Cable compartment structure of switch cabinet

Abstract

The utility model discloses a cable cabinet body structure of switch cabinet, including side plate, bottom plate, closing plate and cabinet door, side plate, closing plate and cabinet door adopt the interlayer structure including outer plate, inner plate and clamping plate, and the clamping plate is clamped between the outer plate and the inner plate, and the clamping plate is the insulating plate, the cabinet door is connected with the side plate, and the labyrinth seal structure is arranged between the cabinet door and the side plate, the utility model discloses the side plate, closing plate and cabinet door adopt the interlayer structure, not only increased the strength of closing plate, make closing plate more solid reliable, and the outer plate and the inner plate can provide protection for the insulating plate of interlayer, avoid burning to insulating plate, and the safety performance is higher.

Description

Technical Field

[0001] This utility model belongs to the field of high voltage electrical equipment manufacturing technology, specifically relating to an electrical cabinet structure for medium voltage power distribution systems, and particularly a cable cabinet structure 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 cable cabinet is prone to permanent deformation under the enormous pressure generated by the arc, affecting the continued use of the equipment; second, the cabinet weld 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 the aforementioned switchgear cable cabinets, which are not robust and reliable enough and have insufficient safety, the applicant provides a switchgear cable cabinet structure with a reasonable structure that is more robust, reliable, and has higher safety performance.

[0005] The technical solution adopted in this utility model is as follows: A cable cabinet structure for a switchgear includes a side panel, a bottom panel, a sealing panel, and a cabinet door; the side panel, sealing panel, and cabinet door adopt a sandwich structure including an outer panel, an inner panel, and a clamping plate, with the clamping plate sandwiched between the outer panel and the inner panel, and the clamping plate being an insulating board; the cabinet door is connected to the side panel, and a labyrinth-type sealing structure is provided between the cabinet door and the side panel.

[0006] As a further improvement to the above technical solution: A connecting plate is provided on the inner side of the cabinet door panel corresponding to the side panel. The side panel has a folded edge, and the connecting plate is connected to the folded edge of the side panel.

[0007] The door panel and the outer side of the connecting plate are provided with folded edges. The folded edges of the door panel, the connecting plate, and the side panel are interwoven to form a labyrinth-like sealing structure.

[0008] The cabinet door panel has folded edges corresponding to the bottom panel and the sealing panel. Folded edges are also provided on the bottom panel and the sealing panel. The folded edges of the door panel, the bottom panel, and the sealing panel intersect to form a labyrinthine sealing structure.

[0009] The side panels include a left side panel and a right side panel, and the sealing panels include a rear sealing panel and a top sealing panel. The left side panel, right side panel, rear sealing panel, and top sealing panel are all sandwich structures.

[0010] The outer and inner panels of the left and right sides have folded edges facing the cabinet door, and there are also clamps between the folded edges of the outer and inner panels; the folded edges of the outer and inner panels extend vertically to form square support columns.

[0011] The outer and inner panels of the top sealing plate facing the cabinet door are respectively provided with folded edges, and a clamp is also provided between the folded edges of the outer and inner panels.

[0012] The bottom plate has a folded edge at the end facing the cabinet door, and an insulating inner bottom plate is installed on the inside of the folded edge.

[0013] The cable cabinet is equipped with a partition plate, which divides the inside of the cable cabinet into a cable compartment and a pressure relief compartment; a first pressure relief port is opened on the bottom plate corresponding to the pressure relief compartment, and a first pressure relief plate is installed on the top of the first pressure relief port; a second pressure relief port is opened on the partition plate, and a second pressure relief plate is installed on the top of the second pressure relief port.

[0014] The left side panel has a three-layer structure in the cable compartment area and a two-layer structure in the pressure relief compartment area; the right side panel has a three-layer structure in both the cable compartment area and the pressure relief compartment area.

