CN210468736U - Power transmission line windage yaw flashover prevention flexible damping device - Google Patents
Power transmission line windage yaw flashover prevention flexible damping device Download PDFInfo
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- CN210468736U CN210468736U CN201921594291.6U CN201921594291U CN210468736U CN 210468736 U CN210468736 U CN 210468736U CN 201921594291 U CN201921594291 U CN 201921594291U CN 210468736 U CN210468736 U CN 210468736U
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Abstract
The utility model relates to a power grid disaster prevention and reduction technical field refers in particular to a transmission line prevent wind flexible damping device of partial flashover, including pillar type composite insulator chain one and pillar type composite insulator chain two, the one end of pillar type composite insulator chain one is fixed in on the shaft tower through ring flange one to just facing shaft tower cross arm below wire clamp, the other end of pillar type composite insulator chain one is equipped with ring flange two and flexible damping subassembly, the one end of pillar type composite insulator chain two is fixed in on the ring flange two through fastener, the other end of pillar type composite insulator chain two is fixed in on the shaft tower through U type ring. Adopt such structure setting, effectively overcome prior art's not enough, the device is rational in infrastructure, and the construction of being convenient for does not change shaft tower self structure, and it can effectively solve current transmission line and shorten the problem that leads to windage yaw flashover because of insulation distance under the high wind effect, can also delay transmission line gold utensil wearing and tearing simultaneously.
Description
Technical Field
The utility model relates to a power grid disaster prevention and reduction technical field refers in particular to a transmission line prevent wind flexible damping device of partial flashover.
Background
A large number of overhead transmission lines and other power transmission and transformation equipment in a power grid are exposed to the atmospheric environment for a long time, and the operation safety of the equipment is directly related to the operation safety of a power system. According to statistics, over 300 times of windage yaw discharge occurs on 110kV and above lines of national grid companies in recent three years, wherein 50 times of windage yaw discharge occurs on 500kV lines; multiple windage yaw flashover accidents also occur in 500kV lines of southern power grid companies. The windage yaw flashover accident is a major potential safety hazard for normal operation of a power grid, the success rate of reclosing of windage yaw flashover tripping is very low, the normal operation of the power grid is seriously influenced, and major economic loss is caused.
The most essential reason for the occurrence of windage yaw discharge flashover at present is that due to the action of strong wind, the air gap distance between a conducting wire and a tower on a power transmission line is reduced under the adverse conditions of insufficient design consideration and the like, and when the electrical strength of the gap distance cannot bear the highest operating voltage of a system, breakdown discharge occurs. Aiming at the essence of windage yaw flashover, the I-shaped insulator string is mainly changed into the V-shaped insulator string, so that the swing amplitude is reduced, but the design of a tower head needs to be changed, the length of a cross arm of a tower is increased, and the tower which is put into operation is difficult to implement.
In view of this, the utility model provides a transmission line prevent wind to flashover flexible damping device partially to satisfy and put into operation the shaft tower and prevent wind to flashover practical application needs partially.
Disclosure of Invention
The utility model provides a not enough to prior art, the utility model provides a transmission line prevents wind drift flashover flexible damping device has overcome above-mentioned prior art not enough, and the device is rational in infrastructure, and the construction of being convenient for does not change shaft tower self structure, and it can effectively solve current transmission line and shorten the problem that leads to wind drift flashover because of insulation distance under the strong wind effect, can also delay transmission line gold utensil wearing and tearing simultaneously.
In order to achieve the above purpose, the utility model discloses the technical scheme who uses as follows:
the utility model provides a transmission line prevent wind flexible damping device that partially flashover, including pillar type composite insulator chain one and pillar type composite insulator chain two, the one end of pillar type composite insulator chain one is fixed in on the shaft tower through flange dish one to face shaft tower cross arm below wire clamp, the other end of pillar type composite insulator chain one is equipped with flange dish two and flexible damping subassembly, the one end of pillar type composite insulator chain two is fixed in on the flange dish two through fastener, the other end of pillar type composite insulator chain two is fixed in on the shaft tower through the U type ring.
