Composite peristaltic pump

Abstract

A composite peristaltic pump comprises a pump base, a mandrel, an assembling bearing, an upper pump head, a lower pump head, an upper pump casing, a lower pump casing, limit bases, pump head covers, clamping grooves, an electromagnetic base, pump casing covers and a stepping motor, wherein the mandrel is fixed on the pump base through the assembling bearing and fixedly connected with a shaft of the stepping motor, the upper pump head and the lower pump head are arranged on the mandrel in overlapped mode, the upper pump head is formed by a driving wheel, a driven wheel and a ratchet wheel mechanism, and the electromagnetic base is fixed in the pump base and controls moving, opening and closing of the upper pump casing and the lower pump casing through electromagnetic force. The clamping grooves are arranged at two ends of the pump base and are in shaft connection with the limit bases arranged at two ends of the pump base, and the flexibly rotating clamping grooves can be used for ensuring that positions of two pump pipes in the pump heads are reliable. The ratchet wheel mechanism is arranged between the driving wheel and the driven wheel, the driving wheel can drive the driven wheel to rotate unidirectionally, the upper pump head stops rotating when the motor shaft rotates in the reverse direction, and therefore the purpose of pumping liquid synchronously and evenly in the reverse direction in proportion is achieved.

Description

technical field [0001] The invention relates to a peristaltic pump, in particular to a compound peristaltic pump with multiple functions. Background technique [0002] The conventional peristaltic pump widely used at present is to pump the liquid by alternately squeezing and releasing the elastic pump tube by the roller of the pump head of the peristaltic pump, which has the characteristics of no pollution, good sealing and convenient maintenance; Proportional pumping is used to mix two liquids, and at the same time, when one of the liquids needs to be pumped in reverse, it can only rely on installing multiple peristaltic pumps, which has the disadvantage that multiple sets of power control systems can be independently controlled, which not only increases The number of equipment is increased, the cost input is increased, and it is more difficult to control the proportional accuracy, operation and installation. Contents of the invention [0003] In view of the deficiencies...

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Problems solved by technology

[0002]The conventional peristaltic pump widely used at present is to pump the liquid by alternately squeezing and releasing the elastic pump tube by the roller of the pump head of the peristaltic pump, which has no pollution and tightness Good and easy maintenance; but when it is necessary to pump two kinds of liquids synchronously, uniformly and in proportion for mixed use, and at the same time it is necessary to pump one of the liquids in reverse, it can only rely on installing multiple peristaltic pumps. This defect not only increases the number of equipment and increases cost investment, but also increases the difficulty of control ratio accuracy, operation and installation, etc.

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