JPH0565553B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inspection method used when inspecting the damage state of a wall of a coke oven carbonization chamber or a combustion chamber.

Due to their high heat load, coke ovens are currently constructed primarily from refractory bricks. However, after years of use, various parts of the coal become damaged due to external mechanical forces, thermal stress, moisture content of the charged coal, and other factors. Especially the carbonization chamber wall,
It is easy to be damaged due to the concentration of effects based on the various factors mentioned above. If such damage occurs, mortar must be sprayed onto the damaged area, or if the damage is severe, the refractory bricks must be replaced. For this reason, it is necessary to inspect whether or not damage has occurred to the walls of the carbonization chamber or combustion chamber, and it is also desirable to be able to accurately grasp the damaged location and situation so that it can be repaired and directly connected.

Conventionally, in order to discover such damaged areas, an artificial method was used in which the interior of the carbonization chamber was looked into through the kiln opening or charging port of the carbonization chamber, or through the peephole in the combustion chamber. Therefore, it is not easy to discover and accurately understand the damaged parts, and furthermore, it is not preferable to perform manual inspections in places with poor working conditions such as high temperatures.

The present invention has been made in view of the above circumstances, and provides a coke oven carbonization chamber or a coke oven carbonization chamber that can be observed and inspected outside the furnace using an optical fiber, and can accurately identify damaged areas. A method for inspecting a combustion chamber wall is provided.

The inspection method of the present invention uses an optical system consisting of an optical fiber and a condensing section provided at its tip,
An optical system having this optical fiber is inserted into a carbonization chamber or a combustion chamber, and an image of the wall surface of the carbonization chamber or combustion chamber is focused on the tip surface of the optical fiber by a condenser, and this image is transmitted by the optical fiber. Then, at the other end located outside the furnace, inspection is performed by observing with an eyepiece, observing with a monitor television, and taking photographs. Moreover, by knowing the absolute position of the wall surface of the carbonization chamber or combustion chamber being inspected based on the height of the light condensing part and the insertion distance into the carbonization chamber or combustion chamber, it is possible to determine the relationship with the absolute position of the wall surface. It is designed so that it can be inspected.

The detailed content of the method of the present invention will be described below based on an embodiment of an inspection apparatus that employs the method of the present invention. Figures 1 to 6 are diagrams showing an example of the above embodiment, of which Figure 1 is a front view and Figure 2 is a front view.
Figure 3 is a plan view of the portion above the operating table, which will be described later. Figure 4 is a diagram showing a lance containing an optical fiber etc. inserted into the carbonization chamber. The figure is a sectional view taken along the line -- in FIG. 4, and FIG. 6 is an enlarged longitudinal sectional view of the tip of the lance. 1 to 3, 1 is a lance for holding an optical system consisting of a light condensing part and an optical fiber, 2 is a reinforcing rib for the lance, and 3 is a lance for holding an optical system.
is the side roller, 4 is the operating table, 5 is the bearing, 6
are a rack 6a and a pinion 6b used when inserting the lance 1 into an object to be inspected (for example, a carbonization chamber);
By rotating the pinion 6b and moving the rack 6a fixed to the lance 1 back and forth, the lance 1
Move forward and backward. 7 is a wire, 8 is a camera placed at the rear end of the lance 1, 9 is an anchor,
10 is a tilting gear used when tilting the lance 1, 11 is a motor that rotates the gear 10, 12 is a hydraulic cylinder used to move the operating table 4 up and down, 13 is a heat shield wall, and 14 is an air tank. , 15 is a running wheel, 16 is a running motor,
17 is a cooling water tank, 20 is an oil tank, 21 is a monitor television, and 22 is a control board.

