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Advantage of hose pump

2017-05-24 16:24:07

Hose pumps began to be used in the industrial sector decades ago. With the development of technology, from now to from the mining industry to the food processing industry, from the ceramic industry to the chemical industry, from the pharmaceutical to the water treatment, there are hose pump applications. What is the advantage of the hose pump?

Compared with other pumps, the unique advantages of industrial hose pumps:

Non-sealed structure, without any leakage and pollution; the use of advanced rolling technology, pressure roller does not require any lubrication; self-priming ability and self-cleaning ability, positive and negative suction; simple hose assembly, installation and maintenance simple , The maintenance cost is low, the operation is simple; the flow can be linearly adjusted, and there is a certain measurement function; the viscosity of the impurity of the liquid transport does not produce any clogging; pump long life, high head and pump pressure.

This first analyzes the weaknesses of other pumps:

Pumps are divided into two types of vane pumps and volumetric pumps.

Vane pump to centrifugal pump as the representative of its simple structure, low prices, in the pump market accounted for overwhelming advantage, accounting for about 80 percent of the pump market, suitable for transport thin, low viscosity, clean, Non-abrasive media.

The volumetric pump is produced by the change in the volume of the pump chamber. It is produced and developed for special working conditions. It is intended to solve the problem of sticky, shear sensitive, gas-solid mixed, strong abrasive Media delivery or metering problems.

In the field of positive displacement pump reciprocating pump and rotor pump two. Diaphragm pump is the most commonly used reciprocating pump; screw pump is the most commonly used rotor pump. Other volumetric pumps also include gear pumps, plunger pumps, vane pumps, flexible impeller pumps, cam pumps, peristaltic pumps. Hose pumps are part of the rotor type peristaltic pump.

In addition to the various pumps, the other pumps have a common weakness? - The pump chamber has moving parts that are in contact with the media; in order to achieve pump efficiency, the components in the pump chamber require minimal co-ordination.

When conveying abrasive media, this weakness is infinitely enlarged. The rapid wear of components within these pump cavities result in a decrease in volumetric efficiency, or even failure of the entire pump. This is bound to lead to the rapid rise in the use of costs and the frequent emergence of downtime.

In the transport of grinding media (such as mud, pulp), the commonly used vane pump: liquid pump and slurry pump or mud pump, all belong to the centrifugal pump. They are through the high-speed rotation of the rigid impeller to transport the media. To improve the wear resistance and extend the life of the pump, the use of wear-resistant metal (such as cast iron or wear-resistant alloy) manufacturing or impeller and pump liner lining. But the high impact of impurities still makes the downtime is too frequent; heavy maintenance tasks; a large number of accessories (such as impeller) procurement costs are high; sealed leakage will cause environmental pollution. In addition, the pump wear to a certain extent, no repair value, can only be scrapped.

In addition, there is the largest cost - the consumption of electricity, mud or pulp concentration, high proportion, poor mobility. Centrifugal pump delivery of such media is extremely inefficient, the actual efficiency of about 30-40%.

Conveying abrasive media commonly used volumetric pumps are diaphragm pumps and single screw pumps.

For example, the diaphragm pump uses one or two sheets of reciprocating wobble to cause the medium to flow between the internal ball valves. The abrasive media inevitably causes erosion and clogging of the ball valve, which requires frequent maintenance. Commonly used pneumatic diaphragm pumps require air supply, energy conversion (energy - compressed air - mechanical kinetic energy) efficiency is too low; In addition, the noise environment is also unbearable.

The screw pump conveys the medium through a change in the volume of the volumetric chamber formed by the stator and the rotor in the pump chamber. The rubber stator and the metal rotor are the core components of the screw pump. When conveying sludge, mud and other media, the abrasive particles will cause the gap between the stator and the rotor to expand and lead to increase the internal discharge, in order to maintain the flow can only increase the speed, which is exacerbated wear, until the stator and rotor need to be replaced. The problem of wear is not only for overcurrent components, but also the failure of the seal is only a matter of time, further leading to the erosion of the connecting elements such as connecting rods. The consequences of this wear are no exaggeration. The interval between the suspension period is often in the week or even the day; when repairing the screw pump, the whole pump must be completely disassembled to replace the set, the rotor, a single maintenance costs sometimes accounted for three percent of the new pump charges More than ten. This is not an indirect loss of downtime. And sometimes the scene can’t be handled, the need to remove the entire pump to the maintenance room.

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