CN202996444U - 750 kV power transmission line composite cross-arm structure configured with grading ring and shielding ring - Google Patents
750 kV power transmission line composite cross-arm structure configured with grading ring and shielding ring Download PDFInfo
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- CN202996444U CN202996444U CN 201220706885 CN201220706885U CN202996444U CN 202996444 U CN202996444 U CN 202996444U CN 201220706885 CN201220706885 CN 201220706885 CN 201220706885 U CN201220706885 U CN 201220706885U CN 202996444 U CN202996444 U CN 202996444U
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Abstract
The utility model relates to a 750 kV power transmission line composite cross-arm structure configured with a grading ring and a shielding ring, comprising a composite cross-arm with a tapered shape; the composite cross-arm is divided into upper and lower phases connected to a tower body of a steel structure, including one upper phase composite cross-arm and two lower phase composite cross-arms symmetrically arranged on two sides of the tower body; each composite cross-arm is composed of an insulator and a connection fitting. An upper part of the composite cross-arm is two strings of cable-stayed insulators arranged in a V shape, wherein one side is intersected with an end portion fitting and the other side is in connection with the tower body; a lower part of the composite cross-arm is two strings of horizontally placed pillar insulators, wherein one side of the pillar insulators is intersected with the end portion fitting and the other side is in connection with the tower body; an outboard shielding ring of the end portion fitting is in connection with the composite cross-arm end portion fitting through a support. The structure can realize uniformization of distribution voltage and electric field distribution of the composite cross-arm, inhibits corona discharge of the fitting and electric corrosion of an insulator sheath and raises operation reliability.
Description
Technical field
The utility model belongs to ultrahigh-voltage alternating-current transmission line external insulation technical field, relates to a kind of compound cross-arm structure, especially a kind of compound cross-arm structure of 750kV transmission line that disposes grading ring, shading ring.
Background technology
Steel is in great demand in transmission line construction, China 750kV transmission line all adopts the shaft tower of all-steel structure at present, this has consumed a large amount of mineral resources and biological environment has been caused certain pollution and destruction, steel exist quality weight, easy-to-rust or the defectives such as cracking, poor performance at low temperatures, also have the problems such as construction transportation and operation maintenance difficulty under particular surroundings.Composite material is good because of its hydrophobicity, anti-pollution flashover, the advantage such as lightweight are widely applied in transmission line.Along with the development of composite technology and manufacturing process thereof, composite material is applied to transmission tower becomes possibility.
The compound cross-arm of 750kV transmission line compares with original all-steel shaft tower that to have performance safer, the advantage such as cost is more economical, and installation and transportation are more convenient, and resource is more saved, and environment is more friendly.Yet the compound cross-arm complex structure of 750kV transmission line is subjected to the impact of tower body, transmission pressure distributed capacitance, all pressure, an equal outstanding problem.
Near the insulator side of wire was full skirt will bear voltage and electric field strength than high 3 ~ 5 times of insulator middle part full skirt, and in insulator sheath and gold utensil junction, Electric Field Distribution is relatively concentrated simultaneously.If the grading ring mis-arrange will produce corona discharge in these zones and galvanic corrosion is damaged.Special in the junction of sheath and gold utensil, because hardware end and silicone rubber jacket form weak interface, and should place's electric field very concentrated, under the filthy conditions such as misty rain, travel fatigue, be vulnerable to the galvanic corrosion damage, acceleration insulator sheath is deteriorated.Therefore, reasonably configuration grading ring, shading ring can effectively improve the Potential distribution of compound cross-arm, reduce the electric field strength of uniform ring, shading ring, connection gold utensil and insulator jacket surface, be significant to improving the 750kV compound cross-arm safe operation of transmission line reliability.
At present, because the compound cross-arm of 750kV transmission line also is in the research and construction stage, so the configuration structure of its grading ring, shading ring there is not yet open report.
The utility model content
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, a kind of compound cross-arm structure of 750kV transmission line that disposes grading ring, shading ring is provided, this structure can realize spread voltage and the Electric Field Distribution homogenizing of compound cross-arm, suppress the corona discharge of gold utensil and the galvanic corrosion of insulator sheath and damage, improve the operational reliability of the compound cross-arm of 750kV transmission line.
