Evaluation system and program

Abstract

To provide an evaluation device capable of determining whether repair of a flange surface is required according to the status of the flange surface of a flange.SOLUTION: An evaluation device comprises an acquisition unit which acquires three-dimensional shape data of a flange, and an evaluation unit which evaluates a status of a flange surface of the flange on the basis of the three-dimensional shape data. The evaluation unit includes a setting unit which sets an evaluation target region on the flange surface of the flange, a detection unit which detects a scratch occurring in the evaluation target region, a first distortion amount measurement unit which measures a first distortion amount of the flange surface of the flange, and a determination unit which determines whether repair of the flange surface of the flange is required on the basis of at least one of the scratch and the first distortion amount.SELECTED DRAWING: Figure 15

Description

[Technical field]

[0001] The present disclosure relates to an evaluation system and a program. [Background technology]

[0002] Conventionally, there is known a technique for measuring distortion of a flange using a portable non-contact three-dimensional coordinate measuring device. For example, JP 2017-227459 A (Patent Document 1) discloses a technique for measuring distortion of a flange surface, which requires a small space for measurement, does not lose measurement accuracy even in a field where vibration occurs, and measures not only waviness data but also flange surface inclination data. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-227459 A Summary of the Invention [Problem to be solved by the invention]

[0004] One of the causes of fluid leakage from flanges is deterioration or damage to gaskets used at pipe joints, so workers replace gaskets periodically. At this time, workers visually and tactilely check the condition of the flange surface, and if they determine that the flange surface needs repair, they carry out appropriate work (e.g., polishing, etc.). However, checking the condition of the flange surface and judging whether repair is necessary depends on the worker's technical knowledge and experience, and there is a problem that there is variation depending on the worker. Also, even if workers with little knowledge and experience check the flange surface, they often cannot judge whether the above-mentioned repair is necessary.

[0005] An object in one aspect of the present disclosure is to provide an evaluation device and an evaluation method that are capable of determining whether or not a flange surface of a flange needs to be repaired based on the condition of the flange surface. [Means for solving the problem]

[0006] An evaluation device according to an embodiment includes an acquisition unit that acquires three-dimensional shape data of a flange, and an evaluation unit that evaluates a condition of the flange surface of the flange based on the three-dimensional shape data. The evaluation unit includes a setting unit that sets an evaluation target area on the flange surface of the flange, a detection unit that detects scratches occurring in the evaluation target area, a distortion amount measurement unit that measures a first distortion amount on the flange surface of the flange, and a determination unit that determines whether or not the flange surface of the flange needs to be repaired based on at least one of the scratches and the first distortion amount.

[0007] Preferably, the judgment unit judges that the flange surface of the flange is in a state requiring repair if the length of the scratch is equal to or greater than a predetermined length, if the first distortion amount is equal to or greater than a first threshold value, or if the length of the scratch is less than a predetermined length and the depth of the scratch is equal to or greater than a predetermined depth.

[0008] Preferably, the evaluation device further includes an output control unit that outputs advice information to a user based on a determination result of the determination unit. The output control unit outputs, as the advice information, information recommending cutting or polishing the flange surface of the flange based on the determination result that the flange surface of the flange requires repair.

[0009] Preferably, the evaluation target area is divided into a first area on the radial inside of the flange and a second area on the radial outside of the flange. When at least one of a scratch of a predetermined length or more, a distortion of a first threshold value or more, and a scratch of less than a predetermined length and a predetermined depth or more is present in the second area, the output control unit further outputs information to prompt a periodic check of the flange surface of the flange.

[0010] Preferably, the acquisition unit further acquires three-dimensional shape data of another flange fastened to the flange via the sealing material. The distortion amount measurement unit further measures a second distortion amount of the flange surface of the other flange, and calculates a third distortion amount when the flange and the other flange are fastened based on the first distortion amount and the second distortion amount. If the third distortion amount is equal to or greater than the first threshold value, the determination unit determines that at least one of the flange surface of the flange and the flange surface of the other flange is in a state requiring repair.

[0011] Preferably, when the detection unit detects a first flaw and a second flaw adjacent to each other in the evaluation target area, the detection unit integrates the first flaw and the second flaw as one flaw.

[0012] Preferably, the strain amount measuring section measures the first strain amount in the circumferential direction and the radial direction of the flange.

[0013] Preferably, the evaluation target area is an area of ​​the flange surface of the flange with which the sealant comes into contact, or the entire area of ​​the flange surface.

[0014] Preferably, the opening of the flange is divided into a plurality of regions by a partition. The seal material used to fasten the flange is a branched seal material having branches that seal the surface of the partition of the flange surface of the flange. The strain amount measuring unit further measures a fourth strain amount of the surface of the partition. If the fourth strain amount is equal to or greater than a second threshold value, the judgment unit judges that the flange surface of the flange is in a state requiring repair.

[0015] An evaluation method according to another embodiment includes the steps of acquiring three-dimensional shape data of the flange, and evaluating a condition of the flange surface of the flange based on the three-dimensional shape data. The evaluating step includes setting an evaluation target area on the flange surface of the flange, detecting scratches occurring in the evaluation target area, measuring a first distortion amount of the flange surface of the flange, and determining whether or not the flange surface of the flange needs to be repaired based on at least one of the scratches and the first distortion amount. Effect of the Invention

[0016] According to the present disclosure, it is possible to determine whether or not a flange surface needs repair depending on the condition of the flange surface. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a diagram for explaining an overall configuration of an evaluation system. [Diagram 2] FIG. 2 is a block diagram showing an example of a hardware configuration of an evaluation device. [Diagram 3] 1 is a flowchart illustrating an example of an outline of the operation of the evaluation system. [Figure 4] 4 is a diagram for explaining a contact area between a flange surface of a flange and a gasket. FIG. [Diagram 5] FIG. 13 is a diagram for explaining an evaluation target region. [Figure 6] 11 is a diagram for explaining a method for calculating the length of a detected flaw. FIG. [Figure 7] FIG. 13 is a diagram for explaining a method for integrating multiple scratches. [Figure 8] FIG. 13 is a diagram for explaining a method for setting a reference height of a flange. [Figure 9] FIG. 4 is a diagram for explaining a method for measuring the amount of strain in the circumferential direction. [Figure 10] FIG. 13 is a diagram for explaining a method for measuring the amount of radial distortion. [Figure 11] FIG. 13 is a diagram for explaining a method for measuring a fastening distortion amount. [Figure 12] 11A and 11B are diagrams for explaining another example of a method for measuring the amount of fastening distortion. [Figure 13] 10 is a diagram for explaining an example of a method for measuring the amount of distortion of a partition. FIG. [Figure 14] FIG. 4 is a diagram for explaining a region of a flange surface. [Figure 15] FIG. 2 is a block diagram showing an example of a functional configuration of an evaluation device. [Figure 16] FIG. 13 is a diagram for explaining a method for calculating the area of ​​a scratch. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, the present embodiment will be described with reference to the drawings. In the following description, the same components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

[0019] <System configuration> Fig. 1 is a diagram for explaining the overall configuration of an evaluation system 1000. Referring to Fig. 1, the evaluation system 1000 is a system for evaluating the state of a flange surface (flange seat surface) of a flange 30. The evaluation system 1000 includes an evaluation device 10 and a 3D scanner 20. Note that in this embodiment, a situation is assumed in which an operator, who is a user of the evaluation device 10, uses the 3D scanner 20 to evaluate the state of the flange surface of the flange 30, for example, when replacing a used seal material that has been used to fasten the flange 30 with a new unused seal material.

