JPH0979471A - Polyethylene resin socket coupling and detecting method for socket coupling - Google Patents
Polyethylene resin socket coupling and detecting method for socket couplingInfo
- Publication number
- JPH0979471A JPH0979471A JP7262339A JP26233995A JPH0979471A JP H0979471 A JPH0979471 A JP H0979471A JP 7262339 A JP7262339 A JP 7262339A JP 26233995 A JP26233995 A JP 26233995A JP H0979471 A JPH0979471 A JP H0979471A
- Authority
- JP
- Japan
- Prior art keywords
- socket joint
- polyethylene
- heating wire
- capacitor
- ground
- 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.)
- Pending
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
- 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
- B29C65/348—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 with a polymer coating
-
- 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
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- 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
- B29C66/50—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
- B29C66/5229—Joining tubular articles involving the use of a socket
-
- 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
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はガス，水道或は下水道等
の配管部材として用いられるポリエチレン樹脂製管材
（以下、ポリエチレン管と略記する）のうち、特に直管
の接続に際して使用されるソケット型継手（ＥＦ継手）
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyethylene resin pipe material (hereinafter abbreviated as polyethylene pipe) used as a pipe member for gas, water supply, sewerage, etc. Joint (EF joint)
Regarding
【０００２】[0002]
【従来の技術】近時、ガス，水道或は下水道等の配管部
材としては、地震等が起きた場合の振動や衝撃に強く、
また、地中環境における耐蝕性の面でも優れているポリ
エチレン管が多用されるようになってきている。このポ
リエチレン管のうち、特に直管の地中配管に際して、ポ
リエチレン管同志の接続にはポリエチレン樹脂製ソケッ
ト継手（以下、ソケット継手と略記する）が用いられて
いる。この従来のソケット継手は図５に示ように、ポリ
エチレン管挿入口となる開口部４を有する筒状の継手本
体１の内面に通電発熱用の電熱線２を螺旋体状に設け、
外部電源の接続端子３、３を継手本体１の外面に設けて
いるものである。なお、図５(a) は従来のソケット継手
の斜視図、また図５(b) は従来のソケット継手の縦断面
図である。2. Description of the Related Art Recently, as a piping member for gas, water supply, sewerage, etc., it is strong against vibration and shock when an earthquake occurs.
In addition, polyethylene pipes, which are also excellent in corrosion resistance in the underground environment, have come to be widely used. Among these polyethylene pipes, particularly in the case of straight underground pipes, a polyethylene resin socket joint (hereinafter abbreviated as socket joint) is used to connect the polyethylene pipes together. In this conventional socket joint, as shown in FIG. 5, a heating wire 2 for energizing and generating heat is provided in a spiral shape on the inner surface of a cylindrical joint body 1 having an opening 4 serving as a polyethylene pipe insertion port.
The connection terminals 3 and 3 of the external power source are provided on the outer surface of the joint body 1. 5A is a perspective view of a conventional socket joint, and FIG. 5B is a vertical sectional view of the conventional socket joint.
【０００３】ポリエチレン管同志をソケット継手を用い
て接続する方法の一例を図５および図６を用いて説明す
る。先ず図５に示すソケット継手７’の開口部４より継
手本体１内へポリエチレン管１０の管端を挿入する。次
に、外部電源接続コネクター（図示せず）を接続端子
３、３に差し込み、ソケット継手７’に内包された電熱
線２に規定時間，規定の電流を流し，継手本体１内側と
ポリエチレン管１０、１０の管端外側を加熱融着する電
気融着（Electoro Fusion)を行なう。このようにしてポ
リエチレン管１０、１０とソケット継手７’の融着接続
が完了し、図６に縦断面図で示すポリエチレン配管２
０’が形成される。なお、前記電熱線２としては、図２
に示すように、発熱線２ａにポリエチレン樹脂２ｂを被
覆したポリエチレン被覆電熱線２が通常用いられる。前
記ポリエチレン配管２０’は、そのままの状態で地中埋
設される場合もあるが、その後の保全管理のために、ポ
リエチレン配管２０’にロケーティングワイヤとして導
電性ワイヤを沿わせてから地中埋設するのが一般的であ
る（図示せず）。An example of a method for connecting polyethylene pipes using a socket joint will be described with reference to FIGS. 5 and 6. First, the pipe end of the polyethylene pipe 10 is inserted into the joint body 1 through the opening 4 of the socket joint 7'shown in FIG. Next, an external power supply connection connector (not shown) is inserted into the connection terminals 3 and 3, and a specified current is applied to the heating wire 2 contained in the socket joint 7 ′ for a specified time, and the inside of the joint body 1 and the polyethylene pipe 10 are connected. The electric fusion (Electoro Fusion) of heat-sealing the outside of the tube end of No. 10 is performed. In this way, the fusion connection between the polyethylene pipes 10 and 10 and the socket joint 7'is completed, and the polyethylene pipe 2 shown in the longitudinal sectional view in FIG.
