Normal pressure air insulation ring network cabinet

Abstract

This utility model relates to the field of ring main unit technology and discloses an atmospheric pressure air-insulated ring main unit, including a cabinet. Square openings are provided on both sides of the cabinet. A square frame is fixedly connected to each of the two square openings. An electric fan for blowing air into the cabinet is fixedly connected to each square frame. Top and bottom notches are provided on the upper and lower sides of each square frame, respectively. Limiting strips are fixedly connected to the inner walls of both sides of the square frame. A drying box is slidably connected between multiple limiting strips. Limestone is placed inside the drying box. A top plate is slidably connected to the bottom notch. A U-shaped plate is fixedly connected to the bottom outer wall of the square frame, below the bottom notch. This utility model, through the top notch and rotating locking block, allows for easy removal of the drying box. Furthermore, a spring at the bottom lifts the drying box during removal, further facilitating the removal and replacement of the drying box by the operator.

Description

Technical Field

[0001] This utility model relates to the field of ring main unit technology, and more specifically to an atmospheric pressure air-insulated ring main unit. Background Technology

[0002] Ring main units are core equipment in medium-voltage power distribution networks, used to distribute, control, and protect electrical energy. They must meet the core requirements of high reliability, compactness, and ease of maintenance to ensure continuous operation of the power grid. Atmospheric air insulation technology uses dry air at atmospheric pressure as the insulation medium, completely avoiding the use of SF6. It uses solid insulation materials to wrap the conductor and locally strengthens the insulation.

[0003] A search revealed Chinese patent CN216251916U, which discloses an environmentally friendly air-drying insulated ring main unit. This device uses an exhaust fan to draw air from the top of the cabinet into a drying pipe for drying, and then draws it back to the bottom of the cabinet, achieving air circulation and drying inside the cabinet. This not only provides good drying effect, but also avoids occupying too much internal space because the drying components are located outside the cabinet, thus meeting the miniaturization requirements of the ring main unit. However, the drying pipe is located between the return pipe and the exhaust fan, and both the top and bottom parts are fixed. When disassembling it, it is necessary to remove the components on both sides together, which is a large workload and time-consuming, thus reducing the efficiency of replacing the drying pipe. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an atmospheric pressure air-insulated ring main unit to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: a normal pressure air-insulated ring main unit, including a cabinet body, square openings on both sides of the cabinet body, square frames fixedly connected to each of the two square openings, electric fans for blowing air into the cabinet body fixedly connected to each of the square frames, top and bottom notches respectively opened on the upper and lower sides of the square frames, limit strips fixedly connected to the inner walls of both sides of the square frames, a drying box slidably connected between multiple limit strips, limestone contained in the drying box, a top plate slidably connected to the bottom notch, a U-shaped plate fixedly connected to the bottom outer wall of the square frame below the bottom notch, multiple springs fixedly connected between the bottom inner wall of the U-shaped plate and the top plate, and two sets of exhaust ports on both sides of the cabinet body, each set containing multiple exhaust ports.

[0006] As a further embodiment of this utility model, the inner walls of both sides of the cabinet and around the two sets of exhaust ports are fixedly connected with limiting slides, and a baffle is slidably connected inside one of the limiting slides on the same side.

[0007] As a further embodiment of this utility model, the baffle is provided with a clearance opening, and L-shaped hanging plates that cooperate with the clearance opening are fixedly connected to the inner walls of both sides of the cabinet and located between the two limiting slides.

[0008] As a further embodiment of this utility model, the top outer wall of the frame and both sides of the top notch are rotatably connected to rotating blocks for use with the drying box, and the rotating blocks are semi-circular.

[0009] As a further embodiment of this utility model, the outer walls on both sides of the cabinet and on multiple exhaust ports are provided with downwardly inclined waterproof covers.

[0010] As a further embodiment of this utility model, the top notch and the bottom notch are positioned correspondingly, and multiple limiting strips are arranged in pairs on both sides between the top notch and the bottom notch for use in conjunction with them.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. This utility model allows for easy removal of the drying box through the top notch and rotating locking block. At the same time, the drying box is lifted by the spring at the bottom during removal, further facilitating the removal and replacement of the drying box by the staff.

[0013] 2. This utility model, by designing the drying box as a hollow structure, allows limestone to be placed inside when air drying is required, and when air drying is not required, the drying box can be directly installed as a filter component to block external impurities without affecting air circulation, thus increasing the applicability of the drying box.

[0014] 3. By providing a baffle, this utility model can ensure that the internal pressure of the cabinet is greater than that of the outside, thereby ensuring that the internal air is blown out from the exhaust port and preventing outside air from entering the cabinet through the exhaust port, which would affect the drying effect on the air inside the cabinet. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front three-dimensional structure of this utility model.

