Explosion-proof housing

Abstract

The invention relates to an explosion-proof housing (10) which forms an inner space (14) for accommodating components (16) which can form ignition sources. The explosion-proof housing has a first housing part (11) with a first section (13) having a first face (33) and a second housing part (18) with a second section (20) having a second face (34), wherein the first section (13) and / or the second section (20) are wall sections, wherein the first face (33) and the second face (34) define an intermediate region (32). The first section (13) and the second section (20) press against one another upon elastic deformation of the wall sections (13, 20), whereby the intermediate region (32) is closed in terms of geometry by the elastic deformation of the wall sections (13, 20) in a manner which is explosion-proof. Furthermore, a method (200) for establishing an explosion-proof connection between a first section (13) of a first housing part (11) of a housing (10) having a first face (33) and a second section (20) of a second housing part (18) having a second face (34) is described, wherein at least one of the sections is a wall section (13, 20). A further method (200) for establishing an explosion-proof connection between a first section (13) of a first housing part (11) of a housing (10) having a first face (33) and a second section (20) of a second housing part (18) having a second face (34) is described, wherein at least one of the sections is a wall section (13, 20).

Description

TECHNICAL FIELD

[0001] The present application relates to an explosion-proof housing, preferably of the "pressure-encapsulated" protection type. BACKGROUND

[0002] From the prior art, a housing is known which is constructed according to the explosion-proof type "pressure-encapsulated". This explosion-proof type allows an explosive gas mixture to accumulate within the housing and to explode by means of an ignition spark formed by an electrical operating device within the housing. According to the protection type, it is also allowed that gases or particles can be forced outwards from the interior of the housing through a gap upon explosion, where an explosive atmosphere can be present. However, according to the explosion-proof type, it must be excluded that the gases are so hot or the particles are so hot or incandescent that an explosive atmosphere can be ignited outside the housing.

[0003] DE 10 2010 016 782 Al describes a pressure relief device for a housing of the pressure-encapsulated type. It is provided to be arranged in a housing part and to reduce the size of a pressure peak generated during an explosive reaction in the interior space in such a way that the generated gases can quickly and easily flow out of the housing through the pressure relief device.

[0004] From DE 34 36 300 C2, a device housing with an explosion-proof chamber is known. The housing has a jacket as a first housing part and a cover as a second housing part. The jacket and the cover have corresponding flanges in order to establish a flange connection between the jacket and the flange. Between the flanges, a gap is allowed through which gases or particles can be forced outwards from the interior of the housing upon explosion. However, the size of these gaps is set in such a way that a gas ignited in the cavity of the housing cools down sufficiently before leaving the housing through the gap between the flanges. Sealing means can be arranged between the flanges in order to prevent the ingress of moisture into the housing.

[0005] In order to safely comply with the gap size for the gap of the explosion protection, the opposing flange faces in the housings known from the prior art are manufactured with a tight manufacturing tolerance. In order to close the housing, the flanges are arranged against one another in the case of the gap of the explosion protection and the gap of the explosion protection between the flanges is ensured in such a way that the flanges are pressed against one another.

[0006] A housing which is called pressure-resistant is known from DE 26 17 965 B2. The housing has a housing lower part and a housing upper part. The two parts form a spacing which is called gap space. A sealing device is arranged between the housing upper part and the housing lower part at the gap space. This sealing device together with a spring element serves to hold the housing lower part together with the housing upper part. The spring element is arranged in the spacing. The spacing is cast with casting resin. It is claimed that by casting the gap with casting resin a pressure-resistant housing can be obtained which is constructed without a gap.

[0007] DE 10 2007 003 009 A1 describes a method for producing a fluid-tight housing and a fluid-tight housing. The housing has a base part and a plate-like cover structure and a sealing device arranged between the wing surfaces of the base part and the cover structure facing each other for fluid-tight sealing of the interior space of the housing. The base part and the cover structure are fixed in a pre-tensioned manner to each other, whereby the elastic sealing device is deformed. It is thus excluded that gases from the surroundings of the housing reach an ignition source in the fluid-tight housing.

[0008] A protection against explosion for an electrical and / or electronic structural element is known from DE 10 2013 111 374 A1. The device has a carrier and a cover body. The cover body defines at least one accommodation chamber for the structural element. An elastic coupling element is arranged between the cover body and the carrier, which completely surrounds an opening in the cover body. When the cover body and the carrier are connected by means of a force- and / or form-fit connection, the coupling element is here elastically deformed between the cover body and the carrier. With the protection against explosion it should be possible to achieve the requirements defined for a potted package (Ex-m) or a pressure-resistant package (Ex-d). In the case of a potted package (Ex-m) an explosive atmosphere is discharged from the interior space of the housing.

[0009] DE 1 801 062 A discloses a pressure-resistant housing made of steel sheet parts which are connected by welding. The housing has a ring which is embedded with a welded connection into an opening in a wall of the housing. The ring has a conical mating surface as a seat for a cover. The cover can be held at the housing by a snap-in locking mechanism. The cooperation between the ring and the cover makes it necessary to observe close tolerances, which increases the costs of production.

[0010] GB 778 040 discloses a housing with a first part which defines an interior space of the housing and which has an opening which, when the housing is open, allows access to the interior space, and a second part for closing the opening. Between the first part and the second part there is arranged an elastically deformable, perforated element which closes the gap between the first part and the second part in an explosion-proof manner. When the housing is reclosable without replacement of the element, it must be noted that the element is not damaged in the open state. SUMMARY

[0011] It can be considered a task to specify a better design for an explosion-proof housing.

[0012] The task is solved with an explosion-proof housing according to the invention, a method according to the invention and a further method according to the invention:

[0013] The explosion-proof housing forms an interior space for accommodating components which can form ignition sources. The housing has a first housing part with a first section having a first face and a second housing part with a second section having a second face. The first section and / or the second section is a wall section. A section which is a wall of the first section or the second section can be a side wall, a bottom or a back or a cover or other closing structure, for example a front closing structure or a back closing structure. The first face and the second face define an intermediate region which is a separation site of the housing. The first section and the second section are pressed against each other directly and / or indirectly via at least one intermediate layer under elastic deformation of the wall section, so that the intermediate region is closed in a geometric manner by the elastic deformation of the wall section in an explosion-proof manner.

[0014] According to the invention, a method for manufacturing a housing, for example a housing according to the invention as specified herein, is specified. The method has that the first section and the second section are selected so as to define an intermediate section of the housing, wherein at least one of the sections is a wall section, i.e. the first section and the second section can be pressed against each other under elastic deformation of the wall section, so that the intermediate region is closed in a geometric manner by the elastic deformation of the wall section in an explosion-proof manner.

[0015] A further method according to the invention serves to establish an explosion-proof connection between a first section of a first housing part with a first face and a second section of a second housing part with a second face. This method can be used, for example, at a housing according to the invention as specified herein. The method has that the first housing part and the second housing part are assembled together in order to close the housing, wherein the first face and the second face define an intermediate region which has a gap size outside the explosion-proof region. The sections are force-loaded, so that the intermediate region is closed in a geometric manner in an explosion-proof manner by the elastic deformation of the wall section.

[0016] In an embodiment, the intermediate region can be closed to a width of zero, i.e. can be a zero-gap of the explosion protection, or an explosion-protected gap with a gap width of zero is formed in the intermediate region.

