KR102235850B1 - Image based radiation inspection apparatus - Google Patents

Abstract

The present invention relates to an image-based radiation inspection apparatus, for performing a non-destructive inspection of a welding portion of a water-cooled wall boiler pipe of a thermal power plant based on an image, and includes a radiating unit, a detection unit, a photographing unit, and a control unit. The radiating part is detachable from one side of the water-cooled wall boiler pipe of a thermal power plant that requires non-destructive testing and is installed to be movable up and down, and radiates radiation to the welded part of the water-cooled wall boiler pipe. The detection unit is detachably installed on the other surface of the water cooling wall boiler pipe opposite the radiation unit with the center of the water cooling wall boiler pipe and is installed so as to be movable up and down, and detects radiation emitted from the radiation radiation unit. The photographing unit is installed in the radiating unit facing the water-cooled wall boiler pipe, and photographs and outputs image information of the water-cooled wall boiler pipe. The control unit recognizes the unit pipe of the water cooling wall boiler pipe based on the image information received from the photographing unit while the radiation unit and the detection unit move together, and performs a non-destructive inspection by radiating radiation to the recognized unit pipe.

Description

Image based radiation inspection apparatus

The present invention relates to a non-destructive inspection apparatus, and more particularly, to an image-based radiographic inspection apparatus for performing a non-destructive inspection of a welding portion of a water-cooled wall boiler pipe of a thermal power plant based on an image.

In order to inspect the welds of the water-cooled wall boiler piping of a thermal power plant, the operator was directly input and most of the inspections were performed through a method such as a visual inspection and ultrasonic testing (UT).

However, there are some couplings that are not detected through the UT test, and there is a problem that the test work takes a long time, so research is being conducted to try radiographic testing (RT).

However, in the case of most radiographic inspections, since inspection equipment is fixed and the inspection object is moved to perform inspection, there is a problem that is not appropriate for inspection of water-cooled wall boiler piping with a height of 40m or more installed in a thermal power plant.

In addition, in order to automate non-destructive inspection, accurate information on design parameters and water cooling wall boiler piping is required. In order to obtain accurate parameters for the water-cooled wall boiler piping, there is a method of measuring the water-cooled wall boiler piping to be inspected in advance, but there is a problem that a lot of time is required for the measurement.

Registration Utility Model No. 20-0472414 (2014.04.21.)

Accordingly, an object of the present invention is to provide an image-based radiation inspection apparatus for performing non-destructive inspection of a welded portion of a water-cooled wall boiler pipe of a thermal power plant based on an image.

Another object of the present invention is to provide an image-based radiographic inspection apparatus that performs a non-destructive inspection based on an image without design parameters of a water-cooled wall boiler piping of a thermal power plant.

Another object of the present invention is to provide an image-based radiographic inspection apparatus that is performed based on an image that is easy to attach and detach to a water-cooled wall boiler pipe in order to smoothly inspect a welded part of a water-cooled wall boiler pipe of a thermal power plant.

Another object of the present invention is to provide an image-based radiographic inspection apparatus that performs an image-based inspection of a welded portion of a water-cooled wall boiler pipe while moving while attached to a water-cooled wall boiler pipe of a thermal power plant.

Another object of the present invention is to provide an image-based radiographic inspection apparatus that is performed based on a lightweight image.

In order to achieve the above object, an image-based radiation inspection apparatus according to the present invention includes a radiating unit, a detection unit, a photographing unit, and a control unit. The radiating unit is installed to be detachably installed on one surface of the water cooling wall boiler pipe of the thermal power plant requiring non-destructive inspection, and the first moving platform is installed to be semi-automatically movable up and down by the first moving platform, and the water cooling wall boiler pipe And a radiation radiation unit that emits radiation to the weld. The detection unit has a second moving platform detachably installed on the other surface of the water cooling wall boiler pipe opposite the radiating unit with the water cooling wall boiler pipe as the center, and semi-automatically movable up and down by the second moving platform. And a radiation detection unit for detecting radiation emitted from the radiation radiation unit. The photographing unit is installed on the radiating unit facing the water cooling wall boiler pipe to photograph and output image information of the water cooling wall boiler pipe. And the control unit controls the vertical movement of the radiation unit and the detection unit so that the radiation emitted from the radiation radiation unit is detected by the radiation detection unit during a non-destructive inspection, and performs a non-destructive inspection based on the image information received from the photographing unit. do.

In the image-based radiation inspection apparatus according to the present invention, the control unit checks a unit pipe of the water cooling wall boiler pipe and a space between the unit pipes from the image information received from the photographing unit, and radiates radiation only to the unit pipe. Can be radiated to perform non-destructive testing.

In the image-based radiographic inspection apparatus according to the present invention, the control unit performs an image interrupt based on image information received from the photographing unit to obtain a start time and an end time of the unit pipe, and the acquired start time and Non-destructive testing can be performed based on the information on the end point.

