A micro hydraulic mining drill rig and an energy-saving control device thereof

Abstract

The utility model relates to mining equipment control technical field discloses a kind of miniature hydraulic mining drill rig and its energy-saving control device, device includes: frequency converter, mining explosion-proof lithium ion battery, vehicle-mounted controller, distributed control system and main motor, wherein, external AC380V power supply is connected with the first power supply end of frequency converter, mining explosion-proof lithium ion battery is connected with the second power supply end of frequency converter;Frequency converter and distributed control system establish communication connection, vehicle-mounted controller passes through the two-way communication of distributed control system;The output end of frequency converter is connected with the main motor of drill rig.This application adopts the mode of frequency drive and lithium battery, improves energy efficiency, without waste gas pollution;Adopt frequency drive to reduce space and weight;Vehicle-mounted controller is used to realize intelligent control with distributed module.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment control technology, specifically to a miniature hydraulic mining drilling rig and its energy-saving control device. Background Technology

[0002] In the mining industry, small shallow-hole drilling rigs are commonly used equipment for mining narrow tunnels and thin veins. Currently, small shallow-hole drilling rigs are generally driven and powered by a diesel engine and battery. However, this method has significant drawbacks, as follows: Energy consumption and environmental issues: Diesel engines consume a lot of energy and produce a large amount of exhaust gas when running in enclosed mine tunnels. When ventilation is poor, this can easily cause air pollution and harm the health of operators. At the same time, diesel engines are noisy and damage the working environment.

[0003] Poor spatial adaptability: The large size and weight of the diesel engine result in an overall large size of the drilling rig, which makes it difficult to operate flexibly in narrow tunnels and limits the mining range of thin ore veins.

[0004] Low power supply reliability: The supporting batteries are mostly ordinary lead-acid batteries with low capacity and poor explosion-proof performance. They have a short usable time after a single charge and require frequent shutdowns for charging, which affects mining efficiency. In addition, ordinary batteries do not have a complete status monitoring and protection mechanism, and are prone to overcharging and over-discharging, which can lead to shortened lifespan or safety hazards.

[0005] Low control stability and automation: Existing drilling rigs mostly use PLC single-point control, which has not formed a systematic control architecture. They have poor protection performance and are prone to failure in the harsh environment of mines with humidity and dust. In addition, they lack intelligent control design and rely on manual operation, resulting in low operation efficiency and high operation difficulty.

[0006] In view of the shortcomings of the existing technologies, there is an urgent need for a control scheme for a micro hydraulic mining drill rig that is adaptable to narrow tunnel operations, has low energy consumption, is environmentally friendly, and has a high degree of automation. Utility Model Content

[0007] This utility model provides a miniature hydraulic mining drill rig and its energy-saving control device to solve the problems of high energy consumption, high pollution, poor space adaptability, low power supply reliability and low degree of automation caused by the use of diesel engine and ordinary battery for power supply in existing miniature hydraulic mining drill rigs.

[0008] In a first aspect, this utility model provides an energy-saving control device for a miniature hydraulic mining drilling rig. The device includes: a frequency converter, a mining explosion-proof lithium-ion battery, an on-board controller, a distributed control system, and a main motor. An external AC380V power supply is connected to the first power supply terminal of the frequency converter to provide power for the drilling rig's operation. The mining explosion-proof lithium-ion battery is connected to the second power supply terminal of the frequency converter to provide power for the drilling rig's movement. The inverter establishes a communication connection with the distributed control system. The vehicle controller remotely controls the inverter's operating parameters and collects the inverter's operating status in real time through bidirectional communication with the distributed control system. The output of the frequency converter is connected to the main motor of the drilling rig, and drives the motor to operate by outputting adjustable frequency electrical energy to match the power requirements of the drilling rig under different working conditions.

