CN101752816A - Dead-end clamp for supporting expanded diameter conductors - Google Patents

Dead-end clamp for supporting expanded diameter conductors Download PDF

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Publication number
CN101752816A
CN101752816A CN 200910243404 CN200910243404A CN101752816A CN 101752816 A CN101752816 A CN 101752816A CN 200910243404 CN200910243404 CN 200910243404 CN 200910243404 A CN200910243404 A CN 200910243404A CN 101752816 A CN101752816 A CN 101752816A
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China
Prior art keywords
pipe
strain insulator
strain
steel
clamp
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CN 200910243404
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CN101752816B (en
Inventor
万建成
刘臻
牛海军
李军辉
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
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China Electric Power Research Institute Co Ltd CEPRI
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Publication of CN101752816A publication Critical patent/CN101752816A/en
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Abstract

The invention provides a dead-end clamp for connecting supporting expanded diameter conductors on poles and towers of an airy route for power transmission and a converting station, comprising a dead-end aluminum tube 8, a dead-end steel anchor 7, an aluminum liner tube 6 and a jumper conductor clamper 9, wherein the aluminum liner tube 6 is used for replacing one part of a high-density polyethylene support layer 3 of a supporting expanded diameter conductor 1, and the dead-end aluminum tube 8 is crimped on an outer-layer aluminum wire 5 and the aluminum liner tube 6. The dead-end clamp is suitable for the supporting expanded diameter conductors and stable and effective gripping supporting conductors and has simple structure and stable and reliable construction process.

