Electrical cabinet enclosure structure

Abstract

This utility model discloses an electrical cabinet enclosure structure. The outer enclosure has an internal reinforcing structure and a pressure relief valve at its bottom. The reinforcing structure includes reinforcing beams and ribs arranged vertically, horizontally, and longitudinally within the outer enclosure. The reinforcing beams are located at the junction of adjacent end plates, and the ribs are located on the inner side of the end plates. The rear end plate of the outer enclosure is connected to the ribs via a snap-fit ​​structure. This utility model, with its reinforcing structure featuring at least reinforcing beams and ribs in the vertical, horizontal, and longitudinal directions within the outer enclosure, increases the enclosure's strength. Even under conditions of high arcing current, the enclosure will not deform or crack, resulting in a more robust and reliable structure with higher safety performance. The snap-fit ​​structure connecting the rear end plate to the ribs further enhances the rear end plate's strength and connection reliability, further improving safety performance.

Description

Technical Field

[0001] This utility model belongs to the field of high voltage electrical equipment manufacturing technology, specifically relating to an electrical cabinet enclosure structure for medium voltage power distribution systems, and particularly a sealed enclosure design with enhanced mechanical strength and arc protection performance. Background Technology

[0002] Electrical cabinets, as key equipment in modern power distribution networks, achieve miniaturization and improved operational reliability by sealing high-voltage components within an enclosure filled with insulating gas. The enclosure, as the core component of the electrical cabinet, not only needs to ensure airtightness during long-term operation but must also be able to withstand extreme electrodynamic and thermal stresses in the event of internal faults.

[0003] Currently, the industry typically uses internal arc testing to verify the safety performance of electrical cabinets. This test simulates a short-circuit arc fault within the cabinet (e.g., test conditions of 20kA / 1s), verifying whether the cabinet structure can effectively withstand the high-temperature and high-pressure impact generated by the arc, ensuring effective control of fault energy, and preventing cabinet rupture from harming personnel and equipment. However, existing electrical cabinet gas boxes often exhibit the following technical problems when subjected to high-current arc testing: First, due to insufficient structural strength, the cabinet is prone to permanent deformation under the enormous pressure generated by the arc, affecting the continued use of the equipment; second, the welded areas and door sealing structures are prone to failure under pressure impact, leading to gas leakage and reduced protective performance; furthermore, some cabinet designs fail to properly guide pressure release, posing a risk of localized rupture. These problems limit further improvements in the safety performance of electrical cabinets, urgently requiring the development of new cabinet structures to solve these technical challenges. Utility Model Content

[0004] In response to the shortcomings of existing electrical cabinets, such as insufficient robustness, reliability, and safety, the applicant provides a structurally sound electrical cabinet enclosure that will not deform or crack even under conditions of high arcing current. This enclosure structure is more robust, reliable, and offers higher safety performance.

[0005] The technical solution adopted in this utility model is as follows: An electrical cabinet enclosure structure includes a reinforcing structure inside the outer enclosure and a pressure relief valve at the bottom of the outer enclosure. The reinforcing structure includes reinforcing beams and reinforcing ribs arranged vertically, horizontally, and longitudinally inside the outer enclosure. The reinforcing beams are located at the joint of two adjacent sealing plates of the outer enclosure, and the reinforcing ribs are located on the inner side of the sealing plates. The rear sealing plate of the outer enclosure is connected to the reinforcing ribs by a snap-fit ​​structure.

[0006] As a further improvement to the above technical solution: The inner side of the rear sealing plate is provided with at least one vertical rib and at least one horizontal rib. Several horizontal locking rods are provided on the vertical ribs facing the rear sealing plate. Several locking hooks are provided on the rear sealing plate accordingly, and the locking hooks are engaged with the locking rods.

[0007] The rear end plate is equipped with a second hook corresponding to the horizontal rib, which is snapped onto the horizontal rib.