[0016] Figure 2 For the present utility model Figure 1 A partially enlarged structural diagram.

[0017] Figure 3 For the present utility model Figure 2 A schematic diagram of the back structure.

[0018] Figure 4 This utility model Figure 3 A magnified structural diagram of part A.

[0019] Figure 5 This is an enlarged schematic diagram of the rectangular structure of this utility model.

[0020] Figure 6 This utility model Figure 5 A partially enlarged structural diagram.

[0021] Figure 7 This utility model Figure 6 A magnified structural diagram of part B.

[0022] The attached diagram is labeled as follows: 1. Cabinet body; 2. Square opening; 3. Square frame; 4. Exhaust port; 5. Limiting slide; 6. Baffle; 7. Clearance opening; 8. L-shaped hanging plate; 9. Limiting strip; 10. Drying box; 11. Top notch; 12. Bottom notch; 13. U-shaped plate; 14. Top plate; 15. Spring; 16. Electric fan; 17. Rotating locking block. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Reference Figures 1-7 This utility model provides an atmospheric pressure air-insulated ring main unit, including a cabinet body 1. Square openings 2 are provided on both sides of the cabinet body 1. Square frames 3 are fixedly connected to both square openings 2 by bolts. Electric fans 16 that blow air into the cabinet body 1 are fixedly connected to both square frames 3 by bolts. Top notches 11 and bottom notches 12 are provided on the upper and lower sides of the square frames 3, respectively. Limiting strips 9 are fixedly connected to the inner walls of both sides of the square frames 3 by bolts. A drying box 10 is slidably connected between multiple limiting strips 9. The drying box 10 contains limestone. When drying the cabinet in humid external air, limestone is first put into the drying box 10, and then the drying box 10 is slid down along the top notch 11 on the top square frame 3 until its bottom end is embedded in the bottom notch 12.

[0025] The top notch 11 and the rotating latch 17 work together to make it easy to remove the drying box 10. At the same time, when removing it, the spring 15 at the bottom lifts the drying box 10, making it easier for staff to remove the drying box 10 for replacement.

[0026] Furthermore, the drying box 10 is designed as a hollow structure. When air drying is required, limestone is placed inside the drying box 10. When air drying is not required, the drying box 10 can be directly installed as a filter component to block external impurities without affecting air circulation, thus increasing the applicability of the drying box 10.

[0027] To further facilitate the removal of the drying box 10, a top plate 14 is slidably connected within the bottom notch 12. A U-shaped plate 13 is bolted to the bottom outer wall of the frame 3, located below the bottom notch 12. Multiple springs 15 are welded between the bottom inner wall of the U-shaped plate 13 and the top plate 14. Two sets of exhaust ports 4 are provided on both sides of the cabinet 1, with multiple ports in each set. Rotating locking blocks 17, which cooperate with the drying box 10, are rotatably connected to the top outer wall of the frame 3, located on both sides of the top notch 11. The rotating locking blocks 17 are semi-circular and are used in conjunction with the drying box 10. As the drying box 10 slides downwards, it will press the top plate 14 to slide downwards. As the top plate 14 slides downwards, it will press the spring 15 at its bottom. At this time, the spring 15 is compressed. After the upper surface of the drying box 10 is flush with the top outer wall of the frame 3, rotate the two rotating blocks 17 to limit the top of the drying box 10. When the drying box 10 is taken out, rotate the two rotating blocks 17 to disengage it from the top of the drying box 10. At this time, the spring 15 releases its elastic force and pushes the drying box 10 upwards through the top plate 14, so that the drying box 10 can be pushed out.

[0028] The top notch 11 and the bottom notch 12 are positioned correspondingly, and multiple limiting strips 9 are arranged in pairs on both sides between the top notch 11 and the bottom notch 12 to work together with these two.

[0029] In this utility model, the inner walls of both sides of the cabinet 1 and around the two sets of exhaust ports 4 are fixedly connected with limiting slides 5 by bolts. A baffle 6 is slidably connected in one of the limiting slides 5 on the same side. An avoidance opening 7 is provided on the baffle 6. L-shaped hanging plates 8 that cooperate with the avoidance opening 7 are fixedly connected to the inner walls of both sides of the cabinet 1 and between the two limiting slides 5 by bolts. A downwardly inclined waterproof cover is provided on the outer walls of both sides of the cabinet 1 and on the multiple exhaust ports 4.

