JPH0643680Y2 - Hot observation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is directed to various types of furnace equipment, such as blast furnaces, hot blast stoves, mixed pig wheels, pots, converters, vacuum degassing furnaces, and furnace refractories in furnaces. The present invention relates to a hot observation device for observing a damage situation.

[Conventional technology]

In the above-mentioned various furnace equipment, since the refractory bricks constituting the furnace wall are worn out sequentially with long-term operation, the damage status of the refractory bricks in the furnace is constantly or It is important to observe regularly.

As the hot observation device, a dedicated observation device has been proposed or developed for each type of equipment and put into practical use. For example, as an apparatus for observing the inside of the furnace, in Japanese Patent Laid-Open No. 63-122933, a camera case is water-cooled with a double water cooling structure, a cooling gas is supplied to the inside of the case, and the camera is radiated from a glass surface. There is disclosed an observation device characterized by the above-mentioned glass structure in order to prevent internal damage of the glass. In this case, the position of the camera is fixed.

[Problems to be solved by the device]

However, the apparatus for in-furnace observation has excellent heat resistance,
Further, although it is relatively small and effective in a high temperature furnace, it is basically heavy in weight due to the water cooling structure, and manpower-operated is difficult. Further, since the position of the camera case is fixed, when the viewpoint is changed, it is necessary to adjust the direction and position of the entire device such as the camera and the case that houses the camera case, resulting in extremely poor operability.

Therefore, an object of the present invention is to be lightweight and highly portable, to be operated manually, and to facilitate the adjustment of the camera viewing axis direction.

[Means for Solving the Problems]

The above-mentioned problem is that a tip tube is fixed to the tip of a tubular member that serves as a handle, and a transparent window is provided in a part of the tip tube, and a camera that gazes outside through the transparent window is built into the tip tube. A hot observation apparatus, wherein the camera is housed in a camera case, and an illumination device whose irradiation direction is aligned with the line-of-sight direction of the camera is integrally attached to a side portion of the camera case, and the camera is provided. The distal end of the case is rotatably supported by a support member provided in the distal end tube, and a wire-like operation member connected to the base end of the camera case is passed through the inside of the tubular member to the outside of the hot observation device. The camera can be tilted only by pushing and pulling the wire-like operating member manually, and the cooling gas is supplied from the base end of the tubular member to the inner space of the hot observation device. And at the same time retirement can be solved by that so as to directly cool the camera by supplying a cooling gas into the camera case by a separate independent cooling gas supply passage.

[Action]

According to the present invention, a camera is housed in a camera case integrally provided with an illuminating device, a tip end portion of the camera case is rotatably supported, and a wire-like operation member connected to a base end portion of the camera case is provided. The tilt angle of the camera can be adjusted by manual operation from the outside. In this case, a driving means such as a cylinder can be used as the tilting means, but it is heavy and it is difficult to finely adjust the viewing direction. However, since the tilting motion is performed manually as in the present application, the device can be made lighter and more portable, and delicate angle adjustment can be easily performed. Further, since the camera case is integrally provided with the illumination device in which the line of sight of the camera is aligned with the irradiation direction, even if the line of sight of the camera is changed, the observation site can be automatically illuminated. Further, since it is pivotally supported at the tip of the camera case and is in a suspended state, it can be smoothly tilted by a small force by the above-mentioned wire-shaped operation member, and a range of tilt angles can be widened. The adjustment of the rotation direction with the longitudinal axis of the tubular member serving as the handle as the rotation axis is performed manually by a worker.

Further, in the present invention, the cooling gas is supplied from the base end of the tubular member to the inner space of the hot observation device to cool the whole body, and at the same time, the cooling gas is supplied into the camera case by a separate independent cooling gas supply passage. Cool the camera directly. In the case of this kind of hot observation device, the internal structure of the camera is likely to be damaged by the radiant heat at a high temperature at first, but according to the present invention, at the same time as cooling the entire observation device, the camera is particularly vulnerable to damage. The most rational and effective cooling can be achieved by supplying the cooling gas to locally cool the camera. In addition, since the tubular member serving as the handle is also cooled, the operator can operate the tubular member while holding it in his hand. Further, in the present invention, since the cooling gas is used as the cooling medium instead of the cooling water, the observation apparatus can be easily transported and operated by one person without any weight burden during inspection.

