阅读说明：本技术 多电机同步控制系统及带式输送机 (Multi-motor synchronous control system and belt conveyor ) 是由 牟宗魁 陈元首 张海军 胡勇 宋惜飞 陈智奎 于 2020-05-15 设计创作，主要内容包括：本发明公开了一种多电机同步控制系统及带式输送机,包括DCS系统和PLC控制站；DCS系统与PLC控制站之间控制连接；DCS系统和PLC控制站分别同时监测多台电机的运行状态,并由DCS系统控制多台电机的同步运行。本发明的带式输送机多电机同步控制,DCS系统中的操作员站输入每台电机的调整值,同时,在显示界面,实时观察调整效果,使用简单、灵活方便,不需要专业技术人员,即可实现,降低了设备的使用要求；解决了多电机同步控制不平衡的问题,实时协调处理各台电机运行状态,保持输送机长期稳定运行。(The invention discloses a multi-motor synchronous control system and a belt conveyor, which comprise a DCS system and a PLC control station; the DCS is connected with the PLC control station in a control mode; the DCS system and the PLC control station respectively and simultaneously monitor the running states of the motors and the DCS system controls the synchronous running of the motors. According to the belt conveyor multi-motor synchronous control system, the operator station in the DCS system inputs the adjustment value of each motor, and meanwhile, the adjustment effect is observed in real time on a display interface, so that the belt conveyor multi-motor synchronous control system is simple, flexible and convenient to use, can be realized without professional technicians, and reduces the use requirement of equipment; the problem of multi-motor synchronous control unbalance is solved, the running states of all motors are coordinated and processed in real time, and the long-term stable running of the conveyor is kept.)

1. A multi-motor synchronous control system is characterized in that: the system comprises a DCS system and a PLC control station; the DCS is in control connection with the PLC control station; the DCS system and the PLC control station respectively and simultaneously monitor the running states of the motors, correspondingly collect calculated values and actual value data of the running of the motors, and the DCS system controls the synchronous running of the motors.

2. The multi-motor synchronous control system according to claim 1, characterized in that: the device also comprises a frequency converter; the DCS system and the PLC control station are respectively communicated and electrically connected with the plurality of frequency converters; one frequency converter correspondingly monitors one motor.

3. The multi-motor synchronous control system according to claim 2, characterized in that: each frequency converter is provided with a DP communication module; and the frequency converter is in communication connection with the DCS system and the PLC control station through the DP communication module.

4. The multi-motor synchronous control system according to claim 3, characterized in that: and the DP communication module transmits the calculated value of the collected motor data to the DCS system and the PLC control station.

5. The multi-motor synchronous control system according to claim 1, characterized in that: and a synchronous control module is arranged on the DCS and performs feedback control aiming at the running state of the motor.

6. The multi-motor synchronous control system according to claim 1, characterized in that: also comprises a multifunctional box; the DCS system and the PLC control station are respectively in communication connection with the multiple multifunctional boxes; a multifunctional box is electrically connected with a motor.

7. The multi-motor synchronous control system according to claim 6, characterized in that: a wireless network sending module is arranged in the multifunctional box; a wireless network receiving module connected with the wireless transmitting module is arranged in the DCS system and the PLC control station; the multifunctional box transmits the actual value of the collected motor to the DCS system and the PLC control station.

8. A multi-motor synchronous control system according to claim 1, 2 or 6, characterized in that: the DCS system and the PLC control station are respectively provided with a speed module, a torque module, a current module, a power module and a voltage module, and the speed module, the torque module, the current module, the power module and the voltage module are used for monitoring actual rotating speed, torque, current, power and voltage data of the motor; and sensors which are correspondingly matched with a speed module, a torque module, a current module, a power module and a voltage module which are arranged in the DCS system and the PLC control station are respectively arranged on each motor.

9. A belt conveyor, characterized in that: a multi-motor synchronous control system including a system according to any one of claims 1 to 7.

