CN102005706A - Clamping apparatus of live line tools - Google Patents
Clamping apparatus of live line tools Download PDFInfo
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- CN102005706A CN102005706A CN 201010531949 CN201010531949A CN102005706A CN 102005706 A CN102005706 A CN 102005706A CN 201010531949 CN201010531949 CN 201010531949 CN 201010531949 A CN201010531949 A CN 201010531949A CN 102005706 A CN102005706 A CN 102005706A
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- jig
- mounting groove
- hanging roller
- slide block
- hydraulic cylinder
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Abstract
The invention relates to a clamping apparatus of live line tools, which comprises a front clamping apparatus and a rear clamping apparatus; one end of the front clamping apparatus is provided with a first installation groove and a first curve part; one end of the rear clamping apparatus is provided with a second installation groove and a second curve part; the other end part of the rear clamp apparatus which is corresponding to the second installation groove is provided with a third installation groove, the end part of the rear clamping apparatus which is corresponding to the third installation groove is concavely equipped with a connecting chute, the connecting chute and the third installation groove are located at the two sides of the rear clamping apparatus respectively, and the connecting chute is communicated with the bottom of the third installation groove; and a hydraulic cylinder slide block is arranged in the connecting chute. In the invention, the front clamping apparatus is installed on a first hardware fittings set square; the rear clamping apparatus is installed on a second hardware fittings set square; and the rear clamping apparatus is connected with the front clamping apparatus through an insulation extraction stick, a hydraulic bearing tool expands the insulation gap between the insulation combination through the corresponding coordination of the front clamping apparatus, the rear clamping apparatus and the insulation extraction stick, and meanwhile the connection is safe and reliable, and fall off is not easy; and the clamping apparatus of the live line tools has a simple structure, is convenient to install and use, and is safe and reliable to use.
Description
Technical field
The present invention relates to a kind of electric power overhaul instrument, especially a kind of charged transposing insulator instrument belongs to the technical field of electric power tool.
Background technology
Along with the high speed development of China's power grid construction, live line working more and more presents its importance.When strain insulator porcelain vase string is changed in live line working, in order effectively to increase insulation distance, need 5 tons of live line working universal hydraulic load instrument overall structures are installed in porcelain vase string end near the cross-arm place, simultaneously hydraulic pressure load instrument and jig be connected to a ball recess structure, avoided stress to concentrate.At present, with the jig of the corresponding cooperation of hydraulic pressure load instrument, hydraulic pressure load instrument insulation combinational gap is apart from deficiency, and and line hardware yoke plate versatility deficiency, and the easy high-altitude of original jig comes off, and jeopardizes workmen's safety.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of live line working jig is provided, it is simple in structure, and is easy to install, has improved the insulation combinational gap, has avoided stress to concentrate, and has increased versatility, safe and reliable.
According to technical scheme provided by the invention, described live line working jig, jig and back jig before comprising; An end of jig is provided with first mounting groove before described, and preceding jig forms first bend corresponding to the end that first mounting groove is set; One end of described back jig is provided with second mounting groove, and back jig forms second bend corresponding to the end that second mounting groove is set; Back jig is provided with the 3rd mounting groove corresponding to the other end that second mounting groove is set, back jig is concaved with the connection chute corresponding to the end that the 3rd mounting groove is set, connect the both sides that chute and the 3rd mounting groove lay respectively at the back jig, and the connection chute is connected with the bottom land of the 3rd mounting groove; Be provided with the hydraulic cylinder slide block in the described connection chute.
Described hydraulic cylinder slide block is circular-arc corresponding to being embedded at the end that connects in the chute, and the end shape of the shape of described connection chute and hydraulic cylinder slide block matches; The hydraulic cylinder slide block can slide in connecting chute.
Described hydraulic cylinder slide block is provided with the hydraulic tensioning bar corresponding to being embedded at the end that connects in the chute, and described hydraulic tensioning bar distributes along the axis of hydraulic cylinder slide block.
Described hydraulic cylinder slide block is provided with hydraulic pressure load instrument corresponding to the other end that the hydraulic tensioning bar is set, and described hydraulic pressure load instrument links to each other with the hydraulic tensioning bar.Jig all is the fish belly type with the back jig before described.
