JP4178580B2 - In-furnace inspection device for vertical continuous annealing furnace - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, large furnaces equipment, of the preferred equipment to inspect the particular furnace of the vertical continuous annealing furnace.
[0002]
[Prior art]
In general, in the internal equipment inspection work of large furnace facilities such as a vertical continuous annealing furnace, it is often a work at a high place without a scaffold.
In such an inspection work, an inspection worker directly enters the furnace by constructing a scaffold in the furnace or suspending a gondola from the top of the furnace to carry out the inspection work.
[0003]
Therefore, such inspection work in the furnace requires a long inspection time and a lot of costs.
[0004]
[Problems to be solved by the invention]
In this way, the inspection work using the scaffolding or gondola in the furnace first takes a lot of time for the preparation, and the inspection work itself becomes a long work in a poor environment. Cleaning up was time consuming.
In addition, from the viewpoint of safety, there are problems such as restrictions on the inspection range and inspection items.
[0005]
The present invention aims at providing a furnace point KenSo location of a vertical continuous annealing furnace to solve these problems.
[0006]
[Means for Solving the Problems]
The present invention includes a checking device body, a wire wind-up apparatus grate hanging the inspection apparatus main body by a wire made up of a position detecting device for detecting the position of the measured point inspection apparatus main body feed amount of the wire vertical An in-furnace inspection apparatus for inspecting a continuous annealing furnace, wherein the inspection apparatus body includes at least one illumination device that illuminates the interior of the furnace, a plurality of cameras that monitor the interior of the furnace, and each of the plurality of cameras A distance meter that measures the distance from the inspection apparatus main body at least at one location within the field of view of the laser, and a laser pointer that includes at least a location to be measured by the distance meter and points to a desired location within the field of view as a light spot of the laser beam; above is composed of a horizontal degree detector for monitoring the levelness of the inspection apparatus main body, the adoption of the vertical continuous annealing furnace furnace inspection apparatus characterized by being equipped with a housing Problems are than was resolved.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The vertical continuous annealing furnace to which the present invention is applied is a large furnace having a height of several tens of meters as shown in FIG. The furnace has a structure in which the heating tubes 13 are arranged in parallel, and a metal strip such as a steel strip is conveyed vertically between the heating tubes 13. The metal strip is conveyed while being sequentially folded by the in-furnace rolls 23a and 23b, and is heated.
[0010]
The inspection device main body 27 of the in-furnace inspection device of the present invention is suspended by a wire from a furnace top opening 24 opened in the upper part of the vertical continuous annealing furnace. In addition, a cable 11 that supplies power to the inspection apparatus main body 27 and exchanges signals is wired from the furnace bottom opening 25 to the outside. The cable 11 can be omitted by driving each device in the inspection device main body 27 with a battery and wirelessly transmitting and receiving signals output therefrom. It goes without saying that the cable 11 may be wired from the furnace top opening 24 together with a wire for suspending the apparatus.
[0011]
The details of the in-furnace inspection apparatus of the present invention are shown in FIG.
The inspection device main body 27 of the in-furnace inspection device is suspended by the wire 4, and is wound up and down by the wire winding devices 1a and 1b via the pulleys 3a and 3b.
The vertical movement amount of the inspection device main body 27 can be measured by the wire feed amount. For example, the feed amount is measured by counting the rotation of the roller in contact with the wire. Reference numeral 2 denotes a position detection device that measures the position of the inspection device main body 27 using the wire feed amount, and the height position of the inspection device main body 27 is measured.
[0012]
In the inspection device main body 27, the illumination device 5, the laser pointers 6 and 7, the camera 8, and the distance meter 9 are incorporated in the housing 12. Further, the levelness detector 10 is installed in order to confirm that the casing 12 of the inspection apparatus main body 27 is horizontal and adjust the monitor image to be described later to be horizontal. However, in FIG. 1, the monitor device for displaying the monitor screen is not shown.
[0013]
The functions of the illumination device 5, the laser pointers 6 and 7, the camera 8, and the distance meter 9 are as follows.
The illumination device 5 is configured to uniformly illuminate the visual field range of the camera 8.
A plurality of cameras 8 are installed as necessary. The optimum number of cameras may be determined and installed in consideration of the size of the target heating tube 13 and the field of view of the camera.
[0014]
In particular, when a plurality of cameras 8 are installed, it is possible to grasp the state of the object with a glance by combining and displaying the images from the plurality of cameras on a single monitor screen. As a result, the entire state of the heating tube 13 can be grasped in more detail. FIG. 1 shows a case where four cameras are installed as an example.
The distance meter 9 continuously measures the distance to the surface of the target heating tube 13. A plurality of distance meters 9 are installed in parallel as necessary. In FIG. 1, four distance meters are installed.
[0015]
The laser pointer 6 is provided in order to display marks at regular intervals on the screen displayed on the monitor. By visually recognizing the mark position on the screen, the deformation state of the heating tube can be qualitatively grasped.
