Circuit breaker device with fireproof function and method

Abstract

The invention discloses a circuit breaker device with a fireproof function and a method, and relates to the technical field of circuit breaker fire prevention. The device comprises an insulating shell and an insulating auxiliary shell, the insulating shell and the insulating auxiliary shell are the same in specification, the insulating auxiliary shell is fixedly installed on one side of the insulating shell, a circuit breaker assembly and an active circuit breaking protection assembly which are used for protecting a circuit are arranged in the insulating shell, and the two ends of the insulating shell are each provided with an auxiliary clamping assembly used for limiting a wire. According to the invention, through the arrangement of the active circuit break protection assembly and a dual circuit break mechanism of component conventional short circuit protection and active temperature linkage protection, when the conventional short circuit protection mechanism is not triggered due to a fault, the electromagnetic coil continuously bears large current to generate joule heat, and after the temperature sensor monitors a supercritical temperature, the electromagnetic coil is switched on; a temperature control signal is transmitted to the active circuit breaking protection assembly to trigger the active circuit breaking protection assembly depending on a miniature electric telescopic rod, a lifting block and other structures, a turnover block is driven to turn over, a circuit is forcibly broken, and fire hazards caused by heating due to faults are effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breaker fire prevention, and in particular to a circuit breaker device and method with fire prevention function. Background Art

[0002] A circuit breaker is a switching device that can close, carry, and interrupt current under normal and abnormal circuit conditions. It can automatically cut off the circuit when a serious overload, short circuit, or undervoltage fault occurs in the circuit, thereby protecting equipment and preventing fire.

[0003] In daily use, if the internal trigger structure of the circuit breaker (such as the tripper, spring, connecting rod, etc.) fails due to aging, when the line is short-circuited, the short-circuit protection function will be directly lost or delayed. At this time, the short-circuit current continues to flow through the electromagnetic coil, and its instantaneous current can reach 10-20 times the rated value. Under the action of the internal resistance of the electromagnetic coil, Joule heat is quickly generated, causing the coil temperature to rise to above 600°C within seconds, far exceeding the ignition point of the insulation material, eventually causing carbonization of the insulation layer, fire of the wire, and even ignition of surrounding combustible materials to cause a fire. Secondly, when installing the wire, the insulation layer needs to be stripped off and connected to the circuit breaker terminal and fastened with bolts. However, under the influence of environmental factors such as vibration, thermal expansion and contraction, it is easy to loosen and move from the terminal, resulting in a reduction in contact area. The contact resistance suddenly increases from the initial 5mΩ to more than 50mΩ, seriously weakening the conductive performance and posing a safety hazard. To address the above problems, the inventors have proposed a circuit breaker device and method with fire prevention function to solve the above problems. Summary of the Invention

[0004] In order to solve the potential safety problems caused by fire due to circuit breaker protection failure and unstable wire connection, the present invention aims to provide a circuit breaker device and method with fire protection function.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: a circuit breaker device with fire protection function, comprising an insulating housing and an insulating auxiliary housing, wherein the insulating housing and the insulating auxiliary housing have the same specifications and are fixedly mounted on one side of the insulating housing. A circuit breaker assembly and an active circuit breaker protection assembly for protecting the circuit are respectively disposed inside the insulating housing, and auxiliary clamping assemblies for limiting the position of the wires are disposed at both ends of the insulating housing;

