JP2006284105A - In-furnace inspection device for vertical furnace - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a remote inspection device simple and easy to handle in working for visually inspecting the inside of a vertical furnace installation while clearly and accurately observing the inside wall of a vertical furnace. <P>SOLUTION: Fixing frames are installed in a furnace top opening portion and a furnace bottom opening portion of the vertical furnace, and a plurality of guide ropes having tension applying mechanisms are arranged between the two fixing frames. The guide ropes are passed through a guide provided on a lift plate so that the lift plate is stably movable up and down. Thus, the image of a camera installed on the lift plate is observed to inspect the inside of the vertical furnace. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

The present invention relates to an apparatus for visually inspecting the inside of a large vertical furnace facility, and relates to a remote inspection apparatus that can inspect the inside of the furnace easily and accurately.

For example, inspection work inside a vertical high-rise furnace facility in a continuous annealing line for steel sheets in a steel manufacturing plant is generally performed by building a scaffold in the furnace or hanging a gondola from the top of the furnace. Enters the furnace directly and is visually inspected. Such inspection work inside the furnace having a height of 20 m is carried out within a repair period in which the continuous annealing line is stopped. However, it takes a lot of time to include preparation and clean-up. As a result, the repair period could become a bottleneck. In addition, the inspection work itself is a long work in a high environment in a poor environment, and the load on the workers is also a big problem.
As one of the work improvement measures, for example, Patent Document 1 discloses a method for remotely inspecting an imaging device such as a camera by suspending it with a wire.
JP-A-11-279622

However, in such a conventional remote inspection method, since the camera is taken up and down in a suspended state with a long wire, the image is observed with the camera swinging left and right, and accurate inspection is performed. In addition, there is a problem that when the inspection operator observes the image, the eyes are tired and workability is poor.
In order to prevent the camera from shaking, the method of taking a picture by fixing it to a stick or the like and taking it down from the top of the furnace makes the apparatus large, and the rolls and pipes in the furnace become in the way, which makes handling difficult.
It is an object of the present invention to provide a remote inspection device that solves these problems of the prior art and that allows a clear and clear observation of the walls in a vertical furnace by a simple and easy-to-use method.

  The present invention includes a camera, a camera operation mechanism, and an elevator with illumination, a moving rope that is attached to the elevator and moves the elevator up and down, and a rope feed that feeds and winds the moving rope A vertical furnace inspection facility comprising a winding mechanism, a remote control mechanism for operating the camera operation mechanism from outside the furnace, and an image monitor for displaying an image of the camera, the top opening of the vertical furnace Two fixed frames that are respectively installed and fixed to the furnace part and the furnace bottom opening, at least two guide ropes connecting the two frames, and a tension applying mechanism that applies tension to the guide ropes, A vertical furnace inspecting apparatus characterized in that the guide rope is passed through a guide provided on the elevator base, the elevator base is stabilized and the inside of the vertical furnace is inspected. It is.

  In the present invention, when a camera or other imaging device is hung with a wire in the vertical high-rise furnace for remote inspection, the amount of shaking is extremely small even if the imaging device is moved up and down in order to inspect the entire furnace interior. As a result, it is possible to inspect images close to a stationary state, greatly improving inspection accuracy, reducing fatigue during monitor observation, and improving workability. .

  The present invention is applied to, for example, inspecting the inside of a vertical high-rise furnace facility in accordance with repair work performed by stopping operation for maintenance of equipment in a continuous annealing line of steel sheets, The present invention provides an apparatus for use in a state in which the opening at the top and bottom of the furnace is opened when the temperature in the furnace is lowered after the operation is stopped.

FIG. 1 is a configuration diagram showing an embodiment of an in-furnace inspection apparatus for a vertical furnace according to the present invention. Moreover, FIGS. 2-5 is a figure explaining the attachment method of this invention apparatus in steps, It demonstrates in detail using these.
FIG. 2 is a diagram illustrating the first stage. The upper fixed frame 9 is installed in the furnace top opening 15. A pulley 14 is fixed to the upper fixed frame 9, and the moving rope 5 is passed therethrough. The moving rope 5 can be moved up and down in the furnace by the rope feed winding mechanism 6, and the moving rope 5 is lowered by the feeding operation so that the tip reaches near the furnace bottom.
FIG. 3 shows a state in which the leading end of the moving rope 5 reaches the furnace bottom in the second stage, and the guide rope 11 having one side fixed to the upper fixing frame is hung down to the furnace bottom.