The interior of the lance 1 and the tip portion of the lance 1 shown in FIG. 4 have a structure as shown in FIGS. The infrared cut filter 26 is an air blowing nozzle connected to the air tank 14 described above. 28 is a heat insulating material, 29 is a cooling water supply pipe, 30 is a cooling water recovery pipe, and these pipes are connected to the cooling water tank 17. 31 is a light guide made of an optical fiber bundle; 32 is an image guide made of an optical fiber bundle; 33 is a lens constituting a condensing section;
34 is a reflecting mirror.

Next, a description will be given of an inspection using the inspection apparatus having the structure described above. First, the traveling motor 16 is driven to move the inspection device to the front of the kiln opening on the coke side or extrusion side of the carbonization chamber to be inspected. Thereafter, the hydraulic cylinder 12 is operated to move the operating table 4 up and down, and the motor 11 is driven to adjust the inclination of the lance 1 to hold the lance 1 at a predetermined height in a horizontal state. Subsequently, the pinion 6b is rotated to advance the lance 1, and the lance 1 is inserted into the carbonization chamber through the kiln opening as shown in FIG. In other words, the opening 1a formed at the tip of the lance 1 is the carbonization chamber 40.
It is now positioned facing the wall surface 41 to be inspected. Here, illumination light is applied through the light guide 31 to illuminate the wall surface 41. The reflected light from the wall surface 41 passes through the viewing window 24 and further passes through the infrared filter 25.
after passing through and being reflected by the reflecting mirror 34, the imaging lens 3
3, an image of the wall surface 41 is formed on the end surface 32a of the image guide 32. The image formed on the end surface 32a of the image guide 32 is transmitted to the other end through the image guide 32. The transmitted image is photographed by a camera 8 for observing the inside of the furnace. It is also observed on the monitor television 21. Instead of observing on a monoter television, observation may be performed through an eyepiece. In this way, the condition of the wall surface of the carbonization chamber can be observed outside the chamber, and damaged areas can be immediately detected. Furthermore, the position being inspected can be determined by the height of the lance 1 (more precisely, the condensing part) and the distance at which it is inserted.

For example, if you set the height of lance 1 to a constant value y ₁ by setting the control table to a constant height, move lance 1 forward, and find the distance x ₁ from the kiln mouth to the detection point from the amount of movement. , y ₁ and x ₁ can determine the observation point on the wall surface. Therefore, after adjusting the height of the operating table 4 using the hydraulic cylinder 12 to determine _y1 , the lance 1 is advanced to perform scanning in the x direction. In this way, after the observation of all parts of the wall with a height of y ₁ is completed, the height of the operating table 4 is changed to y ₂ , and in the same way x at the height y ₂ is
Observe all parts of the direction. By changing the value of y in this manner, scanning is performed in the x direction, and scanning is performed for all heights y.

In addition, since damage to the wall surface mainly occurs at the joints, if the joint positions are memorized in the computer and the hydraulic cylinder 12 and pinion 6b are operated so that the light condensing section travels over the joints, inspection can be carried out. The time can be significantly reduced.

As a result of observing all the walls of the coking chamber as described above, if a damaged part is found, the x and y values of that part can be calculated based on the aforementioned lance insertion distance and the height of the operating table. By determining the location of the damage, it is possible to accurately determine the location of the damage.

A cooling water supply pipe 29 and a cooling water recovery pipe 30 are arranged inside the lance 1, and cooling water is supplied from the cooling water tank 17 through the supply pipe 29 and recovered from the recovery pipe 30, so that the light guide 31 and the image The guide 32 and the like are cooled and therefore will not be damaged even if the lance 1 is inserted into the hot carbonization chamber.

Furthermore, the bricks and the joints in the carbonization chamber both have the same level of brightness and may be difficult to distinguish. In that case, by blowing gas through the air blowing nozzle 26 onto the wall surface of the carbonization chamber from an oblique direction or from the front, a temperature difference will be generated between the brick and the joint, and the brightness will be different, so that they can be distinguished. In particular, if the joints are cut, the temperature difference will be even greater, making identification easier. In this case, the gas to be blown may be nitrogen or the like in addition to air.
However, air is preferred because it makes identification easier. This is thought to be because carbon often adheres to the cut joints, which burns and raises the temperature in that area. In addition,
In addition to air, oxygen gas or oxygen-containing gases of various concentrations can also be used.