[0015] The beneficial effects of this utility model are as follows: The side panels, sealing panels, and cabinet doors of this utility model adopt a sandwich structure, which not only increases the strength of the sealing panel, making it more robust and reliable, but also provides protection for the insulating board in the sandwich structure by the outer and inner panels, preventing the arc from burning the insulating board, thus improving safety performance.

[0016] The cabinet door of this utility model is connected to the side panel through a built-in connecting plate. On the one hand, this allows the folded edge of the door panel to fit more tightly with the folded edge of the side panel, preventing the arc from overflowing from the gap between the door panel and the side panel, thus improving safety performance. On the other hand, a cavity is formed between the folded edge of the door panel and the connecting plate, and the folded edges of the side panel, the connecting plate, and the folded edges of the door panel intersect with each other, thus forming a labyrinth-like sealing structure between the cable compartment and the external environment. This labyrinth-like sealing structure seals the arc, further preventing the arc from overflowing and improving safety performance. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the present invention.

[0018] Figure 2 for Figure 1 A sectional view of section AA in the middle.

[0019] Figure 3 This is a 3D view of the cabinet door.

[0020] Figure 4 for Figure 1 Enlarged view of point B in the middle.

[0021] Figure 5 for Figure 1 Enlarged view of point C in the middle.

[0022] Figure 6 for Figure 2 Enlarged view of point D in the middle.

[0023] Figure 7 for Figure 2 Enlarged view of point E in the middle.

[0024] Figure 8 for Figure 2 Enlarged view of point F in the middle.

[0025] Figure 9 for Figure 2 A magnified view of point G in the middle.

[0026] In the picture: 100. Cable cabinet; 101. Cable compartment; 102. Pressure relief chamber; 200. Air box; 300. Mechanism compartment; 1. Left side panel; 11. Left outer panel; 111. Left outer front fold; 112. Left outer back fold; 12. Left inner panel one; 121. Left inner front fold; 13. Left clamping panel one; 14. Left clamping panel two; 15. Left inner panel two; 2. Right side panel; 21. Right outer panel; 211. Right outer front fold; 212. Right outer back fold; 22. Right inner panel one; 221. Right inner front fold; 23. Right clamping panel one; 24. Right clamping panel two; 25. Right inner panel two; 251. Right inner back fold; 26. Right clamping panel three; 3. Rear sealing panel; 31. Rear outer panel; 311. Rear outer left fold; 312. Rear outer right fold; 32. Rear inner panel; 321. Rear inner left fold; 322. Rear inner right fold; 33. Rear clamping panel; 4. Base plate; 41. Cable inlet; 42. First pressure relief port; 43. Front folded edge; 44. Inner base plate; 5. Top sealing plate; 51. Top outer plate; 511. Top outer front folded edge; 52. Top inner plate; 521. Top inner front folded edge; 53. Top clamping plate one; 54. Top clamping plate two; 6. Cabinet door; 61. Door panel; 611. Outer door panel; 6111. Outer left folded edge; 6112. Outer right folded edge; 6113. Outer bottom folded edge; 6114. Outer top folded edge; 612. Inner door panel; 6121. Inner left folded edge; 6122. Inner right folded edge; 6123. Inner bottom folded edge; 6124. Inner top folded edge; 613. Door clamping plate one; 614. Door clamping plate two; 615. Door clamping plate three; 62. Connecting plate; 63. Cavity; 7. Middle partition; 71. Second pressure relief port; 8. First pressure relief plate; 9. Second pressure relief plate. Detailed Implementation

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

[0028] like Figure 1 , Figure 2 As shown, this utility model provides a cable cabinet structure suitable for switchgear. The cable cabinet 100 can withstand large arcing currents, has a robust and reliable structure, and high safety performance. The cable cabinet 100 is located below the gas box 200 and the mechanism chamber 300.

