CN220672399U - Self-breaking power capacitor - Google Patents

Abstract

The utility model discloses a self-breaking power capacitor, which comprises a shell, a cover plate, an external connection end and a safety component, wherein an opening is formed in the shell, the cover plate is covered at the opening of the shell, a grounding port and an external port are formed in the cover plate, the external connection end is arranged in the external port of the cover plate in a penetrating way, the external connection end is provided with three, the safety component comprises copper columns and copper sheets, one end of each copper column is connected with the external connection end and is arranged on one side of the interior of the shell, the other end of each copper column is in spot welding connection with the copper sheets, and the copper sheets are arranged in the interior of the shell. The self-breaking type power capacitor is simple and reliable in structure, and can realize breaking protection rapidly and effectively when the capacitor generates conventional faults, so that safety accidents are avoided.

Description

Self-breaking power capacitor

Technical Field

The application relates to the field of power capacitors, in particular to a self-breaking power capacitor.

Background

The power capacitor is a capacitor used for a power system and electrical equipment, is an important component of a reactive compensation device, is also a self-healing low-voltage parallel capacitor, is mainly used for improving the power factor of a power grid, reducing line loss and improving voltage quality, and is a novel power-saving product recommended by China. The self-healing low-voltage parallel capacitor mostly adopts metallized polypropylene material as medium, has the characteristics of small volume, light weight, low loss, small heating, long working life, good energy-saving effect and excellent self-healing performance, and is internally provided with a self-discharging resistor and a safety component, and the self-discharging resistor can automatically discharge the electric energy carried on the capacitor; when the capacitor breaks down, the safety component can timely disconnect the power supply, so that further development of the fault is avoided, and the use safety is ensured.

When common faults such as oil leakage, high Wen Gubao, breakdown and aging occur in the self-healing low-voltage parallel capacitor in the related technology, the self-healing low-voltage parallel capacitor can lead to a large amount of gas generated by an internal metallized film, so that the pressure of the gas in the container is increased, the container shell bulges, and then overvoltage and stretch-break protection is triggered, and the power supply is cut off. The common overvoltage and stretch-break protection adopts soldering connection protection, the soldering is easy to have the problems of undercut and corrosion, tin agent slag inclusion and the like, the welding joint is weak in strength and weak, cracks and drops easily, when the pressure in the shell is increased, the soldered part cannot be broken in time, and the stretch-break effect is poor; the other mode adopts wire connection, and when the power-off protection is started, the connection between the wire and the copper sheet is difficult to disconnect, so that the situation that the power supply cannot be cut off occurs, and safety accidents are easy to cause.

Disclosure of Invention

The embodiment of the application provides a self-breaking power capacitor, which has a simple and reliable connection structure, and can quickly and effectively realize breaking protection when the capacitor generates a conventional fault, so that safety accidents are avoided.

The embodiment of the application provides a self-breaking power capacitor, which comprises: the shell is provided with an opening, the cover plate is covered at the opening of the shell, the cover plate is provided with a grounding port and an external port, the external end is arranged in the external port of the cover plate in a penetrating mode, the external end is provided with three copper columns and copper sheets, one end of each copper column is connected with one side of the external end, which is arranged in the shell, of each copper column, the other end of each copper column is in spot welding connection with the copper sheets, and the copper sheets are arranged in the shell.

The technical scheme in the embodiment of the application has at least the following technical effects: after the assembly is completed, the cover plate is covered to separate the inside of the shell from the outside, and in the use process, the cover plate is not opened, and the internal circuit is connected to the copper column and the external terminal through the copper sheet, so that the internal circuit is connected with the outside. When the capacitor breaks down, the internal pressure of the shell is increased, the shell is deformed, the cover plate bulges through air pressure, the spot welding position between the copper column and the copper sheet is quickly separated, and the power supply is timely disconnected. The mode of adopting copper sheet and copper post spot welding has guaranteed that normal state is stable can not drop, and in time break off when the trouble, and spot welding still has and need not other consumptive materials, relies on copper sheet and copper post itself to accomplish, and energy saving labour saving and time saving, advantage that the cost is lower. Therefore, the utility model has the advantages of stable connection position, difficult falling off, simple and clear connection operation, timely breaking and good breaking effect.

