KR102458430B1 - Pollution prevention device for observation camera exposed to polluted environment - Google Patents

Abstract

The apparatus for preventing contamination of the view of the observation camera exposed to the polluted environment according to the present invention includes: a base member on which a see-through window is installed; a sub-housing installed on the lower surface of the base member and having a first through-hole corresponding to the see-through window; and a sealing gas supply unit installed in the sub-housing to communicate with the inner space of the sub-housing and supplying a sealing gas to the inside of the sub-housing; It is installed inside the sub-housing to form a multi-stage decompression distribution unit for lowering the pressure of the sealing gas supplied from the sealing gas supply unit, and the sealing gas decompressed by the decompression distribution unit is transferred to the space between the see-through window and the first through hole. and a sealing gas distribution unit for supplying to the air to block the inflow of contaminated gas.

Description

Pollution prevention device for observation camera exposed to polluted environment

The present invention relates to an apparatus for preventing pollution of a camera, and more particularly, by forming a small amount of static pressure at a predetermined interval from a lens of a camera exposed to a contaminated environment or a viewing window for protecting the same, so that movement of gas is minimized. It relates to a pollution prevention device for an observation camera exposed to a polluted environment that can block substances.

In general, optical mechanical lenses such as pyrometers, CCD cameras, and HMDs must be kept clean in order to acquire a clear image, and the cleanliness of the lenses is greatly affected by the surrounding environment. In particular, lenses of optical machines installed in high-temperature and high-humidity atmospheres or production facilities that generate a lot of dust cause various problems by being contaminated by moisture or dust. In particular, in the case of an optical machine requiring precise measurement, the precision is lowered.

CCD cameras are used for observation of equipment, plating status, and meandering of hot-rolled materials for snouts, heating furnaces, iron making facilities, and pollution source tanks of plating facilities, and optical machinery and image acquisition. It is essential to secure a technology for preventing contamination of lenses of optical machines or cameras installed in such production facilities.

In Republic of Korea Registered Utility Model No. 20-0217674, a dust penetration prevention structure for protecting the lens of an optical machine is posted. The dust penetration prevention structure for protecting the posted lens surrounds the lens tip area of the optical machine with a hollow hood, and an air conductor whose inner diameter gradually increases toward the bottom is mounted inside the hood, and the circumference is at the top of the hood. The first high-pressure air inlet line for purging the high-pressure air in the direction is connected, and a ring-type air purge tube in which a plurality of injection holes directed toward the center of the hood are formed along the circumferential direction at the lower end of the hood. have

However, the conventional method of injecting high-pressure air through a ring-shaped air purge tube having an injection hole toward the center of the larynx causes the surrounding contaminated air to move to the lens side while riding on the injected air, thereby contaminating the lens. There is this.

In particular, since the air injected through the air purge pipe and the contaminated gas moving by riding on it contain moisture, there is a problem in that dust and foreign substances are attached to the window or lens by moisture, thereby aggravating the contamination.

In addition, Korean Patent Publication No. 2014-0069928 discloses a system for removing contaminants from a CCTV camera, and Korean Patent No. 10-1006045 discloses a glass cleaning device for a CCTV housing.

In addition, Republic of Korea Patent No. 10-1855623 discloses a camera device of Snout, and Korean Patent No. 10-1779321 discloses a camera device of Snout.

The camera device of the snout is branched from the nitrogen gas supply port of the nitrogen gas supply module to form a gas curtain layer at a predetermined distance from the front surface of the glass plate for protecting the camera module and the gas curtain layer is introduced into the glass plate through the duct. It includes a configuration that blocks the contamination of Ash with a double-layered gas curtain layer.

However, in the case of the camera device as described above, when the pressure of the gas injected from the nozzle is weak when the air curtain layer is formed on the front surface of the glass, the gas ejection pressure is non-uniform in the circumferential shape. Conversely, even when the pressure is strong, the movement of a strong airflow occurs, and the pollution source contaminates the glass plate more and more, so that the pollution problem as described above cannot be fundamentally solved.

