High dust isolation type molded case circuit breaker

Abstract

The invention relates to a high dust isolation type molded case circuit breaker, and relates to the technical field of circuit breakers, the high dust isolation type molded case circuit breaker comprises a dustproof box and a circuit breaker body installed in the dustproof box, a sealing door is slidably connected to the dustproof box, a dust cleaning device, an opening and closing device and a heat dissipation device are arranged in the dustproof box, the dust cleaning device is used for cleaning dust entering the dustproof box, and the opening and closing device is used for opening and closing the circuit breaker body. The opening and closing device is used for opening or closing the sealing door. The heat dissipation device is used for reducing the surface temperature of the plastic circuit breaker body. According to the invention, external dust can be effectively prevented from entering the dustproof box when a worker operates the circuit breaker body, so that normal work of the circuit breaker body is influenced by the dust, and the service life of the circuit breaker body is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a high dust isolation type molded case circuit breaker. Background Art

[0002] Molded case circuit breakers (MCCBs) are a common electrical protection device used extensively in industrial, commercial, and residential applications. Their primary function is to quickly cut off current when a fault such as an overload or short circuit occurs, protecting electrical equipment and circuits.

[0003] In the related art, after a molded case circuit breaker has been used for a long time, a large amount of dust will be absorbed on its surface. The intrusion of some dust can easily cause wear of internal components, thus affecting the service life of the molded case circuit breaker. Summary of the Invention

[0004] In order to increase the service life, the present application provides a high dust isolation type molded case circuit breaker.

[0005] The high dust isolation molded case circuit breaker provided in this application adopts the following technical solution: A high dust isolation type molded case circuit breaker, comprising a dustproof box and a circuit breaker body, the circuit breaker body is installed in the dustproof box, the dustproof box is provided with a sealing door, and the dustproof box is provided with a Dust removal device, including drive gear ring, air supply box, The driving gear ring is arranged in a dustproof box, and a plurality of fan blades are arranged on the driving gear ring. When the driving gear ring rotates, the fan blades form an airflow flowing toward the opening of the dustproof box. The air supply box is provided with a gas filtering device for filtering dust in the air, and the air supply box is connected to the space where the fan blades are located through a pipe; Opening and closing device, including pneumatic rod, electromagnet, The pneumatic rod is connected to the inflation component through a pipeline. The inflation component is provided with a driving power supply. The driving power supply controls the inflation component to inflate the pneumatic rod. The output rod of the pneumatic rod pushes the sealing door to move outward. The electromagnet is electrically connected to the driving power supply, the electromagnet is magnetically connected to the sealing door, the electromagnet is linked to the driving gear ring through the gear set, and the driving gear ring controls the sealing door to slowly close through the electromagnet; The heat dissipation device is used to dissipate heat from the surface of the circuit breaker body.

[0006] By adopting the above technical solution, when the circuit breaker body is working normally, the heat dissipation device cools down the surface of the circuit breaker body, thereby preventing the circuit breaker body from being overheated during operation.

[0007] When the circuit breaker body needs to be operated, the sealed door is opened by the pneumatic rod, and the drive gear ring is rotated synchronously, so that the fan blades form an airflow from the inside to the outside, thereby preventing external dust from entering the dustproof box. In addition, the air supply box provides sufficient air to the fan blades to avoid backflow in the dustproof box, which allows external dust to enter the dustproof box.

[0008] After the operation is completed, the sealing door is slowly closed by driving the gear to control the electromagnet, so that a gap is formed between the sealing door and the dust box, and the air flow in the gap gradually increases, which can effectively discharge the dust remaining in the dust box and effectively improve the service life of the circuit breaker body.

[0009] At the same time, by driving the gear ring and the electromagnet in linkage, the consistency of the internal parts' movements can be effectively improved, which can effectively improve work efficiency and reduce energy waste.