[0006] Preferably, the active circuit breaker protection component includes an insulating shell and two vertically symmetrically distributed rotating shafts, the insulating shell is fixedly installed in the insulating shell, the two rotating shafts are fixedly installed in the insulating shell, the outer walls of the two rotating shafts are both rotatably sleeved with flip blocks, the inner wall sliding sleeve of the insulating shell is provided with an insulating column that cooperates with the flip blocks, a protrusion that cooperates with the insulating column is horizontally inserted into the inside of the insulating shell, an auxiliary arc chamber that cooperates with the flip blocks is fixedly installed inside the insulating shell, the outer walls of the two flip blocks are fixed with metal conductive sheets, and the two metal conductive sheets are flexibly connected by a copper braided belt, and the inner wall of the insulating shell is far A return spring is provided on the inner wall away from the protrusion, and the two ends of the return spring are fixedly connected to the insulating column and the inner wall of the return spring respectively. A lifting block is provided for sliding in the vertical direction of the inner wall of the insulating auxiliary shell. The lifting block is trapezoidal. A guide block is fixedly connected to the inclined part of the outer wall of the lifting block, and the protrusion is slidably connected to the lifting block through the guide block, and the protrusion passes through the inner wall between the insulating shell and the insulating auxiliary shell. A micro-electric telescopic rod is fixedly installed on the inner wall of the insulating auxiliary shell, and the driving end of the micro-electric telescopic rod is fixedly connected to the bottom end of the lifting block. Two symmetrically distributed guide rails are fixedly installed on the inner wall of the insulating auxiliary shell, and the lifting block is slidably installed between the two guide rails.

[0007] Material toggling mechanism, its both ends are to be connected with the cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion. The swing arm ends up being connected with the swing arm end face, and the hook portion

[0008] Preferably, the circuit breaker assembly includes a bimetallic strip, a main arc chamber, an electromagnetic coil, a trigger structure and a connector. The bimetallic strip is installed at the bottom of the insulating shell, the main arc chamber is arranged on one side of the middle of the insulating shell, the electromagnetic coil and the trigger structure are installed on the other side of the middle of the insulating shell, the connector is installed above the electromagnetic coil, and the electromagnetic coil is connected to the metal conductive sheet on the flip block below through the connector.

[0009] A method used in a circuit breaker device with a fire protection function, comprising the following steps:

[0010] S1. First, install the circuit breaker in the corresponding installation position in the corresponding distribution cabinet. Then, strip the insulation layer of the wires and connect the two wires to the power side and load side terminals of the circuit breaker respectively. Use bolts of corresponding specifications to tighten them. Gently pull the wires to check the connection reliability and ensure that there is no looseness or false connection.

[0011] S2. Auxiliary clamping components are used to implement secondary limit clamping on the power side and load side wires, which not only limits the displacement of the wires, but also prevents excessive squeezing and damage to the wires, strengthens the connection stability, and resists the influence of vibration and external pulling;

[0012] S3. When the circuit is short-circuited, the large current causes the electromagnetic coil to generate strong electromagnetic force, triggering the tripping. The triggering structure drives the circuit breaker contacts to disconnect, quickly cutting off the short-circuit current and completing conventional fault protection. This is the short-circuit instantaneous protection response;

[0013] S4. When the short circuit continues or the operating conditions are abnormal, the electromagnetic coil generates Joule heat due to the large current, and the temperature rises sharply. When the temperature sensor detects that the temperature around the electromagnetic coil has reached the critical value, it immediately sends an electrical signal to the active circuit breaker protection component. After receiving the signal, the active circuit breaker protection component quickly cuts off the circuit to prevent the fault from expanding, thus realizing active protection response under short-circuit conditions.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention provides an active circuit breaker protection component, which has a dual circuit breaker mechanism of conventional short-circuit protection and active temperature linkage protection. When the conventional short-circuit protection mechanism is not triggered due to a fault, the electromagnetic coil continues to carry a large current to generate Joule heat. After the temperature sensor detects the supercritical temperature, it transmits the temperature control signal to the active circuit breaker protection component, triggering it to rely on the micro-electric telescopic rod, lifting block and other structures to drive the flip block to flip, forcibly disconnecting the circuit, filling the safety loophole of conventional protection failure, ensuring that the circuit is reliably disconnected under short-circuit conditions, and effectively avoiding the fire hazard caused by fault heating;

[0016] 2. The present invention provides an auxiliary clamping assembly, which allows the wires to be clamped and fixed by two clamping frames in the auxiliary clamping assembly close to each other on the basis of the connection of the circuit breaker terminals. This, in conjunction with the elastic self-locking mechanism, improves stability while optimizing installation efficiency.

