CN214253985U - 750kV line cross yoke plate windage yaw prevention anchor type insulator string that dangles - Google Patents
750kV line cross yoke plate windage yaw prevention anchor type insulator string that dangles Download PDFInfo
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- CN214253985U CN214253985U CN202120300401.4U CN202120300401U CN214253985U CN 214253985 U CN214253985 U CN 214253985U CN 202120300401 U CN202120300401 U CN 202120300401U CN 214253985 U CN214253985 U CN 214253985U
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Abstract
The utility model relates to the technical field of suspension strings for power transmission lines, and discloses a 750kV line cross suspension yoke plate windage yaw prevention anchor type insulator string, which comprises an I-shaped insulator string for bearing loads in the vertical direction and a V-shaped insulator string for bearing loads in the horizontal direction; the I-shaped insulator string comprises a tower-connected hardware trunnion hanging plate, a U-shaped hanging ring, a ball head hanging ring, a composite insulator string, a grading ring, a socket head hanging plate, a cross-shaped connecting plate, a suspension clamp and a heavy hammer sheet which are connected in sequence; the V-shaped insulator string comprises a tower-connected hardware trunnion hanging plate, two U-shaped hanging rings, a DB adjusting plate, a PT adjusting plate, the U-shaped hanging rings, a composite insulator string and a grading ring which are sequentially connected; the I-shaped insulator string and the V-shaped insulator string are connected together through the cross-shaped connecting plate to form an integral hardware fitting. The insulator string can improve the wind resistance, has stable performance, can shorten the length of the hardware fitting, effectively reduces the operation risk of the power transmission line, and saves the construction cost of the power transmission line.
Description
Technical Field
The invention relates to the technical field of suspension strings for power transmission lines, in particular to a 750kV line cross-shaped suspension yoke plate windage yaw prevention anchor type insulator string.
Background
The suspension string for the transmission line is an important hardware in the transmission line, which bears the weight of the transmission conductor in the vertical direction, the weight of the ice coating and the wind force in the horizontal direction. The overhang string is often designed in an "I" shape, which can cause an electrical gap distance to be insufficient and a tripping event to occur if the instantaneous wind speed exceeds the maximum design wind speed. For a high-voltage transmission line with voltage of more than 750kV, the high-voltage transmission line has high voltage level, and the climate change of a passing area is often large, and the high-voltage transmission line can even pass through an abnormal strong wind area.
SUMMERY OF THE UTILITY MODEL
The invention of the utility model aims to: aiming at the existing problems, the 750kV line cross-shaped suspension yoke plate windage yaw prevention anchor type insulator string is provided, the wind resistance of a 750kV high-voltage transmission line passing through an abnormal strong wind zone is enhanced, and the safety, reliability and economy of the transmission line are effectively improved.
The utility model discloses a technical scheme be like:
the utility model provides a 750kV circuit cross yoke plate that dangles prevents windage yaw anchor type insulator chain, includes I type insulator chain and the V type insulator chain of the left and right sides, I type insulator chain is used for bearing the load of vertical direction, and the V type insulator chain of the left and right sides is used for bearing the load of horizontal direction, I type insulator chain and V type insulator chain link together through cross yoke plate, constitute an integral gold utensil.
The I-shaped insulator string comprises a tower-connecting hardware trunnion hanging plate, a U-shaped hanging ring, a ball head hanging ring, a composite insulator string, a grading ring, a socket head hanging plate, a cross-shaped connecting plate, a suspension clamp and a heavy hammer sheet which are connected in sequence;
the V-shaped insulator string comprises a tower-connected hardware trunnion hanging plate, a DB adjusting plate, a PT adjusting plate, a U-shaped hanging ring, a composite insulator string and a grading ring which are sequentially connected; the DB adjusting plate is connected with a tower-connected hardware trunnion hanging plate through two U-shaped hanging rings which are connected together, and the V-shaped insulator string is connected to a cross-shaped connecting plate of the I-shaped insulator string through the U-shaped hanging rings. The DB adjusting plate and the PT adjusting plate are added, so that the V-shaped insulator strings have a length adjusting function, and the V-shaped insulator strings on the left side and the right side are in a natural suspension anti-loosening state in the absence of wind; when wind exists, the limb of the V-shaped insulator string on the left side and the right side which is windingly receives generates pulling force, so that the insulator is prevented from windage yaw.
