CN114823142B - Vacuum capacitor and processing technology thereof - Google Patents
Vacuum capacitor and processing technology thereof Download PDFInfo
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- CN114823142B CN114823142B CN202210506313.9A CN202210506313A CN114823142B CN 114823142 B CN114823142 B CN 114823142B CN 202210506313 A CN202210506313 A CN 202210506313A CN 114823142 B CN114823142 B CN 114823142B
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- sealing end
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- 239000003990 capacitor Substances 0.000 title claims abstract description 52
- 238000005516 engineering process Methods 0.000 title abstract description 10
- 238000012545 processing Methods 0.000 title abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 78
- 238000001179 sorption measurement Methods 0.000 claims abstract description 18
- 230000017525 heat dissipation Effects 0.000 claims description 94
- 239000007788 liquid Substances 0.000 claims description 47
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 19
- 210000001503 joint Anatomy 0.000 claims description 16
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 13
- 239000001569 carbon dioxide Substances 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 12
- 239000000565 sealant Substances 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 4
- 230000002929 anti-fatigue Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000009516 primary packaging Methods 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 238000012858 packaging process Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/228—Terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/08—Cooling arrangements; Heating arrangements; Ventilating arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/14—Protection against electric or thermal overload
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/224—Housing; Encapsulation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Abstract
The invention discloses a vacuum capacitor and a processing technology thereof, belonging to the field of vacuum capacitors, the vacuum capacitor comprises an insulating cylinder, sealing end covers are fixed on two sides of the insulating cylinder, connecting terminals are connected onto the sealing end covers in a sliding manner, a power-off spring is clamped between the connecting terminals and the sealing end covers, a magnetic column is fixed at the bottom of each connecting terminal, butt-joint columns are fixed on one opposite sides of the two sealing end covers, a central insulating column is clamped between the two butt-joint columns, a mounting ring seat is sleeved on the central insulating column in a sliding manner, electrode ring plates are fixed on the mounting ring seat, the electrode ring plates between the two mounting ring seats are arranged in a staggered manner, a sliding sleeve matched with the butt-joint columns is fixed on the mounting ring seat, an adsorption magnetic ring corresponding to the magnetic column is fixed on the outer side of the sliding sleeve, and a balance air bag is fixed between the two sliding sleeves.
Description
Technical Field
The invention relates to the field of vacuum capacitors, in particular to a vacuum capacitor and a processing technology thereof.
Background
Vacuum capacitors are typically composed of a vacuum-tight enclosure and capacitance generating means of conductive surfaces (electrodes) inside the vacuum-tight enclosure, the interior space is evacuated to very low pressure (typically below 10-6 bara) and kept at low pressure by the vacuum-tight enclosure for the whole life of the device (typically years). The vacuum ensures good electrical insulation between the electrodes and very low dielectric losses of the device.
The vacuum-tight housing is typically made of two conductive rings (which also act as electrical terminals for the device) that are attached to an insulating sheet (typically a cylindrical ceramic sheet) in a vacuum-tight manner. The vacuum capacitor may be fixed (i.e. the capacitance value cannot be adjusted after manufacture), or it may be made as a variable vacuum capacitor in which the capacitance value can be changed, typically by moving one electrode relative to the other by means of a telescopic joint, e.g. bellows. The expansion joint is typically driven by a drive system that also includes an electric motor and some form of control mechanism.
However, the capacitor is easy to explode under the overload condition, has a certain potential safety hazard, and the existing capacitor has poor heat dissipation performance and low service life, so we propose a vacuum capacitor and a processing technology thereof to solve the problems.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems existing in the prior art, the invention aims to provide a vacuum capacitor and a processing technology thereof, which can ensure that two mounting ring seats keep a fixed distance by utilizing a balance air bag in the actual use process, further ensure that the staggered areas of two groups of electrode ring plates are fixed, achieve the purpose of constant capacitance, and when the temperature exceeds a designed safety threshold value, the temperature between the electrode ring plates is increased along with the increase of current, and when the temperature exceeds the designed safety threshold value, the carbon dioxide gas in the heat dissipation bin is heated and expanded, the air pressure in the heat dissipation bin is increased and is larger than the packaging hydraulic pressure of insulating heat dissipation liquid, the air pressure enters the elastic sealing film by releasing Kong Dingkai elastic sealing film to expand the elastic sealing film, thereby reversely extruding insulating liquid, increasing the mutual matching between the mounting ring seats, and the two mounting ring seats by utilizing a balance air bag, further ensuring that the staggered areas of the two groups of electrode ring plates are fixed, achieving the purposes of constant capacitance, and further ensuring that the suction force between the two mounting ring seats is increased along with the magnetic absorption of the magnetic absorption film is increased, and the magnetic absorption force is reduced when the magnetic absorption coefficient is increased, and the current is increased, and when the thermal absorption force between the two mounting ring plates is increased, the magnetic absorption force is increased, and the mutual absorption is increased when the magnetic absorption is increased, and the magnetic force is increased, and the magnetic absorption is increased, and the magnetic is increased, and the thermal is increased, when the thermal is increased, and the thermal is greatly when the thermal is compared, and the thermal absorption is greatly is compared, the invention has the advantages of simple structure, strong heat dissipation, high safety protection, market prospect and suitability for popularization and application.
