Ventilation and heat dissipation panel structure for preventing internal arc fault

Abstract

The invention relates to a ventilation and heat dissipation panel structure for preventing internal arc faults, which comprises a window type ventilation frame for ventilation and heat dissipation and a protective cover plate matched with the window type ventilation frame, and a metal net is arranged on the window type ventilation frame; the protective cover plate comprises a front panel, an upper inclined plate, a left side plate, a right side plate and a bottom plate; a metal transverse groove and a partition are arranged at the fold between the front panel and the upper inclined plate, the length of the metal transverse groove is larger than that of the partition, and an installation angle is formed between the front panel and the upper inclined plate. A natural convection ventilation opening is formed, and a self-closing cover plate capable of bearing high pressure when internal electric arcs are generated is prefabricated, so that a shell (a door or a sealing plate) is prevented from deforming and breaking or the electric arcs are prevented from overflowing and splashing to hurt touchable personnel.

Description

Technical Field

[0001] The present invention relates to a panel structure, in particular to a panel that can be automatically closed to prevent deformation and cracking of an outer shell (door or cover plate) or arc overflow and splashing that may injure people who can touch it, and a ventilated heat dissipation panel structure that can protect against internal arc faults while also taking ventilation into account. Background Art

[0002] Internal arc fault and temperature rise tests are important items for the safety and performance evaluation of power equipment, and are mainly used in switchgear.

[0003] The purpose of an internal arc fault is to evaluate the safety performance of switchgear during an internal arc fault, ensuring personnel safety and limiting equipment damage. Personnel protection: The equipment casing must be able to withstand the pressure of the arc, with no fragments flying. The arc must not ignite the outside of the equipment, and side panels, panels (doors or cover plates), etc. must not open or break, causing injury to accessible operators. To meet the above requirements, the switchgear casing must have sufficient strength to encapsulate and prevent internal arcs from spilling and splashing, causing injury to personnel. Movable parts such as panels (doors) must remain closed during an internal arc fault.

[0004] The purpose of the temperature rise test is to verify whether the temperature rise of the components, materials, and insulation media of the equipment exceeds the limit under the long-term rated current, so as to avoid insulation aging or failure caused by overheating. In order to meet the temperature rise limit requirements of the cabinet components, materials, and insulation media, the cabinet structure has good ventilation and heat dissipation performance to accelerate the convection exchange between the cabinet and the outside air.

[0005] The internal arc fault test and the temperature rise test have conflicting requirements for the enclosure of the switchgear housing panel (door or cover). Specifically, in the switchgear field, 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. Tightly enclosing the outer panel (door or cover) will cause the temperature rise of the cabinet components, materials, and insulation medium to exceed the limit, resulting in test failure.

[0006] The internal arc fault test and temperature rise test have different requirements for the switchgear casing to meet the corresponding protection level, but they also need to be considered in a coordinated manner. Summary of the Invention

[0007] In response to the above problems, the main purpose of the present invention is to provide a panel that can be self-closing and can prevent the outer shell (door or cover) from deforming and breaking or the arc overflowing and splashing to injure people who can touch it, and a ventilated heat dissipation panel structure that can protect against internal arc faults while taking ventilation into account.

[0008] The present invention solves the above technical problems through the following solutions: A ventilated and heat-dissipating panel structure for protecting internal arc faults, the ventilated and heat-dissipating panel structure for protecting internal arc faults includes: a window-type ventilation frame for ventilation and heat dissipation and a protective cover plate cooperating with the window-type ventilation frame, and a metal mesh is provided on the window-type ventilation frame.

[0009] The protective cover plate 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 an installation angle is formed between the front panel and the upper inclined plate.

[0010] In a specific embodiment of the present invention, the metal mesh is detachably installed on the window-type ventilation frame.

[0011] In a specific embodiment of the present invention, the metal mesh is a metal mesh that changes according to the protection level.

[0012] In a specific embodiment of the present invention, the protective cover plate is bent from the same piece of plate.

[0013] In a specific embodiment of the present invention, the bending parts of the front panel and the upper inclined plate are provided with rounded corners, the bending parts of the front panel and the left and right side plates are provided with rounded corners, and the bending parts of the front panel and the bottom plate are provided with rounded corners.

