JP4637085B2 - Cannula unit for end-of-air connection - Google Patents

Cannula unit for end-of-air connection Download PDF

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JP4637085B2
JP4637085B2 JP2006346589A JP2006346589A JP4637085B2 JP 4637085 B2 JP4637085 B2 JP 4637085B2 JP 2006346589 A JP2006346589 A JP 2006346589A JP 2006346589 A JP2006346589 A JP 2006346589A JP 4637085 B2 JP4637085 B2 JP 4637085B2
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power cable
cannula
conductor
insulating
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浩正 佐藤
亮仙 桑木
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株式会社エクシム
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Description

本発明は、発電所、変電所などに配置される電力機器や架空送電線と電力ケーブルとを接続する電力ケーブルの終端接続部に関し、特に、気中終端接続部及び気中終端接続部用套管ユニットに関する。   The present invention relates to a power cable termination connection part for connecting a power device or an overhead power transmission line and a power cable arranged in a power plant, a substation, and the like, in particular, an air termination connection part and an air termination connection part. Regarding the tube unit.

一般に、CV(架橋ポリエチレン絶縁)ケーブル等の電力ケーブルには、絶縁体内の電界ストレスを緩和するため、絶縁体上に遮蔽層(外部半導電層)が設けられている。このような電力ケーブルの終端接続部を組み立てる場合、ただ単に遮蔽層を取り除くのみでは、遮蔽層端部に電界が集中し、絶縁体である架橋ポリエチレンの破壊を引き起こすおそれがある。そのため、特に高電圧用の電力ケーブルの終端接続部では、電界ストレスが集中しないよう、様々な工夫が施されている。   In general, a power cable such as a CV (crosslinked polyethylene insulation) cable is provided with a shielding layer (external semiconductive layer) on the insulator in order to reduce electric field stress in the insulator. When assembling such a terminal connection portion of a power cable, simply removing the shielding layer may concentrate the electric field at the end of the shielding layer, and may cause destruction of the crosslinked polyethylene as an insulator. For this reason, various measures are taken so that electric field stress is not concentrated particularly at the terminal connection portion of the high-voltage power cable.

例えば、大気中で使用される終端接続部としての気中終端接続部は、プレモールドのゴム製のストレスコーン(電界緩和絶縁補強層)を用いたプレハブ式(特許文献1参照)のものや、油浸絶縁紙内に配置された薄い金属箔電極間の静電容量を適当に分布させてなるコンデンサコーンを用いた油浸式(特許文献2参照)のものなどがある。   For example, the air termination connection portion as a termination connection portion used in the atmosphere is a prefabricated type using a pre-molded rubber stress cone (electric field relaxation insulating reinforcement layer) (see Patent Document 1), There is an oil immersion type (see Patent Document 2) using a capacitor cone in which electrostatic capacitance between thin metal foil electrodes arranged in oil immersion insulating paper is appropriately distributed.

例えば、プレハブ式の気中終端接続部では、筒状の碍管内において、電力ケーブルの導体の端部に導体引出棒が圧縮接続され、段剥ぎして露出した絶縁体上に紡錘状のストレスコーンを被嵌している。   For example, in a prefabricated aerial termination connection, a conductor lead bar is compression-connected to the end of a power cable conductor in a cylindrical soot tube, and a spindle-shaped stress cone is formed on the insulator exposed by stripping. Is fitted.

このストレスコーンは、圧縮装置を介して、碍管内の下方に挿入固定されたエポキシ座に押圧固定されている。なお、この圧縮装置のスプリング力によりエポキシ座とストレスコーンとの界面及びストレスコーンとケーブル絶縁体との界面に適切な圧力を与え絶縁耐力を確保する。また、碍管の上部には導体引出棒および碍管を固定するための上部金具が固定され、これらを覆うように上部覆いが被されている。また、電力ケーブルは、碍管内において外部遮蔽層の接地がつけられた状態となっている。   The stress cone is pressed and fixed to an epoxy seat that is inserted and fixed in the lower part of the duct through a compression device. In addition, an appropriate pressure is applied to the interface between the epoxy seat and the stress cone and the interface between the stress cone and the cable insulator by the spring force of the compression device to ensure the dielectric strength. An upper metal fitting for fixing the conductor lead bar and the steel pipe is fixed to the top of the steel pipe, and an upper cover is covered so as to cover these. In addition, the power cable is in a state where the outer shielding layer is grounded in the pipe.

そして、この碍管内には、絶縁コンパウンドとして、絶縁油等の絶縁流体やSFガス(六フッ化硫黄)等の絶縁ガスが充填される。 And, within this porcelain bushing, as insulating compound, an insulating gas such as an insulating fluid and SF 6 gas such as an insulating oil (sulfur hexafluoride) is filled.

また、油浸式の気中終端接続部では、碍管内に挿入される電力ケーブルの導体端部にコンデンサコーンを主絶縁要素として用い、碍管内に、絶縁コンパウンドとして、絶縁油等の絶縁流体が充填される。   In addition, in the oil-immersed air termination connection part, a condenser cone is used as a main insulating element at the conductor end of the power cable inserted into the soot pipe, and insulating fluid such as insulating oil is used as an insulating compound in the soot pipe. Filled.

このようなプレハブ式や油浸式の気中終端接続部においては、電力ケーブルの端末のケーブル導体と導体引出棒との接続部分を収容する碍管は、一般的に、磁器製であり、高電圧になるにつれ、太く長尺となるとともに重量が重くなり扱いにくく作業効率が悪くなるという問題がある。   In such a prefabricated or oil-immersed air termination connection part, the soot tube that accommodates the connection part between the cable conductor of the end of the power cable and the conductor lead bar is generally made of porcelain and has a high voltage. However, there is a problem that it becomes thicker and longer and becomes heavier and difficult to handle, resulting in poor work efficiency.

また、上記構成の気中終端接続部では、碍管内には、液体や気体の絶縁コンパウンドが充填されている。このため、地震などの外的な負荷や経年によって絶縁コンパウンドの外部への流出防止のためのメンテナンスが必要となり面倒であった。   Moreover, in the air termination | terminus connection part of the said structure, the insulating compound of a liquid or a gas is filled in the soot tube. For this reason, maintenance to prevent the insulation compound from flowing out due to external loads such as earthquakes and aging has become necessary and troublesome.

これに対して、近年では、磁器製の碍管に代えてポリマー製の套管(碍管)を使用し、このポリマー碍管内に絶縁油や絶縁ガスを充填してなる複合碍管が知られている。
特開2000−261948号公報 特開2003−189454号公報
On the other hand, in recent years, there has been known a composite soot tube in which a polymer sheath tube (soot tube) is used instead of a porcelain soot tube, and this polymer soot tube is filled with insulating oil or insulating gas.
JP 2000-261948 A JP 2003-189454 A

しかしながら、従来の気中終端接続部において磁器碍管に代えて、ポリマー製の套管を使用した場合、套管が高分子材料のポリマーで形成されているため、ポリマー製の套管内に外部から水分が透過して、套管内の絶縁油や絶縁ガスに混入して、絶縁油や絶縁ガスの性能を劣化させる可能性がある。   However, when a polymer cannula is used in place of the porcelain soot tube in the conventional aerial terminal connection portion, since the cannula is made of a polymer material, moisture can be externally introduced into the polymer cannula. May penetrate into the insulating oil or insulating gas in the sleeve and degrade the performance of the insulating oil or insulating gas.

本発明はかかる点に鑑みてなされたものであり、高電圧の電力ケーブルの気中終端接続部に用いて、扱い易く、好適に気中終端接続部を組み立てることができる気中終端接続部用套管ユニット及び気中終端接続部を提供することを目的とする。   The present invention has been made in view of such a point, and is used for an air terminal connection part of a high-voltage power cable, which is easy to handle and can be suitably assembled to an air terminal connection part. An object is to provide a cannula unit and an air end connection.