2. Technical proposal
In order to solve the problems, the invention adopts the following technical scheme.
The vacuum capacitor and the processing technology thereof comprise an insulating cylinder, wherein sealing end covers are fixed on two sides of the insulating cylinder, connecting terminals are connected onto the sealing end covers in a sliding manner, a power-off spring is clamped between the connecting terminals and the sealing end covers, magnetic columns are fixed at the bottoms of the connecting terminals, butt-joint columns are fixed on one sides of the two opposite sealing end covers, a central insulating column is clamped between the two butt-joint columns, a mounting ring seat is sleeved onto the central insulating column in a sliding manner, electrode ring plates are fixed onto the mounting ring seat, the electrode ring plates between the two mounting ring seats are arranged in a staggered manner in a non-contact manner, sliding sleeves matched with the butt-joint columns are fixed onto the mounting ring seat, adsorption magnetic rings corresponding to the magnetic columns are fixed on the outer sides of the sliding sleeves, balance air bags are fixed between the two sliding sleeves, second conductive contacts are fixed on the inner walls of the sliding sleeves, one side of the connecting terminals is provided with a first conductive contact, and conductive sliding rails corresponding to the first conductive contact and the second conductive contact are respectively fixed on the inner and outer walls of the butt-joint columns;
the inner wall of the insulating cylinder is provided with a heat dissipation bin which is of an annular bin body structure, an elastic sealing film is fixed on the annular inner wall of the heat dissipation bin, an expansion cavity is formed between the elastic sealing film and the annular inner wall of the heat dissipation bin, the annular inner wall of the heat dissipation bin is provided with a release hole for communicating the heat dissipation bin with the expansion cavity, and carbon dioxide gas is filled in the heat dissipation bin;
the insulating cylinder and the sealing end covers at two ends of the insulating cylinder form a closed cavity, and saturated insulating heat dissipation liquid is filled in the closed cavity.
The invention uses the mutual matching between the insulating cylinder with the heat dissipation bin, the release hole, the elastic sealing film, the sealing end cover with the butt joint column and the edge buckle, the connecting terminal with the power-off spring, the first conductive contact, the magnetic column, the adsorption magnetic ring, the sliding sleeve, the second conductive contact, the central insulating column and the ring mounting seat of the electrode ring plate, in the actual use process, the two mounting ring seats are lifted by the balance air bag to keep a fixed distance, so that the staggered area of the two groups of electrode ring plates is fixed, the purpose of constant capacitance is achieved, when overload condition occurs in the operation process, the temperature between the electrode ring plates increases along with the increase of current, when the temperature exceeds the designed safety threshold, the carbon dioxide gas in the heat dissipation bin is heated and expands, and when the air pressure in the heat dissipation bin is larger than the packaging hydraulic pressure of the insulating heat dissipation liquid, the air pressure is released Kong Dingkai to the elastic sealing film to expand the elastic sealing film, the insulating heat dissipation liquid is reversely extruded to increase the hydraulic pressure, in the process, the increased insulating heat dissipation liquid hydraulic pressure breaks the pressure balance between the insulating heat dissipation liquid and the balance air bag, the balance air bag contracts to drive the sliding sleeve and the mounting ring seat to be close to each other, the staggered area of the two groups of electrode ring plates is increased to further achieve the aim of increasing the capacitance, the overload phenomenon caused by excessive current is effectively relieved, the overload phenomenon is continuously carried out, the mounting ring seat is mutually close to the minimum distance, when the distance between the adsorption magnetic ring and the magnetic column reaches the critical value, the tension of the power-off spring is larger than the magnetic attraction between the adsorption magnetic ring and the magnetic column, the wiring terminal is far away from the butt joint column to be displaced, the first conductive contact is disconnected, the aim of quick power-off can be realized, the overload explosion of the vacuum capacitor can be effectively prevented under the extreme condition, the invention has the advantages of simple structure, strong heat dissipation, high safety protection, market prospect and suitability for popularization and application.
