CN203940240U - The quick device of blast prevention of a kind of mine gas pipeline - Google Patents
The quick device of blast prevention of a kind of mine gas pipeline Download PDFInfo
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- CN203940240U CN203940240U CN201420294465.8U CN201420294465U CN203940240U CN 203940240 U CN203940240 U CN 203940240U CN 201420294465 U CN201420294465 U CN 201420294465U CN 203940240 U CN203940240 U CN 203940240U
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Abstract
The utility model provides a kind of mine gas pipeline quick device of blast prevention, comprise flame sensor, pipe pressure sensor, fast controller, electromagnetic starter, D.C. regulated power supply, remote operation backstage and hydraulic station, hydraulic station comprises flame proof ftercompction motor, electro-hydraulic reversing valve, hydraulic accumulating device and quick explosion arrestment valve; In hydraulic accumulating device, be provided with accumulation of energy pressure transducer; Flame sensor, pipe pressure sensor, accumulation of energy pressure transducer, remote operation backstage and electromagnetic starter are all connected with fast controller signal.The utility model adopts the flame sensor Real-Time Monitoring pipeline condition of a fire, and while there is the condition of a fire, in 100 milliseconds, realize fast and cutting off, fast response time, explosion-proof barrier effect is good; Device repeatedly Reusability reduces mining equiment cost; There is manual measuring ability, can effectively anti-locking apparatus ageing failure phenomenon, functional reliability is high, production safety that can effective guarantee mine gas pipeline.
Description
Technical field
The utility model relates to mine safety appliance field, is specifically related to the quick device of blast prevention of a kind of mine gas pipeline.
Background technique
Easily there is the condition of a fire in the conveyance conduit of the conveying flammable explosive gas in mine, once the condition of a fire occurs in somewhere in pipeline, as processed not in time, can cause the blast in whole delivery line and even whole mine.Therefore, mine needs the gas pipeline of the commute generation condition of a fire that fire prevention explosion arrestment facility is set, and the pipeline of the condition of a fire and contacting of other pipelines of mine occur in blocking-up in time when carrying out fireproof monitoring and the condition of a fire occurs, and to reach, the condition of a fire are endangered to the object that reduces to minimum degree.
The safe device of blast prevention of the conveyance conduit of common flammable explosive gas, general gas generator and the mechanical type unidirectional stop valve of adopting, by the quick aerogenesis driving device of gas generator formula unidirectional stop valve, within the extremely short time, turn-off conveyance conduit, to stop the generation of combustion explosion disaster.Another kind of safe device of blast prevention adopts relatively ripe hydraulic pressure fast valve technology, and hydraulic type fast valve is by accumulator to loop voltage supply, and oil hydraulic cylinder, as realize the action of valve as moving cell, adopts selector valve to realize and opens and closes conversion.Be different from general hydrovalve, fast valve is realized quick closedown or the startup of oil cylinder by pilot valve, adopts accumulator to realize the voltage supply of hydraulic circuit.The condition of a fire blast of mine air delivering pipeline is a long-term hidden danger, the condition of a disaster easily send out place may 1 day repeatedly, in the condition of a disaster, being difficult for sending out place may occur 1 time for 1 year and even several years, therefore, desirable safe device of blast prevention should be repeatedly to use, and has real-time monitoring device oneself state function, can easily the state of equipment be tested and be safeguarded.And the current safe device of blast prevention of common gas generator driving device formula unidirectional stop valve, the drawback that existence can only disposable effect, causes user cost too high; And the current safe device of blast prevention of gas generator drive-type and the safe device of blast prevention of hydraulic pressure quick closing valve, all there is the whether aging drawback that can not test of its equipment while not applying, once the pipeline generation condition of a fire, whether device of blast prevention is that upstate is unknowable, therefore has huge potential safety hazard.
Model utility content
The purpose of this utility model is: overcome the deficiencies in the prior art, can be automatically when a kind of use is provided fast explosion arrestment, repeatedly Reusability, possess manual test function and can carry out manual test and the mine gas pipeline quick device of blast prevention of online remote monitoring effectively to prevent that the aging of equipment lost efficacy to hydraulic pressure installation.This device can reduce mining equiment user cost, improves the utilization ratio of equipment, effective guarantee mine air delivering pipeline safety.