[0020] The 3D scanner 20 is, for example, a portable non-contact 3D scanner that acquires three-dimensional shape data of an object (here, the flange 30) and outputs the acquired three-dimensional shape data. The 3D scanner 20 may use a known method such as a laser beam method or a pattern light projection method.

[0021] The sealing material is sandwiched between the joints of a pair of flanges 30 and fixed by tightening the bolts of the flanges 30, thereby preventing fluid from leaking from the gaps of the flanges 30. The sealing material is, for example, a fixed sealing material called a gasket. The gasket is a sealing material that can seal the gaps in the area where it is installed and provide the area with airtightness. There are various types of gaskets, and an appropriate gasket is selected depending on the usage of the piping. The sealing material may be a dynamic sealing material called a packing. In the following explanation, the case where the sealing material is a gasket will be explained.

[0022] The evaluation device 10 acquires three-dimensional shape data from the 3D scanner 20 (i.e., accepts input of three-dimensional shape data). Typically, the evaluation device 10 is configured to be able to communicate with the 3D scanner 20. In this embodiment, the evaluation device 10 evaluates the condition of the flange surface based on scratches, distortions, etc. that have occurred on the flange surface of the flange 30, based on the three-dimensional shape data of the flange 30 to be evaluated. Specifically, the evaluation device 10 determines whether or not the flange surface needs to be repaired, and outputs advice information regarding how to deal with the problem.

[0023] The evaluation device 10 typically has a structure conforming to a general-purpose computer architecture, and realizes various processes described below by a processor executing a program installed in advance. The evaluation device 10 is, for example, a laptop PC (Personal Computer). However, the evaluation device 10 may be any other device (for example, a desktop PC, a tablet terminal device) as long as it is capable of executing the functions and processes described below.

[0024] <Hardware configuration> Fig. 2 is a block diagram showing an example of a hardware configuration of the evaluation device 10. Referring to Fig. 2, the evaluation device 10 includes a processor 101, a memory 103, a display 105, an input device 107, an input / output interface (I / F) 109, and a communication interface (I / F) 111. These components are connected to each other so as to be able to communicate data with each other.

[0025] The processor 101 is typically an arithmetic processing unit such as a CPU (Central Processing Unit) or an MPU (Multi Processing Unit). The processor 101 reads out and executes a program stored in the memory 103 to control the operation of each part of the evaluation device 10. More specifically, the processor 101 realizes each function of the evaluation device 10 by executing the program.

[0026] The memory 103 is realized by a RAM (Random Access Memory), a ROM (Read-Only Memory), a flash memory, a hard disk, etc. The memory 103 stores a program executed by the processor 101, three-dimensional shape data acquired by the 3D scanner 20, etc.

[0027] The display 105 is, for example, a liquid crystal display, an organic EL (Electro Luminescence) display, etc. The display 105 may be configured integrally with the evaluation device 10, or may be configured separately from the evaluation device 10.

[0028] The input device 107 accepts operation inputs to the evaluation device 10. The input device 107 is realized by, for example, a keyboard, a button, a mouse, etc. The input device 107 may also be realized as a touch panel.

[0029] The input / output interface 109 mediates data transmission between the processor 101 and the 3D scanner 20. The input / output interface 109 is connected to, for example, the 3D scanner 20. The processor 101 acquires three-dimensional shape data measured by the 3D scanner 20 via the input / output interface 109.

[0030] The communication interface 111 mediates data transmission between the processor 101 and an external device. For example, a wireless communication method such as Bluetooth (registered trademark) or a wireless LAN (Local Area Network) is used as the communication method. Note that a wired communication method such as a USB (Universal Serial Bus) may also be used as the communication method. Note that the processor 101 may communicate with the 3D scanner 20 via the communication interface 111.

[0031] <Operation overview> Fig. 3 is a flow chart for explaining an example of an operation outline of the evaluation system. Referring to Fig. 3, the 3D scanner 20 3D scans the flange 30 to generate 3D shape data of the entire flange 30 (step S10). The evaluation device 10 (e.g., the processor 101) acquires the 3D shape data from the 3D scanner 20 and stores it in an internal memory (e.g., the memory 103) (step S12).

[0032] Based on the three-dimensional shape data, the evaluation device 10 sets an evaluation target area on the flange surface of the flange 30 (step S14). Typically, the evaluation target area is set to an area on the flange surface with which the seal material comes into contact.

[0033] The evaluation device 10 detects scratches that have occurred in the evaluation target area based on the three-dimensional shape data (step S16). The evaluation device 10 measures (calculates) the distortion of the flange surface based on the three-dimensional shape data (step S18). The evaluation device 10 determines whether or not the flange surface needs to be repaired based on at least one of the detected scratches and the measured distortion (step S20). The evaluation device 10 displays advice information to the user based on the result of the determination of whether or not the flange surface needs to be repaired (step S22).

[0034] According to the evaluation system 1000, the three-dimensional shape data of the flange surface of the flange 30 is used to detect scratches on the flange surface and measure distortion of the flange surface, and the necessity of repairing the flange surface is judged according to the state of scratches and distortion. In addition, advice information according to the judgment result is presented. Therefore, the worker can quickly grasp the necessity of repairing the flange surface and can efficiently take measures based on the advice information.

[0035] <Setting the evaluation area> Here, the specific process contents of step S14 in FIG. 3 will be described.

[0036] Fig. 4 is a diagram for explaining an example of a contact area between a flange surface of a flange and a gasket. Fig. 4(a) is a diagram for explaining the contact area between a gasket and a flange surface. Fig. 4(b) is a diagram for explaining a change in the contact area between a gasket and a flange surface. Fig. 5 is a diagram for explaining an example of an evaluation target area.

[0037] Referring to FIG. 4(a), a pair of flanges (e.g., an upper flange and a lower flange) are fastened. Specifically, the lower flange is fastened to the upper flange by bolts via a sealing material and a gasket. In FIG. 4(a), the gasket outer ring is not in contact with the bolts, and the gasket body is attached in a state of being centered at the center of the flange surface. The width W1 of the contact area between the gasket body and the flange surface (e.g., the flange surface of the upper flange) is shown. The width W1 corresponds to the radial length of the flange in the contact area.

[0038] Referring to Fig. 4(b), the gasket outer ring is in contact with the bolt, and the gasket body is shifted to the left (bolt side) compared to Fig. 4(a). Width W2 indicates the width of the contact area between the gasket body and the flange surface when the gasket outer ring is in contact with the bolt. Width W3 indicates the width of the contact area between the gasket body and the flange surface when the gasket outer ring is in contact with the opposite bolt. In this case, the gasket body is shifted to the right (opposite side of the bolt).

[0039] Although the contact area between the gasket body and the flange surface changes depending on where the gasket is placed relative to the flange surface, the width of the gasket body does not change, and therefore widths W1 to W3 have the same value.

[0040] Thus, the gasket may be installed with a play (margin) with respect to the flange (in the left - right direction of the paper surface). This play is determined by the interference of bolts, flange grooves, etc. In the example of FIG. 4, the width Wa from the outer - diameter - side end of the gasket body at the time of bolt interference to the inner - diameter - side end of the gasket body at the time of reverse - side bolt interference is the width of the contact area when play is considered. Note that the width Wb is the width from the inner - diameter - side end to the outer - diameter - side end of the flange surface.