[0010] Optionally, a first sliding rod and a second sliding rod are provided on the sealing door, and both the first sliding rod and the second sliding rod are slidingly provided in the dustproof box. After the second sliding rod slides out of the dustproof box, the end of the first sliding rod is engaged with the dustproof box and the first sliding rod is folded, thereby controlling the rotation of the sealing door.

[0011] By adopting the above technical solution, the sealing door first slides open the dust box under the action of the first sliding rod and the second sliding rod. After the second sliding rod is separated from the dust box, the sealing door rotates to fully open the dust box, which can effectively prevent the sealing door from forming air backflow when the dust box is opened, thereby preventing external dust from entering the dust box.

[0012] Optionally, the dust cleaning device further includes a driving motor disposed in the dustproof box, the driving motor is engaged with the driving gear, and a button for starting or shutting down the driving motor is disposed on the sliding path of the first sliding rod.

[0013] By adopting the above technical solution, the first sliding rod starts the drive motor when sliding, so that the drive gear ring starts working in advance when the sealing door is not fully opened, thereby avoiding air backflow formed when the sealing door is separated from the dustproof box.

[0014] Optionally, a fixed tube is provided in the dustproof box, and the driving gear ring is rotatably set on the fixed tube. The fixed tube and the driving gear ring cooperate to form an air supply area and a wiring area in the dustproof box. The air supply box is connected to the air supply area, and a number of air supply holes are opened on the driving gear ring in the air supply area. The external wires are connected to the circuit breaker body through the wiring area.

[0015] By adopting the above technical solution, the wires are arranged independently, thereby reducing the influence of air on the wires, and effectively improving the stability of the circuit breaker body after assembly.

[0016] Optionally, the heat dissipation device includes a dustproof leather cover mounted on the surface of the circuit breaker body, with several water cooling channels opened on the dustproof leather cover. Both ends of the water cooling channels are connected to a cold water tank through pipes, and the cold water tank transfers cold water to the water cooling channels through a water injection pump to form a reflux.

[0017] By adopting the above technical solution, the dustproof leather cover and the dustproof box cooperate to provide double dustproof protection for the circuit breaker body, thereby further preventing the circuit breaker body from being affected by external dust. At the same time, the surface of the circuit breaker body is fully cooled through the water cooling channel on the surface of the dustproof leather cover, thereby improving the service life of the circuit breaker body.

[0018] Optionally, an annular bevel gear is axially sleeved on the surface of the electromagnet, and the annular bevel gear is rotatably connected to the electromagnet, and a limit block is provided on the electromagnet and slidably connected to the dustproof box, and the limit block is used to limit the rotation of the electromagnet.

[0019] By adopting the above technical solution, it is achieved that after the annular bevel gear disk rotates, the driving electromagnet slides toward or away from the driving gear ring, thereby controlling the opening or closing of the sealing door through the electromagnet.

[0020] Optionally, a bevel gear is meshed on the annular bevel gear, a drive rod is provided on the bevel gear, and a slow gear ring is provided on the drive gear ring. The teeth on the slow gear ring are sparsely distributed, and the drive gear ring is meshed with the drive rod through the slow gear, thereby controlling the electromagnet to slowly slide toward the drive gear ring.

[0021] By adopting the above technical solution, the driving gear ring and the electromagnet are linked together, so that after the driving gear ring rotates, the electromagnet can be controlled to slowly close the sealing door.

[0022] Optionally, the annular bevel gear is slidably connected to the dustproof box, and the annular bevel gear engages or disengages with the bevel gear after sliding. A reset motor connected to the annular bevel gear is provided in the dustproof box. The reset motor controls the rotation of the annular bevel gear, thereby controlling the electromagnet to slide away from the driving gear ring.

[0023] By adopting the above technical solution, after the sealing door is opened, the annular bevel gear is separated from the bevel gear to prevent the annular bevel gear from being affected by the bevel gear, and the position of the electromagnet is adjusted by the reset motor so that the electromagnet can be accurately magnetically connected to the sealing door when the sealing door is closed. At the same time, preparations are made for driving the gear ring to drive the electromagnet to slowly close the sealing door.