[0009] This utility model provides an energy-saving control device for a miniature hydraulic mining drilling rig. It eliminates the diesel engine, employing a frequency converter and lithium-ion battery drive. The frequency converter matches load requirements through speed adjustment, reducing energy consumption compared to a diesel engine. Furthermore, this drive method produces no exhaust emissions throughout the entire process, significantly reducing operating noise and effectively improving the working environment in the confined and narrow spaces of underground mines. The mining-grade explosion-proof lithium-ion battery possesses explosion-proof characteristics that meet mining safety standards, stably adapting to the harsh working environment of flammable, explosive, and high-dust conditions underground, completely avoiding the safety hazards caused by the poor explosion-proof performance of traditional ordinary batteries. The use of frequency converter drive reduces space and weight. The energy-saving control device constructs an intelligent control system through a two-way communication link between the on-board controller, distributed control system, and frequency converter, overcoming the shortcomings of unstable PLC control and low automation in existing technologies.

[0010] In one optional embodiment, the device further includes a 24V control system, which is connected to an external AC380V power supply and the mining explosion-proof lithium-ion battery, respectively, for supplying power to the electrical components inside the control cabinet.

[0011] In one optional implementation, an external AC380V power supply is connected to the frequency converter in sequence through a first circuit breaker and a first contactor, and the external AC380V power supply is connected to the 24V control system through the first circuit breaker and a first power module.

[0012] In one optional embodiment, the mining explosion-proof lithium-ion battery is connected to the DC bus of the frequency converter in sequence through a second circuit breaker, a fuse, and a second contactor, and the mining explosion-proof lithium-ion battery is connected to the 24V control system through the second circuit breaker and the second power module.

[0013] In one optional embodiment, the battery box of the mining explosion-proof lithium-ion battery is divided into three parts: a battery compartment, a power distribution compartment, and a wiring compartment; the battery compartment houses the battery module, the power distribution compartment houses the battery management system, and the wiring compartment is equipped with explosion-proof terminals for external output.

[0014] In one optional embodiment, the device further includes a charging pile or a portable charger, wherein the charging pile or the portable charger is connected to the mining explosion-proof lithium-ion battery for charging the mining explosion-proof lithium-ion battery.

[0015] In one alternative embodiment, the device further includes a display screen connected to the distributed control system for displaying the working status of the miniature hydraulic mining rig.

[0016] In one alternative implementation, the distributed control system adopts a master-slave control mode.

[0017] Secondly, this utility model provides a miniature hydraulic mining rig, including the energy-saving control device for the miniature hydraulic mining rig according to the first aspect or any corresponding embodiment.

[0018] In one alternative implementation, the system further includes a remote controller wirelessly connected to the vehicle controller for sending routine operation commands to the vehicle controller.

[0019] The miniature hydraulic mining rig provided by this utility model features a modular design for the rig body, coupled with a miniaturized frequency converter and lithium-ion battery. Its overall size is compact, allowing it to operate in narrow tunnels with a width of less than 1 meter, thus breaking through the spatial limitations of thin ore vein mining. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the first principle of the energy-saving control device for a miniature hydraulic mining drilling rig according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of an external AC380V power supply according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the power supply of a mine explosion-proof lithium-ion battery according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the battery box for a mining explosion-proof lithium-ion battery according to an embodiment of the present utility model. Figure 5 This is a schematic diagram of the first principle of the energy-saving control device for a miniature hydraulic mining drilling rig according to an embodiment of the present utility model; Figure 6 This is a structural schematic diagram of a miniature hydraulic mining drill rig according to an embodiment of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] It is understood that before using the technical solutions disclosed in the various embodiments of this utility model, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in this utility model in an appropriate manner in accordance with relevant laws and regulations, and user authorization should be obtained.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] This utility model provides an energy-saving control device for a miniature hydraulic mining drilling rig, such as... Figure 1 As shown, the system includes: a frequency converter, a mining explosion-proof lithium-ion battery, an on-board controller, a distributed control system, and a main motor. An external AC 380V power supply is connected to the first power supply terminal of the frequency converter to power the drilling rig during operation. The mining explosion-proof lithium-ion battery is connected to the second power supply terminal of the frequency converter to power the drilling rig during movement. The frequency converter establishes a communication connection with the distributed control system. Through bidirectional communication with the distributed control system, the on-board controller remotely controls the frequency converter's operating parameters and collects the frequency converter's operating status in real time. The output terminal of the frequency converter is connected to the main motor of the drilling rig, driving the motor by outputting adjustable frequency electrical energy to match the power requirements of the drilling rig under different operating conditions.

