Plum blossom contact of high-voltage vacuum circuit breaker

Abstract

The utility model discloses a tulip contact of a high-voltage vacuum circuit breaker, which comprises a solid-sealed polar pole, the solid-sealed polar pole is provided with an upper contact arm and a lower contact arm, the upper contact arm and the lower contact arm are provided with protective sleeves, the side wall of each protective sleeve is provided with a plurality of heat dissipation holes, and the heat dissipation holes are communicated with the heat dissipation holes. The upper contact arm and the lower contact arm are provided with conducting rods and are arranged in the protective sleeve, each conducting rod is provided with a tulip contact, each tulip contact comprises a contact piece, the back face of each contact piece is provided with a heat conduction plate, each heat conduction plate is provided with a heat dissipation block, and each heat dissipation block is provided with a plurality of heat dissipation fins. The contact area with the contact piece is increased through the heat conduction plate and the elastic part, the heat conduction efficiency is improved, the heat conduction plate conducts heat to the heat dissipation fins and exchanges the heat with air, the density of the heated air is reduced, air convection is formed, the temperature of the tulip contact is further effectively reduced, and the tulip contact has the advantages that the service life is prolonged, and the temperature rise is controlled.

Description

Technical Field

[0001] This utility model relates to the field of vacuum circuit breaker technology, and in particular to a plum blossom contact of a high-voltage vacuum circuit breaker. Background Technology

[0002] Vacuum circuit breakers are named for their high-vacuum nature, which is both the arc-extinguishing medium and the insulating medium between the contacts after arc extinguishing. They are characterized by their small size, light weight, suitability for frequent operation, and maintenance-free arc extinguishing, making them widely used in power distribution networks. Vacuum circuit breakers are indoor power distribution devices in 3-10kV, 50Hz three-phase AC systems, used for the protection and control of electrical equipment in industrial and mining enterprises, power plants, and substations. They are particularly suitable for applications requiring oil-free operation, minimal maintenance, and frequent operation.

[0003] The high-voltage vacuum circuit breaker's sprite contacts generate high temperatures during operation. These high temperatures cause the springs surrounding the outer wall of the sprite contacts to age and lose elasticity, resulting in insufficient contact pressure and increased contact resistance, creating a vicious cycle that may ultimately damage the contacts. Therefore, the applicant has made beneficial designs and found a way to solve the above problems. The technical solution to be introduced below was developed in this context. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the traditional high-voltage vacuum circuit breaker's sprite contact design and to provide a product that improves service life and controls temperature rise.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A high-voltage vacuum circuit breaker's sprite-shaped contact includes a solid-sealed pole, an upper contact arm and a lower contact arm, both of which are provided with protective sleeves. The protective sleeves have several heat dissipation holes on their side walls. Each upper and lower contact arm has a conductive rod disposed within the protective sleeve. The conductive rod has a sprite-shaped contact, which includes a contact piece. A heat-conducting plate is provided on the back of the contact piece. The heat-conducting plate has a heat dissipation block with several heat dissipation fins. Elastic portions are provided on both sides of the heat-conducting plate, clamping and abutting against the sides of the contact piece.

[0007] Preferably, the plum blossom contact further includes an annular grid plate, which has a plurality of grooves for accommodating the contact plate evenly distributed around the dot as the axis.

[0008] Preferably, a first annular spring and a second annular spring are provided on the upper and lower sides of the back of the contact piece, so that the contact piece retracts towards the center of the annular grid.

[0009] Preferably, the back of the contact piece is provided with at least two mounting holes.

[0010] Preferably, the elastic part includes a curved energy storage part, one end of which extends to form an abutment portion that abuts against the side wall of the contact piece, and the other end of which is disposed on one side of the heat-conducting plate.

[0011] Preferably, the heat-conducting plate and the heat sink are provided with threaded holes corresponding to the mounting holes, and the threaded holes of the heat sink are provided with fastening screws and are threadedly connected to the mounting holes.

[0012] Preferably, the heat sinks are spaced apart from each other, and the heat sinks are made of aluminum.

