Top plate slotting equipment

Abstract

A pump station, a sand tank, a high-pressure hose and a sand blasting water blade are arranged, a water outlet and a water inlet are formed in the two sides of the pump station, the water inlet is connected with a static pressure water source through a pipeline, the water outlet is connected with the sand tank through the high-pressure hose, a sealing cover is fixed to the top of the sand tank, a base is arranged at the bottom of the sand tank, and a sand outlet is formed in the bottom of the sand tank. A valve is installed on the sand outlet to control sand flow, the high-pressure hose is connected with the water outlet, and the flow speed of sand is controlled through the valve. The drill rod is fixed to the top end of the hose and connected with the sand blasting water blade, the sand blasting water blade is provided with symmetrical sand blasting openings, during slotting, the pump station is pressurized, high-pressure water enters the sand blasting water blade through the drill rod, ultrahigh-pressure jet flow is formed at the sand blasting openings, rock hole walls are cut in the whole process, and then gravel in the sand adding tank is wrapped along with high-pressure water flow to enter the sand blasting water blade; the high-pressure water flow carries the gravel to form strong kinetic energy, the rock wall is subjected to penetration slotting, and the device is suitable for roof slotting operation and has efficient and stable operation performance.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine slotting equipment, in particular to roof slotting equipment. Background Art

[0002] The roof of the tunnel in the coal mine usually faces the challenge of unstable geological structure, and there will be cracks or fissures in the rock strata. Through cutting work, these cracks can be discovered and handled in time to prevent the occurrence of roof fall accidents. Roof fall refers to the collapse of the stratum or the roof of the tunnel, which poses a serious threat to miners and equipment. The cutting of the roof of the return air tunnel in the coal mine is to ensure the safety and stability of underground work, prevent geological disasters, improve traffic capacity, and improve the working environment. These measures help to protect the lives of miners and improve production efficiency. At present, ultra-high pressure hydraulic cutting and pressing integrated technology is used to relieve the pressure on the roof to control the change of the tunnel. However, ultra-high pressure hydraulic cutting of the roof requires the use of ultra-high pressure. The problems brought by ultra-high pressure include low overall reliability of the equipment and easy damage of accessories, resulting in frequent maintenance of the equipment. The cutting and pressing integrated technology breaks the continuity of the process because the equipment cannot run continuously, which pushes up the process cost and reduces the effectiveness. In addition, the use of ultra-high pressure equipment also has great safety hazards. Utility Model Content

[0003] The purpose of the utility model is to provide a roof cutting device to solve the problems that ultra-high pressure is required for ultra-high pressure hydraulic cutting of the roof, the overall reliability of the equipment is low and the accessories are easy to wear, resulting in frequent maintenance of the equipment, and the integrated cutting and pressing technology cannot run continuously, which breaks the continuity of the process, increases the process cost, reduces the effectiveness, and poses a major safety hazard.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a roof cutting equipment, including a pump station, a sand tank, a high-pressure hose and a sandblasting water blade, the pump station is provided with a water outlet and a water inlet on the left and right sides, the water inlet is connected to the static pressure water source through a pipeline, the water outlet is connected to the sand tank through a high-pressure hose, the top of the sand tank is fixedly connected to a cover, the bottom of the sand tank is fixedly connected to a base, a sand outlet is provided in the middle of the bottom end of the sand tank, a valve is fixedly connected to the sand outlet, the sand outlet is connected to the high-pressure hose and controlled by the valve, a drill rod is fixedly connected to the top of the high-pressure hose, a sandblasting water blade is connected to the top of the drill rod, and sandblasting outlets are symmetrically provided on the left and right sides of the sandblasting water blade.

[0005] Preferably, the high-pressure hose is connected to the water outlet by an A-type crimp connection, the pump station is connected to the water inlet by a quick connection, and the connection is sealed by an "O" ring.

[0006] Preferably, a pressure relief valve and a pressure gauge are fixedly connected to the sealing cover to control the pressure in the sand tank and the flow rate of the sand.

[0007] Preferably, a pressure gauge and a pressure valve are fixedly connected to the pump station for monitoring the output pressure of the pump station and controlling the output pressure.

[0008] Preferably, the water outlet and the water inlet are coaxially arranged to simplify the pipeline layout, reduce turbulence and pressure drop, and improve the stability and efficiency of fluid flow.

[0009] Preferably, the drill rod is a through pipe for conveying liquid to the sandblasting water blade.