[0017] In the prior art, in order to establish an explosion-protected connection between two elements of a housing, between which an explosion-protected gap is formed, the housing parts are shaped, in particular finished, such that they match one another in order to form an explosion-protected gap between the housing parts. According to the application, the gap is formed safely when at least one wall section is elastically deformed when the first section and the second section are pressed against one another, the gap following the maximum length and width for explosion protection safety. The pressing of the second housing part onto the first housing part thus does not serve, as in the prior art, to safeguard the explosion-protected gap already generated at the two-face contact of the housing parts, but rather ensures that the explosion-protected gap dimension is formed from the deformation of the first section and / or the second section during the connection of the second housing part to the first housing part.

[0018] The deformation of the first section and / or the second section preferably results in a deformation of the face of the first section and / or the face of the second section and / or a reduction of the angle determined by the face defining the width of the intermediate region and thus a reduction of the width of the intermediate region, whereby the intermediate region is closed in an explosion-protected manner. The first section and the second section can form a wedge-shaped gap, wherein the gap can have a wedge shape as a nominal shape as a result of the nominal shape of the first section and the second section, or wherein the gap can have a wedge shape as a result of a predetermined shape of the first section and the second section which differs from the nominal shape. The wedge-shaped gap is further closed by the elastic deformation, wherein the wedge-shaped gap can maintain or lose its wedge shape.

[0019] The design according to the application places lower requirements on the tolerances of the housing parts defining the separation site. The design according to the application also makes it possible for the intermediate region to deviate from the flat gap shape, for example an arched gap, for example a U-shaped gap in cross section, or for example a V-shaped or W-shaped gap.

[0020] According to the application, the deformation of the first housing part and / or the second housing part can be used purposefully to balance the coarse tolerances of the first housing part / second housing part or to deviate purposefully from the shape by the deformation. The deformation is used as a means for establishing explosion protection safety.

[0021] The explosion-protected housing can be constructed, for example, according to the protection type "pressure-resistant encapsulation" according to the standard DIN EN 600-79 / 1 or the American standard, for example.

[0022] Further advantageous, alternative features and embodiments of the housing according to the application and of the method according to the application result, for example, from the following explanations:

[0023] In an embodiment of the housing, the first section of the first housing part and / or the second section of the second housing part is a sheet section. When the first housing part and / or the second housing part is a sheet, the housing can be produced with a particularly low weight. The first housing part and / or the second housing part can be a deep-drawn sheet. The sheet thickness of the first section and / or the sheet thickness of the second section can be, for example, 5 mm or less, for example 3 mm or less, in an embodiment. The smaller the sheet thickness, the smaller the force required for the explosion-proof closure by deformation.

[0024] In a preferred embodiment of the explosion-proof housing, the first section and the second section press against one another both under elastic deformation of the second section and under elastic deformation of the first section in order to close the intermediate region between the first section and the second section explosion-proof. In this embodiment, the deformation of the second section and the deformation of the first section towards one another decisively contribute to the explosion-proof closure of the intermediate region. The elastic deformability of the first section of the first housing part and the elastic deformability of the second section of the second housing are preferably so great that the first section and the second section travel some distance from one another when deformed for the explosion-proof closure of the intermediate region, the length of these distances differing by a factor of at most 10.

[0025] The first housing part and the second housing part can have a predetermined shape, whereby these housing parts, even when the second housing part is directly applied to the first housing part, at least in the state of non-explosion-proof pressing against one another, define an intermediate region with a width other than zero, which intermediate region is intended for the explosion-proof closure by clamping.

[0026] The first section and the second section can have a predetermined shape that deviates from one another. The predetermined shape is a shape that has a shape and / or a size within a predetermined tolerance range around a specified shape (nominal shape).

[0027] The first section and the second section do not have a shape that matches one another at least without elastic deformation, i.e., the explosion-proof intermediate region geometry already exists without deformation and is not a mating surface in this regard. The first section and the second section have a nominal shape or a predetermined shape that strongly deviates from one another at least without elastic deformation (their edge faces).

[0028] The first section and the second section can have different nominal shapes, whereby in the state of non-clamping of the first section and the second section when the first housing part is applied to the second housing part, the first section and the second section enclose an angle due to the geometric nominal shape.

[0029] The width of the intermediate region can increase from the support region in the direction of the surroundings of the housing and / or in the direction of the interior space at least in the non-flameproofly pressed state against one another due to the intended shape of the first and second segments.

[0030] In the flameproof closure of the intermediate region by elastic deformation, the segments are preferably supported directly or indirectly at the abutment segments in a fixed support region, wherein the support region forms the inner edge and / or the outer edge of the intermediate region and / or wherein the support region is arranged between the inner edge and the outer edge of the intermediate region.

[0031] The first segment and / or the second segment can form the arm of a curved spring and / or a one-sided lever, which moves relatively towards one another upon elastic deformation for the flameproof closure away from the support region.

[0032] Upon deformation, the segments decrease (for example to zero) the angle enclosed before deformation due to the intended shape deviating and / or the intended shape predetermined deviating. The first segment and / or the second segment match one another by deformation. "Matching" refers to a process of the segments towards a complementary shape, without necessarily reaching the complementary shape. This process does not necessarily need to result in the complementary shape for the flameproof closure. Rather, the intermediate region geometry can also enter the range of the geometry of the flameproof gap by deformation without reaching the complementary shape, wherein the intermediate region can be empty or filled after deformation. The first segment and the second segment can obtain the complementary shape by deformation. In other embodiments, an angle existing between the surfaces of the first segment and the second segment before deformation is at least reduced due to the deformation.

[0033] The first segment and / or the second segment can form an elongated accommodation, for example a hem. The accommodation can be U-shaped, V-shaped or W-shaped in the cross section of the first segment and / or the second segment, for example. The second segment and / or the first segment has an elongated arching structure accommodated in the accommodation. In embodiments, the opposing faces of the arching structure and the accommodation have shapes deviating from one another in the non-flameproofly pressed state against one another, for example V-shaped with different opening angles or U-shaped with different curvatures. Upon clamping of the first segment and the second segment to establish the flameproof safety, the first segment and / or the second segment and thus the faces can be deformed in embodiments such that the previously non-complementary shapes lie flat against one another. Upon deformation of the first segment and / or the second segment, the surface of the sheet element can lie flat against the surface of the further element. The flameproof intermediate region can form a gap with a gap width of 0. The intermediate region can be in particular a gap with a gap width of 0.

[0034] The intermediate region can be free of solid filler in the clamped state or filled with an elastically deformable solid. In an embodiment, at least one elastically deformable intermediate layer can be arranged between the first section and the second section, the first section and the second section being pressed against one another by means of the intermediate layer. An elastically deformable intermediate element can be arranged between the first section and the second section. The first section and the second section can be pressed against one another via the intermediate element. The intermediate layer and / or the intermediate element can be separate from the first section and / or the second section or connected, for example bonded, to the first section or the second section in material engagement. The intermediate element can be, for example, frame-shaped in order to surround the opening of the housing. The intermediate element can be made of plastic.

