CN103510936A - Double-ejector type three-phase jet flow slotting system and method - Google Patents
Double-ejector type three-phase jet flow slotting system and method Download PDFInfo
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- CN103510936A CN103510936A CN201310465362.3A CN201310465362A CN103510936A CN 103510936 A CN103510936 A CN 103510936A CN 201310465362 A CN201310465362 A CN 201310465362A CN 103510936 A CN103510936 A CN 103510936A
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Abstract
The invention discloses a double-ejector type three-phase jet flow slotting system and method. The system mainly comprises a water tank, a high pressure pump, a grinding material pot, a liquid-solid ejector, an air compressor, a liquid-gas ejector, a drilling machine and a slotting drill bit. The system is of a unique double-ejector structure, grinding material particles and compressed air are mixed into high pressure water by the utilization of jetting, the grinding material particles, the compressed air and the high pressure water are evenly mixed to form a three-phase jet flow, and the three-phase jet flow passes through a water swivel and a drill rod and enters the slotting drill bit to perform slotting on the coal. A stirrer at the bottom of the grinding material pot can effectively prevent grinding materials from being hardened and subsiding. The medium ratio of the three-phase jet flow can be adjusted through a stop valve of a bypass waterway. The three-phase jet flow can effectively improve the cutting capacity of the jet flow, lower threshold pressure, solve the problems that holes are blocked, gas are sprayed out of the holes and the gas concentration exceeds the limit, improve the pressure relief anti-reflection effect and gas extraction efficiency of the slotting operation, and have high practicability.
Description
Technical field
The present invention relates to a kind of jet slotting system and method, especially a kind of two injection type three-phase jet slotting systems and method being applicable under coal mine.
Background technology
Gas Disaster is the biggest obstacle of restriction China's coal-mine safety in production, and the generation of gas accident, has brought great threat to Safety of Coal Mine Production, has caused huge casualties and economic loss.At present, gas pumping is the major measure of administering mine gas.Yet, China coal-bed gas compose deposit there is micropore, the feature of low-permeability, high adsorption, gas control difficulty is very big, how efficient extraction low air permeability coal seam gas has become a first-class difficult problem for gas control.
At present, release anti-reflection measure in coal seam mainly contains: deep hole blasting, fracturing etc.But due to the restriction of the factors such as working condition, safety condition and cost of production, actual effect is not remarkable.China has proposed the anti-reflection technology of hydraulic slotted liner technique release in twentieth century the seventies, and result of study proves that this technology can effectively improve gas permeability of coal seam, has realized the efficient extraction of coal-bed gas.This technology utilizes high-pressure water jet in established boring, coal body to be cut, and when geostatic stress is shifted to deep, has increased gas permeability of coal seam, has improved single hole influence basin, thereby has significantly reduced gas pressure, improves extraction efficiency.
The working media of hydraulic slotted liner technique technology is mainly pure water at present, cutting power a little less than, and pure water jets exists in operation process, and water supply volume is large, system pressure is too high, backwater returns the problems such as smooth, the easy plug-hole of ickings, easy spray orifice and gas exceeding limit, has directly affected safety and the release antireflective effect to coal body in operation process.The problem existing based on pure water jets slotting process, study the anti-reflection equipment of new and effective jet slot and technology to strengthen the ability of jet slot, improve single hole influence basin, thereby increase coal body gas permeability, reduce system job pressure simultaneously, reduce plug-hole, spray orifice phenomenon in operation process, improve operational security, Safety of Coal Mine Production tool is of great significance.
Summary of the invention
Technical problem: the object of the invention is to overcome the deficiency in prior art, provide a kind of simple in structure, prevent plug-hole, spray orifice, there is two injection type three-phase jet slotting systems and the method for stronger cutting power.
Technical scheme: of the present invention pair of injection type three-phase jet slotting system, comprise water tank, high-pressure pump, four-way, liquid-solid injector, air compressor, liquid gas ejector, threeway, rig, drilling rod and seam cutting drill bit, described drilling rod is provided with water and distinguishes, water is distinguished by the road and is connected with water tank with threeway, liquid gas ejector, liquid-solid injector, four-way, high-pressure pump successively, between four-way and threeway, be provided with bypass waterway, between four-way and liquid-solid injector, be provided with abrasive can, abrasive can bottom is provided with agitator; Described liquid gas ejector comprises the mixing nozzle being connected with liquid-solid injector and the pressure-air nozzle being connected with air compressor, described liquid-solid injector comprises the hydraulic spray being connected with four-way and the abrasive jet being connected with abrasive can, and abrasive can top is connected with four-way.
