A high-voltage enclosed common-enclosure busbar assembly

Abstract

This utility model discloses a high-voltage enclosed common-enclosure busbar assembly, belonging to the field of high-voltage common-enclosure busbar technology. Its key technical features include a housing and a controller. By setting up a heat dissipation mechanism, under normal circumstances, the heat-conducting structures on both sides of the housing absorb heat generated inside the housing, such as from the busbar conductors and insulators. This conduction heat dissipation initially reduces the temperature of the heat source. Simultaneously, a temperature sensor monitors the temperature inside the housing in real time. When the temperature exceeds a threshold set by the controller, feedback is sent to the controller. The controller then starts a variable-frequency fan according to a predetermined program, drawing in cold air through the bottom air inlet. The cold air is guided by an inclined guide plate to the outside of the insulators and busbar conductors, and then, after being gathered by the top suction frame and guide plate, is discharged by the variable-frequency fan. This forms a dual-mode heat dissipation system: passive heat dissipation through the heat-conducting structure and active heat dissipation through forced convection by the variable-frequency fan. This design significantly improves overall heat dissipation efficiency and effectively reduces the temperature rise of the busbar conductors.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage common busbar technology, and in particular to a high-voltage enclosed common busbar assembly. Background Technology

[0002] With the continuous development of my country's economy, the demand for power supply is increasing. In the power supply industry, various electrical infrastructure equipment has also developed rapidly. Among them, busbars are made of copper and aluminum materials with high conductivity and are used to transmit electrical energy. They are products with the ability to collect and distribute power. With continuous technological progress, high-voltage common-enclosure busbars have been increasingly used due to their excellent short-circuit resistance and large current carrying capacity. High-voltage common-enclosure busbars are mainly used for plant service circuits, substations, hydropower stations, and connections between generators and transformers. They can provide current ratings up to 4000A and voltage ratings up to 10KV. They have a unique circular structure and a higher protection level than traditional common-enclosure busbars.

[0003] The enclosure of a high-voltage common busbar is sealed, which can greatly reduce the number of power outages for maintenance and greatly avoid the influence of external factors. However, the sealed enclosure also brings a series of problems. When the high-voltage common busbar is working, it generates heat, which is dissipated into the interior of the enclosure. Some high-voltage common busbars have heat sinks added inside their enclosures. Although this speeds up the heat dissipation to some extent, when the high-voltage common busbar operates under high load for a long time, it will generate a lot of heat. At this time, it will take a long time to dissipate heat through heat sinks alone. Heat will gradually accumulate inside the enclosure, causing the internal temperature to rise, which will have a certain impact on the internal components and affect the service life of the high-voltage common busbar.

[0004] An existing patent (publication number: CN220775333U) discloses a high-voltage enclosed common-enclosure busbar. This utility model ensures the enclosure of the high-voltage enclosed common-enclosure busbar while simultaneously dissipating heat from both sides and the bottom of the outer casing. This allows for rapid heat dissipation from the interior of the outer casing during prolonged operation of the high-voltage common-enclosure busbar, greatly preventing heat accumulation inside the casing and thus avoiding the impact of increased internal temperature on the high-voltage common-enclosure busbar, thereby ensuring its service life.

[0005] To address the aforementioned issues, existing patents offer solutions. However, these patents employ heat sinks, heat dissipation plates, and heat absorption plates to construct a conductive heat dissipation system. The principle involves the heat absorption plate absorbing heat through contact with the heat source inside the casing, which is then conducted to the heat dissipation structure on the side of the casing via the heat absorption rod. The heat is then radiated to the outside by the heat dissipation plate and surface heat sinks. However, after the busbar conductors are connected and the casing is sealed, this solution relies solely on a passive conductive heat dissipation path of heat absorption, conduction, and radiation, lacking air circulation assistance. This leads to significant heat accumulation under high load conditions. On one hand, the heat conduction efficiency between solids is limited, and natural radiation is greatly affected by ambient temperature. The air temperature inside the casing can easily rise continuously until the conductor temperature exceeds the standard. At the same time, stagnant airflow in the enclosed space forms local hot spots, accelerating the aging of insulating materials such as insulators and even inducing partial discharge. On the other hand, corrosive gases generated by insulation aging cannot be discharged for a long time, which will exacerbate conductor oxidation and insulation deterioration. Long-term operation may lead to a shortened busbar life and an increased risk of failure. Furthermore, the passive heat dissipation mode is difficult to cope with extreme conditions such as sudden overloads.