[0014] In a specific embodiment of the present invention, the degree range of the installation angle is 110 - 150 degrees.

[0015] In a specific embodiment of the present invention, the degree of the installation angle is 120 degrees.

[0016] In a specific embodiment of the present invention, the protective cover plate covers the outside of the window-type ventilation frame.

[0017] In a specific embodiment of the present invention, the length of the metal horizontal groove is 5 - 10 times the length of the partition.

[0018] The positive and progressive effects of the present invention are as follows: The ventilated and heat-dissipating panel structure for protecting internal arc faults provided by the present invention adopts a window-type ventilation structure inside to form a natural convection ventilation port. The present invention prefabricates a high-pressure self-closing cover plate that can withstand the internal arc at the ventilation port to prevent the deformation and rupture of the outer shell (door or sealing plate) or the overflow and splash of the arc from hurting the touchable personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention (front view).

[0020] Figure 2 For Figure 1 Partial enlarged view.

[0021] Figure 3Schematic diagram of the overall structure of the present invention (back side).

[0022] Figure 4-1 is Figure 1 front view of.

[0023] Figure 4-2 is Figure 4-1 A-A cross-sectional view of (front panel in open state).

[0024] Figure 4-3 is Figure 4-1 A-A cross-sectional view of (front panel in closed state).

[0025] Figure 5 Schematic diagram of the structure with a metal mesh provided on the window ventilation frame

[0026] Figure 6-1 Schematic diagram of the overall structure of the protective cover plate (three-dimensional).

[0027] Figure 6-2 Schematic diagram of the overall structure of the protective cover plate (front).

[0028] Figure 6-3 is Figure 6-2 left view of.

[0029] Figure 6-4 is Figure 6-3 view from direction B of.

[0030] Figure 7-1 Schematic diagram of the structure of one of the metal meshes welded to the window ventilation frame

[0031] Figure 7-2 Schematic diagram of the structure of another metal mesh welded to the window ventilation frame

[0032] The following are the names corresponding to the reference numerals in the present invention:

[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 cross groove 205, partition 206, mounting angle 207. Specific embodiments

[0034] The following provides a preferred embodiment of the present invention in conjunction with the accompanying drawings to illustrate the technical solution of the present invention in detail.

[0035] Figure 1 Schematic diagram of the overall structure of the present invention (front), Figure 2 is Figure 1 partial enlarged view of, Figure 3 Schematic diagram of the overall structure of the present invention (back), Figure 4-1 isFigure 1 Front view. Figure 4-2 is Figure 4-1 A - A cross - sectional view of (front panel open state), Figure 4-3 is Figure 4-1 A - A cross - sectional view of (front panel closed state), Figure 5 is a schematic structural diagram of a metal mesh 300 provided on the window - type ventilation frame 100, as shown in the above figure: A structure of a ventilation - heat - dissipating panel for protecting internal arc faults proposed by the present invention, the ventilation - heat - dissipating panel structure for protecting internal arc faults includes: a window - type ventilation frame 100 for ventilation and heat dissipation and a protective cover plate 200 cooperating with the window - type ventilation frame 100, and a metal mesh 300 is provided on the window - type ventilation frame 100.

[0036] In a specific implementation process, the protective cover plate 200 is generally covered outside the window - type ventilation frame 100.

[0037] Figure 6-1 is a schematic overall structural diagram of the protective cover plate (three - dimensional), Figure 6-2 is a schematic overall structural diagram of the protective cover plate (front), Figure 6-3 is Figure 6-2 left view of , Figure 6-4 is Figure 6-3 view from direction B of . As shown in the above figure: The protective cover plate 200 includes: a front panel 201, an upper inclined plate 202, left and right side plates 203, and a bottom plate 204; a metal horizontal groove 205 and a partition wall 206 are provided at the crease between the front panel 201 and the upper inclined plate 202 (see Figure 2 ), the length of the metal horizontal groove 205 is longer than the length of the partition wall 206, and the length of the metal horizontal groove 205 is 5 - 10 times the length of the partition wall 206.

