High-safety miniature circuit breaker

Abstract

The utility model provides a high safety miniature circuit breaker, which comprises a mounting rack and a plurality of circuit breaker main bodies, the upper side of the mounting rack is hinged with a protection frame, a driving mechanism used for driving the protection frame to rotate is fixedly connected to one side of the mounting rack, and two sides of the mounting frame are respectively and oppositely provided with two heat dissipation mechanisms. A temperature sensor is arranged on the inner side wall of the mounting frame, when the circuit breaker main body works, the temperature sensor monitors the temperature in the protection frame in real time, when the temperature in the protection frame rises to a preset value, the temperature sensor generates an electric signal and the electric signal is received by the controller, and the controller sends an instruction to a driver of the cooling fan to enable the driver to rotate; the heat dissipation performance of the equipment is effectively guaranteed, the mounting frame is connected with the mounting groove through magnetic attraction, the filter plate is connected with the mounting frame through magnetic attraction, the heat dissipation fan and the filter plate can be conveniently detached, a user can regularly detach the heat dissipation fan and the filter plate, accumulated dust and dirt are removed, and it is guaranteed that the heat dissipation performance of the equipment is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker equipment, in particular to a high-safety miniature circuit breaker. Background Art

[0002] A circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions and can close, carry and disconnect current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. The boundary between high and low voltage is relatively vague. Generally, those above 3kV are called high-voltage electrical appliances. In the generation, transmission and use of electricity, power distribution is an extremely important link. A small circuit breaker, also known as a miniature circuit breaker, is a switching device used to protect circuit systems. It is suitable for overload and short-circuit protection of AC 50 / 60Hz rated voltage 230 / 400V and rated current up to 63A lines. It can also be used for infrequent operation conversion of lines under normal circumstances. Small circuit breakers are mainly used in various places such as industry, commerce, high-rise and residential buildings.

[0003] A circuit breaker generally includes a mounting frame and a circuit breaker body. When installing the circuit breaker body, the circuit breaker body is mostly inserted into the guide rail of the mounting frame, and the circuit breaker body and the mounting frame are fixed by bolts. In order to prevent the circuit breaker body from being exposed to the external environment and affected by external factors such as dust, moisture, corrosive gases, etc., a protective frame is generally provided on the outside for protection. However, the existing circuit breaker protective frame is generally only provided with heat dissipation holes, and the air flow effect inside the protective frame is poor. The heat generated by the circuit breaker when working for a long time may cause poor heat dissipation effect, and the temperature inside the protective frame will rise. Long-term high-temperature operation may accelerate the aging of the internal materials and insulating parts of the circuit breaker body, which not only affects the performance of the circuit breaker but also increases the risk of electrical failure.

[0004] Therefore, it is necessary to provide a new high-safety miniature circuit breaker to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a high-safety miniature circuit breaker.

[0006] The high-safety miniature circuit breaker provided by the utility model comprises: a mounting frame and a plurality of circuit breaker bodies arranged on the mounting frame, a protection frame is hingedly connected to the upper side of the mounting frame, a driving mechanism for driving the protection frame to rotate is fixedly connected to one side of the mounting frame, two heat dissipation mechanisms are respectively arranged on both sides of the protection frame, and a temperature sensor is arranged on the inner side wall of the protection frame;

[0007] The heat dissipation mechanism comprises a mounting frame, a heat dissipation fan and a filter plate, a magnet frame is provided on one side of the mounting frame, the magnet frame matches the mounting groove provided on the side wall of the protection frame, a magnetic plate is provided on the inner wall of the mounting groove, the magnetic plate and the magnet frame are magnetically attracted, the heat dissipation fan is fixedly arranged on the inner side wall of the mounting frame, a magnetic strip is provided on the side of the mounting frame away from the protection frame, an iron strip is provided on the side wall of the filter plate, and the magnetic strip and the iron strip are magnetically attracted;

[0008] The cooling fans in the two cooling mechanisms are arranged in the same direction.

[0009] Preferably, the driving mechanism includes a mounting plate, a driving motor and a rotating rod, one side of the mounting plate is fixedly connected to one side of the mounting frame, one side of the driving motor is fixedly connected to one side of the mounting frame, the output end of the driving motor movably passes through the mounting plate and is fixedly connected to one end of the rotating rod, and both ends of the rotating rod are respectively fixedly passed through both sides of the protective frame.

