CN1235235C - Capacity uniform voltage type stick shape suspending composite insulator - Google Patents
Capacity uniform voltage type stick shape suspending composite insulator Download PDFInfo
- Publication number
- CN1235235C CN1235235C CN 02149754 CN02149754A CN1235235C CN 1235235 C CN1235235 C CN 1235235C CN 02149754 CN02149754 CN 02149754 CN 02149754 A CN02149754 A CN 02149754A CN 1235235 C CN1235235 C CN 1235235C
- Authority
- CN
- China
- Prior art keywords
- insulating part
- insulator
- casting die
- composite insulator
- voltage type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Insulators (AREA)
Abstract
The present invention relates to a high-voltage power transmission equipment technology, particularly, a capacitance uniform voltage type rod-shaped suspended composite insulator which comprises an insulating part, wherein equalizing rings are arranged on metals on both ends of the insulating part; simultaneously, at least one equalizing ring is arranged between the equalizing rings positioned on both of the two ends on the insulating part. Main capacitance is formed among the equalizing rings and among the equalizing ring and the equalizing rings on both of the two ends of the insulator for reaching the action that the main capacitance among main insulations of the composite insulator is increased. Thereby, the influence of stray capacitance generated by the composite insulator and an iron tower, a conducting wire, etc. to electric field distribution is reduced so that axial electric field distribution of the composite insulator is uniform, all the insulating length is fully utilized, and occurrence of various accidents of electric corona, flashover, brittle failures, etc. of a power transmission line is eliminated.
Description
Technical field:
The present invention relates to the high-tension transmission equipment and technology, refer in particular to a kind of capacity uniform voltage type composite rod insulator.
Background technology:
Develop rapidly along with power industry, power department has been built many important high voltages, big capacity, long-distance transmission line, on these high-tension transmission circuits, transmission pressure is to rely on porcelain insulator, glass insulator, porcelain rod insulator and composite rod insulator to be suspended on the iron tower.The safe and reliable operation of these insulators is keys of transmission line safety.And existing porcelain, glass insulator are to be connected in series one by one to hang transmission line, and all there are chapeau de fer, steel pin in the two ends of monolithic porcelain, glass insulator.Form every main capacitance between chapeau de fer, the steel pin, in addition, chapeau de fer, steel pin over the ground, to iron tower, to also having stray capacitance between the lead, these stray capacitances make the voltage skewness along insulator string, main capacitance is more little, and the axial Electric Field Distribution of insulator string is inhomogeneous more.
On bar type suspended compound insulator (synthetic insulator) volume structure and porcelain and the glass suspension insulator structure very big difference is arranged, synthetic insulator only up and down two ends the metal termination is arranged, and it is small-sized, the main capacitance that two metal terminations and intermediate insulation body constitute together is much smaller than the main capacitance of porcelain and glass insulation substring, so the Electric Field Distribution of synthetic insulator is more inhomogeneous.Transmission line voltage is high more, and the synthetic insulator structure length is long more, and electric field strength is just more inhomogeneous.When maximum field intensity in the non-uniform electric field surpasses the disruptive field intensity of air, will produce corona discharge, cause energy loss and radio interference, a large amount of ozone that corona discharge causes cause the aging of insulating material very soon.The field intensity that simultaneous altitude is concentrated causes Leakage Current increase in the insulating material in the synthetic insulator, causes the inner partial discharge long term high temperature heating of plug to cause the aging and brittle failure of plug epoxy resin and glass fiber material.In order to address the above problem, the synthetic insulator of two ends band grading ring appears subsequently, promptly on the gold utensil of synthetic insulator two ends, assemble grading ring.Before not adorning grading ring, because the Electric Field Distribution inequality, synthetic insulator is actual to have only 15% insulated lengths to work, and promptly 15% insulated lengths is born 100% operating voltage, and synthetic insulator has 85% insulated lengths not work.After grading ring is installed at the synthetic insulator two ends, though the unevenness of Electric Field Distribution can be improved effectively, still have 40% insulated lengths not work, thereby still very high in the electric field strength of the high-pressure side of synthetic insulator.Although the air gap can not puncture, the composite insulator core bar material still is easy to cause partial discharge and local accelerated ageing because of excessive Leakage Current causes local overheating under high electric field strength effect, causes taking place brittle failure etc. and falls to go here and there major break down.