Jig played Hanging roller before the center of jig was provided with before described, described before jig play Hanging roller and first crooked position in the same side; Jig rose on the Hanging roller installation sheet before jig played Hanging roller and plays the Hanging roller main shaft and be installed in by preceding jig before described, described before jig play the Hanging roller installation sheet and preceding jig is fixedly connected.
The center of described back jig is provided with the back jig and plays Hanging roller, and described back jig plays Hanging roller and second crooked position in the same side; Described back jig plays Hanging roller and plays the Hanging roller main shaft by the back jig and be installed in the back jig and rise on the Hanging roller installation sheet, and described back jig plays the Hanging roller installation sheet and is fixedly connected with the back jig.
Described hydraulic tensioning bar is provided with the insulated pulling rod corresponding to the other end that links to each other with the hydraulic cylinder slide block, one end and the hydraulic tensioning bar of described insulated pulling rod are hinged, and the other end of described insulated pulling rod links to each other corresponding to the other end that first bend is set with preceding jig.
Described first bend and second bend all are fishhook-type.Jig link slot before jig is provided with corresponding to the other end that first mounting groove is set before described, the axis of described preceding jig link slot and the axis of first mounting groove are located along the same line.
Advantage of the present invention: an end of preceding jig is provided with first mounting groove, preceding jig forms first bend corresponding to the end that first mounting groove is set, preceding jig is installed on the first gold utensil set square by first mounting groove, and utilizes first bend and the corresponding cooperation of the first gold utensil set square; One end of back jig is provided with second mounting groove, back jig forms second bend corresponding to the end that second mounting groove is set, back jig is installed on the second gold utensil set square by second mounting groove, and utilizes second bend and the corresponding cooperation of the second gold utensil set square; Back jig links to each other by the insulated pulling rod with preceding jig, also be provided with hydraulic pressure load instrument on the back jig, hydraulic pressure load instrument has enlarged the clearance for insulation between the insulation combination by the corresponding cooperation of preceding jig, back jig and insulated pulling rod, attachment security is reliable simultaneously, difficult drop-off; Before being delivered to by the insulated pulling rod, the active force of hydraulic pressure load instrument on jig and the back jig, the porcelain vase string between the first gold utensil set square and the second gold utensil set square is changed under charged effect, and simple in structure, easy to install, safe and reliable.
Description of drawings
Fig. 1 is user mode figure of the present invention.
Fig. 2 is the stereogram of jig behind the present invention.
Fig. 3 is the structural representation of jig behind the present invention.
Fig. 4 is the upward view of Fig. 3.
Fig. 5 is the structural representation of jig body behind the present invention.
Fig. 6 is the structural representation of jig before the present invention.
Fig. 7 is the vertical view of Fig. 6.
Embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
As Fig. 1 ~ shown in Figure 7: jig 1 before the present invention includes, back jig 2, the first gold utensil set square 3, insulated pulling rod 4, jointed shaft 5, hydraulic tensioning bar 6, the second gold utensil set square 7, hydraulic pressure load instrument 8, connector 9, second mounting groove 10, second bend 11, back jig plays Hanging roller installation sheet 12, back jig plays Hanging roller 13, back jig plays Hanging roller main shaft 14, hydraulic cylinder slide block 15, location division 16, connect chute 17, the 3rd mounting groove 18, first bend 19, loss of weight groove 20, preceding jig plays Hanging roller 21, connecting hole 22, preceding jig plays Hanging roller main shaft 23, preceding jig plays Hanging roller installation sheet 24, first mounting groove 25 and preceding jig link slot 26.
