WO2021060156A1 - 管肉厚測定装置及び管肉厚測定システム - Google Patents

管肉厚測定装置及び管肉厚測定システム Download PDF

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Publication number
WO2021060156A1
WO2021060156A1 PCT/JP2020/035318 JP2020035318W WO2021060156A1 WO 2021060156 A1 WO2021060156 A1 WO 2021060156A1 JP 2020035318 W JP2020035318 W JP 2020035318W WO 2021060156 A1 WO2021060156 A1 WO 2021060156A1
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WO
WIPO (PCT)
Prior art keywords
wall thickness
thickness measuring
tube wall
measuring device
heat transfer
Prior art date
Application number
PCT/JP2020/035318
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English (en)
French (fr)
Japanese (ja)
Inventor
原田　朋弘
Original Assignee
三菱重工環境・化学エンジニアリング株式会社
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Application filed by 三菱重工環境・化学エンジニアリング株式会社 filed Critical 三菱重工環境・化学エンジニアリング株式会社
Priority to CN202080066334.2A priority Critical patent/CN114424021B/zh
Publication of WO2021060156A1 publication Critical patent/WO2021060156A1/ja

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
    • G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/28—Details, e.g. general constructional or apparatus details providing acoustic coupling, e.g. water

Definitions

  • the present invention relates to a pipe wall thickness measuring device for measuring the wall thickness of a heat transfer tube of a boiler, and a pipe wall thickness measuring system using the device.
  • the present application claims priority with respect to Japanese Patent Application No. 2019-175605 filed in Japan on September 26, 2019, the contents of which are incorporated herein by reference.
  • the thickness of the heat transfer tube (boiler tube) of the boiler is regularly used using ultrasonic waves.
  • the measurement is made. That is, ultrasonic inspection (UT: Ultrasonic Testing), which is a kind of non-destructive inspection, is performed.
  • UT Ultrasonic Testing
  • the ultrasonic probe used in the water immersion UT oscillates ultrasonic waves toward the tube wall of the heat transfer tube. Then, the ultrasonic probe receives the ultrasonic waves reflected by the tube wall. Therefore, in the water immersion UT, the wall thickness of the tube wall of the heat transfer tube can be appropriately measured by arranging the ultrasonic probe on the central axis of the heat transfer tube.
  • Patent Document 1 a tube wall thickness measuring device having a telescopic mechanism for arranging an ultrasonic probe on the central axis of the heat transfer tube, and a tube wall thickness using the device.
  • Many measurement systems have been developed.
  • each expansion / contraction mechanism operates completely independently, and is not related to the operation of other expansion / contraction mechanisms. Therefore, when the expansion of one expansion / contraction mechanism and the expansion of another expansion / contraction mechanism are deviated, the ultrasonic probe is not arranged on the central axis of the heat transfer tube. As a result, water immersion UT may not be properly performed.
  • each expansion / contraction mechanism is connected to each other. Since the devices operate in the same way as each other, the ultrasonic probe is properly placed on the central axis of the heat transfer tube.
  • the ultrasonic probe can be appropriately arranged on the central axis of the heat transfer tube to accurately carry out water immersion UT, and the size can be reduced in the length direction of the axis of the central axis of the heat transfer tube.
  • a tube wall thickness measuring device capable of increasing the number of heat transfer tubes capable of carrying out water immersion UT, and a tube wall thickness measuring system using the device.
  • the tube wall thickness measuring device of the present invention is a tube wall thickness measuring device that measures the wall thickness of a heat transfer tube, and oscillates ultrasonic waves on the tube wall of the heat transfer tube and receives ultrasonic waves reflected by the tube wall.
  • An ultrasonic probe having a sensor portion and a cylindrical portion for fixing the sensor portion, the cylindrical portion is inserted, and a fixing portion for fixing the cylindrical portion and the cylindrical portion are inserted into the fixed portion.
  • a movable portion that is movable, at least three expansion / contraction mechanisms that are arranged at equal intervals in the circumferential direction of the cylindrical portion and are connected to the fixed portion and the moving portion, and two expansion / contraction mechanisms that are adjacent to each other in the circumferential direction.