[0024] Optionally, the opening and closing device further includes a rotary switch, which is used to control and select whether the driving power supply is connected to the inflation component or the driving power supply is connected to the electromagnet.

[0025] By adopting the above technical solution, the rotary switch controls the power on and off of the inflation component or the electromagnet, thereby avoiding conflicts between the inflation component and the electromagnet, which may cause the sealing door to be unable to open or close normally.

[0026] Optionally, an arc-shaped protruding guide block is provided on the sealing door, and an arc-shaped inclined surface that fits with the guide block is provided at the opening of the dustproof box.

[0027] By adopting the above technical solution, when the sealing door is slowly closed, the air flow speed between the guide block and the curved slope gradually increases, and the dust in the dustproof box flows along the surface of the guide block and is discharged to the outside from between the guide block and the curved slope.

[0028] In summary, this application includes at least one of the following beneficial technical effects: 1. This application can effectively prevent external dust from entering the dustproof box when the staff is operating the circuit breaker body, so that the dust affects the normal operation of the circuit breaker body, thereby increasing the service life of the circuit breaker body; 2. This application uses the slow closing of the sealed door to create a faster air flow in the gap between the sealed door and the dustproof box, thereby blowing out the dust remaining in the dustproof box; 3. This application forms a double dust-proof protection for the circuit breaker body by using a dust-proof leather cover and a dust-proof box mounted on the circuit breaker body, which further prevents the impact of dust on the circuit breaker body and can cool the circuit breaker body, effectively improving the service life of the circuit breaker body. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of this application; Figure 2 It is a schematic diagram of the explosion structure of this application; Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure along the AA plane; Figure 4 yes Figure 1 Schematic diagram of the cross-sectional structure along plane BB; Figure 5 yes Figure 1 Schematic diagram of the cross-sectional structure along the CC plane; Figure 6 yes Figure 4 A partial enlarged schematic diagram of part A; Figure 7 It is a structural diagram of the present application, mainly showing the opening and closing device; Figure 8 yes Figure 7 A partial enlarged schematic diagram of part B.

[0030] Marking instructions: 1. Dustproof box; 200. Sealing door; 201. Guide block; 202. First sliding rod; 203. Second sliding rod; 204. Sliding block; 205. Iron sheet; 3. Dust cleaning device; 301. Driving motor; 302. Driving gear ring; 303. Fan blade; 304. Air supply box; 305. Air outlet plate; 4. Opening and closing device; 401. Pneumatic rod; 402. Inflatable component; 403. Annular bevel gear disc; 404. Driving pipe; 405. Connecting rod; 406. Limit block; 407. Metal block; 408. Return spring; 40 9. Electromagnet; 410. Rotary switch; 411. Slow gear ring; 412. Driving rod; 413. Bevel gear; 414. First reset gear ring; 415. Second reset gear ring; 416. Reset motor; 417. Limiting gear; 418. Elastic claw; 5. Heat dissipation device; 501. Dustproof leather cover; 502. Water cooling channel; 503. Cold water tank; 6. First sliding groove; 7. Second sliding groove; 8. Positioning groove; 9. Fixing pipe; 10. Air supply area; 11. Wiring area; 12. Circuit breaker body; 13. Driving power supply; 14. Mounting groove. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1 -Attached Figure 8 , further details of this application are given.

[0032] A high dust isolation molded case circuit breaker, refer to Figure 1 、 Figure 2 The circuit breaker body 12 is mounted inside the dustproof box 1 and includes a dustproof box 1 with a sealed door 200 slidably connected thereto. A dust cleaning device 3, an opening and closing device 4, and a heat dissipation device 5 are provided inside the dustproof box 1. The dust cleaning device 3 is used to remove dust entering the dustproof box 1, the opening and closing device 4 is used to open or close the sealed door 200, and the heat dissipation device 5 is used to reduce the surface temperature of the circuit breaker body 12. Furthermore, an accessory box for mounting accessories is provided above the dustproof box 1.

