Concrete trailer pump
Concrete trailer pump is a special engineering machinery equipment that uses pressure (usually hydraulic drive) to continuously transport premixed concrete to the pouring site through pipelines.
The core function of concrete pump trailer: to solve the problem of efficient and continuous vertical and horizontal transportation of concrete.
Types of concrete trailer pumps
4 common types of concrete trailer pumps
1. Trailer concrete pumps:
Concrete pumps on trailers are also called trailer pumps or fixed pumps. Trailer concrete pumps have no chassis and need to be towed to the site by trucks. There are electric concrete trailer pumps or diesel concrete trailer pumps, and the delivery pipelines are manually laid and disassembled.
Advantages and Disadvantages of Trailer Concrete Pumps
| Advantages | relatively low price, high pumping pressure, and high delivery distance/height potential. |
| Disadvantages | poor maneuverability, time-consuming and labor-intensive pipe laying, and low flexibility. |
What are trailer concrete pumps used for?
Suitable for fixed and long-term work points such as large foundations, dams, and large building bodies.
2. Truck-mounted concrete pumps
Truck-mounted concrete pumps are also called pump trucks and truck-mounted boom pump trucks. The pumping system (including the placing boom) is integrated into the truck chassis.
Truck-mounted concrete pumps have their own power (chassis engine or independent engine driving hydraulic system). Equipped with a foldable, slewing, and extendable boom system (usually 3-7 sections of boom), with a delivery hose (elephant trunk) at the end.
Advantages and disadvantages of vehicle-mounted concrete pumps
| Advantages | Strong mobility (with its own power and walking mechanism), fast arrival at the site, no (or little) manual pipe laying, flexible and efficient laying, easy operation. |
| Disadvantages | Expensive, slightly lower pumping pressure than drag pump, limited by boom length (height and horizontal distance), relatively high site requirements (space required for expansion). |
What are concrete pump trucks used for?
Concrete pump trucks are the most widely used, suitable for urban construction (housing construction, municipal administration), small and medium-sized projects and other occasions that require fast and flexible laying.
3. Gate valve pumps
Gate valve pumps are relatively rare, using gate valves to control the suction and discharge of concrete cylinders. Gate valve concrete pumps have a relatively simple structure and relatively loose requirements for aggregates (concrete containing a small amount of large aggregates can be pumped). The pumping efficiency is usually lower than that of S valve pumps.
Suitable for occasions where concrete requirements are not too strict or the aggregates are slightly larger.
4. Mixer pump integrated machine
Mixer pump integrated machine, with its own mixing drum, can mix concrete on site and pump it, suitable for small projects or remote areas.
The concrete demand is less than 200 cubic meters per day, and the operation is simple, requiring only 3-5 people.
Trailer concrete pump core working principle
How does the concrete pump trailer work? Take the mainstream S-valve trailer pump/pump truck as an example
1. Power source:
diesel engine or electric motor drives the hydraulic pump to generate high-pressure hydraulic oil.
2. Hydraulic drive:
high-pressure hydraulic oil drives the main cylinder piston to reciprocate.
3. Concrete cylinder push:
the main cylinder piston drives the concrete cylinder piston to reciprocate through the connecting rod.
Suction stroke: one concrete cylinder piston retreats, and with the assistance of the hopper mixing blade, the concrete in the hopper is sucked into the concrete cylinder.
Push stroke: at the same time, the other concrete cylinder piston moves forward to push the concrete in the cylinder out.
4. S valve switching:
Located between the hopper and the conveying pipe, it looks like the letter “S”.
When the main cylinder is reversing, the S valve is driven by the swing cylinder to swing left and right.
The swing of the S valve makes its outlet alternately align with the two concrete cylinders:When one cylinder is sucking, the S valve port is aligned with the other cylinder to prepare for pushing.
When a cylinder is pushed, the S valve port connects the cylinder to the delivery pipeline, and the concrete is pressed into the pipeline.
This alternating switching ensures the continuous and pulsating output of concrete.
5. Pipeline transportation:
Under the action of pressure, the pushed concrete is transported along the laid pipeline (composed of straight pipes, curved pipes, tapered pipes, etc.) to the pouring point (drag pump) or the hose outlet at the top of the boom (pump truck).
6. Lubrication and sealing:
The water tank system provides pressurized water to lubricate the concrete cylinder piston, the contact surface between the S valve and the eye plate, and the inner wall of the delivery pipeline, reduce wear and resistance, and help seal.