[0041] Referring to FIG. 5, the evaluation target area 210 is the area surrounded by line 201 and line 202. The evaluation area width W of the evaluation target area 210 corresponds to the radial length of the flange in the evaluation target area 210 and is the shortest distance from line 201 to line 202. The distance from the inner - diameter - side end 205 to the outer - diameter - side end 206 of the flange surface corresponds to the width Wb in FIG. 4.

[0042] The size of the evaluation target area 210 changes according to the evaluation area width W. Specifically, the size of the evaluation target area 210 changes according to whether the evaluation area width W is set to any of the widths W1, Wa, and Wb shown in FIG. 4. Since the relationship W1 < Wa < Wb holds, when the evaluation area width W is set to the width W1, the evaluation target area 210 is the smallest, and when the evaluation area width W is set to the width Wb, the evaluation target area 210 is the largest.

[0043] When the evaluation area width W is set to the width W1, the damage is evaluated without considering the play when the gasket is installed on the flange. Therefore, for example, when the gasket is installed offset with respect to the flange, the damage occurring on the flange surface that should originally be evaluated may not be included in the evaluation target area 210.

[0044] When the evaluation area width W is set to the width Wa, the damage is evaluated considering the play when the gasket is installed on the flange. On the other hand, when the evaluation area width W is set to the width Wb, since the evaluation target area 210 is regarded as the entire area of the flange surface, the damage occurring in the entire area is evaluated.

[0045] How the evaluation area width W is set (whether it is set to width W1, Wa, or Wb) is appropriately selected by the operator depending on the purpose of evaluation.

[0046] <Detection of scratches> Here, the specific process contents of step S16 in FIG. 3 will be described.

[0047] The evaluation device 10 detects scratches that have occurred in an evaluation target area of ​​the flange surface. The scratches on the flange surface may be detected using a known technique. For example, the evaluation device 10 detects scratches on the flange surface by comparing the feature amount of the scratches pre-stored in the memory 103 with the feature amount of the image created based on the three-dimensional shape data.

[0048] Fig. 6 is a diagram for explaining a method for calculating the length of a detected scratch, Fig. 6(a) is an example of a method for calculating the length of a scratch, and Fig. 6(b) is another example of a method for calculating the length of a scratch.

[0049] Considering the state in which the gasket is installed on the flange surface, scratches extending in the radial direction have a greater effect on fluid leakage than scratches extending in the circumferential direction. Therefore, when evaluating the length of the scratch, the apparent length L of the scratch is calculated as shown in Figure 6(a) or 6(b).

[0050] With reference to FIG. 6(a), the evaluation device 10 calculates the apparent length L of the flaw detected in the evaluation target area 210. Specifically, the length L corresponds to the radial length of the flaw 50 in the flange. A line segment is drawn connecting the center O of the flange and one end P1 of the flaw 50, and a perpendicular line is drawn from the other end P2 of the flaw 50 to the line segment, and the intersection point between the line segment and the perpendicular line is defined as Q. In addition, the angle between the line segments P1P2 and P1Q is defined as θ, and the length of the line segment P1Q (i.e., “the length of the line segment P1P2”×cosθ) is calculated using the length of the line segment P1P2, the angle θ, and trigonometric functions. Then, the portion of the length of the line segment P1Q that is included in the evaluation target area 210 is calculated as the length L.

[0051] 6(b), the evaluation device 10 calculates the length L1 of the line segment connecting the center O of the flange and one end P1 of the scratch 50, and the length L2 of the line segment connecting the center O and the other end P2 of the scratch 50. The evaluation device 10 calculates the difference between the length L1 and the length L2 ("L2-L1" in the example of FIG. 6) as the length L of the scratch.

[0052] The depth D of the scratch 50 is calculated as the maximum depth of the scratch 50 using the three-dimensional shape data.

[0053] Fig. 7 is a diagram for explaining a method for integrating multiple scratches. Fig. 7(a) shows an example of a method for integrating multiple scratches. Fig. 7(b) shows another example of a method for integrating multiple scratches. Fig. 7(c) shows the length of the scratches after integrating multiple scratches.

[0054] When multiple scratches are close to each other, the evaluation device 10 integrates the multiple scratches as one scratch. With reference to FIG. 7(a), the evaluation device 10 detects scratches A1 to A3. Then, the evaluation device 10 calculates multiple integrated regions B1 to B3 corresponding to the multiple scratches A1 to A3, respectively. The integrated regions are regions that are set to determine whether the multiple scratches can be integrated as one scratch. For example, the integrated region B1 is a region that is defined by a distance of region width X from each position of the scratch A1. Similarly, the integrated regions B2 and B3 are regions that are defined by a distance of region width X from each position of the scratches A2 and A3, respectively.

[0055] The evaluation device 10 judges whether or not each of the multiple integrated regions B1 to B3 overlaps with another integrated region. In the example of Fig. 7(a), since the integrated regions B1 to B3 overlap with each other, the evaluation device 10 integrates the multiple scratches A1 to A3 into one scratch.

[0056] Referring to FIG. 7(b), the evaluation device 10 detects scratches A1 and A2 and calculates a plurality of integrated regions B1 and B2 corresponding to the plurality of scratches A1 and A2, respectively. The calculation method of the integrated region B1 will be described. A reference line showing the maximum length of the scratch A1 is drawn, and line segments C1 and C2 that are a distance of the region width X from the two ends of the scratch A1 on the reference line are obtained. Next, the ends of the scratch A1 that are located at the farthest position from the reference line in the left and right directions perpendicular to the reference line are identified. Line segments C3 and C4 that are a distance of the region width X from the ends in each identified direction are obtained. The integrated region B1 is an area surrounded by the line segments C1 to C4. The integrated region B2 is also calculated using a similar calculation method.

[0057] The evaluation device 10 judges whether or not the integrated region B1 overlaps with the integrated region B2. In the example of Fig. 7(b), since the integrated regions B1 and B2 overlap with each other, the evaluation device 10 integrates the multiple scratches A1 and A2 into one scratch.

[0058] 7(c), it is assumed that the evaluation device 10 uses the above-mentioned integration method to integrate the scratches A1 to A3 and regard them as one scratch. In this case, the maximum length of the integrated scratches is defined as the distance between a point R1 that is closest to the center O among the positions of the scratches A1 to A3 and a point R2 that is farthest from the center O among the positions of the scratches A1 to A3.

[0059] Therefore, the combined apparent length L of the scratches is calculated using the lengths of the line segments R1 and R2 by the method described in Fig. 6. The combined depth of the scratches corresponds to the depth of the deepest scratch among the scratches A1 to A3.

[0060] <Distortion measurement> Here, the specific process contents of step S18 in FIG. 3 will be described.

[0061] (Distortion of flange surface) Fig. 8 is a diagram for explaining a method for setting the reference height of a flange. Fig. 8(a) and Fig. 8(b) are diagrams for explaining a method for setting the reference point of a flange. Fig. 8(c) is a diagram for explaining a method for setting the reference circular area of ​​a flange.

[0062] When measuring distortion of a flange surface, it is necessary to set which position on the flange surface to use as the reference height. In Figures 8(a) and 8(b), reference points E1 and E2 are set, which are the reference height positions of the flange surface. Reference point E1 is set at the end of the inner diameter side of the flange surface. Reference point E2 is set at a position on the flange surface that corresponds to the end of the inner diameter side of the gasket body when it is assumed that the gasket is installed in a state centered at the center of the flange surface.

