CN110821507A - Ice particle gas jet flow assisted coal roadway fully-mechanized excavating machine coal breaking and dust suppression device and method - Google Patents
Ice particle gas jet flow assisted coal roadway fully-mechanized excavating machine coal breaking and dust suppression device and method Download PDFInfo
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- CN110821507A CN110821507A CN201911030087.6A CN201911030087A CN110821507A CN 110821507 A CN110821507 A CN 110821507A CN 201911030087 A CN201911030087 A CN 201911030087A CN 110821507 A CN110821507 A CN 110821507A
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- 239000003245 coal Substances 0.000 title claims abstract description 50
- 239000002245 particle Substances 0.000 title claims abstract description 33
- 239000000428 dust Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000001629 suppression Effects 0.000 title claims abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 82
- 239000007789 gas Substances 0.000 claims abstract description 78
- 239000007788 liquid Substances 0.000 claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 41
- 238000002347 injection Methods 0.000 claims abstract description 30
- 239000007924 injection Substances 0.000 claims abstract description 30
- 239000007921 spray Substances 0.000 claims abstract description 30
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 230000005641 tunneling Effects 0.000 claims description 21
- 238000009792 diffusion process Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000002817 coal dust Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims 1
- 238000005065 mining Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1066—Making by using boring or cutting machines with fluid jets
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/20—Drawing-off or depositing dust
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Nozzles (AREA)
Abstract
The invention belongs to the technical field of ice particle gas jet, and particularly discloses a coal breaking and dust suppression device and a method of an ice particle gas jet auxiliary coal roadway comprehensive excavating machine, which comprises an excavating system and an auxiliary coal breaking system, wherein the excavating system comprises the comprehensive excavating machine, a spray pipe and a support which are arranged on the comprehensive excavating machine, the auxiliary coal breaking system comprises an air compressor, an air cylinder, a water storage tank, a liquid nitrogen tank, a gas-liquid mixing cavity, an ice forming cavity and an injection cavity, the air outlets of the air compressor and the air cylinder are connected with the inlet of the air cylinder, the outlet of the air cylinder is connected with a gas channel, the outlet of the gas channel is respectively communicated with a first channel, a second channel and a third channel through a four-way valve, the outlet of the first channel is connected with the gas inlet at the bottom of the water storage tank, the second channel is connected with the inlet of the gas-liquid mixing cavity, the third channel is connected with an injection pipe in the injection cavity, the outlet of the water storage tank is connected with the gas-liquid mixing cavity, the gas-liquid mixing cavity is connected with the ice forming cavity, the outlet of the ice forming cavity is connected with the injection cavity, and the outlet of the injection cavity is connected with the spray pipe.
Description
Technical Field
The invention belongs to the technical field of ice particle gas jet, and particularly relates to a coal breaking and dust suppression device and method of an ice particle gas jet-assisted coal roadway fully-mechanized excavating machine.
Background
In the coal roadway tunneling construction, the use of the fully-mechanized tunneling machine is very extensive, but the fully-mechanized tunneling machine can cause overheating damage of a cutter tooth on a cutting head of the fully-mechanized tunneling machine after working for a long time, if the cutting head of the fully-mechanized tunneling machine is damaged by a cutter under the well, the damaged part needs to be disassembled and a new cutting head needs to be replaced, and an old cutting head needs to be transported to the well for maintenance, so that large-scale equipment is inconvenient to transport under the well, and a lot of manpower resources need to be wasted, therefore, the damage of the cutting head of the fully-mechanized tunneling machine can affect the coal roadway tunneling efficiency, so that corresponding auxiliary coal breaking equipment is needed to relieve the damage of the cutter tooth of the cutting head of the fully-mechanized tunneling machine, and the high-pressure water jet is used for assisting the fully-mechanized tunneling machine in the current stage, but the water consumption is large, the required pressure is large; secondly, a large amount of dust is generated in the tunneling process of the fully-mechanized excavating machine, the working environment of a tunneling surface is deteriorated, the health of workers is seriously affected, and the dust problem of the working surface cannot be completely solved only by means of ventilation measures of the working surface.
