JP2017146150A - Pipe inspection jig and inspection method using the same - Google Patents

Pipe inspection jig and inspection method using the same Download PDF

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JP2017146150A
JP2017146150A JP2016026850A JP2016026850A JP2017146150A JP 2017146150 A JP2017146150 A JP 2017146150A JP 2016026850 A JP2016026850 A JP 2016026850A JP 2016026850 A JP2016026850 A JP 2016026850A JP 2017146150 A JP2017146150 A JP 2017146150A
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pipe
inspection
jig
piping
pair
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栄郎 松村
Shigeo Matsumura
栄郎 松村
秀高 西田
Hidetaka Nishida
秀高 西田
啓司 森下
Keiji Morishita
啓司 森下
大輔 荒川
Daisuke Arakawa
大輔 荒川
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Chugoku Electric Power Co Inc
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Chugoku Electric Power Co Inc
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Abstract

PROBLEM TO BE SOLVED: To provide a piping inspection jig capable of simply and accurately inspecting an outer diameter of a piping while removing ashes adhered on the piping surface to be an inspection object and capable of securely inspecting whether or not the piping is expanded due to creep damages, and an inspection method using the piping inspection jig.SOLUTION: A piping inspection jig 1 includes: an inspection part 3 for inspecting an outer diameter of a pining 2; a pair of removing parts 4 for removing a deposit on an outer peripheral surface of the piping 2; a jig main body 5 for holding the inspection part 3 and the removing parts 4 respectively so as to be away from each other in a longitudinal direction of the piping 2; and an operation part 6 thereof. An interval of a pair of bar-shaped members 31 and 31 of the inspection part 3 is substantially set same to a threshold value which is an estimation of the life in the piping 2, and the interval of a pair of columnar bodies 41 and 41 of the removing parts 4 is set substantially same to or slightly narrower than the interval of the bar-shaped members 31 and 31. The piping inspection jig 1 is caused to slide along the longitudinal direction of the piping 2 in a state that the piping 2 is interposed between the columnar bodies 41 and 41 so that the removing part 4 is placed ahead of the inspection part 3.SELECTED DRAWING: Figure 1

Description

本発明は、配管を点検するための配管点検用治具およびそれを用いた点検方法に関する。   The present invention relates to a pipe inspection jig for inspecting a pipe and an inspection method using the same.

従来、この種の配管点検用治具およびそれを用いた点検方法として、例えば特許文献１に記載された管径測定装置および管径検査方法が知られている。これは、各種ボイラや、火力発電プラント等の高温・高圧の環境下で長時間使用される配管が、クリープ損傷により徐々に膨張するのを、配管の外径を測定することで検出するものである。   Conventionally, as a pipe inspection jig of this type and an inspection method using the same, for example, a pipe diameter measuring device and a pipe diameter inspection method described in Patent Document 1 are known. This is to detect the expansion of piping that is used for a long time in high-temperature and high-pressure environments such as various boilers and thermal power plants by measuring the outer diameter of the piping due to creep damage. is there.

このような配管では、クリープ損傷が進行するとクリープ破壊が起きる可能性があるため、クリープ損傷の進行度合いを把握することが重要となっている。かかるクリープ損傷の進行度合いは、配管の膨張率に基づいて把握することができるため、配管の膨張率を点検するべく、配管の外径の測定が実施されている。   In such a pipe, it is important to grasp the degree of progress of creep damage because creep failure may occur when creep damage progresses. Since the progress degree of the creep damage can be grasped based on the expansion coefficient of the pipe, the outer diameter of the pipe is measured in order to check the expansion coefficient of the pipe.

特開２０１３−１４８４７７号公報JP 2013-148477 A

一般に、配管にクリープ損傷が発生する前には、配管の外径が１〜２％程度膨張することが知られている。このため、配管の外径を測定することにより、配管の取替え時期（寿命）を把握することができる。   In general, it is known that the outer diameter of a pipe expands by about 1 to 2% before creep damage occurs in the pipe. For this reason, it is possible to grasp the replacement time (life) of the pipe by measuring the outer diameter of the pipe.

しかしながら、前述の配管において、燃焼ガスが当たる上流側の配管の外周面には、燃焼ガスと共に飛来する灰が付着していたり、当該外周面を覆うように堆積していたりする場合がある。また、配管の外周面に付着または堆積した灰が硬化していることもある。このような場合、配管の外周面に付着または堆積した灰は掃い落とし、硬化した灰は削り落とす等して除去しなければ配管の外径を正確に測定できず、当該配管にクリープ損傷により交換が必要な程まで膨張した膨出部があるか否かを点検できないという問題があった。   However, in the above-mentioned piping, the ash flying together with the combustion gas may adhere to the outer peripheral surface of the upstream piping to which the combustion gas hits or may be deposited so as to cover the outer peripheral surface. Moreover, the ash adhering or depositing on the outer peripheral surface of the piping may be hardened. In such a case, the ash attached or deposited on the outer peripheral surface of the pipe must be swept away, and the hardened ash must be removed by scraping or the like, so that the outer diameter of the pipe cannot be measured accurately. However, there is a problem that it is not possible to check whether or not there is a bulging portion that has expanded to the extent necessary.

