Ring main unit convenient to expand

Abstract

The invention discloses a ring main unit convenient to expand, which comprises an expanded ring main unit, an upper cabinet body and an expanded bottom cabinet are arranged on the expanded ring main unit, the expanded bottom cabinet is arranged at the bottom of the upper cabinet body, a box door is arranged on the front surface of the upper cabinet body, an electric energy meter and a display are arranged on the box door, and an expanded bottom cabinet mounting groove is formed in the lower half part of the cabinet body of the box door. A lifting driving mechanism is arranged at each corner of the top of the inner side of the extension bottom cabinet mounting groove, a micro motor is arranged in the center of a motor fixing block on the lifting driving mechanism, a rotating shaft of the micro motor is arranged downwards, a threaded rod is arranged below the rotating shaft of the micro motor in a matched mode, and a base is arranged at the bottom of the extension bottom cabinet upper cabinet body in a matched mode; the expansion type ring main unit is simple in structure, the cabinet body can be expanded according to actual needs, meanwhile, space utilization in the cabinet body of the expansion type ring main unit can be expanded according to actual installation requirements, the expansion type ring main unit adopts electric expansion, and the expansion mode is simple and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of ring main unit, and in particular to a ring main unit that is easy to expand. Background Art

[0002] Ring main unit (RMC) is a group of electrical equipment (high voltage switchgear) installed in a metal or non-metallic insulated cabinet or made into an assembled interval ring main unit. Its core part uses load switches and fuses, which have the advantages of simple structure, small size, low price, improved power supply parameters and performance, and power supply safety. It is widely used in distribution stations and box-type substations in urban residential areas, high-rise buildings, large public buildings, factories and enterprises and other load centers.

[0003] Ring network refers to a ring distribution network, that is, the power supply trunk forms a closed ring, the power supply supplies power to this ring trunk, and then distributes power to the outside through high-voltage switches from the trunk. The advantage of this is that each distribution branch can get power from both the left and right trunks. When the left trunk fails, it continues to get power from the right trunk, and when the right trunk fails, it continues to get power from the left trunk. In this way, although the total power supply is single-circuit power supply, each distribution branch gets the benefits similar to dual-circuit power supply, thereby improving the reliability of power supply.

[0004] The so-called "ring main unit" means that each distribution branch is equipped with a switch cabinet (outgoing switch cabinet), and the busbar of this switch cabinet is also part of the ring trunk. In other words, the ring trunk is composed of the busbars of each outgoing cabinet. Each outgoing cabinet is called a "ring main unit". In fact, the meaning of "ring network" cannot be seen from a single ring main unit.

[0005] The rated current of these ring network cabinets is not large, so the high-voltage switch of the ring network cabinet generally does not use a complex circuit breaker but a simple high-voltage load switch with a high-voltage fuse. In other words, the high-voltage switch in the ring network cabinet is generally a load switch. The ring network cabinet uses a load switch to operate the normal current and a fuse to cut off the short-circuit current. The combination of the two replaces the circuit breaker. Of course, this can only be limited to a certain capacity.

[0006] Such switch cabinets can also be used in non-ring network distribution systems. Therefore, with the widespread application of this type of switch cabinet, "ring network cabinet" has jumped out of the scope of ring network distribution and generally refers to high-voltage switch cabinets with load switches as the main switches.

[0007] However, the current ring main units are basically fixed and non-expandable, and a small number of ring main units are expanded by external manual expansion, which is very inconvenient. Therefore, an improved technology is urgently needed to solve this problem in the prior art. Summary of the invention

[0008] The purpose of the present invention is to provide an expandable ring network cabinet 1 with a simple structure, and the cabinet body can be expanded according to actual needs. At the same time, the space utilization inside the expandable ring network cabinet 1 can also be expanded according to actual installation requirements. The expandable ring network cabinet 1 adopts electric expansion, and the expansion method is simple and convenient to solve the problems raised in the above-mentioned background technology.