  • the telescopic mechanism has a rod-shaped parallel leg portion arranged between the mechanisms and having an urging member connecting the fixing portion and the moving portion, and the telescopic mechanism has wheels arranged at both ends, and the parallel leg portion and the above-mentioned parallel leg portion. It is provided with a rod-shaped and rotatable first link and second link for connecting the fixed portion at different locations, and a rod-shaped and rotatable third link for connecting the second link and the moving portion.
  • each expansion / contraction mechanism has a configuration in which the urging member connecting the fixed portion and the moving portion expands to contract, and the urging member contracts to expand. Therefore, the tube wall thickness measuring device can be miniaturized in the length direction of the axis of the central axis of the heat transfer tube. Therefore, it is possible to increase the number of heat transfer tubes that can carry out water immersion UT.
  • the ultrasonic probe can be appropriately arranged on the central axis of the heat transfer tube to accurately carry out the water immersion UT, and the size of the water can be reduced in the length direction of the axis of the central axis of the heat transfer tube. It is possible to provide a tube wall thickness measuring device capable of increasing the number of heat transfer tubes capable of performing immersion UT, and a tube wall thickness measuring system using the device.
  • FIG. 1 shows the tube wall thickness measuring system 100 using the tube wall thickness measuring apparatus 1 of embodiment of this invention. It is a figure which shows the state in which the expansion / contraction mechanism 17 of the tube wall thickness measuring apparatus 1 is expanded. It is a cross-sectional view along the central axis of a cylindrical portion 14, and is a figure which shows that when the expansion and contraction mechanism 17 of a pipe wall thickness measuring apparatus 1 expands, the expansion range is limited by a screw 31. It is a figure which looked at the tube wall thickness measuring apparatus 1 in the axial direction of the central axis of the cylindrical part 14 and from the side of a cable 3, and is the figure which shows the state in which the expansion / contraction mechanism 17 expanded.
  • the tube wall thickness measuring device of the present invention and the tube wall thickness measuring system using the device will be described with reference to the drawings.
  • the tube wall thickness measuring system 100 will be described with reference to FIG. 1, and then the tube wall thickness measuring device 1 will be described in detail with reference to FIGS. 2 to 6.
  • the tube wall thickness measuring system 100 is a system for measuring the wall thickness of the heat transfer tube 2, and one end is connected to the tube wall thickness measuring device 1 which will be described in detail later and the cylindrical portion (described later) of the tube wall thickness measuring device 1. It has at least a cable 3, an analyzer 4 connected to the other end of the cable 3, and a display device 5 for displaying the result of calculation by the analyzer 4.
  • the analyzer 4 calculates the wall thickness of the heat transfer tube 2 based on the ultrasonic waves received by the sensor unit (described later) of the tube wall thickness measuring device 1.
  • the analyzer 4 causes the display device 5 to display the result of the calculation (information regarding the wall thickness of the heat transfer tube 2).
  • the analyzer 4 is an arithmetic unit such as a computer.
  • the analyzer 4 and the display device 5 such as a monitor will be described separately, but for example, a notebook computer (Personal Computer) in which the analyzer 4 and the display device 5 are integrated may be used.
  • the cable 3 is bendable, and an electric signal (specifically, information corresponding to the ultrasonic wave received by the sensor unit) is transmitted from the sensor unit (described later) of the tube wall thickness measuring device 1 to the analyzer 4. It is a cable that transmits.
  • the cable 3 includes a water pipe for supplying water to the sensor unit (described later) of the pipe wall thickness measuring device 1. Further, the inside of the heat transfer tube 2 is filled with water.
  • the boiler In a plant equipped with a boiler, such as a coal-fired boiler of a thermal power plant and a waste heat boiler for power generation provided in a waste incinerator, the boiler is provided with a plurality of heat transfer tubes 2.
  • the plurality of heat transfer tubes 2 provided in the boiler are connected orthogonally and in communication with the tube gathering 6 extending in the horizontal direction.