Furthermore, the hanging holes of the cross-shaped yoke plate are positioned inside the split circle of the lead, the electric field distribution of the first insulator is improved by utilizing the self-shielding function of the six sub-leads, and the length of part of hardware fittings of the I-shaped insulator string can be shortened by 0.42 meter.
Further, the distance between the central axes of the suspension clamps is 400 mm.
Furthermore, a pre-twisted line protecting strip is arranged in a wire clamp hole of the suspension clamp.
Furthermore, the I-shaped insulator string is a two-connection suspension type insulator string, and the distance between the central axes of the two-connection suspension type insulator string is 550 mm.
Furthermore, the composite insulator strings on the V-shaped insulator strings are connected together in a ring-ring mode to form a ring-ring connection composite insulator string, so that the string falling caused by heavy wind is prevented.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that: for a high-voltage transmission line with voltage of more than 750kV, the high-voltage transmission line has very high voltage level, and the climate change of passing areas is often large, and even the high-voltage transmission line can pass through abnormal strong wind areas; the cross-shaped connecting plate can shorten the length of an I-shaped insulator string serving as a middle limb by 0.42 meter, and can effectively reduce the size of a tower head; the mode that the part I mainly bears vertical load and the part V mainly bears horizontal load is adopted, and the condition that the V string is released and falls off or is pressed too seriously (more than 20 degrees in the past engineering limit) is avoided; the wind resistance is stronger, the operation risk of the power transmission line is effectively reduced, meanwhile, the mass of an iron tower in the power transmission line is reduced, the foundation cost is reduced, and the economical efficiency of the engineering construction of the 750kV high-voltage power transmission line is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of an I-type insulator string.
Description of the drawings: 1-I part tower-connected hardware trunnion hanging plate, 2-U-shaped hanging ring, 3-bulb hanging ring, 4-composite insulator string, 5-equalizing ring, 6-bowl hanging plate, 7-cross-shaped suspension connecting plate, 8-suspension clamp, 9-pre-twisted wire protecting line, 10-hammer sheet, 11-V part tower-connected hardware trunnion hanging plate, 12-DB adjusting plate, 13-PT adjusting plate, 14-ring connection composite insulator string and 15-equalizing ring.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment provides a 750kV line cross-shaped suspension yoke plate windage yaw prevention anchor type insulator string, which comprises an I-shaped insulator string serving as a middle limb and a V-shaped insulator string serving as a left limb and a right limb as shown in figure 1.
As shown in fig. 2, the I-type insulator string includes a tower-linking hardware trunnion hanging plate, a U-shaped hanging ring, a ball head hanging ring, a composite insulator string, a grading ring, a socket hanging plate, a cross-shaped suspension connecting plate, a suspension clamp and a weight piece, which are connected in sequence.
The V-shaped insulator string comprises a tower-connecting hardware trunnion hanging plate, two U-shaped hanging rings, a DB adjusting plate, a PT adjusting plate, the U-shaped hanging rings, a composite insulator string and an equalizing ring which are sequentially connected.
The V-shaped insulator string is connected to the cross yoke plate of the I-shaped insulator string through the U-shaped hanging ring, so that the I-shaped insulator string and the V-shaped insulator string are connected, and an integral hardware fitting is formed. The I-shaped insulator string mainly bears vertical load, and the V-shaped insulator string mainly bears horizontal load.
The cross-shaped suspension yoke plate of the I-shaped insulator string is specially designed, the hanging hole is arranged in the wire splitting circle, the electric field distribution of the first insulator is improved by utilizing the self-shielding function of six sub-wires, and the length of a part of hardware fittings of the I-shaped insulator string serving as a middle limb can be shortened by 0.42 meter.
The DB adjusting plate and the PT adjusting plate in the V-shaped insulator string have a length adjusting function, so that the length of the V-shaped insulator string can be adjusted. When no wind exists, the V-shaped insulator strings on the left side and the right side are in a natural suspension anti-loosening state; when wind exists, the V-shaped insulator string is pulled by a wind limb to prevent the insulator from windage yaw.
Example 2
On the basis of embodiment 1, preferably, in the present embodiment, the distance between the central axes of the suspension clamps is 400 mm.
Example 3
On the basis of the embodiment 1 or 2, preferably, in the embodiment, a pre-twisted line protecting strip is arranged in the wire clamping hole of the suspension clamp.
