JP2008116228A - Continuity inspection device - Google Patents

Continuity inspection device Download PDF

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JP2008116228A
JP2008116228A JP2006297409A JP2006297409A JP2008116228A JP 2008116228 A JP2008116228 A JP 2008116228A JP 2006297409 A JP2006297409 A JP 2006297409A JP 2006297409 A JP2006297409 A JP 2006297409A JP 2008116228 A JP2008116228 A JP 2008116228A
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continuity
external
bond line
gas
connection
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JP4797933B2 (en
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Hideaki Wakabayashi
英明 若林
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JFE Koken Co Ltd
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JFE Koken Co Ltd
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  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent generation of sparks by stray current or protective current, when cutting a gas conduit, while surely detecting the connection of the bonding wires to be connected to both sides of the cutting part of the gas conduit, with the gas conduit. <P>SOLUTION: A magnet holder 20 and a connecting member 21, set via an insulator member 22, of a connection adapter 19 mounted on the ends of external bonding wires 17a, 17b and power cables 18a, 18b, are closely fitted to gas conduits 2a, 2b which are both side parts of the cut part 2c of the gas conduit. Continuity between the magnet holder 20 and the connecting member 21 is secured by the gas conduits 2a, 2b, to excite coils X1 and X2 of the relays 9a and 9b. The safety in the cutting operation is improved, by recognizing the short circuit state between the gas conduits 2a and 2b, which are at both sides of the cut part 2c of the gas conduit, using the external bonding wires 17a, 17b and an internal bonding wire 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、鋼管からなるガス導管を切断するとき、切断個所の両側を接続する短絡線の接続確認を行う導通検査装置に関するものである。   The present invention relates to a continuity inspection device for confirming connection of a short-circuit line connecting both sides of a cutting portion when a gas conduit made of a steel pipe is cut.

鋼管からなるガス導管の一部を取り替えたり、不要になった分岐管を撤去するためガス導管の一部を切断するとき、切断するガス導管の元栓を閉じてガスの供給を一時中止したり、遮断装置やガスバック等で切断する部分のガスを遮断しても、切断する部分に微量のガスが滞留する危険性がある。電気防食を行っているガス導管や迷走電流の影響があるガス導管を切断するとき、切断する部分にガスが滞留していると、切断時の防食電流や迷走電流によるスパークにより滞留しているガスが引火する危険性がある。   When replacing a part of a gas pipe made of steel pipe, or cutting a part of a gas pipe to remove a branch pipe that is no longer needed, the main plug of the gas pipe to be cut is closed and the gas supply is temporarily stopped. Even if the gas to be cut is cut off by a shut-off device or a gas bag, there is a risk that a trace amount of gas may remain in the cut portion. When cutting gas conduits that are subjected to electrocorrosion protection or gas conduits that are affected by stray currents, if the gas stays in the part to be cut, the gas is retained due to sparks due to corrosion protection current or stray current at the time of cutting. There is a risk of fire.

この危険性を未然に防ぐため、非特許文献１に示すように、防食電流が流れているガス導管や迷走電流の影響があるガス導管を切断する場合、図４に示すように、ガス導管２の切断する部分２ｃの両側のガス導管２ａ，２ｂに短絡線（以下、ボンド線という）２４を接続し、防食電流や迷走電流を流すようにしている。このガス導管２ａ，２ｂにボンド線２４を接続する場合、接続する鋼面を研磨して、ボンド線２４の両端に設けた磁力がオン・オフできるマグネットホルダ２０によりボンド線２４をガス導管２ａ，２ｂに接続している。
供給管・内管指針（工事編） 社団法人日本ガス協会 平成１１年 In order to prevent this danger, as shown in Non-Patent Document 1, when a gas conduit in which an anticorrosion current flows or a gas conduit affected by stray current is cut, as shown in FIG. A short-circuit wire (hereinafter referred to as a bond wire) 24 is connected to the gas conduits 2a and 2b on both sides of the portion 2c to be cut, so that the anticorrosion current and the stray current flow. When connecting the bond wires 24 to the gas conduits 2a and 2b, the steel surfaces to be connected are polished, and the bond wires 24 are connected to the gas conduits 2a, 2 by the magnet holders 20 that can turn on / off the magnetic force provided at both ends of the bond wires 24. Connected to 2b.
Supply and Inner Pipeline Guidelines (Construction) Japan Gas Association 1999

