Copper tube busbar heat dissipation structure for 35kv switch cabinet

Abstract

The utility model discloses a copper tube busbar heat dissipation structure for 35kV switch cabinet, include: main busbar is set up with bus chamber contact box through bus chamber upper branch row below main busbar, bus chamber upper branch row upper end is installed in main busbar, and lower end is installed in bus chamber contact box, cable chamber contact box, cable chamber lower branch row upper end is installed in cable chamber contact box, and lower end is installed in mutual inductor copper row lap joint place, bus chamber upper branch row, cable chamber lower branch row adopt seamless red copper pipe bending forming end portion to form heat shrink tube structure, heat shrink tube structure end portion is provided with copper row lap joint surface. Adopt 2500A copper tube busbar, adopt copper pipe bending process, and copper tube row lap joint surface adopts press processing technology, and the embossed processing of electrically conductive contact surface, and the rated carrying capacity is promoted to 2750A (environmental temperature 40 DEG C). Through the test of thermal imager, the highest temperature of pipe body is less than or equal to 68 DEG C when full load operation, and compared with traditional copper row (92 DEG C), it is improved obviously, reduces the copper consumption, reduces copper row width, and increases safety distance.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, specifically to a copper tube busbar heat dissipation structure for 35kV switchgear. Background Technology

[0002] Currently, most existing 35kV switchgear uses copper busbars as conductive busbars, which has the following drawbacks: 1. The copper busbar has a rectangular cross-section, resulting in low material utilization and high cost; 2. The safe distance between the copper busbars of the high-current switchgear is less than 300mm, which does not meet the requirements of the State Grid. 3. Copper busbars rely on natural convection on their surface for heat dissipation, which is not efficient enough.

[0003] Therefore, there is an urgent need for a switch cabinet conductive structure that can reduce material costs, improve heat dissipation performance, and increase the safety distance of the switch cabinet. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the purpose of this utility model is to provide a switch cabinet conductive structure that can reduce material costs, improve heat dissipation performance, and increase safety distance, so as to solve the problems existing in the prior art.

[0005] To achieve the purpose of this utility model, the technical solution adopted is as follows: A copper tube busbar heat dissipation structure for 35kV switchgear includes: A main busbar, with a busbar compartment contact box installed below the main busbar via a branch line on the busbar compartment; The upper end of the branch bar in the busbar compartment is installed on the main busbar, and the lower end is installed on the contact box in the busbar compartment; A cable compartment contact box, with the upper end of the lower branch of the cable compartment installed in the cable compartment contact box and the lower end installed at the copper busbar connection of the current transformer; The upper branch of the busbar compartment and the lower branch of the cable compartment adopt a seamless copper tube bent into a heat shrink tubing structure at the end. The heat shrink tubing structure is provided with a copper busbar overlapping surface at its end. In a preferred embodiment of this utility model, a plurality of mounting holes are provided on the copper busbar lap surface.

[0006] In a preferred embodiment of this utility model, after the copper pipe bar in the switch cabinet cable compartment is installed, the safe distance between phases is not less than 305mm, and the phase spacing is not less than 360mm.

[0007] In a preferred embodiment of this utility model, the copper busbar lap surface is a conductive contact surface with an embossed treatment after a pressing process.

[0008] The beneficial effects of this utility model are as follows: The copper busbar joints are manufactured using a pressing process, with embossed conductive contact surfaces, increasing the rated current carrying capacity to 2750A (ambient temperature 40℃). Thermal imaging testing shows that the maximum temperature of the busbar during full-load operation is ≤68℃, a significant improvement over traditional copper busbars (92℃). Reduced copper usage lowers material costs: copper consumption is reduced by 42%, resulting in an 18% decrease in overall cost. The reduced busbar width allows for increased safety distances to meet the safety requirements of 35kV switchgear. Modular assembly effectively shortens installation time. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the installation of this utility model.

[0010] Figure 2 This is a schematic diagram of the branch row structure of this utility model.

[0011] Figure 3 This is a schematic diagram of the copper pipe bar in the cable compartment of the switch cabinet of this utility model after installation. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, in the following descriptions, well-known structures and technologies have been omitted to avoid unnecessary confusion regarding the concept of this utility model.

[0013] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0014] like Figure 1-3 The diagram shows a copper tube busbar heat dissipation structure for a 35kV switchgear, which includes a main busbar 1 and a busbar compartment contact box 2 installed below the main busbar 1 via a branch busbar 5.

[0015] The upper end of the branch busbar 5 in the busbar compartment is installed on the main busbar 1, and the lower end is installed on the contact box 2 in the busbar compartment.

[0016] It is also equipped with a cable compartment contact box 3, and the upper end of the lower branch of the cable compartment 4 is installed in the cable compartment contact box 3, and the lower end is installed at the overlap of the transformer copper busbar 6; Both the upper branch line 5 in the busbar compartment and the lower branch line 4 in the cable compartment are constructed using seamless copper tubing 100 bent into heat-shrinkable tubing structures 200 at the ends. Copper busbar overlapping surfaces 300 are provided at the ends of the heat-shrinkable tubing structures 200. Several mounting holes 310 are provided on the copper busbar overlapping surfaces 300. The copper busbar overlapping surfaces 300 are embossed conductive contact surfaces created through a pressing process.

[0017] Secure the device by using the mounting hole 310 and fasteners.

[0018] After the copper conduit bars in the switch cabinet cable compartment are installed, the safe distance between phases shall not be less than 305mm, and the distance between phases shall not be less than 360mm.

[0019] In this embodiment, the safe distance between phases after the copper pipe busbars in the switch cabinet cable compartment are installed is 305mm, and the phase spacing is 360mm.

[0020] It adopts a 2500A copper tube busbar, using a copper tube bending process, and the copper tube overlap surface is processed by pressing. The conductive contact surface is embossed, increasing the rated current carrying capacity to 2750A (ambient temperature 40℃). According to thermal imaging testing, the maximum temperature of the tube body during full load operation is ≤68℃, which is a significant improvement compared to traditional copper busbars (92℃), reducing copper usage, reducing the width of the copper busbar, and increasing the safety distance.

[0021] The above shows and describes the basic principles, main features, and advantages of this utility model.

[0022] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of this utility model as defined by the appended claims and their equivalents.

Claims

1. A copper tube busbar heat dissipation structure for a 35kV switchgear, characterized in that, include: A main busbar, with a busbar compartment contact box installed below the main busbar via a branch line on the busbar compartment; The upper end of the branch bar in the busbar compartment is installed on the main busbar, and the lower end is installed on the contact box in the busbar compartment; A cable compartment contact box, with the upper end of the lower branch of the cable compartment installed in the cable compartment contact box and the lower end installed at the copper busbar connection of the current transformer; The upper branch of the busbar compartment and the lower branch of the cable compartment adopt a seamless copper tube bent into a heat shrink tubing structure at the end. The heat shrink tubing structure has a copper busbar overlap surface at its end.

2. The heat dissipation structure for a 35kV switchgear copper tube busbar as described in claim 1, characterized in that, The copper busbar has several mounting holes on its overlapping surface.

3. The heat dissipation structure for a 35kV switchgear copper tube busbar as described in claim 1, characterized in that, After the copper conduit bars in the switch cabinet cable compartment are installed, the safe distance between phases shall not be less than 305mm, and the distance between phases shall not be less than 360mm.

4. The heat dissipation structure for a 35kV switchgear copper busbar as described in claim 1, characterized in that, The copper busbar lap surface is a conductive contact surface with an embossed treatment after the pressing process.

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