CN108035767A - Coal mine gas injecting system and for flow type pump with injection device therein - Google Patents
Coal mine gas injecting system and for flow type pump with injection device therein Download PDFInfo
- Publication number
- CN108035767A CN108035767A CN201810009171.9A CN201810009171A CN108035767A CN 108035767 A CN108035767 A CN 108035767A CN 201810009171 A CN201810009171 A CN 201810009171A CN 108035767 A CN108035767 A CN 108035767A
- Authority
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- China
- Prior art keywords
- coal mine
- gas
- flow type
- type pump
- injection device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002347 injection Methods 0.000 title claims abstract description 42
- 239000007924 injection Substances 0.000 title claims abstract description 42
- 239000003245 coal Substances 0.000 title claims abstract description 31
- 238000012544 monitoring process Methods 0.000 claims abstract description 46
- 238000010790 dilution Methods 0.000 claims abstract description 22
- 239000012895 dilution Substances 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 22
- 210000004907 gland Anatomy 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 210000003101 oviduct Anatomy 0.000 description 11
- 238000005065 mining Methods 0.000 description 3
- 241000209149 Zea Species 0.000 description 2
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 2
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 2
- 235000008429 bread Nutrition 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 235000005822 corn Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
A kind of coal mine gas injecting system and for flow type pump with injection device therein, belongs to technical field of mine safety；The technical problem to be solved is that provide a kind of coal mine gas injecting system and for flow type pump with injection device therein；Wherein ejection system includes monitoring host computer, data message converting transmission device and gas dilution unit and signal repeater, monitoring host computer and data message converting transmission device are set on the ground, monitoring host computer is connected with data message converting transmission device, gas dilution unit and signal repeater are arranged on underground coal mine, multiple gas dilution units are separately positioned on the different operating area of underground coal mine, are connected between each other by signal repeater.
Description
Technical field
A kind of coal mine gas injecting system of the present invention and for flow type pump with injection device therein, belongs to technical field of mine safety.
Background technology
According to China's coal-mine mining type and geological state, more than 80% Coal Exploitation is mined with retrusive, is being mined
Cheng Zhonghui is emerged substantial amounts of gas, therefore mining listed corporations invest huge fund and solve the problems, such as gas exceeding limit every year, but up to now
Still it is not perfect enough, by gas drainage system, the gas in coal seam can be taken out, arrange, put.Due to underground geographical environment
It is special, however it remains dead angle, blind area.Such as：As coal working face constantly lengthens, retrusive Top Corner Gas on Coal Face
Show increasingly severe with rendezvous problem, the remaining high concentration gas of extraction all concentrates on this in goaf and coal seam
In, therefore form an extremely dangerous region；At the dead angle that main airstream fails to enter, such as a transporter steamed bread of corn, hoist house, material
Expect storehouse and electromechanical chamber etc., drift section change or corner, back emit eminence, and usually accumulated methane, forms jeopardously
Band；In Bracing Process is tunneled, when running into tomography, couch song when geological structural belt or mining influence, lane often occurs for coal mine roadway
Road roof collapse, due to geologic change and architectonic presence, often to form caving place etc. because coal seam is locally thicker.
In order to solve the problems, such as this, the applicant has invented a kind of injection type gas diluter and for injection therein
Component, the patent No.：ZL 201520672014.8.The application is incorporated herein in the full text of the patent.Wherein describe a kind of injection type
Gas diluter, it includes end cap and oviduct, and end cap and oviduct together constitute injection component, in figure, the loudspeaker in left side
The taper end of pipe is inlet end, the butt end of oviduct on right side is outlet side, is collectively forming on the outside of the taper end of oviduct with end cap
Toroidal cavity, toroidal cavity are in communication with the outside by pressure port, are especially connected with extraneous compressed gas source.Toroidal cavity
Multiple through holes have been annularly disposed towards oviduct, have especially circlewise been set in the end of the remote oviduct taper end of toroidal cavity
Multiple through holes are equipped with, toroidal cavity is connected by through hole with the inner cavity of oviduct.By being passed through compressed gas, example at pressure port
Such as compressed air, compressed air enters in toroidal cavity, in the toroidal cavity, compressed air obtain a degree of expansion,
Flowing velocity is also improved at the same time, is then injected through multiple through holes on toroidal cavity to the inner cavity of oviduct, according to " Kong Da
Effect ", these air-flows injected will inject chamber of the gas such as air of loudspeaker tube cavity along loudspeaker tube cavity from through hole
The neighbouring flow at high speed of wall, so that the interior intracavitary in oviduct forms negative pressure, and then the air on the outside of oviduct taper end is from inlet end
Suction, spreads along the loudspeaker tube cavity of gradual thickening, is projected at a high speed from the outlet side of oviduct butt end.When in use, general watt
High methane region in the inlet end alignment coal mine of this diluter, can be by the air in high methane region in compressed gas
Injection under, by injection to the region away from high methane region, so as to achieve the purpose that to dilute the gas in high methane region.