[0008] The vertical reinforcement bars have notches corresponding to the horizontal reinforcement bars, and the horizontal reinforcement bars pass through the notches in the vertical beams; the horizontal reinforcement bars are connected to the reinforcing beams.

[0009] The outer casing includes a front sealing plate, with at least one vertical rib on the inner side of the front sealing plate. The lateral positions of the vertical ribs on the inner sides of the front sealing plate and the rear sealing plate correspond to each other, and several longitudinal bars are respectively provided between the front and rear vertical ribs corresponding to each other.

[0010] Several longitudinal ribs are provided on the inner sides of the side sealing plate and the top sealing plate respectively; the transverse position of the longitudinal ribs on the inner side of the top sealing plate corresponds to the transverse position of the vertical ribs on the inner side of the rear sealing plate.

[0011] The bottom end of the vertical reinforcement bar is fixedly connected to the reinforcing beam or end plate, and the top end is fixedly connected to the reinforcing beam or longitudinal reinforcement bar.

[0012] The reinforcing beam includes vertical beams, horizontal beams, and longitudinal beams. The vertical beams are installed at the junctions of the front sealing plate, the rear sealing plate, and the side sealing plate. The horizontal beams are installed at the junctions of the front sealing plate and the top sealing plate, and at the junctions of the rear sealing plate and the top and bottom sealing plates. The longitudinal beams are installed at the junctions of the side sealing plate and the top and bottom sealing plates.

[0013] The pressure relief valve is installed on the bottom sealing plate of the outer casing. The bottom sealing plate has a pressure relief port corresponding to the pressure relief valve, and the diameter of the pressure relief port is 120-140mm.

[0014] The pressure relief valve includes a valve seat and a valve plate. The connecting plate at the bottom of the valve seat is hexagonal in shape, and the thickness of the valve plate is 0.15 to 0.35 mm.

[0015] The beneficial effects of this utility model are as follows: This utility model features a reinforced structure with reinforcing beams and ribs in at least three directions (vertical, horizontal, and longitudinal) inside the outer casing, increasing the strength of the casing. Even under conditions of high arcing current, the casing will not deform or crack, resulting in a more robust and reliable structure with higher safety performance. The rear sealing plate of the outer casing is connected to the reinforcing ribs via a snap-fit ​​structure, improving both the strength of the rear sealing plate and the reliability of the connection, further enhancing safety performance. Attached Figure Description

[0016] Figure 1 This is a longitudinal and vertical cross-sectional view of Embodiment 1 of this utility model.

[0017] Figure 2 for Figure 1A sectional view of section AA in the middle.

[0018] Figure 3 for Figure 1 Sectional view of section BB.

[0019] Figure 4 for Figure 1 A sectional view of section CC.

[0020] Figure 5 This is a bottom view of Embodiment 1 of the present utility model.

[0021] Figure 6 This is a schematic diagram of the structure of the sealing plate and one side sealing plate after the removal of the sealing plate in Embodiment 1 of this utility model.

[0022] Figure 7 This is a schematic diagram of the structure of the rear sealing plate in Embodiment 1 of this utility model.

[0023] Figure 8 This is a schematic diagram of the structure of the sealing plate and one side sealing plate after the removal of the sealing plate in Embodiment 2 of this utility model.

[0024] Figure 9 This is a schematic diagram of the structure of the rear sealing plate in Embodiment 2 of this utility model.

[0025] Figure 10 This is a cross-sectional view of the horizontal and vertical sections of Embodiment 2 of this utility model.