  • the pipe gathering 6 is provided with a pipe base 8 protruding in the horizontal direction at an end facing the corridor 7, which is a passage through which an operator can work.
  • the tube base 8 has a tubular shape having an outer diameter smaller than the outer diameter of the tube group 6, and is arranged coaxially with the tube group 6.
  • One end of the pipe base 8 is connected to the pipe gathering 6 in communication with each other.
  • the other end of the tube base 8 is closed by welding (or by a flange structure) a metal plate so that there is no opening.
  • the other end is opened when the pipe wall thickness measuring device 1 is inserted into the pipe gathering 6.
  • the cable winding device 9 can automatically (or manually) wind the cable 3 and automatically (or manually) pull it out.
  • the guide tube 10 is a device that guides the tube wall thickness measuring device 1 to a predetermined heat transfer tube 2 connected to the tube gathering 6.
  • the wire operating device 11 arranged in the corridor 7 and the tip of the guide pipe 10 are connected by a wire. Then, when the worker operates the wire operating device 11, the tip can be bent in a direction of about 90 ° with respect to the central axis of the pipe gathering 6. Since the central axis of the tube gathering 6 and the central axis of the heat transfer tube 2 are orthogonal to each other, the tube wall thickness measuring device 1 can be easily inserted into the predetermined heat transfer tube 2.
  • the wire operating device 11 may be arranged on a workbench 12 having an appropriate height.
  • the tube wall thickness measuring device 1 has at least the following configuration. That is, the tube wall thickness measuring device 1 has an ultrasonic probe.
  • the ultrasonic probe includes a sensor unit 13 that oscillates ultrasonic waves on the tube wall of the heat transfer tube 2 and receives ultrasonic waves reflected by the tube wall, and a cylindrical portion 14 that fixes the sensor unit 13.
  • the tube wall thickness measuring device 1 includes a fixing portion 15, a moving portion 16, at least three expansion / contraction mechanisms 17, and an urging member 18.
  • the cylindrical portion 14 is inserted into the fixing portion 15 to fix the cylindrical portion 14.
  • the moving portion 16 is made movable with respect to the fixed portion 15 through which the cylindrical portion 14 is inserted.
  • the expansion / contraction mechanism 17 is arranged at equal intervals in the circumferential direction of the cylindrical portion 14 and is connected to the fixed portion 15 and the moving portion 16.
  • the urging member 18 is arranged between two telescopic mechanisms 17 adjacent to each other in the circumferential direction, and connects the fixing portion 15 and the moving portion 16.
  • the expansion / contraction mechanism 17 is a rod-shaped and rotating rod-shaped parallel leg portion 20 having wheels 19 arranged at both ends, and a rod-shaped parallel leg portion 20 and a fixing portion 15 are connected at different positions. It includes a movable first link 21 and a second link 22, and a rod-shaped and rotatable third link 23 that connects the second link 22 and the moving portion 16.
  • the ultrasonic probe, the fixing portion 15, and the moving portion 16 will be described in this order, and finally, the expansion / contraction mechanism 17 will be described.
  • the cylindrical portion 14 and the sensor portion 13 included in the ultrasonic probe will be described in order.
  • the cylindrical portion 14 has a cylindrical shape formed of metal, resin, or the like.
  • a sensor portion 13 is fixed to one end of the cylindrical portion 14.
  • the cable 3 is fixed to the other end of the cylindrical portion 14.
  • the central axis of the cylindrical portion 14 is coaxial with the central axis of the cable 3.
  • the cylindrical portion 14 sandwiches and fixes the cable 3 from its periphery.
  • the inner diameter of the other end of the cylindrical portion 14 is designed to be substantially the same as or slightly larger than the outer diameter of the cable 3. Therefore, the outer diameter of the cylindrical portion 14 is larger than the outer diameter of the cable 3.
  • the sensor unit 13 oscillates ultrasonic waves toward the tube wall of the heat transfer tube 2, that is, in the radial direction Dr orthogonal to the axial direction Da of the central axis of the heat transfer tube 2. Then, the ultrasonic waves (reflected waves) reflected by the tube wall are received.