本発明の気中終端接続部用套管ユニットは、筒状をなし、一端部側から電力ケーブル端末が挿入されるとともに、外周面を、襞部を有する樹脂製の絶縁外被部で被覆されたポリマー套管と、前記ポリマー套管内に当該ポリマー套管と同心上に配置され、前記一端部側から挿入される前記電力ケーブル端末に導通される導体引出棒と、前記ポリマー套管内の前記一端部側に配置され、前記一端部側から挿入される前記電力ケーブル端末を受容して前記導体引出棒と接続する受容部と、前記導体引出棒及び受容部の周囲を被覆する筒状をなし、外周面で前記ポリマー套管に被覆される絶縁筒部とを備え、前記ポリマー套管は、エポキシ樹脂又はFRPからなる筒状の本体部と、前記本体部の外周部分に、長手方向に配置された複数の襞部を有するシリコン樹脂からなる絶縁外被部とを有し、前記受容部は、エポキシ樹脂からなる筒状の受容部本体と、前記受容部本体内に配置された有底筒状の筒内導通部とを有し、前記受容部本体は、前記一端部側の開口で受容口を形成し、前記受容口を介して、前記一端部側から前記電力ケーブル端末の端部が挿入され、挿入された前記電力ケーブル端末の端部は、前記筒内導通部に電気的に接続させることによって前記導体引出棒と導通し、前記絶縁筒部は、前記導体引出棒及び前記受容部の外周面と、前記ポリマー套管の内周面との間に、前記絶縁外被部と同種のシリコン樹脂により形成されてなり、前記受容部に、前記電力ケーブル端末を装着した場合、前記電力ケーブル端末及び前記電力ケーブル端末の端部と前記絶縁筒部とは、前記受容部を介することで直接接しない、構成を採る。
The cannula unit for an air end connection part of the present invention has a cylindrical shape, and a power cable terminal is inserted from one end side, and the outer peripheral surface is covered with a resin insulation jacket part having a flange part. A polymer cannula, a conductor lead rod disposed concentrically with the polymer cannula in the polymer cannula and connected to the power cable end inserted from the one end side, and the one end in the polymer cannula arranged section side, said no a receiving portion connected to the conductor pull-out the power cable terminal inserted from one end receiving to, the tubular covering the external surface of the conductor pull-out and receiving unit, An insulating cylinder portion that is covered with the polymer sleeve on an outer peripheral surface, and the polymer sleeve is disposed in a longitudinal direction on a cylindrical main body portion made of epoxy resin or FRP and an outer peripheral portion of the main body portion. Have multiple buttocks And an insulating jacket parts made of silicon resin, wherein the receiving portion is made of epoxy resin tubular receptacle and the body, and said receptacle bottomed cylindrical cylinder conductive portion disposed within the body The receiving portion main body forms a receiving port with the opening on the one end side, and the end of the power cable terminal is inserted from the one end side through the receiving port, and the inserted power An end portion of the cable terminal is electrically connected to the conductor lead bar by being electrically connected to the in-cylinder conductive portion, and the insulating tube portion is configured to have an outer peripheral surface of the conductor lead rod and the receiving portion, and the polymer sleeve. between the inner peripheral surface of the pipe, the Ri Na is formed by silicone resin insulating jacket section and the same type, the receiving unit, when mounting the power cable terminal, wherein the power cable terminal and the power cable terminal The end portion of the tube and the insulating tube portion are the receiving portion. Not in direct contact by via, a configuration.

以上説明したように、本発明によれば、高電圧の電力ケーブルの気中終端接続部に用いて、扱い易く、好適に気中終端接続部を組み立てることができる。   As described above, according to the present invention, it is easy to handle and can be suitably assembled in the air termination connection portion of the high-voltage power cable.

以下、本発明の実施の形態について、図面を参照して詳細に説明する。なお、ここで、気中終端接続部は、電力ケーブルの終端部を、例えば、トランス、架空線、変電所の母線等に接続するものである。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Here, the air end connection part is for connecting the end part of the power cable to, for example, a transformer, an overhead line, a bus of a substation, and the like.

図1は、本発明の一実施の形態に係る気中終端接続部用套管ユニット100の構成を示す断面図である。   FIG. 1 is a cross-sectional view illustrating a configuration of a cannula unit 100 for an air end connection portion according to an embodiment of the present invention.

図1に示す気中終端接続部用套管ユニット100は、テーパが付けられた套管110と、套管110内に当該套管110と同心に配置された導体引出棒120と、套管110内に挿入されるケーブル導体を受容して導体引出棒120と接続する受容部130と、套管110内に配置され、導体引出棒120及び受容部130を被覆する絶縁筒部140とを有する。   A cannula unit 100 for an air end connection portion shown in FIG. 1 includes a cannula 110 having a taper, a conductor lead bar 120 disposed concentrically with the cannula 110 in the cannula 110, and the cannula 110. A receiving portion 130 that receives the cable conductor inserted therein and connects to the conductor drawing rod 120, and an insulating cylinder portion 140 that is disposed in the cannula 110 and covers the conductor drawing rod 120 and the receiving portion 130.

套管110は、筒状をなす本体部112を、ポリマー被覆材114で被覆することにより構成されている。套管110は、外周面に、基端側から先端側に向かってテーパが付けられて入れているため、基端部110a側の開口部が先端部110b側の開口部より径が大きくなっている。なお、本実施の形態の套管110は、外周面にテーパが付けられているものとしたが、これに限らずテーパが無く、基端部側及び先端部側の開口は同径の筒体であってもよい。   The cannula 110 is configured by covering a cylindrical body portion 112 with a polymer coating material 114. Since the cannula 110 is tapered on the outer peripheral surface from the proximal end side toward the distal end side, the opening on the proximal end portion 110a side has a larger diameter than the opening on the distal end portion 110b side. Yes. The sleeve 110 of the present embodiment is tapered on the outer peripheral surface, but is not limited to this, and the opening on the proximal end side and the distal end side is a cylindrical body having the same diameter. It may be.

基端部110a側から電力ケーブルの端部が挿入され、先端部110b側の開口部は、架空線や機器に接続される上部被覆部116により閉塞されている。   The end portion of the power cable is inserted from the base end portion 110a side, and the opening portion on the front end portion 110b side is closed by an upper covering portion 116 connected to an overhead wire or equipment.

套管110内に、挿入された電力ケーブルの端部は、絶縁処理が施された状態で、導体引出棒120を介して、先端部110b側の上部被覆部側に接続される架空線や機器などに電気的に接続される。   The end of the power cable inserted into the cannula 110 is insulated and subjected to an overhead wire or device connected to the upper covering portion side on the distal end portion 110b side through the conductor lead bar 120. Etc. are electrically connected.

本体部112は、機械的強度の高い材料、例えば、エポキシ樹脂やFRP(Fiber Reinforced Plastics)などの硬質プラスチック樹脂で形成されている。ここでは、FRPが用いられ、このFRP製の筒状の本体部112をポリマー被覆材114が被覆することにより、套管110の外被を形成している。   The main body 112 is made of a material having high mechanical strength, for example, a hard plastic resin such as an epoxy resin or FRP (Fiber Reinforced Plastics). Here, FRP is used, and the outer cover of the cannula 110 is formed by covering the cylindrical main body portion 112 made of FRP with a polymer coating material 114.

ポリマー被覆材(絶縁外被部)114は、電気絶縁性能に優れる材料、ここでは、シリコンポリマーなどの高分子材料により形成され、本体部112に一体的に設けられている。   The polymer coating material (insulation jacket portion) 114 is formed of a material having excellent electrical insulation performance, here, a polymer material such as silicon polymer, and is provided integrally with the main body portion 112.

また、ポリマー被覆材114は、本体部112の外周部分に長手方向に所定間隔を空けて配置された複数の襞部114aを有しており、この襞部114aにより套管110の一端部110a側と他端部110b側とが雨水などにより電気的に短絡することを防止する。   Further, the polymer coating material 114 has a plurality of flange portions 114a arranged at predetermined intervals in the longitudinal direction on the outer peripheral portion of the main body portion 112, and the end portions 110a side of the cannula 110 by the flange portions 114a. And the other end 110b side are prevented from being electrically short-circuited by rainwater or the like.

