A waterproof power distribution cabinet

Abstract

This utility model relates to a waterproof distribution cabinet, belonging to the field of electrical equipment protection technology. It includes a cabinet body, cabinet door, waterproof top cover, waterproof junction box, and waterproof bottom cladding, achieving waterproof protection through multiple structural elements. The cabinet body sidewalls are equipped with breathable grilles, with arc-shaped water guide plates directing rainwater downwards, and vertical vents pointing downwards to prevent backflow. The cabinet door joints are sealed with an annular sealing strip. The top waterproof cover consists of a sloping water-guiding section, a transition section for drainage, and bolted connections, sealed with a sealing strip, and includes vents to balance internal and external air pressure. The bottom waterproof cladding fully welds to cover the bottom edge of the cabinet body, and a vertical baffle plate and the bottom sealing strip of the cabinet door form a secondary barrier. The waterproof junction box has a waterproof cover sealing its top opening, forming an independent waterproof chamber. This utility model, through multiple layers of protection, effectively prevents rainwater from seeping in from the top, cabinet door, grille, bottom, and junction box, ensuring stable operation of internal equipment in humid or rainy environments.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment protection technology, specifically a waterproof distribution cabinet. Background Technology

[0002] As a crucial power distribution device in power systems, switchboards are widely used outdoors and in humid environments. Their waterproof performance directly affects the operational safety and lifespan of their internal electrical components. However, existing outdoor switchboards still have many shortcomings in their waterproof design: Traditional distribution cabinets often have flat or simply sloping top covers, which allow rainwater to accumulate and seep into the gaps between the cabinet and the top cover. The cabinet door and cabinet body typically have only a single-layer sealing strip, which ages and deforms over time, allowing rainwater to seep in through the joints. The side wall ventilation structures are often designed with straight-outlet openings, allowing rainwater to easily flow back into the cabinet with the airflow, while failing to effectively prevent splashing. Junction boxes, as critical components for wiring connections, are traditionally covered only by simple covers, lacking a sealed and secure structure, making them prone to short circuits due to water ingress in humid environments.

[0003] Chinese patent CN222677322U discloses an outdoor waterproof power distribution cabinet, including a cabinet body and a ventilation opening on one side of the outer wall of the cabinet body. Filter components are installed around the upper end of the water collection component via fixing components. By rotating the externally threaded round tube connected to the inner cavity of the circular screw groove, the externally threaded round tube drives the expansion block to move downward, thereby moving the expansion block from the upper end of the outer wall of the annularly spaced fan-shaped clamping blocks to the lower end of the outer wall. The expansion block clamps the annularly spaced fan-shaped clamping blocks. The lower end of the round rod is set in the inner cavity of the annularly spaced fan-shaped clamping blocks, thus fixing the position of the round rod. Since the lower end of the pressure plate is fixedly installed via a connecting rod and an embedded filter screen, rainwater can directly pass through the double-layer filtration of the filter screen layer and the embedded filter screen before entering the inner cavity of the water collection ring groove. The filter screen layer and the embedded filter screen can also be disassembled and cleaned. The aforementioned device focuses on rainwater filtration and collection, but lacks waterproof design covering key areas such as cabinet doors, bottom, and junction boxes, resulting in poor overall waterproofing of the distribution cabinet. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems in the prior art and improve the waterproof effect of the power distribution cabinet.

[0005] The technical solutions adopted in this utility model are as follows: A waterproof power distribution cabinet includes a cabinet body, a waterproof top cover, a cabinet door, a waterproof junction box, and a handle; The cabinet has symmetrical ventilation grilles on its left and right side walls. The ventilation grilles are arc-shaped and open downwards. The waterproof junction box is fixed inside the cabinet. The waterproof top cover is installed on the top of the cabinet. The cabinet door is pivotally connected to the front opening of the cabinet via a connecting structure. A sealing strip is provided on the contact surface between the cabinet door and the cabinet. The handle is fixed on the outside of the cabinet door. The waterproof junction box includes a box body, a wiring rack, and a waterproof cover. The box body is fixed to the inner wall of the cabinet by bolts. The wiring rack is fixed inside the box body. A wiring terminal is provided through the top of the box body and is located directly above the wiring rack. The waterproof cover seals and covers the top opening of the box body with screws.

