Explosion-proof housing

Patent metadata

Field	Value
Publication number	US-11969613-B2
Application number	US-201917271508-A
Country	US
Kind code	B2
Filing date	Aug 9, 2019
Priority date	Aug 27, 2018
Publication date	Apr 30, 2024
Grant date	Apr 30, 2024

Abstract

An explosion-proof housing having external walls, which enclose a housing interior so as to be proof against ignition penetration relative to an atmosphere at risk of explosion. At least one insert is arranged in at least one outer wall. The insert facilitates a gas flow between the housing interior and an environment around the housing. The at least one insert is configured in such a way that a gas flow having a sufficient mass flow or volumetric flow rate is permitted, but a flow connection which is proof against ignition penetration is produced. Attached to the outer wall having the at least one insert is a guiding means which together with the relevant outer wall delimits a flow channel. The flow channel defines a main flow direction of a main gas flow through the flow channel substantially parallel to the directly adjoining outer wall. In this way, the gas exchange between the environment and the housing interior can be improved and facilities arranged in the housing interior can be cooled.

First claim

The invention claimed is:

1. An explosion-proof housing, comprising:
a plurality of outer walls that enclose a housing interior and separate the housing interior in an explosion-proof manner from an explosive atmosphere in an environment;
at least one gas-permeable flameproof insert provided in at least one of the plurality of outer walls, the at least one gas-permeable flameproof insert having an inner side facing the housing interior and an outer side facing the environment;
at least one guide device defining a flow channel adjacent to either the inner side or the outer side of the at least one gas-permeable flameproof insert in which gas flows through the at least one gas-permeable flameproof insert; and
wherein the at least one guide device is configured to form a main gas flow having a main gas flow direction along the outer side or the inner side of the at least one gas-permeable flameproof insert in the flow channel and the flow channel comprises a channel inlet and a channel outlet arranged with distance to the channel inlet in the main gas flow direction, the channel inlet and the channel outlet open in the environment and the at least one gas-permeable flameproof insert is arranged between the channel inlet and the channel outlet in the main gas flow direction, the channel inlet being arranged vertically below the channel outlet and the at least one guide device having multiple guide walls that enclose the flow channel in a circumferential direction around the main gas flow direction only on three sides and limit the flow channel together with an adjacent one of the plurality of outer walls.

2. The explosion-proof housing according to claim 1 , wherein the guide device is arranged outside the housing interior and comprises a cover.

3. The explosion-proof housing according to claim 1 , wherein a length of the flow channel in the main gas flow direction is about 50% to 75% of a length of the at least one of the plurality of outer walls the at least one gas-permeable flameproof insert is provided in.

4. The explosion-proof housing according to claim 1 , wherein a cross-section of the flow channel is smaller than a sum of all outer or inner surfaces of the at least one gas-permeable flameproof insert adjoining the flow channel.

5. The explosion-proof housing according to claim 1 , wherein the channel inlet or the channel outlet is formed by the at least one gas-permeable flameproof insert.

6. The explosion-proof housing according to claim 1 , wherein gas flows in or out of the flow channel only through at least one gas-permeable flameproof insert between the channel inlet and the channel outlet and apart therefrom the flow channel is closed.

7. The explosion-proof housing according to claim 1 , wherein multiple separate flow channels are provided.

8. The explosion-proof housing according to claim 1 , wherein a fan is arranged in the flow channel.

9. The explosion-proof housing according to claim 1 , wherein a separate gas channel is in flow connection with the housing interior in a flameproof manner and supplies air or gas in the housing interior or sucks air or gas out of the housing interior.

10. The explosion-proof housing according to claim 1 , wherein the at least one gas-permeable flameproof insert is provided in an upper outer wall of the plurality of outer walls.

11. The explosion-proof housing according to claim 1 , wherein the at least one gas-permeable flameproof insert is provided in at least one lateral outer wall of the plurality of outer walls.

12. The explosion-proof housing according to claim 11 , wherein at least one gas-permeable flameproof insert is provided in two opposite lateral outer walls respectively of the plurality of outer walls.

13. The explosion-proof housing according to claim 1 , wherein the flow channel is arranged inside the housing interior and the at least one guide device comprises an attachment surface for a device to be cooled.

14. The explosion-proof housing according to claim 1 , wherein the flow channel is arranged inside the housing interior and a section of the guide device is formed by a wall of a device arranged in the housing interior.

15. The explosion-proof housing according to claim 2 , wherein a length of the flow channel in the main gas flow direction is about 50% to 75% of a length of the at least one of the plurality of outer walls the at least one gas-permeable flameproof insert is provided in.

16. The explosion-proof housing according to claim 15 , wherein a cross-section of the flow channel is smaller than a sum of all outer or inner surfaces of the at least one gas-permeable flameproof insert adjoining the flow channel.

17. The explosion-proof housing according to claim 16 , wherein the flow channel comprises a channel inlet and a channel outlet arranged with distance to the channel inlet in the main gas flow direction.

18. The explosion-proof housing according to claim 17 , wherein the channel inlet and the channel outlet open in the environment and that the at least one gas-permeable flameproof insert is arranged between the channel inlet and the channel outlet in the main gas flow direction.

19. An explosion-proof housing, comprising:
a plurality of outer walls that enclose a housing interior and separate the housing interior in an explosion-proof manner from an explosive atmosphere in an environment;
at least one gas-permeable flameproof insert provided in at least one of the plurality of outer walls, the at least one gas-permeable flameproof insert having an inner side facing the housing interior and an outer side facing the environment;
at least one guide device defining a flow channel adjacent to either the inner side or the outer side of the at least one gas-permeable flameproof insert in which gas flows through the at least one gas-permeable flameproof insert; and
wherein the at least one guide device is configured to form a main gas flow having a main gas flow direction along the outer side or the inner side of the at least one gas-permeable flameproof insert in the flow channel and the flow channel is arranged inside the housing interior and the at least one guide device comprises an attachment surface for a device to be cooled.

20. An explosion-proof housing, comprising:
a plurality of outer walls that enclose a housing interior and separate the housing interior in an explosion-proof manner from an explosive atmosphere in an environment;
at least one gas-permeable flameproof insert provided in at least one of the plurality of outer walls, the at least one gas-permeable flameproof insert having an inner side facing the housing interior and an outer side facing the environment;
at least one guide device defining a flow channel adjacent to either the inner side or the outer side of the at least one gas-permeable flameproof insert in which gas flows through the at least one gas-permeable flameproof insert; and
wherein the at least one guide device is configured to form a main gas flow having a main gas flow direction along the outer side or the inner side of the at least one gas-permeable flameproof insert in the flow channel and the flow channel is arranged inside the housing interior and a section of the guide device is formed by a wall of a device arranged in the housing interior.

Assignees

• Stahl R Schaltgeraete Gmbh

Inventors

• Kondrus Elena
• Schmitt Jürgen
• Sekinger Natascha
• Walch Otto
• Kochendörfer Christian
• Limbacher Bernd

Classifications

• A62C3/16 Primary

  in electrical installations, e.g. cableways · CPC title

• E05G1/024

  Wall or panel structure · CPC title

• H05K7/20136

  Forced ventilation, e.g. by fans (H05K7/202 takes precedence) · CPC title

• H02B1/28 Primary

  dustproof, splashproof, drip-proof, waterproof or flameproof · CPC title