The technical solution of the utility model is: the quick device of blast prevention of mine of the present utility model gas pipeline, comprise hydraulic station, and above-mentioned hydraulic station comprises flame proof ftercompction motor, electro-hydraulic reversing valve, hydraulic accumulating device and quick explosion arrestment valve; Flame proof ftercompction motor has power end; Electro-hydraulic reversing valve is provided with control signal input end; Flame proof ftercompction motor and hydraulic accumulating device are in transmission connection; Electro-hydraulic reversing valve is connected with hydraulic accumulating device hydraulic transmission; Explosion arrestment valve is connected with hydraulic accumulating device hydraulic transmission fast; Its structural feature is:
Also comprise flame sensor, pipe pressure sensor, fast controller, electromagnetic starter, D.C. regulated power supply and remote operation backstage; In above-mentioned hydraulic accumulating device, be provided with accumulation of energy pressure transducer; Accumulation of energy pressure transducer is provided with signal output part and power end;
Above-mentioned flame sensor and pipe pressure sensor are respectively equipped with signal output part and power end; Fast controller is provided with flame testing signal input end, pipeline pressure signal input part, communication ends, accumulation of energy pressure signal input end, valve event control signal output terminal, motor on off control signal output part and power end; Electromagnetic starter is provided with control signal input end, power input and power output end; Remote-control operation backstage is provided with communication ends; D.C. regulated power supply is provided with power input and power output end;
The flame testing signal input end of fast controller is electrically connected to the signal output part signal of flame sensor; The pipeline pressure signal input part of fast controller is electrically connected to the signal output part signal of pipe pressure sensor; The communication ends of fast controller is electrically connected to the communication ends two-way signaling on remote-control operation backstage; The accumulation of energy pressure signal input end of fast controller is electrically connected to the signal output part signal of aforesaid accumulation of energy pressure transducer; The control signal input end of electro-hydraulic reversing valve is electrically connected to the valve event control signal output end signal of fast controller; The control signal input end of electromagnetic starter is electrically connected to the motor on off control signal output part signal of fast controller; The power end of flame proof ftercompction motor is electrically connected to the power output end of electromagnetic starter; The power end of the power end of flame sensor, the power end of pipe pressure sensor, fast controller and the power end of accumulation of energy pressure transducer are all electrically connected to the power output end of D.C. regulated power supply; During use, the AC220/380/660V power supply in the external mine of power input of D.C. regulated power supply; The AC380/660V power supply in the external mine of power input of electromagnetic starter.
Further scheme is: above-mentioned fast controller comprises light-coupled isolation load module, single chip processing module, light-coupled isolation output module, communication module, display modular, infrared remote control module, power module and remote controller;
Above-mentioned light-coupled isolation load module is provided with the first to the 3rd signal input part, the first communication ends and second communication end; Single chip processing module is provided with the first communication ends, second communication end, display output terminal, infrared signal input end and signal output part; Light-coupled isolation signal output module is provided with signal input part, the first to the 3rd signal output part; Communication module is provided with internal communication ends and correspondence with foreign country end; Display modular is provided with signal input part; The infrared control module of shaking is provided with signal output part and infrared signal communication ends; Remote controller is provided with infrared signal transmitting terminal; Power module is provided with power input and power output end;
The first signal input end of light-coupled isolation load module is the flame testing signal input end of above-mentioned fast controller; The secondary signal input end of light-coupled isolation load module is the pipeline pressure signal input part of above-mentioned fast controller; The 3rd signal input part of light-coupled isolation load module is the accumulation of energy pressure signal input end of above-mentioned fast controller; The first communication ends of light-coupled isolation load module is the communication ends of above-mentioned fast controller; The second communication end of light-coupled isolation load module is electrically connected to the first communication ends two-way signaling of single chip processing module; The internal communication ends of communication module is electrically connected to the second communication end two-way signaling of single chip processing module; The signal input part of display modular is electrically connected to the display output end signal of single chip processing module; The infrared signal input end of single chip processing module is electrically connected to the infrared signal output part signal that shakes control module; The infrared control infrared signal communication ends of module and the infrared signal transmitting terminal radio communication of remote controller of shaking; The signal input part of light-coupled isolation signal output module is electrically connected to the signal output part signal of single chip processing module; The first signal output terminal of light-coupled isolation signal output module is the valve event control signal output terminal of above-mentioned fast controller; The secondary signal output terminal of light-coupled isolation signal output module is the motor on off control signal output part of above-mentioned fast controller; The 3rd signal output part of light-coupled isolation signal output module is state signal output terminal; Power module provides the working power of controller; During use, the 3rd signal output part of light-coupled isolation signal output module is electrically connected to needing the mine external equipment of signal; The correspondence with foreign country end of communication module is electrically connected to the mine external equipment two-way signaling that needs to communicate by letter.
