CN114465150A - Three-phase common-box insulator assembly and GIS - Google Patents
Three-phase common-box insulator assembly and GIS Download PDFInfo
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- CN114465150A CN114465150A CN202111547909.5A CN202111547909A CN114465150A CN 114465150 A CN114465150 A CN 114465150A CN 202111547909 A CN202111547909 A CN 202111547909A CN 114465150 A CN114465150 A CN 114465150A
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- 239000012212 insulator Substances 0.000 title claims abstract description 96
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0358—Connections to in or out conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0352—Gas-insulated switchgear for three phase switchgear
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0356—Mounting of monitoring devices, e.g. current transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/065—Means for detecting or reacting to mechanical or electrical defects
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/075—Earthing arrangements
Abstract
The invention relates to a three-phase common-box insulator assembly and a GIS (gas insulated switchgear). The three-phase common-box insulator assembly comprises three-phase central inserts arranged in a shape like a Chinese character 'pin', flanges and insulating parts arranged between the central inserts and the flanges, electrodes are integrally poured in the insulating parts corresponding to the central inserts, the electrodes and the corresponding central inserts are arranged in a radial corresponding mode, each electrode comprises an arc-shaped part corresponding to the central inserts and extending along the circumferential direction of the insulating part, the three-phase common-box insulator assembly further comprises a connecting part, the connecting part is positioned on one side, back to the central inserts, of the arc-shaped part, and radial through holes are formed in the flanges corresponding to the connecting parts; the connecting part is used for connecting with a live display wiring body penetrating into the radial through hole when the live condition is monitored so as to enable the electrode to be communicated with the live display device; the connecting part is also used for being connected with a grounding piece penetrating into the radial through hole during grounding shielding, and the flange is provided with a grounding piece connecting part used for being connected with the grounding piece.
Description
Technical Field
The invention relates to a three-phase common-box insulator assembly and a GIS (gas insulated switchgear), in particular to an embedded electrode in an insulator.
Background
In the prior art, in order to accurately reflect and detect the electrification condition of a main loop in a GIS, an electrified display device is mostly adopted for detection. The electrified display device utilizes the electric field coupling between a high-voltage electric field and a sensor to perform induction type test outside a safe distance, outputs a locking signal, implements forced locking on an operating mechanism and the like, prevents misoperation, and plays a vital role in ensuring personal safety and equipment safety.
At present, an electrified display probe for the GIS is usually arranged on a cover plate to detect the electrified condition of a product, and particularly, a pulling opening is formed in a cylinder body of the GIS and the cover plate is arranged, so that the design scheme is complex in structure and high in cost. There are also a few manufacturers that form a detection hole in the bus-bar basin insulator and assemble a charged display electrode (in a ball shape) in the detection hole to detect a charged display signal, for example, in an insulator assembly disclosed in chinese document with application publication No. CN112712942A and a high voltage switchgear using the same, the ball-shaped charged display electrode is embedded in the insulator.
The problem that the prior art exists is that the surface area of the ball-head-shaped charged display electrode facing the central conductor is small, so that the charged signal of the bus conductor is difficult to detect, and the accuracy of detecting the charged signal is poor.
In order to solve the problem of the bulb-shaped charged display electrode, an arc-shaped mesh-shaped induction electrode is directly cast inside a three-wire common-box insulator in the embedded high-voltage charged display device disclosed in chinese patent document No. CN202453418U, and three-phase induction electrodes are respectively cast near three-phase conductors.
However, in the case of a three-phase common-box insulator, an annular ground shield ring is usually embedded in an insulating portion between a flange and a three-phase conductor arranged in a zigzag shape, so as to reduce the electric field intensity at the flange and reduce partial discharge of the insulator. However, after the live display electrode is poured into the insulator, the grounding shield ring cannot be normally installed. However, when the product is actually used, not all insulators do not need to be subjected to charged display monitoring, and for the insulator which does not need to be subjected to charged display monitoring, if a three-phase common-box insulator with a charged display electrode pre-installed in the insulator is adopted, the electric field intensity at the flange is large due to the fact that a grounding shielding ring cannot be installed, the local discharge phenomenon of the insulator is serious, and the service life of the insulator is shortened. In order to meet different use conditions, two three-phase common-box insulators need to be equipped, the universality is poor, and the design and processing cost is high.