[0029] The cable cabinet 100 includes a left side panel 1, a right side panel 2, a rear sealing panel 3, a bottom panel 4, a top sealing panel 5, and a cabinet door 6, which covers the front of the cable cabinet 100. The cable cabinet 100 is stepped, with a higher front and a lower rear. The air box 200 is located above the lower part of the cable cabinet 100, and the mechanism chamber 300 is located above the higher part of the cable cabinet 100. The top sealing panel 5 covers the upper part of the cable cabinet 100, between the left side panel 1 and the right side panel 2. Inside the cable cabinet 100, in the middle, parallel to the rear sealing panel 3 and the cabinet door 6, there is a partition 7. The partition 7 divides the interior of the cable cabinet 100 into a cable chamber 101 and a pressure relief chamber 102. The rear of the cable chamber 101 and the pressure relief chamber 102 are located below the air box 200. On the base plate 4, an inlet 41 is provided in the cable chamber 101, and a first pressure relief port 42 is provided in the pressure relief chamber 102. A first pressure relief plate 8 is provided on the first pressure relief port 42. On the partition plate 7, a second pressure relief port 71 is provided in the pressure relief chamber 102, and a second pressure relief plate 9 is provided on the second pressure relief port 71.

[0030] The left side panel 1, right side panel 2, rear sealing panel 3, top sealing panel 5, and cabinet door 6 of cable cabinet 100 all adopt a sandwich structure including an outer panel, an inner panel, and a clamping plate. The clamping plate sandwiched between the outer panel and the inner panel is made of an insulating board, which is an epoxy board. The sandwich structure of the side panels, sealing panels, and cabinet door 6 of cable cabinet 100 not only increases the strength of the sealing panel, making it more robust and reliable, but also provides protection for the insulating board in the sandwich structure between the outer and inner panels, preventing arcing from burning the insulating board, thus improving safety performance.

[0031] like Figure 2 , Figure 6 , Figure 8 As shown, the left side plate 1 has a three-layer structure in the cable chamber 101 area, consisting of a left outer plate 11, a left clamping plate 13, and a left inner plate 12; and a two-layer structure in the pressure relief chamber 102 area, consisting of a left outer plate 11 and a left inner plate 15. The left inner plate 15 is made of insulating epoxy board. Figure 6 As shown, the front end of the left outer panel 11 is bent to form an L-shaped left outer front fold 111, and the front end of the left inner panel 12 is bent to form an L-shaped left inner front fold 121. A left clamping plate 14 is provided on the longitudinal part of the left outer front fold 111 facing the left inner front fold 121. The left outer front fold 111 and the left inner front fold 121 extend vertically and form a square support column at the left front end, which is supported between the bottom plate 4 and the top sealing plate 5, improving the support strength and making the cabinet of the cable cabinet 100 more robust and reliable. Figure 8 As shown, the rear end of the left outer plate 11 is bent to form a left outer rear fold 112. The left outer rear fold 112 extends in the vertical direction and is tightly fixed to the inner side of the rear sealing plate 3.

[0032] like Figure 2 , Figure 7 , Figure 9 As shown, the right side plate 2 adopts a stacked three-layer structure in both the cable compartment 101 area and the pressure relief chamber 102 area. In the cable compartment 101 area, it is set as a stack of right outer plate 21, right clamping plate 1 23, and right inner plate 1 22; in the pressure relief chamber 102 area, it is set as a stack of right outer plate 21, right clamping plate 3 26, and right inner plate 2 25. Figure 7 As shown, the front end of the right outer plate 21 is bent to form an L-shaped right outer front fold 211, and the front end of the right inner plate 22 is bent to form an L-shaped right inner front fold 221. A right clamping plate 24 is provided on the longitudinal side of the right outer front fold 211 facing the right inner front fold 221. The right outer front fold 211 and the right inner front fold 221 extend vertically and form a square support column at the right front end, which is supported between the bottom plate 4 and the top sealing plate 5. Figure 9As shown, a right outer rear hem 212 is formed by bending the rear end of the right outer panel 21, and an I-shaped right inner rear hem 251 is formed by bending the rear end of the second right inner panel 25. The right outer rear hem 212 and the right inner rear hem 251 extend in the vertical direction, and the right outer rear hem 212 is tightly fixed to the inner side surface of the rear sealing plate 3.