[0013] Beneficial effects:

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention increases the contact area with the contact piece by using a heat-conducting plate and an elastic part, thereby improving the heat conduction efficiency. The heat-conducting plate conducts heat to several heat dissipation fins and exchanges heat with the air. The air becomes less dense after being heated, and naturally rises and is discharged through the heat dissipation holes at the top. New cool air is continuously replenished into the protective sleeve from the heat dissipation holes at the bottom, thus forming convection. This effectively reduces the temperature of the plum blossom contact and overcomes the problems mentioned in the background technology, giving the product the advantages of improved service life and controlled temperature rise. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the plum blossom contact of a high-voltage vacuum circuit breaker according to the present invention;

[0017] Figure 2 This is a partial cross-sectional structural diagram of the plum blossom contact of a high-voltage vacuum circuit breaker according to this utility model;

[0018] Figure 3 For this utility model Figure 2 A partial enlarged view A of the sprite contact of a high-voltage vacuum circuit breaker;

[0019] Figure 4 This is an exploded structural diagram of the plum blossom contact of a high-voltage vacuum circuit breaker according to the present invention;

[0020] Figure 5 For this utility model Figure 4 A partial enlarged view (B) of the sprite-shaped contact of a high-voltage vacuum circuit breaker;

[0021] The correspondence between the labels and component names in the attached figures is as follows:

[0022] Reference numerals: 1. Solid-sealed pole; 2. Protective sleeve; 3. Conductive rod; 4. Plexicon contact; 5. Heat-conducting plate; 6. Heat sink; 7. Threaded hole; 8. Fastening screw; 11. Upper contact arm; 12. Lower contact arm; 21. Heat dissipation hole; 41. Contact piece; 42. Annular grid; 43. First annular spring; 44. Second annular spring; 411. Mounting hole; 421. Groove; 51. Elastic part; 52. Energy storage part; 53. Contact part; 61. Heat dissipation fin. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0025] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0026] Reference example Figures 1 to 5 A high-voltage vacuum circuit breaker with a sprite-shaped contact includes a solid-sealed pole 1. The solid-sealed pole 1 is provided with an upper contact arm 11 and a lower contact arm 12. The upper contact arm 11 and the lower contact arm 12 are provided with a protective sleeve 2. The side wall of the protective sleeve 2 is provided with a plurality of heat dissipation holes 21. The upper contact arm 11 and the lower contact arm 12 are provided with a conductive rod 3 and are disposed inside the protective sleeve 2. The conductive rod 3 is provided with a sprite-shaped contact 4. The sprite-shaped contact 4 includes a contact piece 41. The back of the contact piece 41 is provided with a heat-conducting plate 5. The heat-conducting plate 5 is provided with a heat dissipation block 6. The heat dissipation block 6 is provided with a plurality of heat dissipation fins 61. The two sides of the heat-conducting plate 5 are provided with elastic parts 51 and clamp and abut against the two sides of the contact piece 41.

[0027] When the conductive rod 3 transmits electrical energy, it causes the plum blossom contact 4 to gradually heat up and transfer the heat to the heat sink 6 through the heat conduction plate 5. After the cold air comes into contact with the heat sink fins 61 and exchanges with them, the air density changes after being heated and rises naturally and is discharged through the heat dissipation hole 21 located above. New cold air is continuously replenished into the protective sleeve 2 from the heat dissipation hole 21 below, thereby forming convection and effectively reducing the temperature of the plum blossom contact 4.

[0028] It is worth mentioning that the plum blossom contact 4 also includes an annular grid plate 42. The annular grid plate 42 has several grooves 421 evenly distributed around the dot as the axis to accommodate the contact plate 41. The annular grid plate 42 provides support for the contact plate 41. The grooves 421 not only serve as a foolproof design, but also prevent the contact plate 41 from shifting left and right.

[0029] It is worth mentioning that the back of the contact piece 41 is provided with a first annular spring 43 and a second annular spring 44 at the top and bottom, which causes the contact piece 41 to contract toward the center of the annular grid plate 42. The first annular spring 43 and the second annular spring 44 make the contact piece 41 tightly clamp the conductive post, reducing the gap and contact resistance value.

