JP2019190830A - Outer diameter measuring device - Google Patents

Abstract

To provide an outer diameter measuring device for measuring the outer diameter of a pipe having a cylindrical shape.SOLUTION: The outer diameter measuring device comprises: a holding member having a pair of holding bodies provided facing each other so as to sandwich piping; a first light emitting unit that is fixed to one holding body and irradiates the other holding body with a first laser beam which is blocked partially by the piping; a first light receiving unit fixed to the other holding body so as to face the first light emitting unit across the piping and receiving the first laser beam that passes outside the piping; a second light emitting unit that is apart from the first light emitting unit by a predetermined mounting interval and emits a second laser beam a part of which is blocked by a portion opposite to the side of the piping in a radial direction that blocks the first laser beam; a second light receiving unit that is fixed in the same manner as the first light receiving unit and receives the second laser beam passing through the outside of the piping; and an outer diameter calculating unit that is provided on the holding member and calculates the outer diameter of the piping based on the first laser beam received by the first light receiving unit, the second laser beam received by the second light receiving unit, and the mounting interval between the first light emitting unit and the second light emitting unit.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an outer diameter measuring device.

  For example, a superheater or a reheater in a thermal power plant is composed of a boiler tube whose component is heat-resistant steel (for example, low alloy steel). If the boiler tube continues to be used at a high temperature exceeding the design standard, the outer peripheral surface of the boiler tube bulges or the wall thickness of the boiler tube decreases as the creep damage progresses. There is a risk of deterioration. Therefore, in order to prevent an accident caused by the deterioration of the boiler tube, the deterioration state of the boiler tube is periodically inspected, and the trend management such as the above-described bulging and thinning is performed. For example, when inspecting a boiler tube, a scaffold is installed inside the power generation boiler, and the operator visually checks the deterioration state of the outer peripheral surface of the boiler tube while passing through the scaffold. Only the outer diameter (representative point) at an arbitrary position of the diameter is measured using a caliper or a gauge, and trend management such as expansion and thinning of the boiler tube is performed based on these results.

JP2013-122411A

  However, when measuring the outer diameter of the boiler tube, since the operator manually measures, the working time per boiler tube becomes longer, and therefore, between the right and left cans of the boiler for power generation. It becomes difficult to measure the outer diameter of all the boiler tubes arranged side by side, and there is a possibility that accurate trend management cannot be performed.

  Accordingly, an object of the present invention is to provide an outer diameter measuring device that accurately measures the outer diameter of a boiler tube in a relatively short time.

  The main present invention for solving the above-mentioned problems is an outer diameter measuring device for measuring the outer diameter of a pipe having a cylindrical shape, and a holding member having a pair of holding bodies provided facing each other so as to sandwich the pipe. , A first light emitting unit that irradiates a first laser beam that is fixed to one of the holding bodies and that is partially blocked by the pipe toward the other holding body, and the first sandwiching the pipe. A first light receiving portion that is fixed to the other holding body so as to face the light emitting portion and receives the first laser light passing through the outside of the pipe, and a predetermined attachment interval from the first light emitting portion. A second laser beam that is fixed to one of the holding bodies and that is partially blocked by a portion of the pipe that is radially opposite to the side blocking the first laser light toward the other holding body. A second light emitting unit for irradiation, and the first light emitting unit sandwiching the pipe A second light receiving portion that is fixed to the other holding body so as to face the light emitting portion, and that receives the second laser light passing through the outside of the pipe, and is provided on the holding member; Based on the first laser beam to be received, the second laser beam to be received by the second light receiving unit, and the mounting interval between the first light emitting unit and the second light emitting unit, the outside of the pipe An outer diameter calculating unit for calculating a diameter.

  Other features of the present invention will become apparent from the accompanying drawings and the description of this specification.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the outer diameter measuring apparatus which measures the outer diameter of piping correctly in a short time.

It is a figure which shows the whole structure of the thermal power plant in which the outer diameter measuring apparatus which concerns on 1st Embodiment is used. It is a perspective view which shows an example of the outer diameter measuring apparatus which concerns on 1st Embodiment. It is a top view showing an example which looked at an outside diameter measuring device concerning a 1st embodiment from the -X direction side. It is a top view which shows an example which looked at the outer diameter measuring device which concerns on 1st Embodiment from the + Z direction side. It is a top view which shows an example which looked at the outer diameter measuring device which concerns on 1st Embodiment from the + Y direction side. It is a schematic perspective view which shows the path | route of the laser beam of the outer diameter measuring apparatus which concerns on 1st Embodiment. It is a schematic plan view which shows the path | route of the laser beam of the outer diameter measuring apparatus which concerns on 1st Embodiment. It is a figure which shows an example of the hardware constitutions of the calculation apparatus of the outer diameter measuring apparatus which concerns on 1st Embodiment. It is a figure which shows an example of the software structure of the calculation apparatus of the outer diameter measuring apparatus which concerns on 1st Embodiment. It is the schematic which shows the calculation basis in the calculation apparatus of the outer diameter measuring apparatus which concerns on 1st Embodiment. It is a flowchart which shows the calculation process of the outer diameter measuring apparatus which concerns on 1st Embodiment. It is a perspective view which shows an example of the outer diameter measuring apparatus which concerns on other embodiment. It is a schematic plan view which shows the path | route of the laser beam of the outer diameter measuring apparatus which concerns on other embodiment. It is a perspective view which shows an example of the outer diameter measuring apparatus which concerns on other embodiment.

