Low-voltage draw-out type complete switch cabinet

Abstract

The invention relates to the technical field of electrical complete equipment, and discloses a low-voltage draw-out type complete switch cabinet which comprises a cabinet body, a cabinet door is assembled on the cabinet body, a drawer is slidably connected in the cabinet body, an electrical module is assembled in the drawer, and a controller is fixedly connected to one side, away from the cabinet door, of the cabinet body. A dismounting assembly is arranged between the cabinet body and the drawer, an automatic heat dissipation assembly is arranged in the cabinet body, a cleaning assembly is arranged on the outer wall of the cabinet body, a silo is fixedly connected to the top of the cabinet body, a guide frame is fixedly connected to the interior of the silo, electric push rods are symmetrically assembled on the outer side of the silo, and a storage bin is fixedly connected to the top of the cabinet body. And the output end of the electric push rod is fixedly connected with a sealing plate. Through structural cooperation of the silo, the electric push rod, the sealing plate, the smoke sensor and the like, autonomous fire extinguishing is realized, the damage risk of electrical components is effectively reduced, and the operation safety and reliability of the switch cabinet are improved.

Description

Technical Field

[0001] This invention relates to the field of electrical complete equipment technology, and in particular to a low-voltage withdrawable complete switchgear. Background Technology

[0002] Low-voltage withdrawable switchgear is an electrical device used in low-voltage power distribution systems to receive, distribute, control, and protect electrical energy. It typically adopts a modular design, integrating multiple functional units into the cabinet to achieve centralized management of the circuit. It is widely used in power supply and distribution systems in industrial, commercial, and residential applications.

[0003] Currently, low-voltage withdrawable switchgear mainly consists of a cabinet frame, drawer units, busbar system, and functional units. Power is distributed to the functional circuits in the drawer units via the busbar system. By controlling the electrical components in the functional units, power is supplied to the load equipment and protection is provided. When a circuit fails, the corresponding drawer unit can be withdrawn for maintenance without affecting the normal operation of other circuits.

[0004] However, with the increasing demands for reliability, safety, and intelligence in power systems, existing low-voltage withdrawable switchgear has become inadequate. Firstly, existing switchgear generally lacks autonomous fire suppression capabilities. This is mainly because current technology relies on external fire-fighting facilities or manual detection of fires before taking action. However, this approach has a significant time lag. If a fire is not effectively controlled in its early stages, it can severely damage electrical components within the switchgear, causing power outages and spreading to surrounding equipment and buildings, leading to larger-scale safety accidents and incalculable economic losses and safety risks. Secondly, the electrical components within the switchgear continuously generate heat during operation. Existing natural convection or simple forced ventilation methods are insufficient to meet the heat dissipation requirements during high-power operation, easily causing performance degradation, shortened lifespan, and even safety accidents. Summary of the Invention

[0005] The purpose of this invention is to provide a low-voltage withdrawable switchgear that solves the problems of existing switchgear lacking self-extinguishing function, insufficient heat dissipation efficiency, easy dust accumulation in the cabinet affecting operation, and inconvenient disassembly and assembly of drawers.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A low-voltage withdrawable switchgear includes a cabinet body with a door. A drawer is slidably connected inside the cabinet body, and an electrical module is installed inside the drawer. A controller is fixedly connected to the side of the cabinet body away from the door. A disassembly assembly is provided between the cabinet body and the drawer. An automatic heat dissipation assembly is installed inside the cabinet body. A cleaning assembly is installed on the outer wall of the cabinet body. A silo is fixedly connected to the top of the cabinet body. A guide frame is fixedly connected inside the silo. Electric actuators are symmetrically mounted on the outer side of the silo. A sealing plate is fixedly connected to the output end of the electric actuator. A smoke sensor is fixedly connected to the inner wall of the cabinet body. A powder filling port is installed on the top of the silo. Preferably, the disassembly assembly includes a protrusion, which is symmetrically and fixedly connected inside the cabinet. The bottom of the protrusion has a slot. The bottom of the drawer is fixedly connected to a connecting block. The end of the connecting block away from the drawer is rotatably connected to a pressure block. The top of the pressure block is fixedly connected to a locking block.