Disclosure of Invention
The invention aims to provide a three-phase common-box insulator assembly, which aims to solve the technical problem that in the prior art, two three-phase common-box insulators are required to be equipped to meet different use working conditions, so that the design and processing cost is high. The invention aims to provide a GIS.
In order to achieve the purpose, the technical scheme of the three-phase common-box insulator assembly is as follows:
the three-phase common-box insulator assembly comprises three-phase common-box insulators, wherein each three-phase common-box insulator comprises three-phase central inserts which are distributed in a shape like a Chinese character 'pin', a flange and an insulating part arranged between the central inserts and the flange, electrodes are integrally cast in the insulating parts corresponding to the central inserts, the electrodes and the corresponding central inserts are arranged in a radial corresponding mode, each electrode comprises an arc-shaped part which corresponds to the central inserts and extends along the circumferential direction of the insulating part, the three-phase common-box insulator assembly also comprises a connecting part, the connecting part is positioned on one side of the arc-shaped part, which is opposite to the central inserts, and radial through holes are formed in the flange corresponding to the connecting parts; the connecting part is used for connecting with a live display wiring body penetrating into the radial through hole when the live condition is monitored so as to enable the electrode to be communicated with the live display device; the connecting part is also used for being connected with a grounding piece penetrating into the radial through hole during grounding shielding, and the flange is provided with a grounding piece connecting part used for being connected with the grounding piece.
The beneficial effects are that: in the three-phase common-box insulator assembly, the position, corresponding to the three-phase central insert, in the insulating part is cast with the electrode, and the arc-shaped part of the electrode corresponds to the central insert and extends along the circumferential direction of the insulating part, so that the area of the arc-shaped part facing the central conductor is larger, and the electrode can accurately and sensitively acquire the electrified signal of the central conductor. When the three-phase common-box insulator assembly is used for monitoring the electrified condition, the connecting part of the electrode is communicated with an electrified display device through an electrified display wiring body, and then the electrified display device monitors the electrified condition of a central conductor of the GIS; when the three-phase common-box insulator assembly is not used for monitoring the electrified condition, the connecting part of the electrode is connected with the flange through the grounding piece and grounded, so that the arc-shaped part of the electrode replaces a grounding shielding ring, the partial discharge generated in the running process of the insulator is inhibited, the service life of the insulator is prolonged, and thus, the three-phase common-box insulator assembly can be suitable for two different use working conditions of electrified display monitoring and grounding shielding, has stronger universality, does not need to design and process two insulators, and has lower cost.
In a further improvement, the three-phase common-box insulator assembly further comprises an insulating sleeve, the insulating sleeve is at least arranged in the radial through hole in a penetrating mode when the electrified condition is monitored, and the electrified display wiring body penetrates through the insulating sleeve.
The beneficial effects are that: design like this, through insulating cover with electrified demonstration wiring body and flange insulation isolation, puncture the clearance between electrified demonstration wiring body and the radial through-hole when preventing that the electrode is electrified for electrode and ground connection flange electrically conductive intercommunication, and the electrified condition of unable monitoring electrode.
The improved three-phase common-box insulator assembly comprises the electrified display wiring body, wherein a threaded hole is formed in the connecting part, the electrified display wiring body comprises a wiring bolt matched with the threaded hole, and a lead wire used for being connected with an electrified display device is arranged on the wiring bolt.
The beneficial effects are that: design like this, realize electrified display device and coupling part intercommunication through the terminal bolt, and then can monitor the electrified situation of electrode through electrified display device, terminal bolt's simple structure, be convenient for installation and dismantlement.
The three-phase common-box insulator assembly further comprises a joint which is hermetically fixed on the peripheral surface of the flange, the joint is provided with a threading channel for leading wires to pass through, the threading channel comprises a penetrating port for leading wires to penetrate in and a penetrating port for leading wires to penetrate out, the penetrating port is communicated with the radial through hole of the flange, and the threading channel is an L-shaped channel.
