A capacitor protection structure and a capacitor

Abstract

The present invention relates to the technical field of capacitors, and provides a capacitor protection structure and a capacitor, including a rigid skeleton, a protective cover, an axial protection part and a radial protection part. The rigid skeleton includes cross beams. Curve guide rails are arranged on the surface of the protective cover, and a plurality of curve guide rails are symmetrically distributed with respect to the protective cover. The axial protection part includes rigid rings and springs, and the springs are connected between two middle rigid rings. The inner side of the rigid ring is slidably connected with the curve guide rail, and the cross beam is slidably connected with the outer side of the rigid ring. The radial protection part includes U-shaped members, elastic covers and wedge-shaped protrusions. The elastic covers penetrate through a plurality of the U-shaped members, and wedge-shaped protrusions are arranged on the inner sides of the U-shaped members. The rigid ring is in sliding contact with the wedge-shaped protrusions. It can not only expand the protection range and buffer area from the radial and axial positions of the capacitor body, but also reduce the damage degree caused by possible subsequent lateral impact or longitudinal impact to the capacitor body, and has the characteristics of good protection effect and strong impact resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitors, and in particular to a capacitor protection structure and a capacitor. Background Art

[0002] The outline of large power capacitors generally adopts a cylindrical design, especially in high-voltage power capacitors. The cylindrical shell helps to evenly distribute the electric field and reduce the area of ​​concentrated electric field strength, which is suitable for high-voltage applications. Large power capacitors may be affected by various impact forces during operation and maintenance. The sources of impact force mainly include: voltage surges, mechanical vibrations, physical collisions during disassembly and assembly, thermal shock caused by temperature changes, earthquakes and strong winds, etc.

[0003] Patent No. CN114927342B discloses a capacitor protection device and a capacitor, including a protective shell with a protective function, a dust removal mechanism with a dust removal function is arranged on the protective shell, a pre-tightening mechanism with a pre-tightening effect is arranged on the protective shell, and a fixing mechanism for conveniently fixing the lead is arranged on the protective shell. The dust removal mechanism drives the pre-tightening mechanism to work, which can effectively protect the capacitor, dissipate heat and remove dust from the capacitor, thereby improving the working efficiency of the capacitor. In addition, when the washing machine shakes during operation, it plays a pre-tightening role to prevent the capacitor from being installed loosely.

[0004] Since the direction and source of the impact force on the capacitor are unpredictable, for example, when an earthquake causes an object to fall off and hit the capacitor vertically, it is possible that objects coming from the side or horizontally will hit the capacitor. Therefore, the capacitor needs to have the ability to resist impact both vertically and horizontally. In particular, after being impacted in one direction, it can automatically or in advance improve the impact resistance in other directions. This is a common defect in existing large capacitors and a technical problem that needs to be urgently solved in the capacitor industry. Summary of the invention

[0005] The object of the present invention is to provide a capacitor protection structure and a capacitor, aiming to solve the problems existing when using existing capacitors.

[0006] To achieve the above object, the present invention provides the following technical solution: a capacitor protection structure, comprising:

[0007] a rigid framework, the rigid framework comprising a crossbeam;

[0008] A protective cover is located in the rigid frame, wherein a curved guide rail is provided on the surface of the protective cover, and a plurality of the curved guide rails are symmetrically distributed about the protective cover;

[0009] Axial protection part, the axial protection part includes a rigid ring and a spring, the spring is connected between two of the rigid rings in the middle, the inner side of the rigid ring is slidably connected to the curved guide rail, and the cross beam is slidably connected to the outer side of the rigid ring;

[0010] Radial protection part, the radial protection part includes a C-shaped part, an elastic cover and a wedge-shaped protrusion, the elastic cover penetrates through several of the C-shaped parts, a wedge-shaped protrusion is arranged on the inner side of the C-shaped part, and the rigid ring is in sliding contact with the wedge-shaped protrusion.

[0011] As a further solution of the present invention, the elastic cover is made of elastic metal material, several groups of annular grooves are arranged on both the inner and outer sides of the protective cover, and first heat dissipation holes and second heat dissipation holes are respectively arranged on the surfaces of the protective cover and the elastic cover.