Furthermore, the flexible damping assembly comprises a damping device, a piston rod, a rubber pad and a composite material flying claw assembly, the second flange plate is connected with a sleeve, one end of the piston rod is movably arranged in the sleeve, the other end of the piston rod is fixed on one side of the rubber pad, the composite material flying claw assembly is fixed on the other side of the rubber pad, the damping device is sleeved on the piston rod and the sleeve, one end of the damping device is abutted to the second flange plate, and the other end of the damping device is abutted to the rubber pad.
Further, the damping means comprises a flexible shock absorbing spring.
Further, the piston rod comprises a composite material rod or a metal material rod.
Further, the composite material fly claw assembly comprises four composite material fly claws which are arranged in a matched mode.
Further, the fastening device comprises a composite spline bolt or a metal spline bolt.
Furthermore, an included angle is formed between the first support-type composite insulator string and the second support-type composite insulator string, and the range of the included angle between the first support-type composite insulator string and the second support-type composite insulator string is determined through fixed mechanics finite element simulation.
Further, an included angle between the first support column type composite insulator string and the second support column type composite insulator string ranges from 30 degrees to 60 degrees.
Further, the lengths of the first support column type composite insulator string and the second support column type composite insulator string are determined by the radius of a wind deflection clearance circle of a wire of the power transmission line.
An implementation method of a windage yaw flashover prevention flexible damping device for a power transmission line comprises the following steps:
step 1) fixing one end of a first support column type composite insulator string on a tower through a first flange plate to ensure that the first support column type composite insulator string is vertically connected with a tower body of the tower and faces a wire clamp below a cross arm of the tower;
step 2) fixing one end of a second support-type composite insulator string on a tower through a U-shaped ring, fixing the other end of the second support-type composite insulator string on a second flange plate through a fastening device, and enabling the first support-type composite insulator string to be subjected to upward tension through the fastening device so as to prevent the first support-type composite insulator string from swinging;
step 3) when the wire swings windage yaw and swings to one side of the tower, the wire clamp flies to the windage yaw flashover prevention flexible damping device, the wire clamp collides to the rubber pad through the four movable composite material flying claws, the impact force is reduced through the damping device and the piston rod, the potential energy flying to the tower is further offset, and the swinging amplitude of the wire is prevented from exceeding the windage yaw clearance circle safety range;
and 4) after the wire clamp impacts the rubber pad, as the reaction force and the swinging force of the wire clamp swing back towards the side far away from the pole tower, the four movable composite material flying claws reduce the swinging force of the wire clamp, so that the swinging amplitude of the wire clamp is reduced, and the stress hardware fitting of the wire clamp is protected.
The utility model discloses beneficial effect:
1) by installing the windage yaw flashover prevention flexible damping device of the power transmission line, the lead and the wire clamp can be prevented from swinging towards the tower body under the condition of strong wind, and the swinging amplitude of the lead is prevented from exceeding the minimum air insulation distance, so that windage yaw flashover is caused;
2) for V-string insulators and rigid windage yaw prevention devices, the utility model can delay the mechanical abrasion of transmission line hardware;
3) the utility model discloses a simple structure, the practicality is strong, need not change the shaft tower structure, has economic nature.
Drawings
FIG. 1 is a front view of the overall structure of the present invention;
FIG. 2 is a side view of the overall structure of the present invention;
fig. 3 is an enlarged schematic view of the position a in fig. 1.
1. A first support column type composite insulator string; 2. a flexible damping assembly; 3. a damping device; 4. a piston rod; 5. a rubber pad; 6. a composite fly claw assembly; 7. a first flange plate; 8, a U-shaped ring; 9. a support column type composite insulator string II; 10. a fastening device; 11. a second flange plate; 12. a sleeve.
Detailed Description
The technical solution of the present invention will be described below with reference to the accompanying drawings and examples.