[0006] By adopting the above technical solution, the cabinet body and the arc-shaped ventilation grilles on the left and right side walls are integrated. The downward-facing structural design guides rainwater to flow downwards along the arc-shaped surface, preventing rainwater from splashing directly into the cabinet body. The waterproof top cover covers the cabinet body through the top assembly and forms a closed space with the cabinet door through a pivot structure. With the sealing strip on the contact surface between the cabinet door and the cabinet body, it can effectively prevent rainwater from seeping in from the joints. The waterproof junction box body is fixed to the inner wall of the cabinet body with bolts to ensure that the junction box is installed firmly. The wiring terminal on its top passes through the box body and is located directly above the wiring rack, which facilitates the wiring operation. The waterproof cover seals the opening of the box body with screws, forming an independent waterproof chamber to prevent rainwater or moisture from entering the wiring area. The assembly relationship of the above components together constructs the basic waterproof system of the cabinet body, top, cabinet door and wiring area.

[0007] Furthermore, the waterproof top cover is a sheet metal bending integral molding part, including a water passage part, a transition part and a connecting part connected in sequence; The water passage is inclined at 15°-30° relative to the horizontal plane. The end of the water passage near the cabinet door extends vertically downward to form the transition section. The transition section extends horizontally toward the cabinet door to form the connecting section. The connecting section is fixedly connected to the top of the cabinet by bolts. At least three vents are evenly provided on the connecting section, and a sealing strip is provided on the contact end face of the connecting section and the cabinet.

[0008] By adopting the above technical solution, the waterproof top cover is formed by integrally bending sheet metal into a water-passing section, a transition section, and a connecting section, which are connected in sequence. The water-passing section is set at an inclination of 15°-30° to quickly guide rainwater away from the cabinet door, preventing water accumulation. The vertically extending structure of the transition section connects the water-passing section and the connecting section, forming a water-guiding path for rainwater and preventing rainwater from dripping directly from the edge of the top cover into the connection gap between the cabinet and the top cover. The connecting section extends horizontally towards the cabinet door and is fixed to the top of the cabinet with bolts. The sealing strip on the end face of the connecting section further seals the connection gap. At the same time, the vent in the connecting section can balance the air pressure inside and outside the cabinet, preventing internal moisture accumulation due to excessive sealing. The above assembly relationship realizes the functions of water guidance, sealing, and ventilation of the top cover, improving the reliability of the top waterproofing.

[0009] Furthermore, the left or right side wall of the cabinet is provided with at least four connecting protrusions at intervals along the vertical direction, each connecting protrusion including two parallel lugs; the cabinet door is provided with a connecting post on one side corresponding to the connecting protrusion, and the connecting post is rotatably installed between the lugs of two adjacent sets of connecting protrusions by means of a pin.

[0010] By adopting the above technical solution, multiple sets of connecting protrusions are arranged vertically along the side wall of the cabinet, and are pivotally connected to the connecting posts on the side of the cabinet door by pins. The cooperation between the multiple sets of protrusions and the connecting posts can distribute the weight of the cabinet door and the stress when opening and closing, avoiding cabinet door deformation or sealing failure caused by unilateral force. The pin connection structure between adjacent protrusions and connecting posts not only ensures that the cabinet door can be opened and closed flexibly, but also enhances the tightness of the closure between the cabinet door and the cabinet body through multiple fixing points, ensuring that the sealing strip at the contact end of the cabinet door and the cabinet body can be evenly pressurized, and improving the waterproof sealing performance at the joint.

