CN117656794A - Whole vehicle system and electric mine card - Google Patents
Whole vehicle system and electric mine card Download PDFInfo
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- CN117656794A CN117656794A CN202311825717.5A CN202311825717A CN117656794A CN 117656794 A CN117656794 A CN 117656794A CN 202311825717 A CN202311825717 A CN 202311825717A CN 117656794 A CN117656794 A CN 117656794A
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- 238000001816 cooling Methods 0.000 claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 230000009471 action Effects 0.000 claims abstract description 13
- 238000005065 mining Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 239000000295 fuel oil Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The application provides a whole vehicle system. The whole vehicle system comprises: the system comprises a complete machine controller, a battery control module, a battery box, a DC/DC module, a hydraulic module, a water cooling module, an electric wheel module and a control power supply; the whole machine controller is respectively connected with the battery control module, the hydraulic module, the water cooling module and the control power supply; the battery control module is respectively connected with the battery box and the control power supply; the DC/DC module is respectively connected with the battery box, the hydraulic module, the water cooling module, the electric wheel module and the control power supply; the whole machine controller is used for respectively controlling the battery control module to work, controlling the hydraulic module to execute hydraulic action and controlling the water cooling module to execute cooling action; the DC/DC module is used for converting the voltage output by the battery box and supplying power to the hydraulic module, the water cooling module, the electric wheel module and the control power supply respectively; the control power supply is used for supplying power to the whole machine controller and the battery control module respectively. The method and the device can reduce the pollution to the environment during the operation of the mine card.
Description
Technical Field
The application relates to the technical field of mine cards, in particular to a whole car system and an electric mine card.
Background
The mining truck (abbreviated as mine truck) is a heavy dump truck for finishing the tasks of rock earthwork stripping and ore transportation in the surface mine. Along with the continuous development of economy, the demand of the ore cards is continuously increased, and the ore cards are continuously updated due to the requirements of economy and environmental protection.
At present, the core of the mine truck is a hydraulic system, most of the mine truck is driven by fuel oil, and the hydraulic system is also powered by fuel oil combustion. However, fuel combustion may result in increased environmental pollution. In addition, the existing electric automobile does not comprise a high-power hydraulic system, and the whole automobile system of the electric automobile is difficult to directly cover on the mine card.
In view of this, the present application provides a whole vehicle system and an electric mining card to drive a hydraulic system of the mining card, and simultaneously reduce environmental pollution.
Disclosure of Invention
The embodiment of the application provides a whole car system and an electric mine card to drive a hydraulic system of the mine card, and simultaneously reduce environmental pollution.
In a first aspect, an embodiment of the present application provides a whole vehicle system, including: the system comprises a complete machine controller, a battery control module, a battery box, a DC/DC module, a hydraulic module, a water cooling module, an electric wheel module and a control power supply;
the whole machine controller is respectively connected with the battery control module, the hydraulic module, the water cooling module and the control power supply; the battery control module is respectively connected with the battery box and the control power supply; the DC/DC module is respectively connected with the battery box, the hydraulic module, the water cooling module, the electric wheel module and the control power supply;
the whole machine controller is used for respectively controlling the battery control module to work, controlling the hydraulic module to execute hydraulic action and controlling the water cooling module to execute cooling action;
the DC/DC module is used for converting the voltage output by the battery box and supplying power to the hydraulic module, the water cooling module, the electric wheel module and the control power supply respectively;
and the control power supply is used for respectively supplying power to the whole machine controller and the battery control module.
In one possible implementation, the entire vehicle system further includes a first battery and a second battery connected to the control power source.
In one possible implementation, the motorized wheel module includes a motorized wheel and a braking resistor that are each connected to the DC/DC module.
In one possible implementation, the battery box includes a predetermined number of battery clusters connected in parallel, each of the battery clusters being controlled by the battery control module.
In one possible implementation, the whole vehicle system further comprises a preset number of circuit breakers connected between the battery box and the DC/DC module; a circuit breaker is connected between each battery cluster and the DC/DC module.
In one possible implementation, the water cooling module includes a drive cabinet water cooling unit and a battery water cooling unit, both connected to the DC/DC module.
In one possible implementation, the entire vehicle system further includes a resistor box heat dissipating fan and an electric wheel heat dissipating fan, both connected to the DC/DC module.
In one possible implementation manner, the whole vehicle system further comprises a wire changing box connected with the whole vehicle controller, the battery control module and the water cooling module respectively, and the wire changing box is also used for being connected with peripheral equipment.
