CN117373759A - Device for preventing insulator string of high-voltage transmission line from windage yaw flashover - Google Patents
Device for preventing insulator string of high-voltage transmission line from windage yaw flashover Download PDFInfo
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- CN117373759A CN117373759A CN202311242273.2A CN202311242273A CN117373759A CN 117373759 A CN117373759 A CN 117373759A CN 202311242273 A CN202311242273 A CN 202311242273A CN 117373759 A CN117373759 A CN 117373759A
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- connecting piece
- insulator string
- transmission line
- deflection
- flashover
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- 239000012212 insulator Substances 0.000 title claims abstract description 91
- 230000005540 biological transmission Effects 0.000 title claims abstract description 56
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 230000005484 gravity Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/02—Suspension insulators; Strain insulators
- H01B17/04—Chains; Multiple chains
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/38—Fittings, e.g. caps; Fastenings therefor
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Abstract
A device for preventing wind deflection flashover of an insulator string of a high-voltage transmission line belongs to the field of high-voltage transmission lines. In order to solve the problem of windage yaw flashover, the device adopts a heavy hammer mode, and can block certain wind load, but also can increase the weight of an insulator chain and increase the bearing load for a power transmission tower pole. The invention comprises a cross arm connecting piece, an insulator string I, an anti-deflection connecting piece, an insulator string II and a power transmission line connecting piece; the cross arm connecting piece is arranged on the cross arm, the top end of the first insulator string is connected to the cross arm connecting piece, the bottom end of the first insulator string is connected with the top end of the anti-deflection connecting piece, the top end of the second insulator string is connected with the anti-deflection connecting piece in a sliding manner, the bottom end of the second insulator string is hinged with the top end of the power transmission line connecting piece, and the bottom end of the power transmission line connecting piece is fixedly connected to the power transmission line; the anti-deflection connecting piece is provided with a chute, and the top end of the insulator string II is connected in the chute in a sliding way. The invention is mainly used for preventing the electric flashover between the cross arm and the power transmission line.
Description
Technical Field
The invention belongs to the field of electric high-voltage transmission lines, and particularly relates to a device for preventing an insulator string of a high-voltage transmission line from windage yaw flashover.
Background
Windage yaw flashover of a high voltage transmission line affects safe operation of the transmission line. After the transmission line wire is affected by strong wind, the suspension insulator of the linear tower can deflect towards the direction of the transverse line, so that the insulation gap between the wire and the tower is insufficient to cause flashover discharge, the transmission line is in windage fault, and the line is caused to have major hidden trouble in safe operation. At present, common wind deflection prevention measures of a power transmission line are to suspend a heavy hammer on a wire or an insulator string which is easy to generate wind deflection faults so as to block wind deflection load. For example, chinese patent CN109347038B discloses a "wind-proof bias heavy hammer device for high-voltage wire jumper", which comprises a heavy hammer sheet and a wire clamp connecting unit for connecting the heavy hammer sheet and a tower, wherein the heavy hammer sheet is connected with the wire clamp connecting unit through a ball head and a bowl head which are matched with each other, the heavy hammer sheet comprises a central rod and a heavy hammer sheet component detachably connected to the periphery of the central rod, each heavy hammer sheet comprises at least one heavy hammer sheet component, and the heavy hammer sheet component is connected with a detachable pulley component. Although the above patent can block certain wind load, the weight of the insulator string is also increased, and the load bearing load is added to the power transmission tower pole.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the existing device for preventing wind deflection flashover adopts a heavy hammer mode, and can block certain wind load, but also can increase the weight of an insulator chain and increase the bearing load for a power transmission tower pole. And further provides a device for preventing the insulator string of the high-voltage transmission line from windage yaw flashover.
The invention adopts the technical scheme for solving the technical problems that:
the device comprises a cross arm connecting piece, a first insulator string, a deflection preventing connecting piece, a second insulator string and a power transmission line connecting piece which are sequentially connected from top to bottom; the cross arm connecting piece is fixedly arranged on the cross arm, the top end of the first insulator string is hinged to the cross arm connecting piece, the bottom end of the first insulator string is connected with the top end of the anti-deflection connecting piece, the top end of the second insulator string is connected with the anti-deflection connecting piece in a sliding manner, the bottom end of the second insulator string is hinged to the top end of the power transmission line connecting piece, and the bottom end of the power transmission line connecting piece is fixedly connected to the power transmission line;
the anti-deflection connecting piece is provided with a chute, two ends of the chute extend upwards, the middle of the chute extends downwards, and the top end of the insulator string II is connected in the chute in a sliding way.