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

=== Overall configuration of thermal power plant ===
FIG. 1 is a diagram illustrating an overall configuration of a thermal power plant in which the outer diameter measuring apparatus according to the first embodiment is used. The overall configuration of the thermal power plant shown in FIG. 1 is an example for easily understanding the explanation of the outer diameter measuring device, and the boiler tube 13 in the thermal power plant having a configuration different from the thermal power plant of FIG. On the other hand, an outer diameter measuring device can also be applied.

  As shown in FIG. 1, the thermal power plant 1 includes a boiler 2, a steam generator 3, a water cooling wall 4, a steam valve 5, a high pressure turbine 6, an intermediate pressure turbine 7, a low pressure turbine 8, a reheater 9, and a condenser. 10, the feed water pump 11 and the generator 12 are comprised.

  The boiler 2 is a heat exchange device that mixes fuel (for example, pulverized coal) supplied from the outside and air to generate combustion gas, and uses water of the combustion gas to change water to steam. The boiler 2 contains a steam generator 3, a water cooling wall 4, and a reheater 9. The steam generator 3 includes a economizer (not shown) that preheats water supplied from the condenser 10, and a superheater (not shown) that further heats the saturated steam supplied from the water cooling wall 4 to superheated steam. ) And. The water cooling wall 4 forms the housing of the boiler 2 and supplies the preheated water as saturated steam to the superheater. The steam valve 5 is an adjustment valve that controls the flow rate of superheated steam generated by the steam generator 3.

  The rotary shafts of the high pressure turbine 6, the intermediate pressure turbine 7, and the low pressure turbine 8 are the same and are coupled to the rotary shaft of the generator 12. Superheated steam (first steam) generated by the steam generator 3 is supplied to the high-pressure turbine 6 via the steam valve 5. The high-pressure turbine 6 expands the first steam and supplies the expanded steam (second steam) to the reheater 9 in the boiler 2. The reheater 9 reheats the second steam and supplies it to the intermediate pressure turbine 7 as reheated steam (third steam). The intermediate pressure turbine 7 expands the third steam and supplies the expanded steam (fourth steam) to the low pressure turbine 8. The low pressure turbine 8 expands the fourth steam.

  The condenser 10 condenses the exhaust gas after the low-pressure turbine 8 expands the fourth steam and converts it into condensate. The feed water pump 11 boosts the condensate generated by the condenser 10 and returns it to the steam generator 3 in the boiler 2 as feed water. Then, the generator 12 is driven by the power generated when the fourth steam expands so that electric power is generated.

  The steam generator 3 and the reheater 9 are configured to include a boiler tube 13 (piping) for circulating steam. For example, about 100 boiler tubes 13 form the boiler 2 in the right and left cans of the housing. Are arranged at substantially equal intervals. When the boiler tube 13 deteriorates due to thermal fatigue or the like, a part of the boiler tube 13 swells or thins. The outer diameter measuring devices 100, 200, and 300 are devices for grasping the deterioration state by measuring the outer diameter of the boiler tube 13.

=== Configuration of Outer Diameter Measuring Device 100 According to First Embodiment ===
The configuration of the outer diameter measuring apparatus 100 will be described with reference to FIGS. 2 to 7, the direction along the alignment direction of the plurality of boiler tubes 13 is shown as an X axis (X direction), and the direction along the axial direction of each of the plurality of boiler tubes 13 is a Y axis (Y direction). The direction orthogonal to the XY plane formed by the X axis and the Y axis is indicated as the Z axis (Z direction). Further, the direction along the XZ plane formed by the X axis and the Z axis may be described as the diameter direction. Moreover, the boiler tube 13 measured with the outer diameter measuring device 100 assumes a cylindrical shape, and is formed using a low alloy rope as heat-resistant steel.

  The outer diameter measuring device 100 is a device that measures the outer diameter of the boiler tube 13 by accommodating the boiler tube 13 in a predetermined region.

