CN114221256B - Method for replacing large connecting plate of extra-high voltage multi-split conductor - Google Patents
Method for replacing large connecting plate of extra-high voltage multi-split conductor Download PDFInfo
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- CN114221256B CN114221256B CN202111456281.8A CN202111456281A CN114221256B CN 114221256 B CN114221256 B CN 114221256B CN 202111456281 A CN202111456281 A CN 202111456281A CN 114221256 B CN114221256 B CN 114221256B
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- 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
-
- 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
- H02G1/04—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables for mounting or stretching
-
- 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
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/02—Devices for adjusting or maintaining mechanical tension, e.g. take-up device
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Abstract
The invention discloses a method for replacing a large yoke plate of an extra-high voltage multi-split conductor, and relates to the field of power transmission line overhaul. At present, when a large yoke plate is replaced, a four-wire lifter and a double-wire lifter are adopted for operation, a plurality of sets of wire lifting systems are needed, front-back shifting inconsistency of different sub-wires is easily caused, and after replacement is finished, the mounting positions of the sub-wires are inconsistent, so that a suspension clamp is askew. The invention directly adopts the new hardware fitting comprising the new wire clamp and the new connecting plate, is pre-connected with the wire when being at a certain distance from the old hardware fitting, and then moves the new hardware fitting into place for fastening after the old hardware fitting is moved away, and then removes the old hardware fitting. According to the method, the multi-split conductors are fixed and then are regarded as a group of conductors to be integrally lifted, lifting stress points of each sub-conductor are on the same vertical plane, and only one set of conductor lifting system is used, so that the arrangement of the plurality of sets of lifting systems in a narrow area on a tower in the traditional operation is avoided, the replacement of a large yoke plate is greatly facilitated, and the skew of a suspension clamp is avoided.
Description
Technical Field
The invention relates to the field of power transmission line overhaul, in particular to a method for replacing a large yoke plate of an extra-high voltage multi-split conductor.
Background
The extra-high voltage line generally adopts 6 split wires and 8 split wires, the wires are generally distributed in a regular hexagon or a regular octagon, the transmission line straight line string is generally composed of hardware fittings and insulators, the transmission line straight line string is connected with the wires through suspension clamps, and suspension clamps of the multi-split wires are integrated together through large connecting plates and then connected with the insulators.
When the big yoke plate is damaged, the big yoke plate of the tangent tower hardware fitting string needs to be replaced, and because the dead weight of the lead is large, the stress of the yoke plate needs to be reduced after each sub-lead is lifted, so that the big yoke plate can be removed and replaced after not being stressed.
The extra-high voltage linear serial large yoke plate is less in replacement, a four-wire lifter and two-wire lifter combination is generally adopted at present to lift and temporarily fix a wire, a construction hole on the large yoke plate is lifted through a lifting rope, the large yoke plate is dismounted after the large yoke plate and an upper hardware fitting are not stressed, the large yoke plate is lowered to the ground through the lifting rope, and the large yoke plate is lifted to the hardware fitting serial position for reinstallation after being replaced by a new large yoke plate.
Because the extra-high voltage circuit split conductor number is more, does not have special six line lifters or eight line lifters at present, need to adopt four-wire lifter + double line lifter combination to carry out the operation, increased the lifting system quantity, different lifting system stress points are not in same perpendicular simultaneously, when two sets of lifters have the skew of lifting hook position or wire size and number difference, the gear is great, can lead to different skew after lifting of different subconductors, very easily cause different subconductors to shift inconsistent back and forth, subconductor mounted position inconsistency leads to the suspension clamp to have the skew after changing, from the above, current changing method is not only loaded down with trivial details, and reduced the replacement quality, need rework correction, overhaul change speed is slow, and is inefficiency, if not revise, serious can have the potential safety hazard.
Disclosure of Invention
The technical problem to be solved and the technical task to be put forward in the invention are to perfect and improve the prior art scheme, and the invention provides a method for replacing a large yoke plate of an extra-high voltage multi-split conductor, which aims to facilitate the replacement of the large yoke plate, improve the replacement quality and efficiency and avoid the situation that a suspension wire is askew. For this purpose, the present invention adopts the following technical scheme.
