CN2682706Y - Pre-twisted strain clamp for overhead line - Google Patents
Pre-twisted strain clamp for overhead line Download PDFInfo
- Publication number
- CN2682706Y CN2682706Y CN 200420032710 CN200420032710U CN2682706Y CN 2682706 Y CN2682706 Y CN 2682706Y CN 200420032710 CN200420032710 CN 200420032710 CN 200420032710 U CN200420032710 U CN 200420032710U CN 2682706 Y CN2682706 Y CN 2682706Y
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- strain clamp
- strain
- preformed
- twisted
- heart
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Abstract
The utility model relates to a pre-twisted type strain clamp for overhead lines, which is composed of strain pre-twisted wires pre-twisted into spiral shapes and a heart-shaped strain ring, wherein, the strain pre-twisted wires are in the double-folded state and are sheathed on the heart-shaped strain ring, and the bending point of the strain pre-twisted wires sheathed on the heart-shaped strain ring is a U-shaped angle head. The rest parts of the pre-twisted wires are arranged uniformly to form a hollow-columned strain clamp body provided with an axial core hole inside. The grasp force of the pre-twisted type strain clamp can achieve more than 100 percent of the counting breaking force of the conducting wire. The stress received by the conducing wire is uniformly distributed on a very large area, without the harmful focal point of the stress. The utility model can reduce dynamic stress and prevent the phenomenon of breaking lines caused by the fatigue of materials. The pre-twisted type strain clamp for overhead lines has the definite vibration-proof function itself, and can increase the vibration proofing ability of the conducting wire, with simple structure, easy installation and good installation quality consistency. One person can finish the installation quickly by hands. The conducting wire can not be damaged in the full installation process. The utility model has strong corrosion resistance and stable performance and can normally operate under the extremely bad environment, and the grasp force is never released.
Description
(1) technical field:
The utility model relates to the preformed strain clamp of a kind of strain clamp that is used for overhead transmission line, distribution line and electric substation fixing cord, ground wire and backguy on the strain insulator shaft tower, particularly overhead transmission line.
(2) background technology:
Existing strain clamp mainly contains screw bolt-type strain clamp, wedge type strain clamp and compression-type strain clamp.The screw bolt-type strain clamp is that the friction effect of borrowing the waveform wire casing of the pressure at right angle of U-shaped screw and wire clamp to be produced fixes lead, because the coefficient of friction of waveform wire casing is limited, for obtaining enough grips, must strengthen the bearing capacity of U-shaped screw and the quantity of screw, therefore its complex structure, and installation difficulty height.The wedge shape strain clamp is made of with filling in chock wherein wedge type strain clamp body, steel strand wire bend to the shape the same with chock during installation, be installed in the wedge type strain clamp body, after steel strand wire are stressed, chock and steel strand wire export slippage along the durable bracing cable folder of wedge type body barrel to it simultaneously, more draw tightlier, be locking state gradually.This wedge type strain clamp is the power of the splitting effect that utilizes wedge type, and steel strand wire are locked in the wire clamp.Because the steel strand wire discontinuity that is locked, therefore the fragile steel strand wire of this wire clamp shorten its useful life.The compression-type strain clamp is continued and anchoring steel reinforced aluminium conductor steel core by the steel anchor, make the aluminum pipe body produce plastic deformation with pressure then, thereby make wire clamp and wire-bonds as a whole, no matter but adopt hydraulic pressure or detonation pressure method to install, all need special equipment, complicated operation, installation quality is wayward.
(3) summary of the invention:
The utility model will disclose a kind of simple in structure, can make the preformed strain clamp of the uniform overhead transmission line of the suffered stress of overhead transmission line.
The preformed strain clamp of overhead transmission line, strain insulator preformed armor rods and heart-shaped tensioning ring by preformed curl constitute, the strain insulator preformed armor rods is doubled state and is placed on the heart-shaped tensioning ring, its bending place that is nested in heart-shaped tensioning ring is U shape elbow, and all the other parts of preformed armor rods have the hollow cylindrical strain clamp body in axial core hole in evenly distributed being.
In order to make this strain clamp Stability Analysis of Structures, can be between the preformed armor rods by the bonding bunchy of viscose binder.
In order to increase grip, also can be stained with the diamond dust that increases overhead wire and wire clamp frictional force on the axial core hole inwall of strain clamp body.
Install for convenience, the junction of U type elbow and strain clamp body can be provided with colour coding.
Partly preferably be twisted into the twisted wire shape earlier bends to U-shaped to return bend again.
This overhead transmission line is with preformed strain clamp function and characteristics:
1〉this preformed strain clamp can substitute the strain clamp of conventionally forms such as the wedge type clamp of existing screw bolt-type strain clamp and all versions and compression-type strain clamp fully.
2〉unique design of this preformed strain clamp, can reduce by vibration and wave the dynamic stress that causes, prevent because the stubborn repeatedly folding of lead, ground wire and backguy, cause because of fatigue of materials a disconnected burst of phenomenon takes place, and itself have certain anti-vibration functions, can improve the anti-ability of shaking of lead, ground wire and backguy.
3〉this preformed strain clamp is wrapped in lead, ground wire and backguy outside equably with certain length, the stress that lead, ground wire and backguy is suffered is evenly distributed on one than on the much bigger zone of the stress area of other pattern strain clamp, makes lead, ground wire and backguy not have harmful stress concentration point.
4〉this preformed strain clamp intensity height, its grip can reach lead, ground wire and backguy and calculate more than 100% of pull-off force.