[0063] As shown in Fig. 8(b), eight reference points E1 and E2 are set at equal intervals (e.g., 45 degree intervals) around the circumference of the flange. In this case, the average value of the heights of the eight reference points E1 is set as the reference height. Alternatively, the average value of the heights of the eight reference points E2 is set as the reference height.

[0064] 8(c), a circular area that is a specified value (e.g., 1 mm) or more from the end of the inner diameter side of the flange surface is defined as a reference circular area. In this case, the average value of the heights of the positions included in the reference circular area is set as the reference height.

[0065] The difference between the reference height set as described above and the flange surface is measured as the distortion amount of the flange surface.

[0066] Fig. 9 is a diagram for explaining a method for measuring the amount of distortion in the circumferential direction. With reference to Fig. 9, the evaluation device 10 measures the amount of distortion of the flange in the circumferential direction of the flange. A plurality of check lines are drawn in the radial direction from the center O of the flange. Typically, the check lines are drawn at equal intervals (for example, at 45 degree intervals) in the radial direction of the flange, but for ease of explanation, Fig. 9 will explain a configuration in which three check lines 221 to 223 are drawn.

[0067] Assuming that the gasket is attached in a centered state at the center of the flange surface, three circumferential check lines N1 to N3 are drawn at equal intervals between the inner diameter side end 215 and the outer diameter side end 216 of the gasket body. Note that a configuration in which three circumferential lines are drawn at equal intervals between the inner diameter side end 205 and the outer diameter side end 206 of the flange surface may also be used. Alternatively, a configuration in which three or more circumferential lines are drawn may also be used.

[0068] Based on the three-dimensional shape data, the evaluation device 10 calculates the heights of the intersections of the check lines N1 to N3 and the check lines 221 to 223. For example, the evaluation device 10 calculates the heights of the intersections M1 to M3 of the check line N1 and the check lines 221 to 223, and extracts the maximum height TAmax and the minimum height TAmin of the intersections M1 to M3. For example, it is assumed that the height of the intersection M1 of the intersections M1 to M3 is extracted as the maximum height TAmax, and the height of the intersection M3 is extracted as the minimum height TAmin.

[0069] The reference height set in Fig. 8 is "Ts". The evaluation device 10 measures the greater of the absolute value of the difference between the reference height Ts and the height TAmax (i.e., |TAmax-Ts|) and the absolute value of the difference between the reference height Ts and the height TAmin (i.e., |TAmin-Ts|) as the maximum circumferential distortion amount along the check line N1. The evaluation device 10 measures the maximum circumferential distortion amounts along the check lines N2 and N3 using a similar calculation method.

[0070] The evaluation device 10 extracts the maximum value of the maximum circumferential distortion amounts along the check lines N1 to N3 (i.e., the three maximum distortion amounts) as the maximum circumferential distortion amount G1 of the flange surface. Typically, the evaluation device 10 compares the maximum distortion amount G1 with an allowable distortion amount Th1 (e.g., 0.15 mm) to determine whether the measured circumferential distortion amount is allowable.

[0071] 10 is a diagram for explaining a method for measuring the amount of distortion in the radial direction. Referring to Fig. 10, an evaluation device 10 measures the amount of distortion of the flange in the radial direction of the flange.

[0072] Specifically, multiple check lines are drawn radially from the center O of the flange as in Fig. 9. Typically, the check lines are drawn at equal intervals (e.g., 45 degree intervals) around the circumference of the flange, but for ease of explanation, Fig. 10 will describe a configuration in which two check lines 251, 252 are drawn.

[0073] Four measurement points are provided at equal intervals between end 205 on the inner diameter side of the flange surface and end 206 on the outer diameter side. Alternatively, four measurement points may be provided at equal intervals between end 215 and end 216. The intervals between the measurement points are preferably 5 mm or less. Alternatively, the number of measurement points may be four or more.

[0074] Based on the three-dimensional shape data, the evaluation device 10 calculates the heights of the measurement points on each of the check lines 251, 252. For example, the evaluation device 10 calculates the heights of the measurement points K1 to K4 on the check line 251, and extracts the maximum height TBmax and the minimum height TBmin among the measurement points K1 to K4. For example, it is assumed that the height of the measurement point K1 is extracted as the maximum height TBmax and the height of the measurement point K3 is extracted as the minimum height TBmin among the measurement points K1 to K4.

[0075] The evaluation device 10 measures the greater of the absolute value of the difference between the reference height Ts and the height TBmax (i.e., |TBmax-Ts|) and the absolute value of the difference between the reference height Ts and the height TBmin (i.e., |TBmin-Ts|) as the maximum radial distortion amount along the check line 251. The evaluation device 10 measures the maximum radial distortion amount along the check line 252 by a similar calculation method.

[0076] The evaluation device 10 extracts the maximum value of the maximum radial distortion amounts (i.e., the two maximum distortion amounts) along the check lines 251, 252 as the maximum radial distortion amount G2 of the flange surface. Typically, the evaluation device 10 compares the maximum distortion amount G2 with the allowable distortion amount Th1 to determine whether the measured radial distortion amount is allowable.

[0077] (Distortion of the upper and lower flanges) The amount of distortion of the flange surfaces of the upper and lower flanges alone can be measured by the method described in Figures 8 to 10. However, in practice, the upper and lower flanges are used in a fastened state via a gasket, so it is preferable to measure the degree of distortion that occurs when the upper and lower flanges are fastened. Here, a method for measuring the amount of distortion of the fastened body in which the upper and lower flanges are fastened (hereinafter also referred to as "fastened body distortion amount") is described.

[0078] Figure 11 is a diagram for explaining a method for measuring the amount of fastening distortion. Figure 11(a) is a diagram for explaining the amount of distortion of the upper and lower flanges. Figure 11(b) is a diagram for explaining the amount of distortion of the fastened body.

[0079] 11(a), the amount of distortion of the upper flange and the amount of distortion of the lower flange are both less than the allowable amount of distortion Th1, and therefore the evaluation device 10 determines that the amount of distortion of each of the upper flange and the lower flange is within the allowable amount of distortion.

[0080] 11(b), the evaluation device 10 calculates the amount of strain of the fastened body of the upper flange and the lower flange based on the amount of strain of each of the upper flange and the lower flange. Specifically, the total value of the amount of strain at each position of the upper flange and the amount of strain at each position of the lower flange that faces each position of the upper flange when the upper flange and the lower flange are fastened is calculated as the amount of strain of the fastened body.

[0081] 11(a), for example, the upper flange is distorted upward (in the +Th direction) and the lower flange is also distorted upward in region 301. Therefore, the amount of distortion of the fastened body of the upper and lower flanges does not increase and is less than the allowable distortion amount Th1.

[0082] On the other hand, in region 302, the upper flange is distorted upward, but the lower flange is distorted downward (-Th direction), so the amount of distortion of the fastened body of the upper and lower flanges becomes large and exceeds the allowable distortion amount Th1.

[0083] The evaluation device 10 extracts the maximum value of the fastened body strain amount and compares the maximum value with the allowable strain amount Th1 to determine whether the strain amount of the fastened body in which the upper and lower flanges are fastened is allowable or not.