  FIG. 2 is a perspective view showing an example of the outer diameter measuring apparatus 100 according to the first embodiment. As shown in FIG. 2, the outer diameter measuring apparatus 100 includes a holding member 110, a first light emitting unit 120, a first light receiving unit 130, a second light emitting unit 140, a second light receiving unit 150, and a first mirror. 160, the 2nd mirror 170, and the outer-diameter calculation apparatus 180 are comprised.

  The holding member 110 fixes the first light emitting unit 120, the first light receiving unit 130, the second light emitting unit 140, and the second light receiving unit 150, and has an external shape in which the operator can easily press the outer diameter measuring device 100 against the boiler tube 13. It is the member which forms. As shown in FIG. 2, for example, the holding member 110 includes a pair of holding bodies 112 provided to face each other so as to form an area for housing the boiler tube 13, a holding body 113 held by an operator, and a boiler tube. And a guide portion 114 against which 13 is pressed. Further, the guide unit 114 includes a guide roller 114 a that contacts the peripheral surface of the boiler tube 13 when rotating on the peripheral surface of the boiler tube 13.

  Hereinafter, the holding member 110 will be described more specifically. FIG. 3 is a plan view showing an example of the outer diameter measuring apparatus 100 as viewed from the −X direction side. FIG. 4 is a plan view showing an example of the outer diameter measuring apparatus 100 as viewed from the + Z direction side. As shown in FIGS. 2 to 4, the holding body 113 may be in a shape that allows the operator to grip, and extends in the + Z direction from the central portion of the middle wall 111 having a plate shape. As shown in FIG. 2, a pair of holding bodies 112 are extended in the −Z direction from a surface of the inner wall 111 opposite to the surface to which the grip body 113 is connected. One holding body 112 a extends in the −Z direction with respect to the middle wall 111 from one peripheral edge of the middle wall 111. The other holding body 112 b extends in the −Z direction with respect to the middle wall 111 from the other circumferential edge opposite to the one circumferential edge of the middle wall 111. Thereby, the area | region which accommodates the boiler tube 13 is formed between the one holding body 112a and the other holding body 112b. The thickness in the X direction of the pair of holding bodies 112 may be any thickness that can accommodate the first light emitting unit 120, the second light emitting unit 140, the first light receiving unit 130, and the second light receiving unit 150.

  FIG. 5 is a plan view showing an example of the outer diameter measuring apparatus 100 as viewed from the + Y direction side. The guide portion 114 is a member for smoothly sliding the outer diameter measuring device 100 along the axial direction of the boiler tube 13 in a state where the outer diameter measuring device 100 is pressed against the boiler tube 13. The guide 114 is provided on the surface on the −Z direction side of the middle wall 111. Further, one guide portion 114 is provided at least on each of the end portion on the + Y direction side of the middle wall 111 and the end portion on the −Y direction side of the middle wall 111. Thereby, since the boiler tube 13 is stably hold | maintained along a Y-axis and an angle error can be suppressed when calculating an outer diameter, an outer diameter can be measured correctly. In addition, it is not limited above, The guide part 114 may be provided continuously from the edge part of the + Y direction side of the intermediate wall 111 to the edge part of the -Y direction side.

  Here, the guide roller 114a which comprises the guide part 114 is demonstrated. The guide roller 114 a is a member that guides the outer shape measuring device 100 mounted on the peripheral surface of the boiler tube 13 along the axial direction of the boiler tube 13 while rotating on the peripheral surface of the boiler tube 13. The guide roller 114 a contacts the circumferential surface on the + Z side of the boiler tube 13 along the axial direction of the boiler tube 13. Further, the guide roller 114 a has a curved surface in which the surface facing the peripheral surface of the boiler tube 13 is along the peripheral surface of the boiler tube 13. Thereby, since the outer diameter measuring apparatus 100 can be smoothly slid in the axial direction of the boiler tube 13, the working efficiency can be improved.

  In addition, the guide part 114 is not limited to the structure provided with the guide roller 114a. As an example, as shown in FIG. 12, a member having a pair of convex portions 214 a that press against one peripheral surface of the boiler tube 13 may be used.

  Next, the first light emitting unit 120, the first light receiving unit 130, the second light emitting unit 140, and the second light receiving unit 150 will be described with reference to FIGS.

  The 1st light emission part 120 is being fixed to one holding body 112a so that the peripheral surface by the side of the + X direction of the boiler tube 13 may be adjoined. The first light emitting unit 120 irradiates the first laser beam toward the axial direction (+ Y direction) of the boiler tube 13. The first mirror 160 is fixed to the holding body 112a on the + Y direction side from the first light emitting unit 120. The first mirror 160 is disposed in a state inclined by 45 degrees with respect to the optical axis of the first laser beam, whereby the first mirror 160 directs the first laser beam in the diameter direction (−X direction). Reflect.