0 'is formed. It should be noted that the heating wire 2 is as shown in FIG.
As shown in, a polyethylene-coated heating wire 2 in which the heating wire 2a is covered with a polyethylene resin 2b is usually used. The polyethylene pipe 20 'may be buried in the ground as it is, but for the purpose of maintenance management thereafter, a conductive wire is placed along the polyethylene pipe 20' as a locating wire before being buried in the ground. Is common (not shown).
【０００４】[0004]
【発明が解決しようとする課題】前記ポリエチレン配管
にロケーティングワイヤを設けたものは、地中埋設後、
パイプロケーターによってその配管位置を地上から推定
できるようになっているが、ポリエチレン配管の継手個
所であるポリエチレン継手部の位置までは推定できない
状態であった。即ち、従来はポリエチレン継手は地中埋
設後その位置確認が容易になされる状態になかった。そ
のため、その後の保全、故障或は万が一の事故等に際し
ては、保全作業や掘り起こし作業に多くの時間や労力が
かかってしまうという問題があった。The polyethylene pipe provided with a locating wire has the following problems.
Although the pipe locator allows the position of the pipe to be estimated from the ground, the position of the polyethylene joint, which is the joint for polyethylene pipe, cannot be estimated. That is, conventionally, the position of the polyethylene joint has not been easily confirmed after being buried in the ground. Therefore, there has been a problem that maintenance work and digging work require a lot of time and labor in the event of subsequent maintenance, failure, or accident.
【０００５】本発明は、上記従来技術が有する各種問題
点を解決するためになされたものであり、従来のソケッ
ト継手に改良を加えることにより、この継手がポリエチ
レン管と接続され、ポリエチレン配管として地中埋設さ
れた後も地上から容易に継手部を検出できるソケット継
手および地中埋設されたソケット継手の検出方法を提供
することを目的とする。The present invention has been made in order to solve the various problems of the above-mentioned prior art. By improving the conventional socket joint, this joint is connected to a polyethylene pipe to form a polyethylene pipe. An object of the present invention is to provide a socket joint in which the joint portion can be easily detected from the ground even after being buried underground, and a method for detecting a socket joint buried in the ground.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に本発明は、通電発熱用の電熱線を螺旋状に内包し、外
部電源接続用の両端子を有するソケット継手に於いて、
前記外部電源接続用の両端子間に、少なくとも一方の端
子との接続，非接続を可能にしたコンデンサを設け、コ
ンデンサの非接続時は，前記両端子に外部電源を接続し
て通電し，電熱線を発熱可能とし、またコンデンサの接
続時は，該コンデンサと電熱線によってＬＣ閉回路が形
成できるソケット継手にある。また本発明は、前記通電
発熱用の電熱線がポリエチレン被覆電熱線であるソケッ
ト継手にある。In order to achieve the above object, the present invention provides a socket joint having a heating wire for energizing and heating in a spiral shape and having both terminals for connecting an external power source.
A capacitor that can be connected to and disconnected from at least one terminal is provided between both terminals for connecting the external power supply.When the capacitor is not connected, an external power supply is connected to both terminals to energize and A socket joint that can generate heat from a heating wire and can form an LC closed circuit with the heating wire and the capacitor when the capacitor is connected. The present invention also resides in a socket joint, wherein the heating wire for heating by energization is a polyethylene-coated heating wire.
