JP2015137852A - Tube hole position measurement method - Google Patents

Tube hole position measurement method Download PDF

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JP2015137852A
JP2015137852A JP2014007715A JP2014007715A JP2015137852A JP 2015137852 A JP2015137852 A JP 2015137852A JP 2014007715 A JP2014007715 A JP 2014007715A JP 2014007715 A JP2014007715 A JP 2014007715A JP 2015137852 A JP2015137852 A JP 2015137852A
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tube
hole
light receiving
plate
laser light
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JP6238008B2 (en
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延之 出頭
Nobuyuki Degashira
延之 出頭
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IHI Corp
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IHI Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a tube hole position measurement method capable of simply and highly accurately measuring a relative deviation amount of each tube hole of a tube plate and a tube support plate.SOLUTION: A laser oscillator 11 is installed at a hole inlet 4b of a tube hole 4a of a tube plate 4. A laser receiver 13 is installed at a hole outlet 4c of the tube hole 4a of the tube plate 4. A laser beam L is irradiated at a light receiving center of the laser receiver 13 from the laser oscillator 11 making an irradiation center match a center of the hole inlet 4b in the tube hole 4a of the tube plate 4 so that an optical axis is made to match the center axis of the tube hole 4a of the tube plate 4. The laser receiver 13 is isolated from the tube hole 4a of the tube plate 4. Next, the laser beam L is irradiated to the laser receiver from the laser oscillator 11 in a state that the laser receiver is inserted into a tube hole 5a of a tube support plate 5 and its light receiving center is located on the center axis of the tube hole 5a of the tube support plate 5, and a deviation amount between the light receiving center of the laser receiver and an actual laser beam reception position is measured by irradiating the laser beam L to the laser receiver from the laser oscillator 11.

Description

本発明は、熱交換器の管板及びこの管板に間隔をおいて対向する管支持板の互いに同軸上に位置する伝熱管支持用の管孔同士の位置ずれ量を計測するのに用いられる管孔位置計測方法に関するものである。   INDUSTRIAL APPLICABILITY The present invention is used to measure the amount of misalignment between heat transfer tube support tube holes located on the same axis of a tube plate of a heat exchanger and a tube support plate facing the tube plate with a space therebetween. The present invention relates to a tube hole position measuring method.

上記した熱交換器としては、例えば、ボイラの後部伝熱部を構成する過熱器がある。
この過熱器は、容器と、この容器内に収容された複数本の伝熱管と、管板と、管支持板を備えている。 As the heat exchanger described above, for example, there is a superheater that constitutes a rear heat transfer section of a boiler.
The superheater includes a container, a plurality of heat transfer tubes accommodated in the container, a tube plate, and a tube support plate.

管板は、容器の端部に位置しており、伝熱管の端部を挿入して支持する伝熱管支持用の管孔を複数有している。一方、管支持板は、伝熱管の中間部分を支えるものであり、管板と同じく伝熱管支持用の管孔を複数有していて、容器内において互いに間隔をもって複数枚配置されている。   The tube plate is located at the end of the container and has a plurality of heat transfer tube support tube holes for inserting and supporting the end of the heat transfer tube. On the other hand, the tube support plate supports an intermediate portion of the heat transfer tube, and has a plurality of tube holes for supporting the heat transfer tube, like the tube plate, and a plurality of tubes are arranged at intervals in the container.

管板や互いに間隔をもって配置された複数枚の管支持板に伝熱管支持用の管孔を形成する場合には、例えば、特許文献１に記載されているように、管板及び所定の間隔をおいて設置した複数枚の管支持板に、長尺のドリルによって長手方向通しの（同軸の）管孔をそれぞれ形成する手法が採用される。   When forming tube holes for supporting a heat transfer tube in a tube plate or a plurality of tube support plates arranged at intervals from each other, for example, as described in Patent Document 1, the tube plate and a predetermined interval are set. A method is employed in which a plurality of longitudinally extending (coaxial) tube holes are formed in a plurality of tube support plates installed in a longitudinal direction by a long drill.