Republic of Korea Patent Publication No. 2014-0069928 Republic of Korea Patent No. 10-1006045 Republic of Korea Patent No. 10-1855623 Republic of Korea Patent No. 10-1779321

The present invention is to solve the problems as described above, minimize the flow of airflow in the front of the viewing window installed to protect the camera lens exposed to the polluted environment, and adjust the amount of gas supplied to the front of the viewing window in the circumferential direction. Always distribute evenly and supply. An object of the present invention is to provide a contamination prevention device for an observation camera exposed to a polluted environment that can prevent the viewing window from being polluted by the pollutants riding on the polluted gas by raising the pressure to a minimum compared to the surrounding.

Another object of the present invention is to provide an apparatus for preventing pollution of an observation camera exposed to a polluted environment, which can prevent the camera from being damaged by heat by installing a cooling unit between the camera and the viewing window.

In addition, another object of the present invention is to increase the temperature of the sealing gas by installing a heater in the sealing gas supply part, thereby exposing to the polluted environment part which can prevent the contaminating the sight glass by binding and convection of the moisture riding on the gas of the pollutant source. An object of the present invention is to provide a contamination prevention device for an observation camera.

Another object of the present invention is to provide an apparatus for preventing pollution of an observation camera exposed to a polluted environment, which can prevent internal polluting gas from being discharged to the outside when a viewing window is replaced during operation by installing a damper.

In order to achieve the above object, the apparatus for preventing pollution of the observation camera exposed to the contaminated environment of the present invention includes a base member on which a viewing window is installed, and a camera that is rotatably installed on the base member and has a camera installed therein so as to correspond to the see-through window. housing and

a sub-housing installed on a lower surface of the base member and having a first through-hole corresponding to the see-through window;

a sealing gas supply unit installed in the sub-housing so as to communicate with the inner space of the sub-housing and supplying a sealing gas to the inside of the sub-housing;

It is installed inside the sub-housing to form a reduced pressure distribution unit for lowering the pressure of the sealing gas supplied from the sealing gas supply unit, and the sealing gas pressure-reduced by the pressure reduction distribution unit is applied to the space between the see-through window and the first through hole. It is characterized in that it is provided with a sealing gas distribution unit that blocks the inflow of the supplied contaminated gas.

In the present invention, in the sealing gas distribution unit, a fourth through hole is formed inside the sub-housing to secure a camera viewing angle, and a plurality of separators are spaced apart from the inner circumferential surface of the sub-housing by a predetermined distance to form a pressure distribution unit; ,

Installed between the separators, at least two having an outer ring portion, an inner ring portion connected by the outer ring portion and the support portion to form a second sealing gas discharge portion, and a second through hole for securing the camera viewing angle. distribution board,

A first sealing gas discharge unit positioned between the distribution plates to form a first sealing gas discharge unit communicating with the reduced pressure distribution unit, a third through hole for securing the camera viewing angle is formed, and the second sealing gas discharge unit is located on an outer circumferential surface of the A nozzle gap adjusting plate is provided so that the sealing gas introduced into the first sealing gas discharge unit can be uniformly discharged to each of the second sealing gas discharge units of the distribution plates positioned at the upper and lower sides.

The width of the separator is formed to be substantially the same as the width of the inner ring portion of the distribution plate, and extends to the first sealing gas discharge portion between the outer peripheral surface of the nozzle gap control plate and the corresponding separator to form a second sealing gas discharge portion It is provided with sealing gas distribution pins that divide the sealing gas so that the sealing gas is uniformly discharged.

and a first cooling unit for supplying and discharging cooling gas to the inner space of the camera housing to prevent overheating of the camera installed inside the camera housing, installed on the front side of the camera inside the camera housing, A diaphragm member on which a second see-through window is installed to secure a camera viewing angle is installed to form a partition space between the base member and the diaphragm member,

It further includes a second cooling unit installed in the camera housing to supply cooling gas to the compartment space to cool the compartment space to prevent overheating of the camera.

A damper unit is further provided to block the gas containing the contaminated foreign material from being discharged through the first through hole when the viewing window is exchanged, and the damper unit is rotatable on the inner circumferential surface or sub-housing of the protective cap installed on the base member. and an actuator to rotate the blocking member and the blocking member is installed.

