A reclosing small circuit breaker

Abstract

The present invention belongs to the technical field of circuit breakers, and specifically is a reclosing small circuit breaker, comprising a circuit breaker body, one side of which is fixedly connected to a shell; a fire extinguishing unit is arranged inside the shell; the fire extinguishing unit comprises a carbon dioxide gas cylinder arranged inside the shell; a bottle opening assembly is arranged at the bottle mouth of the carbon dioxide gas cylinder; a temperature sensor and a smoke sensor are arranged inside the shell; when the internal temperature of the circuit breaker body exceeds a safety value set by the temperature sensor, and when the concentration of the smoke exceeds the safety value set by the smoke sensor, the bottle opening assembly is driven to start, and the carbon dioxide gas stored in the carbon dioxide gas cylinder is released and transported to the circuit breaker body, and the carbon dioxide gas fills the inside of the circuit breaker body, isolates the oxygen in the air, and achieves the effect of suffocation and fire extinguishing; thereby reducing the harm of electrical fires, reducing economic losses and casualties.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit breakers, in particular to a small reclosing circuit breaker. Background Art

[0002] A reclosing circuit breaker is a power system device that can automatically reclose after a power system fault; when the circuit breaker is opened due to some fault, it is automatically reclosed using a mechanical device or relay automatic device.

[0003] A patent application with publication number CN107845546A discloses a reclosing circuit breaker, which mainly solves the problem that the transmission gears of the current reclosing circuit breakers are mostly directly installed in their housings, occupying too much space and having poor performance; the first housing also includes a power source, and the power source drives the first rotating disk and the second rotating disk to rotate through a reduction gear box, and the reduction gear box includes an input gear, an output gear and a plurality of transmission gears, the input gear is used to connect to the power source, and the output gear is used to drive the first rotating disk to rotate; the invention provides a reclosing circuit breaker that uses a reduction gear box to install gears, which greatly reduces the space required for installation and makes the overall structure more compact.

[0004] When a circuit breaker is overloaded or short-circuited, the temperature inside the circuit breaker will rise sharply, causing the circuit breaker to burn out and cause an electrical fire. However, existing circuit breakers do not have a fire extinguishing function, which can easily increase the harm of the fire and cause serious economic losses and casualties.

[0005] To this end, the present invention provides a reclosing miniature circuit breaker. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a reclosing small circuit breaker described in the present invention includes a circuit breaker body, one side of the circuit breaker body is fixedly connected to a shell; a sealing cover is bolted to a side of the shell away from the circuit breaker body; a fire extinguishing unit is arranged inside the shell; the fire extinguishing unit includes a carbon dioxide gas cylinder arranged inside the shell; a bottle opening assembly is arranged at the bottle mouth of the carbon dioxide gas cylinder; the bottle opening assembly is arranged on the inner wall of the shell; the bottle opening assembly is used to open the carbon dioxide gas cylinder, and the bottle opening assembly is connected to the inside of the circuit breaker body; a temperature sensor and a smoke sensor are arranged inside the shell; the temperature sensor and the smoke sensor are both connected to the inside of the circuit breaker body.

[0008] Preferably, a mounting seat is fixedly connected to the bottom side of the shell; the carbon dioxide gas cylinder is installed inside the mounting seat; the bottle opening assembly is arranged between the top surface of the mounting seat and the top surface of the shell; a push plate is slidably installed inside the mounting seat; a groove matching the bottom of the carbon dioxide gas cylinder is provided in the middle of the top surface of the push plate; a No. 1 spring is fixedly connected between the middle of the bottom surface of the push plate and the inner bottom surface of the mounting seat.

[0009] Preferably, an annular fixing clamp is fixedly connected to the middle part of the top surface of the push plate; the annular fixing clamp is composed of a fixed circular ring and a plurality of elastic strips fixed around the fixed circular ring; the annular fixing clamp is sleeved on the outer ring of the groove on the top surface of the push plate; the annular fixing clamp can clamp the bottom of the carbon dioxide gas cylinder; a pair of elastic clamps are fixedly connected to the inner wall of the shell; the pair of elastic clamps can clamp the body of the carbon dioxide gas cylinder.

[0010] Preferably, the bottle opening assembly includes a tube body fixedly connected to the top of the mounting seat; the tube body passes through the top of the mounting seat; the outer ring of the bottle mouth of the carbon dioxide cylinder matches the bottom inner ring of the tube body; a tube mouth is provided on one side of the tube body; a puncture nail is provided inside the tube body; a plurality of air grooves are provided around the outer periphery of the puncture nail; an adsorption block is provided on the top of the puncture nail; an electromagnet is fixedly connected to the top surface of the interior of the shell; the electromagnet corresponds to the adsorption block; a cross plate is fixedly connected to the outer ring of the adsorption block; a No. 2 spring is fixedly connected between the top surface of the cross plate and the inner top surface of the shell.

[0011] Preferably, the pipe mouth of the tube body is connected to an air pipe; a crossbeam is fixedly connected to the bottom surface of the shell; a cavity is opened inside the crossbeam; the other end of the air pipe is connected to the cavity of the crossbeam; a plurality of through holes are evenly opened on the top surface of the crossbeam; and the through holes are connected to the bottom of the circuit breaker body.

