The present invention relates to an explosion-proof housing for means for transmitting and / or receiving electromagnetic radiation, comprising a housing body which is adapted to receive such a transmission and / or reception means, and a window element having a first side facing the housing interior side and an opposite second , the housing interior side facing away from said window element to electromagnetic radiation is permeable.
In the measurement technology, particularly in security systems, such as in the detection of hazardous characteristics such as toxic gases, fire gases and electromagnetic radiation, flames and sparks, electronic detection devices, such as fire detectors such as flame detectors, wireless detectors, gas detectors, and other devices to environments and places used where a risk of explosion.
Examples of such environments and places where explosive gases or dusts may occur, grain mills, flour silos, chemical plants, tank farms, mines, refineries, oil rigs, drilling and tankers, spray booths, gas compressor stations, wood processing plants, paper mills and sewage treatment plants.
Electronic detection devices that can be used in hazardous locations must comply with special security requirements. These have the goal either an ignition source, which could possibly cause an explosion ruled out or to prevent an emerging inside the closed volume of the device housing explosion has an impact on the environment.

This goal is achievable in various ways, which are referred to in relevant European and international standards as types of protection.

Requirements for avoiding an ignition source is exemplified by the standards IEC 60079-1 and EN 60079-1 1. 1 The type of protection for this is called "intrinsic safety" (Ex-i). This is achieved when the electrical quantities always be current, voltage and power in the unit below a specified limit. The limit values ​​must be chosen so that even in case of failure,

is produced for example by a short circuit, no ignitable source such as a spark or a hot surface.

If no measures are taken to meet the requirements for intrinsic safety, you can, for example, the housing of the device in the "flameproof enclosure" (Ex d) form. This type of protection is described in IEC 60079-1 and EN 60079-1 ,

Devices that are designed according to the type of protection "flameproof enclosure" (ex-d) have a pressure-resistant housing, which ensures that occurring in the interior of the housing exploded not in the environment, not in the room or the area of ​​the installation site of the the housing can be transferred. This means that upon the occurrence of an internal explosion of the housing must not be damaged in other words, and a crossing of the blast on the wall or a gap of the housing also is prevented in the external environment of the housing. a housing which is configured and meets these requirements, in particular by certifications according to standards IEC 60079-1 and EN 60079-1, is here and hereinafter referred to as pressure-resistant housing. a pressure-resistant housing is thus a housing,formed in the flameproof enclosure Ex-d for use in a hazardous area for gases.

Compounds of housing parts and constructively resulting column must be zünddurschlagsicher formed to meet the above standards. A flameproof compound, and a flameproof gap ensure that an occurring inside the housing explosion can not be transferred into the environment, not in the room or the area of ​​the installation site of the housing.

In the type of protection "protected by enclosures", Ex-t, the protection concept based on the use dustproof housing with the protection IP 5X and dustproof housing with the protection IP 6X, along with the limitation of the surface temperature of the equipment, so that the outer dust atmosphere can not ignite. The devices are subjected to IP protection test.

If in connection with the invention of "protection IP ...", it is hereby IP code classification, for example in accordance with DIN EN 60529 (VDE 0470-1). 2014-09, meant.

The devices must also an environmental assessment for. B. be subjected in accordance with IEC 60079-0 and IEC 60079-31. The environmental tests include, among others, a heat and cold resistance test in plastic housing parts, a shock and impact test, and a pressure test. Equipment of this type of protection must meet the requirements, for example, the standard IEC 60079-31.

Through the dust-proof housing prevents a combustible dust from entering the case and could then be ignited. Electrically conductive dust, such as metal dust is held by the dust-proof design of the housing and thus can not lead to dangerous overheating by short circuits or electrical transition resistances.

A housing formed of protection "protection by enclosure" Ex-t to meet, in particular through approvals according to IEC 60079-31 or EN 60079-31, is here and hereinafter referred to as dust-proof housing. A dust-proof housing is thus a housing formed in the type of protection "protection by enclosures" Ex-t for use in hazardous areas for dust.

Explosion-proof housing having a window element of means for sending and receiving electromagnetic radiation, are known in principle.

Thus DE202006014464 discloses a pressure-resistant housing with a configured as a transparent solid window element of an optical assembly for engaging and / or coupling out of electromagnetic radiation. The transparent solid body is held in a pressure-resistant sealing compound.

