Hydraulic Grouting Pump Structure and Principle

A hydraulic grouting pump primarily consists of a mixer, suction and discharge valve assembly, oil cylinder, grouting cylinder, reversing mechanism, oil cooler, oil tank, hydraulic oil pump, electric motor, relief valve, reversing valve, and pressure gauge.

The operating principle is as follows: Because the cylinder piston rod and the grouting cylinder piston rod are directly connected, when high-pressure oil generated by the oil pump pushes the piston in the cylinder back and forth, the grouting cylinder piston also reciprocates, cooperating with the suction and discharge valve assembly to complete the grouting operation. The piston rod's shift fork activates the reversing mechanism, driving the reversing valve to achieve reversal. The ZBYS engineering version's reversing mechanism utilizes a solenoid-operated pilot valve to achieve reversal.

The ZBYS coal mine hydraulic grouting pump is a bottom-stroke, high-thrust hydraulic reciprocating grouting pump.

It features stepless adjustment of discharge volume and pressure. It can inject single-liquid slurries, dual-liquid slurries, and chemical slurries. It is a single-cylinder, double-acting grouting pump.

The main difference between the two types of pumps lies in their reversing methods.