CN110137852B - Single-piece replacement method for tension insulator of ultra-high voltage transmission line - Google Patents
Single-piece replacement method for tension insulator of ultra-high voltage transmission line Download PDFInfo
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- CN110137852B CN110137852B CN201910477519.1A CN201910477519A CN110137852B CN 110137852 B CN110137852 B CN 110137852B CN 201910477519 A CN201910477519 A CN 201910477519A CN 110137852 B CN110137852 B CN 110137852B
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- 239000012211 strain insulator Substances 0.000 claims abstract description 66
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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
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Abstract
The invention provides a method for replacing a strain insulator single sheet of an ultra-high voltage transmission line, which belongs to the technical field of high-voltage transmission line maintenance, wherein an ultra-high voltage transmission line strain insulator single sheet replacing platform is adopted for operation, and comprises a cross-shaped hanging bracket and a fixture arranged on the cross-shaped hanging bracket and used for clamping a strain insulator string; the cross-shaped hanger comprises a cross beam and a longitudinal beam hinged to the middle part of the cross beam through a cross joint; a sliding assembly is arranged on one side of the cross joint on the longitudinal beam, and a pulley is connected to the sliding assembly; the clamping devices comprise two first clamping devices respectively connected to two ends of the cross beam and a second clamping device connected with the longitudinal beam; the second fixture and the pulley are respectively positioned on two sides of the cross beam. The method for replacing the tension insulator single sheet of the ultra-high voltage transmission line can reduce the labor intensity of live working personnel, improve the working efficiency and reduce the working risk.
Description
Technical Field
The invention belongs to the technical field of high-voltage transmission line maintenance, and particularly relates to a method for replacing a strain insulator single sheet of an ultra-high voltage transmission line.
Background
In the overhaul working process of a high-voltage transmission line, the strain insulator of a 1000kV ultrahigh-voltage transmission line is replaced under the condition of live working, the general weight of a strain insulator single sheet of the 1000kV ultrahigh-voltage transmission line is more than 30kg, tools such as a closed fixture, a hydraulic screw and the like are required to be used, the self weight of the strain insulator single sheet and the overhaul tool is required to be conveyed by using a hoisting tackle, the hoisting tackle is usually hung on a strain insulator string by using an insulating rope sleeve during the current working so as to form a hoisting system, then a ground worker controls a hoisting insulating rope to transfer an insulator and a tool to the vicinity of the strain insulator string, then the worker on the strain insulator string takes off the strain insulator single sheet from the hoisting tackle, the hoisting position in the mode is lower than the height of the strain insulator string, the weight of an object is large, so that the live worker can difficultly take off the overhaul tool and the strain insulator single sheet from the, and the physical power consumption is large, the operation is very inconvenient, danger is easy to occur, long time is needed, and the maintenance work efficiency is influenced.
Disclosure of Invention
The invention aims to provide a method for replacing a single tension insulator of an ultra-high voltage transmission line, and aims to solve the problems of high labor intensity, low working efficiency and high operation risk in the replacement process of the single tension insulator of the ultra-high voltage transmission line.