In one possible implementation, the whole vehicle system further comprises a display module connected with the whole vehicle controller.
In a second aspect, an embodiment of the present application provides an electric mining card, including the entire vehicle system according to any one of the first aspect above.
The embodiment of the application provides a whole vehicle system and electric mine card, and the whole vehicle system comprises a whole vehicle controller, a battery control module, a battery box, a DC/DC module, a hydraulic module, a water cooling module, an electric wheel module and a control power supply. The whole machine controller is used for controlling the battery module to work, controlling the hydraulic module to execute hydraulic action and controlling the water cooling module to execute cooling action. The DC/DC module is used for converting the voltage output by the battery box and supplying power to the hydraulic module, the water cooling module, the electric wheel module and the control power supply respectively, so that each execution module can work normally. According to the whole vehicle system of the pure electric driving hydraulic module, the whole vehicle system can be applied to an electric mine card, and pollution of the mine card to the environment in the operation process is reduced when the mine card is driven to execute hydraulic action.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a whole vehicle system provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of another vehicle system according to an embodiment of the present application.
Detailed Description
In order to make the present solution better understood by those skilled in the art, the technical solution in the present solution embodiment will be clearly described below with reference to the accompanying drawings in the present solution embodiment, and it is obvious that the described embodiment is an embodiment of a part of the present solution, but not all embodiments. All other embodiments, based on the embodiments in this solution, which a person of ordinary skill in the art would obtain without inventive faculty, shall fall within the scope of protection of this solution.
The term "comprising" in the description of the present solution and the claims and in the above-mentioned figures, as well as any other variants, means "including but not limited to", intended to cover a non-exclusive inclusion, and not limited to only the examples listed herein. Furthermore, the terms "first" and "second," etc. are used for distinguishing between different objects and not for describing a particular sequential order.
The pollution generated by the fuel oil mine card during operation can cause the aggravation of environmental pollution, and in order to reduce the environmental pollution, the pure electric drive can be used as a development direction of the mine card. The development of the existing electric automobile is mature, however, the core drive of the mine truck is a hydraulic system, and the electric automobile generally does not comprise a high-power hydraulic system. Therefore, it is difficult to directly sleeve the whole vehicle system of the electric vehicle on the mine card.
In order to solve the problems, the embodiment of the application provides a whole vehicle system which can be applied to a mine truck, and can effectively reduce environmental pollution while driving a hydraulic system.
Embodiments of the present application will be specifically described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a whole vehicle system provided in an embodiment of the present application. As shown in fig. 1, the whole vehicle system may include: the electric vehicle comprises a complete machine controller 11, a battery control module 12, a battery box 13, a DC/DC module 14, a hydraulic module 15, a water cooling module 16, an electric wheel module 17 and a control power supply 18.
The whole machine controller 11 is respectively connected with a battery control module 12, a hydraulic module 15, a water cooling module 16 and a control power supply 18.
The battery control module 12 is connected to the battery box 13 and the control power supply 18, respectively.
The DC/DC module 14 is connected with the battery box 13, the hydraulic module 15, the water cooling module 16, the electric wheel module 17 and the control power supply 18 respectively.
The complete machine controller 11 is used for respectively controlling the battery control module 12 to work, controlling the hydraulic module 15 to execute hydraulic action and controlling the water cooling module 16 to execute cooling action.
The DC/DC module 14 is configured to convert the voltage output from the battery box and supply power to the hydraulic module 15, the water cooling module 16, the electric wheel module 17, and the control power source 18, respectively.
And a control power supply 18 for supplying power to the complete machine controller 11 and the battery control module 12, respectively.
Specifically, the overall machine controller 11 has a first control end connected to the control end of the battery control module 12, a second control end connected to the control end of the hydraulic module 15, a third control end connected to the control end of the water cooling module 16, and a power supply end connected to the first power supply end of the control power supply 18.
The input end of the DC/DC module 14 is connected with the output end of the battery box 13, the first power supply output end is connected with the driving end of the hydraulic module 15, the second output end is connected with the driving end of the water cooling module 16, the third output end is connected with the driving end of the electric wheel module 17, and the fourth output end is connected with the input end of the control power supply 18.
And a control power supply 18, wherein a first power supply end is connected with the power supply end of the whole machine controller 11, and a second power supply end is connected with the power supply end of the battery control module 12.
In the embodiment of the present application, the complete machine controller 11 serves as a central controller of the complete machine system, and may communicate with the battery control module 12. The complete machine controller 11 may issue a charge instruction, a discharge instruction, a sleep instruction, etc. to the battery control module 12.
