WO2021060156A1 - Tube wall thickness measuring device and tube wall thickness measuring system - Google Patents
Tube wall thickness measuring device and tube wall thickness measuring system Download PDFInfo
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- 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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- Prior art keywords
- wall thickness
- thickness measuring
- tube wall
- measuring device
- heat transfer
- Prior art date
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- 230000007246 mechanism Effects 0.000 claims abstract description 59
- 230000008602 contraction Effects 0.000 claims abstract description 47
- 239000000523 sample Substances 0.000 claims abstract description 21
- 238000013459 approach Methods 0.000 claims abstract description 14
- 238000012546 transfer Methods 0.000 claims description 81
- 238000005259 measurement Methods 0.000 claims description 4
- 235000013372 meat Nutrition 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 27
- 238000007654 immersion Methods 0.000 description 16
- 238000004804 winding Methods 0.000 description 10
- 238000005452 bending Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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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
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- 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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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
A tube wall thickness measuring device includes an ultrasonic probe having a cylindrical part, a fixing part that fixes the cylindrical part, a movable moving part, and at least three expansion/contraction mechanisms connected to the fixing part and the moving part, and an urging member that connects the fixing part and the moving part. An expansion/contraction mechanism includes parallel leg parts on which wheels are arranged, rotatable first links and second links that connect the parallel leg parts and the fixing part, and a rotatable third link that connects the second link and the moving part. Where the urging member extends and the moving part separates from the fixing part, all parallel leg parts approach the cylindrical part. Where the urging member contracts and the moving part approaches the fixing part, all parallel leg parts separate from the cylindrical part.
Description
本発明は、ボイラの伝熱管の肉厚測定を行う管肉厚測定装置、及び、当該装置を用いた管肉厚測定システムに関する。
本願は、2019年9月26日に日本に出願された特願2019-175605号について優先権を主張し、その内容をここに援用する。 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.
本願は、2019年9月26日に日本に出願された特願2019-175605号について優先権を主張し、その内容をここに援用する。 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.
火力発電所の石炭炊きボイラ、ごみ焼却炉に備えられた発電用の廃熱ボイラなど、ボイラを備えたプラントでは、超音波を用いて、定期的にボイラの伝熱管(ボイラチューブ)の肉厚測定が行われる。すなわち、非破壊検査の一種である超音波検査(UT:Ultrasonic Testing)が行われる。特に、水を充満した伝熱管の内部に、超音波プローブを挿入する場合は、「水浸UT」と言われる。
In plants equipped with boilers, such as coal-fired boilers for thermal power plants and waste heat boilers for power generation installed in waste incinerators, 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. In particular, when an ultrasonic probe is inserted inside a heat transfer tube filled with water, it is called "water immersion UT".
水浸UTで使用される超音波プローブは、伝熱管の管壁に向かって超音波を発振する。そして、超音波プローブは、当該管壁で反射した超音波を受信する。従って、水浸UTでは、伝熱管の中心軸上に超音波プローブが配置されることで、伝熱管の管壁の肉厚を適切に測定することができる。
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.
そこで、特許文献1及び特許文献2に開示があるように、超音波プローブを伝熱管の中心軸上に配置する伸縮機構を備えた管肉厚測定装置、及び、当該装置を用いた管肉厚測定システムが多数開発されてきた。
Therefore, as disclosed in Patent Document 1 and Patent Document 2, 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.
しかしながら、特許文献1の管肉厚測定装置は、各伸縮機構がそれぞれ完全に独立して動作し、他の伸縮機構の動作と関連を持たない。このため、ある伸縮機構の拡がりと他の伸縮機構の拡がりにズレが生じた場合、超音波プローブが伝熱管の中心軸上に配置されない。その結果として、水浸UTを適切に実施できない可能性がある。
However, in the tube wall thickness measuring device of Patent Document 1, 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.
一方、特許文献2の管肉厚測定装置は、各伸縮機構が互いに接続されている。この装置は、互いに同一の動作をするので、超音波プローブは伝熱管の中心軸上に適切に配置される。
しかしながら、管肉厚測定装置の寸法を鑑みたとき、各伸縮機構の構成上、伝熱管の中心軸の軸線の長さ方向に小型化するのは困難であった。
これは、各伸縮機構が、バネが伸びることで拡大し、当該バネが縮むことで縮小する構成であるからである。このため、伝熱管に「曲げ半径」の小さな屈曲箇所がある場合、特許文献2の管肉厚測定装置は当該屈曲箇所を通過することができない。その結果として、水浸UTを実施可能な伝熱管の数が制限される可能性がある。 On the other hand, in the tube wall thickness measuring device ofPatent Document 2, 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.
However, considering the dimensions of the tube wall thickness measuring device, it is difficult to reduce the size in the length direction of the axis of the central axis of the heat transfer tube due to the configuration of each expansion / contraction mechanism.
This is because each expansion / contraction mechanism expands when the spring expands and contracts when the spring contracts. Therefore, when the heat transfer tube has a bent portion having a small "bending radius", the tube wall thickness measuring device ofPatent Document 2 cannot pass through the bent portion. As a result, the number of heat transfer tubes that can be submerged in water may be limited.
しかしながら、管肉厚測定装置の寸法を鑑みたとき、各伸縮機構の構成上、伝熱管の中心軸の軸線の長さ方向に小型化するのは困難であった。
これは、各伸縮機構が、バネが伸びることで拡大し、当該バネが縮むことで縮小する構成であるからである。このため、伝熱管に「曲げ半径」の小さな屈曲箇所がある場合、特許文献2の管肉厚測定装置は当該屈曲箇所を通過することができない。その結果として、水浸UTを実施可能な伝熱管の数が制限される可能性がある。 On the other hand, in the tube wall thickness measuring device of
However, considering the dimensions of the tube wall thickness measuring device, it is difficult to reduce the size in the length direction of the axis of the central axis of the heat transfer tube due to the configuration of each expansion / contraction mechanism.
This is because each expansion / contraction mechanism expands when the spring expands and contracts when the spring contracts. Therefore, when the heat transfer tube has a bent portion having a small "bending radius", the tube wall thickness measuring device of
本発明は、超音波プローブを伝熱管の中心軸上に適切に配置して正確に水浸UTを実施することができ、且つ、伝熱管の中心軸の軸線の長さ方向に小型化を図り、水浸UTを実施可能な伝熱管の数を増加することが可能な管肉厚測定装置及び当該装置を用いた管肉厚測定システムを提供する。
According to the present invention, 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. Provided are 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.
本発明の管肉厚測定装置は、伝熱管の肉厚を測定する管肉厚測定装置であって、前記伝熱管の管壁に超音波を発振し且つ前記管壁で反射する超音波を受信するセンサ部と、前記センサ部を固定する円筒部とを備えた超音波プローブと、前記円筒部が挿通され、前記円筒部を固定する固定部と、前記円筒部が挿通され、前記固定部に対して移動可能な移動部と、前記円筒部の周方向に等間隔に配置され、前記固定部と前記移動部に接続された少なくとも3つの伸縮機構と、前記周方向で隣り合う2つの前記伸縮機構の間に配置され、前記固定部と前記移動部を接続する付勢部材とを有し、前記伸縮機構は、両端に車輪が配置された棒状の平行脚部と、前記平行脚部と前記固定部とをそれぞれ異なる箇所で接続する棒状かつ回動可能な第一リンク及び第二リンクと、前記第二リンクと前記移動部とを接続する棒状かつ回動可能な第三リンクとを備え、前記付勢部材が伸びて前記移動部が前記固定部から離れることで、全ての前記平行脚部は、前記円筒部の径方向に同じ距離且つ互いに平行に移動して前記円筒部に近づき、前記付勢部材が縮んで前記移動部が前記固定部に近づくことで、全ての前記平行脚部は、前記径方向に同じ距離且つ互いに平行に移動して前記円筒部から離れることを特徴とする。
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. On the other hand, 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. When the urging member extends and the moving portion separates from the fixed portion, all the parallel leg portions move in the same distance in the radial direction of the cylindrical portion and in parallel with each other to approach the cylindrical portion. As the urging member contracts and the moving portion approaches the fixed portion, all the parallel leg portions move in the same radial direction and in parallel with each other and separate from the cylindrical portion.
本発明の管肉厚測定装置によれば、少なくとも3つの伸縮機構が、移動部の移動に伴って、径方向に同じ距離で拡がる。従って、超音波プローブを伝熱管の中心軸上に適切に配置して正確に水浸UTを実施することができる。
また、各伸縮機構は、固定部と移動部を接続する付勢部材が伸びることで縮み、付勢部材が縮むことで拡がる構成である。そのため、管肉厚測定装置を伝熱管の中心軸の軸線の長さ方向に小型化することができる。このため、水浸UTを実施可能な伝熱管の数を増加することが可能となる。
従って、超音波プローブを伝熱管の中心軸上に適切に配置して正確に水浸UTを実施することができ、且つ、伝熱管の中心軸の軸線の長さ方向に小型化を図り、水浸UTを実施可能な伝熱管の数を増加することが可能な管肉厚測定装置及び当該装置を用いた管肉厚測定システムを提供することができる。 According to the tube wall thickness measuring apparatus of the present invention, at least three expansion / contraction mechanisms expand in the radial direction by the same distance as the moving portion moves. Therefore, the ultrasonic probe can be appropriately arranged on the central axis of the heat transfer tube to accurately carry out the water immersion UT.
