A power distribution cabinet with a double-layer thermal insulation top cover
Patent Information
- Application Number
- CN202522288268.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-29
- Publication Date
- 2026-09-29
- Estimated Expiration
- 2035-10-29
AI Technical Summary
当受到太阳光长时间直射时，单层金属顶盖会快速吸收太阳辐射热量，且热量极易通过顶盖传导至配电柜内部，导致柜内温度显著升高
通过在户外配电柜上端设置由框架壳体和隔板组成的下隔热顶盖，在下隔热顶盖内设置由矩形框架、挤塑聚苯板、聚氨酯泡沫板以及岩棉板组成的隔热材料，在下隔热顶盖的上端设置由盛水盘和带坡度上壳体组成的上隔热顶盖，下隔热顶盖配合隔热材料组成下隔热层，上隔热顶盖配合其内盛放的水组成上隔热层，双层隔热结构可有效阻断太阳辐射热量向户外配电柜内部传导，其中，带坡度上壳体上开设的蜂窝通风孔形成自然对流通道，可促进带坡度上壳体内热量排出，盛水盘内的水可通过热吸收降低热量传递，挤塑聚苯板、聚氨酯泡沫板与岩棉板的组合能利用各自优异的隔热性能形成多重隔热屏障，整体设计可显著降低户外配电柜内部温度，保障内部电气元件在适宜温度下工作，提升元件绝缘性能与使用寿命，减少因高温引发的故障、跳闸等问题，避免设备损坏与安全事故，满足户外配电柜长期稳定运行的需求。
Smart Images
Figure CN224817698U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power distribution cabinets, and in particular to a power distribution cabinet with a double-layer heat-insulated top cover. Background Technology
[0002] As a key piece of equipment in a power system, the distribution cabinet is mainly used for power distribution, control, metering, and protection of electrical equipment. It is widely used in various fields such as industrial production, commercial buildings, residential communities, and outdoor public facilities. Internally, it integrates various electrical components such as circuit breakers, relays, transformers, and meters. It can distribute the electrical energy transmitted from the grid to various electrical terminals according to different power demands, and promptly cut off the power supply in case of overload, short circuit, leakage, or other faults, ensuring the safety of electrical equipment and personnel. It is a crucial infrastructure for maintaining the stable and reliable operation of the power system.
[0003] In outdoor settings, outdoor power distribution cabinets are constantly exposed to the natural environment and face complex climatic conditions, with direct sunlight being a significant factor affecting their operational stability. Traditional outdoor power distribution cabinets often use a single-layer metal structure for their top cover. While this structure provides some structural strength and rain protection, it lacks dedicated heat insulation components. When exposed to direct sunlight for extended periods, the single-layer metal top cover quickly absorbs solar radiation heat, which is easily conducted to the interior of the cabinet, causing a significant increase in internal temperature. The electrical components inside the cabinet have strict temperature requirements; excessively high temperatures can reduce their insulation performance, shorten their lifespan, and may even lead to component failure, circuit tripping, and in severe cases, equipment damage or safety accidents, failing to meet the requirements for long-term stable operation of outdoor power distribution cabinets. Utility Model Content
[0004] The main purpose of this utility model is to provide a power distribution cabinet with a double-layer heat-insulated top cover, which can effectively solve the problems in the background art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A power distribution cabinet with a double-layer insulated top cover includes an outdoor power distribution cabinet. A lower insulated top cover is fixedly installed on the upper end of the outdoor power distribution cabinet. The lower insulated top cover is composed of a frame shell and a partition. The partition is fixedly installed on the inner wall of the frame shell. Insulation material is placed inside the lower insulated top cover. The insulation material is composed of a rectangular frame, extruded polystyrene board, polyurethane foam board, and rock wool board. The extruded polystyrene board, polyurethane foam board, and rock wool board are all fixedly installed on the inner wall of the rectangular frame. An upper insulated top cover is fixedly installed on the upper end of the lower insulated top cover. The upper insulated top cover is composed of a water tray and a sloped upper shell. The sloped upper shell is fixedly installed on the upper end of the water tray.
[0006] Preferably, the outdoor power distribution cabinet is equipped with a sealed protective door at the front end.
[0007] Preferably, the frame housing on the lower heat-insulating top cover is fixedly installed on the upper end of the outdoor power distribution cabinet by welding, and heat dissipation holes are provided on the lower side wall of the frame housing.
[0008] Preferably, the thermal insulation material is placed inside the frame shell, and the thermal insulation material is also placed at the upper end of the partition. The extruded polystyrene board is located below the polyurethane foam board, and the rock wool board is located above the polyurethane foam board.
[0009] Preferably, the water tray on the upper insulated top cover is symmetrically fixed with mounting brackets at both ends, and the mounting brackets are also fixed to the left and right ends of the frame shell by bolts, and the water tray contains water.
[0010] Preferably, honeycomb ventilation holes are provided on the walls of the left and right sides of the sloping upper shell, and the sloping upper shell and the water tray are fixedly connected by welding.