[0010] Preferably, the sand outlet is arranged perpendicular to the sand tank.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] By setting up a pump station, a sand tank and a sandblasting water blade, the pump station is pressurized, and high-pressure water enters the sandblasting water blade through the drill pipe, forming an ultra-high-pressure jet at the sandblasting port to cut the rock hole wall throughout the process. Then the sand and gravel in the sand tank are carried into the sandblasting water blade along with the high-pressure water flow. The high-pressure water flow carries the sand and gravel to form a strong kinetic energy, which penetrates and cuts the rock wall, thereby achieving a better cutting effect under a relatively low pump station pressure. At the same time, this design improves the reliability of the equipment, ensures the equipment's ability to continuously cut and fractur, reduces the maintenance frequency and time, and ensures the integrated continuity of cutting and fracturing. In addition, the control of the change in tunnel displacement is also good, and the micro-seismic energy level decreases, indicating that the pressure relief effect is significant. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall front structure of the utility model.

[0014] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 3 It is a schematic diagram of the structure of the drill rod and the sandblasting water blade cooperating with each other in the utility model.

[0016] In the figure: 1. Pump station; 201. Water outlet; 202. Water inlet; 203. Sand tank; 204. Base; 205. Sand outlet; 206. High-pressure hose; 207. Valve; 208. Drill rod; 209. Sandblasting water blade; 210. Sandblasting port; 211. Cover; 3. Pressure relief valve; 4. Pressure gauge; 5. Press valve. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] Example 1: Please refer to Figure 1-3, an embodiment provided by the utility model: a roof cutting device, including a pump station 1, a sand tank 203, a high-pressure hose 206 and a sandblasting water blade 209, a water outlet 201 and a water inlet 202 are opened on the left and right sides of the pump station 1, and a pressure gauge 4 and a press valve 5 are fixedly connected to the pump station 1 to monitor the pressure output by the pump station 1 and control the output pressure. The pressure gauge 4 can monitor the pressure output of the pump station 1 in real time to prevent damage to the equipment or unstable operation caused by excessive pressure. The press valve 5 can be used to manually adjust the output pressure of the pump station 1. When the system pressure needs to be adjusted, the operator can control the output pressure of the pump station 1 by pressing the valve 5 to meet the needs under different working conditions. The pump station 1 provides pressure to pressurize the liquid and transport it to the sandblasting water The water inlet 202 is connected to the static water source through a pipeline. The static water of the mine is supplied to the underground only by the natural pressure difference, which is called the static water of the mine. The water outlet 201 is connected to the sand tank 203 through a high-pressure hose 206. The sand tank 203 stores sand materials for mixing in the high-pressure water flow and increasing kinetic energy to improve the cutting or cleaning effect. The top of the sand tank 203 is fixedly connected with a cover 211. The cover 211 can effectively protect the inside of the sand tank 203 from pollution from the external environment, the invasion of impurities or other substances, which helps to keep the inside of the sand tank 203 clean and ensure that the stored substances are not contaminated or damaged. At the same time, opening the cover 211 can replenish the sand inside. The bottom of the sand tank 203 is fixedly connected with a base 204, and the base 204 provides the sand tank 203 with a certain amount of sand. To provide stable support, a sand outlet 205 is provided in the middle of the bottom end of the sand tank 203, and a valve 207 is fixedly connected to the sand outlet 205. The sand outlet 205 is connected to a high-pressure hose 206 and controlled by the valve 207. The valve 207 controls the flow rate of the sand material, opens or closes the sand material channel to control the flow rate of the mixture, and a drill rod 208 is fixedly connected to the top of the high-pressure hose 206. A sandblasting water blade 209 is connected to the top of the drill rod 208. Sandblasting ports 210 are symmetrically provided on the left and right sides of the sandblasting water blade 209. The sandblasting water blade 209 uses the kinetic energy generated by the mixture of high-pressure water flow and sand to cut the target surface. The high-pressure hose 206 and the water outlet 201 are A-type press-fit connection, which enables it to be quickly disassembled and connected, saving time and improving work efficiency. , reducing the maintenance frequency and time. The connection between the pump station 1 and the water inlet 202 is a quick connection method. The "O" ring seal at the connection prevents liquid leakage and provides a reliable sealing effect. It is corrosion-resistant and high-temperature resistant, ensuring the safe operation of the system and reducing the risk of leakage. The cover 211 is fixedly connected with a pressure relief valve 3 and a pressure gauge 4 to control the pressure in the sand tank 203 and the sand flow rate. The pressure relief valve 3 releases excess pressure when the system reaches the set pressure to prevent the system from being overloaded or damaged. At the same time, the pressure gauge 4 monitors the pressure level of the body in the system in real time and provides real-time pressure information. The water outlet 201 and the water inlet 202 are coaxially arranged to simplify the pipeline layout, reduce turbulence and pressure drop, and improve the stability and efficiency of fluid flow.The drill pipe 208 is a through pipe used to transfer liquid to the sandblasting water blade 209. The outside of the drill pipe 208 is made of metal, such as steel or alloy steel, which can withstand high pressure and friction while providing sufficient strength and rigidity. The sand outlet 205 is set vertically to the sand tank 203. Setting the sand outlet 205 vertically to the sand tank 203 allows the sand to be discharged smoothly by natural gravity. The sand can be discharged from the sand tank 203 more smoothly without being blocked by pipes or other obstacles. The design of the vertical sand outlet 205 can reduce the risk of sand being blocked during the discharge process. Compared with the horizontal outlet, the natural gravity sand discharge method of the vertical sand outlet 205 is less susceptible to sand blockage, thereby reducing the need for maintenance and cleaning. The vertical sand outlet 205 can simplify the pipeline layout, reduce the bends and connections of the pipeline, thereby reducing the complexity of the system, which helps to improve the reliability and stability of the system.