  • the central axis of the sensor unit 13 is coaxial with the central axis of the cylindrical portion 14 and is coaxial with the central axis of the heat transfer tube 2.
  • the sensor unit 13 is provided with a mirror that reflects ultrasonic waves.
  • the mirror is arranged at an angle of 45 ° from the central axis of the sensor unit 13. Then, water is injected from the water pipe included in the cable 3 and the water wheel connected to the mirror is rotated by the water pressure, so that the mirror rotates with the central axis of the sensor unit 13 as the rotation axis. Therefore, the ultrasonic waves transmitted by the sensor unit 13 on the central axis are oscillated toward the tube wall in all directions around the central axis of the heat transfer tube 2. Further, the sensor unit 13 receives and receives the ultrasonic waves reflected by the tube wall by the mirror.
  • the fixing portion 15 includes a columnar through hole 24 (24a) having a central axis coaxial with the central axis of the cylindrical portion 14 (see FIG. 3). Since the diameter of the through hole 24a is substantially the same as the outer diameter of the cylindrical portion 14, the cylindrical portion 14 can be inserted into the through hole 24a. However, the cylindrical portion 14 is fixed so as not to be easily removed from the fixing portion 15. Although not shown, for example, a screw is screwed from the radial direction of the fixing portion 15 toward the cylindrical portion 14 inserted into the through hole 24, the cylindrical portion 14 is pressed by the tip of the screw, and the cylindrical portion 14 is the fixing portion 15. You may fix it so that it does not come off. Of course, it may be designed so that the cylindrical portion 14 does not easily come off from the fixed portion 15 simply by inserting it into the fixed portion 15.
  • the fixing portion 15 has two different shapes in the axial direction (longitudinal direction) Da. There are two, a plate-shaped first fixing portion 15a and a prismatic second fixing portion 15b.
  • the first fixing portion 15a is formed in a substantially circular shape (see FIG. 4) when viewed from the axial direction Da and the cable 3 side, or when viewed in the radial direction (width direction) Dr perpendicular to the axial direction Da.
  • the second fixing portion 15b is formed in a substantially regular polygon corresponding to the total number of the expansion / contraction mechanisms 17 when viewed from the axial direction Da and the sensor portion 13 side, or when viewed from the radial direction Dr.
  • the first fixing portion 15a and the second fixing portion 15b may be formed separately and then connected, or may be molded by a "mold” and integrally formed at one time.
  • the dimension of the axial direction Da of the first fixing portion 15a, in other words, the thickness of the "plate-shaped" portion is about 1/3 of that of the second fixing portion 15b.
  • the second fixing portion 15b has a substantially regular triangular prism shape (see FIG. 5).
  • One of the three telescopic mechanisms 17 is arranged on each of the three side surfaces of the substantially regular triangular prism.
  • each corner of the substantially regular polygon is chamfered for arranging an urging member 18 such as a spring (for example, a coil spring) or rubber. Therefore, when the total number of the expansion / contraction mechanisms 17 is three, the second fixed portion 15b has a shape of a regular triangular prism, but can be said to have a hexagonal prism shape when chamfering is taken into consideration (see FIG. 5). Since the urging members 18 are arranged at each chamfered portion, the number of urging members 18 corresponding to the total number of the expansion / contraction mechanisms 17 is arranged. Here, since the total number of the expansion / contraction mechanisms 17 shows three examples, the total number of the urging members 18 is also three. A locking portion 27 (27a) to which one end of the urging member 18 is fixed is arranged in the first fixing portion 15a corresponding to the chamfered portion (see FIG. 6).
  • a spring for example, a coil spring
  • the second fixing portion 15b is formed to have a size that fits inside the first fixing portion 15a when viewed from the axial direction Da and the sensor portion 13 side, or when viewed from the radial direction Dr (see FIG. 5).
  • the expansion / contraction mechanism 17 described later is most contracted, that is, when the wheel 19 arranged in the parallel leg portion 20 is accommodated in the accommodating groove 25 described later, it is viewed from the axial direction Da and the sensor unit 13 side, or in the radial direction.
