Ventilation and waterproof assembly of high-voltage cabinet

Abstract

The utility model belongs to the technical field of electrical equipment, concretely relates to a ventilation waterproof subassembly of high voltage cabinet. High voltage cabinet lateral wall is equipped with ventilation hole, and the subassembly includes the base plate that covers the outside of ventilation hole, and the water guide louvre of multiple groups is arranged along the height direction interval outside base plate, the inner side of base plate extends inwards and forms the water conservancy frame of guiding, and the bottom of water conservancy frame of guiding is the drainage slope of inside high outside low, the inner side of water conservancy frame of guiding is equipped with outer baffle and inner baffle, and the top of water conservancy frame of guiding is sealed and is connected with the upper portion of outer baffle, and the lower portion forms lower air inlet between the lower portion and drainage slope, and the inner baffle is arranged in the outer baffle and is close to the inside one side of cabinet body, and the lower portion is sealed and is connected with drainage slope, and the upper portion forms upper air outlet between the upper portion and the top of water conservancy frame of guiding, and the lower end height of outer baffle is lower than the upper end height of inner baffle. The utility model forms the air flow channel of turning back by directional water guide of drainage slope and high and low staggered double layer baffle, and the ventilation heat dissipation and waterproof protective performance of high voltage cabinet are considered.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment technology, and specifically relates to a ventilation and waterproof component for a high-voltage switchgear. Background Technology

[0002] High-voltage switchgear is used for power distribution and line protection. It is often installed in outdoor environments. When it is running, the internal components generate heat, so a ventilation structure is required to dissipate the heat. At the same time, the ventilation structure is required to be waterproof and dustproof.

[0003] However, the ventilation components of existing high-voltage switchgear often rely solely on a single layer of louvers on the outside to block water, which can only prevent rainwater from falling vertically. During heavy rain splashing and water accumulation, rainwater can easily seep in. The ventilation cavity lacks a layered waterproofing and directional drainage structure, so the infiltrated rainwater cannot be discharged in time, resulting in poor waterproofing performance. Utility Model Content

[0004] This invention solves the problems mentioned in the background art by setting up a flow guide frame with an inner high and outer low drainage slope, and forming a ventilation channel with an outer partition whose lower end is lower than the upper end of the inner partition, thereby achieving layered water isolation and gravity-directed drainage.

[0005] The technical solution of this utility model is implemented as follows: a ventilation and waterproof component for a high-voltage switchgear includes ventilation holes formed on the side wall of the high-voltage switchgear, a base plate covering the outside of the ventilation holes, and multiple sets of water-guiding louvers spaced apart along the height direction of the base plate. The inner periphery of the substrate extends inward to form a flow guiding frame, and the bottom of the flow guiding frame is a drainage slope that is higher on the inside and lower on the outside. The flow guide frame is provided with an outer partition and an inner partition. The upper part of the outer partition is sealed to the top of the flow guide frame, and the lower part forms a lower air inlet between it and the drainage slope. The inner partition is located on the side of the outer partition near the inside of the cabinet. Its lower part is sealed to the drainage slope, and its upper part forms an upper air outlet between the top of the air guide frame. The lower end of the outer partition is lower than the upper end of the inner partition.

[0006] The present invention is further configured such that the outer partition and the inner partition are integrally formed and sealed to the flow guide frame.

[0007] The present invention is further configured such that the lower end of the outer partition is bent toward the side of the substrate to form an outer water-blocking flange.

[0008] The present invention is further configured such that the upper end of the inner partition is bent toward the side of the outer partition to form an inner water-blocking flange.

[0009] The present invention is further configured such that the lower end of the drainage slope extends to the inner sidewall of the substrate.

[0010] The present invention is further configured such that the substrate is detachably connected to the outer side wall of the high-voltage cabinet by means of a snap fastener or bolt.

[0011] By adopting the above technical solution, the beneficial effects that this utility model can achieve are: 1. By using the drainage slope at the bottom of the flow guide frame, which is higher inside and lower outside, and extending to the lower end of the slope to the inner side wall of the substrate, the water that has seeped into the cavity is directly discharged outward along the slope, which improves the drainage performance of the ventilation component.

