Low-voltage draw-out type switch cabinet

Abstract

The utility model relates to the technical field of switch cabinets, in particular to a low-voltage draw-out type switch cabinet which improves heat dissipation efficiency, optimizes space utilization, enhances reliability and is convenient to maintain. Comprising a cabinet body which is independently and fixedly arranged, an installation area is arranged in the cabinet body, and multiple air inlet holes are formed in the two sides of the cabinet body in a communicating mode; the multiple bearing plates are all installed in the installation area, and the installation area is divided into multiple drawer containing cavities by the bearing plates; the plurality of drawer type function units are arranged in the drawer accommodating cavity in a sliding manner; the guide rollers are installed at the bottoms of the bearing plates, cavities are formed in the guide rollers, and a plurality of air suction holes communicating with the cavities are formed in the guide rollers; and the air guide mechanisms are communicated with the guide rollers and are used for conveying heat generated by the drawer type functional units mounted in the corresponding drawer accommodating cavities to the outside.

Description

Technical Field

[0001] This utility model relates to the technical field of switchgear, and in particular to a low-voltage withdrawable switchgear. Background Technology

[0002] A switchgear is a type of power distribution equipment used in power systems. It is mainly used to distribute electrical energy and to control, protect, and monitor circuits. It is mainly used in power plants, substations, factories, buildings, and other places, where various electrical components (such as circuit breakers, disconnect switches, transformers, fuses, contactors, relays, etc.) are combined and installed in a closed or semi-closed metal cabinet.

[0003] Low-voltage withdrawable switchgear is a specially designed low-voltage power distribution device. Its core is a drawer-type functional unit, facilitating maintenance and repair. The unit is reliably connected to the busbar and cables via connectors. During normal operation, electrical energy is delivered to the outgoing cables via the busbar, connectors, and electrical components. In case of a fault, the protective device inside the branch drawer activates, allowing the drawer to be withdrawn for repair and power restoration. Low-voltage withdrawable switchgear is widely used in power distribution systems in industrial and civil buildings, especially in locations requiring frequent operation or maintenance, such as data centers and factory workshops.

[0004] Low-voltage drawer-type switchgear generates heat during use and operation. Because the drawer-type functional units are placed layer by layer, they affect the air circulation path, and the heat cannot be dissipated quickly, which increases the wear and tear on the switchgear and is not conducive to extending the service life of the device. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a low-voltage withdrawable switch cabinet that improves heat dissipation efficiency, optimizes space utilization, enhances reliability, and facilitates maintenance.

[0006] The low-voltage withdrawable switchgear of this utility model includes:

[0007] The cabinet is independently and fixedly installed, with an internal installation area and multiple air inlets on both sides of the cabinet.

[0008] Multiple support plates are provided, all installed within the installation area, and the installation area is divided into multiple drawer accommodating cavities;

[0009] Multiple drawer-type functional units are provided, all of which are slidably installed in the drawer receiving cavity;

[0010] Multiple guide rollers are installed at the bottom of each bearing plate. The guide rollers have cavities inside and multiple air suction holes that communicate with the cavities.

[0011] The air guide mechanism, connected to the guide roller, is used to transport the heat generated by the drawer-type functional unit installed in the corresponding drawer accommodating cavity to the outside.

[0012] Furthermore, multiple guide rollers are spaced apart along the length of the support plate, and the length of the guide rollers corresponds to the drawer receiving cavity.

[0013] Furthermore, the suction holes are arranged in multiple rows along the central axis of the guide roller, and each row includes multiple suction holes arranged at intervals.

[0014] Furthermore, the air guiding mechanism includes:

[0015] The suction hood is installed on one side of the guide roller and is connected to the guide roller;

[0016] The fan is installed inside the suction hood;

[0017] The duct is connected to the exhaust hood, with one end of the duct passing through the cabinet and extending to the outside.

[0018] Furthermore, the outer wall of the cabinet is provided with a channel for the conduit to pass through, and a guide sleeve that cooperates with the conduit is embedded in the channel.

[0019] Furthermore, the air intake and the passage are located at the front and rear of the cabinet, respectively.

[0020] Furthermore, dustproof nets are installed inside the air inlet and on the side of the guide roller closest to the fan.

[0021] Furthermore, a temperature sensor is installed inside the cabinet. The temperature sensor is electrically connected to the fan, and the fan's operating status is adjusted through an external controller.

[0022] Furthermore, the cabinet sidewalls are provided with grooves, and multiple air inlets are located within the grooves.