[0035] The intermediate region can enclose an angle with the dimension direction, for example the length direction, the width direction, the height direction, that is to say the direction along which the dimension of the housing is measured, which is different from 0°. In known housings with a flat gap with explosion protection, the flat gap is configured, for example, parallel to the width direction of the housing or the length direction of the housing or the height direction of the housing. When the intermediate region, in particular in the case of a gap-like intermediate region, encloses an angle with the dimension direction, the housing can have a smaller dimension in this direction than when the intermediate region is oriented, for example, parallel to the dimension direction. This makes it possible to produce particularly compact housings or housings with an optimally large internal volume.

[0036] In a preferred embodiment, the intermediate region and / or the first face and the second face delimiting the intermediate region are obliquely oriented with respect to the wall of the housing. The intermediate region and / or the first section and / or the second section can enclose an angle with the wall of the housing which deviates from 90°, which is greater than 0° and less than 180°. The intermediate region, the first section and / or the second section can in particular obliquely project from the wall of the housing, more precisely outwards or inwards.

[0037] The first section and / or the second section can be, for example, a section which projects outwards from the wall of the housing, that is to say in the direction of the surroundings of the housing, or inwards, that is to say in the direction of the interior space of the housing.

[0038] In a preferred embodiment, the first section and / or the docking section has a means for determining a bending zone. The bending zone can be determined, for example, by providing a region in the sheet material in which the wall thickness is reduced compared to the rest of the first section. The region can be linear. In particular, the region can follow a straight line. The means can be, for example, a groove-shaped recess in the section or the docking section. The bending zone can follow a straight line. The higher flexibility in the bending zone can be determined in addition to or as an alternative to the smaller wall thickness, for example, by a change in structure in the region of the sheet material. In particular when there is a means for determining a bending zone in the section and / or the docking section, the shape change on clamping can be predetermined particularly precisely. The material of the section and / or the docking section, in particular the sheet material, can be configured more specifically with such a means to be strong enough on the one hand to be able to withstand an explosion and on the other hand to be flexible enough to keep the force expenditure for deforming to form the explosion-protected intermediate region small.

[0039] In a preferred embodiment, the housing is reclosable. Preferably, the first section and the second section are repeatedly pressed against one another on elastic deformation of the one or more wall sections in order to reclose the intermediate region between the first section and the second section explosion-protected.

[0040] A particularly thin sheet thickness can be achieved when the housing is equipped with an internal and / or external pressure relief device. The pressure relief device that is preferably provided for the housing is preferably designed and specified for limiting the maximum overpressure that occurs in the interior of the housing as a result of an explosion to a maximum value that is less than the maximum value that occurs in the same housing without the at least one pressure relief device.

[0041] The at least one device for reducing the explosion pressure can have a pressure relief body that is arranged in or at an opening of the housing to the surroundings of the housing in order to relieve the gas from the interior of the housing to the surroundings in the event of an explosion (external pressure relief device). Such a pressure relief body is preferably designed explosion-protected according to the protection type "pressure- tight encapsulation" (for example Ex-d, EN 60079-1).

[0042] The at least one device for reducing the explosion pressure can alternatively or additionally have a means that can let the gas escape from the housing, but which can also absorb thermal and / or kinetic energy from the explosion in order to limit the maximum overpressure as a result of the explosion (internal pressure relief device).

[0043] The pressure relief device for reducing the explosion pressure preferably has an open-pored material. The open-pored material can effectively cool the gas due to its large surface in order to reduce the maximum explosion pressure. The open-pored material can be, for example, a fibrous material, for example a metal fibrous material, for example fibers which are processed into a braid, a gelege or a felt, or a bulk formed from loose material.

[0044] The pressure relief device can be provided and specified, for example, for limiting the differential pressure due to the explosion to a maximum of 1000 mbar or less, or particularly preferably to a maximum of 500 mbar or less. The at least one pressure relief device for reducing the explosion pressure is preferably provided and specified for reducing the explosion pressure of several bar, in particular greater than or equal to 10 bar, which occurs when the at least one device is not provided in an otherwise unaltered housing, to an overpressure of, for example, less than or equal to 1 bar above atmospheric pressure.

[0045] In embodiments, the inner volume of the housing can be 1 liter or more, 10 liters or more, 50 liters or more, 100 liters or more, 500 liters or more, or 1000 liters or more. BRIEF DESCRIPTION OF DRAWINGS

[0046] Further optional advantageous features and embodiments result from the dependent claims, the following description and the drawings.

[0047] Figure 1a One example of a housing according to the application is shown, for example, in a perspective view;

[0048] Figure 1b A first housing part of a housing according to the application is shown, for example, in a perspective view; Figure 1a

[0049] Figure 1c A second housing part of a housing according to the application is shown, for example, in a perspective view; Figure 1a

[0050] Figure 2 A cross-sectional view of a first section and a second section of a housing according to the application (section along the cut line S1) is shown, for example, in a perspective view; Figure 1a

[0051] Figure 3 A cross-sectional view of a first section and a second section of a housing according to the application in a clamped state is shown, for example, in a perspective view; Figure 1a

[0052] Figure 4 One part of a housing according to the application (along the cut lines S1 and S2, perpendicular to the second housing part) is shown, for example, in a schematic perspective view not true to scale; Figure 1a ​​​​​

[0053] Figure 5 for example a cross-sectional view along a section along the cutting line S1 of a housing according to the application in an unclamped state Figure 1a

[0054] Figure 6a for example a cross-sectional view along a section along the cutting lines S1 and S2 of a housing according to the application Figure 1a

[0055] Figure 6b for example a cross-sectional view along a section along the cutting line S1 of a housing according to the application in an unclamped state Figure 6a

[0056] Figure 6c for example a cross-sectional view along a section along the cutting line S1 of a housing according to the application in an unclamped state Figure 6b

[0057] Figure 7 for example a cross-sectional view along a section along the cutting line S1 of a housing according to the application in an unclamped state Figure 6a

[0058] Figure 8a for example a cross-sectional view along a section along the cutting line S1 of a housing according to the application in an unclamped state 8b Figure 8a Figure 8b Figure 6a for example a cross-sectional view along a section along the cutting line S1 of a housing according to the application in an unclamped state

[0059] Figure 9a for example a cross-sectional view along a section along the cutting line S1 of a housing according to the application in an unclamped state

[0060] Figure 9b for example a cross-sectional view along a section along the cutting line S1 of a housing according to the application in an unclamped state Figure 9b

[0061] Figure 9c for example a cross-sectional view along a section along the cutting line S1 of a housing according to the application in an unclamped state Figure 9a

[0062] Figure 10a for example a cross-sectional view along a section along the cutting line S1 of a housing according to the application in an unclamped state

[0063] Figure 10b for example a cross-sectional view along a section along the cutting line S1 of a housing according to the application in an unclamped state ​​​​​​​​​​

[0064] Figure 10c for example a variant of an embodiment according to the application is shown; Figure 10a and 10b a diagram showing one face of a first section of a first housing part of a housing according to the application;

[0065] Figure 11a , 11b for example a variant of an embodiment according to the application is shown; Figure 10b a diagram showing one face of a first section of a first housing part of a housing according to the application;

[0066] Figure 12a for example an illustration of an embodiment of a method according to the application is shown; and

[0067] Figure 12b for example an illustration of another embodiment of a method according to the application is shown. DETAILED DESCRIPTION

[0068] Figures 1a to 1c An embodiment of an explosion-proof housing 10 according to an embodiment according to the teachings of the application is shown. The housing 10 has a basin-shaped or container-shaped, for example cuboid or cylindrical, first housing part 11 with a wall 12. The wall 12 has a first wall section (first section 13). The housing part 11 encloses an interior space 14 of the housing 10 in circumferential direction in order to separate the interior space 14 from a surrounding 15 of the housing 10. The interior space 14 can be specified for this purpose to have electrical or electronic components 16 which can form ignition sources arranged therein. The first housing part 11 defines an opening 17. The opening 17 is closed with a lid-shaped second housing part 18 which forms a wall of the housing 10 and thus a second wall section (second section 20). The second housing part 18 can form, depending on the application of the housing 10, for example a rear wall, a front wall, a side wall or a lid of the housing 10.