Technical Field

The invention relates to the technical field of belt conveyors under multi-working-condition conditions, in particular to a multi-motor synchronous control system and a belt conveyor.

Background

At present, belt conveyors are widely used in the fields of electric power, steel, coal, water conservancy, chemical industry, metallurgy, building materials and the like, and meanwhile, belt conveyor systems are developing towards large-scale production with high belt speed, high power, large transportation capacity and long distance.

In practical applications, such large belt conveyors usually adopt a multi-motor driving mode in order to reduce the strength of the conveying belt, and a plurality of motors are arranged in groups at a long distance. For a multi-motor driving system, because of manufacturing errors of motors and rollers and installation errors of equipment, the motors can generate rotation speed difference, the smaller rotation speed difference does not cause great influence on the operation of the equipment, but if the rotation speed difference is larger, the roller which rotates fast is stressed greatly, the roller which rotates slowly and a conveyor belt rub relatively, power consumption is realized, resistance is formed, the total driving power is reduced, the imbalance of the power of the motors is easily caused, and the slippage between the conveyor belt and the roller is easily caused, so that the coordination of the operation state of each motor is the key of the long-term stable operation of the conveyor.

Disclosure of Invention

In order to overcome the technical defects, the invention aims to provide a multi-motor synchronous control system and a belt conveyor, which are implemented to solve the problem of unbalance of multi-motor synchronous control, collect calculated values and actual value data of actual operation of a plurality of motors, control the synchronous operation of the plurality of motors by a DCS (distributed control system), coordinate and process the operation state of each motor in real time and keep the long-term stable operation of the conveyor.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the technical scheme is that the multi-motor synchronous control system comprises a DCS system and a PLC control station; the DCS is in control connection with the PLC control station; the DCS system and the PLC control station respectively and simultaneously monitor the running states of the motors, correspondingly collect calculated values and actual value data of the running of the motors, and the DCS system controls the synchronous running of the motors.

Further preferably, the system also comprises a frequency converter; the DCS system and the PLC control station are respectively communicated and electrically connected with the plurality of frequency converters; one frequency converter correspondingly monitors one motor.

Preferably, each frequency converter is provided with a DP communication module; and the frequency converter is in communication connection with the DCS system and the PLC control station through the DP communication module.

Further preferably, the DP communication module transmits the calculated value of the collected motor data to the DCS system and the PLC control station.

Preferably, a synchronous control module is arranged on the DCS system, and feedback control is performed according to the running state of the motor.

Further preferably, the multifunctional box is further included; the DCS and the PLC control station are respectively in communication connection with the plurality of multifunctional boxes; a multifunctional box is electrically connected with a motor.

Further preferably, a wireless network sending module is arranged in the multifunctional box; a wireless network receiving module connected with the wireless transmitting module is arranged in the DCS system and the PLC control station; the multifunctional box transmits the collected actual values of the motor to the DCS system and the PLC control station.

Preferably, the DCS system and the PLC control station are respectively provided with a speed module, a torque module, a current module, a power module and a voltage module, and the speed module, the torque module, the current module, the power module and the voltage module are used for monitoring the actual rotating speed, torque, current, power and voltage data of the motor; and sensors which are correspondingly matched with a speed module, a torque module, a current module, a power module and a voltage module which are arranged in the DCS system and the PLC control station are respectively arranged on each motor.

The technical scheme also relates to a belt conveyor which comprises the multi-motor synchronous control system.

The invention has the beneficial effects that:

according to the multi-motor synchronous control and belt conveyor, the operator station inputs the adjustment value of each motor, and meanwhile, the adjustment effect is observed in real time on the display interface, so that the multi-motor synchronous control and belt conveyor is simple, flexible and convenient to use, can be realized without professional technicians, and reduces the use requirement of equipment; the problem of multi-motor synchronous control unbalance is solved, the running states of all motors are coordinated and processed in real time, and the long-term stable running of the conveyor is kept.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of the connection relationship of the systems in the present invention.