[0017] 3. The present invention sets an active circuit-breaking protection component. The insulating column pushes the two flip blocks to flip synchronously, forcing the circuit to be disconnected. The arc generated at the moment of disconnection is guided along the metal guide plate into the auxiliary arc chamber and eliminated by the arc extinguishing mechanism in the chamber, thereby completing active protection against unconventional faults and avoiding the risks of contact welding, insulation carbonization and ignition of surrounding combustible materials caused by high-temperature arcs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall side section structure of the present invention;

[0021] Figure 3 Schematic diagram of the structure of the active circuit breaker protection component in the present invention;

[0022] Figure 4 Schematic diagram of the structure of the insulating column, the return spring and the protrusion in the present invention;

[0023] Figure 5 This is a partial exploded diagram of the structure of the active circuit breaker protection component in the present invention;

[0024] Figure 6 Schematic diagram of the structure of the lifting block and the guide rail in the present invention;

[0025] Figure 7 This is an exploded schematic diagram of the auxiliary clamping assembly structure in the present invention;

[0026] Figure 8 for Figure 2 A magnified schematic diagram of the structure at point A.

[0027] In the figure: 1. Insulating shell; 2. Insulating auxiliary shell; 3. Circuit breaker assembly; 301. Bimetallic strip; 302. Main arc chamber; 303. Electromagnetic coil; 304. Trigger structure; 305. Connector; 4. Active circuit breaker protection assembly; 401. Insulating sleeve; 402. Rotating shaft; 403. Flipping block; 404. Insulating column; 405. Reset spring; 406. Bump; 407. Auxiliary arc chamber; 408. Lifting block; 409. Micro electric telescopic rod; 410. Guide rail; 5. Auxiliary clamping assembly; 501. Sleeve; 502. Sliding frame; 503. Reset bolt; 504. Slide rail; 505. Clamping frame; 506. Connecting rod; 507. Moving block; 508. Metal elastic limit dial frame; 509. Limiting slot; 510. Return spring No. 1; 511. Guide rod; 512. Return spring No. 2. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Example: Figure 1-8 As shown, the present invention provides a technical solution: a circuit breaker device with fire protection function, including an insulating housing 1 and an insulating auxiliary housing 2, wherein the lifting block 408 is of the same specification as the insulating housing 1 and the insulating auxiliary housing 2, and the insulating auxiliary housing 2 is fixedly mounted on one side of the insulating housing 1. A circuit breaker assembly 3 and an active circuit breaker protection assembly 4 are respectively provided inside the insulating housing 1, and auxiliary clamping assemblies 5 for limiting the position of the wires are provided at both ends of the insulating housing 1;

[0030] The active circuit breaker protection assembly 4 includes an insulating housing 401 and two vertically symmetrically distributed rotating shafts 402. The insulating housing 401 is fixedly installed in the insulating housing 1. The two rotating shafts 402 are fixedly installed in the insulating housing 401. The outer walls of the two rotating shafts 402 are both rotatably sleeved with a flip block 403. The inner wall of the insulating housing 401 is slidably sleeved with an insulating column 404 that cooperates with the flip block 403. A protrusion 406 that cooperates with the insulating column 404 is inserted horizontally into the interior of the insulating housing 401.

[0031] The auxiliary clamping assembly 5 includes a sleeve 501 and a sliding frame 502. The sliding frame 502 is slidably installed inside the sleeve 501. A reset bolt 503 is slidably provided on the inner wall of the sliding frame 502. A metal elastic limit dial frame 508 is fixedly installed in the sliding frame 502. A limit groove 509 is provided at the top of the sleeve 501 for cooperating with the metal elastic limit dial frame 508. A moving block 507 is fixedly installed at one end of the sliding frame 502 away from the reset bolt 503, and connecting rods 506 are respectively rotatably provided at both ends of the moving block 507, and a clamping frame 505 is rotatably provided at the other end of the connecting rod 506, and the clamping frame 505 is slidably installed on the insulating shell 1.

[0032] By adopting the above technical solution, the active circuit breaker protection component 4 actively protects the circuit, and the auxiliary clamping component 5 performs secondary clamping and limiting fixation on the wire to ensure the stability of the circuit.

