Ring main unit

Abstract

The application relates to the field of electric appliance cabinets, in particular to a ring main unit. A ring main unit comprises a cabinet body and a relay mounting assembly and a terminal mounting assembly arranged in the cabinet body. The cabinet body comprises an inner vertical plate, an inner horizontal plate arranged in the cabinet body and side vertical plates arranged on both sides of the cabinet body. The relay mounting assembly comprises a first support, a second support and a relay mounting plate. The relay mounting plate is connected with the first support / second support through a hinge. A bolt passes through the hinge and the second support, and an outer hexagonal nut is connected with one end of the bolt passing out of the second support. The terminal mounting assembly comprises a terminal support arranged on the inner horizontal plate. The terminal support is used for mounting a terminal, and the highest position of the terminal support is lower than the lowest position of the relay mounting plate. The relay and the terminal are arranged in an upper and lower layering staggered mode in the mounting space, and the terminal and the terminal support do not affect the mounting of the relay.

Description

Technical Field

[0001] This application relates to the field of electrical cabinets, and more particularly to a ring main unit. Background Technology

[0002] As a core component of power distribution networks, the integration and intelligence level of ring main units directly impact power supply reliability and operation and maintenance efficiency. Traditional ring main units typically employ a separate design for primary equipment (such as load switches, instrument transformers, and surge arresters) and secondary equipment (such as control units, communication modules, and protection devices). This means the primary equipment is responsible for power transmission, while the secondary equipment is independently installed in a control box. In contrast, integrated primary and secondary ring main units aim to improve equipment efficiency through hardware integration and software platformization.

[0003] After both primary and secondary equipment are integrated into the ring main unit, the original relay and terminal design space needs to be optimized to accommodate more components and facilitate installation and maintenance due to the increase in internal components. Summary of the Invention

[0004] To accommodate more components and facilitate installation and maintenance, this application provides a ring main unit.

[0005] This application provides a ring main unit, which adopts the following technical solution:

[0006] A ring main unit includes a cabinet and relay mounting components and terminal mounting components disposed within the cabinet.

[0007] The cabinet includes an inner vertical panel and an inner horizontal panel located inside the cabinet, and side vertical panels located on both sides of the cabinet.

[0008] The relay mounting assembly includes a first support member, a second support member, and a relay mounting plate. The relay mounting plate is connected to the first support member / second support member via a hinge. After the bolt passes through the hinge and the second support member, an external hexagonal nut is connected to one end of the bolt that protrudes from the second support member.

[0009] The terminal mounting assembly includes a terminal bracket disposed on an inner horizontal plate, the terminal bracket being used to mount terminals, and the highest position of the terminal bracket being lower than the lowest position of the relay mounting plate.

[0010] By adopting the above technical solution, during installation or disassembly, the relay mounting plate is flipped outward along the rotation direction of the hinge, and then the relay is installed on the mounting plate accordingly. Fasteners are then used to secure the relay to the mounting plate. After resetting the relay mounting plate, the bolts are tightened, and then the terminals are installed on the terminal bracket. The relay and terminals are staggered in the installation space, and the terminals and terminal brackets do not interfere with the installation of the relay.

[0011] Preferably, the second support member includes a first fitting section that fits against the side panel, a first transition section connected to the first fitting section at a 90-degree angle, a second transition section connected to the first transition section at a 90-degree angle, and a second fitting section connected to the second transition section at a 90-degree angle. The second fitting section fits against the inner panel. The first transition section has two horizontal track holes formed near the upper side and near the lower side. The second transition section has a through hole formed at the position of the two track holes on the upper side and the position of the two track holes on the lower side, which are opposite to the first transition section. Bolts pass through the track holes to pass through the second support member.

[0012] By adopting the above technical solution, when installing, repairing or replacing the relay, after loosening the bolts on the hinge used to connect the second support, the relay mounting plate is moved along the track hole toward the first support. This allows the relay mounting plate to flip outwards and open in the direction of hinge rotation. Sufficient space is left between the relay mounting plate and the side plate, so that the relay mounting plate can still be opened to more than 90 degrees after the relay is installed, making it convenient to fasten the fasteners on the back of the relay mounting plate.

