A circuit breaker device and method with fire protection function

Abstract

The application discloses a circuit breaker device and method with a fireproof function, and relates to the technical field of circuit breaker fireproofing. The application comprises an insulating shell and an insulating auxiliary shell, wherein the insulating shell and the insulating auxiliary shell have the same specifications, 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 of a protection circuit are arranged in the insulating shell, and auxiliary clamping assemblies for limiting electric wires are arranged at both ends of the insulating shell. The active circuit breaking protection assembly is arranged, a double circuit breaking mechanism of a conventional short circuit protection mechanism and an active temperature linkage protection mechanism is formed, when the conventional short circuit protection mechanism is not triggered due to a fault, an electromagnetic coil continuously bears a large current to generate Joule heat, after a temperature sensor detects a supercritical temperature, a temperature control signal is transmitted to the active circuit breaking protection assembly, a micro electric telescopic rod, a lifting block and other structures are triggered, a turnover block is driven to turn over, a circuit is forced to break, and a fire hazard caused by a fault heat is effectively avoided.

Description

TECHNICAL FIELD

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

[0002] The circuit breaker is a kind of switch device that can be closed, carried and opened under normal and abnormal circuit conditions, and can automatically cut off the circuit when serious overload, short circuit or under-voltage fault occurs in the circuit, thereby protecting the equipment and preventing fire;

[0003] In daily use, if the internal trigger structure (such as release, spring, connecting rod, etc.) of the circuit breaker fails due to aging, when the line is short-circuited, the short-circuit protection function will be lost or delayed, at this time, the short-circuit current continuously flows through the electromagnetic coil, and the instantaneous current can reach 10-20 times of the rated value, which rapidly generates Joule heat under the action of the internal resistance of the electromagnetic coil, and the temperature of the coil rises to more than 600 DEG C within a few seconds, far exceeding the ignition point of the insulating material, eventually causing carbonization of the insulating layer, ignition of the wire, and even ignition of the surrounding combustible materials, causing a fire. Secondly, when the wire is installed, the insulating layer needs to be stripped and connected to the terminal of the circuit breaker and fastened with bolts, but under the action of environmental factors such as vibration, thermal expansion and cold contraction, it is easy to loosen and displace from the terminal, which reduces the contact area and increases the contact resistance from the initial 5 mΩ to more than 50 mΩ, seriously weakening the conductivity and hiding safety hazards. To solve the above problems, the present application provides a circuit breaker device with fire prevention function and a method. SUMMARY

[0004] In order to solve the problems of circuit breaker protection failure causing fire and unstable wire connection causing safety hazards, the present application aims to provide a circuit breaker device with fire prevention function and a method.

[0005] To solve the above technical problems, the present application adopts the following technical scheme: a circuit breaker device with fire prevention function, comprising an insulating shell and an insulating auxiliary shell, the insulating shell and the insulating auxiliary shell are of the same size, and the insulating auxiliary shell is fixedly installed on one side of the insulating shell, the insulating shell is provided with a circuit breaker assembly and a active circuit breaker protection assembly for protecting the circuit respectively, and the insulating shell is provided with an auxiliary clamping assembly for limiting the electric wire at both ends;