Summary of the invention:
The objective of the invention is to overcome the defective of prior art, provide a kind of reasonable synthetic insulator axial electric field that improves to distribute, effectively utilize whole insulated lengths, can eliminate the capacity uniform voltage type composite rod insulator of the various accidents generations such as corona, flashover and brittle failure of transmission line.
The present invention is achieved through the following technical solutions: be provided with an equal casting die on the insulating part, between the grading ring of two ends at least; Described equal casting die is merged by several portions and forms, and its metal coating that is installed on the plug that is crimped on insulating part in advance puts; Adopt high temperature silicon rubber injection outsourcing sealing on the described metal protection protector between end and the insulating part, and adopt sealing in the high temperature silicon rubber injection between the lower end of metal protection protector and the insulating part.
Described insulating part also can be divided into more piece in advance, and each joint connects by gold utensil, and equal casting die is installed on gold utensil.
Described equal casting die is circular ring body or plate body, and shape is measure-alike or different outside the grading ring at its overall dimension and insulating part two ends.
One or more equal casting dies are installed in the present invention additional in the middle of synthetic insulator, utilize between the equal casting die and the main capacitance that constitutes between the grading ring at equal casting die and insulator two ends, reach the effect that has increased the main capacitance between synthetic insulator main insulation, thereby reduce of the influence of the stray capacitance of generations such as synthetic insulator and iron tower, lead to Electric Field Distribution, so that the synthetic insulator axial electric field is evenly distributed, make full use of whole insulated lengths, eliminated the generation of the various accidents such as corona, flashover and brittle failure of transmission line.
Description of drawings:
Accompanying drawing 1 is a structural formula intention of the present invention;
Accompanying drawing 2 is for metal protection protector of the present invention, all casting die is connected with plug and seals schematic diagram;
Accompanying drawing 3 is for installing the structural formula intention of an equal casting die additional in the middle of the insulating part;
Accompanying drawing 4 installs the connection diagram of equal casting die for insulating part additional after being divided into two joints;
Accompanying drawing 5 is divided into the connection diagram that installs equal casting die after the more piece additional for insulating part.
Specific embodiments:
See accompanying drawing 1～3, the present invention includes insulating part 1, the silicon rubber umbrella sheath of insulating part 1 is the integral molded plastic moulding, and its plug 11 is the acidproof plug of ECR modified form.On the gold utensil at insulating part 1 two ends grading ring 2 is installed, also has additional one or more equal casting dies 3 on the while insulating part 1, between two ends grading ring 2 at interval.All casting die 3 is made up of the halved body merging; and be installed on the metal protection protector 4 on the plug 11 that is crimped on insulating part 1 in advance; adopt high temperature silicon rubber injection outsourcing sealing between end on the metal protection protector 4 (promptly near the iron tower end) and the insulating part 1, and adopt sealing in the high temperature silicon rubber injection between the lower end of metal protection protector 4 (promptly hanging conductor wire end) and the insulating part 1.
According to main capacitance C between plate be: C=ε * S/L, wherein ε is the air dielectric coefficient, and S is equal casting die equivalent area, and L is a distance between equal casting die; Thereby learn main capacitance size between plate, be proportional to equal casting die equivalent area, be inversely proportional to the distance between equal casting die.When installing an equal casting die 3 additional for a certain position in the middle of the insulating part 1, all constitute two capacitor C 1 respectively between original grading ring 2 at the two ends of casting die 3 and insulating part 1, C2, and the distance L between plate shortens relatively in twos, thereby increased the main capacitance between plate, so that main capacitance much larger than insulator over the ground, to lead, stray capacitance to iron tower, the effect of stray capacitance reduces, thereby force synthetic insulator axial electric field intensity V1, V2 is according to capacitor C between plate 1, the big or small inverse proportion redistribution of C2, be V=V1+V2, V1/V2=C2/C1, equal casting die 3 in the middle of supposing is H1 from high-pressure side (extension conductor wire end) distance, and is H2 from the low-pressure end distance, then:
V1/V2＝H1/H2
From last analysis as can be known, the axial voltage of synthetic insulator distribute with plate between distance be directly proportional, after close high-pressure side increases an equal casting die 3 in the middle of synthetic insulator, can reduce high-pressure side electric field strength and transfer to the synthetic insulator middle part, utilize more insulated part to bear all voltages, slow down The Ageing of Insulators, prolong its useful life, eliminate contingency and take place.
