JPH0820522B2 - Underground pipe marking device - Google Patents
Underground pipe marking deviceInfo
- Publication number
- JPH0820522B2 JPH0820522B2 JP1215392A JP21539289A JPH0820522B2 JP H0820522 B2 JPH0820522 B2 JP H0820522B2 JP 1215392 A JP1215392 A JP 1215392A JP 21539289 A JP21539289 A JP 21539289A JP H0820522 B2 JPH0820522 B2 JP H0820522B2
- Authority
- JP
- Japan
- Prior art keywords
- resonator
- pipe joint
- pipe
- heating coil
- joint
- 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.)
- Expired - Fee Related
Links
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)
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。The present invention relates to an underground buried pipe marking device for detecting the buried position of a synthetic resin pipe buried in the ground.
（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) A marker device of this type is composed of a resonator and an antenna coil, the antenna coil receives an excitation signal for exciting the resonator, and the resonator vibrates. A labeling device is known that emits a resonance signal remaining in the resonator from the antenna coil after the stop (for example,
See JP-A-63-243897). This marking device is normally buried in the vicinity of the upper part of the buried pipe when it is buried, and when the buried pipe is detected at a later date, it receives an excitation signal sent from a detector on the ground and emits a resonance signal. However, it is to inform 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ともに、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, in the above-mentioned marking device, it is necessary to bury it separately from the burial pipe so that the burial position does not shift, so the installation work is troublesome, and excavation work is performed after burial or If there is a change, it may be easily displaced from a 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。Therefore, conventionally, as a labeling device for solving the above-mentioned problems, for example, a plastic buried pipe labeling device as disclosed in Japanese Patent Laid-Open No. 63-295986 has been proposed. In this marker device, a heater for heat-welding the joint parts to each other is embedded in one of the joint parts at both ends of the buried pipe having a male and female relationship, and a marker body in which a piezoelectric vibrating body and a loop coil are connected in parallel. It was the one.
（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ぐに腐食してしまい、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。(Problems to be Solved by the Invention) However, in the above-mentioned conventional plastic embedded pipe marking device, the terminals for energizing the heater are exposed to the outside, and after the joint portions are connected to each other, Since it is buried in the ground as it is, the terminal is quickly corroded by moisture in the soil, etc., and if this corrosion extends to the heater, the joint strength of the joint part may decrease, There was a problem that the trust of the plumber could not be obtained.
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。Further, it is not easy to embed the piezoelectric vibrating body and the loop coil in the joint portion, and there is a problem in forming the joint portion.
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 part and the marker cannot be replaced, there is a problem that it cannot be applied, for example, when a marker having a different resonance frequency is to be installed at each buried portion.
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 a buried underground pipe marking device which can prevent corrosion of a terminal for energizing a heater and can easily replace a marker. It is a thing.
（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 Problem) An underground buried pipe marking device according to the present invention includes a resonator and an antenna coil, and the antenna coil receives an excitation signal for exciting the resonator, In a marker device that vibrates and emits a resonance signal remaining in the resonator from the antenna coil after the excitation signal is stopped, a heating coil is provided in a receiving portion that receives an end of the thermoplastic resin tube. It is embedded so as to circulate in the circumferential direction of the receiving part,
A thermoplastic resin pipe joint having an external surface provided with a terminal portion for energizing the heating coil from the outside, and a connector which is a separate body from the pipe joint and is connected to the terminal portion of the pipe joint. And a resonator that is embedded in the ground together with the pipe joint, and energizes the heat generating coil with the end portion of the thermoplastic resin pipe inserted in the receiving portion of the pipe joint, After the heat is generated to heat-weld the receiving portion and the pipe end portion, thereby joining the pipe joint and the pipe, the connector of the resonator is connected to the terminal portion of the pipe joint. The terminal portion is completely covered with the connector, and the resonator and the heating coil are connected to each other, so that the heating coil functions as the antenna coil.
