Armoured movable AC metal-enclosed switchgear for 12 kv

Abstract

The utility model relates to the technical field of switch device, concretely relates to a kind of armored move-off type ac metal-enclosed switchgear suitable for 12KV, comprising: cabinet, for installing switch instrument;The cabinet is divided into heat conduction cavity and instrument cavity, the heat conduction cavity and instrument cavity between are provided with partition, the inside of heat conduction cavity is divided into several heat dissipation fins for heat conduction, and heat dissipation fin is set on the four faces of cabinet, several heat dissipation fins pass through the shell of cabinet and extend to the outside of cabinet, the bottom of the inside of instrument cavity is also fixed with several negative pressure fans, and negative pressure fan can suck the air in instrument cavity into heat conduction cavity.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, specifically to an armored withdrawable AC metal-enclosed switchgear suitable for 12KV. Background Technology

[0002] In power transmission and distribution networks, 12kV armored withdrawable AC metal-enclosed switchgear, as a key power control and protection device, is widely used in power distribution systems of industrial enterprises, residential communities, and municipal engineering projects. It undertakes important functions such as power distribution, control, protection, and fault isolation. Its operational safety, reliability, and economy directly affect the stable operation of the entire power distribution network, playing a crucial role in ensuring the continuity of power supply and reducing power outage losses. With the continuous development of the power industry, users are placing increasingly higher demands on the performance of power distribution equipment. This fully enclosed feature completely isolates internal instruments from the external environment, effectively preventing the intrusion of external pollutants such as dust, moisture, and corrosive gases. It avoids faults such as short circuits and decreased insulation performance caused by dust accumulation and moisture in the internal circuits, significantly improving the operational stability of the equipment in complex environments. Therefore, it is widely used in industrial plants, commercial complexes, urban power distribution networks, and other scenarios with high equipment protection requirements.

[0003] However, while the fully enclosed enclosure provides excellent dust protection, it also presents a significant heat dissipation challenge. Core components inside the equipment, such as circuit breakers, instrument transformers, and busbars, continuously generate a large amount of heat during operation, especially under high load conditions, where heat accumulation accelerates considerably. Due to limited air exchange between the enclosure and the outside environment, traditional natural cooling methods are insufficient to dissipate internal heat in a timely manner, causing the internal temperature to rise continuously. Utility Model Content

[0004] The purpose of this utility model is to provide an armored withdrawable AC metal-enclosed switchgear suitable for 12KV, which enables the device to dissipate heat quickly and effectively by means of a negative pressure fan and heat dissipation fins.

[0005] To address the existing technical problems, this utility model provides an armored withdrawable AC metal-enclosed switchgear suitable for 12KV, comprising: a housing for mounting switchgear; the housing is divided into a heat-conducting cavity and an instrument cavity, with a partition plate between the heat-conducting cavity and the instrument cavity; the interior of the heat-conducting cavity is divided into several heat-conducting fins, which are disposed on the four sides of the housing; the heat-conducting fins pass through the housing shell and extend to the outside of the housing; several negative pressure fans are fixed at the bottom inside the instrument cavity, and the negative pressure fans can draw air from the instrument cavity into the heat-conducting cavity.

[0006] Preferably, there are gaps between adjacent heat dissipation fins for airflow.

[0007] Preferably, the housing is further provided with several air outlets, which are used to connect the heat conduction cavity and the instrument cavity.

[0008] Preferably, the instrument cavity is further provided with a fire extinguishing component for extinguishing fires in the instrument cavity, and a smoke sensor for detecting smoke in the instrument cavity is also provided inside the instrument cavity.

[0009] Preferably, the fire extinguishing assembly includes a storage tank installed at the top inside the instrument cavity, and the outlet end of the storage tank is connected to a diversion pipe, and a solenoid valve is also provided between the storage tank and the diversion pipe.

[0010] Preferably, the fire extinguishing assembly further includes a nozzle connected to both ends of the diversion pipe, and the nozzle is provided with a plurality of spray holes. The nozzle is fixed to the inner wall of the instrument cavity by a snap fastener.

[0011] Preferably, the front of the enclosure is provided with a door for sealing, and the door is also provided with several switch buttons and instruments.

[0012] Preferably, the heat dissipation fins are made of copper or aluminum.

[0013] The advantages of this utility model compared to the prior art are:

[0014] This application constructs a highly efficient heat dissipation channel by setting up independent heat-conducting cavities and instrument cavities inside the enclosure. The heat-conducting cavity is equipped with several heat dissipation fins, with gaps between adjacent fins to allow airflow. The fins extend to the outside of the enclosure, forming a bridge for heat exchange between the inside and outside. During operation, driven by a negative pressure fan, hot air from the instrument cavity is drawn into the heat-conducting cavity. As the hot air flows through the gaps between the heat dissipation fins, heat is transferred to the fins through thermal conduction. Because the heat dissipation fins are in direct contact with the external environment, and the numerous fins significantly increase the heat conduction area, heat can be quickly dissipated to the external environment. The cooled air then flows back into the instrument cavity. This structural design maintains the fully enclosed nature of the enclosure to ensure dust prevention, while the synergistic effect of the heat-conducting cavity and heat dissipation fins achieves directional and efficient heat removal, significantly improving the device's heat dissipation efficiency and effectively solving the heat dissipation problem in fully enclosed structures. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an armored withdrawable AC metal-enclosed switchgear suitable for 12KV.

