CN209780862U - Online accurate measurement and control device for angle of drilling machine - Google Patents
Online accurate measurement and control device for angle of drilling machine Download PDFInfo
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- CN209780862U CN209780862U CN201920208654.1U CN201920208654U CN209780862U CN 209780862 U CN209780862 U CN 209780862U CN 201920208654 U CN201920208654 U CN 201920208654U CN 209780862 U CN209780862 U CN 209780862U
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Abstract
The utility model relates to an on-line accurate measurement and control device for drilling machine angles, which comprises a display screen, a drilling machine body and a parameter measurement sensor device; the parameter measuring sensor device is arranged on each working mechanism of the drilling machine body; the parameter measuring sensor device is connected with the display screen through a cable; the parameter measurement sensor device comprises any one or combination of the following components: the device comprises an inclination angle sensor, an azimuth angle sensor, a roll pitch angle sensor, a temperature sensor, a pressure sensor, a rotating speed sensor and a displacement sensor. Its advantages are: the utility model discloses an online accurate measurement and control device of rig angle and method can realize quick trompil to can quick accurate measurement and angle of adjustment, the security is good, and drilling efficiency is high, the cost of using manpower sparingly.
Description
Technical Field
The utility model belongs to the technical field of the rig angle technique and specifically relates to an online accurate measurement and control device of rig angle and method.
Background
Along with the rapid development of economic construction, the technical field of engineering machinery makes remarkable progress, wherein a drilling machine is mechanical equipment for driving a drilling tool to drill in any direction to obtain real geological data in geological exploration. For example, in the process of underground coal mining, because coal seam occurrence conditions are complex and changeable, and major gas accidents often occur, in order to prevent local gas safety accidents of coal mines and achieve effective gas extraction and utilization, a drainage drilling machine is used for drilling a detection hole before excavation, and gas under a mine is detected, released and utilized, so that gas explosion accidents are avoided.
However, the drilling machine used for coal mine underground gas treatment drilling in the prior art has the following defects and deficiencies:
Firstly, the underground gas control drilling engineering of coal mines is huge every year in China, almost all coal mines adopt the traditional manual measuring method to calibrate the inclination angle and the azimuth angle at present, the operation procedure is quite complicated, the drilling stabilizing time is long, and the precision is low. That is, how to rapidly and accurately monitor and control the inclination angle and the azimuth angle of the opening becomes a problem to be solved in the field.
Secondly, when the drilling machine is operated, the drilling machine is often overturned due to overlarge gradient because the parameters such as the gradient of the mine ground are unclear; the inaccurate control of the oil temperature and the system pressure of the hydraulic system causes judgment errors, and an accurate monitoring system is urgently needed for a driller to make accurate judgment in the drilling operation.
chinese patent document CN201510911421.4, application date 20151211, with patent names: the utility model provides a from variable angle gas rig of walking, discloses a from variable angle gas rig of walking, belongs to colliery underground equipment, and the gas rig chassis is provided with the track, and the track tip is provided with chassis lifting support, is provided with rig head lift cylinder above the rig chassis, and rig head bottom periphery is provided with a plurality of staple bolts, and chassis lift cylinder and rig head lift cylinder all are connected with hydraulic means.
The self-walking variable-angle gas drilling machine disclosed in the patent document avoids the use of special lifting equipment occupying a large area in the gas drilling process, is provided with a mobile walking device, and can improve or reduce the height of the drilling machine and improve the convenience of the gas drilling machine by arranging the lifting device. However, a technical scheme that can rapidly and accurately measure the inclination angle and the azimuth angle of the borehole and simultaneously facilitate accurate judgment of various parameters is not disclosed.
In view of the above, there is a need for a measurement and control device capable of opening a hole quickly and measuring and adjusting an angle quickly and accurately, and no report on the measurement and control device is found at present.
disclosure of Invention
The utility model aims at providing a not enough among the prior art, provide one kind and can trompil fast to can quick accurate measurement and angle of adjustment's measurement and control device.
the utility model discloses a still another purpose provides a rig online measurement and control device.
Another object of the present invention is to provide a measuring method of the online accurate measurement and control device for drilling machine angle.