  The first laser light reflected in the diameter direction by the first mirror 160 is blocked in the region on the + Z direction side in the boiler tube 13, and the first laser light that has passed outside the region is the second laser light. The mirror 170 is reached. Here, the second mirror 170 is inclined 45 degrees with respect to the optical axis of the first laser beam. Therefore, the first laser light is reflected in the axial direction (−Y direction) and is received by the first light receiving unit 130 fixed to the other holding body 112b so as to face the first light emitting unit 120. .

  The 2nd light emission part 140 is being fixed to one holding body 112a so that the peripheral surface by the side of the + X direction of the boiler tube 13 may be adjoined. Moreover, the 2nd light emission part 140 is provided in the 1st light emission part 120 with the predetermined attachment space | interval W across the clearance gap, for example. The attachment interval W is, for example, a distance from an end in the −Z direction of the first laser light emitted by the first light emitting unit 120 to an end in the + Z direction of the second laser light emitted by the second light emitting unit 140. The second light emitting unit 140 irradiates the second laser light in the axial direction (+ Y direction). Similar to the first laser light, the first mirror 160 reflects the second laser light directed in the axial direction in the diameter direction (−X direction).

  Part of the second laser light reflected in the diameter direction by the first mirror 160 is blocked in the region on the −Z direction side of the boiler tube 13. The second laser light that has passed outside the region on the −Z direction side in the boiler tube 13 is reflected by the second mirror 170 toward the axial direction (−Y direction). The second light receiving unit 150 fixed to the other holding body 112b so as to face the second light emitting unit 140 with the boiler tube 13 interposed therebetween is a second laser beam reflected by the second mirror 170 in the axial direction. Is received.

  Note that the mounting interval W between the first light emitting unit 120 and the second light emitting unit is narrower than the diameter of the boiler tube 13, and the + Z direction side edge of the first laser light and the −Z direction side edge of the second laser light. The first light emitting unit 120 and the second light emitting unit are disposed so that the distance of the first laser beam is larger than the diameter of the boiler tube 13, and thus, as described above, each of the first laser beam and the second laser beam is arranged. The outer diameter measuring device 100 can be installed on the boiler tube 13 such that a part of the outer diameter measuring device 100 is blocked by the boiler tube 13.

  The first light emitting unit 120 only needs to irradiate the above-described first laser light, and the second light emitting unit 140 only needs to irradiate the above-described second laser light, and the specifications thereof are limited. Is not to be done.

  Further, as described above, the first light emitting unit 120 and the second light emitting unit 120 are smaller than one light emitting unit, rather than being configured to irradiate laser light exceeding the outer diameter of the boiler tube 13 with one light emitting unit. The outer diameter measuring device 100 can be downsized by providing the light emitting units 140 with a predetermined mounting interval W therebetween. In addition, the transmission / reception device including the first light emitting unit 120 and the first light receiving unit 130 and the transmission / reception device including the second light emitting unit 140 and the second light receiving unit 150 may be the same device or different devices. May be. For example, as shown in FIG. 2, the first light emitting unit 120 and the first light receiving unit 130 may be smaller than the second light emitting unit 130 and the second light receiving unit 140.

  The first light emitting unit 120 and the second light emitting unit 140 are fixed to one holding body 112a, and the first light receiving unit 130 and the second light receiving unit 150 are fixed to the other holding body 112b so as to face each other. However, the present invention is not limited to this. The first light emitting unit 120 and the second light receiving unit 150 may be fixed to one holding body 112a, and the second light emitting unit 140 and the first light receiving unit 130 may be fixed to the other holding body 112b.

  Further, as described above, by providing the first mirror 160 and the second mirror 170, as shown in FIG. 2, even when the irradiated portion is provided on the end face of the vertically long rectangular parallelepiped, the + Y direction Since the 1st light emission part 120 and the 2nd light emission part 140 can be arrange | positioned so that it may light-emit toward, the width | variety of the X direction of the outer diameter measuring apparatus 100 can be reduced. Thereby, even if the space | interval of the adjacent boiler tubes 13 is narrow, the outer diameter measuring apparatus 100 is applicable.

  Next, the outer diameter calculation device 180 that calculates the outer diameter of the boiler tube 13 based on the laser light received by the light receiving unit will be described.

  The outer diameter calculation device 180 includes first light receiving information of the first laser light received by the first light receiving unit 130, second light receiving information of the second laser light received by the second light receiving unit 150, and the first light emitting unit 120. This is a device for calculating the outer diameter of the boiler tube 13 based on the mounting interval W between the second light emitting unit 140 and the second light emitting unit 140. The outer diameter calculation device 180 is provided on the holding member 110, for example. More preferably, the display device 185 is provided so as to be adjacent to the grip body 113. Thereby, in a state where the operator presses the outer diameter measuring device 100 against the boiler tube 13, the numerical value indicating the outer diameter displayed on the display device 185 can be confirmed. Hereinafter, a hardware configuration and a software configuration of the outer diameter calculation device 180 will be described.

