CN201877760U - Flexible jumper system for single-pole combined transposition strain tower - Google Patents

Flexible jumper system for single-pole combined transposition strain tower Download PDF

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Publication number
CN201877760U
CN201877760U CN2010206624824U CN201020662482U CN201877760U CN 201877760 U CN201877760 U CN 201877760U CN 2010206624824 U CN2010206624824 U CN 2010206624824U CN 201020662482 U CN201020662482 U CN 201020662482U CN 201877760 U CN201877760 U CN 201877760U
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CN
China
Prior art keywords
strain
clamp
wire jumper
jumper
insulator
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010206624824U
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Chinese (zh)
Inventor
唐明贵
吕金祥
魏冲
张先俊
潘少成
安巍
吴克伟
郭咏华
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Hennan Electric Power Survey and Design Institute
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Hennan Electric Power Survey and Design Institute
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Priority to CN2010206624824U priority Critical patent/CN201877760U/en
Application granted granted Critical
Publication of CN201877760U publication Critical patent/CN201877760U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a flexible jumper system for a single-pole combined transposition strain tower. The flexible jumper system is composed of a strain string and a jumper suspension string which are connected through a jumper; the strain string comprises a towing plate, an insulator and a strain clamp which are connected in sequence, a steel hanging point is arranged at the front end of the strain clamp, and the jumper is directly hung on the steel hanging point; the strain clamp is connected with a current guiding lead through a current guiding clamp; the strain clamp, the steel hanging point and the current guiding clamp are arranged in a shielding ring, and equalizing rings are arranged at two sides of the front end of the shielding ring; the jumper suspension string comprises a connecting plate and a suspension clamp arranged on the connecting plate, and the suspension angle of the suspension clamp is 0 degree to 42 degrees; the front end of the connecting plate is connected with the insulator, and the towing plate of the jumper is arranged at the front end of the insulator of the jumper.