In order to achieve the purpose, the utility model adopts the technical proposal that:
A drilling machine angle on-line accurate measurement and control device comprises a display screen, a drilling machine body and a parameter measurement sensor device; the parameter measuring sensor device is arranged on each working mechanism of the drilling machine body; the parameter measuring sensor device is connected with the display screen through a cable; the parameter measurement sensor device comprises any one or combination of the following components: the device comprises an inclination angle sensor, an azimuth angle sensor, a roll pitch angle sensor, a temperature sensor, a pressure sensor, a rotating speed sensor and a displacement sensor;
The inclination angle sensor is used for measuring the inclination angle of the drill hole; the azimuth angle sensor is used for measuring the azimuth angle of the drilling hole; the roll pitching sensor is used for measuring a roll angle and a pitching angle of the drilling machine; the temperature sensor is used for measuring the oil temperature of the hydraulic system; the pressure sensor is used for measuring the pressure of the hydraulic system; the rotating speed sensor is used for measuring the output rotating speed of the power head; and the displacement sensor is used for measuring the displacement of the power head.
As a preferred technical scheme, the display screen, the inclination angle sensor, the azimuth angle sensor, the roll pitch angle sensor, the temperature sensor and the pressure sensor are all devices protected by an intrinsically safe i-shaped protective device or a flameproof housing d-shaped protective device.
As a preferable technical scheme, the inclination angle sensor is arranged on a drill boom of the drilling machine body and used for converting inclination angle signals of the drill boom into electric signals.
as a preferred technical scheme, the measurement and control device further comprises a power supply, wherein the power supply can be an external input power supply, a built-in power battery or a built-in rechargeable storage battery.
As a preferred technical scheme, the azimuth angle sensor is arranged on a drill boom on the drilling machine body, or the azimuth angle sensor is arranged at any position of a rotating part of a lower gyrator of the drilling machine body; the azimuth angle signal of the drill boom is converted into an electrical signal.
As a preferable technical scheme, the cable is a mining cable.
In order to achieve the second objective, the utility model adopts the following technical scheme:
An online measurement and control device of a drilling machine comprises a walking mechanism; a working platform is arranged on the travelling mechanism; an operating platform is arranged at one end of the working platform; a display screen is arranged on the operating platform; an oil tank is arranged on one side of the operating platform; the other end of the working platform is provided with a drill boom; the drill boom is provided with a power head; the measurement and control device is also provided with a base, wherein the base comprises a lower gyrator, a lifting oil cylinder, a sliding bearing seat, an upper gyrator and a supporting oil cylinder; the sliding bearing seat is arranged on the lower gyrator; a lifting oil cylinder and a supporting oil cylinder are arranged in the sliding bearing seat; the number of the supporting oil cylinders is two, and the lifting oil cylinder is arranged between the two supporting oil cylinders; and a rotator is arranged on one side surface of the sliding bearing seat. The lifting oil cylinder drives the sliding bearing seat and the drilling machine host to perform lifting motion, and automatic adjustment of the drilling height is achieved.
as a preferred technical scheme, the operation platform consists of a highly integrated multi-way valve, a pressure gauge and the like, and is integrated with a cooling water interface, a high-pressure water interface and a high-pressure gas interface.
as a preferable technical scheme, the operation table is further provided with a regulation control area, a switching valve and a drilling control area, and drilling and posture regulation are set to be an interlocking safety mode through the switching valve.
In order to realize the third purpose, the utility model adopts the technical scheme that:
A measuring method of a drilling machine angle on-line accurate measurement and control device comprises the following steps:
Step S1, operating the drilling machine to adjust to a target hole position;
S2, firstly, carrying out upper support posture adjustment on the rear end of the drilling machine, and then carrying out upper support on the front end of the drilling machine to adjust the position of the power head;
Step S3, observing various parameters of the parameter measuring sensor device through the display screen to carry out auxiliary operation;
And step S4, adjusting the power head to the posture of the target parameter position, and then performing drilling and pulling operations until drilling is completed.
The utility model has the advantages that:
1. The utility model discloses an online accurate measurement and control device of rig angle and method can realize quick trompil to can quick accurate measurement and angle of adjustment, the security is good, and drilling efficiency is high, the cost of using manpower sparingly.
2. The inclination angle of the drill hole is measured by designing the inclination angle sensor, so that the measurement is accurate, and the problem that the inclination angle of the drill hole is measured by manpower in the traditional technology is solved.
