RU2002504C1 - Electric pulse grinding device - Google Patents

Description

equipped with a sieve member 26 to which the material 28 for grinding is fed through a loading device 27. To recover the crushing products, the discharge crushing chamber 24 is provided with an opening 29.

Electropulse crushing device operates as follows.

When a high voltage pulse is supplied from the GIN through a high-voltage cable 6 to parallel-connected turns of the primary winding 2 of the core 1 of the induction transformer, a high-voltage pulse increased by the number of inductors arises at the high-voltage end 23 of the pipe 4. In this case, the coaxial line formed by the central 12 and external 13 conductors, and there is a high electric field voltage V GIN between the self-sharpening electrode 23 and the crushed material 28 in the crushing chamber 25 with technical second liquid. As a result, a conduction channel is formed in the milled material 28. In this case, the electric current circuit is closed on ground 8 and 14 through the housing of the crushing chamber 25, the coaxial contact 16, the housing of the vacuum chamber 15, the housing 5 of the induction transformer, the diode 9, or the pulse current generator 11. The intensity of the extension of the conduction conduit is determined by the current with a high slope of the front front, which is provided by a low impedance line. The operating voltage between the center and outer conductors of the first and second sections of the lines is the same; therefore, the gap that determines the level of insulation with a high voltage pulse of the order of s is the same for the two sections. The approximate value of the impedance of the coaxial line is determined by d b the diameter of the outer conductor 13;

makes ratio 60 In

where d b is the diameter of the inner conductor 12. And since D, where A is the gap between the outer 13 and inner 12 of the conductor - d b

mi then -

Therefore, the corresponding -2 D

the wearing will be the smaller, and the ratio and wave resistance the smaller for a fixed D, the greater d. The low wave impedance of the second section guarantees the formation of a high steepness of the leading edge of the current even when the individual inductors of the induction transformer work poorly.

5 The current flowing through the gap between the self-sharpening high-voltage electrode 23 and the crushed material 28, as well as through the induction sensor 10, triggers the GIT, the current of which provides a high degree of grinding (destruction) of the material 28. The self-sharpening high-voltage electrode 23 is made of nested from each other several, for example three or five cylinders of metals with different refractories, decreasing from the inner cylinder to the outer. For example, the central core may be tungsten, and the outer cylinder - steel. As the electrode 23 is burned by the mechanism 24, it is fed into the discharge chamber 25 through the pipe 4, the central conductor 12 of the coaxial line and the collet contact 22.

5

Such an electropulse device makes it possible to obtain high voltage pulses of more than 500 kV at a transmission frequency above 10 Hz and a capacitance of the coaxial line

0 above 1000 pF. and reliability is ensured by the design of a coaxial line with vacuum isolation.

(56) Copyright certificate of the USSR 5 No. 706917, cl. H 03 K 3/59, 1975.

Claims (2)

1. ELECTRIC PULSE CRUSHING DEVICE containing a source of high voltage pulses connected to a pulse current generator and a high voltage electrode immersed in a technical fluid, which is filled with a discharge chamber, characterized in that the source of high voltage pulses is made in the form of an induction transformer, the secondary winding of which is from the low side voltage earthed through a diode and an induction current sensor, it is made in the form of two sections interconnected with vacuum isolation, the first section being located on the section of the induction transformer and consisting of a conductive pipe and: - electrodes connected to the transformer body, and the second section having a smaller wave impedance, consists of a conductive pipe of a larger diameter than the first, and has a collet contact at the end, while the high-voltage electrode passes through these pipes and the fact that the high-voltage electrode is equipped with self-sharpening. fed by a feeder 2. The device according to claim 1, characterized by a camera.