Double heat dissipation and arc prevention isolation structure of terminal in switch cabinet

Abstract

The utility model discloses a double heat dissipation and anti -electric arc isolation structure of switch board inner connecting terminal relates to switch board technical field. The utility model discloses a terminal main part, heat dissipation structure and anti -electric arc isolation structure, and terminal main part includes electrically conductive connecting portion and insulating installation part, and heat dissipation structure includes first heat dissipation subassembly and second heat dissipation subassembly, and anti -electric arc isolation structure includes isolation cover and insulating baffle, first heat dissipation subassembly sets up in terminal main part outside, and includes a plurality of heat dissipation fin, and second heat dissipation subassembly includes heat dissipation channel and heat dissipation fan. The utility model discloses the combination of passive heat dissipation and active heat dissipation through setting, can expand natural heat dissipation capacity through fin, can solve internal heat accumulation problem under high load through channel and fan, through setting anti -electric arc isolation design, avoid the interference of electric arc to adjacent component, reduce fire, short circuit risk, strengthen the structural strength of isolation cover again, promote the anti -electric arc impact ability, further guarantee the security of switch board operation.

Description

Technical Field

[0001] This utility model relates to the field of switch cabinet technology, specifically to a dual heat dissipation and arc-proof isolation structure for the internal connection terminals of a switch cabinet. Background Technology

[0002] Switchgear is an important electrical device in power systems, used to control, protect, and monitor power circuits. As a key component of electrical connections within the switchgear, the performance of the connection terminals directly affects the safe and stable operation of the entire system. During operation, connection terminals generate a certain amount of heat. If the heat cannot be dissipated in time, it will cause the terminal temperature to rise, affecting conductivity and even causing safety accidents.

[0003] Chinese Patent Publication No. 216903373U discloses a connecting terminal including a male terminal and a female terminal. The male terminal includes a flat portion, which includes at least one first protrusion. The flat portion includes a first surface and a second surface disposed opposite to the first surface, with the at least one first protrusion disposed on the second surface. The female terminal includes a main body portion, which includes a third surface opposite to the second surface. The third surface has at least one groove, and the second surface abuts against the third surface. The first protrusion and the groove are interference-fitted. This connecting terminal offers strong safety and applicability, and helps avoid potential hazards such as high resistance temperature rise and electric arc sparks.

[0004] Although the design improves the reliability of initial contact through interference fit, the heat dissipation effect is limited and cannot meet the heat dissipation requirements under high power and high load environments, which can easily lead to heat accumulation. In terms of arc protection, relying solely on simple insulation isolation cannot effectively limit the arc to a certain range, resulting in poor arc protection and failing to solve the core problem affecting components.

[0005] In view of this, this utility model is hereby proposed. Utility Model Content

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A dual heat dissipation and arc-proof isolation structure for connection terminals inside a switch cabinet includes: a terminal body, a heat dissipation structure, and an arc-proof isolation structure. The terminal body includes a conductive connection part and an insulating mounting part. The heat dissipation structure includes a first heat dissipation component and a second heat dissipation component. The arc-proof isolation structure includes an isolation cover and an insulating partition. The first heat dissipation component is disposed on the outside of the terminal body and includes multiple heat dissipation fins. The second heat dissipation component includes a heat dissipation channel and a cooling fan. The heat dissipation channel is cylindrical and penetrates the interior of the terminal body. The cooling fan is installed at the end of the heat dissipation channel.

[0008] Optionally, the heat dissipation fins are made of aluminum, are evenly distributed along the length of the terminal body, and are tightly attached to the surface of the terminal body.

[0009] Optionally, the heat dissipation channel extends through the conductive connection part and the insulating mounting part, and has a circular cross-sectional shape.

[0010] Optionally, the arc-proof isolation structure includes an isolation cover and an insulating partition, with the isolation cover connected to the terminal body via a fixing block.

[0011] Optionally, an insulating partition is installed between the isolation cover and the terminal body. The insulating partition is made of polytetrafluoroethylene and is fitted to the inner wall of the isolation cover.

[0012] Optionally, the conductive connection part is cylindrical for wire connection, and the insulating mounting part is cubic and fixed to the inner wall of the switch cabinet by bolts.

