CN216588708U - Hydraulic top cutting device - Google Patents
Hydraulic top cutting device Download PDFInfo
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- CN216588708U CN216588708U CN202122880767.6U CN202122880767U CN216588708U CN 216588708 U CN216588708 U CN 216588708U CN 202122880767 U CN202122880767 U CN 202122880767U CN 216588708 U CN216588708 U CN 216588708U
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Abstract
The utility model provides a hydraulic top cutting device which comprises a drilling machine, a high-pressure pump station, a sealing drill rod, an upper plug hole sealing device, a lower plug hole sealing device and a sand adding tank, wherein the sealing drill rod is installed on the drilling machine, the tail part of the sealing drill rod is provided with a water tail, the head part of the sealing drill rod is sequentially connected with the lower plug hole sealing device and the upper plug hole sealing device, the lower part of the upper plug hole sealing device is provided with a water through hole, the high-pressure pump station comprises a crankshaft pump, a water tank, a pressure regulating valve block and a pressure stabilizing valve block, the crankshaft pump is connected with a motor shaft, the water tank is provided with a water outlet and two water return ports, the two water return ports are respectively connected with the pressure regulating valve block and the pressure stabilizing valve block, the water outlet is connected with the crankshaft pump, the water outlet end of the crankshaft pump is sequentially connected with the pressure regulating valve block and the pressure stabilizing valve block, the sand adding tank comprises a tank body and a base, the top of the tank body is provided with a pressure gauge, the bottom is provided with a sand outlet, and the water outlet end of the pressure stabilizing valve block, the sand adding tank is connected with the sand outlet of the sand adding tank through a tee joint. The hydraulic topping device has the advantages of long pressure maintaining time, short fracturing time and high safety.
Description
Technical Field
The utility model belongs to the technical field of coal mine safety mining, and particularly relates to a hydraulic roof cutting device.
Background
The gob-side entry retaining technology is to support the crossheading of the previous working face again by constructing a filling body or an isolation body in order to recover protective coal pillars retained in the traditional coal mining mode, and continue to serve the mining of the next working face. The technology solves the problem of stress concentration of the top and bottom plates of the coal pillar during roadway protection of the coal pillar, and realizes pressure relief continuous mining of a main mining coal bed; meanwhile, Y-shaped ventilation is adopted to avoid gas accumulation at the upper corner, so that the technology is widely popularized in China in recent years.
With the gradual deep shift of coal mining in China, the surrounding rock pressure of underground mining places is increasingly high. Under the action of surrounding rock pressure, the working face top plate periodically strides and falls, but the top plates above the crossheading at the two sides of the working face form a long-distance suspended ceiling due to the existence of manual supporting. The suspended ceiling not only affects the ventilation of the roadway, but also can generate strong shock waves if the suspended ceiling suddenly collapses, and if the suspended ceiling is light, the normal operation of equipment is affected, and if the suspended ceiling is heavy, the safety of personnel is harmed. Thus, maintenance of gob-side entry retaining is critical.
The lateral cantilever structure above the goaf is cut off in a blasting roof cutting and hydraulic fracturing roof cutting mode generally, and the roadway confining pressure stress is reduced. When blasting and top cutting, the blasting energy is large, and secondary coal and impact mine pressure are easy to generate. The hydraulic fracturing top-cutting pressure relief mode utilizes industrial water, is energy-saving and environment-friendly, has good controllability and is widely applied in recent years. Traditional hydraulic fracturing injects water fracturing into a temporarily sealed drill hole through a high-pressure water pipe, and has the defects of long fracturing time, short pressure maintaining time and low safety.
Disclosure of Invention
The utility model aims to provide a hydraulic topping device which is long in pressure maintaining time, short in fracturing time and high in safety.
The utility model provides a hydraulic top cutting device, which comprises a drilling machine, a high-pressure pump station, a sealing drill rod, an upper plug hole sealing device, a lower plug hole sealing device and a sand adding tank, wherein the sealing drill rod is arranged on the drilling machine, the tail part of the sealing drill rod is provided with a water tail, the head part of the sealing drill rod is sequentially connected with the lower plug hole sealing device and the upper plug hole sealing device, the lower part of the upper plug hole sealing device is provided with a water through hole and is positioned between the upper plug hole sealing device and the lower plug hole sealing device, the high-pressure pump station comprises a crankshaft pump, a motor, a water tank, a pressure regulating valve block and a pressure stabilizing valve block, the crankshaft pump is connected with the motor shaft, the water tank is provided with a water outlet and two water return ports, the two water return ports are respectively connected with the pressure regulating valve block and the pressure stabilizing valve block, the water outlet is connected with the crankshaft pump, the pressure regulating valve block is provided with a pressure regulating valve and is positioned on the water inlet side of the pressure regulating valve block and is used for setting the highest output water pressure of the high-pressure pump station, the sand feeding device is characterized in that a pressure stabilizing valve is arranged on the pressure stabilizing valve block, the sand feeding tank comprises a tank body and a base, the tank body is arranged above the base, the tank body is communicated with the inside, the top of the tank body is provided with a pressure gauge, the bottom of the tank body is provided with a sand outlet, the sand outlet is provided with a stop valve, and the water outlet end of the pressure stabilizing valve block, the sand feeding tank sand outlet and the water tail of the sealing drill rod are connected through a tee joint.
