CN104507221B - Combined mining anti-explosion and intrinsic safety type tunnel lamp - Google Patents
Combined mining anti-explosion and intrinsic safety type tunnel lamp Download PDFInfo
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- CN104507221B CN104507221B CN201410780326.0A CN201410780326A CN104507221B CN 104507221 B CN104507221 B CN 104507221B CN 201410780326 A CN201410780326 A CN 201410780326A CN 104507221 B CN104507221 B CN 104507221B
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Abstract
The invention relates to an anti-explosion tunnel lamp mounted in a mining tunnel and specifically relates to a combined mining anti-explosion and intrinsic safety type tunnel lamp. The combined mining anti-explosion and intrinsic safety type tunnel lamp comprises an anti-explosion shell, wherein an LED (Light Emitting Diode) light source is arranged on the anti-explosion shell; a power supply controller and an LED light source driver are arranged in the anti-explosion shell; the LED light source driver comprises an input port P1, a first output port P2 and a driving chip U1 in KA7500B type; the input port P1 is connected with an output end of the power supply controller; the first output port P2 is connected with the LED light source through an overvoltage over-current locking protecting circuit. The invention provides the combined mining anti-explosion and intrinsic safety type tunnel lamp; a driving circuit mounted in the tunnel lamp has the functions of current feedback, voltage feedback and overvoltage over-current locking protection, so that the voltage and the current outputted by the driving circuit are constant; the tunnel lamp also can be used for supplying power to a surrounding personnel location system and a surrounding safety monitoring inspecting system, so that the technical demand of the mining tunnel on the tunnel lamp is met.
Description
Technical field
The present invention relates to the explosion-proof type tunnel lamp installed in coal mine roadway, specially Combined mine explosion-proof intrinsically safe lane
Road lamp.
Background technology
The tunnel lamp installed in tunnel on colliery generally is explosion-proof type tunnel lamp, and existing explosion-proof type tunnel lamp exists such as
Lower deficiency: be the first, that tunnel lamp housing has carried out flame proof design, and tunnel lamp drive circuit is not set using essential safety
Meter, so case material and processing request are higher；Secondth, enclosure interior is not provided with power supply output it is impossible to be the personnel of periphery
Alignment system and Safety monitoring system power supply.
Content of the invention
The present invention can not meet coal mine roadway to illumination equipment and technology requirement to solve existing explosion-proof type tunnel lamp
Problem, there is provided Combined mine explosion-proof intrinsically safe tunnel lamp.、
The present invention adopts the following technical scheme that realization: Combined mine explosion-proof intrinsically safe tunnel lamp, including anti-
Quick-fried housing, explosion-proof casing is provided with LED light source, is provided with power-supply controller of electric and LED light source driver, LED light source in explosion-proof casing
Driver includes input port p1, the first output port p2 and model ka7500b, inside is written with the drive of voltage comparison program
Dynamic chip u1, input port p1 the 2nd pin ground connection, the 1st pin pass through the 8th electric capacity c8 ground connection, the 1st pin also with pnp tri- pole
The emitter stage of pipe q3 connects, and is also associated with the 30th resistance r30, pnp triode between the emitter stage of pnp triode q3 and base stage
The negative pole of the colelctor electrode of q3 and voltage-stabiliser tube zd1 connects, the plus earth of voltage-stabiliser tube zd1, and colelctor electrode is also by the electricity being sequentially connected
1st pin of sense l1 and the 32nd resistance r32 and the first output port p2 connects, and the 2nd pin of the first output port p2 connects
Ground, the 1st pin of the first output port p2 passes through the 9th electric capacity c9 ground connection, also by the 34th resistance r34 being sequentially connected
It is grounded with the 41st resistance r41, the 32nd resistance r32 two ends are also parallel with the 33rd resistance r33, driving chip u1's
1st pin passes through the 39th resistance r39 ground connection, is connected to inductance l1 and the 32nd electricity also by the 37th resistance r37
Between resistance r32, the 2nd pin passes through the 13rd electric capacity c13 and the 3rd pin and connects, the 2nd pin pass through the 38th resistance r38 and
1st pin of the first output port p2 connects, also by the 40th resistance r40 being sequentially connected, the 29th resistance r29 and the
Ten electric capacity c10 ground connection, the 3rd pin passes through the 12nd electric capacity c12 and the 15th pin connects, and the 4th pin passes through the 35th resistance
R35 is grounded, and the 5th pin passes through the 14th electric capacity c14 ground connection, and the 6th pin passes through the 36th resistance r36 and is grounded, the 7th pin,
9th pin, the 10th pin and the 13rd pin are all grounded, and the 8th pin and the 11st pin connect, and the 11st pin passes through the 31st electricity
The base stage of resistance r31 and pnp triode q3 connects, and the 12nd pin and pnp triode q3 emitter stage connect, and the 14th pin is connected to the
Between 40 resistance r40 and the 29th resistance r29, the 15th pin be connected to the 29th resistance r29 and the tenth electric capacity c10 it
Between, the 16th pin passes through the 41st resistance r41 ground connection, also by the 1st of the 34th resistance r34 and the first output port p2 the
Pin connects；The terminals of the output end of power-supply controller of electric and input port p1 connect, the terminals of the first output port p2 and
LED light source connects.