[0026] Specifically, the energy-saving control device addresses the dual needs of flexible movement and stable operation of the miniature drilling rig by designing two independent power supply terminals for the frequency converter. During operation (drilling phase), an external AC380V power supply is connected to the first power supply terminal of the frequency converter. Drilling operations require continuous and stable high-power output, and the AC380V industrial power supply provides continuous power, avoiding the range limitations of battery power and ensuring operational efficiency. During movement (transfer phase), a mining explosion-proof lithium-ion battery is connected to the second power supply terminal of the frequency converter. When the drilling rig is transferred, continuous high-power output is not required, but flexible movement is still necessary. The battery's portability reduces the overall size of the drilling rig, making it suitable for narrow spaces in tunnels; simultaneously, its explosion-proof characteristics meet the safety requirements of flammable, explosive, and high-dust environments in underground mines, solving the problem of poor explosion-proof performance of existing ordinary batteries.

[0027] The energy-saving control device constructs an intelligent control system through a two-way communication link between the vehicle controller, the distributed control system, and the frequency converter, overcoming the shortcomings of existing PLC control technologies, such as instability and low automation. The frequency converter first establishes communication with the distributed control system, transmitting its own operating parameters and motor status. Then, the distributed control system interacts bidirectionally with the vehicle controller. The distributed control system can integrate signals from multiple components (such as battery status data from the battery management system, which can be expanded to include the battery status data), avoiding the complex link of the vehicle controller directly connecting to multiple devices and improving control stability.

[0028] The frequency converter drives the main motor by outputting adjustable frequency electrical energy, achieving energy savings. Since different working conditions require different motor power (e.g., slow speed and low power demand during travel, and speed adjustment based on rock hardness during drilling), the frequency converter can precisely match the motor's output power to the working condition by changing the output frequency. For example, reducing the frequency during travel lowers the motor speed and reduces energy consumption; adjusting the frequency based on rock hardness during operation avoids energy waste from high-power idling, achieving the core goal of energy-saving control. Furthermore, the frequency converter drive solution completely eliminates redundant auxiliary components such as fuel tanks, mufflers, exhaust gas treatment devices, and cooling systems required by traditional diesel engine drives. The miniaturized frequency converter, adapted for mining, with its compact structural design, can significantly reduce the space and weight of the drilling rig drive system, better meeting the size requirements of micro hydraulic mining drilling rigs.

[0029] This utility model provides an energy-saving control device for a miniature hydraulic mining drilling rig. It eliminates the diesel engine, employing a frequency converter and lithium-ion battery drive. The frequency converter matches load requirements through speed adjustment, reducing energy consumption compared to a diesel engine. Furthermore, this drive method produces no exhaust emissions throughout the entire process, significantly reducing operating noise and effectively improving the working environment in the confined and narrow spaces of underground mines. The mining-grade explosion-proof lithium-ion battery possesses explosion-proof characteristics that meet mining safety standards, stably adapting to the harsh working environment of flammable, explosive, and high-dust conditions underground, completely avoiding the safety hazards caused by the poor explosion-proof performance of traditional ordinary batteries. The use of frequency converter drive reduces space and weight. The energy-saving control device constructs an intelligent control system through a two-way communication link between the on-board controller, distributed control system, and frequency converter, overcoming the shortcomings of unstable PLC control and low automation in existing technologies.