Specifically, the battery control module 12 may control the battery in the battery box 13 to be charged when receiving a charging instruction. Upon receiving the discharge instruction, the battery in the battery box 13 may be controlled to be discharged. Upon receiving the sleep instruction, the battery in the battery box 13 may be controlled to sleep.
In addition, the battery control module 12 can feed back the relevant information such as the working state and the working parameter of each battery in the battery box 13 to the whole machine controller 11, so that the whole machine controller 11 can conveniently control the relevant information of each battery in time.
In the embodiment of the application, the hydraulic module 15 can comprise a hydraulic pump motor, and the hydraulic pump motor can be controlled by using a 200kW frequency converter, so that the output power is automatically adjusted according to father and son, and unnecessary energy consumption is reduced.
In the embodiment of the present application, the complete machine controller 11 may send a control instruction to the hydraulic module 15 to control the hydraulic module 15 to perform a corresponding hydraulic action. The hydraulic module 15 can control the motion of the executing element to complete various process operations, realize the power control of the controlled object, realize the control of the medium such as liquid, gas and the like.
In the embodiment of the application, the complete machine controller 11 can control the water cooling module 16 to execute cooling action, and the water cooling module 16 can perform water cooling on a high-power module in the complete vehicle system to ensure the operation reliability of the complete vehicle system. The water cooling module 16 may be a hydraulic module 15, a battery control module 12, a battery box 13, an electric wheel module 17, etc. for cooling, so as to ensure that each module works in a proper temperature range.
In the embodiment of the present application, the electric wheel module 17 is used as a driving wheel of the whole vehicle system, so that the whole vehicle can be operated.
In the embodiment of the present application, the battery box 13 includes a plurality of batteries therein, and the output terminals of the plurality of batteries are connected to the DC/DC module 14.
The DC/DC module 14 is connected with the hydraulic module 15, and is used for providing working voltage for the hydraulic module 15, the second output end is connected with the water cooling module 16, and is used for providing working voltage for the water cooling module 16, the third output end is connected with the electric wheel module, and is used for providing working voltage for the electric wheel module 17, and the fourth output end is connected with the control power supply 18, and is used for providing working voltage for the control power supply 18.
The DC/DC module 14 may include a plurality of voltage conversion units, and each voltage conversion unit may convert the voltage output from the battery box 13 into an operating voltage suitable for each module.
In the embodiment of the present application, the control power supply 18 may convert the output voltage of the DC/DC module 14 to obtain a power supply voltage for working for each controller device, so as to ensure that the core chips of the overall controller 11 and the battery control module 12 may work normally.
For example, the battery box 13 may have an output voltage of 300VDC, and the DC/DC module 14 may convert 300VDC into 1500VDC to drive the hydraulic module 15, the water cooling module 16, and the electric wheel module 17 to operate normally. The DC/DC module 14 may also convert 300VDC to 12VDC, 5VDC, 3.3VDC, etc. to ensure that the overall controller 11 and the battery control module 12 may function properly.
According to the full-electric-drive whole vehicle system, the battery-driven hydraulic module can be utilized, fuel oil driving is not needed, the core of the whole vehicle system can be guaranteed to normally operate, meanwhile, the pollution to the environment during whole vehicle operation is reduced, and the purpose of protecting the environment is achieved.
Fig. 2 is a schematic structural diagram of another vehicle system provided in an embodiment of the present application, as shown in fig. 2, and in some embodiments of the present application, the vehicle system may further include a first battery 19 and a second battery 20 connected to the control power source 18.
The first storage battery 19 and the second storage battery 20 can both supply power to the outside, and meanwhile, the first storage battery 19 and the second storage battery 20 can both be charged, and serve as emergency power sources for emergency power supply of the whole vehicle system when the battery box 13 is powered off.
The first storage battery 19 and the second storage battery 20 can supply power for emergency to the whole machine controller 11 and the battery control module 12 through the control band energy source 18.
In some embodiments of the present application, the electric wheel module may include an electric wheel and a brake resistor, each connected to the DC/DC module.
Specifically, the electric wheel module may include a first electric wheel, a second electric wheel, a first brake resistor, and a second brake resistor. The first electric wheel and the first braking resistor are in a group, and the second electric wheel and the second braking resistor are in a group.
In an embodiment of the present application, both the first braking resistor and the second braking resistor may be braking resistor grids. When the first electric wheel or the second electric wheel feeds back energy to the battery box, if the battery in the battery box is full, the braking resistor grid can be utilized to consume energy, the using frequency of the braking resistor grid is reduced, and the energy utilization rate is improved.