  FIG. 8 is a diagram illustrating an example of a hardware configuration of the outer diameter calculating device 180. As shown in FIG. 8, the hardware configuration of the outer diameter calculation device 180 includes a processor 181, a memory 182, a storage device 183, an input device 184, and a display device 185. The processor 181 is, for example, an MPU or a CPU. The memory 182 is, for example, RAM, ROM, NVRAM, or the like. The storage device 183 is, for example, a RAM, a ROM, an NVRAM, or the like, and stores various information necessary for the processor 181 to perform processing. For example, the storage device 183 stores information regarding the mounting interval W between the first light emitting unit 120 and the second light emitting unit 140. The input device 184 is a user interface that receives an operation input from a user, and is, for example, an operation input device (keyboard, mouse, touch panel, etc.), a voice input device (microphone, etc.), and the like. The display device 185 is a user interface that provides various types of information to the user. For example, the display device 185 is a display (liquid crystal monitor or the like), an audio output device (speaker or the like) as shown in FIG.

  FIG. 9 is a diagram illustrating an example of a software configuration of the outer diameter calculation device 180. The software configuration of the outer diameter calculation device 180 includes functions of an acquisition unit 180a and a calculation unit 180b. These functions are realized, for example, when the processor 181 of the outer diameter calculation device 180 reads and executes a program stored in the memory 182. Note that these functions may be realized by hardware such as ASIC, for example. The processor 181 may be realized by reading and executing a program stored in an external storage medium.

  FIG. 10 is a schematic diagram illustrating a calculation basis in the calculation device of the outer diameter measurement device 100. The functions of the acquisition unit 180a and the calculation unit 180b will be described with reference to FIG.

  The acquisition unit 180 a has a function of acquiring first light reception information from the first light receiving unit 130 and acquiring second light reception information from the second light receiving unit 150. The acquisition unit 180a transmits the acquired various types of information to the calculation unit 180b.

  The calculation unit 180b has a function of calculating the outer diameter of the boiler tube 13 based on the first light reception information, the second light reception information, and the attachment interval W. The calculating unit 180b may continuously calculate the outer diameter of the boiler tube 13 when the outer diameter measuring device 100 is moving along the axial direction of the boiler tube 13, or the outer diameter measuring device 100. When the operation is stopped, the outer diameter of the boiler tube 13 may be calculated.

  As shown in FIG. 10, a part of the first laser light having the first width L1 emitted from the first light emitting unit 120 is blocked in one region of the boiler tube 13 and passes outside the one region. The first laser beam having the third width L3 is received by the first light receiving unit 130. The second laser light having the second width L2 emitted from the second light emitting unit 140 is partially blocked at the other region of the boiler tube 13, and passes through the outside of the other region. The second light receiving unit 150 receives the second laser light having The calculation unit 180b receives information on the first laser beam having the third width L3 as the first light reception information and information on the second laser light having the fourth width L4 as the second light reception information.

  The calculation unit 180b calculates the first cutoff width S1 illustrated in FIG. 10 based on the first light reception information received from the first light reception unit 130. Further, the calculation unit 180b calculates the second cutoff width S2 illustrated in FIG. 10 based on the second light reception information received from the second light reception unit 150.

  Here, a method of calculating the first cutoff width S1 and the second cutoff width S2 will be described. The first blocking width S1 is calculated, for example, by calculating the time when the first laser beam is blocked by the boiler tube 13 based on the voltage obtained from the first laser beam received by the first light receiving unit 130. The Similarly, the second blocking width S2 is calculated by calculating the time when the second laser beam is blocked by the boiler tube 13 based on the voltage obtained from the second laser beam received by the second light receiving unit 150, for example. Is calculated. Alternatively, the length of the portion where the first laser beam and the second laser beam irradiated by the first light emitting unit 120 and the second light emitting unit 140 are blocked by the boiler tube 13 may be directly calculated by the CCD line sensor. .

  The calculation unit 180b calculates, for example, the sum of the first blocking width S1 (length information), the second blocking width S2 (length information), and the mounting interval W as the outer diameter of the boiler tube 13. Thereby, since the outer diameter of the boiler tube 13 will change, if the boiler tube 13 produces a swelling and thinning with creep damage, the change can be grasped | ascertained correctly.

=== Calculation Processing of Outer Diameter Measuring Device 100 ===
FIG. 11 is a flowchart showing a calculation procedure of the outer diameter measuring apparatus 100. The calculation process of the outer diameter measuring apparatus 100 will be described with reference to FIG.