3. The inclination angle sensor and the azimuth angle sensor are used together, so that the position of the drill hole has a positioning effect.
4. Through parameter measurement sensor device, can monitor each item parameter of drilling comprehensively, drilling quality is good, and the security is high, and has improved drilling efficiency.
Drawings
Fig. 1 is a block diagram of the measurement and control device in embodiment 1.
Fig. 2 is a block diagram of the measurement and control device in embodiment 2.
Fig. 3 is a block diagram of the measurement and control device in embodiment 3.
Fig. 4 is a block diagram of the measurement and control device in embodiment 4.
Fig. 5 is a block diagram of the measurement and control device in embodiment 5.
Fig. 6 is a block diagram of the measurement and control device in embodiment 6.
Fig. 7 is a block diagram showing the structure of the measurement and control device in embodiment 7.
Fig. 8 is a block diagram showing the structure of the measurement and control device in embodiment 8.
Fig. 9 is a block diagram showing a structure of a measurement and control device according to embodiment 9.
Fig. 10 is a schematic structural diagram of the online measurement and control device of the drilling rig in embodiment 10.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
the reference numerals and components referred to in the drawings are as follows:
1. Power supply 2. display screen
3. parameter measuring sensor device 31 tilt sensor
32. Azimuth angle sensor 33 roll pitch angle sensor
34. Temperature sensor 35, pressure sensor
37. Speed sensor 38, displacement sensor
4. running gear 41. steel caterpillar
5. Working platform 6. pump station
7. Operation table 71, adjustment control area
72. Drilling control area 8. oil tank
9. base 91 lower gyrator
92. Lift cylinder 93, sliding bearing seat
94. support oil cylinder 10. power head
11. Drill boom
Example 1
Referring to fig. 1, fig. 1 is a block diagram of a measurement and control device in embodiment 1. A drilling machine angle on-line accurate measurement and control device comprises a drilling machine body, a display screen 2 and an inclination angle sensor 31; the display screen 2 is arranged on an operating table 7 of the drilling machine body; the inclination angle sensor 31 is arranged on a drill boom 11 on the drilling machine body; the inclination angle sensor 31 is connected with the display screen 2 through a cable; the tilt sensor 31 is used for measuring the included angle between the drill hole and the horizontal plane.
The embodiment needs to be explained as follows: the inclination angle of the drill hole is measured by designing the inclination angle sensor 31, the measurement is accurate, and the problem that the inclination angle of the drill hole is measured manually in the traditional technology is not accurate is solved.
Example 2
Referring to fig. 2, fig. 2 is a block diagram of a measurement and control device in embodiment 2. A drilling machine angle on-line accurate measurement and control device comprises a drilling machine body, a display screen 2 and an azimuth angle sensor 32; the display screen 2 is arranged on an operation table 7 of the drilling machine body; the azimuth angle sensor 32 is arranged on the drill boom 11 on the drilling machine body, or the azimuth angle sensor is arranged at any position of the rotating part of the lower gyrator of the drilling machine body; the azimuth sensor 32 is used to measure the borehole azimuth. Through azimuth sensor 32 in this embodiment for measure the position more accurate, guarantee that drilling distributes evenly, be difficult for causing the cross hole phenomenon.
The embodiment needs to be explained as follows: by designing the azimuth angle sensor 32 to measure the inclination angle of the drill hole, the measurement is accurate, and the problem that the azimuth angle of the drill hole is measured manually in the traditional technology is not accurate is solved.
example 3
referring to fig. 3, fig. 3 is a block diagram of a measurement and control device in embodiment 3. A drilling machine angle on-line accurate measurement and control device comprises a drilling machine body, a display screen 2, an inclination angle sensor 31 and an azimuth angle sensor 32; the display screen 2 is arranged on an operation table 7 of the drilling machine body; the inclination angle sensor 31 and the azimuth angle sensor 32 are both arranged on the drill boom 11 on the drill body.
This embodiment is to be noted that in this embodiment, the inclination sensor 31 and the azimuth sensor are used together to make the position of the borehole have a positioning function.