（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) The terminal part for energizing the heating coil is completely covered with the connector of the resonator, so that the terminal part does not come into contact with moisture contained in the soil after being buried, and the terminal part is corroded. Is prevented. Since the resonator is separate from the pipe joint and is attached to the pipe joint at the time of embedding, prepare some resonators with different resonance frequencies and select an appropriate one of them. By connecting to the joint, it is possible to easily change the resonance 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。Hereinafter, an 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 buried 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。発熱コ
イル３は、熱可塑性樹脂管P,Pとの接続時、受内部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P,P
の端部外周面を、その発熱作用によって溶融し、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ピン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。Reference numeral 1 in the figure denotes a pipe joint, which is formed of thermoplastic resin in a substantially cylindrical shape, and has a receiving port for receiving the ends of the thermoplastic resin pipes P, P at both ends. Parts 2, 2 are provided. A heat-generating coil 3 is embedded in these receptacles 2 and 2 so as to circulate in the circumferential direction of the receptacles 2 and 2, and the outer surface is electrically energized from the outside. Terminal portions 4, 4 are provided. When the heating coil 3 is connected to the thermoplastic resin pipes P, P, the thermoplastic resin P, P inserted in the inner peripheral surface of the receiving interior 2, 2 and the receiving portion 2, 2 is connected.
The outer peripheral surface of the end portion is melted by its heat generation effect, and both are welded. The terminal portions 4 and 4 have connection pins 6 and 6 which are connected to the heat generating coil 3 embedded in short tube-shaped bosses 5 and 5 integrally formed on the outer surface of the pipe joint 1. These terminal parts 4 and 4 are
It is arranged so that it is located near the opening ends of 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１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。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。In FIG. 1, reference numeral 7 indicates a resonator, and the resonator 7
Is a separate body from the pipe joint 1 described above and is housed in a case 8 made of a non-conductor having corrosion resistance such as synthetic resin. As the resonator 7, a piezoelectric vibrating body such as a crystal oscillator is preferably used. As described above, when the piezoelectric vibrating body is used for the resonator 7, the amount of energy accumulated in the vibrating body increases, so that the resonance signal with respect to the excitation signal can be made large, which is convenient for highly accurate detection. Good.
The resonator 7 may be a capacitor. Further, a pair of connection cables 10 and 10 having connectors 9 and 9 at the ends are attached to the resonator 7. Connector 9,9
Is formed in a cap shape that can be externally fitted to the bosses 5, 5 of the terminal portions 4, 4 so that the terminal portions 4, 4 of the pipe joint 1 can be completely covered. Jacks 11, 11 connected to the connection pins 6, 6 of the terminal portions 4, 4 are provided.
In this embodiment, the terminals 4, 4 and the connectors 9, 9 are connected by fitting the connectors 9, 9 onto the bosses 5, 5 of the terminals 4, 4, but the connection is not limited to this. Without, for example, a connector
Female threads are formed on the inner peripheral surface of 9,9 and male threads are formed on the outer peripheral surfaces of the bosses 5,5, and the connectors 9,9 are connected to the bosses 5,5.
It may be screwed on.
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 marker device of the present invention composed of the pipe joint 1 and the resonator 7 described above will be described.