[0030] In one optional embodiment, the device further includes a 24V control system, which is connected to an external AC380V power supply and a mining explosion-proof lithium-ion battery, respectively, for powering the electrical components inside the control cabinet. The external AC380V power supply is connected to the frequency converter in sequence through a first circuit breaker and a first contactor, and is also connected to the 24V control system through the first circuit breaker and a first power module. The mining explosion-proof lithium-ion battery is connected to the DC bus of the frequency converter in sequence through a second circuit breaker, a fuse, and a second contactor, and is also connected to the 24V control system through the second circuit breaker and a second power module.

[0031] Specifically, the drilling rig adopts a power supply design for different working conditions. In the traveling mode, a mining explosion-proof lithium-ion battery drives the tracked chassis via a motor, while in the working mode, an external AC 380V power supply is used. Its electrical system is equipped with two independent power supply circuits, and a selector switch enables selective operation of one of the two power sources. The specific power supply logic is as follows: When an external AC380V power supply is used for operation, this power supply is connected to the frequency converter via the first circuit breaker QF1 and the first contactor KM3 to power the frequency converter and drive the main motor. Simultaneously, the external AC380V power supply also converts the voltage through the first circuit breaker QF1 and the first power module V1 to power the 24V control system. For detailed circuit information, please refer to [reference needed]. Figure 2 .

[0032] When the explosion-proof lithium-ion battery (DC320V) supplies power for the mobile operation, this power supply is connected to the DC bus of the frequency converter via the second circuit breaker F1, fuse FU2, and contactor KM4 to power the frequency converter and drive the main motor. Simultaneously, the explosion-proof lithium-ion battery (DC320V) also converts the voltage to 24V for the control system via the second circuit breaker F1 and the second power module V2. For detailed circuit information, please refer to [reference needed]. Figure 3 .

[0033] In one alternative implementation, such as Figure 4 As shown, the battery box of the explosion-proof lithium-ion battery for mining is divided into three parts: the battery compartment, the power distribution compartment, and the wiring compartment. The battery module is placed in the battery compartment, the battery management system is placed in the power distribution compartment, and the explosion-proof terminals for external output are provided in the wiring compartment.

[0034] Specifically, it consists of a mine-use explosion-proof lithium-ion battery power supply and supporting cables, and other auxiliary equipment, such as... Figure 4 As shown, the entire battery box is divided into three main chambers: the battery chamber, the power distribution chamber, and the wiring chamber. The battery chamber is mainly used to house the battery modules and is the core area for energy storage. The power distribution chamber is dedicated to housing the power management system, high-voltage cables, and high-voltage devices, and is responsible for power distribution and control. The wiring chamber is equipped with explosion-proof terminals for external output, serving as the connection interface between the battery system and external devices.

[0035] The battery system's operating status is monitored and protected in real time by the Battery Management System (BMS). The BMS dynamically collects key parameters such as individual cell voltage, total battery pack voltage, battery temperature, and charging / discharging current. It also provides comprehensive safety protection functions against overvoltage, overcurrent, overtemperature, overcharge, over-discharge, and short circuits, ensuring stable and safe operation of the battery in underground mining conditions. Overvoltage, undervoltage, overload, short circuit, and phase loss protection functions for the main motor are directly implemented through the frequency converter. The lithium battery's operating status (including current, temperature, SOC, and alarm information) is collected in real time by the BMS and transmitted to the vehicle controller via the CAN bus. The vehicle controller then triggers the relevant protection functions. Routine operation commands are sent by the remote control. After receiving the commands, the vehicle controller controls the hydraulic valves of the drilling rig to complete the corresponding operation.

[0036] Regarding high-voltage power distribution and insulation detection: the Battery Management System (BMS) can control the status of high-voltage power distribution switches in real time and simultaneously perform high-voltage insulation detection, thereby achieving high-voltage leakage protection. The system uses a positive control method for high-voltage power distribution output. A manual on / off switch for low-voltage power is specifically installed inside the battery box. Simultaneously, the system employs a scientifically sound charging and discharging control mode, with independent on / off switch circuits configured for each charging and discharging process. Furthermore, it supports management of high-voltage power distribution via external control signals. Battery performance is shown in Table 1. Table 1

[0037] In one alternative implementation, such as Figure 5 As shown, the device also includes a charging pile or a portable charger, wherein the charging pile or portable charger is connected to the mining explosion-proof lithium-ion battery and is used to charge the mining explosion-proof lithium-ion battery.

