CN217985167U

CN217985167U - Image acquisition device

Info

Publication number: CN217985167U
Application number: CN202221264886.7U
Authority: CN
Inventors: 陈养团; 曾雪峰; 靳东兴; 陈仁
Original assignee: Beijing Watman Intelligent Technology Co ltd
Current assignee: Beijing Watman Intelligent Technology Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-12-06
Anticipated expiration: 2032-05-24

Abstract

The utility model belongs to the technical field of image acquisition, specifically, relate to an image acquisition equipment. The image acquisition device comprises a housing, a purge flange, a camera, and a protective lens. A shell cavity is arranged in the shell, and the axial inner end of the shell is provided with an opening to be communicated with the shell cavity; the axial inner end of the purging flange is connected with the axial inner end of the shell and is provided with an air inlet, the axial outer end of the purging flange is provided with an air blowing channel communicated with the air inlet, and the purging flange is provided with a lighting channel which is arranged in a penetrating way along the axial direction; the camera is arranged in the shell cavity and comprises a lens, and the lens is arranged towards the lighting channel; the protective lens is arranged in the lighting channel to seal the shell cavity; wherein, the air blowing channel comprises an inner air blowing opening which is communicated with the lighting channel and faces the protective lens. Through the utility model provides an image acquisition equipment can avoid appearing the camera and lead to the unclear problem of image data because of dust pollution camera lens.

Description

Image acquisition device

Technical Field

The utility model belongs to the technical field of image acquisition, specifically, relate to an image acquisition equipment.

Background

With increasing degrees of automation, in industrial environments cameras are often used for identification or monitoring. In a working environment where a large amount of dust floats, the dust accumulates on the lens of the camera with the passage of time, resulting in unclear image data acquired by the camera.

SUMMERY OF THE UTILITY MODEL

The above-mentioned defect or not enough to prior art, the utility model provides an image acquisition equipment avoids appearing the camera and leads to the unclear problem of image data because of dust pollution camera lens.

In order to achieve the above object, the utility model provides an image acquisition device, this image acquisition device includes:

the shell is internally provided with a shell cavity, and the axial inner end of the shell cavity is provided with an opening to be communicated with the shell cavity;

the axial inner end of the purging flange is connected with the axial inner end of the shell and is provided with an air inlet, the axial outer end of the purging flange is provided with an air blowing channel communicated with the air inlet, and the purging flange is provided with a lighting channel which is arranged in a penetrating way along the axial direction;

the camera is arranged in the shell cavity and comprises a lens, and the lens is arranged towards the lighting channel; and

the protective lens is arranged in the lighting channel to seal the shell cavity;

wherein, the air blowing channel comprises an inner air blowing opening which is communicated with the daylighting channel and faces the protective lens.

Optionally, the image acquisition device further comprises a light supplement lamp, the light supplement lamp is located on the circumferential outer side of the blowing flange, and the blowing channel further comprises an outer blowing port facing the light supplement lamp.

Optionally, the air blowing channel comprises a plurality of inner air blowing openings, a plurality of outer air blowing openings and an annular main air channel, the annular main air channel is communicated with the air inlet, the plurality of inner air blowing openings are uniformly arranged on the inner peripheral wall of the blowing flange at intervals in the circumferential direction and are communicated with the annular main air channel, and the plurality of outer air blowing openings are uniformly arranged on the outer peripheral wall of the blowing flange at intervals in the circumferential direction and are communicated with the annular main air channel.

Optionally, the purge flange further comprises:

the flange comprises a flange body, wherein an annular main air groove, a plurality of outer air blowing grooves and a plurality of inner air blowing grooves are formed in the axial outer end of the flange body, the axial inner end of the flange body is connected with the axial inner end of the shell and is provided with an air inlet, the air inlet is communicated with the annular main air groove, the plurality of outer air blowing grooves are uniformly arranged on the inner peripheral wall of the flange body at intervals along the circumferential direction and are communicated with the annular main air groove, and the plurality of inner air blowing grooves are uniformly arranged on the outer peripheral wall of the flange body at intervals along the circumferential direction and are communicated with the annular main air groove; and

and the flange end cover is connected to the outer side of the axial outer end of the flange body and covers the annular main air groove, the outer blowing groove and the inner blowing groove to form an annular main air channel, an outer blowing port and an inner blowing port.

