Motor control system based on transformation of mine conveying equipment

Abstract

The utility model relates to the technical field of mine intelligent equipment, in particular to a motor control system based on transformation of mine conveying equipment, the conveying equipment is driven by a motor, the motor is a permanent magnet motor, and the control system comprises an upper computer, a display screen, a PLC (Programmable Logic Controller) and an alarm mechanism, the alarm mechanism comprises a first alarm unit connected with a shell of the permanent magnet motor and a second alarm unit connected with the upper computer, and the permanent magnet motor is provided with a safety protection mechanism. The problems that an original conveying equipment motor system is complex in structure, large in fault number, large in power consumption, high in maintenance difficulty and incapable of achieving automatic control are solved, a whole set of control system for the permanent magnet motor is established, normal requirements of mine work can be met, systematic safety protection can be conducted on the permanent magnet motor, and the safety of the mine is improved. And huge economic loss caused by motor damage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of intelligent mining equipment technology, specifically to a motor control system based on the modification of mining conveying equipment. Background Technology

[0002] Mining enterprises involve a large number of conveying equipment, which are driven by electric motors. These include asynchronous motors with matching reducers used to drive conveyor belts in the ore dressing workshop; dust removal motors in the primary crushing section; and precious metal pump motors in the cyanide smelting workshop. These motors operate at full load for extended periods, and failures can result in significant economic losses. However, most existing motors consist of traditional motor drive devices and transmission mechanisms, resulting in complex structures, high failure rates, and heavy maintenance workloads. These motors also experience excessive temperature rise, abnormal noise, or excessive vibration; significant mechanical impacts on the transmission system from instantaneous current surges and torque fluctuations during startup; and high energy consumption and low efficiency. Furthermore, they draw large amounts of reactive current from the power grid, causing excessive load on the power transmission and transformation system, leading to a decrease in the grid's quality factor and further burdening transmission and transformation equipment and power generation equipment. Therefore, the applicant proposes to reform the main motor equipment and its management structure in mining enterprises. Summary of the Invention

[0003] In order to solve the existing technical problems described in the background art, this invention discloses a motor control system based on the modification of mining conveying equipment.

[0004] To achieve the above objectives, the technical solution of this invention is as follows:

[0005] A motor control system based on the modification of mining conveying equipment is disclosed. The conveying equipment is driven by a permanent magnet motor. The control system includes a host computer, a display screen, a PLC controller, and an alarm mechanism. The host computer is electrically connected to a power module and to the display screen and PLC controller via wires. The PLC controller is electrically connected to the control circuit of the permanent magnet motor of each conveying device via wires. The alarm mechanism includes an alarm unit one connected to the housing of the permanent magnet motor and an alarm unit two connected to the host computer. The alarm unit one and alarm unit two are electrically connected to the PLC controller. The permanent magnet motor is equipped with a safety protection mechanism.

[0006] Preferably, the safety protection mechanism includes a vibrator mounted on the base of the permanent magnet motor, and the vibrator is electrically connected to the PLC controller via a wire.

[0007] Preferably, the safety protection mechanism further includes a temperature and humidity sensor mounted on the housing of the permanent magnet motor, which is electrically connected to the PLC controller via a wire.

[0008] Preferably, the PLC controller is electrically connected to the permanent magnet motor through a distribution box, and the distribution box is equipped with an overvoltage protection module.

[0009] Preferably, the PLC controller is equipped with a timing module, and is electrically connected to the permanent magnet motor through the timing module.

[0010] Preferably, the host computer is equipped with a workload input module and a permanent magnet motor working status and working time setting module based on workload analysis. The working status refers to the state of operation at rated power, and the working time refers to the time during which the motor can operate safely at rated power and complete the workload to the maximum extent.

[0011] Preferably, the permanent magnet motor is located in a motor room, which is equipped with a temperature and humidity control mechanism.

[0012] Preferably, the motor room is equipped with a gas sensor and a gas controller, the gas sensor and the gas controller are electrically connected, an exhaust fan is installed on the side wall of the motor room, the gas controller is electrically connected to the exhaust fan, and the gas controller is electrically connected to the PLC controller via a wire.

[0013] The beneficial effects of this new type of motor control system based on the modification of mining conveying equipment are as follows:

[0014] This new invention not only overcomes the problems of complex structure, frequent malfunctions, high power consumption, high maintenance difficulty, and inability to achieve automated control in the original conveying equipment motor system, but also establishes a complete control system for permanent magnet motors. It can not only meet the normal needs of mine operations, but also provide systematic safety protection for permanent magnet motors, avoiding huge economic losses caused by motor damage. Attached Figure Description

[0015] Figure 1 : Schematic diagram of the overall frame structure of this novel invention.

