Quincunx cam plunger pump and flow injection analysis device

Abstract

The invention discloses a quincunx cam plunger pump and a flow injection analysis device. The pump comprises a pump housing, a motor, a first transverse rotating shaft, a quincunx cam, a balance wheel and a pump head shell; an installation side plate is fixed to one side of pump housing; the motor is fixed on the installation side plate; the two ends of the first transverse rotating shaft are rotationally connected to the two side walls of the pump shell, and the first transverse rotating shaft penetrates through the installation side plate and is fixedly connected with the output end of the motor through a transmission mechanism; the quincunx cam fixedly sleeves the first transverse rotating shaft; one side of the top of the balance wheel is in contact with the quincunx cam; and the pump head shell is fixed to a front panel of the pump housing in a penetrating mode, a pump cavity is formed in the pump head shell, a push rod is arranged in the pump head shell, the other side of the top of the balance wheel is in contact with the head end of the push rod, the pump cavity is connected with an inlet one-way valve and an outlet one-way valve, and the push rod is sleeved with a reset spring. The quincunx cam plunger pump can completely replace a traditional peristaltic pump in a flow injection analysis device, so that the problems that a pump pipe of the peristaltic pump is aged, the service life of the pump pipe is short, the flow is unstable, and even the flow is cut off are solved.

Description

technical field [0001] The invention relates to the technical field of plunger pumps, in particular to a quincunx cam plunger pump and a flow injection analysis device. Background technique [0002] The Chinese patent application number is 202121687957X, which is called a plunger pump and a flow injection analysis device composed of a plunger pump. It discloses a plunger pump. The motor drives the first horizontal shaft to rotate through the transmission mechanism, so that the upper The cam pushes the two balance wheels to swing around the second horizontal shaft, and the balance wheel pushes the push rod to move back and forth, thereby realizing the action of sucking liquid from the inlet check valve on the plunger pump and pushing liquid out from the outlet check valve. Therefore, the plunger pump adopts the cam transmission method to replace the traditional peristaltic pump. Since the cam moves linearly according to the Archimedes curve, the flow rate and flow rate of the...

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Problems solved by technology

[0003] However, when the peristaltic pump in the traditional flow injection analysis system works, it outputs the solution one by one, which we call turbulent flow. In the flow injection method, this flow is more conducive to the mixing and reaction of reagents, while the above column The cam in the plug pump is a traditional curved cam, and the cam completes the extraction and push of the solution every revolution, and its flow mode does not match the flow mode of the peristaltic pump. Therefore, in some flow injection analysis devices, the cam The plunger pump cannot fully achieve the same effect as the peristaltic pump

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