Vibrating-type material level switch suitable for flammable and explosive environment with high temperature and high pressure

Abstract

The invention discloses a vibrating-type material level switch suitable for flammable and explosive environment with high temperature and high pressure. The vibrating-type material level switch comprises a vibrating head, a vibrating rod, a lead electrode, piezoelectric ceramic, a wire pressing copper sheet, a pressing copper column, an electrode lead, a mounting base, a vibrating rod copper sleeve, a supporting copper column, an adaptor circuit board and a pressing screw; the lower end face of the pressing copper column is a smooth plane with the same size as the piezoelectric ceramic; an inner thread is arranged in the lower end of the pressing copper column and cooperates with a screw rod on the rear end face of the vibrating head, the piezoelectric ceramic is fastened between the pressing copper column and the pressing head, and close cooperation is achieved; the lead electrode is located in the middle of the piezoelectric ceramic; the vibrating rod is a cylindrical hollow straightrod, one end of the vibrating rod is connected to the vibrating head, and the other end of the vibrating rod is connected with the vibrating head copper sleeve; the vibrating rod and the front end ofthe vibrating head jointly form a material level gauge external-sensitive part; the mounting base is welded to the vibrating rod; the wire pressing copper sheet is tightly attached to the inner diameter of the vibrating rod; meanwhile, a groove is pressed in the wire pressing copper sheet, and the electrode lead penetrates through the groove and the inner wall of the vibrating rod.

Description

technical field [0001] The invention belongs to the field of material level switches, in particular to a vibrating material level switch suitable for high temperature, high pressure, flammable and explosive environments. Background technique [0002] In the process of industrial production and manufacturing, it is often necessary to monitor the position of solid particles or liquids such as coal powder, flour, grains, plastic particles, detergents, etc., to control the industrial production process. [0003] Vibrating level switches are ideal for monitoring and controlling the level of solids or liquids in silos or containers. The general working principle is as follows: a periodic voltage signal is applied to the piezoelectric ceramic, and the piezoelectric ceramic is vibrated through the inverse piezoelectric effect, and the vibrating rod is driven to resonate; at the same time, the resonance amplitude or frequency is monitored through the piezoelectric effect ; When ther...

AI Technical Summary

Problems solved by technology

[0005] The material level gauge cannot adopt an integrated structure design, cannot achieve reliable sealing, and cannot be used in high temperature and high pressure environments

[0006] The flameproof design cannot be realized, and it cannot be used in high dust, flammable and explosive environments

[0007] The strength of the level gauge is reduced, and high-strength design cannot be realized. It is not suitable for high-strength and strong impact environments, which reduces the reliability of the level gauge.

[0008] The driving voltage is high and the power consumption is high, so it is not suitable for use in flammable and explosive environments

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