JPH0785110B2 - Plastic tube marking device - Google Patents
Plastic tube marking deviceInfo
- Publication number
- JPH0785110B2 JPH0785110B2 JP13092487A JP13092487A JPH0785110B2 JP H0785110 B2 JPH0785110 B2 JP H0785110B2 JP 13092487 A JP13092487 A JP 13092487A JP 13092487 A JP13092487 A JP 13092487A JP H0785110 B2 JPH0785110 B2 JP H0785110B2
- Authority
- JP
- Japan
- Prior art keywords
- joint portion
- embedded
- pipe
- heater
- buried
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
- B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
- B29C66/91216—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods enabling contactless temperature measurements, e.g. using a pyrometer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
- B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Examining Or Testing Airtightness (AREA)
- Geophysics And Detection Of Objects (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、地中に埋設される例えばガス管、水道管等の
プラスチック埋設管の継手部分の施工監視手段と埋設後
の当該プラスチック埋設管の埋設位置探知手段とを兼用
する標識装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a construction monitoring means for a joint portion of a plastic buried pipe such as a gas pipe or a water pipe buried in the ground, and the plastic buried pipe after being buried. The present invention relates to a marking device that also serves as the buried position detecting means.
管の両端に雌雄関係の継手部が形成されていて一方の継
手部にヒーターが埋め込まれており、埋設施工時に一方
の管の雌継手部に他方の管の雄継手部を嵌め込んだ後、
上記ヒーターに通電して継手部を加熱し、双方の継手部
を熱溶着させることにより管を連結するようにしたプラ
スチック埋設管（以下、埋設管という。）が公知であ
る。Male and female joint parts are formed at both ends of the pipe and the heater is embedded in one joint part, and after fitting the male joint part of the other pipe into the female joint part of one pipe during burying construction,
A plastic buried pipe (hereinafter referred to as a buried pipe) is known in which the above-mentioned heater is energized to heat the joint portion, and both joint portions are heat-welded to connect the pipes.
かかる埋設管を連結する際に於いては、継手部の温度上
昇を監視して当該継手部の熱溶着の完了を検知している
が、当該継手部の温度監視方法として従来はヒーターの
温度変化による抵抗値の変化を温度に換算する方法が採
られている。When connecting such a buried pipe, the temperature rise of the joint is monitored to detect the completion of thermal welding of the joint. A method of converting a change in resistance value due to the temperature into temperature is adopted.
また、埋設管は地中に埋設されたのち、しばしばその埋
設位置を探知する必要が生ずるが、このため従来は埋設
管の埋設時に当該埋設管の近傍に標識体を埋めておき、
この標識体を検知することによって当該埋設管の埋設位
置を探知するような方法が採られている。In addition, after the buried pipe is buried in the ground, it is often necessary to detect the buried position.For this reason, conventionally, when the buried pipe was buried, a marker was buried near the buried pipe,
A method is adopted in which the buried position of the buried pipe is detected by detecting the marker.
以上に述べた従来の埋設管継手部の熱溶着監視方法によ
ると、ヒーターの温度係数のばらつきや熱溶着の違い等
により温度監視が正確性に欠き、かつ監視される個所は
ヒーターそのものであって継手部の溶着面の温度を監視
するのではないため熱溶着が不完全となることがしばし
ば生じている。According to the conventional thermal welding monitoring method for the buried pipe joint section described above, the temperature monitoring lacks accuracy due to variations in the temperature coefficient of the heater and differences in thermal welding, and the location monitored is the heater itself. Thermal welding is often incomplete because the temperature of the welded surface of the joint is not monitored.
また上記従来の埋設管位置探知方法では埋設管と別個に
標識体を埋設する必要があり、かつ後日の他の工事によ
り地面が掘り起された場合等に於いて上記標識体の位置
がずれたりすると正確な埋設管の探知が不可能となる。Further, in the conventional buried pipe position detecting method, it is necessary to bury the sign body separately from the buried pipe, and the position of the sign body may be displaced when the ground is dug up by another construction at a later date. Then, it becomes impossible to detect the buried pipe accurately.
