CN114123030A - Replacement tool and replacement method for triple strain insulator string - Google Patents
Replacement tool and replacement method for triple strain insulator string Download PDFInfo
- Publication number
- CN114123030A CN114123030A CN202111406073.7A CN202111406073A CN114123030A CN 114123030 A CN114123030 A CN 114123030A CN 202111406073 A CN202111406073 A CN 202111406073A CN 114123030 A CN114123030 A CN 114123030A
- Authority
- CN
- China
- Prior art keywords
- clamp
- insulator
- string
- cross
- cross arm
- Prior art date
- 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.)
- Granted
Links
- 239000012211 strain insulator Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 8
- 239000012212 insulator Substances 0.000 claims abstract description 59
- 238000009413 insulation Methods 0.000 claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 206010015856 Extrasystoles Diseases 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
Landscapes
- Electric Cable Installation (AREA)
Abstract
The utility model provides a strain insulator string replacement instrument of trigeminy for realize that strain insulator string is hung to trigeminy's whole cluster is demolishd, main fixture includes cross arm end fixture, wire end fixture, insulating pull rod, hydraulic pressure turn-buckle, as main atress instrument for bear wire tension. The auxiliary tool comprises an auxiliary closed type clamp rear clamp, an auxiliary closed type clamp front clamp, a lengthened double-end lead screw, an extension joint, a special insulation pulley and an insulation rope, and is used for being matched with a main clamp to realize replacement of the whole string of insulators. The invention solves the technical problem that the whole string of the triple strain insulator string cannot be replaced, and has simple operation and high replacement efficiency.
Description
Technical Field
The invention relates to the technical field of extra-high voltage transmission line maintenance, in particular to a replacement tool and a replacement method for a triple strain insulator string.
Background
The safe and stable operation of the ultra-high voltage transmission line is related to the safety of a power grid. When the power grid normally operates, low-value and zero-value insulators are inevitable, replacement of the low-value and zero-value insulators is an important component of unit safety maintenance work, and the insulator replacement fixture and the operation method are particularly important.
At present, for 420kN triple strain insulator strings (as shown in figures 1 and 2) of a +/-800 kV extra-high voltage transmission line, because the insulator strings are too long, each insulator string is provided with 74 insulators, the length of each insulator string is 15170mm, and a total length of the insulator strings is 17100 mm. When low-value and zero-value insulators appear, the operation method of replacing the single insulator by the closed fixture is mainly adopted, and the insulator replacement operation is complex and the replacement efficiency is low due to the fact that a whole string of insulator replacement tools are not available.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a replacement tool for a triple strain insulator string of 420kN, and solves the technical problem that the whole string of insulators of the triple strain insulator string cannot be replaced.
The replacement tool comprises a main fixture and an auxiliary fixture, and the main fixture and the auxiliary fixture are matched with a hardware fitting cross arm end and a wire end of the insulator string to realize the whole string dismantling of the triple three-hanging strain insulator string.
Preferably, the insulator string hardware cross arm end includes: the insulator string hardware fitting wire end comprises an insulator, an equalizing ring, a socket head hanging plate, a cross hanging plate, a parallel hanging plate bolt and a parallel hanging plate.
Preferably, the main fixture comprises a cross arm end fixture, a wire end fixture, an insulating pull rod and a hydraulic tightener, wherein the cross arm end fixture is connected with the wire end fixture sequentially through the hydraulic tightener and the insulating pull rod and serves as a main stress tool for bearing the tension of the wire.
Preferably, the auxiliary tool comprises an auxiliary closed type clamp rear clamp, an auxiliary closed type clamp front clamp, a lengthened double-end lead screw, an extension joint, a special insulation pulley and an insulation rope, and is used for being matched with a main clamp to realize replacement of the whole string of insulators.
Preferably, the cross arm end clamp is an airfoil-shaped clamp and comprises a central clamping groove and two wing portions, the central clamping groove is matched with the cross arm side traction plate, and the two wing portions are symmetrically distributed on two sides of the central portion and connected with the hydraulic tightener.
Preferably, the wire end clamp is a turning plate clamp, and comprises a turning plate clamp body, a rotating shaft, a turning plate and a groove part, wherein the turning plate surrounds the rotating shaft and can be turned, and the groove part is located at the center of the turning plate clamp body and close to the rotating shaft and is used for being connected with the parallel hanging plate bolt, the parallel hanging plate and the cross hanging plate in a matching manner.
Preferably, the special insulation pulley comprises a bowl head pulley and a cross plate pulley.
