A ventilated heat dissipation panel structure for protecting against internal arcing faults
By adopting a window-type ventilation frame and protective cover design in the switchgear, the problems of deformation and cracking of the outer shell panel and arc leakage during internal arc faults are solved, achieving a synergistic effect of safety protection and effective heat dissipation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI NAJIE COMPLETE SETAB OF ELECTRIC
- Filing Date
- 2025-05-23
- Publication Date
- 2026-06-30
AI Technical Summary
When existing switchgear experiences an internal arc fault, the outer panel is prone to deformation and cracking, or arcing may spill out and cause injury. At the same time, insufficient ventilation and heat dissipation performance leads to excessive temperature rise, failing to meet both protection and heat dissipation requirements simultaneously.
It adopts a ventilated heat dissipation panel structure to protect against internal electric arc faults, including a window-type ventilation frame and a protective cover. A metal mesh is set on the ventilation frame to form a natural convection vent, which automatically closes in the event of an electric arc fault to prevent spillage and splashing. The metal mesh can be designed according to the protection level.
It effectively prevents the outer casing from deforming and cracking or the electric arc from splashing out, ensuring personnel safety. At the same time, it achieves effective heat dissipation through natural convection ventilation openings, meeting the protection and heat dissipation needs in the event of an internal electric arc fault.
Smart Images
Figure CN224437443U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a panel structure, specifically to a panel that can be self-closing to prevent deformation and cracking of the outer shell (door or sealing plate) or electric arc spillage and splashing that could injure accessible personnel, while also providing ventilation to protect against internal electric arc faults and allowing for heat dissipation. Background Technology
[0002] Internal arc fault and temperature rise tests are important items for the safety and performance evaluation of power equipment, and are mainly applied to switchgear.
[0003] The purpose of internal arc fault assessment is to evaluate the safety performance of switchgear during internal arc faults, ensuring personnel safety and limiting equipment damage. Personnel protection: The equipment enclosure should be able to withstand arc pressure without fragmentation, the arc should not ignite the exterior of the equipment, and side panels, front panels (doors or sealing panels), etc., should not open or crack, preventing injury to accessible operators. To meet the above requirements, the switchgear enclosure must have sufficient strength to enclose the equipment and prevent injury from internal arc spillage and fragmentation. Moving parts such as front panels (doors) must remain closed during internal arc faults.
[0004] The purpose of the temperature rise test is to verify whether the temperature rise of the equipment's components, materials, and insulation media exceeds the limits under long-term rated current, thus preventing overheating that could lead to insulation aging or failure. To meet the temperature rise limits for all components, materials, and insulation media within the cabinet, the cabinet structure must have good ventilation and heat dissipation performance to accelerate the convection exchange between the inside and outside air of the cabinet.
[0005] The internal arc fault test and the temperature rise test have conflicting requirements for the sealing of the switchgear enclosure panel (door or sealing plate). In the field of switchgear, especially for high-current (≥2500A) cabinet structures, the temperature rise test places extremely high demands on the ventilation and heat dissipation of the cabinet structure. If the enclosure panel (door or sealing plate) is completely sealed, the temperature rise of various components, materials, and insulation media within the cabinet will exceed the limits, resulting in a failed test.
[0006] The requirements for the internal arc fault test and temperature rise test for the switchgear enclosure to meet the corresponding protection level are different but need to be considered together. Utility Model Content
[0007] To address the aforementioned problems, the main objective of this utility model is to provide a self-closing panel that can prevent deformation and cracking of the outer casing (door or sealing plate) or electric arc spillage from injuring accessible personnel, while also providing ventilation to protect against internal electric arc faults and allowing for heat dissipation.
[0008] This utility model solves the above-mentioned technical problems through the following solution: a ventilable heat dissipation panel structure for protecting against internal electric arc faults, the ventilable heat dissipation panel structure for protecting against internal electric arc faults includes: a window-type ventilation frame for ventilation and heat dissipation and a protective cover plate that cooperates with the window-type ventilation frame, and a metal mesh is provided on the window-type ventilation frame.
[0009] The protective cover includes: a front panel, an upper inclined plate, left and right side plates, and a bottom plate; a metal horizontal groove and a partition are provided at the crease between the front panel and the upper inclined plate, the length of the metal horizontal groove is longer than the length of the partition, and the front panel and the upper inclined plate form an installation angle.