[0013] Preferably, a locking auxiliary component is welded and fixed on the side of the first transition section facing the inner vertical plate at the end of each track hole away from the through hole. The locking auxiliary component has an auxiliary hole formed on the side facing the through hole. The auxiliary hole includes two side walls. The distance between the two parallel sides of the external hexagonal nut is equal to or less than the distance between the two side walls of the auxiliary hole, and the outer tangent circle diameter of the external hexagonal nut is greater than the distance between the two side walls of the auxiliary hole.

[0014] By adopting the above technical solution, after installation or replacement, the hinge is reset so that the external hexagonal nut is inserted into the auxiliary hole, and then the position of the hinge is re-locked and fixed on the second support by tightening the bolt head.

[0015] Preferably, the auxiliary hole further includes two bottom walls, and the side walls and bottom walls form a 120-degree angle with each other.

[0016] Preferably, the first support member is a U-shaped plate formed after being bent twice. The side of the first support member facing the inner vertical plate is fixedly connected to the inner vertical plate by fasteners. The side of the first support member facing away from the inner vertical plate has a plurality of first connection holes formed in the vertical direction. The relay mounting plate is provided with a second connection hole at the position opposite to the first connection hole.

[0017] By adopting the above technical solution, the first support member has a certain rigidity and strength, while leaving a distance between the relay mounting plate and the inner vertical plate after the first support member is connected, which serves as a fastener accommodation space and enhances heat dissipation performance.

[0018] Preferably, a nut is welded to the inner side of the first support member at the position opposite to the first connecting hole, and the relay mounting plate is provided with bolts that pass through the second connecting hole and the first connecting hole and connect to the nut.

[0019] Preferably, the relay mounting plate includes a panel body and reinforcing edges extending inward toward the circumference of the panel body.

[0020] By adopting the above technical solution, the strength of the relay mounting plate is enhanced, and deformation of the relay mounting plate after the relay is installed and weighed is avoided.

[0021] Preferably, the terminal mounting assembly includes two rows of terminal brackets disposed on the inner horizontal plate. Each row of terminal brackets is formed by bending a plate. The terminal bracket includes a horizontal section that fits against the inner horizontal plate, a vertical section that extends upward from the horizontal section, an mounting section that extends upward from the vertical section towards the inner vertical plate, and a reinforcing section that slopes downward from the mounting section towards the inner vertical plate.

[0022] By adopting the above technical solution, the installation section structure is strengthened by the reinforcing section, and the inclined installation section reduces the space occupied in the height direction after the terminal is installed.

[0023] Preferably, the mounting section has multiple waist-shaped holes formed in the horizontal direction, and the vertical section has a clearance hole formed in the middle. The leftmost end of the clearance hole is close to the middle of the leftmost waist-shaped hole, and the rightmost end of the clearance hole is close to the middle of the rightmost waist-shaped hole.

[0024] By adopting the above technical solution, the clearance hole allows for horizontal position adjustment of the terminals mounted on the terminal bracket.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] When installing, repairing, or replacing a relay, loosen the bolts on the hinge used to connect the second support member, and then move the relay mounting plate along the track hole toward the first support member. This allows the relay mounting plate to flip outwards in the direction of hinge rotation, leaving sufficient space between the relay mounting plate and the side plate. This allows the relay mounting plate to still open more than 90 degrees after the relay is installed, making it convenient to tighten the fasteners behind the relay mounting plate.