In the image-based radiographic inspection apparatus according to the present invention, the first moving platform and the second moving platform are, respectively, a first horizontal frame, a second horizontal frame, a first guide bar, a second guide bar, a plurality of detachable and detachable It may include a machine, a movable cradle, a handle, and a driver. The second horizontal frame is spaced apart from the first horizontal frame by a predetermined distance and is installed on the upper side. The first guide bar connects opposite ends of the first and second horizontal frames in a vertical direction. The second guide bar connects opposite ends of the first and second horizontal frames in a vertical direction. The plurality of detachers are installed at both ends of the first and second horizontal frames, respectively, and are detached from the water cooling wall boiler pipe. The movable cradle is connected to the first and second guide bars to move up and down, and one of the radiation emission unit and the radiation detection unit is mounted. The handle is connected to the moving cradle to move the moving cradle upward along the first and second guide bars. In addition, the actuator is installed on the first and second horizontal frames and adjusts the moving speed when the moving cradle moved toward the second horizontal frame is moved toward the first horizontal frame by its own weight.

In the image-based radiographic examination apparatus according to the present invention, the detacher may include a height adjuster, a fixing bracket, and a detachable block. The height adjuster is installed at one of both ends of the first and second horizontal frames and adjusts the height vertically. The fixing bracket is installed to face the water cooling wall boiler pipe on one side of the height adjuster. In addition, the detachable block is detachably installed on the fixing bracket, has a curved surface corresponding to the outer diameter of the water cooling wall boiler pipe so as to contact the water cooling wall boiler pipe, and is detached from the water cooling wall boiler pipe according to whether or not magnetic force is applied. .

In the image-based radiographic inspection apparatus according to the present invention, the actuator may include a shaft and a driving motor. The shaft is rotatably installed on the first horizontal frame, the second horizontal frame, and the moving cradle, and the moving cradle moves up and down according to a rotation direction. And the drive motor rotates the shaft to adjust the moving speed of the moving cradle moving downward.

The image-based radiographic inspection apparatus according to the present invention may further include a photosensor and a fall prevention line. The photosensor is installed in the radiating unit and the detection unit, which are installed to face the water cooling wall boiler pipe, to detect and align the positions of the radiation emission unit and the radiation detection unit. In addition, the fall prevention line is fixed to the radiating unit and the detection unit on one side, and the other side is hooked to a hole formed in the water cooling wall boiler pipe to prevent the radiating unit and the detection unit from falling.

In the image-based radiation inspection apparatus according to the present invention, the photosensor may sense through a hole formed in a welding portion of the water cooling wall boiler pipe.

In addition, the present invention provides an image-based radiographic inspection apparatus including a radiating unit, a detection unit, a photographing unit, and a control unit. The radiating unit is detachably installed on one surface of a water-cooled wall boiler pipe of a thermal power plant requiring non-destructive testing and is installed to be movable up and down, and radiates radiation to a welded part of the water cooling wall boiler pipe. The detection unit is detachably installed on the other surface of the water cooling wall boiler pipe opposite the radiating unit with the center of the water cooling wall boiler pipe and is installed so as to be movable up and down, and detects radiation emitted from the radiation radiation unit. The photographing unit is installed on the radiating unit facing the water cooling wall boiler pipe to photograph and output image information of the water cooling wall boiler pipe. And the control unit recognizes the unit pipe of the water cooling wall boiler pipe based on the image information received from the photographing unit while the radiating unit and the detection unit move together, and radiates radiation to the recognized unit pipe to perform a non-destructive inspection. .

The image-based radiation inspection apparatus according to the present invention performs a non-destructive inspection of a welding part of a water-cooled wall boiler pipe of a thermal power plant based on an image. That is, the non-destructive inspection of the welding part of the water-cooled wall boiler pipe is performed based on the image information photographed by the water-cooled wall boiler pipe. This makes it possible to perform non-destructive inspection without design parameters of the water-cooled wall boiler piping.

In addition, since it is possible to recognize the area between the unit pipe and the unit pipe based on the image information captured of the water cooling wall boiler pipe, it is possible to perform non-destructive inspection by radiating radiation only to the unit pipe. That is, since information about the start and end points of the non-destructive test is acquired and the non-destructive test is performed based on this, the use of unnecessary radiation can be suppressed while the non-destructive test is automatically performed. In addition, since the non-destructive inspection is automatically performed on the water-cooled wall boiler pipe based on the captured image information, there is an advantage in that the radiation inspection time can be shortened.

The image-based radiation inspection apparatus according to the present invention is easily attached and detached to the water-cooled wall boiler pipe of a thermal power plant through a moving platform on which the radiation inspection unit is installed so as to move up and down to perform non-destructive inspection of the welded part of the water cooling wall boiler pipe. It can be performed smoothly.

That is, the image-based radiation inspection apparatus according to the present invention is a water-cooled wall boiler through a radiation inspection unit that moves up and down based on the moving platform after attaching the moving platform to the water-cooled wall boiler piping portion of a thermal power plant that requires non-destructive inspection. The welded part of the pipe can be smoothly non-destructively inspected.

