Safe overhead ground wire of power transmission line

Abstract

The utility model provides a safe power transmission line overhead ground wire which comprises a high-voltage electric tower, four supporting legs are arranged below the high-voltage electric tower, each supporting leg is fixedly installed on a supporting seat, the high-voltage electric tower comprises a pole tower, a lead electric pole is arranged above the pole tower, and the lead electric pole is fixedly installed on the supporting seat. The two ends and the lower portion of the middle of the wire electric pole are connected with wires, and suspension insulator strings are arranged between the wires and the wire electric pole. A ground wire electric pole is arranged at the top end of the wire electric pole, tower tops are arranged above the two ends of the ground wire electric pole, the lower portion of each tower top is connected with an overhead ground wire, and each overhead ground wire is grounded through a grounding device. Frost and snow removing devices are installed between the wire electric pole and the suspension insulator string and between the overhead ground wire and the bottom end of the tower top. According to the utility model, the problem of power transmission interruption of an electric power system caused by lightning stroke and frost and snow can be reduced, and normal operation of a line is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of power transmission lines, in particular to an overhead ground wire for a safe power transmission line. Background Art

[0002] Overhead transmission lines are widely distributed, located in the wilderness, crisscrossing and stretching for hundreds of kilometers. They are easily struck by lightning during the thunderstorm season, causing power outages. In frosty and snowy weather, frost will adhere to the lines. When the frost is too thick, it may break the conductors and cause power outages. Both of these are the main causes of power outages in power systems.

[0003] Since high-voltage, extra-high-voltage and ultra-high-voltage substations occupy a large area and require a large area to be protected from direct lightning strikes, it is difficult to install lightning rods. Therefore, overhead ground wire protection is needed. Overhead ground wire is an important component of the high-voltage transmission line structure; overhead ground wire is erected above the protected conductor. Installing overhead ground wire can reduce lightning accidents and improve the safety of line operation. When thunderclouds appear above the line and discharge to the ground, the lightning channel is likely to hit the overhead ground wire first, causing the lightning current to enter the earth to protect the normal power transmission of the conductor; at the same time, the overhead ground wire also has an electromagnetic shielding effect. When thunderclouds near the line discharge to the ground, it can reduce the lightning induced overvoltage caused on the conductor and reduce the chance of lightning directly striking the conductor.

[0004] A vibrating defrost and snow device is installed at the location where the conductor is connected to the high-voltage tower. When the frost and snow layer on the conductor is thin, the vibration of the defrost and snow device can effectively remove the shallow frost and snow layer on the conductor, thereby preventing the accumulation of frost and snow from breaking the conductor. Summary of the invention

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a safe overhead ground wire for power transmission lines.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A safe overhead ground wire for power transmission lines, comprising a high-voltage tower, wherein four supporting legs are arranged below the high-voltage tower, each of which is fixedly mounted on a supporting seat, and the high-voltage tower comprises a pole tower, wherein a conductor pole is arranged above the pole tower, conductors are connected below both ends of the conductor pole, conductors are also connected below the middle of the conductor pole, and a suspension insulator string is arranged between the conductor and the conductor pole; a ground wire pole is arranged at the top of the conductor pole, tower tops are arranged above both ends of the ground wire pole, and each An overhead ground wire is connected to the bottom of the tower top, and each of the overhead ground wires is grounded through a grounding device, and the grounding device is installed on a support seat; a defrost and snow device is installed between the conductor pole and the suspension insulator string, and a defrost and snow device is also installed between the overhead ground wire and the bottom end of the tower top, and the defrost and snow device includes a vibration box, and the vibration box is provided with a cavity, and circular holes for the conductor to pass through are provided in the middle of the upper and lower sides of the cavity, and the inner circle of the circular hole is provided with an insulating sleeve, and a vibration component for defrosting and snow is provided in the cavity.

[0008] Preferably, the support foot and the pole tower, the pole tower and the conductor pole, and the conductor pole and the ground wire pole are all connected by support rods and fixed by diagonal rods. The stability of the high-voltage tower can be ensured by fixing with support rods and diagonal rods.

[0009] Preferably, the conductor below the middle of the conductor pole is located in the direction of the symmetric center line of the conductors below the two ends of the conductor pole.

[0010] Preferably, two overhead ground wires are arranged between every two of the high-voltage power towers. When lightning strikes the top of the tower, the double overhead ground wires can shunt the lightning current.

[0011] Preferably, there are protection angles α between the two overhead ground wires and the conductors on both sides respectively, and the existence of the protection angles α can reliably protect the circuit.

