1.Overview

At present, the copper mining enterprises in our country generally have the problems of unstable operation, low energy efficiency and difficult to adapt to the change of market demand. Therefore, the introduction of FGI FD5000 high voltage inverter to improve the stability of the system, to achieve precise control of the pump, to achieve the optimal effect.In the practical application of the hydraulic coupling, the following problems are found: first, the motor is difficult to start, due to heavy mud or mortar deposition, resulting in overload protection of the motor, sometimes 3-4 starts; Second, the failure rate of the hydraulic coupler is higher and the maintenance cost is higher. Third, the speed adjustment unit of the hydraulic coupling has been damaged, so manual adjustment is cumbersome.

2. Implementation plans

We chose the FGI FD5000 high voltage inverter, which is optimized for energy efficiency based on advanced control technology. FD5000 high voltage inverter applies advanced vector control technology, which can accurately control the working condition of high voltage system, and achieve the purpose of energy saving and consumption reduction. FD5000 high voltage frequency inverter speed regulation system is an intelligent energy consumption management system, which can monitor the heating situation of the user in real time, and automatically adjust the operating parameters of the system, so that it can achieve the optimal state and achieve the purpose of energy saving and consumption reduction. The FD5000 high voltage inverter works stably and reliably, and can operate stably in bad weather environment for a long time, reducing faults and improving system reliability.

In response to the failure of the hydraulic coupling, we decided to remove the coupling so that the motor is directly connected to the water pump. The frequency inverter is connected to the original high voltage switch and the motor to be modified, and the frequency inverter is connected to the original DCS system. In order to guarantee the reliable operation of the system, power frequency bypass is adopted in the original mud pump control device and operation mode. The power frequency / frequency conversion operation switch of the control circuit is selected, and the power / frequency conversion selection is operated by manual switching to realize the operation of mortar pump in power frequency or frequency conversion. At present, the existing DCS system can realize the real-time monitoring of the working parameters and current working conditions of the inverter. In terms of operation mode, remote control or on-site remote control can be used to enhance safety. The machine uses PLC to process the switching signal in the cabinet logically, and can cooperate with a variety of working signals and status information such as RS-485, and can increase the number of control switches according to customer requirements, which improves the flexibility of the system.

3.Application advantage

(1)Improve system stability

FD5000 high voltage frequency inverter speed regulation technology and stability enhancement technology ensure high stability and low failure rate of mortar pump.

(2)Energy costs are reduced

Using efficient power conversion technology improves the energy efficiency of the system, reduces the energy cost, and realizes economic benefits for enterprises.

(3)Intelligent monitoring and maintenance

This paper introduces a monitoring system of pump running condition based on intelligent monitoring technology, and carries on remote maintenance to it, reduces the downtime and maintenance cost.

(4)Reduce maintenance costs

After the use of frequency conversion technology, most of the time, the speed of the pump is much lower than the rated speed. The pump starts slowly, the speed is small, the wear is less, the service life is long.

(6)Reduce labor intensity

The modified valve is controlled by constant liquid level without adjustment. On this basis, the traditional manual work is changed to automation and intelligence, so that the labor intensity of the operators has been greatly reduced.

(7)The magnetic field noise is effectively reduced

It improves the production environment and facilitates the automatic management of the pump unit.