Between described high-pressure pump and four-way, be equipped with one way valve between air compressor and liquid gas ejector; Described bypass waterway is provided with stop valve.
Two injection type three-phase jet slot methods of using said system, comprise the steps:
A, water enter high-pressure pump from water tank, form water under high pressure, and water under high pressure enters four-way by one way valve;
B, from four-way water under high pressure out, be divided into three tunnels: road water by bypass waterway and stop valve, enter threeway, the water of setting out on a journey enters abrasive can, under the stirring action of agitator, form water, abrasive mixture with abrasive material, Road water enters liquid-solid injector by hydraulic spray, produce negative pressure, by abrasive jet, the water in abrasive can, abrasive mixture injection are entered to liquid-solid injector;
C, from liquid-solid injector water, abrasive mixture out, by mixing nozzle, enter liquid gas ejector, produce negative pressure, compressed air injection air compressor being produced by pressure-air nozzle enters liquid gas ejector, and water, abrasive mixture and compressed air are mixed to form three-phase mixture;
D, from liquid gas ejector three-phase mixture out, enter threeway, be mixed to form three-phase jet with the water under high pressure of bypass waterway;
E, three-phase jet are distinguished with drilling rod and are entered seam cutting drill bit by water, by jet-action, coal body are carried out to slot.
Beneficial effect: compared with the prior art, major advantage has in the present invention:
A, double injector structure of the present invention can form the three-phase mixing jet of water under high pressure, abrasive material and air, fully combine high frequency erosion, ablation, the cavitation effect of bubble and the pulse water hammering of water under high pressure of abrasive particle, aggravated the destruction to coal body, effectively improved jet cutting power, promote the anti-reflection effect of release of coal body, strengthened gas pumping effect;
B, the stirring action by agitator make water fully mix with abrasive material, have effectively stopped that abrasive particle hardens, deposited phenomenon, by being located at the stop valve on bypass waterway, can regulate in real time the medium size composition of three-phase jet;
C, when fully guaranteeing slot effect, effectively reduce the thresholding pressure of system works, improved operational security;
D, when fully guaranteeing slot effect, by the introducing of gas medium, solved that the water supply volume that pure water jets exists is large, backwater returns that ickings is smooth, easily plug-hole, the easy problem such as spray orifice and gas exceeding limit.
Accompanying drawing explanation
Fig. 1 is of the present invention pair of injection type three-phase jet slotting system structural representation;
Fig. 2 is liquid-solid ejector structure schematic diagram of the present invention;
Fig. 3 is liquid gas ejector structural representation of the present invention.
In figure: 1-water tank, 2-high-pressure pump, 3-one way valve, 4-four-way, 5-bypass waterway, 6-stop valve, 7-abrasive can, 8-agitator, the liquid-solid injector of 9-, 10-air compressor, 11-liquid gas ejector, 12-threeway, 13-water is distinguished, 14-rig, 15-drilling rod, 16-seam cutting drill bit, 17-hydraulic spray, 18-abrasive jet, 19-mixing nozzle, 20-pressure-air nozzle.
The specific embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
As shown in Figure 1, of the present invention pair of injection type three-phase jet slotting system, mainly by water tank 1, high-pressure pump 2, four-way 4, abrasive can 7, liquid-solid injector 9, air compressor 10, liquid gas ejector 11, threeway 12, rig 14, drilling rod 15 and seam cutting drill bit 16, formed, on described drilling rod 15, be provided with water and distinguish 13, water distinguishes that 13 are connected with drilling rod 15, water distinguishes that 13 are arranged on rig 14 with drilling rod 15, and seam cutting drill bit 16 is arranged on drilling rod 15.Water distinguishes that 13 are connected with threeway 12, liquid gas ejector 11, liquid-solid injector 9, four-way 4, high-pressure pump 2 and water tank 1 by the road successively; Between four-way 4 and threeway 12, be provided with bypass waterway 5, between four-way 4 and liquid-solid injector 9, be provided with abrasive can 7, abrasive can 7 bottoms are provided with agitator 8; Between described high-pressure pump 2 and four-way 4, be provided with one way valve 3 between air compressor 10 and liquid gas ejector 11.Described abrasive can 7 tops are connected with four-way 4, and abrasive can 7 bottoms are provided with agitator 8; Between described four-way 4 and threeway 12, be provided with bypass waterway 5, bypass waterway 5 is provided with stop valve 6.