[0010] In a specific embodiment of this utility model, the metal mesh is detachably installed on the window ventilation frame.
[0011] In a specific embodiment of this utility model, the metal mesh is a metal mesh that varies according to the protection level.
[0012] In a specific embodiment of this utility model, the protective cover is made by bending the same piece of board.
[0013] In a specific embodiment of this utility model, the bends of the front panel and the upper inclined plate are rounded, the bends of the front panel and the left and right side plates are rounded, and the bends of the front panel and the bottom plate are rounded.
[0014] In a specific embodiment of this utility model, the installation angle ranges from 110 to 150 degrees.
[0015] In a specific embodiment of this utility model, the installation angle is 120 degrees.
[0016] In a specific embodiment of this utility model, the protective cover is placed over the outside of the window-type ventilation frame.
[0017] In a specific embodiment of this utility model, the length of the metal horizontal groove is 5-10 times the length of the partition.
[0018] The positive and progressive effects of this utility model are as follows: The ventilated heat dissipation panel structure provided by this utility model for protecting against internal electric arc faults adopts a window-type ventilation structure inside, forming a natural convection ventilation opening. This utility model prefabricates the ventilation openings with self-closing covers that can withstand the high voltage generated by internal electric arcs, preventing the outer shell (door or sealing plate) from deforming and cracking or the electric arc from overflowing and splashing, which could injure accessible personnel. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention (front view).
[0020] Figure 2 for Figure 1 A magnified view of a portion of the image.
[0021] Figure 3 This is a schematic diagram of the overall structure of this utility model (back side).
[0022] Figure 4-1 for Figure 1 The main view.
[0023] Figure 4-2 for Figure 4-1 AA section view (front panel open).
[0024] Figure 4-3 for Figure 4-1 AA section view (front panel closed).
[0025] Figure 5 A schematic diagram of a window-type ventilation frame with a metal mesh installed.
[0026] Figure 6-1 A schematic diagram (3D) of the overall structure of the protective cover.
[0027] Figure 6-2 A schematic diagram of the overall structure of the protective cover (front view).
[0028] Figure 6-3 for Figure 6-2 The left view.
[0029] Figure 6-4 for Figure 6-3 View B.
[0030] Figure 7-1 A schematic diagram of one type of metal mesh welded to a window-type ventilation frame.
[0031] Figure 7-2 A schematic diagram of another type of metal mesh welded to a window-type ventilation frame.
[0032] The following are the names corresponding to the reference numerals in this utility model:
[0033] Figure 1 -6: Window ventilation frame 100, protective cover plate 200, metal mesh 300, outer shell 400, front panel 201, upper inclined plate 202, left and right side plates 203, bottom plate 204, metal horizontal groove 205, partition 206, installation corner 207. Detailed Implementation
[0034] The preferred embodiments of this utility model are given below with reference to the accompanying drawings to illustrate the technical solution of this utility model in detail.
[0035] Figure 1 This is a schematic diagram of the overall structure of this utility model (front view). Figure 2 for Figure 1 A magnified view of a portion of the image. Figure 3 This is a schematic diagram of the overall structure of this utility model (back side). Figure 4-1 for Figure 1 The main view. Figure 4-2 for Figure 4-1 AA sectional view (front panel open), Figure 4-3 for Figure 4-1 AA section view (front panel closed), Figure 5 The above figure shows a schematic diagram of a window-type ventilation frame 100 with a metal mesh 300. The present invention proposes a ventilated heat dissipation panel structure for protecting against internal electric arc faults. The ventilated heat dissipation panel structure for protecting against internal electric arc faults includes: a ventilated heat dissipation window-type ventilation frame 100 and a protective cover plate 200 that cooperates with the window-type ventilation frame 100. The metal mesh 300 is provided on the window-type ventilation frame 100.
[0036] In practice, the protective cover 200 is generally placed over the outside of the window-type ventilation frame 100.
[0037] Figure 6-1 This is a schematic diagram (3D) of the overall structure of the protective cover. Figure 6-2 This is a schematic diagram of the overall structure of the protective cover (front view). Figure 6-3 for Figure 6-2 Left view, Figure 6-4 for Figure 6-3 View B. As shown in the figure above: The protective cover 200 includes: a front panel 201, an upper inclined plate 202, left and right side plates 203, and a bottom plate 204; a metal transverse groove 205 and a partition 206 are provided at the crease between the front panel 201 and the upper inclined plate 202 (see Figure B). Figure 2 The length of the metal horizontal groove 205 is longer than the length of the partition 206, and the length of the metal horizontal groove 205 is 5-10 times the length of the partition 206.
