Sampling and liquid level detection device for automatic sampling system

Abstract

The invention discloses a sampling and liquid level detection device for an automatic sampling system, which belongs to the technical field of medical, food testing and biological experimental equipment. The device is characterized in that: an elastic board is arranged on a sampling arm beam; the inner end of the elastic board is fixed with the sampling arm beam; a sampling nozzle connecting mechanism vertically runs through the sampling arm beam to be fixed with the outer end of the elastic board; a sampling nozzle in-place detection sensor is fixed at the outer end of the sampling arm beam;a sampling nozzle in-place separation blade is arranged on the sampling nozzle in-place detection sensor and the outer end of the elastic board; a negative pressure generation mechanism and a plungerpump are in closed communication with the sampling nozzle connecting mechanism by a three way valve and a pressure difference sensor; and the sampling nozzle connecting mechanism is a conical pipe body. The device has the advantages of 1, avoiding the risk of cross contamination caused by spur sampling adopted by most of conventional apparatuses; and 2, avoiding the high cost of one-off conductive plastic sampling nozzles mostly independent on import at present by adopting ordinary sampling nozzles so as to reduce the apparatus cost.

Description

technical field [0001] The invention belongs to the technical fields of medical inspection, food inspection and biological experiment equipment. Background technique [0002] In the process of medical testing, food testing, and biological experiments, ELISA and CLIA are routine testing methods in clinical laboratories. The current testing process is to add samples and reagents on a 96-well plate, then incubate and wash the plate , data measurement and other work, the workload of adding samples and reagents is the largest in the whole process, and the accuracy of sample addition and position accuracy play a key role in the entire detection process. At present, there are mainly two methods for adding samples and reagents in China: manual and automatic. Due to limited conditions in small and medium-sized medical institutions in my country, the sampling process is all done manually, and there are errors in the position of the sample and the accuracy of the sample, which affects...

AI Technical Summary

Problems solved by technology

Due to limited conditions in small and medium-sized medical institutions in my country, the sampling process is all done manually, and there are errors in the sampling position and sampling accuracy, which affect the test results.

However, the imported automatic sampling system has the disadvantages of high cost, large volume, complicated operation and high maintenance cost, so it is difficult to be popularized.

[0003]The sampling mechanism is the core in the automatic sampling system. The existing domestic equipment is not accurate in absorbing and dispensing liquid, while foreign equipment is expensive

In addition, the existing sampling equipment also has the problem of cross-contamination between samples, which seriously affects the quality of inspection work.

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