System for measuring thickness of piping in plant and method for preventive maintenance of piping in plant

Abstract

To provide a piping plate thickness measuring system of a plant and a piping preventive maintenance method of the plant capable of improving work efficiency.SOLUTION: A system for measuring a thickness of a pipe in a plant according to the present invention is a system for measuring a thickness of a pipe in a plant, comprising: a display unit for displaying information on measurement; and a position adjusting unit for adjusting a display position of the display unit and a position of an actual pipe, wherein the display unit displays a previously measured value stored in advance. In the piping preventive maintenance method of the plant for measuring the plate thickness of the piping, the display position of a display part for displaying information related to measurement and the position of the actual piping are adjusted, and a previously stored previous measurement value is displayed at the display part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a plant piping wall thickness measurement system and a plant piping preventive maintenance method. [Background technology]

[0002] The following techniques have been disclosed for preventive maintenance of multiple pipes that make up plants such as nuclear power plants and chemical plants.

[0003] Patent Document 1 discloses a method for inspecting pipes, in which a sheet with holes formed in advance corresponding to the positions to be inspected is provided, the sheet is wrapped around the outer periphery of the pipe whose inner surface is to be inspected, and the hole portion of the wrapped sheet is inspected. (Patent Document 1, paragraph

[0005] , etc.)

[0004] Patent Document 2 discloses a technology for checking the condition of reinforcing bars embedded in concrete, which includes a storage unit that stores image information of an object captured before the object is covered by a structure, and a display control unit that displays the image information stored in the storage unit on a display unit from outside the structure formed by covering the object, in correspondence with the structure.

[0005] etc.

[0005] Patent Document 3 describes an inspection system and method including an acquisition time recording unit that records the acquisition time when a data acquisition unit acquires target data, a data comparison unit that compares target data corresponding to a first acquisition time and a second acquisition time, a change detection unit that detects changed portions in the target area based on the comparison results by the data comparison unit, a work database that stores work information related to work performed in the target area, a data exclusion unit that excludes target data for changed portions caused by the work based on the work information stored in the work database from the output targets, and a data output unit that outputs target data related to changed portions other than those excluded by the data exclusion unit (see paragraph

[0007] of Patent Document 3, etc.). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 6-18247 [Patent Document 2] Japanese Patent Publication No. 2022-166912 [Patent Document 3] Japanese Patent Publication No. 2022-63600 Summary of the Invention [Problem to be solved by the invention]

[0007] However, Patent Documents 1 to 3 do not take into consideration various information about the measurement location, detection of measurement abnormalities, the necessity of additional measurements, and the like.

[0008] An object of the present invention is to provide a plant piping wall thickness measurement system and a plant piping preventive maintenance method that can improve work efficiency. [Means for solving the problem]

[0009] The plant pipe wall thickness measurement system of the present invention is a plant pipe wall thickness measurement system for measuring the wall thickness of a pipe, and is characterized in that it comprises a display unit that displays information related to the measurement, and a position adjustment unit that adjusts the position of the display on the display unit and the position of the actual pipe, and the display unit displays the previous measurement value that has been stored in advance.

[0010] Alternatively, the preventive maintenance method for piping in a plant of the present invention is characterized in that, in the preventive maintenance method for piping in a plant for measuring the wall thickness of piping, the position of the display on a display unit that displays information about the measurement and the position of the actual piping are adjusted, and the previous measurement value that has been stored in advance is displayed on the display unit. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a plant piping wall thickness measurement system and a plant piping preventive maintenance method that can improve work efficiency. [Brief explanation of the drawings]

[0012] [Figure 1] 1 shows a flow of on-site visualization of pipe wall thickness measurement results according to this embodiment. [Figure 2] An example of a measurement mark display according to this embodiment is shown below. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments are illustrative for explaining the present invention, and some omissions and simplifications have been made as appropriate for clarity of explanation. The present invention can be implemented in various other forms. Unless otherwise specified, each component may be singular or plural.

[0014] In order to facilitate understanding of the invention, the position, size, shape, range, etc. of each component shown in the drawings may not represent the actual position, size, shape, range, etc. Therefore, the present invention is not necessarily limited to the position, size, shape, range, etc. disclosed in the drawings. [Example]

[0015] The integrity of piping in nuclear and thermal power plants is ensured by periodically measuring the thickness of the pipes and understanding the degree of wall thinning. When measuring wall thickness, inspectors use an ultrasonic thickness gauge on-site for each joint and pipe within the range and pitch specified by standards. However, joints have structural discontinuities and curves, so even if an abnormal measurement value (such as a thicker plate than the previous measurement) is found, it is not possible to compare it with the previous value on-site, making it difficult to determine whether or not there is an abnormality. In addition, wall thinning evaluation is performed at a desk in an office or other location after measurement. If additional detailed measurements (at finer intervals) are required for areas with severe wall thinning, the inspector must return to the site to conduct the detailed measurements. An example of how to perform such work efficiently is described below.