〔Concrete example〕

Hereinafter, the present invention will be described in more detail by way of examples with reference to the drawings.

FIG. 1 shows a hot observation apparatus according to the present invention, and FIG. 2 is a view taken along the line II-II of FIG.

A tip tube 2 having a built-in camera at the tip of the hot observation apparatus 1
Is provided. The front end of the tip tube 2 is cut obliquely, and the front closing plate 3 is attached to the oblique end face. The front blocking plate 3 is formed with gas vent holes 3a, 3a for the cooling gas supplied to the inside of the tip tube 2, and
An opening 3b is formed, and an L-shaped fixing piece 3c is provided over the entire outer peripheral portion of the opening 3b.
The heat resistant glass G is fixed by this fixing piece 3c.

Gas vent holes 3d are formed at appropriate intervals in the inner front cover plate 3 portion of the fixed piece 3c, and the cooling gas passing through the gas vent holes 3d is further divided between the fixed piece 3c and the heat-resistant glass G. Since the gap is sewn and flows outward, cooling around the heat-resistant glass G is effectively performed. Further, a heat-resistant material is wound on the inner and outer peripheral surfaces of the tip tube 2 and the inner and outer surfaces of the front blocking plate 3 excluding the glass G to improve heat resistance.

On the other hand, on the rear end side of the tip tube 2, a back surface closing plate 4 is attached to the tip tube 2 with bolts 4a, 4a. The back surface closing plate 4 is further provided with a first gas supply pipe 5 and a second gas supply pipe 6 which communicate with the inside of the tip cylinder 2 and serve as a handle. The first gas supply pipe 5 supplies cooling gas to the inside of the tip tube 2 through the supply pipe 5, and
It functions as an external communication pipe for a camera tilt angle adjusting wire 13, which will be described later, a signal cable 12a for the camera 8 and a power cable 12b for illumination. Further, the inspector can carry out the operation while holding the first gas supply pipe 5. The first gas supply pipe 5
For example, a gas pipe having a nominal diameter of 50 A can be used, and its length is preferably 2 m or more. Further, in order to insulate the heat, it is desirable to wind a heat resistant material like the tip tube 2.

On the other hand, the second gas supply pipe 6 is a gas pipe for supplying a cooling gas to the inside of the camera case surrounding the camera 8, as will be described later, and for example, a gas pipe having a nominal diameter of 8A can be used.

The supply amount of the cooling gas to the gas supply pipes 5 and 6 described above is appropriately determined in relation to the furnace temperature, but is preferably ³ Nm ³ / mi.
It is considered to be n or more.

Next, the camera support structure will be described in detail. In this specific example, the illumination 7 is arranged in parallel with the camera 8 so as to be integrally fixed, and these are moved integrally with each other.

In order to support the camera 8 and the illumination 7, there is provided a support member 10 extending in the longitudinal direction of the front end cover 2 from the back cover plate 4 and bent at the front end thereof toward the front cover plate 3. At the tip of the support member 10, the illumination 7 and the camera 8 are rotatably attached by a rotation shaft 10a.

The camera 8 has a camera case 9 as shown in FIG.
The illumination 7 is integrally fixed to the camera 8 in the same line-of-sight direction by a fitting fitting 9a fixed to the side of the camera case 9. As the camera 8, for example, a CCD color camera can be used. If the shape and dimensions are allowed, the glass G of the camera 8 and the illumination 7 may become unclear due to irregular reflection of illumination light, so it is desirable to use separate glass surfaces. Further, when the furnace temperature is high, for example, 600 ° C. or higher, no illumination is required.

A gas hose 11 is connected to the base end of the camera case 9 so as to communicate with the inside of the camera case 9, and the other end is a second end.
The camera 8 is connected to the gas supply pipe 6, and the cooling gas is supplied to the inside of the camera case 9 through the gas hose 11.
Is protected against heat.

