JP5973531B2 - Measuring device, measuring method - Google Patents

Description

  The present invention relates to a measuring apparatus and a measuring method.

  The boiler of a thermal power plant has an infinite number of thin pipes (for example, 50 mm in diameter) that circulate steam, such as superheater and reheater heat transfer tubes, and pipes for sending steam heated by these to the turbine. ing. These pipes are subjected to high-temperature and high-pressure (for example, 600 ° C., 20 MPa) steam and the like, and are placed in a high-temperature environment, so that creep damage is likely to occur. On the other hand, when these pipes are broken due to creep damage, a serious accident is caused. Therefore, a periodic remaining life inspection is performed, and replacement and repair are performed according to the remaining life. Against this background, various examinations have been made on the remaining life inspection of these pipes. For example, Patent Document 1 describes a method for predicting the remaining life according to the use environment of the pipes. .

JP-A-6-331622

  However, although Patent Document 1 describes a method of calculating a predicted value of the remaining life of a pipe by using a piping usage environment, a pipe thickness measurement result, and the like as parameters, the current state of the pipe is described. No measuring device suitable for recognition is disclosed.

  On the other hand, in these pipes, when an oxide film due to steam is formed inside the pipes, or when deposits are present outside the pipes, the temperature locally rises and creep damage may progress. Since such creep damage is difficult to predict the damage location, at present, the operator visually confirms the degree of bulging of the pipe, which is one of the indexes indicating the degree of creep damage. The work of confirming over a plurality of locations in the direction is performed. However, there is a limit to visually judging the degree of bulging of pipes, and in consideration of the fact that creep damage proceeds rapidly after exceeding a certain amount, a quantitative measurement method with no judgment error Is required. In addition, the heat transfer tubes of the superheater and reheater, and the pipes for sending steam heated by these to the turbine are densely arranged, so use a large measuring device, It is difficult to calibrate (align) the measuring device manually.

  Therefore, an object of the present invention is to provide a measuring apparatus capable of continuously and quantitatively measuring the outer diameter or outer shape of a pipe, particularly the amount of swelling of a pipe used in a boiler. .

The main present invention that solves the above-described problems is a first moving portion that is guided by a first pipe extending substantially parallel to a measurement target pipe and is movable along a longitudinal direction of the first pipe, and the measurement target pipe. A second moving part that is guided by a second pipe extending substantially in parallel with the measurement target pipe on the opposite side of the first pipe and is movable along the longitudinal direction of the second pipe, A support member that connects the first moving unit and the second moving unit, and is supported by the support member so that the positional relationship between the first moving unit and the second moving unit is maintained constant; A measuring unit that moves with the first moving unit, the second moving unit, and the support member, and measures at least one of an outer diameter and an outer shape of the measurement target pipe at each point in the longitudinal direction of the measurement target pipe; wherein the first moving unit, the longitudinal direction of the first pipe Along the front side and the rear side, and through the elastic member disposed so as to surround the periphery of the cross section in the direction substantially perpendicular to the longitudinal direction of the first pipe, The first front moving body and the rear moving body that move along the longitudinal direction of one pipe, and the first front moving body and the rear moving body are connected so that the positional relationship between them is maintained constant. A cross-section in a direction substantially perpendicular to the longitudinal direction of the second pipe disposed on the front side and the rear side along the longitudinal direction of the second pipe. A second front side moving body and a rear side moving body that move along the longitudinal direction of the second pipe while sandwiching the periphery of the elastic member disposed so as to surround the periphery of the second pipe, The two front-side moving bodies and the rear-side moving bodies are connected so that the positional relationship between them is maintained constant. Comprising a second connecting member,
The support member, as described above the first moving part positional relationship between the second moving part is maintained constant, characterized that you connect the second connecting member and the first connecting member Is a measuring device. Other features of the present invention will become apparent from the accompanying drawings and the description of this specification.

  According to the measuring apparatus of the present invention, the outer diameter or the outer shape at each point in the longitudinal direction of the pipe can be measured continuously and quantitatively. The measurement apparatus of the present invention can move so that the measurement reference position and the measurement reference direction with respect to the measurement position are kept constant using the surrounding pipes in an environment where the pipes are densely packed. Before and after the movement, calibration before measurement is unnecessary, and work efficiency is greatly improved.

It is a figure which shows the structure of piping of the measuring object in 1st Embodiment of this invention. It is a side view which shows the structure of the measuring apparatus in 1st Embodiment of this invention. It is a top view which shows the structure of the measuring apparatus in 1st Embodiment of this invention. It is a figure which shows the structure of the wheel of the measuring apparatus in 1st Embodiment of this invention. It is a figure which shows the operation | movement of the movement of the measuring apparatus in 1st Embodiment of this invention. It is a figure explaining the arithmetic processing by the measuring apparatus in 1st Embodiment of this invention. It is a figure which shows the relationship between the amount of swelling of piping, and the remaining life in 1st Embodiment of this invention. It is a side view which shows the structure of the measuring apparatus in 2nd Embodiment of this invention. It is a top view which shows the structure of the measuring apparatus in 2nd Embodiment of this invention. It is a figure which shows the structure of the measuring apparatus in other embodiment of this invention.

  At least the following matters will become apparent from the description of this specification and the accompanying drawings.

<First Embodiment>
=== Configuration of measuring device ===
In the present embodiment, a mode in which a bulging amount of piping (hereinafter referred to as “boiler tube” or simply “piping”) used in a boiler is continuously measured in the longitudinal direction using a measuring apparatus will be described.

  In FIG. 1, an example of the piping P which is a measuring object which concerns on this embodiment is shown. The pipe P used for the boiler is composed of a large number of thin pipes (for example, a diameter of 50 mm) extending substantially in parallel. The distance between the pipes is about the same as the pipe diameter, and the pipes are in a dense state. Yes. The pipe P is made of, for example, a material such as low alloy steel, and has a characteristic that when creep damage occurs, the diameter of a cross section in a direction substantially perpendicular to the longitudinal direction is expanded (hereinafter referred to as “bulging”). . The measuring apparatus according to the present embodiment continuously measures the amount of swelling of the pipe using the pipe around the pipe to be measured (for example, adjacent position) as a guide. The “outer diameter” measured by the measuring apparatus according to the present embodiment is the circumference of the cross section in the direction substantially perpendicular to the longitudinal direction of the pipe for measuring the amount of swelling of the pipe (hereinafter referred to as “the circumference of the pipe”). Means part or all of the diameter.

