Protective device for low-voltage switchgear assembly

Abstract

The utility model discloses a protective device for a low-voltage switchgear assembly, and relates to the technical field of switch cabinet protection. The low-voltage switch cabinet comprises a low-voltage switch cabinet body and a heat dissipation shell, a ventilation opening is formed in the rear side of the low-voltage switch cabinet body, the heat dissipation shell is fixedly installed at the ventilation opening, a heat dissipation fan is arranged in the heat dissipation shell, and a dustproof net is fixedly installed in the heat dissipation shell. The adsorption part of the connecting assembly pulls the connecting part to slide along the surface of the pushing part until the connecting part is in contact with the rotating end of the cooling fan, so that the rotating end of the cooling fan rotates and drives the transmission sleeve to rotate along with the rotating end, and kinetic energy of the cooling fan is utilized to drive the transmission sleeve and the reciprocating lead screw to rotate; the dust sweeping brush is driven by the transmission sleeve to rotate, extra driving equipment for driving the dust sweeping brush to rotate is avoided, resource consumption is reduced, the effect of regularly and automatically cleaning the dust screen is achieved, the labor intensity of workers is reduced, and the dust sweeping brush sweeps and cleans dust on the dust screen by driving the dust sweeping brush to rotate through the transmission sleeve.

Description

Technical Field

[0001] This utility model relates to the field of switchgear protection technology, specifically to a protection device for low-voltage switchgear. Background Technology

[0002] Low-voltage switchgear is a device used for circuit control and protection in low-voltage power systems. It is widely used in various industrial and commercial fields. Its main function is to protect electrical equipment and ensure the safe operation of electrical systems. It contains components such as circuit breakers, contactors, and fuses to cut off circuits and provide overload and short-circuit protection.

[0003] The existing low-voltage switchgear is equipped with cooling fans on the outer wall to dissipate heat from the equipment inside the cabinet and prevent overheating. Dust screens are installed at the ventilation openings of the switchgear to prevent dust and small insects from entering the cabinet and affecting the normal operation of the equipment. However, due to long-term operation, dust and other debris will clog the dust screens at the ventilation and heat dissipation points, reducing the flow efficiency and requiring staff to clean them regularly, which is very inconvenient. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a protective device for low-voltage switchgear, which solves the problem of dust filters being clogged by dust, thus affecting heat dissipation efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a protective device for low-voltage switchgear, comprising a low-voltage switch cabinet and a heat dissipation shell, wherein a ventilation opening is provided on the rear side of the low-voltage switch cabinet, and a heat dissipation shell is fixedly installed at the ventilation opening, a heat dissipation fan is provided inside the heat dissipation shell, a dustproof net is fixedly installed inside the heat dissipation shell, and the heat dissipation fan is located behind the dustproof net.

[0006] A drain plate is slidably installed inside the heat dissipation shell, and a reciprocating screw is rotatably installed inside the heat dissipation shell. The drain plate and the reciprocating screw are threadedly connected. One end of the reciprocating screw passes through the dustproof net and is fixedly connected to a transmission sleeve. A dust sweeping brush is fixedly installed on the surface of the transmission sleeve, and the dust sweeping brush is in contact with the rear side of the dustproof net.

[0007] The transmission sleeve is internally provided with a connecting assembly, which consists of a pusher, a connector, and an adsorption component. The connector is slidably mounted on the surface of the pusher. The adsorption end of the adsorption component is located inside the transmission sleeve, and the adsorbed end of the adsorption component is fixedly mounted on the connector. The rotating end of the cooling fan extends into the transmission sleeve and is correspondingly arranged with the connector of the connecting assembly.

[0008] The heat dissipation housing includes a limiting box, a heat dissipation cylinder, and a protective railing. The limiting box is fixedly installed on the rear side of the low-voltage switchgear. The air inlet on the front side of the limiting box is connected to the rear ventilation opening of the low-voltage switchgear. The heat dissipation cylinder is fixedly installed on the rear side of the limiting box, and the protective railing is fixedly installed on the rear side of the heat dissipation cylinder.