In order to achieve the purpose, the invention adopts the technical scheme that: the method comprises the steps that a single strain insulator replacing platform of the ultra-high voltage transmission line is adopted for operation, and the single strain insulator replacing platform of the ultra-high voltage transmission line comprises a cross-shaped hanging bracket and a fixture arranged on the cross-shaped hanging bracket and used for clamping a strain insulator string; the cross-shaped hanger comprises a cross beam and a longitudinal beam hinged to the middle part of the cross beam through a cross joint; a sliding assembly is arranged on one side of the cross joint on the longitudinal beam, and a pulley is connected to the sliding assembly; the clamping devices comprise two first clamping devices respectively connected to two ends of the cross beam and a second clamping device connected with the longitudinal beam through a pull rope; the second fixture and the pulley are respectively positioned on two sides of the cross beam;
the method for replacing the tension insulator single sheet of the ultra-high voltage transmission line comprises the following steps:
A. clamping and fixing the two first clamping devices on two steel caps of the same strain insulator string, ensuring that an insulator single sheet to be replaced is in the middle position of the two first clamping devices, and clamping the second clamping device on one steel cap of the other strain insulator string;
B. pressing one end of the longitudinal beam, which is connected with the second fixture, so that one end of the longitudinal beam, which is connected with the pulley, is lifted to the highest position, the longitudinal beam is fixed, then the tension insulator single sheet to be replaced is connected with the rope of the pulley, the tension insulator single sheet is detached, the sliding assembly is moved, the longitudinal beam returns to the horizontal position after the pulley is moved to the end part of the longitudinal beam, the pulley operator controls the pulley rope to send the tension insulator single sheet to the ground, and then the longitudinal beam returns to the horizontal position and is fixed;
C. hoisting the new strain insulator single sheet to the highest position through the pulley, and then pressing one end of the longitudinal beam connected with the second fixture to enable one end of the longitudinal beam connected with the pulley to rise until the strain insulator single sheet reaches the height convenient for installation, and fixing the longitudinal beam;
D. and moving the position of the sliding assembly on the longitudinal beam, moving the pulley to a position close to and right above the position of the strain insulator single sheet to be installed, loosening the pull rope, controlling the longitudinal beam and enabling one end of the longitudinal beam, which is connected with the pulley, to slowly descend, moving the strain insulator single sheet to the installation position, fixing the pull rope again, and taking down and installing the strain insulator single sheet from the pulley.
Furthermore, the cross joint comprises a connecting sleeve and two connecting lugs, the connecting sleeve is arranged in the middle of the cross beam and penetrates through the side wall of the connecting sleeve and the side wall of the cross beam through a connecting shaft for fixation; the two connecting lugs are arranged on the top surface of the connecting sleeve at intervals, the longitudinal beam is arranged between the two connecting lugs, and the longitudinal beam penetrates through the two connecting lugs and is hinged to the side wall of the longitudinal beam through the connecting shaft.
Furthermore, racks extending along the length direction of the side walls of the longitudinal beams are arranged on the side walls of the longitudinal beams; one end face of the rack is close to the end face of the longitudinal beam or is flush with the end face of the longitudinal beam; the sliding assembly comprises a gear meshed with the rack and a sliding shell sleeved on the longitudinal beam and connected with the gear through a rotating shaft.
Furthermore, the sliding assembly also comprises a rocking handle connected with one end of the rotating shaft of the gear; the rocking handle is located the outside of sliding housing.
Furthermore, at least two groups of supporting wheels in rolling contact with the top wall of the longitudinal beam are arranged on the top surface of the sliding shell; at least two groups of limiting wheels in rolling contact with the side wall of the longitudinal beam are further arranged in the sliding shell, and the limiting wheels are located above the gears.
Further, the distances from the two ends of the longitudinal beam to the cross joint are different; the second fixture is located the longeron and keeps away from cross joint one end.
Further, the cover is equipped with rather than sliding connection's second sliding sleeve on the longeron, and the roof of second sliding sleeve is equipped with the second fastener with longeron top surface butt.
Further, a hook is arranged on the bottom surface of the second sliding sleeve; the pull rope is an annular chain and comprises a plurality of chain links which are connected in pairs, and any chain link can be hung on the hook.
Furthermore, the second fixture comprises two clamping jaws, an elastic element and an L-shaped buckle, and the two clamping jaws are hinged through a pin shaft; two ends of the elastic element are respectively connected with the positions of the two clamping jaws close to the pin shaft; one end of the L-shaped buckle is hinged with one clamping jaw, and the other end of the L-shaped buckle is hung and connected with a clamping pin arranged on the other clamping jaw.
Further, crossbeam both ends are equipped with respectively with crossbeam sliding connection's first sliding sleeve, and the roof of first sliding sleeve be equipped with the fastener of crossbeam top surface butt, two first fixtures can dismantle with two first sliding sleeves respectively and be connected.
