A low loss peristaltic pump

Abstract

The invention relates to the technical field of fluid pumps, and discloses a low-loss peristaltic pump, which includes a pump head, a driver and a hose. tube, and the inner cavity of the extruded tube is covered with a hose and an extruded ball. The low-loss peristaltic pump, due to the randomness of the extrusion ball cutting angle, the mutual extrusion surface between the moving hose and the extrusion ball is also random, the extrusion ball is relatively uniform in pressure, and the material fatigue caused by bending The wear and tear are evenly distributed on the surface of the hose, its service life is greatly improved, and its elastic properties can also be kept unchanged for a longer working time to maintain stable operation. Secondly, the hose, squeeze tube and squeeze ball The size parameters of the hose are fixed, and the extrusion force between the hose and the extrusion ball is relatively stable. At the same time, because the extrusion ball is deformable, it will also absorb excessive pressure, and the bending degree of the hose is always kept in a reasonable range. Inside.

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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