Further scheme is: above-mentioned flame sensor is GHZ5 Mine-used I. S flame sensor.
Further scheme also has: the communication module of above-mentioned fast controller is RS485 communication module.
The utlity model has positive effect: the quick device of blast prevention of (1) mine of the present utility model gas pipeline, adopt the flame sensor Real-Time Monitoring pipeline condition of a fire, during if any the condition of a fire, flame sensor reaches fast controller by condition of a fire information, fast controller is controlled hydraulic type fast valve and realize quick closedown in 100 millisecond, thoroughly blocks travel of flame, guarantees the safety without fiery bye-pass and main conduit line, system response time is fast, and explosion-proof barrier effect is good.(2) the quick device of blast prevention of mine of the present utility model gas pipeline, adopt hydraulic type fast valve as making moving cell, be installed in protection pipeline, if the shock wave while there is the condition of a fire in pipeline does not produce under the prerequisite of harm to valve body itself, can after eliminating, work in quick closedown, the condition of a fire, realize repeatedly Reusability, effectively promoted the utilization efficiency of equipment, reduce mining equiment cost.(3) the quick device of blast prevention of mine of the present utility model gas pipeline, for the long-term start units age phenomenon that causes device of blast prevention without condition of a fire disaster, be provided with manual measuring ability, while manually detecting, utilize remote-control operation backstage manually to control the open and close of quick explosion arrestment valve, by hydraulic accumulating device, realized the voltage supply of hydraulic circuit, a pressurising can multiple switching valve; Accumulation of energy pressure transducer carries out on-line monitoring to accumulation of energy pressure, controls ftercompction motor during lower than effective fast quick-closing valve pressure carry out automatic compensation when accumulation of energy pressure by fast controller; By manual test pattern is set, can effectively avoid because the problems such as valve corrosion, oil circuit pollution make device of blast prevention lose the problem of quick explosion arrestment function, thereby can significantly improve the functional reliability of device, ensure the production safety of mine gas pipeline.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the circuit structure block diagram of the fast controller in Fig. 1.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
(embodiment 1)
See Fig. 1, the quick device of blast prevention of mine gas pipeline of the present embodiment, is mainly comprised of flame sensor, pipe pressure sensor, fast controller, electromagnetic starter, hydraulic station, D.C. regulated power supply and remote operation backstage.
Hydraulic station is mainly comprised of flame proof ftercompction motor, electro-hydraulic reversing valve, hydraulic accumulating device and quick explosion arrestment valve; In hydraulic accumulating device, be provided with accumulation of energy pressure transducer.Flame proof ftercompction motor has power end; Electro-hydraulic reversing valve is provided with control signal input end; Accumulation of energy pressure transducer is provided with signal output part and power end; Flame proof ftercompction motor and hydraulic accumulating device are in transmission connection; Electro-hydraulic reversing valve is connected with hydraulic accumulating device hydraulic transmission; Explosion arrestment valve is connected with hydraulic accumulating device hydraulic transmission fast.
Flame sensor and pipe pressure sensor are respectively equipped with signal output part and power end; Fast controller is provided with flame testing signal input end, pipeline pressure signal input part, communication ends, accumulation of energy pressure signal input end, valve event control signal output terminal, motor on off control signal output part and power end; Electromagnetic starter is provided with control signal input end, power input and power output end; Remote-control operation backstage is provided with communication ends; D.C. regulated power supply is provided with power input and power output end.