[0016] Figure 2 : Structural block diagram of this new type of safety protection facility. Detailed Implementation

[0017] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0018] Based on the actual production situation, motor failures can cause significant economic losses to mining enterprises. Therefore, the applicant has designed this novel motor control system, the specific implementation methods of which include the following embodiments:

[0019] Example 1

[0020] A motor control system based on the modification of mining conveying equipment is disclosed. The conveying equipment is driven by motors and mainly includes an asynchronous motor + adaptable reducer used to drive the conveyor belt in the ore dressing workshop; a dust removal motor in the coarse crushing section; and a precious liquid pump motor in the cyanide smelting workshop. One improvement is to use permanent magnet motors. These permanent magnet motors employ sensorless vector control technology, achieving a stable and uniform speed start-up mode. This effectively avoids the mechanical impact on the transmission system caused by instantaneous current surges and torque fluctuations during conveyor motor startup, reducing the motor failure rate. Simultaneously, the permanent magnet motor direct-drive system uses internet technology to communicate and centrally control with a host computer, transmitting motor-related data to the central control room at high speed and with high precision, thereby achieving remote data transmission and centralized data processing. Furthermore, the control system includes a host computer, a display screen, a PLC controller, and an alarm mechanism. The host computer and power supply module... The circuit is electrically connected to the permanent magnet motor and to the display screen (used to display the working status information and alarm information of the permanent magnet motor) and the PLC controller via wires. The PLC controller is electrically connected to the control circuit of the permanent magnet motor of each conveying device via wires. The alarm mechanism includes alarm unit one connected to the housing of the permanent magnet motor (when the permanent magnet motor fails, alarm unit one will sound an alarm, preferably an audible and visual alarm) and alarm unit two connected to the host computer (the PLC controller sends the fault information of the permanent magnet motor to the host computer, and the staff will handle and intervene according to the alarm information). Alarm unit one and alarm unit two are electrically connected to the PLC controller. The permanent magnet motor is equipped with a safety protection mechanism, which is a protective facility for the permanent magnet motor. These protective facilities are also connected to the PLC controller signal, thereby enabling the permanent magnet motor to achieve automated safety protection.

[0021] Example 2

[0022] Based on Example 1, this example discloses:

[0023] The safety protection mechanism includes a vibrator mounted on the base of the permanent magnet motor, which is electrically connected to the PLC controller via wires. The PLC controller collects the vibration information of the permanent magnet motor. When abnormal vibration information occurs, it is identified as a fault signal, and management personnel should send someone to conduct on-site inspection and maintenance.

[0024] Example 3

[0025] Based on embodiments 1 and 2, this embodiment discloses:

[0026] The safety protection mechanism also includes a temperature and humidity sensor installed on the housing of the permanent magnet motor, which is electrically connected to the PLC controller via wires. When the temperature and humidity range exceeds the normal operating range of the permanent magnet motor, the permanent magnet motor is remotely shut down, and personnel are dispatched to the site for maintenance.

[0027] Example 4

[0028] Based on embodiments 1, 2, and 3, this embodiment discloses:

[0029] The PLC controller is electrically connected to the permanent magnet motor through a distribution box, which is equipped with an overvoltage protection module to prevent overvoltage from occurring.

[0030] Example 5

[0031] Based on embodiments 1, 2, 3, and 4, this embodiment discloses:

[0032] The PLC controller is equipped with a timing module, which is electrically connected to the permanent magnet motor to control the maximum running time of the permanent magnet motor and prevent the permanent magnet motor from running beyond the time limit.

[0033] Example 6

[0034] Based on embodiments 1, 2, 3, 4, and 5, this embodiment discloses:

[0035] The host computer is equipped with a workload input module and a permanent magnet motor working status and working time setting module based on workload analysis. The working status refers to the state of operation at rated power, and the working time refers to the time during which the motor can safely operate at rated power and complete the workload to the maximum extent.

[0036] Taking the precious liquid pump motor in the cyanide smelting workshop as an example, after replacing it with a permanent magnet motor, the operating time of the permanent magnet motor at its rated power is set based on the daily volume of liquid to be pumped. This time should be within the normal load range of the permanent magnet motor. If it exceeds this range, the daily pumping workload should be reduced or a new permanent magnet motor should be configured to ensure that the permanent magnet motor is in a healthy working condition. In actual operation, flow sensors can be installed on the pipeline to establish a correlation between the total flow information and the speed and operating time of the permanent magnet motor. Conversely, the operating time of the permanent magnet motor at its rated power can be set based on the total workload. The flow sensor can be connected to the PLC controller electrical signal. In the coarse crushing section, PM2.5 sensors can be installed in the working environment and connected to the PLC controller electrical signal. According to the size of the working environment, an appropriate number of dust removal motors can be set, and the operating time of each dust removal motor at its rated power when the control and treatment standard value is reached can be calculated. In the mineral processing workshop, the total daily mineral conveying volume is calculated based on the weight of the ore on the unit length of the conveyor belt. Based on the optimal operating time of each permanent magnet motor, a conveyor belt with an appropriate conveying volume is configured, which also means that an appropriate number of permanent magnet motors are configured.