Data processing using a computer can be introduced into the inspection using the above-mentioned apparatus. By determining the values of x and y as described above, the absolute position of the observed portion of the wall surface of the coking chamber can be determined. Therefore, at the same time as recording the observed contents, the x and y values as the observation position may be stored in the computer. In this way, by using the device of this embodiment in combination with a computer and storing observation data at regular intervals together with data on the position, temporal changes in the situation at each position on the wall surface of the coking chamber can be detected. It can be determined based on data stored in a computer.

When the observation data is stored in the computer in this way, the light transmitted by the image guide (image of the wall surface) is input to the computer via a converter that converts it into an electrical signal. When recording on a video, it is connected to the video via a converter that converts it into a magnetic signal. In any case, it is preferable to store it as an image in some form rather than simply storing it as data.

Generally, the height of the lance mounted on the control table is higher than the bottom of the carbonization chamber due to the relationship between the carbonization chamber and the service platform. Therefore, when observing using the apparatus of the above embodiment in the manner described above, it is not possible to observe a small portion further below the point when the lance is lowered the most. However, tilting gear 1
By rotating the lance 1 to tilt the lance 1 from the horizontal position, it is possible to observe a portion lower than the lowest point of the lance. In this case, the absolute value of the observed point on the coking chamber wall surface is determined by the value of y, which depends on the height of the operating table 4, and the value of x, which depends on the amount of movement of the lance 1. It is not possible to determine the location. However, by finding the inclination angle θ of the lance 1 from the horizontal plane and adding this value to the x and y values, it is possible to determine the absolute position of the point being observed.

The lance 1 of the above embodiment is an elongated cylindrical body long enough to be inserted through the kiln opening at one end of the carbonization chamber and reach approximately the center of the furnace length. Therefore, when scanning the wall surface of the coking chamber, this long lance must be moved over the entire length of the lance.

By shortening the length of such a lance, the distance the entire lance must be moved within the carbonization chamber is also reduced.
And in order to simplify movement outside the carbonization room, the seventh
A telescopic lance 1' having a structure as shown in the figure may be used (detailed structure will be described later). In this case, it is not preferable that the air blowing nozzle or the like disposed inside the lance be made of a hard material such as metal. Therefore, heat-resistant flexible tubes are used for the tubes covering the light guide and image guide, the gas supply conduits connected to the air blowing nozzles, etc., and the winding drum 36 shown in FIG. It is necessary to install the flexible tube 35 on top of the flexible tube 35 so that all the flexible tubes 35 described above are wound around it, so that there is no problem at all when the lance is extended or contracted or when the operating table is moved.

In the above explanation, we have described the method of inserting a lance through the kiln opening of the carbonization chamber and observing the wall surface of the carbonization chamber. It may be inserted to observe the wall surface of the carbonization chamber or combustion chamber.

Further, the infrared filter 25 can be installed between the reflecting mirror 34 and the imaging lens 33, or between the image guide 32 and the camera 8, in addition to the above-described installation position.

Further, the condensing section is composed of a reflecting mirror, a prism, a lens, etc. singly or in combination. In addition to what is shown in the figure, this condensing section includes an imaging lens 33 as shown in FIG.
It is also possible to adopt a structure in which the optical fiber 32 is disposed within a protective tube 37 that covers the optical fiber 32, and a window 38 is provided at the tip of the protective tube 37. In this case, the window 38 may be an infrared filter. Furthermore, a total reflection prism can be used instead of the reflecting mirror 34. Note that the light guide 31 is not necessary if observation is possible without illumination.

Although the case where the inspection device is installed in a dedicated traveling vehicle has been described above, the inspection device can also be installed in an extruder, a guide vehicle, or a charging vehicle.