[0033] Reference Figure 2 、 Figure 3 、 Figure 4 Two first sliding grooves 6 are defined within the dustproof box 1 near one of the inner walls of the side, and two second sliding grooves 7 are defined within the dustproof box 1 near the inner wall of the other side, with the second sliding grooves 7 being shorter than the first sliding grooves 6. A positioning groove 8 is defined within the inner wall of the first sliding groove 6 at the end away from the sealing door 200, and the first and second sliding grooves 6 and 7 are open at the ends near the sealing door 200.

[0034] Reference Figure 2 、 Figure 3A curved, protruding guide block 201 is integrally connected to one side of the sealed door 200, and the sidewall at the opening of the dustproof box 1 is provided with a curved, inclined surface that matches the curvature of the guide block 201. Two first sliding rods 202 corresponding to the positions of the first sliding slots 6 and two second sliding rods 203 corresponding to the positions of the second sliding slots 7 are fixedly connected to the sealed door 200. The first sliding rods 202 are composed of two hinged short rods, and the length of the short rod closest to the sealed door 200 is greater than or equal to the length of the second sliding rods 203.

[0035] A sliding block 204 is fixedly connected to the first sliding rod 202, and the sliding block 204 extends into the positioning groove 8. At the same time, a clamping block is installed in the sliding block 204. When the sliding block 204 slides to the inner wall of the positioning groove 8 close to the sealing door 200 and abuts against it, the clamping block is clamped with the positioning groove 8.

[0036] Reference Figure 2 、 Figure 3 The dust cleaning device 3 includes a drive motor 301 fixedly connected to the dustproof box 1, and a button for starting or turning off the drive motor 301 is installed at the bottom of the first sliding groove 6. When the sliding block 204 slides away from the dustproof box 1, the sliding block 204 presses the button and starts or turns off the drive motor 301.

[0037] Reference Figure 2 、 Figure 3 、 Figure 5 An output gear is fixedly connected to the output rod of the driving motor 301. In addition, a fixed tube 9 is fixedly connected inside the dustproof box 1. The side of the fixed tube 9 close to the opening is rotatably connected to a driving gear ring 302 that meshes with the output gear. The fixed tube 9 and the driving gear ring 302 cooperate with the dustproof box 1 to form an air replenishing area 10 and a wiring area 11, wherein the wiring area 11 is located inside the fixed tube 9.

[0038] Reference Figure 1 、 Figure 2 、 Figure 5 A plurality of fan blades 303 are fixedly connected to the side of the driving gear ring 302 close to the sealing door 200, and a plurality of air supply holes for air flow are opened on the driving gear ring 302. In addition, an air supply pipe connected to the air supply area 10 is fixedly connected to the side wall opposite to the opening of the dustproof box 1. The air supply pipe is connected to the air supply box 304, and a gas filter device for filtering dust in the air is installed in the air supply box 304.

[0039] Reference Figure 2 、 Figure 5Inside the dustproof box 1, an air outlet plate 305 is fixedly connected between the drive gear ring 302 and the opening. This plate covers the fan blades 303 and has a number of air outlet holes. The side of the air outlet plate 305 facing away from the drive gear ring 302 is fixedly connected to the circuit breaker body 12. External wires pass through the side wall of the dustproof box 1 and into the wiring area 11. From there, they connect to the circuit breaker body 12. A sealing ring, fixedly connected to the dustproof box 1, is installed at the connection between the external wires and the dustproof box 1.