そこで、本発明は上述したような問題に鑑みなされたものであり、検査対象となる配管の外周面の灰などの付着物を除去しながら、当該配管の外径を簡易かつ正確に調査でき、配管にクリープ損傷により交換が必要な程まで膨張した膨出部があるか否かを確実に点検可能な配管点検用治具およびそれを用いた点検方法を提供するものである。   Therefore, the present invention has been made in view of the problems as described above, and while removing deposits such as ash on the outer peripheral surface of the pipe to be inspected, the outer diameter of the pipe can be easily and accurately investigated, The present invention provides a pipe inspection jig and an inspection method using the same, which can reliably inspect whether or not the pipe has a bulging portion that has expanded to a degree that requires replacement due to creep damage.

上記目的を達成するため、本発明に係る配管点検用治具は、
配管の膨出部を検出するための配管点検用治具であって、
前記配管の外径を検査する検査部と、
前記配管の外周面の付着物を除去する除去部と、
前記検査部および前記除去部を、前記配管の長手方向に離間するように、それぞれ保持する治具本体と、
前記治具本体を操作するための操作部と、を備えることを特徴とする。 In order to achieve the above object, a pipe inspection jig according to the present invention is:
A pipe inspection jig for detecting a pipe bulge,
An inspection section for inspecting the outer diameter of the pipe;
A removal section for removing deposits on the outer peripheral surface of the pipe;
Jig bodies for holding the inspection unit and the removal unit so as to be separated from each other in the longitudinal direction of the pipe;
And an operation unit for operating the jig body.

これによれば、配管点検用治具を配管の長手方向に沿って、除去部が検査部よりも先となるように摺動させる簡単な操作によって、検査対象となる配管の外径を検査する前に、その外周面の付着物を除去することができるので、当該配管の外径を簡易かつ正確に調査でき、配管にクリープ損傷により交換が必要な程まで膨張した膨出部があるか否かを確実に点検できる。   According to this, the outer diameter of the pipe to be inspected is inspected by a simple operation of sliding the pipe inspection jig along the longitudinal direction of the pipe so that the removal part is ahead of the inspection part. Since the deposit on the outer peripheral surface can be removed before, the outer diameter of the pipe can be easily and accurately investigated, and whether or not the pipe has a bulge that has expanded to the extent that it needs to be replaced due to creep damage. Can be surely checked.

このとき、前記検査部は、前記治具本体から突出して設けられた一対の棒状体からなり、それらの間に前記配管を挟み込んで前記配管の外径を検査するようにしても良い。
これによれば、検査部の一対の棒状体間に配管を挟み込んだ状態で配管点検用治具を摺動させ、当該配管点検用治具の摺動が阻止された部位が膨出部であると容易に検出できる。 At this time, the inspection unit may be composed of a pair of rod-like bodies provided so as to protrude from the jig main body, and the pipe may be sandwiched between them to inspect the outer diameter of the pipe.
According to this, the pipe inspection jig is slid in a state where the pipe is sandwiched between the pair of rod-like bodies of the inspection part, and the portion where the sliding of the pipe inspection jig is prevented is the bulging part. And can be easily detected.

しかも、前記一対の棒状体は、前記治具本体側の基端部から先端部に向かうに従って間隔が狭くなるクランプ形状をなしているようにしても良い。
これによれば、配管が複数併設される場合においても手前側の配管を検査した後、この配管を一対の棒状体における基端部側に配置した状態で、次に奥側の配管を検査できるため、検査作業の効率化を図ることができる。 In addition, the pair of rod-shaped bodies may have a clamp shape in which the interval becomes narrower from the proximal end portion on the jig body side toward the distal end portion.
According to this, even when a plurality of pipes are provided side by side, after inspecting the pipe on the near side, the pipe on the back side can be inspected next in a state where the pipe is arranged on the base end side in the pair of rod-shaped bodies. Therefore, the efficiency of the inspection work can be improved.

