A large-capacity switch cabinet multi-layer composite current-carrying bus connection structure

Abstract

The application discloses a large-capacity switch cabinet multilayer composite current-carrying bus connection structure, relates to the technical field of switch cabinets, and comprises a cabinet body, a heat dissipation mechanism arranged in the cabinet body, wherein the heat dissipation mechanism comprises a heat insulation assembly, a circulating assembly and a connecting assembly; the heat insulation assembly comprises positioning frames fixed to two sides of the cabinet body, the surface of the positioning frame is provided with ventilation openings, and a heat insulation layer is fixedly arranged between the positioning frames; the heat dissipation mechanism is combined by the heat insulation assembly, the circulating assembly and the exhaust fan, and can effectively dissipate the heat generated in the operation process of the large-capacity current-carrying bus. The circulating assembly can continuously absorb internal heat by using a cooling medium, and cooperates with the exhaust fan to form an air circulation heat dissipation path, so that the heat discharge speed of the cabinet body is accelerated, the problem that the heat dissipation efficiency is insufficient due to the fact that the traditional bus structure mainly relies on natural heat dissipation is solved, the equipment can keep a low temperature rise in a high-current operation state, and the overall heat dissipation performance is improved.

Description

Technical Field

[0001] This invention relates to the field of switchgear technology, specifically to a multi-layer composite current-carrying busbar connection structure for a large-capacity switchgear. Background Technology

[0002] A switchgear is an electrical device used for power distribution, control, and protection. It typically contains current-carrying busbars to facilitate high-current transmission between the power source and various functional units. In large-capacity switchgear, to meet higher current load requirements, multiple busbars are usually connected in parallel or in combination to increase current carrying capacity.

[0003] The existing invention patent with publication number CN121076551A discloses a multilayer copper busbar overlapping unit and overlapping structure for a converter cabinet. The multilayer copper busbar overlapping unit includes three overlapping multilayer copper busbars: multilayer copper busbar A, multilayer copper busbar B, and multilayer copper busbar C. One end of multilayer copper busbar A is connected to the power conversion unit of the traction converter, and the other end is bolted to multilayer copper busbar B. Multilayer copper busbar B is then bolted to multilayer copper busbar C. Insulating plates for maintaining electrical clearance are provided on multilayer copper busbar B and multilayer copper busbar C. This invention uses multilayer copper busbars and, through an innovative overlapping method and design of a new overlapping unit, effectively solves the problem of proximity effect affecting the conductivity of copper busbars. Simultaneously, due to the low inductance characteristics of multilayer copper busbars, it can effectively suppress voltage spikes in switching devices, resulting in a more uniform current distribution, increased current carrying capacity, and prevention of excessive local temperature rise in devices.

[0004] Based on the aforementioned existing technologies, current high-capacity switchgear typically employs multiple busbars connected in parallel to increase current-carrying capacity. However, as the number of busbars and current-carrying capacity increase, the busbar arrangement inside the cabinet becomes more dense, easily leading to heat accumulation. First, the small spacing between traditional busbars restricts airflow, making it difficult to dissipate heat generated during operation in a timely manner, resulting in an overall increase in busbar temperature and affecting current-carrying stability. Second, existing busbar structures lack effective thermal insulation design, and heat can easily transfer between multiple or adjacent busbars, causing localized temperature increases and accelerating the aging of insulation materials. Furthermore, busbars are usually electrically connected via bolted overlaps or connecting blocks. Due to contact resistance at the connection points, concentrated heat generation is easily generated, and existing structures cannot effectively dissipate heat at the connection points, easily forming localized high-temperature areas and reducing the long-term reliability of the switchgear. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a multi-layer composite current-carrying busbar connection structure for large-capacity switchgear. This structure solves the problems of limited air circulation space, difficulty in timely dissipation of heat generated during operation leading to excessive overall temperature rise, lack of effective isolation structure between adjacent busbars causing easy heat transfer and resulting in localized temperature accumulation, and high contact resistance at traditional busbar connection locations, which easily leads to localized heating when current passes through.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-strand tensile strength testing device for composite polyester filament processing, comprising a cabinet, wherein a heat dissipation mechanism is provided inside the cabinet, and the heat dissipation mechanism includes a heat insulation component, a circulation component, and a connecting component; The heat insulation component includes positioning frames fixed to both sides of the cabinet. The surface of the positioning frames is provided with ventilation openings. A heat insulation layer is fixedly arranged between the positioning frames. A traveling tube is arranged inside the heat insulation layer. An exhaust fan is fixedly arranged inside the positioning frames. The circulation component is located on the outside of the cabinet and is used to deliver cooling medium into the traveling tube. The connection component is located inside the cabinet and is used to realize current transmission.

