Molded case circuit breaker high-efficiency arc extinguishing device based on cooperation of magnetic blowing and air blowing

Abstract

The utility model relates to the field of electrical engineering, in particular to a molded case circuit breaker efficient arc extinguishing device based on cooperation of magnetic blowing and air blowing, which comprises a molded case, a rotating shaft, a first contact, a second contact, an arc extinguishing bin and the like, the lower part of the molded case is rotatably connected with the rotating shaft, the rotating shaft is connected with the first contact, and the right upper part of the molded case is connected with the arc extinguishing bin. The left lower part of the arc extinguishing chamber is connected with a second contact, and the second contact is contacted with the first contact. According to the utility model, the first contact and the second contact are separated and powered off by rotating the rotating shaft with a hand, or the sliding rod is moved by electrifying the electromagnetic coil, so that the first contact rotates and is powered off, and the electric arc is pushed and guided to flow into the arc extinguishing cover under the action of the magnetic blow-out permanent magnet for arc extinguishing; therefore, arc extinguishing can be carried out in a magnetic blowing and air blowing mode while manual or automatic power off is carried out, arc damage is prevented, the arc extinguishing efficiency is improved, the risk of accidents is reduced, and the arc extinguishing device is safe and convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of electrical engineering, and in particular to a high-efficiency arc extinguishing device for molded case circuit breakers based on the combination of magnetic blowing and air blowing. Background Technology

[0002] In power systems, molded case circuit breakers are an important electrical protection device, widely used in low-voltage power distribution systems and motor protection circuits. Their main function is to quickly disconnect the circuit when overload, short circuit or other faults occur, so as to protect electrical equipment from damage and ensure the safety of personnel and equipment.

[0003] Existing molded case circuit breakers typically rely on a single arc extinguishing method, such as arc-extinguishing plates, magnetic blow-out, or air blow-out. However, current molded case circuit breakers only use a single arc extinguishing method, which can easily lead to prolonged arc extinguishing time and reduced arc extinguishing efficiency when facing high voltage or high current faults. This can cause arc damage, increase the risk of accidents, and pose a huge threat to the stable operation of the power system and the safety of people's lives and property.

[0004] Therefore, it is necessary to design a high-efficiency arc extinguishing device for molded case circuit breakers that can manually or automatically cut off power while extinguishing the arc through magnetic blowing and air blowing, to prevent arc damage, improve arc extinguishing efficiency, reduce the risk of accidents, and be safe and convenient to use. Utility Model Content

[0005] To overcome the shortcomings of current molded case circuit breakers that only employ a single arc-extinguishing method, which easily leads to prolonged arc-extinguishing time, reduced arc-extinguishing efficiency, arc damage, and increased risk of accidents when facing high-voltage or high-current faults, posing a significant threat to the stable operation of the power system and the safety of people's lives and property, this utility model provides a high-efficiency arc-extinguishing device for molded case circuit breakers that can simultaneously extinguish arcs through magnetic blowing and air blowing, preventing arc damage, improving arc-extinguishing efficiency, reducing the risk of accidents, and is safe and convenient to use.

[0006] The technical solution is as follows: A high-efficiency arc-extinguishing device for a molded case circuit breaker based on the combination of magnetic blowing and air blowing, comprising a molded case, a rotating shaft, a first contact, a second contact, an arc-extinguishing chamber, an arc-extinguishing cover, a magnetic blowing permanent magnet, a power-off component, and an air blowing component. The rotating shaft is rotatably connected to the lower part of the molded case, and the first contact is connected to the rotating shaft. The arc-extinguishing chamber is connected to the upper right part of the molded case, and the second contact is connected to the lower left part of the arc-extinguishing chamber. The second contact contacts the first contact. The arc-extinguishing cover is connected to the right part of the arc-extinguishing chamber, and the magnetic blowing permanent magnet is connected to the left part of the arc-extinguishing chamber. The power-off component for power-off is provided on the molded case, and the air blowing component for extinguishing the arc is provided on the lower left part of the molded case.

[0007] Optionally, the power-off assembly includes a fixed plate, a sliding rod, a sleeve, a spring, and an electromagnetic coil. The fixed plate is connected to the lower right left side of the arc-extinguishing chamber, and the sleeve is connected to the lower right side of the plastic shell. The sliding rod is slidably connected to the sleeve, and the sliding rod is slidably connected to the fixed plate. A spring is connected between the sliding rod and the sleeve, and an electromagnetic coil is connected to the outside of the sleeve.

[0008] Optionally, the fixing piece is L-shaped.

[0009] Optionally, the sleeve is T-shaped.