During work, the input of power-supply controller of electric and external ac power source connect, and power-supply controller of electric is by external ac power source
Be converted to internal supply voltage, internal supply voltage is inputted by input port p1, the first output port p2 output supply voltage is given
LED light source, driving chip u1 can be controlled to internal circuit, makes the first output port p2 output constant voltage/constant current, driving chip
U1 includes current feedback and Voltage Feedback, and the positive pole of current feedback and negative pole correspond to the 1st pin and the 2nd of driving chip u1 respectively
Pin, the electric current that pnp triode q3 colelctor electrode flows out flows through the 32nd resistance r32 and the 33rd resistance r33, and the 32nd
Voltage drop is produced, this voltage drop is through the 37th resistance r37, the 39th resistance on resistance r32 and the 33rd resistance r33
R39 and the 38th r38, the 40th resistance r40 feed back to the 1st pin and the 2nd pin of driving chip u1, when the electricity of 1 pin
When pressure is more than the voltage of the 2nd pin, the 8th pin of driving chip u1 and the 11st pin reduce output pulse width, make pnp triode q3
The electric current that colelctor electrode flows out reduces, when the voltage of 1 pin is less than the voltage of the 2nd pin, the 8th pin of driving chip u1 and the
11 pins increase output pulse width, so that the electric current that pnp triode q3 colelctor electrode flows out is increased；The positive pole of Voltage Feedback and negative pole are respectively
16th pin of corresponding driving chip u1 and the 15th pin, after the 12nd pin input voltage of driving chip u1, the 14th pin meeting
Output reference voltage, the voltage of the 16th pin is the voltage at the 41st resistance r41 two ends, when reference voltage is less than the 16th pin
Voltage when, the 8th pin of driving chip u1 and the 11st pin reduce output pulse width, when reference voltage is more than the electricity of the 16th pin
During pressure, the 8th pin of driving chip u1 and the 11st pin increase output pulse width, and such driving chip u1 passes through current feedback and electricity
Pressure feedback make first output port p2 output constant voltage/constant current, the first output port p2 also can with tunnel in personnel location system
And Safety monitoring system connects, it is personnel location system and Safety monitoring system power supply.
