JP3981610B2 - Method and apparatus for observing inner wall of coke oven carbonization chamber - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an observation method and an observation apparatus for remotely observing an inner wall of a coke oven.
[0002]
[Prior art]
The coke oven is constructed by alternately connecting a large number of carbonization chambers and combustion chambers, charging coal into the carbonization chamber, and applying high heat of 900 ° C. to 1100 ° C. from the combustion chamber to the carbonization chamber through the furnace wall. Coke is produced by adding coal continuously over time and drying coal. When this dry distillation is complete, the coke is discharged and the coal is charged and heating is started again.
[0003]
Each carbonization chamber has a height of about 6.5 m, a width of about 0.4 m, and a length of about 16 m, and forms a furnace space that is very narrow and deep (long). The inner wall of the carbonization chamber is covered with refractory bricks, and each refractory brick is roughly 120 mm high, 260 mm wide, and 110 mm thick. The coke oven heats the combustion chamber adjacent to each carbonization chamber to a high temperature, and supplies the heat to the carbonization chamber by heating the refractory bricks on the walls of the carbonization chamber to a high temperature. Therefore, the refractory brick used for the carbonization chamber wall (partition wall with the combustion chamber) is exposed to high temperature for a long time, and every time coking of coal is completed, the coke is extruded and carried out by a coke extruder. Refractories are subject to coke pressure and are easily damaged by thermal, chemical or mechanical stress. That is, it tends to cause wall surface joint breaks, brick cracks, peeling, carbon adhesion, wall surface unevenness, curvature, kiln width fluctuation, and the like. In the damaged portion, excessive force is locally applied during coke extrusion, and the damage is likely to further expand, and the damaged portion has a heat propagation characteristic different from that of the normal portion, which is not preferable for producing homogeneous coke. Relatively small damaged parts are sprayed and filled with refractory, and bricks lacking are fitted with refractory bricks and sprayed with refractory to repair them, but it is difficult to find and locate the damage. For this reason, in a situation where the inside of the carbonization chamber is red-hot, it is important to observe the surface with the necessary resolution for the necessary part of the inner wall, usually the entire surface of the inner wall, to detect the damage and to grasp the position. is there.
[0004]
In the method of observing the inner wall of the coke oven from the coke oven kiln using a short time between operations, the inside of the kiln must be observed from outside the kiln because it is hot, and the carbonization chamber is as described above. However, since the depth of the furnace is narrow, the width is narrow, so the inner wall refractory at the back of the furnace is observed at a shallow angle from a distance, and the surface observation is very difficult.
[0005]
In Patent Document 1, a camera transport boom equipped with a camera (ordinary two-dimensional ITV camera) is inserted into the furnace from the furnace port of the coke oven carbonization chamber, and the inner wall surface of the furnace is photographed while moving in the furnace length direction. Is disclosed. However, since the width of the carbonization chamber is very narrow, if the camera is directly opposed to the wall of the carbonization chamber, the distance between the camera and the inner wall cannot be obtained, and the shooting range becomes narrow and images in the required range cannot be obtained. The camera is mounted obliquely with respect to the wall surface, and the wall surface is viewed at a shallow angle. As shown in FIG. 7, the image of the inner wall photographed in this way has a narrow photographing range for the image on the side close to the camera (22a), and conversely the image on the side far from the camera has a wide photographing range but a small target. However, the necessary resolution cannot be obtained (22b). Also, with such a photographing method, it is difficult to focus on the entire field of view. In the above publication, an invention is disclosed in which the obtained perspective image is image-processed and converted into a front image as if it was taken facing the furnace wall, but even if such image processing is performed, it is disclosed. The point that the resolution of the portion where the far field is photographed cannot be obtained sufficiently, and the point that it is difficult to focus over the entire field of view remains unchanged.
[0006]
Patent Document 2 describes an inner wall observation method and apparatus capable of obtaining an observation image from an optimum angle with a good resolution over the entire inner wall in a state where the carbonization chamber is red hot. However, since the height of the carbonization chamber exceeds 6 m, if it is attempted to image the entire height direction at the same time, it becomes a large-scale facility, which increases the difficulty of installation and operation of the apparatus and increases the capital investment.