まず、管継手１の受口部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,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。First, after inserting the ends of the thermoplastic resin pipes P, P into the sockets 2, 2 of the pipe joint 1, the power supply line of the electric welding device (not shown) is connected to the terminals 4, 4 of the pipe joint 1. (Not shown) is connected and power is supplied to the heating coil 3 for a predetermined time. As a result, the heating coil 3 generates heat, and the inner peripheral surface of the receiving portion 2, 2 and the pipe
The pipe joint 1 and the pipes P, P are connected by welding the outer peripheral surfaces of 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１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 work of connecting the pipes P, P is completed, the power supply line is disconnected from the terminals 4, 4 of the pipe joint 1, and then the connectors 9, 9 of the resonator 7 are connected to the terminals 4, 4. As a result, the terminals 4, 4 are completely covered by the connectors 9, 9, and the resonator 7 and the heating coil 3 of the pipe joint 1 are connected,
The resonator 7 and the heating coil 3 constitute a labeling 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 connecting the resonator 7 to the pipe joint 1 in this way,
The pipe joint 1 and the resonator 7 are both buried in the ground 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１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。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。When the buried position of the buried pipe P is to be detected later, the marker S, that is, the buried position of the pipe joint 1 is detected by scanning the detector S on the ground surface. That is, the detector S is configured such that the transmission mode for transmitting the excitation signal for exciting the resonator 7 of the marking device and the reception mode for receiving the resonance signal emitted from the marking device are switched at regular intervals. When the detector S approaches the pipe joint 1, the heating coil 3 of the pipe joint 1 serves as an antenna coil to receive the excitation signal and the resonator 7 vibrates. And
After the excitation signal is stopped, the resonance signal remaining in the resonator 7 is emitted from the heating coil 3 and is received by the detector S. Therefore, by reading the change in the reception level of the resonance signal, the pipe joint The buried position of 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 described above, in the underground buried pipe labeling device according to the present invention, the terminal portion for energizing the heating coil is completely covered by the connector of the resonator, so that the terminal after the burying The portion does not come into contact with moisture contained in the soil, the corrosion of the terminal portion can be prevented, and the strength of the joint portion is maintained.
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。Since the resonator is separate from the pipe joint and is attached to the pipe joint at the time of embedding, prepare some resonators with different resonance frequencies and select an appropriate one of them. By connecting to the joint, it is possible to easily change the resonance 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。Further, since the heating coil is used as the antenna coil of the marker, only the heating element can be embedded in the joint in the same manner as the conventional method, and it is not necessary to embed the antenna coil and the resonator separately from the heating coil. It is possible to use the welding joint by the heating coil as it is, and solve the problem in manufacturing the joint.
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。 １……管継手、２……受口部 ３……発熱コイル、４……端子部 ６……接続ピン、７……共振体 ９……コネクタ、10……接続ケーブル Ｐ……熱可塑性樹脂管（地中埋設管） Ｓ……探知器FIG. 1 is a partially cutaway front view showing an embodiment of the underground buried pipe marking device according to the present invention, and FIG. 2 is a schematic view showing a buried pipe detecting method. 1 ... Pipe joint, 2 ... Receptacle part, 3 ... Heating coil, 4 ... Terminal part, 6 ... Connection pin, 7 ... Resonator, 9 ... Connector, 10 ... Connection cable, P ... Thermoplastic resin Pipe (underground pipe) S …… Detector
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大井 久一 東京都文京区小石川２丁目５番７号 明星 電気株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisaichi Oi 2-5-7 Koishikawa, Bunkyo-ku, Tokyo Meisei Electric Co., Ltd.
Claims (1)
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ことを特
徴とする地中埋設管標識装置。1. A resonator and an antenna coil,
In a marker device in which the antenna coil receives an excitation signal for exciting the resonator, the resonator vibrates, and after the excitation signal is stopped, the resonance signal remaining in the resonator is emitted from the antenna coil. , A heating coil is embedded in a receiving portion that receives the end of the thermoplastic resin tube so as to circulate in the circumferential direction of the receiving portion, and a terminal portion for energizing the heating coil from the outside is provided on the outer surface. A provided thermoplastic resin pipe joint, and a resonator that is a separate body from the pipe joint and that is provided with a connector that is connected to the terminal portion of the pipe joint, and is embedded in the ground together with the pipe joint. The heating coil is energized to heat the heating coil with the end portion of the thermoplastic resin tube inserted in the receiving portion of the pipe joint to heat-weld the receiving portion and the pipe end. , Which allows the pipe joint to be joined to the pipe. After that, the connector of the resonator is connected to the terminal portion of the pipe joint so that the terminal portion is completely covered with the connector, and the resonator and the heating coil are connected, whereby the heating coil is An underground buried pipe marking device, which is configured to function as the antenna coil.
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 JPH0378689A (en) | 1991-04-03 |
| JPH0820522B2 true 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) |
Families Citing this family (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
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0378689A (en) | 1991-04-03 |
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