Inflation insulation ring main unit

Abstract

The utility model discloses an inflatable insulating ring main unit, and relates to the technical field of power distribution cabinets. Comprising a cabinet box, a bearing rail is horizontally fixed to the bottom of the cabinet box, a plurality of bearing frames are installed on the bearing rail in a rolling mode, and each bearing frame is provided with a unit cabinet; the bottoms of the bearing frames are jointly provided with a variable-pitch shaft, the variable-pitch shaft is rotationally connected relative to the cabinet box, the peripheral wall of the variable-pitch shaft is symmetrically provided with a plurality of variable-pitch grooves, the bottom of each bearing frame is rotationally provided with a rolling wheel through a connecting column, and each rolling wheel is arranged in the corresponding variable-pitch groove in a rolling mode. According to the utility model, the top cover which can be lifted up and down is matched with the heat radiation fan to perform heat radiation and cooling treatment on the interior of the cabinet; when a fire occurs in a certain unit cabinet, the variable-pitch shaft is driven by the sleeve which can be locked and unlocked, the distance between the unit cabinets is quickly adjusted, and a certain distance is kept between the unit cabinets, so that the fire of the unit cabinets is prevented from further spreading, and the safety of other electrical equipment is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution cabinets, in particular to a gas-filled insulated ring network cabinet. Background Art

[0002] A gas-insulated ring main unit (RMC) is an electrical device that installs transmission and distribution equipment such as load switches, switchgear, and circuit breakers in a metal cabinet or assembles a bayed ring main unit. Its core uses SF6 gas as the insulating medium, which provides excellent insulation and arc extinguishing capabilities.

[0003] Ring main units (RMUs) are mostly installed outdoors and consist of multiple unit cabinets housed in a single enclosure, providing a degree of dust and water resistance and providing a protective seal. However, RMUs have difficulty dissipating heat naturally, posing a fire risk due to high temperatures. Once a fire occurs, the multiple unit cabinets are rigidly connected and difficult to separate quickly, making the fire easily spread and causing further damage. To address this, we offer a gas-filled insulated RMU. Utility Model Content

[0004] The purpose of the utility model is to provide a gas-filled insulated ring network cabinet.

[0005] The technical problem solved by the present invention is: how to dissipate heat and cool down the cabinet box, and at the same time, when a fire occurs in the unit cabinet, quickly separate multiple unit cabinets so that they maintain a certain distance from each other, thereby solving the problem in the prior art that the unit cabinets cannot be quickly separated, resulting in the spread of fire.

[0006] The utility model can be implemented by the following technical solutions: an insulated ring network cabinet, comprising a cabinet box, a load-bearing track fixedly installed horizontally at the bottom of the cabinet box, a plurality of load-bearing frames rollingly installed on the load-bearing track, and a unit cabinet installed on each load-bearing frame;

[0007] A variable pitch shaft is commonly provided at the bottom of the multiple supporting frames, which is rotatably connected relative to the cabinet box. The outer peripheral wall of the variable pitch shaft is symmetrically provided with multiple variable pitch grooves that gradually open from the center to both ends. A roller is rotatably installed at the bottom of each supporting frame through a connecting column, and each roller is rotatably set in the corresponding variable pitch groove.

[0008] A further technical improvement of the present invention is that a liftable top cover is installed on the top of the cabinet, and a plurality of cooling fans are installed flush with the top of the cabinet to extract the high-temperature air in the cabinet.

[0009] A further technical improvement of the present invention is that extrusion blocks are installed on the four inner side walls of each load-bearing frame through spring floating, and the extrusion blocks are in limiting grooves opened at corresponding positions on the bottom of the unit cabinet.

[0010] A further technical improvement of the present invention is that two bearing wheels are rotatably mounted on a group of relative outer side walls of each bearing frame, and the bearing frame is in rolling cooperation with the bearing track via the bearing wheels.

[0011] A further technical improvement of the present invention is that a sleeve is slidingly provided through one side wall of the cabinet box, a handwheel is fixed to one end of the sleeve located on the outside of the side wall of the cabinet box, and the other end of the sleeve is slidingly engaged with the corresponding end spline of the pitch variable shaft, and the pitch variable shaft can be driven to rotate by turning the handwheel.