Further, 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.
Therefore, 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.
また、各伸縮機構は、固定部と移動部を接続する付勢部材が伸びることで縮み、付勢部材が縮むことで拡がる構成である。そのため、管肉厚測定装置を伝熱管の中心軸の軸線の長さ方向に小型化することができる。このため、水浸UTを実施可能な伝熱管の数を増加することが可能となる。
従って、超音波プローブを伝熱管の中心軸上に適切に配置して正確に水浸UTを実施することができ、且つ、伝熱管の中心軸の軸線の長さ方向に小型化を図り、水浸UTを実施可能な伝熱管の数を増加することが可能な管肉厚測定装置及び当該装置を用いた管肉厚測定システムを提供することができる。 According to the tube wall thickness measuring apparatus of the present invention, at least three expansion / contraction mechanisms expand in the radial direction by the same distance as the moving portion moves. Therefore, the ultrasonic probe can be appropriately arranged on the central axis of the heat transfer tube to accurately carry out the water immersion UT.
Further, 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.
Therefore, 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.
以下、本発明の管肉厚測定装置及び当該装置を用いた管肉厚測定システムの実施形態について、図面を参照して説明する。ここでは、まず、図1を用いて管肉厚測定システム100につき説明した後、図2~図6を用いて、管肉厚測定装置1につき詳細に説明する。
Hereinafter, an embodiment of 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. Here, first, 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.
まず、図1を用いて、管肉厚測定システム100につき説明する。
管肉厚測定システム100は、伝熱管2の肉厚を測定するシステムであって、後に詳しく説明する管肉厚測定装置1と、管肉厚測定装置1の円筒部(後述)に一端が接続されたケーブル3と、ケーブル3の他端に接続された分析装置4と、分析装置4が演算した結果を表示する表示装置5とを、少なくとも有する。
分析装置4は、管肉厚測定装置1のセンサ部(後述)が受信した超音波に基づいて伝熱管2の肉厚に関する演算を行う。分析装置4は、当該演算の結果(伝熱管2の肉厚に関する情報)を表示装置5に表示させる。
なお、分析装置4は、コンピュータ等の演算装置である。ここでは、分析装置4とモニタ等の表示装置5を分離して説明するが、例えば、分析装置4と表示装置5が一体化したノート型のパソコン(Personal Computer)でもよい。
また、ケーブル3は、屈曲可能であり、且つ、管肉厚測定装置1のセンサ部(後述)から分析装置4へ電気信号(具体的には、センサ部が受信した超音波に対応する情報)を伝達するケーブルである。
水浸UTの場合、ケーブル3は、管肉厚測定装置1のセンサ部(後述)に水を供給するための水管を内包する。また、伝熱管2の内部は、水で満たされている。 First, the tube wall thickness measuringsystem 100 will be described with reference to FIG.
The tube wallthickness 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.
Theanalyzer 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).
Theanalyzer 4 is an arithmetic unit such as a computer. Here, 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.
Further, thecable 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.
In the case of a water immersion UT, thecable 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.
管肉厚測定システム100は、伝熱管2の肉厚を測定するシステムであって、後に詳しく説明する管肉厚測定装置1と、管肉厚測定装置1の円筒部(後述)に一端が接続されたケーブル3と、ケーブル3の他端に接続された分析装置4と、分析装置4が演算した結果を表示する表示装置5とを、少なくとも有する。
分析装置4は、管肉厚測定装置1のセンサ部(後述)が受信した超音波に基づいて伝熱管2の肉厚に関する演算を行う。分析装置4は、当該演算の結果(伝熱管2の肉厚に関する情報)を表示装置5に表示させる。
なお、分析装置4は、コンピュータ等の演算装置である。ここでは、分析装置4とモニタ等の表示装置5を分離して説明するが、例えば、分析装置4と表示装置5が一体化したノート型のパソコン(Personal Computer)でもよい。
また、ケーブル3は、屈曲可能であり、且つ、管肉厚測定装置1のセンサ部(後述)から分析装置4へ電気信号(具体的には、センサ部が受信した超音波に対応する情報)を伝達するケーブルである。
水浸UTの場合、ケーブル3は、管肉厚測定装置1のセンサ部(後述)に水を供給するための水管を内包する。また、伝熱管2の内部は、水で満たされている。 First, the tube wall thickness measuring
The tube wall
The
The
Further, the
In the case of a water immersion UT, the
では、管肉厚測定システム100が少なくとも有する構成に加え、図1に示すその他の構成について説明する。
火力発電所の石炭炊きボイラ、ごみ焼却炉に備えられた発電用の廃熱ボイラなど、ボイラを備えたプラントにおいては、ボイラは複数の伝熱管2を備える。ボイラが備える複数の伝熱管2は、水平方向に延びる管寄せ6に直交且つ連通して接続される。
管寄せ6は、作業者が作業可能な通路である歩廊7に面した端部に、水平方向に突出した管台8を備える。管台8は、管寄せ6の外径より小さな外径の筒形状をしており、管寄せ6と同軸に配置される。管台8の一端は、管寄せ6に連通して接続されている。管台8の他端は、開口のないように、金属板が溶接されて(またはフランジ構造により)塞がれる。当該他端は、管肉厚測定装置1を管寄せ6の内部に挿入する際に、開口される。
ケーブル巻取装置9は、ケーブル3の自動(または手動)巻取り、また、自動(または手動)引出しが可能である。
ガイド管10は、管寄せ6に接続された所定の伝熱管2まで、管肉厚測定装置1を誘導する装置である。歩廊7に配置されたワイヤ操作装置11とガイド管10の先端はワイヤで接続されている。そして、作業員がワイヤ操作装置11を操作することで、当該先端を管寄せ6の中心軸に対しておよそ90°の向きに曲げることができる。管寄せ6の中心軸と伝熱管2の中心軸は直交しているので、管肉厚測定装置1を所定の伝熱管2に容易に挿入することができる。
なお、ワイヤ操作装置11は、適切な高さの作業台12に配置するとよい。 Then, in addition to the configuration that the tube wall thickness measuringsystem 100 has at least, other configurations shown in FIG. 1 will be described.
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 ofheat 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.
Thepipe 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.
Thecable winding device 9 can automatically (or manually) wind the cable 3 and automatically (or manually) pull it out.
Theguide 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.
Thewire operating device 11 may be arranged on a workbench 12 having an appropriate height.
火力発電所の石炭炊きボイラ、ごみ焼却炉に備えられた発電用の廃熱ボイラなど、ボイラを備えたプラントにおいては、ボイラは複数の伝熱管2を備える。ボイラが備える複数の伝熱管2は、水平方向に延びる管寄せ6に直交且つ連通して接続される。
管寄せ6は、作業者が作業可能な通路である歩廊7に面した端部に、水平方向に突出した管台8を備える。管台8は、管寄せ6の外径より小さな外径の筒形状をしており、管寄せ6と同軸に配置される。管台8の一端は、管寄せ6に連通して接続されている。管台8の他端は、開口のないように、金属板が溶接されて(またはフランジ構造により)塞がれる。当該他端は、管肉厚測定装置1を管寄せ6の内部に挿入する際に、開口される。
ケーブル巻取装置9は、ケーブル3の自動(または手動)巻取り、また、自動(または手動)引出しが可能である。
ガイド管10は、管寄せ6に接続された所定の伝熱管2まで、管肉厚測定装置1を誘導する装置である。歩廊7に配置されたワイヤ操作装置11とガイド管10の先端はワイヤで接続されている。そして、作業員がワイヤ操作装置11を操作することで、当該先端を管寄せ6の中心軸に対しておよそ90°の向きに曲げることができる。管寄せ6の中心軸と伝熱管2の中心軸は直交しているので、管肉厚測定装置1を所定の伝熱管2に容易に挿入することができる。
なお、ワイヤ操作装置11は、適切な高さの作業台12に配置するとよい。 Then, in addition to the configuration that the tube wall thickness measuring
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
The
The
The
The
次に、図2~図6を用いて、管肉厚測定装置1につき詳細に説明する。
まず、管肉厚測定装置1は、次の構成を少なくとも有する。
すなわち、管肉厚測定装置1は、超音波プローブを有している。超音波プローブは、伝熱管2の管壁に超音波を発振し且つ当該管壁で反射する超音波を受信するセンサ部13と、センサ部13を固定する円筒部14とを備えている。
また、管肉厚測定装置1は、固定部15と、移動部16と、少なくとも3つの伸縮機構17と、付勢部材18とを有している。固定部15は、円筒部14が挿通されて円筒部14を固定する。移動部16は、円筒部14が挿通されて固定部15に対して移動可能とされている。伸縮機構17は、円筒部14の周方向に等間隔に配置されて固定部15と移動部16に接続されている。付勢部材18は、当該周方向で隣り合う2つの伸縮機構17の間に配置されて固定部15と移動部16を接続している。
さらに、管肉厚測定装置1において、伸縮機構17は、両端に車輪19が配置された棒状の平行脚部20と、平行脚部20と固定部15とをそれぞれ異なる箇所で接続する棒状かつ回動可能な第一リンク21及び第二リンク22と、第二リンク22と移動部16とを接続する棒状かつ回動可能な第三リンク23とを備えている。
そして、管肉厚測定装置1においては、付勢部材18が伸びて移動部16が固定部15から離れることで、全ての平行脚部20が、円筒部14の径方向に同じ距離且つ互いに平行に移動して円筒部14に近づく。また、付勢部材18が縮んで移動部16が固定部15に近づくことで、全ての平行脚部20が、円筒部14の径方向に同じ距離且つ互いに平行に移動して円筒部14から離れる。 Next, the tube wall thickness measuring device 1 will be described in detail with reference to FIGS. 2 to 6.
