A fully enclosed insulated gas insulated switchgear

Abstract

This utility model discloses a fully enclosed insulated gas-filled cabinet, including a cabinet body, a gas box installed on the cabinet body, and a three-position isolating circuit breaker installed inside the gas box. The top of the outer side of the gas box is provided with multiple external heat sinks, and a crossflow fan is installed on the top of the gas box. The top of the inside of the gas box is provided with multiple first internal heat sinks, and multiple second internal heat sinks are provided on both sides of the inner wall of the gas box. Cooling fans corresponding to the second internal heat sinks are symmetrically installed at the bottom of the inner wall of the gas box. This utility model improves the passive heat dissipation capacity of the gas box through the arrangement of the second internal heat sinks, first internal heat sinks, and external heat sinks. Furthermore, when encountering high load conditions leading to high temperatures, the cooling fans and crossflow fans are automatically activated by a temperature sensor and controller to actively dissipate heat, thereby improving the heat dissipation capacity of the gas box and preventing excessively high temperatures.

Description

Technical Field

[0001] This utility model relates to the field of gas-filled cabinet technology, specifically a fully enclosed insulated gas-filled cabinet. Background Technology

[0002] A fully enclosed insulated gas-filled switchgear is a type of switchgear widely used in power systems. Its core feature is that it uses gas as an insulating and arc-extinguishing medium. It seals electrical components such as circuit breakers, disconnectors, grounding switches, transformers, and busbars inside a gas chamber and fills it with insulating gas to achieve the insulation and arc-extinguishing functions of the electrical equipment.

[0003] However, due to the fully enclosed and insulated nature of the gas-insulated switchgear, the gas inside the gas box is almost in a static state. It cannot rely on natural air convection to remove heat and can only dissipate heat through conduction through the metal shell of the gas box. The heat dissipation efficiency is extremely low. Therefore, under high load conditions, the temperature inside the gas box is prone to become too high. Excessive temperature may not only cause the insulating gas to decompose, leading to a decrease in insulation and arc extinguishing performance, but also accelerate the aging of electrical components inside the gas box, or even cause them to malfunction and fail to work properly. Utility Model Content

[0004] The purpose of this utility model is to provide a fully enclosed insulated gas-filled cabinet to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fully enclosed insulated gas-filled cabinet, comprising a cabinet body, a gas box installed on the cabinet body, and a three-position isolating circuit breaker installed inside the gas box. The top of the outer side of the gas box is provided with multiple external heat sinks, a crossflow fan is installed on the top of the gas box, multiple first internal heat sinks are provided on the top of the inside of the gas box, multiple second internal heat sinks are provided on both sides of the inner wall of the gas box, and cooling fans corresponding to the second internal heat sinks are symmetrically installed at the bottom of the inner wall of the gas box.

[0006] In a preferred embodiment of this utility model, a temperature sensor is installed on the inner wall of the air box, and a controller is installed on the outer side of the crossflow fan. The crossflow fan, the temperature sensor, and the cooling fan are all electrically connected to the controller.

[0007] As a preferred embodiment of this utility model, the plurality of external heat sinks are arranged vertically between the crossflow fan and the heat sink.

[0008] As a preferred embodiment of this utility model, an explosion-proof valve is provided at the center of the bottom of the gas box.

[0009] As a preferred embodiment of this utility model, the front of the gas box is provided with a cable outlet sleeve, and the two side walls of the gas box are provided with side expansion sleeves.

[0010] As a preferred embodiment of this utility model, the air box is provided with reinforcing ribs on both sides.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the second inner heat sink, the first inner heat sink and the outer heat sink can improve the passive heat dissipation capacity of the air box. When encountering high load conditions, resulting in high temperature, the set temperature sensor and controller can automatically start the cooling fan and crossflow fan to carry out active heat dissipation, improve the heat dissipation capacity of the air box and avoid excessive temperature. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0014] Figure 3 This is a schematic diagram of the rear structure of the present invention;

[0015] Figure 4 This utility model Figure 3 Enlarged view of point B in the middle;

[0016] Figure 5 This is a schematic diagram of the internal structure of this utility model;

[0017] Figure 6 This utility model Figure 5 Enlarged view of point C in the middle;

[0018] Figure 7 This utility model Figure 5 Enlarged view of point D in the middle;

[0019] Figure 8 This is a schematic diagram of the structure of the air box of this utility model;

[0020] Figure 9 This is a schematic diagram of the structure of the first inner heat sink, outer heat sink, and crossflow fan of this utility model.