As shown in Figure 6 and Figure 7: be the structural representation of jig before the present invention 1.Jig 1 is the fish belly type before described, one end of preceding jig 1 is provided with first mounting groove 25, described first mounting groove 25 distributes along the axis of preceding jig 1, preceding jig 1 forms first bend 19 corresponding to the end that first mounting groove 25 is set, described first bend 19 is fishhook-type, described first mounting groove 25 extends at the center of jig 1 forward from the end of first bend 19, first bend 19 is divided into the two halves of symmetrical distribution.Jig link slot 26 before preceding jig 1 is provided with corresponding to the other end that first mounting groove 25 is set, the axis of the described preceding jig link slot 26 and first mounting groove 25 is located along the same line.Preceding jig 1 is provided with connecting hole 22, the perpendicular distribution of axis of the axis of described connecting hole 22 and preceding jig link slot 26 corresponding to jig link slot 26 corresponding side plates before being provided with.
Jig played Hanging roller 21 before the center of jig 1 was provided with before described, described before jig play the same side that Hanging roller 21 and first bend 19 are positioned at preceding jig 1.Jig played 24 of Hanging roller installation sheets before jig played Hanging roller 21 and plays Hanging roller main shaft 23 and be installed in by preceding jig before described, described before jig play Hanging roller installation sheet 24 and be symmetrically distributed, preceding jig plays Hanging roller installation sheet 24 and is fixedly connected with preceding jig 1.Before jig rise Hanging roller 21 can relative to before jig play Hanging roller main shaft 23 and rotates, play Hanging roller 21 by carrying heavier article by preceding jig.Also be concaved with loss of weight groove 20 on the jig 1 before described, the weight of jig 1 before being used to alleviate.
As Fig. 2 ~ shown in Figure 5: be the structural representation of jig behind the present invention 2.Described back jig 2 also is the fish belly type, one end of back jig 2 is provided with second mounting groove 10, back jig 2 forms second bend 11 corresponding to the end that second mounting groove 10 is set, described second mounting groove 10 extends the center of jig 2 backward from the end of second bend 11, and second mounting groove 10 is divided into second bend 11 two halves of symmetrical distribution; Second bend 11 is fishhook-type.Back jig 2 is provided with the 3rd mounting groove 18 corresponding to the other end end that second mounting groove 10 is set, and the axis of the axis of described the 3rd mounting groove 18 and second mounting groove 10 is located along the same line.Back jig 2 also is provided with corresponding to the end that the 3rd mounting groove 18 is set and connects chute 17, and described connection chute 17 and the 3rd mounting groove 18 lay respectively at the both sides of back jig 2, connect chute 17 and are connected with the bottom land of the 3rd mounting groove 18.Described connection chute 17 parallels distribution with the 3rd mounting groove 18, and connection chute 17 is connected with the 3rd mounting groove 18.Connect the same side that the chute 17 and second bend 11 are positioned at back jig 2.
Be provided with hydraulic cylinder slide block 15 in the described connection chute 17, an end of described hydraulic cylinder slide block 15 is embedded in and connects in the chute 17; The described hydraulic cylinder slide block 15 and second bend 11 are positioned at the same side of back jig 2.Hydraulic cylinder slide block 15 is provided with location division 16 corresponding to being embedded in the end that connects in the chute 17, and described location division 16 is circular-arc.The notch that connects chute 17 forms the slide block slide rail, the shape of described slide block slide rail is consistent with the shape of the location division 16 of hydraulic cylinder slide block 15, described location division 16 can be embedded in the slide block slide rail, and slide along the slide block slide rail, thereby the end shape that connects chute 17 shapes and hydraulic cylinder slide block 15 is matched, hydraulic cylinder slide block 15 can slide in connecting chute 17, and hydraulic cylinder slide block 15 has a relative degree of freedom in connecting chute 17, guarantees that hydraulic cylinder slide block 15 can not skid off outside the connection chute 17.Hydraulic cylinder slide block 15 is positioned at when connecting chute 17, and hydraulic cylinder slide block 15 is the center with the line that connects chute 17 and the 3rd mounting groove 18 centers, and carries out ± 7 ° slip in both sides, described center; When hydraulic cylinder slide block 15 slides, can adjust the active force of jig 1 and back jig 2 before 8 pairs of the hydraulic pressure load instruments.