[0007] Preferably, the automatic heat dissipation component includes a fan installed inside the cabinet. A heat dissipation block is fixedly connected to the side of the cabinet away from the fan. Heat dissipation fins are installed on the side of the heat dissipation block away from the fan. A conduit is fixedly connected between the heat dissipation block and the heat dissipation fins. Temperature sensors are uniformly installed inside the cabinet.

[0008] Preferably, the cleaning component includes a dustproof frame, which is fixedly connected to the outer wall of the cabinet. The dustproof frame has filter holes evenly distributed inside. A sliding cover is slidably connected to the side of the dustproof frame away from the cabinet, and a cleaning head is fixedly connected to the sliding cover.

[0009] Preferably, the guide frame is located directly below the silo, and the sealing plate is slidably connected inside the guide frame.

[0010] Preferably, both the electric actuator and the smoke sensor are electrically connected to the controller.

[0011] Preferably, a spring is installed between the drawer and the pressure block, and the locking block engages with the locking slot.

[0012] Preferably, the drawer is slidably connected to the side of the protrusion closest to the electrical module.

[0013] Preferably, the output end of the fan is adapted to the position of the cleaning component, the output end of the fan is adapted to the position of the heat sink, and both the fan and the temperature sensor are electrically connected to the controller.

[0014] Preferably, a handle is fixedly connected to the side of the sliding cover away from the dustproof frame.

[0015] In summary, the present invention has at least one of the following beneficial technical effects: 1. This invention utilizes a silo, electric actuator, sealing plate, and smoke sensor on the inner wall of the cabinet. When the smoke sensor detects smoke inside the cabinet, the controller activates the electric actuator, causing the sealing plate to slide open. The extinguishing powder in the silo automatically falls to cover the fire source, achieving autonomous fire extinguishing. Compared to traditional methods that rely on external fire-fighting facilities or manual handling, this structure can significantly shorten the fire response time, control the fire in its early stages, effectively reduce the risk of damage to electrical components, avoid greater losses caused by power outages and fire spread, and help improve the safety and reliability of switchgear operation.

[0016] 2. This invention utilizes a disassembly component between the cabinet and the drawer. When the electrical module inside the drawer needs to be inspected, pressing the pressure block upwards causes the spring to deform, disengaging the locking block from the slot, allowing the drawer to be easily pulled out. During installation, the drawer is pushed into the designated position, the pressure block is released, and the spring returns to its original position, causing the locking block to insert into the slot for a secure connection. This design makes the disassembly and installation of the drawer simple and convenient, requiring no complex tools, and facilitating quick and easy inspection or replacement of faulty modules, effectively shortening equipment maintenance time and improving equipment maintainability.

[0017] 3. This invention utilizes an automatic heat dissipation assembly consisting of a temperature sensor, fan, heat sink, duct, and heat dissipation fins inside the cabinet. The temperature sensor monitors the ambient temperature in real time. When the temperature exceeds a threshold, the controller activates the fan. The airflow is guided by the heat sink, accelerated by the duct, and then contacts the heat dissipation fins, enhancing the heat dissipation effect. Compared to natural convection or simple forced ventilation, this active heat dissipation method can more efficiently meet the heat dissipation needs during high-power operation, prevent electrical components from degrading in performance or shortening their lifespan due to overheating, ensure the stable operation of the equipment, and reduce the possibility of safety accidents caused by overheating.

[0018] 4. This invention uses a cleaning assembly consisting of a dustproof frame, a sliding cover, and a cleaning head on the outside of the cabinet. The airflow generated by the fan drives the air inside the dustproof frame to circulate, causing dust to adhere to the inner wall of the dustproof frame. The operator can then slide the cleaning head by sliding the cover to clean and collect the dust. This structure effectively prevents dust accumulation from affecting the heat dissipation of the cabinet and the normal operation of electrical components. At the same time, the convenient cleaning method reduces the frequency and difficulty of manual maintenance and improves the maintenance efficiency of the equipment. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a schematic diagram of the controller of the present invention; Figure 3 This is a schematic diagram of the temperature sensor of the present invention; Figure 4 This is a schematic diagram of the sealing plate of the present invention; Figure 5 This is a schematic diagram of the protrusion of the present invention; Figure 6 This is a schematic diagram of the disassembly components of the present invention; Figure 7 for Figure 6 Enlarged view of A in the middle; Figure 8 This is a schematic diagram of the cleaning component of the present invention.

