Concrete is pumped along a flexible arm called a boom using concrete boom pumps, sometimes referred to as truck-mounted pumps.
Concrete may be more easily directed to areas like the upper stories of high-rise buildings by extending and positioning the boom to nearly any spot on a construction site.
Boom pumps are generally employed on larger sites or those where entry is restricted to areas above immovable structures like walls or houses.
PARTS USED OF CONCRETE PUMPS: WHAT ARE THEY?
Each of the several parts of a concrete pump is essential to its efficient pumping of concrete. Think about the following crucial components of concrete pumps.
PRIMARY PUMP CIRCUIT
One of the most important components of a concrete boom pump is the primary pump circuit.These parts are part of the circuit that drives the pair of parallel hydraulic drive cylinders.
Piston pump:
An axial piston pump with variable displacement and a swashplate design powers the primary hydraulic power pump.
Concrete displacement is altered by varying the swashplate angle, which also modifies the pistons’ stroke length.
The swashplate angle increases with increased flow. Using the volume control and the load sense capability, operators can change the swashplate angle.
Motor:
The primary hydraulic pump is driven by a combustion or electric motor. The pump minimises the load on the oil pump and provides enough torque to keep the unit lubricated when the engine runs normally.
Valve manifold:
A valve on the main circuit regulates flow as well as the pilot-operated directional valve, check valve, relief valve, and check valve.
Throttle control:
The operator uses the throttle control to set the speed to the maximum RPM to activate the pump circuit.
Cycling circuit:
The cycling circuit is started as soon as the pump turns on. The directional valves are turned on by this circuit, which also produces an electrical signal.
Material cylinders:
The concrete is pumped by the two identical cylinders in turn. The material pumping operation is started by proximity sensors, which send an indication from the sensor array to the pump.
Relief valve:
This valve guards against excessive pressure in the main pump circuit. The relief valve is a device that opens to allow oil to return to the tank when the entire system stress reaches the maximum permitted level.
2. THE CIRCUIT OF S-TUBE SHIFT
The mechanism that moves the S-tube from a single cylinder to the next while pumping is controlled by this circuit.
Concrete needs to be moved from the container to the exit and then into the delivery line because there is only one outlet available for material pumping.
An S-tube in the hopper guarantees work completion. It should be simple to switch between the two cylinders since there is only one S-tube. By taking into account each of the remaining parts, we may comprehend this circuit.
Tandem pump:
Placed in a single part of the shift circuit, a tandem pump links to the main mechanical pump, which powers it, to meet the flow and pressure requirements.
Manifold block:
The shift circuit has manifold blocks, the same as that of the primary hydraulic circuit.
3. The circuit of auxiliaries
The auxiliary unit includes the hydraulic operation of the agitator. The agitation device and other extra equipment are managed by the circuit.
To combine the concrete in the feed and feed the cylinders, the agitator turns. The auxiliary circuit is supplied by the main circuit’s tandem pump.
An emergency stop circuit safety mechanism, such as a dump valve or solenoid cartridge, stops flow to the additional circuit when the user initiates it.
Pumping concrete large distances and high into the air is one of the most important uses of the auxiliary circuit. The following are some of this system’s primary parts.
Arm with wear-detecting holes:
The quench casting material is used in these holes found in concrete pump elbows. They improve safety and durability while also streamlining the ready-mixed concrete flow.
Outrigger:
This part widens the overhanging region and swings at a sharp angle to provide more substantial, stable movement.
The hopper’s U-shaped bottom:
This component makes it easier for the liquid concrete to first flow from the crusher into the inflow port. Because the ready-mixed concrete flows more efficiently and leaves less residual volume, cleaning is easier.
Power-driven suction pump:
This vacuum pump runs on batteries, which reduces pulsation and irregularities in the flow of concrete. This ingredient makes the mixture more uniform.
4. THE ARM THAT SPRAYS
The Concrete Boom Pump flow is positioned correctly by the spraying arm. The part can spray up to 56 feet, therefore telescopic elevating stations and scaffolding are not needed.
The spraying head blends air, elevators, and concrete. To ensure minimal rebound and proper concrete incorporation, the nozzle diameters and general layout are critical.
5. THE COMPRESSOR FOR AIR
The concrete receives its kinetic energy from the air compressor to be sprayed and compact.
Shotcrete must contact the site’s surface at a certain velocity, which can be attained with the right nozzle diameter and compressor airflow.
6. THE PUMP THAT ADJUSTS
By accelerating the concrete’s hardening process, the accelerator satisfies the demand for early strength development.
The dosage is always based on the flow of concrete. This is done with the help of the concrete pump and a synchronised dosing system.
7. CHASSIS MOTORIZED
The concrete pump is moved to the desired spot by the motorised chassis. Because it must be capable of turning in comparatively tiny areas and function on uneven terrain, the chassis layout is essential.
8. THE REMOTE CONTROL AND CONTROL PANEL
Convenient to operate, the control panel verifies the state of the concrete that is already mixed within the hopper.
Depending on the requirements of the operation, operators can adjust the pumping speed. The computerised display shows when repairs or maintenance should be done.
On-site spraying can be controlled by operators via a remote control. All of the concrete components may be arranged from one handy location with the help of remote controllers, which can be either wireless or cable-based.