[0012] Preferably, the material of the overhead ground wire is generally a conductive metal line with high mechanical properties, high conductivity and good corrosion resistance, such as galvanized steel stranded wire, aluminum-clad steel stranded wire and optical fiber composite overhead ground wire.

[0013] Preferably, the vibration component includes a vibrating member, which is arranged inside the cavity of the vibration box, the bottom end of the vibrating member conflicts with the bottom of the cavity, the top end of the vibrating member conflicts with the bottom end of the locking sleeve, the vibrating member and the locking sleeve are both arranged coaxially with the circular hole of the vibration box, and the vibrating member and the locking sleeve are both sleeved on the wire inside the cavity, and can drive the wire to move synchronously.

[0014] Preferably, the vibrating member comprises a wire sleeve with a hole and a vibrating plate fixedly connected to the middle of the wire sleeve, the hole diameter of the wire sleeve is the same as the hole diameter of the circular holes on the upper and lower sides of the vibration box, and a cylindrical hole with the same hole diameter as the wire sleeve is provided at the axis center of the positioning sleeve.

[0015] Preferably, a first bearing seat is provided on one side of the cavity, a vibration motor is fixedly installed on the side of the cavity opposite to the first bearing seat, the output end of the vibration motor is fixedly connected to the first end of the motor shaft, the second end of the motor shaft is fixedly installed on the first bearing seat through a bearing, a second bearing seat is provided at the bottom of the cavity close to the first bearing seat, the motor shaft is fixedly installed on the second bearing seat through a bearing, a rotating part is fixedly installed on the motor shaft, the motor shaft and the rotating part are connected by a key, the rotating part is located between the first bearing seat and the second bearing seat, the rotating part includes an axial hole with the same diameter as the motor shaft and a rotating blade, the end of the rotating blade can interfere with the vibration plate, and there are four rotating blades.

[0016] Preferably, the rotating member is made of metal, and the vibrating member and the locking sleeve are both made of soft elastic insulating material, which can effectively isolate the current of the wire and ensure the reliable and stable operation of the defrosting and snow defrosting device.

[0017] The beneficial effect of the utility model is that, by arranging the tower top and the overhead ground wire, the chance of lightning directly striking the conductor within the protection angle α of the overhead ground wire is reduced, and the amplitude of lightning overvoltage borne by the line insulation is reduced. At the same time, by arranging double tower tops and double overhead ground wires, when lightning directly strikes the tower top, the double overhead ground wires can shunt the lightning current, reduce the lightning current flowing into the conductor pole, and reduce its potential; by arranging the defrosting and snow device, the vibration of the vibrating components inside the vibration box drives the conductor to vibrate slightly, thereby removing the frost and snow layer on the conductor, avoiding the breakage of the conductor caused by the accumulation of frost and snow. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0019] Figure 2 It is a front view of an embodiment of the utility model;

[0020] Figure 3 A schematic diagram of a protection angle of an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of a snow and frost defrosting device according to an embodiment of the utility model;

[0022] Figure 5 A top view of the internal structure of a snow and frost defrosting device according to an embodiment of the utility model;

[0023] Figure 6 This is a schematic structural diagram of a rotating member according to an embodiment of the utility model;

[0024] Figure 7 This is a schematic structural diagram of a vibrating member according to an embodiment of the utility model;

[0025] 1-support base; 2-pole tower; 3-conductor pole; 4-ground wire pole; 5-conductor; 6-suspension insulator string; 7-overhead ground wire; 8-defrosting device; 81-vibration box; 82-first bearing seat; 83-second bearing seat; 84-vibration motor; 85-motor shaft; 86-rotating part; 861-shaft hole; 862-rotating blade; 87-vibrating part; 871-conductor sleeve; 872-vibrating plate; 88-positioning sleeve. DETAILED DESCRIPTION

[0026] In order to provide a further understanding of the purpose, structure, features and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0027] A safe overhead ground wire for a power transmission line comprises a high-voltage tower. Four supporting feet are arranged at the bottom of the high-voltage tower. Each supporting foot is fixedly mounted on a supporting seat 1. The high-voltage tower comprises a pole tower 2. A conductor pole 3 is arranged above the pole tower 2. A ground wire pole 4 is arranged at the top of the conductor pole 3. The supporting feet and the pole tower 2, the pole tower 2 and the conductor pole 3, and the conductor pole 3 and the ground wire pole 4 are all connected by supporting rods and fixed by diagonal rods. The stability of the high-voltage tower can be ensured by fixing with the supporting rods and the diagonal rods.