The beneficial effects are that: by the design, the joint sealing cover is arranged at the orifice of the radial through hole, so that rainwater in the external environment is prevented from directly entering the radial through hole.
The grounding piece connecting part is a threaded hole arranged at the hole opening of the radial through hole, and the grounding piece is used for being screwed on the threaded hole.
The beneficial effects are that: the hole of the radial through hole is provided with the threaded hole to form the grounding piece connecting part, so that the grounding piece can be conveniently disassembled and assembled, and the structure is simple.
In a further improvement, the three-phase common-box insulator assembly further comprises the grounding piece, and the grounding piece comprises a conductive plug and a conductive spring, wherein the conductive plug is rotatably installed on the threaded hole, and the conductive spring is pressed between the conductive plug and the connecting part.
The beneficial effects are that: by the design, the conductive spring ensures reliable contact between the conductive plug and the connecting part, and the conductive plug prevents external rainwater and sundries from entering.
In a further improvement, the conductive plugs are arranged flush with the outer peripheral surface of the flange or embedded in the threaded holes.
The beneficial effects are that: the design like this, simple structure, it needs to increase the electrically conductive end cap of extra structure closing cap to avoid electrically conductive end cap to stretch out flange periphery face to prevent electrically conductive end cap and other object electrically conduct and threaten personal safety. And moreover, the conductive plug does not extend out of the flange, so that point discharge is avoided.
Further improved, the three-phase common-box insulator assembly further comprises waterproof glue which is smeared on the peripheral surface of the flange to seal the conductive plug.
The beneficial effects are that: design like this, seal the electrically conductive end cap through the waterproof glue in order completely cut off the steam in the external environment, simple structure, the realization of being convenient for.
In a further improvement, the arc-shaped part is of a circular arc rod-shaped structure.
The beneficial effects are that: by the design, the arc-shaped structure part is regular in shape and convenient to process.
In order to achieve the purpose, the technical scheme of the GIS is as follows:
the GIS comprises a shell and an insulator assembly, wherein a three-phase central conductor is arranged in the shell, a three-phase common-box insulator assembly is installed in the shell and comprises three-phase common-box insulators, the three-phase common-box insulators comprise three-phase central inserts which are distributed in a shape like a Chinese character 'pin', flanges and insulating parts arranged between the central inserts and the flanges, the three-phase central conductors are connected with the three-phase central inserts which are distributed in the shape like the Chinese character 'pin' one by one, the shell is connected with the flanges, electrodes are integrally poured in the insulating parts corresponding to the central inserts, the electrodes and the corresponding central inserts are arranged in a radially corresponding mode, each electrode comprises an arc-shaped part which corresponds to the central inserts and extends along the circumferential direction of the insulating part, and a connecting part is positioned on one side of the arc-shaped part, which faces away from the central inserts, and radial through holes are formed in the flanges corresponding to the connecting parts; the connecting part is used for connecting with a live display wiring body penetrating into the radial through hole when the live condition is monitored so as to enable the electrode to be communicated with the live display device; the connecting part is also used for being connected with a grounding piece penetrating into the radial through hole during grounding shielding, and the flange is provided with a grounding piece connecting part used for being connected with the grounding piece.
The beneficial effects are that: in the GIS, the position, corresponding to the three-phase central insert, in the insulating part is cast with the electrode, and the arc part of the electrode corresponds to the central insert and extends along the circumferential direction of the insulating part, so that the area of the arc part facing the central conductor is larger, and the electrode can more accurately and sensitively collect the electrified signal of the central conductor. When the three-phase common-box insulator assembly is used for monitoring the electrified condition, the connecting part of the electrode is communicated with an electrified display device through an electrified display wiring body, and then the electrified display device monitors the electrified condition of a central conductor of the GIS; when the three-phase common-box insulator assembly is not used for monitoring the electrified condition, the connecting part of the electrode is connected with the flange through the grounding piece and grounded, so that the arc-shaped part of the electrode replaces a grounding shielding ring, the partial discharge generated in the running process of the insulator is inhibited, the service life of the insulator is prolonged, and thus, the three-phase common-box insulator assembly can be suitable for two different use working conditions of electrified display monitoring and grounding shielding, has stronger universality, does not need to design and process two insulators, and has lower cost.