[0006] Preferably, the active circuit protection assembly comprises an insulating sleeve shell and two vertically symmetrical rotating shafts, the insulating sleeve shell is fixedly installed in the insulating shell, the two rotating shafts are fixedly installed in the insulating sleeve shell, the outer wall of the two rotating shafts is rotatably sleeved with a turnover block, the inner wall of the insulating sleeve shell is slidably sleeved with an insulating column which is used in cooperation with the turnover block, a protrusion which is used in cooperation with the insulating column is transversely inserted in the insulating sleeve shell, an auxiliary arc chamber which is used in cooperation with the turnover block is fixedly installed in the insulating shell, the outer wall of each of the two turnover blocks is fixedly provided with a metal conductive sheet, the two metal conductive sheets are connected in softness through a copper braid, a reset spring is arranged on the inner wall of the insulating sleeve shell away from the protrusion, and the two ends of the reset spring are fixedly connected with the insulating column and the inner wall of the reset spring respectively, a lifting block is slidably arranged on the inner wall of the insulating auxiliary shell in the vertical direction, the lifting block is arranged in a trapezoidal shape, a guide block is fixedly connected to the outer wall of the lifting block at an inclined position, the protrusion is slidably connected with the lifting block through the guide block, and the protrusion penetrates 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 with 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] Preferably, the auxiliary clamping assembly comprises a sleeve and a sliding frame, the sliding frame is slidably installed in the sleeve, a reset pin is slidably arranged on the inner wall of the sliding frame, a metal elastic limiting push frame is fixedly installed in the sliding frame, a limiting groove which is used in cooperation with the metal elastic limiting push frame is formed in the top end of the sleeve, a moving block is fixedly installed at the end of the sliding frame away from the reset pin, connecting rods are rotatably arranged at the two ends of the moving block respectively, a clamping frame is rotatably arranged at the other end of each connecting rod, the clamping frame is slidably installed on the insulating shell, slide rails which are used in cooperation with the clamping frame are fixedly installed on the outer wall of the insulating shell, and adjacent two clamping frames are slidably installed on the slide rails, a guide rod is fixedly installed in the middle of the metal elastic limiting push frame, the guide rod is inserted in the corresponding slot of the reset pin, a No. 2 return spring is sleeved on the outer wall of the guide rod, and the two ends of the No. 2 return spring are fixedly connected with the reset pin and the metal elastic limiting push frame respectively, a No. 1 return spring is sleeved on the outer wall of the sliding frame away from the reset pin, and the two ends of the No. 1 return spring are fixedly connected with the reset pin and the inner wall of the sleeve respectively.

[0008] Preferably, the circuit breaker assembly comprises 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 at one side of the middle of the insulating shell, the electromagnetic coil and the trigger structure are installed at the other side of the middle of the insulating shell, the connector is installed above the electromagnetic coil, and the electromagnetic coil is connected with the metal conductive sheet on the turnover block below through the connector.

[0009] A method for a circuit breaker device with a fireproof function, comprising the following steps:

[0010] S1, first install the circuit breaker in the corresponding distribution cabinet corresponding to the installation position, then peel off the insulating layer of the wire, connect the two wires to the power supply side and the load side of the circuit breaker respectively, fasten them with corresponding specification bolts, and check the connection reliability by pulling the wire gently to ensure that there is no looseness or virtual connection;

[0011] S2, through the auxiliary clamping assembly, the power supply side and the load side of the wire are respectively implemented twice limit clamping, which not only limits the displacement of the wire, but also avoids excessive extrusion damage to the wire, strengthens the connection stability, and resists the influence of vibration and external force pulling;

[0012] S3, when the circuit is short-circuited, the strong electromagnetic force generated by the electromagnetic coil under the action of large current triggers the trip, drives the circuit breaker contact to break through the trigger structure, quickly cuts off the short-circuit current, and completes the conventional fault protection, which is the short-circuit instantaneous protection response;

[0013] S4, under the condition of short-circuit or abnormal working condition, the electromagnetic coil generates Joule heat due to large current, the temperature rises sharply, when the temperature sensor detects that the temperature around the electromagnetic coil reaches the critical value, it immediately sends an electric signal to the active circuit protection assembly, after receiving the signal, the active circuit protection assembly quickly cuts off the circuit to prevent the fault from expanding, and realizes the active protection response under the condition of short-circuit.

[0014] Compared with the prior art, the beneficial effects of the present application are:

[0015] 1, the active circuit protection assembly is arranged, the double circuit breaking mechanism of conventional short-circuit protection and active temperature linkage protection is formed, when the conventional short-circuit protection mechanism is not triggered due to failure, the electromagnetic coil continuously bears large current to generate Joule heat, after the temperature sensor detects the supercritical temperature, the temperature control signal is transmitted to the active circuit protection assembly, the flip block is flipped by relying on the micro electric telescopic rod, lifting block and other structures, the circuit is forced to break, the safety loophole of conventional protection failure is filled, the circuit can be reliably cut off under the condition of short-circuit, and the fire hazard caused by failure heating is effectively avoided;

[0016] 2, the auxiliary clamping assembly is arranged, the wire is clamped and fixed by the two clamping frames in the auxiliary clamping assembly on the basis of the connection of the circuit breaker terminal, and is coordinated with the elastic self-locking, the stability is improved, and the installation efficiency is optimized;

[0017] 3, the active circuit protection assembly is arranged, the two flip blocks are synchronously flipped by the insulating column, the circuit is forced to be disconnected, the electric arc generated in the disconnection moment is guided into the auxiliary arc chamber along the metal guide plate, and is eliminated by the arc extinguishing mechanism in the chamber, so that the active protection of the abnormal fault is completed, and the risk of contact welding, insulation carbonization and surrounding combustible ignition caused by high temperature arc is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0020] Figure 2 It is a schematic diagram of the overall side sectional structure of the present application.