The flame testing signal input end of fast controller is electrically connected to the signal output part signal of flame sensor; The pipeline pressure signal input part of fast controller is electrically connected to the signal output part signal of pipe pressure sensor; The communication ends of fast controller is electrically connected to the communication ends two-way signaling on remote-control operation backstage; The accumulation of energy pressure signal input end of fast controller is electrically connected to the signal output part signal of aforesaid accumulation of energy pressure transducer; The control signal input end of electro-hydraulic reversing valve is electrically connected to the valve event control signal output end signal of fast controller; The control signal input end of electromagnetic starter is electrically connected to the motor on off control signal output part signal of fast controller; The power end of flame proof ftercompction motor is electrically connected to the power output end of electromagnetic starter; The power end of the power end of flame sensor, the power end of pipe pressure sensor, fast controller and the power end of accumulation of energy pressure transducer are all electrically connected to the power output end of D.C. regulated power supply; During use, the AC220/380/660V power supply in the external mine of power input of D.C. regulated power supply; The AC380/660V power supply in the external mine of power input of electromagnetic starter.
See Fig. 2, fast controller is mainly comprised of light-coupled isolation load module, single chip processing module, light-coupled isolation output module, communication module, display modular, infrared remote control module, power module and remote controller.
Light-coupled isolation load module is provided with the first to the 3rd signal input part, the first communication ends and second communication end; Single chip processing module is provided with the first communication ends, second communication end, display output terminal, infrared signal input end and signal output part; Light-coupled isolation signal output module is provided with signal input part, the first to the 3rd signal output part; Communication module is provided with internal communication ends and correspondence with foreign country end; Display modular is provided with signal input part; The infrared control module of shaking is provided with signal output part and infrared signal communication ends; Remote controller is provided with infrared signal transmitting terminal; Power module is provided with power input and power output end.
The first signal input end of light-coupled isolation load module is the flame testing signal input end of aforesaid fast controller; The secondary signal input end of light-coupled isolation load module is the pipeline pressure signal input part of aforesaid fast controller; The 3rd signal input part of light-coupled isolation load module is the accumulation of energy pressure signal input end of aforesaid fast controller; The first communication ends of light-coupled isolation load module is the communication ends of aforesaid fast controller; The second communication end of light-coupled isolation load module is electrically connected to the first communication ends two-way signaling of single chip processing module; The internal communication ends of communication module is electrically connected to the second communication end two-way signaling of single chip processing module; The signal input part of display modular is electrically connected to the display output end signal of single chip processing module; The infrared signal input end of single chip processing module is electrically connected to the infrared signal output part signal that shakes control module; The infrared control infrared signal communication ends of module and the infrared signal transmitting terminal radio communication of remote controller of shaking; The signal input part of light-coupled isolation signal output module is electrically connected to the signal output part signal of single chip processing module; The first signal output terminal of light-coupled isolation signal output module is the valve event control signal output terminal of aforesaid fast controller; The secondary signal output terminal of light-coupled isolation signal output module is the motor on off control signal output part of aforesaid fast controller; The 3rd signal output part of light-coupled isolation signal output module is state signal output terminal; Power module provides the working power of controller; During use, the 3rd signal output part of light-coupled isolation signal output module is electrically connected to needing the mine external equipment of signal; The correspondence with foreign country end of communication module is electrically connected to the mine external equipment two-way signaling that needs to communicate by letter.
In the present embodiment, communication module preferably adopts RS485 communication module; Flame sensor preferably adopts the Mine-used I. S flame sensor of the GHZ5 model of Divine Land, Beijing Guangan Science and Technology Co., Ltd..
(application examples)
The quick device of blast prevention of mine gas pipeline of previous embodiment, its in use, by quick explosion arrestment valve installation, in the pipeline place of needs blocking-up, flame sensor is installed on pipeline hidden danger side.In using process; when flame sensor captures flare up fire; it exports to fast controller by signal; fast controller is exported control signal after processing and is made the quick closedown of quick explosion arrestment valve to hydraulic station; pipeline and other pipelines that the condition of a fire occurs are cut off fast, thereby reach the object that other pipelines of protection are not subject to the pipeline of this generation condition of a fire to affect, disaster is reduced to a minimum.
Do not occurring under the normal state of the pipeline condition of a fire, accumulation of energy pressure transducer detects in real time the hydraulic pressure of hydraulic accumulating device and feeds back to the single chip processing module of fast controller, if oil circuit pressure is lower than normal operating pressure, the single chip processing module of fast controller is sent control signal, control electromagnetic starter and start flame proof ftercompction machine operation, hydraulic accumulating device is carried out to ftercompction, until pressure is when normal, disable motor.
