JP5781888B2 - High-temperature atmosphere furnace observation device - Google Patents

Description

  The present invention relates to an observation apparatus in a high-temperature atmosphere furnace suitable for observing the state in a high-temperature atmosphere furnace such as an electric furnace or a coke furnace, and more particularly, to protect an object to be protected such as a CCD camera used in the observation apparatus. The present invention relates to improvement of a cooling structure for efficiently cooling using a cooling medium such as gas.

Conventionally, in a device that observes the inside of a high-temperature atmosphere furnace that is constantly maintained at a high temperature of 1000 ° C. or higher, such as a coke oven, the CCD camera is cooled efficiently by circulating cooling water or a cooling gas, etc. The destruction by was prevented.
For example, Patent Document 1 includes an inner tube that accommodates the imaging device, and an outer tube that is arranged concentrically with the inner tube and accommodates the inner tube, and the inner tube and the inner tube and the outer tube are provided inside the hollow portion of the inner tube. An observation device is described in which a cooling gas is injected into the space to be formed from the base end side and flows out from the front end side. In this invention, weight reduction of the whole apparatus is implement | achieved by cooling only using cooling gas, without using cooling water.

JP 2007-308536 A

Here, the coke oven which is one of the observation objects by the observation apparatus described in Patent Document 1 will be described. The coke oven is an apparatus for producing coke by carbonizing coal, and has a configuration in which carbonization chambers for carbonizing coal and combustion chambers for heating coal in the carbonization chamber are alternately arranged in the horizontal direction. The carbonization chamber and the combustion chamber are partitioned by a furnace wall formed of refractory bricks or the like. The size of one carbonization chamber is several tens of centimeters in width, several tens of meters in depth, and several meters in height. When observing a furnace wall of a combustion chamber or a carbonization chamber, an observation device is usually inserted from an opening provided in the upper part or side part.
Since the observation device described in Patent Document 1 has a long and hard column shape, in order to insert the observation device into the combustion chamber from the opening provided above, as shown in FIG. A method of suspending and supporting the observation apparatus with a crane or the like and gradually inserting it into the combustion chamber is adopted. Accordingly, there is a problem that the insertion and removal of the observation apparatus into the coke oven is very troublesome and the entire scale of the apparatus necessary for observation in the furnace is increased.
The present invention has been made in view of the above-described circumstances, and facilitates the insertion and removal of an observation device from a coke oven or the like, and effectively cools a CCD camera disposed at the tip. An object of the present invention is to provide a high-temperature atmosphere in-furnace observation apparatus capable of performing the above.

In order to solve the above-described problem, the invention according to claim 1 includes a camera unit portion in which a camera that captures an image incident from an observation window formed on one end side, and the other end of the camera unit portion. And a body portion through which a cable for transmitting video of the camera is inserted, and the camera unit portion and the body portion are inserted into a high temperature atmosphere furnace to photograph the state in the high temperature atmosphere furnace In the high-temperature atmosphere furnace observation apparatus, the camera unit portion includes a first inner tube having a hollow portion for housing the camera, a first heat insulating member laminated on an outer surface of the first inner tube, and the first comprising a first outer tube for covering a thermal insulation member airtightly, and the front kidou portion, and the second inner tube having a flexible provided with a axial through hole communicating with the first inner pipe portion , to take advantage of the flexibility of the second inner tube to the outer surface of the second inner tube A second insulating member having a laminated absorbent, and a second outer tube of said second insulating member having a flexibility to covering the comprises is configured to be freely bent and deformed, the body portion A cooling water injection port for injecting cooling water between the second inner pipe and the second outer pipe from the base end side of the base and impregnating the cooling water into the second heat insulating member, and a base of the trunk portion And a cooling gas injection port for injecting a cooling gas into the second inner pipe from the end side and discharging it from an appropriate position of the camera unit .
In the first aspect of the invention, the second heat insulating member laminated on the second inner pipe is impregnated with cooling water, thereby cooling the trunk and shutting off high heat from the high-temperature atmosphere furnace. Further, the cooling gas is injected from the base end side of the trunk portion into the second inner tube and the first inner tube communicating with the second inner tube, and then discharged from an appropriate position of the camera unit portion, thereby being accommodated in the first inner tube. Cool the camera. Moreover, each member which comprises a trunk | drum has flexibility, and can curve a trunk | drum freely.
According to a second aspect of the present invention, in the first aspect, the cooling gas injected into the second inner pipe is discharged from the observation window.
According to the second aspect of the present invention, the cooling function is released from the observation window, whereby a purge function for blowing off dust in the observation window can be exhibited.

According to a third aspect of the present invention, in the first or second aspect , a plurality of the observation windows are formed in a circumferential direction of the camera unit portion, and a plurality of cameras that respectively capture images incident from the observation windows. It is characterized by being accommodated in the camera unit section.
In the invention of claim 3, an optical image incident from different radial with respect to the camera unit portion shooting and can be observed at a time, according to claim 4 which can be efficiently observed in a high temperature atmosphere furnace The invention according to claim 3 is characterized in that the respective observation windows are arranged at different positions in the axial direction of the camera unit section.
In the invention of claim 4 , since the axial positions of the observation windows are shifted from each other, a plurality of cameras can be shifted in the axial direction to be accommodated in the camera unit portion. It can prevent enlarging.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the internal space of the first outer tube is formed between the second inner tube and the second outer tube. It is isolated from.
According to the invention of claim 5 , the internal space of the first outer tube is a dry environment in which cooling water does not enter, and the camera unit is cooled mainly by the cooling gas.
According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the camera unit section is configured to be detachable from the body section.
According to the sixth aspect of the present invention, it is possible to cope with high-temperature atmosphere furnaces having different depths by exchanging the body portion connected to the camera unit portion with one having a different axial length.
A seventh aspect of the invention is characterized in that in any one of the first to sixth aspects, a third heat insulating member that covers the first outer pipe and the second outer pipe is further provided.
In the invention of claim 7 , the heat resistance performance of the observation apparatus can be further improved.