Description

A kind of supporting expanded diameter conductor strain clamp
Technical field
The invention belongs to electric power system gold utensil field, be specifically related to connect on the shaft tower of a kind of aerial power transmission line and transformer station the strain clamp of supporting expanded diameter conductor.
Background technology
Conductor strain clamp is that lead is connected gold utensil on the strain insulator string, except bearing the whole pulling force of lead, also as the electric conductor conduction current, is the important gold utensil in the transmission line.The ultra high voltage engineering is a target to build " environmentally friendly " engineering, optimizes the design of engineering comprehensively, and strict guarantee electric field, magnetic field, audible noise and radio interference level satisfy standard-required.For this reason,, certainly will to strengthen conductor cross-section and increase the division radical of lead, certainly will increase the physical dimension of use amount, iron tower of lead and bus and circuit width of corridor etc. like this, thereby strengthen construction investment if plain conductor is adopted in design.If under the prerequisite that satisfies transmission line capability and line project requirement, a kind of new structure lead that guarantees the power transmission conductor current capacity is adopted in design, and with enlarged-diameter and make its any surface finish slyness as far as possible, will save conductor material greatly like this, and make the external diameter and surperficial transmission of electricity and the corona requirement that can both satisfy circuit of lead, thereby significantly reduced the total weight and the lead division radical of lead, reduced iron tower load and construction weight, thereby significantly reduced track investment.For this reason, expanded conductor has been adopted in design, in the hope of optimizing iron tower and line design, reduces construction investment.Expanded conductor needs a kind of strain clamp of special construction to cooperate with it as a kind of lead of new structure, and stabilizing effective gripping is connected supporting expanded diameter conductor on the strain insulator string.
The high density polyethylene (HDPE) supporting expanded diameter conductor is the neoteric a kind of version lead of China, as shown in Figure 1, this supporting expanded diameter conductor comprises steel core 2, the steel core outside is enclosed with high density polyethylene (HDPE) supporting layer 3 successively, internal layer aluminum steel 4 and outer aluminum steel 5, if adopt traditional this lead of strain clamp clamping, the strain insulator aluminum pipe can directly be crimped onto on the lead, because high density polyethylene (HDPE) supporting layer 3 can not directly be crimped onto in the metal usually, even also can not get good stable curable grip in the metal steel core 2 so high density polyethylene (HDPE) supporting layer 3 directly is crimped onto, but also can have serious potential safety hazard.For this reason, the present invention proposes a kind of new technical solution and come clamping high density polyethylene (HDPE) supporting expanded diameter conductor.
Summary of the invention
In order to overcome the defective of prior art, the object of the present invention is to provide a kind of safe and reliable strain clamp that is used for supporting expanded diameter conductor.
For this reason, the present invention proposes a kind of supporting expanded diameter conductor strain clamp, comprise strain insulator aluminum pipe, strain insulator steel anchor, aluminium bushing pipe and drainage wire clamp, it is characterized in that:
Described strain insulator aluminum pipe 8 is the structure of welding drainage plate on the extruded aluminum tube; Strain insulator steel anchor one end has draw ring, and the other end is used to grip the steel core of supporting expanded diameter conductor for the steel pipe shape; Described drainage wire clamp is for by making the aluminum pipe extrusion process, and the drainage thread cramping is received on the strain insulator wire jumper and is used for delivered current; Grip the steel core part of supporting expanded diameter conductor after the steel pipe crimping of strain insulator steel anchor, the draw ring of strain insulator steel anchor is series-connected on the iron tower of transmission line by gold utensil; An end grips supporting expanded diameter conductor and aluminium bushing pipe after the crimping of strain insulator aluminum pipe, and the other end grips the connecting portion of the tab front part of strain insulator steel anchor; Described aluminium bushing pipe replaces the high density polyethylene (HDPE) supporting layer of a part of length of supporting expanded diameter conductor, and the strain insulator aluminum pipe is crimped on outer aluminum steel and the aluminium bushing pipe;
The drainage wire clamp is connected with drainage plate on the strain insulator aluminum pipe by the bolt group and is used for the conducting of electric current; The steel pipe end of strain insulator aluminum pipe, aluminium bushing pipe and strain insulator steel anchor gripped supporting expanded diameter conductor after crimping was finished, and the weight load of supporting expanded diameter conductor is delivered on the draw ring of strain insulator steel anchor, the draw ring of strain insulator steel anchor is connected to the transmission of finishing weight load on the iron tower by gold utensil again;
The circulation path of electric current is on the supporting expanded diameter conductor: the drainage plate on lead aluminum steel, strain insulator aluminum pipe, the strain insulator aluminum pipe, drainage wire clamp and strain insulator wire jumper.