In a further improvement, the three-phase common-box insulator assembly further comprises an insulating sleeve, the insulating sleeve is at least arranged in the radial through hole in a penetrating mode when the electrified condition is monitored, and the electrified display wiring body penetrates through the insulating sleeve.
The beneficial effects are that: design like this, through insulating cover with electrified demonstration wiring body and flange insulation isolation, puncture the clearance between electrified demonstration wiring body and the radial through-hole when preventing that the electrode is electrified for electrode and ground connection flange electrically conductive intercommunication, and the electrified condition of unable monitoring electrode.
Further improve, the three-phase is total to be case insulator subassembly includes the electrified wiring body that shows, be equipped with the screw hole on the connecting portion, the electrified wiring body that shows includes with screw hole complex binding bolt, is equipped with the lead wire that is used for linking to each other with electrified display device on the binding bolt.
The beneficial effects are that: design like this, realize electrified display device and coupling part intercommunication through the terminal bolt, and then can monitor the electrified situation of electrode through electrified display device, terminal bolt's simple structure, be convenient for installation and dismantlement.
In a further improvement, the three-phase common-box insulator assembly further comprises a joint which is hermetically fixed on the peripheral surface of the flange, the joint is provided with a threading channel for the lead to pass through, the threading channel comprises a penetration hole for the lead to penetrate in and a penetration hole for the lead to penetrate out, the penetration hole is communicated with the radial through hole of the flange, and the threading channel is an L-shaped channel.
The beneficial effects are that: by the design, the joint sealing cover is arranged at the orifice of the radial through hole, so that rainwater in the external environment is prevented from directly entering the radial through hole.
The grounding piece connecting part is a threaded hole arranged at the hole opening of the radial through hole, and the grounding piece is used for being screwed on the threaded hole.
The beneficial effects are that: the hole of the radial through hole is provided with the threaded hole to form the grounding piece connecting part, so that the grounding piece can be conveniently disassembled and assembled, and the structure is simple.
In a further improvement, the three-phase common-box insulator assembly further comprises the grounding piece, and the grounding piece comprises a conductive plug and a conductive spring, wherein the conductive plug is rotatably installed on the threaded hole, and the conductive spring is pressed between the conductive plug and the connecting part.
The beneficial effects are that: by the design, the conductive spring ensures reliable contact between the conductive plug and the connecting part, and the conductive plug prevents external rainwater and sundries from entering.
In a further improvement, the conductive plug is arranged flush with the outer peripheral surface of the flange or embedded in the threaded hole.
The beneficial effects are that: the design like this, simple structure, it needs to increase the electrically conductive end cap of extra structure closing cap to avoid electrically conductive end cap to stretch out flange periphery face to prevent electrically conductive end cap and other object electrically conduct and threaten personal safety. And moreover, the conductive plug does not extend out of the flange, so that point discharge is avoided.
Further improved, the three-phase common-box insulator assembly further comprises waterproof glue which is smeared on the peripheral surface of the flange to seal the conductive plug.
The beneficial effects are that: design like this, seal the electrically conductive end cap through the waterproof glue in order completely cut off the steam in the external environment, simple structure, the realization of being convenient for.
In a further improvement, the arc-shaped part is of a circular arc rod-shaped structure.
The beneficial effects are that: due to the design, the shape of the arc-shaped structure part is regular, and the arc-shaped structure part is convenient to process.
