JP4749019B2 - In-furnace inspection equipment for vertical furnaces - 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 comprises a camera, a camera operating mechanism, and a lifting platform provided with lighting, a moving rope that is attached to the lifting table and moves the lifting table up and down inside a vertical furnace, and a feed of the moving rope Vertical in-furnace inspection in a steel sheet continuous annealing line having a rope feed winding mechanism for winding, a remote control mechanism for operating the camera operating mechanism from outside the furnace, and an image monitor for displaying the image of the camera an apparatus, fixing the furnace top and hearth of the vertical furnace and two fixed frames into the open release was furnace top opening and the furnace bottom opening for fixing installed respectively, each said two fixed frames And having at least two guide ropes connecting the fixed frames, and a tension applying mechanism for applying tension to the guide rope, and passing the guide rope through a guide provided on the lifting platform, Stabilize the platform and move it up and down, and the camera operation mechanism rotates the illumination and the camera in the horizontal direction to display all objects in the furnace on the image monitor and inspect the inside of the vertical furnace. Is a vertical furnace inspection device.

  In the present invention, when a photographing apparatus such as a camera is hung with a wire in a vertical high-rise furnace and remotely inspected, the amount of shaking is extremely small even if the photographing apparatus 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 operating 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 having one end connected to the remote control mechanism 7 is lowered from the top of the furnace, and the other end 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 fixing 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 elevator 4 moves up and down through a guide rope 11 that is stretched vertically with almost no slack, so that the camera 1 is photographed in a state in which the camera 1 hardly shakes 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 operation 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, with this device, the operation of lowering only the guide rope aiming at the gap between the roll and piping 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)

Elevator with camera, camera operation mechanism, and lighting, moving rope that is attached to the elevator and moves the elevator up and down inside the vertical furnace, and feeding and winding the moving rope A vertical in-furnace inspection apparatus in a continuous annealing line for steel sheets, comprising a rope feed winding mechanism, a remote operation mechanism for operating the camera operation mechanism from outside the furnace, and an image monitor for displaying an image of the camera. ,
Two fixed frame for fixing installed respectively on said furnace top opening of the furnace top and hearth releases open the vertical furnace and the furnace bottom opening, is fixed to each of the two fixed frames the fixed frame The guide rope has at least two or more guide ropes connecting each other and a tension applying mechanism for applying tension to the guide rope. The vertical furnace is characterized in that the camera operating mechanism rotates the illumination and the camera in a horizontal direction so that all objects in the furnace are displayed on the image monitor and the inside of the vertical furnace is inspected. Internal inspection device.

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