As shown in Figure 2, liquid-solid injector 9 comprises hydraulic spray 17 and abrasive jet 18, and hydraulic spray 17 is connected with four-way 4, and abrasive jet 18 is connected with abrasive can 7.
As shown in Figure 3, liquid gas ejector 11 comprises mixing nozzle 19 and pressure-air nozzle 20, and mixing nozzle 19 is connected with liquid-solid injector 11, and pressure-air nozzle 20 is connected with air compressor 10.
Of the present invention pair of injection type three-phase jet slot method:
A, water enter high-pressure pump 2 from water tank 1, form water under high pressure, and water under high pressure enters four-way 4 by one way valve 3;
B, from four-way 4 water under high pressure out, be divided into three tunnels: road water by bypass waterway 5 and stop valve 6, enter threeway 12, the water of setting out on a journey enters abrasive can 7, under the stirring action of agitator 8, form water, abrasive mixture with abrasive material, Road water enters liquid-solid injector 9 by hydraulic spray 17, produce negative pressure, by abrasive jet 18, the water in abrasive can 7, abrasive mixture injection are entered to liquid-solid injector 9;
C, from liquid-solid injector 9 water, abrasive mixture out, by mixing nozzle 19, enter liquid gas ejector 11, produce negative pressure, compressed air injection air compressor 10 being produced by pressure-air nozzle 20 enters liquid gas ejector 11, and water, abrasive mixture and compressed air are mixed to form three-phase mixture;
D, from liquid gas ejector 11 three-phase mixture out, enter threeway 12, be mixed to form three-phase jet with the water under high pressure of bypass waterway 5;
E, three-phase jet by water distinguish 13 and drilling rod 15 enter seam cutting drill bit 16, by jet-action, coal body is carried out to slot.
Claims (4)
1. a two injection type three-phase jet slotting system, comprise water tank (1), high-pressure pump (2), four-way (4), liquid-solid injector (9), air compressor (10), liquid gas ejector (11), threeway (12), rig (14), drilling rod (15) and seam cutting drill bit (16), it is characterized in that: described drilling rod (15) is provided with water and distinguishes (13), water distinguish (13) by the road successively with threeway (12), liquid gas ejector (11), liquid-solid injector (9), four-way (4), high-pressure pump (2) is connected with water tank (1), between four-way (4) and threeway (12), be provided with bypass waterway (5), between four-way (4) and liquid-solid injector (9), be provided with abrasive can (7), abrasive can (7) bottom is provided with agitator (8), described liquid gas ejector (11) comprises the mixing nozzle (19) being connected with liquid-solid injector (11) and the pressure-air nozzle (20) being connected with air compressor (10), described liquid-solid injector (9) comprises the hydraulic spray (17) being connected with four-way (4) and the abrasive jet (18) being connected with abrasive can (7), and abrasive can (7) top is connected with four-way (4).
2. a kind of pair of injection type three-phase jet slotting system according to claim 1, is characterized in that: between described high-pressure pump (2) and four-way (4), be equipped with one way valve (3) between air compressor (10) and liquid gas ejector (11).
3. a kind of pair of injection type three-phase jet slotting system according to claim 1, is characterized in that: described bypass waterway (5) is provided with stop valve (6).