導体引出棒120は、導電性を有する筒状体であり、一端部122で上部被覆部116に電気的に接続され、他端部124で受容部130に可撓通電部150を介して導通した状態で接続されている。なお、本実施の形態では、導体引出棒120は導電性を有する筒状体としたが、これに限らず、中実の棒状体で構成してもよい。   The conductor extraction rod 120 is a cylindrical body having conductivity, and is electrically connected to the upper covering portion 116 at one end portion 122 and is electrically connected to the receiving portion 130 through the flexible energizing portion 150 at the other end portion 124. Connected in a state. In addition, in this Embodiment, although the conductor extraction rod 120 was made into the cylindrical body which has electroconductivity, you may comprise not only this but a solid rod-shaped body.

導体引出棒120は導電性を有するものであれば、どの様に構成されてもよく、撚り線などにより構成されてもよいが、ここでは、アルミ管を用いている。導体引出棒120は筒状であるため、その通電容量をケーブル導体より大きくした状態で径を大きくすることができる。   The conductor lead bar 120 may be configured in any manner as long as it has conductivity, and may be formed of a stranded wire or the like, but here, an aluminum tube is used. Since the conductor extraction rod 120 is cylindrical, the diameter can be increased in a state where the current carrying capacity is larger than that of the cable conductor.

受容部130は、套管110内において、基端部110a側に配置されており、套管110の基端部110aの開口縁部110cに取り付けられた平板環状の底部金具118に固定され、底部金具118の開口部から外方に開口する受容口130aで、電力ケーブルの端部を受容する。   The receiving portion 130 is disposed on the base end portion 110a side in the cannula 110, and is fixed to a flat plate-shaped bottom metal fitting 118 attached to the opening edge portion 110c of the base end portion 110a of the cannula 110. The end of the power cable is received by the receiving port 130a that opens outward from the opening of the metal fitting 118.

具体的に受容部130は、絶縁性を有する筒状の受容部本体132と、受容部本体132内に配置された有底筒状の筒内導通部134とを有し、電力ケーブルを受容して筒内導通部134に接続させることによって導体引出棒120と導通させる。   Specifically, the receiving portion 130 has a cylindrical receiving portion main body 132 having insulation properties, and a bottomed cylindrical in-cylinder conducting portion 134 disposed in the receiving portion main body 132, and receives a power cable. By connecting to the in-cylinder conducting portion 134, the conductor drawing rod 120 is conducted.

受容部本体132では、エポキシ樹脂などの絶縁性を有する部材から形成され、一端部側の開口で受容口130aを形成している。この受容口130aを底部金具118の開口部118aに連通させた状態で、受容部130は、底部金具118に固定されている。   The receiving portion main body 132 is formed from an insulating member such as an epoxy resin, and the receiving port 130a is formed by an opening on one end side. With the receiving port 130 a communicating with the opening 118 a of the bottom metal part 118, the receiving part 130 is fixed to the bottom metal part 118.

これら底部金具118の開口部118a及び受容口130aを介して、套管110の基端部110a側から電力ケーブルの端部が挿入され、挿入された電力ケーブルの端部は、筒内導通部134の接続部134aに電気的に接続される。   The end of the power cable is inserted from the base end 110a side of the cannula 110 through the opening 118a and the receiving port 130a of the bottom metal fitting 118, and the end of the inserted power cable is connected to the in-cylinder conductive portion 134. Is electrically connected to the connecting portion 134a.

受容部本体132では、他端部側端面から、受容部本体132内の筒内導通部134の底面に設けられた凸部134bが外方に突出している。この凸部134bは、気中終端接続部用套管ユニット100と同軸上に位置しており、可撓通電部150に導通した状態で接続されている。この凸部134bの外径は、導体引出棒120の外径と略同様の径である。   In the receiving portion main body 132, a convex portion 134 b provided on the bottom surface of the in-cylinder conductive portion 134 in the receiving portion main body 132 protrudes outward from the other end side end face. The convex portion 134 b is positioned coaxially with the air end connection portion sleeve unit 100 and is connected to the flexible energization portion 150 in a conductive state. The outer diameter of the convex portion 134b is substantially the same as the outer diameter of the conductor lead bar 120.

図2は、本発明の一実施の形態に係る気中終端接続部用套管ユニット100の可撓通電部150の一例を示す模式図であり、図2(a)は、同可撓通電部150の一例を示す要部断面図、図2(b)は、同可撓通電部150の導通筒状接続部の正面図である。   FIG. 2 is a schematic diagram showing an example of the flexible energization unit 150 of the cannula unit 100 for an air end connection unit according to the embodiment of the present invention, and FIG. FIG. 2B is a front view of a conductive cylindrical connecting portion of the flexible energizing portion 150. FIG.

図2に示すように、可撓通電部150は、導体引出棒120と受容部130とを、套管110の編曲に追従した状態で通電させるものであり、可撓性を有した状態で両者を接続するものである。   As shown in FIG. 2, the flexible energizing section 150 energizes the conductor lead bar 120 and the receiving section 130 in a state of following the arrangement of the cannula 110, and both of them are flexible. Are connected.

ここでは、可撓通電部150は、同軸上で突き合わせた状態で配置された導体引出棒120の他端部124と受容部130の凸部134bとを接続している。なお、図2(a)に示すように、導体引出棒120の他端部124には、端面が湾曲するフランジ126が設けられ、凸部134bの先端面にも同様のフランジ136が設けられている。   Here, the flexible energizing portion 150 connects the other end portion 124 of the conductor pull-out rod 120 and the convex portion 134b of the receiving portion 130 that are arranged in a state of being abutted on the same axis. As shown in FIG. 2A, the other end portion 124 of the conductor lead bar 120 is provided with a flange 126 whose end surface is curved, and a similar flange 136 is also provided on the front end surface of the convex portion 134b. Yes.

つまり、導体引出棒120と受容部130とは、導体引出棒120の他端部124の端面のフランジ126と、筒内導通部134の凸部134bにおける先端のフランジ136とが対向して接触した状態で配置されている。   That is, the conductor lead-out rod 120 and the receiving portion 130 are in contact with the flange 126 at the end surface of the other end portion 124 of the conductor lead-out rod 120 and the flange 136 at the tip of the convex portion 134b of the in-cylinder conductive portion 134. Arranged in a state.

可撓通電部150は、同軸上に配置された導体引出棒120の他端部124と凸部134bとの外周を被覆する導通筒状接続部152を有し、この導通筒状接続部152の内周面をそれぞれの外周面と面接触させることによって両者を導通させている。   The flexible energizing portion 150 has a conductive cylindrical connecting portion 152 that covers the outer periphery of the other end portion 124 and the convex portion 134b of the conductor lead bar 120 arranged on the same axis. The inner peripheral surface is brought into surface contact with the respective outer peripheral surfaces to make them conductive.

この導通筒状接続部152は、図2(b)に示すように、筒状体を軸方向に沿って複数分割してなる断面円弧状の複数の分割体152aからなる。   As shown in FIG. 2B, the conductive cylindrical connecting portion 152 includes a plurality of divided bodies 152a having a circular arc cross section obtained by dividing the cylindrical body into a plurality of pieces along the axial direction.

これら分割体152aのそれぞれの内面には、構成する筒状体の軸方向に離間する両端部分から突出する突部152bが形成され、断面コ字状をなしている。   Protrusions 152b projecting from both end portions of the divided body 152a that are spaced apart from each other in the axial direction are formed on the inner surface of each of the divided bodies 152a.

このように構成された複数の分割体152aが、導体引出棒120の他端部124と凸部134bとの接続部分に、両者のフランジ部126,136に跨って配置されており、両者のフランジ126,136がコ字状内に配置された状態となっている。これにより、分割体152aからなる筒状の導通筒状接続部152の軸方向への移動は規制されている。なお、複数の分割体152aからなる筒状体の内径は、接続される他端部124と凸部134bの外径よりも小さいものとなっている。   The plurality of divided bodies 152a configured as described above are disposed at the connecting portion between the other end portion 124 of the conductor lead bar 120 and the convex portion 134b so as to straddle both flange portions 126 and 136, and both flange portions 126 and 136 are arranged in a U-shape. Thereby, the movement to the axial direction of the cylindrical conduction | electrical_connection cylindrical connection part 152 which consists of the division body 152a is controlled. In addition, the internal diameter of the cylindrical body which consists of several division body 152a is a thing smaller than the outer diameter of the other end part 124 and the convex part 134b to be connected.