[0009] A guide rod is fixedly installed inside the limiting box, and the guide rod is slidably inserted into the unblocking plate. A reciprocating screw is rotatably installed inside the limiting box.

[0010] The bottom of the heat dissipation cylinder is provided with a chip removal groove, a dustproof net is fixedly installed on the front side of the heat dissipation cylinder, and a heat dissipation fan is set on the surface of the guardrail.

[0011] The cooling fan includes a motor, a shaft, and fan blades. The motor is fixedly installed on the rear side of the cooling housing. The output end of the motor is fixedly installed with a shaft. The front end of the shaft is located inside the transmission sleeve and is fixedly installed with a baffle plate. The output end of the motor is fixedly installed with fan blades.

[0012] The surface of the unblocking plate is provided with multiple sets of protruding inserts, and the protruding inserts are arranged in a corresponding manner to the holes of the dustproof net.

[0013] The pusher of the connecting assembly includes a slide rod and a spring. The slide rod is fixedly installed on the front inner wall of the transmission sleeve, and the spring is fixedly installed on the front inner wall of the transmission sleeve and sleeved on the surface of the slide rod.

[0014] The connecting component of the connecting assembly includes a push plate and a connecting baffle. The push plate is slidably mounted on the surface of the slide rod, and the free end of the spring is connected to the push plate. The connecting baffle is fixedly installed on the rear side of the push plate, and an L-shaped plate is fixedly installed on the front side of the push plate.

[0015] The adsorption component of the connecting assembly includes an electromagnet and an adsorption block. The electromagnet is fixedly installed inside the transmission sleeve, and the adsorption block is fixedly installed on the surface of the L-shaped plate, with the adsorption block and the electromagnet being arranged in a corresponding manner.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention uses an adsorption component of the connecting assembly to pull the connecting component along the surface of the pusher until the connecting component contacts the rotating end of the cooling fan. This causes the rotating end of the cooling fan to rotate, simultaneously driving the transmission sleeve to rotate. The kinetic energy of the cooling fan drives the transmission sleeve and the reciprocating screw to rotate, eliminating the need for additional drive equipment, reducing resource consumption, and achieving regular automatic cleaning of the dust screen. This reduces the labor intensity of workers. The transmission sleeve drives the dust brush to rotate, allowing it to sweep away the dust adhering to and accumulated on the back of the dust screen. The reciprocating screw rotates, causing the unblocking plate to slide back and forth along its surface, allowing the unblocking plate to push out blockages in the holes of the dust screen, preventing a reduction in the flow efficiency of the dust screen. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional sectional view of the present invention;

[0020] Figure 3 This is a partial side sectional view of the present invention;

[0021] Figure 4 This is a second partial side sectional view of the present invention;

[0022] Figure 5 This is a schematic cross-sectional view of the third part of this utility model.

[0023] Reference numerals in the attached drawings: 1. Low-voltage switchgear; 2. Heat dissipation housing; 201. Limiting box; 202. Heat dissipation cylinder; 203. Guardrail; 3. Cooling fan; 301. Motor; 302. Shaft; 303. Fan blade; 4. Dustproof net; 5. Unblocking plate; 6. Reciprocating screw; 7. Transmission sleeve; 8. Dust sweeping brush; 9. Connecting assembly; 901. Slide rod; 902. Spring; 903. Push plate; 904. Electromagnet; 905. Adsorption block; 906. Connecting baffle. Detailed Implementation

[0024] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0025] Figures 1-5 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figure 1 -Appendix Figure 5 The present invention will be further described below.