[0027] After installation or replacement, reset the hinge so that the external hex nut is inserted into the auxiliary hole, and then tighten the bolt head to re-lock the hinge onto the second support. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of Embodiment 1;

[0029] Figure 2 This is a structural schematic diagram of the relay mounting assembly and terminal mounting assembly in Embodiment 1;

[0030] Figure 3 yes Figure 2 A schematic diagram showing the location behind the hidden relay mounting plate;

[0031] Figure 4 This is a structural schematic diagram of the second support member in Embodiment 1;

[0032] Figure 5 This is a schematic diagram of the terminal bracket in Embodiment 1;

[0033] Figure 6 This is a structural schematic diagram of Embodiment 2;

[0034] Figure 7 This is a schematic diagram of the relay mounting assembly and terminal mounting assembly in Embodiment 2;

[0035] Figure 8 yes Figure 7 A schematic diagram showing the location behind the hidden relay mounting plate;

[0036] Figure 9 This is a schematic diagram of the terminal bracket structure in Embodiment 2;

[0037] Explanation of reference numerals in the attached drawings: 1. Cabinet; 2. Relay mounting assembly; 3. Terminal mounting assembly; 4. Inner vertical plate; 5. Inner horizontal plate; 6. Side vertical plate; 7. First support member; 8. Second support member; 9. Relay mounting plate; 10. First connecting hole; 11. First mating section; 12. First transition section; 13. Second transition section; 14. Second mating section; 15. Track hole; 16. Through hole; 17. Locking auxiliary member; 18. Auxiliary hole; 19. Panel body; 20. Reinforcing edge; 21. Hinge; 22. Relay mounting hole; 23. Second connecting hole; 24. Terminal bracket; 25. Horizontal section; 26. Vertical section; 27. Mounting section; 28. Reinforcing section; 29. ​​Waist-shaped hole; 30. Clearance hole. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0039] This application discloses a ring main unit. The terms "up", "down", "left" and "right" used in the embodiments are schematic representations of the relative directions of the positional relationship, and are not restrictions on the positional relationship. Example 1

[0040] like Figure 1 As shown, the ring main unit includes a cabinet 1 and a relay mounting assembly 2 and a terminal mounting assembly 3 installed inside the cabinet 1.

[0041] like Figure 1 and Figure 2 As shown, the cabinet 1 includes an inner upright plate 4, an inner horizontal plate 5, and side upright plates 6 located on both sides of the cabinet 1. The relay mounting assembly 2 includes a first support member 7 mounted on the inner upright plate 4 near one of the side upright plates 6, a second support member 8 connecting the other side upright plate 6 and the inner upright plate 4, and a relay mounting plate 9. The first support member 7 is a U-shaped cross-section formed by bending a sheet material twice. The side of the first support member 7 facing the inner upright plate 4 is fixedly connected to the inner upright plate 4 by fasteners. The side of the first support member 7 facing away from the inner upright plate 4 has multiple first connecting holes 10 formed vertically. Nuts are welded to the inner side of the first support member 7 at the positions corresponding to the first connecting holes 10.

[0042] like Figure 3 and Figure 4 As shown, the second support member 8 is a plate with an M-shaped cross-section formed by three bends, where each bend creates a 90-degree angle. The second support member 8 includes a first fitting section 11 that fits into the side panel 6, a first transition section 12 connected to the first fitting section 11 at a 90-degree angle, a second transition section 13 connected to the first transition section 12 at a 90-degree angle, and a second fitting section 14 connected to the second transition section 13 at a 90-degree angle. The second fitting section 14 fits into the inner panel 4. The length of the first transition section 12 is greater than the length of the second transition section 13. The second support member 8 is secured to the first fitting section 11 and the side panel 6, and to the second fitting section 14 and the inner panel 4, using fasteners.

[0043] like Figure 3 and Figure 4 As shown, the first transition section 12 has two horizontally oriented track holes 15 near its upper and lower sides, with a gap between adjacent track holes 15. The second transition section 13 has a through hole 16 near the two track holes 15 on the upper and lower sides of the first transition section 12. On the side of the first transition section 12 facing the inner vertical plate 4, a locking auxiliary component 17 is welded and fixed at the end of each track hole 15 away from the through hole 16. The locking auxiliary component 17 is cylindrical, and an auxiliary hole 18 is formed on the side of the locking auxiliary component 17 facing the through hole 16. The auxiliary hole 18 includes two side walls and two bottom walls, with a 120-degree angle between the side walls and the bottom walls, and between the bottom walls. In this embodiment, the auxiliary hole 18 is on the side of the locking auxiliary component 17 facing the inner vertical plate 4. In other embodiments, the auxiliary hole 18 can also be located on the side of the locking auxiliary component 17 facing the inner vertical plate 4 without breaking the edge.