[0026] In the picture: 1. Outer casing; 11. Front sealing plate; 12. Side sealing plate; 13. Rear sealing plate; 131. Hook 1; 132. Hook 2; 14. Top sealing plate; 15. Bottom sealing plate; 151. Pressure relief port; 2. Vertical beam; 3. Horizontal beam; 4. Longitudinal beam; 5. Vertical reinforcement; 51. Bracket; 52. Lower flange; 53. Upper flange; 54. Notch; 6. Horizontal reinforcement; 7. Longitudinal reinforcement; 71. Connection part; 8. Longitudinal bar; 9. Pressure relief valve; 91. Valve seat; 92. Valve plate. Detailed Implementation

[0027] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0028] This utility model provides a cabinet structure suitable for electrical cabinets. The cabinet can withstand large arcing currents, has a robust and reliable structure, and high safety performance. The cabinet includes an outer casing 1, a reinforcing structure disposed inside the outer casing 1, and a pressure relief valve 9 disposed at the bottom of the outer casing 1. The arrangement and number of the reinforcing structure inside the outer casing 1 vary depending on the specifications of the cabinet. Example 1

[0029] Reference to an embodiment of the enclosure Figures 1 to 7The outer casing 1 includes a front sealing plate 11, two side sealing plates 12, a rear sealing plate 13, a top sealing plate 14, and a bottom sealing plate 15.

[0030] Vertical beams 2 are provided at the junctions of the front sealing plate 11, the rear sealing plate 13, and the side sealing plate 12. Horizontal beams 3 are provided at the junctions of the front sealing plate 11 and the top sealing plate 14, and at the junctions of the rear sealing plate 13 and the top sealing plate 14 and the bottom sealing plate 15. Longitudinal beams 4 are provided at the junctions of the side sealing plate 12 and the top sealing plate 14 and the bottom sealing plate 15. The front sealing plate 11 has several vertical ribs 5, two in this embodiment; the inner side of the rear sealing plate 13 has several vertical ribs 5 and horizontal ribs 6, two vertical ribs 5 and one horizontal rib 6 in this embodiment; the inner sides of the side sealing plate 12 and the top sealing plate 14 each have several longitudinal ribs 7, two in this embodiment. The vertical ribs 5 on the inner sides of the front sealing plate 11 and the rear sealing plate 13, and the longitudinal ribs 7 on the inner side of the top sealing plate 14 are positioned laterally. The top end of the vertical rib 5 on the inner side of the front sealing plate 11 is fixed to the corresponding longitudinal rib 7, and the bottom end is fixed to the stepped surface of the front sealing plate 11. The top end of the vertical rib 5 on the inner side of the rear sealing plate 13 is fixed to the connecting part 71 extending from the corresponding longitudinal rib 7, and the bottom end is fixedly connected to the lower crossbeam 3 through the outwardly turned-down flange 52. The front and rear vertical ribs 5 corresponding to the lateral positions form a group, and several longitudinal rods 8 are respectively arranged between each group of vertical ribs 5. In this embodiment, two longitudinal rods 8 are arranged vertically and horizontally at intervals in each group, and the longitudinal rods 8 are fixedly connected to the front and rear vertical ribs 5 of each group. The two ends of the transverse ribs 6 on the inner side of the rear sealing plate 13 are respectively fixed to the vertical beams 2 on both sides; the vertical ribs 5 are respectively provided with notches 54 corresponding to the transverse ribs 6, and the transverse ribs 6 pass through the notches 54 of the vertical beams 2. The longitudinal ribs 7 on the inner side of the side sealing plate 12 are fixed to the side sealing plate 12.

[0031] In this embodiment, the vertical beam 2, horizontal beam 3, longitudinal beam 4, vertical rib 5, horizontal rib 6, longitudinal rib 7, and longitudinal rod 8 constitute the internal reinforcement structure of the outer box 1. The reinforcement structure increases the strength of the box, making the box structure more robust and reliable, and improving its safety performance.

[0032] like Figure 3 , Figure 6 , Figure 7 As shown, several horizontal locking rods 51 are provided on the vertical ribs 5 on the inner side of the rear sealing plate 13, facing the rear sealing plate 13. The locking rods 51 are arranged at intervals along the vertical direction. Several hooks 131 are provided on the inner side of the rear sealing plate 13, facing the vertical ribs 5. The hooks 131 are fixed to the rear sealing plate 13 and are engaged with the locking rods 51. The rear sealing plate 13 is fixedly connected to the vertical ribs 5 through the engagement of the hooks 131 and the locking rods 51. This improves the strength of the rear sealing plate 13 and also improves the connection reliability and safety performance.