[0038] The front panel 201 and the upper inclined plate 202 form an installation angle 207. In a specific implementation process, the degree range of the installation angle 207 of the present invention is 110 - 150 degrees, and preferably it can be 120 degrees.

[0039] In a specific implementation process, the protective cover plate 200 of the present invention is bent from the same piece of plate.

[0040] In a specific implementation process, the bending parts of the front panel 201 and the upper inclined plate 202 are provided with rounded corners, the bending parts of the front panel 201 and the left and right side plates 203 are provided with rounded corners, and the bending parts of the front panel 201 and the bottom plate 204 are provided with rounded corners.

[0041] Figure 7-1 is a schematic structural diagram of one of the metal meshes welded to the window - type ventilation frame, Figure 7-2Schematic diagram of another structure of the metal mesh for welding the window-type ventilation frame. As shown in the above figure: The metal mesh 300 is detachably installed on the window-type ventilation frame 100, and the metal mesh 300 is a metal mesh that varies according to the protection level.

[0042] In the specific implementation process, when the switchgear (cabinet) of the present invention operates normally, when an internal arc fault occurs, the prefabricated installation angle cover plate of the internal protection cover plate is opened. When an internal arc fault occurs in the switchgear (cabinet), several metal cross grooves have been cut at the prefabricated installation angle folded edge of the internal protection cover plate during the internal arc fault. At this time, the internal pressure in the cable chamber can reach ≥5 bar, or even higher. Under the action of the instantaneously bursting pressure, the internal protection cover plate closes instantaneously, preventing the internal arc from overflowing and splashing to hurt people.

[0043] In the specific implementation process, the switchgear of the present invention is provided with different metal meshes 300 according to the enclosure protection level. The interior of the present invention adopts a window-type ventilation structure to form a natural convection ventilation opening.

[0044] The present invention adopts a window-type ventilation structure to form a natural convection ventilation opening. The ventilation opening is prefabricated with a high-pressure self-closing cover plate that can withstand the internal arc, preventing the deformation and rupture of the enclosure 400 (door or cover plate) or the internal arc from overflowing and splashing to hurt the accessible personnel.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A ventilated heat-dissipating panel structure for protecting against internal arc faults, characterized in that: The described structure of the ventilation and heat dissipation panel for protecting internal 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. A metal mesh is provided on the window-type ventilation frame; The protective cover plate includes: a front panel, an upper inclined plate, left and right side plates, and a bottom plate; a metal cross groove and a partition are provided at the crease between the front panel and the upper inclined plate. The length of the metal cross groove is longer than the length of the partition. An installation angle is formed between the front panel and the upper inclined plate.

2. The ventilable heat dissipation panel structure for protecting internal arc faults according to claim 1, characterized in that: The metal mesh is detachably installed on the window-type ventilation frame.

3. The ventilation and heat dissipation panel structure for protecting internal arc faults according to claim 1 or 2, characterized in that: The metal mesh is a metal mesh that varies according to the protection level.

4. The ventilation and heat dissipation panel structure for protecting internal arc faults according to claim 1, characterized in that: The protective cover plate is formed by bending a single piece of plate.

5. The ventilable heat dissipation panel structure for protecting internal arc faults according to claim 4, characterized in that: The bending parts of the front panel and the upper inclined plate are provided with rounded corners, the bending parts of the front panel and the left and right side plates are provided with rounded corners, and the bending parts of the front panel and the bottom plate are provided with rounded corners.

6. The ventilation and heat dissipation panel structure for protecting internal arc faults according to claim 1, wherein: The degree range of the installation angle is 110 - 150 degrees.

7. The ventilation and heat dissipation panel structure for protecting internal arc faults according to claim 6, characterized in that: The degree of the installation angle is 120 degrees.

8. The ventilation heat dissipation panel structure for protecting internal arc faults according to claim 1, characterized in that: The protective cover plate covers the outside of the window-type ventilation frame.

9. The ventilable heat dissipation panel structure for protecting internal arc faults according to claim 1, wherein: The length of the metal cross groove is 5 - 10 times the length of the partition.

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