このように配置された導通筒状接続部152は、外周側に配置された押圧部材154によって、導体引出棒120の他端部124と凸部134bの外周面に押圧され、当該外周面と面接触している。   The conductive cylindrical connecting portion 152 arranged in this way is pressed against the outer peripheral surface of the other end portion 124 of the conductor lead bar 120 and the convex portion 134b by the pressing member 154 arranged on the outer peripheral side, and the outer peripheral surface and the surface. In contact.

押圧部材154は、導通筒状接続部152の内周面を導体引出棒120の他端部124及び凸部134bの外周面に押圧して接触させることによって、両者を導通させるとともに、両者の接続部分から導通筒状接続部152が位置ずれすることを防止している。   The pressing member 154 makes the two conductive and presses the inner peripheral surface of the conductive cylindrical connecting portion 152 against the outer peripheral surface of the other end portion 124 and the convex portion 134b of the conductor pull-out rod 120 and connects them. This prevents the conductive cylindrical connecting portion 152 from being displaced from the portion.

ここでは、押圧部材154は、導通筒状接続部152の外周に沿って複数配設された環状のコイルスプリングにより構成されている。ここでは、コイルスプリングは、導通筒状接続部152の外周面から脱落しないように、導通筒状接続部152の外周面に、外周に沿って形成された溝部152cに内嵌させた状態で配置されている。詳細には、溝部152cは、複数の分割体152aのぞれぞれの外周面の同位置に形成される。   Here, the pressing member 154 is configured by a plurality of annular coil springs arranged along the outer periphery of the conductive cylindrical connecting portion 152. Here, the coil spring is arranged in a state in which it is fitted in a groove 152c formed along the outer periphery on the outer peripheral surface of the conductive cylindrical connecting portion 152 so as not to drop off from the outer peripheral surface of the conductive cylindrical connecting portion 152. Has been. Specifically, the groove 152c is formed at the same position on the outer peripheral surface of each of the plurality of divided bodies 152a.

さらに、可撓通電部150では、同軸上に配置された導体引出棒120の他端部124と凸部134bとの外周を被覆する導通筒状接続部152及び押圧部材154を熱収縮チューブ156により被覆している。この熱収縮チューブ156によって、套管110内に樹脂を充填させて絶縁筒部140を形成する際に、可撓通電部150へ樹脂が侵入することを防止できる。   Further, in the flexible energizing portion 150, the conductive cylindrical connecting portion 152 and the pressing member 154 that cover the outer periphery of the other end portion 124 and the convex portion 134b of the conductor lead bar 120 arranged on the same axis are connected by the heat shrinkable tube 156. It is covered. The heat shrinkable tube 156 can prevent the resin from entering the flexible energizing portion 150 when the sleeve 110 is filled with the resin to form the insulating cylinder portion 140.

熱収縮チューブ156の上下の開口部の内周には、導体引出棒120と凸部134bとにそれぞれ外嵌されたOリング158が配設されている。ここでは、Oリング158は熱収縮チューブ156に埋設されており、これら熱収縮チューブ156及びOリング158によって、導体引出棒120の他端部124と受容部130の凸部134bとの接続部分は密閉された状態となっている。なお、このOリング158を有しない可撓通電部150の構成としてもよい。この場合、熱収縮チューブ156によって、導体引出棒120の他端部124と受容部130の凸部134bとの接続部分は密閉される。   On the inner circumference of the upper and lower openings of the heat-shrinkable tube 156, O-rings 158 that are externally fitted to the conductor lead bar 120 and the convex portion 134b are disposed. Here, the O-ring 158 is embedded in the heat-shrinkable tube 156, and the connection portion between the other end portion 124 of the conductor lead bar 120 and the convex portion 134b of the receiving portion 130 is formed by the heat-shrinkable tube 156 and the O-ring 158. It is in a sealed state. In addition, it is good also as a structure of the flexible electricity supply part 150 which does not have this O-ring 158. In this case, the connection portion between the other end portion 124 of the conductor lead bar 120 and the convex portion 134 b of the receiving portion 130 is sealed by the heat shrinkable tube 156.

なお、可撓通電部150は、上記の構成に限らず、ポリマー套管110を用いた場合も編曲に導体引出棒120、ケーブル端末が接続された受容部130が追従できれば、どのような構成でもよい。例えば、導体引出棒120と受容部130の接続部分や導体引出棒120の途中にフレキシブル導体(可撓より線)や短尺ケーブルなどを配設したりしてもよい。   Note that the flexible energization unit 150 is not limited to the above configuration, and any configuration can be used even when the polymer sleeve 110 is used, as long as the conductor lead bar 120 and the receiving unit 130 connected to the cable end can follow the arrangement. Good. For example, a flexible conductor (flexible stranded wire), a short cable, or the like may be disposed in the connection portion between the conductor lead rod 120 and the receiving portion 130 or in the middle of the conductor lead rod 120.

このように構成された可撓通電部150によって、導体引出棒120と受容部130とは導通した状態で屈曲自在に接続されている。   By the flexible energizing portion 150 configured as described above, the conductor lead bar 120 and the receiving portion 130 are connected to each other so as to be bent in a conductive state.

このような導体引出棒120及び受容部130の外周面と、套管110の内周面との間には、套管110の外被であるポリマー被覆材114と同種の絶縁材料を充填し固化してなる絶縁筒部140が配設されている。   Between the outer peripheral surface of the conductor lead bar 120 and the receiving portion 130 and the inner peripheral surface of the cannula 110, an insulating material of the same kind as the polymer covering material 114 that is the outer cover of the cannula 110 is filled and solidified. An insulating cylinder portion 140 is provided.

絶縁筒部140は、套管110の絶縁外被部を構成するポリマー被覆材114と同様の絶縁性を有する樹脂で形成されてなり、内周面は導体引出棒120及び受容部130の外周面に密着され、外周面は套管110の内周面に密着している。   The insulating cylinder portion 140 is formed of a resin having the same insulating property as the polymer coating material 114 constituting the insulating jacket portion of the sleeve 110, and the inner peripheral surface is the outer peripheral surface of the conductor lead bar 120 and the receiving portion 130. The outer peripheral surface is in close contact with the inner peripheral surface of the cannula 110.

絶縁筒部140は、ここでは、套管110の絶縁外被部を構成するポリマー被覆材114と同じ絶縁性を有する樹脂であるシリコーンで形成している。なお、絶縁筒部140は、套管110の絶縁外被部(ポリマー被覆材114)で用いられる材料と同種の材料であれば、どのような材料でもよい。また、絶縁筒部140を形成する樹脂は、固化してなるゲル状の樹脂も含む。   Here, the insulating cylindrical portion 140 is formed of silicone, which is a resin having the same insulating property as the polymer covering material 114 that forms the insulating jacket portion of the sleeve 110. The insulating tube 140 may be made of any material as long as it is the same material as that used for the insulating jacket portion (polymer coating material 114) of the cannula 110. Further, the resin forming the insulating cylinder portion 140 includes a gelled resin formed by solidification.

具体的には、絶縁筒部140は、シリコーンゴム等の低温硬化形や常温硬化形のゴムで形成することが望ましいが、軟質エポキシ樹脂などを用いて形成してもよい。なお、低温硬化形のゴムにおける低温硬化とは、例えば90℃〜160℃程度で硬化するものである。また、常温硬化形は25℃〜50℃程度で硬化するもの、高温硬化形とは140℃〜250℃程度で硬化するものとする。   Specifically, the insulating cylindrical portion 140 is preferably formed of a low temperature curable rubber or a normal temperature curable rubber such as silicone rubber, but may be formed using a soft epoxy resin or the like. In addition, the low temperature curing in the low temperature curing type rubber is one that is cured at, for example, about 90 ° C to 160 ° C. The room temperature curing type is cured at about 25 ° C. to 50 ° C., and the high temperature curing type is cured at about 140 ° C. to 250 ° C.