Description

Single-column combination transposition strain tower flexible jumper system
Technical field
The utility model relates to a kind of strain tower gold utensil, specifically relates to a kind of flexible jumper system that is applied on the single-column combination transposition strain tower.
Background technology
The flexible jumper of single-column combination transposition strain tower is arranged between two king-towers, because spacing is bigger between two towers, wire jumper shelves span is 50m nearly, it is 500kV line jumpers span twice, suitable with ultra high voltage wire jumper span, so single-column combination transposition strain tower flexible jumper is different from common 500kV circuit flexible jumper.
For guaranteeing the safe distance of the terminal electrified body of wire jumper string to iron tower, require the wire jumper string to have certain inclination angle, this just requires wire jumper that the wire jumper string is had certain pulling force.Wire jumper string inclination angle is about 65 ° under calm condition as calculated, and flexible jumper changes with the different of the corner number of degrees with meteorological condition to some extent to the pulling force of wire jumper string, and the tension force of the terminal wire jumper of strain insulator-string is between 3.5~25KN.Every wire jumper tension force generally is being no more than 150N under the 500kV circuit normal condition.At wire jumper string end, an angle is arranged between the wire jumper of wire jumper suspension clamp both sides, for avoiding the excessive wire jumper that causes of this angle in the too small damage wires of wire clamp place bending radius, and the situation that corona may occur, require the wire jumper suspension clamp to have enough angles of dangling.
1. the mechanical strength of strain clamp and anti-vibration fatigue behaviour
The strain clamp drainage thread of using is not considered to bear than hightension now, just bear deadweight, wind and external force such as carry, the drainage plate of strain clamp bears pulling force and is not more than 2kN, and tension force surpasses 25kN in the actual engineering, as the method for simple employing reinforcement drainage plate, though strain clamp is reinforced, its material still is an aluminum or aluminum alloy, because the long-term vibrating fatigue on the circuit, still there is the fatigue fracture potential safety hazard in the wire clamp drainage plate.And when wire jumper is subjected to tension force, as shown in Figure 1, strain clamp main body aluminum pipe is produced bigger moment of flexure F*L, owing to be steel anchor crimping part in this place's aluminum pipe, the moment of flexure that is subjected to is all born by aluminum pipe, the easy flexural deformation of strain clamp.Because wire jumper tension force is bigger, in the long-time running process, drainage plate place connecting bolt influences water conservancy diversion easily because of line vibration becomes flexible in addition.
2. the drainage thread outlet of strain insulator-string
The commonly used strain insulator-string wire jumper of 500kV circuit adjusts line position by the drainage wire clamp and prevents that wire jumper and gold utensil from colliding, promptly adopting 30 degree device clamps away from the outlet side, walk around prolongation pull bar with the conplane outlet side of outlet direction lead, as Fig. 2, shown in Figure 3, when the wire jumper wire-wound is crossed the prolongation pull bar, for preventing that collision produces friction between wire jumper and the pull bar, adopt closely-spaced rod to support.This structure is stressed when very little at wire jumper, and applicable cases is good, but when the pulling force of wire jumper was big, wire jumper produced bigger moment of torsion to strain clamp, shown in E among the figure, causes the variation of the complexity of associated fitting thus.So this drainage scheme should not be applied in the single-column combination transposition strain tower.
3. the installation of strain insulator-string drainage thread
When wire jumper is installed and since the nominal error of unwrapping wire, tower position when changing the variation of the whole bridle wire apparatus angle that causes and backguy the factors such as normal variation of pulling force cause tension imbalance between each sub-conductor of each wire jumper.Not during belt tension, every root lead is installed in the raw, carries out shaping by conductor spacer again after the installation, makes the whole neat appearance of wire jumper at wire jumper.But during the drainage thread belt tension, may make the tension force of lead too concentrate on a or two lead, make the shape of whole wire jumper that irregular variation take place, can't carry out good shaping by conductor spacer.Simultaneously, strain insulator-string can cause reversing of triangle yoke plate that the strain insulator-string sub-conductor connected when wire jumper is subjected to force unbalance.Therefore, the sub-conductor length requirement when mounted of wire jumper can be carried out certain adjusting, with the equalization of strain between each sub-conductor of balance.And continue to use original structure, the drainage wire clamp also will be born the function of water conservancy diversion, is difficult to wire jumper length is regulated.
Summary of the invention
The purpose of this utility model provides the stressed single-column little, that drainage effect is good of a kind of wire jumper and makes up transposition strain tower flexible jumper system.
For achieving the above object, the utility model is by the following technical solutions:
The present invention is dangled to go here and there by strain insulator-string and wire jumper and is constituted, and the two connects by wire jumper;
Described strain insulator-string comprises towing plate, insulator and the strain clamp that is connected successively, at described strain clamp front end the steel hanging point is set, and the steel hanging point directly articulates wire jumper; And described strain clamp connects the drainage lead by the drainage wire clamp; Described strain clamp, steel hanging point, drainage wire clamp all are arranged in the shading ring, are provided with grading ring in the front end both sides of shading ring;
The described wire jumper string that dangles comprises yoke plate and is arranged on suspension clamp on the yoke plate that the angle of dangling of described suspension clamp is 0 °~42 °; The yoke plate front end connects insulator, and the front end of wire jumper insulator is provided with the wire jumper towing plate.
In strain insulator-string, be connected with flower basket bolt on the described steel hanging point.
In strain insulator-string, described strain clamp, steel hanging point, device clamp are arranged on up and down in two shading rings.
In wire jumper dangled string, yoke plate was composite type leveling yoke plate or is whole yoke plate.
In wire jumper dangles string, between described yoke plate and the wire jumper insulator, between wire jumper insulator and the wire jumper towing plate all by U type link.