  According to the present invention, since the body of the observation apparatus is configured to be flexible and flexible, when inserting the imaging apparatus from above into a high-temperature atmosphere furnace to be observed, such as a coke oven, There is no need to suspend the photographing apparatus using a crane or the like, and a large-scale apparatus is unnecessary, and the photographing apparatus can be easily inserted and removed. In addition, since the photographing device portion is cooled by using two cooling media of the cooling water impregnated in the heat insulating member and the cooling gas flowing down the photographing device portion, the camera can be effectively cooled.

1 is an overall configuration diagram of a high-temperature atmosphere in-furnace observation apparatus according to a first embodiment of the present invention. It is sectional drawing which shows the basic structure of an imaging device. It is sectional drawing which shows an example of the connection structure of a camera unit part and a trunk | drum. It is sectional drawing which shows the other example of the connection structure of a camera unit part and a trunk | drum. It is a schematic diagram which shows the usage example of the observation apparatus in a high temperature atmosphere furnace which concerns on this invention. It is sectional drawing of the camera unit part which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the camera unit part which concerns on the 3rd Embodiment of this invention. It is sectional drawing of the camera unit part which concerns on the 4th Embodiment of this invention. It is sectional drawing of the camera unit part which concerns on the 5th Embodiment of this invention.

[First Embodiment]
Hereinafter, a high-temperature atmosphere furnace observation apparatus according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is an overall configuration diagram of a high-temperature atmosphere furnace observation apparatus according to the first embodiment of the present invention. The high-temperature atmosphere in-furnace observation apparatus according to this embodiment includes an inner tube through which a camera cable or the like is inserted, a heat-insulating member having water absorption laminated on the outer surface of the inner tube, and an outer covering for the heat-insulating member. A cooling gas supplied from the base end side of the inner tube and discharging the cooling gas from the tip end in which the CCD camera is built in to effectively cool the CCD camera. There is a feature.
A high-temperature atmosphere furnace observation apparatus 1 according to the present invention is inserted into a high-temperature atmosphere furnace such as a coke oven, and an image-taking apparatus 10 that takes an image of the state in the high-temperature atmosphere furnace, and a control device 20 that controls the image-taking apparatus 10. And a water supply / air supply device 30 for supplying cooling water and cooling gas to the photographing device 10.

[Photographing device]
The photographing apparatus will be described with reference to FIG. FIG. 2 is a cross-sectional view showing the basic structure of the photographing apparatus.
The photographing apparatus 10 includes a camera unit 100 and a trunk 140 inserted into a high-temperature atmosphere furnace, and further supplies a power supply voltage to the photographing apparatus 10 on the other end side (base end side) of the trunk 140. And an amplifier jacket portion 160 in which a DC / DC converter 171 and the like are housed. Cooling gas and cooling water are supplied from the water supply / air supply device 30 to the amplifier jacket portion 160 located on the base end side of the photographing device 10 to cool the photographing device 10.

Camera unit 100 can be air tight and the first inner tube 105 having a hollow portion 103 for accommodating the CCD camera 101, a first insulating member 107 laminated on the outer surface of the first inner tube 105, a first insulating member 107 And a first outer tube 109 for covering the surface. An observation window 111 through which an optical image in the high-temperature atmosphere furnace is incident is formed on the side surface of the camera unit 100 at the front end (one end).
The first inner tube 105 is a hollow cylindrical member that is closed on the distal end side and opened on the proximal end side, and an inner tube side opening 113 serving as an observation window 111 is formed through the distal side surface. For the first inner tube 105, stainless steel or the like having heat resistance in a high temperature atmosphere can be used as the material. The first inner pipe 105 may not have flexibility.
A heat-resistant sapphire glass 115 is fitted into the inner tube side opening 113. A predetermined gap 117 is partially formed between the inner tube side opening 113 and the heat-resistant sapphire glass 115. The cooling gas supplied from the base end portion of the photographing apparatus 10 is finally discharged out of the photographing unit through the gap 117. It is a structure which also has the purge function which blows off the dust of the observation window 111 part by ejecting cooling gas from the clearance gap 117.

The first outer tube 109 is a hollow cylindrical member that is closed on the distal end side and opened on the proximal end side, and an outer tube side opening 119 that becomes the observation window 111 is formed through the distal side surface. The first outer tube 109 can be made of stainless steel having heat resistance in a high temperature atmosphere. Note that the first outer tube 109 may not have flexibility as with the first inner tube 105. The first outer tube 109 accommodates the first inner tube 105 in the hollow portion 121 thereof. Further, the inner tube side opening 113 and the outer tube side opening 119 communicate with each other.
A first heat insulating member 107 is filled between the first inner tube 105 and the first outer tube 109. The first heat insulating member 107 is made of a cotton-like heat-resistant material. Specifically, for example, a cotton-like blanket made of a ceramic fiber can be used. The 1st heat insulation member 107 should just have heat insulation and heat resistance, and the thing of shapes other than cotton-like may be used. For example, when using a cloth-like one, after winding a cloth-like heat insulating member around the first inner tube 105, inserting the first inner tube 105 around which the heat insulating member is wound into the first outer tube 109, It is possible to fill a heat insulating member between the first inner tube 105 and the first outer tube 109. Of course, in the space formed between the first inner tube 105 and the first outer tube 109, the portion corresponding to the observation window 111 is not filled with the first heat insulating member 107.

