CN111697359A - Self-lubricating sliding support structure for GIL equipment - Google Patents
Self-lubricating sliding support structure for GIL equipment Download PDFInfo
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- CN111697359A CN111697359A CN202010670598.0A CN202010670598A CN111697359A CN 111697359 A CN111697359 A CN 111697359A CN 202010670598 A CN202010670598 A CN 202010670598A CN 111697359 A CN111697359 A CN 111697359A
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- grounding
- grounding electrode
- shell
- insulating pad
- support structure
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/20—Cable fittings for cables filled with or surrounded by gas or oil
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
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Abstract
The invention relates to a self-lubricating sliding support structure for GIL equipment, which comprises a support insulator, a conductor and a shell, wherein the support insulator is connected with the shell through a plurality of grounding devices, each grounding device comprises a grounding insert embedded into the support insulator, a support connecting piece is arranged in the grounding insert, a grounding electrode is arranged on the support connecting piece through an insulating pad and a spring, two through holes and an annular groove are arranged below the insulating pad, the spring is arranged in the two through holes and the annular groove, the grounding electrode is arranged above the spring, the height of the insulating pad is lower than that of the grounding electrode, and only the connection between the grounding electrode and the shell is realized. The lubricating performance of the grounding electrode is obviously enhanced, the frictional resistance is reduced, and the shell is prevented from being scratched when the grounding electrode is installed; when the grounding electrode and the shell surface repeatedly move to generate particles, the particle collection effect is obvious, the particles are limited to the ground potential, and the particles are prevented from flowing away under the action of the electric field force.
Description
Technical Field
The invention belongs to the field of high-voltage and ultra-high voltage power transmission, particularly relates to a grounding electrode, and particularly relates to a self-lubricating grounding electrode for GIL equipment.
Background
Rigid gas insulated transmission line (GIL) is a novel power transmission mode, has been successfully applied to nuclear power, water and electricity and city utility tunnel engineering, and GIL has advantages such as long service life, high reliability, security performance are strong. When foreign matters are attached to the surface of the insulator, the insulation performance of the insulator is reduced, and finally, flashover of the insulator along the surface is caused, so that the normal operation of a power grid is influenced, and therefore the foreign matters are extremely strictly controlled during installation of GIL products. Under the influence of environmental factors, the GIL inevitably generates the changes of expansion with heat and contraction with cold in the live-line operation process, and the sliding support insulator and the conductor move synchronously and generate relative displacement with the cylinder; the grounding electrode and the cylinder body of the sliding support structure belong to elastic support, foreign matters such as particles are easily caused in the reciprocating motion process, and when the foreign matters are attached to the surface of an insulator, the insulator surface flashover is easily caused, and the normal operation of a power grid is influenced.
Among the prior art telluric electricity field includes spacing insulating pad, telluric electricity field, spring etc. telluric electricity field and casing pass through the spring and realize elastic support, realize the installation of spring and telluric electricity field through spacing insulating pad, avoid the slope of spring, cause telluric electricity field and casing contact failure. In practical application, due to improper material selection of the grounding electrode, scratches are easily formed between the grounding electrode and the shell during installation; during the reciprocating movement of the ground electrode and the shell, foreign matter such as particles is generated by friction.
Disclosure of Invention
In order to solve the above problems, the present invention provides a self-lubricating ground electrode for a GIL apparatus, which optimizes a ground electrode material, increases a self-lubricating function, reduces a frictional force, optimizes an insulating pad, and collects foreign substances such as particles.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the invention relates to a self-lubricating sliding support structure for GIL equipment, which comprises a support insulator, a conductor and a shell, wherein the support insulator is connected with the shell through a plurality of grounding devices, each grounding device comprises a grounding insert embedded into the support insulator, a support connecting piece is arranged in the grounding insert, a grounding electrode is arranged on the support connecting piece through an insulating pad and a spring, two through holes and an annular groove are arranged below the insulating pad, the spring is arranged in the two through holes and the annular groove, the grounding electrode is arranged above the spring, the height of the insulating pad is lower than that of the grounding electrode, and only the connection between the grounding electrode and the shell is realized.
The invention is further improved in that: the upper surface of the insulating pad is arc-shaped and is attached to the inner wall of the arc-shaped shell.