Hydraulic cylinder slide block 15 is provided with hydraulic tensioning bar 6 corresponding to being embedded in the end that connects in the chute 17, and described hydraulic tensioning bar 6 distributes along the axis of hydraulic cylinder slide block 15; Hydraulic tensioning bar 6 passes the 3rd mounting groove 18 corresponding to the other end that links to each other with hydraulic cylinder slide block 15.Hydraulic cylinder slide block 15 is provided with hydraulic pressure load instrument 5 corresponding to the other end that hydraulic tensioning bar 6 is set, and described hydraulic pressure load instrument 5 links to each other corresponding to the end with hydraulic cylinder slide block 15 with hydraulic tensioning bar 6; Described hydraulic pressure load instrument 5 can drive the end of hydraulic tensioning bar 6 and stretch in hydraulic cylinder slide block 15.Hydraulic tensioning bar 6 is provided with connector 9 corresponding to the other end that links to each other with hydraulic cylinder slide block 15, and described connector 9 is provided with the stretching connecting rod, is used for hydraulic tensioning bar 6 is linked to each other with insulated pulling rod 4.
Back jig 2 is provided with the back jig and plays Hanging roller 13, and described back jig plays the center that Hanging roller 13 is positioned at back jig 2, and the back jig play Hanging roller 13 and be positioned at second bend 11 after the same side of jig 2.Described back jig plays Hanging roller 13 and plays Hanging roller main shaft 14 by the back jig and be installed in the back jig and play 12 of Hanging roller installation sheets, and the end that described back jig plays Hanging roller installation sheet 12 fixes with back jig 2; Back jig plays Hanging roller 13 can play rotation on the Hanging roller main shaft 14 at the back jig, can easily carry heavier article thereby play Hanging roller 13 by the back jig.
As shown in Figure 1: be the user mode figure of jig before the present invention 1 with back jig 2.During use, preceding jig 1 links to each other with the first gold utensil set square 3 corresponding to the end that first mounting groove 25 and first bend 19 are set; First mounting groove 25 of preceding jig 1 is stuck on the first gold utensil set square 3, first bend 19 links to each other with fastening bolt on the first gold utensil set square 3, thereby preceding jig 1 can be installed on the first gold utensil set square 3, the preceding jig on the simultaneously preceding jig 1 plays the outside that Hanging roller 21 is positioned at preceding jig 1.Back jig 2 links to each other with the second gold utensil set square 7 corresponding to the end that second mounting groove 10 and second bend 11 are set, second mounting groove 10 of back jig 2 is stuck on the second gold utensil set square 7, the corresponding cooperation of fastening bolt on second bend 11 and the second gold utensil set square 7, thus back jig 2 is installed on the second gold utensil set square 7.Described first gold utensil set square 3 and 7 of the second gold utensil set squares are provided with some porcelain vase strings.Preceding jig 1 and 2 of the jigs in back are provided with insulated pulling rod 4, bearing pin on one end of described insulated pulling rod 4 and the preceding jig 1 in the connecting hole 22 is hinged, the other end of insulated pulling rod 4 is hinged by the connector 9 of jointed shaft 5 with hydraulic tensioning bar 6 ends, thereby preceding jig 1 is linked to each other with back jig 2.During work, actuating hydraulic pressure load instrument 8, the pulling force of described hydraulic pressure load instrument 8 stretches by 6 pairs of insulated pulling rods 4 of hydraulic tensioning bar.Because the two ends of insulated pulling rod 4 link to each other preceding jig 1 with back jig 2, when hydraulic pressure load instrument 8 stretches by insulated pulling rod 4, described insulated pulling rod 4 can transmit corresponding active force to preceding jig 1 and back jig 2, active force on preceding jig 1 and the back jig 2 acts on respectively on the first gold utensil set square 3 and the second gold utensil set square 7, thereby can act on the porcelain vase string of 7 of the first gold utensil set square 3 and the second gold utensil set squares, can finish under charged situation, to the replacing of porcelain vase string.When the porcelain vase string of 7 of the first gold utensil set square 3 and the second gold utensil set squares change finish after, hydraulic pressure load instrument 8 is installed in the porcelain vase string on the first gold utensil set square 3 and the second gold utensil set square 7 by insulated pulling rod 4 transfer function power.