A method for replacing a large connecting plate of an extra-high voltage multi-split conductor comprises the following steps:
1) After the personal security line is hung on the operation phase, personnel log on the iron tower to be in place, and a security rope for preventing the string from falling is hung;
2) Lifting a new hardware fitting comprising a new wire clamp and a new connecting plate to a wire, and completing connection installation between the new wire clamp and the new connecting plate and the wire when the new hardware fitting is 40-60cm away from the original wire clamp, so as to fasten bolts;
3) Arranging 1 set of wire lifting system by using the construction hole of the new connecting plate, and tightening the wire lifting system to loosen the old insulator string;
4) Moving the old suspension clamp and the old connecting plate 40-60cm towards the side of the other end of the wire opposite to the position of the new connecting plate, fastening bolts, loosening a wire lifting system arranged on the new connecting plate, and stressing the old hardware string;
5) Moving the suspension new wire clamp and the new connecting plate to the position of the old wire clamp for positioning and fastening, tightening the wire lifting system again to loosen the old insulator string, arranging a safety rope between the old connecting plate and the cross arm hanging point, arranging an insulator dismantling system at the same time, fixing one end on a repair hole of the DB adjusting plate or the iron tower cross arm, fixing one end on the repair hole of the two connecting plates, tightening the insulator dismantling system, and respectively dismantling the connection of the 2 insulators and the two connecting plates;
6) The two connecting plates are fixed by the transmission ropes and the pulleys, the two connecting plates are tightened by the transmission ropes, the two connecting plates are disassembled to be connected with the old hanging wire connecting plates, the two connecting plates are moved to the new connecting plates by the transmission ropes to be connected with the new connecting plates, then the 2 insulators are restored to be connected with the two connecting plates, and the insulators on the other side are operated according to the same steps;
7) Loosening a lead lifting system of the new connecting plate to stress the insulator;
8) The old yoke plate is removed and slowly lowered to the ground through the transfer rope.
The method directly utilizes the new yoke plates and the new wire clamps which need to be replaced to integrally lift the wires, the multi-split wires are fixed and then are regarded as a group of wires to integrally lift, the lifting stress points of each sub wire are positioned on the same vertical plane, the positions of the wire hanging points are unchanged after the lifting system is stressed, and the initial state can be restored after the replacement is completed.
As a preferable technical means: in the step 1), the anti-falling string safety rope adopts a Dinima rope, and when the anti-falling string safety rope is hung, a wire is wound to be used as the anti-falling string safety rope; in the step 5), the safety rope is a Dinima rope. The Dinima rope is widely applied to the construction and maintenance operation of a power transmission line, is used as a guide rope and a safety rope for preventing the rope from falling, is a stock material for construction, is convenient to purchase and use, and has low cost.
As a preferable technical means: the wire lifting system comprises a first shackle, a second shackle, a first hoist, a first steel wire sleeve, a second steel wire sleeve and a hoisting point pulley, wherein 2 shackles are hung on the iron tower cross arm, the first shackle is connected with the first steel wire sleeve, the first steel wire sleeve penetrates through the hoisting point pulley and then is connected to a hook of the first hoist, the upper hook of the first hoist is connected with the second shackle through the second steel wire sleeve, and the hoisting point pulley hook is connected with a construction hole of a new yoke plate. And a wire lifting system is effectively realized.
As a preferable technical means: the insulator dismantling system comprises a third steel wire sleeve, a fourth steel wire sleeve and a second hoist, wherein the third steel wire sleeve is hung at a hook at the lower end of the second hoist, the lower end of the third steel wire sleeve is connected with a process hole of the second yoke plate through a third shackle, the fourth steel wire sleeve is sleeved on an iron tower cross arm, and the lower end of the fourth steel wire sleeve is connected with a hook at the upper end of the second hoist. And an insulator dismantling system is effectively realized.
As a preferable technical means: the Dinima rope adopts the diameter specification of phi 22-26. The diameter specification strength can effectively ensure the safety.
As a preferable technical means: the first shackle and the second shackle adopt DG9-DG12 specification ranges, and the third shackle adopts 200KN-300KN specification ranges. And selecting a shackle with proper specification according to different bearing forces.
As a preferable technical means: the first hoist adopts an aluminum alloy lever hoist with the specification range of 80-120kN, and the second hoist adopts an aluminum alloy lever hoist with the specification range of 30-50 kN. And selecting a lever block with proper specification according to different bearing forces.
