News Details

 

In recent years, with the rapid development of the construction industry, concrete transportation and pouring equipment has received increasing attention. Among these, the delivery hose, especially the end-bend rubber hose, is a core component of concrete trucks, and its performance significantly impacts construction efficiency and quality. Its wear-resistant and pressure-resistant design allows this component to perform exceptionally well in high-intensity and complex environments. This article will provide a comprehensive analysis of the material characteristics, manufacturing process, technical advantages, and practical applications of the end-bend rubber hose of concrete truck delivery hoses, helping you better understand this crucial component.

 

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I. Functional Introduction of the End-Bend Rubber Hose of Concrete Truck Delivery Hose

 

As a vital component connecting the concrete pump to the construction site, the concrete truck delivery hose is responsible for accurately delivering concrete to the designated location. The end-bend rubber hose, located at the end of the hose, is typically designed with a specific curved shape to achieve functions such as flow guidance, pressure reduction, and wear resistance. This component withstands multiple turning pressures throughout the delivery system and needs to adapt to complex construction environments, including high and low temperatures, strong friction from cement slurry, and high-pressure impacts. Therefore, the wear resistance and pressure resistance of its material are particularly important.

 

II. Material Analysis of Wear-Resistant and Pressure-Resistant Rubber Hose

 

The core of a high-quality end-bend rubber hose lies in its material and layer structure design. The following are its main components and characteristics:

 

1. High-Strength Rubber Layer

 

The surface layer of the rubber hose is usually made of wear-resistant rubber, which must possess extremely high tensile strength and aging resistance. The main materials include natural rubber (NR) and synthetic rubber (such as nitrile rubber, NBR). Natural rubber has strong ductility, while nitrile rubber has stronger wear resistance, capable of resisting long-term erosion of the pipe wall by concrete particles.

 

2. Multi-Layer Composite Structure Design

 

Pressure resistance is usually achieved through a combination of composite material layers and steel wire braided layers. One or two layers of reinforcing fibers or steel wire mesh are added in the middle to support the pipe wall, ensuring that it does not burst or collapse during high-pressure transportation. This layer structure design effectively maintains its shape and ensures stability during long-term pressure transportation.

 

3. Special Inner Wall Coating

 

To improve its wear resistance, the inner wall of the rubber hose is usually covered with an anti-corrosion coating or a vulcanized wear-resistant layer, reducing the wear of concrete particles on the inner wall and thus extending its service life.

 

III. Manufacturing Process of End-Bend Rubber Hose

 

The quality of rubber hoses is inseparable from advanced production processes. The following are the main manufacturing steps:

 

1. Raw Material Screening and Mixing

 

High-quality rubber raw materials are screened and mixed with additives to ensure a balance between wear resistance and pressure resistance. The addition of anti-aging agents and reinforcing agents further improves the product's stability.

 

2. Multi-Layer Extrusion and Braiding Process

 

The manufacturing process uses a layered extrusion process, pressing and fusing the wear-resistant rubber layer and the steel wire braided layer layer by layer. High-temperature vulcanization technology ensures the stability and tightness between the layers.

 

3. Bending Forming Technology

 

For the end-bend section, a specific curvature design is used to adapt to the mechanical requirements of concrete flow. This structure can both reduce the impact force of cement particles at the bend and reduce internal pressure fluctuations.

 

4. Pressure Resistance Testing and Quality Inspection

 

Pressure resistance testing is an essential step in verifying the performance of the finished product, ensuring that the rubber hose can withstand pressures exceeding its rated value. Simultaneously, an abrasion resistance test lasting several hours simulates the flow environment of concrete, eliminating any potential quality issues.

 

IV. Technical Advantages of Wear-Resistant and Pressure-Resistant End-Bend Rubber Hose

 

1. Superior Abrasion Resistance

 

The inner wall of the end-bend rubber hose undergoes a special coating treatment, significantly reducing wear from concrete erosion. Combined with a multi-layer extrusion process, its overall abrasion resistance is improved by more than 30%.

 

2. High Pressure Bearing Capacity

 

The addition of a steel wire braided layer allows the rubber hose to stably withstand pressures up to several hundred bar without bursting due to sudden internal pressure fluctuations. This is particularly effective in complex construction environments.

 

3. Wide Applicable Temperature Range

 

The rubber hose's temperature resistance typically ranges from -25℃ to 120℃, maintaining stable performance in both cold northern construction sites and hot southern climates.

 

4. Extended Service Life

 

Its overall service life is approximately 1.5 times longer than ordinary conveying hoses, reducing the frequency of component replacement and thus lowering construction and maintenance costs.

 

V. Application Scenarios and Market Demand Analysis

 

1. High-Strength Construction Engineering

 

In high-speed railway, bridge construction, and high-rise building construction, this type of rubber hose exhibits high-strength conveying capacity, meeting the requirements of continuous high-pressure concrete conveying.

 

2. Water Conservancy and Geological Engineering

 

The rubber hose is not easily damaged in complex geological construction, making it suitable for use in high-pressure environments such as tunnel construction and foundation grouting.

 

3. Rapid Construction Sites

 

Its wear-resistant and pressure-resistant characteristics make the end-bend rubber hose suitable for construction sites with short construction periods and high demands. It reduces unnecessary component maintenance time during construction.

 

VI. External Factors Affecting Hose Performance

 

1. Construction Environment Abrasion Factors

 

If the construction environment contains a large amount of sharp substances, it may scratch the outer layer. Therefore, in harsh environments, protective sleeves should be used to protect the hose surface as much as possible.

 

2. Pressure Management and Operating Procedures

 

Incorrect operating methods, such as pressure overload or improper bend positioning, can damage the pipeline. Strictly follow the equipment operating instructions during use.

 

3. Regular Cleaning and Maintenance

 

After concrete delivery, promptly clean the inner wall of the pipeline with clean water or a specialized cleaning solution to prevent hardened concrete residue from causing blockages and affecting subsequent work.

 

VII. Future Development Trends and Technological Innovation

 

The design and performance of end-bend rubber hoses are constantly being optimized and improved. The following technological directions are particularly noteworthy:

 

1. Smart Material Applications

 

Future rubber materials may incorporate self-healing technology, capable of repairing micro-cracks in the pipe wall, further extending service life.

 

2. Sustainable Manufacturing

 

More and more manufacturers are focusing on environmental protection, applying bio-based materials to the research and development of rubber products to reduce the industry's dependence on non-renewable resources.

 

3. Lighter Design

 

Through experiments with layered structure weight reduction technology and high-strength composite materials, future hoses may be more than 20% lighter while maintaining their wear and pressure resistance.

 

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In summary, the rubber elbow at the end of the concrete truck delivery hose plays a crucial role in modern construction. Its wear-resistant and pressure-resistant properties significantly improve construction efficiency and make concrete delivery more stable and reliable in complex environments. In the future, with further technological breakthroughs, this product is bound to see even wider applications, while also achieving new progress in material innovation and sustainable development.