[0010] Preferably, a plurality of bolt holes for fixing the mounting frame to a wall or equipment are equidistantly provided on both upper and lower sides of the mounting frame.

[0011] Preferably, both upper and lower sides of the circuit breaker body are provided with I-shaped slots, and one side of the mounting frame is provided with two L-shaped clips opposite to each other, and the ends of the L-shaped clips are adapted to the outer side walls of the I-shaped slots.

[0012] Preferably, four positioning shafts are respectively provided on the four corners of one side of the magnet frame, and the four positioning shafts are respectively matched with four positioning holes opened on the side wall of the magnetic plate.

[0013] Preferably, a plurality of heat dissipation holes are equidistantly arranged on the top side of the protection frame, and the cross-sections of the plurality of heat dissipation holes in the vertical direction are in the shape of inclined strips.

[0014] Preferably, a transparent plate is provided on the front side of the mounting frame.

[0015] Compared with the related art, the high-safety miniature circuit breaker provided by the utility model has the following beneficial effects:

[0016] The utility model provides a high-safety small circuit breaker. When the circuit breaker body on the mounting frame is installed, replaced or maintained, the driving mechanism can be started, and the protection frame rotates under the action of the driving mechanism, so that the protection frame is in an open state. After the installation, replacement or maintenance of the circuit breaker body is completed, the driving mechanism is controlled to close the protection frame to protect the circuit breaker body. When the circuit breaker body is working, the temperature sensor monitors the temperature in the protection frame in real time. When the temperature in the protection frame rises to a preset value, the temperature sensor generates an electrical signal and is received by the controller. The controller sends an instruction to the driver of the cooling fan to rotate it, which effectively ensures the heat dissipation performance of the equipment. The mounting frame and the mounting slot, the filter plate and the mounting frame are all connected by magnetic attraction, so the cooling fan and the filter plate can be easily disassembled. The user can regularly disassemble the cooling fan and the filter plate to remove accumulated dust and dirt, ensuring that the heat dissipation performance of the equipment is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the high-safety miniature circuit breaker provided by the utility model;

[0018] Figure 2 A schematic diagram of an open state of a high-safety miniature circuit breaker provided by the utility model;

[0019] Figure 3 A schematic diagram of the structural disassembly of a high-safety miniature circuit breaker provided by the utility model;

[0020] Figure 4 A schematic diagram of the mounting frame and the circuit breaker body provided by the utility model;

[0021] Figure 5 A schematic diagram of the disassembly of the protective frame and the heat dissipation mechanism provided by the utility model;

[0022] Figure 6 This is a schematic diagram of the cross-sectional structure of the protection frame provided by the utility model.

[0023] Numbers in the figure: 1. Mounting frame; 2. Circuit breaker body; 3. Protection frame; 4. Mounting frame; 5. Cooling fan; 6. Filter plate; 7. Magnet frame; 8. Mounting slot; 9. Magnetic plate; 10. Temperature sensor; 11. Mounting plate; 12. Magnetic strip; 13. Iron strip; 14. Driving motor; 15. Rotating rod; 16. Positioning shaft; 17. Positioning hole; 18. Heat dissipation hole; 19. Transparent plate; 20. I-shaped slot; 21. L-shaped card plate. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0025] Please refer to Figure 1-Figure 6 ,in, Figure 1 This is a schematic diagram of the overall structure of the high-safety miniature circuit breaker provided by the utility model; Figure 2 A schematic diagram of an open state of a high-safety miniature circuit breaker provided by the utility model; Figure 3 A schematic diagram of the structural disassembly of a high-safety miniature circuit breaker provided by the utility model;

[0026] Figure 4 A schematic diagram of the mounting frame and the circuit breaker body provided by the utility model; Figure 5 A schematic diagram of the disassembly of the protective frame and the heat dissipation mechanism provided by the utility model; Figure 6 This is a schematic diagram of the cross-sectional structure of the protection frame provided by the utility model.

