CN202662402U

CN202662402U - 300 kN duplex long-stick strain porcelain insulator string for +/- 400 kV direct-current lines

Info

Publication number: CN202662402U
Application number: CN2012201521549U
Authority: CN
Inventors: 张小力; 周刚; 葛秦岭; 孙菊海; 王红宣; 张勇; 和勇; 张道维; 郭先弼
Original assignee: DC CONSTRUCTION BRANCH STATE GRID CORP OF CHINA; Shaanxi Electric Power Design Institute; Northwest Electric Power Design Institute of China Power Engineering Consulting Group; Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group; China Power Engineering Consultant Group Central Southern China Electric Power Design Institute Corp
Priority date: 2012-04-12
Filing date: 2012-04-12
Publication date: 2013-01-09
Anticipated expiration: 2022-04-12

Abstract

The utility model discloses a 300 kN duplex long-stick strain porcelain insulator string for +/- 400 kV direct-current lines. The 300 kN duplex long-stick strain porcelain insulator string comprises a strain hanging point armour clamp, a connecting armour clamp, a long-stick porcelain insulator string, a grading ring and a strain wire clamp, wherein the strain hanging point armour clamp is arranged at the top of the strain string and used for connection with a tower body cross arm; the grading ring is located at the middle lower part of the strain insulator string and used for equalizing the surface voltage of the insulator string; and the strain wire clamp is located at the end portion of the strain insulator string and used for hanging a transmission conductor. The insulators of the 300 kN duplex long-stick strain porcelain insulator string are long-stick porcelain insulators and double hanging points are employed for the 300 kN duplex long-stick strain porcelain insulator string; the 300 kN duplex long-stick strain porcelain insulator string for +/- 400 kV direct-current lines provided by the embodiment of the utility model is capable of meeting the requirements of the +/- 400 kV direct-current lines.

Description

The long excellent porcelain insulator strain insulator-string of a kind of ± 400kV DC line 300kN duplex

Technical field

The utility model relates to the High-Voltage Insulation field, particularly relates to the long excellent porcelain insulator strain insulator-string of a kind of ± 400kV DC line 300kN duplex.

Background technology

Before this ± and 500kV is the minimum voltage grade of China's direct current high tension transmission circuit, for picture Golmud～Lhasa work transmission line, because the load of Tibet Power Grid is less, employing ± 500kV economy is not good.In order to carry out the strategic objective of the Party Central Committee, State Council's enforcement " development of the West Regions ", alleviate the recent short of electricity situation of electrical network in the Tibetan, satisfy Tibet at a specified future date social economy to the requirement of electric power development, taking into account simultaneously economic feasibility, China is successfully completed ± the developing of 400kV HVDC Transmission Technology.

± 400kV DC power transmission line load less, insulator string is also different simultaneously, can not indiscriminately imitate the line insulator string of existing other electric pressure.Therefore, the long excellent porcelain insulator strain insulator-string of design ± 400kV DC power transmission line 300kN duplex is the technical problem that those skilled in the art are badly in need of solving.

The utility model content

That technical problem to be solved in the utility model provides is a kind of ± and the long excellent porcelain insulator strain insulator-string of 400kV DC power transmission line 300kN duplex, can satisfy ± requirement of 400kV DC power transmission line.

For achieving the above object, the long excellent porcelain insulator strain insulator-string of a kind of ± 400kV DC power transmission line 300kN duplex that the utility model provides, described strain insulator-string comprise strain insulator hardware, connection gold utensil, long excellent porcelain insulating substring, grading ring and strain clamp; Wherein,

Described strain insulator hardware is used for being connected with the body of the tower cross-arm at the strain insulator-string top; Described grading ring is positioned at described strain insulator string middle and lower part, is used for uniform insulation substring surface voltage; Described strain clamp is positioned at described strain insulator string end, is used for hanging transmission pressure;

The insulator of the long excellent porcelain insulator strain insulator-string of described 300kN duplex adopts long excellent porcelain insulator; The long excellent porcelain insulator strain insulator-string of described 300kN duplex adopts the double hanging point form.

Preferably, the insulator of described strain insulator-string adopts long excellent porcelain insulator, has the mechanical strength height, the advantage of stable performance.

The material of the connection gold utensil of described strain insulator-string is: container slab, structural alloy steel, carbon constructional quality steel, austenitic stainless steel, aluminum or aluminum alloy.

The strain insulator hardware of described strain insulator-string adopts GD-42S/32 trunnion hanging panel gold utensil to be connected with the body of the tower cross-arm, and the wire tension-resistant hardware all adopts double hanging point.

Preferably, the drainage plate of described strain insulator-string adopts two plate plug-in types.

