Lap joint structure for close contact of buses

Abstract

The utility model provides a lap joint structure for close contact of buses, and belongs to the technical field of electrical equipment. Comprising a shell, a bus I and a bus II are installed in the shell, the bus I and the bus II make close contact through a zigzag contact structure, the back faces of the bus I and the bus II are pressed through elastic pressing structures, heat dissipation plates are arranged on the back faces of the bus I and the bus II, and an insulation plate is arranged on the inner surface of the shell. According to the utility model, by optimizing the design and the fixing mode of the bus lap joint contact surface, the close contact at the bus joint is ensured, the contact resistance is reduced, and the reliability and the safety of electrical connection are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electrical equipment, more particularly to a lap joint structure for busbar close contact, which is suitable for busbar connection in high-low voltage distribution cabinet, transformer, switchgear and other electrical equipment. BACKGROUND

[0002] The busbar is an important component for transmitting electric energy in the power system, and its connection quality directly affects the safety and stability of the system. The traditional busbar lap joint structure usually adopts bolt fixing mode, but due to machining error, improper installation or thermal expansion and contraction in long-term operation, it is easy to cause the contact surface to loosen and the contact resistance to increase, thereby causing a series of problems such as local overheating and even failure. Therefore, a new type of busbar lap joint structure is urgently needed to solve the above problems. SUMMARY

[0003] The utility model solves the technical problem: provide a lap joint structure for busbar close contact, the purpose lies in through optimizing busbar lap joint contact surface design and fixed mode, ensure the close contact of busbar connection, reduce the contact resistance, improve the reliability and safety of electrical connection.

[0004] To achieve the above purpose, the utility model adopts the technical scheme of:

[0005] A lap joint structure for busbar close contact, comprising a shell, the shell is internally installed with busbar I and busbar II, the busbar I and the busbar II are closely contacted through the sawtooth contact structure, the back of the busbar I and the busbar II is compressed through the elastic compression structure, the back of the busbar I and the busbar II is equipped with a heat sink, and the inner surface of the shell is equipped with an insulating plate.

[0006] Further limitation of the above scheme, the sawtooth contact structure includes the busbar I sawtooth surface provided on the front of the busbar I and the busbar II sawtooth surface provided on the front of the busbar II, the sawtooth parameters of the busbar I sawtooth surface and the busbar II sawtooth surface are the same and ensure that the two are closely contacted.

[0007] Further limitation of the above scheme, the sawtooth depth of the busbar I sawtooth surface and the busbar II sawtooth surface is 0.5-1mm, and the interval is 2-3mm.

[0008] Further limitation of the above scheme, the elastic compression structure includes bolt mounting bracket, compression bolt, spring and pressing plate, the bolt mounting bracket is U-shaped structure and is fixed on the inner side of the shell, the bolt mounting bracket is provided with a nut, the compression bolt is screwed with the nut, the compression bolt is fixedly connected with the pressing plate at the lower part, the pressing plate is compressed on the corresponding busbar I or busbar II by rotating the compression bolt, the spring is sleeved on the compression bolt between the pressing plate and the bolt mounting bracket, and the anti-loosening nut is screwed on the upper part of the compression bolt.

[0009] Further, the surface of the lock nut is coated with anti-loosening glue and is equipped with an anti-loosening washer.

[0010] Further, the heat dissipation plate is provided with a plurality of heat dissipation fins on one side, and a plurality of contact protrusions are uniformly arranged on the other side; the back surface of the busbar I and the busbar II is provided with a plurality of contact grooves matched with the contact protrusions; and the heat dissipation plate is fixed on the corresponding busbar I or busbar II through fixing screws.

[0011] Further, the heat dissipation plate is made of aluminum material.

[0012] Further, the housing is provided with a mounting and maintenance opening corresponding to the position of the elastic compression structure, and the mounting and maintenance opening is covered by an insulating cover plate.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] 1. The sawtooth contact structure is used to connect the contact surfaces of the two busbars, thereby significantly increasing the contact area and reducing the contact resistance.