A disadvantage of such housings in the prior art are high manufacturing costs. Further, several components are necessary in the prior art to the window element in a captive and pressure-resistant, flame-proof arrange other words the chassis. An exchange of the window element or a housing part with window element is further not or only with great effort.

The above definitions, in particular to the terms of flameproofness, dust-proof and explosion protection, also apply to the explained below the invention and embodiments of the invention.

The invention was thus based on the object to improve an explosion-proof enclosure of the type indicated at the outset such that the above-named disadvantages are substantially reduced as possible. In particular, the task was based to reduce manufacturing costs, without the protection to compromise particular run as flameproof enclosure and in addition to ensure a high degree of flexibility in the use of such housing, and particularly in maintenance and repair.

The invention achieves this object for an explosion-proof enclosure of the type mentioned in a first aspect by the housing body has a flange on the second side of the window element, which presses the window element in the direction of a formed in the interior of the housing seat, so that the housing as pressure-proof housing and / or is formed as a dust-proof housing. Preferably, the seat in the interior of the housing body is arranged. More preferably, the seat is one piece marked with the housing body. In particular, the seat is formed as a projection of the inner transformation of the housing body. In this way, the assembly is further simplified because the number of components can be reduced.

The flange for the mechanical mounting of the window element is understood as a metallic clamping element, produced by the mechanical bending, in particular by means of cold forming, an opening provided on the housing body metal edge with a suitable tool such. For example, a cylindrical roller or a ball. An advantage of this method, the increase in strength by cold working of the metal. The metal edge is preferably formed in the raw state of the housing body before the beading as taper, in particular as a bevel or axially projecting ring portion. A further advantage is that performed by the low material use of the flanging only a narrow cover in the edge region of the window element, so that a free unobstructed window area A uis achieved for the passage of electromagnetic radiation. Furthermore is achieved by the execution of the flanging, that a small attack surface for contaminants present at the window element.

By flanging cost-efficient production is made possible since no other parts or housing parts or other measures to ensure the flameproof connection of the window element to the housing body are necessary.

Preferably, the window member for electromagnetic radiation in the wavelength range 0, 15 μιτι to 15.0 μιτι, more preferably 1 to 6 μητι μιτι permeable.

The transmission for the preferred wavelength range is preferably greater than 80%. In order to ensure a wide field of view, the material of the window element has a low refractive index as possible, preferably less than

According to a particularly preferred development of the invention is between the seat and the first side of the window element and / or between the flange and the second side of the window element (each) is arranged an elastic sealing member. By means of the flanging of the housing body, the window element and the or the sealing elements are in this case dust-proof and preferably water and / or air tight, held in contact with each other. protection is here regarded IP67 or better than waterproof. The connection of the window element to the housing, and the gap is preferably formed in the process are preferably flame-proof.

By the one or more resilient seal elements, it is possible that the energy of shock pulses is attenuated to the window member or absorbed. The size of the window element, in particular the thickness which sets the distance of the first and the second side of the window element and the material of the window member and the elasticity of the or of the sealing elements are formed so that the window element to the action of an impact energy of 2 J to 7 J (Joule) resists. Depending on the area of the window element, the impact energy is more preferably 2 or J 4 J. An impact energy of 2 J, for example, assumed when the surface to be protected is less than 2500 mm 2is. The window member preferably has to withstand without damage a vertically falling proof mass of 1 kg. This impact test is carried out for example in the standard IEC 60079-0 with a proof mass of 1 kg and a steel ball of 25 mm diameter as the impact surface, the steel ball is located under the proof mass and in contact with the window surface when serving.

The tightness is checked in the environmental review, after the impact test and a minimum protection IP5x must match, for example. To IEC60529. In a particularly preferred embodiment, the dust-resistant with a resistance of protection is after the impact pulse IP6x.

According to another embodiment, which is also a preferred embodiment of the first aspect and an independent second aspect of the aforementioned housing, the window member has a peripheral surface extending from the first side to the second side, and fixed to the housing by means of an elastic adhesive is, wherein the elastic adhesive between the first side of the window element and a formed in the interior of the housing body seat, and is arranged between the circumferential surface and an inner wall of the housing body, and the window member and the elastic adhesive, the housing dustproof, and, preferably, water and / or airtight seal.

