What is a concrete pump?

Concrete pump, also known as concrete pump, consists of a pump body and a delivery pipe. Concrete pump is a machine that uses pressure to continuously transport concrete along the pipeline. It is mainly used in building construction, bridge and tunnel construction. It is mainly divided into gate valve concrete pump and S valve concrete pump. Another type is to install the pump body on the chassis of the car and equip it with a retractable or flexural distribution rod to form a pump truck.

HBT30 concrete pump

HBT30 concrete pump is also called S valve concrete pump hbt30. The 30 pump is a hydraulic piston drag pump with a theoretical delivery capacity of 30 cubic meters per hour as the core. It realizes continuous concrete delivery through alternating work of two cylinders:

Suction and push: The hydraulically driven double cylinders alternately suck concrete and push it to the pipeline. The S valve intelligently switches the direction to ensure the continuity of the discharge.
Pressure matching: The hydraulic system dynamically adjusts the pressure (8-12MPa) to adapt to different working conditions and balance the delivery volume and distance.
Efficient circulation: Optimize cylinder stroke and switching frequency, accurately match the theoretical production capacity of 30m³/h, and reduce idling losses.

HBT30 concrete pump performance parameters

The motor power of a concrete pump is a prerequisite for determining the outlet pressure and delivery volume. Under the condition of a certain motor power, the increase in pressure will inevitably reduce the delivery volume; on the contrary, reducing the outlet pressure will increase the delivery volume.

The product of the actual outlet pressure of the HBT30 concrete pump and the actual delivery volume per hour, the larger the value, the greater the capacity index, the greater the motor power, thus achieving the purpose of large displacement and high head.

Note: When the minimum diameter of the delivery pipe is 100mm, the maximum particle size of the coarse aggregate cannot exceed 25mm. When the minimum diameter is 125mm, the maximum particle size cannot exceed 40mm.
When piping vertically upward, the length of the horizontal pipe on the ground should not be less than one-fourth of the length of the vertical pipe, and should not be less than 15m, or comply with the provisions in the product manual.
A stop valve should be installed at the root of the delivery pipe 3 to 6m from the Y-shaped pipe outlet of the concrete pump to prevent the backflow of concrete mixture.

HBT30 concrete pump performance characteristics

1. Adopt triple pump open system, hydraulic circuits do not interfere with each other, and the system runs smoothly.

2. It has reverse pump function, which is conducive to timely elimination of pipe blockage faults, and can be stopped for a short time to wait for materials.

3. It adopts advanced S-tube distribution valve, which can automatically compensate for wear gap and has good sealing performance.

4. It adopts wear-resistant alloy eyeglass plate and floating cutting ring, which has a long service life.

5. The long-stroke cylinder prolongs the service life of the cylinder and piston.

6. The optimized hopper is easy to clean and has better suction performance.

7. The automatic centralized lubrication system ensures effective lubrication during machine operation.

8. It has remote control function, which makes operation safer and more convenient.

9. All parts are in accordance with national standards and have good interchangeability.

How to use concrete pump?

HBT30 concrete pump user guide: 10 steps to teach you!

1. The ground supporting the hbt30 concrete pump should be flat and solid; the whole machine should be placed horizontally and should not tilt during operation. The legs should be able to stably support the whole machine and be reliably locked or fixed.

The location of the pump should be convenient for the concrete mixer truck to enter and exit and feed into the hopper, and should also be conducive to pumping pipe laying and reducing pumping pressure loss. At the same time, it is required to be close to the pouring site and convenient for power and water supply.

2. Piping should be carried out according to the characteristics of the construction site and the concrete pouring plan. When designing the piping, it is necessary to check whether the horizontal conversion distance of the pipeline is compatible with the pumping distance of the HBT30 concrete pump.

When piping, the length of the pipeline should be shortened as much as possible, and fewer elbows and hoses should be used. The laying of the delivery pipe should be convenient for pipeline cleaning, troubleshooting, and disassembly and maintenance.

When new pipes and old pipes are mixed, the new pipes should be arranged at places with higher pumping pressure. During the piping process, a simple piping diagram should be drawn, and the specifications and quantities of various pipe fittings, pipe clamps, elbows and hoses should be listed, and a list should be provided.

3. When piping is required vertically upward, as the height increases, that is, the potential energy increases, the concrete tends to flow back. Therefore, a certain length of horizontal pipe should be laid between the concrete pump and the vertical piping to ensure sufficient resistance to concrete backflow.

When pumping high-rise building concrete, vertical piping is required. At this time, the length of the ground horizontal pipe should not be less than 1/4 of the length of the vertical pipe. If the water pipe of the required length cannot be placed due to site limitations, an elbow or hose can be used instead.