[0010] Optionally, the air blowing assembly includes an air blowing cylinder, an air cover, and a limiting block. The air blowing cylinder is connected to the lower left part of the plastic shell, and the air cover is slidably connected to the right side of the air blowing cylinder. The air cover is connected to a slide rod, and the limiting block is connected to the right side of the air cover.

[0011] Optionally, an air inlet is provided on the left side of the air-blowing cylinder.

[0012] The beneficial effects of this utility model are as follows: This utility model can disconnect the first contact from the second contact by manually rotating the shaft, thereby cutting off the power, or can move the slide rod by energizing the electromagnetic coil, thereby rotating the first contact to cut off the power. Under the action of the magnetic blow permanent magnet, the arc is pushed and guided to the arc extinguishing hood to extinguish the arc. At the same time as the gas hood moves, the gas in the gas cylinder is ejected to extinguish the arc. Thus, it can manually or automatically cut off the power while extinguishing the arc by magnetic blowing and gas blowing, preventing arc damage, improving arc extinguishing efficiency, reducing the risk of accidents, and making it safe and convenient to use. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a three-dimensional structural diagram of the arc-extinguishing cover and other components of this utility model.

[0015] Figure 3 This is a three-dimensional structural diagram of the air-blowing cylinder and other components of this utility model.

[0016] Figure 4 This is a three-dimensional structural diagram of the limiting block and other components of this utility model.

[0017] Figure 5 This is a three-dimensional structural diagram of the slide bar and other components of this utility model.

[0018] Figure 6 This is a three-dimensional structural diagram of the spring and other components of this utility model.

[0019] The above-mentioned figures include the following reference numerals: 1: plastic shell, 2: rotating shaft, 3: first contact, 4: second contact, 5: arc extinguishing chamber, 6: arc extinguishing cover, 7: magnetic blow permanent magnet, 8: fixing plate, 9: sliding rod, 10: air blow bottle, 11: air cover, 12: limiting block, 13: sleeve, 14: spring, 15: electromagnetic coil. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] A high-efficiency arc-extinguishing device for molded case circuit breakers based on a combination of magnetic blow and air blow, such as Figures 1-6 As shown, the device includes a plastic shell 1, a rotating shaft 2, a first contact 3, a second contact 4, an arc-extinguishing chamber 5, an arc-extinguishing cover 6, a magnetic blow-out permanent magnet 7, a power-off assembly, and an air-blowing assembly. The rotating shaft 2 is rotatably connected to the lower part of the plastic shell 1, and the first contact 3 is connected to the rotating shaft 2. The arc-extinguishing chamber 5 is connected to the upper right part of the plastic shell 1, and the second contact 4 is connected to the lower left part of the arc-extinguishing chamber 5. The second contact 4 contacts the first contact 3. The arc-extinguishing cover 6 is connected to the right part of the arc-extinguishing chamber 5, and the magnetic blow-out permanent magnet 7 is connected to the left part of the arc-extinguishing chamber 5. The plastic shell 1 is provided with a power-off assembly for power-off, and the lower left part of the plastic shell 1 is provided with an air-blowing assembly for extinguishing the arc with air.

[0022] like Figure 2 , Figure 5 and Figure 6 As shown, the power-off assembly includes a fixing plate 8, a sliding rod 9, a sleeve 13, a spring 14, and an electromagnetic coil 15. The fixing plate 8 is connected to the lower right left side of the arc-extinguishing chamber 5. The fixing plate 8 is L-shaped for easy support and fixation. The sleeve 13 is connected to the lower right side of the plastic shell 1. The sleeve 13 is T-shaped for easy guidance. The sliding rod 9 is slidably connected to the sleeve 13. The sliding rod 9 is slidably connected to the fixing plate 8. The spring 14 is connected between the sliding rod 9 and the sleeve 13. The electromagnetic coil 15 is connected to the outside of the sleeve 13.

[0023] like Figures 1-4As shown, the air blowing assembly includes an air blowing cylinder 10, an air cover 11, and a limiting block 12. The air blowing cylinder 10 is connected to the lower left part of the plastic shell 1. An air inlet is opened on the left side of the air blowing cylinder 10 to facilitate the entry of gas. The air cover 11 is slidably connected to the right side of the air blowing cylinder 10. The air cover 11 is connected to the slide rod 9. The limiting block 12 is connected to the right side of the air cover 11.