Further, the two conductive sliding rails are electrically connected, the first conductive contact is electrically connected with the wiring terminal, and the second conductive contact is electrically connected with the electrode coil plate.
Further, the insulating cylinder is ceramic structure, the outer wall of insulating cylinder is equipped with a plurality of radiating grooves, the both ends of insulating cylinder all are equipped with the buckle groove, the avris of end cover is equipped with the edge buckle corresponding with the buckle groove, the clamp has sealed pad and seals fixedly through the sealant between edge buckle and the buckle groove.
Through the mutual cooperation between the sealing end cover with edge buckle and the insulating cylinder with the buckle groove, the sealing end cover can be fast fastened at the two ends of the insulating cylinder, and the inner components such as a central insulating column are preliminarily clamped so that the insulating cylinder is not easy to shake, and the assembly efficiency and convenience are effectively improved.
Further, the insulating heat dissipation liquid is square shed oil, the filling hydraulic pressure of the square shed oil is equal to the filling air pressure of the balance air bag, and the filling hydraulic pressure of the square shed oil is larger than the filling air pressure of carbon dioxide gas in the heat dissipation bin.
Further, the outside of the elastic sealing film is fixed with a sealing convex edge, and the elastic sealing film has elasticity for driving the sealing convex edge to be close to the release hole.
The design of the insulating heat dissipation liquid of square shed oil is adopted, so that the insulating strength can be improved, the erosion of moisture can be avoided, the heat generated during the operation of the vacuum capacitor enables the insulating heat dissipation liquid of the electrode coil plate to expand upwards due to heating, the heat is dissipated through the heat dissipation groove of the insulating cylinder through up-down convection of the insulating heat dissipation liquid, and the normal operation of the vacuum capacitor is ensured.
Further, the de-energized spring is a high strength anti-fatigue spring having a tension force that urges the first conductive contact of the terminal away from the mating post.
Further, the magnetism of the magnetic column is opposite to that of the adsorption magnetic ring, when the two mounting ring seats are separated by the maximum distance, the magnetic attraction between the magnetic column and the adsorption magnetic ring is maximum, and the maximum magnetic attraction is larger than the pulling force of the power-off spring.
Further, the electrode coil plate is of a copper plate structure, the electrode coil plate is spirally wound, insulating paper is coated on the outer side of the electrode coil plate, and the coating thickness of the insulating paper is half of the thickness of the electrode coil plate.
Through the structural design of the insulating paper coated on the outer side of the electrode coil plate, on one hand, the phenomenon of short circuit caused by contact of two groups of electrode coil plates can be effectively avoided, and on the other hand, the capacitance of the vacuum capacitor can be effectively increased.
The processing technology of the vacuum capacitor specifically comprises the following steps:
s1, spirally winding an electrode ring plate, fixing the electrode ring plate on one side of a mounting ring seat, and sleeving a sliding sleeve of the mounting ring seat on a butt column of a sealing end cover for later use;
s2, placing the sealing end cover, the mounting ring seat and the insulating cylinder assembled in the step S1 in insulating heat dissipation liquid and keeping a submerged state, in the state, inserting a central insulating column between butt-joint columns of the sealing end cover, clamping a balance air bag between sliding sleeves of the mounting ring seat, gradually butt-jointing the sealing end cover on two sides of the insulating cylinder, and completing primary packaging;
s3, keeping the vacuum capacitor preliminarily packaged in the step S2 immersed in the insulating heat dissipation liquid, discharging air in the insulating heat dissipation liquid by utilizing a vacuum machine, performing sealant sealing operation on the edge buckle and the buckle groove, and taking out the vacuum capacitor;
and S4, adding carbon dioxide gas into a heat dissipation bin of the vacuum capacitor through a pressurizing device, and then plugging the gas inlet to obtain the vacuum capacitor.