The injection type gas diluter, since the structural principle of its injection is also commonly referred to as flow type pump with injection device, rises in production
Impetus is arrived.But with increasing for practice, also there are following limitation for the flow type pump with injection device：
1. flow type pump with injection device is installed on after dead angle, blind area gas region, Open valve, equipment is started to work, when gas is dense
After degree lowers, flow type pump with injection device is also working on, it is impossible to which automatic start-stop, causes air quantity to waste, and it is pneumatic to influence other
The operation of equipment.
2. the air compressor machine long-time non-stop run of Ventilator Room, easily influences service life of equipment.
3. it is unable to unified implementation system administration.
4. cannot real-time measure and control gas density directly perceived, often gas density one is high, and field personnel takes in a hurry
Some measures, or even scene is withdrawn, it can not accomplish the prediction and prevention of science in advance.
The content of the invention
The present invention is at least one limitation for partly overcoming aforementioned background art part to be previously mentioned, there is provided Yi Zhongmei
Ore deposit gas ejection system, and for the flow type pump with injection device in the ejection system.Specifically：
A kind of coal mine gas injecting system, including monitoring host computer and gas dilution unit, multiple gas dilution unit difference
The different operating area of underground coal mine is arranged on, the gas dilution unit includes Collecting operation region gas density signal
Firedamp sensor and flow type pump with injection device, monitoring host computer control the compression of the flow type pump with injection device of each operating area according to gas density signal
Air feeding amount.
Further, data message converting transmission device is further included, monitoring host computer is connected with data message converting transmission device
And set on the ground, data message converting transmission device is connected with each gas dilution unit.
Further, signal repeater is further included, one of data message converting transmission device and multiple gas dilution units phase
Even, each gas dilution unit is connected by signal repeater between each other.
Further, the gas dilution unit further includes downhole monitoring substation, intrinsic safety electric source module, circuit breaker, electromagnetism
Valve and compressed-air filter, intrinsic safety electric source module are connected with the power input of downhole monitoring substation, downhole monitoring substation with
Data message converting transmission device is connected, and firedamp sensor is connected with the input terminal of downhole monitoring substation, downhole monitoring substation
Output terminal is connected with circuit breaker, and circuit breaker is connected with the control terminal of solenoid valve, and compressed-air filter introduces the compression on ground
Air, enters the entrance of flow type pump with injection device after solenoid valve.
Further, monitoring guest machine, server and audible-visual annunciator, the monitoring guest machine and the server are further included
It is connected, the server is connected with the audible-visual annunciator.
Further, multi-channel image processor system is further included, the multi-channel image processor system is connected with the monitoring host computer.
Further, remote terminal is further included, the remote terminal is connected with the monitoring host computer.
A kind of flow type pump with injection device, including gland component and loudspeaker duct member, gland component and loudspeaker duct member are collectively formed and drawn
Penetrate component, the taper end of loudspeaker duct member is air inlet, the butt end of loudspeaker duct member is gas outlet, on the outside of the taper end of loudspeaker duct member
Toroidal cavity is collectively forming with end cap, toroidal cavity is connected by gas access with ambient atmos source, and toroidal cavity is towards loudspeaker
Pipe is circlewise provided with multiple through holes, so that toroidal cavity is connected by through hole with the inner cavity of loudspeaker duct member.
By a kind of foregoing coal mine gas injecting system, can be adjusted different according to the gas density of underground different zones
The working status of the gas diluter in region, so as to improve the diluted efficiency of fire damp and ability, partly overcomes background
Limitation mentioned by technology segment.
Brief description of the drawings
The present invention is described further below in conjunction with the accompanying drawings.
Fig. 1 is the system structure diagram of the present invention.