[0012] A further technical improvement of the present invention is that a spline is provided on the outer side wall of the sleeve, and when the variable pitch shaft does not need to be driven, the spline cooperates with the spline groove on the side wall of the cabinet to limit the rotational freedom of the handwheel.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The utility model utilizes a top cover that can be raised and lowered in conjunction with a cooling fan to dissipate heat and cool the cabinet. When a fire occurs in a unit cabinet, the spacing between multiple unit cabinets is quickly adjusted by driving the variable pitch shaft through a lockable and unlockable sleeve to keep a certain distance between them, thereby preventing the fire in the unit cabinet from spreading further and protecting the safety of other electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall external structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the unit cabinet structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the connection between the load-bearing rail and the load-bearing frame of the utility model;

[0019] Figure 4 This is a schematic diagram of the connection between the variable pitch shaft and the roller of the utility model;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the variable pitch shaft of the present utility model;

[0021] Figure 6 This is a schematic diagram of the connection structure of the inner and outer side walls of the load-bearing frame of the present invention;

[0022] Figure 7 This is a schematic diagram of the connection state of the extrusion block and the compression spring of the utility model;

[0023] Figure 8 This is a schematic diagram of the connection between the handwheel, sleeve and pitch-changing shaft of the utility model.

[0024] In the figure: 1. Cabinet box; 2. Unit cabinet; 3. Top cover; 4. Cooling fan; 5. Load-bearing rail; 6. Load-bearing frame; 7. Pitch-changing shaft; 8. Roller; 9. Connecting column; 10. Load-bearing wheel; 11. Extrusion block; 12. Compression spring; 13. Handwheel; 14. Sleeve; 201. Limiting slot; 701. Pitch-changing slot. DETAILED DESCRIPTION

[0025] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0026] See also Figure 1-8 As shown, an insulated ring main unit (RMU) comprises a cabinet box 1, in which a plurality of unit cabinets 2 are placed. A top cover 3 with a trapezoidal cross section is provided on the top of the cabinet box 1. The four corners of the bottom of the top cover 3 are fixed to the movable ends of electric push rods provided at the four corners of the cabinet box 1, so that the top cover 3 can be raised and lowered relative to the cabinet box 1.

[0027] A plurality of cooling fans 4 are fixedly installed flush with the top of the cabinet 1. When there is no rain and the temperature inside the cabinet 1 is high, the top cover 3 is raised. After the top cover 3 is raised, the cooling fans 4 are started. The cooling fans 4 draw out the hot air inside the cabinet 1, thereby forming a cooling airflow to cool down and dissipate heat inside the cabinet 1.

[0028] The bottom of the cabinet box 1 is fixedly installed with a load-bearing track 5, and a number of load-bearing frames 6 are rolled and installed on the load-bearing track 5. The number of load-bearing frames 6 is consistent with the number of unit cabinets 2. The unit cabinets 2 are placed on top of the load-bearing frames 6;

[0029] Specifically, the four inner side walls of each supporting frame 6 are all floatingly mounted with an extrusion block 11, each inner side wall is provided with a mounting groove, the extrusion block 11 is slidably arranged in the mounting groove, and two compression springs 12 are symmetrically provided between the extrusion block 11 and the mounting groove, and the two ends of each compression spring 12 are respectively fixedly connected to the extrusion block 11 and the mounting groove, and a limiting groove 201 is provided at a corresponding position on the outer side wall of the bottom of the unit cabinet 2, and each limiting groove 201 cooperates with the extrusion block 11 to position the unit cabinet 2;

[0030] A wheel set is installed on each side of the supporting frame 6. Each wheel set includes two supporting wheels 10 rotatably connected to the outer side wall of the supporting frame 6. Thus, the supporting frame 6 rolls with the supporting track 5 through the two wheel sets.

[0031] Furthermore, a variable pitch shaft 7 is provided on the symmetrical plane in the middle of the bearing rail 5 and below the multiple bearing frames 6. Both ends of the variable pitch shaft 7 rotate relative to the cabinet box 1 through bearing supports. A plurality of variable pitch grooves 701 gradually opening from the center to both ends are symmetrically opened on the outer peripheral wall of the variable pitch shaft 7. The number of the variable pitch grooves 701 is the same as the number of the bearing frames 6.