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 3-105195
[Patent Document 2]
JP-A-11-106755
[0008]
[Problems to be solved by the invention]
The present invention is capable of observing the surface with a necessary resolution for a necessary portion of the inner wall, that is, the entire surface of the inner wall, in a situation where the carbonization chamber is red hot, and discovering the damage and grasping the position and state of the damage. It is an observation method and apparatus, and an object is to provide an observation method and an observation apparatus capable of downsizing an imaging portion of the observation apparatus.
[0009]
[Means for Solving the Problems]
The present invention has been made to solve the above problems, and the gist thereof is as follows.
(1) In the method of inserting the imaging device 1 into the inside of the carbonization chamber from the coke oven carbonization chamber and observing the inside of the carbonization chamber based on the imaging of the inner wall, the field of view of the imaging device 1 is linear or slit The mirror surface 7 is disposed in front of the imaging device, and the image of the carbonization chamber wall reflected by the mirror surface 7 is captured in the field of view of the imaging device, and the carbonization chamber wall is captured. The mirror surface 7 can move up and down in the carbonization chamber as a unit, The imaging device 1 and the mirror surface 7 are moved in the vertical direction by turning the turning arm 10, and the imaging direction of the imaging device and the installation direction of the mirror surface are kept constant regardless of the turning position of the turning arm 10. The imaging device 1 and the mirror surface 7 are moved in the furnace length direction with the vertical position determined, and the imaging data is collected every time the imaging device moves a short distance, and the imaging data corresponds to the movement distance in the furnace length direction. The coke oven carbonization chamber is characterized in that the coke oven is sequentially connected, and the position of the carbonization chamber in the vertical direction is changed and the same imaging is repeated to create a large area image of the carbonization chamber wall as a single image. Observation method.
( 2 ) The mirror surface 7 Is more than one It consists of a mirror surface, For each mirror surface, the optical axis from the imaging device reflects and the angle of the optical axis from the mirror surface to the side wall is different, The above (1) is characterized in that the inner wall of the carbonization chamber is observed from a plurality of angles by selecting an image obtained from which mirror surface. In The inner wall observation method of the coke oven carbonization chamber of description.
( 3 ) An imaging device 1 having a linear or slit-like visual field for imaging the inner wall of the carbonization chamber and disposed in the furnace height direction, one or a plurality of the imaging devices 1, and disposed in front of the visual field of the imaging device, One or more mirror surfaces 7 that supply a reflected image to the field of view of the imaging device, a vertical movement device that supports the imaging device 1 and the mirror surface 7 and moves in the vertical direction of the carbonization chamber, and supports the vertical movement device. In the process of reciprocating in the furnace length direction of the imaging apparatus 1 by the furnace length direction moving means, a moving unit that reciprocates in the furnace length direction and a line obtained each time the imaging apparatus 1 moves a short distance Image combining means for sequentially joining image data of a rectangular or slit-like field of view according to the moving distance in the furnace length direction, and compositing a wide area image of the carbonization chamber wall as a single image The vertical movement device moves up and down by turning the turning arm 10 and swings so as to keep the imaging direction of the imaging device and the installation direction of the mirror surface constant regardless of the turning position of the turning arm 10. Have 12 An apparatus for observing the inner wall of a coke oven carbonization chamber.
( 4 The imaging device 1 and the mirror surface 7 arranged at the tip of the swing arm 10 can be attached to and detached from the tip of the swing arm 10 together with the swing device 12 or separately from the swing device 12. A repair device can also be arranged, and the furnace wall repair can be performed by installing the furnace wall repair device at the tip of the swivel arm after the observation of the inner wall of the carbonization chamber ( 3 Coke oven carbonization chamber inner wall observation device.
( 5 ) The mirror surface 7 is characterized in that the surface of the tube having a water cooling structure inside is directly formed as one or more mirror surfaces. (3) or (4) The apparatus for observing the inner wall of the coke oven carbonization chamber described in 1.
( 6 The imaging device 1 is housed in a water-cooled housing (above) 3 ) ~ ( 5 ) Is a coke oven carbonization chamber inner wall observation device.
[0010]
As shown in FIG. 2, the imaging device 1 has a one-dimensional or substantially one-dimensional field of view 8, and a plane including the field of view 8 is substantially parallel to the inner wall of the carbonization chamber. The mirror surface 7 is disposed in front of the imaging device 1, and the carbonization chamber wall portion 9 can be imaged through an image obtained by reflection on the mirror surface 7. The range in which the imaging device 1 can capture an image at a certain time is a linear portion in the vertical direction. By performing imaging while moving the imaging device 1 and the mirror surface 7 in the coking chamber furnace length direction, the horizontal direction of the carbonizing chamber With respect to the entire length of the furnace length, an image of the inner wall of the imaging range 9 portion of the imaging device can be obtained in the vertical direction.