The sealing gas distribution unit is installed inside the sub-housing, and an outer circumferential surface of the sub-housing is spaced apart from the inner circumferential surface by a predetermined distance to form a pressure-reducing distribution unit, and a plurality of diaphragms having fourth through-holes formed in the center to secure a viewing angle of the camera It is installed between members and the diaphragm members or between the end plate member and the lower surface of the sub-housing, and the sealing gas supplied to the pressure reduction distribution unit to secure the camera viewing angle is supplied between the see-through window and the second through hole. A stencil or vacant seat is installed.

The apparatus for preventing pollution of an observation camera exposed to a pollution environment according to the present invention distributes and supplies the amount of gas supplied to the inside of the sub-housing adjacent to the viewing window of the camera in a circumferential direction at all times. The pressure is maintained at a minimum pressure higher than that of the surroundings, so that the inside of the sub-housing is uniformly maintained with a fine positive pressure, thereby preventing the viewing window from being contaminated by foreign substances.

In particular, the pressure of the gas supplied from the sealing gas supply unit is reduced in multiple stages by the decompression distribution unit, and the sealing gas is supplied to the first through hole from the place spaced apart by the partition separation plate from the sight window in the sub-housing at a low pressure. It is possible to minimize the flow of gas airflow in

The present invention can prevent foreign substances from binding to the sight window by heating the sealing gas supplied from the sealing gas supply unit, and the contaminated gas is discharged to the outside through the sight window installation portion of the sub-housing and the base member when the sight glass is replaced. it can be prevented

1 is an exploded perspective view of an apparatus for preventing pollution of an observation camera exposed to a pollution environment according to the present invention;
Figure 2 is a cross-sectional view of the pollution prevention device of the observation camera exposed to the pollution environment shown in Figure 1,
3 is a cross-sectional view showing another embodiment of an apparatus for preventing pollution of an observation camera exposed to a pollution environment according to the present invention;
4 is a cross-sectional view showing a state in which the foreign material inflow blocking member is installed in the sub-housing;
5 to 7 are cross-sectional views showing other embodiments of the apparatus for preventing pollution of the observation camera exposed to the pollution environment according to the present invention;
8 is a cross-sectional view showing a rotating state of the camera housing of the pollution prevention device of the observation camera exposed to the pollution environment according to the present invention;

The apparatus for preventing contamination of the view of the observation camera exposed to the polluted environment according to the present invention is to prevent contamination of the viewing window in order to secure the view of the camera, and one embodiment thereof is shown in FIGS. 1 to 7 .

Referring to FIGS. 1 and 2 , the apparatus 10 for preventing contamination of the field of view of the observation camera exposed to the contaminated environment according to the present invention is to be installed in the snout of the plating facility, the heating furnace, the iron making facility, the pollution source tank, and the like, and a see-through window ( The base member 20 on which 21) is installed, and a camera housing 30 which is rotatably installed on the base member 20 and has a camera 100 installed therein to correspond to the see-through window 21 . And it is installed on the lower surface of the base member 20 and includes a sub-housing 40 in which a first through hole 41 is formed coaxially with the see-through window 21 on a lower surface corresponding to the see-through window 21 . A sealing gas supply unit 50 installed in the sub-housing 40 is provided for supplying sealing gas for sealing to the inner space 42 of the sub-housing 40 . And installed inside the sub-housing 40 to form a pressure reduction distribution unit 61 for lowering the pressure of the sealing gas supplied from the sealing gas supply unit 50, the sealing gas pressure-reduced by the pressure reduction distribution unit 61 is provided with a sealing gas distribution unit 70 for supplying a space between the see-through window 21 and the first through hole 41 to block the inflow of contaminated gas.

The apparatus for preventing contamination of the field of view of the observation camera exposed to the polluted environment according to the present invention configured as described above will be described in detail for each component as follows.

The base member 20 on which the see-through window 21 is installed may be formed in various shapes depending on an installation location, a camera, an optical device, and the like. The see-through window 21 installed on the base member 20 has a through hole formed in the base member 20 , and the edge is fixed by a separate fixing member 22 that blocks the through hole.