[0084] 12A and 12B are diagrams for explaining another example of a method for measuring the amount of fastening distortion. Fig. 12(a) is a diagram for explaining the amount of distortion of the upper and lower flanges. Fig. 12(b) is a diagram for explaining the amount of distortion of the fastened body.

[0085] In the example of Fig. 12(a), there are scratches and attachments on the flange surface of the lower flange. In this way, when scratches and attachments are present on the flange surface, the distortion amount may be calculated taking these into consideration. Referring to Fig. 12(b), it can be seen that the fastener distortion amount is equal to or greater than the allowable distortion amount Th1 in the area where scratches and attachments are present on the flange surface of the lower flange.

[0086] (Distortion of partition) Heat exchangers and the like use flanges in which an opening is divided into multiple regions (e.g., two regions) by a partition. A gasket with a branch is applied to the flange to seal the partition. When the surface of the partition is gradually worn away due to use of the flange or deterioration over time, fluid leakage from one region to the other may occur. Therefore, in such flanges, the amount of distortion of the surface of the partition provided on the flange surface is measured.

[0087] Figure 13 is a diagram for explaining an example of a method for measuring the amount of distortion of a partition. Figure 13(a) is a diagram showing a flange with a partition. Figure 13(b) is a diagram for explaining the amount of distortion of the partition.

[0088] As shown in Fig. 13(a), the opening of the flange with partitions is divided into multiple regions (two regions in this case) by the partitions. A gasket with branches that has branches that seal the surface of the partitions on the flange surface is used to fasten the flange with partitions.

[0089] Fig. 13(b) shows the amount of distortion in region 310 in Fig. 13(a). The amount of distortion of the flange surface (other than the surface of the partition) other than the partition and the amount of distortion of the surface of the partition are measured. In the example of Fig. 13(b), the amount of distortion of the surface of the partition is equal to or greater than the allowable distortion amount Th2 (e.g., 0.25 mm).

[0090] The evaluation device 10 compares the maximum value of the amount of distortion on the surface of the partition member with the allowable amount of distortion Th2 to determine whether or not the amount of distortion on the surface of the partition member is allowable.

[0091] <Judgment on the necessity of repairs> Here, the specific process contents of step S20 in FIG. 3 will be described.

[0092] As described above, the evaluation device 10 judges whether or not the flange surface needs repair based on at least one of the detected scratches and the measured amount of distortion. Specifically, the evaluation device 10 judges whether or not the flange surface needs repair based on the following conditions.

[0093] (Condition Z1) Condition Z1 is a condition based on the length Lmax of the flaw or the amount of distortion of the flange, where the maximum length Lmax is the maximum value among the lengths L of the multiple flaws detected.

[0094] The evaluation device 10 judges whether or not the condition Z1a that the maximum length Lmax of the scratch is equal to or greater than the reference value Lx1 is satisfied. Here, the width of the gasket body used for the flange (i.e., the width of the contact area where the gasket body contacts the flange surface) is Wx. In this case, for example, the reference value Lx1 is set to "Wx x (3 / 4)". Therefore, the reference value Lx1 is changed depending on the type of gasket, etc. If the maximum length Lmax is equal to or greater than the reference value Lx1 (i.e., the condition Z1a is satisfied), the evaluation device 10 judges that the flange surface is in a state requiring repair.

[0095] The evaluation device 10 also judges whether the distortion of the flange surface is equal to or greater than the allowable distortion Th1 (e.g., 0.15 mm). Specifically, the evaluation device 10 judges whether or not the condition Z1b is satisfied that both the maximum circumferential distortion G1 of the flange surface and the maximum radial distortion G2 of the flange surface are equal to or greater than the allowable distortion Th1. If both the maximum distortion G1 and the maximum distortion G2 are equal to or greater than the allowable distortion Th1 (i.e., condition Z1b is satisfied), the evaluation device 10 judges that the flange surface is in a state requiring repair.

[0096] In summary, when at least one of the conditions Z1a and Z1b is satisfied (ie, when the condition Z1 is satisfied), the evaluation device 10 judges that the flange surface is in a state requiring repair.

[0097] The evaluation device 10 also evaluates the severity of the flange surface. The severity is evaluated on an 11-point scale from "0 to 10." The higher the severity value, the more serious the condition of the flange surface (i.e., the worse the condition of the flange surface). When condition Z1 is satisfied, the condition of the flange surface is quite serious, and in this case, the evaluation device 10 evaluates the severity of the flange surface as "10."

[0098] (Condition Z2) Condition Z2 is a condition based on the amount of strain in the fastened body.

[0099] The evaluation device 10 determines whether or not condition Z2, that is, the maximum fastener strain is equal to or greater than the allowable strain Th1, is met. If the maximum fastener strain is equal to or greater than the allowable strain Th1 (i.e., condition Z2 is met), the evaluation device 10 determines that the flange surfaces are in a state requiring repair. More specifically, the evaluation device 10 determines that at least one of the flange surfaces of the upper flange and the lower flange is in a state requiring repair. If condition Z2 is met, the evaluation device 10 evaluates the severity of the flange surfaces as "4."

[0100] (Condition Z3) Condition Z3 is a condition based on the type of gasket, the length L and the depth D of the flaw.

[0101] First, a case will be described where the gasket used in the flange is a hard gasket. In this case, the evaluation device 10 judges whether or not the condition Z3a that a scratch having a length L less than the reference value Lx1 and equal to or greater than the reference value Lx2 is satisfied. For example, the reference value Lx2 is set to "Wx x (1 / 2)". If the gasket is a hard gasket and a scratch having a length L less than the reference value Lx1 and equal to or greater than the reference value Lx2 is present (i.e., the condition Z3a is satisfied), the evaluation device 10 judges that the flange surface is in a state requiring repair.

[0102] Next, a case where the gasket used in the flange is a soft gasket will be described. In this case, the evaluation device 10 judges whether or not the condition Z3b that a scratch exists having a length L that is less than a reference value Lx1 and equal to or greater than a reference value Lx2 and a depth D that is equal to or greater than a reference value Dx1 (e.g., 0.13 mm) is satisfied.

[0103] If the gasket is a soft gasket and has a scratch having a length L that is less than the reference value Lx1 and greater than or equal to the reference value Lx2, and a depth D that is greater than or equal to the reference value Dx1 (i.e., satisfying condition Z3b), the evaluation device 10 determines that the flange surface is in a state requiring repair.

[0104] In summary, when at least one of the conditions Z3a and Z3b is satisfied (i.e., when the condition Z3 is satisfied), the evaluation device 10 judges that the flange surface is in a state requiring repair. When the condition Z3 is satisfied, the evaluation device 10 evaluates the severity of the flange surface as "8".

[0105] (Condition Z4) Condition Z4 is a condition based on the amount of strain in the fastened body and the depth D of the flaw.

[0106] The evaluation device 10 judges whether or not condition Z4 is satisfied, that is, the sum of the maximum fastener strain amount and the flaw depth D is equal to or greater than a reference value ThD. If the sum is equal to or greater than the reference value ThD (i.e., condition Z4 is satisfied), the evaluation device 10 judges that the flange surfaces are in a state requiring repair. More specifically, the evaluation device 10 judges that at least one of the flange surfaces of the upper flange and the lower flange is in a state requiring repair. If condition Z4 is satisfied, the evaluation device 10 evaluates the severity of the flange surfaces as "2."

[0107] (Condition Z5) Condition Z5 is a condition based on the type of gasket, the length L and the depth D of the flaw.