[0033] As Figure 2 , Figure 8 , Figure 9 As shown, the rear sealing plate 3 is provided with a three-layer structure of a rear outer plate 31, a rear clamping plate 33, and a rear inner plate 32 stacked. A rear outer left hem 311 is formed by bending the left end of the rear outer plate 31, and a rear outer right hem 312 is formed by bending the right end of the rear outer plate 31. A rear inner left hem 321 is formed by bending the left end of the rear inner plate 32, and a rear inner right hem 322 is formed by bending the right end of the rear inner plate 32. The rear outer left hem 311, the rear outer right hem 312, the rear inner left hem 321, and the rear inner right hem 322 extend in the vertical direction respectively. The rear outer plate 31 and the rear inner plate 32 are also bent to form hems at the bottom end and the top end respectively, and the hems extend in the left-right direction.

[0034] As Figure 1 , Figure 5 As shown, a bottom front hem 43 of an L shape is formed by bending the front end of the bottom plate 也, and a bottom inner plate 44 is arranged inside the vertical part of the bottom front hem 43. The bottom inner plate 44 is made of an insulating epoxy board.

[0035] As Figure 1 , Figure 4 As shown, the top sealing plate 5 is provided with a three-layer structure of a top outer plate 51, a first top clamping plate 53, and a top inner plate 52 stacked. An L-shaped top outer front hem 511 is formed by bending the front end of the top outer plate 51, and an L-shaped top inner front hem 521 is formed by bending the front end of the top inner plate 52. The top outer front hem 511 and the top inner front hem 521 extend in the left-right direction, and a second top clamping plate 54 is clamped between the top outer front hem 511 and the top inner front hem 521.

[0036] As Figure 3 As shown, the cabinet door 6 includes a door panel 61 and L-shaped connecting plates 62 vertically and fixedly connected to the left and right sides of the inner side surface of the door panel 61. A clamping cavity 63 is formed between the connecting plates 62 and the hems on the left and right sides of the door panel 61. As Figure 6 , Figure 7As shown, the left and right connecting plates 62 are respectively fixed to the horizontal portion of the left outer front folded edge 111 of the left side plate 1 and the horizontal portion of the right outer front folded edge 211 of the right side plate 2 by fasteners. The cabinet door 6 is connected to the side plate through the built-in connecting plate 62: on the one hand, it can make the folded edge of the door plate 61 fit more tightly with the folded edge of the side plate, preventing the arc from overflowing from the gap between the door plate 61 and the side plate, thus improving safety performance; on the other hand, a cavity 63 is formed between the folded edge of the door plate 61 and the connecting plate 62, and the folded edges of the side plate, the connecting plate 62, and the folded edges of the door plate 61 intersect with each other, thus forming a labyrinth-like sealing structure between the cable chamber 101 and the external environment, which seals the arc through the labyrinth-like sealing structure, further preventing the arc from overflowing and improving safety performance. Figures 4 to 7 As shown, door panel 61 adopts a three-layer structure consisting of an outer door panel 611, a door clamping panel 613, and an inner door panel 612. Figure 6 As shown, the left end of the outer door panel 611 is bent to form an outer left fold edge 6111 on the outside of the left connecting plate 62, and the left end of the inner door panel 612 is bent to form an inner left fold edge 6121 on the outside of the left connecting plate 62. A door clamping plate 614 is sandwiched between the outer left fold edge 6111 and the inner left fold edge 6121. Figure 7 As shown, the right end of the outer door panel 611 is bent to the outside of the right-side connecting plate 62 to form an outer right folded edge 6112, and the right end of the inner door panel 612 is bent to the outside of the right-side connecting plate 62 to form an inner right folded edge 6122. A door clamping plate 615 is sandwiched between the outer right folded edge 6112 and the inner right folded edge 6122. Figure 4 , Figure 5 As shown, the bottom of the outer door panel 611 is bent to form an outer bottom fold 6113, and the top is bent to form an outer top fold 6114; the bottom of the inner door panel 612 is bent to form an inner bottom fold 6123, and the top is bent to form an inner top fold 6124. The folds of the side panels, bottom panel 4, and top sealing panel 5 are arranged in an alternating pattern with the corresponding folds of the door panel 61, forming a labyrinthine sealing structure, which prevents the overflow of the arc and improves safety performance.