[0020] The components include: 1. Cabinet body; 2. Cabinet door; 3. Drawer; 4. Electrical module; 5. Disassembly assembly; 51. Protrusion; 52. Slot; 53. Connecting block; 54. Pressing block; 55. Locking block; 56. Spring; 6. Automatic heat dissipation assembly; 61. Fan; 62. Heat sink; 63. Pipe; 64. Heat dissipation fins; 65. Temperature sensor; 7. Cleaning assembly; 71. Dustproof frame; 72. Filter hole; 73. Sliding cover; 74. Cleaning head; 75. Handle; 8. Controller; 9. Silo; 10. Guide frame; 11. Electric push rod; 12. Sealing plate; 13. Powder filling port; 14. Smoke sensor. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see the appendix Figure 1 - Appendix Figure 4 This invention provides a low-voltage withdrawable switchgear, comprising a cabinet 1, a cabinet door 2 mounted on the cabinet 1, a drawer 3 slidably connected inside the cabinet 1, an electrical module 4 mounted inside the drawer 3, a controller 8 fixedly connected to the side of the cabinet 1 away from the cabinet door 2, a disassembly assembly 5 provided between the cabinet 1 and the drawer 3, an automatic heat dissipation assembly 6 provided inside the cabinet 1, a cleaning assembly 7 provided on the outer wall of the cabinet 1, a silo 9 fixedly connected to the top of the cabinet 1, a guide frame 10 fixedly connected inside the silo 9, electric push rods 11 symmetrically mounted on the outer side of the silo 9, a sealing plate 12 fixedly connected to the output end of the electric push rods 11, a smoke sensor 14 fixedly connected to the inner wall of the cabinet 1, a powder filling port 13 installed on the top of the silo 9, the guide frame 10 located directly below the silo 9, the sealing plate 12 slidably connected inside the guide frame 10, and both the electric push rods 11 and the smoke sensor 14 being electrically connected to the controller 8.

[0023] Specifically, the intelligent fire extinguishing system is formed by the integrated silo 9, powder filling port 13, electric actuator 11, sealing plate 12, guide frame 10 on the top of the cabinet 1, and the smoke sensor 14 installed on the inner wall, together with the controller 8. The silo 9 serves as a dedicated storage unit, and the extinguishing powder can be conveniently replenished through the powder filling port 13 to ensure sufficient agent reserves. When the smoke sensor 14 detects smoke signals inside the cabinet 1 in real time, it immediately transmits the data to the controller 8. The controller 8 quickly activates the electric actuator 11, driving the sealing plate 12 to slide precisely open along the guide frame 10. The extinguishing powder in the silo 9 falls vertically under the action of gravity, quickly and evenly covering the fire source area. The guiding effect of the guide frame 10 on the sealing plate 12 ensures the stability of the opening action, avoids powder leakage or spray deviation, and ensures fire extinguishing efficiency. This design realizes fully automated closed-loop control of fire from monitoring, response to disposal, significantly shortening the response time, quickly suppressing the fire in the bud stage, reducing the probability of damage to electrical components, avoiding power system paralysis and damage to surrounding facilities, and improving the safety and reliability of the switchgear.

[0024] Please see the appendix Figure 5 - Appendix Figure 7 The disassembly component 5 includes a protrusion 51, which is symmetrically fixedly connected inside the cabinet 1. The bottom of the protrusion 51 has a slot 52. The bottom of the drawer 3 is fixedly connected to a connecting block 53. The end of the connecting block 53 away from the drawer 3 is rotatably connected to a pressure block 54. The top of the pressure block 54 is fixedly connected to a locking block 55. A spring piece 56 is installed between the drawer 3 and the pressure block 54. The locking block 55 engages with the slot 52. The drawer 3 is slidably connected to the side of the protrusion 51 near the electrical module 4.

[0025] Specifically, when drawer 3 needs to be pulled out, press the pressure block 54 upwards. The spring piece 56 is subjected to force and undergoes elastic deformation, which drives the locking block 55 to disengage from the slot 52 at the bottom of the protrusion 51, releasing the mechanical lock and allowing drawer 3 to be pulled out smoothly. When drawer 3 is pushed into cabinet 1 to the designated position, release the pressure block 54. The spring piece 56 recovers its deformation due to its own elasticity, pushing the pressure block 54 back to its original position. The locking block 55 then accurately embeds into the slot 52, forming a stable connection structure. This design simplifies the disassembly and installation process of drawer 3, and can be completed quickly without the need for additional tools, which helps to reduce the time for maintenance or replacement of electrical module 4.