【０００７】また本発明は、前記ＬＣ閉回路が形成でき
るソケット継手を介してポリエチレン管同志を融着接続
してポリエチレン配管となし、該ポリエチレン配管が地
中に埋設された後も、地上に設けた発信回路と受信回路
からなる検出装置によってソケット継手の埋設位置が検
出できるようにしたソケット継手の検出方法にある。Further, according to the present invention, polyethylene pipes are fused and connected to each other through a socket joint capable of forming the LC closed circuit to form polyethylene pipes, and the polyethylene pipes are provided on the ground even after being buried in the ground. Another method is to detect a socket joint so that the embedded position of the socket joint can be detected by a detecting device including a transmitting circuit and a receiving circuit.
【０００８】前記外部電源接続用の両端子間に、少なく
とも一方の端子との接続，非接続を可能にコンデンサを
設ける方法としては、コンデンサのリード線をねじ締め
等により端子へ取り付ける方法、外部電源接続コネクタ
ーが端子に差し込まれたときにコンデンサとの接続が切
れる端子スイッチを設ける方法、コンデンサのリード線
と端子間にスイッチを設ける方法、或はコンデンサのリ
ード線と端子間にミニプラグ・ジャックを設ける方法等
がある。As a method of providing a capacitor between both terminals for connecting the external power source so that at least one terminal can be connected or disconnected, a method of attaching a lead wire of the capacitor to the terminal by screwing or the like, an external power source A method of providing a terminal switch that disconnects the capacitor when the connection connector is inserted into the terminal, a method of providing a switch between the capacitor lead wire and the terminal, or a mini plug jack between the capacitor lead wire and the terminal. There is a method of setting.
【０００９】[0009]
【作用】従来は、ポリエチレン管同志を従来のソケット
継手によって融着接続したポリエチレン配管が地中埋設
された場合、継手部分は本来の機能である継手としての
役割を継続するだけのものであった。[Function] Conventionally, when the polyethylene pipe in which the polyethylene pipes are fusion-bonded to each other by the conventional socket joint is buried in the ground, the joint portion only continues to function as the joint which is the original function. .
【００１０】一方、本発明のソケット継手は、通電発熱
用の電熱線を螺旋状に内包し，外部電源接続用の端子を
有するソケット継手と基本部分は同一であるが、前記外
部電源接続用の両端子間に、少なくとも一方の端子との
接続，非接続を可能にコンデンサが設けられているの
で、本発明のソケット継手を用いてポリエチレン管同志
を接続する際，コンデンサと端子とを非接続の状態とす
ることができる。従って、端子より電熱線に通電可能と
なり、ポリエチレン管外面とソケット継手内面の溶融接
着をすることができる。On the other hand, the socket joint of the present invention is basically the same as the socket joint having a heating wire for energization and heat generation in a spiral shape and having a terminal for connecting an external power source, but the socket joint for connecting the external power source is the same. Since a capacitor is provided between both terminals so that at least one terminal can be connected and disconnected, when connecting the polyethylene pipes using the socket joint of the present invention, the capacitor and the terminal are not connected. It can be in a state. Therefore, the heating wire can be energized from the terminal, and the outer surface of the polyethylene pipe and the inner surface of the socket joint can be melt-bonded.
【００１１】また電熱線にコンデンサが接続された状態
では、該コンデンサと電熱線により，電磁誘導による被
検出回路となるＬＣ閉回路が形成できるので、発信回路
と受信回路からなる検出装置を用いることによって地中
埋設されたソケット継手のＬＣ閉回路、すなわちソケッ
ト継手の存在位置を地上から検出することが可能とな
る。When a capacitor is connected to the heating wire, an LC closed circuit to be a circuit to be detected by electromagnetic induction can be formed by the capacitor and the heating wire. Therefore, a detector including a transmitter circuit and a receiver circuit should be used. Thus, the LC closed circuit of the socket joint buried in the ground, that is, the position where the socket joint is present can be detected from the ground.
