JPH0378689A - Marking apparatus for underground buried pipe - Google Patents
Marking apparatus for underground buried pipeInfo
- Publication number
- JPH0378689A JPH0378689A JP1215392A JP21539289A JPH0378689A JP H0378689 A JPH0378689 A JP H0378689A JP 1215392 A JP1215392 A JP 1215392A JP 21539289 A JP21539289 A JP 21539289A JP H0378689 A JPH0378689 A JP H0378689A
- Authority
- JP
- Japan
- Prior art keywords
- resonator
- pipe
- pipe joint
- buried
- heating coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 claims description 30
- 229920005992 thermoplastic resin Polymers 0.000 claims description 12
- 230000005284 excitation Effects 0.000 claims description 10
- 239000003550 marker Substances 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 3
- 238000005304 joining Methods 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- 239000002689 soil Substances 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、地中に埋設される合成樹脂製管の埋設位置を
探知するための地中埋設管標識装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an underground pipe marking device for detecting the buried position of a synthetic resin pipe buried underground.
（従来の技術）
この種の標識装置としては、共振体とアンテナコイルと
から構成され、該共振体を励振する励振信号を該アンテ
ナコイルが受信して共振体が振動し、又該励振信号の停
止後は該共振体に残留している共振信号を前記アンテナ
コイルから放出する標識装置が公知である（例えば、特
開昭６３−２４３８９７号公報参照）。この標識装置は
、通常、埋設管の埋設時に該埋設管の上方近傍位置に埋
設され、後日行われる埋設管探知の際、地上の探知器か
ら送出される励振信号を受信して共振信号を放出し、埋
設管の埋設位置を知らせるものである。(Prior Art) This type of marking device is composed of a resonator and an antenna coil, and the antenna coil receives an excitation signal that excites the resonator, causing the resonator to vibrate. A marker device is known that emits a resonance signal remaining in the resonator from the antenna coil after the resonator has stopped (for example, see Japanese Patent Laid-Open No. 63-243897). This marking device is usually buried near the top of a buried pipe when it is buried, and when detecting a buried pipe at a later date, it receives an excitation signal sent from a detector on the ground and emits a resonance signal. This is to notify the buried position of the buried pipe.
ところが、上記した標識装置にあっては、埋設管とは別
に、しかも埋設位置がずれないように埋設しなければな
らないため、設置作業が面倒であると之もに、埋設後に
掘削工事が行われたり又は地盤変動があったりすると、
所定の位置から容易にずれてしまい、正確な埋設管の探
知ができなくなるといったことがあった。However, with the above-mentioned marker device, it must be buried separately from the buried pipe and in such a way that the buried position does not shift, making installation work cumbersome and requiring excavation work to be carried out after burying. or if there is ground movement,
There have been cases where the pipe easily deviates from the predetermined position, making it impossible to accurately detect the buried pipe.
そこで、従来、上記したような問題点の解消を図った標
識装置として、例えば特開昭６３−２９５９８６号公報
にみられるようなプラスチック埋設管標識装置なるもの
が提案されている。この標識装置は、雌雄関係にある埋
設管両端の継手部の一方に、該継手部相互を熱溶着させ
るためのヒータと、圧電振動体とループコイルを並列に
接続してなる標識体とが埋め込まれたものである。In view of this, conventionally, a plastic buried pipe marking device has been proposed as a marking device intended to solve the above-mentioned problems, as disclosed in, for example, Japanese Patent Application Laid-Open No. 63-295986. This marking device has a heater for thermally welding the joints to each other, and a marking body made up of a piezoelectric vibrator and a loop coil connected in parallel, embedded in one of the joints at both ends of the male-female buried pipe. It is something that was given.
（発明が解決しようとする課題）
しかしながら、上記従来のプラスチック埋設管標識装置
にあっては、ヒータに通電するための端子が外部に露出
しており、継手部相互の接続が行われたのちはそのまま
の状態で地中に埋められてしまうため、該端子が土中の
水分等によってすくに腐食してしまい、この腐食がヒー
タにまで及ぶと、継手部の接合強度が低下するおそれが
あり、配管施工者の信頼が得られないという問題があっ
た。(Problem to be Solved by the Invention) However, in the conventional plastic buried pipe marking device described above, the terminal for energizing the heater is exposed to the outside, and after the joint parts are connected to each other, Because the terminals are buried in the ground as they are, they are easily corroded by moisture in the soil, and if this corrosion extends to the heater, there is a risk that the joint strength of the joint will decrease. There was a problem in that it was difficult to gain the trust of the piping installers.