  Hereinafter, an example of the configuration of the measurement apparatus according to the present embodiment will be described with reference to FIGS. 2A to 2C. 2A is a side view of the measuring device, FIG. 2B is a plan view of the measuring device, and FIG. 2C is a diagram showing wheels of the measuring device. 2A to 2C, the Z axis is an axis along the longitudinal direction of the pipe P3 to be measured. Further, the X axis is an axis along the direction in which the measurement target pipe P3 and the pipe P1 and the pipe P2 which the measurement apparatus guides are adjacent to each other in the direction perpendicular to the longitudinal direction of the measurement target pipe P3. The Y axis represents an axis orthogonal to the X axis and the Z axis. In the following description, they are simply expressed as “X direction”, “Y direction”, and “Z direction”, respectively, the direction indicated by the arrow indicates the + direction, and the direction opposite to the arrow indicates the − direction. Moreover, the arrow M in FIG. 2B represents the moving direction of the measuring apparatus.

The measurement apparatus according to the present embodiment includes a pipe P1 disposed on both sides of a pipe P3 to be measured, a first carriage R and a second carriage L that move along the longitudinal direction of the pipe P2 , and a first carriage R. A support member S that connects the second carriage L, and measuring units T1 and T2 that are attached to the support member S and measure the outer diameter of the pipe P3 are configured.

  The pipe P3 to be measured is any one of the pipes P used in the dense boiler shown in FIG. 1, and the pipes P1 and P2 are pipes around the pipe P3 to be measured, for example, adjacent to each other. It is a installed pipe. The pipe P1 and the pipe P2 are disposed so as to extend substantially parallel to the pipe P3 (Z direction). The positional relationship of these pipes is such that the pipe P1 and the pipe P2 are disposed on the opposite side across the pipe P3 to be measured. Note that “the piping P1 and the piping P2 are disposed on the opposite side across the piping P3 to be measured” means that the piping P1, the piping P2, and the piping P3 to be measured are in a straight line along the X direction. The pipe P1 is arranged on the + X direction side with respect to the measurement target pipe P3, and the pipe P2 is arranged on the −X direction side with respect to the measurement target pipe P3. It is a meaning including various aspects of positional relationships. For example, the pipe P1 and the pipe P2 may be disposed at a front position (−Y direction) with respect to the pipe P3 to be measured.

  The first cart R (first moving unit) is a guide mechanism attached to the pipe P1. The first carriage R is configured by a front side (+ Z direction) moving body R10, a rear side (−Z direction) moving body R20, and a connecting member R30 connecting them along the longitudinal direction of the pipe P1. (See FIG. 2A). The front-side moving body R10 and the rear-side moving body R20 have the same configuration, and both are arranged around the pipe P1 so as to surround an elastic member (for example, a spring member). It moves along the longitudinal direction of the pipe P1 while being pinched via the member (details will be described later).

  The connecting member R30 connects the front moving body R10 and the rear moving body R20 so that the positional relationship (representing relative coordinates and direction; the same applies hereinafter) is maintained constant. The connecting member R30 is a rod-like member, and for example, one end thereof is fixed to the front moving body R10 with a screw, and the other end is fixed to the rear moving body R20 with a screw to connect them. For this reason, the front-side moving body R10 and the rear-side moving body R20 are maintained in substantially the same positional relationship before and after movement.

  The second cart L (second moving unit) is a guide mechanism attached to the pipe P2. A connection connecting the front side (+ Z direction) moving body L10, the rear side (−Z direction) moving body L20, and the front side moving body L10 and the rear side moving body L20 along the longitudinal direction of the pipe P2. And a member L30 (see FIG. 2A). As with the front moving body R10 and the rear moving body R20 of the first carriage R, the front moving body L10 and the rear moving body L20 are both elastic members (for example, springs) around the pipe P2. It is arranged so as to surround the member) and moves along the longitudinal direction of the pipe P2 while being sandwiched through the elastic member. Similarly to the connection member R30, the connection member L30 connects them so as to fix the positional relationship between the front-side moving body L10 and the rear-side moving body L20. Maintain a relationship.

  Note that the first carriage R and the second carriage L have a rotary encoder on one of the wheels (R13 and the like described later) constituting the measurement target pipe P3 in order to grasp the measurement position of the measurement target pipe P3. It is the structure which can detect (not shown). The first cart R and the second cart L are examples of a moving mechanism (moving unit) that moves along the pipe.

  The support member S is a member that connects the first carriage R and the second carriage L so that their positional relationship is maintained constant. The support member S is, for example, a rod-like member extending in the X direction. One end of the support member S is fixed to the connection member R30 of the first carriage R with a screw, and the other end is fixed to the connection member L30 of the second carriage L with a screw. To connect them. The first carriage R and the second carriage L are maintained at a position in a direction (X direction) substantially perpendicular to the longitudinal direction of the pipe P3 to be measured. In addition, if the material which comprises the supporting member S, connecting member R30, and connecting member L30 is a material which an external shape cannot change easily, it is arbitrary.

  The positional relationship between the first carriage R and the second carriage L is maintained constant before and after the movement of the first carriage R and the second carriage L by being connected to the support member S. That is, by the said structure, the 1st trolley | bogie R, the 2nd trolley | bogie L, and the supporting member S move along the longitudinal direction of the piping P3, maintaining a positional relationship constant. Note that “the positional relationship is kept constant” means that an angle formed by a line segment connecting the component elements within a certain range of the distance between the line segments connecting the component elements of a plurality of component elements. Means within a certain range (the same applies hereinafter).

  The measurement units T1 and T2 are devices that are supported by the support member S and measure the outer diameter of the measurement portion of the pipe P3 to be measured using laser light. More specifically, the measurement units T1 and T2 are respectively a 3D laser scanner device T1 attached to the first carriage R side of the support member S and a 3D attached to the second carriage L side of the support member S. This is a laser scanner device T2. That is, the measurement units T1 and T2 are arranged so as to sandwich the measurement target pipe P3 from the + X direction side and the −X direction side. And the measurement parts T1 and T2 move with the 1st trolley R, the 2nd trolley L, and the support member S along the longitudinal direction of the piping P3, keeping a positional relationship constant. With this configuration, the coordinates (hereinafter referred to as measurement reference positions TC1 and TC2) of the measurement units T1 and T2 with respect to the measurement position of the pipe P3 and the reference direction (hereinafter referred to as measurement) with respect to the measurement position of the pipe P3. The reference directions TB1 and TB2) are kept constant before and after the movement (details will be described later). Note that the measurement reference positions TC1 and TC2 represent, for example, laser emission positions with respect to the measurement position of the pipe P3 when the 3D laser scanner devices T1 and T2 measure the pipe P3. Further, the measurement reference directions TB1 and TB2 represent, for example, directions (center directions) of laser beams emitted from the measurement reference positions TC1 and TC2 of the 3D laser scanner devices T1 and T2 to the measurement position of the pipe P3. .