本発明は以上のような問題点を解決し、かつ施工時の埋
設管の継手部熱溶着監視と埋設後の埋設位置探知の双方
に兼用できる標識装置を提供すべく提案するものであ
る。The present invention proposes to provide a marker device that solves the above problems and can be used both for monitoring the heat welding of the joint portion of the buried pipe during construction and for detecting the buried position after the buried work.
以上の問題点を解決すべく、本発明は、雌雄関係にある
埋設管両端の継手部の一方に、共振周波数が温度変化に
よって一定の関係で変化する特性の圧電振動体とループ
コイルとを並列接続してなる標識体を埋め込むようにし
たものである。In order to solve the above problems, the present invention provides a parallel connection of a piezoelectric vibrating body and a loop coil, each of which has a characteristic that a resonance frequency changes in a constant relationship due to a temperature change, in one of joints at both ends of a buried pipe having a male and female relationship. It is designed to embed a connected sign body.
標識体に向けて周波数掃引信号を送出すると、ループコ
イルを介して当該信号が圧電振動体に印加され、当該信
号の周波数が圧電振動体の共振周波数と実質的に（実質
的という語句は、作用に影響を及ぼさない範囲の違いは
同一とみなすことを意味するものとする。）一致したと
き圧電振動体は共振し、共振周波数の信号を放出する。
圧電振動体の放出する上記信号は、標識体が埋め込まれ
た埋設管継手部の温度と一定の関係にある周波数の信号
であるので、この信号をループコイルを介して受信する
ことによって上記継手部の温度が検知できる。すなわ
ち、当該継手部の溶着程度が監視できることとなる。When the frequency sweep signal is sent toward the marker, the signal is applied to the piezoelectric vibrating body through the loop coil, and the frequency of the signal is substantially equal to the resonance frequency of the piezoelectric vibrating body (the word “substantial” means The difference in the range that does not affect is assumed to be the same.) When they match, the piezoelectric vibrating body resonates and emits a signal at the resonance frequency.
Since the signal emitted by the piezoelectric vibrating body is a signal of a frequency having a constant relationship with the temperature of the embedded pipe joint portion in which the marker is embedded, the joint portion is received by receiving this signal through the loop coil. The temperature of can be detected. That is, the degree of welding of the joint can be monitored.
また、埋設管を地中に埋設すると標識体も同時に埋設さ
れるので、周波数掃引信号を放射し、かつ標識体からの
信号（圧電振動体の共振信号）を受信するように構成さ
れた探知器を地面上で走査すると、当該探知器が埋設管
の継手部に近づいたとき、圧電振動体が励振されて共振
信号が受信され、これによって埋設管の埋設位置が探知
できる。Further, when the buried pipe is buried in the ground, the marker is also buried at the same time. Therefore, the detector configured to emit the frequency sweep signal and receive the signal from the marker (resonance signal of the piezoelectric vibrating body). Scanning on the ground, when the detector approaches the joint of the buried pipe, the piezoelectric vibrating body is excited and a resonance signal is received, whereby the buried position of the buried pipe can be detected.
図面はいずれも本発明の実施例を説明するもので、第１
図（Ａ），（Ｂ）は埋設管継手部の断面図、第２図、第
３図及び第４図は回路図、第５図は埋設管探知方法を示
す図である。The drawings all illustrate embodiments of the present invention.
(A) and (B) are sectional views of the buried pipe joint portion, FIGS. 2, 3, and 4 are circuit diagrams, and FIG. 5 is a view showing a buried pipe detection method.
第５図に示すように、埋設管１は、その両端が雌継手部
101及び雄継手部102となっており、第１図（Ａ）に示す
ように雌継手部101には、当該雌継手部101の周方向に巻
回したループコイル２、圧電振動体３及びコンデンサ４
でなる標識体５が埋め込まれている。また、第１図
（Ｂ）に示すように雄継手部102には、当該雄継手部102
の周方向にコイル状に巻回したヒーター６が埋め込ま
れ、当該ヒーター６に外部から通電できるように端子７
が外部に露出して設けられている。As shown in FIG. 5, the buried pipe 1 has female joint portions at both ends thereof.