[0069] The first housing part 11 can be made of sheet material. The material of the first housing part 11 is preferably free of explosion-proof open pores or gaps which connect the interior space 14 of the housing 10 with the surrounding 15. However, an external pressure relief device 21 with an opening 22 can be arranged at the first housing part 11 and / or an internal pressure relief device 23 can be arranged in the housing 10.

[0070] The internal pressure relief device 23 can be designed as Figure 1bThe internal pressure relief device 23 is arranged in the interior space 15, in particular at one or several wall sides of the first housing part 11, as is known per se. The internal pressure relief device 23 has a porous material 24. This can be, for example, a bulk of loose granular material and / or a body with openings, for example a plastic or metal foam, a body of random fibers, a body composed of one or several grid layers, wherein each grid layer can be woven, tiled or otherwise produced. The internal pressure relief device 23 serves to absorb heat or kinetic energy from the explosion gases in the event of an explosion in order thus to reduce the peak pressure that would occur in the housing 10 without the internal pressure relief device 23. The internal pressure relief device 23 is outstanding in that it is able to reduce the peak pressure without the gas having to be discharged from the interior space 15 of the housing 10.

[0071] At the wall of the first housing part 11 having the pressure relief opening 21a, a pressure relief body 21b can be arranged, which pressure relief body explosion-proof closes the opening 21a. The opening 21a and the pressure relief body 21b form an external pressure relief device. The external pressure relief device 22 has a pressure relief body 22 with open pores, which in principle allow a gas exchange between the interior space 14 of the housing 10 and the surroundings 15 of the housing 10, but wherein the pores form gaps with a maximum gap width and a minimum gap length, so that hot gases and / or particles from the interior space 15 of the housing 10 can only exit the pressure relief body 22 to the surroundings 15 of the housing 10 cooled in such a way that this combustible atmosphere cannot be ignited in the surroundings 15 of the housing 10. The pressure relief body 22 is connected to the wall 12, for example by casting, gluing, soldering, welding, clamping or the like in such a way that hot gases and / or particles cannot bypass the pressure relief body, at least not without cooling to such an extent that the hot gases and / or particles cannot ignite this explosive atmosphere in the surroundings 15 of the housing 10.

[0072] The internal pressure relief device 23 and the external pressure relief device 22 can be arranged at the side of the housing 10, so that the gas first flows through the internal pressure relief device 23 in order then to flow through the external pressure relief device 22 into the surroundings 15 of the housing 10.

[0073] The internal pressure relief device 23 and / or the external pressure relief device 22 are preferably responsible for reducing the peak pressure for the explosion case of the housing 10 to a overpressure of less than or equal to 1000 mbar, or preferably less than or equal to 500 mbar.

[0074] The wall 12 of the first housing part 11, which planarly delimits the interior space 14 of the housing 10 from above, from below and / or from the side, has a section 13 projecting laterally, for example vertically, outwardly (as shown) and / or (partly) inwardly as a first section 13, which forms a flange section. The flange section 13 encloses the opening 17. The flange section 13 can be closed in circumferential direction. The flange section 13 has a crimp 25. The bottom 26 of the crimp can project towards the side of the first housing part 11 opposite the opening 17 or in the opposite direction. The crimp 25 preferably circumferentially encloses the opening 17 closed.

[0075] The second housing part 18 is of a material, preferably a sheet material, which preferably has no flameproof open pores or gaps, which fluidically connect the interior space 14 of the housing 10 with the surroundings 15. As is apparent from Figure 1c It is apparent that the housing 10, in addition to or as an alternative to the internal pressure relief device 23 and / or the external pressure relief device 22 carried by the first housing part 11, can hold a further pressure relief opening 27a and a further external pressure relief body 27b forming a further external pressure relief device 28 and / or hold a further internal pressure relief device (not shown). These can be configured, for example, as described above in connection with the internal and / or external pressure relief device 23, 22 of the first housing part 11 and serve the same purpose. The pressure relief opening 27a in the second housing part 18 belongs to the external pressure relief device 28, which is closed flameproof but gas-permeable with the pressure relief body 27b.

[0076] The first housing part 11 and the second housing part 18 can be made, for example, of steel sheet or aluminum sheet. The first housing part 11 and / or the second housing part 18 can alternatively be made of plastic. The edge section 20 and / or the flange section 13 is preferably a sheet section. The thickness, for example the sheet thickness, of the flange section 13 and / or of the edge section 20 can be less than or equal to 5 mm, less than or equal to 3 mm or less than or equal to 2 mm. Due to the external pressure relief device 22, 28 and / or the internal pressure relief device 23, which so strongly limits the explosion pressure that even a housing 10 made of a metal material and / or a plastic material with such a sheet thickness can withstand the explosion pressure, the housing 10 can have such a small wall thickness without further stabilizing measures.

[0077] As is further apparent from Figure 1c The second housing part 18 has a further, circumferentially closed crimp 29 in the edge section 20 forming a second wall section of the second housing part 18. The crimp 25 and the further crimp 29 are as apparent from Figure 2As can be seen, a receiving portion-back pair is formed. Here, the arched structure formed by the bottom of the additional rolled edge 29 is received in the receiving portion 30 formed by the rolled edge 25 of the first housing portion 11.

[0078] Figure 2 The first housing portion 11 and the second housing portion are shown abutting each other in a non-clamped state. Figure 1a The image also shows the housing 10 in this state without the clamping device. (By...) Figure 2 Furthermore, a support region 31 is defined for the first segment 13 and the second segment 20, in which a support region is provided when the second housing portion 18 is placed on the first housing portion 11 (e.g. Figure 1a and Figure 2 (As shown), but when the first housing portion 11 and the second housing portion 18 are not clamped together in an explosion-proof state as in the housing 10, the edge section 20 of the second housing portion 18 is supported at the flange section 13 of the first housing portion 11. Figure 2 As explained, the shapes of the edge section 20 and the flange section 13 are not complementary. More specifically, the gap-shaped intermediate region 32 opens away from the support region 31 in a direction away from the support region 31. The intermediate region 32 is defined by the opposing first surface 33 of the first section 13 and the second surface 34 of the second section 20. In the clamping region 35, which can also be called the force introduction region or pressing region and defines the clamping region for the flange section 13 and the edge section 20, the sheet material of the first housing portion 11 and the sheet material of the second housing portion 18 are spaced apart from each other. The intermediate region 32 forms the separation portion of the housing 10.

[0079] It should be noted here that the intermediate region 32 may be completely or partially filled or left empty. The intermediate region 32, whether completely or partially filled, may be filled, for example, with a plastic element.