[0021] Figure 3 It is a schematic diagram of the structure of the active circuit protection assembly in the present application.

[0022] Figure 4 It is a schematic diagram of the structure of the insulating column, reset spring and protruding block in the present application.

[0023] Figure 5 It is an exploded schematic diagram of the partial structure of the active circuit protection assembly in the present application.

[0024] Figure 6 It is a schematic diagram of the structure of the lifting block and guide rail in the present application.

[0025] Figure 7 It is an exploded schematic diagram of the structure of the auxiliary clamping assembly in the present application.

[0026] Figure 8 It is Figure 2 an enlarged schematic diagram of the structure at A in the present application.

[0027] In the figure: 1, insulating outer 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 protection assembly; 401, insulating sleeve; 402, rotating shaft; 403, overturning block; 404, insulating column; 405, reset spring; 406, protruding block; 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 pin; 504, sliding rail; 505, clamping frame; 506, connecting rod; 507, moving block; 508, metal elastic limiting push frame; 509, limiting groove; 510, No. 1 return spring; 511, guide rod; 512, No. 2 return spring. DETAILED DESCRIPTION

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example: Figures 1-8 As shown, the present invention provides a technical solution: a circuit breaker device with fireproof function, including an insulating outer shell 1 and an insulating auxiliary shell 2, such that the lifting block 408 is of the same specification as the two insulating outer shells 1 and the insulating auxiliary shell 2, and the insulating auxiliary shell 2 is fixedly installed on one side of the insulating outer shell 1. The insulating outer shell 1 is respectively provided with a circuit breaker assembly 3 for protecting the circuit and an active circuit breaking protection assembly 4. Both ends of the insulating outer shell 1 are provided with auxiliary clamping assemblies 5 for limiting the wire.

[0030] The active circuit breaking protection component 4 includes an insulating housing 401 and two vertically symmetrically distributed rotating shafts 402. The insulating housing 401 is fixedly installed inside the insulating outer shell 1, and the two rotating shafts 402 are fixedly installed in the insulating housing 401. The outer walls of the two rotating shafts 402 are rotatably fitted with flipping blocks 403. The inner wall of the insulating housing 401 is slidably fitted with insulating posts 404 that cooperate with the flipping blocks 403. The interior of the insulating housing 401 is transversely inserted with protrusions 406 that cooperate with the insulating posts 404.

[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 frame 508 is fixedly installed in the sliding frame 502. A limit groove 509 is provided at the top of the sleeve 501 to cooperate with the metal elastic limit frame 508. A moving block 507 is fixedly installed at one end of the sliding frame 502 away from the reset bolt 503. A connecting rod 506 is rotatably provided at both ends of the moving block 507. A clamping frame 505 is rotatably provided at the other end of the connecting rod 506. The clamping frame 505 is slidably installed on the insulating shell 1.

[0032] By adopting the above technical solution, the active circuit breaking 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 line.

[0033] The lifting block 408 is fixedly installed inside the two insulation housings 1 and is provided with auxiliary arc chambers 407 which are used in cooperation with the turnover blocks 403. The auxiliary arc chambers 407 are arranged to guide the arc into the auxiliary arc chambers 407 when the turnover blocks 403 are turned to break the circuit, and the arc is divided, cooled and extinguished by the arc extinguishing grids and gas generating materials, thereby reducing the ablation of the contacts by the arc and improving the short-circuit breaking capacity of the circuit breaker. The outer walls of the two turnover blocks 403 are fixedly provided with metal conductive sheets, and the two metal conductive sheets are connected by a copper braid.

[0034] By adopting the above technical scheme, 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 realizing automatic protection of short circuit.