Combinations of the above formula mine anti-explosion intrinsically safe tunnel lamp, the terminals of the first output port p2 and LED light source are even
It is connected to over-voltage and over-current latch-up protection circuit, over-voltage and over-current latch-up protection circuit includes the power switch u2 of model ao4405, ratio
Compared with the voltage-stablizer zd2 of device u5a, current amplifier u5b and model tl431aclp, the positive terminals of the first output port p2 lead to
Cross the second electric capacity c2 ground connection, the 3rd pin that positive terminals pass through the 14th resistance r14 and voltage-stablizer zd2 connects, also by successively
The 19th resistance r19 connecting and the 20th resistance r20 ground connection, the 1st pin of voltage-stablizer zd2 and the 3rd pin connect, the 3rd pipe
The 2nd pin that pin passes through the 15th resistance r15 being sequentially connected and the 16th resistance r16 and voltage-stablizer zd2 connects, the 2nd pin
Ground connection, the negative pole of the inverting input of comparator u5a and the 3rd crystal diode d3 connects, the positive pole of the 3rd crystal diode d3
It is connected between the 19th resistance r19 and the 20th resistance r20, inverting input passes through the 21st resistance r21 ground connection, anti-phase
It is connected with the 7th electric capacity c7, in-phase input end is connected to the 15th resistance r15 and the 16th resistance between input and output end
Between r16, the output end of comparator u5a is connected by the base stage of the 23rd resistance r23 and pnp triode q2, pnp triode
The grounded emitter of q2, the positive terminals that colelctor electrode passes through the 22nd resistance r22 and the first output port p2 connect, colelctor electrode
Positive pole connection, the negative pole of the second crystal diode d2 and the inverting input of comparator u5a of also with the second crystal diode d2
Connect, colelctor electrode also connects with the 4th pin of power switch u2, and the 1st pin of power switch u2, the 2nd pin and the 3rd pin are all
With the positive terminals of the first output port p2, the 5th pin, the 6th pin, the 7th pin and the 8th pin all with the second output port p3
The 1st pin connect, the 2nd pin of the second output port p3 the 27th resistance r27 in parallel and the 28th resistance
R28 is grounded, and the 2nd pin connects also by the inverting input of the 25th resistance r25 and current amplifier u5b, Current amplifier
The inverting input of device u5b passes through the 24th resistance r24 and output end connects, and in-phase input end passes through the 26th resistance
R26 is grounded, and output end is connected by the positive pole of the 18th resistance r18 and the 4th crystal diode d4, the 4th crystal diode d4
Negative pole and the inverting input of comparator u5a connect, the positive pole of the 4th crystal diode d4 connects also by the 17th resistance r17
Ground；Voltage-stablizer zd2 provides baseline threshold, the input electricity of the inverting input of comparator u5a to the in-phase input end of comparator u5a
Press the partial pressure on the 20th resistance r20 for the voltage for the first output port p2 output, when anti-phase input terminal voltage is higher than homophase
During the baseline threshold of input, comparator u5a exports low level, and pnp triode q2 ends, and power switch u2 ends, and exports back
Road is cut off, and the voltage of the first output port p2 output passes through the second crystal diode d2 simultaneously, promotes comparator u5a output electricity
Flat drop-down for low level, realize latching process.
Combinations of the above formula mine anti-explosion intrinsically safe tunnel lamp, described explosion-proof casing inner space is divided into led driving plate
Chamber, intrinsic safety electric source chamber and power supply wiring chamber, place power-supply controller of electric in power supply wiring cavity, place led light in led driving plate chamber
Source component, places LED light source driver in intrinsic safety electric source chamber.
The invention provides a kind of explosion-proof intrinsically safe tunnel lamp of Combined mine, the drive circuit tool within this tunnel lamp
There are current feedback, Voltage Feedback and over-voltage and over-current latch-up protection effect so that the voltage x current of drive circuit output is constant, this lane
Road lamp can be also the personnel location system of periphery and Safety monitoring system power supply, has reached coal mine roadway to tunnel lamp
Technical requirements.
Brief description
Fig. 1 is the circuit theory diagrams of LED light source driver.
Fig. 2 is the circuit theory diagrams of over-voltage and over-current latch-up protection circuit.