また、前記検査部は、レーザーまたは超音波を用いて前記配管の外径を検査するようにしても良い。
これによれば、検査部が検査対象となる配管に直接触れることなく当該配管の外径を簡易かつ正確に調査できる。 Moreover, you may make it the said test | inspection part test | inspect the outer diameter of the said piping using a laser or an ultrasonic wave.
According to this, the outer diameter of the pipe can be easily and accurately investigated without directly touching the pipe to be inspected by the inspection unit.

さらに、前記除去部は、前記治具本体から突出して設けられた一対の柱状体からなり、前記治具本体に対して軸中心に回転自在に保持されるようにしても良い。
これによれば、除去部は、一対の柱状体間に配管を挟み込んで軸中心に回転しながら、当該配管の外周面の付着物を除去することができる。 Furthermore, the removal portion may be formed of a pair of columnar bodies provided so as to protrude from the jig main body, and may be held rotatably about the axis with respect to the jig main body.
According to this, the removal part can remove the deposits on the outer peripheral surface of the pipe while sandwiching the pipe between the pair of columnar bodies and rotating around the axis.

また、前記除去部は、前記治具本体から突出して設けられた一対の柱状体からなり、前記治具本体に対して軸方向に往復自在に保持されるようにしても良い。
これによれば、除去部は、一対の柱状体間に配管を挟み込んで軸方向に往復しながら、当該配管の外周面の付着物を除去することができる。 Further, the removal portion may be formed of a pair of columnar bodies provided so as to protrude from the jig main body, and may be held reciprocally in the axial direction with respect to the jig main body.
According to this, the removal part can remove the deposit on the outer peripheral surface of the pipe while sandwiching the pipe between the pair of columnar bodies and reciprocating in the axial direction.

また、本発明に係る配管点検方法は、
配管の膨出部を検出するための配管点検方法であって、
請求項１〜６のいずれか一項に記載の配管点検用治具を、前記配管の長手方向に沿って、前記除去部の方が前記検査部より先となるように摺動させる配管点検工程を備えることを特徴とする。 Moreover, the piping inspection method according to the present invention includes:
A pipe inspection method for detecting a bulging part of a pipe,
A pipe inspection step of sliding the pipe inspection jig according to any one of claims 1 to 6 along the longitudinal direction of the pipe so that the removal section is ahead of the inspection section. It is characterized by providing.

これによれば、配管点検用治具を配管の長手方向に沿って、除去部が検査部よりも先となるように摺動させる簡単な操作によって、検査対象となる配管の外径を検査する前に、その外周面の付着物を除去することができるので、当該配管の外径を簡易かつ正確に調査でき、配管にクリープ損傷により交換が必要な程まで膨張した膨出部があるか否かを確実に点検できる。   According to this, the outer diameter of the pipe to be inspected is inspected by a simple operation of sliding the pipe inspection jig along the longitudinal direction of the pipe so that the removal part is ahead of the inspection part. Since the deposit on the outer peripheral surface can be removed before, the outer diameter of the pipe can be easily and accurately investigated, and whether or not the pipe has a bulge that has expanded to the extent that it needs to be replaced due to creep damage. Can be surely checked.

本発明によれば、検査対象となる配管の外周面の付着物を除去しながら、当該配管の外径を簡易かつ正確に調査でき、配管にクリープ損傷により交換が必要な程まで膨張した膨出部があるか否かを確実に点検できる。   According to the present invention, it is possible to easily and accurately investigate the outer diameter of the pipe while removing the deposits on the outer peripheral surface of the pipe to be inspected, and the bulge expanded to the extent that the pipe needs to be replaced due to creep damage. It is possible to reliably check whether there is a part.

実施形態による配管点検用治具を概略的に示す斜視図である。It is a perspective view showing roughly a jig for piping inspection by an embodiment. 配管の膨出の説明に供する図である。It is a figure where it uses for description of the swelling of piping. 配管の膨出量とその寿命との関係を示すグラフである。It is a graph which shows the relationship between the amount of swelling of piping, and its lifetime. 配管に灰が付着した様子を概略的に示す断面図である。It is sectional drawing which shows roughly a mode that ash adhered to piping. 他の実施形態による配管点検用治具の要部を示す概略図である。It is the schematic which shows the principal part of the jig for piping inspection by other embodiment.

以下、本発明に係る配管点検用治具およびそれを用いた点検方法の一実施形態について図面を参照しながら説明する。なお、本発明は、請求の範囲および明細書全体から読み取ることのできる発明の要旨または思想に反しない範囲で適宜変更可能であり、そのような変更を伴う配管点検用治具およびそれを用いた点検方法もまた本発明の技術思想に含まれる。   DESCRIPTION OF EXEMPLARY EMBODIMENTS An embodiment of a pipe inspection jig and an inspection method using the same according to the invention will be described below with reference to the drawings. In addition, this invention can be suitably changed in the range which is not contrary to the summary or idea of the invention which can be read from a claim and the whole specification, and the jig | tool for piping inspection accompanying such a change and it were used. The inspection method is also included in the technical idea of the present invention.