[0080] When the edge section 20 of the second housing portion 18 and the flange section 13 of the first housing portion 11 are not clamped together, the intermediate region 32, although abutting, still lacks geometric shape, particularly in terms of length and / or maximum width, and is therefore explosion-proof. To close the opening 17 explosion-proofly with the second housing portion 18, the edge section 20 and the flange section 13 must be clamped together. For this purpose, a clamping device 36 is used, such as in… Figure 3 As shown in the figure. The figure shows the arrangement of... Figure 1a A part of the shell. Made of Figure 4It is known that, by means of the clamping device 36, the edge region as a clamping region of the edge section 20 and of the flange section 13 are pressed against one another in order to close the intermediate region 32 in a manner that is explosion-proof. Due to the small material thickness of the edge section 20 and of the flange section 13, a small force is already sufficient for clamping in order to deform the edge section 20 and the flange section 13 in such a way that the intermediate region 32 is narrowed by the deformation of the flange section 13 and / or of the edge section 20, so that the intermediate region 32 has an explosion-proof gap geometry in the clamped state. The 0-Ex gap (explosion-proof gap with a gap width of 0) is formed by the deformation of the edge section 20 and / or of the flange section 13.

[0081] Figure 5 The exemplary geometric proportions in the housing 10 according to the application are explained in more detail. When the second housing part 18, preferably a plate, and the first housing part 11, preferably a plate, are in abutment, but not yet clamped, the spacing b between the plate section of the first housing part 11 and the plate section of the second housing part 18 is equal to 0 or in some places greater than 0 in the intermediate region 32 and in the support region in the interior space 14 of the housing 10. The spacing b greater than zero can exist in some places along the edge of the first housing part 11 due to the predetermined shape of the second housing part 18, which deviates from the shape of the first housing part 18.

[0082] The intermediate region 32 can expand away from the support region 31 to a width a (a is greater than b). The radius of the circular back 38, which is formed by the edge section 20, can be r1, wherein the radius of the receptacle 30 can be, for example, r2 and r1 is smaller than r2. By clamping the first housing part 11 and the second housing part 18 to one another by means of the force introduced into the introduction region 35 away from the support region 31, the shape, in particular the radius, of the edge section 20 and of the flange section 13 are matched to one another. They do not have to be congruent thereafter, but the radii r1, r2 are, for example, commensurate with one another, without having to be identical. In an embodiment, the radii r1, r2 can be commensurate, so that these radii are identical in the clamped state.

[0083] The first housing part 11 and / or the second housing part 18 can have a device 39 in order to define a curved region 40 of the first housing part 11 and / or of the second housing part 18. In Figure 5In the embodiment shown, the means 39 are, for example, recesses in the second housing part at the edge of the bead 29. The recesses 39 can be trough-shaped and closed in the circumferential direction or extend along the bead 29 discontinuously, for example in a straight line. The higher flexibility in the bending region 40 can be determined by a structural change in the region of the sheet metal material, for example, by the recess (not shown), in addition to or as an alternative to the smaller wall thickness. In particular when the means 39 for determining the bending region 40 are present in the second section 20 and / or in the first section 13, the shape change on clamping can be predetermined particularly precisely. The material, in particular the sheet metal material, of the first section 13 and / or of the second section 20 can be configured more purposefully with such means 39 to be sufficiently strong in order to be able to withstand an explosion and sufficiently flexible in order to keep the forces for deforming to form the explosion-protected intermediate region 32 small.

[0084] In Figure 5 , a region is marked with a thicker line, which is closed on clamping such that this region follows the requirements for the Ex-gap.

[0085] Figure 6a and 6b Another embodiment of the application is shown. The shape and / or the position of the first face 33 of the first section 13 and the shape and / or the position of the second face 34 of the second section 20 define the intermediate region 32 when the first housing part 11 and the second housing part 18 are assembled in order to close the housing 10. The intermediate region 32 has a gap size outside the region of the explosion protection when the first housing part 11 and the second housing part 18 are not clamped sufficiently. The first housing part 11 and the second housing part 18 are thus provided and defined for, when these housing parts are assembled as intended but not clamped, to define a spacing at the separation site, which takes up the gap size of the explosion protection only as a result of the clamping of the first housing part 11 and / or of the second housing part and the resulting deformation. In Figure 6a , 6b , the embodiment shown in Fig. 6c, the bead is V-shaped. The figures show another example in which the deformed first section 13 and / or the deformed second section 20 have a kink and / or a bend 25, 29.

[0086] The kinks and / or bends 25, 29 preferably form an elongated slot shape, which extends transversely to the relevant (effective) length Leff of the intermediate region 32. The relevant length Leff of the intermediate region 32 is measured from the input end 41 of the intermediate region 32 to the output end 42 of the intermediate region 32. The length Lgerade of the intermediate region 32 measured in straight direction from the input end 41 of the intermediate region 32 to the output end 42 of the intermediate region 32 can be much shorter due to the kinks and / or bends than the effective length Leff of the intermediate region 32. The effective length Leff of the intermediate region 32 determines the flameproof strength or the flameproof safety of the intermediate region 32. Here, it is assumed that a gas is cooled down to such an extent that it can no longer trigger an explosion at the output end 42 of the intermediate region 32 when the gas has passed through the intermediate region 32 over a distance corresponding to said limited length Leff.

[0087] The small wall thicknesses make it possible to use sheet metal structures and sheet metal technology. By means of the shaping at the sheet metal elements, the sheet metal pairs as first and second sections, which can be deformed in the elastic region of the sheet metal and which define the sheet metal formed gap geometry of the intermediate region, can be formed by means of known sheet metal forming methods, such as deep drawing, metal extrusion, rolling, crimping, bending, high-pressure forming, stretching, extrusion, calendering, laser beam bending, etc. The two sheet metal sections defining the intermediate region can be deformed by clamping such that the intermediate region is closed as an Ex-gap. This does not mean that the intermediate region is gas-tight, but no gas or particles can leave the intermediate region in the event of a hot enough ignition of the atmosphere outside the housing 10.

[0088] Figures 6a to 6c Figs. 6 and 7 show some embodiments in which the first housing part 11 and the second housing part 18 do not have a complementary V-shape to each other, so that the sheet metal formed geometry is likewise V-shaped. The wall faces 33 of the sheet metal sections 13 of the first housing part 11 and of the sheet metal sections 20 of the second housing part 18, which are opposite each other and which define the intermediate region 32 therebetween, enclose different angles a1, a2. In the case of the embodiment of Fig. 6, the angles a1, a2 are equal to each other, so that the sheet metal formed geometry is likewise V-shaped. In the case of the embodiment of Fig. 7, the angles a1, a2 are unequal to each other, so that the sheet metal formed geometry is likewise V-shaped. Figure 6a and 6bIn the embodiment shown, the outer face 34 of the back-shaped section 20 of the second housing part 18 is V-shaped in cross-section and defines a smaller opening angle a2 than the wall face 33 of the sheet metal section 13 of the first housing part 11 which delimits the elongate receptacle 30. Thereby a support region 31 is defined at the bottom of the elongate receptacle 30. At the free ends of the sheet metal sections 13, 20, the spacing (spacing a) between the first housing parts is (in the unclamped state) greater than in the support region 31. The intermediate region 32 is therefore increasingly open outward. In the support region 31, the spacing (b) can be zero, for example, or greater than zero if an intermediate element is arranged between the sheet metal section 13 of the first housing part 11 and the sheet metal section 20 of the second housing part 18. The spacing can also be greater than zero in places in the unclamped state when the first housing part 11 and the second housing part 18 only pointwise abut in the unclamped state due to manufacturing tolerances.