Specific embodiment
Combined mine explosion-proof intrinsically safe tunnel lamp, including explosion-proof casing, explosion-proof casing is provided with LED light source, explosion-proof
It is provided with power-supply controller of electric and LED light source driver, LED light source driver includes input port p1, the first output port in housing
P2 and model ka7500b, the internal driving chip u1 being written with voltage comparison program, the 2nd pin ground connection of input port p1,
1st pin passes through the 8th electric capacity c8 ground connection, and the 1st pin also connects with the emitter stage of pnp triode q3, and pnp triode q3 sends out
It is also associated with the 30th resistance r30, the negative pole of the colelctor electrode of pnp triode q3 and voltage-stabiliser tube zd1 connects between emitter-base bandgap grading and base stage,
The plus earth of voltage-stabiliser tube zd1, colelctor electrode is also by the inductance l1 being sequentially connected and the 32nd resistance r32 and the first output end
1st pin of mouth p2 connects, the 2nd pin ground connection of the first output port p2, and the 1st pin of the first output port p2 passes through the 9th
Electric capacity c9 is grounded, also by the 34th resistance r34 being sequentially connected and the 41st resistance r41 ground connection, the 32nd resistance
R32 two ends are also parallel with the 33rd resistance r33, and the 1st pin of driving chip u1 passes through the 39th resistance r39 ground connection, also
It is connected between inductance l1 and the 32nd resistance r32 by the 37th resistance r37, the 2nd pin passes through the 13rd electric capacity c13
Connect with the 3rd pin, the 1st pin that the 2nd pin passes through the 38th resistance r38 and the first output port p2 connects, also by
The 40th resistance r40, the 29th resistance r29 that are sequentially connected and the tenth electric capacity c10 ground connection, the 3rd pin passes through the 12nd electricity
Hold c12 and the 15th pin connects, the 4th pin passes through the 35th resistance r35 ground connection, the 5th pin is connect by the 14th electric capacity c14
Ground, the 6th pin passes through the 36th resistance r36 ground connection, and the 7th pin, the 9th pin, the 10th pin and the 13rd pin are all grounded, the
8 pins and the 11st pin connect, and the 11st pin is connected by the base stage of the 31st resistance r31 and pnp triode q3, the 12nd pipe
Pin and pnp triode q3 emitter stage connect, and the 14th pin is connected between the 40th resistance r40 and the 29th resistance r29, the
15 pins are connected between the 29th resistance r29 and the tenth electric capacity c10, and the 16th pin passes through the 41st resistance r41 ground connection,
The 1st pin also by the 34th resistance r34 and the first output port p2 connects；The output end of power-supply controller of electric and input
The terminals of mouth p1 connect, and the terminals of the first output port p2 and LED light source connect.
Combinations of the above formula mine anti-explosion intrinsically safe tunnel lamp, the terminals of the first output port p2 and LED light source are even
It is connected to over-voltage and over-current latch-up protection circuit, over-voltage and over-current latch-up protection circuit includes the power switch u2 of model ao4405, ratio
Compared with the voltage-stablizer zd2 of device u5a, current amplifier u5b and model tl431aclp, the positive terminals of the first output port p2 lead to
Cross the second electric capacity c2 ground connection, the 3rd pin that positive terminals pass through the 14th resistance r14 and voltage-stablizer zd2 connects, also by successively
The 19th resistance r19 connecting and the 20th resistance r20 ground connection, the 1st pin of voltage-stablizer zd2 and the 3rd pin connect, the 3rd pipe
The 2nd pin that pin passes through the 15th resistance r15 being sequentially connected and the 16th resistance r16 and voltage-stablizer zd2 connects, the 2nd pin
Ground connection, the negative pole of the inverting input of comparator u5a and the 3rd crystal diode d3 connects, the positive pole of the 3rd crystal diode d3
It is connected between the 19th resistance r19 and the 20th resistance r20, inverting input passes through the 21st resistance r21 ground connection, anti-phase
It is connected with the 7th electric capacity c7, in-phase input end is connected to the 15th resistance r15 and the 16th resistance between input and output end
Between r16, the output end of comparator u5a is connected by the base stage of the 23rd resistance r23 and pnp triode q2, pnp triode
The grounded emitter of q2, the positive terminals that colelctor electrode passes through the 22nd resistance r22 and the first output port p2 connect, colelctor electrode
Positive pole connection, the negative pole of the second crystal diode d2 and the inverting input of comparator u5a of also with the second crystal diode d2
Connect, colelctor electrode also connects with the 4th pin of power switch u2, and the 1st pin of power switch u2, the 2nd pin and the 3rd pin are all
With the positive terminals of the first output port p2, the 5th pin, the 6th pin, the 7th pin and the 8th pin all with the second output port p3
The 1st pin connect, the 2nd pin of the second output port p3 the 27th resistance r27 in parallel and the 28th resistance
R28 is grounded, and the 2nd pin connects also by the inverting input of the 25th resistance r25 and current amplifier u5b, Current amplifier
The inverting input of device u5b passes through the 24th resistance r24 and output end connects, and in-phase input end passes through the 26th resistance
R26 is grounded, and output end is connected by the positive pole of the 18th resistance r18 and the 4th crystal diode d4, the 4th crystal diode d4
Negative pole and the inverting input of comparator u5a connect, the positive pole of the 4th crystal diode d4 connects also by the 17th resistance r17
Ground, the terminals of the second output port p3 and LED light source connect.