[0023] Furthermore, each support plate and drawer-type functional unit is provided with multiple ventilation holes.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] 1. By designing cavities and air suction holes inside the guide rollers and combining them with the air guiding mechanism, the heat generated by the drawer-type functional unit can be effectively guided from the inside of the drawer to the outside, thereby solving the problem of heat accumulation inside traditional low-voltage withdrawable switch cabinets and improving heat dissipation efficiency.

[0026] 2. The drawer-type design itself has the advantage of saving space, and this utility model further ensures good air circulation even in a compact space through a reasonable heat dissipation structure layout, which is conducive to the long-term stable operation of the equipment and improves space utilization.

[0027] 3. An effective heat dissipation mechanism helps reduce the probability of electrical component damage due to overheating, extends equipment lifespan, reduces maintenance costs and downtime risks, and enhances the overall reliability of the system.

[0028] 4. The heat dissipation structure is optimized based on the drawer-type design by using a support plate, guide rollers and air guide mechanism, so as not to affect the inspection and maintenance of each drawer-type functional unit. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0032] Figure 3 This is a partial structural schematic diagram of the present invention;

[0033] Figure 4 yes Figure 3 Partial cross-sectional structural schematic diagram;

[0034] The following are labels in the attached diagram: 1. Cabinet; 11. Air inlet; 12. Recess; 2. Support plate; 21. Ventilation hole; 3. Drawer-type functional unit; 4. Guide roller; 41. Cavity; 42. Air suction hole; 5. Air guide mechanism; 51. Air suction hood; 52. Fan; 53. Duct. Detailed Implementation

[0035] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0036] like Figures 1 to 4 As shown, the low-voltage withdrawable switchgear of this utility model includes: a cabinet 1, which is independently fixed and has an installation area inside, and multiple air inlets 11 are connected to both sides of the cabinet 1; multiple support plates 2, which are installed in the installation area and divide the installation area into multiple drawer cavities; multiple drawer-type functional units 3, which are slidably installed in the drawer cavities; multiple guide rollers 4, which are installed at the bottom of each support plate 2, and have cavities 41 inside the guide rollers 4, and multiple air suction holes 42 connected to the cavities 41; and an air guiding mechanism 5, which is connected to the guide rollers 4 and is used to transport the heat generated by the drawer-type functional units 3 installed in the corresponding drawer cavities to the outside.

[0037] Cabinet 1 serves as the basic structure of the entire switchgear, providing necessary mechanical support and protecting the internal electrical components from external environmental influences. The support plate 2 supports the drawer-type functional units 3 and effectively utilizes space by dividing the installation area into multiple drawer cavities. This allows for the rational arrangement and isolation of electrical components with different functions, facilitating maintenance and operation. The drawer-type design allows users to replace or repair specific functional units without disconnecting the entire system, improving system availability and flexibility. This modular design helps reduce troubleshooting time and costs. Multiple air inlets 11 allow for the introduction of external cool air, while the air guide mechanism 5 absorbs heat generated by the drawer-type functional units 3 through the cavity 41 inside the guide roller 4 and the suction hole 42, effectively transferring it to the outside environment. This ensures that the temperature inside cabinet 1 remains within a safe range, improving the heat dissipation efficiency of cabinet 1.

[0038] Multiple guide rollers 4 are spaced apart along the length of the support plate 2, and the length of the guide rollers 4 corresponds to the drawer receiving cavity; this design can more effectively guide and dissipate the heat generated by the drawer-type functional unit 3, further improving heat dissipation efficiency.

[0039] To achieve better results, the suction holes 42 are arranged in multiple rows along the central axis of the guide roller 4, with each row including multiple spaced suction holes 42. The multiple rows of spaced suction holes 42 ensure that the cavity 41 inside the guide roller 4 forms a uniform airflow channel with the external air. The air guiding mechanism 5 works in conjunction with the multiple rows of suction holes 42 on the guide roller 4 to more effectively guide and exhaust the heat generated by the drawer-type functional unit 3, allowing the air guiding mechanism 5 to better control the airflow direction and intensity, ensuring that the heat is quickly discharged from the cabinet. Uniform heat dissipation and stable airflow distribution reduce the risk of failure due to overheating and improve the overall reliability of the system. Higher reliability means a longer service life and lower maintenance costs.