A connecting fitting 9b is provided on the bottom of the camera case 9, and a tilting angle adjusting wire 13 constituting an operating member according to the present invention is connected to the connecting fitting 9b. The other end of the tilt angle adjusting wire 13 slides through the guide 13a, passes through the first gas supply pipe 5, and is communicated with the outside. Similarly, the signal / power cables 12a and 12b from the camera 8 and the illumination 7 are also communicated to the outside through the first gas supply pipe 5, and the signal cable 12a is connected to the monitor 14 installed outside. It is connected.

In the apparatus configured as described above, the tilt adjustment of the camera 8 and the illumination 7 is performed by pushing and pulling the tilt angle adjusting wire 13 manually by an inspector manually. For example, when the tilt angle adjusting wire 13 is pulled out, the camera 8 and the illumination 7 rotate about the rotation axis 10a,
Fig. 1 The position of the virtual line is changed to the position of the solid line, the tilt angle θ with respect to the horizontal line becomes smaller, and conversely the tilt angle adjustment wire
When 13 is pushed in, the camera 8 and the illumination 7 tilt so that the tilt angle θ becomes large.

On the other hand, the tilt angle adjusting wire 13 is penetrated by a wire holding device 15 provided in the first gas supply pipe 5, is attached to the holding device 15, and is rotated by a bolt 15a which is moved forward to rotate the tilt angle. The adjustment wire 13 is fixed by the tip surface of the bolt 15a and held at a predetermined position.

In operating the device 1 of the present invention, as shown in FIG. 6, the inspector uses the first gas of the hot observation device 1 through a hole of, for example, about 250 φ opened in the side manhole of the hot air stove. Having the supply pipe 5 part, inserting the tip tube 2 into the furnace, adjusting the viewing direction of the camera 8, that is, adjusting the amount of rotation of the observation device 1 itself around the longitudinal axis (hereinafter referred to as the lance rotation azimuth angle) and the camera. While the tilt angle of 8 is adjusted, the inside of the monitor 14 is observed.

Regarding the cooling of the tip tube 2, as described above, in addition to the overall cooling by the cooling gas supplied inside the tip tube 2, local cooling by the cooling gas supplied inside the camera case 9 is performed while the inside of the high temperature furnace is cooled. Observing the state of damage to the wall surface, if it is desired to further improve the cooling efficiency, for example, dry ice can be put inside the tip tube 2 to temporarily strengthen the cooling. As the cooling gas, it is possible to use air, particularly dry air (to prevent fogging of the glass surface), and nitrogen gas or the like.

〔Example〕

Using the hot observation apparatus 1 shown in the above-mentioned specific example, the state of brick pile damage around the connecting pipe 51 leading to the heating chamber 52 of the hot stove heat storage chamber 50 shown in FIG. 3 was inspected.

A 250φ hole was bored by a core drill in the existing manholes HS1 and HS2 of the hot-air stove heat storage chamber 50, and the state of brick pile damage around the connecting pipe 51 was observed through this hole. The observation is performed during the slow cooling period of the hot air stove, and the temperature inside the furnace is 200 to 4 during that period.
It was 00 ° C. The observation site is A shown in FIG.
4 points from D point to 4 points. Point A is the upper end of the connecting pipe 51 inlet, B
And points D are the left and right ends of the inlet of the connecting pipe 51, and point C is the lower end of the inlet of the connecting pipe 51.

Next, the adjustment of the viewing direction of the camera 8 when the hot observation device 1 shown in the above-mentioned specific example is inserted into the heat storage chamber 50 through the manholes HS1 and HS2 for observation will be described geometrically.

First, regarding the coordinates, in the geometric plan view shown in FIG. 4, when the tip cylinder 2 is the origin O, the horizontal direction is the X axis, the vertical direction is the Y axis, and the direction penetrating the paper surface is the Z axis, the above-mentioned A to
The coordinates (x, y, z) of the point D are the values shown in Table 1 from the manufacturing drawings and the like. When the coordinates of the observation point are known, the lance rotation azimuth angle ψ and the tilt angle θ of the camera 8 are determined by calculation.

The calculation calculation of the camera viewing direction angles ψ and θ will be described below with reference to FIG.