Example 4
Referring to fig. 4, fig. 4 is a block diagram of a measurement and control device in embodiment 4. In this embodiment, the measurement and control device includes a roll pitch angle sensor 33, and the roll pitch angle sensor 33 is used for measuring a roll angle and a pitch angle of the drilling machine; meanwhile, the state of the drilling machine is monitored, and an alarm can be given when the roll angle and the pitch angle exceed the design values, so that the drilling machine is prevented from being overturned due to too large angle.
The embodiment needs to be explained as follows: through setting up roll every single move sensor, ensure that the rig can be stable continuous the work of driling, improve drilling efficiency.
Example 5
Referring to fig. 5, fig. 5 is a block diagram of a measurement and control device in embodiment 5. In this embodiment, the measurement and control device includes a temperature sensor 34; the temperature sensor 34 is used for monitoring and measuring the oil temperature of the hydraulic system, and can give an alarm when the oil temperature of the hydraulic system is too high, so that overload operation of equipment is avoided.
The embodiment needs to be explained as follows: through temperature sensor 34, can realize monitoring the temperature for rig long service life.
Example 6
Referring to fig. 6, fig. 6 is a block diagram of a measurement and control device in embodiment 6. In this embodiment, the measurement and control device includes a pressure sensor 35, and the pressure sensor 35 is used for monitoring and measuring the working pressure of the hydraulic system, and provides reference information for the driller.
The embodiment needs to be explained as follows: through pressure sensor 35, can monitor the oil pressure, guarantee each operating device of rig and work steadily.
Example 7
Referring to fig. 7, fig. 7 is a block diagram of a measurement and control device in embodiment 7. In this embodiment, the measurement and control device includes a rotation speed sensor 36, and the rotation speed sensor 36 is used for monitoring and measuring the rotation speed of the power head 10 (main rotation mechanism of the drilling machine).
The embodiment needs to be explained as follows: the rotating speed can be judged by the rotating speed sensor 36, so that the drilling quality is good.
Example 8
Referring to fig. 8, fig. 8 is a block diagram of a measurement and control device in embodiment 8. In this embodiment, the measurement and control device includes a displacement sensor 37, and the displacement sensor 37 monitors the relative displacement between the measurement power head 10 and the drill boom 11.
The embodiment needs to be illustrated as follows: through displacement sensor 37, can the accurate drilling position of judging, the drilling is quick and accurate.
Example 9
Referring to fig. 9, fig. 9 is a block diagram of a measurement and control device in embodiment 9. A drilling machine angle on-line accurate measurement and control device comprises a power supply 1, a display screen 2 and a parameter measurement sensor device 3; the parameter measurement sensor device 3 converts the physical signals into electric signals, the electric signals are transmitted to the display screen 2 through a cable, and the display screen 2 receives the electric signals, processes and calculates the electric signals and displays results; the parameter measuring sensor device 3 comprises an inclination angle sensor 31, an azimuth angle sensor 32, a roll pitch angle sensor 33, a temperature sensor 34, a pressure sensor 35, a rotating speed sensor 36 and a displacement sensor 37; the power supply 1 can be an external input power supply 1, a built-in power battery, a built-in rechargeable storage battery and the like; the built-in may be built in only the display 2 or may be built in both the display 2 and the sensor.
The display screen 2, the inclination angle sensor 31, the azimuth angle sensor 32, the roll pitch angle sensor 33, the temperature sensor 34 and the pressure sensor 35 are all devices protected by an intrinsically safe i-shaped protection device or a flameproof housing d-shaped protection device.
The inclination angle sensor 31 is used for measuring the inclination angle of the drill hole; the azimuth angle sensor 32 is used for measuring the azimuth angle of the drilling hole; the roll pitching sensor is used for measuring a roll angle and a pitching angle of the drilling machine; the temperature sensor 34 is used for measuring the oil temperature of the hydraulic system; the pressure sensor 35 is used for measuring the pressure of the hydraulic system; the rotating speed sensor 36 is used for measuring the output rotating speed of the power head 10; the displacement sensor 37 is used for measuring the displacement of the power head 10.
The embodiment needs to be explained as follows: through parameter measurement sensor device 3, realize quick trompil to can quick accurate measurement and angle regulation, the security is good, and drilling efficiency is high.