101 and a male joint portion 102. As shown in FIG. 1A, the female joint portion 101 has a loop coil 2, a piezoelectric vibrating body 3 and a capacitor which are wound in the circumferential direction of the female joint portion 101. Four
A marker body 5 consisting of is embedded. Further, as shown in FIG. 1 (B), the male joint portion 102 has the male joint portion 102.
A heater 6 wound in a coil shape in the circumferential direction of is embedded in the terminal 7 so that the heater 6 can be energized from the outside.
Is exposed to the outside.
上記圧電振動体３としては、温度対共振周波数特性の良
好なこと及び蓄積エネルギーの多いこと（電気的Ｑが高
いこと）等により、実施例では水晶振動子を使用してい
る（以下、水晶振動子を例とする。）。As the piezoelectric vibrating body 3, a crystal oscillator is used in the embodiment because of its good temperature-resonance frequency characteristic and large amount of stored energy (high electric Q). Take the child as an example.).
第１図（Ａ），（Ｂ）に示すものの回路構成を第２図に
示す。すなわち、雌継手部101に埋め込まれた標識体５
は、ループコイル２、水晶振動子３及びコンデンサ５が
並列接続されて構成されている。尚、コンデンサ４は水
晶振動子３の共振周波数微調用であって必ずしも必要と
しない。FIG. 2 shows the circuit configuration of what is shown in FIGS. 1 (A) and 1 (B). That is, the marker 5 embedded in the female joint 101
Is composed of a loop coil 2, a crystal oscillator 3 and a capacitor 5 connected in parallel. The capacitor 4 is for fine tuning the resonance frequency of the crystal unit 3 and is not always necessary.
埋設管１の埋設施工時に於いて、埋識管相互を結合する
際には第１図に於いて、一方の埋設管１の雌継手部101
の中央孔103に他方の埋設管１′の雄継手部102を嵌め込
み（嵌め込んだ状態は第５図に示されている。）、第２
図に示すように、端子７に電源８を接続してヒーター６
に通電する。これによって雄継手部102及びこれと接し
ている雌継手部101は加熱され、やがて雄継手部102の外
周壁104と雄継手部101の内周壁105とが溶融し、ヒータ
ー６への通電を断つと上記溶融部分が固化して埋設管1,
1′が継手部分で相互に溶着結合される。When burying the buried pipe 1 and connecting the buried pipes to each other, as shown in FIG. 1, a female joint portion 101 of one buried pipe 1 is shown.
The male joint portion 102 of the other embedded pipe 1'is fitted into the central hole 103 of the other (the fitted state is shown in FIG. 5), and the second
As shown in the figure, the power source 8 is connected to the terminal 7 and the heater 6 is connected.
Energize. As a result, the male joint portion 102 and the female joint portion 101 in contact with the male joint portion 102 are heated, and eventually the outer peripheral wall 104 of the male joint portion 102 and the inner peripheral wall 105 of the male joint portion 101 are melted, and the power supply to the heater 6 is cut off. And the above-mentioned melted portion solidifies and the buried pipe 1,
1'is welded to each other at the joint portion.
上記作業時に於いて、継手部101,102の近傍に次の温度
監視装置（図示せず）のアンテナを設置しておく。すな
わち、当該温度監視装置は周波数掃引信号を間欠的に送
出し、当該信号が送出されない間は標識体５からの信号
が受信できるように構成されており、上記アンテナは送
受信兼用になっている。At the time of the above work, the antenna of the next temperature monitoring device (not shown) is installed near the joints 101 and 102. That is, the temperature monitoring device is configured to intermittently send out the frequency sweep signal, and while the signal is not sent out, the signal from the marker 5 can be received, and the antenna serves both transmission and reception.
水晶振動子３の共振周波数は、そのときの雌継手部101
の温度に対応した周波数に刻々変化しており、ループコ
イル２を介して上記温度監視装置から印加された信号の
周波数がそのときの水晶振動子３の共振周波数に実質的
に一致すると、当該信号によって水晶振動子３が励振さ
れて励振エネルギーが蓄積される。この蓄積された励振
エネルギーは上記信号の印加が断たれた瞬間に水晶振動
子３の残留振動によって消費され、水晶振動子３から
は、そのときの共振周波数で振動する減衰信号が放出さ
れる。この減衰信号はループコイル２から放射され、上
記温度監視装置で受信され、受信信号の周波数から重な
り合った継手部101,102の温度が演算される。このよう
にして埋設管1,1′の結合作業時には継手部101,102の温
度が常時監視され、ヒーター６への通電時間が最適に管
理される。The resonance frequency of the crystal unit 3 is the female joint portion 101 at that time.