[0011] Furthermore, the ventilation grille is formed by stamping from the side wall of the cabinet, and includes an arc-shaped water guide plate and ventilation holes opened at the bottom of the arc-shaped water guide plate, with the opening direction of the ventilation holes being vertically downward.

[0012] By adopting the above technical solution, the ventilation grille is directly stamped from the side wall of the cabinet, forming an integrated structure with the cabinet, thus avoiding the risk of water seepage from gaps that may be caused by additional installation components; the convex structure of the arc-shaped water guide plate can guide rainwater to flow downward along the arc-shaped surface, while the ventilation holes opened at the bottom of the arc-shaped water guide plate are vertically downward, so rainwater cannot directly enter the ventilation holes due to gravity, while external airflow can enter the cabinet through the ventilation holes to achieve heat dissipation. The above assembly relationship ensures the ventilation requirements inside the cabinet while structurally blocking the path of rainwater backflow through the ventilation grille.

[0013] Furthermore, the bottom of the cabinet is provided with a waterproof steel cladding, which is made of stainless steel and is fixed to the bottom edge of the cabinet by a full welding process.

[0014] By adopting the above technical solution, the bottom of the cabinet is fixed with a waterproof stainless steel cladding through a full welding process. The full welding process can eliminate welding gaps and prevent water from the ground from seeping into the cabinet through the weld seams. Stainless steel has strong corrosion resistance and can resist the erosion of humid environments for a long time. The tight fit between the waterproof cladding and the bottom edge of the cabinet covers the contact gap between the bottom of the cabinet and the ground, preventing water from the ground from seeping into the interior along the bottom edge of the cabinet. The above assembly relationship strengthens the waterproof capability of the bottom of the cabinet and extends the service life of the equipment in humid or low-lying environments.

[0015] Furthermore, the waterproof metal casing has an L-shaped structure, including a horizontal connecting plate and a vertical shielding plate; the horizontal connecting plate is welded and fixed to the bottom surface of the cabinet, and the vertical shielding plate extends towards the cabinet door and has a sealing strip on its contact surface with the bottom of the cabinet door.

[0016] By adopting the above technical solution, the horizontal connecting plate of the L-shaped waterproof iron casing is welded and fixed to the bottom surface of the cabinet, covering the bottom edge of the cabinet; the vertical baffle extends towards the cabinet door and is sealed with a sealing strip at the bottom end of the cabinet door, forming a double protection structure: the horizontal connecting plate prevents water from the ground from directly seeping into the bottom of the cabinet, and the vertical baffle, together with the sealing strip, can block the water seepage path between the bottom of the cabinet door and the ground. The assembly relationship of the two works together to further improve the waterproof sealing of the connection between the bottom of the cabinet and the cabinet door, and prevent rainwater from seeping in from both the bottom and the bottom edge of the cabinet door.