[0035] The lifting block 408 is fixedly installed inside the two insulation housings 1 and is provided with auxiliary arc chambers 407 which are used in cooperation with the turnover blocks 403. The auxiliary arc chambers 407 are arranged to guide the arc into the auxiliary arc chambers 407 when the turnover blocks 403 are turned to break the circuit, and the arc is divided, cooled and extinguished by the arc extinguishing grids and gas generating materials, thereby reducing the ablation of the contacts by the arc and improving the short-circuit breaking capacity of the circuit breaker. The outer walls of the two turnover blocks 403 are fixedly provided with metal conductive sheets, and the two metal conductive sheets are connected by a copper braid.

[0036] By adopting the above technical scheme, the turnover block 403 performs mechanical turning action during the opening and closing process, and the continuity of the conductive path is maintained, thereby avoiding the breakage of the conductive wire or poor contact caused by the mechanical movement of the rigid connection.

[0037] The lifting block 408 is provided with a reset spring 405 on the inner wall of the two insulation sleeves 401 away from the inner wall of the protrusion 406, and the two ends of the reset spring 405 are fixedly connected with the insulation column 404 and the inner wall of the reset spring 405, respectively.

[0038] By adopting the above technical scheme, the reset spring 405 is used to push the insulation column 404 to move to the reset position by utilizing the elastic recovery characteristics of the reset spring 405.

[0039] The lifting block 408 is provided with a lifting block 408 which is vertically arranged on the inner wall of the two insulation auxiliary housings 2. The lifting block 408 is in the shape of a trapezoid, and the outer wall of the lifting block 408 is fixedly connected with a guide block at the inclined portion. The protrusion 406 is connected with the lifting block 408 through the guide block, and the protrusion 406 penetrates the inner wall between the insulation housing 1 and the insulation auxiliary housing 2.

[0040] By adopting the above technical scheme, the lifting block 408 pushes the protrusion 406 to move horizontally in the process of rising.

[0041] The micro electric telescopic rod 409 is fixedly installed on the inner wall of the two insulating auxiliary shells 2, and the driving end of the micro electric telescopic rod 409 is fixedly connected with the bottom end of the lifting block 408. The two symmetrical guide rails 410 are fixedly installed on the inner wall of the insulating auxiliary shell 2, and the lifting block 408 is slidingly installed between the two guide rails 410. By arranging the two guide rails 410, the lifting block 408 moves under the guidance of the two guide rails 410, so that the stability of the lifting block 408 during the lifting movement is ensured.

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

[0043] The sliding rail 504 used in cooperation with the clamping frame 505 is fixedly installed on the outer wall of the two insulating shells 1, and the adjacent two clamping frames 505 are slidingly installed on the sliding rail 504.

[0044] By adopting the above technical scheme, the two clamping frames 505 move under the guidance of the sliding rail 504, so that the stability of the movement of the clamping frame 505 is ensured by the sliding rail 504.

[0045] The guide rod 511 is fixedly installed in the middle of the two metal elastic limiting frames 508, and the guide rod 511 is inserted into the corresponding slot of the reset pin 503. By arranging the guide rod 511, the movement of the reset pin 503 is guided, so that the stability of the movement of the reset pin 503 is ensured. The No. 2 return spring 512 is sleeved on the outer wall of the guide rod 511, and the two ends of the No. 2 return spring 512 are fixedly connected with the reset pin 503 and the metal elastic limiting frame 508 respectively.

[0046] By adopting the above technical scheme, the reset pin 503 is slidingly reset by using the elastic recovery characteristics of the No. 2 return spring 512.

[0047] The No. 1 return spring 510 is sleeved on the outer wall of the two sliding frames 502 away from the reset pin 503, and the two ends of the No. 1 return spring 510 are fixedly connected with the reset pin 503 and the inner wall of the sleeve 501 respectively.

[0048] By adopting the above technical scheme, the sliding frame 502 is pushed back to the initial position by using the elastic recovery characteristics of the No. 1 return spring 510.

[0049] A method for a circuit breaker device with a fireproof function, comprising the following steps:

[0050] S1, first install the circuit breaker in the corresponding installation position of the corresponding power distribution cabinet, then peel off the insulating layer of the wire, connect the two wires to the power supply side and load side of the circuit breaker respectively, fasten with the corresponding specification bolts, and check the connection reliability by pulling the wire gently to ensure that there is no looseness or virtual connection.

