CN213815848U - Ultrahigh voltage coaxial thin film capacitor and parallel capacitor device - Google Patents
Ultrahigh voltage coaxial thin film capacitor and parallel capacitor device Download PDFInfo
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Abstract
The utility model relates to a high-energy electric pulse energy storage capacitor technical field especially relates to a coaxial film capacitor of superhigh pressure and parallel capacitive device. The capacitor comprises a conductive shaft core and a capacitor body, wherein a first insulation isolation layer is arranged between the capacitor body and the conductive shaft core, the capacitor body comprises two layers of film substrates, the two layers of film substrates are stacked and wound into a cylindrical shape by taking the conductive shaft core as an axis, a surface is arranged on each of the two layers of film substrates, the two layers of surface conductive layers are arranged in an isolation mode, a positive end face conductive layer and a negative end face conductive layer are arranged on two end faces of the capacitor body respectively, the positive end face conductive layer and the negative end face conductive layer are connected with the two layers of surface conductive layers respectively to form a positive electrode and a negative electrode of the capacitor body, one end of the positive electrode is connected with the conductive shaft core, and one end of the negative electrode is connected with an external electrode. The capacitor is high-pressure resistant and high-temperature resistant, and can realize rapid charge and discharge.
Description
Technical Field
The utility model relates to a high-energy electric pulse energy storage capacitor technical field especially relates to a coaxial film capacitor of superhigh pressure and parallel capacitive device, concretely relates to high-energy electric pulse energy storage equipment for oil gas borehole operation.
Background
In the energy storage device of the underground high-energy electric pulse generator for underground resource development and application, the total energy of the capacitor is U2And x C/2, therefore, the important parameters for restricting the charging time and the pulse energy are voltage and capacitance values, and the inductance of the whole charging and discharging loop also has direct influence on the charging efficiency, the discharging time and the power. More discharge energy and higher power are often needed in practical engineering application, so that two key parameters of capacitance and voltage of an energy storage device need to be chosen correspondingly, and the total inductance of a connecting loop needs to be reduced as much as possible in the manufacturing and series-parallel connection of the modular capacitors. Due to the volume limitation of downhole instruments and the restriction of high-temperature environment, the conventional energy storage capacitor is charged and discharged by selecting larger capacitance and conventional high voltage, the stored electric energy is limited, and the single electric pulse energy is difficult to improve all the time; in a narrow long cylindrical space of an underground instrument, a plurality of capacitors are connected in series and in parallel through a multi-core control cable to improve the total capacitance in the traditional technology, the cables occupy the limited space of an instrument cavity after being arranged, the effective expansion of the volume of an energy storage capacitor is seriously influenced, the inductance of a charging and discharging loop is also seriously increased due to the arrangement of the multi-core cables, and the improvement of the charging and discharging speed and the final power of electric pulses is also limited due to the loss of energy. Due to the defects and the defects of the design and the manufacture technology of the underground energy storage capacitor, the development of the electric pulse technology in underground resources is restrictedThe application range of the surface application also reduces the geological development effect when the technology is applied.
Chinese utility model patent (publication No. CN206163322U, published japanese 20170510) discloses a coaxial capacitor, including the thin film capacitor core of center area through-hole, the thin film capacitor core is equipped with two binding post, and binding post includes the interior wiring terminal and the outer wiring terminal of inside and outside distribution, and interior wiring terminal and outer wiring terminal are connected with the both ends of thin film capacitor core are electrically conductive respectively. Two connecting terminals of the coaxial capacitor are distributed inside and outside, so that parasitic reactance is effectively eliminated. However, the electrode is output on the same side, the shell is anti-interference, a plurality of capacitors cannot be spliced, the output current cannot be increased, and therefore the electrode cannot be used for high-energy pulse discharge in an oil-gas well.
The Chinese invention patent application (publication No. CN109339727A, published Japanese 20190215) discloses a coaxial pulse generator for dredging and increasing production in an oil gas well, which comprises a metal outer cylinder, wherein an energy storage unit, a current-limiting resistance unit, a discharge switch and a discharge electrode are sequentially arranged in the metal outer cylinder, the energy storage unit is coaxially and sequentially connected with a charging unit outside the metal outer cylinder through a multi-core control cable, the energy storage unit realizes charging and discharging control through the multi-core control cable, the energy storage unit comprises a metal elastic sheet and a cylindrical capacitor, the axis of the cylindrical capacitor is an anode, a shell is a cathode, connectors are arranged at two axial ends of the cylindrical capacitor, the connectors are connected with the axis through metal conductors, the cylindrical capacitor is connected end to end through the connectors to realize parallel connection, and the shell is fixedly connected with the inner wall of the metal outer cylinder through the metal elastic sheet. The coaxial design method enables the inductance of the loop to be extremely low, the peak value of the output current can be effectively increased, the output current is improved, and the maximum peak value of the output current is larger than 20 kA.
However, the coaxial pulse generator described above also has the following drawbacks: 1. the single capacitor of the cylindrical capacitor is a parallel capacitor, and the stored energy is limited; 2. the cathode is also required to be connected with the inner wall of the metal outer cylinder through the metal elastic sheet, so that a structure for connecting the metal elastic sheet with the inner wall of the metal outer cylinder is required to be added, the production cost is increased, the connection reliability is also reduced, once the metal outer cylinder is determined, a capacitor cannot be added, and the replacement and increase and decrease of the capacitor are not facilitated; 3. in order to protect the discharge switch, the current-limiting resistance unit is arranged at the rear end of the energy storage unit, so that the discharge current is limited to be unfavorable for improving the discharge power.
Disclosure of Invention
In order to solve the technical problem, the first objective of the present invention is to provide an ultra-high voltage coaxial thin film capacitor, which is high voltage resistant, high temperature resistant, and can realize rapid charging and discharging, and further, by splicing a plurality of capacitors, the distributed inductance loss can be greatly reduced, and then the generation of ultra-high voltage (10 kV-100 kV), high energy and high power electrical pulse is realized in the downhole fluid.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a coaxial film capacitor of superhigh pressure, this coaxial capacitor includes electrically conductive axle core and capacitor body, is provided with first insulation isolation layer between capacitor body and the electrically conductive axle core, the capacitor body include two-layer film base plate, two-layer film base plate range upon range of uses electrically conductive axle core to roll into the tube-shape as the axle center, two-layer film base plate is gone up and is had a surface respectively and be provided with the surface conducting layer, two-layer surface conducting layer mutual isolation sets up to two terminal surfaces at capacitor body are provided with anodal terminal surface conducting layer and negative pole terminal surface conducting layer respectively, anodal terminal surface conducting layer and negative pole terminal surface conducting layer connect two-layer surface conducting layer respectively and constitute capacitor body's positive pole and negative pole, anodal one end with electrically conductive axle core connect, external electrode is connected to negative pole one end.
Preferably, the coaxial capacitor further comprises an outer shell, wherein the outer shell is an insulating outer shell or a conductive outer shell; the conductive shaft core is arranged in the outer shell and coaxially arranged with the outer shell, and the capacitor body is arranged in a cylindrical cavity formed by the conductive shaft core and the outer shell.
Preferably, the conductive outer shell is connected with one end of the negative electrode of the capacitor body, and a second insulating isolation layer is arranged between the conductive outer shell and the capacitor body; the conductive shell is made of a conductive material, or a conductive material layer is arranged on the surface of an insulating material, or a conductive metal wire is arranged on the surface or inside of the insulating material.
Preferably, the insulating material is ceramic or polymer material, and the conductive material layer is made of Al, Cu, Ag, Au, Ni, Mo, Ta, Ti, V, Cr, Fe, Co or graphene.
As a specific implementation mode, the conductive outer shell is a metal outer shell, a metal tray is arranged on the inner circumference of the lower part of the metal outer shell, and the negative electrode end face conductive layer is connected with the metal tray.
Preferably, the first insulating isolation layer is sleeved on the outer side of the conductive shaft core, the upper side end face of the first insulating isolation layer is flush with the end face of the capacitor body, and the positive end face conductive layer extends to the end face of the first insulating isolation layer and is connected with the conductive shaft core.
Preferably, the conductive shaft core is made of ceramic or polymer material of Al, Cu, Ag, Au, Ni, Mo, Ta, Ti, V, Cr, Fe, Co, conductive metal alloy, conductive metal oxide, graphite or surface plated with Al, Cu, Ag, Au, Ni, Mo, Ta, Ti, V, Cr, Fe, Co or graphene.
Preferably, the film substrate is made of one or more of polyethylene, polypropylene, polystyrene, polyester, polycarbonate and polyimide; the surface conducting layer is formed by mixing one or more of Al, Cu, Ag, Au, Ni, Mo, Ta, Ti, V, Cr, Fe, Co, conducting metal alloy, conducting metal oxide, graphite, carbon nano tube, carbon black and graphene.
Preferably, the surface conductive layer is arranged on one side of the surface of the film substrate, and an unmetallized blank is left on the other side of the surface, and the width of the unmetallized blank is 1-20% of the width of the film substrate; preferably 5 to 10%.
Preferably, the positive electrode terminal surface conductive layer and the negative electrode terminal surface conductive layer are one or a mixture of more of Al, Cu, Ag, Au, Ni, Mo, Ta, Ti, V, Cr, Fe, Co, a conductive metal alloy, a conductive metal oxide, graphite, a carbon nanotube, carbon black, and graphene.
Preferably, the coaxial capacitor further comprises an insulating end cap made of insulating varnish or flexible insulating material, the insulating end cap isolating the metal outer shell from the conductive shaft core.
Preferably, the center of the conductive shaft core is provided with a middle hole penetrating through the upper end and the lower end.
Preferably, the upper end and the lower end of the conductive shaft core and the metal shell are respectively provided with a male head and a female head which can be spliced with each other; preferably, the upper end and the lower end of the conductive shaft core are respectively provided with a male head and a female head which are matched with each other, and the upper end and the lower end of the metal shell are respectively provided with a threaded male head and a threaded female head which are matched with each other.
Preferably, the outer end of the thread male head is provided with a packing groove for installing sealing high-pressure fluid, and the inner side of the thread section of the thread female head is provided with a sealing surface.
Furthermore, the utility model also discloses a parallel coaxial capacitor device, which comprises a plurality of capacitors as above, wherein the plurality of capacitors are spliced up and down, and the external electrodes of two capacitors adjacent up and down are connected in series; the conductive shaft cores of the two capacitors are spliced up and down to form a parallel capacitance circuit.
Preferably, the center of the conductive shaft core is provided with a middle hole penetrating through the upper end and the lower end, the middle holes of the capacitors are connected with each other, and a lead wire for controlling discharge is arranged in the middle hole.
Preferably, the upper end and the lower end of the conductive shaft core and the metal shell are respectively provided with a male head and a female head which can be spliced with each other; the metal shell bodies of the two capacitors which are adjacent to each other from top to bottom are spliced with each other through the male heads and the female heads, and the conductive shaft cores of the two capacitors which are adjacent to each other from top to bottom are spliced with each other through the male heads and the female heads.
Preferably, the upper end and the lower end of the conductive shaft core are respectively provided with a male head and a female head which are matched with each other, and the upper end and the lower end of the metal shell are respectively provided with a threaded male head and a threaded female head which are matched with each other. Preferably, the outer end of the thread male head is provided with a packing groove for installing sealing high-pressure fluid, and the inner side of the thread section of the thread female head is provided with a sealing surface.
Furthermore, the utility model also discloses the condenser or the application of parallel coaxial capacitor device in high energy electric pulse energy storage equipment. Preferably, the application is in the cleaning of underground high-voltage pulse discharge pipelines of oil and gas wells and/or in the fracturing of rock formations for stimulation.
The utility model discloses owing to adopted foretell technical scheme, had following advantage:
1. the utility model adopts two layers of film substrates which are stacked and wound into a cylinder shape by taking the conductive shaft core as the axis, and are arranged in the cylindrical cavity formed by the conductive shaft core and the metal shell, thus obtaining the capacitance with smaller capacity under the condition of the smallest volume;
2. when the conductive shaft core is used as the anode, the capacitor metal shell is used as the cathode, and the capacitor is connected with a 50kV ultrahigh-voltage charger, the metallized film winding capacitor sealed in the shell is rapidly charged;
3. when a plurality of capacitors of the utility model are connected in series to form a coaxial parallel capacitor, the total capacitance value of the capacitor can be continuously increased;
4. the utility model discloses the positive and negative two poles of the coaxial capacitor use same electrically conductive axle core and the same metal shell body as binding post, connect between the electric capacity and no longer need other wires and metal contact, greatly reduced the return circuit inductance, compare with the mu H level numerical value of ordinary condenser, the utility model discloses the condenser can be controlled at naheng level, the discharge current peak value can reach more than 100 kA;
5. the utility model can realize the quick splicing of a plurality of capacitors through the male head and the female head, can be used for replacing or increasing or decreasing the capacitors, and further, the discharge wire is controlled through the middle hole in the center of the conductive shaft core, thereby avoiding the leakage of a control pipeline;
6. the utility model discloses every electric capacity is not less than 0.1 mu F after the condenser preparation is accomplished, and is withstand voltage can reach more than 50kV, according to the discharge energy needs during practical application, can concatenate a plurality of formation parallel capacitor uses, when concatenating 20 this condensers, single pulse release energy is close 5000J, and the pulse width can be controlled in several mu S scopes, and instantaneous power can reach GW level.
Drawings
Fig. 1 is a schematic view of the sectional structure of the ultra-high voltage coaxial thin film capacitor of the present invention.
FIG. 2 is a schematic structural diagram of a two-layer film substrate.
Fig. 3 is a schematic sectional view of the parallel coaxial capacitor device of the present invention.
Detailed Description
The following describes in detail embodiments of the present invention with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the ultrahigh voltage coaxial film capacitor includes a metal outer shell 1, a conductive shaft core 2 and a capacitor body 3, wherein the conductive shaft core 2 is disposed inside the metal outer shell 1 by using a thick-walled copper tube and is coaxially disposed with the metal outer shell 1, the capacitor body 3 is cylindrically disposed in a cylindrical cavity formed by the conductive shaft core 2 and the metal outer shell 1, a first insulating isolation layer 4 is disposed between the capacitor body 3 and the conductive shaft core 2, and a second insulating isolation layer 5 is disposed between the capacitor body 3 and the metal outer shell 1; the first insulating isolation layer 4 is sleeved on the outer side of the conductive shaft core 2, the upper side end face of the first insulating isolation layer 4 is flush with the end face of the capacitor body 3, and the positive end face conductive layer 6 extends to the end face of the first insulating isolation layer 4 and is connected with the conductive shaft core 2; the inner circumference of the lower part of the metal shell body 1 is provided with a metal support table 8, and the negative end surface conductive layer 7 is connected with the metal support table 8. And an insulating end cover 9 is arranged at the end part of the coaxial capacitor, the insulating end cover 9 is made of insulating paint or flexible insulating materials, and the insulating end cover 9 isolates the metal outer shell 1 from the conductive shaft core 2.
As shown in fig. 2, the capacitor body 3 includes two thin film substrates 31, the two thin film substrates 31 are stacked and wound in a cylindrical shape with the conductive shaft core 2 as the axis, one surface of each of the two thin film substrates 31 is provided with a surface conductive layer 32, the surface conductive layer 32 is provided on one side of the surface of the thin film substrate 31, and an unmetallized margin is left on the other side of the surface, and the width of the unmetallized margin is 10% of the width of the thin film substrate 31. The two surface conductive layers 32 are arranged in isolation from each other. The film substrate 31 is made of polyester; the surface conductive layer 32 is made of a Cu material, and the film forming method comprises a dry film forming method, a chemical plating method or an electroplating method, wherein the dry film forming method comprises any one of a sputtering method, an ion plating method and an evaporation method; preferably, vapor deposition is used.
As shown in fig. 1, a positive terminal conductive layer 6 and a negative terminal conductive layer 7 are respectively disposed on two end faces of the capacitor body 3, the positive terminal conductive layer 6 and the negative terminal conductive layer 7 are respectively connected to two surface conductive layers 32 to form a positive electrode and a negative electrode of the capacitor body 3, one end of the positive electrode is connected to the conductive shaft core 2, and one end of the negative electrode is connected to the metal outer shell 1. The positive electrode end face conductive layer 6 and the negative electrode end face conductive layer 7 are made of Cu.
As shown in fig. 1, the conductive core 2 has a center hole 10 formed through the upper and lower ends. The upper end and the lower end of the conductive shaft core 2 are respectively provided with a male head 11 and a female head 12 which are matched with each other, and the upper end and the lower end of the metal outer shell 1 are respectively provided with a threaded male head 13 and a threaded female head 14 which are matched with each other. The outer end of the thread male head 13 is provided with a packing groove for installing sealing high-pressure fluid, and the inner side of the thread section of the thread female head 14 is provided with a sealing surface.
Example 2
As shown in fig. 3, a parallel coaxial capacitor device includes a plurality of capacitors shown in embodiment 1, the plurality of capacitors are arranged by being spliced up and down, the metal outer shells 1 of two capacitors adjacent up and down are spliced up and down, and the conductive shaft cores 2 of the two capacitors are spliced up and down to form a parallel capacitive circuit. The metal shell bodies 1 of the two capacitors adjacent to each other are mutually spliced through a male head and a female head, and the conductive shaft cores 2 of the two capacitors adjacent to each other are mutually spliced through the male head and the female head. The outer end of the thread male head 13 is provided with a packing groove for installing sealing high-pressure fluid, and the inner side of the thread section of the thread female head 14 is provided with a sealing surface. And a center hole 10 penetrating the upper and lower ends is formed at the center of the conductive shaft core 2, the center holes 10 of the capacitors are connected with each other, and a lead 15 for controlling discharge is formed in the center hole 10.
The embodiment of the utility model adopts the thick-wall copper pipe as the anode and the metal outer shell of the capacitor as the cathode, and after the capacitor is connected with a 50kV ultrahigh voltage charger, the metallized film winding capacitor sealed in the metal outer shell is rapidly charged; when a plurality of capacitors are connected in series to form a coaxial parallel capacitor, the total capacitance value of the capacitors can be increased continuously; as the same thick-wall copper pipe and the same metal outer shell are used as the connecting terminals for the positive and negative poles of the coaxial capacitor, other wires and metal contacts are not needed for the connection between the capacitors, the loop inductance is greatly reduced, compared with the mu H grade value of a common capacitor, the capacitor can be controlled at the nano-Henry grade, and the discharge current peak value can reach more than 100 kA.
The embodiment of the utility model provides an every electric capacity is not lower in 0.1 mu F after the condenser preparation is accomplished, and is withstand voltage can reach more than 50kV, according to the discharge energy needs during practical application, can concatenate a plurality of formation parallel capacitor uses, when concatenating 20 this condensers, single pulse release energy is close 5000J, and the pulse width can be controlled in several mu S scopes, and instantaneous power can reach GW level.
Therefore, the utility model discloses a parallel coaxial capacitor device in the application of high energy electric pulse energy storage equipment. In particular to the application in the equipment for cleaning the scale of the underground high-voltage pulse discharge pipeline of the oil-gas well and/or increasing the production by fracturing the rock stratum.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention, including any reference to the above-mentioned embodiments. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (21)
1. An ultrahigh-voltage coaxial film capacitor is characterized by comprising a conductive shaft core (2) and a capacitor body (3), wherein a first insulating isolation layer (4) is arranged between the capacitor body (3) and the conductive shaft core (2), the capacitor body (3) comprises two layers of film substrates (31), the two layers of film substrates (31) are stacked and wound into a cylinder by taking the conductive shaft core (2) as an axis, the two layers of film substrates (31) are respectively provided with a surface conductive layer (32), the two layers of surface conductive layers (32) are isolated from each other, two end faces of the capacitor body (3) are respectively provided with a positive end face conductive layer (6) and a negative end face conductive layer (7), the positive end face conductive layer (6) and the negative end face conductive layer (7) are respectively connected with the two layers of surface conductive layers (32) to form a positive electrode and a negative electrode of the capacitor body (3), one end of the positive pole is connected with the conductive shaft core (2), and one end of the negative pole is connected with the external electrode.
2. The ultra-high voltage coaxial film capacitor of claim 1, further comprising an outer shell, wherein the outer shell is an insulating outer shell or a conductive outer shell; the conductive shaft core (2) is arranged in the outer shell (1) and is coaxially arranged with the outer shell (1), and the capacitor body (3) is arranged in a cylindrical cavity formed by the conductive shaft core (2) and the outer shell (1).
3. An ultra-high voltage coaxial film capacitor according to claim 2, wherein the conductive outer shell is connected with one end of the negative electrode of the capacitor body (3), and a second insulating isolation layer (5) is arranged between the conductive outer shell and the capacitor body (3); the conductive shell is made of a conductive material, or a conductive material layer is arranged on the surface of an insulating material, or a conductive metal wire is arranged on the surface or inside of the insulating material.
4. The ultra-high voltage coaxial thin film capacitor of claim 3, wherein the insulating material is ceramic or polymer material, and the conductive material layer is made of Al, Cu, Ag, Au, Ni, Mo, Ta, Ti, V, Cr, Fe, Co or graphene.
5. An ultra-high voltage coaxial film capacitor according to claim 3, wherein the conductive outer shell is a metal outer shell, a metal saddle (8) is arranged on the inner circumference of the lower part of the metal outer shell, and the cathode end face conductive layer (7) is connected with the metal saddle (8).
6. The ultra-high voltage coaxial thin film capacitor as claimed in claim 1, wherein the first insulating isolation layer (4) is sleeved outside the conductive shaft core (2), the upper end face of the first insulating isolation layer (4) is flush with the end face of the capacitor body (3), and the positive end face conductive layer (6) extends to the end face of the first insulating isolation layer (4) and is connected with the conductive shaft core (2).
7. The ultra-high voltage coaxial film capacitor of claim 1, wherein the conductive core (2) is made of ceramic or polymer material of Al, Cu, Ag, Au, Ni, Mo, Ta, Ti, V, Cr, Fe, Co, conductive metal alloy, conductive metal oxide, graphite or surface plated with Al, Cu, Ag, Au, Ni, Mo, Ta, Ti, V, Cr, Fe, Co or graphene.
8. The ultra-high voltage coaxial film capacitor as claimed in claim 1, wherein the film substrate (31) is made of one of polyethylene, polypropylene, polystyrene, polyester, polycarbonate and polyimide; the surface conducting layer (32) is made of one of Al, Cu, Ag, Au, Ni, Mo, Ta, Ti, V, Cr, Fe, Co, conducting metal alloy, conducting metal oxide, graphite, carbon nano tube, carbon black and graphene.
9. An ultra-high voltage coaxial film capacitor according to claim 1, characterized in that the surface conductive layer (32) is arranged on one side of the surface of the film substrate (31) and leaves an unmetallized margin on the other side of the surface, the width of the unmetallized margin being 1-20% of the width of the film substrate (31).
10. An ultra-high voltage coaxial film capacitor according to claim 1, characterized in that the surface conductive layer (32) is arranged on one side of the surface of the film substrate (31) and leaves an unmetallized margin on the other side of the surface, the width of the unmetallized margin being 5-10% of the width of the film substrate (31).
11. The ultra-high voltage coaxial thin film capacitor of claim 1, wherein the positive electrode end face conductive layer (6) and the negative electrode end face conductive layer (7) are made of one of Al, Cu, Ag, Au, Ni, Mo, Ta, Ti, V, Cr, Fe, Co, conductive metal alloy, conductive metal oxide, graphite, carbon nanotube, carbon black, and graphene.
12. An ultra high voltage coaxial film capacitor according to claim 1, further comprising an insulating end cap (9), the insulating end cap (9) being made of insulating varnish or flexible insulating material, the insulating end cap (9) isolating the outer shell (1) from the conductive core (2).
13. An ultra-high voltage coaxial film capacitor according to claim 1, wherein the conductive core (2) is centrally provided with a central hole (10) passing through the upper and lower ends.
14. The ultra-high voltage coaxial film capacitor as claimed in claim 2, wherein the conductive core (2) and the outer shell (1) are provided with a male terminal and a female terminal respectively at the upper and lower ends thereof, which can be spliced with each other.
15. The ultra-high voltage coaxial film capacitor as claimed in claim 14, wherein the conductive core (2) is provided with a male head (11) and a female head (12) at the upper and lower ends thereof, and the outer shell (1) is provided with a threaded male head (13) and a threaded female head (14) at the upper and lower ends thereof.
16. The ultra-high voltage coaxial film capacitor as claimed in claim 15, wherein the outer end of the thread pin (13) is formed with a root groove for installing sealing high pressure fluid, and the inner side of the thread section of the thread box (14) is formed with a sealing surface.
17. A parallel type coaxial capacitor device, characterized in that the device comprises a plurality of capacitors as claimed in any one of claims 1 to 12, the plurality of capacitors are arranged in an upper and lower splicing manner, and the external electrodes of two capacitors adjacent to each other are connected in series; the conductive shaft cores (2) of the two capacitors are spliced up and down to form a parallel capacitor circuit.
18. A parallel coaxial capacitor device according to claim 17, characterized in that the conductive core (2) is centrally provided with a central hole (10) through the upper and lower ends, the central holes (10) of the capacitors being interconnected, the central holes (10) being provided with a discharge controlling lead (15) therein.
19. A parallel coaxial capacitor device according to claim 17, characterized in that the upper and lower ends of the conductive core (2) and the outer housing (1) are provided with a male and a female terminal, respectively, which can be spliced with each other; the shell bodies (1) of the two capacitors which are adjacent up and down are mutually spliced through the male heads and the female heads, and the conductive shaft cores (2) of the two capacitors which are adjacent up and down are mutually spliced through the male heads and the female heads.
20. A parallel coaxial capacitor device according to claim 19, characterized in that the conductive core (2) is provided at its upper and lower ends with a male (11) and a female (12) fitting, respectively, and the outer housing (1) is provided at its upper and lower ends with a male (13) and a female (14) threaded fitting, respectively.
21. A parallel coaxial capacitor device according to claim 20, characterized in that the male part (13) is provided with a groove for receiving a sealing high pressure fluid at its outer end and the female part (14) is provided with a sealing surface at its inner side.
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| CN202021577511.7U CN213815848U (en) | 2020-08-03 | 2020-08-03 | Ultrahigh voltage coaxial thin film capacitor and parallel capacitor device |
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| CN202021577511.7U CN213815848U (en) | 2020-08-03 | 2020-08-03 | Ultrahigh voltage coaxial thin film capacitor and parallel capacitor device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114068181A (en) * | 2020-08-03 | 2022-02-18 | 浙江都美电气技术股份有限公司 | Ultrahigh-voltage coaxial thin-film capacitor, parallel capacitor device and application of ultrahigh-voltage coaxial thin-film capacitor and parallel capacitor device in high-energy electric pulse energy storage equipment |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114068181A (en) * | 2020-08-03 | 2022-02-18 | 浙江都美电气技术股份有限公司 | Ultrahigh-voltage coaxial thin-film capacitor, parallel capacitor device and application of ultrahigh-voltage coaxial thin-film capacitor and parallel capacitor device in high-energy electric pulse energy storage equipment |
| CN114068181B (en) * | 2020-08-03 | 2024-06-04 | 浙江聚能电气科技有限公司 | Ultrahigh-voltage coaxial thin-film capacitor, parallel capacitor device and application thereof |
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