Corrugated pipe metering pump

Abstract

The invention relates to a corrugated pipe metering pump which comprises a bracket, an electromagnetic valve, a direct-current speed reducing motor, a cam and a corrugated pipe, wherein the upper part of the corrugated pipe is communicated with a liquid inlet and outlet pipeline of the electromagnetic valve through a corrugated pipe joint; a return spring is sleeved outside the corrugated pipe; the lower part of the closed corrugated pipe is connected with a transmission rod; the transmission rod passes through a nut; a bearing is installed at the bottom end of the transmission rod; the bearing is always in contact with the rim of the cam; the rotary cam drives the corrugated pipe through the transmission rod to extend and shrink to enable the corrugated pipe to suck and discharge liquid; the nut is matched with a corrugated pipe nut seat for supporting the corrugated pipe; and the deformation stroke of the corrugated pipe is adjusted by adjusting the screw-in depth of the nut in the corrugated pipe nut seat, thereby changing the liquid sucking amount and the liquid discharging amount of the corrugated pipe. The invention has the advantages of reasonable structure, simple and reliable power transmission, adjustable corrugated pipe displacement, no radial deformation, high repeated liquid feeding accuracy and adjustable pump displacement, and is suitable for occasions with the requirement of variable pump displacements.

Description

technical field [0001] The invention relates to a metering pump for accurately filling trace reagents, in particular to a novel bellows metering pump. Background technique [0002] The bellows metering pump changes the volume of the bellows cavity periodically through axial deformation, and with the cooperation of the suction and discharge valve, realizes the process of suction and discharge. It is widely used in biochemical analysis, clinical testing, water treatment, pharmaceuticals, etc. in industrial processes. Chinese patent 200820015388.2 relates to the metering pump in the chemical supply system of the uniform glue equipment. The pump body of the high-precision photoresist distribution pump is a circular cavity with openings at both ends, and the structure of the pump body is a structure with two internal and external cavities. A retractable bellows is arranged in the inner cavity of the capsule, one end of the connecting part of the bellows is installed on the inner...

AI Technical Summary

Problems solved by technology

At present, the bellows pumps on the market all have the problem that the displacement of the bellows cannot be adjusted, and the use is not flexible enough to meet the requirements of more applications. Moreover, the bellows are all made by mold opening, and they are easily deformed in the radial direction during work, which affects Delivery stability

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