[0021] In the diagram: 1. Cabinet; 2. Air box; 3. External heat sink; 4. Crossflow fan; 5. Controller; 6. First internal heat sink; 7. Reinforcing rib; 8. Explosion-proof valve; 9. Three-position isolating circuit breaker; 10. Side expansion sleeve; 11. Second internal heat sink; 12. Outgoing sleeve; 13. Temperature sensor; 14. Cooling fan. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1 to 9 This utility model provides a technical solution: a fully enclosed insulated gas-filled cabinet, including a cabinet body 1, a gas box 2 installed on the cabinet body 1, the gas box 2 being made of aluminum alloy, which has good thermal conductivity to facilitate heat conduction, and a three-position isolating circuit breaker 9 installed inside the gas box 2. The three-position isolating circuit breaker 9 is existing technology and will not be described in detail. Multiple external heat sinks 3 are provided on the top of the outer side of the gas box 2. Installing the external heat sinks 3 on the top of the gas box 2 will not affect the splicing and use of multiple cabinet bodies 1. A crossflow fan 4 is installed on the top of the gas box 2. The crossflow fan 4 is a fan that generates airflow through impeller rotation, causing air to flow laterally in a direction perpendicular to the axis. The crossflow fan 4 blows air onto the external heat sinks 3, which can accelerate the airflow on the surface of the external heat sinks 3, thereby achieving forced convection. The heat absorbed by the outer heat sink 3 is distributed through the heat sink, thereby improving the heat dissipation capacity of the outer heat sink 3. The top of the air box 2 is provided with multiple first inner heat sinks 6, and both sides of the inner wall of the air box 2 are provided with multiple second inner heat sinks 11. The first inner heat sinks 6 and the second inner heat sinks 11 are used to absorb the heat inside the air box 2 and transfer it to the outer heat sink 3 through the air box 2. The outer heat sink 3 quickly dissipates the heat to the external environment to prevent the temperature inside the air box 2 from getting too high. At the bottom of the inner wall of the air box 2, cooling fans 14 corresponding to the second inner heat sinks 11 are symmetrically installed. The cooling fans 14 are used to blow towards the first inner heat sinks 6 and the second inner heat sinks 11 to accelerate the gas flow on the surface of the first inner heat sinks 6 and the second inner heat sinks 11, so that they can absorb the heat of the insulating gas inside the air box 2 more quickly.

[0024] Temperature sensor 13 is installed on the inner wall of air box 2. Temperature sensor 13 is used to detect the temperature inside air box 2. When the temperature exceeds the set value, temperature sensor 13 sends an electrical signal to controller 5. After receiving the signal, controller 5 starts crossflow fan 4 and cooling fan 14 to improve the heat dissipation capacity of air box 2 and avoid overheating. Controller 5 is installed on the outside of crossflow fan 4. Crossflow fan 4, temperature sensor 13 and cooling fan 14 are all electrically connected to controller 5.

[0025] Among them, multiple external heat sinks 3 are vertically arranged with crossflow fans 4, which allows crossflow fans 4 to blow more comprehensively onto the external heat sinks 3.

[0026] The gas box 2 is equipped with an explosion-proof valve 8 at the center of its bottom. When a short circuit or insulation breakdown occurs in the gas box 2, the high temperature of the electric arc will cause the insulating gas to expand rapidly and generate high pressure instantly. The explosion-proof valve 8 can be opened quickly when the pressure reaches the threshold to release some of the pressure and prevent the gas box 2 from rupturing due to overpressure, thereby improving safety.

[0027] The gas box 2 has a cable outlet sleeve 12 on the front side, which is used to connect to the external cable line. The gas box 2 has side expansion sleeves 10 on both sides, which are used for lateral expansion connection between gas filling cabinets or to add branch circuits to realize system capacity expansion.

[0028] Among them, the air box 2 is provided with reinforcing ribs 7 on both sides. The reinforcing ribs 7 are used to improve the structural strength of the air box 2 and prevent the air box 2 from deforming.

[0029] Specifically, during use, the internal equipment of the air box 2 generates heat. The first inner heat sink 6 and the second inner heat sink 11 absorb the heat inside the air box 2 and transfer it to the outer heat sink 3 through the air box 2. The outer heat sink 3 dissipates the heat to the external environment. At the same time, the air box 2 itself also dissipates some heat to the external environment. This is passive heat dissipation. When encountering high load conditions, the internal equipment of the air box 2 will generate more heat. When the heat generation rate exceeds the heat dissipation rate, the internal temperature of the air box 2 will gradually rise. When the temperature sensor 13 detects that the temperature exceeds the set value, the temperature sensor 13 sends an electrical signal to the controller 5. After receiving the signal, the controller 5 starts the crossflow fan 4 and the cooling fan 14 to improve the heat dissipation capacity of the air box 2 and avoid overheating.

[0030] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fully enclosed insulated gas-filled switchgear, comprising a cabinet (1), a gas box (2) mounted on the cabinet (1), and a three-position isolating circuit breaker (9) installed inside the gas box (2), characterized in that: The top of the outer side of the air box (2) is provided with multiple external heat sinks (3), the top of the air box (2) is equipped with a crossflow fan (4), the top of the inside of the air box (2) is provided with multiple first internal heat sinks (6), the two sides of the inner wall of the air box (2) are provided with multiple second internal heat sinks (11), and the bottom of the inner wall of the air box (2) is symmetrically equipped with cooling fans (14) corresponding to the second internal heat sinks (11).

2. The fully enclosed insulated gas-filled switchgear according to claim 1, characterized in that: A temperature sensor (13) is installed on the inner wall of the air box (2), and a controller (5) is installed on the outer side of the crossflow fan (4). The crossflow fan (4), the temperature sensor (13) and the cooling fan (14) are all electrically connected to the controller (5).

3. The fully enclosed insulated gas-filled switchgear according to claim 1, characterized in that: The multiple external heat sinks (3) are arranged vertically between the crossflow fan (4).

4. The fully enclosed insulated gas-filled switchgear according to claim 1, characterized in that: An explosion-proof valve (8) is provided at the center of the bottom of the gas box (2).

5. A fully enclosed insulated gas-filled switchgear according to claim 1, characterized in that: The front of the gas box (2) is provided with a cable outlet sleeve (12), and the two side walls of the gas box (2) are provided with side expansion sleeves (10).

6. The fully enclosed insulated gas-filled switchgear according to claim 1, characterized in that: The air box (2) is provided with reinforcing ribs (7) on both sides.

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