このように、管板及び所定の間隔をおいて設置した複数枚の管支持板に、長尺のドリルで一度に管孔を形成する場合には、ドリルの撓み等によって管板及び複数枚の管支持板の互いに同軸上に位置する管孔同士が相対的にずれてしまう虞がある。特に、板厚が他の管支持板よりも大きい管板の場合には、この管板の管孔の中心軸が傾いていると、隣接する管支持板の管孔に伝熱管を挿入することができなかったり、例え管孔に挿入できたとしても伝熱管が偏った状態で支持されたりする虞がある。   Thus, when a tube hole is formed at a time with a long drill in the tube plate and a plurality of tube support plates installed at a predetermined interval, the tube plate and the plurality of sheets are There is a possibility that the tube holes located on the same axis of the tube support plate are relatively displaced from each other. In particular, in the case of a tube plate having a plate thickness larger than that of other tube support plates, if the central axis of the tube hole of this tube plate is inclined, the heat transfer tube is inserted into the tube hole of the adjacent tube support plate. However, even if the heat transfer tube can be inserted into the tube hole, the heat transfer tube may be supported in a biased state.

そこで、管板及び複数の管支持板に管孔を形成した後に、管板の管孔の中心軸と、これに隣接する管支持板の管孔の中心軸とのずれ量を計測する必要があり、従来にあっては、例えば、伝熱管と同じ径の棒状の治具を管板の管孔に挿入して、この治具の先端を管板と対向する隣の管支持板の近傍まで移動させ、治具の先端と管支持板の管孔における中心軸とのずれ量をスケール等で計測する方法が採用されている（特許文献１参照）。   Therefore, after forming the tube holes in the tube plate and the plurality of tube support plates, it is necessary to measure the deviation amount between the center axis of the tube hole of the tube plate and the center axis of the tube hole of the adjacent tube support plate. Yes, in the past, for example, a rod-shaped jig of the same diameter as the heat transfer tube is inserted into the tube hole of the tube plate, and the tip of this jig is close to the adjacent tube support plate facing the tube plate A method is adopted in which the amount of displacement between the tip of the jig and the central axis of the tube hole of the tube support plate is measured with a scale or the like (see Patent Document 1).

特開2010-284684号公報JP 2010-284684 A

しかしながら、上記した棒状の治具を用いた計測方法では、治具の先端と管支持板の管孔における中心軸とのずれ量をスケール等で計測する都合上、長尺の治具が扱いづらい分だけ多大な手間暇を必要とするうえ、高精度の計測が望めないという問題があり、これらを解決することが従来の課題となっている。   However, in the measurement method using the rod-shaped jig described above, it is difficult to handle a long jig for the purpose of measuring the deviation between the tip of the jig and the central axis of the tube hole of the tube support plate with a scale or the like. There is a problem that much time and effort are required and high-precision measurement cannot be expected, and solving these problems is a conventional problem.

本発明は、上記した従来の課題に着目してなされたもので、管板及びこれに隣接する管支持板にそれぞれ形成された互いに同軸上に位置する管孔の相対的な位置ずれ量を簡単且つ高精度に計測することが可能になる管孔位置計測方法を提供することを目的としている。   The present invention has been made by paying attention to the above-described conventional problems, and it is possible to easily calculate the relative displacement amount of the tube holes formed on the tube plate and the tube support plate adjacent thereto. It is another object of the present invention to provide a tube hole position measuring method capable of measuring with high accuracy.