[0040] Specifically, the air guiding mechanism 5 includes: a suction hood 51, installed on one side of the guide roller 4 and connected to the guide roller 4; a fan 52, installed inside the suction hood 51; and a duct 53, connected to the suction hood 51, with one end of the duct 53 penetrating through the cabinet 1 and extending to the outside. The suction hood 51 collects hot air entering the guide roller 4 through the suction hole 42, ensuring concentrated airflow and effective guidance. The fan 52 generates negative pressure, attracting hot air through the suction hole 42 into the guide roller 4, and then exhausting it through the suction hood 51. This active cooling method can quickly reduce the temperature inside the cabinet 1, ensuring that the electrical equipment operates in a suitable working environment. The duct 53 guides the hot air inside the suction hood 51 to the outside of the cabinet 1, ensuring that the heat is completely exhausted. The reasonable design of the suction hood 51 and the duct 53 can reduce airflow turbulence and reduce the noise of the fan 52 during operation. The lower noise level improves the operating environment of the equipment and enhances the user experience.

[0041] To ensure that the conduit 53 does not loosen or shift during installation and use, a channel is provided on the outer wall of the cabinet 1 for the conduit 53 to pass through. A guide sleeve that mates with the conduit 53 is embedded in the channel. The channel ensures that the conduit 53 can pass smoothly through the outer wall of the cabinet 1 without affecting the overall structure and sealing of the cabinet 1. The guide sleeve mates with the conduit 53 to provide a sealed and secure connection, ensuring that there is no air leakage or water ingress at the interface between the conduit 53 and the cabinet 1, which would affect the normal operation of the electrical equipment.

[0042] To further improve the heat dissipation effect of the above embodiment, the air inlet 11 and the channel are located at the front and rear of the cabinet 1, respectively. The air inlet 11 is used to introduce external cold air to provide fresh cooling air to the cabinet 1. The channel is used to accommodate the duct 53 and exhaust the hot air in the cabinet 1 to the outside. This design forms an airflow path from front to back, reduces the detour and resistance of the airflow, improves the heat dissipation efficiency, and allows the cold air to fully contact the heat source, thereby improving the overall efficiency of the heat dissipation system.

[0043] To ensure the normal operation of electrical equipment and prevent dust and impurities from entering the cabinet 1, dustproof nets are installed inside the air inlet 11 and on the side of the guide roller 4 near the fan 52. The air inlet 11 is the main entrance for external cold air to enter the cabinet 1. The dustproof net can effectively filter the incoming air, preventing dust and other impurities from entering the cabinet 1 with the air, thereby avoiding dust accumulation on the surface of electrical equipment and affecting heat dissipation and equipment performance. The cavity 41 and suction hole 42 inside the guide roller 4 are used to extract hot air from the cabinet 1. The dustproof net on the side of the guide roller 4 near the fan 52 can prevent dust and impurities from entering the fan 52 through the suction hole 42, thus affecting the normal operation of the fan 52. The dustproof net is detachable, and regular cleaning of the dustproof net can maintain its filtering effect and ensure the air quality inside the cabinet 1.

[0044] To ensure the safe operation and efficient heat dissipation of the switchgear, a temperature sensor is installed inside cabinet 1, and the operating status of fan 52 is adjusted via an external controller. The temperature sensor monitors temperature changes inside cabinet 1 in real time to ensure that the temperature remains within a safe range. The temperature sensor can detect the temperature at multiple points to ensure comprehensive coverage of the main heat-generating areas. The external controller is connected to the temperature sensor and fan 52 to receive data from the temperature sensor and adjust the operating status of fan 52 according to the set parameters. The controller can set different temperature thresholds and fan operating modes to achieve intelligent control. When the temperature exceeds the preset threshold, the controller can automatically start fan 52 for timely heat dissipation; when the temperature returns to normal, the fan can automatically shut down to save energy.

[0045] In space-constrained environments, such as power distribution rooms and data centers, multiple switchgear cabinets are typically installed side-by-side to improve space utilization. Without special design, the air intake vent 11 of one switchgear cabinet may be blocked by the other, resulting in poor airflow and affecting heat dissipation. In this device, the side wall of the cabinet 1 is provided with a groove 12, and multiple air intake vents 11 are located within the groove 12. The groove 12 causes the air intake vents 11 to be recessed inward. When two cabinets 1 are installed side-by-side, the air intake vent 11 of one cabinet 1 is prevented from being blocked by the other cabinet 1, thus ensuring good ventilation and heat dissipation. In this way, even if multiple cabinets 1 are arranged closely together, the temperature of the internal electrical components can be effectively maintained within a safe range, ensuring stable operation of the equipment.