The circle shown in FIG. 5 represents the coordinate system on the XZ plane, and when the camera installation coordinate is O and the observation point coordinate is P, the lance rotation azimuth angle ψ is expressed by the following equation (1) from (x, z). ).

ψ = tan ⁻¹ (z / x) (1) The observation point P exists on the OP plane that is obtained by rotating the observation device 1 counterclockwise by ψ. Therefore, if the rotational azimuth angle ψ of the lance is determined by the above calculation, the camera tilt angle θ is represented as θ in the figure of the OP axis-Y coordinate shown in the upper part of FIG. Therefore, this tilt angle θ is determined by the following equation (2) from (r, y).

θ = tan ⁻¹ (r / y) (2) The visible range m of the camera 8 is calculated by the lens aperture if the distance 1 from the origin O to the observation point P is calculated.

By the above calculation, the rotation azimuth angle ψ regarding the points A to D
Although the tilt angle θ is determined, in the actual inspection operation, the observation device 1 described above cannot accurately measure and adjust the angle. I don't get. However, when the observation device 1 is manufactured, it is necessary to set the tiltable range of the camera 8, and it is important to perform the above-described calculation in order to grasp the visible range m. Table 1 shows a list of calculation results for the rotation azimuth angle ψ, the tilt angle θ, and the visible range m of the observation points A to D.

As is clear from Table 1, the heat storage chamber 50 in this example.
When observing, the required tilt angle range θ of the camera 8 is 20-
Since it is 76 °, in this specific device 1, θ = 20 to 76
It was manufactured so that it could be tilted in the range of °, and it was possible to observe well within this tilting range.

[Effect of device]

As described above in detail, according to the present invention, it is lightweight and highly portable, can be operated by human power, and is easy to adjust the visual axis direction of the camera.

[Brief description of drawings]

FIG. 1 is a view showing a hot observation device according to the present invention, FIG. 2 is a view taken along the line II-II of FIG. 1, and FIG. 3 is hot air for observing the damage situation of bricks by the device of the present invention. FIG. 4 is a vertical cross-sectional view of the stove heat storage chamber, FIG. 4 is a plan view for geometrically explaining the observation point position in the hot stove heat storage chamber shown in FIG. 3, and FIG. FIG. 6 is a geometrical explanatory view for explaining ψ and the tilt angle θ of the camera, and FIG. 1 ... Hot observation device, 2 ... Tip cylinder, 3 ... Front blocking plate, 4 ... Rear blocking plate, 5 ... First gas supply pipe, 6 ...
Second gas supply pipe, 7 ... Lighting, 8 ... Camera, 9 ... Camera case, 10 ... Supporting hardware, 11 ... Gas hose, 12a
...... Signal cable, 12a ...... Power cable, 13 ...... Tilt angle adjustment wire, 14 ...... Monitor, G ...... Heat-resistant glass

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Seiji Kanazawa, 3rd light, Oshima, Kashima-cho, Kashima-gun, Kashima-gun, Ibaraki Sumitomo Metal Industries, Ltd. Kashima Steel Works (72) Shigeru Shishido, 3rd light, Oshima, Kashima-machi, Kashima-gun, Ibaraki Prefecture Sumitomo Kinzoku Kogyo Co., Ltd. Kashima Steel Works (56) Reference JP-A-63-122933 (JP, A) JP-A-60-162181 (JP, A) JP-A-62-56780 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A tip tube is fixed to the tip of a tubular member as a handle, and a transparent window is provided in a part of the tube, and a camera is built in the tip tube to gaze the outside through the transparent window. A hot observation device, wherein the camera is housed in a camera case, and an illumination device whose irradiation direction is aligned with a line-of-sight direction of the camera is integrally attached to a side portion of the camera case, and The distal end portion of the camera case is rotatably supported by a support member provided in the distal end tube, and a wire-shaped operation member connected to the proximal end portion of the camera case is passed through the inside of the tubular member to provide a hot observation device. The camera can be tilted only by pushing and pulling the wire-shaped operating member manually, and the cooling gas is supplied from the base end of the tubular member to the inner space of the hot observation device. And simultaneously retirement, separately independent hot observation device is characterized in that so as to directly cooled by the cooling gas supply passage said camera by supplying a cooling gas into the camera case.