CN101752816B - Dead-end clamp for supporting expanded diameter conductors - Google Patents
Dead-end clamp for supporting expanded diameter conductors Download PDFInfo
- Publication number
- CN101752816B CN101752816B CN200910243404.2A CN200910243404A CN101752816B CN 101752816 B CN101752816 B CN 101752816B CN 200910243404 A CN200910243404 A CN 200910243404A CN 101752816 B CN101752816 B CN 101752816B
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- Prior art keywords
- strain insulator
- pipe
- steel
- strain
- expanded diameter
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- 239000004020 conductor Substances 0.000 title claims abstract description 56
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 110
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 109
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 92
- 239000010959 steel Substances 0.000 claims abstract description 92
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 34
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 4
- 239000012211 strain insulator Substances 0.000 claims description 91
- 239000004411 aluminium Substances 0.000 claims description 41
- 238000002788 crimping Methods 0.000 claims description 17
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 7
- 239000010931 gold Substances 0.000 claims description 7
- 229910052737 gold Inorganic materials 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 26
- 239000000463 material Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000272165 Charadriidae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Suspension Of Electric Lines Or Cables (AREA)
- Insulators (AREA)
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
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 wire is connected to the gold utensil on strain insulator string, except bearing the whole pulling force of wire, also as electric conductor conduction current, is the important gold utensil in transmission line.It is target that ultra high voltage engineering be take construction " environmentally friendly " engineering, optimizes the design of engineering comprehensively, and strict guarantee electric field, magnetic field, audible noise and radio interference level meet standard-required.For this reason, if design adopts plain conductor, certainly will to strengthen conductor cross-section and increase the division radical of wire, certainly will increase like this use amount of wire and bus, the physical dimension of steel tower and circuit width of corridor etc., thereby strengthen construction investment.If met under the prerequisite of transmission line capability and line project requirement, design adopts a kind of new structure wire that guarantees power transmission conductor current capacity, and by enlarged-diameter and make as far as possible its any surface finish round and smooth, will greatly save conductor material like this, and make the external diameter and surperficial transmission of electricity and the corona requirement that can meet circuit of wire, thereby the total weight and the wire division radical that have greatly reduced wire, reduced steel tower load and construction weight, thereby significantly reduced track investment.For this reason, design has adopted expanded conductor, in the hope of optimizing steel tower and line design, reduces construction investment.Expanded conductor, as a kind of wire of new structure, needs a kind of strain clamp of special construction to coordinate with it, and stable effectively gripping is connected to supporting expanded diameter conductor on strain insulator string.
High density polyethylene (HDPE) supporting expanded diameter conductor is the neoteric a kind of version wire of China, as shown in Figure 1, this supporting expanded diameter conductor comprises steel core 2, 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 strain clamp to clamp this wire, strain insulator aluminum pipe can directly be crimped onto on wire, because high density polyethylene (HDPE) supporting layer 3 can not directly be crimped onto in metal conventionally, even also can not get good stable curable grip in metal steel core 2 so high density polyethylene (HDPE) supporting layer 3 is directly crimped onto, but also can there is serious potential safety hazard.For this reason, the present invention proposes a kind of new technical solution and clamp high density polyethylene (HDPE) supporting expanded diameter conductor.
Summary of the invention
In order to overcome the defect of prior art, the object of the present invention is to provide a kind of safe and reliable strain clamp 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 conduction wire clamp, it is characterized in that:
Described strain insulator aluminum pipe 8 is the structure of welding drainage plate on an extruded aluminum tube; Strain insulator steel anchor one end has draw ring, and the other end is that steel pipe shape is for gripping the steel core of supporting expanded diameter conductor; Described conduction wire clamp is for by making aluminum pipe extrusion process, and conduction wire clamp is crimped onto on strain insulator wire jumper for delivered current; After the steel pipe crimping of strain insulator steel anchor, grip the steel core part of supporting expanded diameter conductor, the draw ring of strain insulator steel anchor is connected on the steel tower of transmission line by hardware string; After the crimping of strain insulator aluminum pipe, one end grips supporting expanded diameter conductor and aluminium bushing 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 strain insulator aluminum pipe is crimped on outer aluminum steel and aluminium bushing pipe;
Conduction wire clamp is connected for the conducting of electric current with the drainage plate on strain insulator aluminum pipe by bolt group; After crimping completes, the steel pipe end of strain insulator aluminum pipe, aluminium bushing pipe and strain insulator steel anchor grips supporting expanded diameter conductor, 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 by gold utensil the transmission that completes weight load on steel tower again;
On supporting expanded diameter conductor, the circulation path of electric current is: the drainage plate on wire aluminum steel, strain insulator aluminum pipe, strain insulator aluminum pipe, conduction wire clamp and strain insulator wire jumper.
Wherein, described aluminium bushing pipe only grips the steel core of wire in strain insulator aluminum pipe, and the length of described aluminium bushing pipe is 6.5-7 times of described wire overall diameter.
Wherein, described aluminium bushing pipe grips the steel core of wire and the steel pipe of strain insulator steel anchor in strain insulator aluminum pipe simultaneously.