The observation window 111 is formed so as to penetrate the first inner tube 105, the first heat insulating member 107, and the first outer tube 109. The observation window 111 is opened in a rectangular shape on the side surface on the front end side of the camera unit 100, and a light image in the high temperature atmosphere furnace enters from the observation window 111.
A cold mirror 123 that passes the heat ray component and reflects only the visible light component in the light image incident from the observation window 111 is disposed on the distal end side in the first inner tube 105. The cold mirror 123 is fixed to the tip in the first inner tube 105 so as to face the observation window 111.
A CCD camera 101 that converts a light image into an electrical signal is accommodated in the first inner tube 105. The CCD camera 101 is disposed closer to the base end than the cold mirror 123, converts a visible light component (light image) reflected by the cold mirror 123 into an electric signal, and supplies the electric signal to the camera unit unit 100.

Further, in the vicinity of the CCD camera 101 in the first inner tube 105, a thermocouple (not shown) that measures the temperature of the CCD camera 101 and supplies the temperature signal to the control device 20 via a compensating lead (not shown). ) Is housed. The control device 20 receives a thermocouple temperature signal and issues an alarm when the temperature of the CCD camera 101 exceeds the set temperature.
The first inner tube 105 has a camera cable connector 125 that detachably connects the CCD camera 101 and the camera cable 141 inserted into the body 140. The camera cable 141 transmits a video signal from the CCD camera 101 to the control device 20 or transmits a control signal from the control device 20 to the CCD camera 101. Further, the first inner pipe 105 has a compensation lead connector part (not shown) for detachably connecting the thermocouple and the compensation lead inserted into the body part 140. The compensating conductor transmits the temperature signal of the thermocouple to the control device 20.

The body 140 will be described. The body part 140 is disposed between the camera unit part 100 and the amplifier jacket part 160, and is a part through which the camera cable 141 and the compensation lead wire are inserted. The body 140 includes an axial through hole 143 penetrating in the axial direction, communicates with the first inner pipe 105 and has flexibility, and a water absorption layer stacked on the outer surface of the second inner pipe 145. A second heat-insulating member 147 having flexibility and a second outer tube 149 having the flexibility to cover the second heat-insulating member 147 in a water-tight manner , and the body 140 itself has a flexibility to bend. Yes. The camera cable 141 and the compensation lead wire are inserted into the axial through hole 143 of the second inner tube 145.
The second inner tube 145 is a tubular member that includes an axial through hole 143 that penetrates in the axial direction, has flexibility, and can be bent freely. The distal end portion (one end portion) of the second inner tube 145 communicates with the first inner tube 105 in which the CCD camera 101 is accommodated, and the proximal end portion (the other end portion side) is in an amplifier jacket portion 160 described later. The ventilation chamber 167 communicates with the air flow chamber 167.

Here, since it is necessary to prevent the CCD camera 101 built in the first inner pipe 105 from coming into contact with the cooling water, the cooling water does not enter the axial through hole 143 from the outside of the second inner pipe 145. It is necessary to. In other words, the second inner pipe 145 needs to have a waterproof property that prevents cooling water from passing inside, in addition to the flexibility of bending and heat resistance that can withstand a high heat environment.
For example, the second inner tube 145 may be a flexible tube in which a stainless bellows is covered with a stainless mesh. Moreover, the flexible tube which ensured waterproofness by utilizing rubber | gum and silicon | silicone can also be utilized. The material of these flexible tubes is selected according to the heat resistant temperature required in the usage environment.

The second heat insulating member 147 is a member that has heat resistance and water absorption and covers the periphery of the second inner tube 145. Specifically, for example, a cotton-like blanket made of ceramic fibers can be used. . The second heat insulating member 147 is impregnated with cooling water (industrial water or the like) from the base end portion to enhance the heat resistance of the photographing apparatus 10. A stainless wire (metal wire: not shown) is wound around the second heat insulating member 147 to fix the second heat insulating member 147 to the second inner tube 145. The second heat insulating member 147 is fixed to the second inner tube 145 by using a tape-shaped heat-resistant cloth (for example, glass fiber tape, ceramic fiber tape, etc.) instead of or in combination with the stainless steel wire. You may do it. At least, when the second heat insulating member 147 is fixed to the second inner tube 145, the flexibility of the body 140 as a whole is not lost.
The second outer tube 149 is a tubular member that includes a hollow portion 151 extending in the axial direction, has flexibility, and can be freely bent. The second inner tube 145 is inserted into the hollow portion 151. Since the second heat insulating member 147 disposed between the second outer tube 149 and the second inner tube 145 is impregnated with cooling water, the second outer tube 149 is bendable and heat resistant to withstand a high heat environment. In addition, it has a waterproof property that prevents cooling water from passing outside. As the second outer tube 149, similarly to the second inner tube 145, a flexible tube in which a stainless bellows is covered with a stainless mesh can be used. Moreover, the flexible tube which ensured waterproofness by utilizing rubber | gum and silicon | silicone can also be utilized. The material of these flexible tubes is selected according to the heat resistant temperature required in each use environment. In addition, about the 2nd outer tube | pipe 149, the tubular member which does not have waterproofness can also be used.

