A small concrete pump truck is a specialized concrete conveying equipment used in construction projects. It typically consists of a chassis, pumping system, conveying pipeline and control system. Small concrete pump trucks are lightweight equipment designed to meet the needs of rural low-rise buildings, tunnel piling, and underfloor heating construction, with core configurations focused on efficient conveying, flexible operation, and economy.
1. Power System: Dual Power for Diverse Scenarios
- Electric Motor Type
Power Range: 20kW-55kW, suitable for construction sites with ample power.
Advantages: Low operating costs, low noise, suitable for indoor or residential construction.
Typical Parameters: The 55kW motor can output 10MPa pressure, with a theoretical conveying capacity of 40m³/h.
- Diesel Engine Type
Power Range: 53kW-83kW, using low-fuel-consumption engines such as Weifang diesel engines.
Advantages: No external power supply required, suitable for field or power-scarce environments.
Typical Parameters: The 83kW diesel engine can output 10MPa pressure, with a theoretical conveying capacity of 40m³/h as well.
2. Hydraulic System: The Core Guarantee for Stable Delivery
- Dual-Pump, Two-Way Hydraulic System
Features: Independent control of the main oil circuit and the distribution valve oil circuit, reducing impact and improving reliability.
Protection Devices:
Safety Relief Valve: Prevents system overload.
Automatic Overpressure Cut-off: Automatically stops pumping when pressure is abnormal.
Suction Port Filter: Prevents impurities from entering the hydraulic circuit, extending component life.
- Reversing Technology
Non-Contact Automatic Reversing: Reversing is controlled by a pressure sensor, reducing mechanical wear.
Delay Stage Control: Optimizes reversing timing, ensuring smooth pumping.
3. Pumping System: The Key to Efficient Delivery
- Hopper and Conveying Cylinder
Hopper Capacity: Typically 0.3m³-0.5m³, suitable for small aggregate concrete.
Conveying Cylinder: Inner diameter 180mm-260mm, stroke 1200mm-2200mm, directly affecting the single pumping volume.
- Distribution Valve
S-shaped valve: Mainstream configuration, achieves concrete flow direction switching through rotation, with good sealing performance.
Skirt Valve: Used in some high-end models, providing a smooth flow channel and reducing concrete residue.
Pumping Parameters:
Theoretical Discharge: 30m³/h-90m³/h, meeting the needs of low-rise buildings.
Outlet Pressure: 8MPa-12MPa, capable of conveying concrete with aggregate size ≤30mm.
4. Boom and Outrigger System: Flexible Support Layout
- Boom Configuration:
Number of Sections: 3-5 sections, folding methods include roll-up and Z-fold.
Roll-up: Short retracted length, suitable for narrow spaces.
Z-fold: Low extension height (≤5m), suitable for tunnel or indoor construction.
Vertical Height: 20m-33m, covering 3-10 story buildings.
Turntable Rotation: 360° continuous rotation, wide concrete placement range.
- Outrigger Design:
H-type Outrigger: High stability, adaptable to uneven ground.
X-type Outrigger: Small retracted size, easy to transport.
Hydraulic Outriggers: Equipped with a level and automatic leveling function to ensure concrete pump truck stability.
5. Electrical and Control Systems: Intelligent Operation
- Control Methods
Manual Control: Emergency backup, operated via mechanical lever.
Remote Control: Wireless remote control distance up to 100m, more flexible operation.
PLC Intelligent Control: Equipped in some models, automatically adjusts pumping speed and pressure.
- Safety Devices
Emergency Stop Button: One-button stop all actions.
Tilting Warning: Sensors monitor outrigger stress, alarming when limits are exceeded.
Lubrication System: Automatically lubricates key components at set intervals to reduce wear.
6. Additional Configurations: Details Enhancing Practicality
- Cleaning Devices
High-Pressure Water Gun: Cleans the hopper and conveying pipe to prevent hardened concrete blockage.
Air Washing Device: Compressed air-assisted cleaning for higher efficiency.
- Noise Reduction Design
Soundproof Enclosure: Encloses the engine and hydraulic pump, reducing noise by 10dB-15dB.
Rubber Vibration Dampers: Vibration damping pads are installed between the outriggers and chassis to reduce vibration transmission.
- Convenience of Maintenance
Hangable side door: Facilitates inspection and maintenance of the hydraulic system and electrical components.
Modular design: The pumping unit can be quickly disassembled for easy transportation and maintenance.
Features of small concrete pump trucks include:
- Small size and high flexibility:
Compared to large concrete pump trucks, small concrete pump trucks are smaller in size, suitable for operation in confined construction sites, and can be moved flexibly.
- High efficiency:
Small concrete pump trucks can quickly transport concrete from the concrete mixer truck to the construction site, improving construction efficiency.
- Wide applicability:
Suitable for various construction occasions such as small buildings, residences, bridges, and tunnels, especially in densely populated urban areas.
- Simple operation:
Modern small concrete pump trucks are usually equipped with advanced control systems, making operation relatively simple and easy to learn.
- Economy:
Small concrete pump trucks are relatively economical, especially suitable for small construction companies or individual contractors.
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