[0040] The heat dissipation device 5 includes a dustproof leather cover 501 mounted on the circuit breaker body 12. A plurality of water cooling channels 502 are provided on the surface of the dustproof leather cover 501. The two ends of the water cooling channel 502 are respectively connected to a water injection pipe and a water outlet pipe. The water injection pipe and the water outlet pipe pass through the side wall of the dustproof box 1 from the wiring area 11 and are connected to a cold water tank 503. The water injection pipe is connected to the cold water tank 503 through a water injection pump. In addition, a sealing ring fixedly connected to the dustproof box 1 is provided at the connection between the water injection pipe, the water outlet pipe and the dustproof box 1. The water injection pump is used to stably inject water into the water cooling channel 502.

[0041] Reference Figure 2 、 Figure 5 The opening and closing device 4 includes two pneumatic rods 401 fixedly connected to the top and bottom inner walls of the dustproof box 1, respectively. The output rods of the pneumatic rods 401 slide toward or away from the sealed door 200. The pneumatic rods 401 are connected to an inflation assembly 402 via an inflation tube, which can inject air into the pneumatic rods 401. The inflation assembly 402 is connected to the pneumatic rods 401 via a return air pipe to receive the air within the pneumatic rods 401. In addition, a driving power supply 13 is fixedly connected to the dustproof box 1. The driving power supply 13 controls the operation of the pneumatic rods 401 through an electrical connection with the inflation assembly 402.

[0042] Reference Figure 4 、 Figure 6 The dustproof box 1 has two mounting grooves 14 on the side wall near the second sliding groove 7. An annular bevel gear plate 403 is slidably connected in the mounting groove 14, and the inner ring of the annular bevel gear plate 403 is fixedly connected to the driving tube 404. In addition, driving grooves are provided on the two opposite inner walls of the mounting groove 14 and the annular bevel gear plate 403 in the same sliding direction. The driving tube 404 extends into the driving groove in the corresponding direction and slides along the driving groove.

[0043] The bottoms of the two driving grooves are respectively provided with a first connecting groove and a second connecting groove. The driving tube 404 is penetrated by a connecting rod 405 threadedly connected to the driving tube 404. In addition, the connecting rod 405 is fixedly connected to the limiting block 406 at the part of the annular bevel gear plate 403 away from the opening of the sealing door 200. The side wall of the second connecting groove is provided with a limiting groove corresponding to the position of the limiting block 406. The limiting block 406 extends into the limiting groove and abuts against the inner wall of the limiting groove, so that after the driving tube 404 is rotated, it can drive the connecting rod 405 to slide in the first connecting groove or the second connecting groove.

[0044] Reference Figure 2 、 Figure 4 、 Figure 6 A metal block 407 is rotatably connected to the bottom of the second connecting groove. One end of a return spring 408 is fixedly connected to the metal block 407 near the connecting rod 405, and the other end of the return spring 408 abuts the connecting rod 405. Furthermore, an electromagnet 409 is embedded and fixed within the connecting rod 405. The connecting wires on the driving power supply 13 pass through the metal block 407 and the return spring 408 in sequence before being connected to the electromagnet 409. An iron sheet 205 corresponding to the position of the electromagnet 409 is fixedly connected to the sealing door 200. Furthermore, a rotary switch 410 is fixedly connected to the dustproof box 1, wherein the rotary switch 410 is used to control and select whether the driving power supply 13 is connected to the inflation assembly 402 or the electromagnet 409.

[0045] Reference Figure 2 、 Figure 3 、 Figure 7 , a slow gear ring 411 is fixedly connected to the driving gear ring 302, wherein the teeth on the slow gear ring 411 are sparsely distributed, and the slow gear ring 411 is staggered with the output gear. In addition, a rotation groove is provided in the dustproof box 1, in which a driving rod 412 is rotatably connected to the rotating groove and meshed with the slow gear ring 411, and one end of the driving rod 412 away from the slow gear ring 411 is fixedly connected to a bevel gear 413 meshed with the annular bevel gear plate 403. In this way, the driving motor 301 can control the connecting rod 405 to slide toward the opening of the dustproof box 1 through the slow gear ring 411 and the bevel gear 413, and when the annular bevel gear plate 403 slides away from the bevel gear 413, the annular bevel gear plate 403 is separated from the bevel gear 413.