[0108] First, a case where the gasket used in the flange is a hard gasket will be described. In this case, the evaluation device 10 judges whether or not the condition Z5a that a scratch having a length L less than the reference value Lx2 and equal to or greater than the reference value Lx3 and a depth D equal to or greater than the reference value Dx2 (e.g., 0.25 mm) is satisfied is satisfied. For example, the reference value Lx3 is set to "Wx x (1 / 4)". If the gasket is a hard gasket, and a scratch having a length L less than the reference value Lx2 and equal to or greater than the reference value Lx3 and a depth D equal to or greater than the reference value Dx2 is present (i.e., the condition Z5a is satisfied), the evaluation device 10 judges that the flange surface is in a state requiring repair.

[0109] Next, a case where the gasket used in the flange is a soft gasket will be described. In this case, the evaluation device 10 judges whether or not the condition Z5b that a scratch exists having a length L that is less than a reference value Lx2 and equal to or greater than a reference value Lx3 and a depth D that is equal to or greater than a reference value Dx3 (e.g., 0.75 mm) is satisfied.

[0110] If the gasket is a soft gasket and has a scratch having a length L that is less than the reference value Lx2 and greater than or equal to the reference value Lx3, and a depth D that is greater than or equal to the reference value Dx2 (i.e., satisfying condition Z5b), the evaluation device 10 determines that the flange surface is in a state requiring repair.

[0111] In summary, when at least one of the conditions Z5a and Z5b is satisfied (i.e., when the condition Z5 is satisfied), the evaluation device 10 judges that the flange surface is in a state requiring repair. When the condition Z5 is satisfied, the evaluation device 10 evaluates the severity of the flange surface as "6".

[0112] (Condition Z6) Condition Z6 is a condition based on the type of gasket, the maximum length Lmax of the flaw, and the depth D of the flaw.

[0113] First, a case where the gasket used in the flange is a hard gasket will be described. In this case, the evaluation device 10 judges whether or not the condition Z6a that a scratch having a length L less than a reference value Lx3 and a depth D equal to or greater than a reference value Dx3 (e.g., 0.75 mm) is present is satisfied.

[0114] If the gasket is a hard gasket and has a scratch with a length L less than the reference value Lx3 and a depth D greater than or equal to the reference value Dx3 (i.e., condition Z6a is satisfied), the evaluation device 10 determines that the flange surface is in a state requiring repair.

[0115] Next, a case where the gasket used in the flange is a soft gasket will be described. In this case, the evaluation device 10 judges whether or not the condition Z6b that a scratch having a length L less than a reference value Lx3 and a depth D equal to or greater than a reference value Dx4 (e.g., 1.25 mm) is satisfied.

[0116] If the gasket is a soft gasket and has a scratch with a length L less than the reference value Lx3 and a depth D greater than or equal to the reference value Dx4 (i.e., condition Z6b is satisfied), the evaluation device 10 determines that the flange surface is in a state requiring repair.

[0117] In summary, when at least one of the conditions Z6a and Z6b is satisfied (i.e., when the condition Z6 is satisfied), the evaluation device 10 judges that the flange surface is in a state requiring repair. When the condition Z6 is satisfied, the evaluation device 10 evaluates the severity of the flange surface as "6".

[0118] (Condition Z7) Condition Z7 is a condition specific to flanges with partitions. Specifically, condition Z7 is a condition based on the type of gasket and the amount of distortion on the surface of the partition.

[0119] A case will be described where the gasket used in the flange is a hard gasket. In this case, the evaluation device 10 judges whether or not the condition Z7a that the maximum distortion amount of the surface of the partition is equal to or greater than the allowable distortion amount Th2 (e.g., 0.25 mm) is satisfied. If the gasket is a hard gasket and the maximum distortion amount is equal to or greater than the allowable distortion amount Th2 (i.e., satisfies the condition Z7a), the evaluation device 10 judges that the flange surface is in a state requiring repair.

[0120] Next, a case where the gasket used in the flange is a soft gasket will be described. In this case, the evaluation device 10 judges whether or not the condition Z7a that the maximum distortion amount of the surface of the partition is equal to or greater than the allowable distortion amount Th3 (e.g., 0.5 mm) is satisfied. If the gasket is a soft gasket and the maximum distortion amount is equal to or greater than the allowable distortion amount Th3 (i.e., satisfies condition Z7b), the evaluation device 10 judges that the flange surface is in a state requiring repair.

[0121] In summary, when at least one of the conditions Z7a and Z7b is satisfied (ie, when the condition Z7 is satisfied), the evaluation device 10 judges that the flange surface is in a state requiring repair.

[0122] (summary) If any of the conditions Z1 to Z7 is satisfied, the evaluation device 10 determines that the flange surface is in a state requiring repair. Also, if any of the conditions Z1 to Z6 is satisfied, the evaluation device 10 evaluates the severity of the flange surface according to the satisfied condition.

[0123] On the other hand, if none of the conditions Z1 to Z7 are satisfied, the condition of the flange surface is considered to be good, and therefore, in this case, the evaluation device 10 determines that repair of the flange surface is not necessary.

[0124] <Display advice information> Here, the specific process contents of step S22 in FIG. 3 will be described.

[0125] (If condition Z1 is met) The evaluation device 10 identifies the maximum value among the depth D of the flaw having the maximum length Lmax, the maximum distortion amount G1, and the maximum distortion amount G2. The evaluation device 10 displays advice information including the necessity of repairing the flange surface and a severity level of "10" on the display 105. The advice information also includes information recommending cutting or polishing to an amount equal to or greater than the identified maximum value plus a predetermined value (e.g., 0.05 mm).

[0126] (If condition Z2 is met) The evaluation device 10 displays advice information including the fact that the flange surface needs repair and the severity level of "4" on the display 105. The advice information also includes information recommending cutting or grinding to an amount equal to or greater than the maximum fastener distortion amount plus a predetermined value (e.g., 0.05 mm).

[0127] (If condition Z3 is met) The evaluation device 10 displays advice information including the fact that the flange surface needs repair and the severity level "8" on the display 105. The advice information includes information recommending cutting or polishing to a depth D of the scratch that caused the condition Z3 to be satisfied plus a predetermined value (e.g., 0.05 mm) or more.

[0128] (If condition Z4 is met) The evaluation device 10 displays advice information including the fact that the flange surface needs repair and the severity level of "2" on the display 105. The advice information also includes information recommending cutting or grinding to an extent equal to or greater than the maximum fastener distortion amount plus a predetermined value (e.g., 0.05 mm).

[0129] (If condition Z5 is met) The evaluation device 10 displays advice information including the fact that the flange surface needs repair and the severity level "6" on the display 105. The advice information includes information recommending cutting or polishing to a depth D of the scratch that caused the condition Z5 to be satisfied plus a predetermined value (e.g., 0.05 mm) or more.

[0130] (If condition Z6 is met) The evaluation device 10 displays advice information including the fact that the flange surface needs repair and the severity level "6" on the display 105. The advice information includes information recommending cutting or polishing to a depth D of the scratch that caused the condition Z6 to be satisfied plus a predetermined value (e.g., 0.05 mm) or more.

[0131] (If condition Z7 is met) The evaluation device 10 displays advice information including the fact that repair of the flange surface is necessary due to an abnormality in the partition on the display 105. The evaluation device 10 also includes information recommending cutting or polishing a predetermined value (e.g., 0.05 mm) or more based on the minimum height of the partition portion. The evaluation device 10 calculates the minimum height of the partition portion based on the maximum amount of distortion of the surface of the partition.