As shown in fig. 1 to 3, a transmission line prevent wind flexible damping device of partial flashover, including a support type composite insulator chain 1 and a support type composite insulator chain two 9, a flange dish 7 vertical fixation is passed through on the shaft tower to the one end of a support type composite insulator chain 1 to just face shaft tower cross arm below wire clamp, the other end of a support type composite insulator chain 1 is equipped with flange dish two 11 and flexible damping subassembly 2, the one end of a support type composite insulator chain two 9 is fixed in on flange dish two 11 through fastener 10, the other end of a support type composite insulator chain two 9 is fixed in on the shaft tower through U8. By adopting the structure, one end of the first support-type composite insulator string 1 is vertically fixed on a tower through the first flange 7 and faces a wire clamp below a cross arm of the tower, one end of the second support-type composite insulator string 9 is fixed on the tower through the U-shaped ring 8, the other end of the second support-type composite insulator string 9 is fixed on the second flange 11 through the fastening device 10, and the first support-type composite insulator string 1 is subjected to upward tension through the fastening device 10, so that the first support-type composite insulator string 1 is prevented from swinging.
More specifically, flexible damping assembly 2 includes that damping device 3, piston rod 4, rubber pad 5 fly claw subassembly 6 with combined material, and ring flange two 11 is connected with sleeve pipe 12, and the one end mobilizable of piston rod 4 locates in sleeve pipe 12, and the other end of piston rod 4 is fixed in one side of rubber pad 5, and combined material flies claw subassembly 6 and is fixed in the opposite side of rubber pad 5, and damping device 3 overlaps on piston rod 4 and sleeve pipe 12, and damping device 3's one end is contradicted in ring flange two 11, and damping device 3's the other end is contradicted in rubber pad 5. By adopting the structure, when the lead swings windward and swings to one side of the tower, the lead clamp flies to the windward flashover-proof flexible damping device, the four movable composite material flying claws collide to the rubber pad 5, the impact force is reduced through the damping device 3 and the piston rod 4, the potential energy flying to the tower is further offset, and the swing amplitude of the lead is prevented from exceeding the safety range of the windward gap circle; after the wire clamp strikes the rubber pad 5, because reaction force and self swinging force toward keeping away from the pole tower side back swing, four movable composite material fly claws will reduce the back swing force of wire clamp to reduce the back swing range of wire clamp, protect the atress gold utensil of wire clamp self.
More specifically, the damping means 3 comprise a flexible damping spring.
More specifically, the piston rod 4 comprises a composite material rod or a metal material rod.
More specifically, the composite fly claw assembly 6 includes four composite fly claws arranged in a mating arrangement.
More specifically, the fastening device 10 includes a composite spline bolt or a metal spline bolt.
More specifically, an included angle is formed between the first support-type composite insulator string 1 and the second support-type composite insulator string 9, and the range of the included angle between the first support-type composite insulator string 1 and the second support-type composite insulator string 9 is determined through fixed mechanics finite element simulation.
More specifically, the included angle between the first support-type composite insulator string 1 and the second support-type composite insulator string 9 ranges from 30 degrees to 60 degrees.
More specifically, the lengths of the first support-type composite insulator string 1 and the second support-type composite insulator string 9 are determined by the radius of a windage yaw clearance circle of a transmission line conductor.
An implementation method of a windage yaw flashover prevention flexible damping device for a power transmission line comprises the following steps:
step 1), fixing one end of a support column type composite insulator string I1 on a tower through a flange plate I7, ensuring that the support column type composite insulator string I1 is vertically connected with a tower body of the tower and directly faces a wire clamp below a cross arm of the tower;
step 2) fixing one end of a second support-type composite insulator string 9 on a tower through a U-shaped ring 8, fixing the other end of the second support-type composite insulator string 9 on a second flange plate 11 through a fastening device 10, and enabling a first support-type composite insulator string 1 to be subjected to upward tension through the fastening device 10 to prevent the first support-type composite insulator string 1 from swinging;
step 3) when the wire swings windage yaw and swings to one side of the tower, the wire clamp flies to the windage yaw flashover prevention flexible damping device, the wire clamp collides to the rubber pad 5 through the four movable composite material flying claws, the impact force is reduced through the damping device 3 and the piston rod 4, the potential energy flying to the tower is further offset, and the swinging amplitude of the wire is prevented from exceeding the safety range of the windage yaw clearance circle;
and 4) after the wire clamp impacts the rubber pad 5, as the reaction force and the swinging force of the wire clamp swing back towards the side far away from the pole tower, the four movable composite material flying claws reduce the swinging force of the wire clamp, so that the swinging amplitude of the wire clamp is reduced, and the stress hardware of the wire clamp is protected.
