
Wear resistant rubber concrete delivery pipe pump truck special
In modern construction, concrete pumping technology is the key to improving construction efficiency, and the wear-resistant rubber concrete delivery pipe, as the core component of the pump truck system, directly affects the progress and quality of the project. This type of product achieves a balance between strong compressive strength and wear resistance through material innovation and structural optimization, becoming an indispensable conveying medium for large-scale projects such as high-rise buildings, bridges, and tunnels.
Material properties and wear resistance mechanism
The core advantage of wear-resistant rubber concrete conveying pipes comes from their composite material system. The inner lining layer adopts a blend formula of special nitrile rubber (NBR) and polyurethane (PU), and is reinforced with nano-sized silicon carbide particles to achieve a hardness of Shore A 85-90 degrees for the rubber matrix, while maintaining an elastic recovery rate of 30% -40%. This design ensures the smooth passage of concrete aggregates (particle size ≤ 40mm) and effectively resists the cutting wear of aggregate edges on the pipe wall. A comparative test conducted in a certain laboratory shows that under the same working conditions, the wear rate of this type of conveying pipe is only 1/8 of that of ordinary steel pipes, and its service life is extended to over 15000 cubic meters of concrete conveying capacity.
Super strong compressive structure design
In order to cope with the transient pressure up to 15-20MPa during pumping, the delivery pipe adopts a three-layer composite structure: the inner layer is a wear-resistant rubber layer, the middle layer is a high-strength steel wire wound skeleton, and the outer layer is an anti-aging rubber protective sleeve. The steel wire winding layer achieves ± 5% tension accuracy control through a CNC winding machine, ensuring that the pipe body undergoes coordinated deformation of each layer when subjected to high pressure. Taking the DN125 specification as an example, its burst pressure can reach over 60MPa, far exceeding the safety factor required by industry standards by three times. When pumping C60 high-strength concrete, this type of conveying pipe can maintain continuous operation for 500 hours without deformation, and the radial expansion rate of the pipe body is controlled within 0.3%.
Optimization of pump truck specific adaptability
In response to the special working conditions of the pump truck arm system, special improvements have been made to the interface design and weight control of the conveying pipe. Adopting a quick installation flange connection, the interface is ensured to have zero leakage under frequent bending conditions through dual protection of O-ring sealing and bolt pre tightening force. The actual test data of a pump truck manufacturer shows that the weight of a single section of DN125 conveying pipe is reduced by 15% compared to traditional steel pipes, which reduces the energy consumption of the boom system by 8% -10%. At the same time, the bending radius of the pipe body is optimized to 12 times the diameter of the pipe, which can maintain stable concrete flow rate even when the arm end rotates 360 °, avoiding the risk of pipe blockage.
Maintenance management and lifespan management
To extend the service life of the conveying pipe, it is recommended to establish a three-level maintenance system: daily inspection of interface sealing, weekly measurement of pipe wall thickness, and monthly pressure testing. When the remaining wall thickness of the pipe body is less than 60% of the original value, it should be replaced in a timely manner. Through scientific maintenance, the comprehensive use cost of conveying pipes can be reduced by 30%, while reducing downtime losses caused by pipe blockage.