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 semi-circular tube is spliced.
Wherein, adopt two-sided electrical contact design between described drainage plate and conduction wire clamp, the drainage plate of described strain insulator aluminum pipe is the bifurcation structure of trestling, and the two-sided of described conduction wire clamp can contact with described drainage plate.
Wherein, described strain insulator steel anchor comprises draw ring and connecting portion, at the front end of connecting portion, is provided with steel pipe, and steel pipe is for gripping the steel core of supporting expanded diameter conductor.
Wherein, the draw ring of described strain insulator steel anchor and the transition portion between connecting portion have oblique shoulder.
Wherein, in the periphery of described connecting portion, be distributed with the annular groove closely compressing with strain insulator aluminum pipe inwall.
Beneficial effect of the present invention is: adopt ripe fluid pressure type strain clamp, compression joint technique is ripe, and crimp quality is easily protected.The aluminium bushing pipe identical with high density polyethylene (HDPE) supporting layer with inside/outside diameter size substitutes high-density polyethylene layer, guarantees that strain clamp grips wire effective, stable.
In addition, strain clamp of the present invention adopts aluminium bushing pipe to replace high density polyethylene (HDPE) supporting layer, strain insulator aluminum pipe is crimped on the wire outside of having replaced supporting layer with aluminium bushing pipe, 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, conduction wire clamp, by conduction wire clamp, be delivered on wire jumper again, finally realize the object that strain clamp is electric conductor conduction current.
Accompanying drawing explanation
In order to make content of the present invention by clearer understanding, and be convenient to the description of embodiment, provide accompanying drawing related to the present invention below and be described as follows:
Fig. 1 is the cross-sectional view of supporting expanded diameter conductor;
Fig. 2 is the overall structure schematic diagram before strain clamp crimping for supporting expanded diameter conductor of the present invention;
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 conduction wire clamp;
Fig. 7 is the overall structure schematic diagram after strain clamp crimping for supporting expanded diameter conductor of the present invention;
Fig. 8 is the A-A cutaway view of Fig. 7;
Wherein, 1-wire, 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, 71-draw ring, 72-connecting portion, 73-steel pipe, 74--tiltedly takes on, 75-annular groove, 8-strain insulator aluminum pipe, 9-conduction wire clamp, 10-strain insulator wire jumper, 11-drainage plate.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme of strain clamp of the present invention is further described in detail.
As shown in Figure 2, in this example for the strain clamp of supporting expanded diameter conductor, mainly comprise strain insulator steel anchor 7, strain insulator aluminum pipe 8, conduction wire clamp 9 and aluminium bushing pipe 6, the top of described conduction wire clamp 9 adopts connecting bolt to be connected with the drainage plate 11 on strain insulator aluminum pipe 8, its underpart is crimped with a strain insulator wire jumper for delivered current, described strain insulator steel anchor 7 is connected to 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, in order to reach better compression effect, make the thickness of aluminium bushing pipe 6 identical with supporting layer 3 thickness of wire 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 for gripping the steel core 2 of supporting expanded diameter conductor 1, transition portion between draw ring 71 and connecting portion 72 is provided with oblique shoulder 74, is distributed with and annular groove 75 that strain insulator aluminum pipe 8 inwalls closely compress in 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, can be also the pipe being spliced by two semi-circular tubes.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, and after whole strain clamp is crimped, aluminium bushing pipe 6 is directly 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 wire, for substituting the supporting layer of certain length, the 6.5-7 that 6 gripping steel cores 2 of supporting expanded diameter conductor of aluminium bushing pipe of this kind of structure and the length of aluminium bushing pipe 6 are set to wire 1 overall diameter is doubly for best; Also a part for aluminium bushing pipe can be arranged on to interior steel pipe 73 outsides that are socketed in strain insulator steel anchor for substituting a section of supporting layer, another part of internal layer aluminum steel 4 of wire, the aluminium bushing pipe 6 that is this kind of 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 conduction wire clamp 9 is connected for the conducting of electric current with the drainage plate 11 on strain insulator aluminum pipe by bolt, the bottom of conduction wire clamp 9 is crimped with a strain insulator wire jumper for delivered current, owing to adopting two-sided electrical contact design between conduction wire clamp 9 and drainage plate 11, so the two-sided of conduction wire clamp 9 all can contact with drainage plate 11.
On supporting expanded diameter conductor, the circulation path of electric current is: the drainage plate 11 on wire 1, strain insulator aluminum pipe 8, strain insulator aluminum pipe, conduction wire clamp 9 and strain insulator wire jumper 10.
As Fig. 7, shown in Fig. 8, strain clamp of the present invention is when being connected with supporting expanded diameter conductor, first divest the outer aluminum steel 5 of certain length on this wire 1, internal layer aluminum steel 4 and supporting layer 3, make the steel core 2 at wire center expose certain length, again the supporting layer of certain length 3 is divested and with aluminium bushing pipe 6, replace afterwards, 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 wire 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 in the C of crimping position shown in figure place, finally by the crimping of hydraulic test (not shown), complete the installation (B in Fig. 7 of strain clamp of the present invention and wire 1, C is described crimping position).
