JP2006283776A - Pipe condition monitoring device - Google Patents

Pipe condition monitoring device Download PDF

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JP2006283776A
JP2006283776A JP2005100482A JP2005100482A JP2006283776A JP 2006283776 A JP2006283776 A JP 2006283776A JP 2005100482 A JP2005100482 A JP 2005100482A JP 2005100482 A JP2005100482 A JP 2005100482A JP 2006283776 A JP2006283776 A JP 2006283776A
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pipe
tape
sheet
tag
monitoring device
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Kohei Soga
康平 曽我
Kiichi Hamaura
紀一 浜浦
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Hitachi Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Pipeline Systems (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe condition monitoring device capable of monitoring conditions of a pipe welded section such as cracks and reduced welding thickness during normal operation of a plant. <P>SOLUTION: A plurality of IC tags 4 with sensors are arranged on a strip of tape or a sheet 3, and the strip of tape or sheet 3 is circularly mounted along a pipe welded section or an orifice 2. Further, when the tape or sheet 3 is circularly mounted along the pipe welded section or orifice 2, the IC tags are arranged in a plurality of rows so as to be located in front and in the rear of the pipe welded section or orifice 2 against a flowing direction of fluid in the pipe. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、原子カ，火カ発電プラント等における配管の状態（亀裂，減肉等）を監視する配管状態監視装置に関する。   The present invention relates to a pipe state monitoring device that monitors the state (cracking, thinning, etc.) of piping in an atomic power plant, a thermal power plant or the like.

プラント監視診断システムに関する従来技術として、例えば特許文献１には、プラントの運転状態，機器の動作状態，環境状態を検出した検出データと、プラントの検査データとを蓄積して、蓄積された検出データと検査データからなるプラント履歴情報に基づいて、プラント状態を診断することが記載されている。   As a conventional technique related to a plant monitoring and diagnosis system, for example, Patent Document 1 discloses that accumulated detection data is obtained by accumulating detection data for detecting a plant operation state, an apparatus operation state, and an environmental state, and plant inspection data. And diagnosing the plant state based on plant history information consisting of inspection data.

特開平６−３３１５０７号公報JP-A-6-331507

ところで、火力発電プラントや原子力発電プラントといった発電プラントでは、プラントを構成する設備の数は非常に多いため、これに従い配管溶接部の数も数万〜数十万点に渡ることになる。このため、数万〜数十万点に及ぶ配管溶接部を一度に全て点検することは現実的には不可能であり、定検毎に順番に実施されている。   By the way, in a power plant such as a thermal power plant or a nuclear power plant, the number of facilities constituting the plant is very large, and accordingly, the number of pipe welds reaches tens of thousands to hundreds of thousands. For this reason, it is practically impossible to inspect all tens of thousands to hundreds of thousands of pipe welds at a time, and the inspection is performed in order for each regular inspection.

また、プラント監視診断システムによる異常監視についても、限られた設備だけが監視対象となっており、プラントの計算機に取り込まれた運転データ，仮設の限られた計器の運転データを基にした評価を行っていた。   In addition, only limited facilities are monitored for abnormal monitoring by the plant monitoring and diagnosis system, and evaluations based on operating data imported to plant computers and operating data of limited temporary instruments are performed. I was going.

特に、配管溶接部の亀裂やオリフィス設置都の減肉状況を監視するためには、溶接線上又は対象範囲上にセンサーを個々に手で移動させ波形を確認していく必要があり、常に監視することはできなかった。また、配管などの設備は溶接により接続されており、その数はプラントで数万点／数十万点になる。このため、センサーを常設する方法もケーブル，電源の問題等があり、配管溶接部などの設備状況をプラント全体に渡って監視することは困難であった。   In particular, in order to monitor cracks in pipe welds and thinning in the orifice installation capital, it is necessary to move the sensor individually on the welding line or target range and check the waveform, and always monitor it. I couldn't. In addition, equipment such as piping is connected by welding, and the number thereof is tens of thousands / hundreds of thousands in the plant. For this reason, the method of permanently installing the sensor also has a problem of cables and power supplies, and it is difficult to monitor the state of equipment such as a pipe welded part over the entire plant.