The camera housing 30 is fixedly installed on the upper portion of the base member 20 to secure a clean space in which the camera is installed, and is coupled to be closely attached to the upper surface of the base member 20 or by a hinge unit. rotatably coupled. A cover 31 is installed on the upper surface of the camera housing 30 , and the camera 100 is installed on the cover 31 so that the lens is coaxially opposed to the see-through window 21 .

A first cooling unit 110 for cooling by supplying cooling gas to the internal space in which the camera is installed is installed in the camera housing 30 . The first cooling unit 110 is not shown on one side of the camera housing 30, but a first cold air supply pipe 111 for supplying air cooled by a refrigerator, and the camera housing 30 A first cold air discharge pipe 112 installed on one side and supplied to the inner space to discharge air cooled in the inner space is provided.

On the other hand, a second cooling unit 120 for cooling the partition space partitioned by the diaphragm member 35 in which the second see-through window 36 is installed is installed in the inner space of the camera housing 30 to be described later. The second cooling unit 120 has substantially the same configuration as the first cooling unit 110 (see FIGS. 7 and 8).

In addition, the sub-housing 40 is installed on the lower surface of the base member 20 , and a first through hole 41 is formed on the lower surface corresponding to the see-through window 21 coaxially with the see-through window 21 . . An inner space in which a sealing gas distribution unit 70 to be described later is mounted is formed inside the sub-housing 40 . A foreign material inflow blocking member 43 may be installed on the lower surface of the sub-housing 40 to block the inflow of foreign materials by partitioning the periphery of the first through hole 41 . (See Fig. 4)

The sealing gas supply part 50 is for supplying the sealing gas to the inner space of the sub-housing 40, and the sealing gas supply pipe 51 installed to communicate with the inside of the sub-housing 40 and the sealing gas A valve 52 installed in the supply pipe 51 is provided. And the sealing gas supply pipe 51 is connected to a cylinder (not shown) for supplying the sealing gas. However, the present invention is not limited thereto, and the sealing gas supply pipe 51 may be connected to a sealing gas supply pipe installed at the production site. As the sealing gas, an inert gas such as argon or nitrogen gas may be used.

And as shown in FIGS. 1 and 2 , the sealing gas supply pipe 51 further includes a heating unit 55 for heating the supplied sealing gas. The heating unit 55 may have a heater for supplying the sealing gas installed on a pipe line or a separate heat exchanger for heat exchange with the sealing gas. The heating unit 55 heats the sealing gas to a predetermined temperature, thereby preventing the convection from being activated due to the temperature difference being generated in the space portion 300 close to the see-through window 21 by the sealing gas.

The sealing gas distribution unit 70 is installed inside the sub-housing 40 to supply the sealing gas supplied from the sealing gas supply unit 50 to the viewing angle of the camera on the front side of the viewing window, the sub-housing 40 A plurality of separators 71 are installed in the inside. The separator 71 has a smaller diameter than the diameter of the inner space of the sub-housing 40 and has a plate shape in which a fourth through-hole 71a is formed coaxially with the see-through window 21 and the first through-hole 41. made of absence As the separators 71 are stacked, a pressure reduction distribution unit 61 is formed between the outer circumferential surface of the separator 71 and the inner circumferential surface of the sub-housing 40 . The reduced pressure distribution unit 61 is installed to communicate with the sealing gas supply pipe 51 , and is formed in a continuous donut shape along the inner circumferential surface of the sub-housing 40 .

And at least two distribution plates 73 are stacked between the separators 71 . The distribution plates 73 are respectively connected to the outer ring portion 74 and the support portion 75 installed on the inner circumferential surface of the outer ring portions 74 to form a second sealing gas discharge portion 62 and the camera viewing angle in the central portion. and an inner ring portion 77 having a second through hole 76 formed therein for securing the . The second sealing gas discharge part 62 formed between the inner peripheral surface of the outer ring part 74 and the outer peripheral surface of the inner ring part 77 may be divided at equal intervals by the support parts 75 . The width of the separator 71 and the width of the outer ring portion 74 are preferably formed to have substantially the same width. The division of the second sealing gas discharge part 62 at equal intervals by the support part 75 is a space part 300 for securing a camera viewing angle between the see-through window 21 and the first through hole 41 . It enables the supply of sealing gas with a uniform pressure around the