Adopt the utility model of such scheme, strain insulator-string is with the water conservancy diversion of wire jumper and separating of stressed two kinds of functions, the pulling force that is wire jumper no longer acts on the drainage plate of strain clamp, but establish a steel hanging point at the front end of strain clamp, patch cord end directly is hung on wire jumper on the steel hanging point after adopting conventional strain clamp fixing.Strain insulator-string outlet structure after the improvement, make the terminal board of strain clamp no longer bear the pulling force of wire jumper, strain clamp main body itself is not subjected to the influence of wire jumper pulling force yet, but the pulling force of wire jumper is directly acted on the good steelwork of mechanical property, has improved the safety and reliability of gold utensil.And the drainage thread that improves between back wire jumper and the lead by particular design couples together the strain clamp terminal board of lead and wire jumper, and the drainage lead is only born the function of water conservancy diversion, does not bear tension force.
Description of drawings
Fig. 1 is existing 500kv circuit strain clamp commonly used.
Fig. 2 is the outlet structure schematic diagram of existing strain clamp.
Fig. 3 is that A-A among Fig. 2 is to view.
Fig. 4 is the overall structure schematic diagram of strain insulator-string in the utility model.
Fig. 5 is the vertical view of strain insulator-string in the utility model.
Fig. 6 is the overall structure schematic diagram of the wire jumper string that dangles in the utility model.
Embodiment
The utility model is made of the strain insulator-string and the wire jumper string that dangles, and the wire jumper that dangles was ganged up the outstanding two ends of drawing two strain insulator-strings of wire jumper, and the structural relation of the two is a technology well known to those of ordinary skill in the art.Below the strain insulator-string and the wire jumper string that dangles are specified.
As Fig. 4, shown in Figure 5, the utility model comprises towing plate 1, insulator 2 and the strain clamp 3 that is connected successively, at above-mentioned strain clamp 3 front ends steel hanging point 4 is set, and steel hanging point 4 directly articulates wire jumper; And above-mentioned strain clamp 3 connects drainage lead 6 by drainage wire clamp 5.Like this, the utility model separates the water conservancy diversion of wire jumper with stressed two kinds of functions.The pulling force of wire jumper no longer acts on the drainage plate of strain clamp, but establishes a steel hanging point at the front end of strain clamp, and patch cord end directly is hung on wire jumper on the steel hanging point after adopting conventional strain clamp fixing.Strain insulator-string outlet structure after the improvement, make the terminal board of strain clamp no longer bear the pulling force of wire jumper, strain clamp main body itself is not subjected to the influence of wire jumper pulling force yet, but the pulling force of wire jumper is directly acted on the good steelwork of mechanical property, has improved the safety and reliability of gold utensil.
Common 500kV power line tension string shielding scheme is at strain insulator-string a big racetrack to be installed each side all to press shading ring, if the utility model also adopts this scheme, the gold utensil of wire jumper and connection thereof will be interfered with grading ring and be collided, and influence the grading ring serviceability.Therefore the utility model adopts two side dress grading rings 8, the voltage of controlling insulator distributes, and both sides install shading ring 7 additional up and down, and strain clamp 3, steel hanging point 4, drainage wire clamp 5 all are arranged on up and down in two shading rings 7, prevent that the gold utensil string from producing corona, avoid wire jumper gold utensil and shading ring to interfere.
Be connected with length-adjustable flower basket bolt 9 on the above-mentioned steel hanging point 4, flower basket bolt 9 can play the regulating action that arrives very much in the process of moulding test.
As shown in Figure 6, the wire jumper string that dangles comprises yoke plate 10 and is arranged on suspension clamp 11 on the yoke plate 10 that the angle of dangling of above-mentioned suspension clamp 11 is 0 °~42 °; Yoke plate 10 front ends connect insulator 13, and the front end of wire jumper insulator 13 is provided with wire jumper towing plate 14.
Need to prove, generally line conductor dangles the angle about 8-12 °, the suspension clamp angle of dangling generally is no more than 25 °, roughly 13-17 ° at the angle of dangling of common suspension clamp suspension clamp free time, the line angle that goes out during single-column combination transposition strain tower flexible jumper wire jumper process suspension clamp is not more than 120 °, the line angle that goes out of suspension clamp is not less than 30 °, contact with the wire clamp outlet when moving for reducing wire jumper, reserve free time of about 100 angle of dangling, therefore the utility model is designed to 42 ° with the angle of dangling of suspension clamp 11, promptly also can be 0 °, 10 °, 20 °, 30 °, 40 °, in 42 ° any one.
The suspension clamp of in wire jumper, using aspect stressed much smaller than the suspension clamp of regular link, lead at the stress in wire clamp exit also much smaller than the common line suspension clamp, so the radius of curvature of suspension clamp is by the standard design of general circuit suspension clamp, just can satisfy instructions for use, promptly the radius of curvature of suspension clamp is greater than 8 times of diameters of lead.This design wire jumper suspension clamp wire casing radius of curvature is designed to R300, is about 9 times of diameters of lead, 8 times of diameters of overgauge, and its bending stress does not influence the lead serviceability in the time of can guaranteeing the wire jumper operation.
Because the tension force of flexible jumper is less, the grip of 11 pairs of leads of suspension clamp is got 35.7 and is kN, and failure load is decided to be more than the 40kN, install additional when mounted aluminium armor tape to lead to protecting.Consider during design that self is anticorona, adopt than the larger radius of curvature arc transition wire clamp main body outer surface edges and corners, guarantees that wire clamp does not produce corona when operation.
In wire jumper dangled string, yoke plate 10 was composite type leveling yoke plate or is whole yoke plate.Whole yoke plate has made full use of less these characteristics of wire jumper tension force, adopts full rigid structure, and behind the wire jumper simulation moulding test group dress, the wire jumper molding effect is better, and construction install convenience.
In addition, in wire jumper dangles string, between yoke plate 10 and the wire jumper insulator 13, between wire jumper insulator 13 and the wire jumper towing plate 14 all by U type link 12.In general, usually synthetic insulator is attached thereto the gold utensil that connects and adopts a bulb bowl connected mode, the vertical load of string is bigger owing to dangle usually, insulator pin is difficult for coming off from gold utensil bowl head, and the single-column combination transposition strain tower flexible jumper wire jumper string drift angle of dangling is bigger, it is less to cut vertical load, if continue to adopt a bulb bowl connected mode, under strong wind or other bad weather conditions, insulator pin comes off from the bowl head probably, therefore adopted to be connected when the connected mode of design insulator and gold utensil and encircled connected mode reliably, the possibility that this connected mode does not exist insulator to come off connects more safe and reliable.