The technical solutions in the embodiments of the present invention have been described above, but the present invention is not limited to the above-mentioned specific embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the scope of the present invention, which is defined by the spirit and the claims of the present invention.
Claims (9)
1. The utility model provides a transmission line prevent wind flexible damping device that partially flashover which characterized in that: the novel tower-type composite insulator string comprises a first support column-type composite insulator string (1) and a second support column-type composite insulator string (9), wherein one end of the first support column-type composite insulator string (1) is fixed on a tower through a first flange plate (7) and faces a wire clamp below a cross arm of the tower, the other end of the first support column-type composite insulator string (1) is provided with a second flange plate (11) and a flexible damping component (2), one end of the second support column-type composite insulator string (9) is fixed on the second flange plate (11) through a fastening device (10), and the other end of the second support column-type composite insulator string (9) is fixed on the tower through a U-shaped ring (8).
2. The flexible damping device for preventing windage yaw and flashover of the power transmission line according to claim 1, characterized in that: flexible damping subassembly (2) fly claw subassembly (6) including damping device (3), piston rod (4), rubber pad (5) and combined material, ring flange two (11) are connected with sleeve pipe (12), the one end mobilizable of piston rod (4) is located in sleeve pipe (12), the other end of piston rod (4) is fixed in one side of rubber pad (5), combined material flies claw subassembly (6) and is fixed in the opposite side of rubber pad (5), damping device (3) cover is on piston rod (4) and sleeve pipe (12), the one end of damping device (3) is contradicted in ring flange two (11), the other end of damping device (3) is contradicted in rubber pad (5).
3. The flexible damping device for preventing windage yaw and flashover of the power transmission line according to claim 2, characterized in that: the damping device (3) comprises a flexible damping spring.
4. The flexible damping device for preventing windage yaw and flashover of the power transmission line according to claim 2, characterized in that: the piston rod (4) comprises a composite material rod or a metal material rod.
5. The flexible damping device for preventing windage yaw and flashover of the power transmission line according to claim 2, characterized in that: the composite material fly claw assembly (6) comprises four composite material fly claws which are arranged in a matched mode.
6. The flexible damping device for preventing windage yaw and flashover of the power transmission line according to claim 1, characterized in that: the fastening device (10) comprises a composite spline bolt or a metal spline bolt.
7. The flexible damping device for preventing windage yaw and flashover of the power transmission line according to claim 1, characterized in that: an included angle is formed between the first support column type composite insulator string (1) and the second support column type composite insulator string (9), and the range of the included angle between the first support column type composite insulator string (1) and the second support column type composite insulator string (9) is determined through fixed mechanics finite element simulation.
8. The flexible damping device for preventing windage yaw and flashover of the power transmission line according to claim 7, characterized in that: and the included angle between the first support column type composite insulator string (1) and the second support column type composite insulator string (9) ranges from 30 degrees to 60 degrees.
9. The flexible damping device for preventing windage yaw and flashover of the power transmission line according to claim 1, characterized in that: the lengths of the support column type composite insulator string I (1) and the support column type composite insulator string II (9) are determined through the radius of a wind deflection clearance circle of a transmission line lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921594291.6U CN210468736U (en) | 2019-09-24 | 2019-09-24 | Power transmission line windage yaw flashover prevention flexible damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921594291.6U CN210468736U (en) | 2019-09-24 | 2019-09-24 | Power transmission line windage yaw flashover prevention flexible damping device |
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| CN210468736U true CN210468736U (en) | 2020-05-05 |
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| CN201921594291.6U Active CN210468736U (en) | 2019-09-24 | 2019-09-24 | Power transmission line windage yaw flashover prevention flexible damping device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518531A (en) * | 2019-09-24 | 2019-11-29 | 国网新疆电力有限公司伊犁供电公司 | A kind of inclined flashover flexibility damping unit of power transmission line wind and implementation method |
-
2019
- 2019-09-24 CN CN201921594291.6U patent/CN210468736U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518531A (en) * | 2019-09-24 | 2019-11-29 | 国网新疆电力有限公司伊犁供电公司 | A kind of inclined flashover flexibility damping unit of power transmission line wind and implementation method |
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