SU369644A1 - DIGITAL CAMERA - Google Patents

Description

Arc-suppressing chambers are known, for example, high-voltage oil switches, which include a housing, contacts, an arc-suppressing gap, and a damping device that acts on the gas-dynamic processes during the operation of the switch and improves the arc damping characteristics. Damping devices can be made in the form of a piston attachment or in the form of an airbag.

However, installation of a piston attachment complicates the design, increases the size and weight of the arc chute, and the air cushion leads to a change in the arc chute characteristics of the chamber, and in some cases to a decrease in the reliability of the switch during operation, due to the dissolution of gases in the oil, a decrease in air volume. cushion and its damping properties. At the same time, quenching of the arc of small currents is delayed due to the fact that the air cushion significantly reduces the pressure build-up in the chamber when the small currents are turned off. Therefore, the volume of the air cushion is usually chosen to be small from the area. VIY providing low current quenching. However, this volume is usually not sufficient for the effective operation of an arcing device with an air cushion when large currents are switched off.

In order to increase the efficiency and reliability of the arcing chamber, as well as its shutdown power, the damping device is made in the form of an elastic sealed tank, for example, a bellows filled with gas. In order to prevent the increase of arc arc time at low currents, the elastic hermetic tank is filled with excessive initial pressure. In addition, the chamber can be installed additionally one or more elastic sealed tanks filled with gas, for example, with different initial pressure.

To create a pre-overpressure, an elastic hermetic tank can be placed with a preliminary pressing under the casing with openings. The specified reservoir can be divided into separate closed cells filled with gas, for example, in the form of a porous plastic with closed pores.

In order to simplify the design, the elastic sealed container may be made in the form of a hermetically sealed pipe of elastic material, for example, in the form of a toroid.

FIG. 1 shows the proposed arc-suppressing chamber with a damping device.

in the form of bellows installed in the lower part of the case, the general view; in fig. 2 - the same, with a damping device in the form of a disk of porous plastic with closed pores mounted on the bottom of the chamber.

In the inner cavity of the cylinder 1 of the chamber are arcing arrays 2, fixed contacts 5 and movable contacts 4.

Inside the cylinder of the chamber, a damping device 5 is also installed in the form of an elastic hermetic tank fixed, for example, to the bottom 6, or to the side wall of the cylinder, or to the holder 7. The said tank can be made in the form of a bellows or in the form of hermetically sealed at both ends pipes made of elastic material, either in the form of a toroid, etc.

When the switch is turned off in the cylinder of the chamber, pressure arises under the influence of an electric arc formed between contacts 3 and 4. The preliminary pressure in an elastic tank can be chosen so that when extinguishing small currents the indicated pressure in the chamber is lower than the pressure in the damping device.

With this arrangement of the chamber, the damping device does not cause a decrease in pressure in the chamber when extinguishing small currents, thereby improving the efficiency of the chamber in comparison with the known devices with an air bag. The proposed chamber allows a damping device of the required volume, based on the conditions for quenching medium and large currents, which cannot be achieved in the known chambers with air nodushku.

It is also possible that the chamber is made when several damping devices with different volumes and preliminary overpressures selected from the condition of the best extinction of small and large currents are installed in the power supply.

It should be noted that the installation of a damping device on the bottom of the chamber is most advisable, since after the arc extinguishes and the pressure in the chamber decreases, the damping device promotes the release of gases formed from the chamber when it is extinguished upwards, which is especially important for arc suppression devices when they are repeated in the AR cycle .

Due to the fact that the damping device can be located as in the upper,

so in the bottom of the camera and can have

necessary configuration setting it

practically does not cause lengthening of the camera.

Reducing the dimensions of the chamber and reducing the pressure inside the cylinder also allows for less stress on the inlets.

Subject invention

Claims (6)

1. An arcing chamber, such as an oil switch, comprising a cornus, contacts, an arcing gap, and a damping device, characterized in that In order to increase the efficiency and reliability of operation, as well as the power of the shutdown, the damping device is made in the form of an elastic sealed container, for example, a bellows filled with gas. 2. A chamber according to claim 1, characterized in that, in order to prevent an increase in arc quenching time at low currents, the elastic sealed reservoir is filled with gas under excessive initial pressure. 3. The camera on the PP. 1 and 2, characterized in that it additionally contains one or more elastic sealed containers filled with gas, for example, with different initial pressures. 4. The camera according to np. 1 and 2, characterized in that, in order to create a pre-excess pressure, an elastic hermetic tank is placed with a preliminary pressing under the casing with openings, 5. A chamber according to claim 1, characterized in that the elastic sealed tank is divided into separate closed cells filled with gas, for example, in the form of a porous plastic with closed pores. 6. A chamber according to claim 1, characterized in that, in order to simplify the construction, the elastic sealed container is made in the form of a hermetically sealed pipe of elastic material, for example, in the form of a toroid. (Reg. 2