The purpose of this utility model solves by the following technical programs:
This compound cross-arm structure of 750kV transmission line that disposes grading ring, shading ring, comprise and be arranged on the compound cross-arm of doing on the font tower body, it is characterized in that, described compound cross-arm is tapered structure, divide upper and lower two-phase to be connected on the tower body of steel construction, wherein go up mutually compound cross-arm and only have one, be arranged on a side of tower body; Lower mutually compound cross-arm has two, be symmetricly set on the both sides of tower body, under the Length Ratio of upper mutually compound cross-arm, mutually compound cross-arm is short, each compound cross-arm by insulator be connected gold utensil and consist of, the top of compound cross-arm is that two string slant settings are the oblique pull insulator that V-shape is arranged, one side of oblique pull insulator intersects at the end metal fitting of compound cross-arm, opposite side is connected with tower body, the bottom of compound cross-arm is that two string horizontal positioned are the post insulator that V-shape is arranged, one side of post insulator intersects at the end metal fitting of compound cross-arm, and opposite side is connected with tower body; The outside configuration racetrack shading ring of described compound cross arm end gold utensil is connected on compound cross arm end gold utensil with support, with the transmission pressure equipotential.
Further, above-mentioned post insulator has spacer flanger, and post insulator is divided into two sections by spacer flanger, is connected by trombone slide between spacer flanger and tower body, is connected by connecting auxiliary material between spacer flanger, and this moment, the bottom of compound cross-arm was the font structure of falling A.
Grading ring of transmission line wire side configuration of above-mentioned compound cross-arm lower posts insulator is fixed on support on the side of wire was flange of post insulator, with the transmission pressure equipotential; Grading ring of tower body side configuration of post insulator, be fixed on support on the tower body side flange of post insulator, with the tower body equipotential, upper mutually compound cross-arm bottom first paragraph post insulator and grading ring of the other configuration in spacer flanger connection, be fixed on spacer flanger with support, with the spacer flanger equipotential, on post insulator, the grading ring size of position is identical.
Above-mentioned grading ring is designed to two and half annular types, and the installation site is all at the end face of flange of post insulator and apart from end face of flange between nearest first full skirt.
Another program of the present utility model is, post insulator does not have spacer flanger, and the bottom of described compound cross-arm is the V-shape structure; Grading ring of transmission line wire side configuration at compound cross-arm lower posts insulator is fixed on support on the side of wire was flange of post insulator, and with the transmission pressure equipotential, this grading ring is designed to two and half annular types.
little grading ring of transmission line wire side configuration of above-mentioned compound cross-arm top oblique pull insulator, be fixed on compound cross arm end gold utensil and rod gold utensil that the oblique pull insulator is connected with support, with the transmission pressure equipotential, little grading ring of tower body side configuration of oblique pull insulator, be fixed on tower body and rod gold utensil that the oblique pull insulator is connected with support, with the tower body equipotential, on the oblique pull insulator, the little grading ring size of position is identical, this little grading ring is less than the grading ring of post insulator, its installation site is all in the sheath of oblique pull insulator and rod gold utensil junction.
The utlity model has following beneficial effect:
The compound cross-arm grading ring of 750kV transmission line of the present utility model, shading ring are rational in infrastructure; spread voltage and the Electric Field Distribution homogenizing of compound cross-arm have been realized; suppressing the corona discharge of gold utensil and the galvanic corrosion of insulator sheath damages; protect the hermetically-sealed construction of insulator end, significantly improved the compound cross-arm reliability of operation of 750kV transmission line.
Description of drawings
Fig. 1 is the overall schematic of the compound cross-arm lower posts of 750kV transmission line of the present invention insulator when spacer flanger is arranged.
Fig. 2 be in Fig. 1 on mutually compound cross-arm grading ring, shading ring configuration structure.
Fig. 3 be in Fig. 1 under mutually compound cross-arm grading ring, shading ring configuration structure.
Fig. 4 is the overall schematic when in the present invention, the compound cross-arm lower posts of 750kV transmission line insulator is without spacer flanger.
Fig. 5 is upper phase, lower mutually compound cross-arm grading ring, shading ring configuration structure in Fig. 4.
Fig. 6 is Fig. 1 to Fig. 5 B-C post insulator equalizing ring opening schematic diagram.
In Fig. 1 to Fig. 5,1 is tower body; 2 is compound cross-arm post insulator; 3 is the oblique pull insulator; 4 is compound cross-arm trombone slide; 5 is that compound cross-arm connects auxiliary material; 6 is compound cross arm end gold utensil; 7 is the post insulator spacer flanger; 8 are multiple fission conductor connection gold utensil; 9 is transmission pressure; 10 are tower body side connection gold utensil; 11 is the racetrack shading ring; 12 is grading ring; 13 is little grading ring.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
As Fig. 1, shown in Figure 4, the compound cross-arm of 750kV transmission line, a minute upper and lower two-phase is connected on the tower body 1 of steel construction, wherein goes up mutually compound cross-arm and only has one, is arranged on a side of tower body; Lower mutually compound cross-arm has two, be symmetricly set on the both sides of tower body, under the Length Ratio of upper mutually compound cross-arm, mutually compound cross-arm is short, the top of compound cross-arm is that two string slant settings are the oblique pull insulator 3 that V-shape is arranged, one side of oblique pull insulator 3 intersects at compound cross arm end gold utensil 6, and opposite side is connected with tower body 1.The bottom of compound cross-arm is that two string horizontal positioned are the post insulator 2 that V-shape is arranged, one side of post insulator 2 intersects at compound cross arm end gold utensil 6, opposite side is connected with tower body 1, when post insulator 2 has spacer flanger 7, post insulator 2 is divided into two sections, be connected by trombone slide 4 between spacer flanger 7 and tower body 1, be connected by connecting auxiliary material 5 between spacer flanger 7, the bottom of compound cross-arm is the font structure of falling A; During without spacer flanger 7, the bottom of compound cross-arm is the V-shape structure when post insulator 2.
