Sealed air chamber structure for environment-friendly ring main unit

Abstract

The utility model relates to the technical field of electric cabinets, in particular to a sealed air chamber structure for an environment-friendly ring main unit. The sealed air chamber structure for the environment-friendly ring main unit comprises a stainless steel air chamber, wherein the upper end of the stainless steel air chamber is provided with a lifting device and a bus sleeve; a barometer, an inflation valve, a circuit breaker mechanism input hole and an isolation mechanism input hole used for controlling the switching-on, switching-off and grounding states of a primary loop are arranged on a front panel of the stainless steel air chamber, the barometer is communicated with the interior of the air chamber through an air valve, a concave space is arranged below the front panel, and a wire outlet sleeve is arranged in the space. A pressure release valve is arranged at the bottom of the stainless steel air chamber. The whole structure can be flexibly spliced with other standard products, a miniaturized structure is achieved, installation is convenient and fast, and operation is flexible. And the advanced laser welding technology is adopted, so that the welding of the air chamber is firmer and more reliable. The unique L-shaped design enables the internal safety space to be larger, increases the electrical distance, and is safer and more reliable.

Description

Technical Field

[0001] The utility model relates to an air chamber structure, in particular to a sealed air chamber structure used for an environmentally friendly ring network cabinet. Background Art

[0002] Under the premise of vigorously transforming the "dual carbon" new energy, the power transmission and transformation industry has also ushered in a new change. Due to environmental pollution, the original SF6 ring main unit will be gradually cancelled, and the environmentally friendly gas insulated ring main unit will be the main unit in the later stage. Environmentally friendly gas insulation refers to the insulating medium being green and pollution-free gas such as dry air and nitrogen. Its protection level exceeds IP67, and 0.02MPa of environmentally friendly gas is filled inside as an insulating medium. It is widely used in 10kV~35kV ring network distribution equipment. Utility Model Content

[0003] The utility model aims to solve the above defects and provides a sealed air chamber structure for an environmentally friendly ring network cabinet.

[0004] In order to overcome the defects existing in the background technology, the technical solution adopted by the utility model to solve its technical problems is: this sealed air chamber structure for the environmentally friendly ring network cabinet includes a stainless steel air chamber surrounded by a front panel, a back panel and side panels on both sides. The stainless steel air chamber is in the shape of a rectangular parallelepiped, and a lifting device is provided at the upper end of the stainless steel air chamber. A busbar bushing is also provided at the upper end of the stainless steel air chamber. A pressure gauge, an air charging valve, a circuit breaker mechanism input hole and an isolation mechanism input hole for controlling the closing, opening and grounding status of the primary circuit are provided on the front panel of the stainless steel air chamber. The pressure gauge is connected to the inside of the air chamber through an air valve, a recessed space is provided below the front panel, a line outlet bushing is provided in the space, and a pressure relief valve is provided at the bottom of the stainless steel air chamber.

[0005] According to another embodiment of the utility model, the lifting device is further provided with two groups, which are located on both sides of the top of the cabinet, and the vertical plates of the lifting device are provided with guide holes. The lifting device is also provided with reinforcing ribs, which are buckled on the vertical plates.

[0006] According to another embodiment of the utility model, the number of the reinforcing ribs is 3.

[0007] According to another embodiment of the utility model, a busbar bushing pressure plate is further provided at the upper end of the cabinet and at the busbar bushing.

[0008] According to another embodiment of the utility model, the outlet bushing is further provided with an outlet bushing pressing plate, and the outlet bushing is pressed and fixed to the outer shell of the stainless steel air chamber by the outlet bushing pressing plate.

[0009] According to another embodiment of the present utility model, it further includes that the stainless steel gas chamber is formed by laser welding of 2.5mm stainless steel plates, wherein the back panel and the two side panels are both flat structures, and the lower end of the front panel is provided with an inward concave L-shaped step.

[0010] According to another embodiment of the present utility model, it further includes that the bushing is arranged at the central position on the top of the stainless steel gas chamber. The number of bushings is three, the upper half of which is exposed outside the gas chamber and the lower half is inserted into the gas chamber.