  The measurement apparatus according to the present embodiment moves the first carriage R, the second carriage L, the support member S, and the measurement units T1 and T2 as a unit, and at each point in the longitudinal direction of the pipe P3 to be measured, the measurement unit The outer diameter of the pipe P3 is measured using T1 and T2. Finally, by combining these measurement results (image composition or the like), the outer diameter around the pipe P3 to be measured is wider than when one of the measurement units T1 and T2 is used. (E.g., the entire circumference of the pipe).

= Configuration of mobile body =
The moving bodies R10, R20, L10, and L20 of the first carriage R and the second carriage L have the same configuration. Therefore, the moving body R10 will be described as an example. The moving body R10 includes a first frame member R11, a second frame member R12, a first wheel R13, a second wheel R14, a third wheel R15, a fourth wheel R16, a hinge R17, and a frame coupling portion R18. Is done.

  The first frame member R11 is a frame member that is disposed on the + X direction side of the pipe P1 and has a shape along the outer shape (cylindrical shape) around the pipe P1, and the second frame member R12 is the − of the pipe P1. It is a frame member having a shape along the outer shape (cylindrical shape) around the pipe P1 disposed on the X direction side, and the pipe P1 surrounds the entire periphery by the first frame member R11 and the second frame member R12. Is done. More specifically, in the first frame member R11 and the second frame member R12, a cylinder having a larger diameter than the outer shape around the pipe P1 is substantially divided into two along the height direction (Z direction) of the cylinder. It is the member which makes the shape of one and the other of them. The first frame member R11 and the second frame member R12 surround the periphery of the pipe P1, and one end and the other end of the first frame member R11 in the Y direction and one end of the second frame member R12 in the Y direction. And the other end is connected by hinge R17 and frame coupling | bond part R18, and forms the frame which exhibits the cylindrical shape in alignment with the external periphery of piping P1. That is, the frame body is configured so as to surround the circumference of the pipe P1 in the XY plane and to form a constant interval with the circumference of the pipe P1. The first frame member R11 and the second frame member R12 are arbitrary as long as the outer shape is difficult to deform.

  The hinge R17 has a hole formed along the height direction (Z direction) at one end of the first frame member R11 and a hole formed along the height direction (Z direction) at one end of the second frame member R12. Are connected by a connecting pin so as to be rotatable at the position of the connecting pin so that they can be attached to the pipe P1.

  Further, the frame coupling portion R18 is configured so that the other end of the first frame member R11 and the other end of the second frame member R12 are surrounded by the first frame member R11 and the second frame member R12. It is a fixing member for connecting. That is, when the moving body R10 is attached to the pipe P1, the first frame member R11 and the second frame member R12 are rotated about the hinge R17. And in the state which the other end of 1st frame member R11 and the other end of 2nd frame member R12 contacted, these are fixed using frame body coupling | bond part R18, these are 1st wheel R13, 2nd. A cylindrical frame body is formed along the outer diameter of the pipe P1 so as to press the circumference of the pipe P1 through the wheel R14, the third wheel R15, and the fourth wheel R16 (hereinafter simply referred to as “frame body”). say). In the present embodiment, the surface (inner peripheral surface) facing the periphery of the pipe P1 of the frame body has a shape along the outer shape of the periphery of the pipe P1, whereby the first wheel R13, the second wheel R14, The configuration is such that the three wheels R15 and the fourth wheel R16 are arranged so as to easily rotate and move along the longitudinal direction of the pipe P1, and the frame bodies R11 and R12 easily hold the periphery of the pipe P1 through these. Yes. Note that “clamping” means holding the movable body R10 at a predetermined position of the pipe P1 by pressing the periphery of the pipe P1 with the frame bodies R11 and R12.

  The first wheel R13, the second wheel R14, the third wheel R15, and the fourth wheel R16 are attached to the frame bodies R11 and R12 via spring mechanisms so as to surround the pipe P1, and the frame body R11 while being in contact with the pipe P1. , R12 is moved in the Z direction.

  FIG. 2C shows an example of the configuration of the first wheel R13. In addition, since 1st wheel R13, 2nd wheel R14, 3rd wheel R15, and 4th wheel R16 have the same structure, only the structure of 1st wheel R13 is demonstrated here. The first wheel R13 includes a wheel R131, a wheel bearing R132, a connection plate R133, a connection spring R134, and a connection portion R135. And these are arrange | positioned so that the wheel R131 may rotate and move along the longitudinal direction (Z direction) of the piping P1, contacting the piping P1. That is, the wheel bearing R132 supports the wheel R131 so that the wheel R131 abuts along the longitudinal direction (Z direction) of the pipe P1, and these are fixed to the connection plate R133, and the connection plate R133 and the connection spring R134 are connected. And is attached to the frame bodies R11 and R12 by the connecting portion R135. The wheel R131, the wheel bearing R132, and the connection plate R133 are attached to the frame bodies R11 and R12 via the connection spring R134, thereby moving up and down in accordance with the expansion and contraction of the connection spring R134 (the H direction in FIG. 2C). ).

  The connection spring R134 serves to stabilize the positions of the frame bodies R11 and R12 relative to the pipe P1 before and after the moving body R10 moves, and to maintain a constant positional relationship between the first carriage R and the second carriage L. Have

= Movement of measuring device movement =
FIG. 3 shows an example of the movement operation of the measuring apparatus. M1, M2, and M3 in FIG. 3 represent the positions of the measurement device in time series when the measurement device moves from M1 to M2 and M3 in order. Further, PP1 and PP2 in FIG. 3 represent bulging portions in the middle of the pipe P1.

  In the measuring apparatus, the first carriage R moves along the longitudinal direction of the pipe P1, the second carriage L moves along the longitudinal direction of the pipe P2, and these positional relationships are maintained constant by the support member S. Move together. At this time, the measuring apparatus operates in accordance with changes in the outer shapes of the pipes P1 and P2 by connection springs provided on the wheels of the moving bodies R10, R20, L10, and L20, and the measurement reference positions of the measuring units T1 and T2 It moves so as to keep TC1, TC2 and measurement reference directions TB1, TB2 constant.

  Specifically, the measuring device moves between a frame (R11, R12, etc.) of the moving body (R10, etc.) and the circumference of the pipe when the outer diameter of the pipe moves at a certain position (position M1). Move with the interval kept constant. At this time, the positional relationship of the first carriage R, the second carriage L, and the support member S of the measuring device with respect to the pipe P3 is similarly maintained constant.

  Then, when the measuring apparatus moves at a position (the bulging position PP1) where a part of the pipe P1 bulges in the circumferential direction (+ X, -X, + Y, -Y direction) (the position of M2), At the extended position PP1, the connection spring of the moving body R10 moves up and down to shorten the distance between the frame bodies R11 and R12 and the periphery of the pipe P1, and the positions of the frame bodies R11 and R12 are kept constant. Is done. Accordingly, the positional relationship of the first carriage R, the second carriage L, and the support member S with respect to the pipe P3 is kept constant, and the measurement reference positions TC1 and TC2 and the measurement reference directions TB1 and TB2 of the measurement units T1 and T2 are also constant. Maintained. Note that arrows N1 and N2 in FIG. 3 represent forces acting on the measuring device at this time.