前記のようにボンド線２４をガス導管２ａ，２ｂに接続するためにマグネットホルダ２０を接続する鋼面に吸着させる場合、接続する鋼面の表面に絶縁物の薄膜が存在していてもマグネットホルダ２０は鋼面に吸着してしまう。このような場合、ガス導管１に流れている防食電流や迷走電流をボンド線３に流すことはできず、ガス導管１を切断するときのスパークによりガス導管１内に滞留しているガスが引火するおそれがある。   In the case where the bond wire 24 is adsorbed on the steel surface to which the magnet holder 20 is connected in order to connect the bond wire 24 to the gas conduits 2a and 2b, the magnet holder is provided even if an insulating thin film exists on the surface of the steel surface to be connected. 20 adsorbs to the steel surface. In such a case, the anticorrosion current and stray current flowing in the gas conduit 1 cannot be passed through the bond line 3, and the gas staying in the gas conduit 1 is ignited by the spark when the gas conduit 1 is cut. There is a risk.

この発明は、このような問題を確実に解消するために、ガス導管の切断する部分の両側に接続するボンド線がガス導管に接続されたことを確実に検出し、ガス導管を切断するとき、防食電流や迷走電流によるスパークが発生することを防止する導通検査装置を提供することを目的とするものである。   In order to reliably eliminate such a problem, the present invention reliably detects that the bond line connected to both sides of the cut portion of the gas conduit is connected to the gas conduit, and disconnects the gas conduit. It is an object of the present invention to provide a continuity test apparatus that prevents the occurrence of sparks due to anticorrosion current or stray current.

この発明の導通検査装置は、導通検出回路及び警報回路を有する導通検出器と２対の接続ケーブルを有し、前記導通検出回路は、電源としての電池と電源スイッチと２つのリレー及び両端が外部端子に接続された内部ボンド線を有し、前記電池のプラス側は前記電源スイッチを介して前記２つのリレーのコイルの一方の端子に接続され、各コイルの他方の端子はダイオードを介して外部端子に接続され、前記電池のマイナス側は内部ボンド線の中間部に接続され、前記警報回路は前記各リレーのコイルが励磁したとき開になる接点に接続された警報ランプと警報ブザーを有し、前記２対の接続ケーブルは、前記内部ボンド線が接続された外部端子に接続される外部ボンド線と、前記ダイオードが接続された外部端子に接続された電源ケーブルと、前記外部ボンド線と電源ケーブルの端部に設けられた接続アダプタとを有し、前記接続アダプタは、前記外部ボンド線が接続されたマグネットホルダと、前記電源ケーブルが接続された接続部材と、前記マグネットホルダと接続部材の間に設けられた絶縁部材を有することを特徴とする。   The continuity inspection device of the present invention has a continuity detector having a continuity detection circuit and an alarm circuit, and two pairs of connection cables. The continuity detection circuit has a battery as a power source, a power switch, two relays, and both ends externally. A positive side of the battery is connected to one terminal of the two relay coils via the power switch, and the other terminal of each coil is externally connected via a diode. Connected to the terminal, the negative side of the battery is connected to the middle part of the internal bond line, and the alarm circuit has an alarm lamp and an alarm buzzer connected to a contact that opens when the coil of each relay is excited. The two pairs of connection cables include an external bond line connected to the external terminal to which the internal bond line is connected, and a power cable connected to the external terminal to which the diode is connected. The external bond line and a connection adapter provided at the end of the power cable, the connection adapter includes a magnet holder to which the external bond line is connected, a connection member to which the power cable is connected, It has an insulating member provided between the magnet holder and a connecting member.

前記電池の残容量を検出する電圧計測手段を有すると良い。また、前記内部ボンド線に流れる電流を検出する電流計測手段を有することが望ましい。   It is preferable to have voltage measuring means for detecting the remaining capacity of the battery. Moreover, it is desirable to have a current measuring means for detecting a current flowing through the internal bond line.

