CN114123030B - Tool and method for replacing triple strain insulator string - Google Patents
Tool and method for replacing triple strain insulator string Download PDFInfo
- Publication number
- CN114123030B CN114123030B CN202111406073.7A CN202111406073A CN114123030B CN 114123030 B CN114123030 B CN 114123030B CN 202111406073 A CN202111406073 A CN 202111406073A CN 114123030 B CN114123030 B CN 114123030B
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- Prior art keywords
- clamp
- insulator
- plate
- cross arm
- string
- 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.)
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- 239000012211 strain insulator Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 7
- 239000012212 insulator Substances 0.000 claims abstract description 64
- 238000009413 insulation Methods 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
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
Abstract
The utility model provides a triple strain insulator string change instrument for realize that the whole string of triple string strain insulator string is demolishd, main fixture includes cross arm end fixture, wire end fixture, insulating pull rod, hydraulic pressure turn-buckle, as main atress instrument, is used for bearing wire tension. The auxiliary tool comprises an auxiliary closed clamp rear clamp, an auxiliary closed clamp front clamp, a lengthened double-head screw rod, 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 insulator string of the triple tension 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 overhaul, in particular to a triple strain insulator string replacement tool and a replacement method thereof.
Background
The safe and stable operation of the ultra-high voltage transmission line is related to the safety of the power grid. When the power grid normally operates, the occurrence of low-value zero-value insulators is unavoidable, and the replacement work of the low-value zero-value insulators is an important component part of unit safety maintenance work, wherein the insulator replacement fixture and the operation method are particularly important.
At present, for 420kN triple strain insulator strings (shown in fig. 1 and 2) of an ultra-high voltage transmission line with the voltage of +/-800 kV, each insulator string is provided with 74 pieces of insulators due to the fact that the insulator strings are too long, the length is 15170mm, and the total length is 17100mm. When the low-value zero-value insulator appears, the operation method of replacing the single insulator by the closed fixture is mainly adopted, and the whole string of insulator replacing tools is not needed, so that the insulator replacing operation is complex, and the replacing efficiency is low.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a 420kN triple strain insulator string replacement tool, which solves the technical problem that the whole string of insulators of the triple strain insulator string cannot be replaced.
The invention particularly provides a replacement tool for a triple-connection strain insulator string, which comprises a main fixture and an auxiliary fixture, wherein the main fixture and the auxiliary fixture are matched with a cross arm end and a wire end of an insulator string hardware fitting to realize the whole string dismantling of the triple-connection strain insulator string.
Preferably, the insulator string hardware cross arm end includes: the hardware fitting wire end of the insulator string comprises an insulator, a grading ring, a bowl 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 wire tightener, wherein the cross arm end fixture is connected with the wire end fixture through the hydraulic wire tightener and the insulating pull rod in sequence and is used as a main stress tool for bearing the tension of a wire.
Preferably, the auxiliary tool comprises an auxiliary closed clamp rear clamp, an auxiliary closed clamp front clamp, a lengthened double-head screw rod, 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 clamp and comprises a central part clamping groove and two wing parts, wherein the central part clamping groove is matched with the cross arm side traction plate, and the two wing parts are symmetrically distributed on two sides of the central part and are used for being connected with the hydraulic tightener.
Preferably, the wire end clamp is a plate-turning clamp and comprises a plate-turning clamp main body, a rotating shaft, a plate-turning plate and a groove part, wherein the plate-turning plate can turn around the rotating shaft, and the groove part is positioned at the center of the plate-turning clamp main body and near the rotating shaft and is used for being matched and connected with a parallel hanging plate bolt, a parallel hanging plate and a cross hanging plate.
Preferably, the special insulation pulley comprises a bowl head pulley and a cross plate pulley.
Further, the invention also provides a method for replacing the triple strain insulator string, which comprises the following steps:
s1: the auxiliary closed type front clamp is arranged on a sixth insulator steel cap of the lead end, the auxiliary closed type front clamp and an extension joint are connected by a lengthening double-end lead screw, the extension joint is connected with a connecting lug of the lead end clamp, and the lengthening double-end lead screw is pre-tensioned;
s2: the auxiliary closed type rear clamp is arranged on a 2 nd insulator steel cap at the cross arm end, and U-shaped hanging rings are arranged at the two ends of the auxiliary closed type rear clamp;
s3: the cross arm end clamp is connected with the wire end clamp sequentially through the hydraulic wire tightener and the insulating pull rod, and the hydraulic wire tightener is tightened to enable the wire end clamp, the cross arm end clamp and the insulating pull rod to bear force until the insulator string is loosened, and the load is transferred to the insulating pull rod;
s4: tightening the lengthened double-head screw rod, and sequentially removing the 1 st to 5 th insulators at the wire end;
s5: the bowl head pulley and the cross plate pulley form a pulley group by using an insulating rope, the pulley group is 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 penetrates through a steering pulley arranged on a cross arm of an iron tower to be guided to the ground;
s6: and (3) penetrating another insulating rope on the U-shaped hanging ring, disconnecting the first insulator at the cross arm end from the hardware fitting, gradually loosening the insulating rope by utilizing the pulley block, and guiding the insulator string to the ground, thereby realizing the whole string dismantling of the triple three-hanging strain insulator string.