[0016] 1 shows a flow chart for visualizing the results of pipe wall thickness measurements on-site according to this embodiment. The plant pipe wall thickness measurement system of this embodiment includes a measurement location number data storage unit DB01 that stores data on the locations where the pipe wall thickness is measured, a previous measurement value data storage unit DB02 that stores data on the previous thickness measurement, an inspection order data storage unit DB03 that stores data on the inspection order of the locations where the pipe wall thickness is measured, a current measurement value data storage unit DB04 that stores data on the current thickness measurement, a measurement tolerance data storage unit DB05 that stores tolerance data on the measured values, a detailed measurement determination value data storage unit DB06 that stores data for determining whether detailed measurements are necessary, and a detailed measurement pitch data storage unit DB07 that stores pitch data for detailed measurements.

[0017] It also includes a display unit S101 that displays various data necessary for the inspection, a position adjustment unit S102 that aligns the measurement point, a measurement abnormality determination unit S103 that determines whether there is an abnormality in the measurement, and a detailed measurement necessity determination unit S104 that determines whether detailed measurement is necessary.

[0018] Next, the preventive maintenance flow using the pipe wall thickness measurement system will be described. First, the measurement of the first location will be described. In this Example 1, the hologram function of the display unit S101 is activated. Then, based on the measurement location number acquired from the measurement location number data storage unit DB01, the position adjustment unit S102 aligns the hologram displayed on the display unit S101 with the wall thickness measurement mark (the measurement starting point, the first point in the circumferential direction) engraved on the pipe.

[0019] After aligning the hologram with the wall thickness measurement mark engraved on the actual pipe, the measurement location number and the previous measurement value that has been stored in advance and acquired from the previous measurement value data storage unit DB02 are displayed on the display unit S101.

[0020] The system is equipped with a position adjustment unit S102 that adjusts the display position of the display unit S101 and the position of the actual piping. By displaying the previous measurement value stored in advance on the display unit S101, it is possible to check the previous condition of the relevant measurement point before taking measurements, and it is possible to prepare for abnormality judgment.

[0021] In pipe wall thickness measurement, the detection of abnormal measurement values ​​and the determination of whether further measurement is necessary are instantly displayed as digital data on a hologram near the pipe measurement mark, realizing efficient work without backtracking. In other words, there is no need to return to the office for various checks and evaluations, and the next task can be performed on the spot. Furthermore, because on-site operations can be performed efficiently, radiation exposure at the site can be reduced, there is no need to reattach and detach scaffolding, and safety can be ensured by immediate measurement of abnormal measurement points.

[0022] In this way, by using a display device to visualize the thickness distribution (digital data) at each measurement point from the previous measurement, abnormal measurement values ​​can be instantly detected during measurement and a warning to remeasure can be displayed immediately. Another advantage is that detailed measurements can be performed on the spot for areas with severe thinning.

[0023] In this embodiment, a hologram is used as the display unit S101. Although a tablet or the like can also be used, the use of a hologram allows for efficient measurement work, such as when measuring multiple locations consecutively. [Example]

[0024] Next, the flow after measuring the first location will be explained. Measurement work is carried out at the measurement location displayed in Example 1, and the measurement results are recorded in the current measurement value data storage unit DB04. After that, based on the measurement value tolerance obtained from the measurement value tolerance data storage unit DB05, the measurement abnormality determination unit S103 compares the magnitude relationship between (previous measurement value + measurement value tolerance) and the current measurement value, and if (previous measurement value + measurement value tolerance) is less than the current measurement value, an alert indicating a measurement abnormality "is present" is displayed on the display unit S101. Then, the process returns to the measurement work, and the measurement is re-measured and the measurement value is confirmed.

[0025] The measurement abnormality determination unit S103 can compare the previous measurement value with the current measurement value to determine whether there is a measurement abnormality, and can efficiently proceed to the appropriate next step, such as detailed measurement. [Example]

[0026] Next, the flow from the detailed measurement necessity determination to the detailed measurement "necessary" will be described. In the second embodiment, if (previous measurement value + measurement tolerance) is equal to or greater than the current measurement value, the detailed measurement necessity determination unit S104 compares the current measurement value with a predetermined detailed determination measurement value based on the detailed determination measurement value acquired from the detailed measurement determination value data storage unit DB06.

[0027] If the current measurement value is equal to or less than the detailed judgment measurement value, the location number, previous measurement value, current measurement value, measurement abnormality "no", and detailed measurement judgment "required" are displayed as measurement marks on the display unit S101.

[0028] If the current measurement value exceeds the detailed judgment measurement value, the location number, previous measurement value, current measurement value, measurement abnormality "no", and detailed measurement judgment "fail" are displayed as measurement marks on the display unit S101.

[0029] Thereafter, if the detailed measurement judgment is "necessary," the measurement location number acquired from the measurement location number data storage unit DB01 and the detailed measurement pitch acquired from the detailed measurement pitch data storage unit DB07 are displayed on the display unit S101. After that, the detailed measurement work is performed and the measurement results obtained are recorded in the current measurement value data storage unit DB04.