[0009] To achieve the above object, the present invention provides the following technical solution: an expandable ring main unit, comprising an expandable ring main unit, wherein the expandable ring main unit is provided with an upper cabinet and an expansion bottom cabinet, wherein the expansion bottom cabinet is arranged at the bottom of the upper cabinet;

[0010] The front of the upper cabinet is provided with a cabinet door, on which an electric energy meter and a display are provided, and the lower part of the cabinet of the cabinet door is provided with an extended bottom cabinet installation slot;

[0011] A lifting drive mechanism is provided at each corner of the top of the inner side of the expansion base cabinet installation slot, and a motor fixing block is provided on the lifting drive mechanism. A micro motor is provided at the center of the motor fixing block. The rotating shaft of the micro motor is arranged downward, and a threaded rod is provided below the rotating shaft of the micro motor.

[0012] The extended base cabinet is provided with a cabinet body, the bottom of the cabinet body is provided with a base, the front of the extended base cabinet is provided with a protective door, and the bottom of the extended base cabinet is installed in cooperation with the extended base cabinet.

[0013] Preferably, the side walls on both sides of the upper cabinet are symmetrically provided with C-shaped bracket installation grooves, and the inside of the C-shaped bracket installation groove is matched with an adjustable installation bracket, and the two end brackets of the adjustable installation bracket are arranged inside the C-shaped bracket installation groove;

[0014] The upper half of the back side of the upper cabinet is provided with two wiring slots, and the outside of the wiring slots is provided with a protective cover plate.

[0015] Preferably, a control box is provided on the back side of the box door, the display is cooperatively connected to the control box, an extended base cabinet mounting groove is cooperatively provided inside the lower half of the box door, the extended base cabinet mounting groove is connected to the bottom surface of the box door, and an anti-slip guard is provided at the notch of the extended base cabinet mounting groove below the box door.

[0016] Preferably, both end caps of the adjustable mounting bracket are arranged in a T-shape, and a plurality of mounting fixing holes are arranged at equal intervals in the center of the adjustable mounting bracket.

[0017] Preferably, an insulating sealing strip is provided between the two protective doors on the front of the extended base cabinet, and one side surface of the insulating sealing strip is bonded and fixed to the edge of the door frame of the protective door.

[0018] Preferably, screw movable grooves are provided inside the four corners of the extended base cabinet, and a hexagonal screw sleeve is provided at the top notch of the screw movable groove. The hexagonal screw sleeve is fixedly installed with the screw movable groove in the side wall of the extended base cabinet, and a high-strength threaded groove is provided in the inner center of the hexagonal screw sleeve.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) There are two wiring slots on the upper back of the upper cabinet. The outside of the wiring slots is provided with a protective cover. According to the actual use requirements, one wiring slot or two wiring slots can be used at the same time, and the use can be freely expanded according to the actual situation;

[0021] (2) The ends of the adjustable mounting bracket are provided with T-shaped ends, and a plurality of mounting fixing holes are provided at equal intervals in the center of the adjustable mounting bracket. The two end brackets of the adjustable mounting bracket are arranged inside the C-shaped bracket mounting groove, and the adjustable mounting bracket can be moved and expanded automatically inside the C-shaped bracket mounting groove according to actual needs;

[0022] (3) When the micro motor on the lifting drive mechanism rotates, it drives the threaded rod to rotate. The threaded rod indirectly drives the upper cabinet to move upward, and at the same time, the extended bottom cabinet is pushed out from the inside of the extended bottom cabinet installation slot in the lower half of the upper cabinet, thereby expanding the space of the entire extended ring network cabinet, greatly increasing the overall space size of the extended ring network cabinet. The lifting drive mechanism can automatically expand the space of the extended ring network cabinet, so that the extended ring network cabinet can be freely contracted;

[0023] (4) An insulating sealing strip is provided between the two protective doors on the front of the expansion base cabinet. One side surface of the insulating sealing strip is bonded and fixed to the edge of the door frame of the protective door. The insulating sealing strip can ensure the sealing of the expansion base cabinet when it is closed and prevent external humid objects from entering the expansion base cabinet from the front. The insulating sealing strip also has the function of reducing noise.

[0024] (5) The expandable ring main unit has a simple structure and can be expanded according to actual needs. At the same time, the space inside the expandable ring main unit can also be expanded according to actual installation requirements. The expandable ring main unit adopts electric expansion, and the expansion method is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the extended ring main unit of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the extended ring main unit of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the extended base cabinet of the present invention;

[0028] Figure 4 It is a schematic diagram of the lifting drive mechanism of the present invention;

[0029] Figure 5 This is a schematic diagram of the hexagonal screw casing structure of the present invention;

[0030] Figure 6 This is a cross-sectional view of the upper cabinet of the present invention;

[0031] Figure 7 This is a cross-sectional view of the C-shaped bracket installation groove of the present invention;

[0032] Figure 8 It is a schematic diagram of the back of the expandable ring main unit of the present invention.