As a preferable technical means: the first steel wire sleeve and the second steel wire sleeve adopt phi 20-22 diameter specifications, and the third steel wire sleeve and the fourth steel wire sleeve adopt phi 17-19 diameter specifications. And selecting a steel wire sleeve with proper specification according to different bearing forces.
The beneficial effects are that: the method directly utilizes the new yoke plates and the new wire clamps which need to be replaced to integrally lift the wires, the multi-split wires are fixed and then are regarded as a group of wires to integrally lift, the lifting stress points of each sub wire are on the same vertical plane, the positions of the wire hanging points are unchanged after the lifting system is stressed, and the initial state can be restored after the replacement is completed.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Fig. 2 is a schematic diagram of a hanging of the wire lifting system and the insulator removal system of the present invention.
Fig. 3 is a schematic view of a hanging structure of the wire lifting system of the present invention.
Fig. 4 is a schematic view of a hanging structure of the insulator removal system of the present invention.
Fig. 5 is an enlarged schematic view of a portion a in fig. 3.
In the figure: 1. a cross arm; 2. a safety rope; 3. an insulator; 4. a wire lifting system; 5. an insulator dismantling system; 6. a new connection plate; 7. a wire; 8. a new wire clamp; 9. a second connecting plate; 401. a first shackle; 402. a second shackle; 403. a first wire sleeve; 404. a first hoist; 405. a hoisting point pulley; 406. a second wire sleeve; 501. a third wire sleeve; 502. a fourth wire sleeve; 503. a second hoist; 504. and a third shackle.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the attached drawings.
As shown in fig. 1-5, a method for replacing a large yoke plate of an extra-high voltage multi-split conductor comprises the following steps:
s1: after the personal security line is hung on the operation phase, personnel log on the iron tower to be in place, and a security rope for preventing the string from falling is hung;
s2: lifting a new hardware fitting comprising a new wire clamp 8 and a new connecting plate 6 to a wire 7, and completing the installation of the new wire clamp 8 and the new connecting plate 6 when the distance from the new hardware fitting to the wire 7 is about 50cm away from the original wire clamp, and fastening bolts;
s3: arranging 1 set of wire lifting system 4 by using the construction hole of the new connecting plate 6, and tightening the wire lifting system 4 to loosen the old insulator 3 string;
s4: the old suspension clamp and the old connecting plate are moved to the direction of the other end of the wire 7 opposite to the position of the new connecting plate 6 by about 50cm, bolts are fastened, and the wire lifting system 4 arranged on the new connecting plate 6 is loosened, so that the old hardware string is stressed;
s5: moving the suspension new wire clamp 8 and the new connecting plate 6 to the position of the old wire clamp to be in place and fastened, tightening the wire lifting system 4 again to loosen the old insulator 3 string, arranging the safety rope 2 between the old connecting plate and the hanging point of the cross arm 1, arranging the insulator dismantling system 5 at the same time, fixing one end on the DB adjusting plate or the overhaul hole of the cross arm 1 of the iron tower, fixing one end on the overhaul hole of the two connecting plates 9, tightening the insulator dismantling system 5, and respectively dismantling the connection between the 2 insulators 3 and the two connecting plates 9;
s6: fixing the two connecting plates 9 by using a transmission rope and a pulley, tightening the two connecting plates 9 by using the transmission rope, dismantling the two connecting plates 9 to be connected with the old hanging wire connecting plates, moving the two connecting plates 9 to the position of the new connecting plate 6 by using the transmission rope, connecting with the new connecting plate 6, recovering 2 insulators 3 to be connected with the two connecting plates 9, and operating the insulators 3 on the other side according to the same steps;
s7: loosening the lead lifting system 4 of the new connecting plate 6 to stress the insulator 3;
s8: the old yoke plate is removed and slowly lowered to the ground through the transfer rope.
In order to facilitate purchasing, in the step 1, the anti-falling string safety rope adopts a Dinima rope, and when the anti-falling string safety rope is hung, a wire 7 is wound to be used as the anti-falling string safety; in step 5, the safety rope 2 is a dijma rope. The Dinima rope is widely applied to the construction and maintenance operation of a power transmission line, is used as a guide rope and a safety rope for preventing the rope from falling, is a stock material for construction, is convenient to purchase and use, and has low cost.