[0033] The lifting block 408 is positioned between the two circuit breaker assemblies 3, which include a bimetallic strip 301, a main arc chamber 302, an electromagnetic coil 303, a trigger structure 304, and a connector 305. The bimetallic strip 301 is mounted on the bottom of the insulating housing 1, the main arc chamber 302 is located on one side of the middle portion of the insulating housing 1, the electromagnetic coil 303 and the trigger structure 304 are mounted on the other side of the middle portion of the insulating housing 1, and the connector 305 is mounted above the electromagnetic coil 303. The electromagnetic coil 303 is connected to a metal conductive sheet on the lower flip block 403 via the connector 305. By providing the main arc chamber 302, when the contacts separate, a high-temperature arc is generated that enters the main arc chamber 302 and is quickly extinguished by the action of the main arc chamber 302.

[0034] By adopting the above technical solution, when the circuit is overloaded, the short-circuit protection function of the electromagnetic coil 303 triggers the trigger structure 304 to disconnect the circuit, thereby achieving automatic short-circuit protection.

[0035] The lifting block 408 is fixedly installed with an auxiliary arc chamber 407 inside the two insulating shells 1, which cooperates with the flip block 403. By setting the auxiliary arc chamber 407, when the flip block 403 flips and breaks the circuit, the generated arc will be introduced into the auxiliary arc chamber 407, and the arc will be divided, cooled and extinguished by structures such as arc extinguishing grids and gas-generating materials, thereby reducing the arc erosion on the contacts and improving the short-circuit breaking capacity of the circuit breaker. The outer walls of the two flip blocks 403 are fixed with metal conductive sheets, and the two metal conductive sheets are flexibly connected by a copper braided belt.

[0036] By adopting the above technical solution, the flip block 403 performs a mechanical flipping action during the opening and closing process while maintaining the continuity of the conductive path, thereby avoiding wire breakage or poor contact caused by mechanical movement of the rigid connection.

[0037] A return spring 405 is provided on the inner wall of the lifting block 408 on the side of the inner wall of the two insulating shells 401 away from the protrusion 406, and the two ends of the return spring 405 are fixedly connected to the insulating column 404 and the inner wall of the return spring 405 respectively.

[0038] By adopting the above technical solution, the elastic recovery characteristics of the reset spring 405 are utilized to push the insulating column 404 to move and reset.

[0039] A lifting block 408 is provided to enable the lifting block 408 to slide in the vertical direction on the inner walls of the two insulating auxiliary shells 2. The lifting block 408 is arranged in a trapezoidal shape. A guide block is fixedly connected to the inclined part of the outer wall of the lifting block 408, and the protrusion 406 is slidably connected to the lifting block 408 through the guide block, and the protrusion 406 passes through the inner wall between the insulating shell 1 and the insulating auxiliary shell 2.

[0040] By adopting the above technical solution, the lifting block 408 pushes the protrusion 406 to move laterally during the rising process.

[0041] The lifting block 408 is fixedly installed with a micro electric telescopic rod 409 on the inner walls of the two insulating auxiliary shells 2, and the driving end of the micro electric telescopic rod 409 is fixedly connected to the bottom end of the lifting block 408. Two symmetrically distributed guide rails 410 are fixedly installed on the inner wall of the insulating auxiliary shell 2, and the lifting block 408 is slidably installed between the two guide rails 410. By setting up two guide rails 410, the lifting block 408 moves under the guidance of the two guide rails 410, thereby ensuring the stability of the lifting block 408 during the lifting and moving process.

[0042] By adopting the above technical solution, the micro electric telescopic rod 409 pushes the lifting block 408 to move up and down.

[0043] The lifting block 408 is fixedly mounted with a slide rail 504 on the outer wall of the two insulating shells 1 for use with the clamping frame 505 , and two adjacent clamping frames 505 are slidably mounted on the slide rail 504 .

[0044] By adopting the above technical solution, the two clamping frames 505 are moved under the guidance of the slide rails 504 , and the stability of the movement of the clamping frames 505 is ensured by the slide rails 504 .