[0038] Specifically, the charging piles are 30kW fast charging piles, which are centralized fast charging devices located in fixed sites. They need to be connected to the mine's fixed AC380V industrial power supply to quickly replenish the batteries through high-power output, solving the need for efficient charging after long-term drilling operations. The portable chargers are 15kW mobile chargers, which are mobile emergency slow charging devices for safe locations. They can be connected to the on-site 380V power supply, are small in size, and portable, solving the emergency charging needs of drilling rigs when they cannot return to the fixed charging point from the work site or other safe charging locations.

[0039] In one alternative implementation, such as Figure 5 As shown, the device also includes a display screen, which is connected to the distributed control system and is used to display the working status of the miniature hydraulic mining rig.

[0040] Specifically, the display screen establishes a direct communication connection with the distributed control system (usually using mining-compatible communication methods such as RS485 or CAN bus), receives standardized data integrated by the distributed control system, and then presents it in a visual interface, avoiding the problems of complex wiring and signal interference caused by the display screen being directly connected to multiple components.

[0041] In one alternative implementation, the distributed control system adopts a master-slave control mode.

[0042] Specifically, the distributed control system adopts a master-slave control architecture. The master station is deeply integrated with the vehicle controller, relying on the hardware resources and control logic of the vehicle controller to form the control center of the entire system. It is responsible for uniformly generating control commands, summarizing the status data of each component, and executing core decisions. Each slave station establishes a stable communication connection with the frequency converter, battery management system (BMS), and hydraulic valves through a mining explosion-proof CAN bus. On the one hand, the slave station undertakes the distributed acquisition function, collecting the operating status of the corresponding components in real time (such as the output current and fault signals of the frequency converter, the cell voltage and SOC of the battery management system, and the valve opening and action feedback of the hydraulic valve). On the other hand, it undertakes the command execution function, receiving control commands issued by the master station (such as the speed adjustment command of the frequency converter, the charge and discharge permission command of the battery management system, and the action switching command of the hydraulic valve) and executing them accurately, realizing the decentralized processing of control tasks and ensuring the stable operation of the system.

[0043] This utility model provides a miniature hydraulic mining drill rig, including the energy-saving control device for the miniature hydraulic mining drill rig described in the above embodiments.

[0044] Specifically, the structure of a miniature hydraulic mining drill rig is as follows: Figure 6 As shown, the system includes: a frequency converter, a lithium battery, a charging device, a control cabinet, and a main motor. The lithium battery is a mining-grade explosion-proof lithium-ion battery. The charger includes a charging pile and an on-board charger, both of which are connected to the mining-grade explosion-proof lithium-ion battery for charging. The control cabinet integrates an on-board controller, a distributed control system, and a 24V control system. The on-board controller communicates with the distributed control system, and the 24V control system supplies power to the electrical components within the control cabinet.

[0045] Furthermore, the miniature hydraulic mining drill rig adopts a modular structure design, with a maximum width of only 0.98 meters. It is specifically designed for narrow operating scenarios in small tunnels and thin vein mines, and can flexibly adapt to the needs of underground mining in narrow spaces. To match the miniaturized design of the drill rig itself, the system's power supply devices (such as explosion-proof lithium-ion batteries for mining) and control devices (such as control cabinets and frequency converters) also adopt a miniaturized structure design, ensuring that the overall size of the drill rig meets the space limitations of small tunnels and avoiding the inability to enter narrow tunnels due to excessive equipment size.

[0046] In terms of power supply logic, the system adopts a working condition-specific power supply design: in the walking condition, the motor is driven by a mining explosion-proof lithium-ion battery to move the drilling rig's tracked chassis; in the working condition, it switches to an external AC380V power supply to provide continuous and stable power support for the drilling rig's drilling operations, taking into account both mobility and operational reliability.