[0089] The opening angle a1 of the receptacle-like hem 25 is greater than the opening angle a2 defined by the face 34 of the sheet metal section 20 of the second plate 18 facing the first plate 11. Within and outside the circumference defined by the intermediate region 32, force introduction regions are defined as shown by the arrows. There, the sections of the sheet metal sections 13, 20 press against the abutment sections 13, 20 in opposite directions. Unclamped abutment or unclamped state means that the first section 13 and the second section 20 have not yet pressed against one another in the intermediate region 32 in a manner which is explosion-proof closed.

[0090] As can be seen in Figure 6b , the sheet thickness of the first housing part 11 is greater than the sheet thickness of the second housing part 18. In the clamped state, the shape of the hem matches one another, so that the difference between the angles a1, a2 of the faces 33, 34 of the first plate 11 and the second plate 18 which are directed toward one another is smaller in the clamped state than in the unclamped state. Due to the different sheet thicknesses (and thus the different flexibilities), the region of the second section 20 of the second housing part 18 passes through a greater section of the path S than the region of the first section 13 of the first housing part 11, which is the path which has to be passed in order to deform in an explosion-proof manner.

[0091] The path S is shown in Fig. 6, which the first housing part 11 and the second housing part 18 have to pass at least partially toward one another in order to close the intermediate region 32 to zero or at least in such a way that explosion-proof safety is established. The path S can be passed primarily (more than half) by the second housing part 18 or the first housing part 11, depending on which housing part 11, 18 is respectively more flexible, due to the sheet thickness, the material, the structure, the shape and / or other properties.

[0092] The intermediate region 32 opens more and more inwardly away from the bottom of the housing 30 due to the different opening angles a1, a2. The spacing c of the plate sections 13 of the first housing part 11 and of the second housing part 18 is equal to the spacing a (in the clamped state and in the clamped condition) within the circumference defined by the housing 30 and / or the intermediate region 32.

[0093] In the embodiment according to Figure 7 the face 34 of the back region of the plate section 20 of the second housing part 18 encloses a greater opening angle a2 than the opposite face 33 of the plate section 13 of the first housing part 11. The spacing b between the tip 43 of the back and the bottom 26 of the elongated recess 25 is greater than the spacing a, c of the plate sections 13 of the first housing part 11 and of the plate sections 20 of the second housing part 18 within and / or outside the circumference, which is determined by the tip 43 of the back 38. Preferably b > a and a > c.

[0094] In the embodiment according to Figure 6a , 6b and 7 the arrows indicate examples of possible force application sites for clamping the first housing part 11 and the second housing part 18, whereby the intermediate region 32 between the plate sections 13 of the first housing part 11 and the plate sections 20 of the second housing part 18 is closed explosion-proof by the clamping and the resulting elastic deformation of the plate sections 13 of the first housing part 11 and of the plate sections 20 of the second housing part 18.

[0095] In the embodiment according to Figure 7 the intermediate region 32 opens more and more from the inside outwardly towards the bottom 26 of the housing 25 and from the outside inwardly towards the bottom 26 of the housing 25 in the unclamped state of the second housing part 18 and the first housing part 11, but in the condition suitable for clamping. The path S for closing the intermediate region 32 explosion-proof is thus mainly passed by the frame section 20 of the second housing part 18 due to the smaller thickness of the material of the second housing part 18, which is more flexible due to the smaller thickness than the flange section 13.

[0096] Figures 8a to 8bAn embodiment is shown with a first housing part 11 and a flange section 13, which is a section of the first housing part 11 that protrudes inwards. The flange section 13 forms an elongated recess 30, which can for example be V-shaped or U-shaped. The second housing part 18 forms a back 38, which is arranged in the recess 30 in the unclamped state and when the first housing part 11 and the second housing part 18 are pressed against one another in order to clamp, or in the clamped state. An intermediate frame 45 is arranged between the sheet metal section 13 of the first housing part 11 and the sheet metal section 20 of the second housing part 18, so that the first section 13 of the first housing part 11 and the second section 20 of the second housing part 18 do not press against one another directly, but via the intermediate frame 45. The intermediate frame 45 is a separate part from the first housing part 11 and the second housing part 18, but can be connected, in particular bonded, to the first housing part 11 or the second housing part 18. The intermediate frame 45 can be made of plastic, while the first housing part 11 and the second housing part 18 can be made of the same plastic, of another plastic or of metal. The elastic deformability of the intermediate frame 45 can be greater than the deformability of the sheet metal section 13 of the first housing part 11 and the sheet metal section 20 of the second housing part 18, which are opposite one another, so that the shape of the first sheet metal section 13 of the first housing part 11 and the shape of the second sheet metal section 20 of the second housing part 18 approach one another by elastic deformation of the sheet metal section 20 of the first housing part 11 and / or the second housing part 18, if the first housing section 11 and the second housing section 18 are clamped to one another. The shape of the sheet metal section 13 of the first housing part 11 and the sheet metal section 20 of the second housing part 18 do not have to be complementary to one another, even in the clamped state. The elastically flexible intermediate frame 45 can support the explosion-proof closure by deformation of the second section 20 and / or the first section 13 in such a way that the deformation of the intermediate frame 45 fills the gap and thus contributes to the overall explosion-proof intermediate region 32.

[0097] In Figure 9a and 9b another embodiment of the intended shape of the sheet metal sections 13, 20 of the first housing part 11 and the second housing part 18 of the housing 10 according to the application is shown, which are not complementary to one another in the pressed state. Figure 9aA portion of the explosion-proof housing 10 according to the invention is shown between two parallel cross-sectional planes. At least one segment of the plate section 13 of the first housing portion 11 and at least one segment of the plate section 20 of the second housing portion 18 are enclosed by the wall 12 of the housing 10 at an angle β less than 90°. A bending spring is formed therebetween to explosively close the intermediate region 32 when clamped. The free ends of the plate section 13 of the first housing portion 11 and the plate section 20 of the second housing portion 18 are arranged between the open plane of the housing 10 and the opposite back or bottom plane.

[0098] according to Figure 9a , 9b The embodiment is achieved without the groove-shaped and / or elongated recess 30 and, for example, a corresponding arched structure 38 that may be in the shape of a back. However, according to... Figure 9a , 9b Variations of the embodiment are also possible, in which grooves 30, particularly slots and / or elongated grooves, are formed in the first plate segment 13 and / or the second plate segment 20, into which an arched structure 38, particularly a back, of another plate segment 20 can be arranged. When an example is shown where the first housing portion 11 forms the receiving portion 30 and the second housing portion 18 forms the back, the first housing portion 11 may additionally or alternatively form the back 38 and the second housing portion 18 may form the receiving portion 30.