Further, be equipped with the insulating seat, the insulating seat is connected on the apron, and is placed in the casing outside, and external end is arranged in the casing outside one side and is run through the insulating seat, and has the clearance between external end side and the external interface, through this setting, apron and casing are electrified when preventing to switch on, influence power capacitor's use.

Further, be equipped with the limiting plate on the outer end, the limiting plate is located outer one side of casing is arranged in to the outer end, and limiting plate butt insulation seat terminal surface opening part through this setting, prevents that the outer end from exposing in outside small, is difficult for carrying out external work.

Further, the insurance subassembly includes insulating box, insulating box connects on the apron to it is inside to put in the casing, is equipped with the copper post hole that is used for passing the copper post on the insulating box, through this setting, ensures that the condenser core is only connected with the copper sheet circuit.

Further, be equipped with the copper sheet groove on the one side that corresponds the copper post hole on the insulating box, copper sheet groove and copper post hole quantity, position correspond, are equipped with the screw hole in the copper sheet groove, and every copper sheet groove corresponds to be equipped with two or more screw holes, and the copper sheet groove is located the surface department of insulating box, and copper sheet cooperation screw hole is connected in the copper sheet inslot, through this setting, the copper sheet position of being convenient for location, fixed.

Further, be equipped with the spacing inslot is inlayed to the copper post on the copper sheet, copper post and copper sheet spot welding are connected in spacing inslot department, through this setting, the copper post of being convenient for is connected with the copper sheet and is fixed a position.

Further, the external terminal is arranged on one side of the inside of the shell and is provided with an insulating block, a lock nut is arranged between the insulating block and the end face of one side of the inside of the shell, the external terminal penetrates through the insulating block and is in clearance with the external interface, and through the arrangement, the contact between the external terminal and the cover plate is limited by the insulating seat matched with the insulating seat.

Further, be equipped with the sealing washer between insulating piece and the apron on the outer end, the sealing washer center is equipped with the round hole that is used for through the outer end, through this setting, makes the inside sealed effect of casing better.

Further, the casing top surface is arranged in to the apron, and the casing outside is arranged in up to external end one end, and the casing is arranged in down to the other end, and the copper column is connected in external end bottom one end, and the copper sheet is connected in copper column bottom one end, through this setting, overall structure top-down, and the appearance is pleasing to the eye, is convenient for install and dismantlement, and space utilization is high.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a self-breaking power capacitor according to an embodiment of the present disclosure;

fig. 2 is an exploded view of a self-breaking power capacitor according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a cover plate in a self-breaking power capacitor according to an embodiment of the present disclosure;

fig. 4 is an exploded schematic view of an output terminal, a copper pillar and a copper sheet in the self-breaking power capacitor according to the embodiment of the present application;

fig. 5 is a schematic structural diagram of a protection component in a self-breaking power capacitor according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of an explosion structure of a fuse assembly in a self-breaking power capacitor according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of an insulation box in a self-breaking power capacitor according to an embodiment of the present disclosure;

fig. 8 is a schematic diagram of a partial structure of a longitudinal section of a self-breaking power capacitor according to an embodiment of the present application.

Wherein, each reference sign in the figure:

1. a housing; 2. a cover plate; 21. an external interface; 22. a grounding port; 3. an external connection end; 31. a limiting plate; 41. Copper columns; 42. copper sheets; 421. a limit groove; 43. an insulation box; 431. copper pillar holes; 432. copper sheet grooves; 433. screw holes; 44. an insulating block; 45. a lock nut; 46. a seal ring; 5. an insulating base.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

The technical solutions in this embodiment will be clearly and completely described below with reference to the drawings in this embodiment.