The method for replacing the tension insulator single sheet of the ultra-high voltage transmission line has the beneficial effects that: compared with the prior art, the method for replacing the single tension insulator of the ultra-high voltage transmission line has the advantages that the hanger is fixed above the insulator string by the aid of the fixture and is higher than the insulator string, the pulley is arranged on the longitudinal beam of the hanger, the maintenance tool or the single tension insulator can be lifted to the highest position, the longitudinal beam can be pressed to rotate around a hinge point with the cross joint, and the pulley can be further heightened to reach the height convenient for operation of hot-line workers; through using special high tension transmission line strain insulator monolithic platform, make the coaster can carry maintenance instrument or strain insulator monolithic to make things convenient for live working personnel to operate and the height of taking off, greatly reduced intensity of labour, improved strain insulator monolithic and changed efficiency, and the transportation process is steady, safe, has reduced the operation risk.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a single strain insulator replacement platform of an ultra-high voltage transmission line adopted in an embodiment of the invention;
FIG. 2 is a schematic view of a cross-joint structure according to an embodiment of the present invention;
FIG. 3 is a front view of a platform for replacing strain insulator singlechips of an ultra-high voltage transmission line, which is adopted by the embodiment of the invention;
FIG. 4 is a right side view of FIG. 3;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a cross-sectional view B-B of FIG. 5;
FIG. 7 is a schematic view of a slide case structure employed in an embodiment of the present invention;
FIG. 8 is a schematic structural view of a second fixture used in an embodiment of the present invention;
fig. 9 is a schematic view of the working state of the platform for replacing the tension insulator single sheet of the ultra-high voltage transmission line according to the embodiment of the present invention.
In the figure: 1. a cross-shaped hanger; 2. a fixture; 3. a sliding assembly; 4. a pulley; 11. a cross beam; 12. a stringer; 13. a cross joint; 21. a first clamp; 22. a second fixture; 23. pulling a rope; 24. hooking; 30. a slide case; 31. a gear; 32. a rack; 33. a rotating shaft; 34. a rocking handle; 35. hanging a ring; 36. a support wheel; 37. a limiting wheel; 101. a first sliding sleeve; 102. a second sliding sleeve; 105. a first fastener; 106. a second fastener; 131. connecting sleeves; 132. connecting lugs; 133. a connecting shaft; 203. a chain link; 211. a quick connection chuck; 221. a claw; 222. an elastic element; 223. a pin shaft; 224. an L-shaped buckle; 225. a bayonet lock; 301. a fixing plate; 302. a first mounting hole; 303. a central bore; 304. and a second mounting hole.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 4 and fig. 9 together, the method for replacing the tension insulator single piece of the ultra-high voltage transmission line according to the present invention will now be described. The method for replacing the strain insulator single sheet of the ultra-high voltage transmission line adopts an ultra-high voltage transmission line strain insulator single sheet replacing platform to operate, wherein the ultra-high voltage transmission line strain insulator single sheet replacing platform comprises a cross-shaped hanging bracket 1 and a fixture 2 which is arranged on the cross-shaped hanging bracket 1 and is used for clamping a strain insulator string; the cross-shaped hanger 1 comprises a cross beam 11 and a longitudinal beam 12 hinged to the middle part of the cross beam 11 through a cross joint 13; a sliding component 3 is arranged on one side of the longitudinal beam 12, which is positioned at the cross joint 13, and a pulley 4 is connected to the sliding component 3; the fixture 2 comprises two first fixtures 21 respectively connected to two ends of the cross beam 11 and a second fixture 22 connected with the longitudinal beam 12 through a pull rope 23; the second fixture 22 and the pulley 4 are respectively positioned at two sides of the beam 11;
based on the structure of the strain insulator single-piece replacing platform for the ultra-high voltage transmission line, the strain insulator single-piece replacing method for the ultra-high voltage transmission line comprises the following steps:
A. clamping and fixing two first clamping devices 21 on two steel caps of the same strain insulator string, ensuring that an insulator single sheet to be replaced is positioned in the middle of the two first clamping devices 21, and clamping a second clamping device 22 on one steel cap of the other strain insulator string;
B. pressing one end of the longitudinal beam 12 connected with the second fixture 22 to enable one end of the longitudinal beam 12 connected with the pulley 4 to rise to the highest position and enable the longitudinal beam 12 to be fixed, then connecting the tension insulator single sheet to be replaced with a rope of the pulley 4, detaching the tension insulator single sheet, moving the sliding assembly 3 to enable the pulley 4 to move to the end part of the longitudinal beam 12, enabling the longitudinal beam 12 to return and keep horizontal, controlling the pulley 4 rope by an operator of the pulley 4 to send the tension insulator single sheet to the ground, and enabling the longitudinal beam 12 to return to the horizontal position and be fixed;
C. hoisting the new strain insulator single sheet to the highest position through the pulley 4, and then pressing the longitudinal beam 12 to be connected with one end of the second fixture 22 to enable one end, connected with the pulley 4, of the longitudinal beam 12 to be raised until the strain insulator single sheet reaches the height convenient for installation, and fixing the longitudinal beam 12;
D. and moving the position of the sliding assembly 3 on the longitudinal beam 12, moving the pulley 4 to be close to and above the position of the tension insulator single sheet to be installed, loosening the pull rope 23, controlling the longitudinal beam 12 and enabling one end of the longitudinal beam connected with the pulley 4 to slowly descend, moving the tension insulator single sheet to the installation position, fixing the pull rope 23 again, and taking down and installing the tension insulator single sheet from the pulley 4.
The invention provides a method for replacing a strain insulator single sheet of an ultra-high voltage transmission line, which adopts the following installation mode: respectively clamping two first clamping devices 21 on two steel caps of the same strain insulator string, and ensuring that a strain insulator single sheet to be replaced is positioned in the middle of the two first clamping devices 21; the second fixture 22 is clamped on one of the steel caps of the other strain insulator string, and then the pull rope 23 is reliably connected with the longitudinal beam 12; the position of the sliding assembly 3 is adjusted to be close to the end part of the longitudinal beam 12 in the direction far away from the cross joint 13, so that the process of hoisting and taking the overhaul tool or the strain insulator single sheet of the pulley 4 is ensured not to interfere with the strain insulator string; after the maintenance tool or the strain insulator single piece is lifted to the highest position, if the height of the strain insulator string is not exceeded, one end of the longitudinal beam 12 far away from the cross joint 13 is pressed downwards, the pulley 4 is further lifted until the height of the strain insulator string is exceeded, the pull rope 23 is tightened and fixed, and then the sliding assembly 3 is moved towards the cross joint 13 until the strain insulator single piece is conveyed to the position where the strain insulator single piece is convenient to take down and install. The whole process is time-saving and labor-saving, and is safe, reliable and efficient.
Compared with the prior art, the method for replacing the single tension insulator of the ultra-high voltage transmission line has the advantages that the cross-shaped hanger 1 is fixed above the insulator string and higher than the insulator string by the fixture 2, the pulley 4 is arranged on the longitudinal beam 12 of the cross-shaped hanger 1, an overhaul tool or the single tension insulator can be conveyed to a position exceeding the height of the single tension insulator, the longitudinal beam 12 can be pressed to rotate by taking a hinged point with the cross joint 13 as a center, the pulley 4 is further heightened, and the height convenient for a live working worker to operate is reached; utilize special high tension transmission line strain insulator monolithic to change the platform, make coaster 4 can carry maintenance instrument or strain insulator monolithic to make things convenient for live working personnel to operate and the height of taking off, greatly reduced intensity of labour, improved strain insulator monolithic and changed efficiency, and the transportation process is steady, safe, has reduced the operation risk.
