Pressure relief type explosion-proof cabinet door and electrical cabinet

Abstract

The utility model belongs to the electrical field, concretely relates to a kind of pressure relief type explosion-proof cabinet door and electrical cabinet, including door panel, rupture plate and cover body, the door panel surface is provided with opening, the rupture plate is fixedly arranged on door panel and closes the opening, and the strength of rupture plate is less than the strength of door panel, the cover body is fixedly arranged on the outside of door panel and covers the area where opening is, and cover body is provided with air hole.The utility model can reduce the damage degree caused by high-pressure gas in the cabinet body, and only the rupture plate that is broken needs to be replaced in later period, the cabinet door maintenance cost is lower, and the anti-breakage strength of rupture plate can be controlled by selecting different materials or different thickness of materials, the consistency of explosion-proof pressure relief effect is more easily guaranteed, and the safety is higher.

Description

Technical Field

[0001] This utility model belongs to the field of electrical engineering, specifically relating to a pressure relief explosion-proof cabinet door and an electrical cabinet. Background Technology

[0002] When equipment such as traction converters and high-voltage boxes on subway cars experiences a short circuit or abnormal grounding, the current surges dramatically, releasing a large amount of energy instantaneously. This can cause components to explode or air to expand rapidly, with the high-pressure gas impacting the cabinet door, causing it to deform or even detach. If the cabinet door detaches and falls onto the tracks, it will pose a serious danger to the moving train. Furthermore, subsequent maintenance requires replacing the entire cabinet door, resulting in high maintenance costs.

[0003] To address this, existing technologies offer several pressure-relief cabinet doors. A common approach involves creating an opening in the door and installing a baffle on the outside of the opening to seal it. Under normal conditions, the baffle is held in place by fasteners. When high-pressure gas inside the cabinet impacts the door, the baffle's fasteners are broken and loosened, causing the baffle to open and releasing the high-pressure gas through the opening. Rivets are commonly used as fasteners, but after riveting, rivets are prone to inconsistent tensile strength and significant dispersion, sometimes resulting in some rivets remaining undamaged, affecting the explosion-proof pressure relief effect. Furthermore, when rivets are broken and loosened, they can easily fly out and injure people, posing a safety hazard. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a pressure relief explosion-proof cabinet door and electrical cabinet that reduces the damage caused by high-pressure gas inside the cabinet, requires only replacement of the broken plate afterward, has lower maintenance costs, makes it easier to ensure the consistency of explosion-proof pressure relief effect, and can prevent fragments from flying out and injuring people, thus providing higher safety.

[0005] The present invention provides a pressure relief explosion-proof cabinet door, including a door panel, a fracture plate, and a cover. The door panel has an opening through it. The fracture plate is fixedly mounted on the door panel and closes the opening. The strength of the fracture plate is less than that of the door panel. The cover is fixedly mounted on the outside of the door panel and covers the area where the opening is located. The cover has air holes.

[0006] Furthermore, the vent is located on the downward-facing side of the cover.

[0007] Furthermore, the rupture plate is fixed to the door panel with bolts, and a sealing element is provided between the edge of the rupture plate and the door panel.

[0008] Furthermore, it also includes a pressure plate through which the bolts connect the fracture plate and the door panel, the pressure plate being used to apply pressure to the fracture plate in the direction of the door panel.

[0009] Furthermore, it also includes flat washers and spring washers, which are disposed between the head of the bolt and the pressure plate.

[0010] Furthermore, the fixed connection between the fracture plate and the door panel is located within the coverage area of ​​the cover.

[0011] Furthermore, the door panel is equipped with a door lock and hooks for hanging on the cabinet.

[0012] Furthermore, a vent valve is provided on the door panel.

[0013] Furthermore, a handle is provided on the door panel.

[0014] This utility model also provides an electrical cabinet equipped with a pressure relief explosion-proof cabinet door as described above.