[0046] As a preferred embodiment of the above, each support plate 2 and drawer-type functional unit 3 is provided with multiple ventilation holes 21; by increasing the airflow path through the ventilation holes 21, the enhanced internal ventilation ensures that cold air can evenly cover each functional unit, thereby further accelerating the dissipation of heat.

[0047] This utility model discloses a low-voltage withdrawable switchgear. During operation, a temperature sensor inside the cabinet 1 monitors the temperature changes inside the cabinet 1 in real time and adjusts the working status of the fan 52 through an external controller. When the temperature sensor detects that the temperature exceeds a preset threshold, the controller automatically starts the fan 52 or increases the fan speed to enhance heat dissipation. External cold air enters the cabinet through multiple air inlets 11 set in the groove 12 on the side wall of the cabinet 1. The dustproof screens set in the air inlets 11 filter out dust and impurities in the external air to ensure that the air entering the cabinet 1 is clean. The cold air entering the cabinet 1 is further diffused through multiple ventilation holes 21 on the support plate 2 and the drawer-type functional unit 3. The fan 52 generates negative pressure, attracting hot air through the suction hole 42 into the guide roller 4, and then through the suction hood 51 to the duct 53, and then out of the cabinet 1 through the duct 53. The dustproof screen set in the guide roller 4 prevents dust from entering the fan 52. When the temperature returns to normal, the controller automatically shuts off the fan 52 or reduces the fan speed to save energy.

[0048] The low-voltage withdrawable switchgear of this utility model can be installed, connected, or set up using common mechanical methods. Any method that can achieve its beneficial effects can be implemented.

[0049] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A low-voltage withdrawable switchgear, characterized in that, include: The cabinet (1) is independently fixed and has an installation area inside. Multiple air inlets (11) are connected on both sides of the cabinet (1). Multiple support plates (2) are provided and installed in the installation area, and the installation area is divided into multiple drawer accommodating cavities; Multiple drawer-type functional units (3) are provided, all of which are slidably installed in the drawer receiving cavity; Multiple guide rollers (4) are installed at the bottom of each of the bearing plates (2). A cavity (41) is opened inside the guide roller (4), and multiple air suction holes (42) connected to the cavity (41) are opened on the guide roller (4). The air guide mechanism (5) is connected to the guide roller (4) and is used to transport the heat generated by the drawer-type functional unit (3) installed in the corresponding drawer accommodating cavity to the outside.

2. The low-voltage withdrawable switchgear as described in claim 1, characterized in that, Multiple guide rollers (4) are spaced apart along the length of the support plate (2), and the length of the guide rollers (4) corresponds to the drawer receiving cavity.

3. The low-voltage withdrawable switchgear as described in claim 1, characterized in that, The suction holes (42) are arranged in multiple rows along the central axis of the guide roller (4), and each row includes multiple suction holes (42) arranged at intervals.

4. The low-voltage withdrawable switchgear as described in claim 1, characterized in that, The air guiding mechanism (5) includes: A suction hood (51) is installed on one side of the guide roller (4) and is connected to the guide roller (4); A fan (52) is installed inside the suction hood (51); The conduit (53) is connected to the suction hood (51), and one end of the conduit (53) passes through the cabinet (1) and extends to the outside.

5. The low-voltage withdrawable switchgear as described in claim 4, characterized in that, The outer wall of the cabinet (1) is provided with a channel for the conduit (53) to pass through, and a guide sleeve that cooperates with the conduit (53) is embedded in the channel.

6. The low-voltage withdrawable switchgear as described in claim 5, characterized in that, The air inlet (11) and the channel are located at the front and rear of the cabinet (1), respectively.

7. The low-voltage withdrawable switchgear as described in claim 3, characterized in that, Dustproof nets are provided inside the air inlet (11) and on the side of the guide roller (4) near the fan (52).

8. The low-voltage withdrawable switchgear as described in claim 3, characterized in that, A temperature sensor is also installed inside the cabinet (1). The temperature sensor is electrically connected to the fan (52) and the working status of the fan (52) is adjusted by an external controller.

9. The low-voltage withdrawable switchgear as described in claim 1, characterized in that, The cabinet (1) has a groove (12) on its side wall, and a plurality of air inlets (11) are provided in the groove (12).

10. The low-voltage withdrawable switchgear as described in claim 1, characterized in that, Each of the support plate (2) and the drawer-type functional unit (3) is provided with multiple ventilation holes (21).

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