[0011]
It is possible to simultaneously cover the entire height range of the carbonization chamber by arranging a plurality of imaging devices 1 in the vertical direction, but in the present invention, as shown in FIG. Reference numeral 7 denotes only a part of the height in the coking chamber height direction as an imaging range. In order to cover the entire height range, it is necessary to use an imaging device and a mirror surface whose height is comparable to the height of the carbonization chamber, but by making only a part of the height as the imaging range as in the present invention. The housing 4 and the mirror surface 7 that house the imaging device 1 can be made compact.
[0012]
After the imaging of the entire length of the furnace is completed for the height range that can be covered by the imaging device 1 and the mirror surface 7, the height direction position of the imaging device 1 and the mirror surface 7 in the furnace is changed, for example, from the position (a) in FIG. The height is changed to the position (b), and imaging is performed for the height range (b). By repeating the imaging in this way, it is possible to obtain imaging data for the entire length and height of the carbonization chamber wall.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The imaging device 1 used in the present invention is characterized in that the field of view is linear or slit-shaped and is arranged so as to image the carbonization chamber wall. An imaging device having a linear or slit field of view uses an imaging device in which light receiving elements are arranged one-dimensionally as the imaging device. A CCD imaging device or the like in which CCD (charge coupled device) units are arranged in series, and the number of units is selected as 2048 units × 1 row, 4096 units × 1 row or 5150 units × 1 row. Can do. In order for the field of view to be slit-shaped, the light receiving elements need not be arranged in a single row, and there may be two or several rows. Alternatively, a normal two-dimensional image sensor may be used, and a slit-like image of a specific field of the entire field of view may be used. However, it is possible to obtain an element with a higher resolution in the length direction of the slit-like field by using a one-dimensional image sensor than using a two-dimensional image sensor.
[0014]
In the case of the carbonization chamber side wall observation imaging apparatus, the optical axis of the imaging apparatus is arranged substantially parallel to the furnace length direction, and the slit-shaped field of view is arranged parallel to the furnace height direction. As shown in FIG. 4A, a long thin mirror surface 7 that covers the slit-shaped field of view is arranged in front of the imaging device, and an angle between the mirror surface and the optical axis 6 of the imaging device is approximately 45 ° to obtain a reflected image. The observation part of the inner wall is observed from a substantially vertical direction through a mirror surface. As shown in FIG. 4B, the angle between the mirror surface and the optical axis of the imaging device may be changed, and the observation location may be observed from an oblique direction through the mirror surface. In any of the embodiments, the extension distance of the optical axis between the imaging device and the observation point is determined so as to cover the imaging range where the visual field is necessary. As a result of adopting the configuration of the present invention, since the distance between the shooting location and the imaging device is substantially the same in the entire field of view in one imaging, it is possible to focus in the entire field of view.
[0015]
As the vertical movement means for moving the imaging device 1 and the mirror surface 7 of the present invention in the height direction, a method using a turning arm 10 turning in the vertical direction as shown in FIG. 1 or a method using a moving means sliding up and down, etc. Can be used. In the case of using the swing arm 10, the imaging device 1 and the mirror surface 7 are disposed at the tip of the swing arm 10. Here, it is preferable that the imaging direction of the imaging device 1 and the orientation of the mirror surface 7 always face the same direction regardless of the height direction position of the swivel arm 10. Specifically, the imaging direction of the imaging device 1 is preferably a horizontal direction parallel to the side wall, and the direction of the mirror surface 7 is preferably a vertical direction. Therefore, a swing device 12 is disposed at the tip of the swivel arm 10, and the imaging device 1 and the mirror surface 7 are installed on the swing device 12. By adjusting the rotation angle of the swing device 12 in accordance with the turning of the turning arm 10, the orientation of the imaging device 1 and the mirror surface can always be maintained in a constant direction.
[0016]
Unlike the observation of the side wall 17, the imaging device (1b, 1c) for observing the furnace top refractory 18 or the furnace bottom refractory 19 can take a longer distance from the refractory to the imaging device viewed vertically. An angle between the axis and the observation surface can be arbitrarily determined. Therefore, it is not necessary to use a mirror surface as in the side wall observation, and it is possible to observe at an arbitrary angle including 90 ° with respect to the observation surface. The linear or slit imaging device field of view is arranged parallel to the furnace width direction.