In order to achieve lifting of the wire 7, the wire lifting system 4 comprises a first shackle 401, a second shackle 402, a first hoist 404, a first wire sleeve 403, a second wire sleeve 406 and a hoisting point pulley 405,2, wherein the first shackle 401 is connected with the first wire sleeve 403, the first wire sleeve 403 passes through the hoisting point pulley 405 and then is connected to a hook of the first hoist 404, and an upper end hook of the first hoist 404 is connected with the second shackle 402 through the second wire sleeve 406, and the hoisting point pulley 405 hooks a construction hole of the new yoke plate 6. The wire lifting system 4 is effectively implemented.
In order to realize dismantling of the insulator 3, the insulator dismantling system 5 comprises a third steel wire sleeve 501, a fourth steel wire sleeve 502 and a second hoist 503, wherein the third steel wire sleeve 501 is hung at the lower end of the second hoist 503, the lower end of the third steel wire sleeve 501 is connected with a process hole of the two connecting plates 9 through a third shackle 504, the fourth steel wire sleeve 502 is sleeved on the iron tower cross arm 1, and the lower end of the fourth steel wire sleeve 502 is connected with a hook at the upper end of the second hoist 503. The insulator removal system 5 is effectively realized.
In this example, the diy rope takes the diameter of Φ24. The diameter specification strength can effectively ensure the safety.
In this example, the first shackle 401 and the second shackle 402 are in DG9.5, and the third shackle 504 is in 200 KN.
In this example, the first hoist 404 is an aluminum alloy lever hoist of 100kN standard, and the second hoist 503 is an aluminum alloy lever hoist of 30kN standard.
In this example, the first wire sleeve 403 and the second wire sleeve 406 are of a diameter of Φ21.5, and the third wire sleeve 501 and the fourth wire sleeve 502 are of a diameter of Φ17.5.
In this example, the wire 7 is an eight-split wire.
According to the method, the new yoke plate 6 and the new wire clamp 8 which need to be replaced are directly utilized to integrally lift the wires 7, the multi-split wires 7 are fixed and then are regarded as a group of wires 7 to integrally lift, lifting stress points of each sub wire 7 are located on the same vertical plane, after the lifting system is stressed, the positions of hanging points of the wires 7 are unchanged, and the initial state can be restored after replacement is completed.
The method for replacing the large yoke plate of the extra-high voltage multi-split conductor shown in the above figures 1-5 is a specific embodiment of the invention, has shown the outstanding substantial characteristics and remarkable progress of the invention, and can be equivalently modified in terms of shape, structure and the like according to actual use requirements under the teaching of the invention, and the method is within the scope of protection of the scheme.
Claims (8)
1. The method for replacing the large connecting plate of the extra-high voltage multi-split conductor is characterized by comprising the following steps of:
1) After the personal security line is hung on the operation phase, personnel log on the iron tower to be in place, and a security rope for preventing the string from falling is hung;
2) Lifting a new hardware fitting comprising a new wire clamp (8) and a new connecting plate (6) to a wire (7), and completing the installation of the new wire clamp (8) and the new connecting plate (6) when the distance from the wire (7) to the original wire clamp is 40-60cm, so as to fasten bolts;
3) Arranging 1 set of wire lifting system (4) by using a construction hole of a new connecting plate (6), and tightening the wire lifting system (4) to loosen the old insulator (3) string;
4) Moving the old suspension clamp and the old connecting plate 40-60cm towards the side of the other end direction of the wire (7) opposite to the position of the new connecting plate (6), fastening bolts, and loosening the wire lifting system (4) arranged on the new connecting plate (6) to enable the old hardware string to bear force;
5) Moving a suspension new wire clamp (8) and a new connecting plate (6) to the position of an old wire clamp for positioning and fastening, tightening a wire lifting system (4) again to loosen the old insulator (3) string, arranging a safety rope (2) between the old connecting plate and a hanging point of a cross arm (1), arranging an insulator dismantling system (5) at the same time, fixing one end of the safety rope on a manhole of a DB adjusting plate or a cross arm (1) of an iron tower, fixing one end of the safety rope on a manhole of a two-connecting plate (9), tightening the insulator dismantling system (5), and respectively dismantling the connection between 2 insulators (3) and the two-connecting plate (9);
6) The two connecting plates (9) are fixed by the transmission ropes and the pulleys, the two connecting plates (9) are tightened by the transmission ropes, the two connecting plates (9) are disassembled to be connected with the old hanging wire connecting plates, the two connecting plates (9) are moved to the positions of the new connecting plates (6) by the transmission ropes to be connected with the new connecting plates (6), then the connection of the 2 insulators (3) and the two connecting plates (9) is restored, and the insulators (3) on the other side are operated according to the same steps;
7) Loosening the lead lifting system (4) of the new connecting plate (6) to enable the insulator (3) to bear force;
8) The old yoke plate is removed and slowly lowered to the ground through the transfer rope.