In the embodiment of the application, the first electric wheel and the second electric wheel can be controlled in a torque balance control mode, so that energy consumption can be effectively reduced. When braking or descending, the energy can be recovered and is charged into the battery in the battery box, so that the energy utilization rate can be effectively improved, and the energy conservation and emission reduction can be realized. Wherein, can adopt two 800 kW's converters to control two electric wheels respectively.
In some embodiments of the present application, the battery box includes a preset number of battery clusters connected in parallel, all of which are controlled by the battery control module. For example, the battery box can comprise thirteen battery clusters connected in parallel to jointly provide power for the whole vehicle system.
The battery control module can respectively control each battery cluster to charge, discharge or sleep, and can also adjust parameters such as output voltage, current and the like of each battery cluster.
In the embodiment of the application, 13 battery clusters are connected into the whole vehicle system, and the voltage is respectively converted through the DC/DC module and then converged. The voltage range of the access battery is wide, and the voltage range of 700-1000V is applicable. The voltage balance of each battery cluster is not required, and the battery circulation can be effectively avoided by independently controlling each battery cluster.
Meanwhile, shutdown faults occur in 1-4 clusters of batteries, and the whole vehicle function is not affected as long as the electric quantity of other batteries does not reach the low limit. The energy feedback is also 13 paths of independent control, so that the balance of the battery can be effectively improved, and the energy feedback is effectively utilized.
In some embodiments of the present application, the entire vehicle system may further include a preset number of circuit breakers connected between the battery box and the DC/DC module; a circuit breaker is connected between each battery cluster and the DC/DC module.
For each battery cluster, when the battery cluster outputs faults, a breaker between the battery cluster and the DC/DC module can be controlled to be disconnected, the fault battery cluster is prevented from being connected to work, and further the working reliability of the whole vehicle system is improved.
As shown in fig. 2, in some embodiments of the present application, the water cooling module 16 includes a drive cabinet water cooling unit and a battery water cooling unit, both connected to the DC/DC module. Wherein, the driving cabinet water cooling unit and the battery water cooling unit are controlled by the whole machine controller 11.
In the embodiment of the application, the driving cabinet water cooling unit consists of a water cooling unit, a water cooling controller, a radiator and the like. The cooling device mainly provides the functions of cooling a driving cabinet, cooling a hydraulic pump motor, cooling hydraulic oil and the like, adopts independent split type design, and is convenient for on-site arrangement.
In the embodiment of the application, the battery water cooling unit can cool the battery control module, so that the battery control module is ensured to work in a normal temperature range.
As shown in fig. 2, in some embodiments of the present application, the entire vehicle system may further include a resistor box heat dissipation fan 21 and an electric wheel heat dissipation fan 22, both connected to the DC/DC module.
In the embodiment of the present application, the resistor box heat dissipation fan 21 and the electric wheel heat dissipation fan 22 may both be controlled by the complete machine controller 11.
In the embodiment of the application, the electric wheel heat dissipation fan 22 can be controlled by utilizing the frequency converter, and the output power is controlled according to the temperature and the working state of the motor, so that the energy consumption is effectively reduced, and the dust accumulation is reduced. Similarly, the frequency converter can be used for controlling the resistor box cooling fan 21, and the energy consumption is effectively reduced, the dust accumulation of the resistor box is reduced, and the working reliability of the whole vehicle system is improved by controlling the output power.
In some embodiments of the present application, the whole vehicle system may further include a line changing box connected to the whole vehicle controller, the battery control module and the water cooling module, respectively, where the line changing box is further used for being connected to a peripheral device.
In some embodiments of the present application, the whole vehicle system may further include a display module connected to the whole vehicle controller.
The display module can carry out information interaction with the whole vehicle controller, and displays the working state of each battery in the battery box, the working state of the water cooling module, the working state of the hydraulic module, the working state of the cooling fan and the like, so that a driver can conveniently control the running state of the whole vehicle in real time, and the running reliability of the whole vehicle system is ensured.
In some embodiments of the present application, the whole vehicle system may further include a cab connected to the line changing box and the whole vehicle controller in decibels, and the display module is disposed in the cab.
In some embodiments of the present application, the whole vehicle system may further include an illumination indication module connected to the whole vehicle controller and the DC/DC module, where the illumination indication module is controlled by the whole vehicle controller and may perform operation illumination.