[0026] Please see the appendix Figure 8The automatic heat dissipation component 6 includes a fan 61, which is installed inside the cabinet 1. A heat sink 62 is fixedly connected to the side of the cabinet 1 away from the fan 61. Heat sink fins 64 are installed on the side of the heat sink 62 away from the fan 61. A conduit 63 is fixedly connected between the heat sink 62 and the heat sink fins 64. Temperature sensors 65 are evenly installed inside the cabinet 1. The output end of the fan 61 is adapted to the position of the cleaning component 7 and the position of the heat sink 62. Both the fan 61 and the temperature sensors 65 are electrically connected to the controller 8.

[0027] Specifically, the temperature sensor 65 continuously monitors the internal ambient temperature of the cabinet 1. Once the detected value exceeds the preset threshold, the signal is quickly transmitted to the controller 8, which then starts the fan 61. The generated airflow is scientifically guided by the heat sink 62, accelerated by the duct 63, and then makes full contact with the large-area heat sink fins 64 at a high flow rate, significantly enhancing the heat exchange efficiency. This system precisely controls the airflow direction and speed, avoiding the problems of airflow turbulence and uneven heat dissipation in traditional heat dissipation methods. This design realizes the integrated operation of temperature monitoring, intelligent control, and efficient heat dissipation. Compared with natural convection or simple forced ventilation, it can quickly reduce the internal temperature of the cabinet 1 when operating at high power, effectively preventing the performance of electrical components from deteriorating or their lifespan from being shortened due to overheating, and reducing the risk of safety accidents caused by high temperature.

[0028] Please see the appendix Figure 3 and attached Figure 8 The cleaning component 7 includes a dustproof frame 71, which is fixedly connected to the outer wall of the cabinet 1. The dustproof frame 71 has filter holes 72 evenly distributed inside. A sliding cover 73 is slidably connected to the side of the dustproof frame 71 away from the cabinet 1. A cleaning head 74 is fixedly connected to the sliding cover 73. A handle 75 is fixedly connected to the side of the sliding cover 73 away from the dustproof frame 71.

[0029] Specifically, the dustproof frame 71 is fixed to the outer wall of the cabinet 1. The evenly distributed filter holes 72 inside the frame can effectively intercept external dust. The sliding cover 73, with its sliding connection design with the dustproof frame 71, can flexibly drive the cleaning head 74 fixed on it to move back and forth along the internal trajectory of the dustproof frame 71. When cleaning is required, the operator applies force by holding the handle 75 on one side of the sliding cover 73 and sliding it. The cleaning head 74 simultaneously fits against the inner wall of the dustproof frame 71 and the edge of the filter holes 72, and concentrates and collects the attached dust. This structure effectively avoids the long-term accumulation of dust that will cause the filter holes 72 to become blocked, maintains good ventilation and heat dissipation conditions for the cabinet 1, and prevents electrical components from short-circuiting and other malfunctions caused by dust intrusion. At the same time, compared with the traditional manual disassembly and cleaning method, it helps to reduce the difficulty and time cost of maintenance operations.

[0030] Working principle: The silo 9 on the cabinet 1 is used to store fire extinguishing powder. The fire extinguishing powder is replenished through the powder filling port 13. When the smoke sensor 14 inside the cabinet 1 detects a smoke signal, it will transmit the signal to the controller 8. The controller 8 will then activate the electric actuator 11. The electric actuator 11 pulls the sealing plate 12 to slide open in the guide frame 10. The fire extinguishing powder in the silo 9 falls and covers the fire source inside the cabinet 1 to extinguish the fire. The temperature sensor 65 inside the cabinet 1 monitors the ambient temperature in real time. When the temperature exceeds the set threshold, the temperature signal is transmitted to the controller 8. The controller 8 controls the fan 61 to start. The airflow generated by the fan 61 is guided by the heat sink 62. After the airflow is accelerated through the duct 63, it comes into contact with the heat sink fins 64 to enhance the heat dissipation effect. At the same time, the airflow generated by the fan 61 will also push the airflow inside the dustproof frame 71, causing dust to adhere to the inner wall of the dustproof frame 71. The cleaning head 74 is driven by the sliding cover 73 to slide inside the dustproof frame 71, which can clean the dust and keep the filter hole 72 outside the cabinet 1 clean. When drawer 3 needs to be pulled out, press the pressure block 54 upwards. The spring piece 56 is squeezed and deformed, causing the locking block 55 to disengage from the slot 52 at the bottom of the protrusion 51. At this time, drawer 3 can be pulled out. When drawer 3 is pushed into the designated position, release the pressure block 54. The spring piece 56 returns to its elastic deformation, causing the pressure block 54 to reset. The locking block 55 then inserts into the slot 52, ensuring that drawer 3 is securely connected to the cabinet 1, which facilitates the installation or maintenance of the electrical module 4 inside drawer 3.