The amplifier jacket portion 160 will be described. The amplifier jacket portion 160 includes a substantially cylindrical casing 161 having a hollow portion 163 therein. The hollow portion 163 includes a water flow chamber 165 that serves as a cooling water passage and a ventilation chamber 167 that serves as a cooling gas passage. The water flow chamber 165 and the ventilation chamber 167 are isolated from each other.
The water flow chamber 165 is disposed on the distal end side of the housing 161 and communicates with a space formed by the second inner tube 145 and the second outer tube 149. Further, a cooling water inlet 169 for supplying cooling water to a space formed by the second inner pipe 145 and the second outer pipe 149 via the water flow chamber 165 is disposed at an appropriate position on the side surface of the front end portion of the housing 161. Has been. The cooling water is supplied between the second inner pipe 145 and the second outer pipe 149 from the base end side of the body 140.
Four cooling water inlets 169 are formed at equal intervals on the side surface of the front end of the housing 161. At least one of the cooling water inlets 169 is connected to the water supply / air supply device 30 via the cooling water supply pipe 31 (see FIG. 1), and the cooling water is formed in the space formed by the second inner pipe 145 and the second outer pipe 149. Supply. The cooling water injected from the cooling water inlet 169 passes through the water flow chamber 165 and is then impregnated in the second heat insulating member 147 to effectively cool and insulate the body 140 under a high temperature atmosphere. The cooling water inlet 169 that is not connected to the water supply / air supply device 30 is once injected into the space formed by the second inner pipe 145 and the second outer pipe 149, and then overflows the cooling water (water Or function as a discharge port for discharging steam.

The ventilation chamber 167 is disposed on the proximal end side of the housing 161 and communicates with the axial through hole 143 of the second inner tube 145 and the hollow portion 103 of the first inner tube 105.
The ventilation chamber 167 houses electrical components such as a DC / DC converter 171 that supplies a power supply voltage to the CCD camera 101 and an RS232C / 485 converter 173 that converts RS-232C and RS-485 bidirectionally. . Further, a camera cable connector for detachably connecting the camera cable 141 drawn from the base end side of the second inner tube 145 and the DC / DC converter 171 and the RS232C / 485 converter 173 in the ventilation chamber 167. A compensation conductor connector (not shown) that detachably connects the part 175 and a compensation lead (not shown) drawn from the base end side of the second inner pipe 145 and a cable for transmitting a temperature signal to the control device 20. Are arranged).

Furthermore, an interface that outputs a video signal from the CCD camera 101 and a temperature signal from the thermocouple to the outside of the photographing apparatus 10 and receives a control signal from the outside in the photographing apparatus 10 is provided at the base end portion of the casing 161. A multi-core connector 177 is arranged. The video signal, the temperature signal, and the control signal are transmitted to the control device 20 via the composite cable 21 connected to the multicore connector 177 (see FIG. 1).
A cooling gas injection port 179 that supplies cooling gas into the axial through hole 143 and the hollow portion 103 through a ventilation chamber is disposed at a suitable position on the base end side of the housing 161. The cooling gas inlet 179 is connected to the water supply / air supply device 30 via the cooling gas supply pipe 33 (see FIG. 1). The cooling gas supplied from the water supply / air supply device 30 cools the DC / DC converter 171 and the RS232C / 485 converter 173 in the process of passing through the amplifier jacket portion 160, and penetrates in the axial direction from the base end side of the body portion 140. The CCD camera 101 is cooled by flowing into the hole 143 and flowing into the hollow portion 103, and is discharged to the outside of the photographing apparatus 10 through a gap 117 formed in the observation window 111 portion.

Here, a connection structure between the body 140 and the camera unit 100, and the amplifier jacket 160 and the body 140 will be described with reference to FIG. FIG. 3 is a cross-sectional view showing an example of a connection structure between the camera unit portion and the body portion. The body portion and the camera unit portion according to the present embodiment are detachably fixed.
As shown in the figure, the body 140 and the camera unit 100 are detachably connected to each other at a connection 190. The connecting portion 190 includes a male screw formed on the outer peripheral surface on the proximal end side of the first outer tube 109 and a female screw formed on the inner peripheral surface on the distal end portion side of the second outer tube 149 and screwed to the male screw. And. In addition, a partition wall 191 is formed between the second outer tube 149 and the second inner tube 145 on the distal end side of the body 140, and a space formed by the first outer tube 109 and the first inner tube 105. And the space formed by the second outer tube 149 and the second inner tube 145 are isolated. That is, the first heat insulating member 107 is configured not to contact the second heat insulating member 147. Whereas the second heat insulating member 147 is a wet environment where the cooling water is impregnated, the first heat insulating member 107 is a dry environment that does not contain cooling water, and the camera unit 100 is cooled mainly by the cooling gas. Note that the first heat insulating member 107 and the second heat insulating member 147 may be impregnated with cooling water without having the partition wall 191.

Further, as shown in the figure, the distal end portion of the second inner tube 145 extends into the camera unit portion 100, and is in the hollow portion 103 of the first inner tube 105 and the axial through hole 143 of the second inner tube 145. It is the structure which communicates with. The inside of the hollow portion 103 and the inside of the axial direction through hole 143 are dry environments in which cooling water does not enter. A camera cable 141 is inserted into the axial through-hole 143 and is detachably connected to the CCD camera 101 at a camera cable connector portion 125 disposed in the hollow portion 103. The same applies to the compensation lead wire (not shown).
Accordingly, the male and female screws of the connecting portion 190 are loosened to separate the first outer tube 109 and the second outer tube 149, the first inner tube 105 and the second inner tube 145, respectively, and the camera cable connector portion 125. If the connector portion of the compensation conductor is separated, the body portion 140 and the camera unit portion 100 can be completely separated.