上記した目的を達成するべく、本発明の第１の態様は、複数本の伝熱管と、前記複数本の伝熱管の各端部を挿入して支える複数の管孔を有する管板と、前記管板に間隔をおいて対向配置されて前記複数本の伝熱管の各中間部分を挿入して支える管孔を有する管支持板と、を備えた熱交換器の前記管板及び前記管支持板の互いに同軸上に位置する管孔同士の位置ずれ量を計測する管孔位置計測方法であって、前記管支持板よりも厚さ寸法の大きい前記管板の管孔における前記管支持板とは反対側の孔入口にレーザ光照射手段を設置すると共に、前記管板の管孔における前記管支持板側の孔出口にレーザ光受光手段を設置して、該レーザ光受光手段の受光中心を前記管板の管孔における前記孔出口の中心に位置させるのに続いて、前記管板の管孔における前記孔入口の中心に照射中心を一致させた前記レーザ光照射手段から、前記レーザ光受光手段の受光中心に向けてレーザ光を照射して、前記レーザ光照射手段の光軸を前記管板の管孔における前記孔入口及び前記孔出口の各中心を結ぶ中心軸に一致させる光軸調整工程と、前記管板の管孔の前記孔出口から前記レーザ光受光手段を離間させるのに続いて、前記管支持板の管孔に前記レーザ光受光手段を挿入して、該レーザ光受光手段の受光中心を前記管支持板の管孔の中心軸上に位置させた状態で、光軸を前記管板の管孔における中心軸に一致させた前記レーザ光照射手段から前記レーザ光受光手段に向けてレーザ光を照射して、該レーザ光受光手段の受光中心と実際のレーザ光受信位置とのずれ量を計測する計測工程とを経る構成としている。   In order to achieve the above-mentioned object, the first aspect of the present invention includes a plurality of heat transfer tubes, a tube plate having a plurality of tube holes for inserting and supporting each end of the plurality of heat transfer tubes, A tube support plate having a tube hole which is arranged to be opposed to the tube plate at an interval and which supports each of the intermediate portions of the plurality of heat transfer tubes by inserting the tube plate, and the tube support plate of the heat exchanger. Is a tube hole position measuring method for measuring a displacement amount between tube holes positioned coaxially with each other, and the tube support plate in the tube hole of the tube plate having a thickness dimension larger than that of the tube support plate. A laser beam irradiating means is installed at the hole entrance on the opposite side, and a laser beam receiving means is installed at the hole outlet on the tube support plate side in the tube hole of the tube plate, and the light receiving center of the laser beam receiving means is the Following the positioning of the hole outlet of the tube sheet in the center of the hole outlet, the tube hole of the tube sheet A laser beam is irradiated from the laser beam irradiating means whose irradiation center coincides with the center of the hole entrance to the light receiving center of the laser beam receiving means, and the optical axis of the laser beam irradiating means is set to the tube plate An optical axis adjusting step for matching the center axis connecting the centers of the hole inlet and the hole outlet of the tube hole, and separating the laser light receiving means from the hole outlet of the tube hole of the tube plate In the state where the laser beam receiving means is inserted into the tube hole of the tube support plate and the light receiving center of the laser beam light receiving means is positioned on the center axis of the tube hole of the tube support plate, the optical axis is A laser beam is irradiated from the laser beam irradiation means aligned with the central axis in the tube hole of the tube plate toward the laser beam receiving means, and the light receiving center of the laser beam receiving means and the actual laser beam receiving position are Configuration through a measurement process that measures the amount of deviation It is.

本発明に係る管孔位置計測方法において、熱交換器の管板とこれに隣接する管支持板との互いに同軸上に位置する管孔同士の位置ずれ量を計測するに際しては、まず、光軸調整工程として、管板の管孔における管支持板とは反対側の孔入口にレーザ光照射手段を設置する。   In the tube hole position measurement method according to the present invention, when measuring the amount of displacement between the tube holes of the heat exchanger and the tube support plate adjacent to the tube plate located on the same axis, first, the optical axis As an adjustment process, a laser beam irradiation means is installed at the hole entrance of the tube plate opposite to the tube support plate.

次に、管板の管孔における管支持板側の孔出口にレーザ光受光手段を設置して、このレーザ光受光手段の受光中心を管板の管孔における孔出口の中心に位置させる。   Next, laser light receiving means is installed at the hole outlet on the tube support plate side in the tube hole of the tube plate, and the light receiving center of the laser light receiving means is positioned at the center of the hole outlet in the tube hole of the tube plate.

そして、レーザ光照射手段の照射中心を孔入口の中心に一致させるのに続いて、このレーザ光照射手段から、レーザ光受光手段の受光中心に向けてレーザ光を照射して、レーザ光照射手段の光軸を管板の管孔における孔入口及び孔出口の各中心を結ぶ中心軸に一致させる。   Then, after making the irradiation center of the laser light irradiation means coincide with the center of the hole entrance, laser light is irradiated from the laser light irradiation means toward the light receiving center of the laser light receiving means. Are aligned with the central axis connecting the centers of the hole inlet and the hole outlet in the tube hole of the tube plate.

次いで、計測工程として、管板における管孔の孔出口からレーザ光受光手段を離間させるのに続いて、管支持板の管孔にレーザ光受光手段を挿入して、その受光中心を管支持板の管孔における中心軸上に位置させる。   Next, as a measurement step, after separating the laser light receiving means from the hole outlet of the tube hole in the tube plate, the laser light receiving means is inserted into the tube hole of the tube support plate, and the light receiving center is set to the tube support plate. It is located on the central axis in the tube hole.