4. two injection type three-phase jet slot methods of system according to claim 1, is characterized in that, comprise the steps:
A, water enter high-pressure pump (2) from water tank (1), form water under high pressure, and water under high pressure enters four-way (4) by one way valve (3);
B, from four-way (4) water under high pressure out, be divided into three tunnels: road water by bypass waterway (5) and stop valve (6), enter threeway (12), the water of setting out on a journey enters abrasive can (7), under the stirring action of agitator (8), form water, abrasive mixture with abrasive material, Road water enters liquid-solid injector (9) by hydraulic spray (17), produce negative pressure, by abrasive jet (18), the water in abrasive can (7), abrasive mixture injection are entered to liquid-solid injector (9);
C, from liquid-solid injector (9) water, abrasive mixture out, by mixing nozzle (19), enter liquid gas ejector (11), produce negative pressure, compressed air injection air compressor (10) being produced by pressure-air nozzle (20) enters liquid gas ejector (11), and water, abrasive mixture and compressed air are mixed to form three-phase mixture;
D, from liquid gas ejector (11) three-phase mixture out, enter threeway (12), be mixed to form three-phase jet with the water under high pressure of bypass waterway (5);
E, three-phase jet distinguish that by water (13) and drilling rod (15) enter seam cutting drill bit (16), carry out slot by jet-action to coal body.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103921216A (en) * | 2014-04-08 | 2014-07-16 | 中国海洋工程公司 | Three-phase cavitation abrasive water jet cutting device |
| CN104533513A (en) * | 2015-01-07 | 2015-04-22 | 河南理工大学 | High-pressure abrasive material gas jet coal-breaking pressure relief and permeability improvement equipment and method |
| CN106121611A (en) * | 2016-06-29 | 2016-11-16 | 河南理工大学 | A kind of big height long distance tripping wind conveying grinding material device and carrying method |
| CN107485817A (en) * | 2017-08-23 | 2017-12-19 | 中国矿业大学 | A kind of three-phase jet fire control technology movable type experiment porch and its application process |
| CN111877995A (en) * | 2020-07-20 | 2020-11-03 | 南京集优智库信息技术有限公司 | Water outlet type trenching device distributed at center of main shaft of cutter head |
| CN112267911A (en) * | 2020-10-23 | 2021-01-26 | 中国矿业大学 | Gas-liquid-solid three-phase jet permeability increasing device and permeability increasing method for soluble gas |
| CN113731291A (en) * | 2021-10-02 | 2021-12-03 | 河南理工大学 | Grinding material stirring device for underground hydraulic slotting and online continuous grinding material water supply method |
| CN114165197A (en) * | 2021-12-09 | 2022-03-11 | 中国矿业大学(北京) | Pressure-relief and permeability-increasing device and method for pulse hydraulic fracturing coal seam |
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| CN103075180A (en) * | 2013-01-15 | 2013-05-01 | 中国矿业大学 | Gas-liquid two-phase jet slotting system and method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103921216A (en) * | 2014-04-08 | 2014-07-16 | 中国海洋工程公司 | Three-phase cavitation abrasive water jet cutting device |
| CN103921216B (en) * | 2014-04-08 | 2017-01-25 | 中国海洋工程公司 | Three-phase cavitation abrasive water jet cutting device |
| CN104533513A (en) * | 2015-01-07 | 2015-04-22 | 河南理工大学 | High-pressure abrasive material gas jet coal-breaking pressure relief and permeability improvement equipment and method |
| CN106121611A (en) * | 2016-06-29 | 2016-11-16 | 河南理工大学 | A kind of big height long distance tripping wind conveying grinding material device and carrying method |
| CN107485817A (en) * | 2017-08-23 | 2017-12-19 | 中国矿业大学 | A kind of three-phase jet fire control technology movable type experiment porch and its application process |
| CN111877995A (en) * | 2020-07-20 | 2020-11-03 | 南京集优智库信息技术有限公司 | Water outlet type trenching device distributed at center of main shaft of cutter head |
| CN112267911A (en) * | 2020-10-23 | 2021-01-26 | 中国矿业大学 | Gas-liquid-solid three-phase jet permeability increasing device and permeability increasing method for soluble gas |
| CN113731291A (en) * | 2021-10-02 | 2021-12-03 | 河南理工大学 | Grinding material stirring device for underground hydraulic slotting and online continuous grinding material water supply method |
| CN114165197A (en) * | 2021-12-09 | 2022-03-11 | 中国矿业大学(北京) | Pressure-relief and permeability-increasing device and method for pulse hydraulic fracturing coal seam |
| CN114165197B (en) * | 2021-12-09 | 2022-07-05 | 中国矿业大学(北京) | Pressure-relief and permeability-increasing device and method for pulse hydraulic fracturing coal seam |
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