なお、溶接部の中に亀裂や溶接欠陥があった場合、運転中の振動や熱応カなどにより時間とともに亀裂が進展する恐れがある。配管の貫通亀裂への進展を防止するためには、異常の早期発見が必要であるが、配管溶接部の欠陥は材料内部のミクロの欠陥であり、外部から簡単に確認することができない。従って、リークが発生する前に配管溶接部の欠陥を発見することができるのは定期点検時に限られることになる。また、配管内の流体流れによる減肉事象に対しても、同様に異常の進展状況を外部から簡単に確認することができないため、定期点検時の確認が必要となる。   In addition, when there is a crack or a weld defect in the welded portion, the crack may develop with time due to vibration or thermal stress during operation. In order to prevent the pipe from progressing to penetration cracks, early detection of abnormality is necessary, but the defect in the pipe weld is a micro defect inside the material and cannot be easily confirmed from the outside. Therefore, the defect of the pipe welded part can be found before the leak occurs only during the periodic inspection. In addition, even for a thinning event due to the fluid flow in the pipe, the progress of the abnormality cannot be easily confirmed from the outside as well, so confirmation at the periodic inspection is necessary.

本発明の目的は、プラントの通常運転時でも亀裂，減肉といった配管溶接部の状態を監視することが可能な配管状態監視装置を提供することにある。   An object of the present invention is to provide a pipe state monitoring device capable of monitoring the state of a pipe welded portion such as cracking and thinning even during normal operation of a plant.

本発明の配管状態監視装置は、センサーを備えたＩＣタグを帯状のシートまたはテープ上に複数配置し、この帯状のシートまたはテープを配管溶接部に沿って環状に取り付けるように構成している。   The piping state monitoring apparatus of the present invention is configured such that a plurality of IC tags provided with sensors are arranged on a belt-like sheet or tape, and the belt-like sheet or tape is attached in a ring shape along the pipe welding portion.

本発明によれば、プラントの通常運転時でも亀裂，減肉といった配管溶接部の状態を監視することが可能となる。   According to the present invention, it is possible to monitor the state of the welded part of the pipe such as cracks and thinning even during normal operation of the plant.

本実施例は、火力発電プラントや原子力発電プラントといったプラント設備における数万〜数十万点に渡る配管溶接部等の異常進展状況を、アドレス付き無線ＩＣタグのセンサーによって集中監視するようにしたものである。すなわち、アドレス付き無線ＩＣタグを数万〜数十万点に渡る配管溶接部等に取り付けておくことにより、プラント全体を対象に異常発生箇所を特定することが可能となる。   In this embodiment, abnormal progress of tens of thousands to hundreds of thousands of pipe welds in plant facilities such as thermal power plants and nuclear power plants is centrally monitored by sensors of wireless IC tags with addresses. It is. That is, by attaching the addressed wireless IC tag to several tens of thousands to hundreds of thousands of pipe welded portions, it is possible to identify the location where the abnormality has occurred in the entire plant.

また、配管溶接部に対する無線ＩＣタグの取り付け作業の効率化、及び異常検出精度の向上のために、無線ＩＣタグのセンサーを帯状のテープ又はシート状のものに、予め適切な間隔で配置しておき、これを監視対象部位に取り付けるようにしている。   In addition, in order to improve the efficiency of attaching the wireless IC tag to the pipe weld and improve the abnormality detection accuracy, the wireless IC tag sensor is placed in advance on a strip of tape or sheet at appropriate intervals. This is attached to the monitored part.

以下、本発明の実施の形態について図面を用いて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、配管溶接部又はオリフィス設置部分に取り付ける無線ＩＣタグ付きセンサーを示す図である。図中、１は配管、２は配管溶接部又はオリフィス、３はテープ又はシート、４は無線ＩＣタグ付きセンサーを示している。帯状のテープ又はシート３上には、無線ＩＣタグ付きセンサー４が適切な間隔で一列状に配置されている。この無線ＩＣタグ付きセンサー４の間隔は、テープ又はシート３を配管に環状に巻きつけた際に、配管溶接部又はオリフィス２の一周分を探知して、その亀裂や肉厚を検出できるよう設定されている。なお、測定対象がオリフィスの場合には、配管内の流体の流れ方向から見てオリフィスの下流側に無線ＩＣタグ付きセンサー４を設置する。   FIG. 1 is a diagram showing a sensor with a wireless IC tag attached to a pipe weld or an orifice installation part. In the figure, 1 is a pipe, 2 is a pipe weld or orifice, 3 is a tape or sheet, and 4 is a sensor with a wireless IC tag. On the belt-like tape or sheet 3, sensors 4 with wireless IC tags are arranged in a line at appropriate intervals. The interval of the sensor 4 with the wireless IC tag is set so that when the tape or the sheet 3 is wound around the pipe in an annular shape, the pipe welded portion or the orifice 2 is detected and the crack and the thickness can be detected. Has been. When the measurement object is an orifice, the sensor 4 with the wireless IC tag is installed on the downstream side of the orifice as viewed from the fluid flow direction in the pipe.

