Explosion-proof housing with a reinforcing frame

Description

[0001] The invention relates to an explosion-proof enclosure with an interior that is enclosed in an explosion-proof manner from the surroundings of the enclosure. Potential ignition sources that could lead to the ignition of an explosive atmosphere in the surroundings can be arranged within the interior. Ignition sources can be, for example, electrical and / or electronic devices or equipment. Such devices or equipment can be safely operated within the interior of the explosion-proof enclosure. The explosion-proof enclosure prevents the ignition of the explosive atmosphere in the surroundings of the enclosure outside the interior, even if flames, hot gases, sparks, arcs, or the like occur within the interior.

[0002] US 2011 / 0303676 A1 discloses an explosion-proof enclosure with metallic enclosure walls. At least one additional reinforcement element may be provided to improve the stability of the enclosure walls. The reinforcement element may be in the form of a bracket. Several reinforcement elements may be connected to one another via threaded rods.

[0003] CN 203951114 U describes a housing which has stiffening ribs on a housing cover for reinforcement.

[0004] CN 106803647 A describes a watertight control housing. The housing body, which surrounds a housing interior, is mounted in a frame via a plurality of damping springs. This is intended to dampen shocks. Above the housing, a water tank is located in a recess in the frame to collect water and channel it laterally past the control housing via pipes. This is intended to improve the watertightness of the control housing.

[0005] CN 103648249 B relates to an explosion-proof enclosure with a housing opening enclosed by a seal 3. A glass plate 4 can thus be arranged sealingly on the housing to close the housing opening.

[0006] The fundamental problem with explosion-proof enclosures is that the enclosure structure and the associated ignition resistance of enclosure gaps and openings must remain intact even if an explosion occurs inside the enclosure and the enclosure is suddenly pressurized. The explosion-proof enclosure must be able to withstand the explosion pressure without deforming or being damaged to such an extent that the explosion-proof condition is canceled. For this reason, the enclosure walls of an explosion-proof enclosure are usually designed to be very sturdy. For example, enclosures can have a housing body made from a cast part that defines an interior space, with the housing opening in the housing body being tightly closed by a correspondingly sturdy cover, especially a steel cover. Such explosion-proof enclosures are very heavy and, due to the amount of material used, very expensive.

[0007] It can therefore be considered the object of the invention to create an explosion-proof housing that can be manufactured easily and inexpensively and at the same time offers a high degree of safety.

[0008] This object is achieved by an explosion-proof housing having the features of patent claim 1.

[0009] The explosion-proof housing according to the invention has a housing body that delimits an interior space. The housing body can have a plurality of housing walls that can be firmly connected to one another, for example by an adhesive connection or a material connection. The housing walls can be connected to one another by welding, soldering, or gluing. The housing body has a housing opening on one side. The housing opening allows access to the interior space. At least one ignition source can be arranged in the interior space, for example one or more electrical and / or electronic devices or operating equipment. By means of the explosion-proof housing, the at least one ignition source can be separated from a potentially explosive atmosphere in the surroundings of the housing outside the interior space.

[0010] The explosion-proof enclosure can be designed with a suitable type of protection. Preferably, the explosion-proof enclosure conforms to the type of protection flameproof enclosure (Ex d) according to one of the standards EN 60079-1 or IIC 60079-1.

[0011] The explosion-proof enclosure has a reinforcement frame arranged on the outside of the enclosure body. The reinforcement frame is arranged entirely outside the interior. The reinforcement frame is detachably or permanently attached to the enclosure body. The detachable connection can be formed, in particular, by a screw connection. The permanent connection can be formed, for example, by an adhesive connection or a material connection, for example, by welding, gluing, soldering, or any combination thereof. The permanent connection can additionally or alternatively also be made by mechanical means, for example, by riveting.

[0012] The reinforcing frame preferably forms a coherent structure, which can be formed from individual frame struts. The frame struts can be designed as hollow profile struts and, in particular, have a rectangular, square, or other polygonal cross-section.