[0132] (Regarding gasket changes) If any of the conditions Z1 to Z7 is satisfied, the advice information may include information that encourages consideration of changing the gasket fastening surface pressure, the width of the gasket body, and the type of gasket. In this case, the user considers increasing the width of the gasket body using the same gasket. For example, the width of the inner diameter side and the outer diameter side of the gasket may be increased by 1 mm each, and the above-mentioned evaluation device 10 may be used again to determine whether or not the flange surface needs to be repaired. In this way, if it is determined that the flange surface does not need to be repaired, it is possible to deal with the problem by only changing the gasket. In this case, it is confirmed that the area in which the fastening body distortion amount is within ±0.05 mm occupies 3 / 4 or more of the gasket area. In addition, since the tightening force changes when the gasket area increases, a strength judgment is made based on the flange and bolt strength (for example, yield point, allowable stress, etc.).

[0133] (Flange face area) Fig. 14 is a diagram for explaining the regions of the flange surface. With reference to Fig. 14, the flange surface is divided in half in the radial direction, and the region on the inner diameter side of the flange surface is designated as Fi, and the region on the outer diameter side of the flange surface is designated as Fo. The evaluation device 10 judges whether the damage and the amount of distortion that caused the determination that repair is required are present in the region Fi or the region Fo.

[0134] Here, of the regions Fi and Fo, the gasket contact surface pressure is greater in the region Fo on the outer diameter side. Therefore, scratches and distortions in the region Fo have a large effect on fluid leakage. Therefore, when the evaluation device 10 determines that scratches and distortions that caused the determination that repair is required exist in the region Fo, the evaluation device 10 may be configured to output information urging regular checks as advice information. For example, the advice information may include a sentence such as "Perform regular checks during operation as there is a high possibility of leakage."

[0135] (Maintenance information) The advisory information may include information regarding maintenance of the flange face.

[0136] The evaluation device 10 calculates a ratio H1 of the maximum distortion amount (e.g., maximum distortion amounts G1, G2) of the flange surface to the allowable distortion amount Th1 (e.g., 0.15 mm) of the flange surface. The evaluation device 10 calculates a ratio H2 of the maximum value of the fastened body distortion amount to the allowable distortion amount Th1. The evaluation device 10 calculates a ratio H3 of the depth D to a reference value of the scratch depth (e.g., reference values ​​Dx1 to Dx4). The evaluation device 10 calculates a ratio H4 of the minimum height of the measured flange surface to the height of the flange surface when new.

[0137] The evaluation device 10 outputs, as advice information, a recommendation for repair or equipment replacement at the time of the next maintenance for each of the ratios H1 to H3 when the ratio is 80% or more. The evaluation device 10 outputs, as advice information, a recommendation for repair or equipment replacement at the time of the next maintenance for each of the ratios H1 to H3 when the ratio is 60% or more. The evaluation device 10 outputs, as advice information, a recommendation for equipment replacement when the ratio H4 is less than 40%, and outputs, as advice information, a recommendation for equipment replacement planning when the ratio H4 is 40% or more and less than 60%.

[0138] The evaluation device 10 may calculate each of the ratios H1 to H4 during periodic maintenance and plot the ratios H1 to H4 in a time series graph.

[0139] <Functional configuration> Fig. 15 is a block diagram showing an example of a functional configuration of the evaluation device 10. Referring to Fig. 15, the evaluation device 10 includes, as main functional components, a data acquisition unit 401, an evaluation unit 403, and an output control unit 405. Each of these functions is realized, for example, by the processor 101 of the evaluation device 10 executing a program stored in the memory 103. Note that some or all of these functions may be configured to be realized by hardware.

[0140] The data acquisition unit 401 acquires three-dimensional shape data of the flange. Specifically, the data acquisition unit 401 acquires the three-dimensional shape data of the flange from the 3D scanner 20 via the input / output interface 109 (or the communication interface 111). Typically, the data acquisition unit 401 acquires three-dimensional shape data of a pair of flanges (e.g., an upper flange and a lower flange) fastened via a sealing material.

[0141] The evaluation unit 403 evaluates the state of the flange surface of the flange based on the three-dimensional shape data. Specifically, the evaluation unit 403 includes a setting unit 411, a detection unit 413, a distortion amount measurement unit 415, and a judgment unit 417.

[0142] The setting unit 411 sets an evaluation target area on the flange surface. Specifically, the setting unit 411 sets the evaluation target area (for example, evaluation target area 210 in FIG. 5) according to the above-mentioned <Setting of evaluation target area>. The evaluation target area is an area on the flange surface with which the seal material comes into contact, or the entire area of ​​the flange surface. The contact area includes an area where the seal material comes into contact with the flange surface when the seal material is attached in a state of being centered at the center of the flange surface, and an area where the seal material comes into contact with the flange surface when the play when the seal material is installed on the flange is taken into consideration.

[0143] The evaluation target region may be divided into a first region (for example, region Fi) on the radial inner side of the flange, and a second region (for example, region Fo) on the radial outer side of the flange.

[0144] The detection unit 413 detects scratches occurring in the evaluation target area 210 based on the three-dimensional shape data. In one aspect, when the detection unit 413 detects a first scratch (e.g., scratch A1 in FIG. 7) and a second scratch (e.g., scratch A2 in FIG. 7) that are adjacent to each other in the evaluation target area 210 according to the above-mentioned method of integrating multiple scratches, the detection unit 413 integrates the first scratch and the second scratch into one scratch. The detection unit 413 outputs a result of the scratch detection to the determination unit 417. The detection result includes the length L of the detected scratch, the depth D of the scratch, etc.

[0145] The distortion amount measuring unit 415 measures the distortion amount of the flange surfaces based on the three-dimensional shape data. Typically, the distortion amount measuring unit 415 measures the distortion amount of the flange surfaces of a pair of flanges. In one aspect, the distortion amount measuring unit 415 measures the distortion amount of the flange surfaces in the circumferential direction according to the measurement method described in FIG. 9, and measures the distortion amount of the flange surfaces in the radial direction according to the measurement method described in FIG. 10.

[0146] In another aspect, the strain measurement unit 415 calculates the amount of strain of the fastened body when the upper flange and the lower flange are fastened based on the amount of strain of the upper flange and the amount of strain of the lower flange. Specifically, the strain measurement unit 415 calculates the amount of strain of the fastened body according to the measurement method described in FIG.

[0147] In still another aspect, the distortion amount measuring unit 415 measures the distortion amount of the surface of the partition among the flange surfaces. Specifically, the distortion amount measuring unit 415 measures the distortion amount of the surface of the partition according to the measurement method described in FIG.

[0148] The determination unit 417 determines whether or not the flange surface needs to be repaired based on at least one of the damage and the amount of distortion of the flange surface.

[0149] In one aspect, when the length of the scratch (e.g., the maximum length Lmax of the scratch) is equal to or greater than a predetermined length (e.g., a reference value Lx1) or when the distortion of the flange surface is equal to or greater than an allowable distortion Th1, the judgment unit 417 judges that the flange surface is in a state requiring repair. Also, when the length of the scratch (e.g., the length L) is less than a predetermined length (e.g., a reference value Lx1) and the depth of the scratch (e.g., the depth D) is equal to or greater than a predetermined depth (e.g., a reference value Dx1), the judgment unit 417 judges that the flange surface is in a state requiring repair.