2. The method for replacing a large yoke plate of an extra-high voltage multi-split conductor according to claim 1, wherein the method comprises the following steps: in the step 1), the anti-falling string safety rope adopts a Dinima rope, and when the anti-falling string safety rope is hung, a wire (7) is wound to serve as the anti-falling string safety rope; in the step 5), the safety rope (2) adopts a Dinima rope.
3. The method for replacing a large yoke plate of an extra-high voltage multi-split conductor according to claim 1, wherein the method comprises the following steps: the wire lifting system (4) comprises a first shackle (401), a second shackle (402), a first hoist (404), a first steel wire sleeve (403), a second steel wire sleeve (406) and a hoisting point pulley (405), wherein the 2 shackles are hung on the iron tower cross arm (1), the first shackle (401) is connected with the first steel wire sleeve (403), the first steel wire sleeve (403) penetrates through the hoisting point pulley (405) and then is connected to a hook of the first hoist (404), and a hook at the upper end of the first hoist (404) is connected with the second shackle (402) through the second steel wire sleeve (406), and the hoisting point pulley (405) is hooked to a construction hole of a new connecting plate (6).
4. A method for replacing a large yoke plate of an extra-high voltage multi-split conductor according to claim 3, wherein the method comprises the following steps: the insulator dismantling system (5) comprises a third steel wire sleeve (501), a fourth steel wire sleeve (502) and a second hoist (503), wherein the third steel wire sleeve (501) is hung at the lower end of the second hoist (503), the lower end of the third steel wire sleeve (501) is connected with a process hole of the two connecting plates (9) through a third shackle (504), the fourth steel wire sleeve (502) is sleeved on the iron tower cross arm (1), and the lower end of the fourth steel wire sleeve (502) is connected with the hook at the upper end of the second hoist (503).
5. The method for replacing a large yoke plate of an extra-high voltage multi-split conductor according to claim 2, wherein the method comprises the following steps of: the Dinima rope adopts the diameter specification of phi 22-26.
6. The method for replacing large yoke plates of extra-high voltage multi-split conductor according to claim 4, wherein the method comprises the following steps: the first shackle (401) and the second shackle (402) adopt DG9-DG12 specification ranges, and the third shackle (504) adopts 200KN-300KN specification ranges.
7. The method for replacing large yoke plates of extra-high voltage multi-split conductor according to claim 4, wherein the method comprises the following steps: the first hoist (404) adopts an aluminum alloy lever hoist with the specification range of 80-120kN, and the second hoist (503) adopts an aluminum alloy lever hoist with the specification range of 30-50 kN.
8. The method for replacing large yoke plates of extra-high voltage multi-split conductor according to claim 4, wherein the method comprises the following steps: the first steel wire sleeve (403) and the second steel wire sleeve (406) adopt phi 20-22 diameter specifications, and the third steel wire sleeve (501) and the fourth steel wire sleeve (502) adopt phi 17-19 diameter specifications.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111456281.8A CN114221256B (en) | 2021-12-01 | 2021-12-01 | Method for replacing large connecting plate of extra-high voltage multi-split conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111456281.8A CN114221256B (en) | 2021-12-01 | 2021-12-01 | Method for replacing large connecting plate of extra-high voltage multi-split conductor |
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| Publication Number | Publication Date |
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| CN114221256A CN114221256A (en) | 2022-03-22 |
| CN114221256B true CN114221256B (en) | 2023-08-22 |
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| CN202111456281.8A Active CN114221256B (en) | 2021-12-01 | 2021-12-01 | Method for replacing large connecting plate of extra-high voltage multi-split conductor |
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| CN114221256A (en) | 2022-03-22 |
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