[0013] The explosion-proof enclosure also includes a cover. The cover can be moved into a closed position. In the closed position, the cover rests against the enclosure body and, together with a section of the enclosure body, defines an ignition-proof gap adjacent to the enclosure opening. The ignition-proof gap is preferably designed as a flat gap and can extend along a plane. Gases can flow through the ignition-proof gap between the interior and the environment of the enclosure. The gas flow path enabled by the ignition-proof gap is dimensioned such that hot gases, sparks, flames, arcs, or the like are sufficiently cooled or extinguished before they pass from the interior into the environment.This ensures that the potentially explosive atmosphere surrounding the enclosure cannot ignite, even if an explosion occurs inside the enclosure, or sparks, flames, hot gases, or arcs occur. To achieve this, the flameproof gap can, for example, have a small gap cross-sectional area and a sufficiently large gap length perpendicular to the gap cross-sectional area.

[0014] The reinforcement frame has a ring frame section that completely surrounds the housing opening in a ring-shaped manner. Because the ring frame section of the reinforcement frame completely surrounds the housing opening in a ring-shaped manner, the housing body is very well reinforced, particularly in the area of ​​the flameproof gap. If an explosion occurs in the interior, the ring frame section prevents the housing body adjacent to the flameproof gap from undergoing undesirable deformation to such an extent that the flameproof integrity is impaired or eliminated.

[0015] Thanks to the reinforcement frame, the walls of the enclosure body can be designed with thinner wall thicknesses, which otherwise—without the reinforcement frame—would not withstand the explosion pressure. The reinforcement frame reinforces the enclosure body and thus provides sufficient strength and stability to ensure the enclosure's explosion protection even in the event of an explosion inside.

[0016] Preferably, the reinforcement frame, or at least the annular frame portion of the reinforcement frame, is not connected to the cover and / or does not abut the cover. In particular, the reinforcement frame does not serve to delimit the flameproof gap. The flameproof gap is defined between the cover and the housing body.

[0017] The explosion-proof housing preferably has at least one pressure relief device. The at least one pressure relief device forms at least one flameproof gas flow path between the interior and the environment. The at least one flameproof gas flow path is present in addition to the gas flow path through the flameproof gap. The at least one pressure relief device can be arranged in a wall of the housing body and / or in the cover.

[0018] It is also advantageous if the reinforcement frame is free of sections of the at least one flameproof gas flow path formed by the at least one pressure relief device. Therefore, the frame struts of the reinforcement frame are not penetrated by the gas flow path.

[0019] In another embodiment, the explosion-proof enclosure is free of pressure relief devices. Gas flow between the interior and the environment outside the enclosure occurs exclusively through the flameproof gap.

[0020] In a preferred embodiment, the reinforcement frame can have at least one rib frame part that is connected to the annular frame part. The rib frame part extends outside a plane defined by the annular frame part. For example, the at least one rib frame part extends along a plane that runs obliquely or at right angles to the plane along which the housing opening or the cover extends. The at least one rib frame part can rest against the housing body at one or more points. The rib frame part preferably does not protrude into the housing opening or overlaps the housing opening on the side from which the cover is arranged on the housing body, so that access to the interior is not impeded by the at least one rib frame part.

[0021] In one embodiment, each rib frame part or at least one rib frame part of the existing rib frame parts can have two legs that extend at a distance from one another and are each connected to the annular frame part. The legs can protrude at right angles or obliquely from the annular frame part. The legs of the rib frame part are connected to one another via a transverse leg of the rib frame part. The transverse leg is arranged at a distance from the annular frame part. As a result, the rib frame part can, in particular, have a U-shape, a V-shape, or a bow shape.

[0022] It is also advantageous if one of the two legs and / or the transverse leg of the at least one ribbed frame part rests against the housing body. The at least one leg and / or the transverse leg can rest directly against an adjacent housing wall of the housing body or be detachably or permanently connected to the adjacent housing wall.