The invention solves the technical problem that the whole insulator string of the triple tension 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 diagram of a tool installation a for replacing a 420kN triple strain insulator string according to the present invention.
Fig. 4 is a diagram B of the tool for replacing a 420kN triple strain insulator string according to the present invention.
Fig. 5 is a front view of a cross arm end airfoil card of the present invention.
Figure 6 is a side view-cross-sectional view of a cross arm end airfoil card of the present invention.
Fig. 7 is a schematic view of the opened state of the wire end flap card of the present invention.
Fig. 8 is a schematic view of the wire end flap card of the present invention in a closed state.
Fig. 9 is a top view of the wire end flap card of the present invention in a closed position-a schematic view of the coupling position.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.
Fig. 1 and 2 show an assembly drawing of a +/-800 kV line 420kN triple-hanging strain insulator string hardware fitting, the insulator string spacing is 650mm, and each string of insulator string is provided with 420kN insulator 74 pieces and 15170mm in length except for a connecting hardware fitting. The connection length of the insulator is 205mm, and the diameter of the porcelain skirt is 400mm.
As shown in fig. 1 and 2, the insulator string hardware cross arm end includes: traction plate 1, parallel link plate 6, insulator 2, insulator chain gold utensil wire end includes: insulator 2, equalizer ring 3, bowl head 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 replacement 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 for bearing the wire tension.
The cross arm end clamp 8 is an airfoil clamp, and as shown in fig. 5 and 6, comprises a central clamping groove 32 and two wing parts 33. The central clamping groove 32 is matched with the cross arm side traction plate 1, the two parts are connected by bolts 23 and nuts 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 fixture 16 is a board turning clamp, as shown in fig. 7, 8 and 9, and comprises a board turning clamp main body 25, a rotating shaft 26, a board turning plate 27 and a groove part 34, wherein the board turning plate 27 can turn around the rotating shaft 26, and the groove part 34 is positioned at the center of the board turning clamp main body and the position of the board turning plate 27 close to the rotating shaft 26 and is used for being matched and connected with the parallel hanging plate bolt 6, the parallel hanging plate 7 and the cross hanging plate 5.
Fig. 7 shows the wire end clamp in an open state, and the wire end clamp can be opened by removing the nut 28, opening the turning plate 27, and sleeving the main body groove 34 outside the hexagonal head of the bolt 6.
Fig. 8 shows the wire end clamp in a closed state, the turning plate 27 is closed, the groove part 34 of the turning plate is sleeved outside the hexagonal head of the bolt 6, and the nut 28 is screwed tightly, so that the wire end clamp can be closed.
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 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 card rear card 12, an auxiliary closed type card front card 13, an elongated double-headed screw 14, an elongated joint 15, 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. Wherein the special insulation block comprises a bowl head block 21 and a cross plate block 20.
When the insulator string is required to be replaced, the auxiliary closed type clamp front clamp 13 is arranged on a sixth insulator steel cap of the lead end, the auxiliary closed type clamp front clamp 13 and the extension joint 15 are connected through the extension double-end lead screw 14, the extension joint 15 is connected with the connecting lug 31 of the lead end clamp, and the extension double-end lead screw is pre-tensioned. The auxiliary closed type rear clamp 12 is arranged on the 2 nd insulator steel cap at the cross arm end, and U-shaped hanging rings 11 are arranged 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 wire tightener 9 and the insulating pull rod 10, and the hydraulic wire tightener 9 is tightened to enable the wire end clamp 16, the cross arm end clamp 8 and the insulating pull rod 10 to bear force until the insulator string is loosened, and the load is transferred to the insulating pull rod 10. And (5) tightening the lengthening double-head screw rod 14, and sequentially removing the insulators from the (1) th piece to the (5) th piece of the lead end.
The bowl head pulley 21 and the cross plate pulley 20 are combined into a pulley block by using an insulating rope, and are lifted to the wire side, the bowl head pulley 21 is connected with a (6) th insulator, the cross plate pulley 20 is matched with the cross hanging plate 5, and the insulating rope is led to the ground through a steering pulley arranged on a cross arm of an iron tower (the steering pulley and the cross arm of the iron tower are not shown in the drawing).
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 taken off, the insulating rope is gradually loosened by utilizing a pulley block consisting of the bowl head pulley 21 and the cross plate pulley 20, and the insulator string is guided to the ground, so that the whole string of the triple-hanging tension insulator string is removed.
While the applicant has described and illustrated the examples of the present invention in detail with reference to the drawings of the specification, it should be understood by those skilled in the art that the above examples are only preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, but not limiting the scope of the present invention, but any improvements or modifications based on the spirit of the present invention should fall within the scope of the present invention.