Combinations of the above formula mine anti-explosion intrinsically safe tunnel lamp, described explosion-proof casing inner space is divided into led driving plate
Chamber, intrinsic safety electric source chamber and power supply wiring chamber, place power-supply controller of electric in power supply wiring cavity, place led light in led driving plate chamber
Source component, places LED light source driver in intrinsic safety electric source chamber.
Claims (3)
1. Combined mine explosion-proof intrinsically safe tunnel lamp, including explosion-proof casing, explosion-proof casing is provided with LED light source, explosion-proof shell
Be provided with power-supply controller of electric and LED light source driver in vivo it is characterised in that LED light source driver include input port p1, first
Output port p2 and model ka7500b, the internal driving chip u1 being written with voltage comparison program, the 2nd of input port p1 the
Pin is grounded, and the 1st pin passes through the 8th electric capacity c8 ground connection, and the 1st pin also connects with the emitter stage of pnp triode q3, pnp tri- pole
It is also associated with the 30th resistance r30 between the emitter stage of pipe q3 and base stage, the colelctor electrode of pnp triode q3 and voltage-stabiliser tube zd1's
Negative pole connects, the plus earth of voltage-stabiliser tube zd1, colelctor electrode also by the inductance l1 being sequentially connected and the 32nd resistance r32 and
1st pin of the first output port p2 connects, the 2nd pin ground connection of the first output port p2, the 1st pipe of the first output port p2
Pin passes through the 9th electric capacity c9 ground connection, also by the 34th resistance r34 being sequentially connected and the 41st resistance r41 ground connection, the
32 resistance r32 two ends are also parallel with the 33rd resistance r33, and the 1st pin of driving chip u1 passes through the 39th resistance
R39 is grounded, and is connected between inductance l1 and the 32nd resistance r32 also by the 37th resistance r37, and the 2nd pin passes through the
13 electric capacity c13 and the 3rd pin connect, and the 2nd pin passes through the 1st pin of the 38th resistance r38 and the first output port p2
Connect, also by the 40th resistance r40, the 29th resistance r29 being sequentially connected and the tenth electric capacity c10 ground connection, the 3rd pin leads to
Cross the 12nd electric capacity c12 and the 15th pin connects, the 4th pin passes through the 35th resistance r35 ground connection, the 5th pin passes through the tenth
Four electric capacity c14 ground connection, the 6th pin passes through the 36th resistance r36 ground connection, the 7th pin, the 9th pin, the 10th pin and the 13rd pipe
Pin is all grounded, and the 8th pin and the 11st pin connect, and the 11st pin passes through the base stage of the 31st resistance r31 and pnp triode q3
Connect, the 12nd pin and pnp triode q3 emitter stage connect, the 14th pin is connected to the 40th resistance r40 and the 29th electricity
Between resistance r29, the 15th pin is connected between the 29th resistance r29 and the tenth electric capacity c10, and the 16th pin passes through the 41st
Resistance r41 is grounded, and the 1st pin also by the 34th resistance r34 and the first output port p2 connects；Power-supply controller of electric defeated
Go out end and the terminals of input port p1 connect, the terminals of the first output port p2 and LED light source connect.