[0015] The beneficial effects of this invention are that when an explosion or rapid air expansion occurs inside the cabinet, the fracture plate breaks first under stress, and high-pressure gas rushes out through the opening at the fracture point, and then is discharged to the outside through the vents on the cover. This reduces the damage of high-pressure gas to other cabinet door components, avoids or reduces deformation of other cabinet door components, does not affect the normal function of other cabinet door components, and reduces the degree of damage to the cabinet door caused by high-pressure gas inside the cabinet. In the future, only the fracture plate that has been ruptured needs to be replaced, reducing the maintenance cost of the cabinet door. Moreover, the fracture strength of the fracture plate can be controlled by selecting materials of different materials or thicknesses, making it easier to ensure the consistency of the explosion-proof and pressure relief effect. While ensuring the normal outward discharge of high-pressure gas, the cover can also intercept the fracture plate, preventing fragments from flying out and injuring people, thus improving safety. Attached Figure Description

[0016] Figure 1 This is a front view of the pressure relief explosion-proof cabinet door of this utility model.

[0017] Figure 2 This is a longitudinal section diagram of the pressure relief explosion-proof cabinet door of this utility model.

[0018] Figure 3 This utility model Figure 2 Enlarged view of point A in the image.

[0019] Figure 4 This is a schematic diagram of the structure of the cover of this utility model.

[0020] In the diagram: 1. Door panel; 2. Opening; 3. Cracked panel; 4. Cover; 401. Air hole; 5. Bolt; 6. Seal; 7. Pressure plate; 8. Flat washer; 9. Spring washer; 10. Hook; 11. Door lock; 12. Vent valve; 13. Handle. Detailed Implementation

[0021] like Figures 1-4 As shown, this utility model provides a pressure-relief explosion-proof cabinet door, including a door panel 1, a fracture plate 3, and a cover 4. An opening 2 is provided through the surface of the door panel 1. The fracture plate 3 is fixedly mounted on the door panel 1 and closes the opening 2. The strength of the fracture plate 3 is less than the strength of the door panel 1, meaning that the fracture plate 3 fractures faster under stress than the door panel 1. The cover 4 is fixedly mounted on the outside of the door panel 1 and covers the area where the opening 2 is located. The cover 4 is provided with air holes 401 to allow airflow.

[0022] Based on the above design, when this invention is applied to a cabinet, in the event of an explosion or rapid air expansion inside the cabinet, the high-pressure gas acts on the cabinet door. Due to the lower strength of the fracture plate 3, it fractures first under stress. The high-pressure gas then escapes through the opening 2 and is discharged to the outside through the vent 401 on the cover 4. This reduces the damage to other cabinet door components caused by the high-pressure gas, avoids or reduces deformation of these components, and does not affect their normal function. It also reduces the extent of damage to the cabinet door caused by the high-pressure gas inside the cabinet. Later, only the fractured plate 3 needs to be replaced, reducing the maintenance cost of the cabinet door. Furthermore, this invention allows for control of the fracture strength of the fracture plate 3 by selecting different materials or thicknesses, making it easier to ensure consistent explosion-proof and pressure-relief effects. The cover 4, while ensuring the normal outward discharge of high-pressure gas, also intercepts the fractured plate 3, preventing fragments from flying out and injuring people, thus enhancing safety.

[0023] In this invention, preferably, the vent 401 is located on the downward-facing side of the cover 4, that is, on the side of the cover 4 facing the ground. Specifically, when the electrical cabinet containing the cabinet door is vertically mounted on the vehicle, the orientation of the cabinet door is as follows: Figure 2 As shown, the side of the cover 4 facing downwards is... Figure 2 The bottom surface in view. Based on this setting, rainwater is less likely to enter the interior of the cover 4 through the air vents 401 in rainy weather. Therefore, even if the broken plate 3 breaks in rainy weather, rainwater is less likely to enter the interior of the cabinet, thus avoiding adverse effects of rainwater on the internal components of the cabinet.

[0024] The fracture plate 3 is fixed to the door panel 1 by bolts 5, and a sealing element 6 is provided between the edge of the fracture plate 3 and the door panel 1 to ensure the sealing protection level of the cabinet door. Specifically, this utility model also includes a pressure plate 7, through which the bolts 5 pass to connect the fracture plate 3 and the door panel 1. The pressure plate 7 is used to apply pressure to the fracture plate 3 in the direction of the door panel 1 to effectively press and fix the fracture plate 3 and the sealing element 6, further improving the reliability of the seal. Preferably, this utility model also includes a flat washer 8 and a spring washer 9, which are disposed between the head of the bolt 5 and the pressure plate 7 to distribute pressure and prevent loosening.