[0013] Optionally, the arc-shaped protrusions on the inner wall of the isolation cover are evenly distributed circumferentially, and the cross-section of the protrusions is arc-shaped.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0015] 1. Dual Synergistic Advantages: Combining passive and active heat dissipation, it can both expand the natural heat dissipation capacity through fins and solve the problem of internal heat accumulation under high load through channels and fans, avoiding faults such as insulation aging and increased contact resistance caused by overheating, and significantly improving the stability and service life of terminals under long-term high load conditions.

[0016] 2. Arc-proof isolation design to prevent arc from burning or interfering with adjacent components, reducing the risk of fire and short circuit. The arc-shaped protrusions on the inner wall of the isolation cover are distributed circumferentially, which can reduce the energy of the arc by changing the arc path and extending the arc length. At the same time, it enhances the structural strength of the isolation cover, improves the resistance to arc impact, and further ensures the safety of switchgear operation.

[0017] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure;

[0020] Figure 2 This is a schematic diagram of the main structure of the terminal;

[0021] Figure 3 Schematic diagram of the cross-section of the arc-proof isolation structure;

[0022] Figure 4 This is a schematic diagram of the second heat dissipation component.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Terminal body; 101. Conductive connection part; 102. Insulating mounting part; 103. Bolt; 2. Heat dissipation structure; 21. First heat dissipation component; 211. Heat dissipation fins; 22. Second heat dissipation component; 221. Heat dissipation channel; 222. Heat dissipation fan; 3. Arc protection isolation structure; 31. Isolation cover; 311. Arc-shaped protrusion; 312. Fixing block; 32. Insulating partition.

[0025] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings.

[0027] Please see Figure 1-4 As shown, this embodiment provides a dual heat dissipation and arc-proof isolation structure 3 for connecting terminals inside a switch cabinet, including: a terminal body 1, a heat dissipation structure 2, and an arc-proof isolation structure 3. The terminal body 1 includes a conductive connection part 101 and an insulating mounting part. The heat dissipation structure 2 includes a first heat dissipation component 21 and a second heat dissipation component 22. The arc-proof isolation structure 3 includes an isolation cover 31 and an insulating partition 32. The first heat dissipation component 21 is disposed on the outside of the terminal body 1 and includes multiple heat dissipation fins 211. The second heat dissipation component 22 includes a heat dissipation channel 221 and a cooling fan 222. The heat dissipation channel 221 is a cylinder that penetrates the interior of the terminal body 1, and the cooling fan 222 is installed at the end of the heat dissipation channel 221.

[0028] The conductive connection part 101 is a columnar structure made of copper alloy, with a tin-plated surface to reduce contact resistance. One end has a wire crimping hole, and the other end is fixedly connected to the insulating mounting part. The conductive connection part 101 is used to connect to the wire via bolts 102 and 103 for crimping or cold-pressing terminals. The insulating mounting part is a cubic structure molded from epoxy resin, with mounting screw holes on the bottom surface. It is fixed to the mounting bracket of the switch cabinet via bolts 102 and 103. The insulating mounting part has a pre-embedded metal insert, which is integrally molded with the conductive connection part 101 through injection molding to ensure mechanical strength and insulation performance. The heat dissipation mechanism adopts a dual heat dissipation design of external fins and internal air ducts, including a first heat dissipation component 21. The heat dissipation fins 211 are made of aluminum alloy extrusion molding and are evenly distributed circumferentially along the cylindrical surface of the conductive connection part 101. They are bonded to the surface of the conductive connection part 101 with thermally conductive silicone to ensure heat transfer. To improve heat dissipation efficiency, the fins undergo surface oxidation treatment to form an aluminum oxide protective film, enhancing corrosion resistance. The second heat dissipation component 22 has a heat dissipation channel 221 that penetrates the cylindrical through-hole of the terminal body 1, extending from the center of the conductive connection part 101 to the bottom surface of the insulating mounting part. The inner wall is smooth and burr-free, and a guide vane is axially arranged inside the channel to enhance air turbulence and improve heat dissipation efficiency. The cooling fan 222 is coaxially aligned with the heat dissipation channel 221 through the fan outlet. An anti-arc isolation mechanism is wrapped around the outside of the conductive connection part 101 to form a three-level protective barrier. The isolation cover 31 is a semi-cylindrical cover molded from epoxy resin, with the inner wall evenly distributed and integrally formed by a mold. It is used to disperse the arc energy to the protruding tip to avoid concentrated ablation of the cover. The insulating partition 32 is designed with an annular thin sheet made of polytetrafluoroethylene sheet, with a dovetail groove structure on the edge, which precisely matches the groove on the inner wall of the isolation cover 31 to prevent the partition from shifting.