[0051] S2, by the auxiliary clamping assembly 5, the power supply side, the load side wire respectively implements secondary limiting clamping, both limit wire displacement, and avoid excessive extrusion damage wire, strengthen the connection stability, resist the influence of vibration, external force pull;

[0052] S3, when the circuit is short-circuited, the strong electromagnetic force of the electromagnetic coil 303 is generated by the large current, the trip is triggered, the circuit breaker contact is driven to break through the trigger structure 304, the short-circuit current is quickly cut off, and the conventional fault protection is completed. This is the short-circuit transient protection response;

[0053] S4, under the condition of short-circuit or abnormal condition, the electromagnetic coil 303 generates Joule heat due to large current, the temperature rises sharply, when the temperature sensor detects that the temperature around the electromagnetic coil 303 reaches the critical value, immediately sends an electrical signal to the active circuit protection assembly 4, after receiving the signal, the active circuit protection assembly 4 quickly cuts off the circuit, prevents the fault from expanding, and realizes the active protection response under the condition of short-circuit.

[0054] Working principle: in actual use, the wire is connected to the circuit breaker power supply side and load side terminal respectively, as shown in Figure 7 、 Figure 8 When clamping is needed, the reset pin 503 is manually pressed, the reset pin 503 moves under the guidance of the guide rod 511 and extrudes the No. 2 return spring 512. During the movement of the reset pin 503, the contact point between the reset pin 503 and the metal elastic limiting lever 508 is inclined, and the metal elastic limiting lever 508 is moved downward, so that the top protrusion of the metal elastic limiting lever 508 is separated from the limiting groove 509. Under the action of the No. 1 return spring 510, the sliding frame 502 is reset, and the top protrusion of the metal elastic limiting lever 508 is located in the inner wall of the sleeve 501. The sliding frame 502 is reset, the moving block 507 is moved to one side of the sleeve 501, the moving block 507 drives the two clamping frames 505 to move close to each other through the two connecting rods 506, and the wire is clamped and fixed. When the wire needs to be replaced, the sliding frame 502 is pressed to move to one side of the slide rail 504, and the top protrusion of the metal elastic limiting lever 508 is moved to the limiting groove 509 under the action of the sliding frame 502. 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, and the wire is released from the limiting position;

[0055] Under normal short-circuit conditions, a large current acts on the electromagnetic coil 303 to generate a strong electromagnetic force, triggering the trip process, and the trigger structure 304 drives the circuit breaker contacts to quickly break the short-circuit current; the arc generated at the moment of breaking is guided along the metal guide plate to the main arc chamber 302, and is eliminated by the internal arc extinguishing mechanism, thereby completing the conventional fault protection and forming a short-circuit transient protection response.

[0056] If the short-circuit continues or is under abnormal conditions, the electromagnetic coil 303 and the trigger structure 304 do not trigger the trip, and the electromagnetic coil 303 generates Joule heat due to the large current, causing the temperature to rise sharply. When the temperature sensor detects that the temperature around the electromagnetic coil 303 reaches a critical value, it immediately sends an electrical signal to the active circuit breaking protection assembly 4. After receiving the signal, the active circuit breaking protection assembly 4 controls the micro electric telescopic rod 409 to extend and push the lifting block 408 to vertically rise, as shown in Figure 3 、 Figure 4 、 Figure 5 and Figure 6 , the lifting block 408 pushes the protrusion 406 to move in the insulating sleeve 401. During the movement of the protrusion 406, it pushes the insulating column 404 to move and compresses the return spring 405. The insulating column 404 pushes the two flip blocks 403 to synchronously flip, disconnecting the circuit, and the arc generated at the moment of breaking is guided along the metal guide plate to the auxiliary arc chamber 407, and is eliminated by the internal arc extinguishing mechanism, thereby completing the active protection of the abnormal fault. When power needs to be turned on, the micro electric telescopic rod 409 drive end only needs to be controlled to retract.

