Bus duct connector

Abstract

The utility model provides a bus duct connector, belonging to the bus duct connector technical field, the bus duct connector comprises a main body housing, an elastic sheet structure and a conductive contact strip, the main body housing is a tubular structure, the two ends of the main body housing are opened for receiving a bus duct, the elastic sheet structure comprises an outer layer elastic sheet assembly and an inner layer elastic sheet assembly, the main body shell is internally provided with a space for accommodating the inner-layer elastic sheet assembly, the outer-layer elastic sheet assembly is fixed at the periphery of the main body shell and is distributed along the axial direction of the main body shell, the inner-layer elastic sheet assembly is arranged in the main body shell and corresponds to the outer-layer elastic sheet assembly, and the outer-layer elastic sheet assembly is arranged in the main body shell and corresponds to the inner-layer elastic sheet assembly. The conductive contact strip is fixedly installed on the central axis in the main body shell, the conductive contact strip is fixedly connected with the inner-layer elastic sheet assembly through a machine, the inner-layer elastic sheet assembly is connected to the inner wall of the main body shell through an elastic element, and the bus duct connector solves the problem that the electric contact pressure of the bus duct connector is not uniform.

Description

Technical Field

[0001] The utility model belongs to the technical field of bus duct connectors, and in particular relates to a bus duct connector. Background Art

[0002] As an efficient power transmission equipment, bus duct is widely used in power transmission systems, especially in large buildings, factories, data centers and other places. It can provide large-capacity, low-loss power distribution solutions. The bus duct system consists of a closed metal shell wrapped with multiple parallel conductive strips. Compared with traditional cable wiring, the bus duct has the advantages of easy installation, simple maintenance, large current carrying capacity, and good heat dissipation. However, the design and performance of the connector in the bus duct system directly affect the safety and efficiency of the entire system. Traditional bus duct connectors mainly adopt a fixed-size contact structure, and their design is often relatively simple, relying mainly on precise size matching to achieve a close connection with the bus duct.

[0003] Uneven electrical contact pressure is a key problem faced by traditional fixed-structure busbar connectors, which is directly related to the safe operation and energy efficiency of the power system. Specifically, when the electrical contact pressure between the connector and the busbar is not uniform enough, it will trigger a series of chain reactions with far-reaching impacts. First, uneven electrical contact will lead to increased contact resistance. At the contact point where the current passes, if the pressure is insufficient, the air gaps between the microscopic protrusions on the surface of the material will increase. The insulation of air is much higher than that of metal, so this part of the air gap will significantly increase the resistance. In areas with poor local contact, a lot of heat will be generated when the current passes, causing local overheating. This overheating will not only accelerate the aging of the connector material and shorten its service life, but may also cause thermal damage to the surrounding insulating materials and increase the risk of short circuits. Secondly, local overheating is a hotbed for arc discharge. When the temperature of the contact point exceeds a certain threshold, the dielectric strength in the air decreases, ionization is likely to occur, and arcs are formed. Furthermore, the stability and efficiency of current transmission will be significantly reduced. Utility Model Content

[0004] In view of this, the utility model provides a bus duct connector, which solves the problem of uneven electrical contact pressure of a traditional bus duct connector through the design of a spring structure, thereby extending the service life.

[0005] The utility model is achieved in this way:

[0006] The utility model provides a bus duct connector, which includes a main body shell, a spring structure and a conductive contact strip. The main body shell is a tubular structure with openings at both ends for receiving the bus duct. The spring structure includes an outer spring assembly and an inner spring assembly. A space for accommodating the inner spring assembly is provided inside the main body shell. The outer spring assembly is fixed to the outer periphery of the main body shell and is distributed axially along the main body shell. The inner spring assembly is arranged inside the main body shell and corresponds to the outer spring assembly. The conductive contact strip is fixedly installed on the central axis inside the main body shell. The conductive contact strip is mechanically fixed to the inner spring assembly.

[0007] Each spring clip of the outer spring clip assembly is designed with a preset maximum opening angle and rebound force to ensure that the initial width in the unstressed state is slightly larger than the minimum moving radius of the inner spring clip assembly. After the outer spring clip is initially fixed to the bus duct, the inner spring clip assembly is adaptively adjusted according to the actual size of the bus duct, and its maximum moving range is accurately calculated to not exceed the effective coverage width after the outer spring clip is fully expanded, thereby ensuring that there is always enough overlapping area between the inner and outer spring clips to maintain stable initial fixation and final electrical contact pressure balance.