この発明は、外部ボンド線と電源ケーブルの端部に取り付けた接続アダプタの絶縁部材を介して設けたマグネットホルダと接続部材をガス導管の切断する部分の両側のガス導管に密着させて、マグネットホルダと接続部材をガス導管で導通させてリレーのコイルを励磁させ、外部ボンド線がガス導管の切断する部分の両側のガス導管に接続されていることを確実に検出して、外部ボンド線と内部ボンド線でガス導管の切断する部分の両側のガス導管を短絡していることを確認することができ、切断作業の安全性を高めることができる。   The present invention relates to a magnet holder in which a magnet holder provided via an insulating member of a connection adapter attached to an end of an external bond line and a power cable and a connection member are closely attached to gas conduits on both sides of a portion of the gas conduit to be cut. And the connection member through the gas conduit to excite the coil of the relay and reliably detect that the external bond wire is connected to the gas conduit on both sides of the cut portion of the gas conduit. It can be confirmed that the gas conduits on both sides of the cut portion of the gas conduit are short-circuited by the bond line, and the safety of the cutting operation can be improved.

また、電圧計測手段で電池の残容量を検出することにより、安定して外部ボンド線がガス導管の切断する部分の両側のガス導管に接続されていること確認することができる。   Further, by detecting the remaining capacity of the battery with the voltage measuring means, it can be confirmed that the external bond line is stably connected to the gas conduits on both sides of the portion where the gas conduit is cut.

さらに、電流計測手段で内部ボンド線に流れる電流を検出することにより、ガス導管の切断する部分の両側のガス導管が外部ボンド線と内部ボンド線で短絡していることを確実に確認することができる。   Furthermore, by detecting the current flowing through the internal bond line with the current measuring means, it is possible to reliably confirm that the gas conduits on both sides of the cut portion of the gas conduit are short-circuited between the external bond line and the internal bond line. it can.

図１はこの発明の導通検査装置の構成を示す回路図である。図に示すように、導通検査装置１は、ガス導管２の切断する部分２ｃの両側のガス導管２ａ，２ｂにボンド線が確実に接続されているか否を検出するものであり、導通検出器３と２対の接続ケーブル４ａ，４ｂを有する。導通検出器３は導通検出回路５及び警報回路６を有する。   FIG. 1 is a circuit diagram showing a configuration of a continuity test apparatus according to the present invention. As shown in the figure, the continuity test apparatus 1 detects whether or not a bond line is securely connected to the gas conduits 2a and 2b on both sides of the portion 2c of the gas conduit 2 to be cut. And two pairs of connection cables 4a and 4b. The continuity detector 3 has a continuity detection circuit 5 and an alarm circuit 6.

導通検出回路５は、電源としての電池７ａ，７ｂと電源スイッチ８と２つのリレー９ａ，９ｂ及び内部ボンド線１０を有する。電池７ａのプラス側は電源スイッチ８を介して各リレー９ａ，９ｂの抵抗ＲとコンデンサＣが並列に接続されたコイルＸ１，Ｘ２の一方の端子に接続され、各コイルＸ１，Ｘ２の他方の端子は、ガス導管２に流れる防食電流や迷走電流を阻止するダイオードＤ１，Ｄ２を介して外部端子１１ａ，１１ｂに接続され、電池７ａのマイナス側は内部ボンド線１０の中間部に接続されている。また、電池７ａの残容量を検出する電圧計測手段１２のプラス側が電源スイッチ８とコイルＸ１，Ｘ２の間に接続され、マイナス側がガス導管２に流れる防食電流や迷走電流を阻止するダイオードＤ３を介して電池７ａのマイナス側に接続されている。また、例えば、電池７ｂから電源電圧を供給して内部ボンド線１０に流れる電流を検出するカレントプローブからなる電流計測手段１３を有する。内部ボンド線１０は両端がそれぞれ外部端子１４ａ，１４ｂに接続されている   The continuity detection circuit 5 includes batteries 7 a and 7 b as power sources, a power switch 8, two relays 9 a and 9 b, and an internal bond line 10. The positive side of the battery 7a is connected via a power switch 8 to one terminal of coils X1 and X2 in which the resistors R and capacitors C of the relays 9a and 9b are connected in parallel, and the other terminal of each coil X1 and X2. Are connected to the external terminals 11a and 11b via the diodes D1 and D2 that block the anticorrosive current and stray current flowing through the gas conduit 2, and the negative side of the battery 7a is connected to the middle part of the internal bond line 10. Further, the positive side of the voltage measuring means 12 for detecting the remaining capacity of the battery 7a is connected between the power switch 8 and the coils X1 and X2, and the negative side is connected via a diode D3 for preventing the anticorrosive current and stray current flowing through the gas conduit 2. And connected to the negative side of the battery 7a. Further, for example, it has a current measuring means 13 including a current probe that supplies a power supply voltage from the battery 7 b and detects a current flowing through the internal bond line 10. Both ends of the internal bond line 10 are connected to the external terminals 14a and 14b, respectively.