Wherein, described aluminium bushing pipe only grips the steel core of lead in the strain insulator aluminum pipe, and the length of described aluminium bushing pipe is 6.5-7 times of described lead overall diameter.
Wherein, described aluminium bushing pipe grips the steel core of lead and the steel pipe of strain insulator steel anchor simultaneously in the strain insulator aluminum pipe.
Wherein, the thickness of described aluminium bushing pipe equals the thickness of high density polyethylene (HDPE) supporting layer.
Wherein, described aluminium bushing pipe is integrally formed pipe or two pipes that the semicircle pipe is spliced.
Wherein, adopt the two-sided design that electrically contacts between described drainage plate and the drainage wire clamp, the drainage plate of described strain insulator aluminum pipe is the bifurcation structure of trestling, and the two-sided of described drainage wire clamp can both contact with described drainage plate.
Wherein, described strain insulator steel anchor comprises draw ring and connecting portion, is provided with steel pipe at the front end of connecting portion, and steel pipe is used to grip the steel core of supporting expanded diameter conductor.
Wherein, the draw ring of described strain insulator steel anchor and the transition portion between the connecting portion have oblique shoulder.
Wherein, be distributed with the annular groove that closely compresses with strain insulator aluminum pipe inwall on the periphery of described connecting portion.
Beneficial effect of the present invention is: adopt ripe fluid pressure type strain clamp, and the compression joint technique maturation, crimp quality is protected easily.The aluminium bushing pipe identical with the high density polyethylene (HDPE) supporting layer with inside/outside diameter size substitutes high-density polyethylene layer, and the assurance strain clamp is effective, stable to the lead gripping.
In addition, strain clamp of the present invention adopts the aluminium bushing pipe to replace the high density polyethylene (HDPE) supporting layer, the strain insulator aluminum pipe is crimped on the lead outside of having replaced supporting layer with the aluminium bushing pipe, the strain insulator steel anchor and the strain insulator aluminum pipe of crimping transmit tension force jointly, the strain insulator aluminum pipe of crimping transmits electrical load to two plate drainage plates, drainage wire clamp, be delivered on the wire jumper by the drainage wire clamp again, realize that finally strain clamp is the purpose of electric conductor conduction current.
Description of drawings
In order to make content of the present invention by clearer understanding, and be convenient to the description of embodiment, it is as follows to provide description of drawings related to the present invention below:
Fig. 1 is the cross-sectional view of supporting expanded diameter conductor;
Fig. 2 is the overall structure schematic diagram before supporting expanded diameter conductor of the present invention is used the strain clamp crimping;
Fig. 3 is the structural representation of strain insulator steel anchor;
Fig. 4 is the structural representation of strain insulator aluminum pipe, and wherein Fig. 4 a is the front view (part is analysed and observe) of strain insulator aluminum pipe, and Fig. 4 b is the right view of strain insulator spool, and Fig. 4 c is the vertical view of strain insulator spool;
Fig. 5 is the structural representation of aluminium bushing pipe, and wherein Fig. 5 a is the front view of aluminium bushing pipe, and Fig. 5 b is the right view of aluminium bushing pipe;
Fig. 6 is the structural representation of drainage wire clamp;
Fig. 7 is the overall structure schematic diagram after supporting expanded diameter conductor of the present invention is used the strain clamp crimping;
Fig. 8 is the A-A cutaway view of Fig. 7;
Wherein, 1-lead, 2-steel core, 3-supporting layer, 4-internal layer aluminum steel, the outer aluminum steel of 5-, 6-aluminium bushing pipe, 7-strain insulator steel anchor, the 71-draw ring, the 72-connecting portion, the 73-steel pipe, 74--tiltedly takes on, the 75-annular groove, 8-strain insulator aluminum pipe, 9-drainage wire clamp, 10-strain insulator wire jumper, 11-drainage plate.
Embodiment
Be further described in detail below in conjunction with the technical scheme of accompanying drawing strain clamp of the present invention.
As shown in Figure 2, the strain clamp that is used for supporting expanded diameter conductor in this example, mainly comprise strain insulator steel anchor 7, strain insulator aluminum pipe 8, drainage wire clamp 9 and aluminium bushing pipe 6, the top employing connecting bolt of described drainage wire clamp 9 is connected with the drainage plate 11 on the strain insulator aluminum pipe 8, its underpart is crimped with a strain insulator wire jumper and is used for delivered current, described strain insulator steel anchor 7 is connected the rear end of strain insulator aluminum pipe 8, supporting expanded diameter conductor 1 stretches into wherein and the supporting layer 3 that is arranged in that section lead 1 of strain insulator aluminum pipe is replaced by aluminium bushing pipe 6 from the front end of strain insulator aluminum pipe 8, better to compress effect in order reaching, to make the thickness of aluminium bushing pipe 6 identical with supporting layer 3 thickness of lead 1.
As shown in Figure 3, strain insulator steel anchor 7 comprises draw ring 71 and connecting portion 72, front end at connecting portion 72 is provided with steel pipe 73, steel pipe 73 is used to grip the steel core 2 of supporting expanded diameter conductor 1, transition portion between draw ring 71 and the connecting portion 72 is provided with oblique shoulder 74, is distributed with the annular groove 75 that closely compresses with strain insulator aluminum pipe 8 inwalls on cylindrical and its anterior periphery of described connecting portion 72.