A nozzle gap adjusting plate 80 is installed between the distribution plates 73 , and a third through hole 81 is installed in the center of the nozzle gap adjusting plate 80 coaxially with the see-through window 21 . Sealing gas distribution pins 82 extending along the support part 75 are installed on the outer peripheral surface of the nozzle gap control plate 80 . It is preferable that the diameter of the nozzle cap control plate 80 excluding the sealing gas distribution pin 82 is substantially intermediate the diameter of the outer ring portion 74 and the inner ring portion 77, which is Preferably, the outer circumferential surface of the nozzle cap control plate 80 is positioned in the middle of the second sealing gas discharge part 62 so that the sealing gas can be uniformly distributed in the vertical direction.

The thickness of the nozzle gap control plate 80 separates the distribution plates 73 from each other to connect the pressure reduction distribution unit 61 and the second sealing gas discharge unit 62 to the first sealing gas discharge unit 63. will form

And the second sealing gas discharge unit 62 is a third sealing gas discharge unit 64 that connects the space portion 300 forming the camera viewing angle between the upper surface of the separation plate 73 and the lower surface of the base member 20 ), between the separator 71 positioned on the upper part of the distribution plate 73 and the lower surface of the base member 20 and the separator 71 positioned below the distribution plate 73 and the A partition separator 90 having a fifth through hole 91 is installed between the bottom portion of the sub-housing 40 to discharge the third sealing gas formed between the distribution plate 73 and the partition separator 90 . Part 64 can be partitioned.

Accordingly, the sealing gas of the decompression distribution unit 61 is supplied by the first, second, and third sealing gas discharge units 63 , 62 , 64 to the space corresponding to the viewing angle of the camera under the viewing window 21 .

A plurality of sealing gas distribution units 70 may be installed in the inner space of the sub-housing 40 .

On the other hand, as shown in FIGS. 1 and 2 , a damper unit 130 is further provided to block the gas containing contaminated foreign substances from being discharged through the first through hole 41 when the see-through window 21 is exchanged. do. The damper unit 130 includes a blocking member 131 rotatably installed on the inner circumferential surface of the protective cap 400 or the sub-housing 40 and an actuator 132 for rotating the blocking member 131 .

5 and 6 show another embodiment of the sealing gas distribution unit.

The sealing gas distribution unit 150 is installed inside the sub-housing 40, and the outer circumferential surface is laminated in the inner space of the sub-housing 40, and has a diameter smaller than the diameter of the inner space of the sub-housing 40. and the diaphragm members 152 having a fifth through hole 151 coaxially formed with the see-through window 21 in the central portion are stacked.

Therefore, the pressure distribution unit 61 is formed between the inner circumferential surface of the sub-housing 40 and the outer circumferential surface of the diaphragm members 152 , and to secure the camera viewing angle between the first through hole 41 in the see-through window 21 . A space portion 300 is provided for

A porous plate 153 is installed between the diaphragm members 152 as shown in FIG. 5 or a porous stone 154 through which a sealing gas passes, as shown in FIG. 6 . Therefore, a fourth sealing gas discharge unit 65 is formed between the diaphragm members 152 by the perforated plate 153 or the perforated stone 154, and the sealing gas supplied to the reduced pressure distribution unit 61 is The stencil plate 154 or the porous seat 155 and the fourth sealing gas discharge part 65 are supplied to the space for securing the chemera viewing angle.

On the other hand, in the above-described embodiments, the space portion 300 between the viewing window 21 and the first through hole 41, that is, the space portion 300 corresponding to the viewing angle of the camera 100 is the viewing window ( It is preferable to be able to gradually expand from 21) toward the first through-hole 41. To explain this in more detail, the fifth through hole 91 formed in the partition separator 90, the second through hole 76 formed in the distribution plate 73, and the fourth through hole 76 formed in the separator 71 The through-hole 71a and the first through-hole 41 formed in the sub-housing 40 are gradually formed to be large. Unexplained reference numeral 400 denotes a container in which a protective cap to be installed in an observation facility or a camera is installed.

The operation of the apparatus for preventing contamination of the field of view of the observation camera exposed to the contaminated environment according to the present invention configured as described above will be described as follows.