[0044] like Figure 2 and Figure 3As shown, the relay mounting plate 9 includes a panel body 19 and reinforcing edges 20 extending inwards towards the inner vertical plate 4 around the perimeter of the panel body 19. Hinges 21 are installed on both the upper and lower sides of the reinforcing edges 20 near the second support member 8, and the two hinges 21 are coaxial. A bolt passes through the hinge 21, through the track hole 15, and through the second support member 8. An external hexagonal nut is connected to the end of the bolt that exits the second support member 8. The distance between the two parallel sides of the external hexagonal nut is equal to or less than the distance between the two side walls of the auxiliary hole 18, and the diameter of the circumscribed circle of the external hexagonal nut is greater than the distance between the two side walls of the auxiliary hole 18. A relay mounting hole 22 is formed on the panel body 19, and a second connecting hole 23 is formed on the panel body 19 directly opposite the first connecting hole 10. A bolt passing through the second connecting hole 23 and the first connecting hole 10 and then connected to the nut secures the right end of the panel body 19 to the first support member 7.

[0045] like Figure 2 and Figure 5 As shown, the terminal mounting assembly 3 includes two rows of terminal brackets 24 mounted on the inner horizontal plate 5. Each row of terminal brackets 24 is formed by bending sheet metal. Each terminal bracket 24 includes a horizontal section 25 that fits against the inner horizontal plate 5, a vertical section 26 that extends upward from the horizontal section 25, a mounting section 27 that extends upward towards the inner vertical plate 4 from the vertical section 26, and a reinforcing section 28 that slopes downward towards the inner vertical plate 4 from the mounting section 27. The highest point of the terminal bracket 24 is lower than the lowest point of the relay mounting plate 9. Fasteners pass through the horizontal section 25 to securely connect the terminal bracket 24 and the inner horizontal plate 5. The mounting section 27 has multiple waist-shaped holes 29 formed horizontally, allowing the terminals to be adjusted slightly horizontally along the waist-shaped holes 29. A clearance hole 30 is formed in the middle of the vertical section 26. The leftmost end of the clearance hole 30 is close to the middle of the leftmost waist-shaped hole 29, and the rightmost end of the clearance hole 30 is close to the middle of the rightmost waist-shaped hole 29.

[0046] Specific usage process:

[0047] When installing, repairing, or replacing a relay, unscrew the bolts on the side of the relay mounting plate 9 closest to the first support member 7, and loosen the bolts on the hinge 21 used to connect to the second support member 8. Then, move the relay mounting plate 9 along the track hole 15 toward the first support member 7, so that the relay mounting plate 9 flips outward in the direction of hinge 21 rotation. Sufficient space should remain between the relay mounting plate 9 and the side plate 6, allowing the relay mounting plate 9 to open more than 90 degrees after the relay is installed, facilitating the fastening of the fasteners on the back of the relay mounting plate 9. After installation or replacement, reset the hinge 21 so that the external hexagonal nut engages in the auxiliary hole 18. Then, tighten the bolt heads to re-lock the hinge 21 onto the second support member 8, and finally, secure the relay mounting plate 9 to the first support member 7 with fasteners. Example 2

[0048] like Figure 6 As shown, the ring main unit includes a cabinet 1 and a relay mounting assembly 2 and a terminal mounting assembly 3 installed inside the cabinet 1.