[0016] Figure 2This is an exploded structural diagram of an armored withdrawable AC metal-enclosed switchgear suitable for 12KV.

[0017] Figure 3 This is a schematic diagram of the first internal structure of an armored withdrawable AC metal-enclosed switchgear suitable for 12KV.

[0018] Figure 4 This is a schematic diagram of the second internal structure of an armored withdrawable AC metal-enclosed switchgear suitable for 12KV.

[0019] Figure 5 This is a schematic diagram of the third internal structure of an armored withdrawable AC metal-enclosed switchgear suitable for 12KV.

[0020] Figure 6 This is a three-dimensional structural diagram of a fire extinguishing component suitable for a 12KV armored withdrawable AC metal-enclosed switchgear.

[0021] The following are the labels in the diagram: 1. Box body; 11. Box door; 111. Switch button; 112. Instrument; 12. Heat conduction chamber; 13. Sealing cover; 14. Instrument chamber; 15. Air outlet; 2. Negative pressure fan; 3. Heat dissipation fins; 4. Fire extinguishing assembly; 41. Storage tank; 411. Solenoid valve; 42. Nozzle; 421. Nozzle hole; 43. Diverter pipe. Detailed Implementation

[0022] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0023] Reference Figures 1-6As shown, this utility model provides a 12KV armored withdrawable AC metal-enclosed switchgear, comprising: a housing 1 for mounting switchgear instruments; the housing 1 serves as the main structure of the equipment, undertaking the core function of installing and protecting the internal switchgear instruments. Its enclosed design effectively isolates external dust, moisture, and other contaminants, providing a stable operating environment for the internal components. The housing 1 is internally divided into a heat-conducting cavity 12 and an instrument cavity 14. A sealing cover 13 is also provided on the outside of the heat-conducting cavity 12. A partition plate is provided between the heat-conducting cavity 12 and the instrument cavity 14. The interior of the heat-conducting cavity 12 is divided into several heat-conducting fins 3, which are disposed on the four sides of the housing 1. These fins 3 pass through the housing shell and extend to the outside of the housing 1. Several negative pressure fans 2 are fixed to the bottom inside the instrument cavity 14, and these fans draw air from the instrument cavity 14 into the heat-conducting cavity 12. The negative pressure fans 2 serve as a power source to drive airflow circulation. By generating negative pressure, the air heated by the components inside the instrument cavity 14 is drawn into the heat-conducting cavity 12, forming a directional airflow. This ensures that the heat inside the instrument cavity 14 is continuously carried into the heat dissipation area, preventing heat accumulation around the instrument. Airflow gaps exist between adjacent heat dissipation fins 3. The heat dissipation fins 3 are made of copper or aluminum, and are key components for heat transfer due to their high thermal conductivity. Several heat dissipation fins 3 distributed on the four sides of the housing 1 increase the contact area with air, improving heat dissipation efficiency. Their design, extending through the housing 1 to the outside, creates a channel for internal heat transfer to the external environment, utilizing the thermal conductivity of metal to quickly dissipate heat from the heat-conducting cavity 12. The airflow gaps between adjacent fins provide a path for airflow.

[0024] During equipment operation, the switching instruments within instrument chamber 14 generate heat, raising the air temperature inside the chamber. At this time, the negative pressure fan 2 activates, creating negative pressure within instrument chamber 14 and drawing hot air into the heat conduction chamber 12. Once inside the heat conduction chamber 12, the hot air flows through the gaps between the heat dissipation fins 3, transferring heat to the fins via thermal conduction. Because the heat dissipation fins 3 extend to the outside of the housing 1 and are made of highly thermally conductive material, heat is rapidly conducted from the inside of the fins 3 to the external surface. Then, through convection heat exchange between the heat dissipation fins 3 and the surrounding cold air, the heat is dissipated into the environment. During this process, the partition plate ensures the independent operation of the two chambers, preventing airflow turbulence from affecting heat dissipation efficiency; the multi-faceted distribution and gap design of the heat dissipation fins 3 maximize the heat dissipation area and airflow contact efficiency; and the negative pressure fan 2 drives the directional flow of heat, forming a complete heat dissipation cycle of "heat generation—collection—transfer—dissipation." This structure, while maintaining the fully enclosed dustproof advantage of housing 1, achieves rapid heat removal through a combination of active airflow drive and efficient heat conduction, effectively solving the heat dissipation problem of fully enclosed equipment.