[0026] A protective device for low-voltage switchgear includes a low-voltage switch cabinet 1 and a heat dissipation housing 2. A ventilation opening is provided on the rear side of the low-voltage switch cabinet 1, and the heat dissipation housing 2 is fixedly installed at the ventilation opening. A cooling fan 3 is installed inside the heat dissipation housing 2. Two sets of cooling fans 3 are arranged along the height direction, and the two sets of cooling fans 3 blow air in opposite directions. A dustproof net 4 is fixedly installed inside the heat dissipation housing 2, with the cooling fans 3 located outside the dustproof net 4. A drain plate 5 is slidably installed inside the heat dissipation housing 2, and a reciprocating screw 6 is rotatably installed inside the heat dissipation housing 2. The drain plate 5 and the reciprocating screw 6 are... The reciprocating screw 6 is threaded and has one end passing through the dustproof mesh 4 and fixedly connected to the transmission sleeve 7. A dust-sweeping brush 8 is fixedly installed on the surface of the transmission sleeve 7 and is in contact with the rear side of the dustproof mesh 4. A connecting component 9 is provided inside the transmission sleeve 7. The connecting component 9 consists of a pusher, a connector, and an adsorption component. The connector is slidably installed on the surface of the pusher. The adsorption end of the adsorption component is located inside the transmission sleeve 7. The adsorbed end of the adsorption component is fixedly installed on the connector. The rotating end of the cooling fan 3 extends into the transmission sleeve 7 and is correspondingly set with the connector of the connecting component 9.

[0027] Specifically, two sets of cooling fans 3 drive airflow. One set blows air into the low-voltage switchgear 1, while the other set extracts air from the low-voltage switchgear 1, allowing the airflow to circulate within the low-voltage switchgear 1 and carry away heat to achieve heat dissipation. A dust filter 4 filters the flowing air to prevent dust and small insects from entering the low-voltage switchgear 1. A cleaning plate 5 clears blockages from the holes in the dust filter 4. The rotation of the reciprocating screw 6 causes the cleaning plate 5 to move back and forth. The rotation of the transmission sleeve 7 causes the dust brush 8 to sweep the back of the dust filter 4. The connecting assembly 9 is connected to the rotation of the cooling fans 3, causing the rotation of the cooling fans 3 to drive the rotation of the transmission sleeve 7 and the reciprocating screw 6.

[0028] Alternatively, only one cooling fan 3 can be installed. However, installing two cooling fans 3 can further increase the airflow rate inside the low-voltage switchgear 1 and also achieve forced air circulation, ensuring better cooling effect.

[0029] The heat dissipation housing 2 includes a limiting box 201, a heat dissipation cylinder 202, and a protective railing 203. The limiting box 201 is fixedly installed on the rear side of the low-voltage switchgear 1. The air inlet on the front side of the limiting box 201 is connected to the rear ventilation opening of the low-voltage switchgear 1. The heat dissipation cylinder 202 is fixedly installed on the rear side of the limiting box 201, and the protective railing 203 is fixedly installed on the rear side of the heat dissipation cylinder 202.

[0030] Specifically, the movement range of the drainage plate 5 is limited by the limiting box 201, the airflow is restricted by the heat dissipation cylinder 202, the gas is filtered and removed by passing through the dustproof net 4, and the rotating end of the cooling fan 3 is protected by the protective railing 203.

[0031] A guide rod is fixedly installed inside the limiting box 201, and the guide rod is slidably inserted into the unblocking plate 5. The reciprocating screw 6 is rotatably installed inside the limiting box 201. A chip removal groove is opened at the bottom of the heat dissipation cylinder 202. The dustproof net 4 is fixedly installed on the front side of the heat dissipation cylinder 202, and the heat dissipation fan 3 is set on the surface of the guardrail 203.

[0032] Specifically, the guide rod of the limiting box 201 guides the unblocking plate 5 to slide, so that the unblocking plate 5 is driven by the reciprocating screw 6 to move back and forth, and the dust and debris swept off the dust screen 4 are discharged through the chip discharge groove.

[0033] The cooling fan 3 includes a motor 301, a shaft 302, and fan blades 303. The motor 301 is fixedly installed on the surface of the guardrail 203. The output end of the motor 301 is fixedly installed with the shaft 302. The front end of the shaft 302 is located inside the transmission sleeve 7 and is fixedly installed with a baffle plate. The baffle plate is correspondingly set with the connector of the connecting component 9. The output end of the motor 301 is fixedly installed with fan blades 303.

[0034] Specifically, the fan blades 303 are rotated by the motor 301 to control the air flow and heat the low-voltage switch cabinet 1. The rotating shaft 302 is rotated by the motor 301. When the lever of the rotating shaft 302 contacts the connector of the connecting component 9, the transmission sleeve 7 is rotated accordingly.