このように絶縁筒部140は、ポリマー被覆材114と同様のシリコーンで形成されているため、套管110との親和性もよく強固に接合されている。例えば、絶縁筒部140が、套管110の本体部112と接着性が良いポリマー被覆材114と同様のシリコーンであるため、絶縁筒部140自体も套管110におけるFRP製の本体部112との接着性が良い。   Thus, since the insulating cylinder part 140 is formed of the same silicone as the polymer covering material 114, it has a good affinity with the sleeve 110 and is firmly bonded. For example, since the insulating cylinder part 140 is made of the same silicone as the polymer covering material 114 having good adhesiveness with the main body part 112 of the cannula 110, the insulating cylinder part 140 itself is also connected to the FRP main body part 112 of the cannula 110. Good adhesion.

気中終端接続部用套管ユニット100によれば、套管110内において、従来、油やガスを用いて行っていた内部絶縁を、ゲル状を含む固体の絶縁筒部140で行う構成としたため、内部絶縁自体が外部に流出することがないとともに、気中終端接続部用套管ユニット100自体の設置を、設置方向が限定されることなく自由に行える。   According to the cannula unit 100 for the air end connection portion, the internal insulation that has been conventionally performed using oil or gas in the cannula 110 is performed by the solid insulating cylindrical portion 140 including a gel. In addition, the internal insulation itself does not flow out to the outside, and the installation of the cannula unit 100 for the air termination connection portion can be freely performed without limiting the installation direction.

また、気中終端接続部用套管ユニット100によれば、絶縁筒部140は、工場において、導体引出棒120、可撓通電部150及び受容部130を配設した套管110内に、注型し固化して形成することができるため、ユニット状態のまま検査出荷して、現場での組み立て工程を省略でき、現場作業の工数を削減できる。   In addition, according to the cannula unit 100 for the air end connection part, the insulating cylinder part 140 is poured into the cannula 110 in which the conductor extraction rod 120, the flexible energizing part 150 and the receiving part 130 are disposed in the factory. Since it can be molded and solidified, it can be inspected and shipped in the unit state, and the on-site assembly process can be omitted, reducing the number of on-site work steps.

次に、気中終端接続部用套管ユニット100を用いた気中終端接続部200について説明する。   Next, the air end connection part 200 using the air end connection part sleeve unit 100 will be described.

図3は、本発明に係る気中終端接続部用套管ユニット100を用いた気中終端接続部200の部分断面図であり、図4は、本発明に係る気中終端接続部用套管ユニット100を用いた気中終端接続部200の接続方法を示す図である。   FIG. 3 is a partial cross-sectional view of an air end connection portion 200 using the air end connection portion cannula unit 100 according to the present invention, and FIG. 4 is an air end connection portion cannula according to the present invention. It is a figure which shows the connection method of the air termination | terminus connection part 200 using the unit 100. FIG.

図3に示す気中終端接続部用套管ユニット100は、底部金具118のフランジ部分を
支持碍子202を介して支持架台204に取り付けられており、受容口に、電力ケーブルの端末(以下、「ケーブル端末」という)310が挿入されることにより形成されている。なお、ケーブル端末310は、図3では断面図で示され、図4では側面図として示されている。
3 has a flange portion of a bottom fitting 118 attached to a support base 204 via a support insulator 202, and a power cable terminal (hereinafter, “ This is formed by inserting a cable terminal 310). In addition, the cable terminal 310 is shown by sectional drawing in FIG. 3, and is shown as a side view in FIG.

この気中終端接続部用套管ユニット100を用いた気中終端接続部200の組み立て方法としては、先ず、気中終端接続部用套管ユニット100を、底部金具118の下面に配設した支持碍子202を介して支持架台204に取り付ける(図3参照)。   As an assembling method of the air end connection portion 200 using the air end connection portion cannula unit 100, first, the air end connection portion cannula unit 100 is disposed on the lower surface of the bottom fitting 118. It attaches to the support stand 204 via the insulator 202 (refer FIG. 3).

また、電力ケーブル300のケーブルの端部を段剥処理して露出させたケーブル絶縁体312の外周に、ストレスコーン320を装着するとともに、ケーブル導体の先端部に導体端子322を取り付ける(図4参照)。   In addition, a stress cone 320 is attached to the outer periphery of the cable insulator 312 exposed by stripping the end of the cable of the power cable 300, and a conductor terminal 322 is attached to the tip of the cable conductor (see FIG. 4). ).

ストレスコーン320は、エチレンプロピレンゴム(EPゴム)等のゴム状弾性を有するプレモールド絶縁体などから成り、このストレスコーン320の先端部には受容部130の受容口の内壁面に装着される先細り状のコーン状部324が設けられている(図4参照)。   The stress cone 320 is made of a pre-mold insulator having rubber-like elasticity such as ethylene propylene rubber (EP rubber), and the tip of the stress cone 320 is tapered to be attached to the inner wall surface of the receiving port of the receiving unit 130. A cone-shaped portion 324 is provided (see FIG. 4).

そして、このような構成のケーブル端末310を受容部の受容口に装着して、ケーブル端末310側に配設した押圧装置(図示省略)を受容口側に向けて圧縮する。これにより、導体端子322が受容部130における筒内導通部134(図1参照)の接続部134a(図1参照)に内嵌して、受容部130及び可撓通電部150を介して導体引出棒120に導通した状態で接続されるとともに、ストレスコーン320のコーン状部324が受容部130の受容口の内壁面に押し付けられて、受容部の内壁面とコーン状部324の外周面間における界面の絶縁性能が確保される。   Then, the cable terminal 310 having such a configuration is attached to the receiving port of the receiving portion, and a pressing device (not shown) disposed on the cable terminal 310 side is compressed toward the receiving port side. As a result, the conductor terminal 322 is fitted into the connecting portion 134a (see FIG. 1) of the in-cylinder conductive portion 134 (see FIG. 1) in the receiving portion 130, and the conductor is drawn out via the receiving portion 130 and the flexible energizing portion 150. In addition to being connected to the rod 120 in a conductive state, the cone-shaped portion 324 of the stress cone 320 is pressed against the inner wall surface of the receiving port of the receiving portion 130, and between the inner wall surface of the receiving portion and the outer peripheral surface of the cone-shaped portion 324. Interfacial insulation performance is ensured.

本実施の形態によれば、套管110内の内部絶縁体として、固体である絶縁筒部140を有するため、気中終端接続部用套管ユニット100として工場などにおいて電気試験後に出荷でき、信頼性の向上を図ることができる。   According to the present embodiment, since the solid insulating tube portion 140 is provided as the internal insulator in the cannula 110, the cannula unit 100 for the air termination connection portion can be shipped after an electrical test at a factory or the like, It is possible to improve the performance.

また、気中終端接続部200を作製する場合、現地組み立て作業としては、ケーブル処理のみとなる。さらに、気中終端接続部用套管ユニット100の受容部130の受容口にケーブルの端末310を挿入するだけで、気中終端接続部200を組み立てることができる。つまり、従来の複合碍管適用油絶縁式の気中終端接続部の構造と異なり、ケーブル端末自体を碍管内に貫通、または深く挿入させることなく、終端接続部を組み立てることができる。よって、碍管長に関わらず、従来と比較して、電力ケーブルの端部における処理長を短くすることができる。   Moreover, when producing the air termination | terminus connection part 200, only cable processing is as field assembly work. Furthermore, the air end connection part 200 can be assembled by simply inserting the cable terminal 310 into the receiving port of the receiving part 130 of the air terminal connection part sleeve unit 100. That is, unlike the structure of the conventional composite insulator-applied oil-insulated air termination connection portion, the termination connection portion can be assembled without penetrating or deeply inserting the cable terminal itself into the insulator tube. Therefore, the processing length at the end portion of the power cable can be shortened as compared with the conventional case regardless of the length of the tub tube.

すなわち、本実施の形態の気中終端接続部用套管ユニット100は、従来の気中終端接続部に見られるように、接続される電力ケーブルの端末は、一端部側から挿入して他端部側近傍まで至る構成とは異なる。   That is, the cannula unit 100 for the air end connection part of the present embodiment is inserted into the end of the connected power cable from one end side as seen in the conventional air end connection part. It differs from the structure which reaches to the part side vicinity.

