CN113552503A - End screen grounding and state detection device for high-voltage oilpaper capacitive bushing - Google Patents
End screen grounding and state detection device for high-voltage oilpaper capacitive bushing Download PDFInfo
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- CN113552503A CN113552503A CN202110793710.4A CN202110793710A CN113552503A CN 113552503 A CN113552503 A CN 113552503A CN 202110793710 A CN202110793710 A CN 202110793710A CN 113552503 A CN113552503 A CN 113552503A
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- end screen
- grounding
- bolt
- out terminal
- leading
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
Abstract
The invention discloses a device for detecting the end screen grounding and state of a high-voltage oilpaper capacitive bushing, which comprises an equipment main body and a protective cover, wherein the protective cover is arranged at the top of the equipment main body, a fastening piece is arranged on one side of the equipment main body, the fastening piece comprises a sealing gasket arranged at the bottom of the fastening piece and a fastening bolt connected with the upper end of the sealing piece, the reliable contact between the end screen grounding cover and an end screen leading-out terminal can be improved through the structure of the end screen grounding bolt and the detection bolt, the contact condition between the end screen leading-out terminal and the end screen grounding bolt can be determined through screwing-in depth, the loosening condition similar to a spring structure can not occur in long-term operation, the reliability is higher, a positioning bolt is penetratingly connected between an insulating fixing sleeve and the end screen leading-out terminal, the end screen leading-out terminal and the insulating fixing sleeve can be further fastened into a whole through the positioning bolt structure, and the end screen leading-out terminal can be prevented from rotating along with the bolt due to the rotation of the end screen grounding bolt or the detection bolt in the maintenance process, avoid causing the end screen broken string.
Description
Technical Field
The invention relates to the technical field of high-voltage bushing end screen grounding devices, in particular to an end screen grounding and state detection device for a high-voltage oilpaper capacitive bushing.
Background
High voltage bushings are one of the important components of transformers. The transformer is not only used for leading the inner winding of the transformer to the outlet device outside the oil tank through the lead, but also used for fixing the lead. At present, for the high-voltage side of a large oil-immersed power transformer, most of the high-voltage side of the large oil-immersed power transformer adopts an oilpaper capacitive bushing, the difference of the main insulating capacitive screen structure of the bushing is small, but the grounding structure for grounding the end screen has great difference. In actual operation, faults caused by poor grounding of the end screen of the sleeve account for the most part.
At present, the sleeve end screen is grounded mainly through a spring structure fixed on the grounding cover. When the grounding cover is covered, the spring structure on the grounding cover clamps the end screen leading-out terminal, so that the end screen is reliably grounded. Along with the increase of the operating life and the continuous increase of the maintenance times, the spring structure in the grounding cover can gradually loosen in the continuous plugging process, finally the contact between the spring structure and the end screen leading-out terminal is unreliable, the suspension potential discharge is generated in the operation, and the risk of sleeve explosion can be caused seriously or even. Moreover, after the maintenance is finished every time and the grounding cover is covered, the contact condition of the spring structure and the end screen leading-out terminal cannot be judged whether the end screen grounding is good or not through measurement, and serious potential safety hazards are brought to safe and stable operation of equipment.
Based on the above, the present invention provides a device for detecting the end screen grounding and state of a high voltage oilpaper capacitive bushing, so as to solve the above mentioned problems.
Disclosure of Invention
The invention aims to provide a device for detecting the end screen grounding and the state of a high-voltage oilpaper capacitive bushing, which solves the problems of reliable grounding of the end screen and detection of the reliability of grounding.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a last screen ground connection and state detection device for high-pressure oilpaper electric capacity type sleeve pipe, includes equipment main part and visor, and equipment main part top is installed the visor and is installed the fastener rather than one side, the fastener includes that the sealed pad that sets up of its bottom is connected with fastening bolt rather than the upper end.
Based on the technical characteristics, the protective cover prevents the grounding bolt from being corroded by rainwater in operation to cause unreliable grounding, the end screen grounding cover is reliably contacted with the sleeve grounding flange through the fastening piece, and the grounding flange is in a grounding state, so that the end screen grounding cover is also in a grounding state when reliably contacted with a grounding method.
Preferably, in the above end screen grounding and state detecting apparatus for a high voltage oilpaper capacitive bushing, the apparatus main body includes an end screen grounding cover disposed at an upper end thereof and a bushing grounding flange mounted at a bottom thereof.