[0008] On the basis of the above technical solution, a bus duct connector of the utility model can also be improved as follows:

[0009] The inner layer spring sheet assembly is connected to the inner wall of the main body shell through an elastic element, one end of the elastic element is fixed to the side surface of the inner layer spring sheet assembly, and the other end is fixed to the inner wall of the main body shell.

[0010] Furthermore, the elastic element is designed as a spiral spring structure.

[0011] Furthermore, the outer layer spring sheet assembly and the main body shell are fixed in a snap-fit ​​or threaded manner.

[0012] Furthermore, the joint between the inner layer spring sheet assembly and the conductive contact strip is achieved by crimping or welding.

[0013] Furthermore, the number of the inner layer spring sheet assemblies is at least two, and they are equidistantly distributed along the axial direction of the main body shell.

[0014] Furthermore, the total width of the outer layer spring fragment assembly is greater than the maximum diameter of the inner layer spring fragment assembly in a free state.

[0015] The structure of the spring refers to the brand characteristics of some stainless steel springs, such as 1Cr17Mn6Ni5N, 1Cr18Mn8Ni5N, 1Cr17Ni7, etc.

[0016] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the total width of the outer layer spring clip assembly is designed to be slightly larger than the maximum diameter of the inner layer spring clip assembly in the free state, so as to ensure that the outer layer spring clip can completely cover the outer edge of the bus duct when initially fixed, and provide the necessary support and positioning functions. The diameter of the inner layer spring clip assembly is designed according to the common size range of the bus duct, ensuring that it can not only cling to the inner wall of the bus duct at the minimum and maximum movement positions, but also maintain appropriate overlap with the outer layer spring clip, and together form a stable electrical contact and physical connection. In addition, the design of the inner and outer layer spring clips ensures that the necessary contact pressure and uniform distribution can be maintained in bus duct applications of different sizes.

[0017] Furthermore, it also includes a limiting mechanism, which is arranged inside the main body shell and is used to limit the movement range of the inner layer spring sheet assembly, wherein the limiting mechanism includes a retaining ring, the elastic element, and a limiting screw.

[0018] The design of the limiting structure is to ensure that the inner spring assembly does not overextend or retract during the adaptive adjustment process, so as to maintain a safe and effective contact range. This structure usually includes but is not limited to the following aspects:

[0019] Built-in retaining ring or stop ring: one or more immovable annular retaining rings are arranged on the inner wall of the main body shell, which match the moving track of the inner layer spring assembly and limit its maximum and minimum extension positions;

[0020] Preload setting of elastic element: Use the preload force and working stroke of the coil spring to indirectly limit the movement range of the inner spring. The compression and extension limit positions of the spring determine the activity range of the spring;

[0021] Adjustable limit screw: An adjustable screw or bolt is set inside the shell, and by matching with the corresponding hole position on the inner spring assembly, tightening the screw can accurately set the maximum extension position of the spring.

[0022] Furthermore, two end portions of the main body shell are provided with chamfers, and the chamfers are designed to be 40° to 50°.

[0023] Furthermore, the spring piece of the inner spring piece assembly is made of copper alloy.

[0024] Compared with the prior art, the bus duct connector provided by the utility model has the following beneficial effects:

[0025] Wide applicability: Through the adaptive adjustment of the inner spring, the connector is compatible with bus ducts of different specifications, reducing inventory pressure and customization costs, and improving the versatility and flexibility of the system;

[0026] Improve current transmission efficiency: The synergistic effect of the inner and outer layers of springs ensures uniform distribution of electrical contact and reduces contact resistance, thereby improving the stability and efficiency of current transmission, avoiding local overheating, and extending the service life of the bus duct and connector;

[0027] Simplified installation and maintenance: The adaptive structural design simplifies the installation steps, reduces the requirements for installation accuracy, and reduces installation time. At the same time, it is easy to quickly replace and maintain, reduces system downtime, and improves overall operation and maintenance efficiency;

[0028] Enhanced electrical safety: Uniform electrical contact pressure reduces the possibility of arcing, improves the electrical safety performance of the bus duct system, and provides reliable protection for high load and long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 This is an example diagram of a bus duct connector;

[0031] Figure 2 It is a side view of a bus duct connector;

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] 10. Main body shell; 20. Shrapnel structure; 21. Outer shrapnel assembly; 22. Inner shrapnel assembly; 221. Elastic element; 30. Conductive contact strip. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the implementation mode of the present invention clearer, the technical solution in the implementation mode of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the implementation mode of the present invention.