Further, high-pressure power unit still includes operation panel and track, high-pressure power unit passes through the track walking, the operation panel is used for controlling track walking direction.
Furthermore, a pressure gauge is arranged on the pressure stabilizing valve block.
Furthermore, the sealing drill rod is also provided with an orifice hole packer for plugging a drilling hole.
The utility model has the following beneficial effects: (1) the top cutting device limits the highest output pressure of the high-pressure pump station by arranging the pressure stabilizing valve block, avoids accidents caused by sudden overlarge pressure and has good safety; meanwhile, the pressure regulating valve block is arranged, so that the pressure is kept at a set value for a long time, the pressure maintaining performance is good, and the fracturing time is shortened. (2) The utility model takes the drill rod as a water-through carrier, and is clamped firmly by a drilling machine, thereby improving the safety of the drilling machine, forming a sealing space by utilizing the upper and lower plug hole sealers, dynamically maintaining pressure and improving the fracturing effect.
Drawings
FIG. 1 is an overall schematic view of a hydraulic cutting apparatus according to the present invention.
FIG. 2 is a schematic diagram of the high-pressure pumping station of the utility model.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the following explains the present solution by way of specific embodiments and with reference to the accompanying drawings.
As shown in figures 1 and 2, the hydraulic top cutting device comprises a drilling machine 7, a high-pressure pump station 1, a sealing drill rod 3, an upper plug hole packer 4, a lower plug hole packer 5 and a sand adding tank 2.
The sealing drill rod 3 is arranged on a drilling machine 7, the tail part of the sealing drill rod 3 is provided with a water tail, the head part of the sealing drill rod is sequentially connected with a lower plug hole packer 5 and an upper plug hole packer 4, the lower part of the upper plug hole packer 4 is provided with a water through hole 6 which is positioned between the upper plug hole packer and the lower plug hole packer and is used for outputting high-pressure sand-carrying water to carry out hydraulic top cutting.
The high-pressure pump station comprises a crankshaft pump 13, a motor 11, a water tank 17, a pressure regulating valve block 15 and a pressure stabilizing valve block 16. The crankshaft pump 13 is connected with the motor 11 shaft, the water tank 17 is provided with a water outlet 20 and two water return ports 12, the two water return ports 12 are respectively connected with the pressure regulating valve block 15 and the pressure stabilizing valve block 16, and when the water pressure is overlarge, water flows back to the water tank 17 through the water return ports 12, so that the waste of water resources is avoided. The water outlet 20 of the water tank is connected with the crankshaft pump 13, the water outlet end of the crankshaft pump 13 is sequentially connected with a pressure regulating valve block 15 and a pressure stabilizing valve block 16, a pressure regulating valve is arranged on the pressure regulating valve block 15 and located on the water inlet side of the pressure regulating valve block 15 and used for setting the highest output water pressure of the high-pressure pump station, and a pressure stabilizing valve is arranged on the pressure stabilizing valve block and used for maintaining the pressure and stabilizing the water pressure at a designed value for a long time.
The sand adding tank 2 comprises a tank body and a base, and the tank body is arranged above the base to prevent toppling. The jar body well leads to, and the top sets up the manometer for measure jar internal pressure, and the bottom sets up the sand outlet, and the sand outlet sets up the stop valve, is used for the switching and adjusts the volume of adding sand. The water outlet end of the pressure stabilizing valve block 16, the sand outlet of the sand adding tank 2 and the water tail of the sealing drill rod 3 are connected through a tee joint.
Further, the high-pressure pump station also comprises an operation platform 14 and a crawler belt 19, the high-pressure pump station walks through the crawler belt 19, and the operation platform 14 is used for controlling the walking direction of the crawler belt. In order to save space and facilitate the movement of the high-pressure pump station 1 in the roadway, an oil tank 18 and a water tank 17 for supplying oil to the motor are placed in an L shape.