When the frequency of the signal applied from the temperature monitoring device via the loop coil 2 substantially coincides with the resonance frequency of the crystal resonator 3 at that time, the signal is changed. Then, the crystal oscillator 3 is excited and the excitation energy is accumulated. The accumulated excitation energy is consumed by the residual vibration of the crystal resonator 3 at the moment when the application of the signal is cut off, and the crystal resonator 3 emits an attenuation signal that vibrates at the resonance frequency at that time. This attenuation signal is radiated from the loop coil 2, received by the temperature monitoring device, and the temperature of the overlapping joint portions 101, 102 is calculated from the frequency of the received signal. In this way, the temperature of the joint portions 101, 102 is constantly monitored during the work of connecting the buried pipes 1, 1 ', and the time for energizing the heater 6 is optimally controlled.
次に、埋設管１の埋設位置を探知する際には、第５図に
示すように、上記温度監視装置と同様の構成の探知器９
（温度監視装置は受信信号の周波数から温度を演算する
処理部を必要とするが、探知器９には、この処理部を必
要としない。）の少くともアンテナ（サーチコイル）部
分を地面10上に走査する。当該探知器９が埋設管１の継
手部（雌継手部101）に近づくと前記温度監視時と同様
にして標識体５からの減衰信号が受信されるので、これ
によって埋設管１の埋設位置が探知できることとなる。
尚、以上の探知動作では標識体５のみを必要とし、ヒー
ター６及び電源８は無関係となる。Next, when detecting the buried position of the buried pipe 1, as shown in FIG. 5, a detector 9 having the same configuration as the temperature monitoring device is used.
(The temperature monitoring device needs a processing unit for calculating the temperature from the frequency of the received signal, but the detector 9 does not need this processing unit.) At least the antenna (search coil) portion is placed on the ground 10. To scan. When the detector 9 approaches the joint portion (female joint portion 101) of the buried pipe 1, the attenuation signal from the marker 5 is received in the same manner as during the temperature monitoring, so that the buried position of the buried pipe 1 is determined. You will be able to detect.
In the above detection operation, only the marker 5 is required, and the heater 6 and the power source 8 are irrelevant.
また、探知器９に受信信号の周波数を演算して温度を検
出する機能を備えれば、埋設管１の埋設位置の探知と同
時にそのときの継手部分の温度も検出でき、埋設管１の
異常も同時に検知できる。すなわち、例えばガス管に於
いて継手部からガス洩れが生じていたり、又は水道管に
於いて継手部から洩水したりする事故が生じていると、
事故部分の継手部は他の継手部より低い温度になってい
るからである。このように埋設管１の埋設位置と障害を
同時に検知する場合の探知器９は前記温度監視装置と同
一構成でよい（温度監視装置と探知器とが兼用でき
る。）。Further, if the detector 9 has a function of calculating the frequency of the received signal to detect the temperature, it is possible to detect the buried position of the buried pipe 1 and simultaneously detect the temperature of the joint portion at that time. Can be detected at the same time. That is, for example, if there is an accident such as gas leakage from the joint portion in the gas pipe or water leakage from the joint portion in the water pipe,
This is because the temperature of the joint part of the accident part is lower than that of other joint parts. In this way, the detector 9 for simultaneously detecting the buried position of the buried pipe 1 and the obstacle may have the same configuration as the temperature monitoring device (the temperature monitoring device and the detector can be used together).