  Then, when the measuring device moves at a position where the part of the pipe P1 bulges in one direction (+ X direction) (the bulging position PP2) (the position of M3), the measuring apparatus moves at the bulging position PP2. The connection spring of the body R10 operates in the + X direction, and a force (N3) acts so as to shift the direction in which the first carriage R faces. However, at this time, the drag (N4) of the support member S works, so that the positional relationship of the first carriage R, the second carriage L, and the support member S with respect to the pipe P3 is maintained constant. And the measurement reference positions TC1, TC2 and the measurement reference directions TB1, TB2 of the measurement units T1, T2 are also maintained constant. Note that arrows N3 and N4 in FIG. 3 represent forces acting on the measuring device at this time.

  The measurement apparatus according to the present embodiment has a configuration in which the first carriage R and the second carriage L are provided with elastic members (connection springs) so as to surround the pipes P1 and P2, respectively. Therefore, the measurement object T1, T2, the positional relationship of the support member S with respect to the pipe P3, and the measurement reference positions TC1, TC2, measurement reference directions TB1, TB2 of the measurement parts T1, T2 are maintained constant. It becomes possible to move along the longitudinal direction of the pipe P3. Note that the measuring apparatus according to the present embodiment has a positional relationship with respect to the pipe P3 of the first carriage R, the second carriage L, and the support member S not only at the bulged position as described above but also at a place where the pipe is curved. It is possible to move smoothly while maintaining the above. In the measurement apparatus according to the present embodiment, the first carriage R and the second carriage L are respectively moved to the front (+ Z direction) moving bodies R10 and L10 and the rear (−Z direction) moving bodies R20 and L20. And the connecting members R30 and L30 that connect them to each other, the moment acting around the X axis and the moment acting around the Y axis are stabilized.

=== Measuring method of measuring device ===
Next, with reference to FIG. 4, the measuring method of the measuring device will be described.

  The measuring apparatus according to the present embodiment measures the outer diameter of the pipe P3 to be measured by the 3D laser scanner apparatuses T1 and T2. Each of the 3D laser scanner devices T1 and T2 includes an emitting unit TA, a light receiving unit TB, and a driving unit TC, and using these, the coordinate position of the pipe P3 to be measured, that is, the outer diameter (and outer shape) is measured. To do.

  Specifically, the emission unit TA includes, for example, a modulation signal oscillator and a semiconductor light emitting element, and emits a He—Ne laser subjected to intensity modulation at a high frequency. The light receiving unit TB includes, for example, a photodetector and a phase meter, and measures the phase difference of each modulated wave between the reflected light of the laser and the internal reference standard, thereby the laser. The distance between the spot irradiated with 3D laser scanner devices T1 and T2 is calculated (phase difference method). Then, the drive unit TC measures the coordinate position of the measurement target within a certain range, that is, the outer shape and the outer diameter, by rotating the direction of the laser beam emitted from the emission unit TA.

  Here, as described above, the measurement apparatus has the measurement reference directions TB1 and TB2 and the measurement reference positions TC1 and TC2 of the laser emission direction of the emission part TA of the 3D laser scanner apparatuses T1 and T2 constant at each moving point. Operates to be maintained. For this reason, the initial coordinate axes of the 3D laser scanner devices T1 and T2 are determined, and the outer shape is continuously extended over each point in the longitudinal direction of the pipe P3 without performing calibration work (positioning work) at each moving point. And the outer diameter can be measured. In this embodiment, every time the pipe P3 to be measured is moved 10 cm in the longitudinal direction, the outer diameter is measured by the 3D laser scanner devices T1 and T2.

  In the present embodiment, the + X side outer shape of the pipe P3 is measured from the 3D laser scanner device T1 installed on the first carriage R side, and the 3D laser scanner device T2 installed on the second carriage L side is measured. By measuring the external shape of the pipe P3 on the −X side, the bulging amount is measured over substantially the entire circumference of the pipe P3. That is, the measurement device according to the present embodiment calculates the measurement result of the bulging amount over substantially the entire circumference of the pipe P3 based on the measurement results of the outer and outer diameters of the 3D laser scanner devices T1 and T2.

  In FIG. 4, an example of the calculation method of the measurement result of the external shape and outer diameter covering the perimeter of the piping P3 is shown. Note that AT1 in FIG. 4 represents a measurement result of the 3D laser scanner device T1 at a certain point. AT2 represents the measurement result of the 3D laser scanner device T2 at a point corresponding to AT1. AT3 represents a measurement result calculated based on AT1 and AT2. Z0 represents the position where the bulging of the pipe P3 is detected.

  The measurement result AT1 of the 3D laser scanner device T1 and the measurement result AT2 of the 3D laser scanner device T2 are respectively acquired as coordinate information of the pipe P3. Further, the measurement of the 3D laser scanner device T1 and the measurement of the 3D laser scanner device T2 are performed so as to partially overlap the periphery of the pipe P3, and the AT1 ′ region of the measurement result AT1 of the 3D laser scanner device T1. And the coordinate information obtained by overlapping the AT2 ′ region of the measurement result AT2 of the 3D laser scanner device T2. At this time, the shape of the pipe P3 at the position Z0 where the bulge of the pipe P3 is detected exhibits a shape that can be distinguished from the other areas of the pipe P3. Therefore, the shape of the AT1 ′ region of the measurement result AT1 and the measurement result The shape of the AT2 ′ area of AT2 is compared, and coordinate conversion is performed so that both overlap at the bulging detection position Z0 of the pipe P3.

  Thereby, the measurement result AT1 of the 3D laser scanner device T1 and the measurement result AT2 of the 3D laser scanner device T2 are synthesized, and the outer shape AT3 near the position Z0 where the bulging of the pipe P3 is detected can be calculated. . That is, it is possible to calculate the bulging amount over substantially the entire circumference of the pipe P3. The measurement apparatus according to the present embodiment calculates the bulge amount at a position where the bulge of each point in the longitudinal direction of the pipe P3 is detected by repeating the above steps.

  In addition, when the outer diameter of the pipe P3 is constant over the length direction in the design standard, the bulge amount of the pipe P3 can be calculated by subtracting the constant value from the pipe P3. . Further, if not constant, the outer diameter of the pipe P3 is measured in advance at each point in the length direction (Z direction) before the bulging occurs, stored in association with the point, and the pipe measured in advance. The bulge amount can be calculated by comparing the outer diameter associated with the point of P3 and the outer diameter after the bulge. At this time, the position of the Z coordinate at each point in the longitudinal direction of the pipe P3 is calculated based on the rotary encoders of the first carriage R and the second carriage L, for example.