Claims (3)
1. The replacement tool is characterized by comprising a main fixture and an auxiliary fixture, wherein the main fixture, the auxiliary fixture, the insulator string hardware cross arm end and the insulator string hardware wire end are matched to realize the whole string dismantling of the triple strain insulator string; the insulator string hardware cross arm end comprises a traction plate (1), a parallel hanging plate and an insulator (2) which are sequentially connected, and the insulator string hardware wire end comprises the insulator (2), a grading ring (3), a bowl head hanging plate (4), a cross hanging plate (5), a parallel hanging plate bolt and a parallel hanging plate (7) which are sequentially connected; the main clamp comprises a cross arm end clamp (8), a wire end clamp (16), an insulating pull rod (10) and a hydraulic tightener (9); the cross arm end clamp (8) is an airfoil clamp and comprises a central clamping groove (32) and two wing parts (33), wherein the central clamping groove is matched with the cross arm side traction plate (1), and the two wing parts are symmetrically distributed on two sides of the central clamping groove and are used for being connected with the hydraulic tightener (9); the wire end clamp (16) is a turning plate clamp and comprises a turning plate clamp main body (25), a rotating shaft (26), a turning plate (27) and a groove part (34), wherein the turning plate (27) can turn around the rotating shaft (26), and the groove part (34) is positioned at the center of the turning plate clamp main body (25) and the position of the turning plate, which is close to the rotating shaft, and is used for being matched and connected with a parallel hanging plate bolt, a parallel hanging plate (7) and a cross hanging plate (5); the cross arm end clamp is connected with the wire end clamp sequentially through the hydraulic tightener and the insulating pull rod, and is used as a main stress tool for bearing the tension of the wire; the auxiliary clamp comprises an auxiliary closed clamp rear clamp (12), an auxiliary closed clamp front clamp (13), a lengthened double-head screw (14), an extension joint (15), a special insulation pulley and an insulation rope, and is used for being matched with the main clamp to realize replacement of the whole string of insulators;
when the auxiliary closed type clamp front clamp (13) is used for being arranged on a sixth insulator steel cap of a lead end, the auxiliary closed type clamp front clamp (13) and an extension joint (15) are connected through a lengthening double-head lead screw (14), the extension joint (15) is connected with a connecting lug (31) of the lead end clamp again, and the lengthening double-head lead screw is pre-tensioned; the auxiliary closed type rear clamp (12) is used for being arranged on a steel cap of the 2 nd insulator at the cross arm end, and U-shaped hanging rings (11) are arranged at two ends of the auxiliary closed type rear clamp.
2. Tool according to claim 1, characterized in that the special insulation trolley comprises a bowl head trolley (21) and a cross plate trolley (20), wherein in use the bowl head trolley (21) and the cross plate trolley (20) are combined into a trolley group by using insulation ropes and lifted to the wire side, the bowl head trolley (21) is connected with a 6 th piece of insulator, the cross plate trolley (20) is matched with a cross hanging plate (5), and the insulation ropes are led to the ground through a steering trolley arranged on a cross arm of an iron tower; and the U-shaped hanging ring (11) is threaded with another insulating rope.
3. A method for replacing a triple strain insulator string, using the tool of claim 2, comprising the steps of:
s1: the auxiliary closed type clamp front clamp (13) is arranged on a sixth insulator steel cap of the lead end, the auxiliary closed type clamp front clamp (13) and the extension joint (15) are connected by using the lengthened double-head lead screw (14), the extension joint (15) is connected with the connecting lug (31) of the lead end clamp, and the lengthened double-head lead screw is pre-tensioned;
s2: the auxiliary closed type rear clamp (12) is arranged on a 2 nd insulator steel cap at the cross arm end, and U-shaped hanging rings (11) are arranged at the two ends of the auxiliary closed type rear clamp;
s3: the cross arm end clamp (8) is connected with the wire end clamp (16) sequentially through the hydraulic wire tightener (9) and the insulating pull rod (10), and the hydraulic wire tightener is tightened to enable the wire end clamp, the cross arm end clamp and the insulating pull rod to bear force until the insulator string is loosened, and the load is transferred to the insulating pull rod (10);
s4: tightening the lengthening double-head screw rod (14), and sequentially removing the 1 st to 5 th insulators at the wire end;
s5: the bowl head pulley (21) and the cross plate pulley (20) are combined into a pulley group by using an insulating rope, the pulley group is lifted to the side of a wire, 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 penetrates through a steering pulley arranged on a cross arm of an iron tower to be guided to the ground;
s6: and (3) threading another insulating rope on the U-shaped hanging ring (11), disconnecting the first insulator at the cross arm end from the hardware fitting, gradually loosening the insulating rope, and guiding the insulator string to the ground by utilizing the pulley block, thereby realizing the whole string dismantling of the triple tension insulator string.
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 CN114123030A (en) | 2022-03-01 |
| CN114123030B true 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114123030A (en) | 2022-03-01 |
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