When installing a plurality of equal casting die 3 in the middle of the insulator additional, according to the axial voltage of synthetic insulator distribute with plate between distance be directly proportional, then:
V＝V1+V2+……+Vn， H＝H1+H2+……+Hn
V1/Vn＝H1/Hn C1/Cn＝Hn/H1
Thus, after in the middle of insulator, increasing a plurality of equal casting dies, the synthetic insulator axial electric field distributes and is tending towards even, make the insulated part of synthetic insulator be utilized effectively, bear all voltages jointly, slow down The Ageing of Insulators, prolong its useful life, the various accidents such as corona, flashover and brittle failure of having eliminated transmission line take place.
Accompanying drawing 4 installs the connection diagram of equal casting die for insulating part additional after being divided into two joints, and accompanying drawing 5 is divided into the connection diagram that installs equal casting die after the more piece additional for insulating part, end gold utensil by each section insulating part 1 interconnects, and equal casting die 3 is installed on corresponding gold utensil, thereby be implemented in the middle effect that installs equal casting die 3 additional of insulator, increased the main capacitance between plate, main capacitance much larger than insulator over the ground, to lead, stray capacitance to iron tower, thereby the effect of stray capacitance reduces, force the synthetic insulator axial electric field according to the redistribution of each section main capacitance size, so that the synthetic insulator axial electric field distributes and is tending towards evenly making the insulated part of synthetic insulator be utilized effectively.
Simultaneously; when the present invention's metal protection protector 4 itself and plug 11 crimping; the sealing of outer-enwraped type high-temperature silicon disulfide rubber general injection is adopted in its upper end (low-pressure end); and lower end (high-pressure side) adopts interior injecting type high-temperature silicon disulfide rubber sealing; so that draining blowdown in the work utilization is beneficial to the protection insulator.
Claims (3)
1, capacity uniform voltage type composite rod insulator, include insulating part (1), on the gold utensil at insulating part (1) two ends grading ring (2) is installed, it is characterized in that: described insulating part (1) goes up, be positioned at and be provided with an equal casting die (3) between the two ends grading ring (2) at least; Described equal casting die (3) is merged by several portions and forms, and it is installed on the metal protection protector (4) on the plug (11) that is crimped on insulating part (1) in advance; Adopt high temperature silicon rubber injection outsourcing sealing on the described metal protection protector (4) between end and the insulating part (1), and adopt sealing in the high temperature silicon rubber injection between the lower end of metal protection protector (4) and the insulating part (1).
2, according to claims 1 described capacity uniform voltage type composite rod insulator, it is characterized in that: described insulating part (1) also can be divided into more piece in advance, and each joint connects by gold utensil, and equal casting die (3) is installed on gold utensil.