In addition, the image-based radiographic inspection apparatus according to the present invention moves the radiographic inspection unit upward through manipulation of the handle, and then descends basically according to the self-weight of the radiographic inspection unit, while controlling the descent speed through the actuator. Inspection can be performed.

As described above, since the image-based radiographic inspection apparatus according to the present invention operates semi-automatically, it is possible to reduce the capacity of the driving motor required for the driver. That is, when the operation of raising the radiation inspection unit is performed through the driver, a drive motor larger than the capacity of the drive motor according to the present invention is required. However, in the case of the present invention, since the driving motor is used for the purpose of basically moving down according to its own weight when the radiation inspection unit descends and adjusting the descending speed of the radiation inspection unit, a driving motor having a small capacity can be used.

Accordingly, since the image-based radiation inspection apparatus according to the present invention can reduce the total weight of the apparatus by using a drive motor having a relatively small capacity, it is easy to move the image-based radiation inspection apparatus and to the water-cooled wall boiler piping. There is an advantage that it can be removed more easily.

1 is a photograph showing a water cooling wall boiler piping.
2 is a block diagram showing an image-based radiographic examination apparatus according to an embodiment of the present invention.
3 is a schematic diagram showing a state in which the image-based radiation inspection device of FIG. 1 is attached to a water cooling wall boiler pipe of a thermal power plant.
4 is a perspective view showing a radiating unit of an image-based radiographic inspection apparatus according to an embodiment of the present invention.
5 is a side view of the radiating part of FIG. 4.
6 is an enlarged view illustrating a lower portion of the radiating unit of FIG. 4 on which the radiation radiating unit is installed.
7 is an enlarged view illustrating an upper portion of the radiating portion of FIG. 4.
8 is a diagram showing an example of design parameters of a water cooling wall boiler piping.
9 is a graph showing a pipe inspection moving area and a velocity profile according to an image-based radiographic inspection method according to an exemplary embodiment of the present invention.
10 is an exemplary diagram for explaining an image-based interrupt method acquired by the photographing unit of FIG. 3.
11 is a perspective view showing a state in which the radiating part of FIG. 3 is attached to a test bed of a water cooling wall boiler pipe of a thermal power plant.
12 is an enlarged view illustrating a state in which a radiating part is attached to a water cooling wall boiler pipe of the test bed of FIG. 11 by a detacher.
FIG. 13 is an enlarged view illustrating a non-destructive inspection of a welded portion of a water cooling wall boiler pipe of the test bed of FIG. 11.

In the following description, it should be noted that only parts necessary for understanding the embodiments of the present invention will be described, and descriptions of other parts will be omitted without distracting the gist of the present invention.

Terms or words used in the present specification and claims described below should not be construed as being limited to a conventional or dictionary meaning, and the inventor is appropriate as a concept of terms in order to describe his own invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention on the basis of the principle that it can be defined as such. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only preferred embodiments of the present invention, and do not represent all the technical spirit of the present invention, and various equivalents that can replace them at the time of application It should be understood that there may be variations and variations.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a photograph showing a water cooling wall boiler piping.

Referring to FIG. 1, the water cooling wall boiler pipe 110 installed on the water cooling wall is large and wide and cannot be integrally manufactured. Therefore, the water-cooled wall boiler pipe 110 is formed by connecting the unit-type pipe by welding.

The water cooling wall boiler pipe 110 includes a plurality of unit pipes 117 arranged in a horizontal direction and a connection part 113 connecting the plurality of unit pipes 117. The unit pipes 117 on the same line are connected to each other by welding, and a hole 115 is formed in the connection part 113 where the welding part 111 is formed in order to weld the unit pipe 117. After the unit pipe 117 is connected, the hole 115 is filled with a metal material.

Whether or not the welding part 111 of the water-cooled wall boiler pipe 110 is properly welded is checked through a non-destructive inspection using the image-based radiographic inspection apparatus 100 according to an embodiment of the present invention, which will be described later.

2 is a block diagram showing an image-based radiographic examination apparatus 100 according to an embodiment of the present invention. 3 is a schematic diagram showing a state in which the image-based radiation inspection apparatus 100 of FIG. 1 is attached to the water-cooled wall boiler pipe 110 of a thermal power plant.

2 and 3, the image-based radiation inspection apparatus 100 according to the present embodiment is a non-destructive inspection for performing a non-destructive inspection on the weld 111 by installing in a detachable manner on the water-cooled wall boiler pipe 110 It is a device.

That is, the image-based radiation inspection apparatus 100 according to the present embodiment is a water-cooled wall boiler of a thermal power plant through the moving platforms 11 and 21 on which the radiation inspection units 13 and 23 are installed so as to be semi-automatically movable up and down. As a non-destructive inspection device for the weld 111 of the water-cooled wall boiler pipe 110 by easily attaching and detaching to the pipe 110, it includes a radiating unit 10, a detection unit 20, and a control unit 90, and a photosensor ( 70) and a fall prevention line 80 may be further included. The radiation inspection units 13 and 23 include a radiation radiation unit 13 and a radiation detection unit 23. The moving platforms 11 and 21 include a first moving platform 11 on which the radiation radiation unit 13 is detachably installed, and a second moving platform 21 on which the radiation detection unit 23 is detachably installed. do.