Or it is good also as a structure as shown in FIG. FIG. 4 is a cross-sectional view showing another example of the connection structure between the camera unit and the body. The connecting portion 192 includes a first flange portion 193 that protrudes from the outer peripheral surface of the first outer tube 109 on the proximal end side, and a second flange that protrudes from the outer peripheral surface of the second outer tube 149 on the distal end portion side. Part 194, the first flange part 193 and the second flange part 194 are opposed (contacted), and are fixed using bolts 195 and nuts 196. Further, the space formed by the first outer tube 109 and the first inner tube 105 and the space formed by the second outer tube 149 and the second inner tube 145 are separated by a partition wall 191.
The body 140 and the amplifier jacket 160 are also configured to be detachable in the same manner. However, since the connection structure is similar to the connection structure between the body 140 and the camera unit 100, detailed description thereof is omitted. .
As described above, the body 140 and the camera unit 100, and the body 140 and the amplifier jacket 160 are configured to be detachable. Therefore, the camera unit 100 and the amplifier jacket 160 are separated from the body 140, and the axial direction By replacing the body portion 140 with a different length, the camera unit 100 and the amplifier jacket portion 160 can be shared, and the photographing apparatus 10 can be adapted to a high-temperature atmosphere furnace having a different depth. In addition, since the body part 140 and the camera unit part 100 are configured to be detachable, inspection and replacement when the CCD camera 101 fails are easy.

Although the basic cooling and heat insulating structure is as described above, a third heat insulating member 199 may be further laminated on the outer surfaces of the first outer tube 109 and the second outer tube 149 as shown in FIG. . In the figure, the third heat insulating member 199 is described as being separated between the camera unit 100 and the body 140 for convenience of explanation, but the first outer tube 109 and the second outer tube 149 are collectively shown. Thus, the structure may be covered.
The third heat insulating member 199 includes a cotton-like heat-resistant material that covers the outer surfaces of the first outer tube 109 and the second outer tube 149, and a heat-resistant material for fixing the heat-resistant material to the first outer tube 109 and the second outer tube 149. , And a heat-resistant bag that houses the first outer tube 109 and the second outer tube 149 together with the stainless steel wire. Of course, the part corresponding to the observation window 111 is open. As the cotton-like heat-resistant material, the same material as the first heat-insulating member 107 and the second heat-insulating member 147, specifically, a cotton-like blanket made of ceramic fibers can be used. Moreover, as a heat-resistant bag, a bag-shaped glass cloth etc. can be used, for example.
Thus, the heat resistance performance of the imaging device 10 can be enhanced by covering the outer surfaces of the first outer tube 109 and the second outer tube 149 except the observation window 111 with the third heat insulating member 199. The third heat insulating member 199 may be used in a dry state without being impregnated with cooling water, but may be used after being impregnated with cooling water to be in a wet state. In the latter case, the heat resistance performance of the photographing apparatus 10 can be further improved.

[Control device]
The control device 20 controls the photographing device 10 and the like by generating a control command corresponding to the operation content of the housing 201 and the operation panel 203 disposed in the housing 201 and formed on the front surface of the housing 201. A control circuit (not shown), an alarm circuit (not shown) that generates an alarm sound by processing the operation content of the operation panel 203 disposed in the housing 201 and the temperature signal output from the imaging device 10, and the like; A display circuit (not shown) that processes the output content of the control circuit and the output content of the alarm circuit to generate a display signal and the like, and the video signal output from the photographing apparatus 10 are taken into a designated signal format. An image processing circuit (not shown) that converts and outputs this is provided.
The operation panel 203 includes a main power switch 205 that is operated when the power of the entire control device 20 is turned on / off, a camera power switch 207 that is operated when the power of the CCD camera 101 is turned on / off, and a thermoelectric device. A temperature power switch 209 that is operated when starting processing of a temperature signal output from the pair, and a light amount adjustment digital switch that is operated when adjusting the exposure time of the CCD camera 101 to adjust the electronic iris. 211, a temperature alarm lamp 213 that is lit when the temperature of the CCD camera 101 exceeds the set temperature, a temperature alarm setting unit 215 that is operated when setting the allowable temperature of the CCD camera 101, and the CCD camera 101 And a temperature indicator 217 for displaying the temperature of each of them with a digit LED.
When the main power switch 205 of the operation panel 203 is operated to turn on the power and the camera power switch 207 is operated to turn on the power, the photographing apparatus 10 is controlled to photograph the state in the high temperature atmosphere furnace. The video signal obtained by this photographing operation is taken in, converted into a video signal of a designated format, and supplied to an external monitor device or the like.
Further, if the temperature power switch 209 is operated and the power is turned on, the temperature signal output from the photographing apparatus 10 is fetched and the temperature of the CCD camera 101 is displayed on the temperature display 217. When the set temperature is exceeded, the temperature alarm lamp 213 is turned on to inform the operator that the temperature is too high.

[Water supply air supply device]
The water supply / air supply device 30 is a device that supplies cooling gas and cooling water to the imaging device 10, and includes a gas source (not shown) and a cooling water tank. Here, as the cooling gas supplied to the photographing apparatus 10, for example, air, an inert gas such as nitrogen gas or argon gas, or the like can be used. The cooling water can be, for example, industrial water or other cooling liquid.
The cooling gas is supplied into the imaging apparatus 10 from a cooling gas inlet 179 disposed at the base end of the amplifier jacket section 160 of the imaging apparatus 10. Further, the cooling water is supplied into the photographing apparatus 10 from a cooling water inlet 169 disposed on the side surface of the amplifier jacket portion 160.