Referring to fig. 1 to 4, a self-breaking power capacitor includes: casing 1, apron 2, external end 3 and insurance subassembly are equipped with the opening on the casing 1, and the apron 2 covers the opening part of locating casing 1, is equipped with ground connection 22 and external connection 21 on the apron 2, and external end 3 wears to locate in the external connection 21 of apron 2, and external end 3 is equipped with three, and insurance subassembly includes copper post 41, copper sheet 42, and copper post 41 one end is connected in external end 3 and is arranged in casing 1 inside one side, copper post 41 other end and copper sheet 42 spot welding connection, and copper sheet 42 is fixed in inside casing 1.

After the assembly, the cover plate 2 is covered to separate the inside of the shell 1 from the outside, the cover plate 2 is not opened in the use process, and the internal circuit is connected to the copper column 41 and the external connection terminal 3 through the copper sheet 42, thereby being connected with the outside. When the capacitor breaks down, the internal pressure of the shell 1 is increased, the shell 1 is deformed, the cover plate 2 bulges through air pressure, the spot welding positions between the copper columns 41 and the copper sheets 42 are rapidly separated, and the power supply can be disconnected in time only by separating any two of the three spot welding positions. The mode of adopting copper sheet 42 and copper post 41 spot welding has guaranteed that normal state is stable can not drop, and in time break off when the trouble, and spot welding still has and need not other consumptive materials, relies on copper sheet 42 and copper post 41 itself to accomplish, and energy saving, labour saving and time saving, advantage that the cost is lower.

Compared with the prior art, the self-breaking power capacitor provided by the embodiment of the application has the advantages that the technical problems that the connecting part is unstable, the connecting part is easy to fall off, the connecting operation is complex, the breaking is not timely, and the breaking effect is poor in the related art are solved.

In this embodiment, referring to fig. 1, 2 and 8, an insulating base 5 is provided, the insulating base 5 is connected to the cover 2 and is disposed outside the housing 1, the external terminal 3 is disposed outside the housing 1, one side of the external terminal 3 penetrates through the insulating base 5, and a gap exists between the side surface of the external terminal 3 and the external interface 21.

The three holes on the insulating seat 5 correspond to the three output ends respectively, the holes on the insulating seat 5 and the outer interfaces 21 on the cover plate 2 are all round in the same shape, the round surface area is small, and the external connection end 3 is limited by the insulating seat 5 and can not touch the cover plate 2 all the time in the shaking process.

So set up, apron 2 and casing 1 link to each other and are mostly made of metallic material, have conductivity, and insulating seat 5 has restricted the contact between external terminal 3 and the apron 2, and apron 2 and casing 1 are electrified when preventing to switch on, influence power capacitor's use.

In this embodiment, referring to fig. 1, 2 and 8, the external terminal 3 is provided with a limiting plate 31, the limiting plate 31 is located at one side of the external terminal 3 outside the housing 1, and the limiting plate 31 abuts against the opening of the end face of the insulating base 5.

The limiting plate 31 is in a disc-shaped structure, is welded with the external connection end 3 into a whole, and the circular surface area of the limiting plate 31 is larger than the hole site of the insulating seat 5.

So set up, limiting plate 31 can fix external end 3, and the part is arranged in the insulating seat 5 outside, prevents that external end 3 is whole to fall into inside the casing 1, makes external end 3 expose in outside small excessively, is difficult for carrying out external work.

In this embodiment, referring to fig. 2, 6 and 7, the safety assembly includes an insulation box 43, the insulation box 43 is connected to the cover plate 2 and placed inside the housing 1, and a copper pillar hole 431 for passing through the copper pillar 41 is formed in the insulation box 43.