[0017]
The imaging device moves in the furnace length direction together with the mirror surface. At this time, the heights of the imaging device 1 and the mirror surface 7 are kept constant. During this movement, the direction of the optical axis of the image pickup device is always maintained in a constant direction. Therefore, the observation spot 9 on the inner wall that the image pickup device sees as a field of view moves with the same distance as the image pickup device. When moving, every time the imaging device moves a short distance, imaging data captured by the imaging device in a linear or slit-like field of view is collected. Usually, image data is collected every time a short fixed distance is moved. The imaging data is aggregated, and, for example, one slit-shaped imaging data is displayed in the vertical direction on the two-dimensional screen, and the imaging data is displayed in the horizontal direction so that the imaging data is arranged for each moving distance of the imaging interval. Since the moving distance of the imaging interval is set to be short, for example, 1 mm, a two-dimensional image can be created by arranging the imaging data in this way. If it is an image of the side wall of the furnace, in the created image, the vertical direction is the furnace height direction, the horizontal direction is the furnace length direction, and an image is obtained as if the inner wall of the furnace was viewed at a distance from the front. be able to. The focus is in every place, the required resolution is satisfied in any place, and image processing for enlarging or reducing the image depending on the place is not required. As a method of creating a two-dimensional image by arranging the one-dimensional image data as described above, a general image scanner scans a one-dimensional reading device to create a two-dimensional image as image data. It is possible to use a general-purpose method used.
[0018]
In FIG. 6, the imaging device 1 has moved from the position 1r to the position 1s and is still moving. During this time, the observation site of the side wall 17 by the imaging device moved from 9r to 9s. Images based on the imaging data obtained so far are synthesized by the image synthesizing unit 23, and an image 25 is obtained on the image display unit 24.
[0019]
The number of imaging devices can be one or a plurality of side wall observation imaging devices. In the present invention, since the imaging device can be moved up and down, a single imaging device covers a certain range in the height direction, and sequentially captures the entire height range of the sidewall by moving the height of the imaging device. Can do. Although the side wall 17 has two left and right surfaces, the left and right side walls are observed with the same image pickup device by adopting a method in which one side wall 17a is observed on the outward path of the image pickup apparatus movement and the remaining side wall 17b is observed on the return path. It is possible. Observation of the refractory at the furnace bottom and the furnace top can be observed with one imaging device each because the furnace width is narrow.
[0020]
When the image pickup apparatus moves, it is difficult to completely prevent the image pickup apparatus from shaking. In the horizontal movement mechanism 13 as a moving means for moving the imaging device in the furnace length direction, the imaging device is guided by a wheel 14 that contacts the furnace bottom, or at the tip of a beam having a length equal to the furnace length of about 16 m. Installed and supported without ground guide. When using a wheel that touches the bottom of the furnace, the bottom of the furnace is not a smooth flat surface. It is difficult to avoid shaking. As shown in FIG. 5, in the conventional method in which the side wall is imaged obliquely by the camera, the image shake has occurred by the magnitude of Δy due to the presence of the lateral blur Δx. In the embodiment in which the optical axis to be directed is oriented vertically, even if the imaging device and the mirror surface fluctuate sideways, there is little variation in the observation position due to it. Therefore, there is an advantage in that an image with a good resolution can be obtained with less image distortion due to the lateral blur accompanying the movement of the imaging device.
[0021]
In the embodiment in which the optical axis directed from the mirror surface toward the side wall is inclined, the fluctuation in the observation position caused by the lateral blurring of the imaging device and the mirror surface and the disturbance of the image based thereon are compared with the embodiment in which the optical axis is vertical. Some image distortion occurs. On the other hand, since the observation is performed at an angle with respect to the observation surface, it has a feature that the unevenness of the observation surface can be grasped more clearly than in the embodiment in which observation is performed from the vertical direction. It is important to check the depth of cracks in order to grasp the damage status of the inner wall of the carbonization chamber, but it is possible to recognize a certain depth of unevenness based on the shadow of the obtained image, so whether repair is necessary or not. It is useful for grasping the degree of repair.