Embodiment 1:
As shown in Figure 2 and Figure 3, when post insulator 2 had spacer flanger 7, the side of wire was configuration grading ring 12 at compound cross-arm lower posts insulator was fixed to support on the side of wire was flange of post insulator 2, with transmission pressure 9 equipotentials; Tower body side configuration grading ring 12 at compound cross-arm lower posts insulator 2 is fixed to support on the tower body side flange of post insulator 2, with tower body 1 equipotential; Grading ring 12 of first paragraph post insulator 2 and the other configuration in spacer flanger 7 connections in upper mutually compound cross-arm bottom, be fixed to support on the spacer flanger 7 of post insulator 2, with spacer flanger 7 equipotentials, in order to shield the high field intensity of post insulator sheath and flange connections, for the ease of installing, grading ring 12 is designed to two and half annular types (as shown in Figure 6).
At the little grading ring 13 of side of wire was configuration of compound cross-arm top oblique pull insulator 3, be fixed on compound cross arm end gold utensil 6 and rod gold utensil that oblique pull insulator 3 is connected, with transmission pressure 9 equipotentials with support; At the little grading ring 13 of tower body side configuration of compound cross-arm top oblique pull insulator 3, be fixed on tower body 1 and rod gold utensil that oblique pull insulator 3 is connected with support, with tower body 1 equipotential, to shield the high field intensity of oblique pull insulator sheath and rod gold utensil junction.
At the outside of compound cross arm end gold utensil 6 configuration racetrack shading ring 11, be connected on compound cross arm end gold utensil 6 with support, with transmission pressure 9 equipotentials, the high field intensity of compound cross arm end gold utensil 6, post insulator side of wire was grading ring 12 and the little grading ring 13 of oblique pull insulator side of wire was can be shielded on the one hand, the Potential distribution of post insulator 2 and oblique pull insulator 3 can be improved on the other hand.
Embodiment 2:
As shown in Figure 5, when post insulator 2 during without spacer flanger 7, side of wire was configuration grading ring 12 at compound cross-arm lower posts insulator 2, be fixed to support on the side of wire was flange of post insulator 2, with transmission pressure 9 equipotentials, in order to shield the high field intensity of post insulator sheath and flange connections, for the ease of installing, grading ring 12 is designed to two and half annular types.
At the little grading ring 13 of side of wire was configuration of compound cross-arm top oblique pull insulator 3, be fixed on compound cross arm end gold utensil 6 and rod gold utensil that oblique pull insulator 3 is connected, with transmission pressure 9 equipotentials with support; At the little grading ring 13 of tower body side configuration of compound cross-arm top oblique pull insulator 3, be fixed on tower body 1 and rod gold utensil that oblique pull insulator 3 is connected with support, with tower body 1 equipotential, to shield the high field intensity of oblique pull insulator sheath and rod gold utensil junction.
At the outside of compound cross arm end gold utensil 6 configuration racetrack shading ring 11, be connected on compound cross arm end gold utensil 6 with support, with transmission pressure 9 equipotentials, the high field intensity of compound cross arm end gold utensil 6, post insulator side of wire was grading ring 12 and the little grading ring 13 of oblique pull insulator side of wire was can be shielded on the one hand, the Potential distribution of post insulator 2 and oblique pull insulator 3 can be improved on the other hand.
Claims (6)
1. compound cross-arm structure of 750kV transmission line that disposes grading ring, shading ring, comprise and be arranged on the compound cross-arm of doing on the font tower body, it is characterized in that, described compound cross-arm is tapered structure, divide upper and lower two-phase to be connected on the tower body of steel construction, wherein go up mutually compound cross-arm and only have one, be arranged on a side of tower body, lower mutually compound cross-arm has two, be symmetricly set on the both sides of tower body, under the Length Ratio of upper mutually compound cross-arm, mutually compound cross-arm is short, each compound cross-arm by insulator be connected gold utensil and consist of, the top of compound cross-arm is that two string slant settings are the oblique pull insulator (3) that V-shape is arranged, one side of oblique pull insulator (3) intersects at the end metal fitting (6) of compound cross-arm, opposite side is connected with tower body (1), the bottom of compound cross-arm is that two string horizontal positioned are the post insulator (2) that V-shape is arranged, one side of post insulator (2) intersects at the end metal fitting (6) of compound cross-arm, opposite side is connected with tower body (1), the outside configuration racetrack shading ring (11) of described compound cross arm end gold utensil (6) is connected on compound cross arm end gold utensil (6) with support, with the transmission pressure equipotential.