The elasticity of the adhesive allows the energy of shock pulses is attenuated to the window member or absorbed. With respect to a preferred embodiment of the window element, in particular with regard to the size, thickness, which defines the distance between the first and the second side of the window element, and the material of the window member and the elasticity of the adhesive embodiments, reference is made to the first aspect of the foregoing. The elastic adhesive contributes to that the connection of the window member is formed flame-proof with the housing body. This is a very simple and economical solution for producing such housing.

Preferably, the housing is formed as a pressure-resistant housing and / or as dust-proof housing. The housing is preferably in the type of protection flameproof enclosure Ex "d" for use in gas-hazardous area and / or in the type of protection provided by enclosures protection Ex "t" for use in hazardous dust region is formed.

Preferably, the elastic adhesive is a silicone-containing elastomer. This brings with it the advantage that it is highly flexible, and resistant in a wide temperature range to a variety of chemicals.

The above position for dust-proof and water and / or air-tight closure also apply to this second aspect of the invention.

Preferably, the housing body has an inner wall in the region of the window element. Between the window element and the inner wall a gap is formed flame-proof. Thus, it is designed such that it prevents the spread of flame of an internal explosion, on the housing wall beyond.

Preferably, the gap in a housing volume of less than 100 cm 3 to a gap length of at least 6 mm and a gap width of 0, 1 mm or less.

In a preferred embodiment, the window member has a cylindrical circumferential surface. The housing body has a correspondingly shaped recess to receive the window member. The formation of the window element as a cylindrical disc and the recess of a circular locating are particularly inexpensive to manufacture. In addition, this shape enables a uniform opening angle of the cone and opening means for receiving electromagnetic radiation.

According to another embodiment the housing body has a first housing part and a second housing part, wherein the first housing part of the window element

includes, and the second housing part is designed for receiving the transmitting or receiving means.

Here, it is preferred that the first housing part is releasably connected by means of a zünddurchschlagssicheren compound reversibly with the second housing part, wherein preferably the flameproof compound, a first connecting element, preferably a male or female thread, to the first housing part and a corresponding second connecting element, preferably a , having internal or external thread on the second housing part.

In a further particularly preferred embodiment, the first housing part is formed with the window element as a removable optics. In case of contamination or wear of the window member, in particular the second side, which faces the exterior of the casing, thus a rapid change by the service personnel is possible, while maintaining the configuration of the housing as pressure-proof housing and / or dust-proof housing.

Among reversible solubility is in this case in particular, that it is possible to nondestructively bring about a variety of separations and reconnections of the connecting means.

In particular for the embodiments with a first and a second housing part, it is advantageous that they have an edge-free, preferably cylindrical outer surface, which serves as a special tool-engaging surface. This embodiment is preferred as a protection against unauthorized opening by means of commonly available multi-edge tools (eg. square, hexagonal etc.) is provided. for loosening and tightening of the compound is preferably a special tool for insertion of the cylindrical pipe and threaded bodies, also referred to as a super-nut, or similar tool is used.

According to a further preferred embodiment, the receiving means for electromagnetic radiation comprising a sensor unit and a Sensorsignalauswerteeinheit. As a sensor unit both an electromagnetic radiation receiving as well as transmitting unit is here understood. Preferably, the sensor unit and Sensorsignalauswerteeinheit are in this case adapted to electromagnetic radiation in the wavelength range 0, 15 μιτι μηη to detect up to 15 °. Sparks and flames radiate characteristic electromagnetic radiation in the wavelength range 0, 15 to 15 μιτι from μιη.

In a further preferred embodiment, the body of the first housing part and / or the second housing part from one of the following materials: metal, preferably stainless steel, ceramic, plastic, fiber reinforced plastic, preferably carbon fiber or fiberglass, or a combination of several of these materials.

Preferably, the inventive housing, the housing body or the first housing part and / or the second housing part are formed as a turned part made of stainless steel. The first cylindrical housing part made of stainless steel is in this case constructed as a setting for the window element having the shape of a cylindrical disk.

Preferably, the inventive housing a free internal volume of a maximum of 100 cm 3 , particularly preferably for a compact construction of a maximum of 10 cm 3 at.