[0045] The lifting block 408 is fixedly installed with a guide rod 511 in the middle of the two metal elastic limit dial frames 508, and the guide rod 511 is inserted into the corresponding slot in the reset bolt 503. The guide rod 511 guides the movement of the reset bolt 503 to ensure the stability of the movement of the reset bolt 503. The outer wall of the guide rod 511 is sleeved with a No. 2 return spring 512, and the two ends of the No. 2 return spring 512 are respectively fixedly connected to the reset bolt 503 and the metal elastic limit dial frame 508.

[0046] By adopting the above technical solution, the elastic recovery characteristics of the No. 2 return spring 512 are utilized to push the reset bolt 503 to slide and reset.

[0047] A No. 1 return spring 510 is sleeved on one end of the lifting block 408 on the outer wall of the two sliding frames 502 away from the reset bolt 503, and both ends of the No. 1 return spring 510 are fixedly connected to the reset bolt 503 and the inner wall of the sleeve 501 respectively.

[0048] By adopting the above technical solution, the elastic recovery characteristics of the No. 1 return spring 510 are utilized to push the sliding frame 502 back to the initial position.

[0049] A method used in a circuit breaker device with a fire protection function, comprising the following steps:

[0050] S1. First, install the circuit breaker in the corresponding installation position in the corresponding distribution cabinet. Then, strip the insulation layer of the wires and connect the two wires to the power side and load side terminals of the circuit breaker respectively. Use bolts of corresponding specifications to tighten them. Gently pull the wires to check the connection reliability and ensure that there is no looseness or false connection.

[0051] S2. Use the auxiliary clamping assembly 5 to implement secondary limit clamping on the power side and load side wires, which not only limits the displacement of the wires, but also avoids excessive squeezing and damage to the wires, strengthens the connection stability, and resists the influence of vibration and external pulling;

[0052] S3: When the circuit is short-circuited, the large current causes the electromagnetic coil 303 to generate a strong electromagnetic force, triggering the tripping. The trigger structure 304 drives the circuit breaker contacts to disconnect, quickly cutting off the short-circuit current and completing conventional fault protection. This is the short-circuit instantaneous protection response;

[0053] S4. When the short circuit continues or the operating condition is abnormal, the electromagnetic coil 303 generates Joule heat due to the large current, and the temperature rises sharply. When the temperature sensor detects that the temperature around the electromagnetic coil 303 reaches the critical value, it immediately sends an electrical signal to the active circuit breaker protection component 4. After receiving the signal, the active circuit breaker protection component 4 quickly cuts off the circuit to prevent the fault from expanding, thereby realizing active protection response under short-circuit conditions.

[0054] Working principle: In actual use, connect the wires to the power side and load side terminals of the circuit breaker respectively. Figure 7 、 Figure 8 As shown, at this time, the auxiliary clamping assembly 5 is in a relaxed state. When clamping is required, the reset bolt 503 is manually pressed. At this time, the reset bolt 503 moves under the guidance of the guide rod 511 and squeezes the No. 2 return spring 512. During the movement of the reset bolt 503, since the contact point between the reset bolt 503 and the metal elastic limit dial frame 508 is inclined, the reset bolt 503 drives the metal elastic limit dial frame 508 to move downward, so that the top protrusion of the metal elastic limit dial frame 508 disengages from the limit groove 509, and the sliding frame 502 is pushed to reset under the action of the No. 1 return spring 510. At this time, the metal elastic limit dial frame 50 The top protrusion 8 is located on the inner wall of the sleeve 501, the sliding frame 502 is reset, and the moving block 507 is pulled to move to the side of the sleeve 501. The moving block 507 drives the two clamping frames 505 to move closer to each other through the two connecting rods 506 to clamp and fix the wire. When the wire needs to be replaced, the sliding frame 502 is pressed to move to the side of the slide rail 504. Under the action of the sliding frame 502, the top protrusion of the metal elastic limit dial frame 508 is synchronously moved to the limit groove 509 for limit. In this process, the sliding frame 502 drives the two clamping frames 505 to move away from each other through the moving block 507 and the connecting rod 506 to release the limit on the wire.