[0012] As a further solution of the present invention, the rigid skeleton further includes a base, a first radial groove and a cover, the base and the cover are respectively fixedly connected to both ends of the cross beam, first radial grooves are arranged on the surfaces of the base and the cover, and the C-shaped part is slidably connected in the first radial groove.

[0013] As a further solution of the present invention, the axial protection part further includes a spherical protrusion and a second radial groove, the spherical protrusion is arranged on the inner side of the rigid ring, the curved guide rail is slidably connected to the spherical protrusion, the second radial groove is arranged on the outer side of the rigid ring, and the cross beam is slidably connected to the second radial groove.

[0014] As a further solution of the present invention, a through hole is arranged on the inner side of the C-shaped part, the elastic cover is connected to the inner side of the through hole, and the wedge-shaped protrusion is fixedly connected to the outer side of the through hole.

[0015] As a further solution of the present invention, the axial protection part further includes a fixing pin and a fixing ring, fixing pins are respectively fixedly connected to two rigid rings close to the base and the cover, several of the fixing pins close to the cover are all fixedly connected to the fixing ring, and the fixing pins penetrate through the first radial groove.

[0016] As a further solution of the present invention, oblong holes are respectively arranged at both ends of the C-shaped part, and the fixing pin is in sliding contact with the oblong hole.

[0017] As a further solution of the present invention, the inclination directions of two groups of curved guide rails symmetrically distributed with respect to the protective cover are opposite.

[0018] As a further solution of the present invention, both ends of the protective cover are in sliding contact with the base and the cover respectively.

[0019] A capacitor, including a capacitor body, an electrode is arranged at one end of the capacitor body, the electrode penetrates through the cover, the capacitor body is located inside the protective cover, and a fastener is fixedly connected between the other end of the capacitor body and the base.

[0020] The beneficial effects of the present invention are as follows: When the present application is subjected to lateral or longitudinal impact forces, while using the compression and stretching of the springs to buffer and weaken the impact forces, not only can the protection range and buffer area be expanded from both ends of the capacitor body by driving the four rigid rings to diffuse along the axial direction of the capacitor body, thereby further reducing the damage degree caused by the possible subsequent longitudinal impact to the capacitor body, but also the movement of the two rigid rings can be used to increase the overall load-bearing area or diameter, thereby achieving the purpose of improving the anti-longitudinal impact or anti-load capacity and expanding the protection range and buffer area from the surrounding of the capacitor body, and further reducing the damage degree caused by the possible subsequent lateral impact to the capacitor body. It has the characteristics of good protection effect and strong anti-impact ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the first three-dimensional view of the present invention.

[0022] Figure 2 is the exploded view of the present invention.

[0023] Figure 3 is the three-dimensional view of the rigid framework in the embodiment of the present invention.

[0024] Figure 4 is the three-dimensional view of the axial protection part in the embodiment of the present invention.

[0025] Figure 5 is the assembly drawing of the axial protection part and the protective cover in the embodiment of the present invention.

[0026] Figure 6 is the three-dimensional view of the radial protection part in the embodiment of the present invention.

[0027] Figure 7 is the partial cross-sectional view of the present invention.

[0028] Figure 8 is the second three-dimensional view of the present invention.

[0029] Figure 9 is the top view of the present invention.

[0030] Figure 10 is the plane expansion view of the protective cover in the embodiment of the present invention.

[0031] Reference numerals: 1 - capacitor body, 11 - electrode, 2 - rigid framework, 21 - base, 22 - crossbeam, 23 - cover, 24 - first radial groove, 3 - protective cover, 31 - curved guide rail, 32 - first heat dissipation hole, 4 - axial protection part, 41 - rigid ring, 411 - spherical protrusion, 412 - second radial groove, 42 - spring, 43 - fixing pin, 44 - fixing ring, 5 - radial protection part, 51 - C-shaped part, 511 - through opening, 512 - oblong hole, 513 - wedge-shaped protrusion, 52 - elastic cover, 521 - second heat dissipation hole, 6 - fastener. Detailed implementation mode

[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] The following describes in detail the specific implementation of the present invention in conjunction with specific embodiments.