The housing is preferably molded to the reduction of the free volume of the housing partially or completely. In this way, environmental factors such as humidity, aggressive gas atmospheres etc. are held by the internal components inside the housing and reduces the volume of an explosive gas atmosphere.

The first housing part preferably has an inner wall in the region of the window element, and between the window element and the inner wall a gap is formed, which is formed flame-proof. Thus, it is designed such that it prevents the spread of an explosion from the housing interior through the housing wall out to the outside. Preferably, the gap is cylindrical.

The cylindrical gap is formed for this purpose such that it preferably has a minimum length of 6 mm and a maximum gap width of 0, 1 mm.

In a preferred embodiment of the window element is transparent to electromagnetic radiation in the wavelength range of from 0, 15 to 15 μιτι μιτι or in the preferred range of 1 to 6 μητι μιτι. Preferably, the window member is made of sapphire, plastic, borosilicate glass, in particular borosilicate crown glass having a refractive index 7, colored glass, silicon, or quartz glass, or is formed of a combination of several of these materials.

In a further preferred embodiment of the housing body in the region of the window element has a cylindrical cross-section with a cross sectional area A, and a non-covered by the flange of the window element the window surface Ay, which is 80% or more of the cross-sectional area A. This allows a maximum inlet area for the to be coupled into the housing and / or coupled out electromagnetic radiation and a maximum opening angle for the sensor unit. Another advantage of this solution is that the material consumption for the window element is minimized when compared to solutions where the window element through the fixing parts is more covered.

The sensor unit is disposed in the spaced-apart from the second side of the window element to H reception level. The diameter of the area A u and the distance H determine the size of the opening angle a which is greater at a given distance H, the larger the area A u is. It is advantageous that the interior of the housing body and its components are formed inside that after passage of the electromagnetic radiation through the first side of the window element, such unhindered the receiving plane of area A u achieved. According to a preferred embodiment, the opening angle is greater than 90 degrees, or 140 degrees vorzugsweise120.

The signal / power supply in the pressure-resistant housing is preferably formed by means of a cable entry, which is inserted with a flameproof threaded into the housing body, or by means of a suitable bore through a wall of the housing body, which is preferably sealed pressure-tight by casting inside.

The invention is not only reflected in the explosion-proof housing with its individual elements, but also in the modular combination of these individual elements again.

Thus, the invention relates in a third aspect, an explosion-proof housing Kit, with an explosion-proof housing as claimed in one of the preferred embodiments described above with the first housing part and the second housing part, wherein preferably the first housing part comprising the window member, and the second housing part for receiving the transmitting and receiving means is formed and further comprising

one or more further first housing parts are held ready as a removable optics and preferably each of the Incidentally, differently shaped window elements, and / or

- one or more further second housing parts, each of which, preferably the remnant differently shaped, having transmitting and receiving means for electromagnetic radiation and as a removable end units and / or change receiving units held ready.

The preferred embodiments according to the first and third aspects are also preferred embodiments of the second aspect. The preferred embodiments of the first and second aspects are also preferred embodiments of the third aspect. The preferred embodiments of the second and third aspects of the invention are also preferred embodiments of the first aspect of the invention.

The third aspect of the invention, and all variants of embodiment with the configuration of the casing body with the first housing part and the second housing part have that a modular platform concept is provided the advantage, medium whose different first housing parts, which are of the transmissivity and / or the mechanical properties window element are different particularly in terms of the transmitted wavelength can be combined with the second housing parts each having different, the measuring or monitoring task adapted transmitting and / or receiving electromagnetic radiation. Further improve the flexibility and the simplicity of the Auswechseins of these housing parts the Umrüsteffizienz for the service personnel and allow for a rapid assembly of the housing at the mounting location.

A particular advantage of the embodiment in which the first housing part is formed with the window element as a removable optics, the interchangeable lens can be exchanged very flexible and cost-effective in case of soiling or wear of the window element without compromising the dust function or pressure-tightness of the housing. A preferred use is for example in the monitoring of a powdered or particulate material stream, in which just the interchangeable lens particularly stressed and exposed to soiling.

The invention relates in a fourth aspect a method of producing an explosion-proof housing or part of a housing for means for transmitting and / or receiving electromagnetic radiation.