[0023] It is also preferred if several rib frame parts are present, which can extend parallel to one another. The rib frame parts are arranged at right angles to their respective planes of extension and spaced apart from one another. The housing body can thus be supported by the rib frame parts at defined intervals.

[0024] In another embodiment of the explosion-proof enclosure, the reinforcement frame may be formed exclusively by the ring frame part.

[0025] The at least one rib frame part and / or the ring frame part can each be formed from a plurality of interconnected frame struts. Immediately adjacent frame struts preferably abut one another or are detachably or permanently connected to one another. In particular, immediately adjacent frame struts can abut one another with their two mutually assigned ends or can be connected to one another by means of an adhesion-promoting layer or a material-bonding connection layer, for example by gluing, welding, or soldering. Immediately adjacent frame struts can also be detachably or permanently connected to one another in any other desired manner. A permanent connection can also be produced by mechanical means, for example by riveting, in addition to or as an alternative to an adhesive connection and / or material-bonding connection.

[0026] It is also advantageous if the housing body has a housing flange. The housing flange preferably extends completely around the housing opening. The housing flange, together with an opposite edge region of the cover, defines the flameproof gap. The edge region of the cover preferably lies directly against the housing flange. The cover and the housing flange are preferably pressed against each other by suitable connecting means, for example screws or clamps, when the cover is in the closed position.

[0027] The housing flange can preferably be supported on the annular frame part, in particular directly abutting the annular frame part. The housing flange can be arranged between the annular frame part and the cover. The housing flange can abut the annular frame part in the circumferential direction around the housing opening over its entire circumferential length and / or transversely thereto over its entire width. Additionally or alternatively, the annular frame part can abut at one or more points on one or more side walls of the housing body adjoining the housing flange.

[0028] Advantageous embodiments of the invention will become apparent from the dependent claims, the description, and the drawings. Preferred embodiments of the invention are explained in detail below with reference to the accompanying drawings. The drawings show: Figure 1an embodiment of an explosion-proof housing in a perspective view with an oblique view of a cover of the explosion-proof housing, Figure 2 the design example of the explosion-proof housing from Figure 1 in another perspective view with an oblique view of the rear side of the explosion-proof enclosure opposite the cover, Figure 3 an enlarged partial view of a corner area III of the explosion-proof enclosure from Figure 2, Figure 4 a cross-sectional view through the corner area of ​​the explosion-proof enclosure Figure 3 , Figure 5 a side view of an embodiment of an explosion-proof housing, Figure 6 a schematic diagram of a pressure relief device for forming a gas flow path between an interior of the housing and an environment outside the housing, Figure 7another embodiment of an explosion-proof housing in a perspective exploded view and Figure 8 another embodiment of an explosion-proof housing in a perspective view.

[0029] In the Figures 1 , 2 , 5 , 7 and 8 are different embodiments of an explosion-proof housing 10. The explosion-proof housing 10 has a housing body 11 having one or more housing walls 12. In the exemplary embodiment, the housing body has one or more side walls 12a and a rear wall 12b. The number of side walls 12a can vary depending on the shape of the housing body 11. For example, a single annular side wall 12a can also be present. In the preferred embodiment described here, the housing body 11 has four side walls 12a and a substantially cuboid-shaped contour.

[0030] All existing side walls 12a are connected to the rear wall 12b. In the exemplary embodiments illustrated here, the housing walls 12 are permanently connected to one another. Preferably, the housing walls 12 are connected to one another by an adhesive connection or a material connection, for example, by gluing, welding, soldering, or a combination thereof.

[0031] The housing body 11 defines an interior space 13 of the explosion-proof housing, which Figure 7 can be seen. Potential ignition sources can be accommodated in the interior space 13. Such potential ignition sources can be, for example, electrical and / or electronic devices or equipment.