Optionally, each inner blowing groove and each outer blowing groove are horizontally arranged in an inclined manner relative to the radial direction of the flange body.

Optionally, a flange inner air passage axially penetrating the flange body is arranged on the circumferential wall of the flange body, an axial inner end of the flange inner air passage is an air inlet, an axial outer end of the flange inner air passage is an air outlet, and the air outlet is connected with the annular main air groove.

Optionally, the number of the inner blowing openings and the number of the outer blowing openings are both 6 to 10.

Optionally, an inner air pipe joint is arranged on the air inlet, an outer air pipe joint is arranged on the outer axial end of the shell, and the inner air pipe joint is connected with the outer air pipe joint through an air pipe.

Optionally, the image acquisition device further comprises a light supplement lamp mounting ring plate, the light supplement lamp mounting ring plate is sleeved on the axial inner end of the blowing flange, and the light supplement lamp is mounted on the light supplement lamp mounting ring plate.

Optionally, the image capturing device further includes a camera mount disposed in the housing cavity, the camera mount being connected to an axially inner end of the purge flange and configured to fixedly mount the camera.

The utility model discloses in, the camera among this image acquisition equipment is not directly exposed in dust environment, thereby the camera lens of camera can see through daylighting passageway and protective glass piece and gather image data. Particularly, the air inlet on the axial inner end of the blowing flange can be connected with a high-pressure air source, so that high-pressure air is introduced into the air blowing channel on the axial outer end and blown to the protective lens through the inner air blowing port, the protective lens is prevented from being infected with excessive dust, and the definition of image data collected by the camera is ensured.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of an image capturing device according to an embodiment of the present invention;

FIG. 2 is an exploded view of the image capture device of FIG. 1;

FIG. 3 is a partial cross-sectional view of the image capture device of FIG. 1;

FIG. 4 is a schematic view of the image capture device of FIG. 1 with the flange end cap removed;

FIG. 5 is an enlarged view taken at A in FIG. 4;

fig. 6 is a schematic view of the image capturing apparatus of fig. 1 with the housing removed.

Description of reference numerals: 10. a housing; 11. a shell cavity; 12. an outer gas pipe joint; 20. blowing the flange; 21. a light collecting channel; 22. an air inlet; 23. an air blowing channel; 231. an inner air blowing opening; 232. an outer blow port; 233. an annular main air passage; 24. a flange body; 241. an inner air blowing groove; 242. an external blowing tank; 243. an annular main gas tank; 25. a flange end cover; 26. an inner gas pipe joint; 27. a flange inner air passage; 28. an air outlet; 30. a camera; 31. a lens; 40. protecting the lens; 50. a light supplement lamp; 60. a light supplement lamp mounting ring plate; 70. a camera support; 80. a cable.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the description herein is only intended to illustrate and explain embodiments of the present invention, and is not intended to limit embodiments of the present invention.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the embodiments of the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, top, bottom" and "upper" are generally used with respect to the orientation shown in the drawings or the positional relationship of the components with respect to each other in the vertical, vertical or gravitational direction.

The invention will be described in detail below with reference to the accompanying drawings in conjunction with exemplary embodiments.

Fig. 1 is a schematic diagram of an image capturing device according to an embodiment of the present invention. Fig. 2 is an exploded schematic view of the image capturing apparatus of fig. 1. Fig. 3 is a partial sectional view of the image pickup device of fig. 1. As shown in fig. 1 to 3, an exemplary embodiment of the present invention provides an image capturing apparatus including a housing 10, a purge flange 20, a camera 30, and a protective lens 40. A shell cavity 11 is arranged in the outer shell 10, and the axial inner end of the shell cavity is opened to be communicated with the shell cavity 11. The axial inner end of the purging flange 20 is connected with the axial inner end of the shell 10 and is provided with an air inlet 22, the axial outer end is provided with an air blowing channel 23 communicated with the air inlet 22, and the purging flange 20 is provided with a lighting channel 21 which is arranged in a penetrating way along the axial direction. The camera 30 is disposed in the housing 11 and includes a lens 31, and the lens 31 is disposed toward the light-collecting channel 21. The protective lens 40 is disposed in the light-collecting channel 21 to seal the housing cavity 11. Wherein, the air blowing channel 23 comprises an inner air blowing opening 231 which is communicated with the lighting channel 21 and faces the protective lens 40.