以上の実施例は、標識体５をヒーター６が埋め込まれて
いない方の継手部（実施例では雌標識体101）に埋め込
んだ例であるが、当該標識体５をヒーター６が埋め込ま
れた方の継手部（実施例では雄継手部102）に埋め込ん
でもよい。但し、溶着監視のための温度測定は、溶着面
（外周壁104と内周壁105との接触面）について行なわれ
るのが理想的であり、この意味で、ヒーター６からの熱
が間接に伝達される側の継手部に標識体５を埋め込む構
成（実施例の構成）がよりよい。The above embodiment is an example in which the marker 5 is embedded in the joint portion (female marker 101 in the embodiment) in which the heater 6 is not embedded, but the marker 5 is embedded in the heater 6. It may be embedded in the joint portion (the male joint portion 102 in the embodiment). However, the temperature measurement for welding monitoring is ideally performed on the welding surface (contact surface between the outer peripheral wall 104 and the inner peripheral wall 105), and in this sense, the heat from the heater 6 is indirectly transmitted. The configuration (embodiment configuration) in which the marker 5 is embedded in the joint portion on the right side is better.
第３図及び第４図は、ヒーター６をループコイルに兼用
するようにした実施例を示す。すなわち、第１図（Ｂ）
に示すように、ヒーター６はコイル状に巻回されている
ので、これをそのままループコイルとして使用できる。
但し、この実施例ではヒーター６と標識体５とが同一の
継手部（雌継手部101又は雄継手部102）に埋め込まれる
ことになる。3 and 4 show an embodiment in which the heater 6 also serves as a loop coil. That is, FIG. 1 (B)
As shown in, the heater 6 is wound in a coil shape, and thus can be used as it is as a loop coil.
However, in this embodiment, the heater 6 and the marker 5 are embedded in the same joint portion (female joint portion 101 or male joint portion 102).
第３図に示す標識体５は、ヒーター６の全てをループコ
イルとして使用しており、標識体５で授受される信号
（高周波信号）に対して電源８側のインピーダンスを高
くして当該信号の減衰を少なくするために、当該電源８
とヒーター６の間にチョークコイル11が挿入されてい
る。The marker 5 shown in FIG. 3 uses all of the heaters 6 as a loop coil, and increases the impedance of the power source 8 side with respect to the signal (high-frequency signal) transmitted / received by the marker 5 to increase the impedance of the signal. In order to reduce the attenuation, the power source 8
A choke coil 11 is inserted between the heater 6 and the heater 6.
第４図に示す標識体５は、ヒーター６に中間タップを設
け、ヒーター６を部分的にループコイルとして使用する
（602部分）ようにしており、当該ヒーター６のループ
コイルとして使用しない部分（601部分）が第３図に於
けるチョークコイル11の機能を果している。従って当該
601部分が充分な値のインピーダンスを有すれば、第３
図にようにチョークコイル11を使用する必要はない。In the marker body 5 shown in FIG. 4, the heater 6 is provided with an intermediate tap so that the heater 6 is partially used as a loop coil (602 portion), and the portion not used as the loop coil of the heater 6 (601 portion) is used. (Part) serves the function of the choke coil 11 in FIG. Therefore
If the 601 part has a sufficient impedance, the third
It is not necessary to use the choke coil 11 as shown.
以上に説明したように、本発明は、共振周波数が温度変
化によって一定の関係で変化する特性の圧電振動体とル
ープコイルとを並列接続してなる標識体を埋設管の一方
の継手部に埋め込んだものであり、継手部プラスチック
部分の温度を監視しているので埋設施工時の埋設管の溶
着連結監視がより確実に行なえ、埋設後は上記標識体を
そのまま使用して埋設位置探知が可能であり、かつ埋設
位置探知とともに埋設管の障害検出をも行なうようにす
ることができる。また、標識体は埋設管と同時に埋設さ
れるので、施工が容易であり、かつ長期にわたって標識
体が埋設管位置からずれることがない等、本発明は多く
の効果がある。As described above, according to the present invention, a marker formed by connecting in parallel a piezoelectric vibrating body having a characteristic in which a resonance frequency changes in a constant relationship due to a temperature change and a loop coil are embedded in one joint portion of an embedded pipe. Since the temperature of the plastic part of the joint is monitored, the welded connection of the buried pipe can be monitored more reliably during the burial work, and the buried position can be detected after the burial by using the above-mentioned marking body as it is. In addition, it is possible to detect the buried position and detect the failure of the buried pipe. Further, since the marker is buried at the same time as the buried pipe, the construction is easy, and the marker does not deviate from the position of the buried pipe for a long period of time.