The insulation box 43 is used for wrapping all one end of the external connection end 3 in the shell 1, the copper column 41, the insulation block 44 and the sealing ring 46 into the insulation box 43, a copper column hole 431 is reserved on the insulation box 43, and a small part of the copper column 41 can be exposed from the insulation box 43 to be spot-welded with the copper sheet 42 during installation.

By the arrangement, the capacitor core is ensured to be connected with the copper sheet 42 only in a circuit manner, and other parts are prevented from being interfered.

In this embodiment, referring to fig. 7, a copper sheet slot 432 is disposed on one surface of the insulation box 43 with copper column holes 431, the number of copper sheet slots 432 is equal to that of copper column holes 431, the copper column holes 431 are located at the right center of the corresponding copper sheet slots 432, screw holes 433 are disposed in the copper sheet slots 432, two screw holes 433 are disposed in each copper sheet slot 432, the copper sheet slots 432 are located at two sides of the copper column holes 431, the copper sheet slots 432 are located at the outer surface of the insulation box 43, and the copper sheet 42 is connected in the copper sheet slots 432 by matching with the screw holes 433.

Seven copper pillar holes 431 are formed, three copper pillars 41 are sequentially arranged in a straight line, seven copper pillar holes 431 are correspondingly formed in the copper sheet grooves 432, and three copper sheets 42 are fixed in the copper sheet grooves 432 correspondingly exposed with the copper pillars 41 through screw holes 433 in a matched mode.

So set up, copper sheet 42 can imbed in copper sheet groove 432 when the installation, plays the effect of location, makes the installation more convenient directly perceivedly, and copper sheet groove 432 and copper post hole 431 quantity that corresponds on the insulating box 43 all are greater than external terminal 3's quantity, can increase more external terminals 3 when being convenient for necessary.

In the present embodiment, referring to fig. 4 and 8, the copper sheet 42 is provided with a limiting groove 421, the copper column 41 is embedded in the limiting groove 421, and the copper column 41 and the copper sheet 42 are spot-welded and connected to the limiting groove 421.

The cross section of the limiting groove 421 is the same as that of the copper column 41, and the limiting groove is circular.

By the arrangement, the copper column 41 and the copper sheet 42 are conveniently connected and positioned on one hand, and stability after spot welding is also facilitated on the other hand.

In this embodiment, referring to fig. 2, 5, 6 and 8, an insulating block 44 is disposed on one side of the external connection end 3 disposed inside the housing 1, a locking nut 45 is disposed between the insulating block 44 and an end surface of the external connection end 3 disposed on one side of the housing 1, and the external connection end 3 is inserted into the insulating block 44 and has a gap with the external interface 21.

The insulating block 44 is provided with three output ends corresponding to three output ends respectively, and is locked towards the cover plate 2 by the lock nuts 45, so that the insulating block 44 is fixed on the external connection end 3 and does not fall off, the shape of the hole on the insulating block 44 is the same as that of the external interface 21 on the cover plate 2, the area of the circular surface is small, and the external connection end 3 is limited by the insulating block 44 and can not touch the cover plate 2 all the time in the shaking process.

So set up, insulating seat 5 cooperation insulating seat 5 has restricted the contact between external terminal 3 and the apron 2, and apron 2 and casing 1 are electrified when preventing the circular telegram, influence power capacitor's use.

In this embodiment, referring to fig. 2, 5, 6 and 8, a sealing ring 46 is disposed between the insulating block 44 and the cover plate 2 on the external connection terminal 3, and a circular hole for passing through the external connection terminal 3 is disposed in the center of the sealing ring 46.

The cross section of the sealing ring 46 is circular, the radius of the inner ring of the sealing ring is smaller than the radius of the cross section of the outer joint 21, the radius of the outer ring of the sealing ring is larger than the radius of the cross section of the insulating block 44, and the sealing ring 46 is tightly attached to the outer joint 21 of the cover plate 2 under the action of the locking nut 45.

This arrangement provides a better sealing effect inside the housing 1, and the internal gas is less likely to flow out of the external port 21.