4. During the concrete pumping process, as the pumping pressure increases, the pumping impact force will force the pipe to move back and forth, which not only consumes the pumping pressure, but also puts the connection between the pump pipe in a state of impact and intermittent tension, which can cause premature damage to the pipe clamp and rubber ring and cement slurry overflow. Therefore, the pump must be fixed.

5. After the concrete pump is connected to the delivery pipe, a comprehensive inspection should be carried out according to the provisions of the concrete pump instruction manual. Only when it meets the requirements can it be started for idling. After idling for 10 minutes, check whether each mechanism or system is working properly.

6. When constructing in hot seasons, it is advisable to cover the concrete delivery pipe with wet straw bags, wet cover cloths, etc. to avoid direct sunlight, which can prevent the concrete from slumping and causing pipe blockage due to excessive loss of slump.

7. When concrete pumping construction is carried out in winter in cold areas, appropriate insulation measures should be taken. It is advisable to wrap the concrete delivery pipe with insulation materials to prevent the concrete in the pipe from freezing.

8. When installing and designing pipelines, avoid 90. and S-shaped bends as much as possible. Try not to use pump pipes with obvious pits to reduce the resistance of pumping concrete and prevent blockage. The pump pipe should be checked frequently. If the pump pipe is worn to a large extent in one direction, the pipe should be reversed and used in time. If the pump pipe is too thin, a new pipe should be replaced in time to prevent the pump pipe from bursting during operation or blocking due to a long replacement time.

9. In order to ensure the continuity of the pumping concrete operation and the quality of concrete pouring, the interval time during the operation should not be too long to prevent blockage. If the interval time is long for some reason, the pump should be started once every 20 minutes or reverse and forward pumps should be turned several times. If necessary, the circulating pump should be used to prevent blockage.

10. The pumped concrete should meet the pumpability requirements. If necessary, the mix ratio of the pumped concrete should be determined by testing the pump. First, the ratio of the maximum particle size of the coarse aggregate to the diameter of the conveying pipe should be determined. When the pumping height is below 50m, it should not be greater than 1:3 for crushed stone and should not be greater than 1:2.5 for pebbles; when the pumping height is between 50 and 100m, it should be in the range of 1:3 to 1:4; when the pumping height is above 100m, it should be between 1:4 and 1:5.

How to maintain a concrete pump?

1. After the concrete is pumped, the delivery pipeline should be cleaned immediately, the pump should be cleaned, and inspection and maintenance and other finishing work should be carried out.

2. Cleaning steps for delivery pipelines:

a. The pipeline should be equipped with a stop valve, and the stop plate should be inserted to prevent the concrete in the vertical or upward inclined pipe from flowing back.

b. Take out some concrete from the mouth of the first straight pipe, connect the air washing joint, and insert a water-soaked sponge ball into the joint in advance, and install the inlet and outlet valves and compressed air hoses on the joint.

c. Install a safety cover at the end of the pipeline to prevent concrete spraying and injuring people.

d. Slowly open the compressed air inlet valve to allow the compressed air to press out the sponge ball and concrete. If the pipeline is equipped with a stop valve, it should be opened in the open position first, and then the air valve should be opened.

e. When the concrete in the pipeline has been completely emptied and the sponge ball has been ejected immediately, the air washing is completed. At this time, the compressed air inlet valve should be closed, and then various pipe fittings should be disassembled.

Notes for air washing: – The compressed air pressure should not be higher than 0.7MPa.

The air valve should not be opened suddenly, but should be opened-closed-opened and carefully observed. It can only be opened when the concrete can flow out smoothly.

If it is found that the air washing does not work, the air inlet valve should be closed first, and then the exhaust valve should be slowly opened to release air, and then try to wash in sections.

When washing in sections, the section of the pipe near the discharge end should be blown off first, and then the blown-empty pipe should be connected to the section that has not been blown, and the remaining section should be blown. During air washing, personnel should not approach the discharge pipe mouth, sharp turns of the pipe (if it is a 90° bend) and compressed air pipe joints.

What are the application scenarios of HBT30 concrete pump?

Medium-sized construction projects: residential buildings (15-25 floors), commercial complexes, etc., which require stable continuous pouring of 30m³/h.

Municipal engineering: medium-distance (within 500 meters) concrete transportation such as integrated pipe corridors and subway platforms.

Industrial plants: large-scale uniform paving operations such as large warehouse floors and equipment foundations.

Special working conditions: areas with unstable electricity (diesel power);

Narrow sites (compact body + wheeled chassis for fast transfer).