CN107425475B - Overhead ground wire lifter and lifting in-place method thereof - Google Patents
Overhead ground wire lifter and lifting in-place method thereof Download PDFInfo
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- CN107425475B CN107425475B CN201710822157.6A CN201710822157A CN107425475B CN 107425475 B CN107425475 B CN 107425475B CN 201710822157 A CN201710822157 A CN 201710822157A CN 107425475 B CN107425475 B CN 107425475B
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- ground wire
- overhead ground
- lifting
- lifter
- leg
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/16—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
- B66C23/166—Simple cranes with jibs which may be fixed or can slew or luff
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
- B66C23/78—Supports, e.g. outriggers, for mobile cranes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Cable Installation (AREA)
Abstract
The invention relates to the technical field of overhead transmission line maintenance, in particular to an overhead ground line lifter and a lifting and positioning method thereof. The overhead ground wire lifter comprises an electric winch and a foot rest, and the overhead ground wire lifter and the lifting and positioning method thereof are provided.
Description
Technical Field
The invention relates to the technical field of maintenance of overhead transmission lines, in particular to an overhead ground line lifter and a lifting and positioning method thereof.
Background
Overhead ground wires are devices that protect overhead transmission lines from lightning strikes. To improve the safety of the line operation, overhead ground wires are typically erected over the protected conductors. When thundercloud discharges to the ground above the line, the lightning channel easily hits the overhead ground wire firstly, so that lightning current enters the ground to protect the normal power transmission of the lead. Meanwhile, the overhead ground wire has an electromagnetic shielding effect, and when thundercloud near the line discharges to the ground, lightning induced overvoltage caused on the lead can be reduced. Therefore, the overhead ground wire must be firmly connected with the tower grounding device so as to ensure that lightning current can be reliably led into the ground after the lightning strike. Important transmission lines typically employ two overhead ground wires to place the protected conductor fully within its protective range.
The overhead ground wire is composed of steel strands because the overhead ground wire does not bear the function of transmitting current. Some transmission lines also use good conductor ground wires, i.e. overhead ground wires made of aluminum alloy or aluminum-clad steel wires. The ground wire has better conductivity, can improve the transmission performance of the line and reduce the interference to the adjacent communication line.
The defects of the overhead ground wire of the power transmission line occur occasionally, when the broken strand of the overhead ground wire is required to be replaced or the ground wire clamp is periodically checked, constructors need to lift the overhead ground wire, loosen the ground wire clamp and perform replacement or checking operation. Due to the structural limitation of the tower, a winch for hoisting the overhead ground wire does not have a proper hanging point, and the problems that the hoisting point is too low and the hoisting is difficult generally exist.
The Chinese patent number '2014103248189' discloses an 'overhead ground wire lifter', a wire reel in the scheme is provided with a wire reel, a wire reel wrench is connected to the wire reel, a rope is wound on the wire reel, a wire lifting hook is connected to a leading-out end of the rope, one end of a telescopic connecting rod is movably connected to the wire reel, the other end of the telescopic connecting rod is connected with a clamping seat, and an adjusting mechanism is arranged on the clamping seat. The wire twisting disc is a regular polygon. The bobbin is a square shaft. The wire twisting disc is movably connected with the telescopic connecting rod through bolts and nuts. The clamping seat is in a right-angle U shape. The adjusting mechanism is as follows: the gasket I and the gasket II are symmetrically arranged on the inner surface of the clamping seat, and the gasket I is connected with the adjusting screw. The scheme aims to solve the problems of low efficiency and potential safety hazard of manual wire lifting.
Overhead earth wire lifter during operation needs to be followed the insulating rope by the staff on the tower and mentioned more than ten meters height, then installs on the overhead earth wire support, because the dead weight of lifting the line ware is great, whole promotion installation process is consuming time, still has the hidden danger that the accident drops.
Disclosure of Invention
The invention aims to provide an overhead ground wire lifter and a lifting and positioning method thereof, aiming at the problems that the lifting point of a winch for lifting an overhead ground wire is too low and the lifting is difficult, and the overhead ground wire lifter has large self weight and is inconvenient to lift and position, the winch structure is improved, the lifting method is optimized, the problem that the conventional overhead ground wire is difficult to lift and maintain is solved, the convenience of operation on a tower is improved, the labor intensity is reduced, and the maintenance efficiency of the overhead ground wire is improved.