[0055] Under normal short-circuit conditions, a large current acts on the electromagnetic coil 303 to generate a strong electromagnetic force, triggering the tripping process. The triggering structure 304 drives the circuit breaker contacts to quickly interrupt the short-circuit current. The arc generated at the moment of interruption is guided along the metal guide plate to the main arc chamber 302 and eliminated by the arc extinguishing mechanism inside the chamber, thus completing conventional fault protection and forming a short-circuit instantaneous protection response.

[0056] If the short circuit continues or the abnormal working condition occurs, the electromagnetic coil 303 and the trigger structure 304 do not trigger the trip. The electromagnetic coil 303 generates Joule heat due to the large current, and the temperature rises sharply. When the temperature sensor detects that the temperature around the electromagnetic coil 303 reaches the critical value, it immediately sends an electrical signal to the active circuit breaker protection component 4. After the active circuit breaker protection component 4 receives the signal, if Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the driving end of the micro electric telescopic rod 409 is controlled to extend and push the lifting block 408 to rise vertically. The lifting block 408 pushes the protrusion 406 to move in the insulating shell 401. During the movement of the protrusion 406, it pushes the insulating column 404 to move through the inclined part and squeezes the reset spring 405. The insulating column 404 pushes the two flip blocks 403 to flip synchronously, so that the circuit is disconnected and the arc generated at the moment of breaking is guided along the metal guide plate into the auxiliary arc chamber 407, and is eliminated by the arc extinguishing mechanism in the chamber, thereby completing the active protection against unconventional faults. When power is needed, it is only necessary to control the driving end of the micro electric telescopic rod 409 to retract.

[0057] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A circuit breaker device with fire protection function, comprising an insulating housing (1) and an insulating auxiliary housing (2), characterized in that: The insulating housing (1) and the insulating auxiliary housing (2) have the same specifications, and the insulating auxiliary housing (2) is fixedly mounted on one side of the insulating housing (1). A circuit breaker assembly (3) and an active circuit breaker protection assembly (4) for protecting the circuit are respectively provided inside the insulating housing (1), and auxiliary clamping assemblies (5) for limiting the position of the electric wire are provided at both ends of the insulating housing (1); The active circuit breaker protection component (4) comprises an insulating casing (401) and two vertically symmetrically distributed rotating shafts (402); the insulating casing (401) is fixedly mounted in the insulating outer shell (1); the two rotating shafts (402) are fixedly mounted in the insulating casing (401); the outer walls of the two rotating shafts (402) are both rotatably sleeved with a flip block (403); the inner wall of the insulating casing (401) is slidably sleeved with an insulating column (404) for use in conjunction with the flip block (403); and a protrusion (406) for use in conjunction with the insulating column (404) is transversely inserted into the interior of the insulating casing (401); The auxiliary clamping assembly (5) comprises a sleeve (501) and a sliding frame (502), wherein the sliding frame (502) is slidably mounted inside the sleeve (501), a reset bolt (503) is slidably provided on the inner wall of the sliding frame (502), a metal elastic limit dial frame (508) is fixedly mounted in the sliding frame (502), a limit groove (509) for use in conjunction with the metal elastic limit dial frame (508) is provided at the top end of the sleeve (501), a moving block (507) is fixedly mounted at one end of the sliding frame (502) away from the reset bolt (503), and connecting rods (506) are rotatably provided at both ends of the moving block (507), and a clamping frame (505) is rotatably provided at the other end of the connecting rod (506), and the clamping frame (505) is slidably mounted on the insulating housing (1).

2. A circuit breaker device with fire protection function according to claim 1, characterized in that: The circuit breaker assembly (3) comprises a bimetallic strip (301), a main arc chamber (302), an electromagnetic coil (303), a trigger structure (304) and a connector (305); the bimetallic strip (301) is mounted on the bottom of the insulating housing (1); the main arc chamber (302) is located on one side of the middle of the insulating housing (1); the electromagnetic coil (303) and the trigger structure (304) are mounted on the other side of the middle of the insulating housing (1); the connector (305) is mounted above the electromagnetic coil (303); and the electromagnetic coil (303) is connected to a metal conductive sheet on a flip block (403) located below via the connector (305).