Based on the technical characteristics, the end screen grounding cover and the sleeve grounding flange are matched with the fastener, so that the equipment main body is convenient to mount and dismount, and the internal components are convenient to inspect and maintain, so that the potential safety hazard of the high-voltage oilpaper capacitive sleeve is reduced.
Preferably, in the above end screen grounding and state detecting device for the high-voltage oil paper capacitive bushing, the end screen grounding cover includes an isolation cushion block arranged on one side of the outside of the end screen grounding cover and a detecting bolt connected to the side end of the isolation cushion block, and a detection cavity formed in the end screen grounding cover and an end screen grounding screw hole a formed in the upper end of the detection cavity.
Based on above-mentioned technical characteristics, it is continuous with end screen leading-out terminal that the detection bolt passes through threaded connection mode, and detection bolt does not have electrical connection with the ground cover, and the two are kept apart through insulating isolation cushion.
Preferably, in the above end screen grounding and state detecting device for the high-voltage oil paper capacitive bushing, the bushing grounding flange includes an insulating fixing sleeve disposed in the middle thereof and an end screen leading-out terminal mounted in the middle thereof, and a positioning bolt is further penetratingly connected between the insulating fixing sleeve and the end screen leading-out terminal.
Based on the technical characteristics, the positioning bolt can further fasten the end screen leading-out terminal and the insulating fixing sleeve into a whole, so that the end screen leading-out terminal is prevented from rotating along with the bolt when the end screen grounding bolt is rotated or the bolt is detected in the overhauling process, and the end screen disconnection is avoided.
Preferably, in the above end screen grounding and state detecting device for the high-voltage oil paper capacitive bushing, the end screen leading-out terminal includes an end screen grounding screw hole B formed in the top thereof and an end screen grounding bolt arranged inside the end screen grounding screw hole B, and a detection screw hole is further formed in a side end of the end screen leading-out terminal.
Based on the technical characteristics, the end screen grounding bolt is respectively and reliably contacted with the end screen grounding cover and the end screen leading-out terminal in a threaded connection mode, the end screen grounding bolt is reliably contacted with the end screen grounding cover and the end screen leading-out terminal in a normal working state, the end screen grounding bolt is also in a grounding state due to the fact that the end screen grounding cover is reliably connected with the end screen grounding bolt, and the end screen leading-out terminal is reliably connected with the end screen grounding bolt for grounding.
Preferably, in the above device for detecting the end screen grounding and the state of the high-voltage oil paper capacitive bushing, the diameter of the end screen grounding bolt is matched with the diameter of the end screen grounding screw hole B, and the diameter of the detection screw hole is matched with the diameter of the detection bolt hole.
Based on the technical characteristics, the end screen grounding screw hole B can promote the reliable contact of the end screen grounding bolt with the end screen grounding cover and the end screen leading-out terminal in threaded connection, the detection screw hole can promote the fixing effect of the detection bolt with the end screen leading-out terminal in threaded connection, and whether the sleeve end screen is reliably grounded or not can be judged by detecting the conduction condition between the bolt and the ground through the universal meter.
Compared with the prior art, the invention has the beneficial effects that: this kind of a terminal screen ground connection and state detection device for high-pressure oilpaper electric capacity type sheathed tube structural design is novel, through terminal screen earth bolt and detection bolt structure, can promote the reliable contact of terminal screen ground connection lid and terminal screen leading-out terminal, can make clear and definite terminal screen leading-out terminal and terminal screen earth bolt's the contact condition through the screw in degree of depth, the condition that similar spring structure is not hard up can not appear in long-term operation, the reliability is higher, through the positioning bolt structure, can be with terminal screen leading-out terminal and insulating fixed cover further fastening as an organic whole, prevent to rotate terminal screen earth bolt or detection bolt and cause terminal screen leading-out terminal to rotate along with the bolt in the maintenance in-process, avoid causing the terminal screen broken string.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural diagram of the main body of the apparatus of the present invention;