[0007] Preferably, the circulation component includes a positioning plate fixed to the back of the cabinet, a servo motor fixedly mounted on the outer side of the positioning plate, the output end of the servo motor connected to a gear pump, the gear pump fixed to the outer side of the positioning plate, and the output end of the gear pump connected to a connecting pipe, which communicates with the traveling pipe.

[0008] Preferably, a drain pipe is connected to one side of the heat insulation layer. The drain pipe is connected to the traveling pipe, so that the cooling medium delivered by the gear pump can flow along the traveling pipe and be discharged through the drain pipe to achieve circulating heat dissipation.

[0009] Preferably, the connecting component includes an aluminum base layer disposed inside the cabinet, copper layers disposed on both sides of the aluminum base layer, and a sub-bar connected to one side of the copper layer, wherein the aluminum base layer and the copper layer together form a composite current-carrying structure.

[0010] Preferably, the connecting components are provided in multiple sets, and the multiple sets of connecting components are distributed in layers along the inside of the cabinet, so that multiple aluminum base layers and copper layers form a multi-layer composite current-carrying structure to improve the current transmission capability.

[0011] Preferably, the copper layer covers the outside of the aluminum base layer, the aluminum base layer is used to improve the structural strength of the connecting components, and the copper layer is used to reduce resistance loss during current transmission.

[0012] Preferably, the heat insulation layer is disposed on the outside of the connecting component. The heat insulation layer is used to reduce the heat generated during the operation of the connecting component from spreading into the cabinet, and at the same time, the temperature of the connecting component is reduced by the cooling medium inside the traveling pipe.

[0013] Preferably, the exhaust fan is arranged corresponding to the ventilation opening. When the exhaust fan is running, it drives the air inside the cabinet to flow, so that the heat inside the cabinet is discharged through the ventilation opening, and works with the circulation component to reduce the overall temperature rise of the heat dissipation mechanism.

[0014] Beneficial effects This invention provides a multi-layer composite current-carrying busbar connection structure for high-capacity switchgear. Compared with the prior art, it has the following advantages: 1. This high-capacity switchgear features a multi-layer composite current-carrying busbar connection structure. Through a combination of heat insulation components, circulation components, and exhaust fans, it effectively dissipates the heat generated during the operation of the high-capacity current-carrying busbar. The circulation components continuously absorb internal heat using a cooling medium, and together with the exhaust fans, form an air circulation cooling path, accelerating the removal of heat from the cabinet. This addresses the problem of insufficient heat dissipation efficiency caused by traditional busbar structures relying primarily on natural heat dissipation, enabling the equipment to maintain a low temperature rise under high-current operation and improving overall heat dissipation performance. 2. This high-capacity switchgear features a multi-layer composite current-carrying busbar connection structure. By employing a composite current-carrying structure composed of an aluminum base layer and a copper layer, it ensures current transmission capacity while improving the overall heat transfer capacity of the structure. This allows heat generated during operation to dissipate more evenly, reducing localized heating caused by current concentration or resistance in the connection area. Furthermore, combined with an insulation layer and a circulating cooling structure, it further reduces temperature accumulation at the connection points, improving the stability and reliability of the busbar connection structure. 3. The multi-layer composite current-carrying busbar connection structure of this large-capacity switchgear restricts the heat propagation path through the insulation layer, reducing the impact of high-temperature areas on other internal structures and minimizing performance degradation of internal components caused by prolonged high-temperature environments. Simultaneously, the circulation components continuously regulate the heat generated during operation, ensuring the switchgear maintains a stable operating temperature under high-capacity, long-term working conditions. This reduces the likelihood of equipment failure due to excessive temperature rise and extends the overall service life of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the exhaust fan installation structure of the present invention.

[0016] Figure 3 This is a schematic diagram of the gear pump mounting structure of the present invention.

[0017] Figure 4 This is a schematic diagram of the aluminum base installation structure of the present invention.

[0018] Figure 5 This is a schematic diagram of the sub-row and insulation layer structure of the present invention.

[0019] In the diagram: 1. Cabinet; 2. Heat dissipation mechanism; 21. Insulation component; 211. Positioning frame; 212. Ventilation opening; 213. Insulation layer; 214. Traveling pipe; 215. Exhaust fan; 22. Circulation component; 221. Positioning plate; 222. Servo motor; 223. Gear pump; 224. Connecting pipe; 225. Drain pipe; 23. Connecting component; 231. Aluminum base layer; 232. Copper layer; 233. Sub-bar. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1 - Figure 5 The present invention provides a technical solution: A multi-layer composite current-carrying busbar connection structure for a large-capacity switchgear includes a cabinet 1. The cabinet 1 has an internal heat dissipation mechanism 2, which includes a heat insulation component 21, a circulation component 22, and a connection component 23. The heat insulation component 21 is installed inside the cabinet 1, including positioning frames 211 fixed on both sides of the cabinet 1. The surface of the positioning frame 211 is provided with ventilation openings 212. A heat insulation layer 213 is fixedly installed between the two positioning frames 211. A traveling pipe 214 is installed inside the heat insulation layer 213. An exhaust fan 215 is fixedly installed on the inner side of the positioning frame 211.