図２は、本発明の他の実施例であり、配管溶接部又はオリフィス設置部分に取り付ける無線ＩＣタグ付きセンサーを示す図である。本実施例では、無線ＩＣタグ付きセンサー４を帯状のテープ又はシート３上に複数列に配置している。すなわち、帯状のテープ又はシート３上に複数列に配置することで、テープまたはシート３を配管１の配管溶接部又はオリフィス２に沿って取り付けた際、配管内流体の流れ方向から見て配管溶接部又はオリフィス２の前後を含めたより広範囲を探知可能となる。   FIG. 2 is a diagram showing a sensor with a wireless IC tag attached to a pipe welded portion or an orifice installation portion, which is another embodiment of the present invention. In this embodiment, the wireless IC tag-attached sensors 4 are arranged in a plurality of rows on a strip-shaped tape or sheet 3. That is, by arranging the tapes or sheets 3 in a plurality of rows on the strip-shaped tape or sheet 3, when the tapes or sheets 3 are attached along the pipe welding portion or the orifice 2 of the pipe 1, the pipe welding is seen from the flow direction of the fluid in the pipe. It becomes possible to detect a wider range including the front and back of the part or the orifice 2.

図３は、本発明の他の実施例であり、配管溶接部又はオリフィス設置部分に取り付ける無線ＩＣタグ付きセンサーを示す図である。本実施例では、テープ又はシート３を配管１に取り付けた際に、無線ＩＣタグ付きセンサー４がテープ又はシート３と配管１との間、つまりテープ又はシート３の内面側に位置するように無線ＩＣタグ付きセンサー４を配置している。このように構成したことで、外気による無線ＩＣタグ付きセンサー４の腐食や劣化を抑制することができる。また、配管１を運搬する際にテープ又はシート３によって無線ＩＣタグ付きセンサー４を保護することも可能となる。   FIG. 3 is a view showing a sensor with a wireless IC tag which is another embodiment of the present invention and is attached to a pipe welded portion or an orifice installation portion. In this embodiment, when the tape or sheet 3 is attached to the pipe 1, the wireless IC-tagged sensor 4 is wireless so that it is positioned between the tape or sheet 3 and the pipe 1, that is, on the inner surface side of the tape or sheet 3. A sensor 4 with an IC tag is arranged. By comprising in this way, corrosion and deterioration of the sensor 4 with a wireless IC tag by external air can be suppressed. In addition, the sensor 4 with the wireless IC tag can be protected by the tape or the sheet 3 when the pipe 1 is transported.

以上の各実施例にて説明したように、本発明では無線ＩＣタグに配管溶接部の亀裂の進展具合、配管肉厚を検出する為のセンサー機能を付け、このＩＣタグを事前に配管溶接部などの点検対象部位に設置している。そして、プラント運転中に多くの溶接箇所の点検を容易に行うことが可能な複数のＩＣタグからのセンサー信号を中継の受信機で受けて、異常の有無及び場所を検知するようにしている。   As described in the above embodiments, in the present invention, the wireless IC tag is provided with a sensor function for detecting the progress of cracks in the pipe welded portion and the pipe wall thickness. It is installed in the inspection target part. Then, sensor signals from a plurality of IC tags capable of easily inspecting a large number of welding points during plant operation are received by a relay receiver to detect the presence and location of an abnormality.

なお、一つのセンサーで監視できる範囲は限られており、監視精度の向上を図るために、点検対象部位が溶接部監視の場合は線状に、減肉監視の場合は面状に複数のセンサーを取り付ける。また、精度良く効率よく監視するためにはセンサーを適切な間隔で正確に取り付けることが必要である。この取り付けを容易にするために、テープ又はシートにＩＣタグ付きセンサーを規則正しく並べ、これを対象部位に取り付ける。   The range that can be monitored by a single sensor is limited, and in order to improve the monitoring accuracy, a plurality of sensors are arranged in a linear shape when the inspection target site is a welded portion monitoring, and in a planar shape when a thinning monitoring is performed. Install. In addition, in order to monitor accurately and efficiently, it is necessary to attach the sensors accurately at appropriate intervals. In order to facilitate this attachment, sensors with IC tags are regularly arranged on a tape or sheet and attached to the target site.