  First, the operator attaches the outer diameter measuring device 100 to the boiler tube 13 to be measured.

  Next, the operator inputs an instruction signal for starting measurement of the outer diameter of the boiler tube 13 to the input device 184. Further, the operator holds the grip body 113 and moves it along the axial direction of the boiler tube 13 while pressing the guide roller 114 a against the peripheral surface of the boiler tube 13. When the instruction signal is input to the input device 184, the first light emitting unit 120 and the second light emitting unit 140 start emitting the first laser light and the second laser light (S10).

  Next, the first light receiving unit 130 and the second light receiving unit 150 receive the first laser beam and the second laser beam reflected by the first mirror 160 and the second mirror 170, respectively. The outer diameter calculation device 180 receives the first light receiving information from the first light receiving unit 130 and receives the second light receiving information from the second light receiving unit 150 (S11).

Next, as shown in FIG. 10, the outer diameter calculation device 180 calculates the first cutoff width S1 (L1-L3) based on the first light reception information, and the second cutoff width S2 based on the second light reception information. (L2-L4) is calculated. The outer diameter calculation device 180 calculates the outer diameter of the boiler tube 13 according to the formula (1) based on the first blocking width S1, the second blocking width S2, and the mounting interval W stored in the storage device 183 in advance. (S12).
[Equation 1]
Outer diameter = (L1-L3) + (L2-L4) + W (1)

  And the outer diameter calculation apparatus 180 displays the outer diameter of the boiler tube 13 on a display (S13). An operator checks the numerical value displayed on the display and determines whether the boiler tube 13 has deteriorated.

=== Configuration of Outer Diameter Measuring Device 200 According to Second Embodiment ===
FIG. 12 is a perspective view showing an example of the outer diameter measuring apparatus 200 according to the second embodiment. FIG. 13 is a schematic diagram illustrating a path of laser light of the outer diameter measuring apparatus 200 according to the second embodiment. An outer diameter measuring apparatus 200 according to the second embodiment will be described with reference to FIGS. 12 and 13. However, the outer diameter measuring apparatus 200 according to the second embodiment is obtained by omitting the first mirror 160 and the second mirror 170 in the outer diameter measuring apparatus 100 according to the first embodiment. Accordingly, the outer diameter measuring device 200 is different in the portion irradiated by the first light emitting unit 120 and the second light emitting unit in the outer diameter measuring device 100 and the portion received by the first light receiving unit 130 and the second light receiving unit 150. . In the following, only the components different from the outer diameter measuring apparatus 100 according to the first embodiment will be described. In addition, although the guide roller 114a (refer FIG. 2) is not used for the guide part 214, you may have the guide roller 114a (refer FIG. 2).

  As shown in FIG. 12, the 1st light emission part 220 is being fixed to one holding body 212a. As illustrated in FIG. 13, the first light emitting unit 220 irradiates the first laser light in the −X direction. The first light receiving unit 230 is fixed to another holding unit so as to face the first light emitting unit 220 along the X axis. Thereby, since the 1st mirror 160 and the 2nd mirror 170 can be abbreviate | omitted, the manufacturing cost of the outer diameter measuring apparatus 200 can be reduced.

=== Configuration of Outer Diameter Measuring Device 300 According to Third Embodiment ===
FIG. 14 is a perspective view showing an example of the outer diameter measuring apparatus 300 according to the third embodiment. The outer diameter measuring apparatus 300 according to the third embodiment will be described with reference to FIG. In the following, only the components different from the outer diameter measuring apparatus 100 according to the first embodiment will be described.

  As shown in FIG. 14, in the outer diameter measuring apparatus 300 according to the third embodiment, one holding body 312a has a third mirror 360a that reflects the first laser light emitted in the + Y direction in the −X direction, A third mirror 360a and a fifth mirror 360c provided with a mounting interval W between the first light emitting unit 320 and the second light emitting unit 340 and reflecting the second laser light emitted in the + Y direction in the -X direction, respectively. Is provided. The other holding body 312b includes a fourth mirror 360b that reflects the first laser light traveling straight in the −X direction in the −Y direction so that the first light receiving unit 330 can receive the first laser light, and a second light receiving light. The second laser beam that travels straight in the −X direction and that is provided with the fourth mirror 360b and at least the mounting interval W between the first light emitting unit 320 and the second light emitting unit 340 so that the unit 350 can receive the second laser beam. And a sixth mirror 360d that reflects in the -Y direction may be provided. Thereby, since a mirror can be reduced in size, the manufacturing cost of the outer diameter measuring apparatus 300 can be reduced.