[0032] The interior space 13 is accessible via a housing opening 14 on one side. The housing opening 14 is located, for example, on the side of the housing body 11 opposite the rear wall 12b and is delimited by the housing body 11. A housing flange 15 is provided on the housing body 11, which completely encloses the housing opening 14 in the exemplary embodiments described and illustrated here. In the exemplary embodiment, the housing flange 15 has several sections, with each section of the housing flange 15 adjoining a respective side wall 12a of the housing body 11.

[0033] In the exemplary embodiment, each section of the housing flange 15 can be formed integrally with a respective housing wall or side wall 12a, or can be connected to the adjacent side wall 12a by an adhesive connection or a material connection. The sections of the housing flange 15 that adjoin one another in the circumferential direction around the housing opening 14 are either formed integrally or connected to one another by a material connection or adhesive connection.

[0034] If a material connection or an adhesive connection is mentioned in the present application, this connection can be made, for example, by welding and / or gluing and / or soldering.

[0035] The housing flange 15 projects outward from the housing opening 14 and not into the housing opening 14. The housing flange 15 forms a first boundary surface 16, which preferably extends along a plane.

[0036] In order to separate the interior 13 from the environment 14 in an explosion-proof or flameproof manner, the explosion-proof housing 10 also has a cover 17. In a closed position ( Figures 1 , 2 , 3 , 5 and 8 ) the cover 17 rests against the housing body 11 and, for example, against the housing flange 15 in such a way that an ignition-proof gap 18 is formed between the cover 17 and the housing body 11 ( Figures 3, 4 , 5 and 8 ).

[0037] To form the flameproof gap 18, an edge region 19 of the cover 17, on which a second boundary surface 20 is formed, is located opposite the housing flange 15. The flameproof gap 18 is delimited by the first boundary surface 16 on the housing flange 15 and the second boundary surface 20 on the edge region 19 of the cover 17. In the closed position of the cover 17, the cover 17 and the housing flange 15, and thus the first boundary surface 16 and the second boundary surface 20, are pressed against one another. The force for this can be generated by appropriate connecting means, such as screws and / or clamps or the like. The boundary surfaces 16, 20 delimiting the flameproof gap 18 are in Figure 4 illustrated.

[0038] In Figure 4It can also be seen that the first boundary surface 16 and the second boundary surface 20 extend parallel to each other in a first plane E1 when the cover 17 is in the closed position. The flameproof gap 18 is therefore also located in this first plane E1.

[0039] In order to be able to build the housing body 11 as lightly as possible with little material expenditure, the wall thickness s of the housing walls 12 or the flange 15 is small and in the embodiment significantly smaller than the thickness d of the cover 17 ( Figure 4). The wall thickness s of the housing walls 12 and the flange 15 can, for example, be at least 3 to 4 times smaller than the thickness d of the cover 17. In order to stabilize the housing body 11 so that it can withstand an explosion pressure in the interior 13 of the explosion-proof housing 10, the explosion-proof housing has a reinforcement frame 30. The reinforcement frame 30 is detachably or permanently connected to the housing body 11. For the detachable connection, the reinforcement frame 30 can be connected to the housing body 11 by a screw connection or another positive and / or non-positive connection. Preferably, the reinforcement frame 30 is permanently connected to the housing body 11, for example by a material connection and / or an adhesive connection, such as by welding and / or soldering and / or gluing.Additionally or alternatively, the reinforcement frame 30 can also be connected to the housing body 11 by a rivet connection.

[0040] The reinforcement frame 30 has an annular frame part 31 extending adjacent to the flameproof gap 18 completely around the housing opening 14. In the simplest case, the reinforcement frame 30 can be formed by the annular frame part 31 ( Figure 8 ).

[0041] The reinforcement frame 30 is arranged outside the interior space 13 and is connected externally to the housing body 11. In the exemplary embodiment, there is no direct contact and / or connection between the reinforcement frame 30 and the cover 17. The flange 15 is arranged between the annular frame part 31 of the reinforcement frame 30 and the cover 17 and therefore separates the annular frame part 31 from the cover 17, so that there is no direct connection or direct contact. However, it is possible for the reinforcement frame 30 to be designed to cooperate with a connecting means in order to fasten the cover 17 to the housing body 11 in its closed position. For example, engagement surfaces for clamps or ferrules can be provided on the reinforcement frame 30 or the annular frame part 31. Additionally or alternatively, the reinforcement frame 30 orThe ring frame part 31 must have threaded receptacles for threaded bolts by means of which the cover 17 is held in its closed position.