In some embodiments of the present application, the whole vehicle system may further include a cloud platform, where the cloud platform may be connected to the whole vehicle controller in a wireless communication manner. The cloud platform can receive important operation information and data collected by the whole vehicle controller, can remotely monitor the operation state of the whole vehicle system, analyze the operation data, and perform relevant maintenance and optimization work in advance according to analysis results.
The embodiment of the application also provides an electric mine card, which comprises the whole car system of any embodiment.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. The whole vehicle system is characterized by comprising: the system comprises a complete machine controller, a battery control module, a battery box, a DC/DC module, a hydraulic module, a water cooling module, an electric wheel module and a control power supply;
the whole machine controller is respectively connected with the battery control module, the hydraulic module, the water cooling module and the control power supply; the battery control module is respectively connected with the battery box and the control power supply; the DC/DC module is respectively connected with the battery box, the hydraulic module, the water cooling module, the electric wheel module and the control power supply;
the whole machine controller is used for respectively controlling the battery control module to work, controlling the hydraulic module to execute hydraulic action and controlling the water cooling module to execute cooling action;
the DC/DC module is used for converting the voltage output by the battery box and supplying power to the hydraulic module, the water cooling module, the electric wheel module and the control power supply respectively;
and the control power supply is used for respectively supplying power to the whole machine controller and the battery control module.
2. The vehicle system of claim 1, further comprising a first battery and a second battery connected to the control power source.
3. The vehicle system of claim 1, wherein the electric wheel module includes an electric wheel and a brake resistor each connected to the DC/DC module.
4. The vehicle system of claim 1, wherein the battery compartment includes a predetermined number of battery clusters connected in parallel, each of the battery clusters being controlled by the battery control module.
5. The vehicle system of claim 4, further comprising a predetermined number of circuit breakers connected between the battery box and the DC/DC module; a circuit breaker is connected between each battery cluster and the DC/DC module.
6. The vehicle system of claim 1, wherein the water cooling module includes a drive cabinet water cooling unit and a battery water cooling unit, both connected to the DC/DC module.
7. The vehicle system of claim 1, further comprising a resistor box heat dissipating fan and an electric wheel heat dissipating fan each connected to the DC/DC module.
8. The complete vehicle system of claim 1, further comprising a line changing box connected to the complete vehicle controller, the battery control module, and the water cooling module, respectively, the line changing box further configured to be connected to a peripheral device.
9. The complete vehicle system of claim 1, further comprising a display module coupled to the complete vehicle controller.
10. An electric mining card comprising a complete vehicle system as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311825717.5A CN117656794A (en) | 2023-12-27 | 2023-12-27 | Whole vehicle system and electric mine card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311825717.5A CN117656794A (en) | 2023-12-27 | 2023-12-27 | Whole vehicle system and electric mine card |
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| Publication Number | Publication Date |
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| CN117656794A true CN117656794A (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311825717.5A Pending CN117656794A (en) | 2023-12-27 | 2023-12-27 | Whole vehicle system and electric mine card |
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|---|---|---|---|---|
| CN107539192A (en) * | 2016-06-29 | 2018-01-05 | 比亚迪股份有限公司 | A kind of electronic mine dumper |
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| CN109532444A (en) * | 2019-01-09 | 2019-03-29 | 湖北金诚信矿业服务有限公司 | A kind of electric LHD |
| CN109624680A (en) * | 2018-12-07 | 2019-04-16 | 湖北金诚信矿业服务有限公司 | A kind of electric LHD |
| CN214295846U (en) * | 2020-12-30 | 2021-09-28 | 安百拓（南京）建筑矿山设备有限公司 | Battery scraper electric control system and battery scraper |
| CN115946547A (en) * | 2022-12-06 | 2023-04-11 | 太原重工股份有限公司 | Hybrid power system based on carbon-based capacitor battery and control method |
-
2023
- 2023-12-27 CN CN202311825717.5A patent/CN117656794A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107539192A (en) * | 2016-06-29 | 2018-01-05 | 比亚迪股份有限公司 | A kind of electronic mine dumper |
| CN109624680A (en) * | 2018-12-07 | 2019-04-16 | 湖北金诚信矿业服务有限公司 | A kind of electric LHD |
| CN109532443A (en) * | 2019-01-09 | 2019-03-29 | 湖北金诚信矿业服务有限公司 | A kind of electric LHD |
| CN109532444A (en) * | 2019-01-09 | 2019-03-29 | 湖北金诚信矿业服务有限公司 | A kind of electric LHD |
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