【００１２】[0012]
【実施例】本発明のソケット継手および地中埋設された
ソケット継手の検出方法について図を用いて詳細に説明
する。図１(a) は本発明のソケット継手の一実施例を示
す斜視図、また図１(b) は本発明のソケット継手の一実
施例を示す縦断面図である。図２は本発明のソケット継
手に用いるポリエチレン樹脂被覆電熱線を示す断面図で
ある（従来例にも使用）。図３は本発明のソケット継手
のＬＣ閉回路を示す回路図である。また、図４は本発明
のソケット継手を用いたポリエチレン配管を示す縦断面
図である。これらの図において、１は継手本体、２は電
熱線（ポリエチレン樹脂被覆電熱線）、２ａは発熱線、
２ｂはポリエチレン樹脂、３ａ，３ｂは接続端子、４は
開口部、５はコンデンサ、７はソケット継手、１０はポ
リエチレン管、また２０はポリエチレン配管である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A socket joint and a method for detecting a socket joint buried in the ground according to the present invention will be described in detail with reference to the drawings. 1 (a) is a perspective view showing an embodiment of the socket joint of the present invention, and FIG. 1 (b) is a longitudinal sectional view showing an embodiment of the socket joint of the present invention. FIG. 2 is a sectional view showing a polyethylene resin-coated heating wire used in the socket joint of the present invention (also used in the conventional example). FIG. 3 is a circuit diagram showing an LC closed circuit of the socket joint of the present invention. FIG. 4 is a vertical sectional view showing a polyethylene pipe using the socket joint of the present invention. In these figures, 1 is a joint body, 2 is a heating wire (polyethylene resin-coated heating wire), 2a is a heating wire,
2b is a polyethylene resin, 3a and 3b are connection terminals, 4 is an opening, 5 is a capacitor, 7 is a socket joint, 10 is a polyethylene pipe, and 20 is a polyethylene pipe.
【００１３】実施例１ ソケット継手の製造 ソケット継手の製造について図１および図２を用いて説
明する。先ず、図２に示すように、通電発熱用の電熱線
として、線径が０．５５ｍｍφの発熱線２ａに０．５５
ｍｍ厚さのポリエチレン樹脂２ｂを押し出し被覆し、外
径が１．６５ｍｍのポリエチレン樹脂被覆電熱線２を製
造する。続いて図１に示すように、前記電熱線２を口径
１０Ａのソケット継手本体１に螺旋状に内包させ、外部
電源接続用の端子３ａ，３ｂを設ける。続いてコンデン
サ５の一方のリード線６ａを前記接続端子３ｂにねじ止
めし，また他方のリード線６ａは端子３ａにねじ止めし
ないで遊ばせておき本発明のソケット継手７を製造し
た。Example 1 Manufacturing of Socket Joint Manufacturing of the socket joint will be described with reference to FIGS. 1 and 2. First, as shown in FIG. 2, a heating wire 2a having a diameter of 0.55 mmφ is provided with 0.55 as a heating wire for energizing and heating.
A polyethylene resin 2b having a thickness of mm is extrusion-coated to manufacture a polyethylene resin-coated heating wire 2 having an outer diameter of 1.65 mm. Subsequently, as shown in FIG. 1, the heating wire 2 is spirally included in the socket joint body 1 having a diameter of 10 A, and terminals 3a and 3b for external power supply connection are provided. Subsequently, one lead wire 6a of the capacitor 5 was screwed to the connecting terminal 3b, and the other lead wire 6a was left unscrewed to the terminal 3a to allow the socket joint 7 of the present invention to be manufactured.