[0035] The surface of the unblocking plate 5 is provided with multiple sets of protruding inserts, and the protruding inserts are arranged in a corresponding manner with the holes of the dustproof net 4.

[0036] Specifically, the protruding rod of the unblocking plate 5 passes through the holes of the dustproof net 4 to unblock the dustproof net 4.

[0037] The pushing component of the connecting assembly 9 includes a slide rod 901 and a spring 902. The slide rod 901 is fixedly installed on the inner front wall of the transmission sleeve 7, and the spring 902 is fixedly installed on the inner front wall of the transmission sleeve 7 and sleeved on the surface of the slide rod 901. The connecting component of the connecting assembly 9 includes a push plate 903 and a connecting baffle 906. The push plate 903 is slidably sleeved on the surface of the slide rod 901, and the free end of the spring 902 is connected to the push plate 903. The connecting baffle 906 is fixedly installed on the rear side of the push plate 903. The connecting baffle 906 is correspondingly arranged with the lever plate of the rotating shaft 302. An L-shaped plate is fixedly installed on the front side of the push plate 903. The adsorption component of the connecting assembly 9 includes an electromagnet 904 and an adsorption block 905. The electromagnet 904 is fixedly installed inside the transmission sleeve 7, and the adsorption block 905 is fixedly installed on the surface of the L-shaped plate. The adsorption block 905 is correspondingly arranged with the electromagnet 904.

[0038] Specifically, the slide bar 901 guides the push plate 903 to slide in the front-back direction, the spring 902 pulls the push plate 903 to move forward, and the electromagnet 904 attracts the adsorption block 905, causing the push plate 903 to overcome the elastic force of the spring 902 and move backward until the adsorption block 905 is inserted into the electromagnet 904, thereby pushing the connecting baffle 906 to move backward and make it contact the lever of the rotating shaft 302.

[0039] In summary: When this utility model is in use, during the operation of the low-voltage switchgear 1, when heat dissipation and cooling are required to ensure its normal operation, the starting motor 301 drives the fan blades 303 to rotate rapidly, controlling the airflow so that the airflow passes through the interior of the low-voltage switchgear 1, circulating and carrying away heat. Dust in the outside air is intercepted by the dustproof net 4 and adheres to the back side of the dustproof net 4. Some debris is blocked in the holes of the dustproof net 4. To ensure stable airflow efficiency, the dustproof net 4 needs to be cleaned regularly. The rotation of the fan blades 303 can be stopped, and the electromagnet 904 can be activated to attract the adsorption block 905, causing the L-shaped plate to move backward and push the push plate 903 to slide along the surface of the slide rod 901. The push plate 903 overcomes the elastic force of the spring 902 and pushes the connecting baffle 906 until the adsorption block 905 is inserted into the electromagnet 904, and the connecting baffle... When the lever plate at shaft 302 contacts 906, the transmission sleeve 7 is connected to the cooling fan 3. The motor 301 is started, which drives the shaft 302 to rotate at a low speed. This causes the transmission sleeve 7 and the reciprocating screw 6 to rotate. The transmission sleeve 7 drives the dust brush 8 to sweep and clean the dust on the back of the dust screen 4. The rotating reciprocating screw 6 causes the unblocking plate 5 to slide back and forth along the surface of the guide rod. This allows the protruding insert of the unblocking plate 5 to pass through the holes of the dust screen 4 and push out the blockage inside. The dust and debris are discharged through the chip discharge groove of the cooling cylinder 202. After the cleaning work is completed, the electromagnet 904 and the motor 301 are stopped, and the spring 902 pulls the push plate 903 to slide forward and reset. This disconnects the connection between the connecting baffle 906 and the lever plate at shaft 302, and the cooling fan 3 continues to be driven for heat dissipation.

