JPH05163514A - Device for observing inner part in furnace - Google Patents

Abstract

PURPOSE:To change image pickup direction of a TV camera with a comparatively single device, to enable grasp of the image pickup direction from the outer part and to facilitate the confirmation of a position at the time of repairing a furnace wall and a material to be treated in the furnace, etc. CONSTITUTION:This device is provided with an observing means 7 providing a protecting device 2 to high temp. environment, an optical instrument 5, by which an image pickup optical axis of the observing means 7 can optically be reflected, and member group 9, 14 fluctuating the image pickup direction of the observing means 7 by mechanically positional-controlling the optical instrument 5 and a display device 10 showing the image pickup direction of the observing means 7 based on the operating quantity of the member group 9, 14, 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-furnace observing device for observing changes in wall surfaces of various kinds of in-furnace and in-furnace objects, and more specifically, to display an image pickup direction of a television camera provided in the in-furnace observing device. The present invention relates to a furnace observation device equipped with a display device.

[0002]

2. Description of the Related Art Refractory bricks applied to the inside of steel skins of blast furnaces,
The lining of irregularly shaped refractories is gradually worn out during operation, and it is necessary to repair it at an appropriate time. In order to judge the degree of wear of the lining of this blast furnace and to judge whether repair is necessary, the most reliable means is to directly observe the condition inside the high temperature furnace during operation.

For this reason, conventionally, an in-furnace observing device has been used which has an observing means such as a television camera and can directly observe the state of the inside of the blast furnace during operation.

As such an in-reactor observing device, for example, as described in Japanese Utility Model Publication No. 57-46360,
On the bottom of an airtight container equipped with a transparent peephole at the bottom, a remote rotating mount is installed, and the rotating mount is pivotally supported by a rotating mirror, and the wall surface is projected below the mirror. There is known a device including a device and having a structure in which an image of a wall surface reflected on a transfer mirror is captured by an imaging device.

According to this apparatus, the observation of the entire furnace wall can be performed easily and easily. Therefore, the wear position, the wear amount, etc. prior to the periodic inspection of the furnace wall or the repair of the furnace wall can be confirmed. The survey can be carried out reliably, and the repair timing and the repair contents can be accurately grasped.

[0006]

However, in this observation device, a complicated mechanical elevation device such as an electric cylinder is used to adjust the reticle to a predetermined angle, and the entire device becomes large and complicated. It has become a cause of frequent failures in combination with the use in high temperature conditions. In addition, since it is not possible to accurately grasp the imaging direction of the television camera when the angle of the mirror is changed, it is difficult to confirm the position when repairing the furnace wall.

An object of the present invention is to solve the above-mentioned problems in the conventional in-reactor observation apparatus, and it is possible to change the image pickup direction of the television camera with a relatively simple apparatus, and further, to change the image pickup direction. It is an object of the present invention to obtain an in-furnace observation device that enables confirmation from the outside of the furnace and facilitates confirmation of the position and confirmation of the in-reactor object during repair of the furnace wall.

[0008]

In order to achieve the above object, an in-furnace observing apparatus of the present invention comprises an observing means provided with a protector against a high temperature environment, and an optical axis of an image pickup of the observing means is optically bent. And a group of members that can change the imaging direction of the observation means by mechanically controlling the position of the optical device, and the imaging direction of the observation means based on the operation amount of the member group. And a display device.

[0009]

In the present invention, the photographing direction of the observing means is displayed on the display device based on the operation amount of the member group for controlling the position of the optical device. Therefore, the observing position in the furnace can be accurately grasped. Like

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view showing an embodiment of the in-furnace observation apparatus of the present invention.

The inside of the furnace observing device 1 is covered with a protector composed of a water cooling jacket 2 so as to adapt to the high temperature environment in the furnace. Inside the water cooling jacket 2, a cooling device provided at the base end is provided. Cooling water is injected from the pipe 3. A transparent observation window 4 formed by combining a plurality of heat-resistant glass such as quartz glass is provided on the side surface of the tip of the device 1.
Further, inside the apparatus 1, a turning mirror 5 directed to the observation window 4 and a television camera 7 as an observing means for picking up an image of the furnace reflected on the turning mirror 5 and sending the image to an external monitor 6. Is provided. A gas cooling effect is obtained by feeding a cooling gas (air or inert gas) into the apparatus 1 from the outer end in the direction of arrow A and discharging the gas from around the observation window 4 into the furnace as shown by arrow B. Can also be used together.