[0030] By providing a measurement abnormality determination unit that compares the previous measurement value with the current measurement value to determine whether a measurement abnormality has occurred, and a detailed measurement necessity determination unit that compares the current measurement value with a predetermined detailed measurement determination value to determine whether a detailed measurement is necessary, it is possible to determine whether a measurement abnormality has occurred and whether a detailed measurement should be performed next.

[0031] Furthermore, by displaying the results determined by the measurement abnormality determination unit S102 and the results determined by the detailed measurement necessity determination unit S103 on the display unit S101, the worker can make a decision on the spot, which means that efficient on-site work is possible. [Example]

[0032] Next, a flow from the detailed measurement necessity determination to the detailed measurement "no" flow and a flow after the detailed measurement is completed will be described.

[0033] In the third embodiment, if the detailed measurement is judged "failed," the information of the location number, the previous measurement value, the current measurement value, the measurement abnormality "no" and the detailed measurement judgment "failed" is displayed as a measurement mark on the display unit S101, and the next measurement is carried out. Alternatively, the detailed measurement is judged "necessary," and the detailed measurement work is completed, and then the next measurement is carried out.

[0034] For the next measurement location, the measurement location number obtained from the measurement location number data storage unit DB01 and the previous measurement value obtained from the previous measurement value data storage unit DB02 are displayed on the display unit S101, and Examples 1 to 3 are carried out in the same manner, and measurements are taken at all measurement locations. [Example]

[0035] Next, an example of information displayed on the display unit S101 will be described. This is an example in which a worker wears goggles or the like and displays a hologram.

[0036] Figure 2 shows an example of the measurement mark display related to this embodiment. In Figure 2(a), the area around the mark 1 is colored green using a hologram to display "measured." This allows workers to easily see that measurements have been completed when checking multiple measurement points.

[0037] In addition, in Figure 2(b), the area around the marking 1 is colored red with a hologram, and the "measurement location," location number (XXX-XXX), current measurement value (value), previous measurement value (value), whether there is a measurement abnormality (no), and whether a detailed measurement judgment is required (no) are displayed. This allows workers to easily identify the location being measured when checking multiple measurement locations, and to understand the plate thickness condition at that location on the spot.

[0038] In addition, in Figure 2(c), the circle around the marking 1 is colored blue using a hologram, and displays "Measurement NEXT", the location number (YYY-YYY), the current measurement value (untouched), the previous measurement value (value), whether there is a measurement abnormality (untouched), and whether a detailed measurement judgment is required (untouched). This allows workers to easily identify the next measurement location when checking multiple measurement locations, allowing for more efficient work.

[0039] As described above, the ability to display measurement information such as whether or not a measurement has been taken and its status makes workers' work more efficient and easier. In addition, displaying the status in different colors makes it easier for workers to understand, which also helps reduce human error. [Explanation of symbols]

[0040] 1...Stamp, 2...Green, 3...Red, 4...Blue, DB01: Measurement location No. data storage section, DB02: Previous measurement value data storage section, DB03: Inspection order data storage section, DB04: Current measurement value data storage section, DB05: Measurement tolerance data storage section, DB06: Detailed measurement judgment value data storage section, DB07: Detailed measurement pitch data storage section, S101...display section, S102...position adjustment section, S103...measurement abnormality determination section, S104…Detailed measurement necessity determination section

Claims

1. In a plant pipe wall thickness measurement system that measures pipe wall thickness, a display unit that displays information about the measurement; a position adjustment unit that adjusts the display position of the display unit and the actual position of the piping; The display unit displays a previously measured value stored in advance, in accordance with a pipe wall thickness measurement system for a plant.

2. 2. The plant piping wall thickness measurement system according to claim 1, A tube sheet thickness measurement system characterized by comprising a measurement abnormality determination unit that compares the previous measurement value with the current measurement value and determines a measurement abnormality.

3. 2. The plant piping wall thickness measurement system according to claim 1, a measurement abnormality determination unit that compares the previous measurement value with the current measurement value to determine a measurement abnormality; A plant piping wall thickness measurement system comprising a detailed measurement necessity determination unit that compares the current measurement value with a predetermined detailed measurement determination value to determine whether detailed measurement is necessary.

4. 4. The plant piping wall thickness measurement system according to claim 3, The display unit Displaying the result determined by the measurement abnormality determination unit; A plant piping wall thickness measurement system characterized in that the result determined by the detailed measurement necessity determination unit is displayed.

5. 2. The plant piping wall thickness measurement system according to claim 1, The display unit has a hologram function.

6. A method for preventive maintenance of piping in a plant, which measures the wall thickness of piping, Adjust the display position of the display unit that displays information about the measurement and the actual position of the piping, A plant piping preventive maintenance method, characterized in that the display unit displays a previously measured value stored in advance.

7. 7. The plant piping preventive maintenance method according to claim 6, comparing the previous measurement value with the current measurement value to determine a measurement abnormality; A plant piping preventive maintenance method, characterized in that the current measurement value is compared with a predetermined detailed measurement judgment value to determine whether detailed measurement is necessary.

8. The plant piping preventive maintenance method according to claim 7, The method for preventive maintenance of piping in a plant, wherein the display unit displays the result of the determination of the measurement abnormality and the result of the necessity of detailed measurement.

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