[0046] Reference Figure 2 、 Figure 6 、 Figure 7 A first reset gear ring 414 is fixedly connected to the side of the annular bevel gear disk 403 away from the bevel gear 413. At the same time, a reset motor 416 is fixedly connected in the dustproof box 1. A button for controlling the start of the reset motor 416 is fixedly connected in the side wall of the driving groove away from the driving gear ring 302, and a button for controlling the shutdown of the reset motor 416 is installed on the inner wall of the limit groove close to the driving gear ring 302.

[0047] Reference Figure 7 、 Figure 8 A limiting gear 417 is fixedly connected to the outer wall of the output rod of the reset motor 416, wherein the teeth on the limiting gear 417 are all tilted in the same direction of rotation. A second reset gear ring 415 is mounted on the outer surface of the limiting gear 417, which is constantly meshed with the first reset gear ring 414. A plurality of circumferentially arranged elastic claws 418 are fixedly connected to the inner surface of the second reset gear ring 415, and the elastic claws 418 extend between two teeth on the limiting gear 417.

[0048] The implementation principle of the embodiment of the present application is: after the circuit breaker body 12 is installed in place, when it is working, the cold water in the cold water tank 503 is passed into the water cooling channel 502 of the dustproof leather cover 501 through the water injection pump, thereby cooling the outer shell of the circuit breaker body 12.

[0049] At the same time, the switch 410 is turned to connect the driving power supply 13 to the electromagnet 409, so that the electromagnet 409 is adsorbed with the iron sheet 205 and the metal block 407 in the sealing door 200 respectively, thereby fixing the sealing door 200 and causing the return spring 408 to deform and compress, wherein the return spring 408 is a spring made of non-metallic material.

[0050] When it is necessary to open the sealing door 200 to operate the circuit breaker body 12, the rotary switch 410 is manipulated to connect the driving power supply 13 to the inflation assembly 402 and disconnect the driving power supply 13 from the electromagnet 409, so that the inflation assembly 402 inflates the pneumatic rod 401, thereby pushing the sealing door 200 outward. It should be noted that after the inflation assembly 402 is powered on, it only inflates the pneumatic rod 401 once, and stops inflating after the inflation is completed. At this time, the sliding block 204 slides outward in the first sliding groove 6 and the second sliding rod 203 slides outward in the second sliding groove 7. When the sliding block 204 is engaged with the positioning groove 8, the second sliding rod 203 falls off from the second sliding groove 7. The user can open the sealing door 200 from the side where the second sliding rod 203 is located, so that the sealing door 200 rotates radially along the positioning groove 8 and the sliding block 204.

[0051] Furthermore, when the slider 204 begins to slide, the slider 204 contacts and presses the button for starting or stopping the drive motor 301, thereby starting the drive motor 301. After the drive motor 301 starts, it drives the drive ring gear 302 to rotate via the output gear, thereby rotating the fan blades 303 within the dustproof box 1 to form an outward airflow, thereby preventing external dust from entering the dustproof box 1. After the fan blades 303 rotate, the external air is filtered by the air supply box 304 and enters the air supply area 10, thereby forming an air pressure balance.

[0052] In addition, when the rotary switch 410 moves, the action force between the electromagnet 409 and the metal block 407 is eliminated, and the return spring 408 deforms and stretches to push the connecting rod 405 outward. Since the limit block 406 on the connecting rod 405 extends into the limit groove, and the connecting rod 405 is threadedly connected to the drive tube 404, and the drive tube 404 is fixed to the annular bevel gear 403, the annular bevel gear 403 is moved away from the drive gear, thereby separating the annular bevel gear 403 from the bevel gear 413.