First, 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 asensor 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.
Further, the tube wall thickness measuring device 1 includes a fixingportion 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.
Further, in the tube wall thickness measuring device 1, 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.
Then, in the tube wall thickness measuring device 1, all theparallel leg portions 20 are parallel to each other at the same distance in the radial direction of the cylindrical portion 14 by extending the urging member 18 and separating the moving portion 16 from the fixed portion 15. And approaches the cylindrical portion 14. Further, as the urging member 18 contracts and the moving portion 16 approaches the fixed portion 15, all the parallel leg portions 20 move in the same distance in the radial direction of the cylindrical portion 14 and in parallel with each other, and separate from the cylindrical portion 14. ..
まず、管肉厚測定装置1は、次の構成を少なくとも有する。
すなわち、管肉厚測定装置1は、超音波プローブを有している。超音波プローブは、伝熱管2の管壁に超音波を発振し且つ当該管壁で反射する超音波を受信するセンサ部13と、センサ部13を固定する円筒部14とを備えている。
また、管肉厚測定装置1は、固定部15と、移動部16と、少なくとも3つの伸縮機構17と、付勢部材18とを有している。固定部15は、円筒部14が挿通されて円筒部14を固定する。移動部16は、円筒部14が挿通されて固定部15に対して移動可能とされている。伸縮機構17は、円筒部14の周方向に等間隔に配置されて固定部15と移動部16に接続されている。付勢部材18は、当該周方向で隣り合う2つの伸縮機構17の間に配置されて固定部15と移動部16を接続している。
さらに、管肉厚測定装置1において、伸縮機構17は、両端に車輪19が配置された棒状の平行脚部20と、平行脚部20と固定部15とをそれぞれ異なる箇所で接続する棒状かつ回動可能な第一リンク21及び第二リンク22と、第二リンク22と移動部16とを接続する棒状かつ回動可能な第三リンク23とを備えている。
そして、管肉厚測定装置1においては、付勢部材18が伸びて移動部16が固定部15から離れることで、全ての平行脚部20が、円筒部14の径方向に同じ距離且つ互いに平行に移動して円筒部14に近づく。また、付勢部材18が縮んで移動部16が固定部15に近づくことで、全ての平行脚部20が、円筒部14の径方向に同じ距離且つ互いに平行に移動して円筒部14から離れる。 Next, the tube wall thickness measuring device 1 will be described in detail with reference to FIGS. 2 to 6.
First, 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
Further, the tube wall thickness measuring device 1 includes a fixing
Further, in the tube wall thickness measuring device 1, the expansion /
Then, in the tube wall thickness measuring device 1, all the
では、管肉厚測定装置1が少なくとも有する構成に加え、図2~図6に示すその他の構成について説明する。基本的に、超音波プローブ、固定部15、移動部16の順に説明し、最後に、伸縮機構17について説明する。
まず、超音波プローブが備える円筒部14とセンサ部13を、順に説明する。
円筒部14は、金属または樹脂等で成形された円筒形をしている。円筒部14の一端にはセンサ部13が固定されている。円筒部14の他端にはケーブル3が固定される。円筒部14の中心軸は、ケーブル3の中心軸と同軸である。なお、円筒部14は、ケーブル3をその周囲から挟み込んで固定する。従って、円筒部14の当該他端の内径は、ケーブル3の外径と実質的に同一または当該外径よりやや大きく設計される。このため、円筒部14の外径は、ケーブル3の外径より大きい。
センサ部13は、伝熱管2の管壁に向かって、すなわち、伝熱管2の中心軸の軸線方向Daと直交する径方向Drに超音波を発振する。そして、当該管壁で反射した超音波(反射波)を受信する。センサ部13の中心軸は、円筒部14の中心軸と同軸であり、また、伝熱管2の中心軸と同軸である。
なお、センサ部13は、超音波を反射する鏡を備えている。当該鏡は、センサ部13の中心軸から45°傾いて配置される。そして、ケーブル3が内包する水管から水を噴射し、その水圧で当該鏡に連結した水車を回転させることで、当該鏡がセンサ部13の中心軸を回転軸として回転する。このため、センサ部13が当該中心軸上に発信した超音波は、伝熱管2の中心軸周りの全方向の管壁に向かって発振される。また、センサ部13は当該管壁で反射した超音波を当該鏡で受けて受信する。 Then, in addition to the configuration that the tube wall thickness measuring device 1 has at least, other configurations shown in FIGS. 2 to 6 will be described. Basically, the ultrasonic probe, the fixingportion 15, and the moving portion 16 will be described in this order, and finally, the expansion / contraction mechanism 17 will be described.
First, thecylindrical portion 14 and the sensor portion 13 included in the ultrasonic probe will be described in order.
Thecylindrical 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. Therefore, 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.
Thesensor 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.
Thesensor 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.
まず、超音波プローブが備える円筒部14とセンサ部13を、順に説明する。
円筒部14は、金属または樹脂等で成形された円筒形をしている。円筒部14の一端にはセンサ部13が固定されている。円筒部14の他端にはケーブル3が固定される。円筒部14の中心軸は、ケーブル3の中心軸と同軸である。なお、円筒部14は、ケーブル3をその周囲から挟み込んで固定する。従って、円筒部14の当該他端の内径は、ケーブル3の外径と実質的に同一または当該外径よりやや大きく設計される。このため、円筒部14の外径は、ケーブル3の外径より大きい。
センサ部13は、伝熱管2の管壁に向かって、すなわち、伝熱管2の中心軸の軸線方向Daと直交する径方向Drに超音波を発振する。そして、当該管壁で反射した超音波(反射波)を受信する。センサ部13の中心軸は、円筒部14の中心軸と同軸であり、また、伝熱管2の中心軸と同軸である。
なお、センサ部13は、超音波を反射する鏡を備えている。当該鏡は、センサ部13の中心軸から45°傾いて配置される。そして、ケーブル3が内包する水管から水を噴射し、その水圧で当該鏡に連結した水車を回転させることで、当該鏡がセンサ部13の中心軸を回転軸として回転する。このため、センサ部13が当該中心軸上に発信した超音波は、伝熱管2の中心軸周りの全方向の管壁に向かって発振される。また、センサ部13は当該管壁で反射した超音波を当該鏡で受けて受信する。 Then, in addition to the configuration that the tube wall thickness measuring device 1 has at least, other configurations shown in FIGS. 2 to 6 will be described. Basically, the ultrasonic probe, the fixing
First, the
The
The
The
次に、固定部15と移動部16を、順に説明する。
固定部15は、円筒部14の中心軸と同軸の中心軸をもつ円柱状の貫通孔24(24a)を備える(図3参照)。貫通孔24aの直径は、円筒部14の外径と実質的に同一であるため、円筒部14を貫通孔24aに挿入することができる。
ただし、円筒部14は、容易に固定部15から抜けない状態に固定される。図示しないが、例えば、固定部15の径方向から、貫通孔24に挿入された円筒部14に向けて螺子をねじ込み、当該螺子の先端で円筒部14を押さえて、円筒部14が固定部15から抜けないように固定してもよい。もちろん、固定部15に挿入するだけで円筒部14が固定部15から容易に抜けないように設計してもよい。 Next, the fixedportion 15 and the moving portion 16 will be described in order.
The fixingportion 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, thecylindrical 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.