[0029] In this embodiment, the heat dissipation fins 211 are made of aluminum, are evenly distributed along the length of the terminal body 1 and are tightly attached to the surface of the terminal body 1. The heat dissipation channel 221 passes through the conductive connection part 101 and the insulating mounting part, and has a circular cross-sectional shape. The arc-proof isolation structure 3 includes an isolation cover 31 and an insulating partition 32. The isolation cover 31 is connected to the terminal body 1 through a fixing block 312. An insulating partition 32 is installed between the isolation cover 31 and the terminal body 1. The insulating partition 32 is made of polytetrafluoroethylene and is attached to the inner wall of the isolation cover 31. The conductive connection part 101 is cylindrical and used for wire connection. The insulating mounting part is cubic and is fixed to the inner wall of the switch cabinet by bolts 102 and 103. The arc-shaped protrusions 311 on the inner wall of the isolation cover 31 are evenly distributed circumferentially, and the cross-section of the protrusions is arc-shaped.

[0030] The terminal includes a terminal body 1, which is integrally formed or fixedly connected by a conductive connection part 101 and an insulating mounting part. The conductive connection part 101 is cylindrical and made of copper or brass with excellent conductivity, and is used to connect with external wires. The insulating mounting part is a cubic structure and is made of high-strength insulating material (such as epoxy resin). It has a bolt 102 insulating mounting part and a 103 hole, through which the bolt 102 insulating mounting part and the 103 hole pass to fix the entire terminal to the inner wall of the switch cabinet, realizing the installation and positioning of the terminal in the switch cabinet.

[0031] To improve the heat dissipation performance of the terminal, the terminal body 1 is provided with heat dissipation fins 211 and heat dissipation channels 221. The heat dissipation fins 211 are made of aluminum (aluminum has good thermal conductivity and low cost) and are evenly distributed along the length of the terminal body 1. The bottom surface of the heat dissipation fins 211 is in close contact with the surface of the terminal body 1 to quickly conduct the heat generated during terminal operation. The heat dissipation is accelerated by increasing the contact area between the fins and the air. The heat dissipation channel 221 is set through the conductive connection part 101 and the insulating mounting part. Its cross-sectional shape is circular. Air convection can be formed inside the channel to further conduct the heat from inside the terminal. Together with the heat dissipation fins 211, it improves the overall heat dissipation efficiency. To prevent the terminal from malfunctioning during switching or failure... The electric arc generated during operation can affect surrounding components, so the terminal is also equipped with an arc-proof isolation structure 3. The arc-proof isolation structure 3 includes an isolation cover 31 and an insulating partition 32. The isolation cover 31 is a cylindrical structure with one end open, which is fixedly connected to the terminal body 1 by a fixing block 312. An insulating partition 32 is installed between the isolation cover 31 and the terminal body 1. The insulating partition 32 is made of polytetrafluoroethylene material, and the outer surface of the insulating partition 32 is tightly attached to the inner wall of the isolation cover 31 to form a double isolation barrier. In addition, the inner wall of the isolation cover 31 is provided with arc-shaped protrusions 311 evenly distributed in the circumferential direction. The cross-sectional shape of the protrusions is arc-shaped. This design can further enhance the arc-proof effect by changing the propagation path of the electric arc and prolonging the arc extinguishing time.

[0032] Working principle:

[0033] The terminal body 1 consists of a conductive connection part 101 and an insulating mounting part, forming the core functional carrier. The conductive connection part 101 is cylindrical, and the insulating mounting part 103 is connected to the external wire by a crimping method to achieve stable current conduction. The insulating mounting part is a cubic structure made of high-strength insulating materials such as epoxy resin. It is fixed to the inner wall of the switch cabinet through mounting screw holes on the bottom surface and bolts 102 and 103, which not only achieves mechanical fixation of the terminal but also blocks current leakage to the switch cabinet housing through the insulating material, ensuring electrical safety. When the terminal is working, the conductive connection part 101 will generate resistance due to the existence of resistance. The generated heat is rapidly dissipated through the synergistic effect of the first heat dissipation component 21 and the second heat dissipation component 22. The first heat dissipation component 21 (external fin heat dissipation) has aluminum heat dissipation fins 211 evenly distributed along the length of the terminal body 1, which quickly conducts the heat on the surface of the conductive connection part 101 to the fins. The fins are formed with a corrosion-resistant protective film through oxidation treatment, and at the same time, they utilize the increased surface area to directly contact the air, accelerating the dissipation of heat to the surrounding environment through natural convection. The internal air duct heat dissipation channel 221 runs through the conductive connection part 101 and the insulating mounting part, extending from the center of the conductive connection part 101 to the insulating part. On the bottom surface of the mounting section, internal guide vanes enhance air turbulence; the cooling fan 222 drives air to force convection within the channel, rapidly dissipating heat from the conductive connection section 101 through airflow, forming a dual heat dissipation system with the outer fins, preventing heat accumulation that could lead to terminal overheating, performance degradation, or malfunction. The arc-proof isolation structure 3 blocks arc hazards. When an arc is generated during switching operations or a fault, the isolation cover 31 and the insulating partition 32 form a three-level protective barrier, preventing damage to surrounding components from the arc. When an arc is generated, the protrusions alter the arc propagation path, prolonging its extinction time. The arc energy is dispersed to the raised tip to avoid concentrated ablation of the cover and reduce the risk of cover damage. Its high temperature resistance and arc resistance further block the arc diffusion and prevent the arc from directly contacting the terminal body 1 or switch cabinet components, forming a double physical isolation. The working heat is quickly discharged through the dual paths of natural heat dissipation of the outer fins and forced convection heat dissipation of the internal air duct, maintaining the terminal working temperature stably. If an arc occurs, the isolation cover 31 disperses the arc energy through the raised part and prolongs its extinguishing time, and the insulating partition 32 further blocks the arc diffusion, ultimately achieving safe, efficient and stable operation of the terminal in the switch cabinet.

[0034] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A dual heat dissipation and arc-proof isolation structure for connection terminals inside a switch cabinet (3), characterized in that, include: The terminal body (1), heat dissipation structure (2), and arc protection isolation structure (3) are provided. The terminal body (1) includes a conductive connection part (101) and an insulating mounting part. The heat dissipation structure (2) includes a first heat dissipation component (21) and a second heat dissipation component (22). The arc protection isolation structure (3) includes an isolation cover (31) and an insulating partition (32). The first heat dissipation component (21) is disposed on the outside of the terminal body (1) and includes multiple heat dissipation fins (211); the second heat dissipation component (22) includes a heat dissipation channel (221) and a heat dissipation fan (222). The heat dissipation channel (221) is a cylinder that penetrates the interior of the terminal body (1), and the heat dissipation fan (222) is installed at the end of the heat dissipation channel (221).

2. The dual heat dissipation and arc-proof isolation structure (3) for connection terminals inside a switch cabinet according to claim 1, characterized in that: The heat dissipation fins (211) are made of aluminum and are evenly distributed along the length of the terminal body (1) and are tightly attached to the surface of the terminal body (1).

3. The dual heat dissipation and arc-proof isolation structure (3) for connection terminals inside a switch cabinet according to claim 1, characterized in that: The heat dissipation channel (221) passes through the conductive connection part (101) and the insulating mounting part, and has a circular cross-sectional shape.

4. The dual heat dissipation and arc-proof isolation structure (3) for connection terminals inside a switch cabinet according to claim 1, characterized in that: The arc-proof isolation structure (3) includes an isolation cover (31) and an insulating partition (32). The isolation cover (31) is connected to the terminal body (1) via a fixing block (312).

5. The dual heat dissipation and arc-proof isolation structure (3) for connection terminals inside a switch cabinet according to claim 1, characterized in that: An insulating partition (32) is installed between the isolation cover (31) and the terminal body (1). The insulating partition (32) is made of polytetrafluoroethylene material and is fitted to the inner wall of the isolation cover (31).

6. The dual heat dissipation and arc-proof isolation structure (3) for connection terminals inside a switch cabinet according to claim 1, characterized in that: The conductive connection part (101) is cylindrical and used for wire connection, while the insulating mounting part is cubic and is fixed to the inner wall of the switch cabinet by bolts (103).

7. The dual heat dissipation and arc-proof isolation structure (3) for connection terminals inside a switch cabinet according to claim 1, characterized in that: The arc-shaped protrusions (311) on the inner wall of the isolation cover (31) are evenly distributed circumferentially, and the cross-section of the protrusions is arc-shaped.

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