[0053] At the same time, the reset motor 416 is turned on during the movement of the annular bevel gear 403, and the reset motor 416 rotates and drives the annular bevel gear to rotate, thereby driving the connecting rod 405 to slide away from the driving gear ring 302 until the limit block 406 of the connecting rod 405 touches and presses the button to turn off the reset motor 416. The reset motor 416 stops working, and the connecting rod 405 extends from the driving groove away from the driving gear ring 302 to the outside of the dustproof box 1. It should be noted that the surface of the above-mentioned button is provided with a wear-resistant layer.

[0054] When the sealing door 200 needs to be closed, the sealing door 200 is rotated radially along the sliding block 204 so that the second sliding rod 203 is aligned with the second sliding groove 7. At this time, the connecting rod 405 is in contact with the sealing door 200. Then, the rotation button is turned to disconnect the driving power supply 13 from the inflation component 402 and connect the driving power supply 13 to the electromagnet 409. At this time, the electromagnet 409 starts to work and magnetically attracts the metal block 407 and the iron sheet 205, thereby rotating the connecting rod 405 and the annular bevel gear 403 toward the driving gear ring 302. At this time, the rotation direction of the annular bevel gear 403 is opposite to its previous rotation direction. The annular bevel gear 403 is meshed with the bevel gear 413, allowing the bevel gear 413 to drive the annular bevel gear 403 to rotate, and the connecting rod 405 slides toward the driving gear ring 302, thereby driving the sealing door 200 to close.

[0055] It should be noted that at this time, the annular bevel gear 403 will drive the limiting gear 417 to rotate. At this time, the tooth protrusion on the limiting gear 417 squeezes the elastic claw 418, causing the elastic claw 418 to deform toward the inner wall close to the second reset gear ring 415, thereby avoiding the elastic claw 418 from conflicting with the limiting spring.

[0056] During the closing process of the sealing door 200, the sealing door 200 and the output rod of the pneumatic rod 401 squeeze each other, and at the same time, the sealing door 200 slowly closes under the action of the slow gear ring 411. Since the rotation speed of the fan blade 303 remains unchanged, the gap between the sealing door 200 and the dustproof box 1 gradually decreases, and under the action of the guide block 201, the air flow rate between the sealing door 200 and the dustproof box 1 increases, thereby blowing some of the stubborn dust that has entered the dustproof box 1 out of the gap between the sealing door 200 and the dustproof box 1. Until the sliding block 204 touches and presses the button for starting or stopping the drive motor 301 again, the drive motor 301 stops working, and the sealing door 200 is completely closed.

[0057] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A high dust isolation type molded case circuit breaker, comprising a dustproof box (1) and a circuit breaker body (12), wherein the circuit breaker body (12) is installed in the dustproof box (1), and the dustproof box (1) is provided with a sealing door (200), characterized in that: The dustproof box (1) is provided with The dust cleaning device (3) includes a driving gear ring (302) and an air supply box (304). The driving gear ring (302) is rotatably arranged in the dustproof box (1), and a plurality of blades (303) are arranged on the driving gear ring (302). After the driving gear ring (302) rotates, the blades (303) form an airflow flowing toward the opening of the dustproof box (1). The air supply box (304) is provided with a gas filtering device for filtering dust in the air, and the air supply box (304) is connected to the space where the fan blades (303) are located through a pipeline; The opening and closing device (4) includes a pneumatic rod (401) and an electromagnet (409). The pneumatic rod (401) is connected to an inflatable component (402) via a pipeline. A driving power source (13) is provided on the inflatable component (402). The driving power source (13) controls the inflatable component (402) to inflate the pneumatic rod (401). The output rod of the pneumatic rod (401) pushes the sealing door (200) to move outward. The electromagnet (409) is electrically connected to the driving power supply (13), the electromagnet (409) is magnetically connected to the sealing door (200), the electromagnet (409) is linked to the driving gear ring (302) through the gear set, and the driving gear ring (302) controls the sealing door (200) to slowly close through the electromagnet (409); The heat dissipation device (5) is used for dissipating heat from the surface of the circuit breaker body (12).