  Here, the configuration (arithmetic apparatus) that performs the arithmetic processing may be included in the 3D laser scanner apparatus T1 or the 3D laser scanner apparatus T2, or may be included in another apparatus. For example, after performing measurement at each point in the longitudinal direction of the pipe P3, the arithmetic unit synthesizes the measurement result AT1 and the measurement result AT2 at each point in the longitudinal direction of the pipe P3, and based on the calculation result. The image may be reconstructed and output for display. In addition, when the measurement result AT1 of the 3D laser scanner device T1 and the measurement result AT2 of the 3D laser scanner device T2 are combined, the shape used as a reference is bulged if it can be distinguished from other regions. Instead of the position, another position may be used.

=== Predicting remaining life ===
In the present embodiment, as described above, the remaining life of the pipe P3 is calculated based on the bulging amount of the pipe P3. FIG. 5 shows an example of the relationship between the bulge amount of the pipe and the remaining life. The relationship between the bulge amount of the pipe and the remaining life is calculated in advance by, for example, conducting an experiment on a pipe of the same type (for example, the same material and the same film thickness) as the pipe P3 to be measured. The bulge amount of the pipe used as a reference at this time is, for example, the bulge amount with respect to the outer diameter of the design standard pipe, or the degree (ratio) of the bulge with respect to the outer diameter of the design standard pipe. The remaining life is, for example, the number of years that the pipe can be used (the number of years until breakage).

  Then, based on the measurement result of the bulge amount of the pipe at each point in the longitudinal direction of the pipe P3 and the relationship between the bulge amount of the pipe and the remaining life, the remaining life of each point is calculated, and replacement / repair Determine when. The calculation process may be performed by an operator, or the 3D laser scanner device T1, the 3D laser scanner device T2, or another device may be provided as the functional configuration. For example, the measuring device can display the remaining life of the pipe at each point in the longitudinal direction of the pipe based on the measurement result of the amount of swelling of the pipe and the data indicating the relationship between the amount of swelling of the pipe and the remaining life You may have the structure to do.

  In addition, the measuring device sets a bulge amount that serves as a threshold value indicating the timing of replacement and repair based on data indicating the relationship between the bulge amount of the pipe and the remaining life, and the bulge amount at the position to be measured When it is determined that the bulging amount is exceeded, a function (warning unit) that issues a warning by sound or the like may be provided. Thereby, the worker can determine the remaining life by an extremely simple work. As shown in FIG. 5, the creep damage of the pipe increases with progress, and the bulging increases rapidly and breaks. Therefore, for example, by setting the bulging amount at the time when the progress degree becomes fast as a threshold value for issuing a warning, it is possible to reliably prevent the pipe from being broken.

  As mentioned above, according to the measuring device concerning this embodiment, the outside diameter or external shape in each point of the longitudinal direction of piping can be measured continuously and quantitatively. In particular, the measuring apparatus according to the present embodiment uses an elastic member (such as a connection spring R134) that surrounds the pipe P3 with pipes P1 and P2 arranged on both sides of the pipe P3 to be measured as a guide. ) Through the pipes P1 and P2. Therefore, the measuring apparatus has a positional relationship with respect to the pipe P3 of the first carriage R, the second carriage L, and the support member S even in the pipes P1 and P2 that are partially deformed due to bulging or have curved portions. It is possible to move smoothly while maintaining the above. That is, the measurement apparatus uses the pipe itself, particularly in an environment where the pipes are densely packed, and the measurement reference position with respect to the measurement position, the measurement reference direction (for example, the laser emission positions of the 3D laser scanner devices T1 and T2, It is possible to move so that the center of the emitted laser) is maintained constant, and before and after the movement, calibration before measurement is unnecessary (or very little calibration amount), and work efficiency is greatly improved. The

  In particular, when a 3D laser scanner device is used to measure the outer diameter or outer shape of the pipe P3, the 3D laser scanner device itself can measure a certain area of the measurement target. Coupled with this, calibration before measurement is unnecessary.

  In addition, the measuring apparatus according to this embodiment includes a 3D laser scanner device T1 that measures the outer diameter of the pipe from the first cart R side, and a 3D laser scanner that measures the outer diameter of the pipe from the second cart L side. Since the measuring units T1 and T2 are configured by the apparatus T2, it is possible to measure the outer diameter of the pipe over a wider range (for example, substantially the entire circumference) than when measuring the outer diameter from only one direction. . Piping bulges only in one direction of the piping (+ X direction, -X direction, + Y direction, -Y direction, etc.) depending on the state of deposits outside the piping and the state of the oxide film inside the piping. In some cases, the bulge progresses, but this configuration can also detect the bulge in that case.

  In addition, since the measuring apparatus according to the present embodiment can perform non-contact measurement on the pipe P3 to be measured, the pipe to be measured even when the strength of the pipe P3 to be measured is small. High-precision measurement can be performed without causing distortion in P3.

Second Embodiment
This embodiment is different from the first embodiment in that a digital caliper is used instead of an aspect using a 3D laser scanner device as a configuration of the measurement units T1 and T2. In addition, description is abbreviate | omitted about the structure which is common in 1st Embodiment (Hereafter, "'" is attached | subjected and shown about the structure different from the measuring apparatus which concerns on 1st Embodiment).

  Hereinafter, with reference to FIGS. 6A and 6B, an example of the configuration of the measurement apparatus according to the present embodiment will be described. 6A is a side view of the measuring apparatus, and FIG. 6B is a diagram showing a plan view of the measuring apparatus. The X-axis, Y-axis, and Z-axis have the same definitions as in FIGS. 2A and 2B, respectively.

  The measurement unit according to the present embodiment includes a first reference member T1 ′, a second reference member T2 ′, a distance measurement device T3 ′, a first biasing spring T4 ′, and a second biasing spring T5 ′. . These are supported by the support member S and move together with the support member S. Similarly to the configuration of the measurement units T1 and T2, the positional relationship of the first carriage R, the second carriage L, and the support member S with respect to the pipe P3 is maintained constant, so that the first reference member with respect to the position of the measurement target is maintained. The positions of T1 ′ and the second reference member T2 ′ (measurement reference positions TC1 ′ and TC2 ′) and the direction (measurement reference direction TB ′) are kept constant. In the present embodiment, the measurement reference positions TC1 ′ and TC2 ′ represent the positions of the first reference member T1 ′ and the second reference member T2 ′ with respect to the measurement target position of the pipe P3, and the measurement reference direction TB ′ is The angle which the surface which 1st reference member T1 'and 2nd reference member T2' contact | abut with respect to the position of the measuring object of the piping P3 makes is represented.