【００１４】ソケット継手とポリエチレン管との融着 ソケット継手とポリエチレン管との融着について図１、
図３および図４を用いて説明する。先ず、他方のリード
線６ａを端子３ａにねじ止めしないで遊ばせておいた前
記図１に示す本発明のソケット継手７に開口部４、４よ
り口径１０Ａのポリエチレン管１０、１０の管端を挿入
する。次に、外部電源接続コネクター（図示せず）を接
続端子３ａ，３ｂに差し込み、ソケット継手７に内包さ
れた電熱線２に規定時間，規定の電流を流し，継手本体
１内側とポリエチレン管１０、１０の管端外側を加熱融
着する電気融着を行なう。続いて前記コンデンサ５の他
方のリード線６ａを接続端子３ａにねじ止めすることに
よりコンデンサ５と電熱線２によって図３に示すＬＣ閉
回路を形成させた。続いてコンデンサ５と接続端子３
ａ，３ｂにシリコン樹脂を用いて防湿処理を施した後ポ
リ塩化ビニル樹脂製の保護具を施し（図示せず）ポリエ
チレン配管２０とした。Fusion of socket joint and polyethylene pipe Regarding fusion of socket joint and polyethylene pipe FIG.
This will be described with reference to FIGS. First, the other end of the lead wire 6a is not screwed to the terminal 3a, but is loosened and inserted into the socket joint 7 of the present invention shown in FIG. To do. Next, an external power supply connection connector (not shown) is inserted into the connection terminals 3a and 3b, and a specified current is applied to the heating wire 2 contained in the socket joint 7 for a specified time, and the inside of the joint body 1 and the polyethylene pipe 10 are connected. Electrofusion is performed by heating and welding the outside of the tube end of No. 10. Subsequently, the other lead wire 6a of the capacitor 5 was screwed to the connection terminal 3a to form the LC closed circuit shown in FIG. 3 by the capacitor 5 and the heating wire 2. Then, the capacitor 5 and the connection terminal 3
Moisture-proofing treatment was applied to a and 3b using a silicone resin, and then a protection tool made of polyvinyl chloride resin was applied (not shown) to obtain a polyethylene pipe 20.
【００１５】ポリエチレン配管の地中埋設 前記ポリエチレン配管２０を地中１ｍの深さに埋設し
た。なお、ソケット継手７の埋設位置が分かるように地
上に表示した。Buried polyethylene pipe in the ground The polyethylene pipe 20 was buried in the ground at a depth of 1 m. In addition, it is displayed on the ground so that the buried position of the socket joint 7 can be seen.
【００１６】ソケット継手の検出方法 ソケット継手の検出方法について、検出装置の作製およ
び地中１ｍの深さに埋設したソケット継手を検出した例
を説明する。 １．検出装置の作製 発信コイルの作製 線径が０．３ｍｍのエナメル銅線を７４ｍｍφのフェラ
イトコアの外周に１００ターン巻回し、外径７５ｍｍの
発信コイルを作製した。 発信回路の形成 前記発信コイルに周波数が500kHzの電源を供給して発信
回路を形成した。 受信コイルの作製 線径が０．２ｍｍのエナメル銅線を１０ｍｍφのフェラ
イトコアの外周に1000ターン巻回し、外径５０ｍｍの受
信コイルを作製した。 受信回路の形成 前記受信コイルに増幅器及び検出表示用電圧計を結線し
て受信回路を形成した。 検出装置の作製 地上からの電磁誘導による検出装置として、前記の発
信回路との受信回路からなる検出装置を作製した（図
示せず）。Method for Detecting Socket Joint With respect to the method for detecting a socket joint, an example in which a detecting device is manufactured and a socket joint buried at a depth of 1 m in the ground is detected will be described. 1. Production of Detection Device Production of Transmitting Coil An enamel copper wire having a wire diameter of 0.3 mm was wound around the outer circumference of a ferrite core having a diameter of 74 mmφ for 100 turns to produce a transmitting coil having an outer diameter of 75 mm. Formation of Transmission Circuit A power supply having a frequency of 500 kHz was supplied to the transmission coil to form a transmission circuit. Preparation of Receiver Coil An enamel copper wire having a wire diameter of 0.2 mm was wound around a 10 mmφ ferrite core for 1000 turns to prepare a receiver coil having an outer diameter of 50 mm. Formation of Receiver Circuit A receiver circuit was formed by connecting an amplifier and a voltmeter for detection and display to the receiver coil. Production of Detection Device As a detection device by electromagnetic induction from the ground, a detection device including the above-mentioned transmission circuit and reception circuit was produced (not shown).