Further, a pressure gauge is arranged on the pressure stabilizing valve block 16.
Further, the sealing drill rod 3 is also provided with an orifice hole packer 8 for plugging a drilling hole.
The working process is as follows: the roof is first drilled over the gob to a depth that reaches or exceeds the depth of the substantially hard top strata. And after drilling is finished, withdrawing the drill rod. And (2) connecting an upper plug hole packer 4 and a lower plug hole packer 5 by adopting a retreating type fracturing method, pushing the upper plug hole packer 4 and the lower plug hole packer 4 to a preset position of a fractured rock body through a sealing drill rod 3, and temporarily sealing a drilling hole by using an orifice hole packer 8. And (3) clamping and fixing the sealed drill rod 3 through a drilling machine 7, sequentially connecting the sand adding tank 2 and the high-pressure pump station 1, and starting water injection and fracturing.
Firstly, setting a pressure value of a pressure stabilizing valve 16 according to the pressure resistance value of the roof rock stratum, limiting the highest output pressure of the high-pressure pump station 1, then adjusting a pressure regulating valve 15, and carrying out dynamic pressure maintaining to keep the pressure at a set value. Carry the high pressure through pump station 1 and carry sand water, go up stopper hole packer 4, lower stopper hole packer 5 in the pressurization, make its inflation, go up simultaneously stopper hole packer 4 below through hole 6 play water, when the extreme strength of rising to the stratum gradually of play water pressure, the pore wall fracture, after the fracturing is accomplished, will seal drilling rod 3 and withdraw from, to next fracturing position, repeat above-mentioned process.
While the utility model has been described in connection with a preferred embodiment, it is not intended to limit the utility model, and various changes, substitutions and alterations of equivalents to the subject matter recited herein may be made by those skilled in the art without departing from the spirit and scope of the utility model, which is to be construed as limited only by the claims appended hereto.
Claims (4)
1. A hydraulic top cutting device is characterized by comprising a drilling machine, a high-pressure pump station, a sealing drill rod, an upper plug hole sealing device, a lower plug hole sealing device and a sand adding tank,
the sealing drill rod is arranged on the drilling machine, the tail part of the sealing drill rod is provided with a water tail, the head part of the sealing drill rod is sequentially connected with the lower plug hole packer and the upper plug hole packer, the lower part of the upper plug hole packer is provided with a water through hole which is positioned between the upper plug hole packer and the lower plug hole packer,
the high-pressure pump station comprises a crankshaft pump, a motor, a water tank, a pressure regulating valve block and a pressure stabilizing valve block, wherein the crankshaft pump is connected with the motor shaft, the water tank is provided with a water outlet and two water return ports, the two water return ports are respectively connected with the pressure regulating valve block and the pressure stabilizing valve block, the water outlet is connected with the crankshaft pump, the water outlet end of the crankshaft pump is sequentially connected with the pressure regulating valve block and the pressure stabilizing valve block, the pressure regulating valve block is provided with a pressure regulating valve which is positioned at the water inlet side of the pressure regulating valve block and used for setting the highest output water pressure of the high-pressure pump station, and the pressure stabilizing valve block is provided with a pressure stabilizing valve,
the sand adding tank comprises a tank body and a base, the tank body is arranged above the base, the tank body is communicated with the inside, the top of the tank body is provided with a pressure gauge, the bottom of the tank body is provided with a sand outlet, the sand outlet is provided with a stop valve, and the water outlet end of the pressure stabilizing valve block, the sand outlet of the sand adding tank and the water tail of the sealing drill rod are connected through a tee joint.
2. The hydraulic topping device of claim 1 wherein the high pressure pumping station further comprises an operation table and a crawler, the high pressure pumping station travels through the crawler, and the operation table is used for controlling the traveling direction of the crawler.
3. The hydraulic topping device of claim 1 wherein a pressure gauge is provided on the pressure-stabilizing valve block.
4. The hydraulic topping device of claim 1 wherein the sealing drill rod is further provided with an orifice packer for plugging a drilling orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122880767.6U CN216588708U (en) | 2021-11-23 | 2021-11-23 | Hydraulic top cutting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122880767.6U CN216588708U (en) | 2021-11-23 | 2021-11-23 | Hydraulic top cutting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216588708U true CN216588708U (en) | 2022-05-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122880767.6U Active CN216588708U (en) | 2021-11-23 | 2021-11-23 | Hydraulic top cutting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216588708U (en) |
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2021
- 2021-11-23 CN CN202122880767.6U patent/CN216588708U/en active Active
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