In order to achieve the above object, the technical solution of the present invention is as follows:
a method for lifting and positioning an overhead ground wire lifter is characterized in that the overhead ground wire lifter is automatically lifted to a ground wire bracket along a lifting belt by utilizing the self power of the lifting belt and the overhead ground wire lifter, and finally the overhead ground wire lifter is turned to be positioned by an operator on a tower and fixed on the ground wire bracket, and the method comprises the following specific operation steps:
1) The loop overhead conductor is broken, and one end of an operator on the tower with a lifting belt climbs a ground wire bracket;
2) Two ends of the lifting belt are of a bifurcation structure, and operators on the tower respectively and firmly connect two belt heads at one end of the lifting belt to bolts at two sides of the angle steel of the ground wire bracket;
3) Moving the overhead ground wire lifter to the ground below the overhead ground wire bracket, and fixing the other end of a lifting belt to a rope wheel of an electric winch of the overhead ground wire lifter by penetrating a notch on a foot stool of the overhead ground wire lifter so that the lifting belt is wound on the outer sides of a steel wire rope and a lifting hook on the rope wheel;
4) Starting a direct current motor on the overhead ground wire lifter, and continuously lifting the overhead ground wire lifter along the lifting belt along with the continuous winding of the lifting belt on the rope pulley to slowly approach the overhead ground wire support;
5) When the overhead ground wire lifter rises to the position below the end head of the overhead ground wire bracket, the direct current motor stops;
6) An operator on the tower holds the electric winch, and turns and drags the electric winch upwards until the notch is led in from the end of the angle steel of the ground wire bracket;
7) Nuts on the first connecting rod and the second connecting rod are fastened until the foot rest is connected with the overhead ground wire support in a fastening mode;
8) Rotating the direct current motor reversely, and detaching one end of the lifting belt from the rope pulley, so that a lifting hook on the rope pulley can be operated to carry out maintenance operation;
9) After the overhead ground wire maintenance work is finished, fixing the other end of the lifting belt to the rope pulley again, and starting the direct current motor to wind the lifting belt on the rope pulley;
10 Loosening nuts on the first connecting rod and the second connecting rod, pushing the electric winch to the end of the overhead ground wire support until the electric winch is separated from the overhead ground wire support and suspended on a lifting belt;
11 The electric capstan slowly falls to the ground;
12 Operator on the tower removes one end of the lifting belt and throws it down;
13 The operation ends.
The electric capstan comprises a capstan base, a rope pulley, a steel wire rope, a lifting hook, a first shaft and a direct current motor, wherein the first shaft is arranged in an inner hole of the rope pulley, two ends of the first shaft are respectively connected with the capstan base, one side of the rope pulley is connected with a worm wheel, a worm meshed with the worm wheel is arranged on a second shaft, one end of the second shaft is connected with a first bevel gear, the second bevel gear meshed with the first bevel gear is arranged on a third shaft, and the direct current motor is arranged at one end of the third shaft.
The foot rest comprises an upper bearing seat, a first leg, a second leg, a first end plate, a second end plate, a first connecting rod and a second connecting rod, the upper bearing seat is connected to the end portion of the same side of the first leg and the end portion of the same side of the second leg, the first end plate is connected to the end portion of the other side of the first leg, the second end plate is connected to the end portion of the other side of the second leg, the two ends of the first connecting rod are connected with the first end plate and the second end plate through bolts and nuts respectively, the two ends of the second connecting rod are connected with the first end plate and the second end plate through bolts and nuts respectively, and a notch matched with the shape of the angle steel of the overhead ground wire support is formed between the first leg, the second leg, the first connecting rod and the second connecting rod.
The first leg and the second leg are both 90-degree buckling structures made of square steel pipes, and supporting rods are arranged at the 90-degree buckling positions.
And after the notch is connected with the overhead ground wire bracket angle steel, the height of the center of the rope wheel above the bottom edge H of the notch is 350-550 mm.
Compared with the prior art, the invention has the beneficial effects that:
1) Aiming at the problems that the dead weight of the electric winch is large and the lifting is inconvenient to take place, the problem that the existing overhead ground wire is difficult to lift and maintain is solved by optimizing the lifting method, and the convenience of operation on the tower is improved.
2) The worm gear and worm speed reducing mechanism is adopted, the structure is simple, the layout is compact, the performance is stable, the wire lifting operation requirement of the overhead ground wire can be completely met, the operation is convenient, and the time and the labor are saved.