警報回路６は一方のリレー９ａのコイルＸ１が励磁したとき開になる接点Ｘ１１に接続された警報ランプ１５ａと、他方のリレー９ｂのコイルＸ２が励磁したとき開になる接点Ｘ２１に接続された警報ランプ１５ｂと、コイルＸ１が励磁したとき開になる接点Ｘ１２とコイルＸ２が励磁したとき開になる接点Ｘ２２にそれぞれ接続された警報ブザー１６を有する。   The alarm circuit 6 has an alarm lamp 15a connected to the contact X11 that opens when the coil X1 of one relay 9a is excited, and an alarm connected to the contact X21 that opens when the coil X2 of the other relay 9b is excited. The alarm buzzer 16 is connected to the lamp 15b, the contact X12 that opens when the coil X1 is excited, and the contact X22 that opens when the coil X2 is excited.

接続ケーブル４ａ，４ｂは、内部ボンド線１０が接続された外部端子１４ａ，１４ｂに接続された外部ボンド線１７ａ，１７ｂと、ダイオードＤ１，Ｄ２がそれぞれ接続された外部端子１１ａ，１１ｂに接続された電源ケーブル１８ａ，１８ｂと、外部ボンド線１７ａと電源ケーブル１８ａの端部に設けられた接続アダプタ１９ａと、外部ボンド線１７ｂと電源ケーブル１８ｂの端部に設けられた接続アダプタ１９ｂを有する。接続アダプタ１９ａ，１９ｂは、外部ボンド線１７ａ，１７ｂがそれぞれ接続され、磁力がオン・オフできて導電性を有するマグネットホルダ２０と、電源ケーブル１８ａ，１８ｂがそれぞれ接続された導電性を有する接続部材２１と、マグネットホルダ２０と接続部材２１の間に設けられた絶縁部材２２を有する。この２対の接続ケーブル４ａ，４ｂは色分けし、例えば接続ケーブル４ａを赤色とし、接続ケーブル４ｂを青色として識別できるようになっている。   The connection cables 4a and 4b are connected to external bond lines 17a and 17b connected to the external terminals 14a and 14b to which the internal bond line 10 is connected, and external terminals 11a and 11b to which the diodes D1 and D2 are connected, respectively. The power supply cables 18a and 18b, the external bond line 17a and the connection adapter 19a provided at the end of the power supply cable 18a, and the external bond line 17b and the connection adapter 19b provided at the end of the power supply cable 18b are provided. The connection adapters 19a and 19b are connected to the external bond wires 17a and 17b, can be turned on / off, and have conductivity. The conductive magnet holder 20 is connected to the power cables 18a and 18b. 21 and an insulating member 22 provided between the magnet holder 20 and the connecting member 21. The two pairs of connection cables 4a and 4b are color-coded so that, for example, the connection cable 4a can be identified as red and the connection cable 4b can be identified as blue.