この後、レーザ光照射手段からレーザ光受光手段に向けてレーザ光を照射して、レーザ光受光手段の受光中心と実際のレーザ光受信位置とのずれ量を計測すると、管板及びこれに隣接する管支持板の互いに同軸上に位置する管孔同士の位置ずれ量が計測されることとなる。   Thereafter, when the laser beam is irradiated from the laser beam irradiation unit toward the laser beam receiving unit, and the amount of deviation between the light receiving center of the laser beam receiving unit and the actual laser beam receiving position is measured, The amount of displacement between the tube holes located on the same axis of the tube support plate is measured.

このように、本発明に係る管孔位置計測方法では、管板及びこれに隣接する管支持板の互いに同軸上に位置する管孔同士の位置ずれ量を計測する場合に、扱いづらい長尺の治具やスケールを用いないので、簡単に計測を行い得ることとなるうえ、レーザ光照射手段及びレーザ光受光手段によるレーザ光の送受信により計測を行う分だけ、高精度の計測を行い得ることとなる。   As described above, in the tube hole position measuring method according to the present invention, when measuring the amount of displacement between the tube holes and the tube support plates adjacent to the tube plate located on the same axis, it is difficult to handle. Since no jigs or scales are used, measurement can be performed easily, and high-precision measurement can be performed as much as measurement is performed by transmission / reception of laser light by the laser light irradiation means and laser light reception means. Become.

また、本発明の第２の態様において、前記レーザ光受光手段は、前記受光中心を前記管孔の中心に位置させる調心機能を有している構成としており、この構成を採用すると、レーザ光照射手段の光軸を管板の管孔における中心軸に一致させる作業が簡単なものとなり、その結果、管板及びこれに隣接する管支持板の互いに同軸上に位置する管孔同士の位置ずれ量をより簡単に計測し得ることとなる。   In the second aspect of the present invention, the laser light receiving means has a centering function for positioning the light receiving center at the center of the tube hole. The work of aligning the optical axis of the irradiation means with the central axis of the tube hole of the tube sheet is simplified, and as a result, the position of the tube plate and the tube support plate adjacent thereto are displaced from each other on the same axis. The amount can be measured more easily.

さらに、本発明の第３の態様において、前記計測工程で用いる計測用のレーザ光受光手段には、前記光軸調整工程で用いる光軸調整用の前記レーザ光受光手段とは別のレーザ光受光手段を用いる構成としており、光軸調整工程で用いるレーザ光受光手段を管板の管孔から管支持板の管孔に付け替えて計測工程用としている場合と比べて、付け替え毎に必要な微調整を行わなくて済む分だけ、より手間暇が軽減されることとなる。   Further, in the third aspect of the present invention, the laser beam receiving means for measurement used in the measuring step is a laser beam receiving unit different from the laser beam receiving unit for optical axis adjustment used in the optical axis adjusting step. Compared with the case where the laser beam receiving means used in the optical axis adjustment process is changed from the tube hole of the tube plate to the tube hole of the tube support plate, the fine adjustment required for each change is made. The amount of time and effort required will be reduced as much as it is not necessary.

本発明に係る管孔位置計測方法では、管板及びこれに隣接する管支持板にそれぞれ形成された管孔の相対的な位置ずれ量を簡単に計測することができるのに加えて、高精度の計測を実現することが可能になるという非常に優れた効果がもたらされる。   In the tube hole position measuring method according to the present invention, in addition to being able to easily measure the relative displacement amount of the tube holes respectively formed in the tube plate and the tube support plate adjacent thereto, high accuracy It is possible to achieve a very excellent effect that it is possible to realize the measurement.