The radiation unit 10 includes a first moving platform 11 and a radiation radiation unit 13. The first moving platform 11 is detachably installed on one surface of the water-cooled wall boiler pipe 110 of a thermal power plant requiring non-destructive testing. The radiation radiation unit 13 is installed so as to be semi-automatically movable up and down by the first moving platform 11, and radiates radiation to the welding part 111 of the water cooling wall boiler pipe 110 under the control of the control unit 90. do.

The detection unit 20 includes a second moving platform 21 and a radiation detection unit 23. The second moving platform 21 is detachably installed on the other surface of the water cooling wall boiler pipe 110 opposite the radiating part 10 with the water cooling wall boiler pipe 110 as the center. The radiation detection unit 23 is installed so as to be semi-automatically movable up and down by the second moving platform 21, and detects radiation emitted from the radiation emission unit 13 under the control of the control unit 90.

The control unit 90 controls the non-destructive inspection of the weld 111 of the water-cooled wall boiler pipe 110 through movement control of the radiating unit 10 and the detection unit 20. During the non-destructive inspection, the control unit 90 detects radiation of radiation through the radiation radiation unit 13 and radiation passing through the water cooling wall boiler pipe 110 through the radiation detection unit 23. The control unit 90 controls the movement of the radiation unit 10 and the detection unit 20 so that the radiation emitted from the radiation emission unit 13 is detected by the radiation detection unit 23.

As the control unit 90, a computer device provided exclusively for a detachable semi-automatic radiographic examination, a general personal computer, a notebook computer, a smart phone, etc. may be used, but is not limited thereto. The control unit 90 may be connected to the radiation unit 10 or the detection unit 20 in a wired or wireless manner.

The photosensor 70 is installed in the radiating unit 10 and the detection unit 20 installed facing each other around the water cooling wall boiler pipe 110 to detect the positions of the radiation radiation unit 13 and the radiation detection unit 23 To sort. That is, since the radiation radiated from the radiating unit 10 must be detected by the detection unit 20, the radiating unit 10 and the detection unit 20 need to move in alignment with each other. The photosensor 70 detects whether the radiating unit 10 and the detection unit 20 are aligned with each other and move equally when the radiating unit 10 and the detection unit 20 are moved. In this case, the photosensor 70 may include a light emitting part 71 and a light receiving part 73, the light emitting part 71 may be installed in the radiating part 10 and the light receiving part 73 may be installed in the detection part 20.

The photosensor 70 is installed at a position corresponding to the hole 115 formed in the welding part 111 of the water cooling wall boiler pipe 110. For example, the photosensor 70 may be installed on the radiation radiation unit 13 and the radiation detection unit 23, or may be installed on the moving cradle 50 of the first and second moving platforms 11 and 21.

The photographing unit 75 is installed on the radiating unit 10 facing the water-cooled wall boiler pipe 110 to capture image information of the water-cooled wall boiler pipe 110 and transmit the image information to the control unit 90. The photographing unit 75 acquires image information about the unit pipe 117 of the water cooling wall boiler pipe 110 and the hole 115 between the unit pipe 117. In this case, a camera or a non-contact sensor may be used as the photographing unit 75. The photosensor 70 may be used as a non-contact sensor.

Here, the controller 90 performs a non-destructive inspection of the weld 111 of the water cooling wall boiler pipe 110 based on the received image information. That is, the controller 90 performs an image interrupt based on the received image information, and obtains the start time and end time of the non-destructive inspection through this. And, based on the acquired information about the start point and end point, a non-destructive test is performed on the weld 111 of the water-cooled wall boiler pipe 110. At this time, the control unit radiates radiation only to the unit pipe 117 based on the received image information, and performs a non-destructive inspection in a manner that detects it.

For this reason, by radiating radiation only to the unit pipe 117 requiring non-destructive inspection, it is possible to suppress radiation from being radiated to a region other than the unit pipe 117, that is, the space 115 between the unit pipes 117. Therefore, during the non-destructive inspection, it is possible to suppress the radiation of radiation to unnecessary parts.

Meanwhile, although not shown, when the radiation inspection apparatus 100 includes a communication unit capable of communicating with a communication terminal of a worker, image information captured by the photographing unit 75 may be provided to the communication terminal of the worker. Various wired/wireless communication methods can be used as communication methods.

In addition, the fall prevention line 80 prevents the radiation unit 10 and the detection unit 20 fixedly installed on the water cooling wall boiler pipe 110 from falling due to any cause. One side of the fall prevention line 80 is fixed to the radiating unit 10 and the detection unit 20, respectively, and the other side is hooked to a hole 115 formed in the water cooling wall boiler pipe 110, and the radiating unit 10 and the detection unit (20) to prevent falling. The fall prevention line 80 includes a first fall prevention line 81 installed on the radiating unit 10 and a second fall prevention line 83 installed on the detection unit 20.