[0030] It is worth mentioning that the back of the contact piece 41 is provided with at least two mounting holes 411, which are used in conjunction with the fastening screws 8;

[0031] It is worth mentioning that the elastic part 51 includes a bent energy storage part 52. One end of the energy storage part 52 extends to provide an abutment part 53 and abuts against the side wall of the contact piece 41. The other end of the energy storage part 52 is provided on one side of the heat-conducting plate 5. The energy storage part 52 releases elastic force to make the abutment part 53 tightly abut against the side wall of the spring piece, thereby increasing the contact area between the heat-conducting plate 5 and the contact piece 41, reducing the gap between the two, and improving the heat conduction efficiency.

[0032] It is worth mentioning that the heat-conducting plate and heat sink 6 are provided with threaded holes 7 corresponding to the mounting holes 411. The threaded holes 7 of the heat sink 6 are provided with fastening screws 8 and are threaded to the mounting holes 411. The heat-conducting plate and heat sink 6 are tightly connected to the contact plate 41 by fastening screws 8, which reduces the gaps between the components and improves the heat conduction efficiency.

[0033] It is worth mentioning that the heat sinks 6 are spaced apart from each other, and the heat sinks 6 are made of aluminum. The spacing between the heat sinks 6 prevents the contact plates 41 from interfering with each other when they move.

[0034] The above design scheme can enable the product to achieve the advantages of increased service life and controlled temperature rise.

[0035] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A perforated contact of a high-voltage vacuum circuit breaker, comprising a solid-sealed pole (1), wherein the solid-sealed pole (1) is provided with an upper contact arm (11) and a lower contact arm (12), characterized in that: The upper contact arm (11) and lower contact arm (12) are provided with protective sleeves (2). The side wall of the protective sleeve (2) is provided with several heat dissipation holes (21). The upper contact arm (11) and lower contact arm (12) are provided with conductive rods (3) and are set inside the protective sleeve (2). The conductive rods (3) are provided with stylus contacts (4). The stylus contacts (4) include contact pieces (41). The back of the contact pieces (41) is provided with a heat-conducting plate (5). The heat-conducting plate (5) is provided with heat dissipation blocks (6). The heat dissipation blocks (6) are provided with several heat dissipation fins (61). The heat-conducting plate (5) is provided with elastic parts (51) on both sides and clamps and abuts against both sides of the contact pieces (41).

2. The sprite-shaped contact of the high-voltage vacuum circuit breaker according to claim 1, characterized in that: The plum blossom contact (4) also includes an annular grid plate (42), which has a number of grooves (421) evenly distributed around the dot as the axis to accommodate the contact plate (41).

3. The sprite-shaped contact of the high-voltage vacuum circuit breaker according to claim 2, characterized in that: The back of the contact piece (41) is provided with a first annular spring (43) and a second annular spring (44) at the top and bottom, so that the contact piece (41) retracts towards the center of the annular grid plate (42).

4. The sprite-shaped contact of the high-voltage vacuum circuit breaker according to claim 1, characterized in that: The back of the contact piece (41) is provided with at least two mounting holes (411).

5. The sprite-shaped contact of the high-voltage vacuum circuit breaker according to claim 3, characterized in that: The elastic part (51) includes a curved energy storage part (52), one end of which extends to provide an abutment part (53) and abuts against the side wall of the contact piece (41), and the other end of which is disposed on one side of the heat-conducting plate (5).

6. The sprite-shaped contact of the high-voltage vacuum circuit breaker according to claim 4, characterized in that: The heat-conducting plate and heat sink (6) are provided with threaded holes (7) corresponding to the mounting holes (411). The threaded holes (7) of the heat sink (6) are provided with fastening screws (8) and are threadedly connected to the mounting holes (411).

7. The sprite-shaped contact of the high-voltage vacuum circuit breaker according to any one of claims 2 to 6, characterized in that: The heat sinks (6) are spaced apart from each other, and the heat sinks (6) are made of aluminum.

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