Claims (5)

1. a single-column makes up transposition strain tower flexible jumper system, it is characterized in that: it is dangled to go here and there by strain insulator-string and wire jumper and constitutes, and the two connects by wire jumper;
Described strain insulator-string comprises towing plate (1), insulator (2) and the strain clamp (3) that is connected successively, at described strain clamp (3) front end steel hanging point (4) is set, and steel hanging point (4) directly articulates wire jumper; And described strain clamp (3) connects drainage lead (6) by drainage wire clamp (5); Described strain clamp (3), steel hanging point (4), drainage wire clamp (5) all are arranged in the shading ring (7), are provided with grading ring (8) in the front end both sides of shading ring (7);
The described wire jumper string that dangles comprises yoke plate (10) and is arranged on suspension clamp (11) on the yoke plate (10) that the angle of dangling of described suspension clamp (11) is 0 °~42 °; Yoke plate (10) front end connects insulator (13), and the front end of wire jumper insulator (13) is provided with wire jumper towing plate (14).
2. single-column according to claim 1 makes up transposition strain tower flexible jumper system, it is characterized in that: in strain insulator-string, be connected with flower basket bolt (9) on the described steel hanging point (4).
3. single-column according to claim 1 combination transposition strain tower flexible jumper system is characterized in that: in strain insulator-string, described strain clamp (3), steel hanging point (4), device clamp (5) are arranged on up and down in two shading rings (7).
4. single-column according to claim 1 makes up transposition strain tower flexible jumper system, it is characterized in that: in wire jumper dangled string, yoke plate (10) was composite type leveling yoke plate or is whole yoke plate.
5. single-column according to claim 1 makes up transposition strain tower flexible jumper system, it is characterized in that: in wire jumper dangles string, between described yoke plate (10) and the wire jumper insulator (13), between wire jumper insulator (13) and the wire jumper towing plate (14) all by U type link (12).
CN2010206624824U 2010-12-16 2010-12-16 Flexible jumper system for single-pole combined transposition strain tower Expired - Fee Related CN201877760U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010206624824U CN201877760U (en) 2010-12-16 2010-12-16 Flexible jumper system for single-pole combined transposition strain tower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010206624824U CN201877760U (en) 2010-12-16 2010-12-16 Flexible jumper system for single-pole combined transposition strain tower

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104283173A (en) * 2013-07-04 2015-01-14 上海艾迪欧电力防振金具有限公司 Anticorona voltage-sharing type strain insulator-string set
CN110571738A (en) * 2019-08-20 2019-12-13 中国能源建设集团江苏省电力设计院有限公司 device and method for leading and connecting multiple split conductors in transmission line gear
CN111630741A (en) * 2017-12-04 2020-09-04 Axpo电力公司 Transmission line conductor bridging device and application in method for modifying or manufacturing overhead line tower

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104283173A (en) * 2013-07-04 2015-01-14 上海艾迪欧电力防振金具有限公司 Anticorona voltage-sharing type strain insulator-string set
CN104283173B (en) * 2013-07-04 2018-01-02 上海艾迪欧电力防振金具有限公司 Anticorona die mould strain insulator-string group
CN111630741A (en) * 2017-12-04 2020-09-04 Axpo电力公司 Transmission line conductor bridging device and application in method for modifying or manufacturing overhead line tower
CN111630741B (en) * 2017-12-04 2022-07-15 Axpo系统网络公司 Transmission line conductor bridging device and application in method for modifying or manufacturing overhead line tower
CN110571738A (en) * 2019-08-20 2019-12-13 中国能源建设集团江苏省电力设计院有限公司 device and method for leading and connecting multiple split conductors in transmission line gear

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110622

Termination date: 20161216