[0015] 2. The elastic compression structure is used to compress the two busbars together, thereby ensuring that the contact surfaces of the busbars are always tightly attached and avoiding loosening.

[0016] 3. The spring and the lock nut are arranged on the compression bolt of the elastic compression structure, thereby improving the reliability of the connection, adapting to the vibration and thermal expansion and contraction environment, and preventing loosening.

[0017] 4. The insulating protection treatment and the structural improvement of the heat dissipation plate enhance the safety and heat dissipation performance of the busbar lap joint.

[0018] 5. The overall structure of the utility model is simple and convenient to install, and is suitable for busbar connection of various specifications. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the local enlarged structure of the heat dissipation plate in the utility model. DETAILED DESCRIPTION

[0021] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0022] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0023] It should be noted that in this paper, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations. The element defined by the sentence "includes a..." does not exclude the presence of another identical element in the process, method, article or device including the element.

[0024] Please refer to Figures 1-2 for detailed description of the embodiments of the present application.

[0025] Embodiment 1: a lap joint structure for busbar close contact, as shown in Figure 1 , including a shell 1, the shell 1 is internally mounted with busbar I 2 and busbar II 3, the busbar I 2 and busbar II 3 are closely contacted through the sawtooth contact structure 4, the back of the busbar I 2 and the busbar II 3 are all pressed through the elastic pressing structure 7, the back of the busbar I 2 and the busbar II 3 are all provided with heat dissipation plates 13, and the inner surface of the shell 1 is provided with an insulating plate 18.

[0026] Specifically, the sawtooth contact structure 4 includes a busbar I sawtooth surface 5 provided on the front of the busbar I 2 and a busbar II sawtooth surface 6 provided on the front of the busbar II 3, the sawtooth parameters of the busbar I sawtooth surface 5 and the busbar II sawtooth surface 6 are the same and ensure that the two are in close contact.

[0027] Preferably, the sawtooth depth of the busbar I sawtooth surface 5 and the busbar II sawtooth surface 6 is 0.5-1mm, and the pitch is 2-3mm.

[0028] In this embodiment, the contact surfaces of the two busbars are in zigzag contact, which can significantly increase the contact area and reduce the contact resistance.

[0029] Embodiment 2: This embodiment is a further improvement based on embodiment 1, which is specifically described with reference to Figure 1 As shown in the figure, the elastic compression structure 7 includes a bolt mounting bracket 8, a compression bolt 9, a spring 10 and a compression plate 11. The bolt mounting bracket 8 is a U-shaped structure and is fixed on the inner side of the shell 1. The bolt mounting bracket 8 is provided with a nut. The compression bolt 9 is screwed with the nut. The lower part of the compression bolt 9 is fixedly connected with the compression plate 11. The compression plate 11 is compressed on the corresponding busbar 2 or busbar 3 by rotating the compression bolt 9. The spring 10 is sleeved on the compression bolt 9 between the compression plate 11 and the bolt mounting bracket 8. The upper part of the compression bolt 9 is screwed with a lock nut 12.

[0030] Preferably, the compression plate 11 is made of copper alloy material. The spring 10 is made of stainless steel material, and the elastic force can be adjusted according to the size of the busbar and the size of the current. The surface of the lock nut 12 is coated with anti-loosening glue and is equipped with an anti-loosening washer.

[0031] In this embodiment, the elastic compression structure is used to compress the two busbars together, which ensures that the contact surface of the busbar is always tightly fitted and avoids loosening.

[0032] At the same time, in this embodiment, the spring and the lock nut are arranged on the compression bolt of the elastic compression structure, which improves the reliability of the connection and adapts to the vibration and thermal expansion and contraction environment.

[0033] Embodiment 3: This embodiment is a further improvement based on embodiment 1, which is specifically described with reference to Figure 2 As shown in the figure, the heat dissipation plate 13 is provided with a plurality of heat dissipation fins 14 on one side. A plurality of contact protrusions 15 are uniformly arranged on the other side of the heat dissipation plate 13. The back surface of the busbar 2 and the busbar 3 is provided with a plurality of contact grooves 16 matched with the contact protrusions 15. The heat dissipation plate 13 is fixed on the corresponding busbar 2 or busbar 3 by a fixing screw 17.

