JPH0560473A - Observing device for inside of furnace - Google Patents

Abstract

PURPOSE:To obtain an observing device for the inside of a furnace, which is inexpensive and highly reliable without necessitating any special facility, by a method wherein problems of enlarging and complicating of the whole of the device are eliminated. CONSTITUTION:The substatially sealed type main body 1 of the title device is provided with a mirror 4, inclinably supported through a gas spring 6 contractable by the pressure difference between the outside and inside of the furnace, as well as an observing means 7, picking up an image in the furnace which is reflected by the mirror 4, which are accommodated in the main body, and an obsreving window 10, directed to the mirror 4. Further, the title device is provided with a gas supplying means 8, supplying pressure gas to the main body 1 of the device.

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 and various things inside the furnace.

[0002]

2. Description of the Related Art The lining of refractory bricks, etc., applied to the inside of the iron skin of a blast furnace, etc., gradually wears down 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 the blast furnace and to judge whether repair is necessary or not, an in-reactor observation device capable of directly observing the state inside the blast furnace during operation is used.

[0003] Conventionally, as such an in-reactor observation apparatus, there is known one in which a mirror is provided so as to be directed to the observation window and a television camera for picking up an image reflected in the mirror is built in. For example, in Japanese Utility Model Publication No. 57-46360, a remote rotary mount is provided at the bottom of an airtight container having a transparent peephole at the bottom, and a rotary mirror is pivotally supported on the rotary mount so as to be horizontally rotatable and tiltable. However, there is described a structure in which a wall surface light projecting device is provided below this image mirror, and a wall surface image reflected on the image mirror is captured by an image pickup 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 checked. The survey can be carried out reliably, and the repair timing and the repair contents can be accurately grasped.

[0005]

However, in this observation device, a mechanical elevation device such as an electric cylinder is used to adjust the reticle to a predetermined angle. Therefore, the entire device is large. It has become complicated and complicated, and in combination with its use at high temperatures, it is a cause of frequent failures. further,
Many wiring cables are required for remote control of the elevation device, which hinders free observation by the in-reactor observation device.

An object of the present invention is to solve the problems of the enlargement and complication of the whole apparatus in the conventional in-reactor observing apparatus and to provide an inexpensive and highly reliable furnace without requiring special equipment. It is to provide an internal observation device.

[0007]

In order to achieve the above-mentioned object, the in-furnace observation apparatus of the present invention includes a mirror supported tiltably via a gas spring which expands and contracts due to a pressure difference from the outside, and the mirror. In addition to having a built-in observation means for capturing an image of the inside of the furnace, a substantially sealed apparatus body having an observation window directed to the mirror, and gas supply means for supplying pressurized gas to the apparatus body were provided. Is characterized by.

[0008]

According to the in-furnace observation apparatus of the present invention, by adjusting the pressure of the gas supplied from the gas supply means, the gas spring built in the apparatus body expands and contracts, and the angle of the mirror showing the observation position changes. To do.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The features of the present invention will be specifically described below with reference to the embodiments shown in the drawings.

FIG. 1 is a perspective view showing the appearance of the apparatus main body and the supporting rod of the in-furnace observing apparatus. The apparatus main body 1 is formed as a substantially hermetic container, and a supporting rod 2 is connected to the container. There is. The support rod 2 has a control cable pipe 2a for a camera or the like and a cooling gas introduction pipe 2b built therein, and a cooling water introduction passage 2c is provided between an inner peripheral surface of the support rod 2 and an outer peripheral surface of the introduction pipe 2b. There is. Reference numeral 3 denotes a transparent observation window for observing the inside of the furnace. The transparent observation window 3 is formed by combining a plurality of heat-resistant glasses such as quartz glass, and the cooling gas sent from the cooling gas introduction pipe 2b is injected to prevent high heat. It prevents devitrification and damage.

FIG. 2 is a cross-sectional view showing an outline of the inside of the apparatus main body 1. At the bottom of the apparatus main body 1, a mirror 4 directed to the observation window 3 (the mirror in the present invention is a normal plate-like member). The above-mentioned is not only a mirror but also a prism capable of changing the angle of the image, etc.) is pivotally supported at one end by a rotary shaft 5, and the angle of the mirror 4 is adjusted at the other end. A gas spring 6 capable of being attached is attached. In the present embodiment, it is pivotally supported by the rotating shaft 5, but it can also be supported so as to be tiltable without using the shaft.