2. the explosion-proof intrinsically safe tunnel lamp of Combined mine according to claim 1 is it is characterised in that the first output port
The terminals of p2 and LED light source are connected with over-voltage and over-current latch-up protection circuit, and over-voltage and over-current latch-up protection circuit includes model
The power switch u2 of ao4405, the voltage-stablizer zd2 of comparator u5a, current amplifier u5b and model tl431aclp, first is defeated
The positive terminals of exit port p2 pass through the second electric capacity c2 ground connection, and positive terminals pass through the of the 14th resistance r14 and voltage-stablizer zd2
3 pins connect, also by the 19th resistance r19 being sequentially connected and the 20th resistance r20 ground connection, the 1st pin of voltage-stablizer zd2
Connect with the 3rd pin, the 3rd pin passes through the 15th resistance r15's being sequentially connected and the 16th resistance r16 and voltage-stablizer zd2
2nd pin connects, the 2nd pin ground connection, and the negative pole of the inverting input of comparator u5a and the 3rd crystal diode d3 connects, the
The positive pole of three crystal diode d3 is connected between the 19th resistance r19 and the 20th resistance r20, and inverting input passes through second
11 resistance r21 ground connection, are connected with the 7th electric capacity c7, in-phase input end is connected to the 15th between inverting input and output end
Between resistance r15 and the 16th resistance r16, the output end of comparator u5a passes through the 23rd resistance r23 and pnp triode q2
Base stage connect, the grounded emitter of pnp triode q2, colelctor electrode pass through the 22nd resistance r22 and the first output port p2
Positive terminals connect, the positive pole of colelctor electrode also with the second crystal diode d2 connects, the negative pole of the second crystal diode d2 and
The inverting input of comparator u5a connects, and colelctor electrode also connects with the 4th pin of power switch u2, the 1st pipe of power switch u2
The positive terminals of pin, the 2nd pin and the 3rd pin all with the first output port p2, the 5th pin, the 6th pin, the 7th pin and the 8th
1st pin of pin all with the second output port p3 connects, the 2nd pin of the second output port p3 in parallel the 27th
Resistance r27 and the 28th resistance r28 ground connection, the 2nd pin is anti-also by the 25th resistance r25 and current amplifier u5b
Phase input connects, and the inverting input of current amplifier u5b passes through the 24th resistance r24 and output end connects, and homophase is defeated
Enter end by the 26th resistance r26 ground connection, output end is by the positive pole of the 18th resistance r18 and the 4th crystal diode d4 even
Connect, the inverting input of the negative pole of the 4th crystal diode d4 and comparator u5a connects, and the positive pole of the 4th crystal diode d4 is also
It is grounded by the 17th resistance r17, the terminals of the second output port p3 and LED light source connect.
3. the explosion-proof intrinsically safe tunnel lamp of Combined mine according to claim 2 is it is characterised in that inside explosion-proof casing
Space is divided into led driving plate chamber, intrinsic safety electric source chamber and power supply wiring chamber, places power-supply controller of electric in power supply wiring cavity, and led drives
LED light source driver is placed in dynamic plate chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410780326.0A CN104507221B (en) | 2014-12-17 | 2014-12-17 | Combined mining anti-explosion and intrinsic safety type tunnel lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410780326.0A CN104507221B (en) | 2014-12-17 | 2014-12-17 | Combined mining anti-explosion and intrinsic safety type tunnel lamp |
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| CN104507221A CN104507221A (en) | 2015-04-08 |
| CN104507221B true CN104507221B (en) | 2017-01-18 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3187779A1 (en) * | 2015-12-30 | 2017-07-05 | Bomar S.A. w upadlosci ukladowej | Explosion proof power supply unit for underground mines |
| CN106982502A (en) * | 2017-04-21 | 2017-07-25 | 山东华鼎伟业能源科技股份有限公司 | Intelligently realizing explosion-proof illuminator and its control method with automatic sensing function |
| CN108988309B (en) * | 2018-08-20 | 2023-08-29 | 大同裕隆环保有限责任公司 | Intrinsic safety type electric spark suppression circuit |
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| EP2480859B1 (en) * | 2009-09-22 | 2018-07-18 | Laser Mechanisms, Inc. | Fast response capacitive sensing system featuring steep slope filter discrimination circuit |
| CN202182376U (en) * | 2011-06-30 | 2012-04-04 | 海洋王照明科技股份有限公司 | Tunnel lamp for coal mine |
| KR20130066220A (en) * | 2011-12-12 | 2013-06-20 | (유)디에스이지휴먼텍 | Tention-relexing type winch |
| CN202998574U (en) * | 2012-11-30 | 2013-06-12 | 大同裕隆环保有限责任公司 | Energy-saving LED mining explosion-suppression-type tunnel lamp |
| CN204259246U (en) * | 2014-12-17 | 2015-04-08 | 大同裕隆环保有限责任公司 | The explosion-proof intrinsically safe tunnel lamp of Combined mine |
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Address after: 037024 No. 5, Yanxin street community, Yongdingzhuang street, Yungang District, Datong City, Shanxi Province Patentee after: DATONG YULONG ENVIRONMENTAL PROTECTION Co.,Ltd. Address before: 037041 No. 1, Hongguang street, Meiyukou, mining area, Datong City, Shanxi Province Patentee before: DATONG YULONG ENVIRONMENTAL PROTECTION Co.,Ltd. |
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