The invention solves the above-described task by the method comprising the steps of:

- producing or providing a housing body which, in particular formed a longitudinal axis, a housing interior for receiving such a transmission and / or reception means, a formed in the interior of the housing body seat for a window member, and has projecting metal edge in the direction of the longitudinal axis of the housing body as chamfer or annular projection,

- manufacturing or providing a window member,

- insertion of the window element into the interior of the housing body on the side of the seat, and

- such that the beaded edge presses crimping the metallic edge of the window element against the seat.

The inventive process is advantageously developed by a prior to the insertion of the window element into the interior of the housing body, preferably sealing element is inserted at the side of the seat elastic, wherein the sealing element by means of beading in sealing contact with the seat on the one hand and the window element on the other hand, brought becomes.

The housing or the housing body is described herein preferably by one of the preferred embodiments of the first or second aspect and formed preferably provided for use in a kit according to the third aspect of the invention.

The invention is described in more detail below with reference to the accompanying figures with reference to several preferred embodiments. show:

Figure 1 is a schematic illustration of an explosion-proof

Housing of a preferred embodiment,

2 shows an enlarged schematic view of a section of the

The housing body of FIG. 1 with the arrangement of the window member with flange,

Figure 3 is a schematic representation of a section of the

The housing body with the arrangement of the window element according to Figures 1 and 2 with an elastic adhesive,

Figure 4 is a schematic representation of a first housing part for a two-piece embodiment of the housing body,

Figure 5 is a schematic representation of the unobstructed window area Ay ,

Figure 6a to 6c shows a schematic overview of an explosion-proof housing kits and

Figure 7 is a schematic representation of a receptacle for the housing.

1 shows an explosion-proof housing to a first preferred embodiment of the invention. The explosion-proof housing includes a housing body 1, which is adapted for receiving means for transmitting and / or receiving electromagnetic radiation 2. Furthermore, the housing has a window member. 5 The window member 5 has two sides, a first side facing the housing interior side 7 and a second opposed, facing away from the housing interior side 6 (s. Fig. 2). The window member 5 is in this embodiment for electromagnetic radiation, preferably μητι in the wavelength range from 1 to 6 μιτι permeable.

A section of the case body shown in Fig. 2. The case body 1 has on the second side 6 of the window member 5 is a flange 1 1 on which is bent inwardly toward the window member 5 and the window member 5 presses in the direction of a seat 13 formed in the interior of the housing so that the housing as is shown in Figure 1 as a pressure-resistant housing and / or as dust-proof housing. The flange 1 1 is preferably in the inventive process of a metal in the direction of a longitudinal axis L extending edge 1 1a (shown in Fig. 2 in dashed lines) have been produced. The edge 1 1a, has been present for example as a taper, as a chamfer or annular projection. Preferably, the edge is bent over 1 1a in a forming process by means of a crimping tool in the direction of the window element. 5 the edge is particularly preferably folded 1 1a by means of cold deformation.

The seat 13 is preferably arranged in this embodiment, as a circumferential support web in the interior of the housing body. 1 Furthermore, Figure 2 shows the configuration of the case of disposing an elastic sealing member 12 between the seat 13 and the first side 7 of the window member 5. The additional or exclusive arrangement of the elastic sealing member 12 between the flange 1 1 and the second side 6 of the window member 5 for further advantageous embodiments is not shown. Here, 1 1 of the housing body 1, the window member 5 and the sealing members 12 are dust-tight manner by means of the flanging, as well as preferably waterproof and airtight, held in contact with each other.

The figure 3 illustrates a detail of the explosion-proof casing according to the second aspect of the invention. The window member 5 has a circumferential surface 8 which extends from the first side 7 to the second side 6 of the window member 5, and by means of an elastic adhesive agent 22 on the housing is attached. The elastic adhesive 22 is disposed between the first side 7 of the window member 5 and a seat 13 formed in the interior of the housing body 1, and between the circumferential surface 8 and an inner housing wall of the housing body. 1 The window member 5 and the elastic adhesive 22 close the housing dustproof, as well as preferably waterproof and airtight.