Drawings
FIG. 1 is a schematic view of a GIS in accordance with the present invention in partial configuration (wherein three phase insulator assemblies are used to detect live conditions);
FIG. 2 is a schematic view of the insulator assembly of FIG. 1 for detecting a live condition;
FIG. 3 is a schematic diagram of the electrode of FIG. 2;
FIG. 4 is a sectional view taken along line H-H of FIG. 2;
fig. 5 is a schematic structural view of the insulator assembly of fig. 1 when used for ground shielding;
FIG. 6 is a cross-sectional view A-A of FIG. 5;
in the figure: 11. a center conductor; 12. a housing; 13. a central insert; 14. an insulating section; 15. a flange; 16. an electrode; 17. a joint; 18. a threading channel; 19. a wiring bolt; 20. a ground member connecting portion; 21. an insulating sleeve; 22. a lead wire; 23. an arcuate portion; 24. a connecting portion; 25. a conductive plug; 26. a conductive spring; 27. and (3) waterproof glue.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, which may be present, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrases "comprising an … …," or the like, do not exclude the presence of such elements, processes, or methods.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
Embodiment 1 of GIS of the invention:
as shown in fig. 1 and fig. 2, the GIS includes a housing 12 and a three-phase common-box insulator assembly, a three-phase central conductor 11 is disposed in the housing 12, the three-phase common-box insulator assembly includes a three-phase common-box insulator, the three-phase common-box insulator is a disc insulator, the three-phase common-box insulator includes a three-phase central insert 13 arranged in a zigzag manner, a flange 15 and an insulating portion 14 disposed between the central insert 13 and the flange 15, the three-phase central conductors 11 are respectively connected with the three-phase central insert 13 in a one-to-one correspondence manner, and the housing 12 is connected with the flange 15. An electrode 16 is cast into the insulating part 14 for each central insert 13, the electrode 16 being arranged radially corresponding to the respective central insert 13.
In this embodiment, as shown in fig. 2 to 4, the electrode 16 includes a connection portion 24 and an arc portion 23 corresponding to the center insert 13 in the radial direction and extending along the circumferential direction of the insulating portion 14, the connection portion 24 is located on a side of the arc portion 23 facing away from the center insert 13, the connection portion 24 is provided with a threaded hole extending along the radial direction of the insulating portion 14, the flange 15 is provided with a radial through hole corresponding to each connection portion 24 of the electrode 16, the radial through hole penetrates the flange 15 along the radial direction of the flange 15, an outer side hole of the radial through hole is provided with a ground connection portion 20, and the ground connection portion 20 is a threaded hole provided at the hole of the radial through hole. In this embodiment, the arc portion 23 has a circular arc rod-like structure. In other embodiments, the arcuate portion 23 is a sheet-like structure or a mesh-like structure extending circumferentially along the insulation 14.
The three-phase common-box insulator assembly is suitable for the use working condition of the charged condition needing to be monitored and is also suitable for the application working condition of the charged condition needing not to be monitored.
As shown in fig. 2 to 4, when the three-phase common-box insulator assembly is used for monitoring a charged condition, the three-phase common-box insulator assembly further includes a terminal bolt 19 and a joint 17 sealingly fixed on an outer circumferential surface of the flange 15, specifically, the joint 17 is fixed on the outer circumferential surface of the flange 15 by a bolt. Be equipped with the lead wire 22 that is used for linking to each other with electrified display device on the head of binding bolt 19, connect 17 to be provided with threely, three joint 17 all has the threading passageway 18 that supplies lead wire 22 to pass, threading passageway 18 is L type passageway, threading passageway 18 is including supplying the mouth of penetrating that lead wire 22 penetrated and the through-out mouth that supplies lead wire 22 to wear out, and the through-out mouth communicates with the radial through-hole of flange 15, and the through-out mouth is towards ground to avoid the rainwater to pass through-out mouth entering electrode 16. An insulating sleeve 21 penetrates through the radial through hole, and a wiring bolt 19 penetrates through the insulating sleeve 21 and is matched with a threaded hole of the connecting part 24 so as to communicate the electrified display device with the electrode 16, so that the electrified condition of the central conductor 11 in the GIS can be monitored. Here, since the connecting portion 24 of the electrode 16 does not extend to the position of the radial edge of the insulating portion 14, one end of the insulating sleeve 21 projects into the insulating portion 14 and abuts on the electrode 16, and the other end of the insulating sleeve 21 projects from the outer peripheral surface of the flange 15. In the present embodiment, the terminal bolt 19 constitutes an electrified display terminal body connected to the electrode 16 to connect an electrified display device.