Referring to fig. 1 and fig. 2 together, as a specific embodiment of the method for replacing the tension insulator single sheet of the ultra-high voltage transmission line provided by the present invention, the cross joint 13 includes a connecting sleeve 131 and two connecting lugs 132, the connecting sleeve 131 is disposed in the middle of the cross beam 11, and passes through the side wall of the connecting sleeve 131 and the side wall of the cross beam 11 through a connecting shaft 133 for fixation; the two connecting lugs 132 are arranged on the top surface of the connecting sleeve 131 at intervals, and the longitudinal beam 12 is arranged between the two connecting lugs 132 and is hinged through the two connecting lugs 132 and the side wall of the longitudinal beam 12 by a connecting shaft 133. The connecting shaft 133 penetrates through the side wall of the connecting sleeve 131 and the side wall of the cross beam 11 to fix the cross joint 13 and the cross beam 11, the longitudinal beam 12 is hinged to the two connecting lugs 132, and the hinged point is higher than the height of the side wall of the longitudinal beam 12, so that interference between the longitudinal beam 12 and the cross beam 11 in the rotating process is avoided, the connection is reliable, and the rotation is flexible.
Referring to fig. 3 to fig. 6, as a specific embodiment of the method for replacing the tension insulator single sheet of the ultra-high voltage transmission line provided by the present invention, a rack 32 extending along the length direction of the side wall of the longitudinal beam 12 is provided; one end face of the rack 32 is close to the end face of the longitudinal beam 12 or is flush with the end face of the longitudinal beam 12; the sliding assembly 3 comprises a gear 31 engaged with the rack 32, and a sliding shell 30 sleeved on the longitudinal beam 12 and connected with the gear 31 through a rotating shaft 33 penetrating through the central hole 303; referring to fig. 7, the bottom surface of the sliding housing 30 is provided with a hanging ring 35 for hanging the pulley 4, so that the operation and installation are convenient. The sliding component 3 is driven by the meshing of the gear 31 and the rack 32, so as to drive the position of the pulley 4 to move, and the sliding component 3 slides stably on the longitudinal beam 12, so that the movement stability of the pulley 4 can be ensured.
Referring to fig. 5, as a specific embodiment of the method for replacing the tension insulator single sheet of the ultra-high voltage transmission line provided by the present invention, the sliding assembly 3 further includes a rocking handle 34 connected to one end of a rotating shaft 33 of the gear 31; the rocker handle 34 is located outside the slide housing 30. By swinging the rocking handle 34, the gear 31 is driven to rotate on the rack 32, and the sliding assembly 3 is driven to move on the longitudinal beam 12, so that the position of the pulley 4 is adjusted. The operation is convenient and labor-saving.
Referring to fig. 5 and fig. 6, as a specific embodiment of the method for replacing the tension insulator single sheet of the ultra-high voltage transmission line provided by the present invention, the top surface of the sliding shell 30 is provided with at least two sets of supporting wheels 36 in rolling contact with the top wall of the longitudinal beam 12; at least two groups of limiting wheels 37 in rolling contact with the side walls of the longitudinal beams 12 are further arranged in the sliding shell 30, and the limiting wheels 37 are positioned above the gear 31; referring also to fig. 7, the supporting wheel 36 is rotatably connected to a fixing plate 301 disposed on the top surface of the slide case 30 through a first mounting hole 302; the limiting wheel 37 is mounted on the second mounting hole 304 on the top surface of the slide case 30. Under the action of the gravity of the pulley 4 and the load thereof, the sliding friction force between the sliding shell 30 and the longitudinal beam 12 of the sliding assembly 3 is larger, so that at least two groups of supporting wheels 36 are arranged on the top surface of the sliding shell 30, the sliding motion between the sliding shell 30 and the longitudinal beam 12 is changed into the rolling motion of the supporting wheels 36 on the top wall of the longitudinal beam 12, and the movement of the sliding assembly 3 is more convenient and labor-saving; the limiting wheel 37 can counteract the shaking of the sliding component 3 caused by the gap between the sliding shell 30 and the longitudinal beam 12, and meanwhile, the situation that the sliding component 3 is easy to move due to the influence of movement resistance caused by sliding friction can be avoided.