Specifically, the axially inner end of the housing 10 is provided in an open manner, so that the camera 30 can be mounted in the housing cavity 11 from the axially inner end of the housing 10. The axial inner end of the purging flange 20 is connected to the axial inner end of the housing 10 and the light-collecting channel 21 is provided with a protective lens 40, so as to seal the housing cavity 11 and prevent the camera 30 from being directly exposed to dust. The lens 31 of the camera 30 is capable of collecting image data through the light-collecting passage 21 and the protective lens 40.

In particular, the air inlet 22 on the axial inner end of the blowing flange 20 can be connected to a high-pressure air source, so that high-pressure air is introduced into the air blowing channel 23 on the axial outer end and blown to the protection lens 40 through the inner air blowing port 231, thereby preventing the protection lens 40 from being contaminated by excessive dust and ensuring the definition of image data collected by the camera 30.

In this embodiment, the protective lens 40 is preferably a high-definition lens, which ensures that the camera 30 can acquire clear image data.

It should be noted that after the image capturing device is connected to the high-pressure air source, the air may be continuously blown toward the protective lens 40, or intermittently blown toward the protective lens 40 at a fixed or unfixed time, so as to ensure the definition of the image data captured by the camera 30. It can be understood by those skilled in the art that the high-pressure gas source is connected to the image acquisition device through a gas pipeline, an electrically controlled switch valve is disposed on the gas pipeline, and the blowing mode can be changed through the electrically controlled switch valve, which will not be described in detail herein.

In order to further improve the cleaning degree of the image data collected by the camera 30, further, the image collecting device further includes a light supplement lamp 50, the light supplement lamp 50 is located on the circumferential outer side of the blowing flange 20, and the blowing channel 23 further includes an outer blowing port 232 facing the light supplement lamp 50.

Specifically, the light supplement lamp 50 and the lens 31 can be pointed to the object to be recognized or monitored at the same time by adjusting the position of the image acquisition device, and the object to be recognized or monitored is clearer due to the light supplement lamp 50, so that the object can be recognized by the camera more easily.

It is understood that the fill light 50 may also accumulate dust to affect brightness, thereby causing insufficient light to be irradiated on an object to be recognized or monitored. In this embodiment, in particular, the air blowing channel 23 further includes an external air blowing opening 232, and after the high-pressure gas is introduced into the air blowing channel 23, the dust on the light supplement lamp 50 can be blown off through the external air blowing opening 232, so as to ensure the brightness of the light supplement lamp 50.

In the illustrated embodiment, the fill light lamp 50 is an annular lamp, and it can be understood that the fill light lamp 50 is also a plurality of strip lamps, and the strip lamps are uniformly spaced along the circumference of the blowing flange 20. In other words, the fill light 50 is not limited to the illustrated embodiment.

The utility model discloses an in the embodiment, image acquisition equipment still includes light filling lamp installation crown plate 60, and light filling lamp installation crown plate 60 overcoat is served in the axial of sweeping flange 20, and light filling lamp 50 is installed on light filling lamp installation crown plate 60.

As shown in fig. 2, in the illustrated embodiment, an outer edge ear plate extends outward along the circumferential direction from the axial inner end of the purging flange 20, the outer edge ear plate is connected to the circumferential wall of the housing 10, the purging flange 20 passes through the light supplement lamp mounting ring plate 60 and is mounted on the outer edge ear plate, and then the light supplement lamp 50 is mounted on the light supplement lamp mounting ring plate 60, so that the light supplement lamp 50 can be fixed on the circumferential outer side of the purging flange 20.

The utility model discloses an in the embodiment, the gas blowing channel 23 includes a plurality of interior gas blowing openings 231, a plurality of outer gas blowing openings 232 and annular main gas duct 233, annular main gas duct 233 communicates with air inlet 22, a plurality of interior gas blowing openings 231 along the even interval arrangement of circumference on the internal perisporium that sweeps flange 20 and all communicate annular main gas duct 233, a plurality of outer gas blowing openings 232 along the even interval arrangement of circumference on the periphery wall that sweeps flange 20 and all communicate annular main gas duct 233.