Example 4
On the basis of embodiment 1 or 2 or 3, preferably, in the present embodiment, the I-type insulator string is a two-pair hanging insulator string, and the central axes of the two-pair hanging insulator string are spaced by 550 mm.
Example 5
On the basis of the embodiment 1 or 2 or 3 or 4, preferably, in this embodiment, the composite insulator strings on the V-shaped insulator string are connected together in a ring-ring manner to form a ring-ring connection composite insulator string, so as to prevent the string from being released by strong wind.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a 750kV circuit cross yoke plate windage yaw prevention anchor type insulator chain that dangles which characterized in that: the I-shaped insulator string and the V-shaped insulator string are connected together through the cross connecting plate to form an integral hardware fitting.
2. The 750kV line cross-shaped suspension yoke plate windage yaw prevention anchor type insulator string as claimed in claim 1, wherein: the I-type insulator string comprises a tower-connecting hardware trunnion hanging plate, a U-shaped hanging ring, a ball head hanging ring, a composite insulator string, a grading ring, a socket head hanging plate, a cross-shaped connecting plate, a suspension clamp and a weight piece which are sequentially connected.
3. The 750kV line cross-shaped suspension yoke plate windage yaw prevention anchor type insulator string as claimed in claim 1 or 2, wherein: the V-shaped insulator string comprises a tower-connecting hardware trunnion hanging plate, a PT adjusting plate, a U-shaped hanging ring, a composite insulator string and a grading ring which are sequentially connected.
4. The 750kV line cross-shaped suspension yoke plate windage yaw prevention anchor type insulator string as claimed in claim 1 or 2, wherein: the hanging hole of the cross-shaped yoke plate is positioned inside the conductor splitting circle.
5. The 750kV line cross-shaped suspension yoke plate windage yaw prevention anchor type insulator string as claimed in claim 2, wherein: the distance between the central axes of the suspension clamps is 400 mm.
6. The 750kV line cross-shaped suspension yoke plate windage yaw prevention anchor type insulator string as claimed in claim 2, wherein: and a pre-twisted wire protecting strip is arranged in a wire clamping hole of the suspension clamp.
7. The 750kV line cross-shaped suspension yoke plate windage yaw prevention anchor type insulator string as claimed in claim 2, wherein: the I-shaped insulator string is a two-connection suspension type insulator string, and the distance between the central axes of the two-connection suspension type insulator string is 550 mm.
8. The 750kV line cross-shaped suspension yoke plate windage yaw prevention anchor type insulator string as claimed in claim 3, wherein: the composite insulator strings on the V-shaped insulator strings are connected together in a ring-ring mode to form a ring-ring connection composite insulator string.
9. The 750kV line cross-shaped suspension yoke plate windage yaw prevention anchor type insulator string as claimed in claim 8, wherein: the V-shaped insulator string is characterized by further comprising a DB adjusting plate, one end of the DB adjusting plate is connected with a tower-connecting hardware fitting trunnion hanging plate through two U-shaped hanging rings which are connected together, and the other end of the DB adjusting plate is connected with a PT adjusting plate.
10. The 750kV line cross-shaped suspension yoke plate windage yaw prevention anchor type insulator string as claimed in claim 3, wherein: the V-shaped insulator string is connected to the cross-shaped yoke plate of the I-shaped insulator string through the U-shaped hanging ring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120300401.4U CN214253985U (en) | 2021-02-02 | 2021-02-02 | 750kV line cross yoke plate windage yaw prevention anchor type insulator string that dangles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120300401.4U CN214253985U (en) | 2021-02-02 | 2021-02-02 | 750kV line cross yoke plate windage yaw prevention anchor type insulator string that dangles |
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| CN214253985U true CN214253985U (en) | 2021-09-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113053595A (en) * | 2021-02-02 | 2021-06-29 | 中国电力工程顾问集团西南电力设计院有限公司 | 750kV line cross yoke plate windage yaw prevention anchor type insulator string that dangles |
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2021
- 2021-02-02 CN CN202120300401.4U patent/CN214253985U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113053595A (en) * | 2021-02-02 | 2021-06-29 | 中国电力工程顾问集团西南电力设计院有限公司 | 750kV line cross yoke plate windage yaw prevention anchor type insulator string that dangles |
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