=== Summary ===
As described above, the outer diameter measuring apparatus 100 according to the present embodiment is an outer diameter measuring apparatus that measures the outer diameter of a cylindrical boiler tube 13, and is provided so as to face the boiler tube 13. A holding member 110 having a pair of holding bodies 112 and a first laser beam that is fixed to one holding body 112a and irradiates a first laser beam that is partially blocked by the boiler tube 13 toward the other holding body. 1st light-emitting part 120 and the 1st laser beam which are fixed to the other holding body 112b so that it may oppose the 1st light-emitting part 120 on both sides of the boiler tube 13, and pass the outer side (+ Z direction side) of the boiler tube 13 are received. The first light receiving unit 130 and the first light emitting unit 120 are fixed to one holding body 112a with a mounting interval W therebetween, and the first of the boiler tube 13 is directed toward the other holding body 112b. The second light emitting unit 140 that emits the second laser light that is partially blocked by the portion opposite to the laser beam in the radial direction, and the second light emitting unit 140 across the boiler tube 13. The second light receiving unit 150 is fixed to the other holding body 112b and receives the second laser light passing through the outside (−Z direction side) of the boiler tube 13, and the holding member 110. The outer diameter calculation device 180 (the outer diameter calculation) calculates the outer diameter of the boiler tube 13 based on the first laser beam received by the second laser beam, the second laser beam received by the second light receiving unit 150, and the mounting interval W. Part). According to the present embodiment, it is possible to provide the outer diameter measuring devices 100, 200, and 300 that accurately measure the outer diameter of the boiler tube 13 in a short time.

  Moreover, in the outer diameter measuring apparatus 100 according to the present embodiment, the first light emitting unit 120 is disposed so as to irradiate the first laser light in the axial direction of the boiler tube 13, and the second light emitting unit 140 is disposed in the boiler tube 13. The first laser light emitted from the first light emitting unit 120 is reflected toward the diameter direction (−X direction) of the boiler tube 13 to emit second light. The second laser beam emitted from the section 140 is reflected in the diameter direction (−X direction) of the boiler tube 13, and is reflected by the first mirror 160 fixed to one holding body 112 a and the first mirror 160. The first laser beam is reflected in the axial direction of the boiler tube 13 so as to be received by the first light receiving unit 130, and the second laser beam reflected by the first mirror 160 is directed in the axial direction of the boiler tube 13. The second light receiving unit 150 is reflected to be received, further comprising a second mirror 170 that is fixed to the other of the holding member 112b, the. According to the present embodiment, when using a laser device in which a portion to be irradiated is provided on the end face of a vertically long rectangular parallelepiped, the first light emitting unit 120 and the second light emitting unit 140 can be arranged to emit light in the + Y direction. Therefore, the width in the X direction of the outer diameter measuring apparatus 100 can be reduced.

  Further, in the outer diameter measuring apparatus 300 according to the present embodiment, the first light emitting unit 320 is disposed so as to irradiate the first laser light in the axial direction of the boiler tube 13, and the second light emitting unit 340 is disposed in the boiler tube 13. The first laser light irradiated by the first light emitting unit 320 is reflected toward the diameter direction (−X direction) of the boiler tube 13, and is arranged so as to irradiate the second laser light in the axial direction. The third mirror 360a fixed to the holding body 312a, and the first laser beam reflected by the third mirror 360a is reflected toward the axial direction of the boiler tube 13 so that the first light receiving unit 330 can receive the other laser beam. A fourth mirror 360b fixed to the holder 312b, and a third mirror 360a that reflects the second laser light emitted by the second light emitting unit 340 toward the diameter of the boiler tube 13; At least a fifth mirror 360c fixed to one holding body 312a with a gap between the first light emitting unit 320 and the second light emitting unit 340, and the second laser light reflected by the fifth mirror 360c are second received. The first part 350 is fixed to the other holding body 312b with a gap between the fourth mirror 360b and at least the first light emitting part 320 and the second light emitting part 340, which reflects in the axial direction of the boiler tube 13 so as to receive light. 6 mirrors 360d. According to the present embodiment, since the mirror can be reduced in size, the manufacturing cost of the outer diameter measuring device 300 can be reduced.

  In addition, the holding member 110 in the outer diameter measuring apparatus 100 according to the present embodiment includes a grip body 113 that a person grips. According to the present embodiment, the operability of the outer diameter measuring devices 100, 200, 300 is improved.

  In addition, the holding member 110 in the outer diameter measuring device 100 according to the present embodiment includes a guide portion 114 that contacts the peripheral surface of the boiler tube 13 in a state where the boiler tube 13 is accommodated between a pair of holding bodies. . According to this embodiment, since the boiler tube 13 does not shift between the holding bodies 112, the angle error can be suppressed, so that the calculation accuracy of the outer diameter can be improved.