[0037] 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. A cable cabinet structure for a switchgear, comprising a side plate, a bottom plate (4), a sealing plate, and a cabinet door (6); characterized in that: The side panel, sealing panel and cabinet door (6) adopt a sandwich structure including outer panel, inner panel and clamping plate. The clamping plate is sandwiched between the outer panel and the inner panel and is an insulating plate. The cabinet door (6) is connected to the side panel and a labyrinth sealing structure is provided between the cabinet door (6) and the side panel.

2. The cable cabinet structure of the switchgear according to claim 1, characterized in that: A connecting plate (62) is provided on the inner side of the door panel (61) of the cabinet door (6) corresponding to the side panel. A folded edge is provided on the side panel, and the connecting plate (62) is connected to the folded edge of the side panel.

3. The cable cabinet structure of the switchgear according to claim 2, characterized in that: A folded edge is provided on the door panel (61) and on the outside of the connecting plate (62). The folded edges of the door panel (61), the connecting plate (62), and the side panel are interwoven to form a labyrinth-like sealing structure.

4. The cable cabinet structure of the switchgear according to claim 1, characterized in that: The door panel (61) of the cabinet door (6) has folded edges on the corresponding edges of the bottom plate (4) and the sealing plate. Folded edges are provided on the bottom plate (4) and the sealing plate respectively. The folded edges of the door panel (61), the bottom plate (4), and the sealing plate intersect to form a labyrinth-like sealing structure.

5. The cable cabinet structure of the switchgear according to claim 1, characterized in that: The side panel includes a left side panel (1) and a right side panel (2), and the sealing panel includes a rear sealing panel (3) and a top sealing panel (5). The left side panel (1), right side panel (2), rear sealing panel (3), and top sealing panel (5) are all sandwich structures.

6. The cable cabinet structure of the switchgear according to claim 5, characterized in that: The outer and inner panels of the left side panel (1) and the right side panel (2) are respectively provided with folded edges at the end facing the cabinet door (6), and a clamp is also provided between the folded edges of the outer and inner panels; the folded edges of the outer and inner panels extend vertically to form square support columns.

7. The cable cabinet structure of the switchgear according to claim 5, characterized in that: The top sealing plate (5) has folded edges on the outer and inner ends facing the cabinet door (6), and a clamp is also provided between the folded edges of the outer and inner plates.

8. The cable cabinet structure of the switchgear according to claim 1, characterized in that: The bottom plate (4) has a folded edge at the end facing the cabinet door (6), and an insulating inner bottom plate (44) is provided on the inside of the folded edge.

9. The cable cabinet structure of the switchgear according to claim 1, characterized in that: The cable cabinet (100) is equipped with a partition (7) to divide the interior of the cable cabinet (100) into a cable compartment (101) and a pressure relief compartment (102); a first pressure relief port (42) is provided on the bottom plate (4) corresponding to the pressure relief compartment (102), and a first pressure relief plate (8) is provided on the first pressure relief port (42); a second pressure relief port (71) is provided on the partition (7), and a second pressure relief plate (9) is provided on the second pressure relief port (71).

10. The cable cabinet structure of the switchgear according to claim 5 or 9, characterized in that: The left side plate (1) is configured as a stacked three-layer structure in the cable chamber (101) area and as a stacked two-layer structure in the pressure relief chamber (102) area; the right side plate (2) adopts a stacked three-layer structure in both the cable chamber (101) area and the pressure relief chamber (102) area.

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