Disclosure of Invention
The invention aims to provide a coal breaking and dust suppression device and a coal breaking and dust suppression method for an ice particle gas jet flow auxiliary coal roadway roadheader.
In order to achieve the purpose, the invention adopts the technical scheme that:
an ice particle gas jet assisted coal roadway comprehensive tunneling machine coal-breaking dust suppression device comprises a tunneling system and an auxiliary coal-breaking system, wherein the tunneling system comprises a comprehensive tunneling machine, a spray pipe and a support which are arranged on the comprehensive tunneling machine, the auxiliary coal-breaking system comprises an air compressor, an air cylinder, a water storage tank, a liquid nitrogen tank, a gas-liquid mixing cavity, an ice-forming cavity and an injection cavity, an air outlet of the air compressor is connected with an inlet of the air cylinder, an outlet of the air cylinder is connected with an air channel, an outlet of the air channel is respectively communicated with a first channel, a second channel and a third channel through a four-way valve, an outlet of the first channel is connected with an air inlet at the bottom of the water storage tank, the second channel is connected with an inlet of the gas-liquid mixing cavity, the third channel is connected with an injection pipe in the injection cavity, an outlet of the injection pipe is provided with an injection nozzle, an outlet of the liquid nitrogen, the gas-liquid mixing cavity is connected with the ice forming cavity, the outlet of the ice forming cavity is connected with the injection cavity, and the outlet of the injection cavity is connected with the spray pipe.
Furthermore, the outlet of the injection cavity is connected with a plurality of spray pipes through hoses, a nozzle is arranged at the tail end of each spray pipe, the nozzle is a conical convergent nozzle, heat insulation layers are arranged on the outer sides of the hoses and the spray pipes, the spray pipes are connected through a support, the mounting angle between each spray pipe and a cutting head on the roadheader is 20-30 degrees, the spray pipes are located behind the cutting heads and are located at the same side of a press-in local ventilator on the roadheader, each spray pipe faces the cutter tooth feeding position of the roadheader, a display panel is further arranged on the roadheader and is electrically connected with a temperature sensor, and the injection cavity sequentially comprises a contraction section, a throat pipe section and a diffusion section.
Furthermore, the air compressor is a movable air compressor, the top of the air compressor is provided with two detachable air cylinders.
Furthermore, a pressure gauge and a control valve are arranged on the first channel, the second channel and the third channel.
Further, the water storage tank entrance is equipped with the pressure relief valve, and the exit of water storage tank is equipped with electromagnetic flowmeter and liquid flow valve, and the water storage tank is provided with atomizing nozzle with the junction of gas-liquid mixture chamber, atomizing nozzle's atomizing particle diameter is more than 1 mm.
Furthermore, the ice forming cavity is provided with an inner cavity and an outer cavity, the outlet of the liquid nitrogen tank is connected with the outer cavity of the ice forming cavity, temperature sensors are arranged at the inlet and the outlet of the ice forming cavity, and the temperature sensors transmit temperature data to the display panel; the top of the ice forming cavity is provided with two air exhaust bolts, the inner cavity of the ice forming cavity is enclosed by the inner wall of the ice forming cavity, and the inner wall of the ice forming cavity is coated with a layer of Zhishengwua ZS-611 ice and snow preventing coating.
A method for assisting a coal roadway fully-mechanized excavating machine with ice particle gas jet to break coal and suppress dust comprises the following steps:
(1) adding water into a water storage tank, starting an air compressor by using a liquid nitrogen tank with pressure, and filling gas into a gas cylinder;
(2) opening a temperature sensor and a display panel, opening a liquid nitrogen valve, injecting liquid nitrogen into the outer cavity of the icing cavity, and controlling the cooling speed of the icing cavity by adjusting the pressure of a liquid nitrogen tank and the tightness of an exhaust bolt;
(3) when the pressure of the gas storage cylinder reaches 5-7MPa, opening a control valve for controlling the second gas channel and the third gas channel, and simultaneously enabling the air compressor to continue to work;
(4) the control valve of the first gas channel is opened, and the valve is closed after the gas pressure reaches a certain value.