本発明の一実施例による管孔位置計測方法によって管孔の位置の計測が成される過熱器の部分断面説明図である。It is a partial cross section explanatory drawing of the superheater by which the measurement of the position of a pipe hole is made | formed by the pipe hole position measuring method by one Example of this invention. 本発明の一実施例による管孔位置計測方法の光軸調整要領を示す過熱器の管板及びこれに隣接する管支持板部分における拡大断面説明図である。It is an expanded sectional explanatory view in the tube sheet of the superheater which shows the optical axis adjustment point of the tube hole position measuring method by one example of the present invention, and the tube support plate part adjacent to this. 本発明の一実施例による管孔位置計測方法の計測要領を示す過熱器の管板及びこれに隣接する管支持板部分における拡大断面説明図である。It is an expanded sectional explanatory view in the tube sheet of the superheater which shows the measuring point of the tube hole position measuring method by one example of the present invention, and the tube support plate part adjacent to this. 図３の計測要領を管板側から見た部分斜視説明図である。FIG. 4 is a partial perspective explanatory view of the measurement procedure of FIG.

以下、本発明を図面に基づいて説明する。
図１〜図４は、本発明に係る管孔位置計測方法の一実施例を示しており、管孔位置計測を実施する熱交換器がボイラの後部伝熱部を構成する過熱器である場合を例に挙げて説明する。 Hereinafter, the present invention will be described with reference to the drawings.
1 to 4 show an embodiment of a method for measuring the position of a hole according to the present invention, and the heat exchanger that performs the hole position measurement is a superheater that constitutes the rear heat transfer section of the boiler. Will be described as an example.

図１に示すように、この過熱器１は、容器２と、この容器２の内部に収容した複数本の伝熱管３を備えている。また、この過熱器１は、容器２の開口端を閉塞するべく配置されて、複数本の伝熱管３の各基端部を支える管板４と、容器２内の長手方向（図示左右方向）に互いに間隔をおいて配置されて、複数本の伝熱管３の各中間部を支える複数の管支持板５を備えており、管板４の厚さ寸法は管支持板５の厚さ寸法よりも大きいものとなっている。   As shown in FIG. 1, the superheater 1 includes a container 2 and a plurality of heat transfer tubes 3 accommodated in the container 2. Moreover, this superheater 1 is arrange | positioned so that the opening end of the container 2 may be obstruct | occluded, the tube sheet 4 which supports each base end part of the several heat exchanger tube 3, and the longitudinal direction (illustration left-right direction) in the container 2 Are provided with a plurality of tube support plates 5 that are spaced apart from each other and support each intermediate portion of the plurality of heat transfer tubes 3, and the thickness dimension of the tube sheet 4 is greater than the thickness dimension of the tube support plate 5. Is also big.

管板４及び管支持板５には、長手方向通しの管孔４ａ，５ａがそれぞれ複数個ずつ形成されており、複数本の伝熱管３は、管板４及び管支持板５の互に同軸上に位置する管孔４ａ，５ａに挿入されて支持されている。   The tube plate 4 and the tube support plate 5 are formed with a plurality of longitudinal tube holes 4 a and 5 a, respectively. The plurality of heat transfer tubes 3 are coaxial with the tube plate 4 and the tube support plate 5. The tube holes 4a and 5a located above are inserted and supported.

管板４及び管支持板５の各管孔４ａ，５ａは、互に同軸上に位置するようにして高精度で形成されているが、伝熱管３を各管孔４ａ，５ａに円滑にそして偏りなく挿入するために、互に同軸上に位置する管孔４ａ，５ａ同士の位置ずれの量を正確に把握する必要があり、特に、厚さ寸法の大きな管板４の管孔４ａと、この管板４に隣接する管支持板５の管孔５ａとの位置ずれの量を正確に把握する必要がある。   The tube holes 4a and 5a of the tube plate 4 and the tube support plate 5 are formed with high accuracy so as to be coaxial with each other, but the heat transfer tube 3 can be smoothly inserted into the tube holes 4a and 5a and In order to insert without deviation, it is necessary to accurately grasp the amount of displacement between the tube holes 4a and 5a that are coaxially positioned with each other, and in particular, the tube hole 4a of the tube plate 4 with a large thickness dimension, It is necessary to accurately grasp the amount of positional deviation from the tube hole 5a of the tube support plate 5 adjacent to the tube plate 4.