図１に示すように、本実施形態における配管点検用治具１は、配管の膨出部を検出するための治具であって、不図示の各種ボイラや、火力発電プラント等の高温・高圧の環境下で長時間使用される配管２が、図２に破線で示すように、クリープ損傷により徐々に膨張するのを、配管２の外径を調査することで検出するものである。   As shown in FIG. 1, a pipe inspection jig 1 according to the present embodiment is a jig for detecting a bulging portion of a pipe, and is a high-temperature / high-pressure such as various boilers (not shown) and thermal power plants. By examining the outer diameter of the pipe 2, it is detected that the pipe 2 used for a long time in this environment gradually expands due to creep damage, as indicated by a broken line in FIG. 2.

このような配管２では、図３に示すように、クリープ損傷が進行すると配管２も膨張を続ける。そして、この配管２をその取替え時期（交換が必要となる寿命の目安としての外径の閾値）を超えても交換することなく使用し続けた場合、クリープ破壊が起きる可能性が高まる。そのため、本実施形態では、クリープ損傷の進行度合いを配管２の膨張率に基づいて把握するべく、配管点検用治具１によって配管２の外径を調査し、これにより配管２にクリープ損傷により交換が必要な程まで膨張した膨出部があるか否かを検出することで、配管２のクリープ破壊を未然に防止するための点検を実施する。   In such a pipe 2, as shown in FIG. 3, when creep damage proceeds, the pipe 2 also continues to expand. If the pipe 2 continues to be used without replacement even after the replacement time (outside diameter threshold as a guideline of the life that needs to be replaced), the possibility of creep breakage increases. Therefore, in this embodiment, in order to grasp the progress degree of the creep damage based on the expansion rate of the pipe 2, the outer diameter of the pipe 2 is investigated by the pipe inspection jig 1, thereby replacing the pipe 2 due to the creep damage. By detecting whether or not there is a bulging portion that has expanded to the extent necessary, an inspection for preventing creep destruction of the pipe 2 is performed.

具体的に、配管点検用治具１は、配管２の外径を検査する検査部３と、配管２の外周面の付着物Ｒ（後述の図４参照）を除去する除去部４と、検査部３および除去部４を、配管２の長手方向に離間するように、それぞれ保持する治具本体５と、治具本体５を操作するための操作部６と、を備えて構成されている。この操作部６は、治具本体５に対して不図示の継手部などを介して取付位置（取付角度）が変更可能に連結されている。また、この操作部６は、その長手方向に伸縮自在な構造となっており、長さ調整も可能になっている。   Specifically, the pipe inspection jig 1 includes an inspection unit 3 that inspects the outer diameter of the pipe 2, a removal unit 4 that removes deposits R (see FIG. 4 described later) on the outer peripheral surface of the pipe 2, and an inspection The part 3 and the removal part 4 are configured to include a jig body 5 that holds the part 3 and the removal part 4 in the longitudinal direction of the pipe 2, and an operation part 6 for operating the jig body 5. The operation unit 6 is connected to the jig body 5 through a joint unit (not shown) so that the mounting position (mounting angle) can be changed. Further, the operation unit 6 has a structure that can be expanded and contracted in the longitudinal direction, and the length can be adjusted.

検査部３は、一対の棒状体（例えば、棒状部材３１，３１）からなり、治具本体５に設けられた長孔３２に対して略垂直に立設された状態で、且つ、長孔３２に沿って、それら棒状部材３１，３１の間隔が調整可能に設けられており、配管２を挟み込んでその外径を検査するようになっている。このとき、一対の棒状部材３１，３１の間隔は、図３に示すような配管２の交換が必要となる寿命の目安としての配管２の外径の閾値と同じか、それよりも僅かに小さく設定されている。このように構成することにより、検査部３は、一対の棒状部材３１，３１間に配管２を挟み込んだ状態で、配管点検用治具１を配管２の長手方向に摺動させる簡単な操作で、当該配管点検用治具１の摺動が阻止された部位が、クリープ損傷により配管２の交換が必要な程まで膨張した膨出部であると容易に検出することが可能となっている。なお、一対の棒状部材３１，３１は中空状に形成されていても良い。   The inspection unit 3 is composed of a pair of rod-shaped bodies (for example, rod-shaped members 31, 31), is in a state of being erected substantially perpendicular to the long hole 32 provided in the jig main body 5, and the long hole 32. The distance between the rod-shaped members 31 and 31 is adjustable so that the outer diameter of the pipe 2 is inspected. At this time, the distance between the pair of rod-shaped members 31, 31 is the same as or slightly smaller than the threshold value of the outer diameter of the pipe 2 as an indication of the life required to replace the pipe 2 as shown in FIG. Is set. By configuring in this way, the inspection unit 3 can be easily operated by sliding the pipe inspection jig 1 in the longitudinal direction of the pipe 2 in a state where the pipe 2 is sandwiched between the pair of rod-shaped members 31 and 31. It is possible to easily detect that the portion where the sliding of the piping inspection jig 1 is prevented is a bulging portion that has expanded to the extent that the piping 2 needs to be replaced due to creep damage. In addition, a pair of rod-shaped members 31 and 31 may be formed in the hollow shape.