5〉be under the various tension states in lead, ground wire and backguy, this preformed strain clamp remains at the state of holding with a firm grip, is running under extreme rugged environment, tension force, impact, the extreme temperature, and wire clamp still can normally move, and grip never discharges.
6〉this preformed durable bracing cable folder material and institute's wrappage (twisted wire) are in full accord, thereby guarantee than strong corrosion resistant.
7〉particular design of this preformed strain clamp has avoided bolt, nut, packing ring and other parts in the possibility of installing or operation is lost or damaged therebetween.
8〉this preformed strain clamp is in service a very high reliability, defeated, distribution line is had excellent protection, thereby guarantee the good economy of power system operation.
9〉installation quality of this preformed strain clamp is subjected to installer's artificial factor little, the installation quality high conformity, and full installation process can damage wires, ground wire and backguy.
10〉simple installation of this preformed strain clamp is quick, need not any instrument at the scene, just can free-handly rapidly finish installation by a people.
(4) description of drawings:
Fig. 1 is a kind of execution mode structural representation of the present utility model;
Fig. 2 is an execution mode user mode reference diagram shown in Figure 1.
(5) embodiment:
In execution mode shown in Figure 1, the preformed strain clamp of this overhead transmission line, strain insulator preformed armor rods and heart-shaped tensioning ring 1 by preformed curl constitute, the strain insulator preformed armor rods is doubled state and is placed on the heart-shaped tensioning ring 1, its bending place that is placed in heart-shaped tensioning ring 1 is U shape elbow 2, and all the other parts of preformed armor rods have the hollow cylindrical strain clamp body 3 in axial core hole in evenly distributed being.Between the preformed armor rods by the bonding bunchy of viscose binder.Be stained with the diamond dust that increases overhead wire and wire clamp frictional force on the axial core hole inwall of strain clamp body 3.U type elbow 2 is provided with colour coding 4 with the junction of strain clamp body 3.Partly be twisted into the twisted wire shape bends to U-shaped to return bend 2 again.
During use, preformed armor rods is passed heart-shaped tensioning ring 1, begin preformed armor rods uniform winding with the strain clamp body outside power overhead network from colour coding 4, heart-shaped tensioning ring 1 is strained and fixed to get final product.
Claims (5)
1, the preformed strain clamp of overhead transmission line, it is characterized in that: it is made of the strain insulator preformed armor rods and the heart-shaped tensioning ring (1) of preformed curl, the strain insulator preformed armor rods is doubled state and is nested on the heart-shaped tensioning ring (1), its bending place that is placed in heart-shaped tensioning ring (1) is U type elbow (2), and all the other parts of preformed armor rods have the hollow cylindrical strain clamp body (3) in axial core hole in evenly distributed being.
2, the preformed strain clamp of overhead transmission line according to claim 1 is characterized in that: between the preformed armor rods by the bonding bunchy of viscose binder.
3, the preformed strain clamp of overhead transmission line according to claim 1 and 2 is characterized in that: be stained with the diamond dust that increases overhead wire and wire clamp frictional force on the axial core hole inwall of strain clamp body (3).
4, the preformed strain clamp of overhead transmission line according to claim 1 and 2 is characterized in that: return bend (2) is provided with colour coding (4) with the junction of strain clamp body (3).
5, the preformed strain clamp of overhead transmission line according to claim 1 and 2 is characterized in that: partly be twisted into the twisted wire shape bends to U-shaped to return bend (2) again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420032710 CN2682706Y (en) | 2004-01-18 | 2004-01-18 | Pre-twisted strain clamp for overhead line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420032710 CN2682706Y (en) | 2004-01-18 | 2004-01-18 | Pre-twisted strain clamp for overhead line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2682706Y true CN2682706Y (en) | 2005-03-02 |
Family
ID=34607337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420032710 Expired - Lifetime CN2682706Y (en) | 2004-01-18 | 2004-01-18 | Pre-twisted strain clamp for overhead line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2682706Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101859992A (en) * | 2010-06-11 | 2010-10-13 | 沈阳电业局电缆厂 | Multifunctional tension resistant wire clamp |
| CN101548445B (en) * | 2006-12-28 | 2012-06-13 | 3M创新有限公司 | Method for selecting conductors of an overhead power transmission line |
| CN102856863A (en) * | 2012-10-08 | 2013-01-02 | 江苏天南电力器材有限公司 | Preformed strain clamp |
| CN108574248A (en) * | 2017-03-12 | 2018-09-25 | 深圳带路科技有限公司 | A kind of anti-lost line apparatus of overhead transmission line |
-
2004
- 2004-01-18 CN CN 200420032710 patent/CN2682706Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101548445B (en) * | 2006-12-28 | 2012-06-13 | 3M创新有限公司 | Method for selecting conductors of an overhead power transmission line |
| CN101859992A (en) * | 2010-06-11 | 2010-10-13 | 沈阳电业局电缆厂 | Multifunctional tension resistant wire clamp |
| CN102856863A (en) * | 2012-10-08 | 2013-01-02 | 江苏天南电力器材有限公司 | Preformed strain clamp |
| CN102856863B (en) * | 2012-10-08 | 2015-10-07 | 江苏天南电力器材有限公司 | A kind of pre-hinged strain clamp |
| CN108574248A (en) * | 2017-03-12 | 2018-09-25 | 深圳带路科技有限公司 | A kind of anti-lost line apparatus of overhead transmission line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140118 Granted publication date: 20050302 |