Referring to fig. 3, as a specific embodiment of the method for replacing the tension insulator single sheet of the ultra-high voltage transmission line provided by the present invention, the distances from the two ends of the longitudinal beam 12 to the cross joint 13 are different; the second clamp 22 is located at an end of the longitudinal beam 12 remote from the spider 13. By utilizing the lever principle, the hot-line work personnel can press the longitudinal rod by using smaller force to adjust the height position of the pulley 4, and the labor intensity is reduced.
Referring to fig. 3, as a specific embodiment of the method for replacing the tension insulator single sheet of the ultra-high voltage transmission line provided by the present invention, a second sliding sleeve 102 slidably connected to the longitudinal beam 12 is sleeved on the longitudinal beam 12, a second fastening member 106 abutting against the top surface of the longitudinal beam 12 is disposed on the top wall of the second sliding sleeve 102, and the second clamping apparatus 22 is detachably connected to the second sliding sleeve 102 through a pull rope 23. Set up the position that second fixture 22 can conveniently be adjusted to second sliding sleeve 102, conveniently fix it in the position that strain insulator string does benefit to the operation most, can avoid causing the problem that second fixture 22 can't adapt to whole maintenance circumstances because of the distance difference between the strain insulator string, after second sliding sleeve 102 selects suitable position, screw second fastener 106, make the top surface butt of second fastener 106 and crossbeam 11, guarantee that second sliding sleeve 102 can not take place the position change under the artificial state of non-, guarantee the operation safety, in addition, stay cord 23 can be dismantled with second sliding sleeve 102 and be connected, can make things convenient for tightening up at any time and fix of stay cord 23, high efficiency, and convenient for operation.
Referring to fig. 2, as a specific embodiment of the method for replacing the tension insulator single sheet of the ultra-high voltage transmission line provided by the present invention, a hook 24 is disposed on the bottom surface of the second sliding sleeve 102; the pull rope 23 is an endless chain, and includes a plurality of chain links 203 connected in pairs, and any one of the chain links 203 can be hung on the hook 24. After the longitudinal beam 12 is pressed to enable the pulley 4 to reach the position which is most convenient to operate, the proper chain link 203 is selected to be hung on the hook 24, so that the pulley is safe, reliable, simple and convenient, the operation efficiency can be greatly improved, the labor intensity is reduced, and the operation safety is ensured.
Referring to fig. 8, as a specific embodiment of the method for replacing the tension insulator single sheet of the ultra-high voltage transmission line provided by the present invention, the second fixture 22 includes two jaws 221, an elastic element 222 and an L-shaped buckle 224, and the two jaws 221 are hinged by a pin 223; two ends of the elastic element 222 are respectively connected with the two claws 221 near the pin 223; one end of the L-shaped buckle 224 is hinged with one claw 221, and the other end is hooked with a clamping pin 225 arranged on the other claw 221. The elastic element 222 is an elastic rope with strong tensile force, the two clamping jaws 221 are separated and clamped on a steel cap of the strain insulator string, and under the action of the elastic element 222, the two clamping jaws 221 clamp the steel cap, so that the steel cap is ensured to be fixed reliably and is convenient to disassemble and assemble; after the two clamping jaws 221 clamp the steel cap, the L-shaped buckle 224 and the clamping pin 225 are used for locking, so that the second clamping tool 22 is ensured to be fixed reliably, and the operation risk is reduced.
Referring to fig. 4, as a specific embodiment of the method for replacing the tension insulator single sheet of the ultra-high voltage transmission line provided by the present invention, two ends of the cross beam 11 are respectively provided with a first sliding sleeve 101 slidably connected with the cross beam 11, the top wall of the first sliding sleeve 101 is provided with a first fastening member 105 abutting against the top surface of the cross beam 11, and the two first fixtures 21 are respectively detachably connected with the two first sliding sleeves 101. Set up the position that first fixture 21 can conveniently be adjusted to first sliding sleeve 101, conveniently fix it in the position that strain insulator string does benefit to the operation most, can also avoid arousing the problem that first fixture 21 can't be installed smoothly because of the distance deviation between the strain insulator monolithic, after first sliding sleeve 101 selects suitable position, first fastener 105 of screwing makes the top surface butt of first fastener 105 and crossbeam 11, guarantee that first sliding sleeve 101 can not take place the position change under the artificial state of non-, guarantee operation safety. Referring to fig. 3, the first fixture 21 further has a quick-connect chuck 211, so that the installation and fastening are fast, the efficiency is improved, and the labor intensity is reduced.