[0038] The front panel 201 and the upper inclined plate 202 form an installation angle 207. In specific implementation, the degree range of the installation angle 207 of this utility model is 110-150 degrees, preferably 120 degrees.
[0039] In the specific implementation process, the protective cover plate 200 of this utility model is made by bending the same plate.
[0040] In the specific implementation process, the bends of the front panel 201 and the upper inclined plate 202 of this utility model are rounded, the bends of the front panel 201 and the left and right side plates 203 are rounded, and the bends of the front panel 201 and the bottom plate 204 are rounded.
[0041] Figure 7-1 This is a schematic diagram of one type of metal mesh welded to a window-type ventilation frame. Figure 7-2The above figure shows a schematic diagram of another type of metal mesh welded to the window ventilation frame: the metal mesh 300 is detachably installed on the window ventilation frame 100, and the metal mesh 300 is a metal mesh that varies according to the protection level.
[0042] In practical implementation, during normal operation of the switchgear (cabinet) of this utility model, the internal protective cover is pre-installed with a corner cover that opens in the event of an internal arc fault. When an internal arc fault occurs in the switchgear (cabinet), several metal transverse grooves have been pre-cut at the corner fold of the pre-installed internal protective cover. At this time, the internal pressure of the cable compartment can reach ≥5 bar, or even higher. Under the action of instantaneous burst pressure, the internal protective cover closes instantly, preventing the internal arc from overflowing and splashing, thus preventing injury.
[0043] In the specific implementation process, the switchgear of this utility model is equipped with different metal meshes 300 according to the protection level of the enclosure. The interior of this utility model adopts a window-type ventilation structure to form a natural convection ventilation opening.
[0044] This utility model adopts a window-type ventilation structure to form a natural convection ventilation opening. The ventilation opening is prefabricated with a self-closing cover that can withstand the high voltage generated by the internal electric arc, preventing the outer shell 400 (door or sealing plate) from deforming and cracking or the electric arc from overflowing and splashing and injuring accessible personnel.
[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.
Claims
1. A ventilated heat dissipation panel structure for protecting against internal arcing faults, characterized in that: The ventilated heat dissipation panel structure for protecting against internal electric arc faults includes: a ventilated window frame for ventilation and heat dissipation and a protective cover plate that cooperates with the ventilated window frame, wherein a metal mesh is provided on the ventilated window frame; The protective cover includes: a front panel, an upper inclined plate, left and right side plates, and a bottom plate; a metal horizontal groove and a partition are provided at the crease between the front panel and the upper inclined plate, the length of the metal horizontal groove is longer than the length of the partition, and the front panel and the upper inclined plate form an installation angle.
2. The ventilated heat dissipation panel structure for protecting against internal arcing faults according to claim 1, characterized in that: The metal mesh can be detachably installed on the window ventilation frame.
3. The ventilated heat dissipation panel structure for protecting against internal arc faults according to claim 1 or 2, characterized in that: Metal mesh is metal mesh that varies according to the protection level.
4. The ventilated heat dissipation panel structure for protecting against internal arc faults according to claim 1, characterized in that: The protective cover is made by bending a single piece of board.
5. The ventilated heat dissipation panel structure for protecting against internal arc faults according to claim 4, characterized in that: The bends in the front panel and the upper sloping plate are rounded, the bends in the front panel and the left and right side panels are rounded, and the bends in the front panel and the bottom plate are rounded.
6. The ventilated heat dissipation panel structure for protecting against internal arcing faults according to claim 1, characterized in that: The installation angle ranges from 110 to 150 degrees.
7. The ventilated heat dissipation panel structure for protecting against internal arc faults according to claim 6, characterized in that: The installation angle is 120 degrees.
8. The ventilated heat dissipation panel structure for protecting against internal arc faults according to claim 1, characterized in that: The protective cover is placed over the outside of the window-type ventilation frame.
9. The ventilated heat dissipation panel structure for protecting against internal arcing faults according to claim 1, characterized in that: The length of the metal horizontal groove is 5-10 times the length of the partition.