[0022]
As described above, since each has a unique advantage depending on the angle of the optical axis from the mirror surface toward the side wall, it is preferable that an arbitrary form can be selected according to the observation purpose. In the present invention, as shown in FIG. 2, the imaging device turning device 2 that supports the imaging device 1 and enables the optical axis of the imaging device to be directed to each mirror surface of a plurality of sets of mirror surfaces (7b to 7e). By determining the orientation of the imaging device by the action of the turning device, the angle of the optical axis toward the side wall can be selected.
[0023]
Although the side walls of the carbonization chamber have both left and right sides, the direction of the imaging device is controlled by the action of the imaging device turning device 2, and the left side wall is observed as the forward path of movement in the furnace length direction by the same imaging device, and the return path is the right side surface. It is also possible to control the observation.
[0024]
Usually, observation is performed between coke oven operations, so the observed oven wall is red hot. Therefore, when observing with the image pickup apparatus, the self-luminous light is observed, and no separate illumination is required. In general, the refractory is thin, the distance between the adjacent combustion chambers is shortened, and the damaged part is heated to a higher temperature than the surrounding healthy part. Can be recognized. Moreover, since the carbon adhesion part burns itself, the brightness is high. The damaged portion to be repaired and the repair method are determined from the image obtained based on the luminance information and the unevenness information in the embodiment in which the optical axis from the mirror surface toward the side wall is inclined, and repair is performed.
[0025]
Since the mirror surface 7 disposed in front of the imaging device is exposed to a high temperature environment, it is necessary to take measures to protect the mirror surface from thermal deformation and thermal damage. In a method in which a planar mirror surface is provided independently and supported by a support mechanism, a complicated cooling mechanism is required to effectively and uniformly cool the mirror surface. On the other hand, as in the present invention shown in FIG. 2, the above problem can be solved by making the surface of the tube having a water cooling structure directly a mirror surface. Since it is a circular tube, it is easy to form a plurality of mirror surfaces on the surface. Stainless steel pipe is the most suitable material for the pipe. A necessary portion of the surface of the tube is polished into a flat surface to obtain a mirror surface, but if it is a stainless steel tube, the occurrence of cloudiness on the mirror surface is not a problem even if it is used in a red-heated coke oven. In addition, since the overall shape is tubular, the heat effect received from the periphery is uniform in the circumferential direction of the tube, and because it is tubular, it is highly rigid and can be manufactured at low cost. Generation of mirror distortion during insertion in the furnace is at a level that does not cause a problem. The internal water cooling structure is a method of flowing cooling water through the entire inside of the pipe, or a jacket type in which cooling water is flowed between the inner pipe 3b and the outer pipe 3a as a double pipe structure as shown in FIG. 2 (a). Either can be adopted. The mirror surface 7 is an elongated flat mirror parallel to the tube axis having a length that covers the field of view of each imaging device, and is provided at a plurality of locations (7b to 7e) on the outer periphery of the tube according to the angle with the optical axis of the imaging device. .
[0026]
The imaging device 1 and the imaging device turning mechanism 2 need to be housed in a casing whose outer periphery is cooled in order to protect from the high temperature atmosphere in the carbonization chamber. Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 7-126636, a method of storing each imaging device and a turning mechanism in a water-cooled casing is known, but this makes it very difficult to manufacture and maintain. . On the other hand, as in the present invention shown in FIG. 2 and FIG. 3, a cylindrical housing 4 whose outer periphery is water-cooled with a water-cooling jacket is prepared, and an imaging device 1a and an imaging device turning device 2 for side wall observation are prepared. Further, if necessary, the imaging devices 1b and 1c for observing the top and bottom of the furnace can be accommodated in the single cylindrical casing 4. As a result, the swivel sliding part of the image pickup apparatus is not exposed to heat, so there is no need for a special water cooling mechanism, and there is no fear of cooling water leakage. Moreover, the cooling structure of the housing is simple and the flow of cooling water can be made smooth. Furthermore, since the structure is simple, the weight can be reduced. The observation window is usually fitted with quartz glass or the like with a coating for reflecting heat rays to prevent intrusion of heat and outside air.
