SU68524A1 - Explosion-proof electric lamp - Google Patents

Description

The invention relates to an explosion-proof electric lamp with a durable metal casing, having a light hole and containing an electric lamp and an automatically operating switch (breaker), which is triggered by the danger of lamp damage.

A distinctive feature of the invention is that the light opening of the lamp housing is completely blocked by an ion breaker flask made of a transparent material. With this design, access of the ambient air to the lamp through the light opening is possible only after the bulb breaks down, which, when inertiated, opens the lamp before the lamp is turned off before its destruction occurs.

In the diagram, the proposed lamp is shown in section. The ion breaker 3 is located in the power supply circuit of the lamp 2 (connected in series either directly to the lamp circuit or to the primary side of the transformer that supplies the lamp).

15

The transparent bulb of the ionic switch opens the light hole of the strong metal casing 7, as a result of which access to the lamp 2 through the light hole is possible only after the bulb of the ionic breaker is destroyed. And since the damage to the flask tripped 3 will lead to the shutdown of the latter, then the lamp 2 will also be turned off.

The bulb 3 can have a different shape: a cylinder, a ball, a flat disk, lentils, etc. It is only necessary that it overlaps the light hole.

The electrodes of the breaker can be located in the flask itself or in a special cylinder connected to the flask by a connecting tube; the latter forms an explosion-proof channel of such diameter (less than 5-mm) that the combustion of the air-methane mixture inside the channel is excluded, and of such length (more than 10 mm) that the possibility of air-methane mixture ignition in the space surrounding the flask due to passage through channel products227

Combustion of an explosion if it occurs in the cylinder of the ion breaker.

The housing 7 can be of the most varied design and can be equipped with devices commonly used in luminaires, in particular, interlocks that ensure the explosion safety of the luminaire.

For example, it is advisable to provide in the power supply circuit of the lamp 2 and the breaker 3 interlocking contacts, which close the power supply circuit when the lamp 2 is inserted into the casing / under the condition that the light hole is closed by the ion breaker bulb.

Subject invention

An explosion-proof electric luminaire with a strong metal casing, having a light hole and enclosing an electric lamp and an automatically operating switch that operates when the lamp is damaged, characterized in that the light hole of the casing is completely blocked by an ion switch made of transparent material, so that access to the lamp the light hole is possible only after the destruction of the bulb opened.