そこで、過熱器１の管板４の管孔４ａと、この管板４に隣接する管支持板５の管孔５ａとの位置ずれの量を計測するに際しては、まず、図２に示すように、光軸調整工程として、管板４の管孔４ａにおける管支持板５とは反対側（図示右側）の孔入口４ｂに位置調整治具１０を介してレーザ発振器（レーザ光照射手段）１１を設置する。   Therefore, when measuring the amount of displacement between the tube hole 4a of the tube plate 4 of the superheater 1 and the tube hole 5a of the tube support plate 5 adjacent to the tube plate 4, first, as shown in FIG. As an optical axis adjusting step, a laser oscillator (laser light irradiation means) 11 is provided via a position adjusting jig 10 at a hole entrance 4b of the tube hole 4a of the tube plate 4 opposite to the tube support plate 5 (right side in the figure). Install.

次に、管板４と隣接する管支持板５の管孔５ａを挿通させた補助棒１２の先端に取り付けた光軸調整用のレーザ受信器（レーザ光受光手段）１３を管板４の管孔４ａにおける管支持板５側（図示左側）の孔出口４ｃに設置する。   Next, a laser receiver (laser light receiving means) 13 for adjusting the optical axis attached to the tip of the auxiliary rod 12 inserted through the tube hole 5 a of the tube support plate 5 adjacent to the tube plate 4 is connected to the tube plate 4. The hole 4a is installed at the hole outlet 4c on the tube support plate 5 side (the left side in the figure).

このとき、図２の拡大円内に示すように、レーザ受信器１３は調心機能を有しているので、レーザ受信器１３の受光中心は、管孔４ａの孔出口４ｃの中心に位置することとなる。   At this time, as shown in the enlarged circle of FIG. 2, since the laser receiver 13 has a centering function, the light receiving center of the laser receiver 13 is located at the center of the hole outlet 4c of the tube hole 4a. It will be.

そして、位置調整治具１０のレーザ光軸調整ボタン１０ａを操作してレーザ発振器１１の照射中心を孔入口４ｂの中心に一致させるのに続いて、このレーザ発振器１１から、レーザ受信器１３の受光中心に向けてレーザ光Ｌを照射して、レーザ発振器１１の光軸を管板４の管孔４ａにおける中心軸に一致させる。   Then, the laser light axis adjustment button 10a of the position adjusting jig 10 is operated to make the irradiation center of the laser oscillator 11 coincide with the center of the hole entrance 4b, and then the laser receiver 13 receives light from the laser oscillator 11. The laser beam L is irradiated toward the center so that the optical axis of the laser oscillator 11 coincides with the central axis in the tube hole 4 a of the tube plate 4.

次いで、計測工程として、図３及び図４に示すように、管板４の管孔４ａの孔出口４ｃから光軸調整用のレーザ受信器１３を離間させるのに続いて、管支持板５の管孔５ａに計測用のレーザ受信器（レーザ光受光手段）１４を挿入して、その受光中心Ｐを管支持板５の管孔５ａにおける中心軸上に位置させる。   Next, as shown in FIG. 3 and FIG. 4, as a measurement process, the optical axis adjusting laser receiver 13 is separated from the hole outlet 4 c of the tube hole 4 a of the tube plate 4. A laser receiver (laser light receiving means) 14 for measurement is inserted into the tube hole 5 a and the light receiving center P is positioned on the central axis of the tube hole 5 a of the tube support plate 5.

この後、レーザ発振器１１から計測用のレーザ受信器１４に向けてレーザ光Ｌを照射して、レーザ受信器１４の受光中心Ｐと実際のレーザ光受信位置Ｐａとのずれ量ｄを計測すると、管板４及びこの管板４と隣接する管支持板５の互いに同軸上に位置する管孔４ａ，５ａ同士の位置ずれ量ｄが計測されることとなる。   Thereafter, the laser beam L is irradiated from the laser oscillator 11 toward the measurement laser receiver 14 to measure a deviation amount d between the light receiving center P of the laser receiver 14 and the actual laser light reception position Pa. The positional deviation amount d between the tube holes 4a and 5a located on the same axis of the tube plate 4 and the tube support plate 5 adjacent to the tube plate 4 is measured.