[0006] To address this, a high-voltage enclosed common-enclosure busbar assembly is proposed. Utility Model Content

[0007] The purpose of this utility model is to provide a high-voltage enclosed common-enclosure busbar assembly that can solve the problem of the conductive heat dissipation system composed of heat sinks, heat dissipation plates, heat absorption plates, etc. in the above-mentioned patent. The principle is that the heat absorption plate absorbs heat by contacting the heat source inside the shell, and then conducts it to the heat dissipation structure on the side of the shell through the heat absorption rod. The heat is then radiated to the outside by the heat dissipation plate and surface heat sinks. However, after the busbar conductors are connected and the shell is sealed, this solution only relies on the passive conductive heat dissipation path of heat absorption, heat conduction and then radiation, lacking air circulation assistance. This leads to significant heat accumulation under high load conditions. On the one hand, the heat conduction efficiency between solids is limited, and natural radiation is greatly affected by the ambient temperature. The air temperature inside the shell can easily rise continuously until the conductor temperature rise exceeds the standard. At the same time, the airflow stagnation in the enclosed space forms local hot spots, which accelerates the aging of insulating materials such as insulators and may even induce partial discharge. On the other hand, the corrosive gases produced by insulation aging cannot be discharged for a long time, which will aggravate conductor oxidation and insulation deterioration. Long-term operation may lead to a shortened busbar life and an increased risk of failure. Moreover, the passive heat dissipation mode is difficult to cope with extreme conditions such as sudden overload.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a high-voltage enclosed common busbar assembly, comprising a housing and a controller, wherein insulators are provided on both sides and in the middle of the bottom side inside the housing, a busbar conductor is provided on the top of the insulators, a heat dissipation mechanism is provided inside the housing, and a dust filter structure is provided at the bottom of the housing;

[0009] The heat dissipation mechanism includes heat-conducting structures disposed on both sides of the outer casing. Air inlets are provided on both sides and in the middle of the bottom of the outer casing. Inclined guide plates are welded to both sides and in the middle of the bottom inside the outer casing. The inclined guide plates are located outside the insulator, bus conductor and air inlets. Drainage plates are welded to both sides and in the middle of the top inside the outer casing. The drainage plates are located on top of the insulator and bus conductor. A suction frame is bolted inside the outer casing. Temperature sensors are provided on the front and rear sides of the top of the suction frame. The sensing end of the temperature sensor is located inside the outer casing. A variable frequency fan is embedded in the top of the suction frame.

[0010] Preferably, the heat-conducting structure includes fixing grooves formed on both sides of the outer casing, and a heat-conducting plate is disposed inside the fixing groove, the heat-conducting plate being made of aluminum alloy material.

[0011] Preferably, the top and bottom of the heat-conducting plate are fixedly connected to mounting plates, which are bolted to the outside of the outer shell.

[0012] Preferably, a heat-absorbing strip is welded to the inner side of the heat-conducting plate. The heat-absorbing strip is made of aluminum-based composite material and is located inside the outer shell. Heat dissipation fins are welded to the outer side of the heat-conducting plate.

[0013] Preferably, the dust filtration structure includes a frame disposed at the bottom of the housing, the frame being located at the bottom of the air inlet, and a dust filter net being fixedly connected to the outside of the frame.

[0014] Preferably, connecting plates are welded to the front and rear sides of both sides of the frame, and the connecting plates are bolted to the outside of the outer shell.