FIG. 3 is a schematic diagram of a detection cavity structure according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. an apparatus main body; 11. a final screen grounding cover; 111. isolating the cushion blocks; 112. detecting the bolt; 113. detecting the cavity; 1131. a tap grounding screw hole A; 12. a sleeve grounding flange; 121. insulating fixed sleeves; 122. a tail screen leading-out terminal; 1221. a tap ground bolt; 1222. a tap grounding screw hole B; 1223. detecting the screw hole; 123. positioning the bolt; 2. a protective cover; 3. a fastener; 31. a gasket; 32. and fastening the bolt.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 3, a device for detecting the grounding and state of the end screen of a high-voltage oilpaper capacitive bushing comprises a device body 1 and a protective cover 2, wherein the protective cover 2 is installed on the top of the device body 1, a fastening member 3 is installed on one side of the device body, the fastening member 3 comprises a sealing gasket 31 arranged on the bottom of the sealing gasket 31, and a fastening bolt 32 is connected with the upper end of the sealing gasket, the protective cover 2 prevents the grounding bolt from being corroded by rainwater during operation, so that the grounding is unreliable, the grounding cover 11 of the end screen is reliably contacted with a grounding flange 12 of the bushing through the fastening member 3, the grounding flange is in a grounding state when the grounding cover of the end screen is reliably contacted with the grounding flange, the device body 1 comprises the grounding cover 11 arranged on the upper end of the end screen and the grounding flange 12 of the bushing, the grounding cover 11 of the end screen and the grounding flange 12 of the bushing are matched with the fastening member 3, so that the device body 1 can be conveniently installed and disassembled, the high-voltage oilpaper capacitive bushing is convenient to inspect and maintain, potential safety hazards of the high-voltage oilpaper capacitive bushing are reduced, the end screen grounding cover 11 comprises an isolation cushion block 111 arranged on one side of the outer portion of the end screen grounding cover and a detection bolt 112 connected with the side end of the isolation cushion block, a detection cavity 113 formed in the end screen grounding cover 11 and the upper end of the detection cavity are provided with an end screen grounding screw hole A1131, the detection bolt 112 is connected with an end screen leading-out terminal 122 in a threaded connection mode, the detection bolt 112 is not electrically connected with the grounding cover 11, and the two are isolated through the isolation cushion block 111.
Referring to fig. 2 and 3 in the attached drawings of the specification, a device for detecting the end screen grounding and the state of a high-voltage oilpaper capacitive bushing, wherein a bushing grounding flange 12 comprises an insulating fixing sleeve 121 arranged in the middle of the bushing and an end screen leading-out terminal 122 arranged in the middle of the bushing, a positioning bolt 123 is further connected between the insulating fixing sleeve 121 and the end screen leading-out terminal 122 in a penetrating manner, the positioning bolt 123 can further fasten the end screen leading-out terminal 122 and the insulating fixing sleeve 121 into a whole to prevent the end screen leading-out terminal 122 from rotating along with a bolt due to the rotation of an end screen grounding bolt 1221 or a detection bolt 112 in the maintenance process, so as to avoid the end screen from breaking, the end screen leading-out terminal 122 comprises an end screen grounding screw hole B1222 formed in the top of the end screen leading-out terminal and an end screen grounding bolt 1221 arranged in the end screen leading-out terminal 122, the end screen grounding bolt 1223 is further formed in the side end of the end screen leading-out terminal 122, the end screen grounding bolt 1221 is respectively and reliably contacted with the end screen grounding cover 11 and the end screen leading-out terminal 122 in a threaded manner, in a normal working state, the end screen grounding bolt 1221 is reliably contacted with the end screen grounding cover 11 and the end screen leading-out terminal 122, because the end screen grounding cover 11 is reliably connected with the end screen grounding bolt 1221, therefore, the end screen grounding bolt 1221 is also in a grounding state, the end screen leading-out terminal 122 is reliably connected with the end screen grounding bolt 1221 for grounding, the diameter of the end screen grounding bolt 1221 is matched with the diameter of the end screen grounding screw hole B1222, and the diameter of the detection screw hole 1223 is matched with the aperture of the detection bolt 112, the end screen grounding screw hole B1222 can promote the reliable contact of the end screen grounding bolt 1221 with the end screen grounding cover 11 and the end screen leading-out terminal 122 in threaded connection, and the detection screw hole 1223 can promote the fixing function of the threaded connection between the detection bolt 112 and the end screen leading-out terminal 122, whether the bushing end screen is reliably grounded can be judged by detecting the conduction condition between the detection bolt 112 and the ground through a multimeter.