また、圧電振動体とループコイルを継手部に埋め込むの
は容易でなく、継手部の成形加工に問題があった。Furthermore, it is not easy to embed the piezoelectric vibrator and the loop coil in the joint, and there are problems in the molding process of the joint.
さらに、標識体が継手部に埋め込まれており、標識体の
交換ができないため、例えば、埋設箇所ごとに共振周波
数の異なる標識体を設置しようとする場合に対応できな
いといった問題もあった。Furthermore, since the marker is embedded in the joint and cannot be replaced, there is also the problem that, for example, it is not possible to install markers with different resonant frequencies at different buried locations.
本発明は、上記従来の問題点に鑑みなされたものであっ
て、ヒータに通電するための端子の防食を図るとともに
、標識体の交換が簡単に行える地中埋設管標識装置を提
供しようとするものである。The present invention has been made in view of the above-mentioned conventional problems, and aims to provide an underground pipe marking device that prevents corrosion of the terminal for energizing the heater and allows easy replacement of the marking body. It is something.
（課題を解決するための手段）
本発明に係る地中埋設管標識装置は、共振体とアンテナ
コイルとから構成され、該共振体を励振する励振信号を
該アンテナコイルが受信して共振体が振動し、又該励振
信号の停止後は該共振体に残留している共振信号を前記
アンテナコイルから放出する標識装置において、熱可塑
性樹脂管の端部を受ける受口部に、発熱コイルが該受口
部の周方向に周回するように埋め込まれるとともに、外
面に、該発熱コイルに外部から通電するための端子部が
設けられた熱可塑性樹脂製の管継手と、この管継手とは
別体であって、該管継手の端子部に接続されるコネクタ
を備え、該管継手とともに地中に埋設される共振体とか
ら構成され、熱可塑性樹脂管の端部を前記管継手の受口
部に挿入した状態で前記発熱コイルに通電し該発熱コイ
ルを発熱させて該受口部と管端部とを熱溶着させ、これ
によって該管継手と管との接合が行われた後、該管継手
の端子部に前記共振体のコネクタが接続されて該端子部
が該コネクタにより完全に被覆されるとともに、該共振
体と前記発熱コイルとが結線され、これによって該発熱
コイルが前記アンテナコイルとして機能するようになさ
れたものである。(Means for Solving the Problems) The underground pipe marking device according to the present invention is composed of a resonator and an antenna coil, and the antenna coil receives an excitation signal that excites the resonator, and the resonator is activated. In a marker device that vibrates and emits a resonance signal remaining in the resonator after the excitation signal is stopped from the antenna coil, a heating coil is attached to a socket portion that receives an end of a thermoplastic resin tube. A thermoplastic resin pipe joint that is embedded in a circumferential direction of a socket part and has a terminal part on its outer surface for supplying electricity to the heating coil from the outside, and a separate body from this pipe joint. The resonator includes a connector connected to a terminal portion of the pipe joint, and a resonator buried underground together with the pipe joint, and the end portion of the thermoplastic resin pipe is connected to the socket portion of the pipe joint. The heating coil is energized while the heating coil is inserted into the pipe, causing the heating coil to generate heat to thermally weld the socket and the pipe end, thereby joining the pipe joint to the pipe. The connector of the resonator is connected to the terminal portion of the joint, and the terminal portion is completely covered by the connector, and the resonator and the heating coil are connected, whereby the heating coil functions as the antenna coil. It was made to work.
（作用）
発熱コイルに通電するための端子部が、共振体のコネク
タにより完全に被覆されることにより、埋設後、端子部
が土中に含まれる水分等に触れることがなくなり、端子
部の腐食が防止される。また、共振体は管継手と別体で
あり、埋設時に管継手に取り付けられるものであるから
、共振体に共振周波数の異なるものをいくつか用意して
おき、そのうちの適当なものを選んで管継手に接続する
ことで、埋設箇所ごとに共振周波数を変えるといったこ
とが簡単に行える。(Function) Since the terminal part for energizing the heating coil is completely covered by the connector of the resonator, the terminal part will not come into contact with moisture contained in the soil after burial, and corrosion of the terminal part will be prevented. is prevented. In addition, since the resonator is separate from the pipe joint and is attached to the pipe joint when buried, prepare several resonators with different resonant frequencies and select the appropriate one to install in the pipe. By connecting it to a joint, you can easily change the resonant frequency for each buried location.