Further, the invention also provides a replacement method of the triple strain insulator string, which comprises the following steps:
s1: the auxiliary closed type clamp front clamp is arranged on a sixth insulator steel cap at the end of a lead, the auxiliary closed type clamp front clamp and an extension joint are connected through a lengthened double-end lead screw, the extension joint is connected with a connecting lug of the lead end clamp, and the lengthened double-end lead screw is pre-tightened;
s2: mounting an auxiliary closed type card rear card on a 2 nd insulator steel cap at the cross arm end, and mounting U-shaped hanging rings at two ends of the auxiliary closed type card rear card;
s3: the cross arm end clamp is connected with the lead end clamp through the hydraulic tightener and the insulating pull rod in sequence, and the hydraulic tightener is tightened to enable the lead end clamp, the cross arm end clamp and the insulating pull rod to be stressed until the insulator string is loosened, and the load is transferred to the insulating pull rod;
s4: tightening the lengthened double-end lead screw, and sequentially removing the 1 st insulator to the 5 th insulator at the end of the lead;
s5: a bowl head pulley and a cross plate pulley form a pulley group by using an insulating rope and are lifted to the side of a lead, the bowl head pulley 21 is connected with a 6 th insulator, the cross plate pulley is matched with a cross hanging plate, and the insulating rope passes through a steering pulley arranged on a cross arm of an iron tower and is guided to the ground;
s6: another insulating rope is threaded on the U-shaped hanging ring, the connection between the first insulator at the cross arm end and the hardware fitting is disconnected, the insulating rope is gradually loosened by the aid of the pulley block, the insulator string is guided to the ground, and therefore the whole string of the triple-string three-string strain insulator string is detached.
The invention solves the technical problem that the whole string of the triple strain insulator string cannot be replaced, and compared with the prior art, the replacement operation is simple and the replacement efficiency is higher.
Drawings
Fig. 1 is a front view of a 420kN triple strain insulator string.
Fig. 2 is a top view of a 420kN triple strain insulator string.
Fig. 3 is a mounting diagram a of the replacing tool for the 420kN triple strain insulator string according to the invention.
Fig. 4 is a mounting diagram B of the replacing tool for the 420kN triple strain insulator string according to the invention.
Fig. 5 is a front view of the cross arm end wing clip of the present invention.
Fig. 6 is a side-sectional view of the cross-arm end wing clip of the present invention.
Fig. 7 is a schematic view of the open state of the wire end flip-flop card of the present invention.
Fig. 8 is a schematic view of the closed state of the wire end flap card of the present invention.
Fig. 9 is a schematic view of the closed state of the wire end flap card of the present invention-the coupled position.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Fig. 1 and 2 show assembling diagrams of a 420kN triple three-hanging strain insulator string hardware fitting of a +/-800 kV line, the distance between insulator strings is 650mm, each string of insulator strings is provided with 74 420kN insulators except a connecting hardware fitting, and the length is 15170 mm. The insulator connecting length is 205mm, and the porcelain skirt diameter is 400 mm.
As shown in fig. 1 and 2, the insulator string hardware cross arm end includes: the hitch plate 1, parallel link plate 6, insulator 2, insulator chain gold utensil wire end include: insulator 2, grading ring 3, socket link plate 4, cross link plate 5, parallel link plate bolt 6, parallel link plate 7.
As shown in fig. 3 and 4, the invention provides a triple strain insulator string replacing tool, which comprises a main fixture and an auxiliary tool.
Wherein the main fixture includes: the cross arm end clamp 8, the wire end clamp 16, the insulating pull rod 10 and the hydraulic tightener 9 are used as main stress tools and used for bearing the tension of the wires.
The cross arm end clamp 8 is a wing type clamp, and as shown in fig. 5 and 6, includes a central clamping groove 32 and two wing parts 33. The central part clamping groove 32 is matched with the cross arm side traction plate 1 and is connected with the cross arm side traction plate by a bolt 23 and a nut 24, and the two wing parts 33 are symmetrically distributed on two sides of the central part and are used for being connected with the hydraulic tightener 9.
The wire end clamp 16 is a flap clamp, as shown in fig. 7, 8 and 9, and includes a flap clamp main body 25, a rotating shaft 26, a flap 27 and a groove portion 34, the flap 27 can be turned around the rotating shaft 26, and the groove portion 34 is located at the center of the flap clamp main body and at the position of the flap 27 close to the rotating shaft 26, and is used for being connected with the parallel hanging plate bolt 6, the parallel hanging plate 7 and the cross hanging plate 5 in a matching manner.