The case of FIG. 1 is designed in particular as a pressure-resistant housing and / or as dust-proof housing. For this purpose, a gap 9, as formed flame-proof in Fig. 2, which is formed between an inner wall or inner wall 10 of the housing body 1 in the region of the window member 5 and the window member 5. Preferably, the inventive housing a free internal volume of 35 to 45 cm 3 on. The gap 9 preferably has a minimum length of 6 mm and a maximum gap width of 0, 1 mm. The window member 5 is formed as a cylindrical disk, and has a cylindrical circumferential surface and the housing body 1 in accordance with a correspondingly formed cylindrical-shaped recess to receive the window member. 5

As shown in Figure 1, the housing body 1 is preferably formed in two parts. The case body 1 comprises a first housing part 3 and a second housing part 4, which are preferably formed of stainless steel. In the first housing part 3, the window member 5 is disposed. The second housing part 4 is for receiving the Sendebzw. Receiving means 2 adapted for electromagnetic radiation, which preferably has a sensor unit 14 and Sensorsignalauswerteeinheit comprise 15th

The first housing part 3 is, as shown in Fig. 1 and Fig. 6a, preferably by means of a zünddurchschlagssicheren connection 20 (Fig. 6a) is reversibly releasably connected with the second housing part 4. The two housing parts 3, 4 in mutually dissolved state are shown in Fig. 6b and 6c.

The flameproof compound 20 is u by a first connecting element 18 in Fig. 4. Fig. 6b formed as an internal thread on the first housing part 3 and, as a corresponding second connecting element 19, here an external thread on the second housing part 4. The first housing part 3 and the second housing part 4 have an edge-free, cylindrical outer surface. This requires a special tool for opening the housing.

Figure 5 illustrates another preferred embodiment. The case body 1 has in the region of the window member 5 has a cylindrical cross-section with a

Cross-sectional area A on. The unobstructed by the flanging of the window element 1 1 5 window area A u is chosen so that it is 80% or more of the cross-sectional area A. Thus, a large opening angle α is preferably realized by more than 90 degrees and allows a compact design. The sensor unit 14 to the sensor element 21 is disposed spaced at 5 H reception level in the second of the side 6 of the window element.

In the embodiment according to Figure 5, the sensor unit 14 and the Sensorsignalauswerteeinheit 15 (not shown) adapted to detect sparks and / or flame. The sensor unit 14 is arranged for this purpose to detect electromagnetic radiation in the range of 0, 15 to 15 μιτι μιτι.

Preferably, the window member 5 is accordingly permeable to electromagnetic radiation in the wavelength range from 1 to 6 μητι μιτι and is preferably made of sapphire.

In Figure 6 (6a to 6c) is a schematic of the third aspect of the invention, an explosion-proof housing illustrated kit. It comprises in this embodiment one or more explosion-proof housing in two-piece embodiment of the housing body 1 with a first housing part 3 and a second housing part 4, which by means of the zünddurchschlagssicheren Compound 20 (s. Fig. 1 and Fig. 6a) are reversibly releasably connected with each other. The housing further includes a plurality kit as interchangeable lenses formed first casing parts 3, which are kept in this modular concept. In Fig. 6a to 6c are exemplary three thereof housing parts 3a, 3b and 3c. The first housing parts 3a and 3b have an identical window member 5, with the same transmission properties for electromagnetic radiation. In case of contamination or wear, the interchangeable lens 3a can be replaced by the interchangeable lens 3b, as the ignition spark resistant compound 20 is reversibly detachable. Thus, the interchangeable lens can be replaced quickly and flexibly, while keeping the configuration of the housing as pressure-proof housing and / or dust-proof housing.

Preferably, housing parts 3c respectively to the rest of the housing parts differently shaped window elements are held ready as interchangeable lenses. The explosion-proof housing kit preferably further comprises a plurality of second housing parts 4, in the illustrated embodiment are only 4a and 4c (s. Fig. 6a to 6c). These preferably have the rest of the housing parts 4, differently designed, transmitting and receiving means 2, here preferably 2a (s. Fig. 6b) and 2b (s. Fig. 6c) for electromagnetic radiation. These housing parts 4, 4a, 4c can be by means of the reversibly separable zünddurchschlagssicheren Compound 20 (s. Fig. 1 and Fig. 6a), if necessary, replace or by the measurement task due to during the installation to the corresponding first housing portions 3, 3a, 3c combine. The housing parts 4, z. B. 4a and 4c are kept ready in this modular concept as a removable end units and / or change receiving units.