[0035] like Figure 1 , Figure 2As shown, it is a first embodiment of a bus duct connector provided by the utility model. In this embodiment, it includes a main shell 10, a spring structure 20 and a conductive contact strip 30. The main shell 10 is a tubular structure with openings at both ends for receiving the bus duct. The spring structure 20 includes an outer spring assembly 21 and an inner spring assembly 22. A space for accommodating the inner spring assembly 22 is provided inside the main shell 10. The outer spring assembly 21 is fixed to the outer periphery of the main shell 10 and is distributed axially along the main shell 10. The inner spring assembly 22 is arranged inside the main shell 10 and corresponds to the outer spring assembly 21. The conductive contact strip 30 is fixedly installed on the central axis inside the main shell 10, and the conductive contact strip 30 is mechanically fixed to the inner spring assembly 22.

[0036] Among them, in the above technical solution, the inner layer spring assembly 22 is connected to the inner wall of the main shell 10 through the elastic element 221, one end of the elastic element 221 is fixed to the side of the inner layer spring assembly 22, and the other end is fixed to the inner wall of the main shell 10.

[0037] When in use, at least one coil spring is fixed or integrated on the back or side of each inner layer spring assembly. One end of the spring is fixed to the inner layer spring assembly, and the other end is fixed to a pre-designed fixed point or a specially designed spring seat on the inner wall of the main body shell. This arrangement makes it possible for the spring to be compressed when the inner layer spring assembly is pushed by the insertion of the bus duct, and then after the spring contacts the bus duct, the restoring force of the spring forces the spring to cling to the inner surface of the bus duct, achieving reliable electrical contact.

[0038] The outer layer of the spring clip assembly is designed as a sheet structure with a certain elasticity, including U-shaped, C-shaped or other three-dimensional forms that can provide initial fixation and alignment functions. This design allows the outer layer of the spring clip to quickly surround the outer wall of the bus duct during installation, and achieves initial stable fixation through the elastic force of the spring clip. The shape design of the inner layer of the spring clip assembly is more complex, aiming to achieve a close fit with the inner surface of the bus duct, and adaptively adjust the contact pressure according to the actual size of the bus duct. The inner layer of the spring clip may be wavy, serrated or have a structure with multiple contact points. This design helps to increase the contact area, disperse the current and reduce the contact resistance. Each inner layer of the spring clip is usually connected to the inner wall of the main shell through an elastic element (such as a coil spring). These springs are located on the back or side of the spring clip to ensure that the spring clip can flexibly move back and forth when it is pushed by the insertion of the bus duct, and adjust its position to adapt to different slot widths.

[0039] One end of the outer spring sheet is connected to the edge of the main body shell or the internal supporting structure by welding, riveting or embedded fixation. The other end of the tilting naturally opens outwards when there is no force. When the bus duct is inserted, this part of the spring sheet is squeezed and elastically deformed to fit closely to the outer surface of the bus duct, thereby achieving fixation and conductive contact.

[0040] Furthermore, in the above technical solution, the elastic element 221 is designed as a spiral spring structure.

[0041] When the connector is assembled to a narrower bus duct, the spring is less compressed and the outward force of the spring assembly is smaller; conversely, for a wider bus duct, the spring is further compressed, providing a greater outward thrust to ensure that the spring is in close contact with the inner wall of the bus duct. This adaptive mechanism ensures uniform pressure distribution and good electrical contact regardless of how the bus duct size changes.

[0042] Furthermore, in the above technical solution, the outer layer spring assembly 21 and the main body shell 10 are fixed in a snap-fit ​​or threaded connection.

[0043] Furthermore, in the above technical solution, the joint between the inner layer spring element assembly 22 and the conductive contact strip 30 is achieved by crimping or welding.

[0044] Furthermore, in the above technical solution, the number of the inner layer spring sheet assemblies 22 is at least two, and they are equidistantly distributed along the axial direction of the main shell 10 .

