Auto Mobile Truck Pumps for Wet-Mix. Shotcreting with 30m3/Hr Gunite Capability

At present, Wet Concrete shotcrete Pump Truck with Cordless remote control Smart Articulated Robotic Placing Booms is the New Design in 2018 for effective Tunnel Jobs.


 

A. Front and rear leg the span is large, work stability.
1.The front leg adopts horizontal telescopic cylinder + H-type legs, legs span is large, The rear leg adopts eight characters closed type leg, forcing ability is good, more stability, can effectively support the rear hopper pumping concrete cylinder loading impact.

B. Pumping system
1) Pumping hydraulic system adopts 55KW four-pole motor 130ml/r adjustable displacement main pump+ 45ml/r variable pump (Rexroth series)
2) The main valve adopts imported eight proportional valve (BARMAG ) from German,
The electric proportional valve has the fixed-variable switching function.

C.The boom adopts symmetrically arranged structure
The boom is symmetrically arranged with a symmetrical structure. The telescopic arm is connected to the base arm on the same axis. The telescopic arm is directly connected to the base arm through the pin. No connecting arm, no lateral force, no stress concentration, no happen Fatigue cracking, so the boom system is more stable and reliable.

D.Swinging arm
the boom can swing ± 45 °. can increase the flexibility of the jet mechanism to improve the single sprayable area, not only the spray surface is more smooth, beautiful, but also reduce the turntable rotation times, increase the stability of the boom

E.Boom section
Telescopic arm with four BS700 high-strength steel plate welded after welding,
weld joints have a lap bar, The rigidity of the boom increases so that the telescopic arm has a small vibration amplitude under the wet spraying operation, good stability, can improve the quality of sprayed surface

F.Reinforced rotary drive mechanism
1.rotary reducer adopts turbo-type gear reduction mechanism, big reduction ratio,  
strong self-locking ability, the big output torque, stable smooth operation, high reliability.
2.Adopts well-known brand rotary motor, large displacement, torque, good stability, in the precise control of the proportional valve, the rotation without jitter phenomenon.

G.Electrical control system
1.Electrical control system configuration
2.Remote control adopts domestic well-known brands, remote control distance, strong signal, no dropped calls, serial number phenomenon.The electrical components are all made by international famous brands such as Schneider, Siemens.

H.Quick - setting agent filling system
1. Accelerator pump driven by variable frequency motor, the use of Schneider inverter precision control quick-setting agent pump output flow, according to the current pumping of the amount of concrete automatically adjust the amount of added.
2.Accelerator pump with 2600L / h large displacement diaphragm pump, you can add 1000 l of the box in 20 minutes, greatly saving the preparation time.
3.Accelerator pipeline adopts a closed large diameter pipe, even in the winter can also smooth delivery accelerator.





Both of them are commonly used for pouring such thin-walled structures as tunnel lining, walls and ceilings, as well as the covering layer of steel structure.

Dry spraying machine mixes cement, sand and gravel in a dry and evenly state, a method to compress the air to deliver materials to the nozzle where they are mixed with pressure water for pouring; it must be operated by skilled personnel, and the particle size shall not be too large, however, as large amounts of cement are required and the jet velocity is large, which lead to severe dust pollution and rebound, its usage is thereby restricted.

Wet spraying machine delivers well mixed concrete to the nozzle through conveying and pumping, and compressed air is added at the outlet of delivery pump, which makes materials and air fully integrate with one another in the pipe, so that perfused materials become more even. In addition, accelerator is sprinkled on the nozzle for making materials solidify rapidly and reducing the rebound rate. Besides, its working efficiency is higher than dry spraying machine as the mixture of materials can be easily controlled.

Wet spraying machine is widely used for concrete spraying operation in places such as mine, tunnel, culvert, railway, hydro-power project, underground engineering and revetment.

Main Characteristics of Hydraulic Pump-type Wet Spraying Machine
The system is more reliable and delivery capacity is stable in adopting hydraulic pumping.
It has large volume of delivery, long distance of delivery and high efficiency of construction.
Sprayed concrete is of high performance and strength, as well as being dense and homogeneous.
,PLC.
The main oil pump adopts variable displacement piston pump of constant power; and the delivery amount, which can be freely adjusted according to needs, is controlled by PLC.
S pipe surfacing electrode of high strength, wear plate and cutting ring are inlaid with hard alloy of high strength, which not only improves the wear resistance, but increases the service life of parts.
It is equipped with multi-point electric lubricating pump. And together with automatic and effective control of grease's filling amount and time, contributing to the fact that the service life of wear-out parts are effectively increased
Air cooling avoids damage caused by water cooling in winter.
Accelerator is added and controlled by metering pump of domestically famous brand, achieving accurate measurement and realizing stepless speed regulation.
Harm on the health of operator is reduced by lowering dust concentration beside the machine and of the nozzle.
Humanized design of product makes operation and maintenance become easier, with reliability effectively guaranteed as well.
Configuration of Hydraulic Pumping Wet Spraying Machine:.
Power System: it adopts motor and diesel engine of domestically famous brand.
Main Oil Pump: it adopts variable plunger pump, which guarantees the stable and reliable operation of system, while its overpressure relief function realizes the effective protection of main pump and motor.
Lubrication System: it adopts separate lubrication of five points, and "point-to-point" lubrication guarantees that critical parts won't be worn out, thus increasing their service life.
Accelerator Metering Pump: reciprocating piston diaphragm pump is of high temperature resistance, erosion resistance and abrasion resistance, with high accuracy of measurement, and its speed can be regulated steplessly.
Characters of electronically controlled reversing system: low pumping pressure and high reversing speed, which reduce reversal impact and operator's labor intensity; two separate hydraulic circuits make the oil supply of system more stable; operation becomes simple and reliable through accurate control of PLC, which increases reversal speed of swing cylinder while reducing the reversal impact, at the same time, instantaneous action of large cylinder's reverse is accelerated, making concrete cylinder become substantial, increasing the continuity of materials supply and realizing even discharge.

Economic mini 8 cubic meter per hour wet concrete shotcrete pump
 

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