SU64684A1 - Control button - Google Patents

Description

Universal control buttons are designed for remote control of coils of various devices: contactors, relays, circuit breakers, etc.

The scope of the control button is limited by its breaking capacity; Thus, for example, the universal button of a KhEMZ plant (type KU 1400) without intermediate devices cannot control multi-ampere contactors, since it does not have sufficient breaking capacity. The use of intermediate devices, in addition to increasing the cost, reduces the reliability of the device, since another additional device is introduced into the control circuit.

An increase in the bursting power of the universal button can be obtained by increasing the stroke of the contacts, which leads to an increase in the size of the button, or by forcefully arc arcing (when disconnected) with a special arc suppression device.

The proposed control button for extinguishing the arc at the contacts uses an air blast created by a stream of cold air. According to the invention, for

creating air blowing, air is used, which is compressed by pressing the button while it is moving and supplied to the contacts through the axial holes in the caps on which the fixed contacts are fixed.

The invention is illustrated in the drawing. FIG. 1 which shows a longitudinal section of the button in the initial position and in FIG. 2 is a longitudinal section in another projection at the final (operating) position of the button.

Indicated in the drawing; / - button body, 2 - push button, 5-spring, 4-air chamber, 5-pin bridge, 6-non-contact contacts, 7 - contact-bridge spring, S - caps with fixed contacts, 9-felt washer to create a seal.

When the button 2 is pressed, the air in the chamber 4 is compressed and exits through the holes in the caps S and the upper normally closed fixed contacts 6 to the points of rupture of the controlled circuit. The paths of air movement are shown in the drawing by arrows.

The motion of the extinguishing air jet occurs simultaneously with the movement of the contact bridge from the position of normally closed contacts to the position of normally open contacts, since this function is activated by a button that carries the moving contact and is simultaneously a piston in the cylinder (case of buttons).

In order for the air to be directed to the point where the arc originated, the gap has a sealing gasket, and the contacts at the points of origin of the arc mark the air outlet holes.

Air from the chamber is directed to the place where the arc is formed under pressure, which is irradiating to the stretching of the arc, to the cooling of the contacts, to the deionization of the space between the spaces, and

FIG. one

consequently, to the rapid extinction of the arc.

Ultimately, this is a kriyolite to the increase in the size of a knonka with its small dimensions.

P p with d: y with t and 3 about b e e; i m

A control button with fixed contacts which are closed by a movable contact bridge actuated by a push button, characterized in that the air blowing used to extinguish the spark at the contacts is carried out by air compressed during the movement of the kiopka, and for supplying air to the KOI-; axial bores are used in caps with fixed contacts attached to them.

FIG. 2

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