[0099] exist Figure 9a , 9b In the illustrated embodiment, when the second housing portion 18 abuts (with a spacing b greater than or equal to 0) against the first housing portion 11 (directly or indirectly (not shown) via intermediate element 45), the intermediate region 32 wedges relative to the reference plane increasingly toward the free ends of the first housing portion 11's segment 13 and the second housing portion 18's segment 20 due to the different angles γ1, γ2 of the second segment 20 and the first segment 13. The plate segment 13 of the first housing portion 11 and / or the plate segment 20 of the second housing portion 18 may have means 39 for determining the bending region 40. The means 39 may be present, for example, in recesses within the segments of the first housing portion 11 and / or the second housing portion 18. Other possibilities include structural modifications, such as through heating and / or alteration.

[0100] An intermediate region 32 with a wedge-shaped gap is formed between the second section 20 and the first section 13. This intermediate region narrows due to clamping to ensure explosion-proof closure. This is achieved due to the shapes of the first housing portion 11 and the second housing portion 18. Figure 9a , 9bWhen the flanges abut as shown (in which case there is a smaller internal gap than external gap between the sections), the force is distributed when clamped, so that there is maximum abutment force internally, thus preventing expansion by explosion at this point.

[0101] Figure 9c A variant of the example according to Figure 9a , 9b is shown. In this variant, the intermediate region 32 widens from outside to inside (b > a).

[0102] Figure 10a and 10b An embodiment of the housing 10 according to the application is shown, in which the flange section 13 of the first housing part 11 and the abutment section 20 (imaginary frame-shaped section) of the second housing part 18 have complementary nominal shapes. In the embodiment shown, the first section 13 and the second section 20 have flat, complementary nominal shapes. However, the first section 13 and the second section 20 are manufactured with a tolerance which is so coarse that the intermediate region 32 between the first housing part 11 and the second housing part 18 is closed explosion-proof only by elastic deformation of the first section 13 and / or the second section 18 due to clamping. The abutment of the second housing part 18 on the first housing part 11 without clamping does not yet safely result in an explosion-proof geometry of the intermediate region 32. The first section 13 of the first housing part 11 and the second section 20 of the second housing part 18 can for example have a wall thickness of a maximum of 5 mm, preferably a maximum of 3 mm, particularly preferably a maximum of 2 mm. With such a small wall thickness, a small force applied when clamping is sufficient to achieve the deformation by which the intermediate region 32 is closed explosion-proof. As in the other embodiments, the first section 13 and / or the second section 20 can also be made of sheet metal, in particular steel sheet or aluminum sheet, or of plastic.

[0103] Figure 10b Housing parts clamped to one another are shown. For this purpose, a clamping device 36 is used. The clamping device 36 can have for example a frame-shaped first block 50 and for example a frame-shaped second block 51, which are pressed against one another by means of a clamp in order to press the frame section 20 and the flange section 13 against one another on the inside. Due to the application of force, an explosion-proof separation 32 is achieved, which also does not let hot gases and / or particles suitable for igniting the surroundings 15 out in the event of an explosion in the interior space 14 of the housing 10. The intermediate region 32 between the first housing part 11 and the second housing part 18 is closed to an explosion-proof gap, for example 0 gap.

[0104] Figure 10c In the middle, on the left, a strongly schematic side view shows that the first section 13 and / or the second section 20 can have a strongly wavy shape due to coarse manufacturing tolerances. Figure 10c An embodiment of the housing 10 according to the application is shown, in which the flange section 13 of the first housing part 11 and the abutment section 20 (imaginary frame-shaped section) of the second housing part 18 have complementary nominal shapes. In the embodiment shown, the first section 13 and the second section 20 have flat, complementary nominal shapes. However, the first section 13 and the second section 20 are manufactured with a tolerance which is so coarse that the intermediate region 32 between the first housing part 11 and the second housing part 18 is closed explosion-proof only by elastic deformation of the first section 13 and / or the second section 18 due to clamping. The abutment of the second housing part 18 on the first housing part 11 without clamping does not yet safely result in an explosion-proof geometry of the intermediate region 32. The first section 13 of the first housing part 11 and the second section 20 of the second housing part 18 can for example have a wall thickness of a maximum of 5 mm, preferably a maximum of 3 mm, particularly preferably a maximum of 2 mm. With such a small wall thickness, a small force applied when clamping is sufficient to achieve the deformation by which the intermediate region 32 is closed explosion-proof. As in the other embodiments, the first section 13 and / or the second section 20 can also be made of sheet metal, in particular steel sheet or aluminum sheet, or of plastic.Figure 10b The alternative clamping device 36. (In press) Figure 10a , 10b In a variant of the implementation, the first segment 13 and the second segment 20 are in accordance with Figure 10c In some embodiments, grooves 52, 53, and in particular holes, are provided for bolts 54, and in particular screws. One or more blocks 50, 51 have corresponding grooves 55, 56, and in particular holes, to receive bolts 54, which are guided through grooves 52, 53 in the first section 13 and the second section 20. Blocks 50 and / or 51 may in particular have threaded holes. Figure 10c On the right, a cross-sectional view along the circumference of either the first housing portion 11 or the second housing portion 18 shows the clamping device 36 in the clamped state. Blocks 50 and 51 are pressed against each other by bolts 54, thus clamping the first section 13 and the second section 20 together and thereby sealing the intermediate region 32 in an explosion-proof manner through the elastic deformation of the first section 13 and / or the second section 20. The locally non-zero gap width shown between the first section 13 and the second section 20 indicates that explosion-proof safety is achieved with a sufficiently large length and small width of the gap-shaped intermediate region 32, where these two dimensions are related to each other. Sufficient clearance exists between the recesses 52 and 53 in the first section 13 and the second section 20 for receiving the bolts 54 and the internal space 14 of the housing 10, so that the intermediate region 32 has a sufficient length for explosion-proof safety, measured from the internal space 14 to the recesses 52 and 53.

[0105] Figure 11a It shows Figure 10a and 10b An exemplary view of the face 33 of section 13 of the first housing portion 11. Figure 11b Another example is shown. Shaded areas 46 are indicated where the face 34 of the second segment 13 of the second housing portion 18 is randomly abutted against the first housing portion 11 in an unclamped state. These areas 46 have random sizes and shapes, such as island shapes and / or strip shapes, and are randomly distributed above the face 33 of the first housing portion 11. The geometry of the passage areas 46 and / or between two areas 46 of the spacing 32 is not explosion-proof in the unclamped state. (See attached image.) Figure 10a and 10b As explained, the intermediate region 32 narrows geometrically only after elastic deformation, thus making this intermediate region explosion-proof.

[0106] Figures 12, 13 show some examples of methods 100, 200 according to the application. In Figure 12, for example, a method 100 for manufacturing a housing 10, for example as described previously in connection with Figures 1 to 11c, is shown. The method has the selection 101 of a first section 13 and a second section 20 for defining an intermediate region 32 of the housing 10, wherein at least one of the sections 13, 20 is a wall section. The first section 13 and the second section 20 are then selected such that the first section 13 and the second section 20 can be pressed against each other with the aid of a clamping device 36 under elastic deformation of the wall sections 13, 20, whereby the intermediate region 32 is closed in terms of geometry by the elastic deformation of the wall sections 13, 20. The first section 13 and the second section 20 are thus selected in coordination with each other in terms of shape, wall thickness, material, modulus of elasticity, etc., such that the intermediate region 32 can be closed in terms of geometry by the deformation in a manner that is explosion-proof.