[0022] The heat insulation component 21 is fixed inside the cabinet 1 by the positioning bracket 211, so that the heat insulation layer 213 can be located in the heat concentration area inside the cabinet 1. The heat insulation layer 213 blocks heat and reduces the diffusion of heat generated by the connecting component 23 to other areas of the cabinet 1 during operation. At the same time, the accompanying pipe 214 installed inside the heat insulation layer 213 can supply cooling medium to flow and cool the area near the heat insulation layer 213.

[0023] Specifically, after the exhaust fan 215 is started, it drives the airflow inside the cabinet 1, causing the hot air generated inside the cabinet 1 to be discharged along the vent 212, thereby improving the air exchange efficiency inside the cabinet 1; at the same time, the heat insulation layer 213 reduces the heat transfer speed, preventing the high temperature area from continuously affecting other internal structures of the cabinet 1, and improving heat dissipation stability.

[0024] The circulation component 22 is located on the outside of the cabinet 1 and includes a positioning plate 221 fixed to the back of the cabinet 1. A servo motor 222 is fixedly installed on the outside of the positioning plate 221. The output end of the servo motor 222 is connected to a gear pump 223. The gear pump 223 is fixed on the outside of the positioning plate 221. The output end of the gear pump 223 is connected to a connecting pipe 224. The connecting pipe 224 is connected to a traveling pipe 214 inside the insulation layer 213. A drain pipe 225 is connected to one side of the insulation layer 213.

[0025] The circulation component 22 drives the gear pump 223 via the servo motor 222, enabling the cooling medium to circulate within the accompanying tube 214. The connecting pipe 224 is used to deliver the cooling medium output from the gear pump 223 into the accompanying tube 214, and the drain pipe 225 is used to discharge the cooling medium after heat absorption, ensuring the cooling process continues.

[0026] Specifically, the servo motor 222 drives the gear pump 223 to work. The cooling medium enters the traveling pipe 214 through the connecting pipe 224 and absorbs the heat generated in the insulation layer 213 and inside the cabinet 1 during the flow process. Then it is discharged through the drain pipe 225 to achieve circulating heat dissipation, thereby reducing the overall temperature inside the cabinet 1. The connecting component 23 is located inside the cabinet 1 and includes an aluminum base 231. Copper layers 232 are respectively provided on both sides of the aluminum base 231. A sub-bar 233 is connected to one side of the copper layer 232. The aluminum base 231 and the copper layer 232 together form a composite current-carrying structure.

[0027] The connecting component 23 forms a composite current-carrying structure through an aluminum base layer 231 and a copper layer 232. The copper layer 232 is used for current transmission and reduces resistance loss when current passes through it. The aluminum base layer 231 is used to improve the overall structural strength and assist in heat transfer. Multiple connecting components 23 can be arranged in layers according to the internal space of the cabinet 1 to improve the current-carrying capacity per unit space.

[0028] Specifically, current is transmitted to the sub-bar 233 through the copper layer 232. The low resistance of the copper layer 232 reduces energy loss during operation. At the same time, the aluminum base layer 231 absorbs some of the heat generated during the operation of the connection assembly 23 and transfers the heat outward. This allows the connection assembly 23 to meet the requirements of high-capacity current transmission while reducing the temperature rise of the connection area and improving long-term operational reliability. Furthermore, any content not described in detail in this specification is prior art known to those skilled in the art.

[0029] During operation, the connecting component 23 is installed inside the cabinet 1, forming a composite current-carrying structure with the copper layer 232 and the aluminum base layer 231 to achieve high-capacity current transmission. The copper layer 232, as the main conductive part, reduces resistance loss during current transmission and decreases heat generated during operation. The aluminum base layer 231, while improving the overall support strength of the connecting component 23, also assists in heat transfer, allowing the heat generated by the connecting component 23 to diffuse outwards more evenly and reducing local temperature rise.

[0030] When the cabinet 1 is under heavy load, the connecting component 23 continuously transmits current and generates heat. The generated heat is transferred outward through the aluminum base layer 231 and gradually diffuses to the area where the heat insulation component 21 is located. At this time, the heat insulation layer 213 can block the heat transmission, reduce the speed at which heat diffuses to other areas inside the cabinet 1, and reduce the impact of the high temperature environment on the internal structure of the cabinet 1.