[0034] Preferably, the heat dissipation plate 13 is made of aluminum material as a whole.

[0035] In this embodiment, the structure of the heat dissipation plate is improved, which enhances the safety and heat dissipation performance of the busbar lap joint and avoids local overheating.

[0036] Embodiment 4: This embodiment is a further improvement based on embodiment 1, which is specifically described with reference to Figure 1 As shown in the figure, the shell 1 is provided with an installation and maintenance opening 19 corresponding to the position of the elastic compression structure 7. The installation and maintenance opening 19 is covered by an insulating cover plate 20.

[0037] Preferably, the insulating plate 18 and the insulating cover plate 20 can be made of silicone rubber material, which has good insulation and high temperature resistance, preventing short circuit and arc discharge.

[0038] In the embodiment, the elastic pressing structure is installed through the installation and maintenance opening, and installation and maintenance are facilitated.

[0039] The utility model discloses simple whole structure, convenient installation is applicable to various specifications bus connection.

[0040] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the scope of the claims.

[0041] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A lap joint structure for close contact of busbars, comprising an outer shell (1), characterized in that: The shell (1) is internally provided with busbar I (2) and busbar II (3), the busbar I (2) and busbar II (3) are in close contact through the zigzag contact structure (4), the back of the busbar I (2) and busbar II (3) is pressed through the elastic pressing structure (7), and the back of the busbar I (2) and busbar II (3) is provided with a heat dissipation plate (13).

2. The lap joint structure for the close contact of busbars according to claim 1, characterized in that: The zigzag contact structure (4) comprises a busbar I zigzag surface (5) arranged on the front surface of the busbar I (2) and a busbar II zigzag surface (6) arranged on the front surface of the busbar II (3), and the zigzag parameters of the busbar I zigzag surface (5) and the busbar II zigzag surface (6) are the same and ensure that the two are in close contact.

3. The lap joint structure for the close contact of busbars according to claim 2, characterized in that: The zigzag depth of the busbar I zigzag surface (5) and the busbar II zigzag surface (6) is 0.5-1mm, and the interval is 2-3mm.

4. The lap joint structure for the close contact of busbars according to claim 1, characterized by: The elastic pressing structure (7) comprises a bolt mounting bracket (8), a pressing bolt (9), a spring (10) and a pressing plate (11), the bolt mounting bracket (8) is a U-shaped structure and is fixed on the inner side of the shell (1), the bolt mounting bracket (8) is provided with a nut, the pressing bolt (9) is screwed with the nut, the lower part of the pressing bolt (9) is fixedly connected with the pressing plate (11), the pressing plate (11) is pressed on the corresponding busbar I (2) or busbar II (3) by rotating the pressing bolt (9), the spring (10) is sleeved on the pressing bolt (9) between the pressing plate (11) and the bolt mounting bracket (8), and the upper part of the pressing bolt (9) is screwed with a lock nut (12).

5. The lap joint structure for the close contact of busbars according to claim 4, characterized in that: The surface of the lock nut (12) is coated with lock glue and is provided with a lock washer.

6. The lap joint structure for the close contact of busbars according to claim 1, characterized by: The heat dissipation plate (13) is provided with a plurality of heat dissipation fins (14) on one side, a plurality of contact protrusions (15) are uniformly arranged on the other side of the heat dissipation plate (13), a plurality of contact grooves (16) matched with the contact protrusions (15) are arranged on the back of the busbar I (2) and the busbar II (3), and the heat dissipation plate (13) is fixed on the corresponding busbar I (2) or busbar II (3) through fixing screws (17).

7. The lap joint structure for the close contact of busbars according to claim 6, characterized by: The heat dissipation plate (13) is made of aluminum material.

8. The lap joint structure for the close contact of busbars according to claim 1, characterized by: The shell (1) is provided with a mounting and maintenance opening (19) corresponding to the position of the elastic pressing structure (7), and the mounting and maintenance opening (19) is covered by an insulating cover plate (20).

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