Next, another embodiment will be described with reference to FIGS. 9 to 16. FIG. 9 is a front view of another example of the inspection device used in the present invention, FIG. 10 is a side view of the same, FIG. 11 is an enlarged vertical cross-sectional view of the lance in FIG. 9, and FIG. 12 is the − in FIG. Line sectional view, 13th
The figure is a sectional view taken along the same line, and Figure 14 is a sectional view taken along the same line.
A line sectional view, FIG. 15 is a front view of another example of the lance support device, and FIG. 16 is a side view of the same. 9 and 10 of these figures, 101 and 102 are a first lance and a second lance for holding the optical system, and the first lance 101 is the second lance 102.
It is installed so that it can be slid inside and stored or drawn out. 1
03 is a lance support device for supporting the second lance 102 and moving it horizontally and vertically. The second lance 102 is a lance support device 103
It is supported in the horizontal direction by being held in the upper and lower directions by four rollers 106 provided in the upper and lower sides, and is moved forward or backward in the horizontal direction by rotating the rollers 106 with a drive device (not shown). The lance support device 103 is attached to the mast 107 using a gear 104 and rollers 105 that contact both sides of the mast 107 on a truck 109, and the gear 104 is rotated by a drive device (not shown) or the lance By directly pulling up or pulling down the support device 103, it is moved in the vertical direction. 108
1 is a radiant heat shielding plate, and 110 is a running wheel.

The inside of the first lance 101 and the second lance 102 has a structure as shown in FIGS. 11 to 14,
In these figures, the first lance 101 includes an outer cylinder 128 whose outer surface is covered with a heat insulating material 129, and the outer cylinder 12.
Inner cylinder 127 installed coaxially with a gap in 8
The second lance 102 includes an outer cylinder 118 and an inner cylinder 11 that are coaxially installed with a gap between them.
9 and an inner cylinder 120.

The first lance 101, as shown in FIG.
The three guide shoes 114 provided in the axial direction of the outer surface of the outer cylinder 128 are supported by a ring 116 provided at the tip of the second lance 102 so that they can be moved in and out of the second lance 102 . 1st
The tip of the lance 101 is sealed with a removable cap 112 covered with a heat insulating material 113, and a viewing window 13 is sealed.
0 is set. Note that a reflecting mirror, an image guide, etc. as shown in FIG. 6, for example, are provided inside the lance, but these are not shown. A hose 125 for supplying cooling fluid and a drive chain 121 are attached to the rear end of the first lance 101. chain 12
1 is a second lance 10 by a driving source (not shown).
Chain guide 122 installed in the axial direction within 2
Therefore, when the other end of the chain 121 is pulled by a drive device (not shown), the first lance 101 is drawn into the second lance 102, and the entire lance becomes shorter. Conversely, if the chain 121 is pushed out, it will be pushed out from within the second lance 102, so the entire lance will become longer. If a pulse motor is used as the drive source, it is easy to memorize the position of the lance tip.

The cooling fluid has separate supply paths between the first lance 101 and the second lance 102. 1st lance 10
As shown by the arrow in FIG. 11, the cooling fluid of No. 1 travels through the inner cylinder 127 from the hose 125, returns through the gap between the inner cylinder 127 and the outer cylinder 128 through the hole 115 at the tip, and then returns through the hole 115. 126 into the second lance 102, and is released from the end of the second lance to the outside of the system. The cooling fluid for the second lance 102 is supplied to the conduit 1
24, passes through the gap between the outer cylinder 118 and the middle cylinder 119, and is supplied to the middle cylinder 119 and the inner cylinder 1 through the hole 117.
20 and is discharged from the hole 123 to the outside of the system via the end of the second lance 102.

Next, another example of the lance support device 103 will be described with reference to FIGS. 15 and 16. 2nd lance 10
2 is supported in the horizontal direction by a total of six rollers 106 installed radially by the bearings 132 of the lance support device 103, and is moved horizontally or vertically in the same manner as described above. 131 is an angle adjustment jack for tilting the second lance 102 upward or downward within a range of about 30 degrees from the horizontal direction.