[0033] like Figures 1 to 5As shown, the pressure relief valve 9 is installed on the bottom sealing plate 15 of the outer casing 1. The bottom sealing plate 15 has a pressure relief port 151 corresponding to the pressure relief valve 9. The diameter of the pressure relief port 151 is 120-140mm, preferably 130mm. The pressure relief valve 9 includes a valve seat 91 and a valve plate 92. The connecting plate at the bottom of the valve seat 91 is hexagonal in shape, which facilitates the connection of the valve seat 91 and improves the reliability of the valve seat 91. The thickness of the valve plate 92 is 0.15-0.35mm, preferably 0.25mm, which is more conducive to the pressure relief of the high pressure inside the casing through the pressure relief port 151. Example 2

[0034] Another embodiment of the enclosure is referenced. Figures 8 to 10 The width of the box in this embodiment is smaller than that in Embodiment 1, therefore the internal reinforcing structure of its outer box 1 is different from that of Embodiment 1.

[0035] The difference between the reinforcing structure of this embodiment and the reinforcing structure of Embodiment 1 is that: a vertical rib 5 and two horizontal ribs 6 are provided on the inner side of the rear sealing plate 13. The vertical rib 5 is located in the middle of the inner side of the rear sealing plate 13. The two horizontal ribs 6 are arranged vertically and horizontally at intervals. The two horizontal ribs 6 pass through the notch 54 opened on the vertical rib 5. The bottom end of the vertical rib 5 is fixedly connected to the lower crossbeam 3 through the outwardly turned lower flange 52, and the top end is fixedly connected to the upper crossbeam 3 through the outwardly turned upper flange 53. No vertical rib 5 is provided on the inner side of the front sealing plate 11, no longitudinal rib 7 is provided on the inner side of the top sealing plate 14, and no longitudinal bar 8 is provided between the front sealing plate 11 and the rear sealing plate 13.

[0036] In this embodiment, the vertical beam 2, horizontal beam 3, longitudinal beam 4, vertical rib 5, horizontal rib 6, and longitudinal rib 7 (located inside the side sealing plate 12) constitute the reinforcing structure inside the outer box 1, ensuring the strength, reliability, and safety performance of the box.

[0037] On the inner side of the rear sealing plate 13, several horizontal locking rods 51 are provided on the vertical ribs 5 facing the rear sealing plate 13, and the locking rods 51 are arranged at intervals along the vertical direction. On the inner side surface of the rear sealing plate 13, several hooks 131 are provided corresponding to the locking rods 51 facing the vertical ribs 5, and hooks 2 132 are provided corresponding to one of the horizontal ribs 6. Hooks 131 and hooks 2 132 are fixed to the rear sealing plate 13. Hooks 131 engage with the locking rods 51, and hooks 2 132 engage with the corresponding horizontal ribs 6. The rear sealing plate 13 is fixedly connected to the vertical ribs 5 and horizontal ribs 6 through the engagement of hooks 131 with the locking rods 51 and hooks 2 132 with the horizontal ribs 6, which improves the strength of the rear sealing plate 13 and also improves the connection reliability and safety performance. In this embodiment, the rear sealing plate 13 is engaged with one horizontal rib 6. In other embodiments, the rear sealing plate 13 can also be engaged with more than one horizontal rib 6 as needed.

[0038] This invention features a reinforced structure inside the outer casing 1, with reinforcing beams (vertical beam 2, horizontal beam 3, and longitudinal beam 4) and reinforcing ribs (vertical rib 5, horizontal rib 6, and longitudinal rib 7) in the vertical, horizontal, and longitudinal directions. This increases the strength of the casing, ensuring that it will not deform or crack even under high arcing current conditions. The casing structure is more robust and reliable, resulting in higher safety performance. The rear sealing plate 13 of the outer casing 1 is connected to the reinforcing ribs via a snap-fit ​​structure, which improves both the strength of the rear sealing plate 13 and the reliability of the connection, further enhancing safety performance.