In figure, 1- multi-channel image processor systems, 2- monitoring guest machines, 3- servers, 4- monitoring host computers, 5- audible-visual annunciators,
6- remote terminals, 7- data message converting transmission devices, 8- intrinsic safety electric source modules, 9- downhole monitoring substations, 10- methane sensings
Device, 11- flow type pump with injection devices, 12- solenoid valves, 13- circuit breakers, 14- compressed-air filters, 15- signal repeaters, 16- air pipes
Road.
Embodiment
As shown in Figure 1, a kind of coal mine gas injecting system, including monitoring host computer 4,7 and of data message converting transmission device
Gas dilution unit and signal repeater 15, monitoring host computer 4 and data message converting transmission device 7 are set on the ground, monitoring
Host 4 is connected with data message converting transmission device 7, and gas dilution unit and signal repeater 15 are arranged on underground coal mine, more
A gas dilution unit is separately positioned on the different operating area of underground coal mine, is connected between each other by signal repeater 15.
Gas dilution unit include downhole monitoring substation 9, intrinsic safety electric source module 8, firedamp sensor 10, flow type pump with injection device 11,
Circuit breaker 13, solenoid valve 12 and compressed-air filter 14, intrinsic safety electric source module 8 and the power input of downhole monitoring substation 9
It is connected, downhole monitoring substation 9 is connected with data message converting transmission device 7, and firedamp sensor 10 is defeated with downhole monitoring substation 9
Entering end to be connected, the output terminal of downhole monitoring substation 9 is connected with circuit breaker 13, and circuit breaker 13 is connected with the control terminal of solenoid valve 12,
Compressed air enters along after the calm the anger compressed air filter 14 of pipeline 16, solenoid valve 12 through air accumulator after air compressor machine output and draws
The entrance of ejector 11.
Further include monitoring guest machine 2, server 3 and audible-visual annunciator 5, the monitoring guest machine 2 and 3 phase of server
Even, the server 3 is connected with the audible-visual annunciator 5.
Multi-channel image processor system 1 is further included, the multi-channel image processor system 1 is connected with the monitoring host computer 4.More pictures are shown
It is substantially a kind of display device to show system 1, it can show many kinds of parameters or information according to actual conditions.
Remote terminal 6 is further included, the remote terminal 6 is connected with the monitoring host computer 4.
It should be noted that in the accompanying drawings, multi-channel image processor system 1, monitoring guest machine 2, monitoring host computer 4, remote terminal 6
In in the accompanying drawings it can be seen that there is many spuious points, this is that all have display unit to embody these components, and display is singly
Information can be shown in member.Certainly, consider for cost etc., one or more of these components can not also configure display
Unit.In addition, in the accompanying drawings at flow type pump with injection device 11 it can also be seen that many spuious points, this be in order to embody flow type pump with injection device 11 to
There are air or mixed gas or gas-liquid mixture etc. to eject outside, it is, of course, understood that spuious point is not formed pair
The limitation of ejecta form, quantity etc..
Flow type pump with injection device includes gland component and loudspeaker duct member, and gland component and loudspeaker duct member collectively form injection portion
Part, the taper end of loudspeaker duct member is air inlet, the butt end of loudspeaker duct member is gas outlet, on the outside of the taper end of loudspeaker duct member with end
Lid is collectively forming toroidal cavity, and toroidal cavity is connected by gas access with ambient atmos source, and toroidal cavity is towards loudspeaker pipe ring
Multiple through holes are provided with to shape, so that toroidal cavity is connected by through hole with the inner cavity of loudspeaker duct member.
Working process and principle of the invention are further illustrated：
The present invention at work, the equipment that the output port of downhole monitoring substation 9 is connected to the multiple working regions of underground coal mine,
Such as：Hoist house equipment, material library facilities, electromechanical chamber equipment, drift section or corner's equipment, top plate height emit place's equipment,
Face upper corner angle equipment, transporter steamed bread of corn equipment, closed wall equipment, single gas is also provided with these working regions and is passed
Sensor 10, when some region of gas density is higher than methane prediction value, circuit breaker 13 to the power supply of solenoid valve 12 that is connected into
Row unlock, solenoid valve 12 are opened, and introduce compressed air, are started flow type pump with injection device 11 and are blown into air to high methane concentration range to reach
This diluted effect of working region gas.
The present invention also has the coordination control ability to different operating region flow type pump with injection device 11, makes the flow type pump with injection device in each region
11 are operated in most rational state.