[0042] In the drawing, for example in the Figures 3 and 4 , it can also be seen that the ring frame part 31 supports the housing flange 15 along its entire circumferential length in the circumferential direction around the housing opening 14. The ring frame part 31 can support the housing flange 15 transversely to the circumferential direction along its entire width ( Figures 3 and 4 ) or only along a section. The annular frame part 31 preferably rests at least at one or more points or along its entire extent against the side walls 12a of the housing body 11 adjoining the housing flange 15.

[0043] The ring frame part 31 or the reinforcement frame 30 is formed, for example, by several frame struts 32, which are preferably each designed as hollow profile struts ( Figure 4). The frame struts 32 preferably have a polygonal cross-sectional contour, which in the exemplary embodiment can be square or rectangular. The frame struts 32 have a frame wall thickness r that is greater than the wall thickness s of the housing walls 12 or the housing flange 15. The frame wall thickness r can be smaller than the thickness d of the cover 17 or approximately the same as the thickness d of the cover 17.

[0044] To form the annular frame part 31, several frame struts 32, and, for example, four frame struts 32, are connected to one another. Two immediately adjacent frame struts are connected to one another at their mutually assigned ends, e.g., by a material connection and / or an adhesive connection. The annular frame part 31 has a rectangular shape in the exemplary embodiment. In the case of cylindrical housing parts 11, the annular frame part 31 can also have a circular shape and be formed by at least one frame strut 32 forming a closed circular ring.

[0045] In the embodiments according to the Figures 1-7 the reinforcement frame 30 has, in addition to the ring frame part 31, at least one rib frame part 36. In the embodiments according to the Figures 1 , 2 and 5 There are four rib frame parts 36. In the embodiment of the Figure 7There are six rib frame parts 36. The number of rib frame parts 36 can vary depending on the size of the housing body 11.

[0046] Each rib frame part 36 has two legs 37, which are spaced apart from one another and can, for example, be arranged parallel to one another. Each of the two legs 37 is connected to the ring frame part 31, for example by an adhesive connection and / or a material connection. The two legs 37 are arranged on opposite sides of the housing opening 14 or the housing body 11, respectively.

[0047] At a distance from the annular frame part 31 and, for example, at the ends opposite the annular frame part 31, the two legs 37 of a common ribbed frame part 36 are connected to each other by means of a transverse leg 38. The transverse leg 38 can be connected to the legs 37, for example, by a material connection and / or an adhesive connection.

[0048] Thus, in the exemplary embodiment, the at least one ribbed frame part 36 has a bow-shaped configuration. Unlike in the preferred exemplary embodiment, the two legs 37 do not necessarily have to be aligned parallel to each other. Preferably, the legs 37 extend along and parallel to the immediately adjacent side wall 12a of the housing body 11 and are adapted in their extension to the shape of the side wall 12a.

[0049] In the Figures 1 , 2 and 5In the illustrated embodiment, the rib frame parts 36 are connected to one another exclusively via the common annular frame part 31 of the reinforcement frame 30. Additional frame struts 32, which run between the rib frame parts 36 and do not belong to the annular frame part 31, can be omitted.

[0050] The rib frame parts 36 each extend in a second plane E2, wherein each second plane E2 in the embodiment is aligned at right angles to the first plane E1 (compare e.g. Figure 5 ). The rib frame parts 36 are arranged at a distance from one another at right angles to the second planes E2. The distances between two immediately adjacent rib frame parts 36 can each be the same size ( Figures 1 , 2 and 5). The distances between two immediately adjacent rib frame parts 36 at right angles to the respective extension plane (second plane E2) can also be of different sizes, as shown in Figure 7 is shown.