[0039] The above description is an explanation of the present utility model and not a limitation thereof. The present utility model can be modified in any form without departing from its spirit.

Claims

1. An electrical cabinet box structure, a reinforcing structure is arranged inside an outer box (1), a pressure relief valve (9) is arranged at the bottom of the outer box (1), characterized in that: The reinforcing structure includes reinforcing beams and reinforcing ribs arranged in three directions: vertical, horizontal and longitudinal, inside the outer box (1). The reinforcing beams are arranged at the joint of two adjacent sealing plates of the outer box (1), and the reinforcing ribs are arranged on the inner side of the sealing plates. The rear sealing plate (13) of the outer box (1) is connected to the reinforcing ribs by a snap-fit ​​structure.

2. The electrical cabinet enclosure structure of claim 1, wherein: The inner side of the rear sealing plate (13) is provided with at least one vertical rib (5) and at least one horizontal rib (6). Several horizontal clamps (51) are provided on the vertical rib (5) facing the rear sealing plate (13). Several hooks (131) are provided on the rear sealing plate (13) respectively. The hooks (131) are attached to the clamps (51).

3. The electrical cabinet enclosure structure of claim 2, wherein: The rear sealing plate (13) is provided with a second hook (132) corresponding to the horizontal rib (6), and the second hook (132) is attached to the horizontal rib (6).

4. The electrical cabinet enclosure structure of claim 2, wherein: The vertical reinforcement (5) has a notch (54) corresponding to the horizontal reinforcement (6), and the horizontal reinforcement (6) passes through the notch (54) of the vertical beam (2); the horizontal reinforcement (6) is connected to the reinforcing beam.

5. An electrical cabinet enclosure structure according to claim 1 or 2, characterised in that: The outer box (1) includes a front sealing plate (11). At least one vertical rib (5) is provided on the inner side of the front sealing plate (11). The horizontal positions of the vertical ribs (5) on the inner side of the front sealing plate (11) and the rear sealing plate (13) are corresponding. Several longitudinal bars (8) are provided between the front and rear vertical ribs (5) corresponding to the positions.

6. The electrical cabinet enclosure structure of claim 1, wherein: Several longitudinal ribs (7) are provided on the inner side of the side sealing plate (12) and the top sealing plate (14); the lateral position of the longitudinal ribs (7) on the inner side of the top sealing plate (14) corresponds to the lateral position of the vertical ribs (5) on the inner side of the rear sealing plate (13).

7. The electrical cabinet enclosure structure of claim 5, wherein: The bottom end of the vertical bar (5) is fixedly connected to the reinforcing beam or the end plate, and the top end is fixedly connected to the reinforcing beam or the longitudinal bar (7).

8. The electrical cabinet enclosure structure of claim 1, wherein: The reinforcing beam includes a vertical beam (2), a horizontal beam (3), and a longitudinal beam (4). The vertical beam (2) is located at the junction of the front sealing plate (11), the rear sealing plate (13), and the side sealing plate (12). The horizontal beam (3) is located at the junction of the front sealing plate (11) and the top sealing plate (14), and at the junction of the rear sealing plate (13) and the top sealing plate (14) and the bottom sealing plate (15). The longitudinal beam (4) is located at the junction of the side sealing plate (12) and the top sealing plate (14) and the bottom sealing plate (15).

9. The electrical cabinet enclosure structure of claim 1, wherein: The pressure relief valve (9) is installed on the bottom sealing plate (15) of the outer casing (1). The bottom sealing plate (15) has a pressure relief port (151) corresponding to the pressure relief valve (9). The diameter of the pressure relief port (151) is 120-140mm.

10. The electrical cabinet enclosure structure of claim 1, wherein: The pressure relief valve (9) includes a valve seat (91) and a valve plate (92). The connecting plate at the bottom of the valve seat (91) is hexagonal in shape, and the thickness of the valve plate (92) is 0.15 to 0.35 mm.

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