Described hydraulic pressure load instrument 8 is installed on the hydraulic cylinder slide block 15 of back jig 2, and hydraulic cylinder slide block 15 links to each other preceding jig 1 by hydraulic tensioning bar 6 and insulated pulling rod 4 with back jig 2, has solved the problem of insulation combinational gap deficiency.Connection chute 17 on the back jig 2 adopts arc surface to be connected with 15 of hydraulic cylinder slide blocks, by the slip of hydraulic cylinder slide block 15 in connecting chute 17, realizes hydraulic pressure load instrument 8 slip of back jig 2 relatively; Because hydraulic cylinder slide block 15 is that the center can be realized ± 7 ° rotation with the line at connection chute 17 and 18 centers of the 3rd mounting groove in connecting chute 17, thereby hydraulic pressure load instrument 8 can be realized ± 7 ° rotation.When hydraulic pressure load instrument 8 carries out fine motion, realize that the tractive effort direction of hydraulic pressure load instrument 8 and hydraulic tensioning bar 6 is floated, can solve the problem of automatic adjusting tractive effort linearization(-sation), the active force before having guaranteed to act on jig 1 and the back jig 2.Second bend 11 on first bend 19 on the preceding jig 1, the back jig 2 is stuck on the first gold utensil set square 3, the second gold utensil set square 7, and link to each other with corresponding fastening bolt on the first gold utensil set square 3 and the second gold utensil set square 7, guaranteed the reliability that preceding jig 1 is connected with back jig 2.Before jig 1 link to each other by insulated pulling rod 4 with back jig 2, difficult drop-offs after jig 1 and 2 installations of back jig before making, that guarantees to use is safe and reliable.
Claims (10)
1. a live line working jig is characterized in that: comprise preceding jig (1) and back jig (2); An end of jig (1) is provided with first mounting groove (25) before described, and preceding jig (1) forms first bend (19) corresponding to the end that first mounting groove (25) is set; One end of described back jig (2) is provided with second mounting groove (10), and back jig (2) forms second bend (11) corresponding to the end that second mounting groove (10) is set; Back jig (2) is provided with the 3rd mounting groove (18) corresponding to the other end that second mounting groove (10) is set, back jig (2) is concaved with corresponding to the end that the 3rd mounting groove (18) is set and connects chute (17), connect the both sides that chute (17) and the 3rd mounting groove (18) lay respectively at back jig (2), and connection chute (17) is connected with the bottom land of the 3rd mounting groove (18); Be provided with hydraulic cylinder slide block (15) in the described connection chute (17).
2. live line working jig according to claim 1, it is characterized in that: described hydraulic cylinder slide block (15) is circular-arc corresponding to being embedded at the end that connects in the chute (17), and the end shape of the shape of described connection chute (17) and hydraulic cylinder slide block (15) matches; Hydraulic cylinder slide block (15) can slide in connecting chute (17).
3. live line working jig according to claim 1 and 2, it is characterized in that: described hydraulic cylinder slide block (15) is provided with hydraulic tensioning bar (6) corresponding to being embedded at the end that connects in the chute (17), and described hydraulic tensioning bar (6) distributes along the axis of hydraulic cylinder slide block (15).
4. live line working jig according to claim 3, it is characterized in that: described hydraulic cylinder slide block (15) is provided with hydraulic pressure load instrument (8) corresponding to the other end that hydraulic tensioning bar (6) is set, and described hydraulic pressure load instrument (8) links to each other with hydraulic tensioning bar (6).
5. live line working jig according to claim 1 is characterized in that: jig (1) all is the fish belly type with back jig (2) before described.
6. live line working jig according to claim 1 is characterized in that: jig played Hanging roller (21) before the center of jig (1) was provided with before described, and described preceding jig plays Hanging roller (21) and is positioned at the same side with first bend (19); Jig rose on the Hanging roller installation sheet (24) before jig played Hanging roller (21) and plays Hanging roller main shaft (23) and be installed in by preceding jig before described, described before jig play Hanging roller installation sheet (24) and preceding jig (1) and be fixedly connected.