[0150] The judgment unit 417 may determine whether a scratch of a predetermined length or more, a distortion of the allowable distortion amount Th1, or a scratch less than a predetermined length and greater than a predetermined depth is present in a first region (e.g., region Fi) on the radial inner side of the flange, or a second region (e.g., region Fo) on the radial outer side of the flange.

[0151] In another aspect, when the fastener strain amount is equal to or greater than the allowable strain amount Th1, the judgment unit 417 judges that at least one of the flange surfaces of the upper flange and the lower flange is in a state requiring repair.

[0152] In still another aspect, when the amount of distortion of the surface of the partition is equal to or greater than the allowable distortion amount Th3, the determination unit 417 determines that the flange surface is in a state requiring repair.

[0153] The output control unit 405 outputs advice information to the user based on the determination result of the determination unit 417. Specifically, the output control unit 405 outputs, as advice information, information recommending cutting or polishing the flange surface based on the determination result that the flange surface of the flange is in a state requiring repair.

[0154] If scratches of a predetermined length or more, distortion of the allowable distortion amount Th1, and scratches less than a predetermined length and greater than a predetermined depth are present in the second region (e.g., region Fo), the output control unit 405 further outputs information prompting regular checking of the flange surface.

[0155] Typically, the output control unit 405 displays on the display 105 the contents described above in <Display of advice information>.

[0156] <Advantages> According to this embodiment, it is possible to determine whether or not the flange surface needs repair based on the state of scratches and distortions on the flange surface, regardless of the technical knowledge and experience of the worker. In addition, there is no variation in the necessity of repair depending on the worker. Furthermore, the advice information allows the worker to efficiently take measures on the flange surface.

[0157] <Other embodiments> (1) In the above-described embodiment, the area occupied by the detected flaw may be calculated. Fig. 16 is a diagram for explaining a method for calculating the flaw area. With reference to Fig. 16, a sector-shaped area 80 is defined as the flaw area. The area 80 is an area surrounded by a straight line 271 drawn from the center O of the flange to one end J1 of the flaw 60, a straight line 272 drawn from the center O to the other end J2 of the flaw 60, and lines 201 and 202 indicating the evaluation target area.

[0158] The evaluation device 10 (for example, the determination unit 417) determines that the flange surface requires repair when the ratio of the total area of ​​the plurality of scratches to the entire area of ​​the flange surface is equal to or greater than a predetermined ratio (for example, 1%).

[0159] The area of ​​a specified ratio (e.g., 1%) of the total area of ​​the flange surface is defined as "Sf", and the total area of ​​the multiple scratches is defined as "Sd". In this case, if the ratio H5 of the area Sd to the area Sf is 80% or more, the evaluation device 10 outputs as advice information that repairs and equipment replacement are recommended at the time of the next maintenance, and if the ratio H5 is 60% or more, the evaluation device 10 outputs as advice information that repairs or equipment replacement are recommended at the time of the next maintenance.

[0160] (2) In the above-described embodiment, a program for causing a computer to function and execute the control as described in the above-described flowchart can also be provided. Such a program can be provided as a program product by being recorded on a non-transitory computer-readable recording medium such as a flexible disk, a CD-ROM (Compact Disk Read Only Memory), a secondary storage device, a main storage device, or a memory card that is attached to the computer. Alternatively, the program can be provided by being recorded on a recording medium such as a hard disk built into the computer. The program can also be provided by downloading via a network.

[0161] The program may be one that executes processing by calling necessary modules in a predetermined sequence at a predetermined timing among program modules provided as part of a computer's operating system (OS). In that case, the program itself does not include the above modules and executes processing in cooperation with the OS. Such a program that does not include a module may also be included in the program according to the present embodiment. Furthermore, the program according to the present embodiment may be one that is provided by being incorporated into a part of another program. In that case, the program itself does not include modules included in the other program, and executes processing in cooperation with the other program. Such a program incorporated into another program may also be included in the program according to the present embodiment.

[0162] (3) The configurations exemplified as the above-mentioned embodiments are merely examples of the configurations of the present invention, and may be combined with other known technologies, or may be modified, such as by omitting some parts, without departing from the scope of the present invention. In addition, the above-mentioned embodiments may be implemented by appropriately adopting the processes and configurations described in other embodiments.

[0163] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the scope and meaning equivalent to the claims. [Explanation of symbols]

[0164] 10 Evaluation device, 20 3D scanner, 30 flange, 101 processor, 103 memory, 105 display, 107 input device, 109 input / output interface, 111 communication interface, 210 evaluation target area, 401 data acquisition unit, 403 evaluation unit, 405 output control unit, 411 setting unit, 413 detection unit, 415 distortion amount measurement unit, 417 judgment unit, 1000 evaluation system.

Claims

1. An acquisition unit that acquires three-dimensional shape data indicating the shape of a flange having a flange surface that contacts a sealing material; a display unit that displays information indicating a result of evaluation of the deterioration of the flange surface detected based on the three-dimensional shape data.

2. An acquisition unit that acquires three-dimensional shape data indicating the shape of a flange having a flange surface that contacts a sealing material; a display unit that displays information indicating the state of the flange surface detected based on the three-dimensional shape data.

3. An evaluation system as described in claim 1 or claim 2, further comprising an evaluation unit that calculates the difference between the shape of the flange obtained from the three-dimensional shape data and a predetermined standard, and generates the information corresponding to the distortion of the flange surface based on the difference.

4. The evaluation system described in Claim 3, characterized in that the evaluation unit determines the height of the flange surface based on the three-dimensional shape data, obtains data indicating a reference height of the flange as the reference, and determines the difference between the height of the flange surface and the reference height.

5. The evaluation system described in Claim 4, characterized in that the evaluation unit determines the amount of distortion of the flange surface based on the difference, compares the amount of distortion with an allowable amount of distortion, and generates the information corresponding to the distortion of the flange surface.

6. The evaluation unit: The length and depth of the flaw occurring on the flange surface are determined based on the three-dimensional shape data, and data indicating reference values for the length and depth of the flaw are obtained. The evaluation system according to claim 5, further comprising: comparing the length and depth of the flaw with the reference values to generate the information corresponding to at least one of the distortion of the flange surface and the flaw.

7. The allowable strain amount is 0.15 mm, When the width of the contact area where the sealing material and the flange surface are in contact is Wx, the reference value of the length of the scratch is Wx × (1 / 4), Wx × (1 / 2), or Wx × (3 / 4), The evaluation system according to claim 6 , wherein the reference value of the depth of the scratch is 0.13 mm or 0.25 mm.

8. 8. The evaluation system according to claim 7, wherein the information indicates at least one of the degree of deterioration of the flange surface, including the flaw or the distortion, and whether or not the flange surface needs repair.

9. An acquisition unit that acquires three-dimensional shape data indicating the shape of a flange having a flange surface that contacts a sealing material; and A program that causes a computer to function as a display unit that displays information indicating the results of an evaluation of the deterioration of the flange surface detected based on the three-dimensional shape data.

10. An acquisition unit that acquires three-dimensional shape data indicating the shape of a flange having a flange surface that contacts a sealing material; and A program causing a computer to function as a display unit that displays information indicating the state of the flange surface detected based on the three-dimensional shape data.

Images