固定部15は、円筒部14の中心軸と同軸の中心軸をもつ円柱状の貫通孔24(24a)を備える(図3参照)。貫通孔24aの直径は、円筒部14の外径と実質的に同一であるため、円筒部14を貫通孔24aに挿入することができる。
ただし、円筒部14は、容易に固定部15から抜けない状態に固定される。図示しないが、例えば、固定部15の径方向から、貫通孔24に挿入された円筒部14に向けて螺子をねじ込み、当該螺子の先端で円筒部14を押さえて、円筒部14が固定部15から抜けないように固定してもよい。もちろん、固定部15に挿入するだけで円筒部14が固定部15から容易に抜けないように設計してもよい。 Next, the fixed
The fixing
However, the
固定部15は、軸線方向(長さ方向)Daに、2つの異なる形状を備えている。板状の第一固定部15aと、角柱状の第二固定部15bの2つである。第一固定部15aは、軸線方向Daかつケーブル3側から見て、あるいは軸線方向Daに垂直な径方向(幅方向)Drで見て、略円形(図4参照)に形成されている。第二固定部15bは、軸線方向Daかつセンサ部13側から見て、あるいは径方向Drで見て伸縮機構17の総数に対応した略正多角形に形成されている。第一固定部15aと第二固定部15bは、別々に形成した後に接続してもよいし、「型」で成型し一度に一体形成してもよい。
第一固定部15aの軸線方向Daの寸法、言い換えれば、上記「板状」部分の厚みは、第二固定部15bの約1/3程度である。
また、ここでは、伸縮機構17の総数は、一例として、3つとして説明するので、第二固定部15bは略正三角柱の形状(図5参照)となる。3つの伸縮機構17は、当該略正三角柱の3つの側面にそれぞれ1つずつ配置される。
ただし、当該略正多角形の各々の角には、バネ(例えば、コイルバネ)またはゴムなどの付勢部材18を配置するための面取りがなされる。従って、伸縮機構17の総数が3つの場合、第二固定部15bはおよそ正三角柱の形状であるものの、面取りまで考慮すれば六角柱の形状であるともいえる(図5参照)。なお、面取りされたそれぞれの箇所に付勢部材18が配置されるので、伸縮機構17の総数に相当する数の付勢部材18が配置される。ここでは、伸縮機構17の総数が3つの例を示すので、付勢部材18の総数も3つとなる。
第一固定部15aには、上記面取りがなされた箇所に対応して、付勢部材18の一端が固定される係止部27(27a)が配置される(図6参照)。 The fixingportion 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 thefirst 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.
Further, since the total number of the expansion /contraction mechanisms 17 will be described here as three as an example, 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.
However, each corner of the substantially regular polygon is chamfered for arranging an urgingmember 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 urgingmember 18 is fixed is arranged in the first fixing portion 15a corresponding to the chamfered portion (see FIG. 6).
第一固定部15aの軸線方向Daの寸法、言い換えれば、上記「板状」部分の厚みは、第二固定部15bの約1/3程度である。
また、ここでは、伸縮機構17の総数は、一例として、3つとして説明するので、第二固定部15bは略正三角柱の形状(図5参照)となる。3つの伸縮機構17は、当該略正三角柱の3つの側面にそれぞれ1つずつ配置される。
ただし、当該略正多角形の各々の角には、バネ(例えば、コイルバネ)またはゴムなどの付勢部材18を配置するための面取りがなされる。従って、伸縮機構17の総数が3つの場合、第二固定部15bはおよそ正三角柱の形状であるものの、面取りまで考慮すれば六角柱の形状であるともいえる(図5参照)。なお、面取りされたそれぞれの箇所に付勢部材18が配置されるので、伸縮機構17の総数に相当する数の付勢部材18が配置される。ここでは、伸縮機構17の総数が3つの例を示すので、付勢部材18の総数も3つとなる。
第一固定部15aには、上記面取りがなされた箇所に対応して、付勢部材18の一端が固定される係止部27(27a)が配置される(図6参照)。 The fixing
The dimension of the axial direction Da of the
Further, since the total number of the expansion /
However, each corner of the substantially regular polygon is chamfered for arranging an urging
A locking portion 27 (27a) to which one end of the urging
軸線方向Daかつセンサ部13側から見て、あるいは径方向Drで見て、第二固定部15bは、第一固定部15aの内側に収まる大きさに形成される(図5参照)。
後述する伸縮機構17が最も縮んだ場合、すなわち、平行脚部20に配置された車輪19が後述する収容溝25に収容された場合、軸線方向Daかつセンサ部13側から見て、あるいは径方向Drで見て、伸縮機構17の全ての構成(平行脚部20、第一リンク21、第二リンク22、第三リンク23、車輪19)、付勢部材18、並びにセンサ部13を含む超音波プローブは、第一固定部15aの内側に収まる大きさに設計される(図5参照)。
ケーブル3がケーブル巻取装置9で巻き取られて管肉厚測定装置1を伝熱管2から回収する際、管肉厚測定装置1の進行方向の最も先頭に第一固定部15aが位置することになる。この時、第一固定部15aが防壁となって、伝熱管2内の浮遊物や伝熱管2の内壁から突出した溶接個所(例えば、裏波)などから、伸縮機構17、付勢部材18、及び超音波プローブを保護し、これらの損傷を防止することができる。すなわち、管肉厚測定システム100は、ケーブル巻取装置9によりケーブル3を巻き取って管肉厚測定装置1を損傷なく回収することができる。 Thesecond 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).
When 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).
When thecable 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.
後述する伸縮機構17が最も縮んだ場合、すなわち、平行脚部20に配置された車輪19が後述する収容溝25に収容された場合、軸線方向Daかつセンサ部13側から見て、あるいは径方向Drで見て、伸縮機構17の全ての構成(平行脚部20、第一リンク21、第二リンク22、第三リンク23、車輪19)、付勢部材18、並びにセンサ部13を含む超音波プローブは、第一固定部15aの内側に収まる大きさに設計される(図5参照)。
ケーブル3がケーブル巻取装置9で巻き取られて管肉厚測定装置1を伝熱管2から回収する際、管肉厚測定装置1の進行方向の最も先頭に第一固定部15aが位置することになる。この時、第一固定部15aが防壁となって、伝熱管2内の浮遊物や伝熱管2の内壁から突出した溶接個所(例えば、裏波)などから、伸縮機構17、付勢部材18、及び超音波プローブを保護し、これらの損傷を防止することができる。すなわち、管肉厚測定システム100は、ケーブル巻取装置9によりケーブル3を巻き取って管肉厚測定装置1を損傷なく回収することができる。 The
When the expansion /
When the
第一固定部15aは、全ての伸縮機構17の各々の位置、具体的には全ての平行脚部20の各々の位置に対応して、径方向Drで見て中心軸に向かって凹み、且つ、軸線方向Daに第二固定部15bの外面に滑らかに接続する複数の収容溝25を備えている(図2、図5参照)。軸線方向Daにおいて移動部16が移動可能な範囲のうち、移動部16が固定部15から最も離れた際、全ての平行脚部20の一方の車輪19が、それぞれ対応する収容溝25に収容される。
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). When the moving portion 16 is farthest from the fixed portion 15 in the range in which the moving portion 16 can move in the axial direction Da, one wheel 19 of all the parallel leg portions 20 is accommodated in the corresponding accommodating groove 25. Wheel.
また、第一固定部15aは、軸線方向Daにおいて、第二固定部15bと反対側の面の外周かつ角の部分に、面取りが施されて曲面に形成された面取部26を備えている(図2、図3、図6参照)。面取部26により、管肉厚測定装置1を伝熱管2から回収する際、管肉厚測定装置1が伝熱管2の内部に突出した裏波などに引っ掛かり、移動困難となることを防止することができる。従って、管肉厚測定システム100は、ケーブル巻取装置9によりケーブル3を巻き取って管肉厚測定装置1を高速に回収することができる。また回収時に、伝熱管内で管肉厚測定装置1が水から受ける抵抗も低減され安定した移動が可能になる。
Further, 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.
さらに、第一固定部15aは、軸線方向Daにおいて、第二固定部15bと反対側の面に、第二固定部15bに向かう螺子孔28(第二の螺子孔)を備えている。螺子孔28に頭部を持つ雄螺子の螺子29(第二の螺子)が螺合且つ固定されることで、軸線方向Daから見て、あるいは径方向Drで見て、螺子29の頭部の一部が中心軸に向かって貫通孔24aにはみ出すよう設計される(図3、図4参照)。
この構成により、管肉厚測定装置1を伝熱管2から回収する際、仮に固定部15の貫通孔24aから円筒部14が抜けそうになっても、螺子29の頭部が円筒部14の一部に確実に引っ掛かる。従って、固定部15の貫通孔24aから円筒部14が抜けるのを防止することができる。そのため、管肉厚測定システム100は、ケーブル巻取装置9によりケーブル3を巻き取って管肉厚測定装置1の全ての構成を確実に回収することができる。 Further, thefirst 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. By screwing and fixing the male screw screw 29 (second screw) having a head in the screw hole 28, 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).
With this configuration, when the tube wall thickness measuring device 1 is recovered from theheat transfer tube 2, even if the cylindrical portion 14 is about to come out from the through hole 24a of the fixing portion 15, the head of the screw 29 is one of the cylindrical portions 14. It will surely get caught in the part. Therefore, it is possible to prevent the cylindrical portion 14 from coming out of the through hole 24a of the fixing portion 15. Therefore, the pipe wall thickness measuring system 100 can surely recover all the configurations of the pipe wall thickness measuring device 1 by winding the cable 3 by the cable winding device 9.