この導通検査装置１を使用してガス導管２の切断する部分２ｃの両側のガス導管２ａ，２ｂに接続ケーブル４ａ，４ｂを接続して外部ボンド線１７ａ，１７ｂとガス導管２ａ，２ｂの間が導通しているかどうかを検出するときの動作を説明する。   The connection cables 4a and 4b are connected to the gas conduits 2a and 2b on both sides of the portion 2c to be cut of the gas conduit 2 by using the continuity testing device 1, and the space between the external bond lines 17a and 17b and the gas conduits 2a and 2b is connected. The operation when detecting whether or not conduction is made will be described.

まず、接続ケーブル４ａ，４ｂの外部ボンド線１７ａ，１７ｂを導通検出器３の外部端子１４ａ，１４ｂにそれぞれ接続し、電源ケーブル１８ａ，１８ｂを外部端子１１ａ，１１ｂにそれぞれ接続する。この状態で接続アダプタ１９ａ，１９ｂを１枚の鉄板に取り付けて電源スイッチ８をオンにする。電源スイッチ８をオンにすると、リレー９ａのコイルＸ１に電池７ａから内部ボンド線１０とマグネットホルダ２０と鉄板と接続部材２１及び電源ケーブル１８ａを通って電流が流れリレー９ａを励磁して各接点Ｘ１１，Ｘ１２を開にする。また、リレー９ｂのコイルＸ２にも電池７ａから内部ボンド線１０とマグネットホルダ２０と鉄板と接続部材２１及び電源ケーブル１８ｂを通って電流が流れリレー９ｂを励磁して各接点Ｘ２１，Ｘ２２を開にする。このリレー９ａ，９ｂのコイルＸ１，Ｘ２に電流が流れたことを警報ランプ１５ａと警報ランプ１５ｂが点灯しないで警報ブザー１６も鳴らないことにより確認する。また、電圧計測手段１２で計測した電池７ａの電圧が所定の電圧以上であることを確認する。その後、一方の接続アダプタ１９ａを鉄板から取り外してリレー９ａのコイルＸ１に流れている電流を遮断したとき警報ランプ１５ａが点灯し、警報ブザー１６が鳴ることを確認する。そして接続アダプタ１９ａを鉄板に取り付け、他方の接続アダプタ１９ｂを鉄板から取り外してリレー９ｂのコイルＸ２に流れている電流を遮断したとき警報ランプ１５ｂが点灯し、警報ブザー１６が鳴ることを確認して導通検査装置１が正常に動作していることを確認する。   First, the external bond lines 17a and 17b of the connection cables 4a and 4b are connected to the external terminals 14a and 14b of the continuity detector 3, respectively, and the power cables 18a and 18b are connected to the external terminals 11a and 11b, respectively. In this state, the connection adapters 19a and 19b are attached to one iron plate, and the power switch 8 is turned on. When the power switch 8 is turned on, a current flows from the battery 7a to the coil X1 of the relay 9a through the internal bond wire 10, the magnet holder 20, the iron plate, the connecting member 21, and the power cable 18a to excite the relay 9a, and each contact X11. , X12 is opened. In addition, current flows from the battery 7a to the coil X2 of the relay 9b through the internal bond wire 10, the magnet holder 20, the iron plate, the connecting member 21 and the power cable 18b, thereby exciting the relay 9b to open the contacts X21 and X22. To do. It is confirmed that the current flows through the coils X1 and X2 of the relays 9a and 9b by not turning on the alarm lamp 15a and the alarm lamp 15b and the alarm buzzer 16 from sounding. Further, it is confirmed that the voltage of the battery 7a measured by the voltage measuring means 12 is equal to or higher than a predetermined voltage. Thereafter, it is confirmed that when one connection adapter 19a is removed from the iron plate and the current flowing through the coil X1 of the relay 9a is cut off, the alarm lamp 15a is turned on and the alarm buzzer 16 sounds. When the connection adapter 19a is attached to the iron plate and the other connection adapter 19b is removed from the iron plate and the current flowing through the coil X2 of the relay 9b is cut off, the alarm lamp 15b is turned on and the alarm buzzer 16 sounds. It is confirmed that the continuity testing device 1 is operating normally.

