LPS-WSM-600 Wet Shotcrete Machine

Figure 1a illustrates cylinders 1 and 2 are the hydraulic actuator cylinders to move the 3 and 4 the material delivering cylinders. While hydraulic cylinder 1 is returning back and the material cylinder 3 is at the intake period, takes in the concrete inside, simultaneously the hydraulic cylinder 2 goes to the arrow direction and material cylinder 4 is at the delivering period to pump the material towards the s-tube 5. The s-tube is driven by two other hydraulic cylinder actuators attached to the lever. Before material cylinder 4 begins to push the material to arrow direction s-tube positions itself in front of the cylinder 4 to connect the output gateway.

Figure 1b illustrates cylinders 1 and 2 are the hydraulic actuator cylinders to move the 3 and 4 the material delivering cylinders. While hydraulic cylinder 2 is returning back and the material cylinder 4 is at the intake period, takes in the concrete inside, simultaneously the hydraulic cylinder 1 goes to the arrow direction and material cylinder 4 is at the delivering period to pump the material towards the s-tube 5. Figure 2a  shows how the s-tube changes the position in front of the material  cylinder 3 during pushing out material and at the same time material cylinder 4 is sucking in from the material hopper. Figure 2b illustrates the next machine cycle and works as the same as figure 2a.

Conventional s-tube system is made of stainless alloy steel  instad of cast iron. Light s-tube provides lower power demand for toggle cylinders and frictional forces against the material in the hopper so hydraulic power consumption of s-tube cylinders. Reduced hydraulic power need eliminates thermal problems and cooling requirements in desert and hot climate applications.  

Flexible application area, plc controller based dynamic software and control features provide usage elasticity between different kinds of materials, delivering pressure and capacity. Adjustable power factor, piston period and additive pump flow rate ensures throwing out different kinds of materials. Additive mixing rate can be adjusted by the additive pump motor speed via an ac motor converter with a potentiometer.

Steel valve block is especially desined for this machine’s hydraulic circuit to simplify the oil ways and hoses. Reduced hydraulic-oil routes and simplicity of the oil circuit gains the system pressure so keeps the total system resistance at acceptable values, increasing system stability with aspect of circulation flow rate values, pressure per unit surface and thermal coefficiency.

PLC controller is the central processing device that gathering all necessary data, buttons at control box, pressure sensors, position sensors, electric and logic levels, signals. Then activates the pistons, motors hydraulic oil pump and make all decisions. Diagnostic indicators can give information about any faulty conditions. This feature is very important especially for operator and contsruction site safety.

Reverse operation is a feature for preventing blocage of pumping system, pipes and material hose. Cleaning the system after operation is easier with this feature. Material in the system and hose is discharged by the reverse working of pistons through a function of programmable logic controller. To wash inside the delivery cylinders, single cycle reverse operation is a useful function.

Additive pump flow rate control function is for adjusting more accurately the cement mixture hardening period. Additive pump motor is controlled via an ac motor converter for adjusting the flow rate by a potentiometer outside the control box. Maximum capacity of 1 cubic meter can mixed up per hour or can be decreased to 100 litres per hour. 

Additive material mixeing system specifications:

Hydrolic system specifications: