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An anti-broken needle device of a calibration instrument

A technology of anti-breakage and calibration instrument, applied in the direction of measuring tube/pipette, etc., can solve the problems of high operator requirements, increased use cost, broken needle accidents, etc., to reduce use cost, provide use safety, and prevent damage Effect

Active Publication Date: 2022-04-01
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the quartz needle of the inorganic calibration instrument and the thin steel needle of the organic calibration instrument are relatively fragile. If there is misoperation or mechanical failure, it is easy to cause a broken needle accident.
After a broken needle accident, it must be replaced and re-adjusted, which places high demands on the operator and increases the cost of use

Method used

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  • An anti-broken needle device of a calibration instrument
  • An anti-broken needle device of a calibration instrument
  • An anti-broken needle device of a calibration instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1, such as figure 1 and figure 2 As shown, the present invention provides an anti-broken needle device for a standard matching instrument, which includes a base 1, a fixed plate 4, a slider 3, a pipetting needle 9, a position detection device and a flexible positioning device. The moving parts of the standard instrument are connected, the fixed plate 4 is installed on the base 1, and a slideway for the slider 3 to slide up and down is provided between the fixed plate 4 and the base 1, and the slider 3 is installed in the slideway. The pipetting needle 9 is fixed on the lower part of the slider 3 and protrudes from the lower end of the slideway. The flexible positioning device is used to apply a lateral contact force to the slider 3 so that the position of the slider 3 is fixed in the slideway. The position detection device is used to detect whether the position of the slider 3 in the slideway deviates and sends a control signal to the control system of the cal...

Embodiment 2

[0031] Example 2, such as image 3 As shown, the other structures are the same as in Embodiment 1, and the assembly method of the position detection device is different from that in Embodiment 1. Specifically, the fixed plate 4 is provided with a first through hole 12 leading to the slideway transversely, and the laser Transmitter 5 is installed in the first through hole 12, and described slide block 3 is provided with the second through hole 13 coaxial with first through hole 12, and described photoelectric receiver 2 is installed on base 1 and second. The position corresponding to the through hole 13.

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Abstract

The invention discloses an anti-broken needle device of a standard matching instrument, which comprises a base, a fixed plate, a slider, a liquid transfer needle, a position detection device and a flexible positioning device, and a device for the slider to go up and down is arranged between the fixed plate and the base. A sliding slide, the slide is installed in the slide, the pipetting needle is fixed at the bottom of the slide, and the flexible positioning device is used to apply a lateral contact force to the slide, so that the slide is fixed in the slide. The flexible positioning device includes a positioning ball, a positioning spring, and a positioning groove arranged on the side of the slider to match the positioning ball. A horizontal sliding hole is provided on the fixing plate, and the positioning ball can be freely slidably installed in the horizontal sliding hole for positioning. One end of the spring is in contact with the positioning ball, and the other end is fixed in the horizontal sliding hole. The elastic force of the positioning spring makes the positioning ball keep the pretightening force stuck in the positioning groove. The present invention can detect the deviation of the pipetting needle in time, can feedback the abnormal operation of the pipetting needle in time, and effectively prevents the abnormal breakage of the pipetting needle.

Description

technical field [0001] The invention belongs to the field of laboratory instruments and equipment, and relates to auxiliary equipment for a standard matching instrument, in particular to a broken needle device for a standard matching instrument. Background technique [0002] The standard preparation instrument is a kind of laboratory equipment that has become popular in recent years. It is widely used in conventional chemical laboratories. It has the advantages of simple use, high reliability, saving mother standard solution, and saving a lot of manpower. [0003] The current calibration equipment can be roughly divided into organic calibration equipment and inorganic calibration equipment according to different usage occasions. Generally, the capacity of the standard liquid of the organic standard preparation instrument is relatively small, and some reagents need to be protected from light and to prevent volatilization. Inorganic standard matching instruments generally hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01L3/02
CPCB01L3/02
Inventor 严明霞肖靖凯
Owner HUBEI UNIV OF TECH
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