Further, by applying image processing or the like, the amount of deformation can be measured quantitatively.
[0016]
The mark of the laser pointer 7 is adjusted to the distance measurement location of the distance meter 9. Therefore, it is possible to accurately grasp the location where the distance is measured on the monitor screen.
Next, FIG. 3 shows an example in which images from a plurality of cameras are combined and displayed on a single monitor screen. FIG. 3 is a diagram schematically showing a monitor screen.
[0017]
Here, the in-furnace inspection apparatus 27 shown in FIG. 1 is composed of four cameras 8, and displays the image visual field screens 31 to 34 from the four cameras in accordance with one monitor screen. ing. Each visual field screen is displayed with the magnification in the vertical direction as it is, and with the magnification compressed in the horizontal direction. Adjustments are made to match the joints of the screens. The adjustment method may be a method of adjusting and adjusting the vertical direction of each camera while looking at the screen, or the camera may be fixed and the image may be processed on the monitor screen to adjust the vertical direction. .
[0018]
Needless to say, if the images of individual cameras are displayed on the monitor, the detailed situation of each part can be grasped.
In FIG. 3, 36 and 37 are laser pointer marks. The reference numeral 36 is a reference point displayed on the monitor screen with the mark indicated by the laser pointer 6, and the reference numeral 37 is a reference mark indicated on the monitor screen with the mark indicated by the laser pointer 7.
[0019]
37 is also a measurement point of the distance meter 9 as described above, and the measured values are digitally displayed as distance display values 38 to 41, respectively. Reference numeral 35 denotes a height display value, which is displayed based on the measurement value of the position detection device 2. From these values, the deformation of the heating tube 13 can be grasped quantitatively.
Also, by recording this image, it is possible to reproduce and analyze it later.
[0020]
【Example】
As described above, it is possible to qualitatively grasp the state of deformation of the heating tube by observing the monitor screen, but for quantitative analysis, the output from the distance meter 9 is monitored. Detailed analysis is necessary.
Here, as one example, an analysis example of a three-dimensional profile of a heating tube is shown.
[0021]
FIG. 4 schematically shows distance meter outputs (waveforms) 46 to 49 in which distance signals from four distance meters installed are recorded in a recorder, and heating is performed along the moving direction of each distance meter. The tube profile is traced. Here, 51 to 54 are actual distances to the surface of the heating tube. Here, the shift in the position in the time direction from 51 to 54 indicates that the heating tube is curved. The 50 curve shown connecting the peak positions of 51 to 54 is the vertical curve of the heating tube, and shows its curved shape.
[0022]
Note that FIG. 4 is based on a schematic trace of the recorder, but it can also be displayed on the monitor screen at the same time.
FIG. 5 shows the distances 51 to 54 to the heating tube surface as distances from a straight line. Reference numeral 60 denotes a curved curve in the horizontal direction (that is, the depth direction) of the heating tube.
[0023]
It is possible to quantitatively grasp the three-dimensional bending of the heating pipe from the vertical bending curve 50 and the horizontal bending curve 60 of these heating pipes.
[0024]
【The invention's effect】
According to the present invention, it is possible to monitor and inspect the inside of the furnace safely, accurately, quickly and at low cost from outside the furnace.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an in-furnace inspection apparatus according to the present invention.
FIG. 2 is an explanatory view showing a state in which the in-furnace inspection apparatus is suspended in a vertical continuous annealing furnace.
FIG. 3 is a schematic diagram of a monitor screen displayed by camera output from an in-furnace inspection apparatus.
FIG. 4 is a schematic diagram displayed by the output of a distance meter from the in-furnace inspection device.
5 is a graph showing an offset display of peak heights 51 to 54 of the distance meter output in FIG. 4;
[Explanation of symbols]
1a, 1b Wire hoisting device 2 Position detection device
3a, 3b pulley 4 wire 5 lighting device 6, 7 laser pointer 8 camera 9 rangefinder
10 Horizontalness detector
11 Cable
12 housing
13 Heating tube
21 Vertical continuous furnace
23a, 23b In-furnace roll
24 Furnace top opening
25 Furnace bottom opening
27 Inspection device body
31-34 Image view from camera
35 Height display value
36, 37 Laser pointer mark
38 to 41 Distance display value
46-49 rangefinder output
50 Vertical curve of heating pipe
51-54 Distance to heating tube surface
60 Horizontal curve of heating tube

Claims (1)

  Inspection in a vertical continuous annealing furnace comprising an inspection device main body, a wire hoisting device that hangs the inspection device main body with a wire, and a position detection device that measures the feed amount of the wire and detects the position of the inspection device main body In-furnace inspection apparatus, wherein the inspection apparatus body has at least one illumination device for illuminating the interior of the furnace, a plurality of cameras for monitoring the interior of the furnace, and at least one in the field of view of each of the plurality of cameras. A distance meter for measuring the distance from the inspection apparatus main body at a location, a laser pointer that includes at least a position to be measured by the distance meter and points to a desired position in the field of view as a light spot of the laser light, and a level of the inspection apparatus main body An in-furnace inspection device for a vertical continuous annealing furnace, comprising a horizontality detector for monitoring the temperature, and mounted in a single casing.

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