  • Ultrasonic waves including all configurations of the telescopic mechanism 17 (parallel leg portion 20, first link 21, second link 22, third link 23, wheel 19), urging member 18, and sensor portion 13 when viewed from Dr.
  • the probe is designed to fit inside the first fixation portion 15a (see FIG. 5).
  • the first fixing portion 15a When the cable 3 is wound by the cable winding device 9 and the tube wall thickness measuring device 1 is recovered from the heat transfer tube 2, the first fixing portion 15a is located at the very beginning of the traveling direction of the tube wall thickness measuring device 1. become. At this time, the first fixing portion 15a serves as a barrier, and the expansion / contraction mechanism 17, the urging member 18, and the like from the floating matter in the heat transfer tube 2 and the welded portion (for example, back wave) protruding from the inner wall of the heat transfer tube 2. And the ultrasonic probe can be protected and these damages can be prevented. That is, the tube wall thickness measuring system 100 can wind the cable 3 by the cable winding device 9 and collect the tube wall thickness measuring device 1 without damage.
  • the first fixing portion 15a is recessed toward the central axis when viewed in the radial direction Dr, corresponding to each position of all the expansion / contraction mechanisms 17, specifically, each position of all the parallel leg portions 20.
  • a plurality of accommodating grooves 25 that are smoothly connected to the outer surface of the second fixing portion 15b are provided in the axial direction Da (see FIGS. 2 and 5).
  • the first fixed portion 15a includes a chamfered portion 26 formed into a curved surface by chamfering the outer peripheral portion and the corner portion of the surface opposite to the second fixed portion 15b in the axial direction Da. (See FIGS. 2, 3, and 6).
  • the chamfering section 26 prevents the pipe wall thickness measuring device 1 from being caught by a back wave or the like protruding inside the heat transfer tube 2 and becoming difficult to move when the pipe wall thickness measuring device 1 is recovered from the heat transfer tube 2. be able to. Therefore, the tube wall thickness measuring system 100 can wind the cable 3 by the cable winding device 9 and collect the tube wall thickness measuring device 1 at high speed. In addition, the resistance that the tube wall thickness measuring device 1 receives from water in the heat transfer tube at the time of recovery is reduced, and stable movement is possible.
  • the first fixing portion 15a is provided with a screw hole 28 (second screw hole) facing the second fixing portion 15b on the surface opposite to the second fixing portion 15b in the axial direction Da.
  • the male screw screw 29 second screw
  • the head of the screw 29 can be seen from the axial direction Da or the radial direction Dr.
  • a part is designed to protrude into the through hole 24a toward the central axis (see FIGS. 3 and 4).
  • the moving portion 16 has the same shape as the second fixed portion 15b.
  • the dimension of the moving portion 16 in the axial direction Da is about 1/3 of that of the second fixed portion 15b.
  • the moving portion 16 includes a columnar through hole 24 (24b) having a central axis coaxial with the central axis of the cylindrical portion 14. Since the diameter of the through hole 24b is substantially the same as the outer diameter of the cylindrical portion 14, the cylindrical portion 14 can be inserted into the through hole 24b. However, unlike the fixed portion 15, the moving portion 16 can easily and smoothly move while contacting the outer peripheral surface of the cylindrical portion 14.
  • the diameter of the through hole 24 is substantially the same as the outer diameter of the cylindrical portion 14, but the diameter of the through hole 24 (24a) of the fixed portion 15 and the diameter of the through hole 24 (24b) of the moving portion 16 are the same. It doesn't have to be.
  • the diameter of the through hole 24b of the moving portion 16 may be designed to be slightly larger than the diameter of the through hole 24a of the fixing portion 15 (for example, about several micrometers ( ⁇ m) larger).
  • a plurality of locking portions 27 (27b) to which the other end of the urging member 18 is fixed are arranged in the moving portion 16 corresponding to the locking portions 27 (27a) of the first fixing portion 15a (FIG. 6). reference).
  • One end of the urging member 18 is connected to and fixed to the locking portion 27a of the first fixing portion 15a, and the other end is connected to and fixed to the locking portion 27b of the moving portion 16 to move with the fixing portion 15.