つまり、従来の気中終端接続部は、磁器碍管を用いて内部に絶縁油やSF等の絶縁ガスを充填した気中終端接続部や、磁器碍管に代えてポリマー碍管を用いて内部に絶縁油や絶縁ガスを充填した複合碍管等に見られるように、電力ケーブルは、碍管内を略貫通する構成、つまり、碍管内深くに挿入された構成となっている。 In other words, the conventional air termination connection part is insulated inside using a porcelain soot tube and an air end connection part filled with an insulating gas such as insulating oil or SF 6, or a polymer soot pipe instead of a porcelain soot pipe. As seen in a composite soot tube filled with oil or insulating gas, the power cable has a configuration that penetrates the inside of the soot tube, that is, a configuration that is inserted deep inside the soot tube.

これに対して、気中終端接続部用套管ユニット100は、套管110の一端部110a側に配設された受容部130の受容口にケーブル端末310を挿入するだけで、他端部110b側の他のケーブルや機器などに絶縁処理が施された状態で導通して接続させることができ、従来と異なり、碍管内に挿入される電力ケーブル部分に施される段剥ぎ等の端末部分の処理長が短くなっている。   On the other hand, in the cannula unit 100 for the air end connection part, the other end part 110b can be obtained by simply inserting the cable terminal 310 into the receiving port of the receiving part 130 disposed on the one end part 110a side of the cannula 110. It can be connected and connected to other cables and equipment on the side in an insulated state, unlike the conventional case, such as stripping of the terminal part applied to the power cable part inserted in the fist tube The processing length is shortened.

また、本発明の気中終端接続部用套管ユニット100は、内部絶縁体として套管110の絶縁外被部であるポリマー被覆材114と同種の材料からなる固体の絶縁筒部140を備える。このため、碍管内の上部に空層が存在し、かつ、油絶縁式の気中終端接続部と異なり、碍管を設置する際の傾きが規制されることなく、自由な方向で設置することができる。   In addition, the cannula unit 100 for an air end connection part of the present invention includes a solid insulating cylinder part 140 made of the same kind of material as the polymer covering material 114 which is an insulating jacket part of the cannula 110 as an internal insulator. For this reason, there is an empty layer in the upper part of the soot pipe, and unlike the oil-insulated air terminal connection, the tilt when installing the soot pipe is not restricted, and it can be installed in any direction. it can.

また、絶縁筒部140は、従来、用いられていた油やガスと異なり、固体化されているため、地絡時の飛散物として、絶縁筒部140自体が飛散することがなく、飛散物の噴出箇所近傍の材料の最小限に抑制できる。   Moreover, since the insulating cylinder part 140 is solidified unlike oil and gas conventionally used, the insulating cylinder part 140 itself does not scatter as a scattered object at the time of a ground fault. The material in the vicinity of the spout can be minimized.

また、套管110がシリコーン製のポリマー被覆材114で被覆されたポリマー套管110であり、且つ、この套管110内部に絶縁油又は絶縁ガスなどを用いず固体の絶縁筒部140が設けられている。このため、従来の磁器製のものと異なり、高電圧(例えば、154kV)の電力ケーブルであっても、太く長尺となることがなく、重量も重くなることがない。また、高電圧ケーブルの気中終端接続部を組み立てる際にも、絶縁油又は絶縁ガスを現場で充填する作業を必要としない。このため、気中終端接続部用套管ユニットは扱いやすくなり、気中終端接続部を組み立てる際の作業効率の向上を図ることができる。   Further, the cannula 110 is a polymer cannula 110 covered with a polymer covering material 114 made of silicone, and a solid insulating cylinder part 140 is provided inside the cannula 110 without using insulating oil or insulating gas. ing. For this reason, unlike a conventional porcelain product, even a high-voltage (for example, 154 kV) power cable does not become thick and long and does not become heavy. Further, when assembling the aerial terminal connection portion of the high voltage cable, the work of filling the insulating oil or the insulating gas on site is not required. For this reason, the cannula unit for the air end connection part is easy to handle, and the work efficiency when the air end connection part is assembled can be improved.

また、導体引出棒120は、筒状であるため、中実の導体引出棒と比較して、軽量化を図ることができる。また、接続するケーブル導体より断面積を大きくした状態で、外径を大きくできる。これにより、導体引出棒120自体の導体表面ストレスを緩和させることができる。套管110内において絶縁筒部140を構成するシリコーンなどの材料の量を少なくさせることができる。   Moreover, since the conductor lead-out rod 120 has a cylindrical shape, the weight can be reduced as compared with a solid conductor lead-out rod. Further, the outer diameter can be increased in a state where the cross-sectional area is larger than the cable conductor to be connected. Thereby, the conductor surface stress of the conductor extraction rod 120 itself can be relieved. The amount of a material such as silicone constituting the insulating cylinder portion 140 in the sleeve 110 can be reduced.

また、本実施の形態の気中終端接続部用套管ユニット100では、ポリマーを用いた套管110内の導体引出棒と受容部130とを可撓通電部150により導通した状態で接続している。このため、横荷重を受けた場合に大きく変形するポリマー製の套管110及び絶縁筒部140の変形に追従でき、導体引出棒120、受容部130等に曲げ力が伝達されることを防止できる。   Further, in the cannula unit 100 for the air end connection part of the present embodiment, the conductor lead-out rod and the receiving part 130 in the cannula 110 using the polymer are connected in a conductive state by the flexible energizing part 150. Yes. For this reason, it is possible to follow the deformation of the polymer cannula 110 and the insulating cylindrical portion 140 that are greatly deformed when subjected to a lateral load, and it is possible to prevent the bending force from being transmitted to the conductor lead bar 120, the receiving portion 130, and the like. .

なお、気中終端接続部は、塩が付着し易い海岸付近、埃が多い地域等に配設された場合の現地の汚損環境に対応した套管の長さを必要とすることが知られている。この点において、本実施の形態の気中終端接続部用套管ユニット100は、套管110内に樹脂を注入して固化させることで絶縁筒部140を形成するだけで形成できるため、その配設を行い易い。   In addition, it is known that the aerial termination connection portion needs a length of a cannula corresponding to the local fouling environment when it is disposed near the coast where salt easily adheres or in a dusty area. Yes. In this respect, the cannula unit 100 for the air end connection part of the present embodiment can be formed simply by forming the insulating cylinder part 140 by injecting resin into the cannula 110 and solidifying it. Easy to set up.

本発明の第1の態様に係る気中終端接続部用套管ユニットは、筒状をなし、一端部側から電力ケーブル端末が挿入されるとともに、外周面が、襞部を有する樹脂製の絶縁外被部で被覆されたポリマー套管と、前記ポリマー套管内に当該ポリマー套管と同心上に配置され、前記一端部側から挿入される前記電力ケーブル端末に導通される導体引出棒と、前記ポリマー套管内に配置され、前記一端部側から挿入される前記電力ケーブル端末を受容して前記導体引出棒と接続する受容部と、前記導体引出棒及び受容部の周囲を被覆する筒状をなし、外周面で前記ポリマー套管に被覆される絶縁筒部と有し、前記絶縁筒部は、前記絶縁外被部と同種の樹脂により形成されてなる構成を採る。   The cannula unit for an air end connection part according to the first aspect of the present invention has a tubular shape, a power cable terminal is inserted from one end side, and an outer peripheral surface is made of resin insulation having a flange part A polymer cannula covered with a jacket part, a conductor lead bar arranged concentrically with the polymer cannula in the polymer cannula and connected to the power cable terminal inserted from the one end side; and A receiving portion that is disposed in the polymer sleeve and receives the power cable terminal inserted from the one end side and connects to the conductor drawing rod, and a cylindrical shape that covers the conductor drawing rod and the receiving portion. And an insulating cylinder part covered with the polymer sleeve on the outer peripheral surface, and the insulating cylinder part is formed of the same kind of resin as the insulating jacket part.

この構成によれば、套管がポリマー套管であり、従来の磁器製のものと異なり、高電圧の電力ケーブルであっても、太く長尺となることがなく、重量も重くなることがない。よって、高電圧ケーブルの気中終端接続部を組み立てる際にも、扱いやすく作業効率の向上を図ることができる。   According to this configuration, the cannula is a polymer cannula, and unlike a conventional porcelain one, even a high-voltage power cable does not become thick and long and does not increase in weight. . Therefore, when assembling the air terminal connection part of the high voltage cable, it is easy to handle and the work efficiency can be improved.