[0024] This device can be used when efficient arc extinguishing of the molded case circuit breaker 1 is required. The molded case 1 is installed in a designated position, and an external gas supply pipe is connected through the air inlet to allow gas to enter the gas cylinder 10. When power is required, the first contact 3 is disengaged from the second contact 4 by manually rotating the shaft 2, or the electromagnetic coil 15 is energized. When current passes through the electromagnetic coil 15, a magnetic field is generated, causing the slide rod 9 to move along the fixing plate 8 and the sleeve 13 in the direction of the electromagnetic coil 15. The spring 14 is compressed, causing the gas cover 11 to move, and the limiting block 12 to move and contact the first contact 3, causing the first contact 3 to rotate and disengage from the second contact 4 for automatic power disconnection. The fixing plate 8 is L-shaped for easy support and fixation, and the sleeve 13 is T-shaped for easy guidance. An electric arc is generated during the process. Under the action of the magnetic blower permanent magnet 7, the electric arc is pushed and guided to the arc extinguishing hood 6 for arc extinguishing. As the gas hood 11 moves, the hole on the gas hood 11 aligns with the hole on the gas blowing cylinder 10, causing the gas in the gas blowing cylinder 10 to be ejected, thus achieving gas blowing arc extinguishing. This allows for manual or automatic power cut-off while extinguishing the arc through magnetic blowing and gas blowing, preventing arc damage, improving arc extinguishing efficiency, reducing the risk of accidents, and ensuring safe and convenient use. Then, the rotating shaft 2 is rotated in the opposite direction to make the first contact 3 contact the second contact 4 for energization, or to de-energize the electromagnetic coil 15, causing the spring 14 to rebound and the slide rod 9 to move in the opposite direction to reset, thus making the gas hood 11 and the limiting block 12 move in the opposite direction to reset. Then, the rotating shaft 2 is rotated in the opposite direction to make the first contact 3 contact the second contact 4 for energization.

[0025] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-efficiency arc-extinguishing device for molded case circuit breakers based on a combination of magnetic blowing and air blowing, characterized in that: It includes a plastic shell (1), a rotating shaft (2), a first contact (3), a second contact (4), an arc extinguishing chamber (5), an arc extinguishing cover (6), a magnetic blow permanent magnet (7), a power-off component, and an air blowing component. The lower part of the plastic shell (1) is rotatably connected to the rotating shaft (2), and the first contact (3) is connected to the rotating shaft (2). The upper right part of the plastic shell (1) is connected to the arc extinguishing chamber (5), and the lower left part of the arc extinguishing chamber (5) is connected to the second contact (4). The second contact (4) is in contact with the first contact (3). The right part of the arc extinguishing chamber (5) is connected to the arc extinguishing cover (6), and the left part of the arc extinguishing chamber (5) is connected to the magnetic blow permanent magnet (7). The plastic shell (1) is provided with a power-off component for power-off, and the lower left part of the plastic shell (1) is provided with an air blowing component for extinguishing the arc.

2. The high-efficiency arc-extinguishing device for molded case circuit breakers based on the combination of magnetic blowing and air blowing as described in claim 1, characterized in that: The power-off assembly includes a fixing plate (8), a sliding rod (9), a sleeve (13), a spring (14), and an electromagnetic coil (15). The fixing plate (8) is connected to the lower right left side of the arc-extinguishing chamber (5), and the sleeve (13) is connected to the lower right side of the plastic shell (1). The sliding rod (9) is slidably connected to the sleeve (13). The sliding rod (9) is slidably connected to the fixing plate (8). The spring (14) is connected between the sliding rod (9) and the sleeve (13). The electromagnetic coil (15) is connected to the outside of the sleeve (13).

3. The high-efficiency arc-extinguishing device for molded case circuit breakers based on the combination of magnetic blowing and air blowing as described in claim 2, characterized in that: The fixing piece (8) is L-shaped.

4. The high-efficiency arc-extinguishing device for molded case circuit breakers based on the combination of magnetic blowing and air blowing as described in claim 2, characterized in that: The sleeve (13) is T-shaped.

5. The high-efficiency arc-extinguishing device for molded case circuit breakers based on the combination of magnetic blowing and air blowing as described in claim 1, characterized in that: The air blowing assembly includes an air blowing cylinder (10), an air cover (11), and a limiting block (12). The air blowing cylinder (10) is connected to the lower left of the plastic shell (1), and the air cover (11) is slidably connected to the right side of the air blowing cylinder (10). The air cover (11) is connected to the slide rod (9), and the limiting block (12) is connected to the right side of the air cover (11).

6. The high-efficiency arc-extinguishing device for molded case circuit breakers based on the combination of magnetic blowing and air blowing as described in claim 5, characterized in that: An air inlet is located on the left side of the air-blowing cylinder (10).

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