  • the portions 16 are urged to approach each other.
  • the moving portion 16 includes a screw hole 30 (first screw hole) penetrating in the axial direction Da.
  • the male screw screw 31 first screw
  • the screw 31 is appropriately selected so that the head of the screw 31 does not come into contact with the cylindrical portion 14 (see FIGS. 3 and 5).
  • the screw 31 is selected to be longer than the dimension of the moving portion 16 by a predetermined length in the axial direction Da (see FIG. 3). With this configuration, when the screw 31 is screwed into the screw hole 30, the tip of the screw 31 can be projected from the moving portion 16 toward the second fixing portion 15b.
  • the expansion / contraction mechanism 17 expands most. Therefore, as described above, the tip of the screw 31 is projected from the moving portion 16, and the length of the portion of the screw 31 (hereinafter, referred to as “tip portion”) including the tip and protruding from the moving portion 16 is appropriately adjusted. By doing so, the tip portion functions as a "replacement rod” or a "tension rod” that prevents the moving portion 16 and the fixing portion 15 from approaching each other. As a result, the expansion range of the expansion / contraction mechanism 17 can be narrowed.
  • the pipe wall thickness measuring device 1 and the pipe wall thickness measuring system 100 using the pipe wall thickness measuring device 1 have a large number of heat transfer tubes 2 having different diameters and welded points (for example, back waves) protruding from the inner wall of the heat transfer tubes 2. It is possible to appropriately measure the wall thickness of a longer distance after getting over.
  • the tube wall thickness measuring device 1 includes three expansion / contraction mechanisms 17 arranged at equal intervals in the circumferential direction Dc. However, if they are arranged at equal intervals in the circumferential direction Dc, the tube wall thickness measuring device 1 is provided with three or more (for example, four, five, etc.) expansion / contraction mechanisms 17 according to the specifications. You may.
  • the expansion / contraction mechanism 17 includes a rod-shaped parallel leg portion 20 having wheels 19 arranged at both ends, a rod-shaped and rotatable first link 21 connecting the parallel leg portion 20 and the fixing portion 15, and the first link 21.
  • the length of the parallel leg portion 20 is from the fixed portion 15 to the sensor portion 13 in the axial direction Da in the state where the moving portion 16 is farthest from the fixed portion 15 (the state in which the expansion / contraction mechanism 17 is most contracted) within the possible range. Designed to be about the same length.
  • the shape of both ends of the parallel leg portion 20 is a "U" shape that rotatably sandwiches the wheel 19.
  • the first link 21 and the second link 22 are rotatably fixed to the side surface of the second fixing portion 15b.
  • the fixed locations of the first link 21 and the second link 22 are different locations in the axial direction Da.
  • the first link 21 is arranged so as to be closer to the moving portion 16 and farther than the first fixed portion 15a
  • the second link 22 is arranged to be farther than the moving portion 16 and closer to the first fixed portion 15a. ..
  • the first link 21 and the second link 22 are rotatably fixed to the parallel leg portion 20 so as not to intersect each other.
  • the third link 23 includes a pair of rod-shaped members. One end of these is rotatably fixed to the side surface of the moving portion 16 corresponding to the side surface.
  • each expansion / contraction mechanism 17 is configured, and both ends of the urging member 18 are connected to the locking portion 27a of the first fixing portion 15a and the locking portion 27b of the moving portion 16, respectively. Therefore, the tube wall thickness measuring device 1 can be miniaturized in the axial direction Da (length direction). Therefore, even if the heat transfer tube has a bent portion having a small “bending radius”, the pipe wall thickness measuring device 1 can pass through the bent portion. Therefore, the tube wall thickness measuring device 1 and the tube wall thickness measuring system 100 using the tube wall thickness measuring device 1 have a wall thickness even if the heat transfer tube is bent with a small "bending radius", which is impossible to measure the wall thickness by the conventional technique. Thickness can be measured.
  • the pipe wall thickness measuring device 1 can be housed at the tip of the guide pipe 10. As a result, the pipe wall thickness measuring device 1 can be moved to the position of the heat transfer tube to be measured without any trouble in the pipe gathering 6.