[0011] According to another embodiment of the present utility model, it further includes that the number of outgoing line bushings is three, the upper half of which is exposed outside the gas chamber and the lower half is inserted into the gas chamber.

[0012] The beneficial effects of the present utility model are as follows: This sealed gas chamber structure for an environmentally friendly ring main unit can be flexibly spliced with other standard products, and has a miniaturized structure, convenient installation and flexible operation. The advanced laser welding technology is adopted to make the welding of the gas chamber more firm and reliable. The unique L-shaped design makes the internal safety space larger, increases the electrical distance, and is safer and more reliable. Description of the Drawings

[0013] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0014] Figure 1 is the structural schematic diagram of the present utility model;

[0015] Figure 2 is the structural schematic diagram of the front view of the present utility model;

[0016] Figure 3 is the structural schematic diagram of the side view of the present utility model;

[0017] Among them: 1. Lifting device, 2. Bushing, 3. Pressure gauge, 4. Input hole of isolation mechanism, 5. Input hole of circuit breaker mechanism, 6. Outgoing line bushing, 7. Bushing pressing plate for bus, 8. Inflation valve, 9. Stainless steel gas chamber, 10. Pressing plate for outgoing line pipe, 11. Pressure relief valve, 12. Reinforcing rib, 13. Guide hole, 14. Gas valve. Detailed Embodiment

[0018] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present utility model belong to the scope of protection of the present utility model.

[0019] Such asFigures 1-3 As shown in the figure, in the sealed gas chamber structure for an environmentally friendly ring main unit, the primary conductor and transmission components of the switch are installed inside it. It includes a stainless-steel gas chamber 9 surrounded by a front panel, a rear panel, and two side panels on the sides. The stainless-steel gas chamber 9 is in the shape of a cuboid. A lifting device 1 is provided at the upper end of the stainless-steel gas chamber 9. A bushing 2 is also provided at the upper end of the stainless-steel gas chamber 9. A pressure gauge 3, an inflation valve 8, a circuit breaker mechanism input hole 5, and an isolating mechanism input hole 4 for controlling the closing, opening, and grounding states of the primary circuit are provided on the front panel of the stainless-steel gas chamber 9. The pressure gauge 3 is connected to the inside of the gas chamber through a gas valve 14. A concave space is provided below the front panel, and an outgoing line bushing 6 is provided at this space. A pressure relief valve 11 is provided at the bottom of the stainless-steel gas chamber 9. The pressure gauge 3 is installed at the upper right of the front of the stainless-steel gas chamber 9 and is connected to the inside of the stainless-steel gas chamber 9 through the gas valve 14, and can accurately display the internal pressure value of the gas chamber. The inside of the isolating mechanism input hole 4 is connected to the stainless-steel gas chamber 9, and an isolating mechanism is installed outside for controlling the closing, opening, and grounding states of the primary circuit. The circuit breaker mechanism input hole 5 is also connected to the gas chamber inside, and a circuit breaker mechanism is installed outside for controlling the opening and closing states of the vacuum circuit breaker in the primary circuit. The circuit breaker mechanism is fixed through the studs on the front of the gas chamber. The inflation valve 8 is installed below the pressure gauge 3 for filling gas into the gas chamber. The pressure relief valve 11 is installed at the bottom of the stainless-steel gas chamber 9. The pressure relief valve is also sealed with the bottom of the gas chamber, and there is an explosion-proof diaphragm inside. When a short circuit or arc fault occurs inside the gas chamber, the internal pressure of the gas chamber increases sharply, thereby breaking through the explosion-proof diaphragm to achieve the purpose of releasing pressure.

[0020] There are two sets of lifting devices 1, located on both sides of the top of the cabinet body 15. Guide holes 13 are provided on the vertical plates of the lifting devices 1. Reinforcing ribs 12 are also provided on the lifting devices 1, and the reinforcing ribs 12 are buckled on the vertical plates. The number of the reinforcing ribs 12 is three. There are two guide holes 13 on the front and rear sides of the lifting device 1. When parallel cabinets are combined, the guide holes 13 are used to align other equipment, and are bolt-fixed with other equipment through the reinforcing ribs 12 to prevent the sheet metal from deforming during cabinet combination due to insufficient strength.