Referring to fig. 3, as a specific embodiment of the method for replacing the tension insulator single sheet of the ultra-high voltage transmission line provided by the present invention, the first fixture 21 is further provided with a quick-connection chuck 211, which facilitates disassembly and assembly, improves efficiency, and reduces labor intensity.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The single-chip replacement method for the tension insulator of the ultra-high voltage transmission line is characterized by comprising the following steps of: the method comprises the following steps that an ultrahigh voltage transmission line strain insulator single-piece replacing platform is adopted for operation, and comprises a cross-shaped hanging bracket (1) and a fixture (2) arranged on the cross-shaped hanging bracket (1) and used for clamping a strain insulator string;
the cross-shaped hanger (1) comprises a cross beam (11) and a longitudinal beam (12) hinged to the middle part of the cross beam (11) through a cross joint (13); a sliding assembly (3) is arranged on one side, located on the cross joint (13), of the longitudinal beam (12), and a pulley (4) is connected to the sliding assembly (3);
the clamping devices (2) comprise two first clamping devices (21) which are respectively connected to two ends of the cross beam (11), and second clamping devices (22) which are connected with the longitudinal beam (12) through pull ropes (23); the second fixture (22) and the pulley (4) are respectively positioned on two sides of the cross beam (11);
the method for replacing the tension insulator single sheet of the ultra-high voltage transmission line comprises the following steps:
A. the two first clamping devices (21) are respectively clamped on two steel caps of the same strain insulator string, the single insulator to be replaced is ensured to be positioned in the middle of the two first clamping devices (21), and the second clamping device (22) is clamped on one steel cap of the other strain insulator string;
B. pressing one end, connected with the second fixture (22), of the longitudinal beam (12), so that one end, connected with the pulley (4), of the longitudinal beam (12) rises to the highest position, the longitudinal beam (12) is fixed, then connecting a tension insulator single sheet to be replaced with a rope of the pulley (4), detaching the tension insulator single sheet, moving the sliding assembly (3), returning the longitudinal beam (12) to the horizontal position after the pulley (4) moves to the end part of the longitudinal beam (12), keeping the longitudinal beam horizontal, controlling the rope of the pulley (4) by a pulley operator to convey the tension insulator single sheet to the ground, and then returning the longitudinal beam (12) to the horizontal position and fixing;
C. hoisting a new strain insulator single sheet to the highest position through the pulley (4), pressing one end of the longitudinal beam (12) connected with the second fixture (22) to enable one end of the longitudinal beam (12) connected with the pulley (4) to be lifted until the strain insulator single sheet reaches the height convenient for installation, and fixing the longitudinal beam (12);
D. the position of the sliding assembly (3) on the longitudinal beam (12) is moved, the pulley (4) is moved to a position close to a strain insulator single sheet to be installed right above the position, the pull rope (23) is loosened, the longitudinal beam (12) is controlled and one end of the longitudinal beam connected with the pulley (4) slowly descends, the strain insulator single sheet is moved to an installation position, the pull rope (23) is fixed again, and the strain insulator single sheet is taken down from the pulley (4) and installed.
2. The method for replacing the tension insulator single sheet of the ultra-high voltage transmission line according to claim 1, characterized in that: the cross joint (13) comprises:
the connecting sleeve (131) is sleeved in the middle of the cross beam (11) and penetrates through the side wall of the connecting sleeve (131) and the side wall of the cross beam (11) through a connecting shaft (133) to be fixed;
two engaging lugs (132), the interval set up in the top surface of adapter sleeve (131), longeron (12) are located between two engaging lugs (132), and pass through connecting axle (133) two engaging lugs (132), longeron (12) lateral wall is articulated.