The invention is further improved in that: a waist-shaped groove for collecting particles generated by long-time reciprocating friction motion between the grounding electrode and the shell is arranged on the arc-shaped upper surface of the insulating pad.
The invention is further improved in that: the grounding electrode is composed of the following raw materials in percentage by mass: the red copper content is 95 percent, and the graphite content is 5 percent.
The invention is further improved in that: two adjacent grounding devices are connected through a particle catcher, and the end point of the particle catcher is inserted and arranged between the grounding insert and the connecting piece.
The invention has the beneficial effects that: the graphite is added to the grounding electrode, so that the lubricating property of the grounding electrode is obviously enhanced, the frictional resistance is reduced, and the shell is prevented from being scratched when the grounding electrode is installed; when the grounding electrode and the shell surface repeatedly move to generate particles, the particle collection effect is obvious, the particles are limited to the ground potential, and the particles are prevented from flowing away under the action of the electric field force.
Drawings
Fig. 1 is a schematic view of the sliding support structure of the present invention.
Fig. 2 is a schematic structural diagram of the grounding device of the present invention.
Fig. 3 is a front view of the insulating mat of the present invention.
Fig. 4 is a top view of the insulating pad of the present invention.
Detailed Description
In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the embodiments of the invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
As shown in fig. 1-4, the present invention is a self-lubricating sliding support structure for GIL equipment, the sliding support structure comprises a support insulator 3, a conductor 4 and a housing 5, the support insulator 3 is connected with the housing 5 through a plurality of grounding devices 1 to realize elastic contact between a grounding electrode and the housing, two adjacent grounding devices 1 are connected through a particle catcher 2, an end point of the particle catcher 2 is inserted and arranged between the grounding inserts 1-4 and a connecting piece 1-3, each grounding device 1 comprises a grounding insert 1-4 embedded into the support insulator 3, a support connecting piece 1-3 is arranged in the grounding insert 1-4, the grounding electrode 1-1 is arranged on the support connecting piece 1-3 through an insulating pad 1-2 and a spring, two through holes and an annular groove are arranged below the insulating pad 1-2, the spring is arranged in the two through holes and the annular groove, the grounding electrode 1-1 is arranged above the spring, the contact between the grounding electrode and the shell in the grounding device is mainly realized through the spring, the height of the insulating pad 1-2 is lower than that of the grounding electrode 1-1, the contact between the insulating pad 1-2 and the shell is avoided, only the connection between the grounding electrode 1-1 and the shell 5 is realized, the insulating pad 1-2 realizes a certain flexible adjusting effect through the spring, the insulating pad 1-2 is compressed downwards to enable the grounding electrode 1-1 to be in contact with the inner wall of the shell 5, the grounding device enters the shell 5 along with a sliding support structure to realize linear motion, the upper surface of the insulating pad 1-2 is arc-shaped and is attached to the inner wall of the shell 5, and the collection grounding electrode 1-1 and the shell 5 are arranged on the arc-shaped upper surface of the insulating pad 1-2 and the waist-shaped grooves 1-5 are preferably arranged symmetrically, and the number of the waist-shaped grooves is 2.
After the grounding electrode is contacted with the shell, the grounding electrode reciprocates relative to the shell, foreign matters such as particles and the like are inevitably generated after long-term operation, and the foreign matters are firstly attached to the upper surface of the grounding electrode after being generated, the waist-shaped groove can collect the foreign matters generated in the operation process of the grounding electrode, so that the particles are limited at the ground potential, the movement of the particles under the action of electric field force is reduced, the probability of the particles being attached to an insulating part is reduced, the insulating property of equipment is further improved, and the risk of flashover of the insulating part along the surface is reduced, wherein the grounding electrode 1-1 is composed of the following raw materials in mass ratio: the grounding device comprises 95% of red copper and 5% of graphite, wherein graphite is added into a grounding electrode as a lubricant, the physical property of the grounding electrode is changed, the friction factor is reduced, the frictional resistance is further reduced, the lubricant is added to reduce the hardness of the material of the grounding electrode, the flexibility is increased, the mechanical damage to a shell during the mounting and reciprocating motion of the grounding electrode is avoided, the self-lubricating function of the grounding electrode is realized, according to the relevant requirements of special mechanical tests of a sliding contact of GB/T22383-2017 & lt72.5 kV & gt rigid gas insulated transmission line & gt, the graphite electrode is mounted on the grounding device with three sliding supports, the relative motion of the three sliding supports (including the grounding electrode) and the shell during thermal expansion and cold contraction is simulated, and the test times. The sliding three-support reciprocating motion drives the grounding electrode and the shell to move relatively, so that the practical application working condition of the grounding electrode is realized, after graphite is added, the scratching phenomenon of the shell can be effectively reduced by the grounding electrode, and the quantity of foreign matters generated by the grounding electrode and the shell due to friction is reduced.