[0021] At the upper end of the cabinet body 15 and at the bushing 2, a bushing pressing plate 7 is provided. When the bushing pressing plate 7 is installed, it is sleeved on the bushing 2, compresses the bushing 2 and is fixed to the top of the gas chamber through studs. A sealing ring is provided between the installation surface of the bushing 2 and the gas chamber to prevent internal air leakage. The bushing 2 is arranged at the central position on the top of the stainless-steel gas chamber 9. The number of the bushings 2 is three. The upper half of it is exposed outside the gas chamber and the lower half is inserted into the gas chamber.

[0022] The outgoing line bushing 6 is provided with an outgoing line bushing pressure plate 10, which is pressed and fixed on the outer shell of the stainless steel gas chamber 9 through the outgoing line bushing pressure plate 10. A sealing ring is provided on the installation surface to ensure no air leakage. The number of outgoing line bushings 6 is three, arranged horizontally, with the upper half exposed outside the gas chamber and the lower half inserted into the gas chamber.

[0023] The stainless steel gas chamber 9 is made of 2.5mm stainless steel plate by laser welding. The back panel and the two side panels are both flat structures, and the lower end of the front panel is provided with an inward concave L-shaped step.

[0024] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A sealed air chamber structure for an environmentally friendly ring main unit, comprising a stainless steel air chamber (9) surrounded by a front panel, a back panel and side panels, characterized in that: The stainless steel air chamber (9) is in the shape of a rectangular parallelepiped. A lifting device (1) is provided at the upper end of the stainless steel air chamber (9). A busbar bushing (2) is also provided at the upper end of the stainless steel air chamber (9). A pressure gauge (3), an air charging valve (8), a circuit breaker mechanism input hole (5), and an isolation mechanism input hole (4) for controlling the closing, opening, and grounding states of a primary circuit are provided on the front panel of the stainless steel air chamber (9). The pressure gauge (3) is connected to the interior of the air chamber via an air valve (14). A recessed space is provided below the front panel, and an outlet bushing (6) is provided in the space. A pressure relief valve (11) is provided at the bottom of the stainless steel air chamber (9).

2. A sealed air chamber structure for an environmentally friendly ring main unit as claimed in claim 1, characterized in that: The lifting device (1) is provided with two groups, which are located on both sides of the top of the cabinet (15). A guide hole (13) is provided on the vertical plate of the lifting device (1). The lifting device (1) is also provided with a reinforcing rib (12), which is buckled on the vertical plate.

3. A sealed air chamber structure for an environmentally friendly ring main unit as claimed in claim 2, characterized in that: The number of the reinforcing ribs (12) is 3.

4. A sealed air chamber structure for an environmentally friendly ring main unit as claimed in claim 2, characterized in that: A busbar bushing pressure plate (7) is provided at the upper end of the cabinet (15) and at the busbar bushing (2).

5. The sealed air chamber structure for an environmentally friendly ring main unit according to claim 1, characterized in that: The outlet bushing (6) is provided with an outlet bushing pressing plate (10), which is used to press and fix the outlet bushing on the outer shell of the stainless steel air chamber (9).

6. A sealed air chamber structure for an environmentally friendly ring main unit as claimed in claim 1, characterized in that: The stainless steel air chamber (9) is made of 2.5 mm stainless steel plates by laser welding, wherein the back panel and two side panels are flat plate structures, and the lower end of the front panel is provided with an inwardly concave L-shaped step.

7. A sealed air chamber structure for an environmentally friendly ring main unit as claimed in claim 1, characterized in that: The busbar bushings (2) are arranged at the top center of the stainless steel air chamber (9). There are three busbar bushings (2), the upper half of which is exposed outside the air chamber and the lower half is inserted into the air chamber.

8. The sealed air chamber structure for an environmentally friendly ring main unit according to claim 1, characterized in that: The number of the outlet bushings (6) is three, the upper half of which is exposed outside the air chamber and the lower half is inserted into the air chamber.

Images