Specifically, the section defined by the inner peripheral wall of the purge flange 20 is the light passage 21, in other words, the protective lens 40 is located within the section defined by the inner peripheral wall of the purge flange 20. After the gas introduced from the gas inlet 22 passes through the annular main gas passage 233, the gas is distributed through the plurality of inner blowing ports 231 distributed along the circumferential direction at uniform intervals to uniformly blow the protective lens 40, and the gas is distributed through the plurality of outer blowing ports 232 distributed along the circumferential direction at uniform intervals to uniformly blow the supplementary lighting lamp 50, so that the dead angle of blowing is reduced.

In order to ensure the structural strength of the axially outer end of the purging flange 20 and the purging effect, the number of the blowing openings is appropriate, and preferably, the number of the inner blowing openings 231 and the number of the outer blowing openings 232 are both 6 to 10.

It is understood that the purge flange 20 may be formed integrally or may be formed in a separate design. Because the inside air flue that is formed with of flange 20 sweeps, it is difficult to realize through integrated into one piece's technical scheme, in order to reduce the processing degree of difficulty, practices thrift the cost, sweeps flange 20 and preferably adopts split type design. Fig. 4 is a schematic view of the image capturing apparatus of fig. 1 after a flange end cover is removed. Fig. 5 is an enlarged view of a portion a in fig. 4. As shown in fig. 4 and 5, the purge flange 20 further includes a flange body 24 and a flange cover 25.

An annular main air groove 243, a plurality of outer air blowing grooves 242 and a plurality of inner air blowing grooves 241 are formed in the axial outer end of the flange body 24, the axial inner end is connected with the axial inner end of the shell 10 and is provided with an air inlet 22, the air inlet 22 is communicated with the annular main air groove 243, the plurality of outer air blowing grooves 242 are uniformly arranged on the inner peripheral wall of the flange body 24 at intervals along the circumferential direction and are communicated with the annular main air groove 243, and the plurality of inner air blowing grooves 241 are uniformly arranged on the outer peripheral wall of the flange body 24 at intervals along the circumferential direction and are communicated with the annular main air groove 243; and

the flange cover 25 is attached to the outside of the axially outer end of the flange body 24 and covers the annular main air groove 243, the outer blow groove 242, and the inner blow groove 241 to form the annular main air passage 233, the outer blow port 232, and the inner blow port 231.

As shown in fig. 5, fig. 5 is a schematic view of the axial outer end of the flange body 24, and the annular main air groove 243, the outer blowing groove 242 and the inner blowing groove 241 can be directly machined on the axial outer end of the flange body 24 by a tool.

In the embodiment shown in fig. 5, the flange body 24 is provided with screw holes at the axially outer end thereof, and the flange cover 25 is fixedly mounted on the flange body 24 by screws, thereby forming the annular main air passage 233, the outer blow ports 232, and the inner blow ports 231. Obviously, compared with the blowing flange 20 formed integrally, the present embodiment is easier to process and saves cost by adopting a split design.

In the embodiment of the present invention, the peripheral wall of the flange body 24 is provided with an inner flange air passage 27 axially extending through the flange, the inner axial end of the inner flange air passage 27 is the air inlet 22, the outer axial end is the air outlet 28, and the air outlet 28 is connected to the main annular air groove 243. Specifically, the annular main air groove 243 is connected to a high-pressure air source through the flange inner air passage 27, and the high-pressure air passes through the flange inner air passage 27, the annular main air groove 243, and the air outlet groove in this order, in other words, the flange inner air passage 27, the annular main air groove 243, and the air outlet groove are formed as air passages on the flange body 24.

Of course, the number of the flange internal air passages 27 is not limited to 1, and the number of the flange internal air passages 27 may be appropriately adjusted according to the situation.

As mentioned above, the blowing flange 20 is formed with the light collecting channel 21, and in this embodiment, the flange end cover 25 is annular, so as not to obstruct the light collecting view of the camera 30.