[0017] This utility model has the following beneficial effects: 1. This utility model uses symmetrically arranged arc-shaped ventilation grilles on the left and right side walls of the cabinet to be integrally stamped with the cabinet body. The downward opening structure design, combined with the vertically downward ventilation holes at the bottom of the arc-shaped water guide plate, prevents rainwater from directly entering the ventilation holes when it flows down the arc surface. At the same time, the integrated structure of the ventilation grille and the cabinet body avoids additional installation gaps, effectively solving the problem of rainwater backflow in traditional ventilation structures. 2. This utility model uses sheet metal bending to form an integral assembly of the water-passing part, transition part and connecting part of the waterproof top cover, and with the sealing strip on the contact end face of the connecting part and the cabinet body, to form a structure that quickly guides rainwater away and seals the joint, preventing rainwater from lingering on the top cover and seeping into the connection gap between the cabinet body and the top cover, thus solving the problem of water accumulation and leakage in traditional top covers. 3. This utility model uses a pivotal connection structure between the cabinet door and the cabinet body via multiple sets of connecting protrusions, connecting columns, and pins. Combined with the sealing strip on the contact surface between the cabinet door and the cabinet body, the multiple sets of protrusions and connecting columns distribute the force on the cabinet door, ensuring that the sealing strip is evenly pressurized. This effectively blocks the path of rainwater seeping in from the joint between the cabinet door and the cabinet body, solving the problem of easy water leakage at the joint of traditional cabinet doors. 4. This utility model uses an L-shaped stainless steel waterproof iron-clad horizontal connecting plate at the bottom of the cabinet to be fully welded and fixed to the bottom surface of the cabinet. It is assembled with a vertical baffle plate extending towards the cabinet door and a sealing strip set at the bottom of the cabinet door to form a double protection structure. This prevents water from the ground from seeping in along the bottom edge of the cabinet or the bottom of the cabinet door, thus solving the problem of water easily entering the bottom of traditional power distribution cabinets. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is the left view of the present invention; Figure 3 This is a schematic diagram of the junction box of this utility model; Figure 4 This is a schematic diagram of the internal structure of the junction box of this utility model; Figure 5 This is a schematic diagram of the structure of this utility model after the cabinet door has been removed; Figure 6 This is a schematic diagram of the structure of the waterproof top cover of this utility model.

[0019] Among them, 1-cabinet body; 11-ventilation grille; 111-arc-shaped water guide plate; 112-ventilation hole; 12-connecting protrusion; 2-waterproof top cover; 21-water passage part; 22-transition part; 23-connecting part; 231-ventilation port; 3-cabinet door; 31-connecting column; 4-waterproof junction box; 41-box body; 42-junction rack; 43-waterproof cover; 44-terminal; 5-handle; 6-sealing strip; 7-pin; 8-waterproof iron sheath; 81-horizontal connecting plate; 82-vertical baffle plate. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0021] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.

[0022] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As can be seen, this utility model discloses a waterproof distribution cabinet. The cabinet body 1 serves as the main frame of the device. Symmetrically, the left and right side walls are provided with ventilated grilles 11 integrally stamped with the side walls of the cabinet body. These grilles consist of an arc-shaped water guide plate 111 and vertically downward vent holes 112 at the bottom, with no additional connection gaps between them and the cabinet body. At least four connecting protrusions 12 are arranged at intervals along the vertical direction on the left or right side wall of the cabinet body 1. Each connecting protrusion contains two parallel lugs for pivot connection with the connecting post 31 of the cabinet door 3. The cabinet body 1 is equipped with a waterproof junction box 41 fixedly installed inside the cabinet body 1 by bolts. A junction frame 42 is fixedly installed on the inner wall of the junction box 41. The terminal 44 passes through the top of the junction box 41 and is directly above the junction frame 42. The waterproof cover 43 is sealed with screws to cover the top opening of the junction box 41, forming an independent waterproof chamber. The cabinet door 3 is pivotally connected to the front opening of the cabinet body 1 via a connecting structure: its connecting post 31 is inserted between the lugs of two adjacent sets of connecting protrusions 12, and is rotatably installed by a pin 7 passing through the lugs and connecting post 31; the contact surface between the cabinet door 3 and the cabinet body 1 is tightly fitted with a sealing strip 6 to seal the joint, and a handle 5 is fixed on the outside for operation and opening / closing. The waterproof top cover 2 is a sheet metal bending integral molding part, which is composed of a water passage part 21, a transition part 22 extending vertically downward, and a connecting part 23 extending horizontally towards the cabinet door, connected in sequence; the connecting part 23 is fixedly connected to the top of the cabinet body 1 by bolts, and a sealing strip 6 is provided on its contact surface with the cabinet body 1. At the same time, at least three vents 231 are evenly opened on the connecting part 23 to balance the air pressure inside and outside the cabinet. The bottom of the cabinet 1 is fixed with an L-shaped waterproof iron plate 8 made of stainless steel by full welding process. Its horizontal connecting plate 81 is welded to the bottom surface of the cabinet 1 to cover the contact gap between the bottom edge of the cabinet and the ground. The vertical shielding plate 82 extends towards the cabinet door 3 and a sealing strip 6 is set on the bottom end face of the cabinet door 3 to form a secondary shielding of the bottom gap of the cabinet door.