Preferably, the sliding groove is an arc-shaped sliding groove.
Preferably, the sliding groove is a V-shaped sliding groove.
Preferably, the anti-deflection connecting piece is in a plate shape, a threaded cylinder is arranged at the top end of the anti-deflection connecting piece, a threaded column is arranged at the bottom end of the insulator string I, and the anti-deflection connecting piece and the insulator string I are fixedly connected through the cooperation of the threaded cylinder and the stud.
Preferably, the anti-deflection connecting piece is in a plate shape, the top end of the anti-deflection connecting piece is hinged with the bottom end of the first insulator string, two groups of telescopic push rods taking the central axis of the first insulator string as the central line are symmetrically arranged between the two groups of telescopic push rods, and the two groups of telescopic push rods are arranged along the extending direction of the cross arm.
Preferably, one end of the telescopic push rod is hinged to the bottom end of the first insulator string, and the other end of the telescopic push rod is hinged to one side, close to the edge, of the top of the anti-deflection connecting piece.
Preferably, the two ends of the anti-deflection connecting piece are respectively provided with a baffle at the position close to the edge, one end of the telescopic push rod is fixedly connected to the bottom end of the insulator string I, and the other end of the telescopic push rod is abutted to the included angle between the baffle of the anti-deflection connecting piece and the top surface.
Preferably, the telescopic push rod is an electric cylinder.
Preferably, the cross arm is also provided with a anemoscope.
Preferably, the anti-deflection connecting piece is made of ceramic materials.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through the design of the anti-deflection connecting piece, the upward moving distance of the insulator string below is smaller even in the weather of strong wind, so that the distance between the cross arm and the power transmission line is always larger than the distance for generating electric flashover.
2. In order to enable the downward moving distance of the insulator string below to be larger, the sliding grooves on the anti-deflection connecting piece adopt V-shaped sliding grooves with larger included angles, and deflection and homing are realized under the cooperation of the two groups of telescopic push rods.
3. The utility model has the advantages of simple structure, light weight and smaller weight load born by the cross arm.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this application.
Fig. 1 is a schematic view of the state of example 1 in windless weather.
Fig. 2 is a schematic diagram showing the state of example 1 in windy weather.
Fig. 3 is a schematic view of the state of example 2 in windless weather.
Fig. 4 is a schematic diagram showing the state of example 2 in windy weather.
Fig. 5 is a schematic view of the state of example 3 in windless weather.
Fig. 6 is a schematic diagram showing the state of example 3 in windy weather.
FIG. 7 is a schematic diagram showing a comparison of insulator strings connected in series up and down in windy weather with and without anti-sway connectors.
FIG. 8 is a schematic diagram showing the comparison of the lowest position of the lower insulator string with the chute on the anti-sway connection in different radians.
Reference numerals illustrate: 1-a cross arm connector; 2-insulator string I; 3-anti-sway connection; 3-1-sliding grooves; 3-2-baffle plates; 4-insulator string II; 5-a power line connection; 6-a cross arm; 7-a power transmission line; 8-telescopic push rod.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
The utility model provides a solve insulator chain take place the beat of great angle under the effect of wind-force load, and lead to taking place the flashover between cross arm and the high tension transmission line, influence the problem of normal power supply.
The application will be described with reference to 3 examples:
example 1:
referring to fig. 1 and fig. 2, an embodiment of the present application provides a device for preventing an insulator string of a high-voltage power transmission line from windage yaw flashover, which includes a cross arm connecting piece 1, an insulator string one 2, an anti-yaw connecting piece 3, an insulator string two 4 and a power transmission line connecting piece 5 that are sequentially connected from top to bottom; the cross arm connecting piece 1 is fixedly arranged on the cross arm 6, the top end of the first insulator string 2 is hinged to the cross arm connecting piece 1, the bottom end of the first insulator string 2 is connected with the top end of the anti-deflection connecting piece 3, the top end of the second insulator string 4 is slidably connected with the anti-deflection connecting piece 3, the bottom end of the second insulator string 4 is hinged to the top end of the power transmission line connecting piece 5, and the bottom end of the power transmission line connecting piece 5 is fixedly connected to the power transmission line 7;
the anti-deflection connecting piece 3 is of a plate-shaped structure made of ceramic materials, a threaded cylinder is arranged at the top end of the anti-deflection connecting piece 3, a threaded column is arranged at the bottom end of the insulator string I2, and the anti-deflection connecting piece 3 is fixedly connected with the insulator string I2 through the cooperation of the threaded cylinder and a stud; the anti-deflection connecting piece 3 is provided with an arc-shaped chute 3-1, and the top end of the insulator string II 4 is connected in the chute 3-1 in a sliding way.