[0049] like Figure 6 and Figure 7 As shown, the cabinet 1 includes an inner upright plate 4, an inner horizontal plate 5, and side upright plates 6 located on both sides of the cabinet 1. The relay mounting assembly 2 includes a first support member 7 mounted on the inner upright plate 4 near one of the side upright plates 6, a second support member 8 connecting the other side upright plate 6 and the inner upright plate 4, and a relay mounting plate 9. The first support member 7 is a U-shaped cross-section formed by bending a sheet material twice. The side of the first support member 7 facing the inner upright plate 4 is fixedly connected to the inner upright plate 4 by fasteners. The side of the first support member 7 facing away from the inner upright plate 4 has multiple first connecting holes 10 formed vertically. Nuts are welded to the inner side of the first support member 7 at the positions corresponding to the first connecting holes 10.

[0050] like Figure 7 and Figure 8 As shown, the second support member 8 is a sheet material with an M-shaped cross-section formed by three bends, where each bend creates a 90-degree angle. The second support member 8 includes a first fitting section 11 that fits into the side panel 6, a first transition section 12 connected to the first fitting section 11 at a 90-degree angle, a second transition section 13 connected to the first transition section 12 at a 90-degree angle, and a second fitting section 14 connected to the second transition section 13 at a 90-degree angle. The second fitting section 14 fits into the inner panel 4. The second support member 8 is secured to the first fitting section 11 and the side panel 6, and to the second fitting section 14 and the inner panel 4, by fasteners.

[0051] like Figure 7 and Figure 8 As shown, the relay mounting plate 9 includes a panel body 19 and reinforcing edges 20 extending inward toward the inner vertical plate 4 around the perimeter of the panel body 19. Hinges 21 are mounted on both the upper and lower sides of the panel body 19 near the second support member 8, and the two hinges 21 are coaxial. The other end of the hinge 21 is connected to the first transition section 12 of the second support member 8 by fasteners, and a through hole 16 is formed on the second transition section 13 of the second support member 8 opposite the hinge 21 mounting position. A relay mounting hole 22 is formed on the panel body 19, and a second connecting hole 23 is formed on the panel body 19 opposite the first connecting hole 10. Bolts passing through the second connecting hole 23 and the first connecting hole 10 are connected with nuts to fix the right end of the panel body 19 to the first support member 7.

[0052] like Figure 7 and Figure 9As shown, the terminal mounting assembly 3 includes two rows of terminal brackets 24 mounted on the inner horizontal plate 5. Each row of terminal brackets 24 is formed by bending sheet metal. Each terminal bracket 24 includes a horizontal section 25 that fits against the inner horizontal plate 5, a vertical section 26 that extends upward from the horizontal section 25, a mounting section 27 that extends upward towards the inner vertical plate 4 from the vertical section 26, and a reinforcing section 28 that slopes downward towards the inner vertical plate 4 from the mounting section 27. The highest point of the terminal bracket 24 is lower than the lowest point of the relay mounting plate 9. Fasteners pass through the horizontal section 25 to securely connect the terminal bracket 24 and the inner horizontal plate 5. The mounting section 27 has multiple oblong holes 29 formed horizontally, allowing the terminals to be adjusted slightly horizontally along the oblong holes 29. A clearance hole 30 is formed in the middle of the vertical section 26. The leftmost end of the clearance hole 30 is close to the middle of the leftmost oblong hole 29, and the rightmost end of the clearance hole 30 is close to the middle of the rightmost oblong hole 29.

[0053] Specific usage process:

[0054] During installation, first unscrew the bolts to allow the relay mounting plate 9 to flip outwards in the direction of hinge 21. Then, install the relay onto the panel body 19, securing it to the mounting plate 9 with fasteners passing through the relay and panel body 19. After resetting the relay mounting plate 9, tighten the bolts, and then install the terminals on the terminal bracket 24.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A ring main unit, comprising a cabinet (1) and a relay mounting assembly (2) and a terminal mounting assembly (3) disposed within the cabinet (1), characterized in that, The cabinet (1) includes an inner vertical panel (4) and an inner horizontal panel (5) located inside the cabinet (1) and side vertical panels (6) located on both sides of the cabinet (1); The relay mounting assembly (2) includes a first support member (7), a second support member (8) and a relay mounting plate (9). The relay mounting plate (9) is connected to the first support member (7) / second support member (8) via a hinge (21). After the bolt passes through the hinge (21) and the second support member (8), an external hexagonal nut is connected to one end of the bolt that passes through the second support member (8). The terminal mounting assembly (3) includes a terminal bracket (24) disposed on the inner horizontal plate (5). The terminal bracket (24) is used to mount terminals, and the highest position of the terminal bracket (24) is lower than the lowest position of the relay mounting plate (9). The second support member (8) includes a first fitting section (11) that fits against the side plate (6), a first transition section (12) that is connected to the first fitting section (11) and forms a 90-degree angle, a second transition section (13) that is connected to the first transition section (12) and forms a 90-degree angle, and a second fitting section (14) that is connected to the second transition section (13) and forms a 90-degree angle. The second fitting section (14) fits against the inner vertical plate (4). The first transition section (12) has two horizontal track holes (15) formed near the upper side and near the lower side. The second transition section (13) has a through hole (16) formed on the side of the first transition section (12) facing the two upper track holes (15) and the two lower track holes (15). The bolt passes through the track hole (15) and through the second support member (8). The first transition section (12) has a locking auxiliary member (17) welded and fixed on the side of each track hole (15) away from the through hole (16) facing the inner plate (4). The locking auxiliary member (17) has an auxiliary hole (18) formed on the side facing the through hole (16). The auxiliary hole (18) includes two side walls. The distance between the two parallel sides of the external hexagonal nut is equal to or less than the distance between the two side walls of the auxiliary hole (18). The diameter of the outer tangent circle of the external hexagonal nut is greater than the distance between the two side walls of the auxiliary hole (18).

2. The ring main unit according to claim 1, characterized in that, The auxiliary hole (18) also includes two bottom walls, and the side walls and the bottom walls are at a 120-degree angle to each other.

3. The ring main unit according to any one of claims 1-2, characterized in that, The first support member (7) is a U-shaped plate formed after being bent twice. The side of the first support member (7) facing the inner vertical plate (4) is fixedly connected to the inner vertical plate (4) by fasteners. The side of the first support member (7) facing away from the inner vertical plate (4) has a plurality of first connection holes (10) formed in the vertical direction. The relay mounting plate (9) has a second connection hole (23) at the position opposite to the first connection hole (10).

4. The ring main unit according to claim 3, characterized in that, A nut is welded to the inner side of the first support member (7) at the position opposite to the first connecting hole (10), and the relay mounting plate (9) is provided with a bolt that passes through the second connecting hole (23) and the first connecting hole (10) and connects to the nut.

5. The ring main unit according to claim 4, characterized in that, The relay mounting plate (9) includes a panel body (19) and a reinforcing edge (20) extending inward toward the inner vertical plate (4) from all sides of the panel body (19).

6. The ring main unit according to claim 5, characterized in that, The terminal mounting assembly (3) includes two rows of terminal brackets (24) disposed on the inner horizontal plate (5). Each row of terminal brackets (24) is formed by bending a plate. The terminal bracket (24) includes a horizontal section (25) that fits against the inner horizontal plate (5), a vertical section (26) that extends upward from the horizontal section (25), an mounting section (27) that extends upward from the vertical section (26) towards the inner vertical plate (4), and a reinforcing section (28) that is connected to the mounting section (27) and tilts downward towards the inner vertical plate (4).

7. The ring main unit according to claim 6, characterized in that, The mounting section (27) has multiple waist-shaped holes (29) formed in the horizontal direction, and the vertical section (26) has a clearance hole (30) formed in the middle. The leftmost end of the clearance hole (30) is close to the middle of the leftmost waist-shaped hole (29), and the rightmost end of the clearance hole (30) is close to the middle of the rightmost waist-shaped hole (29).

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