Trailer concrete pump key components
| 1 | Chassis | Carrying the entire equipment and providing walking ability (truck chassis). |
| 2 | Pumping system |
|
| 3 | Hydraulic system |
|
| 4 | Boom system (unique to pump trucks) |
|
| 5 | Outrigger system |
|
| 6 | Electronic control system |
|
What should I pay attention to when using a concrete pump trailer?
1. Concrete requirements:
Workability: The slump should be moderate (usually the pumping slump is in the range of 120mm – 180mm, depending on the pumping height distance). If it is too large, it is easy to segregate, and if it is too small, it is easy to block the pipe due to large resistance.
Aggregate: Good gradation, the maximum particle size does not exceed 1/3 of the pipe diameter (usually ≤40mm), and the needle-like content is small.
Mix ratio: It must contain enough fine powder (cement + admixture) and mortar to wrap the aggregate to ensure lubricity.
2. Pipeline layout (drag pump):
Principle: short route, few elbows, good joint sealing, and firm fixation.
Pipe diameter matching: 125mm or 150mm pipe diameter is commonly used, and the outlet may need to be reduced in diameter.
Elbow angle: Large angle elbows (such as 90°, 135°) are preferred to reduce resistance.
3. Pumping operation:
Check before starting: hydraulic oil level, lubricating grease, cooling water, pipeline sealing, leg stability, safety devices, etc.
Lubrication: Be sure to apply lubricating slurry (cement mortar or special lubricant) before pumping to lubricate the pipeline.
Pumping speed: Slow at the beginning, uniform after normal, slow at the end.
Pause treatment: If the pause time is long (such as >30 minutes), it is necessary to perform forward and reverse pump operations every few minutes to prevent pipe blockage.
Pipe blockage treatment: Immediately reverse the pump several times and try to clear it. If it does not work, it is necessary to dismantle the pipeline before the blockage point is cleaned. Forced high-pressure pumping is strictly prohibited!
Cleaning: After pumping, the hopper, S valve, delivery cylinder and pipeline must be thoroughly cleaned to prevent concrete solidification from damaging the equipment.
4. Safety:
Leg safety: Make sure the legs are fully unfolded and supported on a solid and flat ground before operation, and use pads.
Boom safety: Pay attention to keep a safe distance from high-voltage lines and buildings; operate carefully in windy weather; it is strictly forbidden to stand under the end hose.
Pipeline safety: Pipeline connections are firm, and joints are at risk of breaking open under high pressure; be sure to release pressure before disassembling the pipeline.
Hopper safety: Mixing blades are dangerous, so shut down and lock the machine when cleaning.
Personnel training: Operators must receive professional training and hold a certificate before taking up their posts.
How to choose a concrete pump?
The application and selection of concrete pumps need to consider various factors, and buy the most suitable solution in turn.
The following are 5 selection factors to help you better choose your concrete pump.
1. Project requirements:
| Building height/pouring depth. | Horizontal conveying distance. |
| Concrete pouring volume and speed requirements. | Construction site size, access road conditions, space restrictions. |
2. Concrete performance:
grade, slump, aggregate particle size, etc.
3. Equipment performance:
pumping pressure, delivery volume, boom length (pump truck), reliability, brand service.
4. Economic efficiency:
equipment purchase/rental cost, fuel/power consumption, labor cost (pipe laying), and benefits brought by efficiency improvement.
5. Site conditions:
power supply, site flatness, surrounding environment (high-voltage lines, buildings).
Maintenance of concrete pump
Daily maintenance: check oil/water/grease, clean equipment, check fasteners, and check whether there is any abnormal noise during operation.
Regular maintenance: replace hydraulic oil, filter element, and grease according to the manufacturer’s requirements; check wear parts (glass plate, cutting ring, piston, S valve, delivery cylinder, mixing blade/liner, elbow, etc.) and replace them in time; system pressure detection and adjustment.
Key wear parts: S valve, eye plate, cutting ring, concrete piston, delivery cylinder, elbow, mixing blade and liner are vulnerable parts, which need to be paid attention to and replaced regularly.
SMAT concrete trailer pump for sale
As a professional trailer pump concrete, SMAT provides complete installation and after-sales service.
1. Depending on the model, we provide customers with free pipes of different lengths
2. We provide customers with installation and debugging videos, and local engineers provide installation guidance services
3. Local engineers are responsible for after-sales, and the quality assurance is one year.
4. 7*24 hours online reply