2. The high dust isolation molded case circuit breaker according to claim 1, characterized in that: A first sliding rod (202) and a second sliding rod (203) are provided on the sealing door (200), and the first sliding rod (202) and the second sliding rod (203) are both slidably arranged in the dustproof box (1). After the second sliding rod (203) slides out of the dustproof box (1), the end of the first sliding rod (202) is engaged with the dustproof box (1) and the first sliding rod (202) is folded, thereby controlling the rotation of the sealing door (200).

3. The high dust isolation molded case circuit breaker according to claim 2, characterized in that: The dust cleaning device (3) further comprises a driving motor (301) arranged in the dustproof box (1), the driving motor (301) being engaged with a driving gear, and a button for starting or shutting down the driving motor (301) being arranged on a sliding path of the first sliding rod (202).

4. The high dust isolation molded case circuit breaker according to claim 1, characterized in that: A fixed tube (9) is provided in the dustproof box (1), and the driving gear ring (302) is rotatably provided on the fixed tube (9). The fixed tube (9) and the driving gear ring (302) cooperate to form an air supply area (10) and a wiring area (11) in the dustproof box (1). The air supply box (304) is connected to the air supply area (10), and a plurality of air supply holes are opened on the driving gear ring (302) at the air supply area (10). The external wires are connected to the circuit breaker body (12) through the wiring area (11).

5. The high dust isolation molded case circuit breaker according to claim 1, characterized in that: The heat dissipation device (5) comprises a dustproof leather cover (501) sleeved on the surface of the circuit breaker body (12); a plurality of water cooling channels (502) are provided on the dustproof leather cover (501); both ends of the water cooling channels (502) are connected to a cold water tank (503) via a pipe; and the cold water tank (503) transmits cold water into the water cooling channels (502) via a water injection pump to form a reflux.

6. The high dust isolation molded case circuit breaker according to claim 1, characterized in that: An annular bevel gear disc (403) is axially sleeved on the surface of the electromagnet (409), and the annular bevel gear disc (403) is rotatably connected to the electromagnet (409). A limit block (406) is provided on the electromagnet (409) and is slidably connected to the dustproof box (1). The limit block (406) is used to limit the rotation of the electromagnet (409).

7. The high dust isolation molded case circuit breaker according to claim 6, characterized in that: The annular bevel gear (403) is meshed with a bevel gear (413), a driving rod (412) is provided on the bevel gear (413), and a slow gear ring (411) is provided on the driving gear ring (302). The teeth on the slow gear ring (411) are sparsely distributed, and the driving gear ring (302) is meshed with the driving rod (412) through the slow gear, thereby controlling the electromagnet (409) to slowly slide toward the driving gear ring (302).

8. The high dust isolation molded case circuit breaker according to claim 6, characterized in that: The annular bevel gear (403) is slidably connected to the dustproof box (1), and the annular bevel gear (403) engages with or disengages from the bevel gear (413) after sliding. A reset motor (416) connected to the annular bevel gear (403) is provided in the dustproof box (1). The reset motor (416) controls the rotation of the annular bevel gear (403), thereby controlling the electromagnet (409) to slide away from the driving gear ring (302).

9. The high dust isolation molded case circuit breaker according to claim 1, characterized in that: The opening and closing device (4) further comprises a rotary switch (410), and the rotary switch (410) is used to control and select whether the driving power supply (13) is connected to the inflation component (402) or whether the driving power supply (13) is connected to the electromagnet (409).

10. The high dust isolation molded case circuit breaker according to claim 1, characterized in that: The sealing door (200) is provided with an arc-shaped protruding guide block (201), and the opening of the dustproof box (1) is provided with an arc-shaped inclined surface that matches the guide block (201).

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