7. live line working jig according to claim 1 is characterized in that: the center of described back jig (2) is provided with the back jig and plays Hanging roller (13), and described back jig plays Hanging roller (13) and is positioned at the same side with second bend (11); Described back jig plays Hanging roller (13) and plays Hanging roller main shaft (14) by the back jig and be installed in the back jig and rise on the Hanging roller installation sheet (12), and described back jig plays Hanging roller installation sheet (12) and is fixedly connected with back jig (2).
8. live line working jig according to claim 3, it is characterized in that: described hydraulic tensioning bar (6) is provided with insulated pulling rod (4) corresponding to the other end that links to each other with hydraulic cylinder slide block (15), one end of described insulated pulling rod (4) and hydraulic tensioning bar (6) are hinged, and the other end of described insulated pulling rod (4) links to each other corresponding to the other end that first bend (19) is set with preceding jig (1).
9. live line working jig according to claim 1 is characterized in that: described first bend (19) all is fishhook-type with second bend (11).
10. live line working jig according to claim 1, it is characterized in that: jig link slot (26) before jig (1) is provided with corresponding to the other end that first mounting groove (25) is set before described, the axis of described preceding jig link slot (26) and the axis of first mounting groove (25) are located along the same line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010531949 CN102005706A (en) | 2010-11-04 | 2010-11-04 | Clamping apparatus of live line tools |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010531949 CN102005706A (en) | 2010-11-04 | 2010-11-04 | Clamping apparatus of live line tools |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102005706A true CN102005706A (en) | 2011-04-06 |
Family
ID=43812859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010531949 Pending CN102005706A (en) | 2010-11-04 | 2010-11-04 | Clamping apparatus of live line tools |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102005706A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163823A (en) * | 2011-01-25 | 2011-08-24 | 湖北省超能超高压电力科技开发有限公司 | Ceramic rod type insulator replacing tool |
| CN102664364A (en) * | 2012-03-21 | 2012-09-12 | 浙江省电力公司培训中心 | Universal broadsword fixture |
| CN105356398A (en) * | 2015-12-01 | 2016-02-24 | 温州电力设计有限公司 | Overhead circuit shearing force type strain hardware |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000059936A (en) * | 1998-08-10 | 2000-02-25 | Chubu Electric Power Co Inc | Insulator replacing device for two-string strain- insulator apparatus |
| CN201174540Y (en) * | 2008-03-06 | 2008-12-31 | 福建省厦门电业局 | Hanging type insulator string electrification altering apparatus interlocked with a two-connection plate |
| CN101699678A (en) * | 2009-10-29 | 2010-04-28 | 江苏省电力公司无锡供电公司 | Hydraulic wire grip |
| CN201838936U (en) * | 2010-11-04 | 2011-05-18 | 江苏省电力公司无锡供电公司 | Live operation tool fixture |
-
2010
- 2010-11-04 CN CN 201010531949 patent/CN102005706A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000059936A (en) * | 1998-08-10 | 2000-02-25 | Chubu Electric Power Co Inc | Insulator replacing device for two-string strain- insulator apparatus |
| CN201174540Y (en) * | 2008-03-06 | 2008-12-31 | 福建省厦门电业局 | Hanging type insulator string electrification altering apparatus interlocked with a two-connection plate |
| CN101699678A (en) * | 2009-10-29 | 2010-04-28 | 江苏省电力公司无锡供电公司 | Hydraulic wire grip |
| CN201838936U (en) * | 2010-11-04 | 2011-05-18 | 江苏省电力公司无锡供电公司 | Live operation tool fixture |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163823A (en) * | 2011-01-25 | 2011-08-24 | 湖北省超能超高压电力科技开发有限公司 | Ceramic rod type insulator replacing tool |
| CN102664364A (en) * | 2012-03-21 | 2012-09-12 | 浙江省电力公司培训中心 | Universal broadsword fixture |
| CN105356398A (en) * | 2015-12-01 | 2016-02-24 | 温州电力设计有限公司 | Overhead circuit shearing force type strain hardware |
| CN105356398B (en) * | 2015-12-01 | 2017-08-22 | 温州电力设计有限公司 | A kind of overhead transmission line shearing-force type strain hardware fitting |
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Application publication date: 20110406 |