〔Example of use〕
A use example of the above-described high-temperature atmosphere furnace observation apparatus 1 will be described with reference to FIGS. 1, 2, and 5. FIG. 5 is a schematic diagram showing an example of use of the observation apparatus in a high-temperature atmosphere furnace according to the present invention. FIG. 5 shows a coke oven as an example of a high temperature atmosphere furnace.
The coke oven 400 has a configuration in which a carbonization chamber (not shown) for carbonizing coal and a combustion chamber 401 for heating the coal in the carbonization chamber are alternately arranged in the horizontal direction. Only the combustion chamber is shown in the figure. The furnace wall 403 of the combustion chamber 401 is formed of refractory bricks or the like. An opening 405 into which a lance or the like can be inserted is formed in the upper portion of the combustion chamber 401. The photographing apparatus 10 of the high-temperature atmosphere in-furnace observation apparatus 1 is inserted from the opening 405 to observe the furnace wall 403. I do.
The observation apparatus 1 in a high-temperature atmosphere furnace according to the present embodiment is mounted on a moving carriage 410 provided with a winding device 411 that winds up and unwinds the camera unit 100 and the body 140, and the coke oven 400. It can move freely on the top.

As described above (see FIG. 2), the second inner tube 145, the second heat insulating member 147, and the second outer tube 149 constituting the body 140 of the photographing apparatus 10 are each made of a flexible member. The body part 140 itself has a flexibility that can be bent. Although the camera unit 100 does not have the flexibility as the body 140, the axial length is sufficiently short with respect to the winding radius of the winding device 411, and the camera unit 100 is substantially wound. The take-up device 411 can be wound up.
The cooling water inlet 169 and the cooling gas inlet 179 of the amplifier jacket section 160 are supplied with cooling water and cooling gas from the water supply / air supply device 30 via the movable carriage 410, respectively. Further, the multicore connector 177 is connected to the control device 20 by the composite cable 21 via the movable carriage 410.

Now, cooling water is injected from the cooling water inlet 169 to sufficiently impregnate the second heat insulating member 147, and cooling gas is supplied from the cooling gas inlet 179. Then, as shown in FIG. 5, while unwinding the camera unit unit 100 and the body unit 140 from the winding device 411, the camera unit unit 100 is gradually inserted into the combustion chamber 401 from the opening 405 and attached to the CCD camera 101. The state of the furnace wall 403 is observed.
The cooling water is supplied from the cooling water inlet 169 even during observation in the coke oven 400, but the cooling water in excess of the water absorption capacity of the second heat insulating member 147 is connected to the water supply / air supply device 30. There is no water or steam discharged from the cooling water inlet 169. The body 140 is insulated from the high-temperature atmosphere environment while being cooled by the cooling water impregnated in the second heat insulating member 147. Further, the CCD camera 101 is cooled by the cooling gas which has passed through the second heat insulating member 147 and the second inner pipe 145 sufficiently insulated by the cooling water. The CCD camera 101 can be used for several minutes without exceeding its use limit temperature even in a high temperature environment exceeding 1200 ° C. The cooling gas that has cooled the CCD camera 101 is discharged to the outside of the camera unit 100 through the gap 117 in the observation window 111 portion. At this time, since the cooling gas blows off dust on the surface of the heat-resistant sapphire glass 115, the state of the furnace wall 403 can be clearly photographed by the CCD camera 101.

  As described above, according to the present embodiment, since the body portion of the photographing apparatus is flexible and can be bent freely, the photographing apparatus from above in a high-temperature atmosphere furnace to be observed, such as a coke oven. When the camera is inserted, it is not necessary to suspend the photographing apparatus using a crane or the like, and a large-scale apparatus is not necessary, and the photographing apparatus can be easily inserted and removed. In addition, the CCD camera can be effectively cooled because the imaging device portion is cooled by using two cooling media of the cooling water impregnated in the heat insulating member and the cooling gas flowing down the imaging device portion. In addition, the second heat insulating member is impregnated with the cooling water and the overflow is discharged without being included in the second heat insulating member, and no special path for circulating the cooling water is provided. , The flexibility of the body can be increased. In addition, since the camera unit and the amplifier jacket can be freely attached to and detached from the body, it can be easily replaced with a body having a different length. It can correspond to a deep high temperature atmosphere furnace.

[Second Embodiment]
Hereinafter, a high-temperature atmosphere furnace observation apparatus according to a second embodiment of the present invention will be described with reference to FIG. FIG. 6 is a cross-sectional view of a camera unit section according to the second embodiment of the present invention. The high-temperature atmosphere in-furnace observation apparatus according to this embodiment is characterized in that a light image incident through a monitoring window is directly guided to a CCD camera. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
The camera unit section 130 covers the first inner tube 105 having the hollow portion 103 that houses the CCD camera 101, the first heat insulating member 107 laminated on the outer surface of the first inner tube 105, and the first heat insulating member 107. And a first outer tube 109. An observation window 111 through which a light image in the high-temperature atmosphere furnace is incident is formed on the front end surface (one end surface) of the camera unit 100.
The first inner tube 105 is a hollow cylindrical member penetrating in the axial direction, and an inner tube side opening 113 serving as an observation window 111 is formed through the distal end surface. A heat-resistant sapphire glass 115 is fitted into the inner tube side opening 113 in a state where a predetermined gap 117 is partially formed. Near the CCD camera 101 of the heat-resistant sapphire glass 115, a cold filter 131 that cuts the heat ray component from the light image incident from the observation window 111 and passes only the visible light component is disposed.
An outer tube side opening 119 that forms an observation window 111 is formed through the front end surface of the first outer tube 109. Of course, the first heat insulating member 107 is not laminated on the portion corresponding to the observation window 111, and the observation window 111 extends over the first inner tube 105, the first heat insulating member 107, and the first outer tube 109. It is formed through.
By configuring in this way, as in the high-temperature atmosphere furnace observation apparatus according to the first embodiment, the CCD camera 101 can be effectively cooled, and the state in the high-temperature atmosphere furnace can be monitored via the observation window 111. Can be observed.