[0023] In one embodiment, refer to Figure 1 , Figure 2 and Figure 6It can be seen that the waterproof top cover 2 is a sheet metal bending integral molding part, which is composed of a water passage part 21, a transition part 22, and a connecting part 23 connected in sequence. Its connection and waterproofing mechanism are as follows: In terms of connection method, the water passage part 21 is set at an angle of 15°-30° above the top of the cabinet body 1. Its end near the cabinet door 3 extends vertically downward to form the transition part 22. The transition part 22 then extends horizontally towards the cabinet door 3 to form the connecting part 23. Finally, it is fixedly connected to the top of the cabinet body 1 by bolts through the connecting part 23 to achieve a stable assembly of the top cover and the cabinet body; In terms of waterproofing mechanism, the 15°-30° inclined design of the water passage part 21 can quickly guide rainwater away from the cabinet door 3. To prevent water accumulation, the transition section 22 extends vertically downwards, connecting the water-passing section 21 and the connecting section 23, forming a water-guiding path for rainwater and preventing rainwater from dripping directly from the edge of the top cover to the joint between the cabinet body 1 and the top cover. At the same time, a sealing strip 6 is provided on the contact end face between the connecting section 23 and the top of the cabinet body 1. After being tightened by bolts, the sealing strip 6 is deformed under pressure and fills the joint gap, blocking the path of rainwater seeping in from the joint between the top cover and the cabinet body. In addition, at least three vents 231 evenly opened on the connecting section 23 can balance the air pressure inside and outside the cabinet, avoiding the accumulation of internal moisture due to excessive sealing, indirectly improving waterproof reliability and reducing moisture, which can reduce the risk of water leakage.

[0024] In one embodiment, refer to Figure 3 and Figure 4 As can be seen, during installation, the box 41 is fixed to the inner wall of the cabinet 1 with bolts, and the wiring bracket 42 is fixed inside. The wiring terminal 44 passes through the top of the box 41 and is directly above the wiring bracket 42, forming a vertically corresponding structure between the wiring terminal and the wiring bracket. In terms of waterproofing, the top opening of the box 41 is covered by a waterproof cover 43, which is fastened to the box 41 with screws, sealing and covering the top opening, blocking the path of external water seeping in from the top of the box, thereby forming an independent waterproof chamber inside the box, protecting the wiring bracket 42 and the wiring terminal 44 from water immersion.

[0025] Working principle: The cabinet body 1 serves as the main frame. Its left and right side walls have ventilation grilles 11 composed of arc-shaped water guide plates 111 and vertical ventilation holes 112 at the bottom. The arc-shaped water guide plates 111 guide rainwater to slide down the outside, while the vertical ventilation holes 112 are downward-facing to prevent rainwater backflow. This achieves both internal ventilation and heat dissipation while preventing rainwater from seeping in through the ventilation grilles 11. The cabinet door 3 is pivotally connected to the connecting column 31 via connecting protrusions 12. With the sealing strip 6 on the contact surface, the joint is seamless when closed, preventing rainwater from entering from the joint between the cabinet door and the cabinet body. The top waterproof cover 2's water-passing part 21 is inclined at 30°, directing rainwater away from the cabinet door. The transition part 22 extends vertically downwards to form a water-guiding path, preventing rainwater from dripping directly into the joint between the cabinet body and the top cover. The connecting part 23 is fixed to the cabinet body with bolts and the joint is sealed with the sealing strip 6. Simultaneously, the ventilation holes 231 balance the internal and external air pressure, reducing the risk of internal dampness. The waterproof metal sheath 8 at the bottom of the cabinet fully welds over the seam between the bottom edge of the cabinet and the ground. Its vertical baffle 82 and the sealing strip 6 at the bottom of the cabinet door form a secondary barrier to prevent water from seeping in from the bottom. The housing 41 of the waterproof junction box 4 is fixed to the cabinet with bolts. The wiring terminal 44 passes through the top of the housing and faces the wiring rack 42. The waterproof cover 43 seals the opening of the housing with screws, forming an independent waterproof chamber to protect the wiring parts from water immersion.