[0012] 2. By staggering the upper and lower outer and inner partitions to form a U-shaped ventilation channel with bottom inlet and top outlet, a double-layer water level barrier is constructed, which improves the waterproof protection level of the high-voltage cabinet ventilation structure.

[0013] 3. By cooperating with the outer water-blocking flange at the lower end of the outer partition and the inner water-blocking flange at the upper end of the inner partition, the water film rises and the floating water mist is blocked respectively, thus improving the water-air separation effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a first cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the second cross-sectional structure of this utility model.

[0015] The attached diagram is labeled as follows: 1. High voltage cabinet; 2. Ventilation hole; 3. Base plate; 4. Water guide louver; 5. Flow guide frame; 6. Drainage slope; 7. Outer partition; 8. Inner partition; 9. Outer water-retaining flange; 10. Inner water-retaining flange. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-3 : Example: This embodiment provides a ventilation and waterproof component for a high-voltage switchgear, including a ventilation hole 2 formed on the side wall of the high-voltage switchgear 1, a base plate 3 covering the outside of the ventilation hole 2, and multiple sets of water-guiding louvers 4 spaced apart along the height direction of the base plate 3. The inner periphery of the substrate 3 extends inward to form a flow guiding frame 5, and the bottom of the flow guiding frame 5 is a drainage slope 6 with the inner side higher than the outer side. The flow guide frame 5 is provided with an outer partition 7 and an inner partition 8. The upper part of the outer partition 7 is sealed to the top of the flow guide frame 5, and the lower part forms a lower air inlet between the outer partition 7 and the drainage slope 6. The inner partition 8 is located on the side of the outer partition 7 near the inside of the cabinet. Its lower part is sealed to the drainage slope 6, and its upper part forms an upper air outlet between the top of the air guide frame 5. The lower end of the outer partition 7 is lower than the upper end of the inner partition 8.

[0017] This embodiment relates to a ventilation and waterproof component for use in a high-voltage switchgear 1. The component is installed at a pre-set ventilation hole 2 on the side wall of the high-voltage switchgear 1. It is used to ensure ventilation and heat dissipation inside the switchgear while preventing external rainwater from entering the switchgear. It is suitable for use in high-voltage switchgear 1 in outdoor and semi-outdoor scenarios.

[0018] The substrate 3 serves as the outer mounting base for the entire assembly, supporting the outer water guiding structure and the inner cavity structure, while also covering the cabinet ventilation holes 2 to form an outer protective base. The substrate 3 is a flat plate with dimensions matching the outer dimensions of the cabinet ventilation holes 2, completely covering the ventilation hole 2 area. The substrate 3 is set on the outer surface of the side wall of the high-voltage cabinet 1, with the plate surface fitting against the cabinet side wall. The edge area of ​​the substrate 3 can be detachably assembled with the side wall of the high-voltage cabinet 1 by means of snap-fit ​​or bolt locking, facilitating later disassembly, maintenance, and cleaning.

[0019] The water-guiding louvers 4 serve as the first water-blocking structure on the outside of the component, blocking most of the direct and splashing rainwater while forming a ventilation channel for external air to enter the component. The water-guiding louvers 4 are multiple sets of obliquely extending sheet-like structures, each set of louvers is set in an oblique downward direction, and there is a uniform ventilation gap between adjacent louvers. Multiple sets of water-guiding louvers 4 are arranged at intervals along the height direction of the substrate 3 and are set on the outer surface of the substrate 3. The inner edge of each water-guiding louver 4 is integrally bent and connected to the outer surface of the substrate 3, and the tilt direction of the louvers faces the lower outer side of the cabinet, so that the rainwater that comes into contact with the louvers can slide down the oblique surface of the louvers to the outside of the cabinet.

[0020] The flow guide frame 5 is used to enclose and form a ventilation cavity inside the substrate 3, providing an installation carrier for the internal partition and the bottom water guiding structure, while defining the flow boundary of airflow and waterflow. The flow guide frame 5 is an enclosed frame that extends vertically from the inner periphery of the substrate 3 into the cabinet, with a rectangular frame cross-section. The top, sides and bottom of the frame together enclose the internal cavity space. The flow guide frame 5 is located inside the substrate 3, facing the inside of the high-voltage cabinet 1, and surrounds the outer area of ​​the cabinet ventilation hole 2. The outer edge of the flow guide frame 5 is integrally bent and connected to the inner periphery of the substrate 3, and the inner end face of the frame can fit against the inner side of the side wall of the high-voltage cabinet 1 to form a lateral sealing boundary of the cavity.