Aiming at the phenomena that scratches are generated between the grounding electrode and the shell and particles are generated when the grounding electrode and the shell move relatively during GIL installation and operation, the technical defect that the particles are attached to the insulator is overcome.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (5)
1. A self-lubricating sliding support structure for GIL equipment, sliding support structure includes support insulator (3), conductor (4) and casing (5), its characterized in that: the supporting insulator (3) is connected with the shell (5) through a plurality of grounding devices (1), each grounding device (1) comprises a grounding insert (1-4) embedded into the supporting insulator (3), a supporting connecting piece (1-3) is arranged in the grounding insert (1-4), the grounding electrode (1-1) is arranged on the supporting connecting piece (1-3) through an insulating pad (1-2) and a spring, two through holes and an annular groove are arranged below the insulating pad (1-2), a spring is arranged in the two through holes and the annular groove, the grounding electrode (1-1) is arranged above the spring, the height of the insulating pad (1-2) is lower than that of the grounding electrode (1-1), and only the grounding electrode (1-1) is connected with the shell (5).
2. The self-lubricating sliding support structure for the GIL apparatus of claim 1, wherein: the upper surface of the insulating pad (1-2) is arc-shaped and is attached to the inner wall of the arc-shaped shell (5).
3. The self-lubricating sliding support structure for the GIL apparatus of claim 2, wherein: the arc-shaped upper surface of the insulating pad (1-2) is provided with a waist-shaped groove (1-5) for collecting particles generated by long-time reciprocating friction motion between the grounding electrode (1-1) and the shell (5).
4. The self-lubricating sliding support structure for the GIL apparatus of claim 1, wherein: the grounding electrode (1-1) is composed of the following raw materials in percentage by mass: the red copper content is 95 percent, and the graphite content is 5 percent.
5. The self-lubricating sliding support structure for the GIL apparatus of claim 1, wherein: two adjacent grounding devices (1) are connected through a particle catcher (2), and the end point of the particle catcher (2) is inserted and arranged between the grounding insert (1-4) and the connecting piece (1-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010670598.0A CN111697359A (en) | 2020-07-13 | 2020-07-13 | Self-lubricating sliding support structure for GIL equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010670598.0A CN111697359A (en) | 2020-07-13 | 2020-07-13 | Self-lubricating sliding support structure for GIL equipment |
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| Publication Number | Publication Date |
|---|---|
| CN111697359A true CN111697359A (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010670598.0A Pending CN111697359A (en) | 2020-07-13 | 2020-07-13 | Self-lubricating sliding support structure for GIL equipment |
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| CN (1) | CN111697359A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112712942A (en) * | 2020-12-14 | 2021-04-27 | 平高集团有限公司 | Insulator assembly and high-voltage switch equipment using same |
| CN112928502A (en) * | 2021-02-01 | 2021-06-08 | 江苏恒高电气制造有限公司 | Grounding structure for rigid power transmission line |
-
2020
- 2020-07-13 CN CN202010670598.0A patent/CN111697359A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112712942A (en) * | 2020-12-14 | 2021-04-27 | 平高集团有限公司 | Insulator assembly and high-voltage switch equipment using same |
| CN112712942B (en) * | 2020-12-14 | 2022-07-05 | 平高集团有限公司 | Insulator assembly and high-voltage switch equipment using same |
| CN112928502A (en) * | 2021-02-01 | 2021-06-08 | 江苏恒高电气制造有限公司 | Grounding structure for rigid power transmission line |
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