[0027]
In the present invention, as shown in FIG. 3, a pair of distance meters (26a, 26b) are housed in the imaging device housing 4, and the distance to the left and right side walls (17a, 17b) by the distance meters. Can be measured. As the distance meter 26, a laser distance meter can be used. Based on the sum of the measurement results of the pair of distance meters (26a, 26b), the furnace width between both side walls at the distance measurement point can be measured. When the side wall 17 of the carbonization chamber is damaged, the furnace width increases at the damaged portion. In addition, if there is carbon adhesion, the furnace width of the part is narrowed. Therefore, by observing the inner wall of the carbonization chamber and simultaneously measuring the furnace width with the imaging device of the present invention, it is possible to obtain more detailed information on the damage status of the inner wall of the carbonization chamber, and repairing refractories or removing carbon. It becomes possible to carry out more appropriately. If the method of measuring the furnace width is adopted, even if the casing in which the distance meter is stored rolls in the carbonization chamber, it is possible to perform measurement without being affected by the roll.
[0028]
After the damaged part of the inner wall refractory is specified by the inner wall observation apparatus of the present invention, the damaged part is repaired. For repair, remove the carbon at places where the carbon adheres heavily, and repair the damaged parts of the refractory brick by spraying the refractory. A device for inserting a carbon removal jig or a refractory spray nozzle into the furnace and arranging it corresponding to the damaged part is required. Although it is possible to separately provide a moving device for inserting and arranging the repair device in the furnace, if the moving device of the inner wall observation device of the present invention can also serve as the moving device of the repair device, the equipment cost can be reduced. This eliminates the need to secure a wide facility installation location.
[0029]
In the present invention, the imaging device and the mirror surface at the tip of the vertical movement device such as the swivel arm 10 can be attached and detached, and after the observation in the furnace is completed, the imaging device and the mirror surface are removed from the tip of the vertical movement device, instead of a spray nozzle or the like. By attaching this repair jig to the tip of the up-and-down moving device, it becomes possible to perform both in-furnace observation and in-furnace repair operations with one set of moving device. When the swing arm 10 is used as the vertical movement device, the swinging device 12 at the tip of the swing arm 12, the imaging device 1, and the mirror surface 7 can be integrally removed from the swing arm 10.
[0030]
【Example】
An embodiment of the present invention will be described with reference to FIGS. The inner wall of the coke oven carbonization chamber having a height of 6.5 m, a width of 0.4 m, and a length of 16 m was observed using the inner wall observation device of the carbonization chamber shown in FIGS. The imaging device 1 for observation has one unit (1a) for side wall observation and one unit (1b, 1c) for furnace top / bottom bottom observation, each of which is a one-dimensional unit having 2048 units × 1 row of light receiving elements. It is a CCD camera. The imaging apparatus can observe a linear range with a viewing angle of 60 °. The side wall observation imaging device 1a, the furnace top observation imaging device 1b, and the furnace bottom observation imaging device 1c are all housed in one vertical water-cooled cylinder 4.
[0031]
As shown in FIG. 2, a cylinder (hereinafter referred to as “mirror tube 3”) having two sets of mirror surfaces (7b to 7e) symmetrical on the outer periphery is vertically arranged at a position 900 mm ahead of the side wall imaging device 1a. . The mirror tube 3 is a jacket water cooling system in which the inside is a double tube and cooling water passes between the outer tube 3a and the inner tube 3b, and the outer tube is a stainless steel tube. On the outer periphery of the mirror tube, there are plane parts symmetrically left and right at positions of 45 ° and 22.5 ° with respect to the furnace length direction (7b to 7e), and are mirror-polished to constitute a plane mirror (FIG. 2). (C)). The width of the plane mirror is 20 mm, and an imaging device for observing the side walls can observe the side walls at an angle of 90 ° or 45 ° with respect to the side walls for each plane mirror by observing the reflected light with these plane mirrors in the field of view. it can. As shown in FIG. 2A, the side wall imaging device 1a can be swung left and right within a range of 15 ° around the furnace length direction by the swivel device 2, and by selecting the angle, A method of observing the side wall from the direction of the side wall 90 ° (6b, 6e) to the direction of 45 ° (6c, 6d) by specular reflection can be selected. 2 (a) and 2 (b), the orientation of the imaging device 1 is 6d, and the angle at which the side wall 17b is observed at a 45 ° angle through the mirror surface 7d is selected.
[0032]
In each of the furnace length observation imaging apparatus 1b and the furnace bottom observation imaging apparatus 1c, the optical axis 6 is set in the vertical direction, and the distance from the observation target is set to 400 mm.