Fig. 7 shows the open state of the wire end clamp, which can be opened by removing the nut 28, opening the flap 27 and fitting the body groove 34 over the hexagonal head of the bolt 6.
Figure 8 shows the closed position of the wire end clamp with the flap 27 closed, the flap recess portion 34 over the hex head of the bolt 6 and the nut 28 tightened to close the wire end clamp.
The cross arm end clamp 8 is connected with the lead end clamp 16 sequentially through the hydraulic tightener 9 and the insulating pull rod 10 to form a main stress clamp.
As shown in fig. 9, the main body 25 of the wire end clamp 16 has coupling lugs 31 at both ends.
Referring to fig. 3-4, the auxiliary tool comprises an auxiliary closed type clamp rear clamp 12, an auxiliary closed type clamp front clamp 13, a lengthened double-end screw 14, a lengthened joint 15, a special insulation pulley and an insulation rope, and is used for matching with the main clamp to realize replacement of the whole string of insulators. The special insulation pulley comprises a bowl head pulley 21 and a cross plate pulley 20.
When the insulator string needs to be replaced, the auxiliary closed type front clamp 13 is installed on the sixth insulator steel cap at the wire end, the auxiliary closed type front clamp 13 and the extension joint 15 are connected through the lengthened double-head screw rod 14, the extension joint 15 is connected with the connection lug 31 of the wire end clamp, and the lengthened double-head screw rod is pre-tightened. The auxiliary closed type clamp rear clamp 12 is installed on the 2 nd insulator steel cap at the cross arm end, and the U-shaped hanging ring 11 is installed at the two ends of the rear clamp.
The cross arm end clamp 8 is connected with the wire end clamp 16 sequentially through the hydraulic tightener 9 and the insulation pull rod 10, the hydraulic tightener 9 is tightened, the wire end clamp 16, the cross arm end clamp 8 and the insulation pull rod 10 are stressed until the insulator string is loosened, and the load is transferred to the insulation pull rod 10. And (4) tightening the lengthened double-end screw rod 14, and sequentially removing the insulators from the first insulator to the fifth insulator at the end of the lead.
A bowl head pulley 21 and a cross plate pulley 20 form a pulley group by an insulating rope and are lifted to the side of a lead, the bowl head pulley 21 is connected with a sixth insulator, the cross plate pulley 20 is matched with a cross hanging plate 5, and the insulating rope passes through a steering pulley arranged on a cross arm of an iron tower and is guided to the ground (the steering pulley and the cross arm of the iron tower are not shown in the figure).
Another 1 insulating rope is threaded on the U-shaped hanging ring 11, the connection between the first insulator at the cross arm end and the hardware fitting is disconnected, the insulating rope is gradually loosened by using a pulley group consisting of a bowl head pulley 21 and a cross plate pulley 20, and the insulator string is guided to the ground, so that the whole string of the triple three-string strain insulator string is dismantled.
While the best mode for carrying out the invention has been described in detail and illustrated in the accompanying drawings, it is to be understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the scope of the invention should be determined by the appended claims and any changes or modifications which fall within the true spirit and scope of the invention should be construed as broadly described herein.
Claims (10)
1. The utility model provides a triple strain insulator string replacement tool which characterized in that, the replacement tool includes main fixture and supplementary fixture, cooperatees through main fixture and supplementary fixture and insulator string gold utensil cross arm end and wire end, realizes that triple strain insulator string's whole cluster is demolishd.
2. The tool of claim 1, wherein the insulator string hardware cross-arm end comprises: traction plate (1), parallel link plate (6), insulator (2), insulator chain gold utensil wire end includes: the insulator (2), the grading ring (3), the socket hanging plate (4), the cross hanging plate (5), the parallel hanging plate bolt (6) and the parallel hanging plate (7).
3. Tool according to claim 2, characterized in that the main clamps comprise a cross arm end clamp (8), a wire end clamp (16), an insulated pull rod (10), a hydraulic turnbuckle (9).
4. The tool of claim 3 wherein the cross arm end clamps are coupled to the wire end clamps in sequence through the hydraulic turnbuckles and the insulated pull bars as a primary force-bearing tool for carrying wire tension.
5. The tool according to claim 4, characterized in that the auxiliary tool comprises an auxiliary closed type clamp rear clamp (12), an auxiliary closed type clamp front clamp (13), an elongated double-headed screw (14), an elongated joint (15), a special insulation pulley and an insulation rope, and is used for matching with a main clamp to realize the replacement of the whole string of insulators.