[0031] During the heat dissipation process, the circulation component 22 is activated, and the servo motor 222 drives the gear pump 223 to run, allowing the external cooling medium to enter the interior of the accompanying pipe 214 through the connecting pipe 224. As the cooling medium flows along the accompanying pipe 214, it exchanges heat with the insulation layer 213 and its surrounding area, absorbs the heat generated during the operation of the connecting component 23, and is discharged through the drain pipe 225, thus realizing the circulation of the cooling medium and keeping the internal temperature of the cabinet 1 stable.

[0032] Simultaneously, the exhaust fan 215 starts, driving airflow inside the cabinet 1 through the vent 212, rapidly expelling the hot air accumulated inside the cabinet 1 and improving air exchange efficiency. The air cooling path formed by the exhaust fan 215 works in conjunction with the liquid cooling path formed by the circulation component 22 to comprehensively cool the connecting component 23 and the internal environment of the cabinet 1.

[0033] Through the above process, the copper layer 232 and the aluminum base layer 231 ensure stable transmission of high current, the heat insulation layer 213 reduces the impact of heat diffusion, the traveling pipe 214 works with the circulation component 22 to continuously absorb heat, and the exhaust fan 215 assists in dissipating internal heat, thereby reducing the overall temperature rise during the operation of the large-capacity switchgear and improving the safety and reliability of the equipment during long-term operation.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-layer composite current-carrying busbar connection structure for a large-capacity switchgear, comprising a cabinet (1), characterized in that: The cabinet (1) is equipped with a heat dissipation mechanism (2), which includes a heat insulation component (21), a circulation component (22), and a connection component (23). The heat insulation component (21) includes positioning frames (211) fixed on both sides of the cabinet (1). Ventilation openings (212) are provided on the surface of the positioning frames (211). A heat insulation layer (213) is fixedly provided between the positioning frames (211). A traveling pipe (214) is provided inside the heat insulation layer (213). An exhaust fan (215) is fixedly provided on the inner side of the positioning frames (211). The circulation component (22) is located on the outside of the cabinet (1) and is used to deliver cooling medium into the traveling tube (214); The connection component (23) is disposed inside the cabinet (1) and is used to realize current transmission.

2. The multi-layer composite current-carrying busbar connection structure for a large-capacity switchgear according to claim 1, characterized in that: The circulation component (22) includes a positioning plate (221) fixed to the back of the cabinet (1). A servo motor (222) is fixedly installed on the outside of the positioning plate (221). The output end of the servo motor (222) is connected to a gear pump (223). The gear pump (223) is fixed to the outside of the positioning plate (221). The output end of the gear pump (223) is connected to a connecting pipe (224). The connecting pipe (224) is connected to the traveling pipe (214).

3. The multi-layer composite current-carrying busbar connection structure for a large-capacity switchgear according to claim 2, characterized in that: One side of the heat insulation layer (213) is connected to a drain pipe (225), which is connected to the traveling pipe (214) so ​​that the cooling medium delivered by the gear pump (223) can flow along the traveling pipe (214) and be discharged through the drain pipe (225) to achieve circulating heat dissipation.

4. The multi-layer composite current-carrying busbar connection structure for a large-capacity switchgear according to claim 1, characterized in that: The connecting component (23) includes an aluminum base layer (231) disposed inside the cabinet (1), and copper layers (232) are respectively disposed on both sides of the aluminum base layer (231). A sub-bar (233) is connected to one side of the copper layer (232). The aluminum base layer (231) and the copper layer (232) together form a composite current-carrying structure.

5. The multi-layer composite current-carrying busbar connection structure for a large-capacity switchgear according to claim 4, characterized in that: The connection component (23) is provided in multiple sets, and the multiple sets of the connection component (23) are distributed in layers along the inside of the cabinet (1), so that multiple aluminum base layers (231) and copper layers (232) form a multi-layer composite current-carrying structure to improve the current transmission capability.

6. The multi-layer composite current-carrying busbar connection structure for a large-capacity switchgear according to claim 4, characterized in that: The copper layer (232) covers the outside of the aluminum base layer (231), the aluminum base layer (231) is used to improve the structural strength of the connecting component (23), and the copper layer (232) is used to reduce the resistance loss during current transmission.

7. The multi-layer composite current-carrying busbar connection structure for a large-capacity switchgear according to claim 1, characterized in that: The heat insulation layer (213) is disposed on the outside of the connecting component (23). The heat insulation layer (213) is used to reduce the heat generated by the connecting component (23) during operation and diffuse into the cabinet (1). At the same time, the temperature of the connecting component (23) is reduced by the cooling medium inside the traveling pipe (214).

8. The multi-layer composite current-carrying busbar connection structure for a large-capacity switchgear according to claim 1, characterized in that: The exhaust fan (215) is set in correspondence with the ventilation port (212). When the exhaust fan (215) is running, it drives the air inside the cabinet (1) to flow, so that the heat inside the cabinet (1) is discharged through the ventilation port (212) and works with the circulation component (22) to reduce the overall temperature rise of the heat dissipation mechanism (2).

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