[0025] The housing 1 also has several air outlets 15, which are used to connect the heat conduction chamber 12 to the instrument chamber 14. The cooled air re-enters the instrument chamber 14 for circulation.

[0026] The instrument chamber 14 is also equipped with a fire extinguishing component 4 for extinguishing fires within the chamber, and a smoke sensor for detecting smoke within the chamber. The fire extinguishing component 4 includes a storage tank 41 installed at the top of the instrument chamber 14, with a diversion pipe 43 connected to the outlet of the tank 41. The storage tank 41 serves as the core safety protection component of the instrument chamber 14, used to quickly suppress fires in the event of an outbreak. The storage tank 41 stores extinguishing media (such as clean inert gas, dry ice, etc.), providing the material basis for fire extinguishing. A solenoid valve 411 is also installed between the storage tank 41 and the diversion pipe 43. The smoke sensor monitors the smoke concentration within the chamber in real time. When excessive smoke is detected (potential fire), a trigger signal is immediately sent to the solenoid valve 411 of the fire extinguishing component 4 to initiate the fire extinguishing procedure, enabling early response and handling of fires. The fire extinguishing assembly 4 also includes a nozzle 42 connected to both ends of the diversion pipe 43, and the nozzle 42 is provided with a number of nozzle holes 421. The nozzle 42 is fixed to the inner wall of the instrument cavity 14 by a snap fastener.

[0027] When a fire breaks out in the instrument chamber 14 due to overheating or circuit failure, the smoke sensor first detects the smoke signal and controls the solenoid valve 411 of the fire extinguishing component 4 to open. The fire extinguishing medium in the storage tank 41 flows into the diversion pipe 43 under pressure. After diversion, it is evenly sprayed into the key areas of the instrument chamber 14 through the nozzle 421 on the nozzle 42, quickly isolating oxygen or inhibiting the combustion reaction, thereby controlling the spread of the fire in a short time and protecting the internal instruments from damage.

[0028] The front of the enclosure 1 is equipped with a sealing door 11, which also has several switches 111 and instruments 112. The switches 111 serve as the operating interface for the equipment, controlling key actions such as starting, stopping, opening, and closing of the switching instruments within the instrument chamber 14, enabling convenient control of the equipment's operating status. The instruments 112 display the equipment's operating parameters (such as voltage and current) in real time, providing maintenance personnel with intuitive equipment status information, facilitating timely monitoring of equipment operation and identification of any abnormalities.

[0029] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A 12KV armored withdrawable AC metal-enclosed switchgear, characterized in that, include: The enclosure (1) is used to install the switching instrument; The interior of the housing (1) is divided into a heat conduction cavity (12) and an instrument cavity (14). A partition plate is provided between the heat conduction cavity (12) and the instrument cavity (14). The interior of the heat conduction cavity (12) is divided into several heat dissipation fins (3) for heat conduction. The heat dissipation fins (3) are arranged on the four sides of the housing (1). The heat dissipation fins (3) pass through the shell of the housing (1) and extend to the outside of the housing (1). Several negative pressure fans (2) are also fixed at the bottom of the instrument cavity (14). The negative pressure fans (2) can draw air from the instrument cavity (14) into the heat conduction cavity (12).

2. The armored withdrawable AC metal-enclosed switchgear according to claim 1, characterized in that, There are gaps for airflow between adjacent heat dissipation fins (3).

3. The armored withdrawable AC metal-enclosed switchgear according to claim 1, characterized in that, The box (1) is also provided with several air outlets (15), which are used to connect the heat conduction cavity (12) and the instrument cavity (14).

4. The armored withdrawable AC metal-enclosed switchgear according to claim 1, characterized in that, The instrument cavity (14) is also equipped with a fire extinguishing component (4) for extinguishing fires in the instrument cavity (14), and a smoke sensor for detecting smoke in the instrument cavity (14) is also equipped inside the instrument cavity (14).

5. A 12KV armored withdrawable AC metal-enclosed switchgear according to claim 4, characterized in that, The fire extinguishing assembly (4) includes a storage tank (41) installed at the top inside the instrument chamber (14), and the outlet end of the storage tank (41) is connected to a diversion pipe (43). A solenoid valve (411) is also provided between the storage tank (41) and the diversion pipe (43).

6. A 12KV armored withdrawable AC metal-enclosed switchgear according to claim 5, characterized in that, The fire extinguishing assembly (4) also includes a nozzle (42) connected to both ends of the diversion pipe (43), and the nozzle (42) is provided with a number of nozzle holes (421). The nozzle (42) is fixed to the inner wall of the instrument cavity (14) by a snap fastener.

7. A 12KV armored withdrawable AC metal-enclosed switchgear, as described in claim 1, is characterized in that, The front of the enclosure (1) is also provided with a door (11) for sealing, and the door (11) is also provided with several switch buttons (111) and instruments (112).

8. A 12KV armored withdrawable AC metal-enclosed switchgear, as described in claim 1, is characterized in that, The heat dissipation fins (3) are made of copper or aluminum.

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