（実施例） 以下、本発明の一実施例を、図面を参照して説明する。(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第１図は本発明に係る地中埋設管標識装置を示す一部切
欠正面図である。FIG. 1 is a partially cutaway front view showing an underground pipe marking device according to the present invention.
図中の符号１は管継手を示し、この管継手１は、熱可塑
性樹脂により略円筒状に成形されたものであって、両端
部に熱可塑性樹脂管Ｐ、 Ｐの端部を受ける受口部２
，２が設けられている。そしてこれら受口部２，２には
、発熱コイル３が該受口部２．２の周方向に周回するよ
うに埋め込まれているとともに、外面には、該発熱コイ
ル３に外部から通電するための端子部４．４が設けられ
ている。Reference numeral 1 in the figure indicates a pipe joint, and the pipe joint 1 is formed of thermoplastic resin into a substantially cylindrical shape, and has thermoplastic resin pipes P at both ends, and sockets for receiving the ends of P. Part 2
, 2 are provided. A heating coil 3 is embedded in these sockets 2, 2 so as to circulate in the circumferential direction of the socket 2.2, and a heating coil 3 is provided on the outer surface for supplying electricity to the heating coil 3 from the outside. A terminal portion 4.4 is provided.
発熱コイル３は、熱可塑性樹脂管Ｐ、 Ｐとの接続時
、受口部２，２の内周面、及び該受口部２，２に挿入さ
れた熱可塑性樹脂管Ｐ、Ｐの端部外周面を、その発熱作
用によって熔融し、両者を溶着させるためのものである
。前記端子部４．４は、管継手１の外面に一体的に突設
された短筒状のボス５．５内に、前記発熱コイル３と接
続されている接続ビン６．６が埋め込まれたもので、こ
れら端子部４，４は、前記受口部２．２の開口端寄りに
位置するように配されている。When the heating coil 3 is connected to the thermoplastic resin pipes P, P, the inner peripheral surfaces of the sockets 2, 2 and the ends of the thermoplastic resin pipes P, P inserted into the sockets 2, 2, This is for melting the outer circumferential surface due to its heat generation action and welding the two together. In the terminal portion 4.4, a connecting pin 6.6 connected to the heating coil 3 is embedded in a short cylindrical boss 5.5 that is integrally provided on the outer surface of the pipe joint 1. These terminal parts 4, 4 are arranged so as to be located near the open end of the socket part 2.2.
第１図において符号７は共振体を示し、この共振体７は
、上記した管継手工とは別体であって、例えば合成樹脂
などの耐食性を備えた不導体からなるケース８内に収納
されている。共振体７としては、水晶振動子等の圧電振
動体が好適に用いられる。このように、共振体７に圧電
振動体を用いた場合、これに蓄積されるエネルギー量が
多くなるため、励振信号に対する共振信号を大きくとる
ことができ、高精度の探知を行ううえで都合がよい。な
お、共振体７はコンデンサであってもよい。In FIG. 1, reference numeral 7 indicates a resonator, and this resonator 7 is separate from the above-mentioned pipe fitting and is housed in a case 8 made of a nonconductor with corrosion resistance such as synthetic resin. ing. As the resonator 7, a piezoelectric vibrator such as a crystal resonator is suitably used. In this way, when a piezoelectric vibrator is used as the resonator 7, the amount of energy stored in it increases, so the resonance signal relative to the excitation signal can be increased, which is convenient for high-precision detection. good. Note that the resonator 7 may be a capacitor.