[0037] Example 7

[0038] Based on embodiments 1, 2, 3, 4, 5, and 6, this embodiment discloses:

[0039] The permanent magnet motor is installed in a motor room, which is equipped with a temperature and humidity control mechanism, such as an air conditioner, a dehumidifier, and a ventilation system. Based on the signal from the temperature and humidity sensor in the motor room, the PLC controller starts the air conditioner, dehumidifier, or ventilation system to regulate the temperature and humidity in the motor room.

[0040] Example 8

[0041] Based on embodiments 1, 2, 3, 4, 5, 6, and 7, this embodiment discloses:

[0042] The motor room is equipped with a gas sensor and a gas controller. The gas sensor and the gas controller are electrically connected. An exhaust fan is installed on the side wall of the motor room. The gas controller is electrically connected to the exhaust fan. The gas controller is electrically connected to the PLC controller via a wire.

[0043] Since corrosive or toxic gases may be generated in mining workshops, preventing gas damage to motors is particularly important. In this embodiment, a gas sensor detects the gas concentration, and a gas controller controls the exhaust fan to reduce harmful gases in the motor room to a reasonable level, thus avoiding the impact of gas factors on the permanent magnet motor. In this embodiment, the gas controller can be a DR-ZJ108 type, and the gas sensor can be a GQ-DR600 type point gas detector. Alternatively, appropriate gas sensors and gas controllers can be configured according to actual needs.

[0044] This new invention, through the above-mentioned design, not only overcomes the problems of complex structure, frequent malfunctions, high power consumption, high maintenance difficulty, and inability to achieve automated control in the original conveying equipment motor system, but also establishes a complete control system for permanent magnet motors. This system can not only meet the normal needs of mine operations, but also provide systematic safety protection for permanent magnet motors, avoiding huge economic losses caused by motor damage.

Claims

1. A motor control system based on the transformation of mine conveying equipment, characterized in that the conveying equipment is driven by a motor, the motor is a permanent magnet motor, the control system comprises a host computer, a display screen, a PLC controller and an alarm mechanism, the host computer is electrically connected with a power module and is electrically connected with the display screen and the PLC controller through wires respectively, the PLC controller is electrically connected with the control circuit of the permanent magnet motor of each conveying equipment through wires respectively, the alarm mechanism comprises an alarm unit one connected with the shell of the permanent magnet motor and an alarm unit two connected with the host computer, the alarm unit one and the alarm unit two are electrically connected with the PLC controller respectively, and the permanent magnet motor is provided with a safety protection mechanism.

2. A motor control system based on a retrofit of a mine conveyor installation as claimed in claim 1, characterized in that The safety protection mechanism comprises a vibrator arranged on the base of the permanent magnet motor, and the vibrator is electrically connected with the PLC controller through wires.

3. A motor control system based on the reconstruction of mine conveying equipment as claimed in claim 1, characterized in that The safety protection mechanism further comprises a temperature and humidity sensor arranged on the shell of the permanent magnet motor, and the temperature and humidity sensor is electrically connected with the PLC controller through wires.

4. A motor control system based on a retrofit of a mine conveyor installation as claimed in claim 1, characterized in that The PLC controller is electrically connected with the permanent magnet motor through a distribution box, and the distribution box is provided with an overvoltage protection module.

5. A motor control system based on a retrofit of a mine conveyor installation as claimed in claim 1, characterized in that The PLC controller is provided with a timing module and is electrically connected with the permanent magnet motor through the timing module.

6. A motor control system based on a retrofit of a mine conveyor installation as claimed in claim 1, characterized in that The host computer is provided with a work amount input module and a permanent magnet motor working state and working time setting module based on work amount analysis, the working state refers to the state of running at rated power, and the working time refers to the time of safely running at rated power and being able to complete the work amount to the maximum extent.

7. A motor control system based on the modification of a mine conveyor installation according to any one of claims 1 to 6, characterized in that: The permanent magnet motor is arranged in a motor room, and the motor room is provided with a temperature and humidity adjusting mechanism.

8. A motor control system based on a retrofit of a mine conveyor installation as claimed in claim 7, characterized in that The motor room is provided with a gas sensor and a gas controller, the gas sensor is electrically connected with the gas controller, an exhaust fan is installed on the side wall of the motor room, the gas controller is electrically connected with the exhaust fan, and the gas controller is electrically connected with the PLC controller through wires.

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