この構成により、管肉厚測定装置1を伝熱管2から回収する際、仮に固定部15の貫通孔24aから円筒部14が抜けそうになっても、螺子29の頭部が円筒部14の一部に確実に引っ掛かる。従って、固定部15の貫通孔24aから円筒部14が抜けるのを防止することができる。そのため、管肉厚測定システム100は、ケーブル巻取装置9によりケーブル3を巻き取って管肉厚測定装置1の全ての構成を確実に回収することができる。 Further, the
With this configuration, when the tube wall thickness measuring device 1 is recovered from the
では、移動部16について、説明する。
移動部16は、第二固定部15bと同様の形状である。移動部16の軸線方向Daの寸法は、第二固定部15bの約1/3程度である。
移動部16は、円筒部14の中心軸と同軸の中心軸をもつ円柱状の貫通孔24(24b)を備える。貫通孔24bの直径は、円筒部14の外径と実質的に同一であるため、円筒部14を貫通孔24bに挿入することができる。
ただし、固定部15と異なり、移動部16は、円筒部14の外周面に接触しながら容易かつ滑らかに移動可能である。すなわち、貫通孔24の直径は、円筒部14の外径と実質的に同一であるが、固定部15の貫通孔24(24a)と移動部16の貫通孔24(24b)の直径は同一である必要はない。移動部16の貫通孔24bの直径は、固定部15の貫通孔24aの直径よりもやや大きく(例えば、数マイクロメートル(μm)程度大きく)設計してもよい。
移動部16には、付勢部材18の他端が固定される係止部27(27b)が、第一固定部15aの係止部27(27a)に対応して複数配置される(図6参照)。
なお、付勢部材18は、その一端が第一固定部15aの係止部27aに接続且つ固定され、その他端が移動部16の係止部27bに接続且つ固定されて、固定部15と移動部16を互いに近づける方向に付勢する。 Then, the movingpart 16 will be described.
The movingportion 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 movingportion 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 fixedportion 15, the moving portion 16 can easily and smoothly move while contacting the outer peripheral surface of the cylindrical portion 14. That is, 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 (μm) larger).
A plurality of locking portions 27 (27b) to which the other end of the urgingmember 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 urgingmember 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.
移動部16は、第二固定部15bと同様の形状である。移動部16の軸線方向Daの寸法は、第二固定部15bの約1/3程度である。
移動部16は、円筒部14の中心軸と同軸の中心軸をもつ円柱状の貫通孔24(24b)を備える。貫通孔24bの直径は、円筒部14の外径と実質的に同一であるため、円筒部14を貫通孔24bに挿入することができる。
ただし、固定部15と異なり、移動部16は、円筒部14の外周面に接触しながら容易かつ滑らかに移動可能である。すなわち、貫通孔24の直径は、円筒部14の外径と実質的に同一であるが、固定部15の貫通孔24(24a)と移動部16の貫通孔24(24b)の直径は同一である必要はない。移動部16の貫通孔24bの直径は、固定部15の貫通孔24aの直径よりもやや大きく(例えば、数マイクロメートル(μm)程度大きく)設計してもよい。
移動部16には、付勢部材18の他端が固定される係止部27(27b)が、第一固定部15aの係止部27(27a)に対応して複数配置される(図6参照)。
なお、付勢部材18は、その一端が第一固定部15aの係止部27aに接続且つ固定され、その他端が移動部16の係止部27bに接続且つ固定されて、固定部15と移動部16を互いに近づける方向に付勢する。 Then, the moving
The moving
The moving
However, unlike the fixed
A plurality of locking portions 27 (27b) to which the other end of the urging
One end of the urging
移動部16は、軸線方向Daに貫通する螺子孔30(第一の螺子孔)を備えている。軸線方向Daにおいて、第二固定部15bと反対側の面から、螺子孔30に雄螺子の螺子31(第一の螺子)が螺合される。螺子孔30に螺子31を螺合した際、螺子31の頭部が円筒部14に接触しないように、螺子31が適切に選定される(図3、図5参照)。また、螺子31は、軸線方向Daにおいて、移動部16の寸法よりも所定長だけ長いものが選定される(図3参照)。
この構成により、螺子孔30に螺子31を螺合した際、螺子31の先端を移動部16から第二固定部15bに向けて突出させることができる。
後述するように、軸線方向Daに移動部16が固定部15に近づくことで、全ての伸縮機構17が伸びて拡がる。管肉厚測定装置1では、移動部16が固定部15に接触する場合に、伸縮機構17が最も拡がる。
従って、上述のように、螺子31の先端を移動部16から突出させ、当該先端を含んで移動部16から出ている螺子31の部分(以下、「先端部」という)の長さを適宜調節することで、当該先端部が、移動部16と固定部15が互いに近づくのを防止する「つっかえ棒」または「突っ張り棒」の機能を果たす。その結果として、伸縮機構17が拡がる範囲を狭めることができる。従って、伝熱管2の内壁直径や伝熱管2の内壁から突出した溶接個所(例えば、裏波)の内側に応じた寸法に、伸縮機構17の拡がる範囲を制限可能である。そのため、管肉厚測定装置1及びこれを用いた管肉厚測定システム100は、直径の異なる多数の伝熱管2の肉厚や伝熱管2の内壁から突出した溶接個所(例えば、裏波)を乗り越えた先のより長い距離の肉厚を適切に測定することができる。 The movingportion 16 includes a screw hole 30 (first screw hole) penetrating in the axial direction Da. In the axial direction Da, the male screw screw 31 (first screw) is screwed into the screw hole 30 from the surface opposite to the second fixing portion 15b. When the screw 31 is screwed into the screw hole 30, 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). Further, 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 thescrew 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.
As will be described later, when the movingportion 16 approaches the fixed portion 15 in the axial direction Da, all the expansion / contraction mechanisms 17 extend and expand. In the tube wall thickness measuring device 1, when the moving portion 16 comes into contact with the fixing portion 15, the expansion / contraction mechanism 17 expands most.
Therefore, as described above, the tip of thescrew 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. Therefore, it is possible to limit the expanding range of the expansion / contraction mechanism 17 to the size corresponding to the diameter of the inner wall of the heat transfer tube 2 and the inside of the welded portion (for example, the back wave) protruding from the inner wall of the heat transfer tube 2. Therefore, 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.
この構成により、螺子孔30に螺子31を螺合した際、螺子31の先端を移動部16から第二固定部15bに向けて突出させることができる。
後述するように、軸線方向Daに移動部16が固定部15に近づくことで、全ての伸縮機構17が伸びて拡がる。管肉厚測定装置1では、移動部16が固定部15に接触する場合に、伸縮機構17が最も拡がる。
従って、上述のように、螺子31の先端を移動部16から突出させ、当該先端を含んで移動部16から出ている螺子31の部分(以下、「先端部」という)の長さを適宜調節することで、当該先端部が、移動部16と固定部15が互いに近づくのを防止する「つっかえ棒」または「突っ張り棒」の機能を果たす。その結果として、伸縮機構17が拡がる範囲を狭めることができる。従って、伝熱管2の内壁直径や伝熱管2の内壁から突出した溶接個所(例えば、裏波)の内側に応じた寸法に、伸縮機構17の拡がる範囲を制限可能である。そのため、管肉厚測定装置1及びこれを用いた管肉厚測定システム100は、直径の異なる多数の伝熱管2の肉厚や伝熱管2の内壁から突出した溶接個所(例えば、裏波)を乗り越えた先のより長い距離の肉厚を適切に測定することができる。 The moving
With this configuration, when the
As will be described later, when the moving
Therefore, as described above, the tip of the
では、最後に、伸縮機構17について、説明する。ここでは、管肉厚測定装置1が、周方向Dcに等間隔に配置された3つの伸縮機構17を備える例を示す。しかし、周方向Dcに等間隔に配置されるのであれば、仕様に応じて、管肉厚測定装置1が3つ以上(例えば、4つ、5つ、などの複数)の伸縮機構17を備えてもよい。
伸縮機構17は、両端に車輪19が配置された棒状の平行脚部20と、平行脚部20と固定部15とを接続する棒状かつ回動可能な第一リンク21と、第一リンク21と異なる箇所で平行脚部20と固定部15とを接続する棒状かつ回動可能な第二リンク22と、第二リンク22と移動部16とを接続する棒状かつ回動可能な第三リンク23を備えている。
平行脚部20の長さは、可能な範囲で移動部16を固定部15から最も離した状態(伸縮機構17を最も縮めた状態)において、軸線方向Daにおける固定部15からセンサ部13までの長さとほぼ同一に設計される。平行脚部20の両端の形状は、車輪19を回転可能に挟み込む「コ」の字状の形状である。
第一リンク21と第二リンク22は、第二固定部15bの上記側面に回動可能に固定される。ただし、第一リンク21と第二リンク22の固定箇所は、軸線方向Daにおいてそれぞれ異なる箇所である。これら2箇所を比べた場合、第一リンク21は移動部16に近く且つ第一固定部15aより遠く、第二リンク22は移動部16より遠く且つ第一固定部15aに近くなるよう配置される。
また、第一リンク21と第二リンク22は、互いに交差しないように、平行脚部20に回動可能に固定される。
第三リンク23は、一対の棒状の部材を備える。これらの一端が上記側面に対応する移動部16の側面に回動可能に固定される。また、これらの他端は、第二リンク22が第二固定部15bに固定された箇所から少し離れた箇所(第二リンク22の中間付近)で第二リンクを挟み、回動可能に第二リンクに固定される。なお、これら一対の棒状の部材は、第一リンク21の両脇に配置されるが、第一リンク21に接触しないよう設計される。 Finally, the expansion /contraction mechanism 17 will be described. Here, an example is shown in which 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. A rod-shaped and rotatable second link 22 that connects the parallel leg portion 20 and the fixing portion 15 at different locations, and a rod-shaped and rotatable third link 23 that connects the second link 22 and the moving portion 16. I have.