ここで、配管２においては、例えば図４に示すように、図中矢印で示す燃焼ガスが当たる上流側の配管２の外周面には、燃焼ガスと共に飛来する灰などの付着物Ｒが付着していたり、これが当該外周面を覆うように堆積していたりする場合がある。また、配管２の外周面に付着または堆積した灰などの付着物Ｒが硬化していることもある。そのため、本実施形態の配管点検用治具１では、このような配管２の外周面に付着または堆積した付着物Ｒを掃い落とし、当該付着物Ｒが硬化している場合には削り落として除去するための除去部４が、検査部３と一体的に治具本体５に設けられている。   Here, in the pipe 2, for example, as shown in FIG. 4, the deposit R such as ash flying along with the combustion gas adheres to the outer peripheral surface of the upstream pipe 2 where the combustion gas indicated by the arrow in FIG. Or it may be deposited so as to cover the outer peripheral surface. Further, the deposit R such as ash adhered or deposited on the outer peripheral surface of the pipe 2 may be cured. Therefore, in the pipe inspection jig 1 according to the present embodiment, the deposit R adhered or deposited on the outer peripheral surface of the pipe 2 is swept away, and if the deposit R is cured, it is scraped off and removed. The removal part 4 for this purpose is provided in the jig body 5 integrally with the inspection part 3.

この除去部４は、例えば、治具本体５から突出して設けられた一対の柱状体４１，４１からなり、治具本体５に設けられた長孔３１と、配管２の長手方向に平行な位置に離間して配置された長孔４２に対して略垂直に立設された状態で、且つ、長孔４２に沿って、それら一対の柱状体４１，４１の間隔が調整可能に設けられている。また、一対の柱状体４１，４１は、それぞれ取付軸４３，４３とその周りに設けられたワイヤブラシ等からなるブラシ４４，４４とを有して構成されており、それぞれ治具本体５に対して取付軸４３を軸中心として回転自在に保持されている。このとき、一対の柱状体４１，４１の間隔は、配管２の外周面の付着物Ｒをブラシ４３により除去可能となるように、検査部３の一対の棒状部材３１，３１の間隔と同程度か僅かに狭く設定されている。また、除去部４の一対の柱状体４１，４１は、治具本体５に設けられた不図示のモーター等によって回転するように構成されており、このモーターは電源ケーブル７を介して電源が供給される。そして、一対の柱状体４１，４１は、配管２を挟み込んだ状態で配管２の長手方向に配管点検用治具１が摺動される際、例えば、配管２の上方から下方に向けて巻き込む方向（図１中、白抜き矢印で示す方向）にブラシ４４を回転させる。これにより、除去部４よりも下流側で配管２を迎える検査部３に到達する前に、当該配管２の外周面の付着物Ｒを除去することができる。   The removal portion 4 includes, for example, a pair of columnar bodies 41 and 41 that protrude from the jig main body 5, and a position parallel to the long hole 31 provided in the jig main body 5 and the longitudinal direction of the pipe 2. The pair of columnar bodies 41, 41 are provided so that the distance between the pair of columnar bodies 41, 41 can be adjusted along the long hole 42. . Further, the pair of columnar bodies 41, 41 are configured to have mounting shafts 43, 43 and brushes 44, 44 made of wire brushes or the like provided around the mounting shafts 43, 43, respectively. The mounting shaft 43 is held rotatably about the axis. At this time, the interval between the pair of columnar bodies 41, 41 is approximately the same as the interval between the pair of rod-shaped members 31, 31 of the inspection unit 3 so that the deposit R on the outer peripheral surface of the pipe 2 can be removed by the brush 43. It is set slightly narrower. The pair of columnar bodies 41, 41 of the removing unit 4 is configured to rotate by a motor (not shown) provided on the jig body 5, and the motor is supplied with power via a power cable 7. Is done. When the pipe inspection jig 1 is slid in the longitudinal direction of the pipe 2 with the pipe 2 sandwiched between the pair of columnar bodies 41, 41, for example, the direction in which the pipe 2 is wound downward from above. The brush 44 is rotated in the direction indicated by the white arrow in FIG. Thereby, the deposit R on the outer peripheral surface of the pipe 2 can be removed before reaching the inspection unit 3 that reaches the pipe 2 on the downstream side of the removing unit 4.