Further, in step S, the sealant is of a waterproof insulating UV-gel structure, and the sealant is cured by light irradiation in an insulating heat dissipation liquid through an external UV lamp.
The process method provided by the invention can effectively remove the air in the packaged insulating heat dissipation liquid, adopts the curing direction of irradiating the UV lamp in the insulating heat dissipation liquid, can effectively avoid secondary air entering in the packaging process, further improves the air tightness, is simple to operate, has a simple preparation process, has market prospect, and is suitable for popularization and application.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) The scheme is that an insulating cylinder with a heat dissipation bin, a release hole, an elastic sealing film, a sealing end cover with a butt joint column and an edge buckle, a power-off spring, a first conductive contact, a connecting terminal of a magnetic column, an adsorption magnetic ring, a sliding sleeve, a second conductive contact, a central insulating column and a ring mounting seat of an electrode ring plate are mutually matched, in the actual use process, two mounting ring seats are lifted by a balance air bag to keep a fixed distance, the staggered areas of two groups of electrode ring plates are fixed, the purpose of constant capacitance is achieved, when overload condition occurs in the operation process, the temperature between the electrode ring plates increases along with the increase of current, when the temperature exceeds a designed safety threshold, carbon dioxide gas in the heat dissipation bin is heated and expands, and when the air pressure in the heat dissipation bin is larger than the packaging hydraulic pressure of insulating heat dissipation liquid, the air pressure is released Kong Dingkai to the elastic sealing film to expand the elastic sealing film, the insulating heat dissipation liquid is reversely extruded to increase the hydraulic pressure, in the process, the increased insulating heat dissipation liquid hydraulic pressure breaks the pressure balance between the insulating heat dissipation liquid and the balance air bag, the balance air bag contracts to drive the sliding sleeve and the mounting ring seat to be close to each other, the staggered area of the two groups of electrode ring plates is increased to further achieve the aim of increasing the capacitance, the overload phenomenon caused by excessive current is effectively relieved, the overload phenomenon is continuously carried out, the mounting ring seat is mutually close to the minimum distance, when the distance between the adsorption magnetic ring and the magnetic column reaches the critical value, the tension of the power-off spring is larger than the magnetic attraction between the adsorption magnetic ring and the magnetic column, the wiring terminal is far away from the butt joint column to be displaced, the first conductive contact is disconnected, the aim of quick power-off can be realized, the overload explosion of the vacuum capacitor can be effectively prevented under the extreme condition, the invention has the advantages of simple structure, strong heat dissipation, high safety protection, market prospect and suitability for popularization and application.
(2) Through the mutual cooperation between the sealing end cover with edge buckle and the insulating cylinder with the buckle groove, the sealing end cover can be fast fastened at the two ends of the insulating cylinder, and the inner components such as a central insulating column are preliminarily clamped so that the insulating cylinder is not easy to shake, and the assembly efficiency and convenience are effectively improved.
(3) The design of the insulating heat dissipation liquid of square shed oil is adopted, so that the insulating strength can be improved, the erosion of moisture can be avoided, the heat generated during the operation of the vacuum capacitor enables the insulating heat dissipation liquid of the electrode coil plate to expand upwards due to heating, the heat is dissipated through the heat dissipation groove of the insulating cylinder through up-down convection of the insulating heat dissipation liquid, and the normal operation of the vacuum capacitor is ensured.
(4) Through the structural design of the insulating paper coated on the outer side of the electrode coil plate, on one hand, the phenomenon of short circuit caused by contact of two groups of electrode coil plates can be effectively avoided, and on the other hand, the capacitance of the vacuum capacitor can be effectively increased.
(5) The process method provided by the invention can effectively remove the air in the packaged insulating heat dissipation liquid, adopts the curing direction of irradiating the UV lamp in the insulating heat dissipation liquid, can effectively avoid secondary air entering in the packaging process, further improves the air tightness, is simple to operate, has a simple preparation process, has market prospect, and is suitable for popularization and application.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is an enlarged schematic view of the portion A in FIG. 2;
FIG. 4 is an enlarged schematic view of the portion B in FIG. 2;
FIG. 5 is a schematic diagram of an exploded construction of the present invention;
FIG. 6 is a schematic view of an explosion structure of a seal end cap according to the present invention;
FIG. 7 is a schematic view of the mounting ring and electrode plate according to the present invention;
FIG. 8 is a schematic cross-sectional view of an insulation cylinder according to the present invention;
FIG. 9 is a schematic diagram of a conventional capacitor according to the present invention;
FIG. 10 is a schematic diagram of the structure of the invention when the capacitor is increased under heat.
The reference numerals in the figures illustrate:
the insulating cylinder 1, the heat dissipation groove 11, the heat dissipation bin 12, the release hole 13, the elastic sealing film 14, the blocking convex edge 141, the buckling groove 15, the sealing end cover 2, the butt joint column 21, the edge buckling 22, the wiring terminal 3, the power-off spring 31, the first conductive contact 32, the magnetic column 33, the mounting ring seat 4, the adsorption magnetic ring 41, the sliding sleeve 42, the second conductive contact 43, the central insulating column 5, the electrode ring plate 6 and the balance air bag 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present invention are within the protection scope of the present invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1:
referring to fig. 1-10, a vacuum capacitor and a processing technology thereof, the vacuum capacitor comprises an insulating cylinder 1, wherein sealing end covers 2 are fixed on two sides of the insulating cylinder 1, a connecting terminal 3 is connected on the sealing end covers 2 in a sliding way, a power-off spring 31 is clamped between the connecting terminal 3 and the sealing end covers 2, a magnetic column 33 is fixed at the bottom of the connecting terminal 3, a butt joint column 21 is fixed on one side opposite to the two sealing end covers 2, a central insulating column 5 is clamped between the two butt joint columns 21, a mounting ring seat 4 is sleeved on the central insulating column 5 in a sliding way, electrode ring plates 6 are fixed on the mounting ring seat 4, electrode ring plates 6 between the two mounting ring seats 4 are arranged in a staggered way and are not in contact, sliding sleeves 42 matched with the butt joint column 21 are fixed on the mounting ring seat 4, an adsorption magnetic ring 41 corresponding to the magnetic column 33 is fixed on the outer side of the sliding sleeve 42, a balance air bag 7 is fixed between the two sliding sleeves 42, a second conductive contact 43 is fixed on the inner wall of the sliding sleeve 42, a first conductive contact 32 is arranged on one side of the connecting terminal 3, a conductive rail corresponding to the first conductive contact 32 and a conductive contact 43 is fixed on the inner and the outer wall of the butt joint column 21 respectively;
the inner wall of the insulating cylinder 1 is provided with a heat dissipation bin 12, the heat dissipation bin 12 is of an annular bin body structure, an elastic sealing film 14 is fixed on the annular inner wall of the heat dissipation bin 12, an expansion cavity is formed between the elastic sealing film 14 and the annular inner wall of the heat dissipation bin 12, the annular inner wall of the heat dissipation bin 12 is provided with a release hole 13 which is communicated with the heat dissipation bin 12 and the expansion cavity, and carbon dioxide gas is filled in the heat dissipation bin 12;
the insulating cylinder 1 and the sealing end covers 2 at the two ends of the insulating cylinder form a closed cavity, and saturated insulating heat dissipation liquid is filled in the closed cavity.
The invention uses the mutual matching of the insulating cylinder 1 with the heat dissipation bin 12, the release hole 13, the elastic sealing film 14 and the plugging convex edge 141, the sealing end cover 2 with the butt joint column 21 and the edge buckle 22, the wiring terminal 3 with the power-off spring 31, the first conductive contact 32 and the magnetic column 33, the absorption magnetic ring 41, the sliding sleeve 42, the second conductive contact 43, the central insulating column 5 and the ring mounting seat 4 of the electrode ring plate 6, in the actual use process, the balance air bag 7 is utilized to lift the two mounting ring seats 4 to keep a fixed distance, thereby fixing the staggered area of the two groups of electrode ring plates 6, achieving the purpose of constant capacitance, when the overload condition occurs in the operation process, the temperature between the electrode ring plates 6 increases along with the increase of current, when the temperature exceeds the designed safety threshold, the carbon dioxide gas in the heat dissipation bin 12 is heated and swells, and the air pressure in the heat dissipation bin 12 increases, when the pressure is larger than the packaging pressure of the insulating heat dissipation liquid, the air pressure pushes the elastic sealing film 14 through the release hole 13 to enter the elastic sealing film 14, so that the elastic sealing film 14 expands, the insulating heat dissipation liquid is reversely extruded, the hydraulic pressure is increased, in the process, the increased insulating heat dissipation liquid hydraulic pressure breaks the pressure balance between the insulating heat dissipation liquid and the balance air bag 7, the balance air bag 7 contracts, the sliding sleeve 42 and the mounting ring seat 4 are driven to approach each other, the staggered area of the two groups of electrode ring plates 6 is increased, the aim of increasing capacitance is further achieved, the overload phenomenon caused by excessive current is effectively relieved, the overload phenomenon is continuously carried out, the mounting ring seat 4 approaches to the minimum distance, when the distance between the adsorption magnetic ring 41 and the magnetic column 33 reaches a critical value, the tension of the power-off spring 31 is larger than the magnetic attraction between the adsorption magnetic ring 41 and the magnetic column 33, and the wiring terminal 3 is far away from the contact column 21 at the moment, so that the first conductive contact 32 is disconnected, the invention has the advantages of simple structure, strong heat dissipation, high safety protection, market prospect and suitability for popularization and application.
The two conductive sliding rails are electrically connected, the first conductive contact 32 is electrically connected with the wiring terminal 3, the second conductive contact 43 is electrically connected with the electrode coil plate 6, the insulating cylinder 1 is of a ceramic structure, the outer wall of the insulating cylinder 1 is provided with a plurality of heat dissipation grooves 11, both ends of the insulating cylinder 1 are respectively provided with a clamping groove 15, the side of the sealing end cover 2 is provided with an edge clamping buckle 22 corresponding to the clamping groove 15, and a sealing gasket is clamped between the edge clamping buckle 22 and the clamping groove 15 and is sealed and fixed through sealing glue.
Through the mutual cooperation between the sealed end cover 2 with the edge buckle 22 and the insulating cylinder 1 with the buckle groove 15, the sealed end cover 2 can be fast buckled at the two ends of the insulating cylinder 1, and the internal components such as the central insulating column 5 are preliminarily clamped so as to enable the insulating cylinder not to shake easily, so that the assembly efficiency and convenience are effectively improved.
The insulating heat dissipation liquid is square shed oil, the filling hydraulic pressure of the square shed oil is equal to the filling air pressure of the balance air bag 7, the filling hydraulic pressure of the square shed oil is larger than the filling air pressure of carbon dioxide gas in the heat dissipation bin 12, the outer side of the elastic sealing film 14 is fixedly provided with a sealing convex edge 141, and the elastic sealing film 14 has elastic force for driving the sealing convex edge 141 to be close to the release hole 13.
The design of the insulating heat dissipation liquid of square shed oil is adopted, so that the insulating strength can be improved, the erosion of moisture can be avoided, the heat generated during the operation of the vacuum capacitor can enable the insulating heat dissipation liquid of the electrode coil plate 6 to expand upwards due to heating, the heat is dissipated through the heat dissipation groove 11 of the insulating cylinder 1 through up-down convection of the insulating heat dissipation liquid, and the normal operation of the vacuum capacitor is ensured.
The outage spring 31 is a high-strength anti-fatigue spring, the outage spring 31 is provided with a pulling force for driving the first conductive contact 32 of the connecting terminal 3 to be far away from the butt joint column 21, the magnetism of the magnetic column 33 is opposite to that of the adsorption magnetic ring 41, when the two mounting ring seats 4 are at the maximum distance, the magnetic attraction between the magnetic column 33 and the adsorption magnetic ring 41 is maximum, the maximum magnetic attraction is larger than the pulling force of the outage spring 31 at the moment, the electrode coil plate 6 is spirally wound, insulating paper is coated on the outer side of the electrode coil plate 6, and the coating thickness of the insulating paper is one half of the thickness of the electrode coil plate 6. Through the structural design of the insulating paper coated on the outer side of the electrode ring plate 6, on one hand, the phenomenon of short circuit caused by contact of the two groups of electrode ring plates 6 can be effectively avoided, and on the other hand, the capacitance of the vacuum capacitor can be effectively increased.
The processing technology of the vacuum capacitor specifically comprises the following steps:
s1, spirally winding and fixing an electrode ring plate 6 on one side of a mounting ring seat 4, and sleeving a sliding sleeve 42 of the mounting ring seat 4 on a butt joint column 21 of a sealing end cover 2 for later use;
s2, placing the sealing end cover 2, the mounting ring seat 4 and the insulating cylinder 1 assembled in the step S1 in insulating heat dissipation liquid and keeping a submerged state, in this state, inserting a central insulating column 5 between the butt-joint columns 21 of the sealing end cover 2, inserting a balance air bag 7 between the sliding sleeves 42 of the mounting ring seat 4, gradually closing the sealing end cover 2 on two sides of the insulating cylinder 1, and completing primary packaging;
s3, keeping the vacuum capacitor preliminarily packaged in the step S2 immersed in the insulating heat dissipation liquid, discharging air in the insulating heat dissipation liquid by utilizing a vacuum machine, performing sealant sealing operation on the edge buckle 22 and the buckle groove 15, and taking out the vacuum capacitor; the sealant is of a waterproof insulating UV glue structure, and is subjected to illumination curing in insulating heat dissipation liquid through an external UV lamp;
and S4, adding carbon dioxide gas into the heat dissipation bin 12 of the vacuum capacitor through a pressurizing device, and then plugging the gas inlet to obtain the vacuum capacitor.
The process method provided by the invention can effectively remove the air in the packaged insulating heat dissipation liquid, adopts the curing direction of irradiating the UV lamp in the insulating heat dissipation liquid, can effectively avoid secondary air entering in the packaging process, further improves the air tightness, is simple to operate, has a simple preparation process, has market prospect, and is suitable for popularization and application.
The above description is only of the preferred embodiments of the present invention; the scope of the invention is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present invention, and the technical solution and the improvement thereof are all covered by the protection scope of the present invention.
Claims (8)
1. Vacuum capacitor, comprising an insulating cylinder (1), characterized in that: the utility model discloses a high-voltage power supply, including insulating cylinder (1), sealing end cap (2) are fixed with both sides, sliding connection has binding post (3) on sealing end cap (2), the clamp has outage spring (31) between binding post (3) and sealing end cap (2), the bottom of binding post (3) is fixed with magnetic pole (33), two opposite one side of sealing end cap (2) all is fixed with butt joint post (21), two the clamp has central insulating post (5) between butt joint post (21), install ring seat (4) have been cup jointed in the slip on central insulating post (5), all be fixed with electrode circle board (6) on installing ring seat (4), two electrode circle board (6) between installing ring seat (4) are crisscross non-contact setting, be fixed with on installing ring seat (4) with butt joint post (21) assorted sliding sleeve (42), the outside of sliding sleeve (42) be fixed with corresponding absorption magnetic ring (41) of magnetic pole (33), two be fixed with balanced (7) between sliding sleeve (42), second inner wall (42) inner wall (32) conductive contact (32) fixed on one side respectively A conductive slide rail corresponding to the second conductive contact (43);
the inner wall of the insulating cylinder (1) is provided with a heat dissipation bin (12), the heat dissipation bin (12) is of an annular bin body structure, an elastic sealing film (14) is fixed on the annular inner wall of the heat dissipation bin (12), an expansion cavity is formed between the elastic sealing film (14) and the annular inner wall of the heat dissipation bin (12), a release hole (13) for communicating the heat dissipation bin (12) with the expansion cavity is formed in the annular inner wall of the heat dissipation bin (12), and carbon dioxide gas is filled in the heat dissipation bin (12);
the insulating cylinder (1) and sealing end covers (2) at two ends of the insulating cylinder form a closed cavity, and saturated insulating heat dissipation liquid is filled in the closed cavity;
the power-off spring (31) is a high-strength anti-fatigue spring, and the power-off spring (31) has a pulling force for driving the first conductive contact (32) of the wiring terminal (3) to be far away from the butt-joint column (21);
when the magnetism of the magnetic column (33) is opposite to that of the adsorption magnetic ring (41) and the two mounting ring seats (4) are at the maximum distance, the magnetic attraction between the magnetic column (33) and the adsorption magnetic ring (41) is maximum, and the maximum magnetic attraction is larger than the pulling force of the power-off spring (31).
2. A vacuum capacitor as claimed in claim 1, wherein: the two conductive sliding rails are electrically connected, the first conductive contact (32) is electrically connected with the wiring terminal (3), and the second conductive contact (43) is electrically connected with the electrode coil plate (6).
3. A vacuum capacitor as claimed in claim 1, wherein: the insulating cylinder (1) is of a ceramic structure, a plurality of radiating grooves (11) are formed in the outer wall of the insulating cylinder (1), buckling grooves (15) are formed in the two ends of the insulating cylinder (1), edge buckles (22) corresponding to the buckling grooves (15) are arranged on the side of the sealing end cover (2), and sealing gaskets are clamped between the edge buckles (22) and the buckling grooves (15) and are sealed and fixed through sealing glue.
4. A vacuum capacitor as claimed in claim 1, wherein: the insulating heat dissipation liquid is square shed oil, the filling hydraulic pressure of the square shed oil is equal to the filling air pressure of the balance air bag (7), and the filling hydraulic pressure of the square shed oil is larger than the filling air pressure of carbon dioxide gas in the heat dissipation bin (12).
5. A vacuum capacitor as claimed in claim 1, wherein: the outside of elastic sealing film (14) is fixed with shutoff protruding edge (141), elastic sealing film (14) have the elasticity that drives shutoff protruding edge (141) to be close to release hole (13).
6. A vacuum capacitor as claimed in claim 1, wherein: the electrode coil plate (6) is of a copper plate structure, the electrode coil plate (6) is spirally wound, insulating paper is coated on the outer side of the electrode coil plate (6), and the coating thickness of the insulating paper is half of the thickness of the electrode coil plate (6).
7. The process for manufacturing a vacuum capacitor according to claim 1, wherein: the method specifically comprises the following steps:
s1, spirally winding and fixing an electrode ring plate (6) on one side of a mounting ring seat (4), and sleeving a sliding sleeve (42) of the mounting ring seat (4) on a butt joint column (21) of a sealing end cover (2) for later use;
s2, placing the sealing end cover (2), the mounting ring seat (4) and the insulating cylinder (1) assembled in the step S1 in insulating heat dissipation liquid and keeping a submerged state, in the state, inserting a central insulating column (5) between butt-joint columns (21) of the sealing end cover (2), inserting a balance air bag (7) between sliding sleeves (42) of the mounting ring seat (4), gradually closing the sealing end cover (2) on two sides of the insulating cylinder (1), and completing primary packaging;
s3, keeping the vacuum capacitor preliminarily packaged in the step S2 immersed in the insulating heat dissipation liquid, discharging air in the insulating heat dissipation liquid by utilizing a vacuum machine, performing sealant sealing operation on the edge buckle (22) and the buckle groove (15), and taking out the vacuum capacitor;
and S4, adding carbon dioxide gas into a heat dissipation bin (12) of the vacuum capacitor through a pressurizing device, and then plugging the gas inlet to obtain the vacuum capacitor.
8. The process for manufacturing a vacuum capacitor according to claim 7, wherein: in step S3, the sealant is of a waterproof insulating UV-gel structure, and the sealant is cured by light irradiation in an insulating heat dissipation liquid through an external UV lamp.
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| CN202210506313.9A CN114823142B (en) | 2022-05-11 | 2022-05-11 | Vacuum capacitor and processing technology thereof |
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| CN202210506313.9A CN114823142B (en) | 2022-05-11 | 2022-05-11 | Vacuum capacitor and processing technology thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0757975A (en) * | 1993-08-12 | 1995-03-03 | Meidensha Corp | Vacuum capacitor |
| JP2010135441A (en) * | 2008-12-02 | 2010-06-17 | Meidensha Corp | Vacuum capacitor |
| CN105190804A (en) * | 2013-03-19 | 2015-12-23 | 康姆艾德公司 | High-voltage capacitor |
| CN109524237A (en) * | 2018-12-05 | 2019-03-26 | 郑素英 | A kind of pressurization improves the capacitor device of the anti-insulation breakdown of field distribution |
| CN113517136A (en) * | 2021-09-13 | 2021-10-19 | 南通道奇家纺有限公司 | Capacitor for electric control equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9019043B2 (en) * | 2011-12-20 | 2015-04-28 | Schaffner Emv Ag | Feed through EMC filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0757975A (en) * | 1993-08-12 | 1995-03-03 | Meidensha Corp | Vacuum capacitor |
| JP2010135441A (en) * | 2008-12-02 | 2010-06-17 | Meidensha Corp | Vacuum capacitor |
| CN105190804A (en) * | 2013-03-19 | 2015-12-23 | 康姆艾德公司 | High-voltage capacitor |
| CN109524237A (en) * | 2018-12-05 | 2019-03-26 | 郑素英 | A kind of pressurization improves the capacitor device of the anti-insulation breakdown of field distribution |
| CN113517136A (en) * | 2021-09-13 | 2021-10-19 | 南通道奇家纺有限公司 | Capacitor for electric control equipment |
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