In an alternative embodiment, each inner blowing groove 241 and each outer blowing groove 242 are disposed along a radial direction of the flange body 24. So set up, the gas blowout direction of each interior gas groove 241 intersects in the axial direction of gas flange body 24, thereby each air current offsets each other and leads to the air current of the axial direction department of flange body 24 less, secondly, easily forms the dead angle that is difficult to sweep between two adjacent interior gas grooves 241, and in the same way, also can form the dead angle between two adjacent outer gas grooves 242, so sweep the effect general.

In another alternative embodiment, each of the inner blowing grooves 241 and each of the outer blowing grooves 242 are horizontally inclined with respect to the radial direction of the flange body 24. Obviously, the gas jetting directions of the inner blowing grooves 241 do not intersect with the axial center of the flange body 24, so that an air vortex is more easily formed; secondly, the dead angle formed between two adjacent inner blowing grooves 241 and the dead angle formed between two adjacent outer blowing grooves 242 are smaller, and therefore, compared with the above embodiment, the blowing effect of the present embodiment is better.

In an alternative embodiment, a gas line to which a high pressure gas source is connected is inserted directly into the gas inlet 22 after passing through the housing 10, so that the introduction of the high pressure gas into the purge flange 20 is achieved.

In an alternative embodiment, the air inlet 22 is provided with an inner air fitting 26, the outer air fitting 12 is provided on the axially outer end of the housing 10, and the inner air fitting 26 is connected to the outer air fitting 12 by an air tube (not shown).

Specifically, after the gas line to which the high pressure gas source is connected to the outer gas fitting 12, the high pressure gas is introduced to the purge flange 20 through the inner gas fitting 26 and the gas line on the outer gas fitting 12. Compare in above-mentioned embodiment, the image acquisition equipment can realize dismantling fast with the gas line that is connected with high pressurized air source and connects, the follow-up maintenance of being convenient for.

As shown in fig. 1 and 2, in the illustrated embodiment, a cable 80 connected to the camera 30 is further provided on the axially outer end of the housing 10, and the cable 80 is used for data transmission and for supplying power to the camera 30. In the embodiment shown in fig. 2, the flange inner air duct 27 is a threaded hole, and the inner air duct joint 26 is screwed with the flange body 24.

In the embodiment of the present invention, the image capturing device further includes a camera bracket 70 disposed in the shell cavity 11, and the camera bracket 70 is connected to the axial inner end of the purging flange 20 and is used for fixedly mounting the camera 30.

Fig. 6 is a schematic diagram of the image capturing device in fig. 1 with the housing removed. As shown in fig. 6, in the illustrated embodiment, the camera holder 70 has a door-like shape, the camera 30 is inserted into the camera holder 70 in a state where the lens 31 faces the light collection passage 21, and the camera holder 70 is attached to the axial inner end of the purge flange 20 to fix the camera 30 in the housing cavity 11.

It should be noted that the camera stand 70 is not limited to the illustrated embodiment. The mounting manner of the camera 30 is also not limited to the mounting manner by the camera mount 70, and for example, the inner peripheral wall of the housing 10 projects inward in the circumferential direction of the camera mounting ear plate on which the camera 30 can be mounted.

In the above embodiment, the axial inner end and the axial outer end of the housing 10 and the axial inner end and the axial outer end of the purge flange 20 are determined based on the camera 30, and the axial end close to the camera 30 is the inner end, and the axial end far from the camera 30 is the outer end.

The above describes in detail optional implementation manners of embodiments of the present invention with reference to the accompanying drawings, however, the embodiments of the present invention are not limited to the details in the above implementation manners, and in the technical concept scope of the embodiments of the present invention, it is possible to perform various simple modifications on the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

It should be noted that, in the above-mentioned embodiments, the various technical features described in the above-mentioned embodiments can be combined in any suitable way without contradiction, and in order to avoid unnecessary repetition, the embodiments of the present invention do not separately describe various possible combinations.

In addition, various different implementation manners of the embodiments of the present invention can be combined arbitrarily, and as long as it does not violate the idea of the embodiments of the present invention, it should be considered as the disclosure of the embodiments of the present invention.