また、この共振体７には、先端にコネクタ９，９を有す
る一対の接続ケーブル１０．１０が取り付けられている
。コネクタ９，９は、前記管継手１の端子部４，４を完
全に被覆することができるよう、該端子部４，４のボス
５，５に外嵌可能なキャップ状に形成されており、その
内部には端子部４．４の接続ピン６．６と接続されるジ
ャック１１゜１１が設けられている。なお、この実施例
では、端子部４．４とコネクタ９．９との接続をコネク
タ９．９を端子部４，４のボス５，５に外嵌させること
により行っているが、これに限らず、例えばコネクタ９
，９の内周面に雌ネジを、またボス５．５の外周面にこ
れと螺合する雄ネジを形成しておき、コネクタ９，９を
ボス５，５に螺着させるようにしてもよい。Further, a pair of connection cables 10, 10 having connectors 9, 9 at their tips are attached to this resonator 7. The connectors 9, 9 are formed in a cap shape that can be fitted onto the bosses 5, 5 of the terminal parts 4, 4 so as to completely cover the terminal parts 4, 4 of the pipe joint 1, Inside thereof, a jack 11.degree. 11 is provided which is connected to the connecting pin 6.6 of the terminal section 4.4. In this embodiment, the terminal portion 4.4 and the connector 9.9 are connected by fitting the connector 9.9 onto the bosses 5, 5 of the terminal portions 4, 4, but this is not limited to this. For example, connector 9
, 9 are formed with female threads on the inner circumferential surface, and male threads are formed on the outer circumferential surface of the bosses 5.5 to be screwed together, and the connectors 9, 9 are screwed onto the bosses 5, 5. good.
次に、上記した管継手１と共振体７とから構成される本
発明の標識装置の使用方法について説明する。Next, a method of using the marking device of the present invention comprising the above-mentioned pipe joint 1 and resonator 7 will be explained.
まず、管継手１の受ロ部２，２内に熱可塑性樹脂管Ｐ、
Ｐの端部を挿入したのち、管継手１の端子部４，４
に電気溶着装置（図示省略）の電力供給ライン（図示省
略）を接続し、所定時間発熱コイル３に電力を供給する
。これによって、発熱コイル３が発熱し、受口部２．２
の内周面と管Ｐ。First, a thermoplastic resin pipe P,
After inserting the end of P, connect the terminals 4, 4 of the pipe fitting 1.
A power supply line (not shown) of an electric welding device (not shown) is connected to the heating coil 3 for a predetermined period of time. As a result, the heating coil 3 generates heat, and the socket part 2.2
The inner peripheral surface of the pipe P.
Ｐの外周面とが溶着して管継手１と管Ｐ、Ｐとが接続さ
れる。The outer peripheral surface of P is welded to connect the pipe joint 1 and the pipes P, P.
上記管Ｐ、Ｐの接続作業が完了したならば、管継手１の
端子部４，４から電力供給ラインを外し、次に共振体７
のコネクタ９，９を端子部４，４に接続する。これによ
って、端子部４．４はコネクタ９，９によって完全に被
覆されるとともに、共振体７と管継手ｌの発熱コイル３
とが結線され、これら共振体７と発熱コイル３とで標識
装置が構成される。When the connection work of the pipes P and P is completed, remove the power supply line from the terminals 4 and 4 of the pipe joint 1, and then
Connect the connectors 9, 9 to the terminal parts 4, 4. As a result, the terminal portion 4.4 is completely covered by the connectors 9, 9, and the resonator 7 and the heating coil 3 of the pipe fitting l.
These resonators 7 and heating coils 3 constitute a marker device.
このようにして管継手１に共振体７を接続したのち、管
継手１及び共振体７を共に地中に埋設して作業を完了す
る。After the resonator 7 is connected to the pipe joint 1 in this manner, the pipe joint 1 and the resonator 7 are both buried underground to complete the work.
そして、後日、埋設管Ｐの埋設位置の探知を行う場合は
、探知器Ｓを地表面で走査することによって上記標識装
置、つまり管継手１の埋設位置を検知する。すなわち、
探知器Ｓは、標識装置の共振体７を励振する励振信号を
送出する送信モードと、標識装置から放出される共振信
号を受信する受信モードとが一定時間毎に切り替わるよ
うになされており、この探知器Ｓが管継手ｌに接近する
と、管継手１の発熱コイル３がアンテナコイルとなって
励振信号を受信し、共振体７が振動する。When the buried position of the buried pipe P is to be detected at a later date, the buried position of the marker device, that is, the pipe joint 1, is detected by scanning the ground surface with the detector S. That is,
The detector S is configured to switch at regular intervals between a transmission mode in which it sends out an excitation signal that excites the resonator 7 of the marking device, and a reception mode in which it receives a resonance signal emitted from the marking device. When the detector S approaches the pipe joint 1, the heating coil 3 of the pipe joint 1 serves as an antenna coil and receives an excitation signal, causing the resonator 7 to vibrate.