Do not occurring under the normal state of the pipeline condition of a fire, maybe need the quick device of blast prevention of mine gas pipeline that detects previous embodiment whether in normal working, can with remote-control operation backstage, to fast controller, be sent by staff the instruction that opens and closes quick explosion arrestment valve, fast controller is carried out corresponding action according to the instruction on remote-control operation backstage, if explosion arrestment valve performs an action normally fast, illustrate that the quick device of blast prevention of mine gas pipeline of previous embodiment is in effective working state; If it is undesired that quick explosion arrestment valve performs an action, staff can check relevant device in time, get rid of in time corresponding fault, assurance device is all the time in effective working state, thereby while guaranteeing the condition of a fire occurs, the quick device of blast prevention of mine gas pipeline of previous embodiment is in effective working state.
The quick device of blast prevention of mine gas pipeline of previous embodiment, the signal capture judgement time≤5ms of its flame sensor, the reaction time≤20ms of fast controller, hydraulic station quick closing valve action deadline≤90ms; Thereby can complete, there is the pipeline of the condition of a fire and the action of the partition of other pipelines when there is the condition of a fire, effectively ensure Mine Safety in Production in 100 milliseconds.
In sum, the quick device of blast prevention of mine of the present utility model gas pipeline, adopt the flame sensor Real-Time Monitoring pipeline condition of a fire, during if any the condition of a fire, flame sensor reaches fast controller by condition of a fire information, and fast controller is controlled hydraulic type fast valve and realize quick closedown in 100 milliseconds, thoroughly blocking-up travel of flame, guarantee the safety without fiery bye-pass and main conduit line, system response time is fast, and explosion-proof barrier effect is good; Adopt hydraulic type fast valve as making moving cell, be installed in protection pipeline, if the shock wave while there is the condition of a fire in pipeline does not produce under the prerequisite of harm to valve body itself, can after eliminating, work in quick closedown, the condition of a fire, realize repeatedly Reusability, effectively promote the utilization efficiency of equipment, reduced mining equiment cost; For the long-term start units age phenomenon that causes device of blast prevention without condition of a fire disaster, be provided with manual measuring ability, while manually detecting, utilize remote-control operation backstage manually to control the open and close of quick explosion arrestment valve, by hydraulic accumulating device, realized the voltage supply of hydraulic circuit, a pressurising can multiple switching valve; Accumulation of energy pressure transducer carries out on-line monitoring to accumulation of energy pressure, controls ftercompction motor during lower than effective fast quick-closing valve pressure carry out automatic compensation when accumulation of energy pressure by fast controller; By manual test pattern is set, can effectively avoid because the problems such as valve corrosion, oil circuit pollution make device of blast prevention lose the problem of quick explosion arrestment function, thereby can significantly improve the functional reliability of device, ensure the production safety of mine gas pipeline.
Above embodiment and application examples are the explanations to embodiment of the present utility model; but not to restriction of the present utility model; person skilled in the relevant technique is not in the situation that departing from spirit and scope of the present utility model; can also make various conversion and variation and obtain the corresponding technological scheme being equal to, therefore all technological schemes that are equal to all should be included into scope of patent protection of the present utility model.
Claims (4)
1. the quick device of blast prevention of mine gas pipeline, comprises hydraulic station, and described hydraulic station comprises flame proof ftercompction motor, electro-hydraulic reversing valve, hydraulic accumulating device and quick explosion arrestment valve; Flame proof ftercompction motor has power end; Electro-hydraulic reversing valve is provided with control signal input end; Flame proof ftercompction motor and hydraulic accumulating device are in transmission connection; Electro-hydraulic reversing valve is connected with hydraulic accumulating device hydraulic transmission; Explosion arrestment valve is connected with hydraulic accumulating device hydraulic transmission fast; It is characterized in that:
Also comprise flame sensor, pipe pressure sensor, fast controller, electromagnetic starter, D.C. regulated power supply and remote operation backstage; In described hydraulic accumulating device, be provided with accumulation of energy pressure transducer; Accumulation of energy pressure transducer is provided with signal output part and power end;
Described flame sensor and pipe pressure sensor are respectively equipped with signal output part and power end; Fast controller is provided with flame testing signal input end, pipeline pressure signal input part, communication ends, accumulation of energy pressure signal input end, valve event control signal output terminal, motor on off control signal output part and power end; Electromagnetic starter is provided with control signal input end, power input and power output end; Remote-control operation backstage is provided with communication ends; D.C. regulated power supply is provided with power input and power output end;
The flame testing signal input end of fast controller is electrically connected to the signal output part signal of flame sensor; The pipeline pressure signal input part of fast controller is electrically connected to the signal output part signal of pipe pressure sensor; The communication ends of fast controller is electrically connected to the communication ends two-way signaling on remote-control operation backstage; The accumulation of energy pressure signal input end of fast controller is electrically connected to the signal output part signal of aforesaid accumulation of energy pressure transducer; The control signal input end of electro-hydraulic reversing valve is electrically connected to the valve event control signal output end signal of fast controller; The control signal input end of electromagnetic starter is electrically connected to the motor on off control signal output part signal of fast controller; The power end of flame proof ftercompction motor is electrically connected to the power output end of electromagnetic starter; The power end of the power end of flame sensor, the power end of pipe pressure sensor, fast controller and the power end of accumulation of energy pressure transducer are all electrically connected to the power output end of D.C. regulated power supply; During use, the AC220/380/660V power supply in the external mine of power input of D.C. regulated power supply; The AC380/660V power supply in the external mine of power input of electromagnetic starter.