The radiation unit 10 and the detection unit 20 have the same structure only as the unit installed on the first and second moving platforms 11 and 21 is the radiation radiation unit 13 or the radiation detection unit 23. Therefore, in the following drawings, the radiation unit 10 will be described as the center.

The radiating unit 10 will be described with reference to FIGS. 4 to 7 as follows. Here, FIG. 4 is a perspective view showing the radiating unit 10 of the image-based radiographic inspection apparatus 100 according to an embodiment of the present invention. 5 is a side view of the radiating part 10 of FIG. 4. 6 is an enlarged view showing a lower portion of the radiation unit 10 of FIG. 4 on which the radiation radiation unit 13 is installed. And FIG. 7 is a view showing an enlarged upper portion of the radiating part 10 of FIG. 4.

The radiation unit 10 includes a first moving platform 11 and a radiation radiation unit 13 as described above.

The first moving platform 11 performs a function of guiding the movement of the radiation radiation unit 13 in addition to a function of supporting the radiation radiation unit 13 to be installed in the water cooling wall boiler pipe 110.

The first moving platform 11 includes a first horizontal frame 31, a second horizontal frame 33, a first guide bar 35, a second guide bar 37, a plurality of detachers 40, and It includes a cradle 50, a handle 59, and a driver 60.

The first horizontal frame 31 and the second horizontal frame 33 are installed at regular intervals. The first and second horizontal frames 31 and 33 are installed parallel to each other in a horizontal direction. The second horizontal frame 33 is disposed above the first horizontal frame 31.

Both ends of the first horizontal frame 31 and the second horizontal frame 33 are connected to each other by first and second guide bars 35 and 37 to form a square shape. The first guide bar 35 connects opposite ends of the first and second horizontal frames 31 and 33 in a vertical direction. The second guide bar 37 connects the opposite ends of the first and second horizontal frames 31 and 33 in a vertical direction. The first and second guide bars 35 and 37 are installed parallel to each other in a vertical direction.

A plurality of detachers 40 are installed at both ends of the first and second horizontal frames 31 and 33, respectively, and are detached from the water-cooled wall boiler pipe 110.

The detacher 40 may include a height adjuster 41, a fixing bracket 43, and a detachable block 45. The height adjuster 41 is installed at one of both ends of the first and second horizontal frames 31 and 33 and adjusts the height vertically. The fixing bracket 43 is installed to face the water cooling wall boiler pipe 110 on one side of the height adjuster 41. And the detachable block 45 is detachably installed on the fixing bracket 43, has a curved surface corresponding to the outer diameter of the water cooling wall boiler pipe 110 so as to contact the water cooling wall boiler pipe 110, depending on whether or not magnetic force is applied. It is detached from the water-cooled wall boiler pipe (110).

At this time, the height adjuster 41 adjusts the upper and lower positions of the detachable block 45.

As the detachable block 45, an electromagnet or a magnet may be used. In the case of an electromagnet, it can be detached from the water-cooled wall boiler pipe 110 by having or losing magnetism depending on whether electricity is applied to the detachable block 45. In the case of a magnet, the detachable block 45 may be composed of a metal block that transmits magnetic force and a magnet that transmits magnetic force through the metal block. By controlling the magnetic force through the direction control of the N pole and S pole of the magnet, the detachment block 45 can be detached from the water cooling wall boiler pipe 110.

The movable cradle 50 is connected to the first and second guide bars 35 and 37 to move up and down, and a radiation radiation unit 13 is mounted thereon. The movable cradle 50 includes a mounting plate 51 on which a window 57 to which radiation 15 is emitted or incident from a center portion is formed, and the first and second guide bars 35 and 37. Accordingly, it includes a plurality of guide blocks 53 that move up and down. The mounting plate 51 may have a groove or a protrusion through which the radiation radiation unit 13 can be mounted. The guide block 53 has guide holes 55 inserted into the first and second guide bars 35 and 37, and at least one is formed on both sides of the mounting plate 51 facing each other.

In the present embodiment, an example in which the radiation radiation unit 13 is mounted on the mounting plate 51 of the movable cradle 50 is disclosed, but is not limited thereto. For example, the mobile cradle 50 may further include a support plate on which the radiation radiation unit 13 can be mounted, and the radiation radiation unit 13 may be installed on the support plate. At this time, the base plate may be installed by being connected to the mounting plate 51 or may be integrally formed.

In this embodiment, since the movable cradle 50 of the radiating unit 10 has been described, an example in which the radiation radiation unit 13 is installed on the movable cradle 50 is disclosed, but the moving cradle 50 of the detection unit 20 A radiation detection unit 23 is installed in the. The radiation 15 radiated from the radiation radiation unit 13 is detected through the window 57 formed in the cradle of the movable cradle 50.

The handle 57 is connected to the moving cradle 50 to move the moving cradle 50 upward along the first and second guide bars 35 and 37. The operator may raise the moving cradle 50 on which the radiation radiation unit 13 is mounted toward the second horizontal frame 33 through the manipulation of the handle 57. Although the example in which the handle 57 is installed on the guide block 53 is disclosed in this embodiment, it is not limited to this.