In this embodiment, the anti-deflection connecting piece 3 is designed into a plate shape, so that the function of the insulator string is not affected, and meanwhile, the weight is lighter, and the bearing load of the cross arm is not increased.
In this embodiment, when strong wind blows the wires to cause the upper and lower two insulator strings to deflect, the first insulator string 2 drives the deflection preventing connecting piece 3 to deflect, and because the top end of the second insulator string 4 is slidably connected in the arc-shaped chute 3-1 of the deflection preventing connecting piece 3, the second insulator string 4 slides to a lower position along the arc-shaped chute 3-1 under the self gravity and the gravity of the power transmission line 7, as shown in fig. 7, the distance between the cross arm 6 and the power transmission line 7 is larger than that between the first insulator string 2 and the second insulator string 4 which are normally hinged together, so that electric flashover between the cross arm 6 and the power transmission line 7 can be prevented.
Example 2:
the difference between this embodiment and embodiment 1 is that, as shown in fig. 3 and 4, the chute 3-1 is a V-shaped chute, and the included angle of the chute 3-1 is 150 °; because the included angle of the sliding chute 3-1 is larger, after the side sway occurs in the windy weather, the insulator string two 4 slides to the lowest position along the sliding chute 3-1 under the gravity of the insulator string two and the gravity of the power transmission line 7, the state is shown in fig. 4, when the wind force weakens or stops, in order to prevent the anti-deflection connecting piece 3 from being unable to return, two groups of telescopic push rods 8 taking the central axis of the insulator string one 2 as the central line are symmetrically arranged between the anti-deflection connecting piece 3 and the insulator string one 2, and the two groups of telescopic push rods 8 are arranged along the extending direction of the cross arm 6; one end of the telescopic push rod 8 is hinged to the bottom end of the insulator string I2, and the other end of the telescopic push rod 8 is hinged to one side, close to the edge, of the top of the anti-deflection connecting piece 3.
In the embodiment, in windless weather, the lengths of the two groups of telescopic push rods 8 extending out are the same, the anti-deflection connecting piece 3 is in a horizontal state, when the anemoscope monitors that the weather is strong, one group of telescopic push rods 8 extend, the other group of telescopic push rods 8 shorten, so that the anti-deflection connecting piece 3 swings sideways, the swinging direction is consistent with the wind direction, and the insulator string II 4 slides to the lowest position along the sliding groove 3-1 under the gravity of the insulator string II and the gravity of the power transmission line 7; when the anemoscope detects that the wind force weakens, the two groups of telescopic push rods 8 return to drive the anti-deflection connecting piece 3 to return to the original position, and the cross arm 6 and the power transmission line 7 are located at a safe distance.
In this embodiment, the chute 3-1 adopts a V-shaped groove with a larger included angle, and after the anti-sway connecting piece 3 sway laterally, the distance that the insulator string two 4 descends is more, so the distance between the cross arm 6 and the power transmission line 7 is larger than the distance between the insulator string two 4 and the insulator string two 2 which are normally hinged together, and further, the electric flashover between the cross arm 6 and the power transmission line 7 can be prevented.
Example 3:
the difference between this embodiment and embodiment 2 is that, as shown in fig. 5 and 6, a baffle 3-2 is respectively disposed at the positions of the two ends of the anti-deflection connecting piece 3 near the edges, one end of the telescopic push rod 8 is fixedly connected to the bottom end of the insulator string one 2, and the other end of the telescopic push rod 8 is abutted to the included angle between the baffle 3-2 of the anti-deflection connecting piece 3 and the top surface.
In the embodiment, in windless weather, the lengths of the two groups of telescopic push rods 8 extending out are the same and are abutted to the included angle between the baffle 3-2 of the anti-deflection connecting piece 3 and the top surface, the anti-deflection connecting piece 3 is in a horizontal state, when the anemoscope monitors that the wind direction is also monitored in windy weather, the two groups of telescopic push rods 8 are shortened, braking force is not generated on the anti-deflection connecting piece 3 any more, the insulator string I2 and the anti-deflection connecting piece 3 swing sideways, the swinging direction is consistent with the wind direction, and the insulator string II 4 slides to the lowest position along the sliding groove 3-1 under the gravity of the insulator string II and the gravity of the power transmission line 7; when the anemoscope detects that the wind force weakens, two groups of telescopic push rods 8 extend out by the same length, wherein one group of telescopic push rods 8 generates thrust to the deflection-preventing connecting piece 3 which deflects and drives the deflection-preventing connecting piece 3 to return, and at the moment, the cross arm 6 and the power transmission line 7 are located at a safe distance.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.
