Low-loss peristaltic pump

Abstract

The invention relates to the technical field of fluid pumps, and discloses a low-loss peristaltic pump, which comprises a pump head, a driver and a hose. The driver is installed in the middle of the pump head, an extrusion pipe is fixedly installed on the inner side wall of the pump head, and the hose and an extrusion ball are arranged in an inner cavity of the extrusion pipe in a sleeving mode. According to the low-loss peristaltic pump, since the cut-in angle of the extrusion ball is random, mutual extrusion surfaces between the movable hose and the extrusion ball are random; the extrusion ball bears relatively uniform pressure; material fatigue and loss caused by bending are uniformly distributed on the surface of the hose; service life is greatly prolonged; the elastic property can also be kept unchanged within a longer working time, and operation is kept stable; since the size parameters of the hose, the extrusion pipe and the extrusion ball are fixed, the extrusion force betweenthe hose and the extrusion ball is relatively stable; and meanwhile, since the extrusion ball is deformable and can absorb excessive pressure, the folding bending of the hose is always kept in a reasonable interval.

Description

technical field [0001] The invention relates to the technical field of fluid pumps, in particular to a low-loss peristaltic pump. Background technique [0002] see Figure 5 , a peristaltic pump usually includes a driver, a pump head, and a hose. It operates like a finger squeezes a hose filled with liquid. In fact, a peristaltic pump is a section of pump tubing between two rotating rollers that forms a "pillow" shape of fluid. The volume of the "pillow" depends on the inner diameter of the pump tube and the geometric characteristics of the rotor, so the peristaltic pump has high precision. [0003] After a long period of operation, since the contact surface between the rotary roller and the hose remains unchanged, the position where the hose is folded in half is always in one plane, which makes the service life of the hose relatively low and increases the consumption of the hose. The elasticity of the pillow will also be reduced, and the amount of liquid absorbed during re...

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Problems solved by technology

[0003] After a long period of operation, since the contact surface between the rotary roller and the hose remains unchanged, the position where the hose is folded in half is always in one plane, which makes the service life of the hose relatively low and increases the consumption of the hose. The elasticity of the peristaltic pump will also be reduced, and the amount of liquid absorbed will change during recovery, and the volume of the "pillow" will become uncertain, which will reduce the accuracy of the peristaltic pump.

[0004] see Image 6 , due to the existence of tolerances, there is always a deviation in neutrality. In actual use, when the roller squeezes the hose, the pressure on the hose is not the same. There is a large pressure in a local area, and the hose is folded in half. tube life

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