Needle breakage preventing device of standard solution preparation 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, broken needle accidents, increased use costs, etc., achieve simple and reliable mechanical structure, provide safety in use, prevent damage effect

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, broken needle accidents, increased use costs, etc., achieve simple and reliable mechanical structure, provide safety in use, prevent damage effect

CN112108199AActive Publication Date: 2020-12-22HUBEI UNIV OF TECH
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  • Needle breakage preventing device of standard solution preparation instrument
  • Needle breakage preventing device of standard solution preparation instrument
  • Needle breakage preventing device of standard solution preparation 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 a needle breakage prevention device of a standard solution preparation instrument. The needle breakage prevention device comprises a base, a fixing plate, a slider, a pipettingneedle, a position detection device and flexible positioning devices, wherein a slideway for the slider to slide up and down is arranged between the fixing plate and the base, the slider is mounted in the slideway, the pipetting needle is fixed at the lower part of the slider, and the flexible positioning devices are used for applying a lateral contact force to the slider so as to allow the position of the slider in the slideway to be fixed. Each flexible positioning device comprises a positioning ball, a positioning spring and a positioning groove which is formed in the side portion of the slider and matched with the positioning ball, wherein a transverse sliding hole is formed in the fixing plate, the positioning ball is installed in the transverse sliding hole in a free sliding mode, one end of the positioning spring makes contact with the positioning ball, the other end of the positioning spring is fixed in the transverse sliding hole, and the positioning ball keeps pre-tighteningforce and is clamped in the positioning groove through the elastic force of the positioning spring. According to the invention, the deviation condition of the pipetting needle can be detected in time, the abnormal operation of the pipetting needle can be fed back in time, and the pipetting needle is effectively prevented from being broken due to abnormity.

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

Patent Timeline
22 Dec 2020
Publication
CN112108199A
IPC
B01L3/02
CPC
B01L3/02
Inventors
δΈ₯明霞; 肖靖凯