Double-path vertical extrusion type peristaltic pump

Abstract

The invention relates to the technical field of peristaltic pumps, and discloses a double-path vertical extrusion type peristaltic pump. The double-path vertical extrusion type peristaltic pump comprises a pump head, two paths of rubber pipe guide grooves are formed in the pump head, and rubber pipes are installed in the guide grooves; and a second extrusion block limiting groove is formed in the middle of the pump head, a first switch block limiting groove is formed in the lower portion of the pump head, a third switch block limiting groove is formed in the upper portion of the pump head, and four full-thread through holes are formed in the four corners of the pump head. A first switch block, a second extrusion block and a third switch block are arranged below the rubber pipes, the first switch block, the second extrusion block and the third switch block are connected with three trapezoidal thread transmission heads through trapezoidal transmission threads, and the three trapezoidal thread transmission heads are connected with a first brushless motor, a second brushless motor and a third brushless motor respectively. According to the double-path vertical extrusion type peristaltic pump, the fault-free service cycle of equipment can be effectively prolonged, and the consistency of two paths of flow, the miniaturization of the equipment and the accuracy of customized flow are improved.

Description

Technical field [0001] Technical Field The present invention relates to a peristaltic pump, in particular perpendicular, to a squeeze type dual peristaltic pump. Background technique [0002] The peristaltic pump is a common fluid delivery device is mainly used to transport a variety of liquids, compared to the conventional centrifugal pumps, peristaltic pumps are widely applied to the flow metering conveyor, plus a small flow injection analysis apparatus, and the fluid delivery device and other drugs in various fields, has good flow and flow stability in the accuracy of fluid delivery. [0003] Using a common peristaltic pump is driven by rotation of the pressing motor power module hose alternately pressed by the elastic hose to complete opening and closing of liquid delivery module often squeeze rollers, the motor is a stepper motor often. Peristaltic pump controlling flow rate used is generally used to control the rotation angle of the stepping motor and the rotational speed, ...

AI Technical Summary

Problems solved by technology

Even if the existing peristaltic pump is in the working gap, when the power is not turned on, the hose is always pressed by the rollers, and the pump tube can only rebound when the motor rotates. In this case, the life of the hose will be greatly reduced. With the prolongation of the use time of the hose, the elasticity of the hose decays, and the flow rate of the peristaltic pump also decays, resulting in inaccurate flow or the need to frequently replace the hose to ensure the accuracy of the flow; at the same time, the existing peristaltic pumps are all In the way of rolling and extrusion, the hose will be subjected to tangential tension, which will easily cause the wall thickness of the hose to change. With the extension of use time, the hose will be stretched by rolling and extrusion, which will further affect the stability and accuracy of the flow. In addition, most of the existing peristaltic pumps use stepping motors, and there are errors in the rotation angle and speed of the stepping motors. At the same time, there are problems such as stepping out of the stepping motors, resulting in flow errors and repeating the same amount of liquid delivery. There is a large error in the flow rate of each delivery of the liquid. In the case of micro-flow delivery or high precision requirements for a single flow, the existing peristaltic pumps are difficult to meet the demand. At the same time, the existing peristaltic pumps need to Frequent replacement of hoses to ensure the accuracy and stability of the delivery flow greatly increases maintenance costs and shortens the trouble-free cycle of equipment and instruments

The existing dual-channel peristaltic pump has the problem of unequal flow in each channel due to factors such as structural and manufacturing errors, and it is difficult to meet the requirements for applications that require equal flow in each channel.

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