In Fig. 6a, a further preferred embodiment of the housing is illustrated. To the housing body 1, in particular on the second housing part 4 of the housing body 1, a number of projections 23 is formed. In the illustrated embodiment, three protrusions 23 are evenly distributed over the circumference of the housing body 1 and the second housing part. 4 The projections 23 are adapted to engage in corresponding sliding guides 24 of a bayonet lock. With the aid of the projections 23 the housing can be efficiently captive in a receptacle 25 provided for this purpose, as shown in Fig. 7, to install the receptacle having 25, the sliding guides 24 for the projections 23. Alternatively, the number of projections 23 in other preferred embodiments, the first housing part 3 (not shown) is formed. Also, a one-piece housing body 1 may have a corresponding number of projections 23 on its peripheral surface. In a preferred embodiment, the receptacle 25 is fixed to the object to be protected and aligned to the area to be protected, that detected after the introduction of the housing body 1 into the receptacle 25, the opening angle α to the area to be protected.

As is apparent from the above embodiments has been presented with the present invention, an explosion proof housing for means for transmitting and / or receiving electromagnetic radiation and a housing kit. The simplicity of the flameproof connection of the window element to the housing, and the standardization of the first and second housing parts which are combined into a flexible and adapted for quick and flexible replacement for maintenance and service work, allowing a cost reduction in the manufacture of the components and significantly reduced costs maintenance and service without compromising the protective function of the housing.

LIST OF REFERENCES

I housing body

2, 2a, 2b transmit and / or receive electromagnetic radiation

, Preferably formed 3, 3a, 3b, 3c, first housing part as an interchangeable optics

4, 4a, 4c second housing part

5 window element

6 Second side of the window element (facing away from the interior of the housing)

7 first page of the window element (the housing interior facing)

8 peripheral surface, preferably cylindrical lateral surface of the

Window Elements 5

9 gap

10 inner wall or inner wall of the housing body 1

II flanging

1 1a metallic edge

12 elastic sealing member

13 seat

14 Sensor unit

15 Sensorsignalauswerteeinheit

First connecting member 18

19 second connecting member

Flameproof 20 connecting the first housing part (3, 3a, 3b,

3c) with the second housing part (4, 4a, 4c)

21 sensor element and / or sensor array

22 Elastic adhesive

23 projections on the housing body

A cross-sectional area of ​​the housing body 1 in the region of the

Window Elements 5

Au Free unobstructed surface of the window element 5

L longitudinal axis

claims
1. Explosion-proof housing for means for transmitting and / or receiving electromagnetic radiation (2, 2a, 2b), with
- a case body (1) for receiving such transmitter and / or receiver means (2, 2a, 2b) is arranged, and
- facing a window element (5) having a first, the housing interior
Side (7) and an opposing second facing away from the housing interior side (6), said window element (5) is transparent to electromagnetic radiation,

characterized, in that

the housing body (1) on the second side (6) of the window element (5) has a flange (1 1), which presses the window member (5) toward a formed in the interior of the housing seat (13), so that the housing as pressure-proof housing and / or is formed as a dust-proof housing.

2. Housing according to claim 1,

wherein between the seat (13) and the first side (7) of the window element (5) and / or between the flange (1 1) and the second side (6) of the window element (5) comprises an elastic sealing element (12) is arranged, wherein the housing body (1), the window element (5), and the one or more sealing elements (12) by means of the flange (1: 1) dust-proof, and preferably water and / or air tight, are held in contact with each other.

3. A housing according to the preamble of claim 1 or according to claim 1,

characterized, in that

the window element (5) having a peripheral surface (8) extending from the first side (7) to the second side (6), and means of an elastic adhesive (22) is fixed to the housing, wherein

the elastic adhesive (22) between the first side (7) of the window element (5) and an inside of the housing body (1) formed seat (13), and between the peripheral surface (8) and an inner wall (10) of the housing body ( 1) is arranged, and

the window element (5) and the elastic adhesive (22) housing dust-proof and preferably water and airtight seal.