[0015] Preferably, the front and rear sides of the outer shell are welded with connecting frame plates, and the outer side of the connecting frame plates is provided with mounting grooves.

[0016] Preferably, a protective net is bolted to the top of the variable frequency fan, and the protective net is hexagonal mesh.

[0017] Preferably, a dustproof and ventilation mesh frame is bolted to the outer side of the heat-conducting plate, and the dustproof and ventilation mesh frame is located on the outer side of the heat dissipation fins.

[0018] Preferably, a fine filter screen is welded to the bottom side inside the air inlet, and the fine filter screen is located on top of the dust filter screen.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This application, by setting up a heat dissipation mechanism, firstly, under normal circumstances, the heat-conducting structures on both sides of the outer shell absorb the heat generated inside the outer shell, such as the bus conductors and insulators, and initially reduce the temperature of the heat source through conduction heat dissipation. At the same time, the temperature sensor monitors the temperature inside the outer shell in real time. When the temperature exceeds the threshold set by the controller, it feeds back to the controller. The controller starts the variable frequency fan according to the predetermined program, draws in cold air through the bottom air inlet, and guides the cold air to the outside of the insulators and bus conductors through the inclined guide plate. Then, the hot air is discharged by the variable frequency fan after being gathered by the top suction frame and the guide plate. This forms a dual mode of passive heat dissipation by the heat-conducting structure and active heat dissipation by the forced convection of the variable frequency fan. This design significantly improves the overall heat dissipation efficiency, effectively reduces the temperature rise of the bus conductors, avoids the generation of local hot spots, delays the aging of insulation materials, reduces the risk of partial discharge, and the speed of the variable frequency fan can be automatically adjusted in real time according to the preset threshold set by the controller to balance heat dissipation effect and energy consumption control.

[0021] 2. By setting up a dust filter structure, this application can filter dust particles in the air entering the housing through the air inlet, preventing dust from adhering to the surface of the bus conductor and insulator and affecting the insulation performance. At the same time, it avoids dust accumulation from obstructing airflow, ensures unobstructed heat dissipation channels, maintains efficient heat dissipation, and further ensures the stable operation of the high-voltage common-enclosure bus. Attached Figure Description

[0022] Figure 1 This is an overall structural diagram of the high-voltage enclosed common-enclosure busbar assembly of this utility model;

[0023] Figure 2 This is a structural diagram of the outer shell of this utility model;

[0024] Figure 3 This is a structural diagram of the heat dissipation mechanism of this utility model;

[0025] Figure 4 This is a structural diagram of the heat-conducting structure of this utility model;

[0026] Figure 5 This is a structural diagram of the dust filter structure of this utility model;

[0027] Figure 6 This is a structural diagram of the air inlet of this utility model.

[0028] In the diagram, 1. Outer shell; 2. Controller; 3. Insulator; 4. Busbar conductor; 5. Heat dissipation mechanism; 501. Heat conduction structure; 5011. Fixing groove; 5012. Heat conduction plate; 5013. Mounting plate; 5014. Heat absorption strip; 5015. Heat dissipation fins; 502. Air inlet; 503. Inclined guide plate; 504. Air diversion plate; 505. Suction frame; 506. Temperature sensor; 507. Variable frequency fan; 6. Dust filtration structure; 601. Frame; 602. Dust trap; 603. Connecting plate; 7. Connecting frame plate; 8. Protective net; 9. Dustproof ventilation net frame; 10. Fine filter. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-6 The present invention provides the following technical solution:

[0031] A high-voltage enclosed common busbar assembly includes a housing 1 and a controller 2. Insulators 3 are provided on both sides and in the middle of the bottom side inside the housing 1. Busbar conductors 4 are provided on the top of the insulators 3. A heat dissipation mechanism 5 is provided inside the housing 1. A dust filter structure 6 is provided at the bottom of the housing 1.