6. Tool according to claim 5, characterized in that the cross arm end clamps (8) are wing clamps comprising a central part clamping slot (32) cooperating with the cross arm side traction plate (1) and two wing parts (33) symmetrically distributed on both sides of the central part for coupling with the hydraulic tightener (9).
7. The tool according to claim 6, wherein the wire end clamp (16) is a flap clamp comprising a flap clamp body (25), a pivot (26), a flap (27) and a groove portion (34).
8. Tool according to claim 7, characterized in that the flap (27) is turnable around the axis of rotation (26), and that the groove (34) is located in the centre of the flap body (25) and close to the axis of rotation for co-operating connection with the parallel flap bolts (6), the parallel flaps (7) and the cross flaps (5).
9. Tool according to claim 8, characterized in that the special insulation trolley comprises a bowl head trolley (21) and a cross plate trolley (20).
10. A method of replacing a triple strain insulator string, using the tool of claim 9, the method comprising the steps of:
s1: the auxiliary closed type clamp front clamp (13) is arranged on a sixth insulator steel cap at the end of the lead, the auxiliary closed type clamp front clamp (13) and an extension joint (15) are connected through a lengthened double-end lead screw (14), the extension joint (15) is connected with a connecting lug (31) of the lead end clamp, and the lengthened double-end lead screw is pre-tightened;
s2: installing an auxiliary closed type rear clamp (12) on the 2 nd insulator steel cap at the cross arm end, and installing U-shaped hanging rings (11) at two ends of the auxiliary closed type rear clamp;
s3: the cross arm end fixture (8) is connected with the lead end fixture (16) sequentially through the hydraulic tightener (9) and the insulating pull rod (10), the hydraulic tightener is tightened, so that the lead end fixture, the cross arm end fixture and the insulating pull rod are stressed until the insulator string is loosened, and the load is transferred to the insulating pull rod (10);
s4: tightening and lengthening a double-end screw rod (14), and sequentially removing insulators from the 1 st to the 5 th at the ends of the wires;
s5: a bowl head pulley (21) and a cross plate pulley (20) form a pulley group by an insulating rope and are lifted to the side of a lead, the bowl head pulley (21) is connected with a 6 th insulator, the cross plate pulley (20) is matched with a cross hanging plate (5), and the insulating rope passes through a steering pulley arranged on a cross arm of an iron tower and is guided to the ground;
s6: another insulating rope is threaded on the U-shaped hanging ring (11), the connection between the first insulator at the cross arm end and the hardware fitting is disconnected, the insulating rope is gradually loosened by the aid of the pulley block, the insulator string is guided to the ground, and therefore the whole string of the triple three-string strain insulator string is detached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111406073.7A CN114123030B (en) | 2021-11-24 | 2021-11-24 | Tool and method for replacing triple strain insulator string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111406073.7A CN114123030B (en) | 2021-11-24 | 2021-11-24 | Tool and method for replacing triple strain insulator string |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114123030A true CN114123030A (en) | 2022-03-01 |
| CN114123030B CN114123030B (en) | 2024-02-23 |
Family
ID=80372071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111406073.7A Active CN114123030B (en) | 2021-11-24 | 2021-11-24 | Tool and method for replacing triple strain insulator string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114123030B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114865524A (en) * | 2022-04-13 | 2022-08-05 | 云南电网有限责任公司曲靖供电局 | Wire side fixture for indirectly live replacement of 10kV line tension insulator and use method |
| RU223133U1 (en) * | 2023-10-31 | 2024-02-02 | Общество с ограниченной ответственностью "Газпром трансгаз Махачкала" | Wire tensioning device for replacing insulators |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163827A (en) * | 2011-01-30 | 2011-08-24 | 江苏捷凯电力器材有限公司 | Strain insulator string for multi-division transmission line |
| CN202050191U (en) * | 2011-05-03 | 2011-11-23 | 刘治勇 | Clamp for changing strain insulator string |
| CN202978103U (en) * | 2012-12-07 | 2013-06-05 | 湖南省电网建设公司 | Insulator fixture |
| CN106207850A (en) * | 2016-07-25 | 2016-12-07 | 国网福建省电力有限公司 | The operational method of charged for replacement holes duplex plate linear insulator chain |