  The first reference member T1 ′ and the second reference member T2 ′ are attached to the distance measuring device T3 ′, and based on the distance in the X direction, the distance measuring device T3 ′ has the outside of the pipe P3 to be measured in the X direction. This is a member for measuring the diameter. Further, the first reference member T1 ′ and the second reference member T2 ′ are arranged so as to face each other in the X direction, and have a shape such that the surfaces on which the first reference member T1 ′ and the second reference member T2 ′ face each other are substantially parallel. It is a member made of a high material.

  The first reference member T1 ′ and the second reference member T2 ′ are attached so that a part thereof is inserted into the distance measuring device T3 ′ along the X direction, and freely along the X direction. It can be moved. Then, the first reference member T1 ′ and the second reference member T2 ′ are respectively brought into contact with the pipe P3 to be measured by the first biasing spring T4 ′ and the second biasing spring T5 ′ attached to the support member S, respectively. The surface on the side where the first reference member T1 ′ and the second reference member T2 ′ are opposed to each other is biased in the contact direction (X direction) and is maintained so as to contact the pipe P3 to be measured before and after the movement. .

  The distance measuring device T3 'is a device that measures the distance between the first reference member T1' and the second reference member T2 'attached so as to be inserted therein. The distance measuring device T3 ′ includes, for example, a first capacitor formed by one electrode provided inside the distance measuring device T3 ′ and a portion where the first reference member T1 ′ is inserted as another electrode. Based on the capacity of the first reference member T1 ′, the coordinate in the X direction is determined. Similarly, the second capacitor is formed by one electrode provided in the distance measuring device T3 ′ and the other electrode at the portion where the second reference member T2 ′ is inserted, and based on the capacitance of the second capacitor. Thus, the coordinate in the X direction of the second reference member T2 ′ is determined. Thus, the distance measuring device T3 'measures the outer diameter of the pipe P3 to be measured by measuring the distance between the first reference member T1' and the second reference member T2 '.

  As described above, according to the measurement apparatus according to the present embodiment, as in the measurement apparatus according to the first embodiment, the measurement reference position with respect to the measurement position and the measurement reference direction can be moved while being maintained constant. The outer diameter at each point in the longitudinal direction of the pipe can be measured continuously and quantitatively.

<Other embodiments>
In the measurement apparatus according to each of the above embodiments, the pipes P1 and P2 adjacent to the pipe P3 to be measured are used as a guide. However, the pipes used as guides are not necessarily adjacent pipes, and may be pipes provided on both sides of the pipe P3 to be measured among a large number of surrounding pipes extending in parallel.

  In addition, when there are a large number of pipes extending substantially in parallel, the measuring apparatus may measure a plurality of pipes collectively. In FIG. 7, an example of the aspect which measures several piping collectively is shown. In FIG. 7, in addition to the pipe P3, the pipe P4 is also a measurement target. In this case, the measuring apparatus is arranged on the opposite side of the pipe P1 across the pipe P4, and further uses the pipe P5 extending substantially parallel to the pipe P4 as a guide. Then, the third carriage Q having the same configuration as described above is installed in the pipe P5, and connected by the support member S2 so that the positional relationship between the first carriage R and the third carriage Q is maintained constant. What is necessary is just to set it as the structure which supports measurement part T3, T4 by support member S2. Even in this case, similarly to the above, the measurement apparatus can be configured to move so that the measurement reference position and the measurement reference direction with respect to the measurement position of the laser emission part or the like are maintained constant. Thereby, the work efficiency of the remaining life inspection can be further improved.

  In the above embodiments, the position of the moving body (R10, etc.) is stabilized with respect to the pipe P1 by the connection spring (R134, etc.) arranged so as to surround the circumference of the pipe, and the first cart R However, other configurations may be used as long as the function can be ensured. For example, the wheel (R131, etc.) may be made of a rubber material, or the cushion material may be interposed between the periphery of the pipe and the frame (R11, R12, etc.).

  In each of the above embodiments, the wheels (R131, etc.) of the first carriage R and the second carriage L are cylindrical members. However, the first carriage R and the second carriage L can be smoothly moved along the pipe. Any member that has a spherical shape may be used as long as it can be moved. In this case, the wheel (R131 or the like) may be configured to be rotatable by being connected to a ball bearing. Further, in each of the above embodiments, the frame (R11, R12, etc.) constituting the moving body is shaped to surround the entire circumference of the pipe along the outer circumference of the pipe, but the circumference of the pipe is sandwiched. Any other configuration may be used as long as it can be configured. For example, as a rectangular shape having an opening in one direction (for example, + Y direction), the pipe may be sandwiched by connection springs (R134, etc.).

  In each of the above embodiments, the support member S has a structure in which one end is fixed to the connection member R30 of the first carriage R with a screw and the other end is fixed to the connection member L30 of the second carriage L with a screw. The configuration for connecting the first cart R and the second cart L may be another configuration as long as the positional relationship can be maintained constant. For example, it is good also as a thing provided with the structure which can expand-contract the length of a X direction according to the distance of the X direction of the piping P1 and the piping P2, and a biasing mechanism in the connection part of the 1st cart R and the 2nd cart L It is good also as a structure which raises and raises the function in which those positional relationships are maintained constant.

  In each of the above embodiments, the operator manually moves the first carriage R and the second carriage L along the pipe P1 and the pipe P2, respectively. Good. For example, a configuration may be adopted in which the driving force is applied to the frame (R11, R12, etc.) of the first carriage R and the second carriage L by the motor in the direction along the pipes P1 and P2 and moved in the Z direction. Good. In that case, the measurement of the position in the Z direction can also be performed by the driving amount of the motor.

  Moreover, in each said embodiment, in order to measure the bulging amount of piping, it was set as the structure which measures the outer diameter of piping by measuring part T1, T2, but only the external shape of one side of piping was carried out by 3D laser scanner apparatus etc. It is good also as a structure which measures. Even in this case, it is possible to detect that the pipe is partially bulged from a change in the outer shape with respect to another region.

  Further, in each of the above embodiments, the support member S is maintained at a constant positional relationship between the first carriage R and the second carriage L in a direction substantially perpendicular to the longitudinal direction of the pipe P3 to be measured. As described above, the first cart R and the second cart L are connected. However, as long as the positional relationship between the first carriage R and the second carriage L is kept constant by the support member S, the positional relationship between the first carriage R and the second carriage L is not a position in a direction substantially perpendicular to the longitudinal direction of the pipe P3 to be measured. However, the same effects as those of the above embodiments can be obtained.

  Each of the above embodiments discloses an invention specified by the following description.