[0033]
The imaging device and the mirror surface are moved up and down by the turning arm 10. A swing drive unit 11 is provided at the base of the swing arm 10, and an imaging device and a mirror surface are disposed via a swing device 12 at the tip of the swing arm. The head swing device 12 can always keep the orientation of the imaging device and the mirror surface constant by swinging the head up and down as the swing arm 10 swings. The connecting portion between the swing device 12 and the turning arm 10 of the present embodiment also has a left and right turning mechanism 15. The swinging device 12 and the left and right turning mechanisms 15 can be separated, and after the observation in the furnace is finished, the in-furnace repair device is attached instead of separating the swinging device 12. The left / right turning mechanism 15 is a function necessary for in-furnace repair, and the left / right turning mechanism 15 is used with the turning position fixed in observation in the furnace.
[0034]
The horizontal movement mechanism 13 for horizontally moving the observation apparatus in the furnace has a necessary length for moving the entire length of the furnace. A wheel 14 that contacts the bottom of the furnace is provided at the bottom of the horizontal movement mechanism, and supports the horizontal movement mechanism. A turning drive unit 11 of the turning arm 10 is installed at the tip of the horizontal moving mechanism, and the horizontal moving mechanism 13 is driven by an electric motor and can move in the furnace.
[0035]
The horizontal movement mechanism 13 moves in the furnace at a speed of 12.5 m / min, and collects imaging data of each imaging device every time it moves 1 mm. The images are created as an on-display image and a printed image. As for the side wall image, 2048-bit one-dimensional information can be obtained in the height direction with one imaging device. This information is sequentially connected by the image composition means corresponding to the moving distance in the furnace length direction. Then, by moving 16 m in the furnace length direction, 16000 pieces of image information are connected in the furnace length direction, and as a result, a two-dimensional image displaying the length of the side wall 17 in the furnace length direction is obtained. The entire range of the sidewall can be imaged by changing the height of the imaging device by turning the revolving arm 10 and performing imaging four times. A two-dimensional image is obtained by imaging the top 18 of the furnace at the time of imaging the uppermost side wall and simultaneously imaging the bottom of the furnace 19 at the time of imaging the lowermost side wall.
[0036]
Thus, images were created for the left and right side walls and the top and bottom of the furnace. From the images, we were able to clearly read the conditions of wall joints, brick cracks, peeling, carbon adhesion, wall surface irregularities, and curvature, and we were able to accurately grasp the damaged parts.
[0037]
Next, the swinging device 12, the image pickup device, and the mirror surface were removed from the turning arm 10, and a repairing device such as a refractory spray nozzle was attached to the tip of the turning arm. By repairing the refractory with this repair device based on the information on the damage status / damaged part, the refractory can be repaired in a timely manner, extending the life of the coking chamber refractory and shortening the repair time. Was able to be realized.
[0038]
【The invention's effect】
In the state where the carbonization chamber of the coke oven is red hot, it is possible to obtain an observation image from the optimum angle with a good resolution over the entire inner wall, and as a result, the damage status and damage location of the refractory obtained Based on accurate information, appropriate refractory repair can be performed in a timely manner, and the lifetime of the coking chamber refractory can be extended and the repair time can be shortened.
[0039]
The side wall observation device can be made compact and easy to handle during observation in the furnace. In addition, by using the up-and-down moving device also as the refractory repairing device, the observation in the furnace and the repairing work in the furnace can be easily performed.
[Brief description of the drawings]
FIGS. 1A and 1B are side views of the present invention, and FIGS. 1A, 1B, and 1C show situations in which imaging devices and the like are arranged at different positions in the vertical direction.
FIG. 2 is an enlarged view showing the relationship between the imaging device, mirror surface, and inner wall of the present invention, (a) is a cross-sectional view seen from above, (b) is an AA plane arrow diagram of (a), (C) is the enlarged view which looked at the mirror tube from the imaging device direction.
FIG. 3 is a cross-sectional view of the present invention as seen from the front.
FIG. 4 is a plan view showing the relationship between the imaging device, mirror surface, and inner wall of the present invention.
FIG. 5 is a diagram illustrating a relationship of influences caused by a lateral shake of the imaging apparatus according to each embodiment of the present invention.
FIG. 6 is a diagram showing how the inner wall observation image is synthesized by the image synthesizing means while moving the imaging apparatus in the present invention.
7A and 7B are diagrams illustrating a situation of imaging of an inner wall in a conventional technique using a two-dimensional imaging device, in which FIG. 7A shows a range that can be covered with one piece of imaging data on a side wall, and FIG. The image imaged by is shown.