  • the expansion / contraction mechanism 17 operates as follows when the pipe wall thickness measuring device 1 or the pipe wall thickness measuring system 100 performs water immersion UT.
  • the tube wall thickness measuring system 100 the tube wall thickness in a state where the urging member 18 is extended and the moving portion 16 is separated from the fixed portion 15 as much as possible (the state in which the expansion / contraction mechanism 17 shown in FIG. 6 is most contracted).
  • the measuring device 1 is housed in the tip of the guide tube 10.
  • all the parallel leg portions 20 move at the same distance from the axial direction Da and simultaneously in parallel with each other to approach the cylindrical portion 14, and the wheels 19 move into the accommodating groove 25. Is housed in.
  • the tube wall thickness measuring device 1 when the tube wall thickness measuring device 1 is housed at the tip of the guide tube 10, the tube wall thickness measuring device 1 is the smallest when viewed in the radial direction Dr. In other words, each expansion / contraction mechanism 17 is in the most contracted state (see FIGS. 5 and 6).
  • the guide tube 10 containing the tube wall thickness measuring device 1 is inserted from the tube gathering 6, and the tip of the guide tube 10 is aligned with the position of the predetermined heat transfer tube 2. After that, the tube wall thickness measuring device 1 housed at the tip of the guide tube 10 is released, and the tube wall thickness measuring device 1 is dropped into the predetermined heat transfer tube 2.
  • the pipe wall thickness measuring device 1 when the pipe wall thickness measuring device 1 is separated from the tip of the guide pipe 10, the urging member 18 contracts by its own force, and the moving portion 16 approaches the fixed portion 15. Therefore, all the parallel leg portions 20 move at the same distance in the radial direction Dr and at the same time in parallel with each other, and separate from the cylindrical portion 14.
  • the axis is in a state where the moving portion 16 is in contact with the fixing portion 15 by the force of the urging member 18 (or, when the tip portion of the screw 31 is protruding from the moving portion 16, the tip portion is in contact with the fixing portion 15).
  • the tube wall thickness measuring device 1 is the largest when viewed from the direction Da.
  • each of the expansion / contraction mechanisms 17 is in a state of being extended and expanded as much as possible (see FIGS. 2 and 4).
  • the wheels 19 of all the telescopic mechanisms 17 are designed to come into contact with the inner wall of the heat transfer tube 2 (or the length of the tip of the screw 31 is adjusted) so that the telescopic mechanisms 17 are spread as far as possible from each other. Therefore, the sensor unit 13 of the tube wall thickness measuring device 1 is reliably arranged on the central axis of the heat transfer tube 2.
  • the tube wall thickness measuring system 100 pulls out the cable from the cable winding device 9 and setstles the tube wall thickness measuring device 1 to a predetermined position deep inside the heat transfer tube 2 filled with water. After that, the tube wall thickness measuring system 100 activates the sensor unit 13 of the tube wall thickness measuring device 1 and measures the wall thickness of the heat transfer tube 2 while winding the cable 3 at a constant speed by the cable winding device 9.
  • the tube wall thickness measuring device 1 may move from a portion having a large diameter to a portion having a slightly narrow diameter of the heat transfer tube 2 for the convenience of design.
  • the pipe wall thickness measuring system 100 can accurately measure the wall thickness of the heat transfer tube 2 by the pipe wall thickness measuring device 1.
  • the tube wall thickness measuring system 100 when the tube wall thickness measuring system 100 winds up the cable 3 and collects the tube wall thickness measuring device 1, the back wave of the heat transfer tube 2 or the like is affected.
  • the parallel leg portion 20 of the portion When the parallel leg portion 20 of the portion is caught, the force by which the cable 3 is wound and pulled is that the parallel leg portion 20 becomes difficult to move, so that the fixed portion 15, the second link 22, and the third link 23 It is transmitted to the moving portion 16 via the above, and works in the direction of moving the moving portion 16 away from the fixed portion 15. Therefore, when viewed from the axial direction Da, the caught parallel leg 20 moves toward the central axis of the heat transfer tube 2, so that the caught parallel leg 20 can overcome a barrier such as a back wave. Therefore, the tube wall thickness measuring system 100 can reliably collect the tube wall thickness measuring device 1.