【００１７】２．ソケット継手の検出例 前記地中１ｍの深さに埋設された前記ポリエチレン配管
２０を被検出体とし、前記検出装置を用いソケット継手
７の検出を行なった。先ず、前記検出装置の電源を入れ
たり切ったりしながら、埋設された被検出体の地上付近
で検出装置を移動した結果、前記ソケット継手７の埋設
位置の直上に於いて検出用電圧計の針の振れが最大値と
なり、ソケット継手の埋設位置を検出することができ
た。また、本発明の検出方法により検出されたソケット
継手の埋設位置は地上に表示した埋設位置と一致したの
で、本発明のソケット継手の検出方法によりソケット継
手の埋設位置を正確に検出できることが分かった。2. Example of detection of socket joint Using the polyethylene pipe 20 buried at a depth of 1 m in the ground as a detected body, the socket joint 7 was detected using the detection device. First, as a result of moving the detection device near the ground of the buried detection object while turning on and off the power of the detection device, the needle of the detection voltmeter immediately above the buried position of the socket joint 7 is detected. The maximum runout was, and the buried position of the socket joint could be detected. Further, since the buried position of the socket joint detected by the detection method of the present invention coincided with the buried position displayed on the ground, it was found that the buried position of the socket joint can be accurately detected by the socket joint detection method of the present invention. .
【００１８】[0018]
【発明の効果】本発明によれば、従来ポリエチレン管の
溶融接着のための通電発熱の役割のみを有した螺旋状の
電熱線が、更にコンデンサを附加することによって、Ｌ
Ｃ閉回路を形成できるようになり、ポリエチレン配管の
地中埋設後も継手の位置確認が容易となった。従って、
埋設後において、故障時の対応や長期間にわたる保全管
理も容易かつ有効に行なえるようになり、布設後の管理
体制を一段と強化する手段となり得るものとなった。ま
たこれら地中埋設されたポリエチレン配管は社会的公共
性の強いものであり、安心，安全の面でもその効果は大
きなものがある。According to the present invention, the spiral heating wire, which conventionally has only the role of heat generation by energization for fusion bonding of polyethylene pipes, is further provided with a capacitor, and
The C closed circuit can be formed, and the position of the joint can be easily confirmed even after the polyethylene pipe is buried in the ground. Therefore,
After burial, it became possible to easily and effectively deal with failures and long-term maintenance management, and it became a means to further strengthen the management system after laying. In addition, these polyethylene pipes buried underground have strong social publicity, and have a great effect in terms of safety and security.
【図１】(a) は本発明のソケット継手の一実施例を示す
斜視図である。(b) は本発明のソケット継手の一実施例
を示す縦断面図である。FIG. 1A is a perspective view showing an embodiment of a socket joint of the present invention. (b) is a longitudinal sectional view showing an embodiment of the socket joint of the present invention.
【図２】本発明のソケット継手に用いるポリエチレン樹
脂被覆電熱線を示す横断面図である。（従来例にも使
用）FIG. 2 is a cross-sectional view showing a polyethylene resin-coated heating wire used in the socket joint of the present invention. (Used in the conventional example)
【図３】本発明のソケット継手のＬＣ閉回路を示す回路
図である。FIG. 3 is a circuit diagram showing an LC closed circuit of the socket joint of the present invention.
【図４】本発明のソケット継手を用いたポリエチレン配
管を示す縦断面図である。FIG. 4 is a vertical cross-sectional view showing a polyethylene pipe using the socket joint of the present invention.
【図５】(a) は従来のソケット継手を示す斜視図であ
る。(b) は従来のソケット継手を示す縦断面図である。FIG. 5 (a) is a perspective view showing a conventional socket joint. (b) is a longitudinal sectional view showing a conventional socket joint.
【図６】従来のソケット継手を用いたポリエチレン配管
を示す縦断面図である。FIG. 6 is a vertical cross-sectional view showing a polyethylene pipe using a conventional socket joint.