[0033] In the figure: 1. Extended ring main unit; 2. Upper cabinet body; 3. Box door; 4. Electric energy meter; 5. Display; 6. Base; 7. Extended bottom cabinet; 8. Hexagonal screw sleeve; 9. Protective door; 10. Micro motor; 11. Threaded rod; 12. Motor fixing block; 13. Lifting drive mechanism; 14. Adjustable mounting bracket; 15. C-type bracket mounting slot; 16. Wiring slot. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-8 The present invention provides a technical solution: an expandable ring main unit, comprising an expandable ring main unit 1, wherein the expandable ring main unit 1 is provided with an upper cabinet 2 and an expansion bottom cabinet 7, wherein the expansion bottom cabinet 7 is arranged at the bottom of the upper cabinet 2;

[0036] C-shaped bracket mounting grooves 15 are symmetrically arranged on the side walls on both sides inside the upper cabinet body 2, and an adjustable mounting bracket 14 is arranged inside the C-shaped bracket mounting groove 15. The end caps of the adjustable mounting bracket 14 are arranged in a T shape, and a plurality of mounting fixing holes are arranged at equal intervals in the center of the adjustable mounting bracket 14. The end brackets of the adjustable mounting bracket 14 are arranged inside the C-shaped bracket mounting groove 15, and the adjustable mounting bracket 14 can be moved and expanded automatically inside the C-shaped bracket mounting groove 15 according to actual needs.

[0037] Two wiring slots 16 are provided on the upper half of the back side of the upper cabinet 2, and a protective cover is provided outside the wiring slots 16. According to actual use requirements, one wiring slot 16 or two wiring slots 16 can be used at the same time, and the use can be freely expanded according to actual conditions.

[0038] A door 3 is provided on the front of the upper cabinet body 2, and an electric energy meter 4 and a display 5 are provided on the door 3. An extended bottom cabinet mounting groove is provided on the lower half of the cabinet body of the door 3, and a control box is provided on the back of the door 3. The display 5 is connected with the control box. An extended bottom cabinet mounting groove is provided inside the lower half of the door 3, and the extended bottom cabinet mounting groove is connected with the bottom surface of the door 3. An anti-slip retaining edge is provided at the notch of the extended bottom cabinet mounting groove below the door 3.

[0039] A lifting drive mechanism 13 is provided at each corner of the top inner side of the extended base cabinet installation groove, and a motor fixing block 12 is provided on the lifting drive mechanism 13. A micro motor 10 is provided at the inner center of the motor fixing block 12, and the rotating shaft of the micro motor 10 is arranged downwardly, and a threaded rod 11 is provided below the rotating shaft of the micro motor 10.

[0040] A cabinet body is provided on the extended base cabinet 7, and a base 6 is provided at the bottom of the cabinet body, and a protective door 9 is provided at the front of the extended base cabinet 7. The bottom of the extended base cabinet 7 is installed in cooperation with the extended base cabinet 7, and an insulating sealing strip is provided between the two protective doors 9 on the front of the extended base cabinet 7. One side surface of the insulating sealing strip is bonded and fixed to the edge of the door frame of the protective door 9. The gap between the two protective doors 9 and the insulating sealing strip can ensure the sealing of the extended base cabinet 7 when it is closed, and prevent external moist objects from entering the interior of the extended base cabinet 7 from the front. The insulating sealing strip also has the effect of noise reduction.

[0041] Screw movable grooves are provided inside the four corners of the extended base cabinet 7, and a hexagonal screw sleeve 8 is provided at the top notch of the screw movable groove. The hexagonal screw sleeve 8 is fixedly installed with the screw movable groove in the side wall of the extended base cabinet 7. A high-strength threaded groove is provided in the center of the inner part of the hexagonal screw sleeve 8. The hexagonal screw sleeve 8 is not only high in strength, but also will not rotate during long-term use.