[0034] Please refer to Figures 1 to 10 , in an embodiment of the present invention, a capacitor protection structure, a capacitor protection structure, includes:

[0035] A rigid framework 2, the rigid framework 2 includes a crossbeam 22;

[0036] A protective cover 3 located inside the rigid framework 2, a curved guide rail 31 is provided on the surface of the protective cover 3, and a plurality of the curved guide rails 31 are symmetrically distributed about the protective cover 3;

[0037] An axial protection part 4, the axial protection part 4 includes a rigid ring 41 and a spring 42, the spring 42 is connected between two of the rigid rings 41 in the middle, the inner side of the rigid ring 41 is slidably connected to the curved guide rail 31, and the crossbeam 22 is slidably connected to the outer side of the rigid ring 41;

[0038] A radial protection part 5, the radial protection part 5 includes a C-shaped part 51, an elastic cover 52 and a wedge-shaped protrusion 513, the elastic cover 52 penetrates through a plurality of the C-shaped parts 51, a wedge-shaped protrusion 513 is provided on the inner side of the C-shaped part 51, the rigid ring 41 is in sliding contact with the wedge-shaped protrusion 513, and the C-shaped part 51 is a C-shaped metal rod.

[0039] Please refer to Figure 3 and Figure 7 , further, the rigid framework 2 further includes a base 21, a first radial groove 24 and a cover 23, the base 21 and the cover 23 are respectively fixedly connected to both ends of the crossbeam 22, first radial grooves 24 are provided on the surfaces of the base 21 and the cover 23, and the C-shaped part 51 is slidably connected in the first radial groove 24.

[0040] Please refer to Figures 4 to 7 , further, the axial protection part 4 further includes a spherical protrusion 411 and a second radial groove 412. A spherical protrusion 411 is arranged inside the rigid ring 41, the curve guide rail 31 is slidably connected with the spherical protrusion 411, a second radial groove 412 is arranged outside the rigid ring 41, and the cross beam 22 is slidably connected with the second radial groove 412.

[0041] Please refer to Figures 7 to 9 , further, a through port 511 is arranged inside the C-shaped part 51, the elastic cover 52 is connected to the inside of the through port 511, and the wedge-shaped protrusion 513 is fixedly connected to the outside of the through port 511.

[0042] Please refer to Figures 4 to 9 , further, the axial protection part 4 further includes a fixing pin 43 and a fixing ring 44. Fixing pins 43 are respectively fixedly connected to two rigid rings 41 close to the base 21 and the cover 23, and several fixing pins 43 close to the cover 23 are all fixedly connected to the fixing ring 44. The fixing pin 43 penetrates through the first radial groove 24. The specific connection method between the fixing pin 43 and the rigid ring 41 is not limited and can be designed as a threaded connection for the purpose of facilitating disassembly and repair, or can also be designed as welding for the purpose of ensuring the stability of the connection and preventing loosening. The reason for connecting several fixing pins 43 close to the cover 23 to the fixing ring 44 is that when subjected to a longitudinal impact force, no matter where the impact point of the impact force is distributed on the surface of the fixing ring 44, it can ensure that the axial protection part 4 intervenes to play a protective role.

[0043] In the embodiment of the present invention, long circular holes 512 are respectively arranged at both ends of the C-shaped part 51, the fixing pin 43 is in sliding contact with the long circular holes 512. The inclination directions of two groups of curve guide rails 31 symmetrically distributed with respect to the protective cover 3 are opposite. Both ends of the protective cover 3 are in sliding contact with the base 21 and the cover 23 respectively. The cross beam 22 plays a role in protection and limitation. It is not only used to enhance the overall strength and stability of the capacitor, but also can ensure that the rigid ring 41 makes an axial displacement along the cross beam 22 through the second radial groove 412, and can also prevent the protective cover 3 from falling off. Each rigid ring 41 corresponds to two groups of spherical protrusions 411 and two groups of curve guide rails 31. Refer to the appendix Figure 10 , the inclination directions of two groups of curve guide rails 31 corresponding to each rigid ring 41 are the same. The rigid ring 41 and the spherical protrusion 411 can adopt an integral molding process or can also be fixed by a welding process.

[0044] Please refer to Figure 6 and Figure 7, in an embodiment of the present invention, the elastic cover 52 is made of elastic metal. A plurality of groups of annular grooves are provided on both the inner and outer sides of the protective cover 3. First heat dissipation holes 32 and second heat dissipation holes 521 are respectively provided on the surfaces of the protective cover 3 and the elastic cover 52.