FIG. 4 is a diagram showing a third stage, in which a lifting / lowering table 4 provided with a camera 1, a camera operation mechanism 2, an illumination 3 and the like is installed at the tip of the moving rope 5 and installed on the lifting / lowering table 4. Pass the guide rope 11 through the guide 13. Also, the video cable 18, one of which is connected to the image monitor 8, is lowered from the top of the furnace, and the other is connected to the camera 1. Similarly, the control cable 19, one of which is connected to the remote control mechanism 7, is lowered from the furnace top, and the other is connected to the camera operating mechanism 2.
FIG. 5 is a diagram showing the final stage. First, the elevator 4 is raised above the furnace bottom opening 16 while being wound by the feed winding mechanism 6 via the moving rope 5. Thereafter, the lower fixed frame 10 is installed in the furnace bottom opening 16. The guide rope 11 is fixed to the lower fixed frame 10, and the slack of the guide rope 11 is minimized by the tension applying mechanism 12. The apparatus of the present invention mounted in this way is shown in FIG. 1, and the elevating platform 4 moves up and down through a guide rope 11 stretched vertically with little slack, so that the camera 1 is photographed in a state where the camera 1 hardly sways in the horizontal direction. Is possible. Accordingly, if the camera 1 is moved up and down by the rope feed take-up mechanism 6 and the camera 1 is rotated and moved in the horizontal direction by the remote control mechanism 7, all objects in the furnace can be displayed on the image monitor 8, Thereby, the inspection in the furnace can be performed with high accuracy.

  In addition, the interior of a vertical high-rise furnace in a continuous annealing line for steel sheets in a steel manufacturing plant has a roll through which the steel sheet passes, and a number of heating pipes are installed, which is as high as 20 m. Then, it was very cumbersome to move the camera up and down between these obstacles, and it was very nervous in order not to damage the equipment. However, in this device, the operation of lowering only the guide rope aiming at the gap between the roll and the pipe is a simple method without using nerves, and moving up and down through the fixed guide rope shakes the camera etc. to the peripheral equipment. You don't have to worry about hitting it. Furthermore, changing the position where the guide rope is lowered is simple and efficient.

In the above embodiment, an example in which two guide ropes are used is shown, but any number of guide ropes 11 may be used as long as there are two or more. The camera 1 may be a wireless camera. In that case, the video cable 18 becomes unnecessary. The operation of the camera operation mechanism 2 by the remote operation mechanism 7 may be performed by a wireless method. In that case, the control cable 19 becomes unnecessary.
In the actual example, the guide ropes were fixed by installing the frames on the furnace top and the furnace bottom, respectively, but any method that can be easily fixed and can apply tension to the guide ropes is similar to the present invention. The effect can be obtained. For example, instead of the fixed frame 10 installed in the furnace bottom opening 16, the lifting platform is stabilized even if a weight is installed on the floor surface below the furnace bottom opening and the guide lobe is fixed. However, it is clear that the present invention is more stable.

It is a schematic diagram which shows one Example of the vertical furnace inspection apparatus which concerns on this invention. It is explanatory drawing which shows the 1st step of the attachment method of this invention apparatus. It is explanatory drawing which shows the 2nd step of the attachment method of this invention apparatus. It is explanatory drawing which shows the 3rd step of the attachment method of this invention apparatus. It is explanatory drawing which shows the last step of the attachment method of this invention apparatus.

Explanation of symbols

1: Camera 2: Camera operation mechanism 3: Lighting 4: Lift platform 5: Moving rope 6: Rope feed winding mechanism 7: Remote operation mechanism 8: Image monitor 9: Upper fixed frame 10: Lower fixed frame 11: Guide rope 12: Tension applying mechanism 13: Guide 14: Pulley 15: Furnace top opening 16: Furnace bottom opening 18: Video cable 19: Control cable

Claims (1)

A camera, a camera operation mechanism, and an elevator with illumination, a moving rope that is attached to the elevator and moves the elevator up and down, and a rope feed winding mechanism that feeds and winds the moving rope A vertical in-furnace inspection facility having a remote control mechanism for operating the camera operation mechanism from outside the furnace, and an image monitor for displaying an image of the camera,
Two fixed frames that are respectively installed and fixed at the furnace top opening and the furnace bottom opening of the vertical furnace, at least two guide ropes connecting the two frames, and tension on the guide rope A vertical in-furnace inspection apparatus comprising: a tension applying mechanism, wherein the guide rope is passed through a guide provided on the lifting platform, and the lifting platform is stabilized to inspect the interior of the vertical furnace.

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