3) By taking the overhead ground wire bracket as a hanging point, the height of the hanging point is effectively improved, so that the overhead ground wire can be hung by one operator on the tower, the labor intensity is reduced, and the operation safety coefficient and efficiency are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of an overhead ground wire lifter according to an embodiment of the invention;
FIG. 2 is a view taken along line A of FIG. 1;
fig. 3 is a schematic view of an overhead ground wire clamp configuration;
fig. 4 is a schematic diagram of an embodiment of an overhead ground wire lifter of the present invention in an automatic lifting and seating state;
fig. 5 is a schematic view of an end structure of an embodiment of a lifting belt of the present invention.
In the figure: the ground wire lifting device comprises a winch base 1, a rope pulley 2, a steel wire rope 3, a lifting hook 4, a first shaft 5, a first overhead ground wire 6, a worm wheel 7, a worm 8, a second shaft 9, a first bevel gear 10, a second bevel gear 11, a third shaft 12, a foot stool 13, an upper bearing seat 14, a bolt 15, a nut 16, a notch 17, a reinforcing connector 18, a support rod 19, an overhead ground wire support angle steel 20, a direct current motor 21, a battery box 22, a control box 23, a remote controller 24, an overhead ground wire clamp 25, a lifting belt 26 and an overhead ground wire lifter 27.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
fig. 1 is a schematic structural view of an embodiment of an overhead ground wire lifter of the invention, which is composed of an electric capstan and a foot rest, wherein the electric capstan comprises a capstan base 1, a rope pulley 2, a steel wire rope 3, a hook 4, a first shaft 5 and a direct current motor 21, the first shaft 5 is arranged in an inner hole of the rope pulley 2, two ends of the first shaft 5 are respectively connected with the capstan base 1, one side of the rope pulley 2 is connected with a worm wheel 7, a worm 8 meshed with the worm wheel is arranged on a second shaft 9, one end of the second shaft is connected with a first bevel gear 10, a second bevel gear 11 meshed with the first bevel gear is arranged on a third shaft 12, and one end of the third shaft is provided with the direct current motor 21;
the bottom of the winch base 1 is connected with a foot stand 13, the foot stand comprises an upper base 14, a first leg 131, a second leg 132, a first end plate 141, a second end plate 142, a first connecting rod 151 and a second connecting rod 152, the upper base 14 is connected to the end portions of the first leg 131 and the second leg 132 on the same side, the first end plate 141 is connected to the end portion of the first leg 131 on the other side, the second end plate 142 is connected to the end portion of the second leg 132 on the other side, two ends of the first connecting rod 151 are connected with the first end plate 141 and the second end plate 142 through bolts 15 and nuts 16 respectively, two ends of the second connecting rod 152 are connected with the first end plate 141 and the second end plate 142 through bolts 15 and nuts 16 respectively, and a notch 17 matched with the shape of the overhead ground wire support angle steel is defined by the first leg 131, the second leg 132, the first connecting rod 151 and the second connecting rod 152.
A reinforcing connector 18 is provided between the first leg 131 and the second leg 132. The first leg 131 and the second leg 132 are both 90-degree buckling structures made of square steel tubes, and the 90-degree buckling positions are connected with the supporting rods 19 in a welding mode. The reinforcing connecting body 18 and the support rod 19 can improve the structural strength and rigidity of the first leg 131 and the second leg 132, and ensure that the first leg 131 and the second leg 132 are not deformed when being stressed.
The dc motor 21 is powered by a lithium battery and a battery pack 22 is located on the back side of the upper shoe 14 of the horse. The direct current motor is provided with a control box 23, ascending, descending and stopping buttons are arranged on the control box, a GSM/GPRS wireless communication module is arranged in the control box, the wireless communication module is communicated with a remote controller 24, and the remote controller 24 can be operated by ground personnel.
Referring to fig. 2 and 3, when the overhead ground wire lifter is applied, the center of the rope pulley 2 is 350-550 mm higher than the bottom edge H of the notch after the notch 17 is connected with the angle steel 20 of the overhead ground wire bracket. The slot 17 can translate along the overhead ground wire bracket angle 20 until the hook is positioned above the overhead ground wire clamp 25, and then the overhead ground wire 6 can be hooked for wire lifting.