3, according to claims 1 described capacity uniform voltage type composite rod insulator, it is characterized in that: described equal casting die (3) is circular ring body or plate body, and the overall dimension of the grading ring (2) at its overall dimension and insulating part (1) two ends can be identical or different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02149754 CN1235235C (en) | 2002-12-27 | 2002-12-27 | Capacity uniform voltage type stick shape suspending composite insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02149754 CN1235235C (en) | 2002-12-27 | 2002-12-27 | Capacity uniform voltage type stick shape suspending composite insulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1512520A CN1512520A (en) | 2004-07-14 |
| CN1235235C true CN1235235C (en) | 2006-01-04 |
Family
ID=34233782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02149754 Expired - Lifetime CN1235235C (en) | 2002-12-27 | 2002-12-27 | Capacity uniform voltage type stick shape suspending composite insulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1235235C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386827C (en) * | 2006-04-30 | 2008-05-07 | 西安交通大学 | Composite insulator big and small strapped configuration structure for super/extra high voltage transmission line |
| CN102298996B (en) * | 2011-08-31 | 2013-03-06 | 清华大学 | Extra-high voltage composite insulator with uniform electric-field distribution |
| CN102360645B (en) * | 2011-10-13 | 2012-11-21 | 湖南省电力公司科学研究院 | Indirectly inserted ice flashover resistant insulator |
| CN103187129B (en) * | 2013-03-01 | 2016-02-24 | 湖南省电力公司科学研究院 | Ice-covering-proof equal platen |
| CN103245895B (en) * | 2013-04-22 | 2015-06-24 | 安徽省电力科学研究院 | Anticorona discharge connection device for pressurization in high-voltage test |
| CN107393704B (en) * | 2017-07-07 | 2019-06-25 | 北京电力设备总厂有限公司 | The indoor arrangement dry-type hollow smoothing reactor pressure-equalizing device of ± 1100kV |
-
2002
- 2002-12-27 CN CN 02149754 patent/CN1235235C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1512520A (en) | 2004-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201174264Y (en) | Tubular dielectric bus | |
| CN205609777U (en) | Locking joint | |
| CN203397798U (en) | Built-in column type voltage limiter for overhead conductor | |
| CN205050651U (en) | High -tension bushing and isolated bus | |
| CN1235235C (en) | Capacity uniform voltage type stick shape suspending composite insulator | |
| CN211294756U (en) | Combined split porcelain insulator | |
| CN106469594A (en) | High voltage insulation structure, cable termination, bus, bushing and bushing shell for transformer | |
| CN101354933B (en) | Internal electrode for composite insulator and equalizing ring configuring method as well as composite insulator thereof | |
| CN204376358U (en) | 500kV twisted polyethylene cable accessory structure | |
| CN112863786A (en) | Novel dry-type sleeve for electric power system | |
| CN210380208U (en) | Overhead insulated wire terminal | |
| CN201489922U (en) | Embedded segmented connecting composite insulator | |
| CN104409183B (en) | A kind of built-in capacitance presses the composite insulator of screen | |
| CN1255821C (en) | Unit serial compound insulator | |
| CN100449653C (en) | High-pressure insulation core with lining layer | |
| CN105825956A (en) | Method for processing novel composite silicone rubber solid insulated bus | |
| CN205811469U (en) | A kind of high-voltage wall bushing of three element structures | |
| CN210927054U (en) | Novel indoor and outdoor terminal of high-voltage power cable | |
| Fujimura | The evolution of porcelain insulator technology in Japan | |
| CN206349530U (en) | A kind of modified Wiring nose | |
| CN205377244U (en) | A stress cone for high voltage dc cable annex | |
| CN201233801Y (en) | Dry sheath for stress cone type transformer | |
| CN101577172B (en) | Stress cone type dry sleeve of transformer | |
| CN211239286U (en) | Novel series connection type high-voltage power cable indoor and outdoor terminal | |
| CN217788045U (en) | Flame-retardant all-insulated tubular bus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: DONGGUAN HIGH ENERGY ELECTRICAL CO., LTD. Free format text: FORMER NAME OR ADDRESS: GAONENG INDUSTRY CO., LTD., DONGGUAN CITY |
|
| CP03 | Change of name, title or address |
Address after: No. 2, Fai Fai Road, Dongguan, Guangdong, Dongcheng District Patentee after: DONGGUAN GAONENG ELECTRIC Co.,Ltd. Address before: Sha Gang Industrial Road, upper bridge, Dongguan, Dongcheng District, Guangdong Patentee before: DONGGUAN GAONENG INDUSTRIAL Co.,Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: CHANGYUAN GAONENG ELECTRIC CO., LTD. Free format text: FORMER NAME: DONGGUAN GAONENG ELECTRIC CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 523111 No. 2, Fai Fai Road, Dongguan, Guangdong, Dongcheng District Patentee after: Changyuan High Energy Electric Co.,Ltd. Address before: 523111 No. 2, Fai Fai Road, Dongguan, Guangdong, Dongcheng District Patentee before: DONGGUAN GAONENG ELECTRIC Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20060104 |
|
| CX01 | Expiry of patent term |