[0027] In the specific implementation process, Figure 1-Figure 6 As shown, the high-safety small circuit breaker includes a mounting frame 1 and a plurality of circuit breaker bodies 2 arranged on the mounting frame 1, a protective frame 3 is hinged on the upper side of the mounting frame 1, a driving mechanism for driving the protective frame 3 to rotate is fixedly connected to one side of the mounting frame 1, two heat dissipation mechanisms are respectively arranged on both sides of the protective frame 3, a temperature sensor 10 is arranged on the inner wall of the protective frame 3, the heat dissipation mechanism includes a mounting frame 4, a heat dissipation fan 5 and a filter plate 6, a magnet frame 7 is arranged on one side of the mounting frame 4, the magnet frame 7 matches the mounting groove 8 opened on the side wall of the protective frame 3, a magnetic plate 9 is arranged on the inner wall of the mounting groove 8, the magnetic plate 9 and the magnet frame 7 are magnetically attracted, the heat dissipation fan 5 is fixedly arranged on the inner wall of the mounting frame 4, a magnetic strip 12 is arranged on the side of the mounting frame 4 away from the protective frame 3, an iron strip 13 is arranged on the side wall of the filter plate 6, the magnetic strip 12 and the iron strip 13 are magnetically attracted, and the heat dissipation in the two heat dissipation mechanisms The heat fans 5 are all set in the same direction. When the circuit breaker body 2 is working, the temperature sensor 10 monitors the temperature in the protection frame 3 in real time. When the temperature in the protection frame 3 rises to a preset value, the temperature sensor 10 generates an electrical signal and is received by the controller. The controller sends a command to the driver of the heat dissipation fan 5 to rotate it. The two heat dissipation fans 5 jointly push the air to flow in the same direction, effectively taking away the heat from the protection frame 3. The setting of the filter plate 6 prevents external foreign matter, such as dust, insects, etc. from entering the protection frame 3 to a certain extent. Four positioning shafts 16 are respectively provided on the four corners of one side of the magnet frame 7. The four positioning shafts 16 are respectively matched with the four positioning holes 17 opened on the side wall of the magnetic plate 9. The mounting frame 4 and the mounting slot 8, and the filter plate 6 and the mounting frame 4 are all connected by magnetic attraction. The user can disassemble the heat dissipation fan 5 and the filter plate 6 for cleaning or maintenance;

[0028] The driving mechanism includes a mounting plate 11, a driving motor 14 and a rotating rod 15. One side of the mounting plate 11 is fixedly connected to one side of the mounting frame 1, and one side of the driving motor 14 is fixedly connected to one side of the mounting frame 1. The output end of the driving motor 14 movably penetrates the mounting plate 11 and is fixedly connected to one end of the rotating rod 15. The two ends of the rotating rod 15 are respectively fixedly penetrated to the two sides of the protection frame 3. When the circuit breaker body 2 on the mounting frame 1 is installed, replaced or maintained, the driving motor 14 can be started, and the driving motor 14 drives the rotating rod 15 to rotate. The protection frame 3 rotates under the action of the rotating rod 15, so that the protection frame 3 is in an open state. After the installation, replacement or maintenance of the circuit breaker body 2 is completed, the driving motor 14 reverses to control the protection frame 3 to close to protect the circuit breaker body 2;

[0029] Multiple bolt holes for fixing the mounting frame 1 to a wall or equipment are equidistantly provided on both upper and lower sides of the mounting frame 1. I-shaped card slots 20 are provided on both upper and lower sides of the circuit breaker body 2. Two L-shaped card plates 21 are provided opposite to each other on one side of the mounting frame 1. The ends of the L-shaped card plates 21 are adapted to the outer side walls of the I-shaped card slots 20. When installing the circuit breaker body 2, the I-shaped card slots 20 on the circuit breaker body 2 are inserted into the L-shaped card plates 21 on the mounting plate 11 along one side of the mounting plate 11, and the circuit breaker body 2 and the mounting plate 11 are fixed by bolts;

[0030] The top side of the protection frame 3 is provided with a plurality of heat dissipation holes 18 at equal intervals in sequence. The cross-sections of the plurality of heat dissipation holes 18 in the vertical direction are in the shape of inclined strips. The inclined heat dissipation holes 18 can prevent external foreign matter, such as dust, small insects, etc., from falling directly into the protection frame 3 to a certain extent. A transparent plate 19 is provided on the front side of the mounting frame 1. The transparent plate 19 enables the user to directly and clearly see the status of the circuit breaker body 2.