  Moreover, the guide part 114 in the outer diameter measuring apparatus 100 according to the present embodiment has a plurality of guide rollers 114 a that rotate on the peripheral surface of the boiler tube 13. According to this embodiment, since the outer diameter measuring device 100 can be smoothly slid in the axial direction of the boiler tube 13, the working efficiency can be improved.

  Moreover, the external shape calculation apparatus of the outer diameter measuring apparatus 100 according to the present embodiment includes a display device 185 that displays the calculated outer diameter of the boiler tube 13. According to the present embodiment, since the operator can easily check the measured outer diameter, work efficiency can be improved.

  In addition, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof. The measurement target pipes of the outer diameter measuring devices 100, 200, and 300 include not only boiler tubes but also cylindrical pipes whose outer diameters change due to external factors.

DESCRIPTION OF SYMBOLS 100 Outer diameter measuring device 110 Holding member 112 Holding body 112a One holding body 112b The other holding body 113 Grasping body 114 Guide part 114a Guide roller 120 1st light emission part 130 1st light reception part 140 2nd light emission part 150 2nd light reception part 160 1st mirror 170 2nd mirror 180 Outer diameter calculation device 360a 3rd mirror 360b 4th mirror 360c 5th mirror 360d 6th mirror

Claims (7)

An outer diameter measuring device that measures the outer diameter of a pipe having a cylindrical shape,
A holding member having a pair of holding bodies provided facing each other so as to sandwich the pipe;
A first light emitting unit that irradiates a first laser beam that is fixed to one of the holding bodies and that is partially blocked by the pipe toward the other holding body;
A first light-receiving unit that receives the first laser light that is fixed to the other holding body so as to face the first light-emitting unit across the pipe and that passes through the outside of the pipe;
A portion that is fixed to one of the holding bodies with a predetermined mounting interval from the first light emitting unit, and that is opposite to the side of the pipe that blocks the first laser light toward the other holding body. A second light emitting unit for irradiating a second laser beam partially blocked by
A second light-receiving unit that is fixed to the other holding body so as to face the second light-emitting unit across the pipe and receives the second laser light that passes outside the pipe;
The first laser beam received by the first light receiving unit, the second laser beam received by the second light receiving unit, the first light emitting unit, and the second light emitting unit provided on the holding member Based on the mounting interval, an outer diameter calculating unit that calculates an outer diameter of the pipe,
An outer diameter measuring device comprising: The first light emitting unit is arranged to irradiate the first laser light in the axial direction of the pipe,
The second light emitting unit is arranged to irradiate the second laser light in the axial direction of the pipe,
The first laser light emitted from the first light emitting part is reflected toward the diameter direction of the pipe, and the second laser light emitted from the second light emitting part is reflected toward the diameter direction of the pipe. A first mirror fixed to the one holding body;
The first laser beam reflected by the first mirror is reflected so that the first light receiving portion can receive light in the axial direction of the pipe, and the second laser light reflected by the first mirror is reflected by the pipe. A second mirror fixed to the other holding body, wherein the second light receiving part reflects the second light receiving part so as to receive light,
The external shape measuring apparatus according to claim 1, further comprising: The first light emitting unit is arranged to irradiate the first laser light in the axial direction of the pipe,
The second light emitting unit is arranged to irradiate the second laser light in the axial direction of the pipe,
A third mirror that is fixed to the one holding body and reflects the first laser light emitted by the first light emitting unit toward the diameter of the pipe;
A fourth mirror fixed to the other holding body that reflects the first laser light reflected by the third mirror toward the axial direction of the pipe so that the first light receiving unit can receive the first laser light;
A fifth mirror that reflects the second laser light emitted from the second light emitting unit toward the diameter of the pipe and is fixed to the one holding body with a predetermined gap from the third mirror. When,
The second laser beam reflected by the fifth mirror is reflected toward the axial direction of the pipe so that the second light receiving unit can receive the second laser beam, and the other mirror is held with a predetermined gap from the fourth mirror. A sixth mirror fixed to the body;
The external shape measuring apparatus according to claim 1, further comprising: The outer diameter measuring device according to any one of claims 1 to 3, wherein the holding member includes a gripping body to be gripped by a person. The said holding member has a guide part which contacts the surrounding surface of the said piping in the state in which the said piping is accommodated between the said pair of holding bodies, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. The outer diameter measuring device according to one item. The outer diameter measuring device according to any one of claims 1 to 5, wherein the guide unit includes a plurality of guide rollers that rotate on a peripheral surface of the pipe. The outer diameter measurement device according to any one of claims 1 to 6, wherein the outer shape calculation unit includes a display unit that displays the calculated outer diameter of the pipe.