For example, a-quadrant is diluted by flow type pump with injection device, and gas density has been lowered to 0.50%CH4Hereinafter, B
Region gas density is 1.3%CH at this time4, it is positive to be badly in need of quick reduction, but since A areas flow type pump with injection device disappears air quantity and pressure
Consumption, makes the flow type pump with injection device cisco unity malfunction in B areas, causes injection deficiency in draught, cause flow type pump with injection device to play performance completely,
B areas gas is caused to be unable to rapid dilution.In this case, monitoring host computer 4 collects the gas density of each working region, according to pressure
The quantity delivered of contracting air, implements open and close controlling so that gas density is obtained compared with high workload region to the solenoid valve 12 of different zones
Larger compressed air quantity delivered, and the relatively low working region of gas density obtains less compressed air quantity delivered.Gas is dense
Degree has returned to the working region of level of security, closes the solenoid valve 12 in the region, stops injection.
The embodiment of the present invention is explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementation
Example, within the knowledge of a person skilled in the art, can also make on the premise of present inventive concept is not departed from
Go out various change.
Claims (8)
- A kind of 1. coal mine gas injecting system, it is characterised in that：Including monitoring host computer (4) and gas dilution unit, multiple gas Dilution unit is separately positioned on the different operating area of underground coal mine, and the gas dilution unit includes Collecting operation region watt The firedamp sensor (10) and flow type pump with injection device (11) of this concentration signal, monitoring host computer (4) control each according to gas density signal The compressed air feeding amount of the flow type pump with injection device (11) of operating area.
- A kind of 2. coal mine gas injecting system according to claim 1, it is characterised in that：Data message conversion is further included to pass Defeated device (7), monitoring host computer (4) are connected with data message converting transmission device (7) and set on the ground, and data message turns Transmitting device (7) is changed with each gas dilution unit to be connected.
- A kind of 3. coal mine gas injecting system according to claim 1 or 2, it is characterised in that：Further include signal repeater (15), one of data message converting transmission device (7) and multiple gas dilution units are connected, and each gas dilution unit is mutual It is connected by signal repeater (7).
- A kind of 4. coal mine gas injecting system according to claim 3, it is characterised in that：The gas dilution unit is also Including downhole monitoring substation (9), intrinsic safety electric source module (8), circuit breaker (13), solenoid valve (12) and compressed-air filter (14), intrinsic safety electric source module (8) is connected with the power input of downhole monitoring substation (9), and downhole monitoring substation (9) is believed with data Cease converting transmission device (7) to be connected, firedamp sensor (10) is connected with the input terminal of downhole monitoring substation (9), downhole monitoring point The output terminal of (9) of standing is connected with circuit breaker (13), and circuit breaker (13) is connected with the control terminal of solenoid valve (12), compressed air filtering Device (14) introduces the compressed air on ground, and the entrance of flow type pump with injection device (11) is entered after solenoid valve (12).
- A kind of 5. coal mine gas injecting system according to claim 4, it is characterised in that：Further include monitoring guest machine (2), Server (3) and audible-visual annunciator (5), it is described monitoring guest machine (2) be connected with the server (3), the server (3) and The audible-visual annunciator (5) is connected.
- A kind of 6. coal mine gas injecting system according to claim 5, it is characterised in that：Further include multi-channel image processor system (1), the multi-channel image processor system (1) is connected with the monitoring host computer (4).
- A kind of 7. coal mine gas injecting system according to claim 6, it is characterised in that：Further include remote terminal (6), institute Remote terminal (6) is stated with the monitoring host computer (4) to be connected.