[0030] Specifically, after the drying box 10 is installed, the two baffles 6 are slid into one of the limiting slides 5 on both sides of the cabinet 1 to block one of the exhaust ports 4, thereby ensuring that the internal air is blown out from the exhaust port 4 and preventing the outside air from entering the cabinet 1 from the exhaust port 4, which would affect the drying effect on the air inside the cabinet 1.

[0031] After the drying box 10 is installed, the electric fan 16 is turned on to draw in air from the outside. The humid air passes through the limestone inside the drying box 10, which filters the air and absorbs the moisture it contains. The dry air is blown into the cabinet 1 by the electric fan 16. Due to the high air pressure inside the cabinet 1, the air inside flows and is discharged from the remaining exhaust port 4.

[0032] When the outside air does not need to be dried, the limestone inside the drying box 10 can be removed, and the drying box 10 can then be used as a filter component.

[0033] The use of this utility model involves the following steps:

[0034] S1: When drying the outside air, first fill the drying box 10 with limestone, and then slide the drying box 10 down along the top notch 11 on the top frame 3 until its bottom end is embedded in the bottom notch 12.

[0035] S2: During the downward sliding of the drying box 10, the top plate 14 will be pressed to slide downward. During the downward sliding of the top plate 14, the spring 15 at its bottom will be pressed. At this time, the spring 15 is compressed. After the upper surface of the drying box 10 is flush with the top outer wall of the frame 3, the two rotating blocks 17 are rotated to limit the top of the drying box 10. When the drying box 10 is taken out, the two rotating blocks 17 are rotated to disengage it from the top of the drying box 10. At this time, the spring 15 releases its elastic force and pushes the drying box 10 upward through the top plate 14, so that the drying box 10 can be pushed out.

[0036] S3: After the drying box 10 is installed, slide the two baffles 6 into one of the limiting slides 5 on both sides of the cabinet 1 to block one of the exhaust ports 4, ensuring that the air pressure inside the cabinet 1 is greater than the outside air pressure.

[0037] S4: After the drying box 10 is installed, start the electric fan 16 to draw in air from the outside. The humid air passes through the limestone inside the drying box 10 to filter the air and absorb the moisture it contains. The dry air is blown into the cabinet 1 by the electric fan 16. Due to the high air pressure inside the cabinet 1, the air inside flows and is discharged from the remaining exhaust port 4.

[0038] S5: When the outside air does not need to be dried, remove the limestone from the drying box 10. At this time, the drying box 10 can be used as a filter component.

[0039] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0040] The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs.

[0041] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. A normal pressure air insulated ring main unit comprising a cabinet (1), characterized in that: The cabinet (1) has square openings (2) on both sides. A square frame (3) is fixedly connected to each of the two square openings (2). An electric fan (16) for blowing air into the cabinet (1) is fixedly connected to each of the square frames (3). A top notch (11) and a bottom notch (12) are opened on the upper and lower sides of the square frame (3). Limiting strips (9) are fixedly connected to the inner walls of both sides of the square frame (3). A drying box (10) is slidably connected between multiple limiting strips (9). Limestone is placed inside the drying box (10). A top plate (14) is slidably connected inside the bottom notch (12). A U-shaped plate (13) is fixedly connected to the bottom outer wall of the square frame (3) and below the bottom notch (12). Multiple springs (15) are fixedly connected between the bottom inner wall of the U-shaped plate (13) and the top plate (14). Two sets of exhaust ports (4) are opened on both sides of the cabinet (1), and each set has multiple exhaust ports.

2. The normal-pressure air insulated ring main unit according to claim 1, characterized in that: Limiting slides (5) are fixedly connected to both inner walls of the cabinet (1) and around the two sets of exhaust ports (4). A baffle (6) is slidably connected inside one of the limiting slides (5) on the same side.

3. The normal-pressure air insulated ring main unit according to claim 2, characterized in that: The baffle (6) has a clearance opening (7), and L-shaped hanging plates (8) that cooperate with the clearance opening (7) are fixedly connected on both sides of the inner wall of the cabinet (1) and between the two limiting slides (5).

4. The normal-pressure air insulated ring main unit according to claim 1, characterized in that: The top outer wall of the frame (3) and both sides of the top notch (11) are rotatably connected to rotating blocks (17) for use with the drying box (10), and the rotating blocks (17) are semi-circular.

5. The normal-pressure air insulated ring main unit according to claim 3, characterized in that: The cabinet (1) has downward-sloping waterproof covers on both sides of the outer wall and on multiple exhaust ports (4).

6. The normal-pressure air insulated ring main unit according to claim 4, characterized in that: The top notch (11) and the bottom notch (12) are in corresponding positions, and multiple limiting strips (9) are located in pairs on both sides between the top notch (11) and the bottom notch (12) to work together with them.

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