[0045] In the embodiment of the present invention, the first heat dissipation holes 32 and the second heat dissipation holes 521 play a role in heat dissipation. The elastic cover 52 made of elastic metal, on the one hand, plays a role in protection and transmits the impact force to the C-shaped member 51 through deformation, and can also play a role in heat dissipation. The specific principle is as follows: When the heat generated by the capacitor body 1 diffuses into the elastic cover 52 through the first heat dissipation holes 32, on the one hand, it diffuses out through the second heat dissipation holes 521, and on the other hand, it is transmitted to the air through a plurality of groups of annular grooves on the surface of the protective cover 3. The annular grooves play a role in increasing the contact area with the air, thereby playing a good heat dissipation role.

[0046] Please refer to Figure 1 , Figure 2 and Figure 9 , in an embodiment of the present invention, a capacitor includes a capacitor body 1. An electrode 11 is provided at one end of the capacitor body 1. The electrode 11 penetrates through the sealing cover 23. The capacitor body 1 is located inside the protective cover 3. A fastener 6 is fixedly connected between the other end of the capacitor body 1 and the base 21.

[0047] In the embodiment of the present invention, the capacitor body 1 is cylindrical in shape. The purpose is to evenly distribute the electric field. In high-voltage electric field applications, it can reduce the electric field intensity concentration area. The fastener 6 can be a combination of a stud and a nut, or a hot melt column. The fastener 6 is directly connected to the base 21.

[0048] Working principle: When the capacitor is subjected to a lateral impact force, whether the impact force directly acts on the U-shaped part 51 or the elastic cover 52, since the U-shaped parts 51 are connected in series through the elastic cover 52, the impact force will be transmitted to each U-shaped part 51 through the elastic deformation of the elastic cover 52, so that the U-shaped part 51 moves towards the capacitor body 1. The wedge-shaped protrusion 513 of the displacement transmits the impact force to the two groups of rigid rings 41 by sliding connection with the two symmetrical groups of rigid rings 41, so that the two groups of rigid rings 41 move in opposite directions. During this process, the stretched spring 42 plays a role in buffering and weakening the impact force, and the spherical protrusion 411 that has undergone displacement drives the protective cover 3 to rotate by sliding connection with the curve guide rail 31. The rotation of the protective cover 3 can also drive the other two groups of rigid rings 41 to move synchronously in opposite directions. At this time, the four groups of rigid rings 41 with relatively concentrated positions can spread along the axial direction of the capacitor body 1 under the action of the lateral impact force, so as to achieve the purpose of expanding the protection range of the capacitor body 1. In addition, the fixing pins 43 and fixing rings 44 at the other two groups of rigid rings 41 can expand the protection range and buffer area from both ends of the capacitor body 1 by means of axial displacement, so as to further reduce the damage degree caused by the possible subsequent longitudinal impact on the capacitor body 1.

[0049] When the capacitor is subjected to a longitudinal impact force from the direction of the electrode 11, since the fixing pin 43 or the fixing ring 44 protrudes from the cover 23, the acting force will be directly transmitted from the fixing pin 43 or the fixing ring 44 to the rigid ring 41, so that the rigid ring 41 undergoes displacement. The displaced rigid ring 41 drives the protective cover 3 to rotate by sliding connection with the curve guide rail 31 using the spherical protrusion 411. The rotating protective cover 3 again drives the remaining rigid rings 41 to move towards each other by sliding connection with the curve guide rail 31 using the spherical protrusion 411. At this time, the compressed spring 42 plays a role in buffering and weakening the impact force. In addition, the two groups of rigid rings 41 moving towards each other in the middle drive each U-shaped part 51 to move away from the capacitor body 1 at the same time by sliding connection with the wedge-shaped protrusion 513, so as to increase the overall load-bearing area or diameter, not only achieving the purpose of improving the anti-longitudinal impact or anti-load capacity, but also achieving the purpose of expanding the protection range and buffer area from the periphery of the capacitor body 1, so as to further reduce the damage degree caused by the possible subsequent lateral impact on the capacitor body 1.