[Third Embodiment]
A high-temperature atmosphere furnace observation apparatus according to the third embodiment of the present invention will be described with reference to FIG. FIG. 7 is a cross-sectional view of a camera unit section according to the third embodiment of the present invention. In the high-temperature atmosphere in-furnace observation apparatus according to this embodiment, a plurality of observation windows are formed in the circumferential direction of the camera unit section, and a light image incident on the camera unit section from each observation window is photographed with a CCD camera. There is a feature in the point. Hereinafter, the same parts as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted.
Two observation windows (a first observation window 111a and a second observation window 111b) are formed in the camera unit 220 at different positions in the circumferential direction. The hollow portion 103 of the first inner tube 105 accommodates CCD cameras (first CCD camera 101a and second CCD camera 101b) that respectively capture images incident from the first observation window 111a and the second observation window 111b. ing.
Since the structure of each observation window is the same as that of the observation window according to the first embodiment, description thereof is omitted. Note that the members shown in FIG. 7 are assigned the same numerals as the members described in the first embodiment, but in particular, the members related to the first observation window 111a are assigned the alphabet symbol a. The members related to the second observation window 111b are given the alphabetic symbol b.

On the first observation window 111a side of the camera unit 220, a first cold mirror 123a that reflects only a visible light component from a light image incident from the first observation window 111a, and a visible light reflected by the first cold mirror 123a. A first CCD camera 101a for taking an image is arranged.
Further, on the second observation window 111b side of the camera unit 220, the second cold mirror 123b that reflects only the visible light component from the light image incident from the second observation window 111b and the second cold mirror 123b are reflected. A second CCD camera 101b that captures a visible image is arranged.
In the present embodiment, the first observation window 111a and the second observation window 111b are formed so that light images from directions different from each other by 180 degrees are incident. Therefore, the surface opposite to the surface where one CCD camera (first CCD camera 101a) can be photographed can be photographed by the other CCD camera (second CCD camera 101b). Of course, three or more observation windows are formed in the circumferential direction of the camera unit 220, and a plurality of CCD cameras corresponding to the respective observation windows are accommodated in the first inner tube 105, and light images incident from the respective observation windows are accommodated. You may make it image | photograph with CCD camera corresponding to each observation window.

Further, both the first observation window 111a and the second observation window 111b are arranged at positions where the axial positions of the camera unit 220 are substantially the same. There are no electrical components such as a CCD camera or camera cable on the path of the heat ray component of the light image incident from each observation window and transmitted through each cold mirror. Not to give.
As described above, since the high-temperature atmosphere in-furnace observation apparatus according to this embodiment includes a plurality of observation windows, it is possible to capture and observe light images incident on the camera unit from different radial directions at a time. The observation in the high-temperature atmosphere furnace can be performed efficiently. In addition, since a large number of areas to be imaged in the high-temperature atmosphere furnace can be simultaneously imaged, the insertion time of the observation apparatus in the high-temperature atmosphere furnace can be shortened, which contributes to the extension of the life of the apparatus.

[Fourth Embodiment]
A high-temperature atmosphere furnace observation apparatus according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a cross-sectional view of a camera unit section according to the fourth embodiment of the present invention. The observation apparatus in a high-temperature atmosphere furnace according to the present embodiment forms a plurality of observation windows in the circumferential direction of the camera unit, and photographs a light image incident on the camera unit from each observation window with a single CCD camera. There is a feature in the point. Hereinafter, the same parts as those in the first to third embodiments are denoted by the same reference numerals, and the description thereof is omitted.
A cold mirror 223 is disposed on the tip side of the camera unit 221. The cold mirror 223 includes a first reflecting surface 223a that reflects the visible light component of the light image incident from the first observation window 111a to the CCD camera 101, and a visible light component of the light image incident from the second observation window 111b. And a second reflecting surface 223b that is reflected by the camera 101. Therefore, a single CCD camera 101 can capture a light image incident from the first observation window 111a and the second observation window 111b facing in directions different from each other by 180 degrees.
As described above, according to the observation apparatus in the high-temperature atmosphere furnace according to the present embodiment, since the light images incident from the plurality of observation windows are taken with a single CCD camera, the number of CCD cameras accommodated in the camera unit section This can reduce the size of the camera unit.

[Fifth Embodiment]
A high-temperature atmosphere furnace observation apparatus according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a cross-sectional view of a camera unit section according to the fifth embodiment of the present invention. The high-temperature atmosphere in-furnace observation apparatus according to this embodiment is characterized in that CCD cameras corresponding to a plurality of observation windows formed in the circumferential direction of the camera unit unit are accommodated in the camera unit unit so as not to interfere with each other in the axial direction. There is. Hereinafter, the same reference numerals are given to the same portions as those in the first to fourth embodiments, and the description thereof is omitted.
Two observation windows (a first observation window 111a and a second observation window 111b) are formed in the camera unit 230 at different positions in the circumferential direction. The first inner tube 105 of the camera unit 230 accommodates CCD cameras (first CCD camera 101a and second CCD camera 101b) that respectively capture images incident from the first observation window 111a and the second observation window 111b. Yes.
The first observation window 111a and the second observation window 111b are arranged at different positions in the axial direction of the camera unit 220, and the first CCD camera 101a and the second CCD camera 101b are arranged in the axial direction in the first inner tube 105. Are accommodated at positions that do not interfere with each other.