ここで、本実施形態による配管点検用治具１を用いた配管点検方法について説明する。まず、配管点検用治具１における検査部３の一対の棒状部材３１，３１の間隔を、検査対象となる配管２における前記交換が必要となる寿命の目安としての配管２の外径の閾値と同じか僅かに小さく設定すると共に、除去部４の一対の柱状体４１，４１の間隔を、検査部３の一対の棒状部材３１，３１の間隔と同程度か僅かに狭く設定されている。次いで、検査部３の一対の棒状部材３１，３１間および除去部４の一対の柱状体４１，４１間に配管２を介在させ、この状態で、且つ、除去部４の方が検査部３より先となるように、配管２の長手方向に沿って配管点検用治具１を摺動させる。このとき、除去部４の一対の柱状体４１，４１は、配管２の上方から下方に向けて巻き込む方向にブラシ４４を回転させ、除去部４よりも下流側で配管２を迎える検査部３に到達する前に、当該配管２の外周面の付着物Ｒを除去する。そして、検査部３に到達した配管２は、一対の棒状部材３１，３１の間隔が前記閾値に設定されているため、検査部３（一対の棒状部材３１，３１間）を通過する摺動が阻止された部位が、クリープ損傷により配管２の交換が必要な程まで膨張した膨出部であり、配管２の交換が必要であることが検出できる。   Here, a pipe inspection method using the pipe inspection jig 1 according to the present embodiment will be described. First, the distance between the pair of rod-like members 31 and 31 of the inspection unit 3 in the pipe inspection jig 1 is the threshold value of the outer diameter of the pipe 2 as an indication of the life that requires replacement in the pipe 2 to be inspected. The distance between the pair of columnar bodies 41, 41 of the removal unit 4 is set to be the same or slightly smaller than the distance between the pair of rod-shaped members 31, 31 of the inspection unit 3. Next, the pipe 2 is interposed between the pair of rod-shaped members 31 and 31 of the inspection unit 3 and between the pair of columnar bodies 41 and 41 of the removal unit 4. In this state, the removal unit 4 is more than the inspection unit 3. The pipe inspection jig 1 is slid along the longitudinal direction of the pipe 2 so that it comes first. At this time, the pair of columnar bodies 41, 41 of the removal unit 4 rotates the brush 44 in the direction of winding downward from the upper side of the pipe 2 to the inspection unit 3 that faces the pipe 2 on the downstream side of the removal unit 4. Before reaching, the deposit R on the outer peripheral surface of the pipe 2 is removed. And since the pipe | tube 2 which reached | attained the test | inspection part 3 has the space | interval of a pair of rod-shaped members 31 and 31 set to the said threshold value, the sliding which passes the test | inspection part 3 (between a pair of rod-shaped members 31 and 31) is carried out. It can be detected that the blocked portion is a bulging portion that has expanded to the extent that the pipe 2 needs to be replaced due to creep damage, and the pipe 2 needs to be replaced.