Referring to fig. 4, the method for lifting and positioning the overhead ground wire lifter of the present invention is to utilize the self power of the lifting belt 26 and the overhead ground wire lifter 27 to automatically lift the overhead ground wire lifter onto the ground wire bracket 20 along the lifting belt, and finally turn over and position the overhead ground wire lifter by the operator on the tower to fix the overhead ground wire lifter onto the ground wire bracket, so as to start the wire lifting operation, and the specific operation steps are as follows:
1) The loop overhead conductor is broken, and an operator on the tower with one end of the lifting belt climbs the ground wire bracket;
2) Referring to fig. 5, the two ends of the lifting belt are of a bifurcated structure, and operators on the tower respectively and firmly connect the two belt heads at one end of the lifting belt 26 to bolts at the two sides of the angle steel 20 of the ground wire bracket;
3) Moving the overhead ground wire lifter 27 to the lower part of the overhead ground wire bracket, enabling the other end of the lifting belt to penetrate through a notch on a foot rest of the lifting belt and be fixed on a rope wheel of an electric winch, locking the other end of the lifting belt by using a bolt, and winding the lifting belt on the outer sides of a steel wire rope and a lifting hook on the rope wheel;
4) Starting a direct current motor on the overhead ground wire lifter, and continuously winding the lifting belt on the rope pulley, wherein the overhead ground wire lifter 27 continuously rises along the lifting belt and slowly approaches the overhead ground wire bracket;
5) When the overhead ground wire lifter rises to the position below the end of the overhead ground wire bracket, the direct current motor stops;
6) Operators on the tower hold the overhead ground wire lifter, and flip and drag the overhead ground wire lifter upwards until a notch on a foot rest of the overhead ground wire lifter is led in from the end of the angle steel of the ground wire bracket;
7) Nuts on the first connecting rod and the second connecting rod are fastened until the foot rest is fixedly connected with the overhead ground wire support;
8) Rotating the direct current motor reversely, and separating one end of the lifting belt from the rope wheel, so that a lifting hook on the rope wheel can be controlled to start a wire lifting operation for maintenance operation;
9) After the overhead ground wire maintenance work is finished, fixing the other end of the lifting belt to the rope pulley again, and starting the direct current motor to wind the lifting belt on the rope pulley;
10 Nuts on the first connecting rod and the second connecting rod are loosened, and the overhead ground wire lifter 27 is pushed to the end of the overhead ground wire bracket until the overhead ground wire lifter is separated from the overhead ground wire bracket and is suspended on a lifting belt;
11 ) reversely rotating the direct current motor, slowly dropping the overhead ground wire lifter to the ground;
12 Operator on the tower removes one end of the lifting belt and throws it down;
13 The operation ends.
The above embodiments are merely specific examples selected for illustrating the objects, technical solutions and advantages of the present invention in detail, and should not be construed as limiting the scope of the present invention, and various modifications, equivalent substitutions and improvements can be made without departing from the spirit and principle of the present invention.
Claims (4)
1. The lifting and positioning method of the overhead ground wire lifter is characterized in that the self power of a lifting belt and the overhead ground wire lifter is utilized to automatically lift the overhead ground wire lifter onto a ground wire bracket along the lifting belt, and finally, an operator on a tower turns over to position the overhead ground wire lifter to fix the overhead ground wire lifter onto the ground wire bracket, and the method comprises the following specific operation steps: the overhead ground wire lifter comprises an electric winch and a foot rest, the electric winch comprises a winch base, a rope pulley, a steel wire rope, a lifting hook, a first shaft and a direct current motor, the first shaft is arranged in an inner hole of the rope pulley, two ends of the first shaft are respectively connected with the winch base, one side of the rope pulley is connected with a worm wheel, a worm meshed with the worm wheel is arranged on a second shaft, one end of the second shaft is connected with a first bevel gear, a second bevel gear meshed with the first bevel gear is arranged on a third shaft, and one end of the third shaft is provided with the direct current motor;
1) The loop overhead conductor is broken, and an operator on the tower with one end of the lifting belt climbs the ground wire bracket;
2) Two ends of the lifting belt are of a bifurcation structure, and operators on the tower respectively and firmly connect two belt heads at one end of the lifting belt to bolts at two sides of the angle steel of the ground wire bracket;
3) Moving the overhead ground wire lifter to the ground below the overhead ground wire bracket, and fixing the other end of a lifting belt to a rope wheel of an electric winch of the overhead ground wire lifter by penetrating a notch on a foot stool of the overhead ground wire lifter so that the lifting belt is wound on the outer sides of a steel wire rope and a lifting hook on the rope wheel;
4) Starting a direct current motor on the overhead ground wire lifter, and continuously lifting the overhead ground wire lifter along the lifting belt along with the continuous winding of the lifting belt on the rope pulley to slowly approach the overhead ground wire support;
5) When the overhead ground wire lifter rises to the position below the end of the overhead ground wire bracket, the direct current motor stops;
6) An operator on the tower holds the electric winch and turns the electric winch upwards to drag the electric winch until the notch is led in from the end of the angle iron of the ground wire bracket;
7) Nuts on the first connecting rod and the second connecting rod are fastened until the foot rest is fixedly connected with the overhead ground wire support;
8) Rotating the direct current motor reversely, and detaching one end of the lifting belt from the rope pulley, so that a lifting hook on the rope pulley can be operated to carry out maintenance operation;
9) After the overhead ground wire maintenance work is finished, fixing the other end of the lifting belt to the rope pulley again, and starting the direct current motor to wind the lifting belt on the rope pulley;
10 Loosening nuts on the first connecting rod and the second connecting rod, pushing the electric winch to the end of the overhead ground wire support until the electric winch is separated from the overhead ground wire support and is suspended on a lifting belt;