この導通検査装置１の動作を確認した後、ガス導管２ａ，２ｂの接続アダプタ１９ａ，１９ｂを取り付ける部分の鋼面を研磨し、研磨した部分に接続アダプタ１９ａ，１９ｂを密着させてマグネットホルダ２０の磁力をオンにしてガス導管２ａ，２ｂにマグネットホルダ２０を吸着させる。この状態で電源スイッチ８をオンにする。この電源スイッチ８をオンにしたとき、ガス導管２ａ，２ｂの研磨した部分に絶縁物等がなく接続アダプタ１９ａ，１９ｂのマグネットホルダ２０と接続部材２１がガス導管２ａ，２ｂの鋼面に直接接触していると、マグネットホルダ２０と接続部材２１の間はガス導管２ａ，２ｂの鋼面により導通する。したがってリレー９ａのコイルＸ１に電源７ａから内部ボンド線１０とマグネットホルダ２０とガス導管２ａと接続部材２１及び電源ケーブル１８ａを通って電流が流れてリレー９ａを励磁する。また、リレー９ｂのコイルＸ２に電源７ａから内部ボンド線１０とマグネットホルダ２０とガス導管２ｂと接続部材２１及び電源ケーブル１８ｂを通って電流が流れてリレー９ｂを励磁して各接点Ｘ１１，Ｘ１２，Ｘ２１，Ｘ２２を開にする。したがって警報ランプ１５ａと警報ランプ１５ｂを点灯しないで警報ブザー１６を鳴らさないとともに、電流計測手段１３で内部ボンド線１０に流れている防食電流等を検出することができ、マグネットホルダ２０と接続部材２１がガス導管２ａ，２ｂの鋼面に確実に接触して、外部ボンド線１７ａ，１７ｂと内部ボンド線１０でガス導管２ａ，２ｂを短絡していることを確認することができ、切断作業の安全性を高めることができる。   After confirming the operation of the continuity test apparatus 1, the steel surface of the portion to which the connection adapters 19a and 19b of the gas conduits 2a and 2b are attached is polished, and the connection adapters 19a and 19b are brought into close contact with the polished portions. The magnet holder 20 is attracted to the gas conduits 2a and 2b by turning on the magnetic force. In this state, the power switch 8 is turned on. When the power switch 8 is turned on, the polished parts of the gas conduits 2a and 2b are free of insulation and the magnet holder 20 and the connection member 21 of the connection adapters 19a and 19b are in direct contact with the steel surfaces of the gas conduits 2a and 2b. In this case, the magnet holder 20 and the connection member 21 are electrically connected by the steel surfaces of the gas conduits 2a and 2b. Therefore, current flows from the power source 7a to the coil X1 of the relay 9a through the internal bond wire 10, the magnet holder 20, the gas conduit 2a, the connecting member 21, and the power cable 18a to excite the relay 9a. Further, a current flows from the power source 7a to the coil X2 of the relay 9b through the internal bond wire 10, the magnet holder 20, the gas conduit 2b, the connecting member 21 and the power cable 18b to excite the relay 9b to thereby activate the respective contacts X11, X12, X21 and X22 are opened. Therefore, the alarm buzzer 16 is not sounded without turning on the alarm lamp 15a and the alarm lamp 15b, and the anticorrosion current flowing through the internal bond wire 10 can be detected by the current measuring means 13, and the magnet holder 20 and the connecting member 21 can be detected. Is surely in contact with the steel surfaces of the gas conduits 2a and 2b and the external bond wires 17a and 17b and the internal bond wire 10 are short-circuited with the gas conduits 2a and 2b. Can increase the sex.