Here, the handle 57 may be a fixed type handle used to simply lift the movable cradle 50 on which the radiation radiation unit 13 is mounted toward the second horizontal frame 33. Alternatively, the handle 57 may be a rotation type handle used to lift the moving cradle 50 on which the radiation radiation unit 13 is mounted by rotation toward the 2 horizontal frames 33. When the handle 57 is a rotation type, it may be connected to a worm gear, a pulley, a rack and a pinion gear that can manually lift the moving cradle 50.

In addition, the actuator 60 is installed on the first and second horizontal frames 31 and 33 to move the moving cradle 50 downward. The driver 60 may include a shaft 61 and a drive motor 63. The shaft 61 is rotatably installed on the first horizontal frame 31, the second horizontal frame 33, and the movable cradle 50, and receives the driving force of the drive motor 63 to provide the moving cradle 50. 1 Lower the horizontal frame 31 to the side. The drive motor 63 rotates the shaft 61 to move the connected movable cradle 50 downward. At this time, the movable cradle 50 includes a shaft 61 and moves up and down along the first and second guide bars 35 and 37.

At this time, the drive motor 63 rotates the shaft 61 to adjust the descending speed of the moving cradle 50 moving downward. That is, the moving cradle 50 moved toward the second horizontal frame 33 is basically moved downward by its own weight. When the drive motor 63 does not operate, a maximum descending speed due to its own weight of the moving cradle 50 is determined, and the maximum descending speed is proportional to the moving distance of the moving cradle 50. The driving motor 63 may adjust the speed of the moving cradle 50 moving downward by its own weight from 0 to the maximum descending speed.

In the present embodiment, an example in which the shaft 61 is connected in series to the drive shaft of the drive motor 63 and installed in a perpendicular direction to the second horizontal frame 33 is disclosed, but is not limited thereto. For example, the shaft 61 and the drive shaft of the drive motor 63 may be connected in a right angle direction using a gear. In this case, the drive motor 63 is installed parallel to the second horizontal frame 33.

In the present embodiment, an example in which the drive motor 63 is installed on the second horizontal frame 33 is disclosed, but it may be installed on the lower side of the first horizontal frame 31 on the contrary.

The detection unit 20 includes a second moving platform 21 and a radiation detection unit 23 as described above.

The second moving platform 21 performs a function of supporting the radiation detection unit 23 to be installed in the water cooling wall boiler pipe 110 and guiding the vertical movement of the radiation detection unit 23.

The second moving platform 21 includes a first horizontal frame 31, a second horizontal frame 33, a first guide bar 35, a second guide bar 37, a plurality of detachers 40, and It includes a cradle 50, a handle 57 and a driver 60.

Since the second moving platform 21 has the same structure as the first moving platform 11 except that the radiation detection unit 23 is installed on the moving cradle 50, a detailed description thereof will be omitted.

As described above, the control unit 90 performs a non-destructive inspection of the weld 111 of the water cooling wall boiler pipe 110 based on the image information received from the photographing unit 75.

Of course, as shown in FIG. 8, the non-destructive inspection may be performed based on the design parameter information of the water cooling wall boiler pipe 110. However, since the water cooling wall boiler pipe 110 according to the design parameters and the actual water cooling wall boiler pipe 110 do not exactly match, there is a limit to increasing the accuracy of the non-destructive inspection even if the design parameters are used.

In order to solve this problem, it is possible to consider a method of acquiring parameter information of the water cooling wall boiler pipe 110 through an actual measurement, but it has a problem that a lot of time is required according to the actual measurement.

However, even if the design parameters of the water cooling wall boiler pipe 110 are not known, the non-destructive inspection may be performed through an image interrupt based on image information captured by the photographing unit 75. Here, FIG. 9 shows a pipe inspection moving area (a) and a velocity profile (b). 8 and 9, it can be seen that the non-destructive inspection is performed at a location corresponding to the design parameter of the water-cooled wall boiler pipe 110.

The image interrupt will be described with reference to FIG. 10 as follows. Here, FIG. 10 is an exemplary diagram for explaining an image-based interrupt method acquired by the photographing unit 75 of FIG. 3. In FIG. 10, (a) to (e) show a captured image area, and (A) to (E) show a captured image 77.

Referring to FIG. 10, the image interrupt method refers to the start point 117a of the unit pipe 117 through boundary detection such as simple black and white, rather than using an algorithm such as object detection for an image acquired from the photographing unit 75. This is a method of deriving the end point 117b. The image interrupt method has the advantage that it can be implemented from inexpensive embedded in real time, and it is possible to obtain accurate and fast image processing results by simple black and white detection.