The rotating mirror 5 has one end rotatably supported on the side wall of the apparatus 1 by a mirror rotating pin 5a.
Further, in the middle thereof, an operating rod 9 is continuously provided via an operating pin 8. Therefore, by moving the operating rod 9 back and forth, the pointing direction of the turning mirror 5 can be arbitrarily changed.

Reference numeral 10 denotes a display device for displaying the image pickup direction of the television camera 7 in accordance with the variation amount of the operating rod 9.
Angle scale plate 11 showing the imaging direction, arm pin 1 at the base end
The mirror rotation arm 14 is rotatably attached to the casing 13 by the reference numeral 2, and the imaging direction pointer 15 is attached to the tip of the mirror rotation arm 14. Also,
In a more advanced device, a rotary encoder 16 that electrically outputs the imaging direction is connected to the arm pin 12, and the end of the operation rod 9 is attached to the base of the mirror rotating arm 14 by a drive pin 14a. ..

FIG. 2 shows the rotation angle of the rotation mirror 5.
3 is an explanatory diagram illustrating a relationship between an image capturing direction and an instruction device 10. FIG.

FIG. 1A shows a normal state, in which the rotating mirror 5 is arranged at an angle of 45 ° with respect to the optical axis of the television camera 7. Therefore, in this state, the imaging direction (optical axis) of the TV camera 5 is right beside, that is,
The point A of the object to be imaged 32 in the figure is directed. Then, at this time, the imaging direction pointer 15 of the display device 10 is configured to point to a position of 0 right next to the angle scale plate 11.

Next, as shown in FIG. 3B, when the rotating mirror 5 is rotated about the mirror rotating pin 5a by an angle α, the incident angle and the reflection angle are the same,
The image pickup optical axis of the television camera 5 is directed to the point B moved upward by the angle 2α. At this time, the operating rod 9
Mirror rotation arm 1 of display device 10 connected via
4 rotates about the arm pin 12 by an angle β, and the imaging direction pointer 15 points upward by an angle β with respect to the position of the scale 0 on the angle scale plate 11. At that time, the scale of the angle scale plate 11 is set to the rotation angle β of the mirror rotation arm 14.
Instead, the scale corresponding to the pointing direction of the TV camera is displayed. That is, the number 2α is displayed at the position of the angle β. Therefore, for example, 1
On the contrary, when it is desired to observe 0 ° upward, the angle scale 11
While looking at the scale of the
Mirror rotation arm 1 so as to direct the position of 10 degrees of 1
If 4 is turned, the turning mirror 5 will move about 5 °.
This causes the TV camera 7 to rotate, and thereby the pointing direction of the TV camera 7 moves upward by 10 °. As described above, since the actual image pickup direction of the television camera 7 is displayed on the angle scale plate 11, it is possible to easily select the observation direction while looking at this number or the direction of the pointer 15.

At this time, it is desirable to make the actual observation direction B and the direction B of the pointer 15 coincide with each other in order to facilitate the operation of the device. For this purpose, the relationship β = 2α is required to be established, but this structure can be approximately realized with accuracy that practically does not make a difference by configuring as follows. That is, when the joint point between the actuating rod 9 and the rotating mirror 5 is 8 and the joint point with the mirror rotating arm 14 is 14 a, the length between the mirror rotating pin 5 a and the joint point 8 is jointed with the arm pin 12. Point 1
It may be designed to be twice the length between 4a.

As shown in FIG. 3, the rotary encoder 16 outputs the output signal 16 from the rotary encoder 16.
amplifier 17 for amplifying a, and further this amplified signal 1
7a is connected to a calculator 18 for calculating the optical axis direction of the television camera 7 by a calibration curve between the pointing direction of the built-in pointer 15 and the optical axis direction of the television camera 7,
The optical axis direction signal 18a of the television camera 7 calculated by the calculator 18 is displayed on the display 19 as an actual photographing angle (number) of the television camera 7 or as a figure. Here, the display device 19 may be provided independently, or may be displayed on the monitor 6 together with the in-furnace image. Of course, the rotary encoder 16 and the display 19 may not be provided, and only the pointer 15 may be provided.

In the above structure, the in-furnace observing apparatus 1 is inserted into the furnace through the insertion hole 31 provided in the furnace 30, and the object 32 in the furnace is observed with the observation window 4 oriented in a predetermined direction. Then, the mirror rotating arm 14 of the display device 10 is manually moved to rotate the rotating mirror 5 at a predetermined angle. As a result, the device 1 itself can be imaged in various directions while remaining in a fixed position. At that time, since the actual image pickup direction of the television camera 7 is displayed on the display device 10 or the display device 19,
The imaging direction can be accurately grasped from the outside.