The length of theparallel 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.
Thefirst link 21 and the second link 22 are rotatably fixed to the side surface of the second fixing portion 15b. However, the fixed locations of the first link 21 and the second link 22 are different locations in the axial direction Da. When comparing these two locations, the first link 21 is arranged so as to be closer to the moving portion 16 and farther than the first fixed portion 15a, and the second link 22 is arranged to be farther than the moving portion 16 and closer to the first fixed portion 15a. ..
Further, thefirst link 21 and the second link 22 are rotatably fixed to the parallel leg portion 20 so as not to intersect each other.
Thethird 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. Further, the other ends of these are rotatably second by sandwiching the second link at a position slightly separated from the position where the second link 22 is fixed to the second fixing portion 15b (near the middle of the second link 22). Fixed to the link. Although these pair of rod-shaped members are arranged on both sides of the first link 21, they are designed so as not to come into contact with the first link 21.
伸縮機構17は、両端に車輪19が配置された棒状の平行脚部20と、平行脚部20と固定部15とを接続する棒状かつ回動可能な第一リンク21と、第一リンク21と異なる箇所で平行脚部20と固定部15とを接続する棒状かつ回動可能な第二リンク22と、第二リンク22と移動部16とを接続する棒状かつ回動可能な第三リンク23を備えている。
平行脚部20の長さは、可能な範囲で移動部16を固定部15から最も離した状態(伸縮機構17を最も縮めた状態)において、軸線方向Daにおける固定部15からセンサ部13までの長さとほぼ同一に設計される。平行脚部20の両端の形状は、車輪19を回転可能に挟み込む「コ」の字状の形状である。
第一リンク21と第二リンク22は、第二固定部15bの上記側面に回動可能に固定される。ただし、第一リンク21と第二リンク22の固定箇所は、軸線方向Daにおいてそれぞれ異なる箇所である。これら2箇所を比べた場合、第一リンク21は移動部16に近く且つ第一固定部15aより遠く、第二リンク22は移動部16より遠く且つ第一固定部15aに近くなるよう配置される。
また、第一リンク21と第二リンク22は、互いに交差しないように、平行脚部20に回動可能に固定される。
第三リンク23は、一対の棒状の部材を備える。これらの一端が上記側面に対応する移動部16の側面に回動可能に固定される。また、これらの他端は、第二リンク22が第二固定部15bに固定された箇所から少し離れた箇所(第二リンク22の中間付近)で第二リンクを挟み、回動可能に第二リンクに固定される。なお、これら一対の棒状の部材は、第一リンク21の両脇に配置されるが、第一リンク21に接触しないよう設計される。 Finally, the expansion /
The expansion /
The length of the
The
Further, the
The
以上のように各伸縮機構17が構成されており、また、第一固定部15aの係止部27aと移動部16の係止部27bに付勢部材18の両端がそれぞれ接続される。そのため、管肉厚測定装置1を軸線方向Da(長さ方向)に小型化できた。
従って、伝熱管に小さい「曲げ半径」の屈曲箇所がある場合でも、管肉厚測定装置1は当該屈曲箇所を通過することができる。このため、管肉厚測定装置1及びこれを用いた管肉厚測定システム100は、従来の技術では肉厚計測が不可能であった小さな「曲げ半径」で屈曲した伝熱管であっても肉厚測定可能である。そのため、肉厚測定の対象となる伝熱管の数を増加させることができる。
また、この小型化により、ガイド管10の先端に管肉厚測定装置1を収納することができる。その結果、管寄せ6内で管肉厚測定装置1を不具合なく測定対象の伝熱管の位置まで移動させることができる。 As described above, 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 wallthickness 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. Therefore, the number of heat transfer tubes to be measured for wall thickness can be increased.
Further, due to this miniaturization, the pipe wall thickness measuring device 1 can be housed at the tip of theguide 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.
従って、伝熱管に小さい「曲げ半径」の屈曲箇所がある場合でも、管肉厚測定装置1は当該屈曲箇所を通過することができる。このため、管肉厚測定装置1及びこれを用いた管肉厚測定システム100は、従来の技術では肉厚計測が不可能であった小さな「曲げ半径」で屈曲した伝熱管であっても肉厚測定可能である。そのため、肉厚測定の対象となる伝熱管の数を増加させることができる。
また、この小型化により、ガイド管10の先端に管肉厚測定装置1を収納することができる。その結果、管寄せ6内で管肉厚測定装置1を不具合なく測定対象の伝熱管の位置まで移動させることができる。 As described above, each expansion /
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
Further, due to this miniaturization, the pipe wall thickness measuring device 1 can be housed at the tip of the
また、伸縮機構17は、管肉厚測定装置1または管肉厚測定システム100が水浸UTを行う際、次のように動作する。
まず、管肉厚測定システム100では、付勢部材18を伸ばし、可能な範囲で移動部16を固定部15から離した状態(図6に示す伸縮機構17を最も縮めた状態)の管肉厚測定装置1が、ガイド管10の先端に収納される。
この時、付勢部材18が伸ばされると、全ての平行脚部20は、軸線方向Daから見て同じ距離、且つ、互いに平行に同時に移動して円筒部14に近づき、車輪19が収容溝25に収容される。すなわち、ガイド管10の先端に管肉厚測定装置1が収納された状態が、径方向Drで見て管肉厚測定装置1が最も小さくなる。言い換えれば、各々の伸縮機構17が最も縮んだ状態である(図5、図6参照)。
次に、管肉厚測定システム100では、管肉厚測定装置1を収納したガイド管10を管寄せ6から挿入し、ガイド管10の先端を所定の伝熱管2の位置に合わせる。その後、ガイド管10の先端に収納した管肉厚測定装置1を放し、管肉厚測定装置1を所定の伝熱管2の内部に投下する。
この時、ガイド管10の先端から管肉厚測定装置1が離れると、付勢部材18は自らの力で縮み、移動部16が固定部15に近づく。従って、全ての平行脚部20が、径方向Drで見て同じ距離、且つ、互いに平行に同時に移動して、円筒部14から離れる。付勢部材18の力で、移動部16が固定部15に接触(または、螺子31の先端部が移動部16から出ている場合は当該先端部が固定部15に接触)した状態が、軸線方向Daから見て管肉厚測定装置1が最も大きくなる。すなわち、各々の伸縮機構17が互いに可能な限り最も伸びて拡がった状態である(図2、図4参照)。伸縮機構17が互いに可能な限り最も広がった状態で、全ての伸縮機構17の車輪19が伝熱管2の内壁に接触するよう設計(または、螺子31の先端部の長さが調節)される。そのため、管肉厚測定装置1のセンサ部13は伝熱管2の中心軸上に確実に配置される。 Further, 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.
First, in the tube wallthickness 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.
At this time, when the urgingmember 18 is extended, 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. That is, 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).
Next, in the tube wallthickness measuring system 100, 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.
At this time, when the pipe wall thickness measuring device 1 is separated from the tip of theguide 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. That is, 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.
まず、管肉厚測定システム100では、付勢部材18を伸ばし、可能な範囲で移動部16を固定部15から離した状態(図6に示す伸縮機構17を最も縮めた状態)の管肉厚測定装置1が、ガイド管10の先端に収納される。
この時、付勢部材18が伸ばされると、全ての平行脚部20は、軸線方向Daから見て同じ距離、且つ、互いに平行に同時に移動して円筒部14に近づき、車輪19が収容溝25に収容される。すなわち、ガイド管10の先端に管肉厚測定装置1が収納された状態が、径方向Drで見て管肉厚測定装置1が最も小さくなる。言い換えれば、各々の伸縮機構17が最も縮んだ状態である(図5、図6参照)。
次に、管肉厚測定システム100では、管肉厚測定装置1を収納したガイド管10を管寄せ6から挿入し、ガイド管10の先端を所定の伝熱管2の位置に合わせる。その後、ガイド管10の先端に収納した管肉厚測定装置1を放し、管肉厚測定装置1を所定の伝熱管2の内部に投下する。
この時、ガイド管10の先端から管肉厚測定装置1が離れると、付勢部材18は自らの力で縮み、移動部16が固定部15に近づく。従って、全ての平行脚部20が、径方向Drで見て同じ距離、且つ、互いに平行に同時に移動して、円筒部14から離れる。付勢部材18の力で、移動部16が固定部15に接触(または、螺子31の先端部が移動部16から出ている場合は当該先端部が固定部15に接触)した状態が、軸線方向Daから見て管肉厚測定装置1が最も大きくなる。すなわち、各々の伸縮機構17が互いに可能な限り最も伸びて拡がった状態である(図2、図4参照)。伸縮機構17が互いに可能な限り最も広がった状態で、全ての伸縮機構17の車輪19が伝熱管2の内壁に接触するよう設計(または、螺子31の先端部の長さが調節)される。そのため、管肉厚測定装置1のセンサ部13は伝熱管2の中心軸上に確実に配置される。 Further, the expansion /
First, in the tube wall
At this time, when the urging
Next, in the tube wall
At this time, when the pipe wall thickness measuring device 1 is separated from the tip of the
その後、管肉厚測定システム100は、ケーブル巻取装置9からケーブルを引き出して、水で満たされた伝熱管2の奥深くの所定位置まで管肉厚測定装置1を沈降させる。
その後、管肉厚測定システム100は、管肉厚測定装置1のセンサ部13を起動し、ケーブル巻取装置9によりケーブル3を一定速度で巻き取りつつ、伝熱管2の肉厚を測定する。
管肉厚測定システム100が伝熱管2の肉厚を測定する際、設計の都合上、管肉厚測定装置1が、伝熱管2の直径が広い箇所からやや狭い箇所に移動する場合がある。この場合においても、管肉厚測定装置1の全ての伸縮機構17は、互いに連動かつ同期して同じように縮まりながら伝熱管2の内壁に接触する。そのため、センサ部13は、伝熱管2の中心軸上に正確に配置される。
以上のように、伝熱管2の肉厚を測定する際、管肉厚測定装置1は、センサ部13を伝熱管2の中心軸上から逸脱させず、当該中心軸上に適切に配置する。従って、管肉厚測定システム100は、管肉厚測定装置1によって正確に伝熱管2の肉厚を計測することができる。 After that, the tube wallthickness 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 wallthickness 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.