In this embodiment, as shown in fig. 5 and 6, when the three-phase common-box insulator assembly only functions to support and connect the central conductor 11 without monitoring the live display condition, the problem of partial discharge of the three-phase common-box insulator needs to be considered. Specifically, the three-phase common-box insulator assembly comprises a grounding piece, wherein the grounding piece comprises a conductive plug 25 which is screwed in the connecting part 20 of the grounding piece and a conductive spring 26 which is pressed between the conductive plug 25 and the connecting part 24, the conductive plug 25 and the conductive spring 26 are communicated with an electrode 16 and a grounded flange 15, so that an arc-shaped part 23 of the electrode 16 can replace a grounding shielding ring in a traditional mode, the electric field intensity at the flange 15 is reduced, and the partial discharge of an insulating part 14 is reduced. Moreover, the conductive plug 25 is flush with the outer peripheral surface of the flange 15, and a waterproof adhesive 27 for sealing the conductive plug 25 is applied to the outer peripheral surface of the flange 15 to prevent moisture in the external environment from entering the electrode 16. In other embodiments, the conductive plug 25 is embedded in the ground connection portion 20, i.e., the radially outer end surface of the conductive plug 25 is located in the ground connection portion 20.
When the three-phase common-box insulator assembly is used for monitoring the electrified condition, firstly, the insulating sleeves 21 are arranged in the three radial through holes of the flange 15 in a penetrating mode, then the three joints 17 are fixed on the outer peripheral surface of the flange 15 in a sealing mode respectively, the penetrating port of each joint 17 is communicated with the corresponding radial through hole, the wiring bolt 19 with the lead 22 penetrates through the penetrating port of each joint 17, penetrates through the penetrating port 18 and then penetrates into the insulating sleeve 21 to be matched with the threaded hole of the wiring portion, the electrified display monitoring device and the electrode 16 are communicated, and the electrified condition is monitored.
When the three-phase common-box insulator assembly does not need to monitor the conductive display condition, the conductive spring 26 is firstly arranged in the radial through hole of the flange 15, the conductive plug 25 is screwed in the grounding part connecting part 20 and is pressed on the conductive spring 26, and finally, waterproof glue 27 is coated on the outer peripheral surface of the flange 15 to seal the conductive plug 25. Thus, when the GIS is in operation, the electrode 16 is connected to the grounded flange 15 through the conductive plug 25 and the conductive spring 26, and the arc-shaped portion 23 replaces the grounded shielding ring in the conventional manner, so that the electric field intensity at the flange 15 is reduced, and the partial discharge of the insulating portion 14 is reduced.
In the GIS, the position, corresponding to the three-phase central insert, in the insulating part is cast with the electrode, and the arc part of the electrode corresponds to the central insert and extends along the circumferential direction of the insulating part, so that the area of the arc part facing the central conductor is larger, and the electrode can more accurately and sensitively collect the electrified signal of the central conductor. When the three-phase common-box insulator assembly is used for monitoring the electrified condition, the connecting part of the electrode is communicated with an electrified display device through an electrified display wiring body, and then the electrified display device monitors the electrified condition of a central conductor of the GIS; when the three-phase common-box insulator assembly is not used for monitoring the electrified condition, the connecting part of the electrode is connected with the flange through the grounding piece and grounded, so that the arc-shaped part of the electrode replaces a grounding shielding ring, the partial discharge generated in the running process of the insulator is inhibited, the service life of the insulator is prolonged, and thus, the three-phase common-box insulator assembly can be suitable for two different use working conditions of electrified display monitoring and grounding shielding, has stronger universality, does not need to design and process two insulators, and has lower cost.
It should be noted that in the present embodiment, the terminal bolt 19, the insulating sheath 21, the lead wire 22, and the connector 17 are components required for monitoring the live display condition, and the conductive plug 25, the conductive spring 26, and the waterproof adhesive 27 are components required for ground shielding. When the device is delivered from a factory, corresponding parts are configured according to the requirements of customers, or when the device is delivered from a factory, the two parts are not configured, and a user can be configured on site according to the requirements.