[0032] The heat dissipation mechanism 5 includes heat-conducting structures 501 disposed on both sides of the outer casing 1. Air inlets 502 are provided on both sides and in the middle of the bottom of the outer casing 1. Inclined guide plates 503 are welded on both sides and in the middle of the bottom side inside the outer casing 1. The inclined guide plates 503 are located outside the insulator 3, the bus conductor 4 and the air inlets 502. Drainage plates 504 are welded on both sides and in the middle of the top side inside the outer casing 1. The drainage plates 504 are located on the top of the insulator 3 and the bus conductor 4. A suction frame 505 is bolted inside the outer casing 1. Temperature sensors 506 are provided on the front and rear sides of the top of the suction frame 505. The sensing end of the temperature sensor 506 is located inside the outer casing 1. A variable frequency fan 507 is embedded in the top of the suction frame 505.

[0033] In this embodiment: By setting up a heat dissipation mechanism 5 and a dust filter structure 6, during normal operation, the heat conduction structures 501 on both sides of the outer casing 1 absorb the heat generated by heat sources such as the bus conductor 4 and insulator 3, and initially reduce the internal temperature through conduction heat dissipation. When the temperature sensor 506 detects that the temperature inside the outer casing 1 exceeds the preset threshold of the controller 2, it transmits the data back to the controller 2. The controller 2 immediately starts the variable frequency fan 507 to draw in the hot air inside the outer casing 1. At this time, the bottom air inlet 502 simultaneously draws in cold air, which is guided to the outside of the heat source for heat exchange through the inclined guide plate 503. The hot air is then gathered by the top guide plate 504 and discharged through the variable frequency fan 507, forming a dual heat dissipation mode of "passive conduction + active convection", which effectively reduces the temperature rise of the bus conductor 4 and avoids local hot spots. At the same time, the dust filter structure 6 is located at the bottom of the outer casing 1. It filters dust in the air and prevents it from entering the interior of the outer casing 1 after passing through the air inlet 502, preventing dust from affecting the insulation performance or blocking the heat dissipation channel, and ensuring heat dissipation efficiency and equipment operation stability.

[0034] Specifically, such as Figure 4 As shown, the heat-conducting structure 501 includes fixing grooves 5011 opened on both sides of the outer shell 1, and a heat-conducting plate 5012 is disposed inside the fixing groove 5011. The heat-conducting plate 5012 is made of aluminum alloy material.

[0035] Specifically, such as Figure 4 As shown, mounting plates 5013 are fixedly connected to both the top and bottom of the heat-conducting plate 5012, and the mounting plates 5013 are bolted to the outside of the outer casing 1.

[0036] Specifically, such as Figure 4 As shown, a heat-absorbing strip 5014 is welded to the inner side of the heat-conducting plate 5012. The heat-absorbing strip 5014 is made of aluminum-based composite material and is located inside the outer shell 1. Heat dissipation fins 5015 are welded to the outer side of the heat-conducting plate 5012.

[0037] In this embodiment: by setting a heat-conducting structure 501, the aluminum alloy heat-conducting plate 5012 in the fixing grooves 5011 on both sides of the outer shell 1 directly absorbs the heat emitted by the bus conductor 4 and the insulator 3 through the inner aluminum-based composite heat-absorbing strip 5014. The heat is then conducted to the outer heat dissipation fins 5015 through the heat-conducting plate 5012. Passive heat dissipation is achieved by utilizing the high thermal conductivity of aluminum alloy. At the same time, the heat dissipation fins 5015 increase the surface area and accelerate heat radiation. Combined with subsequent active convection heat dissipation, a multi-level heat conduction path is formed, which effectively reduces the internal heat source temperature of the outer shell 1 and delays insulation aging.

[0038] Specifically, such as Figure 5 As shown, the dust filter structure 6 includes a frame 601 disposed at the bottom of the housing 1. The frame 601 is located at the bottom of the air inlet 502, and a dust filter net 602 is fixedly connected to the outside of the frame 601.

[0039] Specifically, such as Figure 5 As shown, connecting plates 603 are welded to the front and rear sides of both sides of the frame 601, and the connecting plates 603 are bolted to the outside of the outer shell 1.

[0040] In this embodiment: by setting the dust filter structure 6, the dust net 602 on the outside of the bottom frame 601 of the outer shell 1 can intercept and filter dust particles in the air, prevent dust from entering the interior of the outer shell 1 through the air inlet 502, avoid dust adhering to the bus conductor 4 or insulator 3 and affecting the insulation performance, and at the same time prevent dust accumulation from blocking the heat dissipation channel, ensuring that cold air flows in smoothly and maintaining the efficient operation of passive and active heat dissipation modes.

[0041] Specifically, such as Figure 6 As shown, connecting frame plates 7 are welded to both the front and rear sides of the outer casing 1, and mounting grooves are provided on the outer side of the connecting frame plates 7.

[0042] Specifically, such as Figure 2 As shown, a protective mesh 8 is attached to the top of the variable frequency fan 507. The protective mesh 8 is hexagonal grid in shape.

[0043] In this embodiment: By setting the connecting frame plate 7 and the protective net 8, the connecting frame plate 7 on the front and rear sides of the outer shell 1 provides a standardized mounting groove, which facilitates quick splicing between adjacent outer shells 1 and can be used to install a sealing plate for closed use when not splicing. The hexagonal mesh protective net 8 on the top of the variable frequency fan 507 can block foreign objects from entering, avoid damage to the blades of the variable frequency fan 507, and at the same time maintain smooth airflow, ensuring the stability and safety of the active heat dissipation function.

[0044] Specifically, such as Figure 4 As shown, a dustproof and ventilation mesh frame 9 is bolted to the outside of the heat conduction plate 5012, and the dustproof and ventilation mesh frame 9 is located on the outside of the heat dissipation fins 5015.

[0045] Specifically, such as Figure 6 As shown, a fine filter 10 is welded to the bottom side inside the air inlet 502, and the fine filter 10 is located on top of the dust filter 602.

[0046] In this embodiment: by setting a dustproof ventilation mesh frame 9 and a fine filter 10, the dustproof ventilation mesh frame 9 on the outside of the heat conduction plate 5012 can block external debris from contacting the heat dissipation fins 5015, avoiding dust accumulation on the heat dissipation fins 5015 and affecting the heat dissipation efficiency. The fine filter 10 of the air inlet 502 and the dust trap 602 form a graded filtration, which further traps tiny particles in the air, ensuring that the air entering the outer casing 1 is clean, protecting the insulator 3 and the bus conductor 4, and maintaining the unobstructed heat dissipation channels such as the inclined guide plate 503 and the diversion plate 504.

[0047] Working Principle: During the use of the high-voltage enclosed common-enclosure busbar assembly, the busbar conductor 4 first generates heat by transmitting electrical energy, and the insulator 3 and other components also generate heat due to energy loss. At this time, the heat-absorbing strips 5014 of the aluminum-based composite material on both sides of the outer casing 1 directly absorb the heat from the heat source, which is then conducted to the outer heat dissipation fins 5015 via the aluminum alloy heat-conducting plate 5012. By increasing the surface area, passive radiation heat dissipation is accelerated, initially reducing the internal temperature. When the temperature sensor 506 detects that the temperature inside the outer casing 1 exceeds the preset threshold of the controller 2, the sensor feeds the data back to the controller 2, triggering the variable frequency fan 507 to start. The variable frequency fan 507 draws hot air from the top of the outer casing 1. At the same time, the bottom air inlet 502 draws in cold outside air due to negative pressure. The cold air is filtered by the dust filter 602 and the fine filter 10 of the air inlet 502 to trap dust particles. Then, it is guided by the inclined guide plate 503 to the outside of the insulator 3 and the bus conductor 4 to exchange heat with the heat source and absorb additional heat. The heated air rises and is gathered in the suction frame 505 area by the top guide plate 504. It is then discharged from the outer casing 1 by the variable frequency fan 507, forming a dual heat dissipation cycle of "passive conduction + active convection". This effectively reduces the temperature rise of the bus conductor 4 and eliminates local hot spots. The overall coordination ultimately ensures the safe and stable operation of the high-voltage common box bus under high load conditions.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-voltage enclosed common-enclosure busbar assembly, comprising a housing (1) and a controller (2), characterized in that: Insulators (3) are provided on both sides and in the middle of the bottom side inside the outer shell (1). A bus conductor (4) is provided on the top of the insulator (3). A heat dissipation mechanism (5) is provided inside the outer shell (1). A dust filter structure (6) is provided at the bottom of the outer shell (1). The heat dissipation mechanism (5) includes a heat-conducting structure (501) disposed on both sides of the outer shell (1). Air inlets (502) are provided on both sides and in the middle of the bottom of the outer shell (1). Inclined guide plates (503) are welded on both sides and in the middle of the bottom side inside the outer shell (1). The inclined guide plates (503) are located outside the insulator (3), bus conductor (4) and air inlets (502). Drainage plates (504) are welded on both sides and in the middle of the top side inside the outer shell (1). The drainage plates (504) are located on the top of the insulator (3) and bus conductor (4). A suction frame (505) is bolted inside the outer shell (1). Temperature sensors (506) are provided on the front and rear sides of the top of the suction frame (505). The sensing end of the temperature sensor (506) is located inside the outer shell (1). A variable frequency fan (507) is embedded in the top of the suction frame (505).

2. A high voltage enclosed compound bus assembly according to claim 1, wherein: The heat-conducting structure (501) includes a fixing groove (5011) on both sides of the outer shell (1), and a heat-conducting plate (5012) is provided inside the fixing groove (5011). The heat-conducting plate (5012) is made of aluminum alloy.

3. A high voltage enclosed compound busbar assembly according to claim 2, characterized in that: The top and bottom of the heat-conducting plate (5012) are fixedly connected to mounting plates (5013), which are bolted to the outside of the outer shell (1).

4. A high voltage enclosed compound bus assembly as recited in claim 2, wherein: The heat-conducting plate (5012) has a heat-absorbing strip (5014) welded to its inner side. The heat-absorbing strip (5014) is made of aluminum-based composite material. The heat-absorbing strip (5014) is located inside the outer shell (1). The heat-dissipating fins (5015) are welded to the outer side of the heat-conducting plate (5012).

5. A high voltage enclosed compound bus assembly as recited in claim 1, wherein: The dust filter structure (6) includes a frame (601) disposed at the bottom of the outer shell (1), the frame (601) being located at the bottom of the air inlet (502), and a dust filter net (602) being fixedly connected to the outside of the frame (601).

6. A high voltage enclosed compound bus assembly as claimed in claim 5, wherein: Connecting plates (603) are welded to the front and rear sides of both sides of the frame (601), and the connecting plates (603) are bolted to the outside of the outer shell (1).

7. A high voltage enclosed compound bus assembly as recited in claim 1, wherein: The front and rear sides of the outer shell (1) are welded with connecting frame plates (7), and the outer side of the connecting frame plates (7) is provided with an installation groove.

8. A high voltage enclosed compound bus assembly as set forth in claim 1, further characterized by: The top of the variable frequency fan (507) is fitted with a protective net (8), which is hexagonal mesh in shape.

9. A high voltage enclosed busbar assembly according to claim 4, characterized in that: A dustproof ventilation mesh frame (9) is bolted to the outside of the heat-conducting plate (5012), and the dustproof ventilation mesh frame (9) is located on the outside of the heat dissipation fins (5015).

10. A high voltage enclosed compound bus assembly as set forth in claim 5, further characterized by: A fine filter screen (10) is welded to the bottom side inside the air inlet (502), and the fine filter screen (10) is located on top of the dust filter screen (602).

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