[0107] In embodiments in which the first section 13 and the second section 20 are respectively a sheet section, the intermediate region 32 is formed by the abutment with an elastically adaptable sheet gap geometry, which is narrowed in terms of geometry by the deformation of the at least one wall section 13, 20 in order to close the intermediate region in a manner that is explosion-proof.

[0108] Figure 13 shows a method 200 for establishing an explosion-proof connection between a first section 13 with a first face 33 of a first housing part 11 of a housing 10 and a second section 20 with a second face 34 of a second housing part 18, as described in connection with Figures 1 to 11c. At least one of the sections 13, 20 is a wall section. The method 200 has the assembly 201 of the first housing part 11 and the second housing part 18 in order to close the housing 10. In the assembled first housing part 11 and second housing part 18, the first face 33 and the second face 34 define an intermediate region 32, which has a gap dimension outside the region that is explosion-proof. The sections 13, 20 are loaded 202 with a force, wherein the sections 13, 20 are pressed against each other under elastic deformation of the at least one wall section 13, 20, whereby the intermediate region 32 is closed in terms of geometry by the elastic deformation of the wall sections 13, 20 in a manner that is explosion-proof. In some embodiments, the first section 11 and the second section 18 are deformed relative to each other, wherein the first section 11 and the second section 18 pass through different sections of the path S required for the explosion-proof closure depending on the flexibility of the elasticity. The deformation serves to close the gap 32 in terms of geometry.

[0109] The connection is preferably reestablishable. To this end, the clamping is released 203 and the second housing part 18 is removed 204 from the first housing part 11. The second housing part 18 and the first housing part 11 can be brought into abutment again for the reestablishment 205 of the connection and can be reused according to the method of Figure 13.

[0110] An explosion-proof housing (10) is described, which forms an inner space (14) for accommodating components (16) which can form an ignition source. The housing has a first housing part (11) with a first section (13) having a first face (33) and a second housing part (18) with a second section (20) having a second face (34), wherein the first section (13) and / or the second section (20) are sections of a wall (12, 19), wherein the first face (33) and the second face (34) define an intermediate region (32). The first section (13) and the second section (20) are pressed against each other upon elastic deformation of the wall sections (13, 20), whereby the intermediate region (32) is closed in terms of geometry by the elastic deformation of the wall sections (13, 20). Furthermore, a method (200) for establishing an explosion-proof connection between the first section (13) with the first face (33) of the first housing part (11) and the second section (20) with the second face (34) of the second housing part (18) of the housing (10) is described, wherein at least one of the sections is a section of a wall (13, 20). Another method (200) for establishing an explosion-proof connection between the first section (13) with the first face (33) of the first housing part (11) and the second section (20) with the second face (34) of the second housing part (18) of the housing (10) is described, wherein at least one of the sections is a section of a wall (12, 19).

[0111] List of reference signs

[0112]

[0113]

Claims

1. Explosion-proof housing (10) forming an inner space (14) for accommodating components (16) which can form an ignition source, the explosion-proof housing having a first housing part (11) with a first section (13) and a second housing part (18) with a second section (20), the first section having a first face (33) and the second section having a second face (34), wherein The first section (13) and / or the second section (20) are wall sections, wherein the first face (33) and the second face (34) define an intermediate region (32), wherein the first section (13) and the second section (20) press against each other upon elastic deformation of the wall sections, whereby the intermediate region (32) is closed in a geometrically explosion-proof manner by the elastic deformation of the wall sections, wherein the first section (13) and the second section (20) enclose an angle in an unclamped state due to the geometrically intended shape of the first section (13) and the second section (20) when the first housing part (11) is applied against the second housing part (18), wherein the width of the intermediate region (32) increases in an unclamped state from the support region (31) in the direction of the surroundings (15) of the explosion-proof housing (10) and / or in the direction of the interior space (14) due to the intended shape of the first section (13) and the second section (20) when the first housing part (11) and the second housing part (18) are applied against each other.

2. The explosion-proof housing (10) according to claim 1, wherein The first section (13) is a sheet section and / or the second section (20) is a sheet section.

3. The explosion-proof housing (10) according to claim 2, wherein The sheet thickness of the first section (13) and / or of the second section (20) is at most 5 mm or at most 3 mm.

4. The explosion-proof housing (10) according to any one of claims 1 to 3, wherein The second section (20) supports the first section (13) directly or indirectly in the defined support region (31) when the intermediate region (32) is closed in an explosion-proof manner by elastic deformation, wherein the support region (31) forms an inner edge and / or an outer edge of the intermediate region (32).

5. The explosion-proof housing (10) according to any one of claims 1 to 3, wherein The first section (13) and / or the second section (20) form an elongated accommodation (30), and wherein the second section (20) and / or the first section (13) have at least one elongated arching structure (38) which is accommodated in the accommodation (30).

6. The explosion-proof housing (10) according to any one of claims 1 to 3, wherein At least one elastically deformable intermediate element (45) is arranged between the first section (13) and the second section (20), which press against each other via the intermediate element.

7. The explosion-proof housing (10) according to claim 6, wherein The intermediate element (45) is frame-shaped.

8. The explosion-proof housing (10) according to any one of claims 1 to 3, wherein The first face (33) of the first section (13) and / or the second face (34) of the second section (20) which define the intermediate region (32) are obliquely oriented with respect to a wall (19) of the explosion-proof housing (10).

9. The explosion-proof housing (10) according to any one of claims 1 to 3, wherein The first section (13) and / or the second section (20) have means (39) for determining a bending region (40).

10. The explosion-proof housing (10) according to any one of claims 1 to 3, wherein The explosion-proof housing (10) is reclosable.

11. The explosion-proof housing (10) according to any one of claims 1 to 3, wherein The explosion-proof housing (10) is equipped with an internal pressure relief device (23) and / or an external pressure relief device (22, 28).

12. Method (100) for manufacturing an explosion-proof housing (10) according to any one of claims 1 to 11, wherein The method (100) has: The first section (13) and the second section (20) are selected (101) to define an intermediate region (32) of the explosion-proof housing (10), wherein at least one of the first section (13) and the second section (20) is a wall section, i.e. the first section (13) and the second section (20) can be pressed against each other under elastic deformation of the wall section, so that the intermediate region (32) is closed in terms of geometry by the elastic deformation of the wall section.

13. Method (200) for establishing an explosion-proof connection between a first section (13) with a first face (33) of a first housing part (11) and a second section (20) with a second face (34) of a second housing part (18) of an explosion-proof housing (10) according to any one of claims 1 to 11, wherein At least one of the first section (13) and the second section (20) is a wall section, the method having the steps of: - assembling (201) the first housing part (11) and the second housing part (18) in order to close the explosion-proof housing (10), wherein the first face (33) and the second face (34) define an intermediate region (32) having a gap dimension outside the region of explosion protection, - loading (202) the first section (13) and the second section (20) with force, so that the first section (13) and the second section (20) are pressed against each other under elastic deformation of the wall section, so that the intermediate region (32) is closed in terms of geometry by the elastic deformation of the wall section.

14. The method (200) according to claim 13, wherein The intermediate region (32) is closed by the deformation of the wall section through the path (S), so that this intermediate region is explosion-proof.

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