[0051] In the Figure 7In the illustrated embodiment, the rib frame parts 36 are connected to one another by additional frame connections 39 of the reinforcement frame 30, independently of the annular frame part 31. For example, two frame connections 39, each formed by at least one frame strut 32, are provided, which extend parallel to the first plane 1 or parallel to the annular frame part 31 and connect the rib frame parts 36 to one another in the corner regions between a leg 37 and the transverse leg 38. In the illustrated embodiment, two frame connections 39 extending parallel to one another are provided, to which the transverse legs 38 and the legs 37 are fastened, for example, by a material connection and / or an adhesive connection. In the illustrated embodiment, the frame connections 39 extend at right angles to the legs 37 and the transverse legs 38 of the rib frame parts 36.

[0052] In the preferred embodiments illustrated here, all frame struts 32 extend in an x-direction, a y-direction, or a z-direction of a Cartesian coordinate system. Alternatively, the reinforcement frame 30 could also have at least one frame strut 32 extending obliquely to the x-direction and / or obliquely to the y-direction and / or obliquely to the z-direction of the Cartesian coordinate system.

[0053] An exchange of gases can take place between the interior space 13 and the environment U. It cannot therefore be ruled out that explosive gases will enter the interior space 13 and be caused to explode by an ignition source arranged in the interior space 13. The flameproof gap 18 is designed and dimensioned in such a way that hot gases, arcs, flames, sparks or other ignitable media are sufficiently cooled or extinguished before they pass from the interior space 13 into the environment U. This ensures that ignition of the potentially explosive atmosphere in the environment U around the explosion-proof enclosure 10 is avoided. The reinforcing frame 30 ensures that the enclosure body 11 is not deformed by the explosion pressure in such a way that the flameproof gap 18's flameproof integrity is compromised.This is ensured in particular by the annular frame part 31, which is arranged directly adjacent to the housing opening 14. The housing flange 15 rests on the annular frame part 31. This prevents impairment of the flameproof gap 18 in the event of an explosion in the interior 13. The annular frame part 31 can be reinforced by one or more ribbed frame parts 36 to prevent deformation of the annular frame part 31 in the event of an explosion in the interior 13.

[0054] In the preferred embodiments described so far, a gas flow connection between the interior 13 and the environment U exists exclusively by means of the flameproof gap 18. In a modification of this, the explosion-proof housing 10 can optionally have at least one pressure relief device 43, which is shown schematically in Figure 6is illustrated. By means of the at least one pressure relief device 43, at least one additional flame-proof gas flow path P can be provided between the interior space 13 and the environment U. For example, the pressure relief device 43 can be formed by an insert that is arranged in the cover 17 or a housing wall 12 of the housing body 11. To ensure the flame-proof nature of the gas flow path P, the pressure relief device 43 can, for example, have a gas-permeable porous body 44. Other designs of pressure relief devices 43 can also be used, as are known per se for explosion-proof housings. The explosion pressure in the interior space 13 can be additionally limited by the at least one pressure relief device 43.

[0055] The at least one gas flow path P of the at least one pressure relief device 43 does not run through a frame strut 32 of the reinforcing frame 30, but rather in regions between frame struts 32 of the reinforcing frame 30. Thus, all parts of the reinforcing frame 30 are free of sections of the at least one flameproof gas flow path P.

[0056] In the embodiments described here, the explosion-proof housing 10 is designed with the flameproof enclosure (Ex d) type of protection. Alternatively, the explosion-proof housing 10 could also be designed with other standardized types of protection.