It should be noted that the three-phase common-box insulator assembly in the present embodiment includes a disc insulator, and actually, the structure of the present embodiment is also applicable to a basin-type insulator.
It should be noted that the insulating sleeve 21 in the present embodiment is inserted into not only the radial through hole but also the insulating portion 14, and the insulating sleeve 21 may be inserted only into the radial through hole in actual assembly.
Embodiment 2 of GIS of the present invention:
this example differs from example 1 in that: in embodiment 1, the connection portion 24 is provided with a threaded hole, the live display wiring body includes a wiring bolt 19 fitted into the threaded hole, and the wiring bolt 19 is provided with a lead 22 for connecting to the live display device. In this embodiment, the connection portion is provided with a light hole, the live display wiring body includes a polish rod, the polish rod passes through the radial through hole on the flange to be matched with the light hole of the connection portion, and a lead wire for connecting with the live display device is arranged at one end of the polish rod away from the central insert. In other embodiments, the threaded holes on the connecting parts are eliminated, when the live display condition needs to be monitored, the insulating seat is fixed on the outer peripheral surface of the flange, the metal insert is installed in the insulating seat and connected with the live display device, and the conductive spring is pressed between the metal insert which is arranged in the radial through hole and the connecting parts and is communicated with the live display device through the conductive spring and the metal insert. At this time, in order to prevent the discharge phenomenon between the conductive spring and the hole wall of the radial through hole, an insulating sleeve is also installed in the radial through hole. At this time, although the connection portion is not provided with the screw hole or the optical hole, it is possible to achieve conductive communication with the outside through the end surface thereof.
Embodiment 3 of GIS of the present invention:
this example differs from example 1 in that: in embodiment 1, the joint 17 has a threading passage 18 through which the lead wire 22 passes, the threading passage 18 includes a penetration port through which the lead wire 22 passes and a penetration port through which the lead wire 22 passes, the penetration port communicates with the radial through hole of the flange 15, and the threading passage 18 is an L-shaped passage. In this embodiment, the joint has a linear threading passage, and the threading opening of the threading passage are positioned on the same straight line. In other embodiments, the joint is eliminated and, in order to prevent the terminal bolt from being exposed, an insulating resin may be poured at the terminal bolt for protection.
Embodiment 4 of GIS of the present invention:
this example differs from example 1 in that: in embodiment 1, the grounding member connecting portion 20 is a threaded hole at the radial through hole, and the grounding member is screwed into the threaded hole. In this embodiment, the optical aperture of the radial through hole forms a grounding member connecting portion, and the grounding member is in interference fit with the optical aperture. In other embodiments, the connecting portion of the grounding member is a threaded hole formed in the outer peripheral surface of the flange, and in this case, the grounding member includes a connection bolt threadedly connected to the connecting portion, and the connection bolt is connected to the threaded hole through a wire to achieve grounding.
Embodiment 5 of GIS of the present invention:
this example differs from example 1 in that: in embodiment 1, the grounding member includes a conductive plug 25 fitted into the threaded hole and a conductive spring 26 press-fitted between the conductive plug 25 and the connecting portion 24. In this embodiment, the grounding member includes a conductive plug portion engaged with the threaded hole and a conductive rod engaged with the connection portion, and the conductive rod may directly penetrate into the threaded hole of the connection portion or may be in contact with the end surface of the connection portion to achieve conductive communication.
Embodiment 6 of GIS of the present invention:
this example differs from example 1 in that: in example 1, a waterproof adhesive 27 is applied to the outer circumferential surface of the flange 15 to close the conductive plugs 25. In this embodiment, a cover plate is fixed on the outer circumferential surface of the flange in a sealing manner to close the conductive plug.
Embodiment 7 of GIS of the invention:
this example differs from example 1 in that: in embodiment 1, the conductive plug 25 is disposed flush with the outer peripheral surface of the flange 15. In this embodiment, the conductive plug extends out of the outer peripheral surface of the flange, and at this time, a sealing cover needs to be fixed on the outer peripheral surface of the flange in a sealing manner to seal the conductive plug, so as to prevent an object in an external environment from being conductively communicated with the conductive plug.