2. the compound cross-arm structure of 750kV transmission line that disposes grading ring, shading ring according to claim 1, it is characterized in that, described post insulator (2) has spacer flanger (7), post insulator (2) is divided into two sections by spacer flanger (7), be connected by trombone slide (4) between spacer flanger (7) and tower body (1), be connected by connecting auxiliary material (5) between spacer flanger (7), this moment, the bottom of compound cross-arm was the font structure of falling A.
3. the compound cross-arm structure of 750kV transmission line that disposes grading ring, shading ring according to claim 2, it is characterized in that, a transmission line wire side configuration grading ring (12) of described compound cross-arm lower posts insulator (2), be fixed on support on the side of wire was flange of post insulator (2), with the transmission pressure equipotential; A tower body side configuration grading ring (12) of post insulator (2), be fixed on support on the tower body side flange of post insulator (2), with the tower body equipotential, upper mutually compound cross-arm bottom first paragraph post insulator and the other configuration in a spacer flanger connection grading ring (12), be fixed on spacer flanger with support, with the spacer flanger equipotential, on post insulator, the grading ring of position (12) size is identical.
4. the compound cross-arm structure of 750kV transmission line that disposes grading ring, shading ring according to claim 3, it is characterized in that, described grading ring (12) is designed to two and half annular types, and the installation site is all at the end face of flange of post insulator (2) and apart from end face of flange between nearest first full skirt.
5. the compound cross-arm structure of 750kV transmission line that disposes grading ring, shading ring according to claim 1, is characterized in that, the bottom of described compound cross-arm is the V-shape structure; A transmission line wire side configuration grading ring (12) at compound cross-arm lower posts insulator (2) is fixed on support on the side of wire was flange of post insulator (2), and with the transmission pressure equipotential, this grading ring (12) is designed to two and half annular types.
6. the grading ring that disposes according to claim 1, the compound cross-arm structure of the 750kV transmission line of shading ring, it is characterized in that, a transmission line wire side configuration little grading ring (13) of described compound cross-arm top oblique pull insulator (3), be fixed on compound cross arm end gold utensil (6) and rod gold utensil that oblique pull insulator (3) is connected with support, with transmission pressure (9) equipotential, a tower body side configuration little grading ring (13) of oblique pull insulator (3), be fixed on tower body (1) and rod gold utensil that oblique pull insulator (3) is connected with support, with tower body (1) equipotential, little grading ring (13) size of the upper position of oblique pull insulator (3) is identical, this little grading ring (13) is less than the grading ring (12) of post insulator (2), its installation site is all in the sheath of oblique pull insulator (3) and rod gold utensil junction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220706885 CN202996444U (en) | 2012-12-19 | 2012-12-19 | 750 kV power transmission line composite cross-arm structure configured with grading ring and shielding ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220706885 CN202996444U (en) | 2012-12-19 | 2012-12-19 | 750 kV power transmission line composite cross-arm structure configured with grading ring and shielding ring |
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| Publication Number | Publication Date |
|---|---|
| CN202996444U true CN202996444U (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220706885 Expired - Fee Related CN202996444U (en) | 2012-12-19 | 2012-12-19 | 750 kV power transmission line composite cross-arm structure configured with grading ring and shielding ring |
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| CN (1) | CN202996444U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836935A (en) * | 2017-03-24 | 2017-06-13 | 国家电网公司 | A kind of upper font E glass-epoxies cross-arm tower |
| CN107419952A (en) * | 2017-09-06 | 2017-12-01 | 武汉南瑞电力工程技术装备有限公司 | A kind of extra-high voltage composite insulation cross arm |
| CN112134242A (en) * | 2020-08-21 | 2020-12-25 | 中国电力科学研究院有限公司 | Composite insulating cross arm for power transmission line and preparation method |
-
2012
- 2012-12-19 CN CN 201220706885 patent/CN202996444U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836935A (en) * | 2017-03-24 | 2017-06-13 | 国家电网公司 | A kind of upper font E glass-epoxies cross-arm tower |
| CN107419952A (en) * | 2017-09-06 | 2017-12-01 | 武汉南瑞电力工程技术装备有限公司 | A kind of extra-high voltage composite insulation cross arm |
| CN112134242A (en) * | 2020-08-21 | 2020-12-25 | 中国电力科学研究院有限公司 | Composite insulating cross arm for power transmission line and preparation method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20131219 |