When the tube wallthickness measuring system 100 measures the wall thickness of the heat transfer tube 2, 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. Even in this case, all the expansion / contraction mechanisms 17 of the tube wall thickness measuring device 1 come into contact with the inner wall of the heat transfer tube 2 while interlocking with each other and synchronizing with each other and contracting in the same manner. Therefore, the sensor unit 13 is accurately arranged on the central axis of the heat transfer tube 2.
As described above, when measuring the wall thickness of theheat transfer tube 2, the tube wall thickness measuring device 1 does not deviate from the central axis of the heat transfer tube 2 and appropriately arranges the sensor unit 13 on the central axis. Therefore, 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.
その後、管肉厚測定システム100は、管肉厚測定装置1のセンサ部13を起動し、ケーブル巻取装置9によりケーブル3を一定速度で巻き取りつつ、伝熱管2の肉厚を測定する。
管肉厚測定システム100が伝熱管2の肉厚を測定する際、設計の都合上、管肉厚測定装置1が、伝熱管2の直径が広い箇所からやや狭い箇所に移動する場合がある。この場合においても、管肉厚測定装置1の全ての伸縮機構17は、互いに連動かつ同期して同じように縮まりながら伝熱管2の内壁に接触する。そのため、センサ部13は、伝熱管2の中心軸上に正確に配置される。
以上のように、伝熱管2の肉厚を測定する際、管肉厚測定装置1は、センサ部13を伝熱管2の中心軸上から逸脱させず、当該中心軸上に適切に配置する。従って、管肉厚測定システム100は、管肉厚測定装置1によって正確に伝熱管2の肉厚を計測することができる。 After that, the tube wall
After that, the tube wall
When the tube wall
As described above, when measuring the wall thickness of the
また、上述した管肉厚測定装置1の構成によれば、管肉厚測定システム100がケーブル3を巻き取って管肉厚測定装置1を回収する際、伝熱管2の裏波などに、一部の平行脚部20が引っ掛かった場合、ケーブル3が巻き取られて引っ張られる力は、当該平行脚部20が移動困難となったことで、固定部15、第二リンク22、第三リンク23を介して移動部16に伝達され、移動部16を固定部15から遠ざける方向に働く。このため、軸線方向Daから見て、当該引っ掛かった平行脚部20は伝熱管2の中心軸に向かって移動するので、当該引っ掛かった平行脚部20は裏波などの障壁を乗り越えることができる。
従って、管肉厚測定システム100は、管肉厚測定装置1を確実に回収することができる。 Further, according to the configuration of the tube wall thickness measuring device 1 described above, when the tube wallthickness 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. 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 wallthickness measuring system 100 can reliably collect the tube wall thickness measuring device 1.
従って、管肉厚測定システム100は、管肉厚測定装置1を確実に回収することができる。 Further, according to the configuration of the tube wall thickness measuring device 1 described above, when the tube wall
Therefore, the tube wall
以上、本発明の実施形態について詳述したが、本発明の技術範囲は実施形態に限られるものではなく、本発明の要旨を逸脱しない範囲の設計変更等も含まれる。
Although the embodiments of the present invention have been described in detail above, the technical scope of the present invention is not limited to the embodiments, and includes design changes and the like within a range that does not deviate from the gist of the present invention.
本発明の管肉厚測定装置によれば、少なくとも3つの伸縮機構が、移動部の移動に伴って、径方向に同じ距離で拡がる。従って、超音波プローブを伝熱管の中心軸上に適切に配置して正確に水浸UTを実施することができる。
また、各伸縮機構は、固定部と移動部を接続する付勢部材が伸びることで縮み、付勢部材が縮むことで拡がる構成である。そのため、管肉厚測定装置を伝熱管の中心軸の軸線の長さ方向に小型化することができる。このため、水浸UTを実施可能な伝熱管の数を増加することが可能となる。
従って、超音波プローブを伝熱管の中心軸上に適切に配置して正確に水浸UTを実施することができ、且つ、伝熱管の中心軸の軸線の長さ方向に小型化を図り、水浸UTを実施可能な伝熱管の数を増加することが可能な管肉厚測定装置及び当該装置を用いた管肉厚測定システムを提供することができる。 According to the tube wall thickness measuring apparatus of the present invention, at least three expansion / contraction mechanisms expand in the radial direction by the same distance as the moving portion moves. Therefore, the ultrasonic probe can be appropriately arranged on the central axis of the heat transfer tube to accurately carry out the water immersion UT.
Further, 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.
Therefore, 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.
また、各伸縮機構は、固定部と移動部を接続する付勢部材が伸びることで縮み、付勢部材が縮むことで拡がる構成である。そのため、管肉厚測定装置を伝熱管の中心軸の軸線の長さ方向に小型化することができる。このため、水浸UTを実施可能な伝熱管の数を増加することが可能となる。
従って、超音波プローブを伝熱管の中心軸上に適切に配置して正確に水浸UTを実施することができ、且つ、伝熱管の中心軸の軸線の長さ方向に小型化を図り、水浸UTを実施可能な伝熱管の数を増加することが可能な管肉厚測定装置及び当該装置を用いた管肉厚測定システムを提供することができる。 According to the tube wall thickness measuring apparatus of the present invention, at least three expansion / contraction mechanisms expand in the radial direction by the same distance as the moving portion moves. Therefore, the ultrasonic probe can be appropriately arranged on the central axis of the heat transfer tube to accurately carry out the water immersion UT.
Further, 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.
Therefore, 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.
1…管肉厚測定装置
2…伝熱管
3…ケーブル
4…分析装置
5…表示装置
6…管寄せ
7…歩廊
8…管台
9…ケーブル巻取装置
10…ガイド管
11…ワイヤ操作装置
12…作業台
13…センサ部
14…円筒部
15…固定部(15a…第一固定部、15b…第二固定部)
16…移動部
17…伸縮機構
18…付勢部材
19…車輪
20…平行脚部
21…第一リンク
22…第二リンク
23…第三リンク
24(24a、24b)…貫通孔
25…収容溝
26…面取部
27(27a、27b)…係止部
28…螺子孔(第二の螺子孔)
29…螺子(第二の螺子)
30…螺子孔(第一の螺子孔)
31…螺子(第一の螺子)
100…管肉厚測定システム
Da…軸線方向(伝熱管2の中心軸の方向)
Dc…周方向(伝熱管2の中心軸に垂直な断面において、中心軸周りの方向)
Dr…径方向(伝熱管2の中心軸に垂直な方向) 1 ... Tube wallthickness 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 ... Movingportion 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 ... Screw hole (second screw hole)
29 ... Screw (second screw)
30 ... Screw hole (first screw hole)
31 ... Screw (first screw)
100 ... Tube wall thickness measurement system Da ... Axial direction (direction of the central axis of the heat transfer tube 2)
Dc ... Circumferential direction (direction around the central axis in the cross section perpendicular to the central axis of the heat transfer tube 2)
Dr ... Radial direction (direction perpendicular to the central axis of the heat transfer tube 2)
2…伝熱管
3…ケーブル
4…分析装置
5…表示装置
6…管寄せ
7…歩廊
8…管台
9…ケーブル巻取装置
10…ガイド管
11…ワイヤ操作装置
12…作業台
13…センサ部
14…円筒部
15…固定部(15a…第一固定部、15b…第二固定部)
16…移動部
17…伸縮機構
18…付勢部材
19…車輪
20…平行脚部
21…第一リンク
22…第二リンク
23…第三リンク
24(24a、24b)…貫通孔
25…収容溝
26…面取部
27(27a、27b)…係止部
28…螺子孔(第二の螺子孔)
29…螺子(第二の螺子)
30…螺子孔(第一の螺子孔)
31…螺子(第一の螺子)
100…管肉厚測定システム
Da…軸線方向(伝熱管2の中心軸の方向)
Dc…周方向(伝熱管2の中心軸に垂直な断面において、中心軸周りの方向)
Dr…径方向(伝熱管2の中心軸に垂直な方向) 1 ... Tube wall
16 ... Moving
29 ... Screw (second screw)
30 ... Screw hole (first screw hole)
31 ... Screw (first screw)
100 ... Tube wall thickness measurement system Da ... Axial direction (direction of the central axis of the heat transfer tube 2)
Dc ... Circumferential direction (direction around the central axis in the cross section perpendicular to the central axis of the heat transfer tube 2)
Dr ... Radial direction (direction perpendicular to the central axis of the heat transfer tube 2)
Claims (6)
- 伝熱管の肉厚を測定する管肉厚測定装置であって、
前記伝熱管の管壁に超音波を発振し且つ前記管壁で反射する超音波を受信するセンサ部と、前記センサ部を固定する円筒部とを備えた超音波プローブと、
前記円筒部が挿通され、前記円筒部を固定する固定部と、
前記円筒部が挿通され、前記固定部に対して移動可能な移動部と、
前記円筒部の周方向に等間隔に配置され、前記固定部と前記移動部に接続された少なくとも3つの伸縮機構と、
前記周方向で隣り合う2つの前記伸縮機構の間に配置され、前記固定部と前記移動部を接続する付勢部材と
を有し、
前記伸縮機構は、
両端に車輪が配置された棒状の平行脚部と、
前記平行脚部と前記固定部とをそれぞれ異なる箇所で接続する棒状かつ回動可能な第一リンク及び第二リンクと、
前記第二リンクと前記移動部とを接続する棒状かつ回動可能な第三リンクと
を備え、
前記付勢部材が伸びて前記移動部が前記固定部から離れることで、全ての前記平行脚部は、前記円筒部の径方向に同じ距離且つ互いに平行に移動して前記円筒部に近づき、
前記付勢部材が縮んで前記移動部が前記固定部に近づくことで、全ての前記平行脚部は、前記径方向に同じ距離且つ互いに平行に移動して前記円筒部から離れること
を特徴とする管肉厚測定装置。 A tube wall thickness measuring device that measures the wall thickness of heat transfer tubes.