[0019] First, the water inlet 202 is connected to the static water source, the pump station 1 is pressurized, and the water is transmitted to the high-pressure hose 206 through the water outlet 201. Then the sand tank 203 is opened through the valve 207, and the sand flows out through the sand outlet 205 and mixes with the water flow. The high-pressure water enters the sandblasting water blade 209 through the drill pipe 208, and then the sandblasting port 210 is sprayed out, forming an ultra-high-pressure jet at the sandblasting port to cut the rock hole wall throughout the process. Then, the sand and gravel in the sand tank 203 are entrained into the sandblasting water blade along with the high-pressure water flow. The high-pressure water flow carries the sand and gravel to form a strong kinetic energy, which penetrates and cuts the rock wall, thereby 1 pressure to achieve better cutting effect, each group of drilling cutting 62m, each meter cutting 30min, after cutting completion, fracturing 4h, each group of drilling takes 35h; hydraulic sandblasting cutting is to carry the gravel in the sand adding tank 203 into the sandblasting water blade with the high-pressure water flow, and the high-pressure water flow carries the gravel to form a strong kinetic energy to penetrate the rock wall to cut, so as to achieve better cutting effect under the relatively low pressure of pump station 1, using 2+1 cutting and staged fracturing, each group of drilling cutting 22 times, each time 20min, fracturing 22 times, each time 30min, each group of drilling takes 18.33h.

[0020] The above is only an embodiment of the utility model, and the common sense such as the known specific structure and characteristics in the scheme is not described too much here. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A roof cutting device, comprising a pump station (1), a sand tank (203), a high-pressure hose (206) and a sandblasting water blade (209), characterized in that: The pump station (1) is provided with a water outlet (201) and a water inlet (202) on the left and right sides respectively. The water inlet (202) is connected to a static pressure water source through a pipeline. The water outlet (201) is connected to a sand tank (203) through a high-pressure hose (206). A sealing cover (211) is fixedly connected to the top of the sand tank (203). A base (204) is fixedly connected to the bottom of the sand tank (203). A sand outlet (205) is provided in the middle of the bottom end of the sand tank (203). A valve (207) is fixedly connected to the sand outlet (205). The sand outlet (205) is connected to the high-pressure hose (206) and is controlled by the valve (207). A drill rod (208) is fixedly connected to the top of the high-pressure hose (206). A sandblasting water blade (209) is connected to the top of the drill rod (208). Sandblasting ports (210) are symmetrically provided on the left and right sides of the sandblasting water blade (209).

2. The roof slotting device according to claim 1, characterized in that: The high-pressure hose (206) and the water outlet (201) are connected in an A-type crimping manner, and the connection between the pump station (1) and the water inlet (202) is a quick connection method, with an "O" ring seal at the connection.

3. The roof cutting device according to claim 1, characterized in that: The sealing cover (211) is fixedly connected to a pressure relief valve (3) and a pressure gauge (4) for controlling the pressure in the sand tank (203) and controlling the flow rate of the sand.

4. The roof slotting device according to claim 1, characterized in that: The pump station (1) is fixedly connected with a pressure gauge (4) and a pressure valve (5) for monitoring the pressure output by the pump station (1) and controlling the output pressure.

5. The roof cutting device according to claim 1, characterized in that: The water outlet (201) and the water inlet (202) are coaxially arranged to simplify pipeline layout, reduce turbulence and pressure drop, and improve the stability and efficiency of fluid flow.

6. The roof cutting device according to claim 1, characterized in that: The drill rod (208) is a through pipe used to transmit liquid to the sandblasting water blade (209).

7. The roof slotting device according to claim 1, characterized in that: The sand outlet (205) is arranged perpendicular to the sand tank (203).

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