Claims

1. An image capturing apparatus characterized in that the image capturing apparatus comprises:

the shell (10) is internally provided with a shell cavity (11), and the axial inner end of the shell cavity is arranged in an opening manner to be communicated with the shell cavity (11);

the axial inner end of the purging flange (20) is connected with the axial inner end of the shell (10) and is provided with an air inlet (22), the axial outer end of the purging flange is provided with an air blowing channel (23) communicated with the air inlet (22), and the purging flange (20) is provided with a lighting channel (21) which is arranged in a penetrating way along the axial direction;

a camera (30) disposed within the housing cavity (11) and including a lens (31), the lens (31) disposed toward the light-collecting channel (21); and

a protective lens (40) arranged in the light-collecting channel (21) to seal the shell cavity (11);

wherein, the air blowing channel (23) comprises an inner air blowing opening (231) which is communicated with the lighting channel (21) and faces the protective lens (40).

2. The image capturing device according to claim 1, characterized in that the image capturing device further comprises a fill light (50), the fill light (50) being located circumferentially outside the purging flange (20), the air blowing channel (23) further comprising an outer air blowing opening (232) facing the fill light (50).

3. The image capturing apparatus according to claim 2, wherein the air blowing duct (23) includes a plurality of the inner air blowing openings (231), a plurality of the outer air blowing openings (232), and an annular main air duct (233), the annular main air duct (233) communicates with the air inlet (22), the plurality of inner air blowing openings (231) are circumferentially arranged on an inner peripheral wall of the purge flange (20) at regular intervals and all communicate with the annular main air duct (233), and the plurality of the outer air blowing openings (232) are circumferentially arranged on an outer peripheral wall of the purge flange (20) at regular intervals and all communicate with the annular main air duct (233).

4. The image acquisition apparatus according to claim 3, wherein the purge flange (20) further comprises:

the flange comprises a flange body (24), wherein an annular main air groove (243), a plurality of outer air blowing grooves (242) and a plurality of inner air blowing grooves (241) are formed in the axial outer end of the flange body (24), the axial inner end of the flange body is connected with the axial inner end of the shell (10) and provided with the air inlet (22), the air inlet (22) is communicated with the annular main air groove (243), the plurality of outer air blowing grooves (242) are uniformly arranged on the inner peripheral wall of the flange body (24) at intervals along the circumferential direction and communicated with the annular main air groove (243), and the plurality of inner air blowing grooves (241) are uniformly arranged on the outer peripheral wall of the flange body (24) at intervals along the circumferential direction and communicated with the annular main air groove (243); and

and a flange cover (25) which is connected to the outside of the axial outer end of the flange body (24) and covers the annular main air groove (243), the outer blowing groove (242) and the inner blowing groove (241) to form the annular main air passage (233), the outer blowing port (232) and the inner blowing port (231).

5. The image capturing apparatus according to claim 4, wherein each of the inner blowing grooves (241) and each of the outer blowing grooves (242) are horizontally inclined with respect to a radial direction of the flange body (24).

6. The image acquisition device according to claim 4, wherein a flange inner air passage (27) is axially arranged on the peripheral wall of the flange body (24) in a penetrating manner, the axial inner end of the flange inner air passage (27) is the air inlet (22), the axial outer end is an air outlet (28), and the air outlet (28) is connected with the annular main air groove (243).

7. The image capturing apparatus according to claim 3, characterized in that the number of the inside air blowing ports (231) and the number of the outside air blowing ports (232) are each 6 to 10.

8. The image capturing device according to claim 1, characterized in that an inner air pipe connection (26) is provided on the air inlet (22), an outer air pipe connection (12) is provided on an axially outer end of the housing (10), and the inner air pipe connection (26) is connected to the outer air pipe connection (12) by an air pipe.

9. The image capturing device according to claim 2, further comprising a fill-in lamp mounting ring plate (60), wherein the fill-in lamp mounting ring plate (60) is sleeved on an axially inner end of the blowing flange (20), and the fill-in lamp (50) is mounted on the fill-in lamp mounting ring plate (60).

10. The image acquisition device according to any one of claims 1 to 9, further comprising a camera mount (70) disposed within the housing cavity (11), the camera mount (70) being connected to an axially inner end of the purge flange (20) and being configured to fixedly mount the camera (30).