[0045] Furthermore, in the above technical solution, the total width of the outer layer spring fragment assembly 21 is greater than the maximum diameter of the inner layer spring fragment assembly 22 in a free state.

[0046] Furthermore, in the above technical solution, a limiting mechanism is also included, which is arranged inside the main shell 10 and is used to limit the movement range of the inner layer spring assembly 22, wherein the limiting mechanism includes one of a retaining ring, an elastic element 221, and a limiting screw.

[0047] Furthermore, in the above technical solution, two end portions of the main shell 10 are provided with chamfers, and the chamfers are designed to be 40° to 50°.

[0048] Furthermore, in the above technical solution, the spring material of the inner spring assembly 22 is copper alloy.

[0049] Specifically, the principle of the utility model is:

[0050] Double-layer spring clip design: The outer spring clip assembly provides initial fixation and alignment. The width and preset tension of the spring clip are carefully calculated to ensure that the outer wall of the bus duct can be clamped quickly and firmly during initial installation, creating conditions for the adaptive adjustment of the inner spring clip assembly;

[0051] Adaptive adjustment of the inner spring: The inner spring assembly is connected to the main body shell through a spiral spring. The elastic design of the spring enables the inner spring to automatically adjust its position according to the size of the bus duct when inserted into the bus duct until the best electrical contact state is achieved. This dynamic adjustment mechanism ensures that the electrical contact pressure remains consistent at different widths and depths of the bus duct, thereby effectively distributing the current and reducing the hot spot effect;

[0052] Pressure balance and current distribution: The distribution design of the inner spring follows the electrical contact theory to ensure that the current is evenly distributed at each contact point, avoiding the hot spots that may be generated by traditional fixed contact points. The optimal number, position and elastic parameters of the springs are determined through mathematical model calculations to achieve the best current transmission efficiency and heat dissipation performance.

Claims

1. A bus duct connector, characterized in that: The invention comprises a main body shell (10), a spring sheet structure (20) and a conductive contact strip (30); the main body shell (10) is a tubular structure with two ends opened for receiving a bus duct; the spring sheet structure (20) comprises an outer spring sheet assembly (21) and an inner spring sheet assembly (22); a space for accommodating the inner spring sheet assembly (22) is provided inside the main body shell (10); the outer spring sheet assembly (21) is fixed to the outer periphery of the main body shell (10) and is distributed axially along the main body shell (10); the inner spring sheet assembly (22) is arranged inside the main body shell (10) and corresponds to the outer spring sheet assembly (21); the conductive contact strip (30) is fixedly installed on the central axis inside the main body shell (10); and the conductive contact strip (30) is connected to the inner spring sheet assembly (22) by mechanical fixation.

2. A bus duct connector according to claim 1, characterized in that: The inner layer spring sheet assembly (22) is connected to the inner wall of the main body shell (10) via an elastic element (221); one end of the elastic element (221) is fixed to the side surface of the inner layer spring sheet assembly (22), and the other end is fixed to the inner wall of the main body shell (10).

3. A bus duct connector according to claim 2, characterized in that: The elastic element (221) is designed as a spiral spring structure.

4. A bus duct connector according to claim 3, characterized in that: The outer layer spring sheet assembly (21) and the main body shell (10) are fixed in a snap-fit ​​or threaded manner.

5. A bus duct connector according to claim 4, characterized in that: The connection between the inner layer spring sheet assembly (22) and the conductive contact strip (30) is achieved by crimping or welding.

6. A bus duct connector according to claim 5, characterized in that: The number of the inner layer spring sheet assemblies (22) is at least two, and they are equidistantly distributed along the axial direction of the main body shell (10).

7. A bus duct connector according to claim 6, characterized in that: The total width of the outer layer spring fragment assembly (21) is greater than the maximum diameter of the inner layer spring fragment assembly (22) in a free state.

8. A bus duct connector according to claim 7, characterized in that: It also includes a limiting mechanism, which is arranged inside the main shell (10) and is used to limit the movement range of the inner layer spring sheet assembly (22), wherein the limiting mechanism includes a retaining ring, the elastic element (221), and a limiting screw.

9. A bus duct connector according to claim 8, characterized in that: The two end portions of the main body shell (10) are provided with chamfered designs, and the chamfered designs are 40° to 50°.

10. A bus duct connector according to claim 9, characterized in that: The spring piece material of the inner spring piece assembly (22) is copper alloy.

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