An embodiment of the three-phase common-box insulator assembly of the present invention: the structure of this three-phase common-box insulator assembly is the same as that of the three-phase common-box insulator assembly of any one of embodiments 1 to 7 of the GIS described above, and will not be described in detail here.
Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The three-phase common-box insulator assembly comprises three-phase common-box insulators, wherein the three-phase common-box insulators comprise three-phase central inserts (13) which are distributed in a shape like a Chinese character pin, flanges (15) and insulating parts (14) which are arranged between the central inserts (13) and the flanges (15), electrodes (16) are poured in the insulating parts (14) corresponding to the central inserts (13), and the electrodes (16) and the corresponding central inserts (13) are arranged in a radial corresponding mode; the connecting part (24) is used for being connected with a live display wiring body penetrating into the radial through hole when the live condition is monitored, so that the electrode (16) is communicated with a live display device; the connecting part (24) is also used for being connected with a grounding piece penetrating into the radial through hole during grounding shielding, and a grounding piece connecting part (20) used for being connected with the grounding piece is arranged on the flange (15).
2. The three-phase common-box insulator assembly according to claim 1, further comprising an insulating sleeve (21), wherein the insulating sleeve (21) is at least penetrated in the radial through hole when the electrified condition is monitored, and the electrified display wiring body is penetrated in the insulating sleeve (21).
3. The three-phase common-box insulator assembly according to claim 2, wherein the three-phase common-box insulator assembly further comprises the live display wiring body, the connecting portion (24) is provided with a threaded hole, the live display wiring body comprises a wiring bolt (19) matched with the threaded hole, and the wiring bolt (19) is provided with a lead wire (22) used for being connected with a live display device.
4. The three-phase common-box insulator assembly according to claim 3, further comprising a joint (17) hermetically fixed on the outer periphery of the flange (15), wherein the joint (17) is provided with a threading channel (18) for the lead wire (22) to pass through, the threading channel (18) comprises a penetrating hole for the lead wire (22) to penetrate in and a penetrating hole for the lead wire (22) to penetrate out, the penetrating hole is communicated with the radial through hole of the flange (15), and the threading channel (18) is an L-shaped channel.
5. A three-phase common-box insulator assembly according to any one of claims 1 to 4, characterized in that the grounding member connection portion (20) is a threaded hole provided at the radial through hole aperture, the grounding member being adapted to be screwed onto the threaded hole.
6. The three-phase common-box insulator assembly according to claim 5, further comprising the grounding member, wherein the grounding member comprises a conductive plug (25) screwed on the threaded hole and a conductive spring (26) pressed between the conductive plug (25) and the connecting portion (24).
7. The three-phase common-box insulator assembly according to claim 6, characterized in that the conductive plugs (25) are arranged flush with the outer peripheral surface of the flange (15) or are embedded in the threaded holes.
8. The three-phase common-box insulator assembly according to claim 7, further comprising a waterproof glue (27) applied to the outer circumference of the flange (15) to close the conductive plugs (25).
9. A three-phase common-box insulator assembly according to any one of claims 1 to 4, characterized in that the arc-shaped portion (23) is of a circular arc rod-like configuration.
GIS comprising a housing (12), in which housing (12) a three-phase centre conductor (11) is arranged, characterized in that a three-phase common-box insulation subassembly according to any one of claims 1 to 9 is mounted on the housing (12), that the three-phase centre conductor (11) is connected to a three-phase centre insert (13) arranged in a zigzag pattern in the three-phase common-box insulation subassembly in a one-to-one correspondence, and that the housing (12) is connected to a flange (15) of the three-phase common-box insulation subassembly.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111547909.5A CN114465150B (en) | 2021-12-16 | 2021-12-16 | Three-phase common-box insulator assembly and GIS |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111547909.5A CN114465150B (en) | 2021-12-16 | 2021-12-16 | Three-phase common-box insulator assembly and GIS |
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| CN114465150B CN114465150B (en) | 2024-03-29 |
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Also Published As
| Publication number | Publication date |
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| CN114465150B (en) | 2024-03-29 |
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