[0028] Conductors 5 are connected to the bottom of both ends of the conductor pole 3, and a conductor 5 is also connected to the bottom of the middle of the conductor pole 3. The conductor 5 below the middle of the conductor pole 3 is located in the symmetrical center line direction of the conductor 5 below the two ends of the conductor pole 3, and a suspension insulator string 6 is arranged between the conductor 5 and the conductor pole 3.

[0029] There are tower tops above both ends of the ground wire pole 4, and an overhead ground wire 7 is connected to the bottom of each tower top. Each overhead ground wire 7 is grounded through a grounding device, and the grounding device is installed on the support base 1; the connection between the overhead ground wire 7 and the grounding device can ensure that the high-voltage tower can reliably conduct the lightning current into the earth after being struck by lightning, thereby reducing the potential of the tower top 4 and improving the lightning resistance level.

[0030] Two overhead ground wires 7 are arranged between every two high-voltage towers. There are protection angles α between the two overhead ground wires 7 and the conductors 5 on both sides. The protection angle α is the protection range of the overhead ground wire to the conductor. The existence of the protection angle α can reliably protect the circuit.

[0031] The material of the overhead ground wire 7 is generally a conductive metal line with high mechanical properties, high conductivity and good corrosion resistance, such as galvanized steel stranded wire, aluminum-clad steel stranded wire and optical fiber composite overhead ground wire.

[0032] When the thundercloud discharges close to the ground, due to the setting of the overhead ground wire 7, the electric field strength at the top of the overhead ground wire 7 changes, guiding the lightning to discharge to the top of the tower, and then introducing the lightning current into the earth through the overhead ground wire 7 and the power connection device, thereby protecting the conductor 5 from lightning strikes.

[0033] A defrosting and snowing device 8 is installed between the conductor pole 3 and the suspension insulator string 6, and a defrosting and snowing device 8 is also installed between the overhead ground wire 7 and the bottom end of the tower top. The defrosting and snowing device 8 includes a vibration box 81, and the vibration box 81 is provided with a cavity. A circular hole for the conductor to pass through is provided in the middle of the upper and lower sides of the cavity. A vibration component for defrosting and snowing is provided in the cavity. The vibration component includes a vibration member 87, and the vibration member 87 is arranged inside the cavity of the vibration box 81. The bottom end of the vibration member 87 conflicts with the bottom of the cavity, and the top end of the vibration member 87 conflicts with the bottom end of the locking sleeve 88. The vibration member 87 and the locking sleeve 88 are both arranged coaxially with the circular hole of the vibration box 81, and the vibration member 87 and the locking sleeve 88 are arranged coaxially with the circular hole of the vibration box 81. The positioning sleeves 88 are all sleeved on the conductor 5 or the overhead ground wire 7 inside the cavity, and can drive the conductor 5 or the overhead ground wire 7 to move synchronously; the vibrating member 87 includes a conductor sleeve 871 with a hole and a vibrating plate 872 fixedly connected to the middle of the conductor sleeve 871, the aperture of the conductor sleeve 871 is the same as the aperture of the circular holes on the upper and lower sides of the vibration box 81, and the axis of the positioning sleeve 88 is provided with a cylindrical hole with the same aperture as the conductor sleeve 871; the inner circle of the circular hole is provided with an insulating sleeve, and the vibrating member 87 and the positioning sleeve 88 are both made of soft elastic insulating material, the insulating sleeve of the inner circle of the circular hole, the vibrating member 87 and the positioning sleeve 88 can effectively isolate the current, thereby ensuring the reliable and stable operation of the defrosting and snow defrosting device 8.

[0034] A first bearing seat 82 is provided on one side of the cavity, and a vibration motor 84 is fixedly installed on the side of the cavity opposite to the first bearing seat 82. The output end of the vibration motor 84 is fixedly connected to the first end of the motor shaft 85, and the second end of the motor shaft 85 is fixedly installed on the first bearing seat 82 through a bearing. A second bearing seat 83 is provided at the bottom of the cavity near the first bearing seat 82, and the motor shaft 85 is fixedly installed on the second bearing seat 83 through a bearing. A rotating member 86 is fixedly installed on the motor shaft 85, and the motor shaft 85 and the rotating member 86 are connected by a key. The rotating member 86 is located between the first bearing seat 82 and the second Between the bearing seats 83, the rotating member 86 includes an axial hole 861 with the same diameter as the motor shaft 85 and a rotating blade 862. The end of the rotating blade 862 can interfere with the vibration plate 872, and the rotating blade 862 is provided with four; the rotating member 86 is made of metal; the rotating blade 862 hits the vibration plate 872 during operation. Since the vibration plate 872 is made of soft elastic material, when the rotating blade 862 hits the vibration plate 872, the vibration plate 872 is bent and resets after the rotating blade 862 passes by. Vibration is generated during the reset process, which drives the conductor 5 or the overhead ground wire 7 to vibrate and removes frost and snow covering it.

