The air outlet (101) is provided with a connecting thread on the outside, and the end of the air inlet pipe (2) away from the air outlet (101) is threaded to the outside of the air outlet (101).

Images