An ultrasonic probe including a sensor unit that oscillates ultrasonic waves on the tube wall of the heat transfer tube and receives ultrasonic waves reflected by the tube wall, and a cylindrical portion that fixes the sensor unit.
A fixing portion through which the cylindrical portion is inserted and fixing the cylindrical portion,
A moving portion through which the cylindrical portion is inserted and movable with respect to the fixed portion,
At least three telescopic mechanisms arranged at equal intervals in the circumferential direction of the cylindrical portion and connected to the fixed portion and the moving portion, and
It is arranged between the two telescopic mechanisms adjacent to each other in the circumferential direction, and has an urging member for connecting the fixed portion and the moving portion.
The expansion and contraction mechanism
Rod-shaped parallel legs with wheels on both ends,
Rod-shaped and rotatable first and second links that connect the parallel legs and the fixed parts at different locations,
A rod-shaped and rotatable third link that connects the second link and the moving portion is provided.
When the urging member extends and the moving portion separates from the fixed portion, all the parallel legs move in the same distance in the radial direction of the cylindrical portion and in parallel with each other to approach the cylindrical portion.
When the urging member contracts and the moving portion approaches the fixed portion, all the parallel leg portions move in the same radial direction and in parallel with each other and separate from the cylindrical portion. Tube wall thickness measuring device. - 第一の螺子をさらに有し、
前記移動部は、前記円筒部が挿通される方向に貫通し、且つ、前記第一の螺子に螺合する第一の螺子孔を備え、
前記第一の螺子の先端を前記第一の螺子孔から前記移動部と前記固定部の間に突出させることで、前記付勢部材が縮んで前記移動部が前記固定部に近づく際、前記移動部は、前記先端で止まり、前記平行脚部が前記円筒部から離れる範囲は狭まること
を特徴とする請求項1に記載の管肉厚測定装置。 Has an additional first screw,
The moving portion includes a first screw hole that penetrates in the direction in which the cylindrical portion is inserted and is screwed into the first screw.
By projecting the tip of the first screw from the first screw hole between the moving portion and the fixing portion, the urging member contracts and the moving portion approaches the fixing portion. The tube wall thickness measuring device according to claim 1, wherein the portion stops at the tip thereof, and the range in which the parallel leg portion is separated from the cylindrical portion is narrowed. - 第二の螺子をさらに有し、
前記固定部は、前記移動部に対向する面と反対側の面から、前記円筒部が挿通される方向に、前記第二の螺子に螺合する第二の螺子孔を備え、
前記第二の螺子の頭部が前記円筒部の一部を引掛けること
を特徴とする請求項2に記載の管肉厚測定装置。 Has a second screw,
The fixing portion includes a second screw hole that is screwed into the second screw in a direction in which the cylindrical portion is inserted from a surface opposite to the surface facing the moving portion.
The tube wall thickness measuring device according to claim 2, wherein the head of the second screw hooks a part of the cylindrical portion. - 前記付勢部材は、バネまたはゴムであって、前記移動部と前記固定部が近づくように付勢すること
を特徴とする請求項1から請求項3のいずれか一項に記載の管肉厚測定装置。 The pipe wall thickness according to any one of claims 1 to 3, wherein the urging member is a spring or rubber and urges the moving portion and the fixing portion so as to approach each other. measuring device. - 前記固定部は、全ての前記平行脚部の各々の位置に対応して前記径方向に凹んだ複数の収容溝をさらに備え、
前記付勢部材が伸びて前記移動部が前記固定部から離れることで、全ての前記平行脚部が各々に対応する前記収容溝に収容されること
を特徴とする請求項4に記載の管肉厚測定装置。 The fixing portion further comprises a plurality of accommodating grooves recessed in the radial direction corresponding to each position of all the parallel legs.
The tube meat according to claim 4, wherein all the parallel legs are accommodated in the corresponding accommodating grooves by extending the urging member and separating the moving portion from the fixing portion. Thickness measuring device. - 伝熱管の肉厚を測定する管肉厚測定システムであって、
請求項1から請求項5のいずれか一項に記載の管肉厚測定装置と、
一端が前記円筒部に接続されたケーブルと、
前記ケーブルの他端に接続された分析装置と、
前記分析装置が演算した結果を表示する表示装置と
を有し、
前記分析装置は、前記センサ部が受信した超音波に基づいて前記演算を行い、前記結果である前記伝熱管の肉厚に関する情報を前記表示装置に表示させること
を特徴とする管肉厚測定システム。
A tube wall thickness measurement system that measures the wall thickness of heat transfer tubes.
The tube wall thickness measuring device according to any one of claims 1 to 5.
A cable whose one end is connected to the cylindrical portion,
An analyzer connected to the other end of the cable and
It has a display device that displays the result of calculation by the analyzer.
The analyzer is characterized in that the calculation is performed based on the ultrasonic waves received by the sensor unit, and the information regarding the wall thickness of the heat transfer tube, which is the result, is displayed on the display device. ..
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0616129A (en) * | 1992-04-17 | 1994-01-25 | Masuda Denki Kk | Inside-pipe moving device |
JP2010271072A (en) * | 2009-05-19 | 2010-12-02 | Naa Fueling Facilities Corp | Pipe thickness measuring device |
JP2011027506A (en) * | 2009-07-23 | 2011-02-10 | Shin Nippon Hihakai Kensa Kk | Piping thickness reduction measuring apparatus and piping thickness reduction measuring method using the same |
JP2012021882A (en) * | 2010-07-14 | 2012-02-02 | Tokyo Energy & Systems Inc | Pipe wall thinning measuring apparatus |
JP2015169548A (en) * | 2014-03-07 | 2015-09-28 | 積水化学工業株式会社 | Ultrasonic inspection device and ultrasonic inspection method |
JP2018138878A (en) * | 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 | Pipe wall thickness measuring apparatus |
Family Cites Families (2)
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JP2012021182A (en) * | 2010-07-12 | 2012-02-02 | Sumitomo Electric Ind Ltd | Magnesium alloy coil material and method for manufacturing the same |
CN103278114B (en) * | 2013-06-07 | 2015-12-23 | 南通友联数码技术开发有限公司 | A kind of ultrasound wave Pipe thickness measurement device |
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0616129A (en) * | 1992-04-17 | 1994-01-25 | Masuda Denki Kk | Inside-pipe moving device |
JP2010271072A (en) * | 2009-05-19 | 2010-12-02 | Naa Fueling Facilities Corp | Pipe thickness measuring device |
JP2011027506A (en) * | 2009-07-23 | 2011-02-10 | Shin Nippon Hihakai Kensa Kk | Piping thickness reduction measuring apparatus and piping thickness reduction measuring method using the same |
JP2012021882A (en) * | 2010-07-14 | 2012-02-02 | Tokyo Energy & Systems Inc | Pipe wall thinning measuring apparatus |
JP2015169548A (en) * | 2014-03-07 | 2015-09-28 | 積水化学工業株式会社 | Ultrasonic inspection device and ultrasonic inspection method |
JP2018138878A (en) * | 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 | Pipe wall thickness measuring apparatus |
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CN114424021B (en) | 2022-08-12 |
TW202117280A (en) | 2021-05-01 |
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CN114424021A (en) | 2022-04-29 |
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