[0032] The bottom of each supporting frame 6 is fixedly connected to a connecting column 9, and the bottom of the connecting column 9 is rotatably mounted with a roller 8, which is rolled in the corresponding pitch-changing slot 701;

[0033] More importantly, a sleeve 14 is slidably installed through one side wall of the cabinet box 1, and a handwheel 13 is fixed to one end of the sleeve 14 on the outer side of the side wall of the cabinet box 1. A spline hole is provided at the end of the sleeve 14 away from the handwheel 13, and one end of the pitch variable shaft 7 slides in cooperation with the spline hole; the outer wall of the sleeve 14 is provided with a spline and is aligned with the spline groove on the side wall of the cabinet box 1, and a stop ring is provided at the end of the sleeve 14 away from the handwheel 13 to prevent the sleeve 14 from falling out.

[0034] Working principle:

[0035] When heat dissipation is required, the electric push rod lifts the top cover 3, and the cooling fan 4 is started at the same time to perform heat dissipation operation in the cabinet box 1; when a fire occurs in a unit cabinet 2, the handwheel 13 is pushed toward the side wall of the cabinet box 1, so that the spline on the outside of the sleeve 14 is disengaged from the spline groove. At this time, the handwheel 13 can rotate freely, driving the pitch shaft 7 to rotate, and with the cooperation of the pitch groove 701 and the roller 8, the supporting frames 6 are driven away from each other, thereby forming a safe distance between the unit cabinet 2 where the fire occurs and other unit cabinets 2, thereby avoiding further expansion of the fire and providing certain protection for other electrical equipment.

[0036] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A gas-filled insulated ring main unit, characterized in that: It comprises a cabinet box (1), wherein a load-bearing track (5) is fixedly installed horizontally at the bottom of the cabinet box (1), a plurality of load-bearing frames (6) are rollably installed on the load-bearing track (5), and a unit cabinet (2) is installed on each load-bearing frame (6); A variable pitch shaft (7) is commonly provided at the bottom of the plurality of supporting frames (6), the variable pitch shaft (7) being rotatably connected relative to the cabinet box (1), a plurality of variable pitch grooves (701) gradually opening from the center to both ends being symmetrically provided on the outer peripheral wall of the variable pitch shaft (7), a roller (8) being rotatably mounted on the bottom of each supporting frame (6) via a connecting column (9), and each roller (8) being rotatably arranged in a corresponding variable pitch groove (701).

2. The gas-insulated ring main unit according to claim 1, characterized in that: A liftable top cover (3) is installed on the top of the cabinet (1), and a plurality of cooling fans (4) are installed flush with the top of the cabinet (1) to extract the high-temperature air in the cabinet (1).

3. The gas-insulated ring main unit according to claim 1, characterized in that: An extrusion block (11) is installed on the four inner side walls of each of the supporting frames (6) in a floating manner via a spring, and the extrusion block (11) is located in a limiting groove (201) provided at a corresponding position on the bottom of the unit cabinet (2).

4. The gas-filled insulated ring main unit according to claim 1, characterized in that: A group of relative outer side walls of each of the supporting frames (6) are respectively rotatably mounted with two supporting wheels (10), and the supporting frame (6) is in rolling cooperation with the supporting track (5) via the supporting wheels (10).

5. The gas-insulated ring main unit according to claim 1, characterized in that: A sleeve (14) is slidably provided through one side wall of the cabinet box (1); a hand wheel (13) is fixed to one end of the sleeve (14) located outside the side wall of the cabinet box (1); the other end of the sleeve (14) is slidably engaged with a corresponding end spline of the pitch-variable shaft (7); and the pitch-variable shaft (7) can be driven to rotate by turning the hand wheel (13).

6. The gas-insulated ring main unit according to claim 5, characterized in that: The outer wall of the sleeve (14) is provided with a spline. When the variable pitch shaft (7) does not need to be driven, the spline cooperates with the spline groove on the side wall of the cabinet (1) to limit the rotational freedom of the hand wheel (13).

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