以上、説明したように、本実施形態による配管点検用治具１では、配管２の外径を検査する検査部３と、配管２の外周面の付着物Ｒを除去する除去部４と、検査部３および除去部４を、配管２の長手方向に離間するように、それぞれ保持する治具本体５と、治具本体５を操作するための操作部６と、を備えて構成する。そして、検査部３の一対の棒状部材３１，３１の間隔を、配管２における前記寿命の目安である閾値と同じか僅かに小さく設定すると共に、除去部４の一対の柱状体４１，４１の間隔を、検査部３の一対の棒状部材３１，３１の間隔と同程度か僅かに狭く設定し、除去部４の一対の柱状体４１，４１間および検査部３の一対の棒状部材３１，３１間に配管２を介在させた状態で、且つ、除去部４の方が検査部３より先となるように、当該配管２の長手方向に沿って配管点検用治具１を摺動させるという簡単な操作だけで、検査対象となる配管２の外周面の灰などの付着物Ｒを除去しつつ、当該配管２の外径を簡易かつ正確に調査できる。従って、配管２がクリープ損傷により交換が必要な程、膨張しているか否かを確実に点検できる。よって、配管２を適切な時期に交換可能となるため、当該配管２を備える機器の信頼性を向上させることができる。   As described above, in the pipe inspection jig 1 according to the present embodiment, the inspection unit 3 that inspects the outer diameter of the pipe 2, the removal unit 4 that removes the deposit R on the outer peripheral surface of the pipe 2, and the inspection The part 3 and the removal part 4 are configured to include a jig main body 5 that holds the jig 3 and the operation part 6 for operating the jig main body 5 so as to be separated from each other in the longitudinal direction of the pipe 2. And while setting the space | interval of a pair of rod-shaped members 31 and 31 of the test | inspection part 3 as the threshold value which is the standard of the said lifetime in the piping 2, or the space | interval of a pair of columnar bodies 41 and 41 of the removal part 4 Is set to be the same as or slightly narrower than the interval between the pair of rod-shaped members 31 and 31 of the inspection unit 3, and between the pair of columnar bodies 41 and 41 of the removal unit 4 and between the pair of rod-shaped members 31 and 31 of the inspection unit 3 The pipe inspection jig 1 is slid along the longitudinal direction of the pipe 2 so that the pipe 2 is interposed between the pipe 2 and the removal section 4 is ahead of the inspection section 3. Only by the operation, the outer diameter of the pipe 2 can be easily and accurately investigated while removing the deposit R such as ash on the outer peripheral surface of the pipe 2 to be inspected. Therefore, it can be surely checked whether or not the pipe 2 has expanded to such an extent that it needs to be replaced due to creep damage. Therefore, since the pipe 2 can be exchanged at an appropriate time, the reliability of the device including the pipe 2 can be improved.

なお、上述した実施形態においては、検査部３が一対の棒状部材３１，３１からなる場合について述べたが、本発明はこれに限ることはなく、例えば、図５に示すように、治具本体５側の基端部から先端部に向かうに従って間隔が狭くなるクランプ形状に形成された一対の柱状体３０，３０によって検査部３を構成するようにしても良い。これによれば、配管２が複数併設される場合においても手前側の配管２を検査した後、この配管２を一対の柱状体３０，３０における基端部側に配置した状態で、次に奥側の配管２を検査できるため、検査作業の効率化を図ることができる。   In the above-described embodiment, the case where the inspection unit 3 includes the pair of rod-shaped members 31 and 31 has been described. However, the present invention is not limited to this, for example, as shown in FIG. You may make it comprise the test | inspection part 3 by a pair of columnar bodies 30 and 30 formed in the clamp shape whose space | interval becomes narrow as it goes to a front-end | tip part from the base end part of 5 side. According to this, even when a plurality of pipes 2 are provided, after inspecting the pipe 2 on the near side, the pipe 2 is disposed on the base end side in the pair of columnar bodies 30 and 30, and then the rear side. Since the side pipe 2 can be inspected, the efficiency of the inspection work can be improved.

また、上述した実施形態においては、検査部３が一対の棒状部材３１，３１からなる場合について述べたが、本発明はこれに限ることはなく、例えば、検査部としては、レーザーまたは超音波を用いて配管２の外径を検査するようにしても良い。これによれば、検査部が検査対象となる配管２に直接触れることなく当該配管２の外径を簡易かつ正確に調査できる。   In the above-described embodiment, the case where the inspection unit 3 includes the pair of rod-shaped members 31 and 31 has been described. However, the present invention is not limited to this, and for example, the inspection unit may be a laser or an ultrasonic wave. You may make it test | inspect the outer diameter of the piping 2 using. According to this, the outer diameter of the pipe 2 can be easily and accurately investigated without the inspection unit directly touching the pipe 2 to be inspected.

さらに、上述した実施形態においては、除去部４の一対の柱状体４１，４１が、それぞれ治具本体５に対して取付軸４３を軸中心として回転自在に保持されている場合について述べたが、本発明はこれに限ることはなく、例えば、一対の柱状体４１，４１を、治具本体５に対して取付軸４３の軸方向に往復自在に保持されるようにしても良い。この場合、一対の柱状体４１，４１は、配管２を挟み込んで取付軸４３の軸方向に往復しながら、当該配管２の外周面の付着物Ｒを除去することができる。   Furthermore, in the above-described embodiment, the case where the pair of columnar bodies 41, 41 of the removing unit 4 is rotatably held with respect to the jig body 5 about the attachment shaft 43 as an axis center has been described. The present invention is not limited to this. For example, the pair of columnar bodies 41, 41 may be reciprocally held in the axial direction of the mounting shaft 43 with respect to the jig body 5. In this case, the pair of columnar bodies 41, 41 can remove the deposit R on the outer peripheral surface of the pipe 2 while sandwiching the pipe 2 and reciprocating in the axial direction of the mounting shaft 43.