Reflected by the first observation window 111a, the first cold mirror 123a that reflects only the visible light component from the light image incident from the first observation window 111a, and the first cold mirror 123a on the front end side of the camera unit 230. A first CCD camera 101a for taking a visible image is disposed.
Further, on the base end side of the camera unit 230, a second observation window 111b, a second cold mirror 123b that reflects only a visible light component from a light image incident from the second observation window 111b, and a second cold mirror 123b. A second CCD camera 101b that captures a visible image reflected by is arranged. Note that the second observation window 111 b and the cold mirror 123 b are arranged with their axial positions shifted from the first CCD camera 101 a so that they do not interfere with each other in the hollow portion 103.
In FIG. 9, the second observation window 111b has the same structure as that of the first embodiment, but is incident on the inner side of the heat-resistant sapphire glass 115b from the second observation window 111b as in the second embodiment. You may arrange | position the cold filter which cuts a heat ray component from a light image, and lets only a visible light component pass.

In the present embodiment, the observation window is formed so as to face a direction different by 180 degrees in the circumferential direction. Of course, three or more observation windows are formed in the circumferential direction of the camera unit 220, and the observation windows are arranged at positions shifted in the axial direction with respect to each other, and the positions in the axial direction are shifted so as not to interfere with each other. A light image incident from each observation window may be taken by the CCD camera.
As described above, in the high-temperature atmosphere in-furnace observation apparatus according to the present embodiment, since the CCD cameras are arranged at positions where they do not interfere with each other in the axial direction, the camera unit portion is accommodated while accommodating a plurality of CCD cameras. It is possible to prevent the enlargement in the radial direction.

  DESCRIPTION OF SYMBOLS 1 ... High temperature atmospheric furnace observation apparatus, 10 ... Imaging apparatus, 100 ... Camera unit part, 101 ... CCD camera, 103 ... Hollow part, 105 ... First inner pipe, 107 ... First heat insulation member, 109 ... First outer pipe 111 ... Observation window, 113 ... Inner tube side opening, 115 ... Heat resistant sapphire glass, 117 ... Gap, 119 ... Outer tube side opening, 121 ... Hollow part, 123 ... Cold mirror, 125 ... Camera cable connector part, 130 ... Camera unit part 131 ... Cold filter 140 ... Body part 141 ... Camera cable 143 ... Axial through hole 145 ... Second inner pipe 147 ... Second heat insulating member 149 ... Second outer pipe 151 ... Hollow part, 160 ... Amplifier jacket part, 161 ... Housing, 163 ... Hollow part, 165 ... Water flow chamber, 167 ... Venting chamber, 169 ... Cooling water inlet, 171 ... DC / DC converter 173 ... RS232C / 485 converter, 175 ... Camera cable connector part, 177 ... Multi-core connector, 179 ... Cooling gas inlet, 190 ... Connection part, 191 ... Bulkhead, 192 ... Connection part, 199 ... Third heat insulating member , 220, 221, 230... Camera unit, 223 .. cold mirror, 223 a... First reflecting surface, 223 b. Water supply pipe, 33 ... Cooling gas supply pipe

Claims (7)

A camera unit which camera is built for photographing an image incident from the observation window formed at one end, the cable that is connected to the other end of the camera unit and transmits the image of the camera is inserted cylinder In the high-temperature atmosphere furnace observation device for photographing the state in the high-temperature atmosphere furnace by inserting the camera unit part and the body part into the high-temperature atmosphere furnace,
The camera unit portion hermetically covers the first inner tube having a hollow portion for housing the camera, the first heat insulating member laminated on the outer surface of the first inner tube, and the first heat insulating member. A first outer tube ,
Before kidou portion, and the second inner tube having a flexible provided with a axial through hole communicating with the first inner tube section, the flexibility of the second inner tube to the outer surface of the second inner tube a second insulating member having a laminated absorbent as leverage, and a second outer tube of said second insulating member having a flexibility to covering the comprises is configured to be freely curved and deformed,
A cooling water injection port for injecting cooling water between the second inner pipe and the second outer pipe from the base end side of the body portion to impregnate the second heat insulating member with the cooling water; And a cooling gas inlet for injecting a cooling gas into the second inner pipe from the base end side of the part and releasing it from an appropriate position of the camera unit part .   The observation apparatus in a high-temperature atmosphere furnace according to claim 1, wherein the cooling gas injected into the second inner pipe is discharged from an observation window. A plurality of the observation windows are formed in the circumferential direction of the camera unit part,
The high-temperature atmosphere furnace observation apparatus according to claim 1 or 2 , wherein a plurality of cameras that respectively capture images incident from the observation windows are accommodated in the camera unit. 4. The observation apparatus in a high-temperature atmosphere furnace according to claim 3 , wherein the observation windows are arranged at different positions in the axial direction of the camera unit. The internal space of the first outer tube, any one of claims 1 to 4, characterized in that it is isolated from the space formed between the second outer pipe and said second inner tube High-temperature atmosphere furnace observation equipment. The high-temperature atmosphere furnace observation apparatus according to any one of claims 1 to 5 , wherein the camera unit part is configured to be detachable from the body part. The high-temperature atmosphere furnace observation apparatus according to any one of claims 1 to 6 , further comprising a third heat insulating member that covers the first outer tube and the second outer tube.

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