[0031] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-voltage withdrawable switchgear, comprising a cabinet (1), characterized in that, The cabinet (1) is equipped with a cabinet door (2), and a drawer (3) is slidably connected inside the cabinet (1). An electrical module (4) is installed inside the drawer (3). A controller (8) is fixedly connected to the side of the cabinet (1) away from the cabinet door (2). A disassembly assembly (5) is provided between the cabinet (1) and the drawer (3). An automatic heat dissipation assembly (6) is provided inside the cabinet (1). A cleaning assembly (7) is provided on the outer wall of the cabinet (1). A silo (9) is fixedly connected to the top of the cabinet (1). A guide frame (10) is fixedly connected inside the silo (9). Electric push rods (11) are symmetrically mounted on the outer side of the silo (9). A sealing plate (12) is fixedly connected to the output end of the electric push rod (11). A smoke sensor (14) is fixedly connected to the inner wall of the cabinet (1). A powder filling port (13) is installed on the top of the silo (9).

2. The low-voltage withdrawable switchgear according to claim 1, characterized in that, The disassembly assembly (5) includes a protrusion (51), which is symmetrically fixedly connected to the inside of the cabinet (1). The bottom of the protrusion (51) is provided with a slot (52). The bottom of the drawer (3) is fixedly connected with a connecting block (53). The end of the connecting block (53) away from the drawer (3) is rotatably connected with a pressure block (54). The top of the pressure block (54) is fixedly connected with a locking block (55).

3. A low-voltage withdrawable switchgear according to claim 1, characterized in that, The automatic heat dissipation component (6) includes a fan (61), which is installed inside the cabinet (1). A heat sink (62) is fixedly connected to the side of the cabinet (1) away from the fan (61). A heat sink fin (64) is installed on the side of the heat sink (62) away from the fan (61). A conduit (63) is fixedly connected between the heat sink (62) and the heat sink fin (64). Temperature sensors (65) are evenly installed inside the cabinet (1).

4. A low-voltage withdrawable switchgear according to claim 1, characterized in that, The cleaning component (7) includes a dustproof frame (71), which is fixedly connected to the outer wall of the cabinet (1). The dustproof frame (71) has filter holes (72) evenly distributed inside. A sliding cover (73) is slidably connected to the side of the dustproof frame (71) away from the cabinet (1). A cleaning head (74) is fixedly connected to the sliding cover (73).

5. A low-voltage withdrawable switchgear according to claim 1, characterized in that, The guide frame (10) is located directly below the silo (9), and the sealing plate (12) is slidably connected inside the guide frame (10).

6. A low-voltage withdrawable switchgear according to claim 1, characterized in that, The electric actuator (11) and the smoke sensor (14) are both electrically connected to the controller (8).

7. A low-voltage withdrawable switchgear according to claim 2, characterized in that, A spring clip (56) is installed between the drawer (3) and the pressure block (54), and the locking block (55) is engaged with the locking groove (52).

8. A low-voltage withdrawable switchgear according to claim 2, characterized in that, The drawer (3) is slidably connected to the side of the protrusion (51) near the electrical module (4).

9. A low-voltage withdrawable switchgear according to claim 3, characterized in that, The output end of the fan (61) is adapted to the position of the cleaning component (7), the output end of the fan (61) is adapted to the position of the heat sink (62), and the fan (61) and the temperature sensor (65) are both electrically connected to the controller (8).

10. A low-voltage withdrawable switchgear according to claim 4, characterized in that, A handle (75) is fixedly connected to the side of the sliding cover (73) away from the dustproof frame (71).

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