(5) When the temperature of the temperature display is lower than minus 60 ℃, opening a flow valve of the water storage tank, observing a flow meter, and adjusting the water flow to the range of 3-6L/min;
(6) the ice particle gas jet can start to erode the coal body, if the operation needs to be stopped, the flow valve is closed first, the air pressure stored in the water storage tank is discharged, then the liquid nitrogen tank valve is closed, then the air compressor is closed, all the valves are closed after the gas in the whole system is released, and the whole process is finished.
Further, in the ice particle gas jet process, whether liquid nitrogen and water are used up or not needs to be noticed, when any liquid nitrogen or water is used up, the flow valve is closed firstly, the pressure in the water tank is discharged through the pressure relief valve, then the control valve of the liquid nitrogen tank is closed, all gas channel control valves are closed, water or liquid nitrogen is added into the liquid nitrogen tank or the water storage tank, and after the charging operation is completed, the operation of the steps (2) to (5) is repeated.
The invention has the advantages that:
1. the ice particle gas jet generated by the device can firstly erode the coal body to pre-crack the coal body and reduce the damage to the cutter teeth of the cutting head of the roadheader, and secondly, the crushed ice particles melt and absorb heat to reduce the thermal wear of the cutter teeth of the cutting head of the roadheader, and the generation of dust can be inhibited by the water generated by melting;
2. the angle of the nozzle can determine the wind direction of the wind flow, so that dust is actively guided to be discharged out of a working face in time, and the harm of the dust to operators is reduced;
3. the design of drawing the chamber utilizes the fluid jet principle, contains two kinds of different pressure fluids in the device, spouts the great gas of velocity of flow from the nozzle in, can make draw the intracavity and produce the negative pressure to reinforcing the absorption to the ice particle in the icing intracavity, making ice particle gas jet can produce bigger exit velocity, reinforcing the erosion effect of ice particle gas jet.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic structural view of an ice forming cavity.
Fig. 3 is a schematic structural view of the injection cavity.
Figure 4 is a front view of the nozzle in relation to the cutter head arrangement.
Figure 5 is a side view of the nozzle in an arrangement corresponding to the cutting head.
1-an air compressor, 2-an air bottle, 3-a water storage tank, 4-a liquid nitrogen tank, 5-a gas-liquid mixing cavity, 6-an ice forming cavity, 7-an injection cavity, 8-a control valve, 9-a pressure gauge, 10-an electromagnetic flow meter, 11-a gas channel, 12-a flow valve, 13-an atomizing nozzle, 14-a display panel, 15-a spray pipe, 16-a nozzle, 17-a cutting head, 18-a bracket, 19-a cutter tooth, 1101-a first gas channel, 1102-a second gas channel, 1103-a third gas channel, 601-a temperature sensor, 602-an outer cavity, 603-an inner wall and 604-an exhaust bolt; 701-injection nozzle 702-injection pipe.
Detailed Description
As shown in the figure, the coal breaking and dust suppression device of the ice particle gas jet auxiliary coal roadway roadheader comprises a tunneling system and an auxiliary coal breaking system, wherein the tunneling system comprises the roadheader, a spray pipe 15 and a support 18 which are arranged on the roadheader, the auxiliary coal breaking system comprises an air compressor 1, at least one gas cylinder 2, a water storage tank 3, a liquid nitrogen tank 4, a gas-liquid mixing cavity 5, an ice forming cavity 6 and an injection cavity 7, the air compressor 1 provides gas with certain pressure for the whole device, the gas cylinders 2 are used for storing working gas with certain pressure and quantity required by work, the gas cylinders 2 can ensure the continuity of a jet working process and the stability of the gas pressure of the whole device through buffering the gas, two or more gas cylinders can provide a larger pressure gradient for the device through adjusting the combination form of different control valves 8, the requirements of different coal erosion are met, the application range is wide, the gas outlet of the air compressor 1 is connected with the inlet of the gas cylinders 2, the outlet of the gas bottle 2 is connected with a gas channel 11, the outlet of the gas channel 11 is respectively communicated with a first channel 1101, a second channel 1102 and a third channel 1103 through a four-way valve, the outlet of the first channel 1101 is connected with the gas inlet at the bottom of the water storage tank 3, the second channel 1102 is connected with the inlet of the gas-liquid mixing cavity 5, the third channel 1103 is connected with an injection pipe 702 in the injection cavity 7, the outlet of the injection pipe 702 is provided with an injection nozzle 701, the injection cavity sequentially comprises a contraction section, a throat section and a diffusion section, the interior of the injection cavity 7 is firstly contracted, so