このように、この実施例に係る管孔位置計測方法では、過熱器１の管板４の管孔４ａと、この管板４に隣接する管支持板５の管孔５ａとの位置ずれの量を計測する場合に、扱いづらい長尺の治具やスケールを用いないので、簡単に計測を行い得ることとなるうえ、レーザ発振器１１及びレーザ受信器１３，１４によるレーザ光Ｌの送受信により計測を行う分だけ、高精度の計測を行い得ることとなる。   Thus, in the tube hole position measuring method according to this embodiment, the amount of positional deviation between the tube hole 4a of the tube plate 4 of the superheater 1 and the tube hole 5a of the tube support plate 5 adjacent to the tube plate 4 is achieved. In this case, since a long jig or scale that is difficult to handle is not used, the measurement can be easily performed, and the measurement is performed by transmitting and receiving the laser light L by the laser oscillator 11 and the laser receivers 13 and 14. As much as the measurement is performed, highly accurate measurement can be performed.

また、この実施例に係る管孔位置計測方法では、光軸調整用のレーザ受信器１３が調心機能を有している構成としているので、このレーザ受信器１３を管板４の管孔４ａに挿入するのと同時に、レーザ受信器１３の受光中心が管孔４ａの孔出口４ｃの中心に位置することとなり、したがって、レーザ発振器１１の光軸を管板４の管孔４ａにおける中心軸に一致させる作業がより簡単なものとなる。   Further, in the tube hole position measuring method according to this embodiment, since the laser receiver 13 for adjusting the optical axis has a centering function, the laser receiver 13 is used as the tube hole 4a of the tube plate 4. At the same time, the light receiving center of the laser receiver 13 is positioned at the center of the hole outlet 4c of the tube hole 4a. Therefore, the optical axis of the laser oscillator 11 is set to the center axis of the tube hole 4a of the tube plate 4. Matching work becomes easier.

さらに、この実施例に係る管孔位置計測方法において、計測工程で用いるレーザ受信器１４には、光軸調整工程で用いるレーザ受信器１３とは別のものを用いる構成としており、光軸調整工程で用いるレーザ受信器１３を管板４の管孔４ａから管支持板５の管孔５ａに付け替えて計測工程用としている場合と比べて、付け替え毎に必要な微調整を行わなくて済む分だけ、より手間暇が軽減されることとなる。   Furthermore, in the tube hole position measuring method according to this embodiment, the laser receiver 14 used in the measurement process is configured to use a different one from the laser receiver 13 used in the optical axis adjustment process. Compared with the case where the laser receiver 13 used in the measurement is replaced with the tube hole 5a of the tube support plate 5 from the tube hole 4a of the tube plate 4 and used for the measurement process, the necessary fine adjustment is not necessary for each replacement. This will reduce time and effort.

上記した実施例では、本発明に係る管孔位置計測方法をボイラの後部伝熱部を構成する過熱器の管孔位置の計測に用いた場合を例に挙げて説明したが、これに限定されるものではなく、例えば、熱交換器としてボイラの後部伝熱部を構成する再熱器の管孔位置の計測に用いることができる。   In the above embodiment, the case where the method for measuring the hole position according to the present invention is used for measuring the hole position of the superheater constituting the rear heat transfer section of the boiler has been described as an example, but the present invention is not limited thereto. For example, it can be used for measurement of the tube hole position of the reheater that constitutes the rear heat transfer section of the boiler as a heat exchanger.

本発明に係る管孔位置計測方法の構成は、上記した実施例に限定されるものではない。   The configuration of the tube hole position measuring method according to the present invention is not limited to the above-described embodiment.

１ 過熱器（熱交換器）
３ 伝熱管
４ 管板
４ａ，５ａ 管孔
４ｂ 管孔の孔入口
４ｃ 管孔の孔出口
５ 管支持板
１１ レーザ発振器（レーザ光照射手段）
１３ 光軸調整用のレーザ受信器（レーザ光受光手段）
１４ 計測用のレーザ受信器（レーザ光受光手段）
ｄ レーザ受信器の受光中心と実際のレーザ光受信位置とのずれ量
Ｌ レーザ光
Ｐ レーザ受信器の受光中心
Ｐａ 実際のレーザ光受信位置 1 Superheater (heat exchanger)
3 Heat Transfer Tube 4 Tube Plates 4a and 5a Tube Hole 4b Tube Hole Hole Inlet 4c Tube Hole Hole Outlet 5 Tube Support Plate 11 Laser Oscillator (Laser Light Irradiation Means)
13 Laser receiver for optical axis adjustment (laser light receiving means)
14 Laser receiver for measurement (laser light receiving means)
d A shift amount L between the light receiving center of the laser receiver and the actual laser light receiving position L Laser light P Light receiving center Pa of the laser receiver Actual laser light receiving position