また、ガス導管２ａ，２ｂの研磨した部分のいずれか一方、例えば接続アダプタ１９ａを取り付ける部分に絶縁物等が存在し接続アダプタ１９ａのマグネットホルダ２０と接続部材２１がガス導管２ａの鋼面に直接接触しないと、リレー９ａのコイルＸ１には電流が流れなく、各接点Ｘ１１，Ｘ１２は閉のままで警報ランプ１５ａを点灯し、警報ブザー１６を鳴らして、ガス導管２ａに対する接触不良であることを知らせる。このようにしてガス導管２ａ，２ｂのいずれかに接続アダプタ１９ａ，１９ｂの接触不良があるかを検出することができる。また、ガス導管２の切断する部分２ｃを切断中に、何らかしらの原因によりガス導管２ａ，２ｂのいずれか一方に対する接触不良が生じた場合も、そのことを警報ランプ１５ａ，１５ｂと警報ブザー１６で報知することができ、切断作業の安全性を高めることができる。   In addition, an insulator or the like is present in one of the polished portions of the gas conduits 2a and 2b, for example, a portion to which the connection adapter 19a is attached, and the magnet holder 20 and the connection member 21 of the connection adapter 19a are directly on the steel surface of the gas conduit 2a. If the contact does not occur, no current flows through the coil X1 of the relay 9a, the contacts X11 and X12 remain closed, the alarm lamp 15a is turned on, the alarm buzzer 16 is sounded, and the contact with the gas conduit 2a is poor. Inform. In this way, it is possible to detect whether there is a contact failure of the connection adapters 19a, 19b in either of the gas conduits 2a, 2b. Further, when a contact failure occurs with respect to either one of the gas conduits 2a and 2b due to some cause during the cutting of the portion 2c of the gas conduit 2, the alarm lamps 15a and 15b and the alarm buzzer 16 So that the safety of the cutting work can be improved.

前記説明では、接続アダプタ１９ａ，１９ｂは、電源ケーブル１８ａ，１８ｂを接続した接続部材２１をマグネットホルダ２０の磁力によりガス導管２ａ，２ｂに接触させる場合について説明したが、図２に示すように、接続部材２１として外枠２１１内に摺動自在な接触片２１２を設け、接触片２１２と電源ケーブル１８の接続部２１３の間にコイルばね２１４を設け、マグネットホルダ２０をガス導管２ａ，２ｂに吸着したとき、コイルばね２１３の弾性力で接触片２１２をガス導管２ａ，２ｂに圧接するようにしても良い。   In the above description, the connection adapters 19a and 19b explained the case where the connection member 21 connected to the power cables 18a and 18b is brought into contact with the gas conduits 2a and 2b by the magnetic force of the magnet holder 20, but as shown in FIG. A slidable contact piece 212 is provided in the outer frame 211 as the connection member 21, a coil spring 214 is provided between the contact piece 212 and the connection portion 213 of the power cable 18, and the magnet holder 20 is attracted to the gas conduits 2 a and 2 b. In this case, the contact piece 212 may be pressed against the gas conduits 2a and 2b by the elastic force of the coil spring 213.

また、前記説明では、電圧計測手段１２で計測した電池７ａの電圧値により電池７ａの残容量を判断する場合について説明したが、図３に示すように電圧計測手段１２と共にレベル計２３を設け、電池７ａの電圧がレベル計２３の所定の範囲にあるとき、電池７ａの残容量が正常であると判断するようにしても良い。   In the above description, the case where the remaining capacity of the battery 7a is determined based on the voltage value of the battery 7a measured by the voltage measuring means 12 has been described. However, as shown in FIG. When the voltage of the battery 7a is within a predetermined range of the level meter 23, it may be determined that the remaining capacity of the battery 7a is normal.

この発明の導通検査装置の構成を示す回路図である。It is a circuit diagram which shows the structure of the continuity inspection apparatus of this invention. 接続アダプタの構成図である。It is a block diagram of a connection adapter. 第２の導通検査装置の構成を示す回路図である。It is a circuit diagram which shows the structure of a 2nd continuity inspection apparatus. ガス導管を切断するときのボンド線を示す配置図である。It is an arrangement drawing showing a bond line when cutting a gas conduit.

符号の説明Explanation of symbols

１；導通検査装置、２；ガス導管、３；導通検出器、４；接続ケーブル、
５；導通検出回路、６；警報回路、７；電池、８；電源スイッチ、９；リレー、
１０；内部ボンド線、１１；外部端子、１２；電圧計測手段、１３；電流計測手段、
１４；外部端子、１５；警報ランプ、１６；警報ブザー、１７；外部ボンド線
１８；電源ケーブル、１９；接続アダプタ、２０；マグネットホルダ、
２１；接続部材、２２；絶縁部材、Ｘ１，Ｘ２；リレーのコイル。 1; Continuity testing device, 2; Gas conduit, 3; Continuity detector, 4; Connection cable,
5; continuity detection circuit, 6; alarm circuit, 7; battery, 8; power switch, 9; relay,
10: Internal bond wire, 11: External terminal, 12: Voltage measuring means, 13: Current measuring means,
14; external terminal, 15; alarm lamp, 16; alarm buzzer, 17; external bond line 18; power cable, 19; connection adapter, 20; magnet holder,
21; connecting member, 22; insulating member, X1, X2; relay coil.