that two airflows are uniformly mixed, then the two airflows pass through the throat section, the diameter of the section is kept unchanged, the appropriate length enables the two airflows to be fully mixed, and the diffusion section is arranged at last, the diffusion section is used for ensuring the pressure recovery of the mixed fluid in the injection cavity, and partial kinetic energy at the, so as to overcome the outlet pressure and smoothly flow out; an outlet of the liquid nitrogen tank 4 is connected with the ice forming cavity 6, an outlet of the water storage tank 4 is connected with the gas-liquid mixing cavity 5, the gas-liquid mixing cavity 5 is connected with the ice forming cavity 6, an outlet of the ice forming cavity 6 is connected with the injection cavity 7, and an outlet of the injection cavity 7 is connected with the spray pipe 15; furthermore, the outlet of the injection cavity 7 is connected with a plurality of spray pipes 15 through hoses, the tail end of each spray pipe 15 is provided with a nozzle 16, each nozzle 16 is a conical convergent nozzle, the hoses and the outer sides of the spray pipes 15 are respectively provided with a heat insulation layer, the spray pipes 15 are connected through a support 18, the mounting angle between each spray pipe 15 and a cutting head 17 on the roadheader is 20-30 degrees, each spray pipe 15 is positioned behind the cutting head 17 and is positioned at the same side with a press-in type local ventilator on the roadheader, each spray pipe 15 faces the cutter feeding position of a cutter tooth 19 on the roadheader, the roadheader is further provided with a display panel 14, and the display panel 14 is electrically connected with a temperature sensor 601; the air compressor 1 is a movable air compressor, the top of the air compressor 1 is provided with two detachable air cylinders 2; a pressure gauge 9 and a control valve 8 are arranged on the first channel 1101, the second channel 1102 and the third channel 1103; a pressure relief valve is arranged at the inlet of the water storage tank 3, an electromagnetic flowmeter 10 and a liquid flow valve 12 are arranged at the outlet of the water storage tank 3, an atomizing nozzle 13 is arranged at the joint of the water storage tank 3 and the gas-liquid mixing cavity 5, and the atomizing particle size of the atomizing nozzle 13 is more than 1 mm; the ice forming cavity 6 is provided with an inner cavity and an outer cavity 602, the outlet of the liquid nitrogen tank 4 is connected with the outer cavity of the ice forming cavity 6, temperature sensors 601 are arranged at the inlet and the outlet of the ice forming cavity 6, and the temperature sensors 601 transmit temperature data to the display panel 14; the top of the ice forming cavity 6 is provided with two air exhaust bolts 604, the inner cavity of the ice forming cavity 6 is enclosed by the inner wall 603 of the ice forming cavity, and the inner wall of the ice forming cavity 6 is coated with a layer of Zhishenghua ZS-611 ice and snow preventing coating.
A method for carrying out auxiliary coal breaking and dust suppression by using the device sequentially comprises the following steps:
(1) adding water into a water storage tank 3, starting an air compressor 1 by using a liquid nitrogen tank 4 with pressure, and filling gas into a gas cylinder 2;
(2) turning on the temperature sensor 601 and the temperature display panel 14; opening a liquid nitrogen switch, injecting liquid nitrogen into the outer cavity of the icing cavity 6, and controlling the cooling speed of the icing cavity by adjusting the pressure of a liquid nitrogen tank and the tightness of an exhaust bolt 604;
(3) when the pressure of the gas cylinder 2 reaches a set value, opening control valves for controlling the second gas passage 1102 and the third gas passage 1103, and simultaneously enabling the air compressor 1 to continue to work;
(4) opening a valve of the first gas channel 1101, and closing the valve when the gas pressure reaches a certain value;
(5) when the temperature of the temperature display panel 14 is lower than minus 60 ℃, opening the flow valve 12 of the water storage tank, and adjusting the water flow to the range of 3L and 6L;
(6) the ice particle gas jet can start to erode the coal body, if the operation needs to be stopped, the flow valve 12 is closed, the air pressure stored in the water storage tank 3 is discharged, then the liquid nitrogen tank valve is closed, then the air compressor 1 is closed, all the valves 8 are closed after the gas in the whole system is released, and the whole process is finished;
in the ice particle gas jet process, attention is paid to whether liquid nitrogen and water are used up or not at any moment, when any liquid nitrogen or water is used up, a water valve 12 is closed firstly, the pressure in a water tank is discharged through a pressure relief valve, then a control valve of a liquid nitrogen tank 4 is closed, all control valves 8 are closed immediately, and water or liquid nitrogen is added into the liquid nitrogen tank 4 or a water storage tank 3; and (5) repeating the operations from the step (2) to the step (5) after the feeding operation is finished.