The main present invention that solves the above-described problem is guided by a first pipe P1 extending substantially parallel to the measurement target pipe P3 and is movable along the longitudinal direction of the first pipe P1, and the measurement. A second moving part that is guided by a second pipe P2 that extends substantially parallel to the measurement target pipe P3 across the target pipe P3 and is movable along the longitudinal direction of the second pipe P2. L, a support member S that connects the first moving unit R and the second moving unit L, and a supporting member S so that the positional relationship between the first moving unit R and the second moving unit L is maintained constant. Is moved together with the first moving part R, the second moving part L, and the support member S, and at least one of the outer diameter and the outer shape of the measurement target pipe P3 is measured at each point in the longitudinal direction of the measurement target pipe P3. Measuring units (T1, T2, T1 ′, T2 ′, T3 ′, T4, T5, etc.) The provided, first moving portion R is disposed on the front and rear sides along the longitudinal direction of the first pipe P1, distribution so as to surround the longitudinal direction around a substantially vertical direction of the cross-section of the first pipe P1 The first front moving body R10 and the rear moving body R20 that move along the longitudinal direction of the first pipe P1 while sandwiching the periphery thereof through the provided elastic member (R134, etc.), and the first A first connecting member R30 that connects the front moving body R10 and the rear moving body R20 so that the positional relationship between them is maintained constant, and the second moving portion L is in the longitudinal direction of the second pipe P2. The circumference of the second pipe P2 arranged on the front side and the rear side along the longitudinal direction of the second pipe P2 is sandwiched by an elastic member (such as R134) disposed so as to surround the circumference of the cross section. Meanwhile, the second front moving body L that moves along the longitudinal direction of the second pipe P2 And a second connecting member L30 for connecting the second moving member L20 and the second moving member L20 so that the positional relationship between the second moving member L10 and the second moving member L20 is maintained constant. S, as the positional relationship between the first moving portion R and the second moving portion L is kept constant, characterized that you connected to the first connecting member R30 and the second connecting member L30 It is a measuring device. Thereby, the outer diameter or the outer shape at each point in the longitudinal direction of the pipe can be measured continuously and quantitatively. Then, in an environment where the pipes are densely packed, the pipe itself can be used to move so that the measurement reference position and the measurement reference direction with respect to the measurement position are kept constant. Calibration is unnecessary, and the working efficiency is greatly improved. In addition, since the measurement target pipe P3 can be measured in a non-contact manner, even if the measurement target pipe P3 has a low strength, the measurement target pipe P3 is not distorted. Highly accurate measurement can be performed. This can further improve the stabilization of the measuring device with respect to the moment about the X axis and the moment about the Y axis.

  At this time, the first moving part R is surrounded by a wheel having a connection spring (such as R134) disposed so as to surround the periphery of the cross section in the direction substantially perpendicular to the longitudinal direction of the first pipe P1. The connecting spring is disposed along the longitudinal direction of the first pipe P1 while being sandwiched, and the second moving portion L is disposed so as to surround the periphery of the cross section in a direction substantially perpendicular to the longitudinal direction of the second pipe P2. It may be one that moves along the longitudinal direction of the second pipe P2 while sandwiching the periphery thereof via a wheel having (R134 etc.).

  The measurement units (T1, T2) may be 3D laser scanner devices. As a result, the 3D laser scanner device itself can measure a certain area of the measurement target, and therefore, calibration before measurement is not necessary in combination with the guide mechanism.

  Further, the measurement unit includes a first measurement unit T1 that measures at least one of an outer diameter and an outer shape of the measurement target pipe P3 from the first moving unit R side, and a first measurement unit from the second moving unit L side. A second measuring unit T2 that measures at least one of the outer diameter and the outer shape of the measurement target pipe P3 so as to partially overlap the measurement position of the unit, and the measuring device includes the first measuring unit T1. Based on the measurement result and the measurement result of the second measurement unit T2, the measurement result of at least one of the outer diameter and the outer shape of the measurement target pipe P3 over a wider range than the measurement result of the first measurement unit T1 is obtained. An arithmetic device for calculation may be further provided. Accordingly, it is possible to measure the outer diameter of the pipe over a wide range (for example, substantially the entire circumference) as compared with the case where the outer diameter is measured from only one direction.

  The measuring device may further include a warning unit that issues a warning according to the remaining life calculated based on the measurement result of at least one of the outer diameter and the outer shape of the measurement target pipe P3. Thereby, the worker can determine the remaining life by an extremely simple work.

  Moreover, the measurement object piping P3, the 1st piping P1, and the 2nd piping P2 may be a boiler tube provided in the boiler inside.

  In addition, the support member S is configured so that the positional relationship between the first moving part R and the second moving part L is constantly maintained at a position in a direction substantially perpendicular to the longitudinal direction of the measurement target pipe P3. The first moving unit R and the second moving unit L may be connected.

  Further, the second measurement target pipe P4 extending substantially parallel to the measurement target pipe P3 and the second measurement target pipe P4 are straddled across the first pipe P1 on the side opposite to the measurement target pipe P3. On the opposite side to P1, a third pipe P5 extending substantially parallel to the second measurement target pipe P4 and an elasticity arranged so as to surround the periphery of a cross section in a direction substantially perpendicular to the longitudinal direction of the third pipe P5 The positional relationship between the third moving part Q that moves along the longitudinal direction of the third pipe P5, the first moving part R, and the third moving part Q while sandwiching the periphery thereof via a member (R134, etc.) Is maintained constant, the second support member S connecting the first cart and the third cart, and the first support R and the third mover Q supported by the second support member S. And the second support member S, and the second measurement target at each point in the longitudinal direction of the second measurement target pipe P4. A third measuring unit for measuring at least one of the outer diameter and the outer shape of the pipe P4, may further comprise a. This makes it possible to inspect the remaining life of a plurality of pipes in a lump and further improve work efficiency.

  The main present invention for solving the above-described problem is a measurement method for measuring at least one of the outer diameter and the outer shape of the measurement target pipe P3, the first pipe P1 extending substantially parallel to the measurement target pipe P3, and the measurement Along the longitudinal direction of the first pipe P1 is guided by the first pipe P1 to the second pipe P2 extending across the target pipe P3 and substantially parallel to the measurement target pipe P3 on the opposite side of the first pipe P1. The first moving unit R and the second moving unit are referred to as a movable first moving unit R and a second moving unit L guided by the second pipe P2 and movable along the longitudinal direction of the second pipe P2. Measuring units (T1, T2, T1 ′, T2 ′, T3 ′, T4, T5, etc.) that are provided so that the positional relationship with L is maintained constant and move together with the first moving unit R and the second moving unit L By measuring at each point in the longitudinal direction of the measurement target pipe P3 It is a measuring method characterized by measuring at least one of the outer diameter and the outer shape of the target pipe P3.