[Explanation of symbols]
1 Imaging device
1a Side wall observation imaging device
1b Furnace top refractory observation imaging device
1c Furnace bottom refractory observation imaging device
2 Imaging device turning device
3 Mirror tube
3a Mirror tube outer cylinder
3b Mirror tube inner cylinder
3c Mirror tube cooling water passage
4 Imaging device housing
4a Imaging device housing outer cylinder
4b Imaging device housing inner cylinder
4c Imaging device housing housing cooling water passage
5 Imaging device window
6 Optical axis of imaging device
7 mirror surface
8 Field of view of the imaging device
9 Inner wall imaged by the imaging device
10 Swivel arm
11 Swiveling drive
12 Swing device
13 Horizontal movement mechanism
14 wheels
15 Left and right turning mechanism
16 side walls
17a Left side wall
17b Right side wall
18 Furnace top refractories
19 Furnace bottom refractories
20 Two-dimensional imaging device in the prior art
21 Inner wall imaging range by two-dimensional imaging device
22 Images captured by a two-dimensional imaging device
23 Image composition means
24 Image display means
25 Composite image
26 Distance meter

Claims (6)

In the method of observing the state of the carbonization chamber wall based on the imaging of the inner wall by inserting an imaging device into the chamber of the coke oven carbonization chamber,
The field of view of the imaging device is linear or slit-like, a mirror surface is disposed in front of the imaging device, and the image of the inner wall of the carbonization chamber reflected by the mirror surface is captured from the field of view of the imaging device so as to capture the wall of the carbonization chamber. Arranged, the imaging device and the mirror surface can be moved up and down in the carbonization chamber as a unit,
The vertical movement of the imaging device and the mirror surface is performed by turning a turning arm, and the imaging direction of the imaging device and the installation direction of the mirror surface are kept constant regardless of the turning position of the turning arm,
Move the imaging device and the mirror surface in the furnace length direction by setting the vertical position, and collect imaging data every time the imaging device moves a short distance,
The image data is sequentially connected in accordance with the moving distance in the furnace length direction, and the same position is repeated by changing the vertical position of the coking chamber to create a large area image of the coking chamber wall as a single image. A method for observing the inner wall of a coke oven carbonization chamber. The mirror surface is composed of a plurality of mirror surfaces, and for each mirror surface, the optical axis from the imaging device reflects and the angle of the optical axis from the mirror surface toward the side wall is different, and the mirror surface is selected from which the image obtained is captured. The method of observing the inner wall of a coke oven chamber according to claim 1 , wherein the inner wall of the coking oven is observed from a plurality of angles. An imaging device having a linear or slit-like field for imaging the wall of the carbonization chamber, and one or more arranged in the furnace height direction;
One or more mirror surfaces that are disposed in front of the field of view of the imaging device and supply a reflected image of the inner wall of the carbonization chamber to the field of view of the imaging device;
A vertical movement device that supports the imaging device and the mirror surface and moves in the vertical direction of the carbonization chamber;
A moving means for supporting the vertical movement device and reciprocating in the furnace length direction;
In the process of reciprocating the imaging device in the furnace length direction by the furnace length direction moving means, the imaging data of the linear or slit-like field obtained each time the imaging device moves a short distance is obtained in the furnace length direction. Image combining means for sequentially connecting in accordance with the moving distance, and combining an image of a large area of the carbonization chamber wall as a single image ;
The up-and-down moving device has a swinging device that moves up and down by turning a turning arm and rotates so as to keep the imaging direction of the imaging device and the installation direction of the mirror surface constant regardless of the turning position of the turning arm. An apparatus for observing the inner wall of a coke oven carbonization chamber. The imaging device and the mirror surface arranged at the tip of the swing arm can be attached to and detached from the tip of the swing arm together with the swing device or separately from the swing device, and a furnace wall repair device can also be placed at the tip of the swing arm, The apparatus for observing an inner wall of a coke oven carbonization chamber according to claim 3 , wherein after the observation of the inner wall of the carbonization chamber, the furnace wall repair device can be installed at the tip of the swivel arm to repair the furnace wall. 5. The apparatus for observing the inner wall of a coke oven carbonization chamber according to claim 3 or 4 , wherein the mirror surface has one or more mirror surfaces directly on the surface of a tube having a water cooling structure inside. 6. The apparatus for observing an inner wall of a coke oven carbonization chamber according to any one of claims 3 to 5 , wherein the imaging device is housed in a casing having a water cooling structure.

Images