Example 10
Referring to fig. 10, fig. 10 is a schematic structural diagram of an on-line measurement and control device of a drilling rig in embodiment 10. A drilling machine on-line measurement and control device comprises a traveling mechanism 4; a working platform 5 is arranged on the travelling mechanism 4; an operating platform 7 is arranged at one end of the working platform 5; the operating platform 7 is provided with a display screen 2; an oil tank 8 is arranged on one side of the operating platform 7; the other end of the working platform 5 is provided with a drill boom 11; the power head 10 is arranged on the drill boom 11.
the traveling mechanism 4 in this embodiment is provided with a steel crawler belt 41 having sufficient supporting force; and two double-speed hydraulic motors are arranged in the travelling mechanism 4, so that variable-speed automatic travelling can be realized, the climbing capacity can be below 30 degrees, and the problem that the traditional drilling machine is difficult to climb over is effectively solved.
The operation platform 7 in the embodiment is a control device of the drilling machine, is composed of a highly integrated multi-way valve, a pressure gauge and the like, integrates a cooling water interface, a high-pressure water interface and a high-pressure gas interface, can be switched at any time, and is simple and convenient to operate. The operation table 7 is also provided with a regulation control area 71, a switching valve and a drilling control area 72, drilling and posture regulation are set to be an interlocking safety mode through the switching valve, and misoperation is effectively avoided.
The measurement and control device in the embodiment is provided with a pump station 6, the pump station 6 adopts an explosion-proof motor to provide power, and the pump station is directly connected with a transmission duplex plunger pump to provide power for a drilling machine hydraulic mechanism. The direct connection transmission efficiency is higher, and the safety and the reliability are realized. The traditional drilling machine adopts a belt form to provide power, so that potential safety hazards exist.
The measurement and control device in the embodiment is provided with a base 9, wherein the base 9 comprises a lower gyrator 91, a lifting oil cylinder 92, a sliding bearing seat 93, an upper gyrator and a supporting oil cylinder 94; the sliding bearing block 93 is arranged on the lower gyrator 91; a lifting oil cylinder 92 and a supporting oil cylinder 94 are arranged in the sliding bearing seat 93; the number of the supporting oil cylinders 94 is two, and the lifting oil cylinder 92 is arranged between the two supporting oil cylinders 94; and a rotator is arranged on one side surface of the sliding bearing seat 93. The lifting oil cylinder 92 drives the sliding bearing seat 93 and the drilling machine host machine to perform lifting motion, and automatic adjustment of the drilling height is achieved. The requirements of drilling holes with different heights are met. The lower gyrator 91 realizes the function of automatic rotation of the drilling machine in 360 degrees in the plane; the upper gyrator realizes the function of 360-degree automatic rotation of the vertical surface of the drilling machine. The upper gyrator is matched with the lower gyrator 91, so that the rotation in any direction in a space range can be realized, and the requirements of any included angle, any inclination angle and any drilling hole are met; the supporting oil cylinder 94 can be supported upwards, and when the upper part of the supporting oil cylinder 94 is abutted to the top plate of the roadway, a powerful support can be provided for the drilling machine. The lifting oil cylinder 92 and the supporting oil cylinder 94 provide hydraulic locks, and when the system loses power, the original state can be kept, so that safety accidents are avoided.
In the embodiment, the power head 10 is provided with a stepless speed regulation variable motor to realize the stepless speed regulation function, so that the drilling machine can drill holes forcefully and powerfully, and can be suitable for drilling operation of various geological structures. The power head 10 is provided with the chuck which adopts a hydraulic mechanical structure, so that the service life is long, the use cost is low, and the safety risk is reduced. One end of the power head 10 is provided with a long-arm hydraulic clamp holder, and in the operation process of the drilling machine, if sudden abnormal conditions such as power failure, pressure loss and the like occur, the torque can be automatically braked, so that the safety accident that the power head 10 falls down after pressure loss is prevented.
The utility model discloses a measuring method of online accurate measurement and control device of rig angle, measuring method include following step:
Step S1, operating the drilling machine to adjust to a target hole position;
Step S2, firstly, the rear end of the drilling machine is supported and posture-adjusted, and then the front end of the drilling machine is supported and posture-adjusted to adjust the position of the power head 10;
Step S3, observing each parameter of the parameter measurement sensor device 3 through the display screen 2 to perform an auxiliary operation;
And step S4, adjusting the power head 10 to the posture of the target parameter position, and then performing drilling and pulling operations until drilling is completed.