The device and the method are easy to realize and low in cost, can pre-erode the coal body on the tunneling working face by the device, pre-break the coal body, reduce the damage to the cutter teeth of the cutting head of the roadheader, simultaneously melt and absorb heat by the broken ice particles, can also reduce the thermal wear of the cutter teeth of the cutting head of the roadheader, and can play a role in inhibiting coal dust from being generated by water generated by melting. The air flow of the ice particle gas jet flow enhances ventilation and dust removal, and further improves the working environment of the driving working face.
Claims (8)
1. The utility model provides a supplementary coal road of ice granule gas jet synthesizes quick-witted broken coal dust suppression device of digging which characterized in that: the coal mining device comprises a tunneling system and an auxiliary coal breaking system, wherein the tunneling system comprises a fully-mechanized excavating machine, a spray pipe and a support which are arranged on the fully-mechanized excavating machine, the auxiliary coal breaking system comprises an air compressor, an air cylinder, a water storage tank, a liquid nitrogen tank, a gas-liquid mixing cavity, an ice forming cavity and an ejection cavity, an air outlet of the air compressor is connected with an inlet of the air cylinder, an outlet of the air cylinder is connected with a gas channel, an outlet of the gas channel is respectively communicated with a first channel, a second channel and a third channel through a four-way valve, an outlet of the first channel is connected with a gas inlet at the bottom of the water storage tank, the second channel is connected with an inlet of the gas-liquid mixing cavity, the third channel is connected with an ejection pipe in the ejection cavity, an outlet of the ejection pipe is provided with an ejection nozzle, an outlet of the liquid nitrogen tank is connected with the ice forming cavity, an outlet of the water, the outlet of the injection cavity is connected with the spray pipe.
2. The device for breaking coal and suppressing dust of the ice particle gas jet auxiliary coal roadway fully mechanized excavating machine as claimed in claim 1, wherein: the jet cavity outlet is connected with the plurality of spray pipes through hoses, a nozzle is arranged at the tail end of each spray pipe, the nozzle is a conical convergent nozzle, heat insulation layers are arranged on the outer sides of the hoses and the spray pipes, the spray pipes are connected through a support, the mounting angle between each spray pipe and a cutting head on the roadheader is 20-30 degrees, the spray pipes are located behind the cutting heads and are located at the same side with a press-in local ventilator on the roadheader, each spray pipe faces towards the cutter tooth feeding position of the roadheader, a display panel is further arranged on the roadheader and is electrically connected with a temperature sensor, and the jet cavity sequentially comprises a contraction section, a throat section and a diffusion section.
3. The device for breaking coal and suppressing dust of the ice particle gas jet auxiliary coal roadway fully mechanized excavating machine as claimed in claim 2, wherein: the air compressor is a movable air compressor, the top of the air compressor is provided with two detachable air cylinders.
4. The device for breaking coal and suppressing dust of the ice particle gas jet auxiliary coal roadway fully mechanized excavating machine as claimed in claim 3, wherein: and the first channel, the second channel and the third channel are provided with a pressure gauge and a control valve.