また、ポリマー套管内の内部絶縁体として、ポリマー套管で用いられる絶縁外被部と同様の樹脂により形成されてなる絶縁筒部を有するため、碍管内に充填される絶縁油又は絶縁ガス等を絶縁コンパウンドとして用いた従来の気中終端接続部と異なり、地震などの外的な負荷や経年によって絶縁コンパウンドの外部への流出防止のためのメンテナンスを必要としない。さらに、套管内に、ポリマー製の套管内に外部から水分が透過して、套管内の絶縁油や絶縁ガス等が混入することがない。   In addition, as an inner insulator in the polymer sleeve, it has an insulating cylinder portion formed of the same resin as the insulating jacket portion used in the polymer sleeve, so that insulating oil or insulating gas filled in the soot tube can be used. Unlike conventional aerial termination connections used as insulation compounds, maintenance is not required to prevent the insulation compounds from flowing out due to external loads such as earthquakes and aging. Further, moisture does not permeate from the outside into the cannula made of polymer, and insulating oil or insulating gas in the cannula is not mixed in the cannula.

したがって、扱い易く、絶縁処理を確実に施された気中終端接続部を好適に組み立てることができる。   Therefore, it is easy to handle, and the aerial terminal connection portion that has been reliably subjected to insulation treatment can be suitably assembled.

本発明の第2の態様に係る気中終端接続部用套管ユニットは、上記構成において、前記ポリマー套管内の前記導体引出棒と前記受容部とは可撓性を有する接続部により互いを導通した状態で接続されている構成を採る。   In the above structure, the cannula unit for the air termination connecting part according to the second aspect of the present invention is configured such that the conductor lead bar and the receiving part in the polymer cannula are electrically connected to each other by a flexible connecting part. The connected structure is adopted.

この構成によれば、外部から荷重がかかる場合でも、導体引出棒とケーブル導体が接続される受容部に、曲げ荷重がかかることを防止して、その接続状態を好適に維持することができる。   According to this configuration, even when a load is applied from the outside, it is possible to prevent a bending load from being applied to the receiving portion to which the conductor lead bar and the cable conductor are connected, and to suitably maintain the connection state.

本発明の第3の態様に係る気中終端接続部用套管ユニットは、上記構成において、前記受容部は、前記ポリマー套管の一端部側に配置されている構成を採る。   In the above configuration, the cannula unit for an air end connection portion according to the third aspect of the present invention employs a configuration in which the receiving portion is disposed on one end side of the polymer cannula.

この構成によれば、套管内を貫通するように電力ケーブルを挿入する必要がないため、電力ケーブル端末において、気中終端接続部として気中終端接続部用套管ユニットに接続する際に必要な套管内に挿入される部位におけるケーブル絶縁体に対して行う段剥ぎ等の処理長を短くすることができる。   According to this configuration, since it is not necessary to insert the power cable so as to penetrate through the cannula, the power cable terminal is necessary when connecting to the aerial termination connection portion cannula unit as the aerial termination connection portion. It is possible to shorten the processing length such as stripping performed on the cable insulator in the portion inserted into the cannula.

本発明の第4の態様に係る気中終端接続部用套管ユニットは、上記構成において、前記導体引出棒は筒状である構成を採る。   The cannula unit for an air end connection portion according to the fourth aspect of the present invention employs a configuration in which the conductor lead bar is cylindrical in the above configuration.

この構成によれば、ポリマー套管内の導体引出棒が筒状であるため、接続されるケーブルのケーブル導体の断面より大きな断面を有した状態で、導体引出棒の外径を大きくすることができる。   According to this configuration, since the conductor lead bar in the polymer sleeve is cylindrical, the outer diameter of the conductor lead bar can be increased in a state having a cross section larger than the cross section of the cable conductor of the cable to be connected. .

これにより、絶縁筒部に被覆されることで面接触する導体引出棒の外周面積を広くすることができ、導体引出棒自体の表面における電界ストレスを緩和することができる。また、ポリマー套管内で導体引出棒の径が大きくなることから、導体引出棒とポリマー套管の間の空間に設けられる絶縁筒部の体積を減少させることができる。つまり、絶縁筒部を形成する樹脂の量を低減することできる。さらに、中実の導体引出棒と比較して、中空部分を有することで、その分の軽量化を図ることができる。   Thereby, the outer peripheral area of the conductor lead bar which is in surface contact by being covered with the insulating cylinder part can be widened, and the electric field stress on the surface of the conductor lead bar itself can be reduced. Further, since the diameter of the conductor lead bar is increased in the polymer sleeve, the volume of the insulating cylinder portion provided in the space between the conductor lead bar and the polymer sleeve can be reduced. That is, the amount of resin forming the insulating cylinder portion can be reduced. Furthermore, compared with a solid conductor extraction rod, by having a hollow portion, it is possible to reduce the weight.

本発明の第5の態様に係る気中終端接続部は、上記構成の気中終端接続部用套管ユニットの前記受容部に、電力ケーブル端末が装着されてなる構成を採る。   The aerial termination connection portion according to the fifth aspect of the present invention has a configuration in which a power cable terminal is attached to the receiving portion of the cannula unit for the aerial termination connection portion having the above-described configuration.

この構成によれば、套管がポリマー套管であり、従来の磁器製のものと異なり、高電圧の電力ケーブルであっても、太く長尺となることがなく、重量も重くなることがない。よって、高電圧ケーブルの気中終端接続部を組み立てる際にも、扱いやすく作業効率の工場を図ることができる。また、ポリマー套管内の内部絶縁体として、ポリマー套管で用いられる絶縁外被部と同様の樹脂により形成されてなる絶縁筒部を有するため、碍管内に充填される絶縁油又は絶縁ガス等を絶縁コンパウンドとして用いた従来の気中終端接続部と異なり、地震などの外的な負荷や経年によって絶縁コンパウンドの外部への流出防止のためのメンテナンスを必要としない。さらに、套管内に、ポリマー製の套管内に外部から水分が透過して、套管内の絶縁油や絶縁ガス等が混入することがない。   According to this configuration, the cannula is a polymer cannula, and unlike a conventional porcelain one, even a high-voltage power cable does not become thick and long and does not increase in weight. . Therefore, when assembling the aerial terminal connection portion of the high-voltage cable, it is easy to handle and a factory with work efficiency can be achieved. In addition, as an inner insulator in the polymer sleeve, it has an insulating cylinder portion formed of the same resin as the insulating jacket portion used in the polymer sleeve, so that insulating oil or insulating gas filled in the soot tube can be used. Unlike conventional aerial termination connections used as insulation compounds, maintenance is not required to prevent the insulation compounds from flowing out due to external loads such as earthquakes and aging. Further, moisture does not permeate from the outside into the cannula made of polymer, and insulating oil or insulating gas in the cannula is not mixed in the cannula.

したがって、扱い易く、絶縁処理を確実に施した状態で好適に組み立てることができる。   Therefore, it is easy to handle and can be suitably assembled in a state in which insulation treatment is reliably performed.

本発明に係る気中終端接続部用套管ユニット及び気中終端接続部は上記各実施の形態に限定されず、種々変更して実施することが可能である。   The cannula unit for the aerial terminal connection part and the aerial terminal connection part according to the present invention are not limited to the above-described embodiments, and various modifications can be made.

本発明に係る気中終端接続部用套管ユニット及び気中終端接続部は、高電圧の電力ケーブルの気中終端接続部に用いて、扱い易く、好適に気中終端接続部を組み立てることができる効果を有し、高電圧の電力ケーブルの気中終端接続部に用いられるものとして有用である。   The cannula unit for air termination connection and the air termination connection according to the present invention are easy to handle and can be suitably assembled to the air termination connection of a high-voltage power cable. It is useful as a device that can be used for an air termination connection portion of a high-voltage power cable.