Claims (3)

複数本の伝熱管と、前記複数本の伝熱管の各端部を挿入して支える複数の管孔を有する管板と、前記管板に間隔をおいて対向配置されて前記複数本の伝熱管の各中間部分を挿入して支える管孔を有する管支持板と、を備えた熱交換器の前記管板及び前記管支持板の互いに同軸上に位置する管孔同士の位置ずれ量を計測する管孔位置計測方法であって、
前記管支持板よりも厚さ寸法の大きい前記管板の管孔における前記管支持板とは反対側の孔入口にレーザ光照射手段を設置すると共に、前記管板の管孔における前記管支持板側の孔出口にレーザ光受光手段を設置して、該レーザ光受光手段の受光中心を前記管板の管孔における前記孔出口の中心に位置させるのに続いて、前記管板の管孔における前記孔入口の中心に照射中心を一致させた前記レーザ光照射手段から、前記レーザ光受光手段の受光中心に向けてレーザ光を照射して、前記レーザ光照射手段の光軸を前記管板の管孔における前記孔入口及び前記孔出口の各中心を結ぶ中心軸に一致させる光軸調整工程と、
前記管板の管孔の前記孔出口から前記レーザ光受光手段を離間させるのに続いて、前記管支持板の管孔に前記レーザ光受光手段を挿入して、該レーザ光受光手段の受光中心を前記管支持板の管孔の中心軸上に位置させた状態で、光軸を前記管板の管孔における中心軸に一致させた前記レーザ光照射手段から前記レーザ光受光手段に向けてレーザ光を照射して、該レーザ光受光手段の受光中心と実際のレーザ光受信位置とのずれ量を計測する計測工程とを経る管孔位置計測方法。 A plurality of heat transfer tubes, a tube plate having a plurality of tube holes for inserting and supporting each end of the plurality of heat transfer tubes, and the plurality of heat transfer tubes arranged to face each other with a space between the tube plates And a tube support plate having a tube hole for inserting and supporting each intermediate portion of the tube, and measuring the amount of displacement between the tube plate of the heat exchanger and the tube support plate located coaxially with each other. A method for measuring the position of a hole,
A laser beam irradiating means is installed at a hole entrance opposite to the tube support plate in the tube hole of the tube plate having a thickness dimension larger than that of the tube support plate, and the tube support plate in the tube hole of the tube plate. The laser beam receiving means is installed at the hole outlet on the side, and the light receiving center of the laser beam receiving means is positioned at the center of the hole outlet in the tube hole of the tube plate. Laser light is emitted from the laser light irradiation means whose irradiation center coincides with the center of the hole entrance toward the light receiving center of the laser light receiving means, and the optical axis of the laser light irradiation means is set to the tube plate. An optical axis adjusting step for matching a central axis connecting the centers of the hole inlet and the hole outlet in the tube hole;
Subsequent to separating the laser light receiving means from the hole outlet of the tube hole of the tube plate, the laser light receiving means is inserted into the tube hole of the tube support plate, and the light receiving center of the laser light receiving means is inserted. With the optical axis aligned with the central axis of the tube hole of the tube plate toward the laser light receiving unit. A tube hole position measuring method through a measuring step of irradiating light and measuring a deviation amount between a light receiving center of the laser light receiving means and an actual laser light receiving position. 前記レーザ光受光手段は、前記受光中心を前記管孔の中心に位置させる調心機能を有している請求項１に記載の管孔位置計測方法。   The tube hole position measuring method according to claim 1, wherein the laser light receiving unit has a centering function for positioning the light receiving center at the center of the tube hole. 前記計測工程で用いる計測用のレーザ光受光手段には、前記光軸調整工程で用いる光軸調整用の前記レーザ光受光手段とは別のレーザ光受光手段を用いる請求項１又は２に記載の管孔位置計測方法。   The laser light receiving means for measurement used in the measurement step is a laser light receiving means different from the laser light receiving means for optical axis adjustment used in the optical axis adjustment step. Tube hole position measurement method.
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CN113338640A (en) * 2021-06-16 2021-09-03 中建中新建设工程有限公司 Multilayer building pipeline reserved hole positioning equipment

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