  • each expansion / contraction mechanism has a configuration in which the urging member connecting the fixed portion and the moving portion expands to contract, and the urging member contracts to expand. Therefore, the tube wall thickness measuring device can be miniaturized in the length direction of the axis of the central axis of the heat transfer tube. Therefore, it is possible to increase the number of heat transfer tubes that can carry out water immersion UT.
  • the ultrasonic probe can be appropriately arranged on the central axis of the heat transfer tube to accurately carry out the water immersion UT, and the size of the water can be reduced in the length direction of the axis of the central axis of the heat transfer tube. It is possible to provide a tube wall thickness measuring device capable of increasing the number of heat transfer tubes capable of performing immersion UT, and a tube wall thickness measuring system using the device.
  • Tube wall thickness measuring device 2 ... Heat transfer tube 3 ... Cable 4 ... Analytical device 5 ... Display device 6 ... Tube gathering 7 ... Corridor 8 ... Tube stand 9 ... Cable winding device 10 ... Guide tube 11 ... Wire operating device 12 ... Worktable 13 ... Sensor part 14 ... Cylindrical part 15 ... Fixed part (15a ... First fixed part, 15b ... Second fixed part) 16 ... Moving portion 17 ... Telescopic mechanism 18 ... Biasing member 19 ... Wheel 20 ... Parallel leg portion 21 ... First link 22 ... Second link 23 ... Third link 24 (24a, 24b) ... Through hole 25 ... Accommodating groove 26 ... Chamfering portion 27 (27a, 27b) ... Locking portion 28 ...

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  • Health & Medical Sciences (AREA)
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  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
PCT/JP2020/035318 2019-09-26 2020-09-17 管肉厚測定装置及び管肉厚測定システム WO2021060156A1 (ja)

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JPH0616129A (ja) * 1992-04-17 1994-01-25 Masuda Denki Kk 管内移動装置
JP2010271072A (ja) * 2009-05-19 2010-12-02 Naa Fueling Facilities Corp 管厚測定装置
JP2011027506A (ja) * 2009-07-23 2011-02-10 Shin Nippon Hihakai Kensa Kk 配管減肉測定装置及びこれを用いた配管減肉測定方法
JP2012021882A (ja) * 2010-07-14 2012-02-02 Tokyo Energy & Systems Inc 配管減肉測定装置
JP2015169548A (ja) * 2014-03-07 2015-09-28 積水化学工業株式会社 超音波検査装置および超音波検査方法
JP2018138878A (ja) * 2017-02-24 2018-09-06 三菱重工環境・化学エンジニアリング株式会社 管肉厚測定装置

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JP2012021182A (ja) * 2010-07-12 2012-02-02 Sumitomo Electric Ind Ltd マグネシウム合金コイル材及びその製造方法
CN103278114B (zh) * 2013-06-07 2015-12-23 南通友联数码技术开发有限公司 一种超声波管壁测厚装置

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JPH0616129A (ja) * 1992-04-17 1994-01-25 Masuda Denki Kk 管内移動装置
JP2010271072A (ja) * 2009-05-19 2010-12-02 Naa Fueling Facilities Corp 管厚測定装置
JP2011027506A (ja) * 2009-07-23 2011-02-10 Shin Nippon Hihakai Kensa Kk 配管減肉測定装置及びこれを用いた配管減肉測定方法
JP2012021882A (ja) * 2010-07-14 2012-02-02 Tokyo Energy & Systems Inc 配管減肉測定装置
JP2015169548A (ja) * 2014-03-07 2015-09-28 積水化学工業株式会社 超音波検査装置および超音波検査方法
JP2018138878A (ja) * 2017-02-24 2018-09-06 三菱重工環境・化学エンジニアリング株式会社 管肉厚測定装置

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TWI739606B (zh) 2021-09-11
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