11 The electric capstan slowly falls to the ground;
12 Operator on the tower removes one end of the lifting belt and throws it down;
13 The operation ends.
2. The method for lifting the overhead ground wire lifter in place according to claim 1, wherein the foot rest comprises an upper bearing seat, a first leg, a second leg, a first end plate, a second end plate, a first connecting rod and a second connecting rod, the upper bearing seat is connected to the ends of the first leg and the second leg on the same side, the first end plate is connected to the end of the first leg on the other side, the second end plate is connected to the end of the second leg on the other side, two ends of the first connecting rod are respectively connected with the first end plate and the second end plate through bolts and nuts, two ends of the second connecting rod are respectively connected with the first end plate and the second end plate through bolts and nuts, and notches matched with the shape of the angle steel of the overhead ground wire support are formed among the first leg, the second leg, the first connecting rod and the second connecting rod.
3. The method for lifting and positioning the overhead ground wire lifter according to claim 2, wherein the first leg and the second leg are both of a 90-degree buckling structure made of square steel tubes, and a support rod is arranged at the 90-degree buckling position.
4. The method for lifting the overhead ground wire lifter into position as claimed in claim 1, wherein after the notch is connected with the overhead ground wire bracket angle steel, the height of the center of the rope pulley above the bottom edge H of the notch is 350-550 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710822157.6A CN107425475B (en) | 2017-09-13 | 2017-09-13 | Overhead ground wire lifter and lifting in-place method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710822157.6A CN107425475B (en) | 2017-09-13 | 2017-09-13 | Overhead ground wire lifter and lifting in-place method thereof |
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| CN107425475A CN107425475A (en) | 2017-12-01 |
| CN107425475B true CN107425475B (en) | 2023-04-07 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108383009A (en) * | 2018-03-08 | 2018-08-10 | 辽宁工业大学 | A kind of architectural electricity construction lifting gear |
| CN110867767A (en) * | 2019-10-22 | 2020-03-06 | 云南电网有限责任公司曲靖供电局 | Auxiliary device for replacing 500kV heavy-load linear insulator string in electrified manner |
| CN112834537B (en) * | 2021-01-29 | 2024-03-22 | 四川赛康智能科技股份有限公司 | X-ray live detection method based on ground potential power transmission line |
| CN113612160B (en) * | 2021-09-10 | 2023-05-02 | 亿嘉和科技股份有限公司 | Winch operation tool for bypass cable lapping and operation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102237655A (en) * | 2011-07-05 | 2011-11-09 | 河南省电力公司洛阳供电公司 | Method and tool for lifting overhead ground wire |
| CN202183573U (en) * | 2011-07-05 | 2012-04-04 | 河南省电力公司洛阳供电公司 | Rocker type two-point lifting tool of overhead ground wire |
| CN104064996B (en) * | 2014-07-09 | 2017-01-25 | 国家电网公司 | Lifting device for overhead ground wires |
| CN104953507A (en) * | 2015-06-30 | 2015-09-30 | 国网山东招远市供电公司 | Device and method for lifting wire during distribution line construction |
| CN207381860U (en) * | 2017-09-13 | 2018-05-18 | 国网辽宁省电力有限公司鞍山供电公司 | A kind of overhead earth wire lifter |
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