[0057] The invention relates to an explosion-proof housing 10 with a housing body 11 that defines an interior space 13 and has a housing opening 14. The housing opening 14 can be closed by means of a cover 17. In the closed position of the cover 17, an ignition-proof gap 18 is formed between the housing body 11 and, in particular, a housing flange 15 of the housing body 11 and the cover 17. The housing body 11 has a plurality of housing walls 12 that have such a small wall thickness s that the housing walls 12 would not withstand an explosion pressure in the interior space 13. The housing body 11 is therefore reinforced by a reinforcing frame 30 arranged outside the interior space 13. The reinforcing frame 30 has an annular frame part 31 that is arranged adjacent to the housing opening 14 and completely encloses the housing body 11 in a ring shape. In particular, the ring frame part 31 is directly connected to the housing flange 15. List of reference symbols:

[0058] 10 explosion-proof enclosure 11 enclosure body 12 enclosure wall 12a side wall 12b rear wall 13 interior 14 enclosure opening 15 enclosure flange 16 first boundary surface 17 cover 18 flame-proof gap 19 edge area 20 second boundary surface 30Reinforcement frame 31Ring frame part 32Frame strut 36Rib frame part 37Legs 38Cross legs 39Frame connection 43Pressure relief device 44Porous body dCover thickness PGas flow path rFrame wall thickness sWall thickness UAmbient

Claims

1. Explosion-proof housing (10) having a housing body (11) that delimits an interior (13) and that comprises a housing opening (14) through which the interior (13) is accessible, having a separate reinforcing frame (30) that is releasably or non-releasably arranged on the outside of housing body (11) and comprises a ring frame part (31) that completely surrounds the housing body (11) in a ring-shaped manner adjacent to housing opening (14), having a cover (17) that abuts against the housing body (11) in a closing position, such that a flameproof gap (18) is formed between cover (17) and housing body (11).

2. Explosion-proof housing according to claim 1, characterized in that at least one pressure relief device (43) is provided that forms at least one flameproof gas flow path (P) between the interior (13) and an environment (U) outside of housing (10).

3. Explosion-proof housing according to claim 2, characterized in that the reinforcing frame (30) is free of sections of the at least one flameproof gas flow path (P).

4. Explosion-proof housing according to claim 1, characterized in that a gas flow connection between the interior (13) and an environment (U) outside of housing (10) is exclusively provided by the flameproof gap (18).

5. Explosion-proof housing according to any of the preceding claims, characterized in that the reinforcing frame (30) comprises at least one rib frame part (36) that is connected with the ring frame part (31) and that extends outside of a plane defined by ring frame part (31).

6. Explosion-proof housing according to claim 5, characterized in that at least one rib frame part (36) of the at least one rib frame part (36) comprises two legs (37) that extend with distance to one another and that are respectively connected with the ring frame part (31), and that the rib frame part (36) comprises a transverse leg (38) that extends with distance to the ring frame part (31) and that connects the two legs (37) with each other.

7. Explosion-proof housing according to claim 6, characterized in that at least one of the two legs (37) and / or the transverse leg (38) of the at least one rib frame part (36) abuts against the housing body (11).

8. Explosion-proof housing according to any of the claims 5-7, characterized in that multiple rib frame parts (36) are present that extend parallel to each other and that are arranged with distance to each other.

9. Explosion-proof housing according to any of the preceding claims, characterized in that the at least one rib frame part (36) is made respectively from multiple frame struts (32) connected with each other.

10. Explosion-proof housing according to any of the preceding claims, characterized in that the ring frame part (31) is respectively made from multiple frame struts (32) connected with each other.

11. Explosion-proof housing according to claim 9 or 10, characterized in that the respective directly adjacent frame struts (32) abut each other with their ends.

12. Explosion-proof housing according to any of the claims 9-11, characterized in that the respective directly adjacent frame struts (32) are non-releasably connected with each other.

13. Explosion-proof housing according to any of the preceding claims, characterized in that the housing body (11) comprising a housing flange (15) and that the flameproof gap (18) is formed between the cover (17) and the housing flange (15).

14. Explosion-proof housing according to claim 13, characterized in that the housing flange (15) extends completely around the housing opening (14).

15. Explosion-proof housing according to claim 13 or 14, characterized in that the housing flange (15) is supported on the ring frame part (31).