That is, the photographed image 77 of (A) is a case where an empty space is photographed. The photographed image 77 of (B) is an image from which the unit pipe 117 starts to be photographed. In the photographed image 77, the empty space and the unit pipe 117 can be easily identified with different colors. Accordingly, the start point 117a of the unit pipe 117 can be detected from the captured image 77 of (B). The photographed image 77 of (C) and (D) is an image of the unit pipe 117, and can be easily distinguished from the photographed image 77 of (A). In the image (E), the photographed image 77 is an image at which photographing of the unit pipe 117 is terminated. In the photographed image 77, the empty space and the unit pipe 117 can be easily identified with different colors. Accordingly, the end point 117b of the unit pipe 117 can be detected from the captured image 77 of (E). Looking at the captured images 77 of (B) and (E), it can be seen that they have opposite image types.

Accordingly, the controller 90 acquires information on the start point 117a and the end point 117b of the unit pipe 117 through an image interrupt based on the image information received from the photographing unit 75. Further, the control unit 90 performs a non-destructive inspection on the water-cooled wall boiler pipe 110 based on the information on the start point 117a and the end point 117b of the unit pipe 117.

On the other hand, when the control unit 90 has information on the design or measurement parameters of the water cooling wall boiler pipe 110, the start point 117a and the end point 117b of the unit pipe 117 obtained based on the image information A non-destructive test may be performed by reflecting information on a design or measurement parameter of the water cooling wall boiler piping 110 including information about.

A process of performing a non-destructive audit on the water-cooled wall boiler pipe 110 using the image-based radiation inspection apparatus 100 according to the present embodiment will be described with reference to FIGS. 1, 3 and 11 to 13 Then it looks like this Here, FIG. 11 is a perspective view showing a state in which the radiating part 10 of FIG. 3 is attached to the test bed of the water-cooled wall boiler pipe 110 of a thermal power plant. 12 is an enlarged view showing a state in which the radiating part 10 is attached to the water cooling wall boiler pipe 110 of the test bed of FIG. 11 by the detacher 40. And FIG. 13 is an enlarged view showing a state in which the weld 111 of the water-cooled wall boiler pipe 110 of the test bed of FIG. 11 is non-destructively inspected.

First, the first moving platform 11 is attached to the water cooling wall boiler pipe 110 using the detacher 40.

Next, the radiation radiating unit 13 is mounted on the moving cradle 50 of the first moving platform 11 to fix the radiating unit 10 to the water cooling wall boiler pipe 110.

Although not shown, in the same manner as the method of fixing the radiating unit 10 to the water cooling wall boiler pipe 110, the detection unit 20 is connected to the water cooling wall boiler pipe 110 opposite the side where the radiating unit 10 is installed. Install fixed.

Subsequently, by operating the handle 57, the moving cradle 50 is manually lifted from the first horizontal frame 31 side to the second horizontal frame 33 side. At this time, the movable cradle 50 rises upward according to the guidance of the first guide bar 35, the second guide bar 37 and the shaft 61.

Next, the control unit 90 aligns the positions of the radiation emission unit 13 and the radiation detection unit 23 according to the detection signal of the photosensor 70.

Further, the control unit 90 performs a non-destructive inspection on the weld 111 of the water-cooled wall boiler pipe 110 while lowering the radiation radiation unit 13 and the radiation detection unit 23 through the driving of the actuator 60. That is, the radiation radiation unit 13 and the radiation detection unit 23 start to move downward by their own weight, and the control unit 90 drives the radiation radiation unit 13 and the radiation detection unit 23 ), while controlling the descent speed, perform a non-destructive test.

As described above, the image-based radiation inspection apparatus 100 according to the present embodiment is a water cooling wall boiler pipe of a thermal power plant through the moving platforms 11 and 21 on which the radiation inspection units 13 and 23 are installed to be movable vertically. It is easily attached to and detached from (110), so that the non-destructive inspection of the weld 111 of the water-cooled wall boiler pipe 110 can be smoothly performed.

That is, after attaching the moving platforms 11 and 21 to the water cooling wall boiler pipe 110 of a thermal power plant requiring non-destructive inspection, the image-based radiation inspection apparatus 100 according to the present embodiment, It is possible to smoothly inspect the weld 111 of the water-cooled wall boiler pipe 110 through the radiation inspection units 13 and 23 moving downward on the basis of 21).

In addition, the image-based radiation inspection apparatus 100 according to the present embodiment performs a non-destructive inspection of the weld 111 of the water-cooled wall boiler pipe 110 of a thermal power plant based on an image. That is, a non-destructive inspection of the weld 111 of the water-cooled wall boiler pipe 110 is performed based on image information photographed by the water-cooled wall boiler pipe 110. For this reason, the non-destructive inspection can be performed without design parameters of the water cooling wall boiler pipe 110.

In addition, since the area between the unit pipe 117 and the unit pipe 117 can be recognized based on the image information captured of the water cooling wall boiler pipe 110, radiation is radiated only to the unit pipe 117 for non-destructive inspection. You can do it. That is, since information about the start and end points of the non-destructive test is acquired and the non-destructive test is performed based on this, the use of unnecessary radiation can be suppressed while the non-destructive test is automatically performed. In addition, since non-destructive inspection is automatically performed on the water-cooled wall boiler pipe 110 based on the captured image information, there is an advantage in that the radiation inspection time can be shortened.