図面はいずれも本発明の実施例を示すもので、第１図
（Ａ），（Ｂ）は埋設管継手部の断面図、第２図、第３
図及び第４図は回路図、第５図は埋設管探知方法を示す
図である。 （主な記号） １……埋設管、２……ループコイル ３……圧電振動体（水晶振動子） ５……標識体、６……ヒーター ９……探知器、101……雌継手部 102……雄継手部。Each of the drawings shows an embodiment of the present invention, and FIGS. 1 (A) and (B) are sectional views of a buried pipe joint portion, FIG. 2 and FIG.
4 and 5 are circuit diagrams, and FIG. 5 is a diagram showing a buried pipe detecting method. (Main symbols) 1 ... Built-in pipe, 2 ... Loop coil 3 ... Piezoelectric vibrator (quartz oscillator) 5 ... Marker, 6 ... Heater 9 ... Detector, 101 ... Female joint 102 ...... Male joint section.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｇ０１Ｋ 7/32 Ｇ０１Ｖ 3/12 Ｂ 9406−2Ｇ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location G01K 7/32 G01V 3/12 B 9406-2G
Claims (3)
て、一方の継手部にヒーターが埋め込まれており、一方
の管の雌継手部と他方の管の雄継手部を嵌合させたのち
上記ヒーターに通電して上記継手部相互を熱溶着させて
管相互を結合するようにしたプラスチック埋設管に於い
て、共振周波数が温度変化によって一定の関係で変化す
る特性の圧電振動体とループコイルとを並列接続してな
る標識体を上記継手部の一方に埋め込んだプラスチック
埋設管標識装置。1. A joint portion at both ends is formed in a male-female relationship, a heater is embedded in one joint portion, and a female joint portion of one pipe and a male joint portion of the other pipe are fitted to each other. After that, in a plastic buried pipe in which the heaters are energized to heat-weld the joint parts to couple the pipes together, a piezoelectric vibrating body having a characteristic that the resonance frequency changes in a constant relationship due to temperature change A plastic-embedded pipe marking device in which a marking body formed by connecting a loop coil in parallel is embedded in one of the joint portions.
手部に埋め込んだ特許請求の範囲第１項に記載のプラス
チック埋設管標識装置。2. The plastic-embedded pipe marking device according to claim 1, wherein the marking body is embedded in a joint portion in which a heater is not embedded.
埋め込み、上記ヒーターを標識体のループコイルとした
特許請求の範囲第１項に記載のプラスチック埋設管標識
装置。3. The plastic embedded pipe marking device according to claim 1, wherein the marking body is embedded in a joint portion in which a heater is embedded, and the heater is a loop coil of the marking body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13092487A JPH0785110B2 (en) | 1987-05-27 | 1987-05-27 | Plastic tube marking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13092487A JPH0785110B2 (en) | 1987-05-27 | 1987-05-27 | Plastic tube marking device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16172193A Division JPH0789152B2 (en) | 1993-06-30 | 1993-06-30 | Plastic buried pipe marking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63295986A JPS63295986A (en) | 1988-12-02 |
| JPH0785110B2 true JPH0785110B2 (en) | 1995-09-13 |
Family
ID=15045915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13092487A Expired - Fee Related JPH0785110B2 (en) | 1987-05-27 | 1987-05-27 | Plastic tube marking device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0785110B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0439483A (en) * | 1990-06-04 | 1992-02-10 | Kubota Corp | Underground buried pipe |
| JPH04319640A (en) * | 1991-04-18 | 1992-11-10 | Yagi Antenna Co Ltd | Water leakage detecting device |
| JP2823422B2 (en) * | 1992-04-13 | 1998-11-11 | 積水化学工業株式会社 | Connection structure of plastic buried pipe |
| JPH0789152B2 (en) * | 1993-06-30 | 1995-09-27 | 明星電気株式会社 | Plastic buried pipe marking device |
| KR100607574B1 (en) | 2006-01-25 | 2006-08-03 | 이복현 | Plastic pipe with wire for pipeline detection |
-
1987
- 1987-05-27 JP JP13092487A patent/JPH0785110B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63295986A (en) | 1988-12-02 |
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