[0031] The circuit breaker body 1 mentioned above is a NXB-125 circuit breaker, which has the ability to automatically distinguish between slow-changing leakage and sudden-changing leakage (electric shock) for protection, thereby ensuring the safety of the circuit.

[0032] The working principle provided by the utility model is as follows: when the circuit breaker body 2 on the mounting frame 1 is installed, replaced or maintained, the driving motor 14 can be started, and the driving motor 14 drives the rotating rod 15 to rotate, and the protective frame 3 rotates under the action of the rotating rod 15, so that the protective frame 3 is in an open state. After the installation, replacement or maintenance of the circuit breaker body 2 is completed, the driving motor 14 reverses to control the protective frame 3 to close to protect the circuit breaker body 2. When the circuit breaker body 2 is working, the temperature sensor 10 monitors the temperature in the protective frame 3 in real time. When the temperature in the protective frame 3 rises to a preset value, the temperature sensor 10 generates an electrical signal and is received by the controller. The controller sends an instruction to the driver of the cooling fan 5 to rotate it, and the mounting frame 4 and the mounting slot 8, the filter plate 6 and the mounting frame 4 are connected by magnetic attraction. The user can disassemble the cooling fan 5 and the filter plate 6 for cleaning or maintenance.

[0033] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0034] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. High-safety miniature circuit breaker, characterized in that: include: A mounting frame (1) and a plurality of circuit breaker bodies (2) arranged on the mounting frame (1), a protection frame (3) being hingedly connected to the upper side of the mounting frame (1), a driving mechanism for driving the protection frame (3) to rotate being fixedly connected to one side of the mounting frame (1), two heat dissipation mechanisms being arranged opposite to each other on both sides of the protection frame (3), and a temperature sensor (10) being arranged on the inner side wall of the protection frame (3); The heat dissipation mechanism comprises a mounting frame (4), a heat dissipation fan (5) and a filter plate (6); a magnet frame (7) is provided on one side of the mounting frame (4); the magnet frame (7) matches a mounting groove (8) provided on the side wall of the protection frame (3); a magnetic plate (9) is provided on the inner wall of the mounting groove (8); the magnetic plate (9) and the magnet frame (7) are magnetically attracted to each other; the heat dissipation fan (5) is fixedly arranged on the inner wall of the mounting frame (4); a magnetic strip (12) is provided on the side of the mounting frame (4) away from the protection frame (3); an iron strip (13) is provided on the side wall of the filter plate (6); the magnetic strip (12) and the iron strip (13) are magnetically attracted to each other; The cooling fans (5) in the two cooling mechanisms are arranged in the same direction.

2. The high-safety miniature circuit breaker according to claim 1, characterized in that: The driving mechanism comprises a mounting plate (11), a driving motor (14) and a rotating rod (15); one side of the mounting plate (11) is fixedly connected to one side of the mounting frame (1); one side of the driving motor (14) is fixedly connected to one side of the mounting frame (1); an output end of the driving motor (14) movably passes through the mounting plate (11) and is fixedly connected to one end of the rotating rod (15); and two ends of the rotating rod (15) are respectively fixedly connected to two sides of the protective frame (3).

3. The high-safety miniature circuit breaker according to claim 2, characterized in that: A plurality of bolt holes for fixing the mounting frame (1) to the wall are equidistantly provided on both upper and lower sides of the mounting frame (1).

4. The high-safety miniature circuit breaker according to claim 3, characterized in that: The upper and lower sides of the circuit breaker body (2) are both provided with I-shaped slots (20), and one side of the mounting frame (1) is provided with two L-shaped clips (21) opposite to each other, and the ends of the L-shaped clips (21) are adapted to the outer side walls of the I-shaped slots (20).

5. The high-safety miniature circuit breaker according to claim 4, characterized in that: Four positioning shafts (16) are respectively provided at the four corners of one side of the magnet frame (7), and the four positioning shafts (16) are respectively matched with four positioning holes (17) opened on the side wall of the magnetic plate (9).

6. The high-safety miniature circuit breaker according to claim 5, characterized in that: A plurality of heat dissipation holes (18) are arranged in sequence and at equal intervals on the top side of the protection frame (3); the vertical cross-sections of the plurality of heat dissipation holes (18) are in the shape of inclined strips.

7. The high-safety miniature circuit breaker according to claim 6, characterized in that: A transparent plate (19) is provided on the front side of the mounting frame (1).

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