本発明の一実施の形態に係る気中終端接続部用套管ユニットの構成を示す断面図Sectional drawing which shows the structure of the cannula unit for air termination | terminus connection parts which concerns on one embodiment of this invention 本発明の一実施の形態に係る気中終端接続部用套管ユニットにおける可撓通電部の一例を示す模式図The schematic diagram which shows an example of the flexible electricity supply part in the cannula unit for the air termination | terminus connection parts which concern on one embodiment of this invention. 本発明に係る気中終端接続部用套管ユニットを用いた気中終端接続部の部分断面図The fragmentary sectional view of the aerial termination connection part using the cannula unit for the aerial termination connection part concerning the present invention 本発明に係る気中終端接続部用套管ユニットを用いた気中終端接続部の接続方法を示す図The figure which shows the connection method of the air termination | terminus connection part using the cannula unit for air termination | terminus connection parts which concerns on this invention

符号の説明Explanation of symbols

100 気中終端接続部用套管ユニット
110 套管(ポリマー套管)
112 本体部
114 ポリマー被覆材(絶縁外被部)
120 導体引出棒
122 導体引出棒の一端部
124 導体引出棒の他端部
130 受容部
132 受容部本体
134 筒内導通部
140 絶縁筒部
150 可撓通電部
200 気中終端接続部
300 電力ケーブル
310 電力ケーブル端末
110a 套管の基端部
114a 襞部
118a 開口部
134a 接続部
134b 凸部
152a 分割体
100 Cannula Unit for End Terminal Connection in Air 110 Cannula (polymer cannula)
112 Body 114 Polymer coating (insulation jacket)
DESCRIPTION OF SYMBOLS 120 Conductor extraction rod 122 One end part of a conductor extraction rod 124 Other end part of a conductor extraction rod 130 Receiving part 132 Receiving part main body 134 In-cylinder conduction part 140 Insulating cylinder part 150 Flexible energizing part 200 In-air terminal connection part 300 Power cable 310 Power cable terminal 110a Base end portion of cannula 114a collar portion 118a opening portion 134a connection portion 134b convex portion 152a divided body

Claims (3)

筒状をなし、一端部側から電力ケーブル端末が挿入されるとともに、外周面を、襞部を有する樹脂製の絶縁外被部で被覆されたポリマー套管と、
前記ポリマー套管内に当該ポリマー套管と同心上に配置され、前記一端部側から挿入される前記電力ケーブル端末に導通される導体引出棒と、
前記ポリマー套管内の前記一端部側に配置され、前記一端部側から挿入される前記電力ケーブル端末を受容して前記導体引出棒と接続する受容部と、
前記導体引出棒及び受容部の周囲を被覆する筒状をなし、外周面で前記ポリマー套管に被覆される絶縁筒部とを備え、
前記ポリマー套管は、エポキシ樹脂又はFRPからなる筒状の本体部と、前記本体部の外周部分に、長手方向に配置された複数の襞部を有するシリコン樹脂からなる絶縁外被部とを有し、
前記受容部は、エポキシ樹脂からなる筒状の受容部本体と、前記受容部本体内に配置された有底筒状の筒内導通部とを有し、
前記受容部本体は、前記一端部側の開口で受容口を形成し、前記受容口を介して、前記一端部側から前記電力ケーブル端末の端部が挿入され、挿入された前記電力ケーブル端末の端部は、前記筒内導通部に電気的に接続させることによって前記導体引出棒と導通し、
前記絶縁筒部は、前記導体引出棒及び前記受容部の外周面と、前記ポリマー套管の内周面との間に、前記絶縁外被部と同種のシリコン樹脂により形成されてなり、
前記受容部に、前記電力ケーブル端末を装着した場合、前記電力ケーブル端末及び前記電力ケーブル端末の端部と前記絶縁筒部とは、前記受容部を介することで直接接しない、気中終端接続部用套管ユニット。
A cylindrical tube, a power cable terminal is inserted from one end side, and an outer peripheral surface is coated with a resin insulating jacket portion having a flange portion, and a polymer sleeve,
A conductor lead bar disposed concentrically with the polymer sleeve within the polymer sleeve and connected to the power cable end inserted from the one end side;
A receiving portion disposed on the one end side in the polymer sleeve and receiving the power cable terminal inserted from the one end side to connect to the conductor lead bar;
It has a cylindrical shape covering the periphery of the conductor lead bar and the receiving portion, and includes an insulating cylindrical portion that is covered with the polymer sleeve on the outer peripheral surface,
The polymer sleeve has a cylindrical main body portion made of epoxy resin or FRP, and an insulating jacket portion made of silicon resin having a plurality of flange portions arranged in the longitudinal direction on the outer peripheral portion of the main body portion. And
The receiving part has a cylindrical receiving part body made of epoxy resin, and a bottomed cylindrical in-cylinder conducting part arranged in the receiving part body,
The receiving portion main body forms a receiving port with the opening on the one end side, and an end of the power cable terminal is inserted from the one end side through the receiving port, and the inserted power cable terminal The end portion is electrically connected to the conductor lead bar by being electrically connected to the in-cylinder conductive portion,
The insulation tube section, and the outer peripheral surface of the conductor pull-out and the receiving part, between the inner circumferential surface of the polymer bushing, Ri Na is formed by the insulating jacket section and the same type of silicone resin,
When the power cable terminal is attached to the receiving portion, the end portion of the power cable terminal and the power cable terminal and the insulating tube portion are not in direct contact with each other via the receiving portion, an air termination connection portion Sleeve unit.
前記絶縁筒部のシリコン樹脂は、固化してなるゲル状の樹脂である請求項1記載の気中終端接続部用套管ユニット。   2. The cannula unit for an air end connection part according to claim 1, wherein the silicon resin of the insulating cylinder part is a solidified gel resin. 同軸上に配置された前記導体引出棒の端部と前記受容部の接続部との外周を導通筒状接続部で被覆して、もしくは、前記導体引出棒と前記受容部の接続部分や前記導体引出棒の途中に、フレキシブル導体(可撓より線)や短尺ケーブルを配設して、前記ポリマー套管内の前記導体引出棒と前記受容部とを、該ポリマー套管の編曲に追従した状態で通電させる可撓通電部を備える請求項1記載の気中終端接続部用套管ユニット。 The outer periphery of the end portion of the conductor lead bar and the connection portion of the receiving portion arranged on the same axis is covered with a conductive cylindrical connection portion, or the connection portion of the conductor lead bar and the receiving portion or the conductor A flexible conductor (flexible stranded wire) or a short cable is arranged in the middle of the extraction rod, and the conductor extraction rod and the receiving portion in the polymer sleeve are in a state of following the bending of the polymer sleeve. The cannula unit for an air end connection part according to claim 1, further comprising a flexible energization part for energizing.
JP2006346589A 2006-09-04 2006-12-22 Cannula unit for end-of-air connection Active JP4637085B2 (en)

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JP5804684B2 (en) * 2009-10-09 2015-11-04 株式会社ビスキャス Assembly method of electrical cable end connection
KR102291419B1 (en) * 2015-01-23 2021-08-18 엘에스전선 주식회사 Termination connection box
JP6700603B2 (en) * 2016-09-02 2020-05-27 住友電気工業株式会社 Power cable termination connection and power cable line
CN108063025B (en) * 2017-12-11 2019-04-30 江西省萍乡市南坑高压电瓷厂 A kind of assembly type insulator and its assemble method
CN116449083B (en) * 2023-06-20 2023-12-26 威海鹏飞自动化技术有限公司 Overhead line voltage measuring device

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JPH0680338U (en) * 1993-04-16 1994-11-08 古河電気工業株式会社 Power cable termination
JPH11203970A (en) * 1998-01-19 1999-07-30 Furukawa Electric Co Ltd:The Polymer insulation tube and power cable terminal connection portion
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JPH11203970A (en) * 1998-01-19 1999-07-30 Furukawa Electric Co Ltd:The Polymer insulation tube and power cable terminal connection portion
JP2003304632A (en) * 2002-04-08 2003-10-24 Showa Electric Wire & Cable Co Ltd Polymer bushing and cable terminal connecting part using the bushing
JP2008509641A (en) * 2004-08-06 2008-03-27 ズユートカベル・ゲー・エム・ベー・ハー Air termination box

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