Fig. 2 is an electrical flow block diagram of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Taking the example of monitoring the running states of 4 motors in real time in the running process of the belt conveyor as follows: as shown in fig. 1 and 2, the DCS system is connected to the PLC control station through an optical fiber; the DCS is connected with the frequency converter 1 and the frequency converter 2 through DP wires and cables respectively; the DCS is connected with the multifunctional box 1 and the multifunctional box 2 through a wireless network;

the PLC control station is connected with the frequency converter 3 and the frequency converter 4 through DP wires and cables respectively; the PLC control station is connected with the multifunctional box 3 and the multifunctional box 4 through a wireless network; multifunctional box 1 and motor 1, multifunctional box 2 and motor 2, multifunctional box 3 and motor 3, between multifunctional box 4 and the motor 4, through cable junction. The frequency converter 1 and the frequency converter 2 feed back the data calculation values of the motor 1 and the motor 2 to the DCS in real time; the frequency converter 3 and the frequency converter 4 feed back the data calculation values of the motor 3 and the motor 4 to the PLC control station in real time; the multifunctional box 1 and the multifunctional box 2 feed back the acquired actual values of the data on the motor 1 and the motor 2 to the DCS in real time; the multifunctional box 3 and the multifunctional box 4 feed the acquired actual data values of the motor 3 and the motor 4 back to the PLC control station in real time. The PLC control station calculates the arithmetic mean of the received calculated value and actual value data, transmits the arithmetic mean to the DCS system, judges and processes the arithmetic mean, and executes the instruction issued by the DCS system; the DCS system calculates and averages the received calculated value and actual value data, judges, processes, stores and displays the calculated value and the actual value data, and simultaneously issues an operation instruction.

As shown in fig. 2, if the torque difference between any two motors is greater than 3% of the rated value, but does not reach 7% of the set protection value, the synchronous adjustment button is clicked through the operator station interface, the adjustment value is manually input in a pop-up dialog box, the torque input value of the high-torque motor corresponding to the frequency converter is reduced by 5 per mill, and the operation effect is continuously observed through the display interface for 3-5 min. And if the torque difference is reduced and is less than 3%, finishing the adjustment and keeping running. And if the torque difference is not obviously changed, continuing to adjust and observing the effect until the torque difference is less than 3%, and finishing the adjustment.

The whole system of the belt conveyor completes the hardware connection, writes software codes, sets a sensor configured for each motor after related parameters are normally started to operate, measures the actual rotating speed, torque, current, power and voltage values of the motors in real time, and respectively transmits the actual values of the motors to a DCS system and a PLC control station through a multifunctional box corresponding to the actual values of the motors; meanwhile, the frequency converter transmits calculated values of the rotating speed, the torque, the current, the power, the voltage and the like of the motor to a DCS system and a PLC control station through a DP communication module respectively; DCS system and PLC control station are through the calculated value and the actual value of each motor of compiling code program real time monitoring collection to get the arithmetic mean value and carry out analysis and judgement, effectively avoid in the actual motion, when only taking the calculated value as the judgement condition, because of the misadjustment that too big error caused to and when only taking the actual value as the judgement condition, because of the misjudgement that sensor trouble or interference etc. caused, improved the reliability and the security of system. And if the data are not abnormal, normally operating according to the program. If the data is abnormal and exceeds the set protection value, the machine is immediately and automatically stopped, and the machine is checked and processed. If the data is abnormal but not exceeds the set protection value, but the data is in a worsening trend in long-term operation, the synchronous control function block is called, and the adjusting program is executed. And the interface of the operator station is provided with an interactive interface, and the interactive interface can write the torque adjustment value of each motor respectively. Each frequency converter is provided with a control line for transmitting instructions such as start, stop and emergency stop issued by the PLC control station.

In practical use, any one or combination of a plurality of values of rotating speed, torque, current, power and voltage can be used as the judgment condition, and the judgment index and the adjustment mode can be modified correspondingly.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.