[0042] When the micro motor 10 on the lifting drive mechanism 13 rotates, it drives the threaded rod 11 to rotate. The threaded rod 11 indirectly drives the upper cabinet body 2 to move upward, and at the same time, the extended bottom cabinet 7 is pushed out from the extended bottom cabinet installation groove in the lower half of the upper cabinet body 2, thereby expanding the space of the entire extended ring network cabinet 1, greatly improving the overall space size of the extended ring network cabinet 1, and the lifting drive mechanism 13 can make the space of the extended ring network cabinet 1 automatically expand, so that the extended ring network cabinet 1 can be freely contracted.

[0043] Expansion process: When the micro motor 10 on the lifting drive mechanism 13 inside the expandable ring network cabinet 1 rotates, it drives the threaded rod 11 to rotate. The threaded rod 11 indirectly drives the upper cabinet body 2 to move upward. At the same time, the extended bottom cabinet 7 is pushed out from the extended bottom cabinet installation slot in the lower half of the upper cabinet body 2. The upper cabinet body 2 moves upward at a constant speed to expand the space of the entire expandable ring network cabinet 1.

[0044] The expandable ring main unit 1 has a simple structure and can be expanded according to actual needs. At the same time, the space utilization inside the expandable ring main unit 1 can also be expanded according to actual installation requirements. The expandable ring main unit 1 adopts electric expansion, and the expansion method is simple and convenient.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An expandable ring main unit, comprising an expandable ring main unit (1), characterized in that: The extended ring main unit (1) is provided with an upper cabinet (2) and an extended bottom cabinet (7), and the extended bottom cabinet (7) is arranged at the bottom of the upper cabinet (2); The front of the upper cabinet (2) is provided with a cabinet door (3), on which an electric energy meter (4) and a display (5) are provided, and the lower part of the cabinet of the cabinet door (3) is provided with an extended bottom cabinet installation slot; A lifting drive mechanism (13) is provided at each corner of the top of the inner side of the expansion base cabinet installation groove, a motor fixing block (12) is provided on the lifting drive mechanism (13), a micro motor (10) is provided at the center of the motor fixing block (12), a rotating shaft of the micro motor (10) is arranged downward, and a threaded rod (11) is provided below the rotating shaft of the micro motor (10); The extended base cabinet (7) is provided with a cabinet body, the bottom of the cabinet body is provided with a base (6), the front of the extended base cabinet (7) is provided with a protective door (9), and the bottom of the extended base cabinet (7) is installed in cooperation with the extended base cabinet (7).

2. The easily expandable ring main unit according to claim 1, characterized in that: The upper cabinet (2) has symmetrically disposed C-shaped bracket installation grooves (15) on both side walls inside, and an adjustable installation bracket (14) is provided inside the C-shaped bracket installation groove (15), and the brackets at both ends of the adjustable installation bracket (14) are arranged inside the C-shaped bracket installation groove (15); The upper half of the back side of the upper cabinet (2) is provided with two wiring slots (16), and the outside of the wiring slots (16) is provided with a protective cover plate.

3. The easily expandable ring main unit according to claim 1, characterized in that: A control box is provided on the back side of the box door (3), and the display (5) is connected to the control box. An extended bottom cabinet installation slot is provided inside the lower half of the box door (3), and the extended bottom cabinet installation slot is connected to the bottom surface of the box door (3). An anti-slip retaining edge is provided at the notch of the extended bottom cabinet installation slot below the box door (3).

4. The easily expandable ring main unit according to claim 1, characterized in that: The ends of the adjustable mounting bracket (14) are arranged in a T-shape, and a plurality of mounting fixing holes are arranged at equal intervals in the center of the adjustable mounting bracket (14).

5. The easily expandable ring main unit according to claim 1, characterized in that: An insulating sealing strip is provided between the two protective doors (9) on the front of the extended base cabinet (7), and one side surface of the insulating sealing strip is bonded and fixed to the edge of the door frame of the protective door (9).

6. The easily expandable ring main unit according to claim 1, characterized in that: The four corners of the extended base cabinet (7) are provided with screw movable grooves, the top notches of the screw movable grooves are provided with hexagonal screw sleeves (8), the hexagonal screw sleeves (8) are fixedly installed with the screw movable grooves in the side walls of the extended base cabinet (7), and the inner center of the hexagonal screw sleeves (8) is provided with a high-strength thread groove.

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