- 8. a kind of flow type pump with injection device, it is used in claim 1-7 in a kind of coal mine gas injecting system of any one, and its It is characterized in that, the flow type pump with injection device includes gland component and loudspeaker duct member, and gland component and loudspeaker duct member are collectively formed and drawn Penetrate component, the taper end of loudspeaker duct member is air inlet, the butt end of loudspeaker duct member is gas outlet, on the outside of the taper end of loudspeaker duct member Toroidal cavity is collectively forming with end cap, toroidal cavity is connected by gas access with ambient atmos source, and toroidal cavity is towards loudspeaker Pipe is circlewise provided with multiple through holes, so that toroidal cavity is connected by through hole with the inner cavity of loudspeaker duct member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810009171.9A CN108035767A (en) | 2018-01-04 | 2018-01-04 | Coal mine gas injecting system and for flow type pump with injection device therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810009171.9A CN108035767A (en) | 2018-01-04 | 2018-01-04 | Coal mine gas injecting system and for flow type pump with injection device therein |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108035767A true CN108035767A (en) | 2018-05-15 |
Family
ID=62098479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810009171.9A Pending CN108035767A (en) | 2018-01-04 | 2018-01-04 | Coal mine gas injecting system and for flow type pump with injection device therein |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108035767A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4097218A (en) * | 1976-11-09 | 1978-06-27 | Mobil Oil Corporation | Means and method for controlling excess air inflow |
| CN201596475U (en) * | 2009-12-31 | 2010-10-06 | 煤炭科学研究总院重庆研究院 | Coal mine gas injecting distribution system |
| CN101864985A (en) * | 2010-06-09 | 2010-10-20 | 沈阳邦科实业有限公司 | Gas diluter |
| CN201908689U (en) * | 2010-10-26 | 2011-07-27 | 北京鑫源九鼎科技有限公司 | Linkage warning system for mine gas accident |
| CN202187795U (en) * | 2011-08-23 | 2012-04-11 | 山东理工大学 | Blade spiral-flow type dilution mixer for gas drainage |
| CN203201588U (en) * | 2013-03-29 | 2013-09-18 | 山西正大恒通电气设备有限公司 | Circular seam injecting type gas diluter |
| CN203669920U (en) * | 2013-12-27 | 2014-06-25 | 神华集团有限责任公司 | Gas dilution device and gas dilution system |
| CN204163771U (en) * | 2014-10-16 | 2015-02-18 | 中国矿业大学(北京) | Driving face in coal mine coal and gas prominent warning system |
| CN204511508U (en) * | 2015-03-11 | 2015-07-29 | 杨宏俊 | A kind of gas exceeding limit automatic processing device |
| CN205260071U (en) * | 2015-08-26 | 2016-05-25 | 山西正大恒通科技有限公司 | Injection type gas diluter and be used for drawing and penetrate part wherein |
| CN106907176A (en) * | 2017-05-10 | 2017-06-30 | 杨宏俊 | A kind of coal gas in mine is from dynamic pressure wind dilution device |
| CN207847689U (en) * | 2018-01-04 | 2018-09-11 | 山西正大恒通科技有限公司 | Coal mine gas injecting system and be used for flow type pump with injection device therein |
-
2018
- 2018-01-04 CN CN201810009171.9A patent/CN108035767A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4097218A (en) * | 1976-11-09 | 1978-06-27 | Mobil Oil Corporation | Means and method for controlling excess air inflow |
| CN201596475U (en) * | 2009-12-31 | 2010-10-06 | 煤炭科学研究总院重庆研究院 | Coal mine gas injecting distribution system |
| CN101864985A (en) * | 2010-06-09 | 2010-10-20 | 沈阳邦科实业有限公司 | Gas diluter |
| CN201908689U (en) * | 2010-10-26 | 2011-07-27 | 北京鑫源九鼎科技有限公司 | Linkage warning system for mine gas accident |
| CN202187795U (en) * | 2011-08-23 | 2012-04-11 | 山东理工大学 | Blade spiral-flow type dilution mixer for gas drainage |
| CN203201588U (en) * | 2013-03-29 | 2013-09-18 | 山西正大恒通电气设备有限公司 | Circular seam injecting type gas diluter |
| CN203669920U (en) * | 2013-12-27 | 2014-06-25 | 神华集团有限责任公司 | Gas dilution device and gas dilution system |
| CN204163771U (en) * | 2014-10-16 | 2015-02-18 | 中国矿业大学(北京) | Driving face in coal mine coal and gas prominent warning system |
| CN204511508U (en) * | 2015-03-11 | 2015-07-29 | 杨宏俊 | A kind of gas exceeding limit automatic processing device |
| CN205260071U (en) * | 2015-08-26 | 2016-05-25 | 山西正大恒通科技有限公司 | Injection type gas diluter and be used for drawing and penetrate part wherein |
| CN106907176A (en) * | 2017-05-10 | 2017-06-30 | 杨宏俊 | A kind of coal gas in mine is from dynamic pressure wind dilution device |
| CN207847689U (en) * | 2018-01-04 | 2018-09-11 | 山西正大恒通科技有限公司 | Coal mine gas injecting system and be used for flow type pump with injection device therein |
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