[0050] In summary, on the premise of using the extrusion and stretching of the spring 42 to buffer and weaken the impact force, not only can the protection range and buffer area be expanded from both ends of the capacitor body 1 by driving the four groups of rigid rings 41 to diffuse along the axial direction of the capacitor body 1, so as to further reduce the damage degree caused by the possible subsequent longitudinal impact on the capacitor body 1, but also the movement of the two groups of rigid rings 41 can be used to increase the overall load-bearing area or diameter, thereby achieving the purpose of improving the anti-longitudinal impact or anti-load capacity and expanding the protection range and buffer area from the periphery of the capacitor body 1, so as to further reduce the damage degree caused by the possible subsequent transverse impact on the capacitor body 1, and having the characteristics of good protection effect and strong anti-impact ability.

[0051] For those skilled in the art, although several embodiments and examples of the present invention have been described, these embodiments and examples are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and its equivalents.

[0052] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A capacitor protection structure, characterized in that, Comprising: A rigid framework (2), said rigid framework (2) including crossbeams (22); A protective cover (3) located within the rigid framework (2), a curved guide rail (31) being provided on the surface of the protective cover (3), and a plurality of said curved guide rails (31) being symmetrically distributed with respect to the protective cover (3); An axial protection part (4), said axial protection part (4) including rigid rings (41) and springs (42), said springs (42) being connected between two of the middle rigid rings (41), the inner side of the rigid rings (41) being slidably connected to the curved guide rail (31), and the crossbeams (22) being slidably connected to the outer sides of the rigid rings (41); A radial protection part (5), said radial protection part (5) including U-shaped members (51), elastic covers (52) and wedge-shaped protrusions (513), the elastic covers (52) passing through a plurality of said U-shaped members (51), wedge-shaped protrusions (513) being provided on the inner sides of the U-shaped members (51), and the rigid rings (41) being in sliding contact with the wedge-shaped protrusions (513); The axial protection part (4) further includes spherical protrusions (411) and second radial grooves (412), spherical protrusions (411) being provided on the inner sides of the rigid rings (41), the curved guide rail (31) being slidably connected to the spherical protrusions (411), and second radial grooves (412) being provided on the outer sides of the rigid rings (41), the crossbeams (22) being slidably connected to the second radial grooves (412).

2. The capacitor protection structure according to claim 1, characterized in that The elastic cover (52) is made of elastic metal material, a plurality of groups of annular grooves are provided on both the inner and outer sides of the protective cover (3), and first heat dissipation holes (32) and second heat dissipation holes (521) are respectively provided on the surfaces of the protective cover (3) and the elastic cover (52).

3. A capacitor protection structure according to claim 1, characterized in that, The rigid framework (2) further includes a base (21), first radial grooves (24) and covers (23), the base (21) and the covers (23) being respectively fixedly connected to both ends of the crossbeams (22), first radial grooves (24) being provided on the surfaces of the base (21) and the covers (23), and the U-shaped members (51) being slidably connected within the first radial grooves (24).

4. The capacitor protection structure according to claim 3, characterized in that Through holes (511) are provided on the inner sides of the U-shaped members (51), the elastic covers (52) being connected to the inner sides of the through holes (511), and the wedge-shaped protrusions (513) being fixedly connected to the outer sides of the through holes (511).

5. A capacitor protection structure according to claim 4, characterized in that, The axial protection part (4) further includes fixing pins (43) and fixing rings (44), fixing pins (43) being respectively fixedly connected to two rigid rings (41) close to the base (21) and the covers (23), a plurality of said fixing pins (43) close to the covers (23) being fixedly connected to the fixing ring (44), and the fixing pins (43) passing through the first radial grooves (24).

6. A capacitor protection structure according to claim 5, characterized in that, Elongated circular holes (512) are respectively provided at both ends of the U-shaped members (51), and the fixing pins (43) are in sliding contact with the elongated circular holes (512).

7. A capacitor protection structure according to claim 1, characterized in that, The inclination directions of two groups of curved guide rails (31) symmetrically distributed with respect to the protective cover (3) are opposite.

8. The capacitor protection structure according to claim 1, characterized in that, Both ends of the protective cover (3) are respectively in sliding contact with the base (21) and the covers (23).

9. A capacitor, comprising a capacitor body (1), characterized in that, Including a capacitor protection structure according to any one of claims 1-8, one end of the capacitor body (1) is provided with an electrode (11), the electrode (11) penetrates through the cover (23), the capacitor body (1) is located inside the protective cover (3), and a fastener (6) is fixedly connected between the other end of the capacitor body (1) and the base (21).

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