[0057] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A circuit breaker device with fire-resistant function, comprising an insulating outer shell (1) and an insulating auxiliary shell (2), characterized in that: The insulating outer shell (1) and the insulating auxiliary shell (2) are of the same specifications, and the insulating auxiliary shell (2) is fixedly installed on one side of the insulating outer shell (1). The insulating outer shell (1) is equipped with a circuit breaker assembly (3) and an active circuit breaking protection assembly (4) for protecting the circuit. Both ends of the insulating outer shell (1) are equipped with auxiliary clamping assemblies (5) for limiting the wire. The active circuit breaking protection component (4) includes an insulating housing (401) and two vertically symmetrically distributed rotating shafts (402). The insulating housing (401) is fixedly installed inside the insulating outer shell (1), and the two rotating shafts (402) are fixedly installed in the insulating housing (401). The outer walls of the two rotating shafts (402) are rotatably fitted with flipping blocks (403). The inner wall of the insulating housing (401) is slidably fitted with insulating posts (404) that cooperate with the flipping blocks (403). The interior of the insulating housing (401) is transversely inserted with protrusions (406) that cooperate with the insulating posts (404). 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 frame (508) is fixedly installed in the sliding frame (502). A limit groove (509) is opened at the top of the sleeve (501) to cooperate with the metal elastic limit frame (508). A moving block (507) is fixedly installed at one end of the sliding frame (502) away from the reset bolt (503). A connecting rod (506) is rotatably provided at both ends of the moving block (507). A clamping frame (505) is rotatably provided at the other end of the connecting rod (506). The clamping frame (505) is slidably installed on the insulating shell (1).

2. A circuit breaker device with fire-resistant function as described in claim 1, characterized in that, The circuit breaker assembly (3) includes 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 installed at 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 installed on the other side of the middle of the insulating housing (1). The connector (305) is installed above the electromagnetic coil (303), and the electromagnetic coil (303) is connected to the metal conductive sheet on the lower flip block (403) through the connector (305).

3. A circuit breaker device with fire-resistant function as described in claim 1, characterized in that, An auxiliary arc chamber (407) for use in conjunction with the flipping block (403) is fixedly installed inside the insulating shell (1). Metal conductive sheets are fixedly provided on the outer walls of the two flipping blocks (403), and the two metal conductive sheets are flexibly connected by copper braided strips.

4. A circuit breaker device with fire-resistant function as described in claim 1, characterized in that, The inner wall of the insulating sleeve (401) away from the protrusion (406) is provided with a return spring (405), and the two ends of the return spring (405) are fixedly connected to the insulating post (404) and the inner wall of the return spring (405) respectively.

5. A circuit breaker device with fire-resistant function as described in claim 1, characterized in that, The inner wall of the insulating auxiliary shell (2) is provided with a lifting block (408) in the vertical direction. The lifting block (408) is trapezoidal. A guide block is fixedly connected to the inclined part of the outer wall of the lifting block (408). The protrusion (406) is slidably connected to the lifting block (408) through the guide block. The protrusion (406) penetrates the inner wall between the insulating outer shell (1) and the insulating auxiliary shell (2).

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

7. A circuit breaker device with fire-resistant function as described in claim 1, characterized in that, The outer wall of the insulating shell (1) is fixedly installed with a slide rail (504) that cooperates with the clamping frame (505), and two adjacent clamping frames (505) are slidably installed on the slide rail (504).

8. A circuit breaker device with fire protection function as described in claim 1, characterized in that, A guide rod (511) is fixedly installed in the middle of the metal elastic limiting frame (508), and the guide rod (511) is inserted into the corresponding slot 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 limiting frame (508) respectively.

9. A circuit breaker device with fire protection function as described in claim 1, characterized in that, A return spring (510) is sleeved on the outer wall of the sliding frame (502) at the end away from the reset bolt (503), and the two ends of the 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 fire-resistant circuit breaker device as described in any one of claims 1-9, characterized in that, Includes the following steps: 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 supply side and load side terminals of the circuit breaker respectively. Tighten them with bolts of the corresponding specifications. Gently pull the wires to check the reliability of the connection and ensure that there is no looseness or loose connection. S2. Through the auxiliary clamping component (5), the power supply side and load side wires are respectively subjected to secondary limit clamping, which not only restricts 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 force pulling. S3. When the circuit is short-circuited, the large current causes the electromagnetic coil (303) to generate a strong electromagnetic force, triggering the trip. The circuit breaker contacts are driven to disconnect through the triggering structure (304), quickly cutting off the short-circuit current and completing the conventional fault protection. This is the short-circuit instantaneous protection response. S4. Under continuous short circuit or abnormal operating conditions, 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) has reached the critical value, it immediately sends an electrical signal to the active circuit breaking protection component (4). After receiving the signal, the active circuit breaking protection component (4) quickly cuts off the circuit to prevent the fault from expanding and realizes active protection response under short circuit conditions.

Images