After crimping completes, steel pipe 73 ends of strain insulator aluminum pipe 8, aluminium bushing pipe 6 and strain insulator steel anchor 7 grip supporting expanded diameter conductor 1, 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 by gold utensil the transmission that completes weight load on steel tower again.
The present invention is a kind of fluid pressure type strain clamp for supporting expanded diameter conductor, owing to being supported by high density polyethylene (HDPE) between the aluminum-wire layer of supporting expanded diameter conductor and 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 gold utensil.Therefore designed a kind of scheme, the high density polyethylene (HDPE) supporting layer of excision certain length, the aluminum pipe of use the internal-and external diameters of etc.ing substitutes filling, crimping strain insulator, continue aluminum pipe time be crimped onto on filling 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 combining and/or change the feature of single embodiment.Therefore, be understandable that these modification and optional embodiment will be considered as included in the present invention, scope of the present invention is enclosed invention claims and coordinate restriction thereof only.
Claims (5)
1. a supporting expanded diameter conductor strain clamp, comprises strain insulator aluminum pipe (8), strain insulator steel anchor (7), aluminium bushing pipe (6) and conduction wire clamp (9), it is characterized in that:
Described strain insulator aluminum pipe (8) is on an extruded aluminum tube, to weld the structure of drainage plate (11); Strain insulator steel anchor (7) one end has draw ring, and the other end is that steel pipe shape is for gripping the steel core (2) of supporting expanded diameter conductor (1); Described conduction wire clamp (9) is for by aluminum pipe extrusion process is made, and it is upper for delivered current that conduction wire clamp (9) is crimped onto strain insulator wire jumper (10); Steel core (2) part that grips 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 connected on the steel tower of transmission line by hardware string; After strain insulator aluminum pipe (8) crimping, one end grips supporting expanded diameter conductor (1), 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 aluminium bushing pipe (6);
Conduction wire clamp (9) is connected for the conducting of electric current with the drainage plate (11) on strain insulator aluminum pipe (8) by bolt group; After crimping completes, the steel pipe end of strain insulator aluminum pipe (8), aluminium bushing pipe (6) and strain insulator steel anchor (7) grips supporting expanded diameter conductor (1), 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 by gold utensil the transmission that completes weight load on steel tower again;
On supporting expanded diameter conductor, the circulation path of electric current is: the drainage plate (11) on wire (1), strain insulator aluminum pipe (8), strain insulator aluminum pipe, conduction wire clamp (9) and strain insulator wire jumper (10);
Described aluminium bushing pipe (6) only grips the steel core (2) of wire in strain insulator aluminum pipe (8), and the length of described aluminium bushing pipe (6) is 6.5-7 times of described wire (1) overall diameter;
The thickness of described aluminium bushing pipe (6) equals the thickness of high density polyethylene (HDPE) supporting layer (3);
Described aluminium bushing pipe (6) is integrally formed pipe or two pipes that semi-circular tube is spliced.
2. strain clamp as claimed in claim 1, it is characterized in that: between described drainage plate (11) and conduction wire clamp (9), adopt two-sided electrical contact design, the drainage plate of described strain insulator aluminum pipe (11) is the bifurcation structure of trestling, and the two-sided of described conduction wire clamp (9) can contact with described drainage plate (11).
3. strain clamp as claimed in claim 1, it is characterized in that: described 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), and steel pipe (73) is for gripping the steel core (2) of supporting expanded diameter conductor (1).
4. strain clamp as claimed in claim 3, is characterized in that: the draw ring (71) of described strain insulator steel anchor (7) and the transition portion between connecting portion (72) have oblique shoulder (74).
5. strain clamp as claimed in claim 4, is characterized in that: in the periphery of described connecting portion (72), be distributed with the annular groove (75) closely compressing with strain insulator aluminum pipe (8) inwall.
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101752816A CN101752816A (en) | 2010-06-23 |
| CN101752816B true CN101752816B (en) | 2014-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910243404.2A Active CN101752816B (en) | 2009-12-21 | 2009-12-21 | Dead-end clamp for supporting expanded diameter conductors |
Country Status (1)
| Country | Link |
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| CN (1) | CN101752816B (en) |
Families Citing this family (7)
| 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 |
| 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 |
| 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 |
| CN115377909B (en) * | 2022-08-04 | 2024-05-10 | 湖北恒东电力设备有限公司 | Tension-resistant wire clamp for traction wire |
Citations (2)
| 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 |
-
2009
- 2009-12-21 CN CN200910243404.2A patent/CN101752816B/en active Active
Patent Citations (2)
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101752816A (en) | 2010-06-23 |
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Owner name: STATE ELECTRIC NET CROP. Effective date: 20130129 |
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Effective date of registration: 20130129 Address after: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Applicant after: China Electric Power Research Institute Applicant after: State Grid Corporation of China Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Applicant before: China Electric Power Research Institute |
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