[0047] In one alternative implementation, the system further includes a remote controller, which is wirelessly connected to the vehicle controller and is used to send routine operation commands to the vehicle controller.

[0048] Specifically, the matching remote control is the remote operation terminal of the mini hydraulic mining drill rig. By establishing wireless communication with the vehicle controller, it enables the remote issuance of commands for routine operations of the drill rig. It is primarily adapted to scenarios where mine tunnels are narrow and the operating environment is complex.

[0049] The miniature hydraulic mining rig provided by this utility model features a modular design for the rig body, coupled with a miniaturized frequency converter and lithium-ion battery. Its overall size is compact, allowing it to operate in narrow tunnels with a width of less than 1 meter, thus breaking through the spatial limitations of thin ore vein mining.

[0050] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An energy-saving control device for a miniature hydraulic mining drilling rig, characterized in that, The device includes: a frequency converter, a mining explosion-proof lithium-ion battery, an on-board controller, a distributed control system, and a main motor. An external AC380V power supply is connected to the first power supply terminal of the frequency converter to provide power for the drilling rig's operation. The mining explosion-proof lithium-ion battery is connected to the second power supply terminal of the frequency converter to provide power for the drilling rig's movement. The inverter establishes a communication connection with the distributed control system. The vehicle controller remotely controls the inverter's operating parameters and collects the inverter's operating status in real time through bidirectional communication with the distributed control system. The output of the frequency converter is connected to the main motor of the drilling rig, and drives the motor to operate by outputting adjustable frequency electrical energy to match the power requirements of the drilling rig under different working conditions.

2. The energy-saving control device for the micro hydraulic mining drill rig according to claim 1, characterized in that, The device also includes a 24V control system, which is connected to an external AC380V battery and the mining explosion-proof lithium-ion battery, respectively, to supply power to the electrical components inside the control cabinet.

3. The energy-saving control device for the micro hydraulic mining drill rig according to claim 2, characterized in that, An external AC380V power supply is connected to the frequency converter in sequence through a first circuit breaker and a first contactor, and the external AC380V power supply is connected to the 24V control system through the first circuit breaker and the first power module.

4. The energy-saving control device for the micro hydraulic mining drill rig according to claim 2, characterized in that, The mining explosion-proof lithium-ion battery is connected to the DC bus of the frequency converter in sequence through a second circuit breaker, a fuse, and a second contactor, and the mining explosion-proof lithium-ion battery is connected to the 24V control system through a second circuit breaker and a second power module.

5. The energy-saving control device for the micro hydraulic mining drill rig according to claim 1, characterized in that, The battery box of the mining explosion-proof lithium-ion battery is divided into three parts: battery chamber, power distribution chamber, and wiring chamber. The battery module is placed in the battery chamber, the battery management system is placed in the power distribution chamber, and the explosion-proof terminal for external output is provided in the wiring chamber.

6. The energy-saving control device for the micro hydraulic mining drill rig according to claim 1, characterized in that, The device further includes: a charging pile or a portable charger, wherein... The charging pile or the portable charger is connected to the mining explosion-proof lithium-ion battery for charging the mining explosion-proof lithium-ion battery.

7. The energy-saving control device for the micro hydraulic mining drill rig according to claim 1, characterized in that, The device also includes a display screen, which is connected to the distributed control system and is used to display the working status of the miniature hydraulic mining rig.

8. The energy-saving control device for the micro hydraulic mining drill rig according to claim 1, characterized in that, The distributed control system adopts a master-slave control mode.

9. A miniature hydraulic mining drill rig, characterized in that, Includes the energy-saving control device for the miniature hydraulic mining drill rig as described in any one of claims 1-8.

10. The miniature hydraulic mining drill rig according to claim 9, characterized in that, Also includes: The remote controller is wirelessly connected to the vehicle controller and is used to send routine operation commands to the vehicle controller.

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