The working principle is as follows: when the device is powered off to carry out an overhaul test on the sleeve, and the end screen grounding cover 11 needs to be opened, firstly, the end screen grounding bolt 1221 needs to be rotated, an indication line is carved on the end screen grounding bolt 1221, when the indication line is rotated to be exposed, the end screen grounding bolt 1221 is separated from the end screen leading-out terminal 122 at the moment, secondly, after the end screen leading-out terminal 122 is screwed out by the rotation detection bolt 112, the end screen grounding cover 11 is opened, relevant inspection and test are carried out on the sleeve end screen, when the end screen grounding bolt 1221 is rotated, in order to prevent the end screen leading-out terminal 122 from rotating along with the bolt to cause end screen wire breakage, the end screen leading-out terminal 122 and the insulating fixing sleeve 121 are fastened together through the positioning bolt 123, after the overhaul, firstly, the end screen grounding cover 11 is rotated, the end screen grounding bolt 1221 is rotated to enable the end screen leading-out terminal 122 to be reliably contacted with the end screen leading-out terminal 122, and at the moment, the end screen is in a grounding state. Next, the detection bolt 112 is screwed in to the fastening degree, since the detection bolt 112 is reliably in contact with the end screen leading-out terminal 122 and there is no electrical connection with the grounding cover. Whether the bushing end screen is reliably grounded or not can be judged by detecting the conduction condition between the detection bolt 112 and the ground through a multimeter, and if the bushing end screen is not reliably grounded, on one hand, the end screen grounding cover 11 can be detached for relevant inspection and timely treatment; if the detection bolt 112 cannot be processed in a short time due to the limitation of field conditions, the detection bolt can be connected with a nearby grounding point through a grounding wire to be used as a temporary grounding point, and the processing can be performed in the next maintenance cycle.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. The utility model provides a last screen ground connection and state detection device for high-pressure oilpaper electric capacity type sleeve pipe, includes equipment main part (1) and visor (2), and visor (2) are installed at equipment main part (1) top and fastener (3), its characterized in that are installed rather than one side: the fastener (3) comprises a sealing gasket (31) arranged at the bottom of the fastener and a fastening bolt (32) connected with the upper end of the fastener.
2. The device as claimed in claim 1, wherein the capacitive bushing comprises: the equipment main body (1) comprises a tail screen grounding cover (11) arranged at the upper end of the equipment main body and a sleeve grounding flange (12) arranged at the bottom of the equipment main body.
3. The device as claimed in claim 2, wherein the capacitive bushing comprises: the end screen grounding cover (11) comprises an isolation cushion block (111) arranged on one side of the outer portion of the end screen grounding cover and a detection bolt (112) connected with the side end of the end screen grounding cover, and a detection cavity (113) formed in the end screen grounding cover (11) is provided with an end screen grounding screw hole A (1131) formed in the upper end of the detection cavity.
4. The device as claimed in claim 2, wherein the capacitive bushing comprises: the sleeve grounding flange (12) comprises an insulating fixing sleeve (121) arranged in the middle of the sleeve grounding flange and an end screen leading-out terminal (122) arranged in the middle of the sleeve grounding flange, and a positioning bolt (123) is further connected between the insulating fixing sleeve (121) and the end screen leading-out terminal (122) in a penetrating mode.
5. The device as claimed in claim 4, wherein the capacitive bushing comprises: the end screen leading-out terminal (122) comprises an end screen grounding screw hole B (1221) formed in the top of the end screen leading-out terminal and an end screen grounding bolt (1222) arranged inside the end screen leading-out terminal, and a detection screw hole (1223) is formed in the side end of the end screen leading-out terminal (122).
6. The device as claimed in claim 5, wherein the capacitive bushing comprises: end screen ground bolt (1221) diameter and end screen ground connection screw B (1222) aperture phase-match, and detect screw (1223) diameter and detect bolt (112) aperture phase-match.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110793710.4A CN113552503A (en) | 2021-07-14 | 2021-07-14 | End screen grounding and state detection device for high-voltage oilpaper capacitive bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110793710.4A CN113552503A (en) | 2021-07-14 | 2021-07-14 | End screen grounding and state detection device for high-voltage oilpaper capacitive bushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113552503A true CN113552503A (en) | 2021-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110793710.4A Pending CN113552503A (en) | 2021-07-14 | 2021-07-14 | End screen grounding and state detection device for high-voltage oilpaper capacitive bushing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113552503A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117612810A (en) * | 2024-01-22 | 2024-02-27 | 搏世因（北京）高压电气有限公司 | Umbrella skirt climbing structure of capacitive sleeve and flange mounting method |
-
2021
- 2021-07-14 CN CN202110793710.4A patent/CN113552503A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117612810A (en) * | 2024-01-22 | 2024-02-27 | 搏世因（北京）高压电气有限公司 | Umbrella skirt climbing structure of capacitive sleeve and flange mounting method |
| CN117612810B (en) * | 2024-01-22 | 2024-04-09 | 搏世因（北京）高压电气有限公司 | Umbrella skirt climbing structure of capacitive sleeve and flange mounting method |
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