Cadmium disc for inductive circuit of spark test device, and machining method for cadmium disc

Abstract

The invention discloses a cadmium disc for an inductive circuit of a spark test device, and a machining method for the cadmium disc. The cadmium disc comprises a cadmium disc main body, and the cadmium disc main body is provided with two grooves. An edge intersection position of the grooves is provided with a chamfering part. The position of edge separation points of the grooves is provided with a semicircular part. The method comprises the steps: (a), marking the cadmium disc, determining the initial position, and building a coordinate system; (b), determining the intersection and separation positions of a tungsten filament with the external peripheral edges of the cadmium disc and the edges of the grooves, marking and gathering the track coordinates of the intersection and separation points, and making a table of the intersection and separation points; (c), determining the position of the semicircular part and the position of the chamfering part according to the coordinates calculated by step (b), carrying out the chamfering processing at the intersection point, and carrying out the semicircular processing at the separation point; (d), carrying out the corresponding chamfering and semicircular processing of the cadmium disc according to the positions determined at step (c). The method can effectively solve problems that a tungsten filament in a conventional spark test device is quick in wear speed, and the separation angles of the tungsten filament and the cadmium disc are not consistent.

Description

technical field [0001] The invention relates to a cadmium disk and a processing method thereof, in particular to a cadmium disk used for an inductive circuit of a spark test device and a processing method thereof, belonging to the technical field of explosion-proof electrical safety. Background technique [0002] Such as figure 1 Shown is the existing spark test device, which is composed of a group of electrodes arranged in the explosion vessel. Electrodes are used to generate closing and opening sparks in specified explosive test mixtures. One of the two contact electrodes consists of a cadmium disk electrode with two grooves. The other contact electrode consists of four tungsten wires fixed on the pole handle. [0003] Rotate the electrode holder to slide the tungsten electrode over the cadmium disc. The two shafts that drive the pole grip and the cadmium disc are meshed by non-conductive gears, and the gear ratio is 50:12. The rotating speed of the pole grip driven b...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a cadmium disc used in the inductive circuit of the spark test device and its processing method. The cadmium disc can effectively solve the problem of rapid wear of the tungsten wire in the existing spark test device and the inconsistent separation angle between the tungsten wire and the cadmium disc. The problem

[0010] By chamfering the groove of the cadmium disc, the problem of excessive wear of the tungsten wire and the cadmium disc during the contact process of invalid sparks can be solved; by semicircular treatment of the groove of the cadmium disc, the problem of tungsten The problem that the angle between the wire and the cadmium disc is inconsistent

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