１ 継手本体 ２ 電熱線（ポリエチレン樹脂被覆電熱線） ３ａ，３ｂ 接続端子 ４ 開口部 ５ コンデンサ ６ａ，６ｂ リード線 ７ ソケット継手 １０ ポリエチレン管 ２０ ポリエチレン配管 1 Joint Body 2 Heating Wire (Polyethylene Resin Coated Heating Wire) 3a, 3b Connection Terminal 4 Opening 5 Capacitor 6a, 6b Lead Wire 7 Socket Joint 10 Polyethylene Pipe 20 Polyethylene Piping
───────────────────────────────────────────────────── フロントページの続き (72)発明者 久保田 節 長野県上田市大字大屋300番地 東京特殊 電線株式会社上田工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Setsu Kubota 300 Oya Oya, Ueda City, Nagano Prefecture Tokyo Special Electric Cable Co., Ltd. Ueda Factory
Claims (3)
外部電源接続用の両端子を有するポリエチレン樹脂製ソ
ケット継手に於いて、 前記外部電源接続用の両端子間に、少なくとも一方の端
子との接続，非接続を可能にしたコンデンサを設け、コ
ンデンサの非接続時は，前記両端子に外部電源を接続し
て通電し，電熱線を発熱可能とし、またコンデンサの接
続時は，該コンデンサと電熱線によってＬＣ閉回路が形
成できることを特徴とするポリエチレン樹脂製ソケット
継手。1. A heating wire for energizing and heating is spirally included,
In a polyethylene resin socket joint having both terminals for connecting an external power source, a capacitor that enables connection and disconnection with at least one terminal is provided between both terminals for connecting the external power source, and At the time of connection, an external power source is connected to both terminals to energize the heating wire to generate heat, and at the time of connection of a capacitor, an LC closed circuit can be formed by the capacitor and the heating wire. Socket fitting.
被覆電熱線であることを特徴とする請求項１記載のポリ
エチレン樹脂製ソケット継手。2. The polyethylene resin socket joint according to claim 1, wherein the heating wire for energization and heat generation is a polyethylene-coated heating wire.
ン樹脂製ソケット継手を介してポリエチレン樹脂製管材
同志を融着接続してポリエチレン配管となし、該ポリエ
チレン配管が地中に埋設された後も、地上に設けた発信
回路と受信回路からなる検出装置によってソケット継手
の埋設位置が検出できるようにしたことを特徴とするソ
ケット継手の検出方法。3. A polyethylene resin pipe material is fusion-bonded through the polyethylene resin socket joint according to claim 1 or 2 to form a polyethylene pipe, and even after the polyethylene pipe is buried in the ground, A method for detecting a socket joint, characterized in that the embedded position of the socket joint can be detected by a detection device provided on the ground and comprising a transmission circuit and a reception circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7262339A JPH0979471A (en) | 1995-09-13 | 1995-09-13 | Polyethylene resin socket coupling and detecting method for socket coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7262339A JPH0979471A (en) | 1995-09-13 | 1995-09-13 | Polyethylene resin socket coupling and detecting method for socket coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0979471A true JPH0979471A (en) | 1997-03-25 |
Family
ID=17374387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7262339A Pending JPH0979471A (en) | 1995-09-13 | 1995-09-13 | Polyethylene resin socket coupling and detecting method for socket coupling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0979471A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101416672B1 (en) * | 2013-01-29 | 2014-07-09 | 경상대학교산학협력단 | Pipe connecting device |
| KR102301432B1 (en) * | 2021-02-09 | 2021-09-14 | 케이유피피(주) | Pipe assembly, pipe assembly detection system and construction method equipped with the same |
-
1995
- 1995-09-13 JP JP7262339A patent/JPH0979471A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101416672B1 (en) * | 2013-01-29 | 2014-07-09 | 경상대학교산학협력단 | Pipe connecting device |
| KR102301432B1 (en) * | 2021-02-09 | 2021-09-14 | 케이유피피(주) | Pipe assembly, pipe assembly detection system and construction method equipped with the same |
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