fuyangby@126.com
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fuyangby@126.com
86 15188770013
The pipeline layout directly affects the head, flow rate, and cavitation performance of the slurry pump, thereby determining the pump type selection and operational stability.
Pipeline layout is an important part of slurry pump system design, including pipeline length, number of bends, elevation changes, pipe diameter size, and valve configuration. These factors collectively determine the resistance loss and NPSH of the system, thereby affecting the selection and actual operating performance of the pump. If the pipeline design is unreasonable, even if the pump itself has excellent performance, it may lead to efficiency decline, cavitation, vibration, and even shutdown accidents.
Analysis of Impact Dimensions
Head demand
The vertical conveying height, horizontal distance, and local resistance (such as bends and valves) of the pipeline will increase the total head demand.
When designing, it is necessary to calculate the pipe loss and reserve a margin of 5% -10% in the selection of pump head to cope with wear and fluctuations.
If the calculated head is too large or the actual pipe diameter is too small, it will lead to an increase in head loss, forcing the pump to increase speed, which may cause cavitation or overload operation.
Traffic matching
A too small pipe diameter can cause excessive flow velocity, exacerbate pipe wall wear, and increase energy consumption; Excessive pipe diameter may lead to insufficient flow velocity, resulting in slurry deposition or pipe blockage.
The actual flow rate is determined by the intersection point of the pipeline characteristic curve and the pump performance curve. Unreasonable pipelines can cause the working point to deviate from the design value, resulting in flow fluctuations or vacuum phenomena.
Cavitation risk
The suction pipeline should be as short and curved as possible, and avoid the formation of air pockets to prevent cavitation.
Eccentric reducers should be used on the suction side to prevent airbag formation; If necessary, an exhaust valve should be installed.
The suction pipe diameter is usually equal to or greater than the pump inlet diameter to reduce flow rate and increase effective cavitation head (NPSHa).
Structural Load and Maintenance
The weight and thermal stress of the pipeline shall not exceed the allowable external load of the pump port, and pipe supports shall be installed on the suction and discharge pipes.
The valve position should be convenient for operation and maintenance. It is recommended to install a gate valve at the suction inlet for easy disassembly and maintenance of the pump.
suggestion
Reasonable matching of pipelines and pumps is the key to ensuring efficient and stable operation of the system.
When selecting, hydraulic calculations must be carried out in conjunction with specific pipeline layouts to verify head, flow rate, and cavitation allowance. Priority should be given to selecting pump types that support speed regulation to adapt to fluctuations in operating conditions. Professional selection software (such as CAD based optimization systems) can be used to improve matching accuracy. In addition, it is recommended to use standardized pump models for easy replacement and maintenance of accessories in the later stage.
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