Claims (10)
1. The utility model provides a device that insulator chain of high tension transmission line prevent wind off-set flashover which characterized in that: the device comprises a cross arm connecting piece (1), an insulator string I (2), an anti-deflection connecting piece (3), an insulator string II (4) and a power transmission line connecting piece (5) which are sequentially connected from top to bottom; the cross arm connecting piece (1) is fixedly arranged on the cross arm (6), the top end of the insulator string I (2) is hinged on the cross arm connecting piece (1), the bottom end of the insulator string I (2) is connected with the top end of the anti-deflection connecting piece (3), the top end of the insulator string II (4) is slidably connected with the anti-deflection connecting piece (3), the bottom end of the insulator string II (4) is hinged with the top end of the power transmission line connecting piece (5), and the bottom end of the power transmission line connecting piece (5) is fixedly connected on the power transmission line (7);
the anti-deflection connecting piece (3) is provided with a chute (3-1), two ends of the chute (3-1) extend upwards, the middle of the chute extends downwards, and the top end of the insulator string II (4) is connected in the chute (3-1) in a sliding mode.
2. The device for preventing wind deflection flashover of an insulator string of a high voltage transmission line according to claim 1, wherein: the chute (3-1) is an arc chute.
3. The device for preventing wind deflection flashover of an insulator string of a high voltage transmission line according to claim 1, wherein: the sliding groove (3-1) is a V-shaped sliding groove, and the included angle of the sliding groove (3-1) is 150 degrees.
4. The device for preventing wind deflection flashover of an insulator string of a high voltage transmission line according to claim 1, wherein: the anti-deflection connecting piece (3) is in a plate shape, a threaded cylinder is arranged at the top end of the anti-deflection connecting piece (3), a threaded column is arranged at the bottom end of the insulator string I (2), and the anti-deflection connecting piece (3) and the insulator string I (2) are fixedly connected through the cooperation of the threaded cylinder and the stud.
5. The device for preventing wind deflection flashover of an insulator string of a high voltage transmission line according to claim 1, wherein: the anti-deflection connecting piece (3) is in a plate shape, the top end of the anti-deflection connecting piece (3) is hinged with the bottom end of the insulator string I (2), two groups of telescopic push rods (8) taking the central axis of the insulator string I (2) as a central line are symmetrically arranged between the two groups of telescopic push rods (8) along the extending direction of the cross arm (6).
6. The device for preventing wind deflection flashover of an insulator string of a high voltage transmission line according to claim 5, wherein: one end of the telescopic push rod (8) is hinged to the bottom end of the insulator string I (2), and the other end of the telescopic push rod (8) is hinged to one side, close to the edge, of the top of the anti-deflection connecting piece (3).
7. The device for preventing wind deflection flashover of an insulator string of a high voltage transmission line according to claim 5, wherein: the anti-deflection connecting piece (3) is characterized in that a baffle (3-2) is arranged at the position, close to the edge, of each of the two ends of the anti-deflection connecting piece (3), one end of the telescopic push rod (8) is fixedly connected to the bottom end of the insulator string I (2), and the other end of the telescopic push rod (8) is abutted to an included angle between the baffle (3-2) of the anti-deflection connecting piece (3) and the top surface.
8. The apparatus for preventing flashover of an insulator string of a high voltage transmission line according to claim 5, 6 or 7, wherein: the telescopic push rod (8) is an electric cylinder.
9. The device for preventing wind deflection flashover of an insulator string of a high voltage transmission line according to claim 8, wherein: and a anemoscope is also arranged on the cross arm (6).
10. The device for preventing wind deflection flashover of an insulator string of a high voltage transmission line according to claim 9, wherein: the anti-deflection connecting piece (3) is made of ceramic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311242273.2A CN117373759A (en) | 2023-09-25 | 2023-09-25 | Device for preventing insulator string of high-voltage transmission line from windage yaw flashover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311242273.2A CN117373759A (en) | 2023-09-25 | 2023-09-25 | Device for preventing insulator string of high-voltage transmission line from windage yaw flashover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117373759A true CN117373759A (en) | 2024-01-09 |
Family
ID=89388282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311242273.2A Pending CN117373759A (en) | 2023-09-25 | 2023-09-25 | Device for preventing insulator string of high-voltage transmission line from windage yaw flashover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117373759A (en) |
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2023
- 2023-09-25 CN CN202311242273.2A patent/CN117373759A/en active Pending
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