As shown in Figure 4, strain insulator aluminum pipe 8 is an extruded aluminum tube, and its rear portion is one-body molded or be welded with a drainage plate 11, and this drainage plate 11 adopts the bifurcation structure of trestling.
As shown in Figure 5, the structure of aluminium bushing pipe 6 can be the pipe of global formation, also can be the pipe that is spliced by two semicircle pipes.In order to make strain clamp reach best crimping effect, the thickness of aluminium bushing pipe 6 equals the thickness of high density polyethylene (HDPE) supporting layer 3.The setting of aluminium bushing pipe 6 is the supporting layers 3 that are crimped in that section lead 1 in order to replace, make that whole strain clamp is crimped after, aluminium bushing pipe 6 directly is crimped onto steel core 2 skins.The position of the bushing pipe of aluminium shown in Fig. 5 is arranged in the internal layer aluminum steel 4 of lead, be used for substituting the supporting layer of certain-length, i.e. the steel core 2 of 6 grippings of the aluminium bushing pipe of this kind structure supporting expanded diameter conductor and the length of aluminium bushing pipe 6 are set to the 6.5-7 of lead 1 overall diameter doubly for best; Also the part of aluminium bushing pipe can be arranged on and be used for substituting steel pipe 73 outsides that a section supporting layer, another part are socketed in strain insulator steel anchor in the internal layer aluminum steel 4 of lead, the aluminium bushing pipe 6 that is this kind structure grips the steel core 2 of supporting expanded diameter conductor 1 and the steel pipe 73 of strain insulator steel anchor 7 simultaneously, and the length that the length of the aluminium bushing pipe 6 of this structure is set to steel pipe 73 adds the 6.5-7 of upper conductor 1 overall diameter doubly for best.
As shown in Figure 6, the top of drainage wire clamp 9 is connected with drainage plate 11 on the strain insulator aluminum pipe by bolt and is used for the conducting of electric current, the bottom of drainage wire clamp 9 is crimped with a strain insulator wire jumper that is used for delivered current, the two-sided of drainage wire clamp 9 electrically contact design because employing is two-sided between drainage wire clamp 9 and the drainage plate 11, so all can contact with drainage plate 11.
The circulation path of electric current is on the supporting expanded diameter conductor: the drainage plate 11 on lead 1, strain insulator aluminum pipe 8, the strain insulator aluminum pipe, drainage wire clamp 9 and strain insulator wire jumper 10.
As Fig. 7, shown in Figure 8, strain clamp of the present invention is when being connected with supporting expanded diameter conductor, at first divest the outer aluminum steel 5 of certain-length on this lead 1, internal layer aluminum steel 4 and supporting layer 3, make the steel core 2 at lead center expose certain-length, the supporting layer 3 of certain-length being divested the back replaces with aluminium bushing pipe 6 again, then supporting expanded diameter conductor 1 is extend into wherein and is connected with the steel pipe 73 of strain insulator steel anchor 7 from the front end of strain insulator aluminum pipe 8, the strain insulator steel anchor 7 that is connected with lead is connected with strain insulator aluminum pipe 8 by connecting portion 72, annular groove 75 closely compresses with the inwall of strain insulator aluminum pipe 8, make that section lead that substitutes supporting layer 3 by aluminium bushing pipe 6 be in the C of crimping position shown in figure place, by the crimping of hydraulic test (not shown), promptly finish the installation (B among Fig. 7 of strain clamp of the present invention and lead 1 at last, C is described crimping position).
Steel pipe 73 ends of strain insulator aluminum pipe 8, aluminium bushing pipe 6 and strain insulator steel anchor 7 gripped supporting expanded diameter conductor 1 after crimping was finished, and the weight load of supporting expanded diameter conductor 1 is delivered on the draw ring 71 of strain insulator steel anchor 7, the draw ring 71 of strain insulator steel anchor 7 is connected to the transmission of finishing weight load on the iron tower by gold utensil again.
The present invention is a kind of fluid pressure type strain clamp that is used for supporting expanded diameter conductor, owing to support by high density polyethylene (HDPE) between the aluminum steel layer of supporting expanded diameter conductor and the steel core layer, and the rigidity of high density polyethylene (HDPE) itself is less, and the plastic deformation along with time increase high-density polyethylene material under built on stilts condition has uncertainty, can not directly high-density polyethylene material be crimped in the gold utensil.Therefore designed a kind of scheme, the high density polyethylene (HDPE) supporting layer of excision certain-length, the aluminum pipe of external diameter substitutes and fills in using etc., the crimping strain insulator, continue aluminum pipe the time be crimped onto and fill on the aluminum pipe, to guarantee the safe, reliable of crimping.
Above by special embodiment content description the present invention, but those skilled in the art also can recognize the multiple possibility of modification and optional embodiment, for example, by combination and/or change the feature of single embodiment.Therefore, be understandable that these modification and optional embodiment will be considered as included among the present invention, only enclosed invention claims of scope of the present invention and coordinate restriction thereof.