As shown in the sectional view of FIG. 3, the gas spring 6 is slidable in the cylinder body 6a, which is attached to the apparatus body 1 and has a closed cylinder body 6a having an opening 6b on the side. And a rod 6d connected to the sealing lid 6c, the other end of which is connected to the sealing lid 6c.
It is attached to the back of. A gas having a constant pressure P ₁ is previously filled in the internal space 6e of the cylinder body 6a, and the volume of the internal space changes due to the pressure difference from the external atmospheric pressure P _0. 6
It is configured to slide back and forth in a. P ₀ is P
_When it is larger than _1, it becomes the observation range shown by the broken line α in FIG. 2. On the contrary, when P ₁ is larger than P ₀ , the rod 6d extends and the mirror 4 rotates about the rotation axis 5, Solid line β
The observation range is indicated by. In this way, the external atmospheric pressure P ₀ can be appropriately adjusted by the cooling mechanism 8 described later to change the observable range steplessly.

Reference numeral 7 shown in FIG. 2 is a television camera as an observing device for picking up an image of the furnace reflected on the mirror 4.
It is connected to the monitor 9 outside the furnace shown in FIG. 5 by the wiring cable in the cable pipe 2a shown in FIG. The television camera 7 has a built-in zoom device, and can be clearly observed even from a position distant from the observation point.

Further, the apparatus main body 1 has a heat insulating material 11 lined inside a metal container, and a water jacket 12 through which cooling water circulates is provided inside the heat insulating material 11.

A pressure gas for cooling and for adjusting the angle of the mirror 4 is introduced into the apparatus main body 1 through the introduction pipe 2b. FIG. 4 shows an example of the cooling mechanism 8 as a gas supply means for introducing the pressure gas for cooling. It is mainly composed of an air regulator (pressure reducing valve) 8a and a pressure gauge 8b, is connected to the cooling gas introducing pipe 2b, and can freely control the amount and pressure of the cold air supplied into the apparatus main body 1. In addition, 8c is an auto drain and 8d is a stop valve. The pressure cooling gas cools the inside of the apparatus main body 1,
It is ejected from the cooling gas ejection hole 13 provided outside the observation window 3,
The observation window 3 is purged.

FIG. 5 shows an example of use of the in-furnace observation apparatus configured as described above. The apparatus body 1 of the in-reactor observation apparatus is inserted through the observation hole 10 of the furnace wall W, and the observation window 3 is moved in a predetermined direction. The inside of the furnace is observed by the monitor 9. At that time, a pressure gas is introduced into the apparatus main body 1 from the cooling mechanism 8 and the angle of the mirror 4 is changed so that a desired observation position can be observed.

As described above, the in-furnace observation apparatus of this embodiment is
The angle of the mirror is adjusted by using the pressure gas of the cooling mechanism which is naturally required as a device for protecting the internal equipment from the high temperature in the furnace. For this reason, unlike the conventional device using the electric cylinder and the actuator, a complicated structure is not necessary, and the occurrence of failures is drastically reduced. Furthermore, since no special equipment is required, the manufacturing cost can be reduced.

The in-furnace observation apparatus of the present invention is not limited to the above-mentioned embodiment. For example, an elevating device is provided,
You can hang the in-furnace observation device from the upper part of the furnace,
Further, a light projecting device for illuminating the observation position in the furnace may be built in the device body 1.

[0019]

As described above, in the in-furnace observing apparatus of the present invention, the tilt of the mirror showing the observation position is adjustable by the gas spring. Therefore, unlike the electric cylinders and actuators used in the conventional device, a complicated mechanical structure is not required, and the occurrence of failures can be drastically reduced.

Further, the size of the entire apparatus can be reduced, and the heat receiving area is reduced accordingly, so that the cooling mechanism can be simplified.

[Brief description of drawings]

FIG. 1 is a perspective view showing appearances of a device body and a support rod of an in-furnace observation device.

FIG. 2 is a schematic cross-sectional view of the inside of the apparatus main body.

FIG. 3 is a sectional view of a gas spring.

FIG. 4 is an explanatory diagram of a cooling mechanism.

FIG. 5 is an explanatory diagram showing a usage example of the furnace observation device.

[Explanation of symbols]

 1 Device Main Body 2 Support Rod 2a Cable Piping 2b Cooling Gas Introducing Pipe 2c Cooling Water Introducing Path 3 Observation Window 4 Mirror 5 Rotating Axis 6 Gas Spring 6a Cylinder Body 6b Opening 6c Sealing Lid 6d Rod 6e Internal Space 7 Television Camera (Observation device) 8 Cooling mechanism (Gas supply means) 10 Observation hole 11 Heat insulating material 12 Water jacket 13 Jet hole W Furnace wall

Claims (1)

[Claims] 1. An observation apparatus which has a mirror tiltably supported by a gas spring which expands and contracts due to a pressure difference with the outside and an observation means for taking an image of an inside of a furnace reflected on the mirror, and which is directed toward the mirror. An in-furnace observing apparatus comprising: a substantially hermetically-sealed apparatus main body having a window; and gas supply means for supplying a pressure gas to the apparatus main body.