On the other hand, the embodiments disclosed in the specification and drawings are merely presented specific examples to aid understanding, and are not intended to limit the scope of the present invention. It is obvious to those of ordinary skill in the art that other modifications based on the technical idea of the present invention may be implemented in addition to the embodiments disclosed herein.

10: radiating unit 11: first moving platform
13: radiation radiation unit 15: radiation
20: detection unit 21: second moving platform
23: radiation detection unit 31: first horizontal frame
33: second horizontal frame 35: first guide bar
37: second guide bar 40: detacher
41: height adjuster 43: fixing bracket
45: detachable block 50: mobile cradle
51: mounting plate 53: guide block
55: guide hole 57: window
59: handle 60: actuator
61: shaft 63: drive motor
70: photosensor 71: light-emitting unit
73: light receiving unit 75: photographing unit
80: fall prevention line 81: first fall prevention line
83: second fall prevention line 90: control unit
100: image-based radiographic examination device
110: water cooling wall boiler pipe 111: welding part
113: connection part 115: hole
117: unit piping

Claims (8)

A first moving platform detachably installed on one surface of a water cooling wall boiler pipe of a thermal power plant requiring non-destructive inspection, and a first moving platform installed to be semi-automatically movable up and down by the first moving platform, and radiation to the welding portion of the water cooling wall boiler pipe A radiation unit having a radiation radiation unit that emits light;
A second moving platform detachably installed on the other surface of the water cooling wall boiler pipe opposite the radiating part with the center of the water cooling wall boiler pipe, and the second moving platform installed so as to be semi-automatically movable up and down, and the radiation A detection unit including a radiation detection unit for detecting radiation emitted from the radiation unit;
A photographing unit installed on the radiating unit facing the water cooling wall boiler pipe to photograph and output image information of the water cooling wall boiler pipe;
The radiating unit and the detection unit are installed to face the water cooling wall boiler pipe to detect the positions of the radiation radiation unit and the radiation detection unit, and detect through a hole formed in the welding part of the water cooling wall boiler pipe. A photosensor for outputting a detection signal; And
Controls the vertical movement of the radiation unit and the detection unit so that the radiation emitted from the radiation radiation unit is detected by the radiation detection unit during a non-destructive inspection, but the radiation radiation unit and the radiation detection unit are in accordance with the detection signal received from the photo sensor. A control unit for aligning positions and performing a non-destructive inspection based on image information received from the photographing unit;
Image-based radiographic examination apparatus comprising a. The method of claim 1, wherein the control unit,
Image-based radiation, characterized in that the unit pipe of the water cooling wall boiler pipe and the space between the unit pipes are checked from the image information received from the photographing unit, and non-destructive inspection is performed by radiating radiation only to the unit pipe Inspection device. The method of claim 2, wherein the control unit,
An image interrupt is performed based on the image information received from the photographing unit to obtain a start time and an end time of the unit pipe, and a non-destructive inspection is performed based on the acquired start time and end time information. An image-based radiographic examination device. The method of claim 3, wherein the first moving platform and the second moving platform each,
A first horizontal frame;
A second horizontal frame spaced apart from the first horizontal frame and installed at an upper portion;
A first guide bar connecting one end of the first and second horizontal frames facing each other in a vertical direction;
A second guide bar connecting the opposite ends of the first and second horizontal frames in a vertical direction;
A plurality of detachers installed at both ends of the first and second horizontal frames and detachable from the water cooling wall boiler pipe;
A movable cradle connected to the first and second guide bars to move up and down, and on which one of the radiation radiation unit and the radiation detection unit is mounted;
A handle connected to the moving cradle to move the moving cradle upward along the first and second guide bars;
A driver installed on the first and second horizontal frames and adjusting a moving speed when the moving cradle moved toward the second horizontal frame is moved toward the first horizontal frame by its own weight;
Image-based radiographic examination apparatus comprising a. The method of claim 4, wherein the detacher,
A height adjuster installed at one of both ends of the first and second horizontal frames and adjusting the height vertically;
A fixing bracket installed at one side of the height adjuster toward the water cooling wall boiler pipe;
A detachable block detachably installed on the fixing bracket, having a curved surface corresponding to an outer diameter of the water cooling wall boiler pipe so as to contact the water cooling wall boiler pipe, and detachable from the water cooling wall boiler pipe according to whether or not magnetic force is applied;
Image-based radiographic examination apparatus comprising a. The method of claim 4, wherein the driver,
A shaft rotatably installed on the first horizontal frame, the second horizontal frame, and the movable cradle, the movable cradle vertically moving according to a rotation direction;
A drive motor for adjusting a moving speed of the moving cradle moving downward by rotating the shaft;
Image-based radiographic examination apparatus comprising a. The method of claim 3,
One side is fixed to the radiating unit and the detection unit, respectively, and the other side is a fall prevention line for preventing the radiating unit and the detection unit from falling by being hooked to a hole formed in the water cooling wall boiler pipe;
An image-based radiographic examination apparatus further comprising a. delete

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