3. A circuit breaker device with fire protection function according to claim 1, characterized in that: An auxiliary arc chamber (407) that cooperates with the flip block (403) is fixedly installed inside the insulating housing (1); metal conductive sheets are fixedly provided on the outer walls of the two flip blocks (403), and the two metal conductive sheets are flexibly connected via a copper braid.

4. A circuit breaker device with fire protection function according to claim 1, characterized in that: A reset spring (405) is provided on the inner wall of the insulating housing (401) at a side away from the protrusion (406), and two ends of the reset spring (405) are fixedly connected to the insulating column (404) and the inner wall of the reset spring (405), respectively.

5. A circuit breaker device with fire protection function according to claim 1, characterized in that: A lifting block (408) is provided on the inner wall of the insulating auxiliary shell (2) for sliding in the vertical direction. The lifting block (408) is arranged in a trapezoidal shape. A guide block is fixedly connected to the inclined portion of the outer wall of the lifting block (408). The protrusion (406) is slidably connected to the lifting block (408) via the guide block, and the protrusion (406) passes through the inner wall between the insulating outer shell (1) and the insulating auxiliary shell (2).

6. A circuit breaker device with fire protection function according to claim 1, characterized in that: A micro electric telescopic rod (409) is fixedly mounted on the inner wall of the insulating auxiliary shell (2), and a driving end of the micro electric telescopic rod (409) is fixedly connected to the bottom end of the lifting block (408). Two symmetrically distributed guide rails (410) are fixedly mounted on the inner wall of the insulating auxiliary shell (2), and the lifting block (408) is slidably mounted between the two guide rails (410).

7. A circuit breaker device with fire protection function according to claim 1, characterized in that: A slide rail (504) that cooperates with the clamping frame (505) is fixedly mounted on the outer wall of the insulating shell (1), and two adjacent clamping frames (505) are slidably mounted on the slide rail (504).

8. A circuit breaker device with fire protection function as claimed in claim 1, characterized in that: A guide rod (511) is fixedly installed in the middle of the metal elastic limit dial frame (508), and the guide rod (511) is inserted into the corresponding notch in the reset bolt (503). A second return spring (512) is sleeved on the outer wall of the guide rod (511), and the two ends of the second return spring (512) are fixedly connected to the reset bolt (503) and the metal elastic limit dial frame (508) respectively.

9. A circuit breaker device with fire protection function as claimed in claim 1, characterized in that: A No. 1 return spring (510) is sleeved on one end of the outer wall of the sliding frame (502) away from the reset bolt (503), and both ends of the No. 1 return spring (510) are fixedly connected to the reset bolt (503) and the inner wall of the sleeve (501) respectively.

10. The method used in a circuit breaker device with fire protection function according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. First, install the circuit breaker in the corresponding installation position in the corresponding distribution cabinet. Then, strip the insulation layer of the wires and connect the two wires to the power side and load side terminals of the circuit breaker respectively. Use bolts of corresponding specifications to tighten them. Gently pull the wires to check the connection reliability and ensure that there is no looseness or false connection. S2. A secondary limit clamping is performed on the power supply side and the load side wires respectively through the auxiliary clamping component (5), which not only limits the displacement of the wires, but also avoids excessive squeezing and damage to the wires, strengthens the connection stability, and resists the influence of vibration and external pulling; S3, when the circuit is short-circuited, the large current causes the electromagnetic coil (303) to generate a strong electromagnetic force, triggering the tripping, and driving the circuit breaker contacts to disconnect through the trigger structure (304), quickly cutting off the short-circuit current and completing the conventional fault protection. This is the short-circuit instantaneous protection response; S4. When the short circuit continues or the operating condition is abnormal, the electromagnetic coil (303) generates Joule heat due to the large current, and the temperature rises sharply. When the temperature sensor detects that the temperature around the electromagnetic coil (303) reaches the critical value, it immediately sends an electrical signal to the active circuit breaker protection component (4). After receiving the signal, the active circuit breaker protection component 4 quickly cuts off the circuit to prevent the fault from expanding, thereby achieving active protection response under the short circuit condition.

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