5. The device for breaking coal and suppressing dust of the ice particle gas jet auxiliary coal roadway fully mechanized excavating machine as claimed in claim 4, wherein: the water storage tank entrance is equipped with the pressure relief valve, and the exit of water storage tank is equipped with electromagnetic flowmeter and liquid flow valve, and the water storage tank is provided with atomizing nozzle with the junction of gas-liquid mixture chamber, atomizing nozzle's atomizing particle diameter is more than 1 mm.
6. The device for breaking coal and suppressing dust of the ice particle gas jet auxiliary coal roadway fully mechanized excavating machine as claimed in claim 5, wherein: the ice forming cavity is provided with an inner cavity and an outer cavity, the outlet of the liquid nitrogen tank is connected with the outer cavity of the ice forming cavity, temperature sensors are arranged at the inlet and the outlet of the ice forming cavity, and the temperature sensors transmit temperature data to the display panel; the top of the ice forming cavity is provided with two exhaust bolts, the inner cavity of the ice forming cavity is formed by enclosing the inner wall of the ice forming cavity, and the inner wall of the ice forming cavity is coated with a layer of ice and snow preventing coating.
7. A method for breaking coal and suppressing dust of an ice particle gas jet coal roadway auxiliary comprehensive excavating machine as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps:
(1) adding water into a water storage tank, starting an air compressor by using a liquid nitrogen tank with pressure, and filling gas into a gas cylinder;
(2) opening a temperature sensor and a display panel, opening a liquid nitrogen valve, injecting liquid nitrogen into the outer cavity of the icing cavity, and controlling the cooling speed of the icing cavity by adjusting the pressure of a liquid nitrogen tank and the tightness of an exhaust bolt;
(3) when the pressure of the gas storage cylinder reaches 5-7MPa, opening a control valve for controlling the second gas channel and the third gas channel, and simultaneously enabling the air compressor to continue to work;
(4) the control valve of the first gas channel is opened, and the valve is closed after the gas pressure reaches a certain value.
(5) When the temperature of the temperature display is lower than minus 60 ℃, opening a flow valve of the water storage tank, observing a flow meter, and adjusting the water flow to the range of 3-6L/min;
(6) the ice particle gas jet can start to erode the coal body, if the operation needs to be stopped, the flow valve is closed first, the air pressure stored in the water storage tank is discharged, then the liquid nitrogen tank valve is closed, then the air compressor is closed, all the valves are closed after the gas in the whole system is released, and the whole process is finished.
8. The method for breaking coal and suppressing dust of the ice particle gas jet-assisted coal roadway fully mechanized excavating machine as claimed in claim 7, characterized in that: in the ice particle gas jet process, attention needs to be paid to whether liquid nitrogen and water are used or not, when any liquid nitrogen or water is used up, the flow valve is closed firstly, the pressure in the water tank is discharged through the pressure relief valve, then the control valve of the liquid nitrogen tank is closed, all gas channel control valves are closed, water or liquid nitrogen is added into the liquid nitrogen tank or the water storage tank, and after the charging operation is completed, the operation of the steps (2) to (5) is repeated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911030087.6A CN110821507A (en) | 2019-10-28 | 2019-10-28 | Ice particle gas jet flow assisted coal roadway fully-mechanized excavating machine coal breaking and dust suppression device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911030087.6A CN110821507A (en) | 2019-10-28 | 2019-10-28 | Ice particle gas jet flow assisted coal roadway fully-mechanized excavating machine coal breaking and dust suppression device and method |
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| CN110821507A true CN110821507A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911030087.6A Pending CN110821507A (en) | 2019-10-28 | 2019-10-28 | Ice particle gas jet flow assisted coal roadway fully-mechanized excavating machine coal breaking and dust suppression device and method |
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| CN (1) | CN110821507A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114607336B (en) * | 2022-03-08 | 2023-10-27 | 煤炭科学技术研究院有限公司 | Colliery underground high-pressure gas-liquid two-phase jet impact pressure relief and reflection increasing method |
-
2019
- 2019-10-28 CN CN201911030087.6A patent/CN110821507A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114607336B (en) * | 2022-03-08 | 2023-10-27 | 煤炭科学技术研究院有限公司 | Colliery underground high-pressure gas-liquid two-phase jet impact pressure relief and reflection increasing method |
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