Claims (9)

1. a supporting expanded diameter conductor strain clamp comprises strain insulator aluminum pipe 8, strain insulator steel anchor 7, aluminium bushing pipe 6 and drainage wire clamp 9, it is characterized in that:
Described strain insulator aluminum pipe 8 is the structure of welding drainage plate 11 on the extruded aluminum tube; Strain insulator steel anchor 7 one ends have draw ring, and the other end is used to grip the steel core 2 of supporting expanded diameter conductor 1 for the steel pipe shape; Described drainage wire clamp 9 is for by making the aluminum pipe extrusion process, and drainage wire clamp 9 is crimped onto on the strain insulator wire jumper 10 and is used for delivered current; Grip steel core 2 parts of supporting expanded diameter conductor 1 after steel pipe 73 crimping of strain insulator steel anchor 7, the draw ring of strain insulator steel anchor 7 is series-connected on the iron tower of transmission line by gold utensil; An end grips supporting expanded diameter conductor 1 and aluminium bushing pipe 6 after 8 crimping of strain insulator aluminum pipe, and the other end grips the connecting portion 72 of the tab front part of strain insulator steel anchor 7; Described aluminium bushing pipe 6 replaces the high density polyethylene (HDPE) supporting layer 3 of a part of length of supporting expanded diameter conductor 1, and strain insulator aluminum pipe 8 is crimped on outer aluminum steel 5 and the aluminium bushing pipe 6;
Drainage wire clamp 9 is connected with drainage plate 11 on the strain insulator aluminum pipe 8 by the bolt group and is used for the conducting of electric current; The steel pipe end of strain insulator aluminum pipe 8, aluminium bushing pipe 6 and strain insulator steel anchor 7 gripped supporting expanded diameter conductor 1 after crimping was finished, and the weight load of supporting expanded diameter conductor 1 is delivered on the draw ring of strain insulator steel anchor 7, the draw ring of strain insulator steel anchor 7 is connected to the transmission of finishing weight load on the iron tower by gold utensil again;
The circulation path of electric current is on the supporting expanded diameter conductor: the drainage plate 11 on lead aluminum steel 1, strain insulator aluminum pipe 8, the strain insulator aluminum pipe, drainage wire clamp 9 and strain insulator wire jumper 10.
2. strain clamp as claimed in claim 1 is characterized in that: described aluminium bushing pipe 6 only grips the steel core 2 of lead in strain insulator aluminum pipe 8, and the length of described aluminium bushing pipe 6 is 6.5-7 times of described lead 1 overall diameter.
3. strain clamp as claimed in claim 1 is characterized in that: described aluminium bushing pipe 6 grips the steel core 2 of lead and the steel pipe 73 of strain insulator steel anchor 7 simultaneously in strain insulator aluminum pipe 8.
4. as the arbitrary described strain clamp of claim 1-3, it is characterized in that: the thickness of described aluminium bushing pipe 6 equals the thickness of high density polyethylene (HDPE) supporting layer 3.
5. strain clamp as claimed in claim 4 is characterized in that: described aluminium bushing pipe 6 is integrally formed pipe or two pipes that the semicircle pipe is spliced.
6. strain clamp as claimed in claim 1, it is characterized in that: adopt the two-sided design that electrically contacts between described drainage plate 11 and the drainage wire clamp 9, the drainage plate 11 of described strain insulator aluminum pipe is the bifurcation structure of trestling, and the two-sided of described drainage wire clamp 9 can both contact with described drainage plate 11.
7. strain clamp as claimed in claim 1 is characterized in that: described strain insulator steel anchor 7 comprises draw ring 71 and connecting portion 72, is provided with steel pipe 73 at the front end of connecting portion 72, and steel pipe 73 is used to grip the steel core 2 of supporting expanded diameter conductor 1.
8. strain clamp as claimed in claim 7 is characterized in that: the draw ring 71 and the transition portion between the connecting portion 72 of described strain insulator steel anchor 7 have oblique shoulder 74.
9. strain clamp as claimed in claim 8 is characterized in that: be distributed with the annular groove 75 that closely compresses with strain insulator aluminum pipe 8 inwalls on the periphery of described connecting portion 72.
CN200910243404.2A 2009-12-21 2009-12-21 Dead-end clamp for supporting expanded diameter conductors Active CN101752816B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200910243404.2A CN101752816B (en) 2009-12-21 2009-12-21 Dead-end clamp for supporting expanded diameter conductors