[0026] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A waterproof power distribution cabinet, characterized in that: Includes cabinet body (1), waterproof top cover (2), cabinet door (3), waterproof junction box (4) and handle (5); The cabinet (1) has symmetrical ventilation grilles (11) on its left and right side walls. The ventilation grilles (11) are arc-shaped and open downwards. The waterproof junction box (4) is fixed inside the cabinet (1). The waterproof top cover (2) is installed on the top of the cabinet (1). The cabinet door (3) is pivotally connected to the front opening of the cabinet (1) through a connecting structure. A sealing strip (6) is provided on the contact end face between the cabinet door (3) and the cabinet (1). The handle (5) is fixed on the outside of the cabinet door (3). The waterproof junction box (4) includes a box body (41), a wiring bracket (42), and a waterproof cover (43). The box body (41) is fixed to the inner wall of the cabinet (1) by bolts. The wiring bracket (42) is fixed inside the box body (41). A wiring terminal (44) is provided through the top of the box body (41) and the wiring terminal (44) is located directly above the wiring bracket (42). The waterproof cover (43) seals and covers the top opening of the box body (41) with screws.

2. The waterproof distribution cabinet according to claim 1, characterized in that: The waterproof top cover (2) is a sheet metal bending integral molding part, including a water passage part (21), a transition part (22) and a connecting part (23) connected in sequence. The water passage (21) is inclined at 15°-30° relative to the horizontal plane. The end of it near the cabinet door (3) extends downward in the vertical direction to form the transition part (22). The transition part (22) extends in the horizontal direction towards the cabinet door (3) to form the connecting part (23). The connecting part (23) is fixedly connected to the top of the cabinet body (1) by bolts. At least three vents (231) are evenly opened on the connecting part (23), and a sealing strip (6) is provided on the contact end face of the connecting part (23) and the cabinet body (1).

3. The water-proof power distribution cabinet according to claim 1, wherein: The left or right side wall of the cabinet (1) is provided with at least four connecting protrusions (12) spaced vertically, each connecting protrusion (12) including two parallel lugs; the cabinet door (3) is provided with a connecting post (31) on one side corresponding to the connecting protrusion (12), the connecting post (31) is rotatably installed between the lugs of two adjacent sets of connecting protrusions (12) by means of a pin (7).

4. The water-proof power distribution cabinet of claim 1, wherein: The ventilation grille (11) is formed by stamping the side wall of the cabinet (1) and includes an arc-shaped water guide plate (111) and a ventilation hole (112) opened at the bottom of the arc-shaped water guide plate (111). The opening direction of the ventilation hole (112) is vertically downward.

5. The water-proof power distribution cabinet of claim 1, wherein: The bottom of the cabinet (1) is provided with a waterproof iron plate (8), which is made of stainless steel and is fixed to the bottom edge of the cabinet (1) by full welding process.

6. The water-proof power distribution cabinet according to claim 5, characterized in that: The waterproof iron package (8) is in L-shaped structure as a whole, comprising a horizontal connecting plate (81) and a vertical shielding plate (82); the horizontal connecting plate (81) is welded and fixed with the bottom surface of the cabinet body (1), and the vertical shielding plate (82) extends to the direction of the cabinet door (3) and is provided with a sealing strip (6) at the contact end surface of the bottom of the cabinet door (3).

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