As explained above, the present invention inserts an optical fiber into the carbonization chamber or combustion chamber from outside and observes the image of the wall surface of the carbonization chamber or combustion chamber outside the furnace by transmitting it through the optical fiber. This makes it possible to observe the entire wall surface without lowering the temperature of the coking chamber or combustion chamber. Furthermore, the absolute position of the observation area can be determined based on the height and insertion length of the condensing part, so if there is damage to the wall, the exact position can be known and repair work can be carried out. Very nice. In addition, by using a computer to store the data of each observation position and the corresponding position information, it is possible to know the changes over time at each point on the wall surface, so repairs can be made at the appropriate time. You can go to

[Brief explanation of the drawing]

FIG. 1 is a front view of an example of an inspection device using the method of the present invention, FIG. 2 is a cross-sectional view taken along the line -- in FIG. The figure is a plan view of the lance portion of the inspection device, FIG. 5 is a sectional view taken along the line - in FIG. 4, FIG. 6 is an enlarged longitudinal sectional view of the tip of the lance, and FIG. 8 is a diagram showing the configuration of another example of the condensing section, FIG. 9 is a front view of another example of the inspection device, FIG. 10 is a side view of the same, and FIG.
Fig. 12 is a sectional view taken along the - line in Fig. 11, Fig. 13 is a sectional view taken along the same line, Fig. 14 is a sectional view taken along the - line, and Fig. 15 is a sectional view taken along the - line in Fig. A front view of another example, and FIG. 16 is a side view of the same. 1...Lance for holding optical system, 4...Operation table, 8
...Furnace observation camera, 12...Hydraulic cylinder, 21...Monitor TV, 24...Quartz viewing window, 25...Infrared filter, 31...Light guide, 32...Image guide, 33...
Imaging lens, 34... Reflector, 101... First lance, 102... Second lance, 103... Lance support device, 107... Mast, 114... Guide shoe, 116... Ring, 121... Chain , 122...Chain guide, 131...Angle adjustment jack.

Claims (1)

[Scope of Claims] 1. An optical system including an optical fiber and a condensing section that focuses an image of an object to be observed on the distal end surface of the optical fiber, wherein at least one of the optical fibers is located in a carbonization chamber or a combustion chamber. The part to be inserted into the coke oven is placed in a metal protection tube to allow cooling fluid to flow through the protection tube, and it also has a gas blowing nozzle, which is inserted into the coke oven carbonization chamber or combustion chamber and carbonized from the nozzle. The method is characterized in that while blowing gas onto the wall surface of the chamber or combustion chamber, the wall surface is scanned in relation to the absolute position of the wall surface of the chamber, and each position of the wall surface of the carbonization chamber or combustion chamber is observed to detect damaged parts. How to inspect coke oven walls. 2. The carbonization chamber or combustion chamber based on the relationship between the insertion distance of the light condensing part inserted into the combustion chamber from the kiln opening or insertion port of the carbonization chamber or into the combustion chamber from the peephole of the combustion chamber and the height of the light condensing part. A coke oven wall inspection method according to claim 1, characterized in that the absolute position of the wall surface is determined during observation. 3. Inspection of coke oven oven wall according to claim 1 or 2, characterized in that a lens is used as a condensing part and a device for magnifying observation or imaging is provided near the end face of the optical fiber located outside the oven. Method. 4. Claims characterized in that temporal changes in each position of the wall surface can be detected by storing observation data of the wall surface of the carbonization chamber or combustion chamber and the corresponding absolute position in a computer. Inspection method of coke oven wall according to 1, 2 or 3. 5. The coke according to claim 1, 3 or 4, characterized in that the absolute positions of the joints on the wall surface of the coking chamber are stored in advance in the computer, and the light condensing section is run along the memorized absolute positions of the joints. How to inspect the furnace wall.