4. Housing according to one of the preceding claims,

wherein the housing body (1) having an inner wall (10) in the region of the window element (5), and a gap (9) is formed between the flame-proof window element (5) and the inner wall (10).

5. Housing according to one of the preceding claims,

wherein the window element (5) has a cylindrical peripheral surface (8), and the housing body (1) has a correspondingly shaped recess for receiving the window element (5).

6. Housing according to one of the preceding claims,

wherein the housing body (1) has a first housing part (3, 3a, 3b, 3c) and a second housing part (4, 4a, 4c), wherein the first housing part (3, 3a, 3b, 3c) comprises the window member (5) is formed, and the second housing part (4, 4a, 4c) for receiving the transmitting or receiving means (2).

7. The housing of claim 6,

wherein the first housing part (3, 3a, 3b, 3c) by means of a zünddurchschlagssicheren compound (20) reversibly releasably connected with the second housing part (4, 4a, 4c) is connected.

8. The housing of claim 7,

wherein the flameproof joint (20) comprises a first connecting element (18), preferably an internal or external thread, to the first housing part (3, 3a, 3b, 3c) and a corresponding second connecting element (19), preferably a male or female thread, on the second housing part (4, 4a, 4c).

9. Housing according to one of claims 6 to 8,

wherein have the first housing part (3, 3a, 3b, 3c) and / or the second housing part (4, 4a, 4c) an edge-free, preferably cylindrical outer surface.

10. Housing according to one of the preceding claims,

wherein comprising transmitting and receiving means for electromagnetic radiation (2, 2a, 2b), a sensor unit (14) and Sensorsignalauswerteeinheit (15).

1 1. The housing of claim 10, wherein the sensor unit (14) and Sensorsignalauswerteeinheit (15) are adapted to electromagnetic radiation in the wavelength range 0.15 to 15 μιτι to detect μιτι.

12. Housing according to one of the preceding claims,

wherein the body of the first housing part (3, 3a, 3b, 3c) and / or the second housing part (4, 4a, 4c) comprises one of the following materials: metal, preferably stainless steel, ceramic, plastic, fiber reinforced plastic, preferably carbon fiber or GRP, or a combination of several of these materials.

13. Housing according to one of the preceding claims,

wherein the window element (5) is transparent to electromagnetic radiation in the wavelength range of 0, 15 μιτι to 15 μιτι or in the range of 1 μητι to 6 μιτι, and preferably made of sapphire, plastic, borosilicate glass, in particular borosilicate crown glass having a refractive index 7, colored glass , silicon, or quartz glass, or a combination of several of these materials is formed.

14. Housing according to one of the preceding claims,

wherein the housing body (1) in the region of the window element (5) has a cylindrical cross-section with a cross sectional area (A), and one of the flange (1 1) of the window element (5) unobstructed window area (Au) 80% or more of the cross sectional area ( A).

15. Explosion-proof enclosure kit with

a housing according to one of claims 6 to 14,

one or more further first housing parts (3, 3a, 3b, 3c), which is held ready as a removable optics and preferably each of the Incidentally, differently shaped window elements, and / or

one or more further second housing parts (4, 4a, 4c), respectively, preferably to the remnant differently designed, Sendebzw. Receiving means (2, 2a, 2b) comprise electromagnetic radiation, and are held ready as a removable end units and / or change receiving units.

16. A process for producing an explosion-proof housing or part of a housing for means for transmitting and / or receiving electromagnetic radiation (2, 2a, 2b), comprising the steps of:

Producing or providing a housing body (1) having a longitudinal axis (L), a housing interior for receiving such transmitter

and / or receiving means (2, 2a, 2b), formed an inside of the housing body (1) seat (13) for a window element (5), and one in the direction of the longitudinal axis of the housing body (1) has projecting metal edge, in particular formed as a chamfer or annular protrusion, making or providing a window element (5),

Insertion of the window element (5) into the interior of the housing body (1) on the side of the seat (13), and

Crimping the metallic edge so that the flanged edge presses the window element against the seat (13).

17. A method according to claim 16,

wherein prior to the insertion of the window element (5) into the interior of the housing body (1), preferably elastic sealing element (12) on the side of the seat (13) is inserted, and wherein the sealing element (12) by means of beading in sealing engagement with the seat (13) on the one hand and the window element (5) on the other hand placed.