Claims (3)

導通検出回路及び警報回路を有する導通検出器と２対の接続ケーブルを有し、
前記導通検出回路は、電源としての電池と電源スイッチと２つのリレー及び両端が外部端子に接続された内部ボンド線を有し、前記電池のプラス側は前記電源スイッチを介して前記２つのリレーのコイルの一方の端子に接続され、各コイルの他方の端子はダイオードを介して外部端子に接続され、前記電池のマイナス側は内部ボンド線の中間部に接続され、
前記警報回路は前記各リレーのコイルが励磁したとき開になる接点に接続された警報ランプと警報ブザーを有し、
前記２対の接続ケーブルは、前記内部ボンド線が接続された外部端子に接続される外部ボンド線と、前記ダイオードが接続された外部端子に接続された電源ケーブルと、前記外部ボンド線と電源ケーブルの端部に設けられた接続アダプタとを有し、前記接続アダプタは、前記外部ボンド線が接続されたマグネットホルダと、前記電源ケーブルが接続された接続部材と、前記マグネットホルダと接続部材の間に設けられた絶縁部材を有することを特徴とする導通検査装置。 A continuity detector having a continuity detection circuit and an alarm circuit, and two pairs of connection cables;
The continuity detection circuit includes a battery as a power source, a power switch, two relays, and an internal bond line having both ends connected to external terminals, and the positive side of the battery is connected to the two relays via the power switch. Connected to one terminal of the coil, the other terminal of each coil is connected to an external terminal through a diode, the negative side of the battery is connected to the middle part of the internal bond line,
The alarm circuit has an alarm lamp and an alarm buzzer connected to a contact that opens when the coil of each relay is excited,
The two pairs of connection cables include an external bond line connected to an external terminal to which the internal bond line is connected, a power cable connected to the external terminal to which the diode is connected, and the external bond line and the power cable. A connection adapter provided at an end of the magnet, wherein the connection adapter includes a magnet holder to which the external bond wire is connected, a connection member to which the power cable is connected, and a gap between the magnet holder and the connection member. A continuity testing apparatus comprising an insulating member provided on the slab. 前記電池の残容量を検出する電圧計測手段を有する請求項１記載の導通検査装置。   The continuity test device according to claim 1, further comprising voltage measuring means for detecting a remaining capacity of the battery. 前記内部ボンド線に流れる電流を検出する電流計測手段を有する請求項１又は２記載の導通検査装置。   The continuity inspection apparatus according to claim 1, further comprising a current measuring unit configured to detect a current flowing through the internal bond line.
JP2006297409A 2006-11-01 2006-11-01 Continuity testing device Expired - Fee Related JP4797933B2 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55141238U (en) * 1979-03-27 1980-10-08
JPS55141916A (en) * 1979-04-20 1980-11-06 Hitachi Ltd Current breakage detector circuit
JPS638675U (en) * 1986-07-04 1988-01-20
JPH0826111A (en) * 1994-07-14 1996-01-30 Railway Technical Res Inst Short-circuiting device for track circuit
JPH117341A (en) * 1997-06-18 1999-01-12 Toshiba Corp Power source device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55141238U (en) * 1979-03-27 1980-10-08
JPS55141916A (en) * 1979-04-20 1980-11-06 Hitachi Ltd Current breakage detector circuit
JPS638675U (en) * 1986-07-04 1988-01-20
JPH0826111A (en) * 1994-07-14 1996-01-30 Railway Technical Res Inst Short-circuiting device for track circuit
JPH117341A (en) * 1997-06-18 1999-01-12 Toshiba Corp Power source device

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