[0035] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any changes and modifications made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A safety transmission line overhead ground wire, installed on a high-voltage tower, with four support legs provided below the high-voltage tower, each of which is fixedly mounted on a support seat, characterized in that: The high-voltage power tower comprises a pole tower, a conductor pole is arranged above the pole tower, conductors are connected to the bottom of both ends of the conductor pole, a conductor is also connected to the bottom of the middle of the conductor pole, and a suspension insulator string is arranged between the conductor and the conductor pole; a ground wire pole is arranged at the top of the conductor pole, tower tops are arranged above both ends of the ground wire pole, an overhead ground wire is connected to the bottom of each tower top, each overhead ground wire is grounded through a grounding device, and the grounding device is installed on a support seat; a defrosting and snowing device is installed between the conductor pole and the suspension insulator string, a defrosting and snowing device is also installed between the overhead ground wire and the bottom of the tower top, and the defrosting and snowing device comprises a vibration box, the vibration box is provided with a cavity, a circular hole for the conductor to pass through is provided in the middle of the upper and lower sides of the cavity, an insulating sleeve is provided in the inner circle of the circular hole, and a vibration component for defrosting and snowing is provided in the cavity.

2. A safe overhead ground wire for power transmission lines according to claim 1, characterized in that: The support foot and the pole tower, the pole tower and the conductor pole, and the conductor pole and the ground wire pole are all connected by support rods and fixed by inclined rods.

3. A safe overhead ground wire for power transmission lines according to claim 1, characterized in that: The conductor under the middle of the conductor pole is located in the symmetrical center line direction of the conductors under the two ends of the conductor pole.

4. A safe overhead ground wire for power transmission lines according to claim 1, characterized in that: Two overhead ground wires are arranged between every two of the high-voltage towers.

5. The safety overhead ground wire for power transmission lines according to claim 1, characterized in that: There are protection angles α between the two overhead ground wires and the conductors on both sides.

6. A safe overhead ground wire for power transmission lines according to claim 1, characterized in that: The material of the overhead ground wire is generally a conductive metal line with high mechanical properties, high conductivity and good corrosion resistance.

7. A safe overhead ground wire for power transmission lines according to claim 1, characterized in that: The vibration component includes a vibrating member, which is arranged inside the cavity of the vibration box, the bottom end of the vibrating member conflicts with the bottom of the cavity, the top end of the vibrating member conflicts with the bottom end of the locking sleeve, the vibrating member and the locking sleeve are both arranged coaxially with the circular hole of the vibration box, and the vibrating member and the locking sleeve are both sleeved on the wire inside the cavity.

8. A safe overhead ground wire for power transmission lines according to claim 7, characterized in that: The vibrating member comprises a wire sleeve with a hole and a vibrating plate fixedly connected to the middle of the wire sleeve. The hole diameter of the wire sleeve is the same as the hole diameter of the circular holes on the upper and lower sides of the vibration box. A cylindrical hole with the same hole diameter as the wire sleeve is provided at the axis center of the positioning sleeve.

9. A safe overhead ground wire for power transmission lines according to claim 8, characterized in that: A first bearing seat is provided on one side of the cavity, and a vibration motor is fixedly installed on the side of the cavity opposite to the first bearing seat. The output end of the vibration motor is fixedly connected to the first end of the motor shaft, and the second end of the motor shaft is fixedly installed on the first bearing seat through a bearing. A second bearing seat is provided at a position near the bottom of the cavity near the first bearing seat, and the motor shaft is fixedly installed on the second bearing seat through a bearing. A rotating part is fixedly installed on the motor shaft, and the motor shaft and the rotating part are connected by a key. The rotating part is located between the first bearing seat and the second bearing seat, and the rotating part includes an axial hole with the same diameter as the motor shaft and a rotating blade, the end of the rotating blade can interfere with the vibration plate, and four rotating blades are provided.

10. A safe overhead ground wire for power transmission lines according to claim 9, characterized in that: The rotating member is made of metal, and the vibrating member and the locking sleeve are both made of soft elastic insulating material.

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