そして、励振信号の停止後は、共振体７に残留している
共振信号が発熱コイル３から放出され、これが該探知器
Ｓによって受信されるので、該共振信号の受信レベルの
変化を読み取ることにより管継手１の埋設位置が探知さ
れるのである。After the excitation signal stops, the resonance signal remaining in the resonator 7 is emitted from the heating coil 3, and this is received by the detector S. By reading the change in the reception level of the resonance signal, The buried position of the pipe joint 1 is detected.
（発明の効果）
以上説明したように、本発明に係る地中埋設管標識装置
は、発熱コイルに通電するための端子部が、共振体のコ
ネクタにより完全に被覆されるので、埋設後、端子部が
土中に含まれる水分等に触れることがなくなり、端子部
の腐食を防止することができ、接合部の強度が保持され
る。(Effects of the Invention) As explained above, in the underground pipe marking device according to the present invention, since the terminal portion for energizing the heating coil is completely covered with the connector of the resonator, This prevents the terminal from coming into contact with moisture contained in the soil, preventing corrosion of the terminal, and maintaining the strength of the joint.
また、共振体は管継手と別体であり、埋設時に管継手に
取り付けられるものであるから、共振体に共振周波数の
異なるものをいくつか用意しておき、そのうちの適当な
ものを選んで管継手に接続することで、埋設箇所ごとに
共振周波数を変えるといったことが簡単に行える。In addition, since the resonator is separate from the pipe joint and is attached to the pipe joint when buried, prepare several resonators with different resonant frequencies and select the appropriate one to install in the pipe. By connecting it to a joint, you can easily change the resonant frequency for each buried location.
また、発熱コイルを標識体のアンテナコイルとして使用
するので、継手部には発熱体のみを従来と同じ方法で埋
設することができ、発熱コイルと別にアンテナコイルと
共振体を埋め込む必要がなく、従来の発熱コイルによる
溶着継手をそのまま利用でき、継手製造上の問題を解消
することができる。In addition, since the heating coil is used as the antenna coil of the marker, only the heating element can be buried in the joint in the same way as before, eliminating the need to embed the antenna coil and resonator separately from the heating coil, which was previously the case. The welded joint using the heating coil can be used as is, and problems in manufacturing the joint can be solved.
第１図は本発明に係る地中埋設管標識装置の一実施例を
示す一部切欠正面図、第２図は埋設管探知方法を示す概
略図である。
・・・管継手
・・・発熱コイル
・・・接続ピン
・・・コネクタ
・・・熱可塑性樹脂管
・・・探知器
２・・・受口部
４・・・端子部
７・・・共振体
１０・・・接続ケーブル
（地中埋設管）FIG. 1 is a partially cutaway front view showing an embodiment of an underground pipe marking device according to the present invention, and FIG. 2 is a schematic diagram showing a buried pipe detection method. ... Pipe joint ... Heating coil ... Connection pin ... Connector ... Thermoplastic resin pipe ... Detector 2 ... Socket section 4 ... Terminal section 7 ... Resonator 10... Connection cable (underground pipe)
Claims (1)
を励振する励振信号を該アンテナコイルが受信して共振
体が振動し、又該励振信号の停止後は該共振体に残留し
ている共振信号を前記アンテナコイルから放出する標識
装置において、 熱可塑性樹脂管の端部を受ける受口部に、 発熱コイルが該受口部の周方向に周回するように埋め込
まれるとともに、外面に、該発熱コイルに外部から通電
するための端子部が設けられた熱可塑性樹脂製の管継手
と、 この管継手とは別体であって、該管継手の端子部に接続
されるコネクタを備え、該管継手とともに地中に埋設さ
れる共振体とから構成され、 熱可塑性樹脂管の端部を前記管継手の受口部に挿入した
状態で前記発熱コイルに通電し該発熱コイルを発熱させ
て該受口部と管端部とを熱溶着させ、これによって該管
継手と管との接合が行われた後、該管継手の端子部に前
記共振体のコネクタが接続されて該端子部が該コネクタ
により完全に被覆されるとともに、該共振体と前記発熱
コイルとが結線され、これによって該発熱コイルが前記
アンテナコイルとして機能するようになされたことを特
徴とする地中埋設管標識装置。[Claims] 1) Consisting of a resonator and an antenna coil, the antenna coil receives an excitation signal that excites the resonator, causing the resonator to vibrate, and after the excitation signal stops, the resonance continues. In the marker device that emits a resonance signal remaining in the body from the antenna coil, a heating coil is embedded in a socket part that receives an end of a thermoplastic resin pipe so as to circulate in the circumferential direction of the socket part. In addition, a thermoplastic resin pipe joint is provided on the outer surface with