[0025] The fixed connection between the cracked plate 3 and the door panel 1 is located within the coverage area of ​​the cover 4. Based on this setting, the fixed connection between the cracked plate 3 and the door panel 1 can be protected to a certain extent and prevent external rainwater erosion.

[0026] The door panel 1 is equipped with a door lock 11 and a hook 10. The entire cabinet door is hung on the cabinet body via the hook 10. A reinforcing plate is provided on the inner side of the door panel 1 at the mounting location of the door lock 11. The door lock 11 is specifically installed on the door panel 1 and the reinforcing plate. A vent valve 12 is provided on the door panel 1. When the cabinet door is installed on the cabinet body, the entire cabinet is in a sealed state. The vent valve 12 is used to maintain the air pressure inside the cabinet and the air pressure outside the cabinet at the same level under normal conditions.

[0027] The door panel 1 is provided with a handle 13 to facilitate moving and taking out the entire cabinet door.

[0028] This utility model also provides an electrical cabinet, which can be a cabinet for equipment such as traction converters and high-voltage boxes, or other control cabinets. The electrical cabinet is equipped with a pressure-relief explosion-proof door as described above. Due to the presence of this door, when an explosion occurs inside the cabinet or air expands rapidly, the rupture plate 3 is the first to rupture under pressure. High-pressure gas rushes out through the rupture point along the opening 2, and then is discharged to the outside through the vent 401 on the cover 4. This reduces the damage of high-pressure gas to other components of the cabinet door, avoids or reduces deformation of other components, and does not affect the normal function of other components. It also reduces the degree of damage to the cabinet door caused by high-pressure gas inside the cabinet. Later, only the ruptured plate 3 needs to be replaced, reducing the maintenance cost of the cabinet door. Furthermore, the rupture strength of the plate 3 can be controlled by selecting different materials or thicknesses, making it easier to ensure the consistency of the explosion-proof and pressure-relief effect. The cover 4, while ensuring the normal outward discharge of high-pressure gas, can also intercept the ruptured plate 3, preventing fragments from flying out and injuring people, thus increasing safety.

[0029] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0030] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A pressure-relief explosion-proof cabinet door, characterized in that, The device includes a door panel (1), a cracked plate (3), and a cover (4). The door panel (1) has an opening (2) through it. The cracked plate (3) is fixedly installed on the door panel (1) and closes the opening (2). The strength of the cracked plate (3) is less than that of the door panel (1). The cover (4) is fixedly installed on the outside of the door panel (1) and covers the area where the opening (2) is located. The cover (4) has air holes (401).

2. The pressure-relief explosion-proof cabinet door as described in claim 1, characterized in that, The air hole (401) is located on the side of the cover (4) facing downwards.

3. The pressure-relief explosion-proof cabinet door as described in claim 1 or 2, characterized in that, The rupture plate (3) is fixed to the door panel (1) by bolts (5), and a sealing element (6) is provided between the edge of the rupture plate (3) and the door panel (1).

4. The pressure-relief explosion-proof cabinet door as described in claim 3, characterized in that, It also includes a pressure plate (7), through which the bolt (5) passes to connect the fracture plate (3) and the door panel (1), the pressure plate (7) being used to apply pressure to the fracture plate (3) in the direction of the door panel (1).

5. The pressure-relief explosion-proof cabinet door as described in claim 4, characterized in that, It also includes a flat washer (8) and a spring washer (9), which are disposed between the head of the bolt (5) and the pressure plate (7).

6. The pressure-relief explosion-proof cabinet door as described in any one of claims 1, 2, 4, and 5, characterized in that, The fixed connection between the fracture plate (3) and the door panel (1) is located within the coverage area of ​​the cover (4).

7. The pressure-relief explosion-proof cabinet door as described in any one of claims 1, 2, 4, and 5, characterized in that, The door panel (1) is provided with a door lock (11) and a hook (10) for hanging on the cabinet.

8. The pressure-relief explosion-proof cabinet door as described in any one of claims 1, 2, 4, and 5, characterized in that, A vent valve (12) is provided on the door panel (1).

9. The pressure-relief explosion-proof cabinet door as described in any one of claims 1, 2, 4, and 5, characterized in that, The door panel (1) is provided with a handle (13).

10. An electrical cabinet, characterized in that, It is equipped with a pressure-relief explosion-proof cabinet door as described in any one of claims 1-9.

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