  At this time, the measurement target pipe P3 is any one of three or more pipes arranged substantially parallel to each other, and the first pipe P1 and the second pipe P2 are three or more pipes. Of these, a pipe adjacent to the measurement target pipe P3 may be used.

  Further, the three or more pipes may be a boiler tube provided inside the boiler.

  As mentioned above, although the specific example of this invention was demonstrated in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

P1, P2, P3, P4, P5 Piping R, L, Q Bogie T1, T2, T3, T4, T1 ′, T2 ′, T3 ′, T4 ′, T5 ′ Measuring unit S, S2 Support member

Claims (11)

A first moving part that is guided by a first pipe extending substantially parallel to the pipe to be measured and is movable along the longitudinal direction of the first pipe;
A second moving portion that is guided by a second pipe that extends substantially parallel to the measurement target pipe on the opposite side of the first pipe across the measurement target pipe and is movable along the longitudinal direction of the second pipe When,
A support member that connects the first moving unit and the second moving unit such that the positional relationship between the first moving unit and the second moving unit is maintained constant;
It is supported by the support member and moves together with the first moving unit, the second moving unit, and the support member, and at each point in the longitudinal direction of the measurement target pipe, at least the outer diameter and the outer shape of the measurement target pipe A measuring unit for measuring one;
Equipped with a,
The first moving part is disposed on the front side and the rear side along the longitudinal direction of the first pipe, and is disposed so as to surround the periphery of the cross section in a direction substantially perpendicular to the longitudinal direction of the first pipe. A first front moving body and a rear moving body that move along the longitudinal direction of the first pipe while sandwiching the periphery thereof via an elastic member, and the first front moving body and the rear moving body. And a first connecting member that connects them so that the positional relationship is maintained constant,
The second moving part is disposed so as to surround a periphery of a cross section in a direction substantially perpendicular to the longitudinal direction of the second pipe disposed on the front side and the rear side along the longitudinal direction of the second pipe. A second front side moving body and a rear side moving body that move along the longitudinal direction of the second pipe while sandwiching the periphery thereof via an elastic member; and the second front side moving body and the rear side moving body. And a second connecting member for connecting them so that the positional relationship is maintained constant,
The support member, as described above the first moving part positional relationship between the second moving part is maintained constant, characterized in that to connect with said second connecting member and the first connecting member A measuring device. The first moving unit is configured to sandwich the periphery of the first moving part via a wheel having a connection spring disposed so as to surround the periphery of a cross section in a direction substantially perpendicular to the longitudinal direction of the first pipe. Move along the length of the pipe,
The second moving unit is configured to sandwich the periphery of the second moving portion via a wheel having a connection spring disposed so as to surround the periphery of the cross section in a direction substantially perpendicular to the longitudinal direction of the second pipe. It moves along the longitudinal direction of piping. The measuring device according to claim 1 characterized by things. The measurement device according to claim 1, wherein the measurement unit is a 3D laser scanner device. The measuring unit includes a first measuring unit that measures at least one of an outer diameter and an outer shape of the pipe to be measured from the first moving unit side, and the first measuring unit from the second moving unit side. A second measuring unit that measures at least one of an outer diameter and an outer shape of the pipe to be measured so as to partially overlap the measurement position of
The measurement apparatus is configured to measure the piping to be measured over a wider range than the measurement result of the first measurement unit based on the measurement result of the first measurement unit and the measurement result of the second measurement unit. The measuring device according to any one of claims 1 to 3, further comprising an arithmetic device that calculates a measurement result of at least one of an outer diameter and an outer shape. The alarm part which issues a warning according to the remaining life calculated based on the measurement result of at least one of the outer diameter and the outer shape of the pipe to be measured is further provided. The measuring device described in 1. The measurement target pipe, the first pipe and the second pipe, measuring device according to any one of claims 1 to 5, characterized in that a boiler tube provided inside the boiler. The support member is configured so that the positional relationship between the first moving unit and the second moving unit is constantly maintained at a position in a direction substantially perpendicular to a longitudinal direction of the measurement target pipe. measurement apparatus according to any one of claims 1 to 6, characterized in that for connecting the moving part and the second moving portion. A second measuring pipe extending across the first pipe on the opposite side of the measuring pipe and extending substantially parallel to the measuring pipe;
A third pipe extending across the second measurement target pipe on the opposite side of the first pipe and substantially parallel to the second measurement target pipe;
A third moving part guided by the third pipe and movable along the longitudinal direction of the third pipe;
A second support member connecting the first moving unit and the third moving unit so that the positional relationship between the first moving unit and the third moving unit is maintained constant;
Supported by the second support member and moved together with the first moving unit, the third moving unit and the second support member, and at each point in the longitudinal direction of the second measurement target pipe, measurement apparatus according to any one of claims 1 to 7 and the third measurement unit for measuring at least one of the outer diameter and the outer shape of the second measurement target pipe, characterized in that it further comprises to. A measurement method for measuring at least one of an outer diameter and an outer shape of a pipe to be measured,
A first pipe extending substantially parallel to the measurement target pipe, and a second pipe extending across the measurement target pipe and substantially parallel to the measurement target pipe on the opposite side of the first pipe, respectively. A first moving part guided by a pipe and movable along the longitudinal direction of the first pipe, and a second moving part guided by the second pipe and movable along the longitudinal direction of the second pipe Is provided so that the positional relationship between the first moving unit and the second moving unit is maintained constant,
The first moving part is disposed on the front side and the rear side along the longitudinal direction of the first pipe, and is disposed so as to surround the periphery of the cross section in a direction substantially perpendicular to the longitudinal direction of the first pipe. A first front moving body and a rear moving body that move along the longitudinal direction of the first pipe while sandwiching the periphery thereof via an elastic member, and the first front moving body and the rear moving body. And a first connecting member that connects them so that the positional relationship is maintained constant,
The second moving part is disposed so as to surround a periphery of a cross section in a direction substantially perpendicular to the longitudinal direction of the second pipe disposed on the front side and the rear side along the longitudinal direction of the second pipe. A second front side moving body and a rear side moving body that move along the longitudinal direction of the second pipe while sandwiching the periphery thereof via an elastic member; and the second front side moving body and the rear side moving body. And a second connecting member for connecting them so that the positional relationship is maintained constant,
At least one of an outer diameter and an outer shape of the measurement target pipe is measured at each point in the longitudinal direction of the measurement target pipe by the measurement unit that moves together with the first movement unit and the second movement unit. Measuring method. The measurement target pipe is any one of three or more pipes arranged substantially parallel to each other, and the first pipe and the second pipe are among the three or more pipes. It is piping adjacent to the said measurement object piping. The measuring method of Claim 9 characterized by the above-mentioned. The measurement method according to claim 10 , wherein the three or more pipes are boiler tubes provided inside the boiler.

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