The utility model discloses a device and a method for online accurate measurement and control of drilling machine angle, which can realize rapid hole opening, can rapidly and accurately measure and adjust the angle, has good safety, high drilling efficiency and labor saving; the inclination angle of the drill hole is measured by designing the inclination angle sensor 31, so that the measurement is accurate, and the problem that the inclination angle of the drill hole is measured by manpower in the traditional technology is solved; the inclination angle sensor 31 and the azimuth angle sensor are used together, so that the position of the drilling hole has a positioning effect; through parameter measurement sensor device 3, can monitor each item parameter of drilling comprehensively, drilling is of high quality, and the security is high, and has improved drilling efficiency.
the above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and additions can be made without departing from the method of the present invention, and these improvements and additions should also be regarded as the protection scope of the present invention.
Claims (6)
1. The online accurate measurement and control device of the rig angle is characterized in that the measurement and control device comprises a display screen, a rig body and a parameter measuring sensor device; the parameter measuring sensor device is arranged on each working mechanism of the drilling machine body; the parameter measuring sensor device is connected with the display screen through a cable; the parameter measurement sensor device comprises any one or combination of the following components: the device comprises an inclination angle sensor, an azimuth angle sensor, a roll pitch angle sensor, a temperature sensor, a pressure sensor, a rotating speed sensor and a displacement sensor;
The inclination angle sensor is used for measuring the inclination angle of the drill hole; the azimuth angle sensor is used for measuring the azimuth angle of the drilling hole; the roll pitching sensor is used for measuring a roll angle and a pitching angle of the drilling machine; the temperature sensor is used for measuring the oil temperature of the hydraulic system; the pressure sensor is used for measuring the pressure of the hydraulic system; the rotating speed sensor is used for measuring the output rotating speed of the power head; and the displacement sensor is used for measuring the displacement of the power head.
2. the online accurate measurement and control device of drilling machine angle according to claim 1, characterized in that the display screen, the tilt sensor, the azimuth sensor, the roll pitch sensor, the temperature sensor and the pressure sensor are all devices protected by an intrinsically safe "i" or a flameproof housing "d".
3. The online accurate measurement and control device for the angle of the drilling machine as claimed in claim 1, wherein the inclination angle sensor is mounted on a drill boom of the drilling machine body and converts inclination angle signals of the drill boom into electric signals.
4. The device for on-line accurate measurement and control of the angle of the drilling machine according to claim 1, characterized in that the measurement and control device further comprises a power supply, wherein the power supply can be an external input power supply, a built-in power battery or a built-in rechargeable storage battery.
5. The online accurate measurement and control device for the angle of the drilling machine as claimed in claim 1, wherein the azimuth angle sensor is arranged on a drill boom on the drilling machine body, or the azimuth angle sensor is arranged at any position of a rotating part of a lower gyrator of the drilling machine body; the azimuth angle signal of the drill boom is converted into an electrical signal.
6. The device for on-line accurate measurement and control of the angle of the drilling machine according to claim 1, wherein the cable is a mining cable.
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| CN201920208654.1U CN209780862U (en) | 2019-02-19 | 2019-02-19 | Online accurate measurement and control device for angle of drilling machine |
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| CN201920208654.1U CN209780862U (en) | 2019-02-19 | 2019-02-19 | Online accurate measurement and control device for angle of drilling machine |
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| CN209780862U true CN209780862U (en) | 2019-12-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707366A (en) * | 2019-02-19 | 2019-05-03 | 重庆平山矿山机电设备有限公司 | A kind of drilling machine angle accurate measure and control device and method online |
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2019
- 2019-02-19 CN CN201920208654.1U patent/CN209780862U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707366A (en) * | 2019-02-19 | 2019-05-03 | 重庆平山矿山机电设备有限公司 | A kind of drilling machine angle accurate measure and control device and method online |
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Address after: 401320 600 nanhu road, NANPENG street, Banan District, Chongqing Patentee after: Chongqing Pingshan Electromechanical Equipment Co.,Ltd. Address before: 401320 600 nanhu road, NANPENG street, Banan District, Chongqing Patentee before: CHONGQING PINGSHAN MINING ELECTROMECHANICAL EQUIPMENT Co.,Ltd. |
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