以上のように構成することにより、運転中の亀裂・減肉の進展状況等をプラント全体に渡り、無線ＩＣタグを使い監視することが可能になり、亀裂・減肉が進む前に定検時に補修することで、予定外のプラント停止を防止することができる。   By configuring as described above, it becomes possible to monitor the progress of cracks and thinning during operation throughout the plant using wireless IC tags, and at the regular inspection before cracks and thinning proceed By repairing, unscheduled plant stoppage can be prevented.

また、無線ＩＣタグ付きセンサーをテープ又はシートにあらかじめ適切な間隔で設置しておいたものを取り付けることで、取り付け作業の効率化及び検出精度の向上が図れる。   In addition, by attaching a sensor having a wireless IC tag attached to a tape or sheet in advance at an appropriate interval, it is possible to improve the efficiency of attachment work and improve detection accuracy.

配管溶接部又はオリフィス設置部分に取り付ける無線ＩＣタグ付きセンサーを示す図。The figure which shows the sensor with a radio | wireless IC tag attached to a piping welding part or an orifice installation part. 配管溶接部又はオリフィス設置部分に取り付ける無線ＩＣタグ付きセンサーを示す図。The figure which shows the sensor with a radio | wireless IC tag attached to a piping welding part or an orifice installation part. 配管溶接部又はオリフィス設置部分に取り付ける無線ＩＣタグ付きセンサーを示す図。The figure which shows the sensor with a radio | wireless IC tag attached to a piping welding part or an orifice installation part.

符号の説明Explanation of symbols

１…配管、２…配管溶接部又はオリフィス、３…テープ又はシート、４…無線ＩＣタグ付きセンサー。
DESCRIPTION OF SYMBOLS 1 ... Pipe, 2 ... Pipe welding part or orifice, 3 ... Tape or sheet, 4 ... Sensor with a wireless IC tag.

Claims (5)

配管溶接部の状態を監視する配管状態監視装置において、
センサーを備えたＩＣタグを帯状のテープ又はシート上に複数配置し、この帯状のテープ又はシートを配管溶接部に沿って環状に取り付けるように構成したことを特徴とする配管状態監視装置。 In the pipe condition monitoring device that monitors the condition of the pipe weld,
A piping state monitoring device, wherein a plurality of IC tags provided with sensors are arranged on a belt-like tape or sheet, and the belt-like tape or sheet is annularly attached along a pipe welding portion. 前記ＩＣタグは、前記帯状のテープ又はシート上に複数列に配置され、該帯状のテープ又はシートを配管溶接部に沿って環状に取り付けた際に、配管内流体の流れ方向に対して配管溶接部の前後に位置するように前記ＩＣタグが設けられていることを特徴とする請求項１に記載の配管状態監視装置。   The IC tags are arranged in a plurality of rows on the belt-like tape or sheet, and when the belt-like tape or sheet is annularly attached along the pipe welding portion, pipe welding is performed with respect to the flow direction of the fluid in the pipe. The piping status monitoring device according to claim 1, wherein the IC tag is provided so as to be positioned before and after the section. 前記ＩＣタグは、前記帯状のテープ又はシートが前記配管溶接部に取り付けられた際に、その内面側に位置するように構成されていることを特徴とする請求項１に記載の配管状態監視装置。   2. The piping state monitoring device according to claim 1, wherein the IC tag is configured to be positioned on an inner surface side when the belt-like tape or sheet is attached to the piping welding portion. . 前記ＩＣタグは、各ＩＣタグ毎にアドレスデータを有することを特徴とする請求項１に記載の配管状態監視装置。   The piping status monitoring device according to claim 1, wherein the IC tag has address data for each IC tag. 前記ＩＣタグは、無線ＩＣタグであり、センサーで検出された検出データは超音波受信装置によって読み取られるように構成されていることを特徴とする請求項１に記載の配管状態監視装置。

The piping status monitoring device according to claim 1, wherein the IC tag is a wireless IC tag, and detection data detected by a sensor is read by an ultrasonic receiving device.

JP2005100482A 2005-03-31 2005-03-31 Pipe condition monitoring device Pending JP2006283776A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009041924A (en) * 2007-08-06 2009-02-26 Yokogawa Electric Corp Flowmeter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009041924A (en) * 2007-08-06 2009-02-26 Yokogawa Electric Corp Flowmeter

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