１，１０…配管点検用治具
２…配管
３…検査部
３０…柱状体
３１…棒状部材（棒状体）
３２…長孔
４…除去部
４１…柱状体
４２…長孔
４３…取付軸
４４…ブラシ
５…治具本体
６…操作部
７…電源ケーブル
Ｒ…付着物 DESCRIPTION OF SYMBOLS 1,10 ... Jig for piping inspection 2 ... Piping 3 ... Inspection part 30 ... Columnar body 31 ... Bar-shaped member (bar-shaped body)
32 ... Long hole 4 ... Removal part 41 ... Columnar body 42 ... Long hole 43 ... Mounting shaft 44 ... Brush 5 ... Jig body 6 ... Operation part 7 ... Power cable R ... Deposit

Claims (7)

配管の膨出部を検出するための配管点検用治具であって、
前記配管の外径を検査する検査部と、
前記配管の外周面の付着物を除去する除去部と、
前記検査部および前記除去部を、前記配管の長手方向に離間するように、それぞれ保持する治具本体と、
前記治具本体を操作するための操作部と、を備える
ことを特徴とする配管点検用治具。 A pipe inspection jig for detecting a pipe bulge,
An inspection section for inspecting the outer diameter of the pipe;
A removal section for removing deposits on the outer peripheral surface of the pipe;
Jig bodies for holding the inspection unit and the removal unit so as to be separated from each other in the longitudinal direction of the pipe;
A pipe inspection jig, comprising: an operation unit for operating the jig body. 前記検査部は、前記治具本体から突出して設けられた一対の棒状体からなり、それらの間に前記配管を挟み込んで前記配管の外径を検査する
ことを特徴とする請求項１に記載の配管点検用治具。 The said inspection part consists of a pair of rod-shaped body provided protruding from the said jig | tool main body, pinches | interposes the said piping between them, and test | inspects the outer diameter of the said piping. Pipe inspection jig. 前記一対の棒状体は、前記治具本体側の基端部から先端部に向かうに従って間隔が狭くなるクランプ形状をなしている
ことを特徴とする請求項２に記載の配管点検用治具。 The pipe inspection jig according to claim 2, wherein the pair of rod-shaped bodies have a clamp shape in which a distance is narrowed from a base end portion on the jig main body side toward a tip end portion. 前記検査部は、レーザーまたは超音波を用いて前記配管の外径を検査する
ことを特徴とする請求項１に記載の配管点検用治具。 The said inspection part inspects the outer diameter of the said piping using a laser or an ultrasonic wave. The jig for piping inspection of Claim 1 characterized by the above-mentioned. 前記除去部は、前記治具本体から突出して設けられた一対の柱状体からなり、前記治具本体に対して軸中心に回転自在に保持される
ことを特徴とする請求項１〜４のいずれか一項に記載の配管点検用治具。 The said removal part consists of a pair of columnar body protruded from the said jig | tool main body, and is rotatably hold | maintained with respect to the said jig | tool main body at an axial center. The piping inspection jig according to claim 1. 前記除去部は、前記治具本体から突出して設けられた一対の柱状体からなり、前記治具本体に対して軸方向に往復自在に保持される
ことを特徴とする請求項１〜４のいずれか一項に記載の配管点検用治具。 The said removal part consists of a pair of columnar body provided protruding from the said jig | tool main body, and is hold | maintained so that reciprocation is possible in the axial direction with respect to the said jig | tool main body. The piping inspection jig according to claim 1. 配管の膨出部を検出するための配管点検方法であって、
請求項１〜６のいずれか一項に記載の配管点検用治具を、前記配管の長手方向に沿って、前記除去部の方が前記検査部より先となるように摺動させる配管点検工程を備える
ことを特徴とする配管点検方法。 A pipe inspection method for detecting a bulging part of a pipe,
A pipe inspection step of sliding the pipe inspection jig according to any one of claims 1 to 6 along the longitudinal direction of the pipe so that the removal section is ahead of the inspection section. A piping inspection method characterized by comprising:
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JP2010243383A (en) * 2009-04-08 2010-10-28 Chugoku Electric Power Co Inc:The Tree diameter measuring instrument
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JP2013148477A (en) * 2012-01-19 2013-08-01 Mitsubishi Heavy Ind Ltd Pipe diameter measuring instrument and pipe diameter inspection method

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Publication number Priority date Publication date Assignee Title
JPH04116715U (en) * 1990-12-21 1992-10-20 三菱重工業株式会社 Boiler tube wall thickness automatic measuring device
JP2007240339A (en) * 2006-03-09 2007-09-20 Space Creation:Kk Linearly moving dimension measuring device
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Publication number Priority date Publication date Assignee Title
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