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How does the wet spray machine's pumping system accommodate aggregates of different particle sizes?
Release time:
2025-10-02
Source:
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Summary:
I. Main Types and Characteristics of Wet Spraying Machine Pumping Systems
Currently, wet spray machines primarily use the following two pumping systems:
1. Plunger pump: Plunger pumps offer advantages such as high pressure, large flow rate, and long-distance material delivery; however, they have strict requirements for aggregate particle size and gradation, making them prone to pipe blockages.
2. Screw Pump: The screw pump offers advantages such as smooth operation, minimal pulsation, and strong adaptability to aggregate particle sizes. However, it has relatively low pressure and flow rate, limiting its conveying distance.
II. Key Technologies Enabling the Pumping System to Handle Aggregates of Different Particle Sizes
To accommodate aggregates of different particle sizes, the wet-mix shotcrete pump system incorporates the following key technologies:
1. Adjustable pumping parameters: By adjusting parameters such as pumping pressure and flow rate, the system can accommodate the delivery needs of aggregates with different particle sizes. For instance, for larger-sized aggregates, the pumping pressure can be appropriately increased to ensure smooth passage through the pipeline.
2. Optimize the pumping mechanism design:
Piston pump: By adopting measures such as using a large-diameter piston and optimizing the valve assembly structure, the pump's adaptability to aggregate particle size can be enhanced, reducing pipe-blocking issues.
Screw pump: By adopting features such as a variable-pitch screw and optimizing the sleeve material, the pump's delivery efficiency and wear resistance can be enhanced, making it suitable for handling aggregates with a wider range of particle sizes.
3. Adding Admixtures: Incorporating appropriate amounts of water reducers, thickeners, and other admixtures into wet-mix concrete can enhance its workability and pumping performance, while also reducing aggregate segregation and pipe blockage.
4. Pipeline optimization design: Adopting appropriate pipe diameters, reducing the number of bends, and optimizing pipeline layout—among other measures—can lower pipeline resistance, enhance pumping efficiency, and minimize the risk of blockages.
III. Specific Measures for Adapting to Aggregates of Different Particle Sizes
In addition to adopting the key technologies mentioned above, the following specific measures can also be implemented to enhance the pumping system's adaptability to aggregates of varying particle sizes:
1. Strictly control aggregate gradation: Based on the performance characteristics of the pumping system, select an appropriate aggregate gradation and avoid using aggregates with excessively large particle sizes or poor gradation.
2. Ready-mixed concrete: Using ready-mixed concrete ensures the uniformity and stability of the concrete, enhancing its pumping performance.
3. Regular Maintenance and Servicing: Routinely inspect each component of the pumping system for signs of wear, and promptly replace any severely worn parts to ensure the system remains in optimal condition.
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