FIG. 4 is a sectional view of an in-furnace observation apparatus of another embodiment. In the embodiments described below, the same parts as those of the embodiment shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 4, 20 and 21 are pulleys and 2
A belt 2 connects the two pulleys 20 and 21.
A rotating mirror 5 that is rotatable with the rotation of the pulley 20 is attached to the pulley 20, and a pointer 23 that rotates with the rotation of the pulley 21 is attached to the pulley 21.

In this apparatus, when the pointer 23 is rotated by an angle α to change the image pickup direction, the tip of the pointer 23 moves from the point B of the angle scale plate 25 of the display device 24 to the point B '. Become. Here, the pulley 20 and the pulley 21
Has a rotation angle ratio of 1: 2, and therefore pulley 2
The rotation angle α of 1 is transmitted to the pulley 20 by the belt 22 as the rotation angle α / 2. The angle α / 2 causes the image pickup direction to change from the initial point A to the point A ′ by the angle α, and the actual image pickup direction, that is, the optical axis direction of the television camera and the directivity direction of the pointer 23 become parallel. In this way, the operator can directly look at the actual imaging direction A ′ with the directivity direction B ′ of the pointer 23, and the operation can be easily performed.

FIG. 5 shows still another embodiment. Since the rotating angle α of the pointer is about ± 70 °, it is not necessary to use a circular pulley as in the embodiment shown in FIG. Two
6 and the pulley 27 are formed in a fan shape. The rotating mirror 5 is attached to the pulley 26, and the rotating mirror 5 is rotatably supported by a spring 28. The pulleys 26 and 27 have a rotation angle ratio of 1: 2 as in the embodiment shown in FIG. 29 is pulley 26 and 2
7 is a belt connecting the pulleys 7 and 7 and is fixed to the ends K ₁ and K _{2 of the} pulley 26 and the pulley 27, respectively. A stopper mechanism (not shown) is provided to prevent the pulleys 26 and 27 from rotating due to the tension of the spring 28. In addition, pointer 23
And the image pickup direction are the same as those described in the embodiment shown in FIG.

Although the television camera 7 is used as the observing means in the present embodiment, a fiberscope or the like may be used instead, and the imaging optical axis of the observing means is optically bent. A prism or the like can also be used as the optical device. Furthermore, mechanical drive means can be used to rotate the rotating mirror 5. Further, although the operating rod 9 and the belts 22 and 29 are connected to rotate the mirror, it is also possible to use a bendable reciprocating motion transmitting means such as a push-pull cable or a tension wire.

[0025]

As described above, the present invention includes the display device for displaying the image pickup direction of the observation means. Therefore, the imaging position does not become unclear as in the conventional case, the imaging direction can be accurately grasped from the outside, and the position confirmation at the time of repairing the furnace wall can be easily performed.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of an in-furnace observation apparatus.

FIG. 2 is an explanatory diagram for explaining a change in a display device and an image pickup area according to movement of a rotating mirror in the furnace observation device shown in FIG.

FIG. 3 is a circuit diagram for displaying a rotation angle on a display device in the in-furnace observation device shown in FIG.

FIG. 4 is a sectional view of another embodiment of the in-furnace observation apparatus.

FIG. 5 is a sectional view of another embodiment of the in-furnace observation apparatus.

[Explanation of symbols]

1 In-furnace observation device, 2 Water cooling jacket (protector), 3
Cooling tube, 4 observation window, 5 rotating mirror (optical device), 6
Monitor, 7 TV camera (observation means), 8 operating pin, 9 operating rod, 10 display device, 11 angle scale plate, 12 arm pin, 13 casing, 14 mirror rotating arm, 14a drive pin, 15 imaging direction pointer, 16 rotary Encoder, 17 amp, 18
Computing unit, 19 display unit, 20, 21 pulley, 22
Belt, 23 pointer, 24 display device, 25 angle scale plate, 26, 27 pulley, 28 spring, 29 belt,
30 furnaces, 31 insertion holes, 32 objects to be observed

Claims (1)

[Claims] 1. An observing unit arranged in a protector having a cooling function, an optical unit capable of optically bending an image pickup optical axis of the observing unit, and a mechanical position control of the optical unit. Observation: a member group capable of changing the imaging direction of the means,
An in-furnace observation apparatus comprising: a display device that displays the imaging direction of the observation means based on the operation amount of the member group.