[0011] Compared with the prior art, the present invention has the following beneficial effects: A double-layer insulation structure is constructed by installing a lower insulated top cover consisting of a frame shell and partitions at the top of the outdoor distribution cabinet. Inside the lower insulated top cover is an insulation material composed of a rectangular frame, extruded polystyrene board, polyurethane foam board, and rock wool board. Above the lower insulated top cover is an upper insulated top cover consisting of a water tray and a sloped upper shell. The lower insulated top cover, together with the insulation material, forms the lower insulation layer, and the upper insulated top cover, together with the water it holds, forms the upper insulation layer. This double-layer insulation structure effectively blocks the conduction of solar radiation heat into the outdoor distribution cabinet. The honeycomb pattern on the sloped upper shell further enhances the insulation. The ventilation holes form a natural convection channel, which can promote the heat dissipation from the sloping upper shell. The water in the water tray can reduce heat transfer through heat absorption. The combination of extruded polystyrene board, polyurethane foam board and rock wool board can form multiple heat insulation barriers by utilizing their excellent thermal insulation properties. The overall design can significantly reduce the internal temperature of the outdoor distribution cabinet, ensure that the internal electrical components operate at a suitable temperature, improve the insulation performance and service life of the components, reduce the problems of failure and tripping caused by high temperature, avoid equipment damage and safety accidents, and meet the needs of long-term stable operation of outdoor distribution cabinets. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a split view of the lower heat-insulating top cover and the upper heat-insulating top cover of this utility model; Figure 3 This is a schematic diagram showing the positional relationship between the lower heat-insulating top cover and the heat-insulating material after being cut apart according to this utility model. Figure 4 This is an exploded view of the thermal insulation material of this utility model; Figure 5 This is an exploded view of the upper heat-insulating top cover of this utility model.
[0013] In the diagram: 1. Outdoor distribution cabinet; 2. Lower insulated top cover; 3. Insulation material; 4. Upper insulated top cover; 5. Sealed protective door; 6. Frame shell; 7. Heat dissipation holes; 8. Partition; 9. Rectangular frame; 10. Extruded polystyrene board; 11. Polyurethane foam board; 12. Rock wool board; 13. Water tray; 14. Mounting connection frame; 15. Sloping upper shell; 16. Honeycomb ventilation holes. Detailed Implementation
[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0015] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, a power distribution cabinet with a double-layer insulated top cover includes an outdoor power distribution cabinet 1. A lower insulated top cover 2 is fixedly installed on the upper end of the outdoor power distribution cabinet 1. The lower insulated top cover 2 is composed of a frame shell 6 and a partition 8. The partition 8 is fixedly installed on the inner wall of the frame shell 6. Insulation material 3 is placed inside the lower insulated top cover 2. The insulation material 3 is composed of a rectangular frame 9, extruded polystyrene board 10, polyurethane foam board 11, and rock wool board 12. The extruded polystyrene board 10, polyurethane foam board 11, and rock wool board 12 are all... The upper heat insulation cover 4 is fixedly installed on the upper end of the lower heat insulation cover 2, which is fixedly installed on the inner wall of the rectangular frame 9. The upper heat insulation cover 4 consists of a water tray 13 and a sloped upper shell 15. The sloped upper shell 15 is fixedly installed on the upper end of the water tray 13. The lower heat insulation cover 2, which consists of a frame shell 6 and a partition 8, is set on the upper end of the outdoor power distribution cabinet 1. The heat insulation material, which consists of a rectangular frame 9, extruded polystyrene board 10, polyurethane foam board 11 and rock wool board 12, is set inside the lower heat insulation cover 2. Material 3: An upper insulated top cover 4, consisting of a water tray 13 and a sloped upper shell 15, is installed at the upper end of the lower insulated top cover 2. The lower insulated top cover 2, together with the insulation material 3, forms the lower insulation layer, and the upper insulated top cover 4, together with the water contained within it, forms the upper insulation layer. The double-layer insulation structure can effectively block the conduction of solar radiation heat to the interior of the outdoor distribution cabinet 1. The honeycomb ventilation holes 16 opened on the sloped upper shell 15 form a natural convection channel, which can promote the heat dissipation inside the sloped upper shell 15. The water in the water tray 13 can reduce heat transfer through heat absorption. The combination of extruded polystyrene board 10, polyurethane foam board 11 and rock wool board 12 can form multiple insulation barriers by utilizing their respective excellent insulation properties. The overall design can significantly reduce the internal temperature of the outdoor distribution cabinet 1, ensure that the internal electrical components work at a suitable temperature, improve the insulation performance and service life of the components, reduce the problems of failure and tripping caused by high temperature, avoid equipment damage and safety accidents, and meet the needs of long-term stable operation of the outdoor distribution cabinet 1.