The contamination prevention device of the observation camera exposed to the contaminated environment such as the snout of the plating device, the steel making facility, and the contaminated tank prevents the sight window 21 from being contaminated in the process of acquiring the image using the camera 100 . In order to do this, a sealing gas of a predetermined pressure is supplied to the reduced pressure distribution unit 61 of the sub-housing 40 through the sealing gas supply pipe 51 of the sealing gas supply unit 50 .

The sealing gas supplied as described above is introduced into a relatively wide space of the pressure reduction distribution unit 61 and the pressure is lowered, and then is uniformly supplied from the circumferential direction to the space unit 300 corresponding to the viewing angle of the camera. That is, the sealing gas supplied to the pressure reduction distribution unit 61 through the sealing gas supply pipe 51 is the outer ring portion 74 of the distribution plate 73 and the inner ring portion ( 77) and flows into the second sealing gas discharge part 62 divided in the circumferential direction of the support part 75, and then the third formed between the distribution plate 73 and the partition separator 90. It is supplied to the space part 300 through the sealing gas discharge part 64 . That is, the sealing gas supplied to the sealing gas supply unit 50 is first decompressed by the first pressure reduction distribution unit 61 , and by the nozzle gap control plate 80 , the distribution plate 73 , and the partition separation plate 90 . As it passes through the formed first sealing gas discharge unit 63 and the second and third sealing gas discharge units 62 and 64 , the pressure is secondarily decompressed and introduced into an equal pressure from the outer side of the space portion 300 . Since the sealing gas introduced into the space 300 after being decompressed in multiple stages as described above can minimize the flow of airflow in the space 300 , the gas containing contaminants is introduced into the space 300 . can be blocked.

To explain this in more detail, the sealing gas continuously supplied to the space part 300 through the first, second, and third sealing gas discharge parts 63 , 62 , 64 is charged in the space part 300 . and discharged to the outside through the first through-hole 41, at this time, the sealing gas in the space 300 is discharged in a state higher than the pressure around the first through-hole 41, so the first through-hole ( 41), it is possible to prevent the gas containing contaminants from flowing into the space portion 300 .

This can prevent the contaminants from flowing into the space from the contaminants, and furthermore, it is possible to prevent contamination of the viewing window 21 installed in the front of the camera by contaminants.

In addition, cooling air is supplied to the camera housing 30 by the first cooling unit 30 to prevent the camera 100 from overheating. In particular, as shown in FIG. 7 , the camera housing 30 is partitioned by the head plate member 35 on which the second viewing window 36 is installed, and this partitioned space, that is, the first and second viewing windows 21 and 36 . Since the space therebetween can be cooled by the second cooling unit 120 , the overheat prevention effect of the camera 100 can be maximized.

In order to replace or wipe the sight window 21, the actuator 132 of the damper unit 130 is operated to rotate the blocking member 131 to block the first through hole 41 to release the gas containing contaminants. It is possible to prevent the inflow into the single through hole (41).

In this state, by rotating the camera housing 30 with respect to the base member 20 as shown in FIG. 8 , the viewing window 21 can be replaced, the camera repaired, and the viewing window and the camera lens can be cleaned.

The apparatus for preventing contamination of the field of view of the observation camera exposed to the polluted environment according to the present invention configured as described above protects the camera installed to acquire an image in the contaminated area, and can secure the viewing angle of the camera. In particular, it is possible to fundamentally prevent the viewing window installed in the viewing range of the camera from being polluted by the contaminants introduced by riding on the airflow due to the movement of the airflow.

