28m Boom Pump Truck for Sale

Posted On: 13/02/2025 | Posted by: Haomei Concrete Pumps

The 28 meter concrete pump has many advantages in construction. It is neither too long to cause inconvenience in operation and poor site adaptability, nor too short to meet the concrete delivery needs of a certain height and distance.

Taking the common residential community construction as an example, the height of multi-story buildings is generally within 20 meters. The 28-meter boom pump can easily cover the concrete pouring operations of these floors without frequently moving the pump truck, which greatly improves the construction efficiency. In some small commercial building construction, such as the construction of 3-5-story shopping malls, the building height and plane layout allow the 28-meter boom to be deployed in a suitable position, achieving accurate material distribution in each construction area and reducing the dead corners of concrete delivery. The telescopic method of the boom mostly adopts a Z-type or folding structure.

The Z-type boom is relatively simple and smooth in the process of extension and folding. When the boom is unfolded, each section of the boom extends in turn, like unfolding a huge folding fan, which can quickly cover a large operating range; and when folded, it can be compactly stored together, occupying very little space. The advantage of this structure is that it can operate flexibly in a limited space. For example, in a narrow construction site in the city, there may be other buildings, obstacles or road access restrictions around.

The Z-type boom can complete the expansion and contraction actions in a smaller site to ensure the smooth progress of the construction. At the same time, the Z-type boom has a wider range of material distribution. Through the combination of different angles of the boom, a larger range of material distribution in the horizontal and vertical directions can be achieved to meet the needs of different construction sites.

The folding boom has stronger adaptability and flexibility. It can fold the boom into different shapes and angles according to the actual situation of the construction site to avoid obstacles or adapt to special construction layouts. For example, in the construction of some complex building structures, such as the special-shaped roof of the gymnasium and the special piers of the bridge, the folding boom can deliver concrete to difficult-to-reach locations through clever folding and extension, which provides great convenience for construction. Moreover, the folding boom is more convenient during transportation, which can effectively reduce transportation costs and difficulties.

Stable chassis and outriggers

As the basic support of the 28-meter boom pump, the chassis plays a key role in the stability of the pump truck. The high-performance automobile chassis has good rigidity and load-bearing capacity. Taking a well-known brand's special chassis as an example, its frame is made of high-strength steel and is optimized to withstand various stresses and loads generated by the pump truck during driving and operation.

At the same time, the suspension system of the chassis has been specially adjusted to ensure the comfort of the pump truck during driving and provide stable support during operation. In some construction sites with poor road conditions, such as muddy construction roads or rugged mountain construction sites, the suspension system of the chassis can effectively buffer road bumps, ensure the stability of the pump truck during movement, and avoid the shaking of the boom due to bumps, which affects the delivery accuracy of concrete.

The outrigger design is another important factor in ensuring the stability of the pump truck. The outriggers of the 28-meter boom pump are usually made of high-strength steel with sufficient strength and rigidity. There are various ways to unfold the outriggers, the most common of which are horizontal extension and vertical extension, or a combination of the two. In terms of horizontal extension, the outriggers can extend outward on both sides of the pump truck or in the front and rear directions to increase the contact area between the pump truck and the ground, thereby improving the pump truck's anti-overturning ability.

For example, when pouring concrete for a high-rise building, the outriggers on one side of the pump truck may need to extend a longer distance to balance the center of gravity offset after the boom is extended to ensure the stability of the pump truck during operation. The vertically extended outriggers can be adjusted according to the flatness of the ground to keep the pump truck horizontal.

In some uneven construction sites, such as backfill areas or sloped ground, the vertically extended outriggers can adjust the height to keep the chassis of the pump truck horizontal to avoid unstable boom operation due to chassis tilt, which in turn affects the pumping quality of concrete. The adaptability of the chassis and outriggers is also reflected under different working conditions.

In construction sites with soft soil foundations, the outriggers are usually equipped with larger pads to disperse the pressure of the outriggers on the ground and prevent the outriggers from sinking into the ground. On hard ground, the outriggers can be directly supported without pads. In some narrow construction sites, the deployment mode and range of the outriggers may need to be adjusted according to site conditions. For example, a front telescopic and rear swinging outrigger structure is used.

This structure combines the advantages of telescopic outriggers and swinging outriggers. When constructing in a narrow construction site, the telescopic outriggers at the front can be stretched in a limited space to provide sufficient support, while the swinging outriggers at the rear can swing within a larger angle range to adapt to different site layouts.

Efficient pumping system

The core parameters of the pumping system determine its ability and efficiency to transport concrete. Pumping pressure is an important parameter. Generally, the pumping pressure of a 28-meter boom pump is around 8-12MPa. A higher pumping pressure can ensure that the concrete overcomes various resistances in the pipeline and is smoothly transported to the construction site. For example, when performing long-distance horizontal pumping or vertical pumping on higher floors, the pumping pressure needs to be large enough to transport the concrete to the designated location.

When the pumping distance is more than 100 meters or the pumping height reaches more than 20 meters, a higher pumping pressure can ensure that the concrete is not blocked in the pipeline and maintain continuous and stable transportation. In the construction of some large commercial complexes, concrete needs to be transported to different floors and areas through longer pipes. At this time, the pumping pressure of the 28-meter boom pump can meet the long-distance, high-drop pumping needs.

Displacement is also one of the key parameters of the pumping system. The common 28-meter boom pump has a theoretical displacement of about 80-120m³/h. A larger displacement means that more concrete can be delivered per unit time, improving construction efficiency. In some large-scale construction projects, such as the construction of large residential areas, a large amount of concrete pouring work needs to be completed in a short time.

A larger displacement pumping system can enable the boom pump truck for sale to deliver concrete to various construction sites in a shorter time, speeding up the construction progress. At the same time, the displacement of the pumping system can also be adjusted according to the actual construction needs. In some construction sites that do not require high concrete delivery, such as pouring some small components or repairing concrete, the displacement can be reduced to achieve accurate concrete delivery and avoid waste.

In order to ensure efficient and stable delivery of concrete, the pumping system also adopts a series of advanced technologies and designs. For example, the pumping mechanism adopts advanced hydraulic drive technology, and realizes precise control of the pumping process by precisely controlling the flow and pressure of hydraulic oil.

The main oil pump in the hydraulic system can provide stable power output to ensure the continuity and stability of the pumping process. At the same time, the pumping system is also equipped with an efficient mixing mechanism, which can continuously mix the concrete during the concrete pumping process to prevent the concrete from segregating and ensure the uniform and stable quality of the concrete.

Inside the hopper, the design and layout of the mixing blades are optimized to fully mix the concrete, so that the cement, aggregate, water and other components in the concrete are evenly mixed to avoid precipitation, stratification and other problems, thereby ensuring the fluidity and pumpability of the concrete during the pumping process.

As a key component of the pumping system, the design and performance of the S valve assembly also directly affect the delivery effect of concrete. The S valve realizes the suction and discharge of concrete through clever valve port switching.

When sucking concrete, the valve port of the S valve is opened, allowing the concrete to enter the delivery cylinder smoothly; when discharging concrete, the valve port of the S valve is closed, and the concrete in the delivery cylinder is pressurized and delivered to the pipeline. The switching action of the S valve is fast and accurate, which can ensure the continuity of the pumping process, reduce the pressure fluctuation during the pumping process, and improve the delivery efficiency and stability of concrete. In addition, the sealing performance of the S valve is also very important. Good sealing performance can prevent concrete leakage and ensure the normal operation of the pumping system.

Original source: https://www.concrete-pump-cn.com/a/28m-boom-pump-truck-for-sale.html

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