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Application Number Priority Date Filing Date Title
CN200910243404.2A CN101752816B (en) 2009-12-21 2009-12-21 Dead-end clamp for supporting expanded diameter conductors

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CN101752816A true CN101752816A (en) 2010-06-23
CN101752816B CN101752816B (en) 2014-12-03

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102110968A (en) * 2010-12-24 2011-06-29 绍兴电力局 Clearance type strain clamp for conducting wires
CN102545121A (en) * 2012-01-05 2012-07-04 中国电力科学研究院 Method for connecting hydraulic tension resistant wire clip with lead
CN102810834A (en) * 2012-08-28 2012-12-05 扬州飞鸿电材有限公司 Strain clamp and method for processing same
CN102832570A (en) * 2012-07-18 2012-12-19 中国电力科学研究院 Clamping device for large-section expanded diameter conductors
CN103326308A (en) * 2013-07-16 2013-09-25 国家电网公司 Splicing sleeve
CN103594995A (en) * 2013-11-22 2014-02-19 国家电网公司 Strain clamp
CN115377909A (en) * 2022-08-04 2022-11-22 苗金雨 Tension-resistant wire clamp for traction wire

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2938510Y (en) * 2006-08-21 2007-08-22 李谋祥 Tension resisting clamp device for power line
CN201323419Y (en) * 2008-12-16 2009-10-07 中国电力科学研究院 Jumper conductor clamper of tube bus for overhead transmission line

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102110968A (en) * 2010-12-24 2011-06-29 绍兴电力局 Clearance type strain clamp for conducting wires
CN102545121A (en) * 2012-01-05 2012-07-04 中国电力科学研究院 Method for connecting hydraulic tension resistant wire clip with lead
CN102832570A (en) * 2012-07-18 2012-12-19 中国电力科学研究院 Clamping device for large-section expanded diameter conductors
CN102832570B (en) * 2012-07-18 2015-12-02 中国电力科学研究院 A kind of heavy in section expanded conductor fixing-line device
CN102810834A (en) * 2012-08-28 2012-12-05 扬州飞鸿电材有限公司 Strain clamp and method for processing same
CN102810834B (en) * 2012-08-28 2016-03-16 扬州飞鸿电材有限公司 A kind of processing method of strain clamp
CN103326308A (en) * 2013-07-16 2013-09-25 国家电网公司 Splicing sleeve
CN103594995A (en) * 2013-11-22 2014-02-19 国家电网公司 Strain clamp
CN115377909A (en) * 2022-08-04 2022-11-22 苗金雨 Tension-resistant wire clamp for traction wire

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