Comparison of various dosing methods-automatic ball adding machine

1. Principle of automatic dosing machine

1. Solenoid valve

According to the power supply coil of the automatic ball adding machine, the solenoid head generates pulling force, causing the valve to open and the medium to flow out. Each opening of the solenoid valve corresponds to the cancellation period and the amount of medicine flowing out corresponds. The control panel controls the number of starts of the solenoid valve through calculation, so as to achieve The effect of accurate dosing.

2. Metering pump

The frequency of each rotation of the metering pump motor is proportional to the output amount of medicine. The amount of medicine is changed according to the frequency of the control motor rotation. After calculation by the control board, the input amount of medicine is converted into the working frequency of the metering pump to change the medicine amount.

3. Automatic ball adding machine

The automatic ball adding machine is an auxiliary equipment for adding steel balls to the ball mill. It is suitable for adding steel balls. The specifications suitable for adding steel balls are customized according to the process. The capacity, etc. are customized items.

2.Dosing performance

1. Solenoid valve

The dosing error of the solenoid valve is about 1%-5%. The smaller the amount of medicine, the greater the error. The solenoid valve uses the differential pressure of the liquid level in the medicine storage tank to make the medicine flow downstream, and the accuracy is also affected by the liquid level. Large. Therefore, the solenoid valve must keep the liquid level in the medicine storage tank constant to ensure the accuracy of medicine dosing.

Solenoid valves are consumable parts, and their service life is generally 300,000 to 500,000 switching times. Solenoid valves are suitable for adding large flow amounts of medicine.

2. Metering pump

The dosing error of the automatic ball adding machine of the metering pump is about 0.1%-0.2%. The metering pump itself has suction, and the liquid level has no effect on it. There are loss parts in the body of the metering pump, and the service life of the loss parts is about 18- 24 months. When a consumable part is damaged, it must be replaced directly instead of the entire machine.