[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A guard device for low voltage switchgear assemblies, comprising a low voltage switchgear cabinet (1), characterized in that, The low-voltage switch cabinet (1) includes a heat dissipation shell (2), and a ventilation opening is provided on the rear side of the low-voltage switch cabinet (1). The heat dissipation shell (2) is fixedly installed at the ventilation opening. A heat dissipation fan (3) is provided inside the heat dissipation shell (2). A dustproof net (4) is fixedly installed inside the heat dissipation shell (2), and the heat dissipation fan (3) is located behind the dustproof net (4). A drain plate (5) is slidably installed inside the heat dissipation shell (2), and a reciprocating screw (6) is rotatably installed inside the heat dissipation shell (2). The drain plate (5) and the reciprocating screw (6) are connected by threads. One end of the reciprocating screw (6) passes through the dustproof net (4) and is fixedly connected to a transmission sleeve (7). A dust sweeping brush (8) is fixedly installed on the surface of the transmission sleeve (7), and the dust sweeping brush (8) is in contact with the rear side of the dustproof net (4). The transmission sleeve (7) is provided with a connecting component (9), which consists of a pusher, a connector and an adsorption component. The connector is slidably mounted on the surface of the pusher. The adsorption end of the adsorption component is located inside the transmission sleeve (7). The adsorbed end of the adsorption component is fixedly mounted on the connector. The rotating end of the cooling fan (3) extends into the transmission sleeve (7) and is correspondingly set with the connector of the connecting component (9).

2. A guard device for low voltage switchgear assemblies according to claim 1, characterized in that The heat dissipation housing (2) includes a limiting box (201), a heat dissipation cylinder (202), and a guardrail (203). The limiting box (201) is fixedly installed on the rear side of the low-voltage switchgear (1). The air inlet on the front side of the limiting box (201) is connected to the rear ventilation opening of the low-voltage switchgear (1). The heat dissipation cylinder (202) is fixedly installed on the rear side of the limiting box (201), and the guardrail (203) is fixedly installed on the rear side of the heat dissipation cylinder (202).

3. A guard device for low voltage switchgear assemblies according to claim 2, characterized in that The limiting box (201) is fixedly installed with a guide rod, and the guide rod is slidably inserted into the unblocking plate (5). The reciprocating screw (6) is rotatably installed inside the limiting box (201). The bottom of the heat dissipation cylinder (202) is provided with a chip removal groove, the dustproof net (4) is fixedly installed on the front side of the heat dissipation cylinder (202), and the heat dissipation fan (3) is set on the surface of the guardrail (203).

4. A guard device for low voltage switchgear assemblies according to claim 1, characterized in that The cooling fan (3) includes a motor (301), a shaft (302) and a fan blade (303). The motor (301) is fixedly installed on the rear side of the cooling shell (2). The output end of the motor (301) is fixedly installed with the shaft (302). The front end of the shaft (302) is located inside the transmission sleeve (7) and is fixedly installed with a baffle plate. The output end of the motor (301) is fixedly installed with the fan blade (303).

5. A protective device for low voltage switchgear assemblies according to claim 1, characterized in that The surface of the unblocking plate (5) is provided with multiple sets of protruding inserts, and the protruding inserts are arranged in a corresponding manner to the holes of the dustproof net (4).

6. A protective device for low voltage switchgear assemblies according to claim 1, characterized in that The pusher of the connecting assembly (9) includes a slide rod (901) and a spring (902). The slide rod (901) is fixedly installed on the inner front wall of the transmission sleeve (7), and the spring (902) is fixedly installed on the inner front wall of the transmission sleeve (7) and sleeved on the surface of the slide rod (901). The connecting component of the connecting assembly (9) comprises a push plate (903) and a connecting baffle (906), the push plate (903) is sleeved and arranged on the surface of the slide rod (901), the free end of the spring (902) is connected with the push plate (903), the rear side of the push plate (903) is fixedly provided with the connecting baffle (906), and the front side of the push plate (903) is fixedly provided with an L-shaped plate; The suction accessory of the connecting assembly (9) comprises an electromagnet (904) and a suction block (905), the electromagnet (904) is fixedly arranged in the transmission sleeve (7), the suction block (905) is fixedly arranged on the surface of the L-shaped plate, and the suction block (905) is correspondingly arranged with the electromagnet (904).

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