[0021] The drainage slope 6 serves as a water-guiding structure at the bottom of the cavity, guiding the water inside the cavity towards the substrate 3 and outwards by gravity, thus preventing water accumulation inside the cavity. The drainage slope 6 is an inclined plate at the bottom of the flow-guiding frame 5, with an overall slope that is higher inside and lower outside. The side closer to the inside of the cabinet is the higher position, and the side closer to the substrate 3 is the lower position. The drainage slope 6 is located at the bottom of the flow-guiding frame 5, extending obliquely along the depth direction of the cavity, continuously covering the entire bottom area of ​​the cavity on both sides of the outer partition 7. The outer edge of the drainage slope 6 is integrally connected to the lower inner side of the substrate 3, and the two sides of the drainage slope 6 are integrally connected to the inner walls of the two sides of the flow-guiding frame 5. The high end of the drainage slope 6 extends to the bottom of the inner partition 8, and the low end of the drainage slope 6 extends to the inner wall of the substrate 3, allowing the water inside the cavity to flow directly towards the substrate 3 along the slope and be discharged to the outside of the cabinet.

[0022] The outer partition 7 serves as the first water-proof structure within the cavity, separating the outer air inlet chamber from the middle chamber. It works in conjunction with the lower opening to redirect airflow and simultaneously prevents most of the splashed rainwater from spreading into the cabinet. The outer partition 7 is a vertically arranged flat plate, its width matching the internal width of the airflow guide frame 5. The outer partition 7 is positioned within the internal cavity of the airflow guide frame 5, near the base plate 3, and is parallel to the surface of the base plate 3. The upper edge of the outer partition 7 is integrally connected to the top inner wall of the airflow guide frame 5, forming the upper... The outer partition 7 has a gap between its lower edge and the slope of the drainage slope 6. This gap forms the lower air inlet, allowing airflow to flow from the outer cavity into the middle chamber. The two sides of the outer partition 7 are integrally connected to the inner walls of the two sides of the flow guide frame 5, forming a lateral seal. The lower edge of the outer partition 7 bends and extends toward the substrate 3 to form an outer water-blocking flange 9. The flange is continuously set along the length of the outer partition 7 to block the water film that climbs upward along the outer side of the outer partition 7, so that the water film gathers at the flange and drips down to the drainage slope 6.

[0023] The inner partition 8 serves as the second water-proof structure within the cavity, separating the intermediate chamber from the interior space of the cabinet. Together with the upper opening, it creates a secondary airflow deflection, further preventing water mist and accumulated water from intruding into the cabinet. The inner partition 8 is a vertically arranged flat plate, its width matching the internal width of the flow guide frame 5, and its height lower than that of the outer partition 7. The inner partition 8 is located within the interior cavity of the flow guide frame 5, on the side of the outer partition 7 closest to the interior of the cabinet, parallel to the outer partition 7. The lower end of the outer partition 7 is lower than the upper end of the inner partition 8, creating a staggered arrangement. The lower part of the inner partition 8... The upper edge of the inner partition 8 is integrally connected with the high area of ​​the drainage slope 6 to form a sealed partition at the bottom. A gap is left between the upper edge of the inner partition 8 and the top inner wall of the guide frame 5. This gap forms the upper air outlet, allowing airflow to flow from the middle chamber into the cabinet. The two sides of the inner partition 8 are integrally connected with the two sides of the inner wall of the guide frame 5 to form a lateral seal. The upper edge of the inner partition 8 bends and extends toward the outer partition 7 to form an inner water-blocking flange 10. The flange is continuously set along the length of the inner partition 8 to intercept the water mist carried by the upward airflow in the middle chamber, so that the water mist condenses and falls back to the drainage slope 6 along the board surface.

[0024] In this component, the base plate 3, the flow guide frame 5, the drainage slope 6, the outer partition 7 and the inner partition 8 can be integrally formed from the same metal sheet through stamping and bending processes. The connection between each component is an integrally bent continuous structure without splicing gaps, which can improve the overall sealing performance and structural strength of the cavity.

[0025] The ventilation process of this component is as follows: external air enters the outer cavity between the guide frame 5 and the outer partition 7 through the gap between the water guide louvers 4 on the outer side of the substrate 3. The airflow flows downward in the outer cavity and enters the intermediate cavity between the outer partition 7 and the inner partition 8 through the lower air inlet below the outer partition 7. Then the airflow flows upward in the intermediate cavity, bypasses the upper air outlet above the inner partition 8, and finally flows into the internal space of the high voltage cabinet 1, completing the air exchange between the inside and outside of the cabinet and realizing heat dissipation and ventilation.

[0026] The waterproofing and drainage process of this component is as follows: During external rainfall, most rainwater is blocked by the inclined water-guiding louvers 4, dripping downwards along the louver's slope to the outside of the cabinet; a small amount of splashing water and water mist passing through the gaps in the water-guiding louvers 4 enters the outer cavity and settles onto the bottom drainage slope 6 under gravity, flowing along the inclined surface of the drainage slope 6 towards the base plate 3 and being directly discharged to the outside of the cabinet. The water film climbing up the outer surface of the outer partition 7 is blocked by the outer water-retaining flange 9 at the lower end of the outer partition 7, converging into water droplets and falling back to the drainage slope 6 for discharge. A small amount of water mist entering the intermediate chamber with the airflow impacts the inner water-retaining flange 10 at the upper end of the inner partition 8 and the surface of the inner partition 8 during its upward flow, condensing into water droplets and falling down the surface to the drainage slope 6, flowing back along the slope to the outer cavity and being discharged outwards. Because the lower end of the outer partition 7 is lower than the upper end of the inner partition 8, a double-layer water level barrier with different heights is formed. Even if water accumulates in the cavity for a short time, it will need to pass through the two height thresholds of the lower end of the outer partition 7 and the upper end of the inner partition 8 before it can penetrate into the cabinet, thus further improving the reliability of waterproofing.

[0027] When it is necessary to clean and maintain the inside of the component, the connection between the base plate 3 and the side wall of the cabinet can be disconnected, the entire component can be removed from the cabinet, and the internal cavity, drainage slope 6 and partition can be rinsed and wiped. The operation is convenient.

[0028] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A ventilation and waterproof assembly for a high-voltage switchgear, comprising a ventilation hole (2) formed in the side wall of the high-voltage switchgear (1), a base plate (3) covering the outside of the ventilation hole (2), and a plurality of water-guiding louvers (4) spaced apart along the height direction of the base plate (3), characterized in that: The inner periphery of the substrate (3) extends inward to form a flow guide frame (5), and the bottom of the flow guide frame (5) is a drainage slope (6) with the inner side higher than the outer side. The flow guide frame (5) is provided with an outer partition (7) and an inner partition (8). The upper part of the outer partition (7) is sealed to the top of the flow guide frame (5), and the lower part forms a lower air inlet between the outer partition (7) and the drainage slope (6). The inner partition (8) is located on the side of the outer partition (7) near the inside of the cabinet. Its lower part is sealed to the drainage slope (6), and its upper part forms an upper air outlet between the top of the guide frame (5). The lower end of the outer partition (7) is lower than the upper end of the inner partition (8).

2. The ventilation and waterproof assembly for a high-voltage switchgear according to claim 1, characterized in that, The outer partition (7) and the inner partition (8) are integrally formed and sealed to the flow guide frame (5).

3. The ventilation and waterproof assembly for a high-voltage switchgear according to claim 1, characterized in that, The lower end of the outer partition (7) is bent toward the side of the base plate (3) to form an outer water-blocking flange (9).

4. The ventilation and waterproof assembly for a high-voltage switchgear according to claim 1, characterized in that, The upper end of the inner partition (8) is bent toward the side of the outer partition (7) to form an inner water-blocking flange (10).

5. The ventilation and waterproof assembly for a high-voltage switchgear according to claim 1, characterized in that, The lower end of the drainage slope (6) extends to the inner sidewall of the substrate (3).

6. The ventilation and waterproof assembly for a high-voltage switchgear according to claim 1, characterized in that, The substrate (3) is detachably connected to the outside of the side wall of the high voltage cabinet (1) by means of a buckle or bolt.

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