3. The method for replacing the tension insulator single sheet of the ultra-high voltage transmission line according to claim 1, characterized in that: the side wall of the longitudinal beam (12) is provided with a rack (32) extending along the length direction; one end face of the rack (32) is close to the end face of the longitudinal beam (12) or is flush with the end face of the longitudinal beam (12);
the sliding assembly (3) comprises a gear (31) meshed and connected with the rack (32) and a sliding shell (30) sleeved on the longitudinal beam (12) and connected with the gear (31) through a rotating shaft (33).
4. The method for replacing the tension insulator single sheet of the ultra-high voltage transmission line according to claim 3, characterized in that: the sliding assembly (3) further comprises a rocking handle (34) connected with one end of a rotating shaft (33) of the gear (31); the rocking handle (34) is positioned outside the sliding shell (30).
5. The single sheet replacing method for the tension insulator of the ultra-high voltage transmission line according to claim 3, wherein the top surface of the sliding shell (30) is provided with at least two groups of supporting wheels (36) which are in rolling contact with the top wall of the longitudinal beam (12);
at least two sets of limiting wheels (37) in rolling contact with the side walls of the longitudinal beams (12) are further arranged in the sliding shell (30), and the limiting wheels (37) are located above the gear (31).
6. The method for replacing the tension insulator single sheet of the ultra-high voltage transmission line according to any one of claims 1 to 5, characterized in that: the distances from the two ends of the longitudinal beam (12) to the cross joint (13) are different; the second fixture (22) is positioned at one end of the longitudinal beam (12) far away from the cross joint (13).
7. The method for replacing the tension insulator single sheet of the ultra-high voltage transmission line according to claim 6, characterized in that: the longitudinal beam (12) is sleeved with a second sliding sleeve (102) in sliding connection with the longitudinal beam, and a second fastening piece (106) abutted to the top surface of the longitudinal beam (12) is arranged on the top wall of the second sliding sleeve (102).
8. The method for replacing the tension insulator single sheet of the ultra-high voltage transmission line according to claim 7, characterized in that: the bottom surface of the second sliding sleeve (102) is provided with a hook (24); the pull rope (23) is an annular chain and comprises a plurality of chain links (203) which are connected in pairs, and any chain link (203) can be hung on the hook (24).
9. The method for replacing the tension insulator single chip of the ultra-high voltage transmission line according to claim 1, wherein the second fixture (22) comprises:
the two jaws (221) are hinged through a pin shaft (223);
the two ends of the elastic element (222) are respectively connected with the positions, close to the pin shaft (223), of the two clamping jaws (221);
and one end of the L-shaped buckle (224) is hinged with one clamping jaw (221), and the other end of the L-shaped buckle is hung with a clamping pin (225) arranged on the other clamping jaw (221).
10. The method for replacing the tension insulator single sheet of the ultra-high voltage transmission line according to claim 1, characterized in that: crossbeam (11) both ends are equipped with respectively the cover rather than sliding connection's first sliding sleeve (101), the roof of first sliding sleeve (101) be equipped with first fastener (105) of crossbeam (11) top surface butt, two first fixture (21) respectively with two first sliding sleeve (101) can be dismantled and be connected.
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| CN110581455B (en) * | 2019-08-29 | 2024-04-05 | 中国南方电网有限责任公司超高压输电公司昆明局 | Automatic replacement device for overhead suspension insulator |
| CN112249950A (en) * | 2020-11-05 | 2021-01-22 | 国网湖南省电力有限公司 | Hanging bracket and method for live replacement of any insulator of extra-high voltage strain insulator string |
| CN113013783B (en) * | 2021-02-24 | 2022-11-04 | 国网甘肃省电力公司陇南供电公司 | Power insulator maintenance construction system and construction method |
| CN115149455B (en) * | 2022-05-13 | 2024-10-01 | 国网江苏省电力有限公司超高压分公司 | Tool and method for replacing tension insulator of extra-high voltage line |
| CN114899759B (en) * | 2022-06-24 | 2024-01-19 | 国网湖北省电力有限公司超高压公司 | Operation method for robot live replacement of high-voltage transmission line insulator |
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