[0016] Specifically, a sealed protective door 5 is installed at the front end of the outdoor distribution cabinet 1. The frame shell 6 on the lower heat-insulating top cover 2 is fixedly installed on the upper end of the outdoor distribution cabinet 1 by welding. Heat dissipation holes 7 are opened on the lower side wall of the frame shell 6. The heat insulation material 3 is placed inside the frame shell 6 and is also placed on the upper end of the partition 8. The extruded polystyrene board 10 is located below the polyurethane foam board 11, and the rock wool board 12 is located above the polyurethane foam board 11. The left and right ends of the water tray 13 on the upper heat-insulating top cover 4 are symmetrically fixed with mounting brackets 14. The mounting brackets 14 are also fixed to the left and right ends of the frame shell 6 by bolts. The water tray 13 contains water. Honeycomb ventilation holes 16 are opened on the left and right side walls of the sloping upper shell 15. The sloping upper shell 15 and the water tray 13 are welded together. The outdoor distribution cabinet 1 is fixedly connected. When using the outdoor distribution cabinet 1, first inject an appropriate amount of water into the water tray 13 through the honeycomb ventilation holes 16 to ensure that the water can evenly cover the bottom of the water tray 13. During the outdoor use of the outdoor distribution cabinet 1, the upper heat-insulating top cover 4 plays its role first. Its sloped upper shell 15 can block most of the direct sunlight and reduce the direct effect of solar radiation on the lower structure. At the same time, the honeycomb ventilation holes 16 opened on the left and right side walls of the sloped upper shell 15 can form a natural convection channel, promote the heat exchange between the sloped upper shell 15 and the outside air, and discharge some of the heat absorbed by the sloped upper shell 15. The water in the water tray 13 will further absorb the heat conducted down from the sloped upper shell 15 through heat absorption, reducing the efficiency of heat transfer to the lower heat-insulating top cover 2.
[0017] Furthermore, the frame shell 6 in the lower insulated top cover 2 provides installation support for the entire lower insulation structure. The heat dissipation holes 7 on its lower side wall can help dissipate the small amount of heat that may be generated inside the outdoor distribution cabinet 1. The partition 8 plays a role in supporting and positioning the insulation material 3 placed inside the frame shell 6. The rectangular frame 9 in the insulation material 3 provides a fixed frame for the extruded polystyrene board 10, polyurethane foam board 11 and rock wool board 12, so that the three can be stacked stably. The rock wool board 12 at the top initially plays a role in heat insulation and also has a certain fire resistance. The polyurethane foam board 11 in the middle has extremely low thermal conductivity, which can further enhance the heat insulation effect and reduce heat penetration. The extruded polystyrene board 10 at the bottom, with its excellent thermal insulation performance, further blocks the downward transfer of heat. The three work together to form multiple heat insulation barriers. Together with the overall structure of the lower insulated top cover 2, they effectively prevent the remaining heat from being conducted into the outdoor distribution cabinet 1, and finally achieve double-layer high-efficiency heat insulation, ensuring that the electrical components inside the outdoor distribution cabinet 1 work at a suitable temperature.
[0018] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A power distribution cabinet with a double-layer insulated top cover, comprising an outdoor power distribution cabinet (1), characterized in that: The upper end of the outdoor power distribution cabinet (1) is fixedly installed with a lower heat insulation top cover (2). The lower heat insulation top cover (2) is composed of a frame shell (6) and a partition (8). The partition (8) is fixedly installed on the inner wall of the frame shell (6). The lower heat insulation top cover (2) contains heat insulation material (3). The heat insulation material (3) is composed of a rectangular frame (9), an extruded polystyrene board (10), a polyurethane foam board (11), and a rock wool board (12). The extruded polystyrene board (10), the polyurethane foam board (11), and the rock wool board (12) are all fixedly installed on the inner wall of the rectangular frame (9). The upper end of the lower heat insulation top cover (2) is fixedly installed with an upper heat insulation top cover (4). The upper heat insulation top cover (4) is composed of a water basin (13) and a sloped upper shell (15). The sloped upper shell (15) is fixedly installed on the upper end of the water basin (13).
2. The distribution cabinet with a double-layer heat-insulated top cover according to claim 1, characterized in that: The outdoor power distribution cabinet (1) is equipped with a sealed protective door (5) at the front end.
3. The distribution cabinet with a double-layer heat-insulated top cover according to claim 2, characterized in that: The frame housing (6) on the lower heat insulation top cover (2) is fixedly installed on the upper end of the outdoor power distribution cabinet (1) by welding, and heat dissipation holes (7) are provided on the lower side wall of the frame housing (6).
4. The distribution cabinet with a double-layer heat-insulated top cover according to claim 3, characterized in that: The thermal insulation material (3) is placed inside the frame shell (6), and the thermal insulation material (3) is also placed at the upper end of the partition (8). The extruded polystyrene board (10) is located below the polyurethane foam board (11), and the rock wool board (12) is located above the polyurethane foam board (11).
5. A power distribution cabinet with a double-layer heat-insulated top cover according to claim 4, characterized in that: The water tray (13) on the upper heat-insulating top cover (4) is symmetrically fixed with mounting brackets (14) at both ends. The mounting brackets (14) are also fixed to the left and right ends of the frame shell (6) by bolts. The water tray (13) contains water.
6. A power distribution cabinet with a double-layer heat-insulated top cover according to claim 5, characterized in that: The sloped upper shell (15) has honeycomb ventilation holes (16) on the walls on both sides. The sloped upper shell (15) and the water tray (13) are fixedly connected by welding.