| CN106410662A (en) * | 2016-09-13 | 2017-02-15 | 段宏 | Method for replacing two tension insulator strings of 220KV line in power failure |
| CN107425474A (en) * | 2017-08-22 | 2017-12-01 | 河南送变电工程公司 | For changing the device of strain insulator |
| KR101965973B1 (en) * | 2017-10-13 | 2019-04-04 | 한국전력공사 | The replacement devise of electric transmission tower insulator strings and method thereof |
-
2021
- 2021-11-24 CN CN202111406073.7A patent/CN114123030B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163827A (en) * | 2011-01-30 | 2011-08-24 | 江苏捷凯电力器材有限公司 | Strain insulator string for multi-division transmission line |
| CN202050191U (en) * | 2011-05-03 | 2011-11-23 | 刘治勇 | Clamp for changing strain insulator string |
| CN202978103U (en) * | 2012-12-07 | 2013-06-05 | 湖南省电网建设公司 | Insulator fixture |
| CN106207850A (en) * | 2016-07-25 | 2016-12-07 | 国网福建省电力有限公司 | The operational method of charged for replacement holes duplex plate linear insulator chain |
| CN106410662A (en) * | 2016-09-13 | 2017-02-15 | 段宏 | Method for replacing two tension insulator strings of 220KV line in power failure |
| CN107425474A (en) * | 2017-08-22 | 2017-12-01 | 河南送变电工程公司 | For changing the device of strain insulator |
| KR101965973B1 (en) * | 2017-10-13 | 2019-04-04 | 한국전력공사 | The replacement devise of electric transmission tower insulator strings and method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114865524A (en) * | 2022-04-13 | 2022-08-05 | 云南电网有限责任公司曲靖供电局 | Wire side fixture for indirectly live replacement of 10kV line tension insulator and use method |
| CN114865524B (en) * | 2022-04-13 | 2024-02-20 | 云南电网有限责任公司曲靖供电局 | Indirect method electrified replacement 10kV line tension insulator wire side clamp and use method |
| RU223133U1 (en) * | 2023-10-31 | 2024-02-02 | Общество с ограниченной ответственностью "Газпром трансгаз Махачкала" | Wire tensioning device for replacing insulators |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114123030B (en) | 2024-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114123030A (en) | Replacement tool and replacement method for triple strain insulator string | |
| CN101651308B (en) | Tension resistant four-serial string whole composite insulator replacing device | |
| CN103594968A (en) | Lifting device of multiple divided conductors of transmission tower | |
| CN107342553B (en) | Replacing fixture and replacing method for linear duplex V-string insulator | |
| CN203747299U (en) | Mountable and dismountable dual-purpose airfoil-profile clamping device | |
| CN114865524B (en) | Indirect method electrified replacement 10kV line tension insulator wire side clamp and use method | |
| CN202167813U (en) | Pre-twisted strain clamp | |
| CN114123028B (en) | Method for replacing triple strain insulator string | |
| CN210201444U (en) | Circuit breaking structure | |
| CN203135324U (en) | Frapping tool used for power transmission line maintenance | |
| CN206099164U (en) | Change combination tool of extra -high voltage with two dead end insulator of returning of tower with electricity | |
| CN109066456B (en) | Device and method for replacing insulator | |
| CN201509027U (en) | Entire quadruple string type strain composite insulator replacement device | |
| CN201210608Y (en) | Symmetric vibration preventing hammer for extra-high voltage transmission grid DC line | |
| CN209098084U (en) | Power transmission lines overhauling and construction and installation ground wire lifting device | |
| CN210224785U (en) | Fixture for replacing 220kV straight line single-string cross arm side insulator and hardware fitting by ground potential operation method | |
| CN103606849A (en) | Multi-bundled live conductor lifting device for transmission tower and special fixture of multi-bundled live conductor lifting device | |
| CN210053105U (en) | Simple tool for adjusting lead sag | |
| CN211351474U (en) | 66KV inner wedge type strain fast wire clamp fixture | |
| CN106340828A (en) | Special tool for replacing duplex stay wire and fittings of power transmission line | |
| CN206759003U (en) | A kind of suspension clamp | |
| CN111048267A (en) | Wind vibration resistant fixed suspension insulator string and working method thereof | |
| CN217159102U (en) | Line lifting device for aluminum tube type jumper main tube of ultra-high voltage transmission line and ultra-high voltage transmission line | |
| CN103219670B (en) | A kind of tune strain insulator-string automatic aligning fixture | |
| CN216530448U (en) | Live replacement strain insulator-string wire side gold utensil and adjustment wire arc specialized tool that hangs down |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |