Three-phase alternating current capacitor

Abstract

The utility model discloses a three-phase alternating-current capacitor, and the capacitor comprises a housing which is internally provided with an accommodation cavity and is provided with an opening end; the core package assembly is installed in the containing cavity, and the core package assembly is provided with three pin pieces; the cover plate is arranged at one end, close to the open end, of the core package assembly in a covering mode, three pin through holes are formed in the cover plate at intervals, gaps are formed between the three pin through holes and the outer edge of the cover plate, the three pin pieces are arranged in one-to-one correspondence with the three pin through holes, and the three pin pieces penetrate out of the corresponding pin through holes respectively. According to the technical scheme provided by the embodiment of the invention, on one hand, the pin through hole has a displacement restraining effect on the pin piece, the condition that the pin piece is in contact with the shell is prevented, and the potential safety hazard of the capacitor is reduced, and on the other hand, the pin piece of the core package assembly can be conveniently inserted into the cover plate; the condition that pin through holes need to be manually machined in the capacitor assembling process is avoided, and the production efficiency of the capacitor is improved.

Description

Technical Field

[0001] This utility model generally relates to the field of capacitors, and more particularly to three-phase AC capacitors. Background Technology

[0002] Three-phase AC capacitors are reactive power compensation devices used in power systems. They utilize the capacitance properties of capacitors to provide necessary reactive power compensation.

[0003] A three-phase AC capacitor includes a housing, a core assembly, and end caps. The end caps are sealed at the open end of the housing. The core assembly is formed by three cores stacked vertically and is installed inside the housing. The core assembly has three leads, which are connected to the three-phase terminals on the end cap. However, there is a risk that the leads of the core assembly may come into contact with the housing, increasing the safety hazards of the three-phase AC capacitor. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a three-phase AC capacitor.

[0005] This application provides a three-phase AC capacitor, comprising:

[0006] The outer casing has a receiving cavity inside and an open end.

[0007] The core package assembly is installed within a receiving cavity and has three pins.

[0008] A cover plate is placed on one end of the core package assembly near the opening. The cover plate has three pin through holes spaced apart. There is a gap between the three pin through holes and the outer edge of the cover plate. The three pins are arranged one-to-one with the three pin through holes, and the three pins pass through the corresponding pin through holes.

[0009] Furthermore, the cover plate includes an end cap portion and a circumferential sidewall portion connected to the end cap portion. The circumferential sidewall portion is arranged around the outer periphery of the core package assembly. All three pin through holes are located in the end cap portion, and the three pin through holes include two first pin through holes and one second pin through hole.

[0010] Furthermore, the end cap portion is provided with two first baffles on the side away from the core package assembly. The two first baffles are arranged in a one-to-one correspondence with the two first pin through holes. The first baffles are located outside the corresponding first pin through holes and are arranged close to the corresponding first pin through holes.

[0011] Furthermore, the end cap is provided with two second baffles on the side near the core package assembly. The two second baffles are arranged in a one-to-one correspondence with the two first pin through holes. The second baffles are located inside the corresponding first pin through holes and are arranged close to the corresponding first pin through holes.

[0012] Furthermore, the two ends of the second baffle are connected to the circumferential sidewall portion.

[0013] Furthermore, the first pin through-hole is located near the circumferential sidewall.

[0014] Furthermore, the three pin components include two pin bars and one pin wire, with the two pin bars passing through two first pin vias and the pin wire passing through a second pin via.

[0015] Furthermore, the end cap is also provided with multiple oil passage holes.

[0016] Furthermore, the end cap portion has multiple support ribs on the side near the core package assembly, and the multiple support ribs are spaced apart circumferentially along the end cap portion.

[0017] Furthermore, the core package assembly includes a hollow core rod, and a limiting post is provided on the side of the end cap near the core package assembly. The limiting post is located in the middle of the end cap and is inserted into the core rod.

[0018] According to the technical solution provided in the embodiments of this application, a cover plate is provided on the side of the core package assembly near the opening end of the outer shell, and three pin through holes are provided on the cover plate for the three pins to pass through respectively. The three pin through holes are spaced apart from the outer edge of the cover plate. On the one hand, the pin through holes have a displacement constraint effect on the pins, preventing the pins from contacting the outer shell and reducing the safety hazards of the capacitor. On the other hand, it can also facilitate the installation of the pins of the core package assembly on the cover plate, avoiding the need for manual processing of the pin through holes during the capacitor assembly process, and improving the production efficiency of the capacitor. Attached Figure Description

[0019] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the three-phase AC capacitor structure in this embodiment;

[0021] Figure 2 This is a perspective view of the cover plate in this embodiment;

[0022] Figure 3 This is a perspective view of the cover plate in this embodiment from another angle;

[0023] Figure 4 This is a top view of the cover plate in this embodiment;

[0024] Figure 5 This is a bottom view of the cover plate in this embodiment. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Please refer to Figure 1-5 This application provides a three-phase AC capacitor, comprising:

[0028] The outer casing 30 has a receiving cavity inside and an open end;

[0029] Core package assembly 20 is installed in the receiving cavity and has three pins;

[0030] Cover plate 10 is placed on one end of core package assembly 20 near the opening end. Cover plate 10 has three pin through holes spaced apart. There is a gap between the three pin through holes and the outer edge of cover plate 10. The three pins are arranged one-to-one with the three pin through holes. The three pins pass through the corresponding pin through holes.

[0031] In this embodiment, a cover plate 10 is provided on the side of the core package assembly 20 near the opening end of the outer shell 30, and the cover plate 10 has three pin through holes for the three pins to pass through respectively. The three pin through holes are spaced apart from the outer edge of the cover plate 10. On the one hand, the pin through holes have a displacement constraint effect on the pins, so that there is a safe distance between the pins and the outer shell 30, preventing the pins from contacting the outer shell 30 and reducing the safety hazards of the capacitor. On the other hand, it also facilitates the installation of the pins of the core package assembly 20 on the cover plate 10, avoiding the need for manual processing of the pin through holes during the capacitor assembly process, and improving the production efficiency of the capacitor.

[0032] The outer casing 30 has an end cap at the opening end of the sealing cover, and the end cap is provided with a three-phase terminal block. The core package assembly 20 includes three stacked core packages, and the three pins leading out from the core package assembly 20 are respectively connected to the three-phase terminal block after passing through the cover plate 10.

[0033] Preferably, the shape of the pin through-hole is adapted to the shape of the corresponding pin.

[0034] The end cap is made of an insulating material, such as, but not limited to, insulating plastic, such as PP.

[0035] In some embodiments of this application, the cover plate 10 includes an end cap portion 11 and a circumferential sidewall portion 12 connected to the end cap portion 11. The circumferential sidewall portion 12 is disposed around the outer periphery of the core package assembly 20, and the three pin through holes are all located in the end cap portion 11. With this configuration, the circumferential sidewall portion 12 can provide circumferential protection to the end of the core package assembly 20, preventing the end of the core package assembly 20 from contacting the outer shell 30.

[0036] The three pin through-holes include two first pin through-holes 13 and one second pin through-hole 15. The three pin components include two pin strips 21 and one pin wire 22. The two pin components pass through the two first pin through-holes 13 respectively, and the pin wire 22 passes through the second pin through-hole 15. Preferably, the number of second pin through-holes 15 can be multiple and spaced circumferentially along the end cover to meet the needs of three pin components distributed at different positions passing through the cover plate, thereby improving assembly flexibility.

[0037] Preferably, the end cap portion 11 is circular, and the circumferential sidewall portion 12 is annular and disposed on the outer peripheral edge of the end cap portion 11.

[0038] In some embodiments of this application, the end cap 11 has two first baffles 14 on the side opposite to the core package assembly 20. The two first baffles 14 are configured one-to-one with the two first pin through holes 13, with the first baffles 14 located outside the corresponding first pin through hole 13, that is, the first baffles 14 are located on the side of the corresponding first pin through hole 13 closer to the outer casing 30, and the first baffles 14 are positioned close to the corresponding first pin through hole 13. The aforementioned first side plates can increase the insulation protection area between the pins and the outer casing 30, further improving safety performance.

[0039] In some embodiments of this application, the end cap 11 is provided with two second baffles 18 on the side near the core package assembly 20. The two second baffles 18 are correspondingly arranged with the two first pin through holes 13. The second baffles 18 are located inside the corresponding first pin through hole 13, that is, on the side of the corresponding first pin through hole 13 away from the outer casing 30, and are positioned close to the corresponding first pin through hole 13. These second side plates can increase the insulation protection area between the pins and the core package, further improving safety performance.

[0040] In some embodiments of this application, the two ends of the second baffle 18 are connected to the circumferential sidewall portion 12. In this case, the cavity formed between the second baffle 18 and the circumferential sidewall portion 12 constitutes the extension cavity of the first pin through hole 13 along the hole axis direction, so as to increase the limiting and insulation protection of the pin strip 21.

[0041] In some embodiments of this application, the first pin through-hole 13 is disposed near the circumferential sidewall portion 12, which helps to reduce the size of the cover plate 10. Preferably, the first baffle 14 is located on the same surface as the circumferential sidewall portion 12.

[0042] In some embodiments of this application, the end cap 11 is also provided with a plurality of oil passage holes 19, which allow insulating protective oil to pass through so that the insulating protective oil can better fill the area between the cover plate 10 and the core package assembly 20.

[0043] Optionally, the multiple oil passage holes 19 can be evenly spaced along the circumference of the end cap portion 11.

[0044] In some embodiments of this application, the end cap 11 is provided with a plurality of support ribs 16 on the side near the core package assembly 20, and the plurality of support ribs 16 are spaced apart circumferentially along the end cap 11. When the cover plate 10 is placed on the core package assembly 20, the aforementioned support ribs 16 enable an oil flow gap to be formed between the end cap 11 and the end face of the core package assembly 20, so that the insulating protective oil can be better filled between the cover plate 10 and the core package assembly 20.

[0045] Preferably, the plurality of supporting ribs 16 are spaced apart from the middle of the end cap portion 11.

[0046] In some embodiments of this application, the core package assembly 20 includes a hollow core rod with a metallized film wound around its outer periphery. A limiting post 17 is also provided on the side of the end cap portion 11 near the core package assembly 20. The limiting post 17 is located in the middle of the end cap portion 11 and is inserted into the core rod. This arrangement enables the positioning and installation of the core package assembly 20 and the end cap through the insertion and engagement between the limiting post 17 and the core rod, improving the assembly accuracy between the end cap and the core package assembly 20 and preventing large radial displacement of the end cap relative to the core package assembly 20.

[0047] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention; the directional terms "inner" and "outer" refer to the inside or outside relative to the outline of each component itself. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0048] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0049] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A three-phase AC capacitor, characterized in that, include: The outer casing has a receiving cavity inside and an open end; A core package assembly is installed within the receiving cavity, and the core package assembly is provided with three pins; A cover plate is provided on one end of the core package assembly near the opening end. The cover plate has three pin through holes spaced apart, and each of the three pin through holes is spaced apart from the outer edge of the cover plate. The three pins are arranged one-to-one with the three pin through holes, and the three pins respectively protrude from the corresponding pin through holes.

2. The three-phase AC capacitor according to claim 1, characterized in that, The cover plate includes an end cap portion and a circumferential sidewall portion connected to the end cap portion. The circumferential sidewall portion is arranged around the outer periphery of the core package assembly. The three pin through holes are all located in the end cap portion, and the three pin through holes include two first pin through holes and one second pin through hole.

3. The three-phase AC capacitor according to claim 2, characterized in that, The end cap portion is provided with two first baffles on the side away from the core package assembly. The two first baffles are arranged in a one-to-one correspondence with the two first pin through holes. The first baffles are located outside the corresponding first pin through holes and are arranged close to the corresponding first pin through holes.

4. The three-phase AC capacitor according to claim 2, characterized in that, The end cap portion is provided with two second baffles on the side near the core package assembly. The two second baffles are arranged in a one-to-one correspondence with the two first pin through holes. The second baffles are located inside the corresponding first pin through holes and are arranged close to the corresponding first pin through holes.

5. The three-phase AC capacitor according to claim 4, characterized in that, The two ends of the second baffle are connected to the circumferential sidewall portion.

6. The three-phase AC capacitor according to claim 2, characterized in that, The first pin through-hole is located near the circumferential sidewall.

7. The three-phase AC capacitor according to claim 2, characterized in that, The three pin components include two pin bars and one pin wire. The two pin bars pass through the two first pin through holes, and the pin wire passes through the second pin through hole.

8. The three-phase AC capacitor according to claim 2, characterized in that, The end cap is also provided with multiple oil passage holes.

9. The three-phase AC capacitor according to claim 2, characterized in that, The end cap portion is provided with a plurality of support ribs on the side near the core package assembly, and the plurality of support ribs are arranged at intervals along the circumference of the end cap portion.

10. The three-phase AC capacitor according to claim 2, characterized in that, The core package assembly includes a hollow core rod, and a limiting post is provided on the side of the end cap near the core package assembly. The limiting post is located in the middle of the end cap and is inserted into the core rod.

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