In this embodiment, referring to fig. 1 and 2, the cover 2 is disposed on the top surface of the housing 1, one end of the external connection terminal 3 is disposed on the outside of the housing 1, the other end is disposed inside the housing 1, the copper pillar 41 is connected to one end of the bottom of the external connection terminal 3, and the copper sheet 42 is connected to one end of the bottom surface of the copper pillar 41.

So set up, overall structure top-down, the appearance is pleasing to the eye, is convenient for install and dismantle, and space utilization is high.

The foregoing description of the preferred embodiment of the present utility model is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims (9)

1. A self-breaking power capacitor comprising:

the device comprises a shell (1), wherein an opening is formed in the shell (1);

the cover plate (2) is arranged at the opening of the shell (1) in a covering mode, and the cover plate (2) is provided with a grounding port (22) and an external port (21);

the external connection end (3) is penetrated in the external interface (21) of the cover plate (2), and the external connection end (3) is provided with two or more than two;

the safety assembly comprises a copper column (41) and a copper sheet (42), wherein one end of the copper column (41) is connected with an external connection end (3), the copper column (41) is arranged on one side of the inside of the shell (1), the other end of the copper column (41) is connected with the copper sheet (42) in a spot welding mode, and the copper sheet (42) is arranged inside the shell (1).

2. The self-interrupting power capacitor of claim 1, wherein: the novel electric power socket further comprises an insulating seat (5), wherein the insulating seat (5) is connected to the cover plate (2) and is arranged outside the shell (1), the external connection end (3) is arranged on one side outside the shell (1) and penetrates through the insulating seat (5), and the outer diameter of the external connection end (3) is smaller than the inner diameter of the external interface (21).

3. The self-interrupting power capacitor of claim 2, wherein: be equipped with limiting plate (31) on outer end (3), limiting plate (31) are located outer one side of arranging in casing (1) in outer end (3), limiting plate (31) butt insulation seat (5) terminal surface opening part.

4. The self-interrupting power capacitor of claim 1, wherein: the safety component comprises an insulation box (43), wherein the insulation box (43) is connected to the cover plate (2) and is arranged inside the shell (1), and a copper column hole (431) used for penetrating through the copper column (41) is formed in the insulation box (43).

5. The self-interrupting power capacitor of claim 4 wherein: copper sheet grooves (432) are formed in one face, corresponding to the copper column holes (431), of the insulating box (43), the number and the positions of the copper sheet grooves (432) correspond to those of the copper column holes (431), screw holes (433) are formed in the copper sheet grooves (432), two or more than two screw holes (433) are formed in each copper sheet groove (432) in a corresponding mode, and copper sheets (42) are connected in the copper sheet grooves (432) in a matched mode through the screw holes (433).

6. The self-interrupting power capacitor of claim 1, wherein: the copper sheet (42) is provided with a limit groove (421), the copper column (41) is embedded in the limit groove (421), and the copper column (41) and the copper sheet (42) are in spot welding connection with the limit groove (421).

7. The self-interrupting power capacitor of claim 1, wherein: the external connection end (3) is arranged on one side of the inside of the shell (1) and is provided with an insulating block (44), a lock nut (45) is arranged between the insulating block (44) and the end face of one side of the external connection end (3) arranged inside the shell (1), and the external connection end (3) penetrates through the insulating block (44) and has a gap with the external interface (21).

8. The self-interrupting power capacitor of claim 7, wherein: and a sealing ring (46) is arranged between the insulating block (44) and the cover plate (2) on the external connection end (3).

9. The self-interrupting power capacitor of claim 1, wherein: the cover plate (2) is arranged on the top surface of the shell (1), one end of the external connection end (3) is upwards arranged on the outer side of the shell (1), the other end of the external connection end is downwards arranged in the shell (1), the copper column (41) is connected to one end of the bottom of the external connection end (3), and the copper sheet (42) is connected to one end of the bottom surface of the copper column (41).