Although the present invention has been described with reference to the embodiment shown in the drawings, which is only exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

Claims (8)

A base member on which a see-through window is installed, and a camera housing which is rotatably installed on the base member and has a camera installed therein so as to correspond to the see-through window;
a sub-housing installed on a lower surface of the base member and having a first through-hole corresponding to the see-through window;
a sealing gas supply unit installed in the sub-housing to communicate with the inner space of the sub-housing and supplying sealing gas to the inside of the sub-housing;
It is installed inside the sub-housing to form a multi-stage reduced pressure distribution unit for lowering the pressure of the sealing gas supplied from the sealing gas supply unit, and the sealing gas decompressed by the pressure reduction distribution unit is transferred to the space between the see-through window and the first through hole. and a sealing gas distribution unit that blocks the inflow of polluted gas by supplying it to the unit,
The sealing gas distribution unit includes a plurality of separators having a fourth through-hole formed inside the sub-housing to secure a camera viewing angle and spaced apart from the inner circumferential surface of the sub-housing by a predetermined distance to form a pressure-reducing distribution unit;
Installed between the separators, at least two having an outer ring portion, an inner ring portion connected by the outer ring portion and the support portion to form a second sealing gas discharge portion, and a second through hole for securing the camera viewing angle. distribution board,
A first sealing gas discharge unit positioned between the distribution plates to form a first sealing gas discharge unit communicating with the reduced pressure distribution unit, a third through hole for securing the camera viewing angle is formed, and the second sealing gas discharge unit is located on an outer peripheral surface of the A camera for observation exposed to a polluted environment, characterized in that it has a nozzle gap control plate that allows the sealing gas introduced into the first sealing gas discharge unit to be uniformly discharged to the second sealing gas discharge units of the distribution plates positioned at the upper and lower sides. of vision pollution prevention device. delete The method of claim 1,
Sealing gas distribution pins extending to the first sealing gas discharge part and dividing the second sealing gas discharge part between the outer peripheral surface of the nozzle gap control plate and the corresponding separator are provided so that the sealing gas can be uniformly discharged. A device for preventing contamination of the field of view of the observation camera exposed to the polluted environment. The method of claim 1,
The view of the observation camera exposed to the polluted environment, characterized in that it has a first cooling unit for supplying and discharging cooling gas to the internal space of the camera housing to prevent the camera installed inside the camera housing from being overheated. pollution prevention device. 5. The method of claim 4,
A diaphragm member installed on the front side of the camera inside the camera housing and having a second see-through window for securing a camera viewing angle is installed to form a partition space between the base member and the diaphragm member,
Prevention of contamination of the field of view of the observation camera exposed to the polluted environment, characterized in that it further comprises a second cooling unit installed in the camera housing and supplying cooling gas to the compartment to cool the compartment to prevent overheating of the camera. Device. A base member on which a see-through window is installed, and a camera housing which is rotatably installed on the base member and has a camera installed therein so as to correspond to the see-through window;
a sub-housing installed on a lower surface of the base member and having a first through-hole corresponding to the see-through window;
a sealing gas supply unit installed in the sub-housing so as to communicate with the inner space of the sub-housing and supplying a sealing gas to the inside of the sub-housing;
It is installed inside the sub-housing to form a multi-stage decompression distribution unit for lowering the pressure of the sealing gas supplied from the sealing gas supply unit, and the sealing gas decompressed by the decompression distribution unit is transferred to the space between the see-through window and the first through hole. and a sealing gas distribution unit that blocks the inflow of polluted gas by supplying it to the unit,
The sealing gas distribution unit is installed inside the sub-housing, and an outer circumferential surface of the sub-housing is spaced apart from the inner circumferential surface by a predetermined distance to form a pressure-reducing distribution unit, and a plurality of diaphragms having fourth through-holes formed in the center to secure a viewing angle of the camera It is installed between members and the diaphragm members or between the head plate member and the upper and lower surfaces of the inner housing, and the sealing gas supplied to the pressure reduction distribution unit to secure the camera viewing angle is supplied between the see-through window and the second through hole. A device for preventing contamination of the field of view of the observation camera exposed to the polluted environment, characterized in that a stencil or a porous seat is installed. The method of claim 1,
A damper part is further provided to block the gas containing the contaminated foreign material from being discharged through the first through hole when the sight window is replaced, and the damper part is rotatably on the inner circumferential surface or sub-housing of the protective cap installed on the base member. An apparatus for preventing contamination of a view of a camera for observation exposed to a polluted environment, characterized in that it comprises a blocking member to be installed and an actuator for rotating the blocking member. The method of claim 1,
The device for preventing contamination of the view of the camera for observation exposed to the polluted environment, characterized in that the sealing gas supply unit further includes a heating unit for heating the sealing gas.

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