Preferably, the conductor strain clamp of described strain insulator-string adopts the hydraulic strain clamp.

Compared with prior art, the utlity model has following advantage:

The long excellent porcelain insulator strain insulator-string of a kind of ± 400kV DC power transmission line 300kN duplex that the utility model provides.For satisfy height above sea level more than 3500 meters regional hvdc transmission line press all that the specific (special) requirements of shielding, the grading ring of insulator string and shading ring have been carried out multiplely all pressing, the corona experiment of Shielding plan; The connection gold utensil of strain insulator string adopts special substance, has good cryogenic property, can guarantee the safe operation of engineering.The strain insulator hardware of described strain insulator-string adopts GD-42S/32 trunnion hanging panel gold utensil to be connected with the body of the tower cross-arm, and the wire tension-resistant hardware all adopts double hanging point.

Description of drawings

Fig. 1 is the long excellent porcelain insulator strain insulator-string figure of of the present utility model ± 400kV DC power transmission line 300kN duplex;

Fig. 2 is the long excellent porcelain insulator strain insulator-string end view of 300kN duplex described in the utility model.

Embodiment

For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

With reference to Fig. 1, Fig. 2, be the long excellent porcelain insulator strain insulator-string figure of of the present utility model ± 400kV DC power transmission line 300kN duplex.

The long excellent porcelain insulator strain insulator-string of described 300kN duplex comprises: hardware 1, connection gold utensil 5, long excellent porcelain insulator 8, grading ring 18 and strain clamp 22.

Described hardware 1 is arranged on described strain insulator string top, adopts the superior GD-42S/32 trunnion hanging panel gold utensil of stress performance, is used for being connected with the body of the tower cross-arm, and the strain insulator hardware adopts double hanging point.

Described connection gold utensil 5 is positioned at the middle part of described strain insulator string, is used for the connection between hardware, composite insulator, the strain clamp.Connect gold utensil and adopt New Type Material, have good cryogenic property.

Described porcelain insulator 8 is positioned at the middle part of described strain insulator-string.The insulator of the long excellent porcelain insulator strain insulator-string of described 300kN duplex adopts long excellent porcelain insulator, has the mechanical strength height, the advantage of stable performance.

Described grading ring 18 is arranged on the end of long excellent porcelain insulator, is used for improving voltage distribution on the insulator string, can make insulator avoid flash burn.

Described strain clamp 22 is used for hanging both sides phase transmission pressure, adopts hydraulic.

Preferably, the connection gold utensil of described strain insulator-string adopts special substance, has good cryogenic property, can guarantee the safe and reliable operation of engineering.

Preferably, the grading ring of described strain insulator-string and shading ring have carried out multiplely all pressing, the corona experiment of Shielding plan, filled up height above sea level more than 3500 meters regional hvdc transmission line all press the blank of Shielding plan.

More than the long excellent porcelain insulator strain insulator-string of provided by the utility model ± 400kV DC power transmission line 300kN duplex is described in detail, used specific case herein principle of the present utility model and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.

Claims

1. the long excellent porcelain insulator strain insulator-string of one kind ± 400kV DC line 300kN duplex is characterized in that, the long excellent porcelain insulator strain insulator-string of described 300kN duplex comprises the strain insulator hardware, connects gold utensil, porcelain insulating substring, grading ring and strain clamp; Wherein,

Described strain insulator hardware is used for being connected with the body of the tower cross-arm at the strain insulator-string top; Described grading ring is positioned at described strain insulator string middle and lower part, is used for uniform insulation substring surface voltage; Described strain clamp is positioned at described suspension insulator end, is used for hanging transmission pressure;

2. the long excellent porcelain insulator strain insulator-string of according to claim 1 ± 400kV DC line 300kN duplex is characterized in that, the insulator of described strain insulator-string adopts long excellent porcelain insulator.

3. according to claim 1 ± 400kV DC line 300kN duplex is grown excellent porcelain insulator strain insulator-string, it is characterized in that, the strain insulator hardware of described strain insulator-string adopts GD-42S/32 trunnion hanging panel gold utensil to be connected with the body of the tower cross-arm, and the wire tension-resistant hardware all adopts double hanging point.

4. the long excellent porcelain insulator strain insulator-string of according to claim 1 ± 400kV DC line 300kN duplex is characterized in that the conductor strain clamp of described strain insulator-string adopts the hydraulic strain clamp.

5. according to claim 1 ± 400kV DC line 300kN duplex is grown excellent porcelain insulator strain insulator-string, it is characterized in that the material of the connection gold utensil of described strain insulator-string is: container slab, structural alloy steel, carbon constructional quality steel, austenitic stainless steel, aluminum or aluminum alloy.