Assembling method for quality analytical instrument with four-pole rods

Abstract

The invention belongs to the technical field of quality analytical instrument and particularly relates to an assembling method for a quality analytical instrument with four-pole rods. The assembling method comprises the following steps of: uniformly arranging four four-pole rods in an insulation cup, wherein dowel pins on two ends of an outer circle of the four-pole rods are firmly matched with through holes uniformly distributed on the outer wall of the insulation cup; regulating the tangential matching of a positing clamp and the four-pole rods to determine the relative displacement of the four four-pole rods; sealing or welding the contact surfaces of the dowel pins on the upper ends of the four-pole rods and the insulation cup; putting the whole device in an appropriate environment according to the expansion and concentration coefficient of the positioning clamp material; getting out the positing clamp according to the expansion and concentration principle to complete assembling the whole device. The assembling method provided by the invention uses the high-precision positing clamp to position the relative displacement of the four four-pole rods, and implements the assembling according to the circular surface tangency and the expansion and contraction principle in physics. Moreover, the assembling method reduces the processing difficulty coefficient and improves the qualified rate of the whole four-pole quality analytical instrument.

Description

technical field [0001] The invention belongs to the technical field of mass analysis instruments, and in particular relates to an assembly method of a quadrupole mass analyzer. It is a method of precision mechanically assembling a tuned quadrupole mass analyzer device. Rely on precise assembly and adjustment to achieve the precise size of the quadrupole mass analyzer assembly, ensure the performance of the entire quadrupole mass analyzer, and increase the rigidity of the quadrupole mass analyzer device. Background technique [0002] Mass spectrometers have high sensitivity and resolution in substance analysis and component identification. The separated ions are separated by size, and then these separated ions are detected by an ion detector to obtain a mass spectrum. Through the analysis of the mass spectrum, the chemical composition, structure and content of the detected substance can be obtained. In a mass spectrometer, the part that ionizes substances is called the ion...

AI Technical Summary

Problems solved by technology

The quadrupole mass analyzer has a relatively simple structure and fast scanning speed, but its mass resolution and mass range are not high, and the quadrupole electrodes have high requirements for precision, so processing and assembly are difficult

This type of structure has extremely high requirements on the position accuracy of the positioning hole and the size and shape accuracy of the hole, and it is very difficult to process and assemble.

In addition, there are still some schemes that rely on manual assembly and adjustment, but it is more difficult to achieve nanometer-level dimensional position accuracy of quadrupoles and devices

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