Liquid feeding constant-pressure device of fully-automatic biochemical analyser

Abstract

The invention discloses and provides a liquid feeding constant-pressure device of a fully-automatic biochemical analyser. The liquid feeding constant-pressure device comprises a hydraulic pump, a water inlet hose, a constant-pressure valve core, a water outlet hose and a water return hose, wherein the constant-pressure valve core is provided with a cavity along a length direction; the hydraulic pump is communicated with the cavity by the water inlet hose; a hose fixing part, an annular groove and a pressure adjustment part are sequentially arranged on the outer circumferential surface of the constant-pressure valve core from front to rear; at least one water outlet hole communicated with the cavity and the water outlet hose is formed in the constant-pressure valve core and located in front of the hose fixing part; at least one water return hole communicated with the cavity and the water return hose is formed in the annular groove; the water return hose is in interference fit with the hose fixing part and the pressure adjustment part. The liquid feeding constant-pressure device disclosed by the invention can be widely applied to the field of fully-automatic biochemical analysers.

Description

technical field [0001] The invention relates to a liquid sending constant pressure device for a fully automatic biochemical analyzer. Background technique [0002] The biochemical analyzer is a biochemical analysis in which some or all of the steps of sampling, adding reagents, removing interference, mixing, heat preservation, colorimetry, result calculation, writing reports and cleaning are completed by instruments that imitate manual operations. It can perform analysis and determination of various reaction types such as timing method and continuous monitoring method. In addition to the determination of general biochemical items, some can also measure special compounds such as hormones, immunoglobulins, and blood drug concentrations, as well as the application of analytical methods such as enzyme immunity and fluorescence immunity. It has the characteristics of fast, simple, sensitive, accurate, standardized, and trace. Existing biochemical analyzers need to transport cle...

AI Technical Summary

Problems solved by technology

Existing biochemical analyzers need to transport cleaning liquid to clean the instrument. Existing liquid delivery devices generally include infusion, a delivery pipeline connected with an infusion pump, a pressure control valve installed on the delivery pipeline to control the flow of liquid, and The pressure gauge used to measure the flow pressure in the pipeline. The existing liquid delivery device mainly uses a solenoid valve or a mechanical valve as a pressure control valve, but the infusion of the solenoid valve is not stable, and the swing range of the pressure gauge is relatively large. Under normal circumstances, the solenoid valve will be flushed open, and at the same time, the pipeline will be damaged and affect the normal work. The mechanical valve is easily affected by impurities and wear, causing the pressure valve to be blocked and flushed open, or the flow control after wear Not very accurate, there is some inconvenience

Images