2. the quick device of blast prevention of mine according to claim 1 gas pipeline, is characterized in that: described fast controller comprises light-coupled isolation load module, single chip processing module, light-coupled isolation output module, communication module, display modular, infrared remote control module, power module and remote controller;
Described light-coupled isolation load module is provided with the first to the 3rd signal input part, the first communication ends and second communication end; Single chip processing module is provided with the first communication ends, second communication end, display output terminal, infrared signal input end and signal output part; Light-coupled isolation signal output module is provided with signal input part, the first to the 3rd signal output part; Communication module is provided with internal communication ends and correspondence with foreign country end; Display modular is provided with signal input part; The infrared control module of shaking is provided with signal output part and infrared signal communication ends; Remote controller is provided with infrared signal transmitting terminal; Power module is provided with power input and power output end;
The first signal input end of light-coupled isolation load module is the flame testing signal input end of described fast controller; The secondary signal input end of light-coupled isolation load module is the pipeline pressure signal input part of described fast controller; The 3rd signal input part of light-coupled isolation load module is the accumulation of energy pressure signal input end of described fast controller; The first communication ends of light-coupled isolation load module is the communication ends of described fast controller; The second communication end of light-coupled isolation load module is electrically connected to the first communication ends two-way signaling of single chip processing module; The internal communication ends of communication module is electrically connected to the second communication end two-way signaling of single chip processing module; The signal input part of display modular is electrically connected to the display output end signal of single chip processing module; The infrared signal input end of single chip processing module is electrically connected to the infrared signal output part signal that shakes control module; The infrared control infrared signal communication ends of module and the infrared signal transmitting terminal radio communication of remote controller of shaking; The signal input part of light-coupled isolation signal output module is electrically connected to the signal output part signal of single chip processing module; The first signal output terminal of light-coupled isolation signal output module is the valve event control signal output terminal of described fast controller; The secondary signal output terminal of light-coupled isolation signal output module is the motor on off control signal output part of described fast controller; The 3rd signal output part of light-coupled isolation signal output module is state signal output terminal; Power module provides the working power of controller; During use, the 3rd signal output part of light-coupled isolation signal output module is electrically connected to needing the mine external equipment of signal; The correspondence with foreign country end of communication module is electrically connected to the mine external equipment two-way signaling that needs to communicate by letter.
3. the quick device of blast prevention of mine according to claim 1 gas pipeline, is characterized in that: described flame sensor is GHZ5 Mine-used I. S flame sensor.
4. the quick device of blast prevention of mine according to claim 2 gas pipeline, is characterized in that: the communication module of described fast controller is RS485 communication module.
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| CN201420294465.8U CN203940240U (en) | 2014-06-04 | 2014-06-04 | The quick device of blast prevention of a kind of mine gas pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482413A (en) * | 2014-12-19 | 2015-04-01 | 中煤科工集团重庆研究院有限公司 | Mining gas pipeline explosion signal monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482413A (en) * | 2014-12-19 | 2015-04-01 | 中煤科工集团重庆研究院有限公司 | Mining gas pipeline explosion signal monitoring device |
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Granted publication date: 20141112 Termination date: 20170604 |