a terminal portion for supplying electricity to the heating coil from the outside, and the pipe joint is a separate body and is connected to the terminal portion of the pipe joint. and a resonator that is buried underground together with the pipe joint, and when the end of the thermoplastic resin pipe is inserted into the socket of the pipe joint, the heating coil is energized to generate the heat. The coil is made to generate heat to thermally weld the socket part and the pipe end, thereby joining the pipe joint to the pipe, and then the connector of the resonator is connected to the terminal part of the pipe joint. The terminal portion is completely covered by the connector, and the resonator and the heating coil are connected, so that the heating coil functions as the antenna coil. Buried pipe marking device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1215392A JPH0820522B2 (en) | 1989-08-21 | 1989-08-21 | Underground pipe marking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1215392A JPH0820522B2 (en) | 1989-08-21 | 1989-08-21 | Underground pipe marking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0378689A true JPH0378689A (en) | 1991-04-03 |
| JPH0820522B2 JPH0820522B2 (en) | 1996-03-04 |
Family
ID=16671556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1215392A Expired - Fee Related JPH0820522B2 (en) | 1989-08-21 | 1989-08-21 | Underground pipe marking device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0820522B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100607574B1 (en) * | 2006-01-25 | 2006-08-03 | 이복현 | Plastic pipe with wire for pipeline detection |
-
1989
- 1989-08-21 JP JP1215392A patent/JPH0820522B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100607574B1 (en) * | 2006-01-25 | 2006-08-03 | 이복현 | Plastic pipe with wire for pipeline detection |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0820522B2 (en) | 1996-03-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0536669Y2 (en) | ||
| JPH0378689A (en) | Marking apparatus for underground buried pipe | |
| EP0927848A3 (en) | Reinforced, insulating hose | |
| JPH0785110B2 (en) | Plastic tube marking device | |
| JP2507186Y2 (en) | Connection structure between resin pipe and manhole | |
| JP2823422B2 (en) | Connection structure of plastic buried pipe | |
| GB2119744A (en) | Indicating devices for use with heat-sealable fittings for making connections to heat-sealable tubing or pipes | |
| JPH0619912Y2 (en) | Welding joint | |
| JPH10246382A (en) | Electrofusion joint for synthetic resin pipe | |
| JPH07332542A (en) | Electric welded joint and manufacture thereof | |
| JP3053460B2 (en) | Pipe fitting detection method | |
| JP3053424B2 (en) | Electric fusion joint and pipe connection method | |
| JPH04203585A (en) | Electrically fused coupling | |
| JPH0979471A (en) | Polyethylene resin socket coupling and detecting method for socket coupling | |
| JPH04321893A (en) | Pipe joint | |
| JPH07134182A (en) | Underground buried pipe labeling device | |
| JPS63111393A (en) | Method of connecting electric fusion type plastic pipe | |
| JPH10205658A (en) | Underground installing synthetic resin pipe | |
| JPH0520957Y2 (en) | ||
| JP3261251B2 (en) | Buried pipe detector | |
| JPH0552288A (en) | Electrical fusion coupling | |
| JPH1061868A (en) | Burying piping made of plastic | |
| JPH07311276A (en) | Buried pipe probe device | |
| JPH08145268A (en) | Length adjusting coupling for electric fusion | |
| JPH0789152B2 (en) | Plastic buried pipe marking device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |