Ball type peristaltic pump

Abstract

The invention discloses a ball type peristaltic pump. A fixed part comprises a main body, wherein the main body is provided with an accommodating cavity and a hose retention channel; a rotating part is a columnar part provided with a T-shaped central hole, and is rotationally arranged in the accommodating cavity, a rotating shaft of a motor penetrates through a center hole of a base plate and is inserted into the T-shaped central hole of the rotating part, a U-shaped groove is annularly formed in the outer surface of the rotating part, spherical grooves are formed in the upper bottom surface, the lower bottom surface and the inner side surface of the U-shaped groove correspondingly, and the three spherical grooves form a three-point type ball fixing groove; and a plurality of balls are arranged in the U-shaped groove and are correspondingly positioned in the three-point type ball fixing groove, the balls can rotate along with the rotation of the rotating part and can freely rotate at the three-point type ball fixing groove without being disengaged, and in the rotating process of the rotating part, at least one ball can realize complete extrusion on a hose arranged in the hose retention channel. The pump has the advantages that the flow stability and the flow accuracy are higher, and the pulse problem can be conveniently weakened.

Description

technical field [0001] The present invention relates to the technical field of peristaltic pumps, in particular to a ball-type peristaltic pump. Background technique [0002] Peristaltic pump is a commonly used liquid delivery device, which has good stability in the process of liquid transportation, and is widely used in fields that require accurate quantitative and micro-flow liquid transportation. At present, the commonly used peristaltic pumps are of roller type and ball type according to the different extrusion parts. Among them, during the operation of the roller-type peristaltic pump, the roller as the extrusion unit needs to rotate around the central axis arranged at the center of the roller, so it is difficult to miniaturize. The ball-type peristaltic pump has a great technical advantage in the field of miniaturization and multi-channel applications due to the cancellation of the central axis setting in the center and the replacement of traditional rollers with ball...

AI Technical Summary

Problems solved by technology

[0003] However, in the existing ball-type peristaltic pumps, the balls used are all arranged on the internal rotating parts that rotate synchronously with the motor shaft. Due to the influence of processing technology and processing accuracy, it is difficult to ensure that the positions of each roller are consistent. Therefore, each ball squeezes the hose differently, which directly affects the stability and consistency of the flow rate of the peristaltic pump.

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