[0012] Preferably, an annular groove is formed on the top outer ring of the puncture nail; a rubber sealing ring is fixedly connected inside the top annular groove of the puncture nail; the outer ring of the rubber sealing ring can be in sliding contact with the inner wall of the tube body; a limiting ring frame is fixedly connected to the inner wall of the tube body; the limiting ring frame is located at the top of the tube mouth of the tube body; the puncture nail is slidably arranged in the middle of the limiting ring frame; and a rubber buffer ring is fixedly connected to the bottom of the tube body.

[0013] Preferably, a box body is fixedly connected to the middle part of the shell; the box body is arranged between the tube body and the crossbeam; the interior of the box body is filled with dry powder fire extinguishing agent; an air inlet is arranged on one side of the top surface of the box body; the air inlet of the box body is connected to an end of the air pipe away from the tube body; and an air outlet is arranged on one side of the box body away from the air inlet.

[0014] Preferably, a plurality of partition plates are evenly fixedly connected to the inner bottom surface of the box; the dry powder fire extinguishing agent is filled between the plurality of partition plates; a plurality of guide plates are fixedly connected to the inner top surface of the box; the guide plates and the partition plates are alternately arranged; and the height of the dry powder fire extinguishing agent is lower than the height of the bottom end of the guide plate.

[0015] Preferably, a mixing barrel is fixedly connected to the inner wall of the shell; a connecting port is fixedly connected to the top side of the mixing barrel; the connecting port is arranged tangent to the inner wall of the mixing barrel; the connecting port is connected to the air outlet of the box body; an air outlet pipe is fixedly connected to the bottom of the mixing barrel, and the air outlet pipe of the mixing barrel passes through the bottom of the shell; the air outlet pipe of the mixing barrel is connected to the cavity of the cross beam.

[0016] Preferably, a U-shaped seat is provided at the bottom of one side of the transverse plate close to the No. 2 spring; the U-shaped seat is fixedly connected to the inner wall of the shell; the air pipe passes through the U-shaped seat; a slide groove is provided on the inner bottom surface of the U-shaped seat; a clamping block is slidably installed inside the slide groove; push rods are fixedly connected to both sides of the top surface of the clamping block; the push rod slides through the top of the U-shaped seat; the top end of the push rod is fixedly connected to the bottom surface of the transverse plate.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. A reclosing miniature circuit breaker described in the present invention comprises a circuit breaker body, a shell, a carbon dioxide gas cylinder, a temperature sensor, a smoke sensor and a bottle opening assembly; when the internal temperature of the circuit breaker body exceeds the safety value set by the temperature sensor, and when the concentration of the smoke exceeds the safety value set by the smoke sensor, a signal is sent to drive the bottle opening assembly to start, and the carbon dioxide gas stored in the carbon dioxide gas cylinder is released and transported to the circuit breaker body, and the carbon dioxide gas fills the interior of the circuit breaker body, isolating the oxygen in the air, and achieving the effect of suffocation and extinguishing the fire; at the same time, the circuit of the circuit breaker body is controlled to be cut off, and the entire circuit is disconnected, thereby reducing the hazards of electrical fires, reducing economic losses and casualties.

[0019] 2. A reclosing small circuit breaker described in the present invention comprises a box, a partition, a guide plate and a dry powder fire extinguishing agent; when the carbon dioxide gas passes through the air flow channel inside the box, the carbon dioxide gas is blocked and guided by the guide plate, so that the carbon dioxide gas passes between adjacent partitions and brings out the dry powder fire extinguishing agent at the bottom of the box, so that the carbon dioxide gas and the dry powder fire extinguishing agent are mixed and enter the interior of the circuit breaker body; the dry powder fire extinguishing agent will wrap and cover the internal components of the circuit breaker body, and the dry powder fire extinguishing agent will form a glass-like covering layer at high temperature to isolate oxygen and achieve the purpose of extinguishing the fire; thereby, the fire extinguishing time of the circuit breaker body can be extended and the effect on the circuit breaker body can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 is a stereogram of the present invention;

[0022] Figure 2 It is the internal structure diagram of the housing in the present invention;

[0023] Figure 3 is a three-dimensional diagram of a fire extinguishing unit in the present invention;

[0024] Figure 4 is an exploded view of the mounting seat of the present invention;

[0025] Figure 5 is a cross-sectional view of the tube body of the present invention;

[0026] Figure 6 is a three-dimensional diagram of the puncture nail in the present invention;

[0027] Figure 7 is a three-dimensional diagram of the annular fixing clamp of the present invention;

[0028] Figure 8 is a cross-sectional view of the box body of the present invention;

[0029] Fig. 9 It is the internal structure diagram of the mixing barrel in the present invention;

[0030] Fig.10 is a cross-sectional view of a mixing barrel and a crossbeam in the present invention;

[0031] Fig.11 It is an exploded view of the U-shaped seat in the present invention;

[0032] In the figure: 1. Circuit breaker body; 2. Shell; 3. Sealing cover; 4. Carbon dioxide cylinder; 5. Temperature sensor; 6. Smoke sensor; 7. Mounting seat; 8. Push plate; 9. No. 1 spring; 10. Ring fixing clamp; 11. Elastic clamp; 12. Tube body; 13. Piercing nail; 14. Air groove; 15. Adsorption block; 16. Electromagnet; 17. Air pipe; 18. Crossbeam; 19. Through hole; 20. Rubber sealing ring; 21. Limiting ring frame; 22. Rubber buffer ring; 23. Box body; 24. Partition plate; 25. Guide plate; 26. Mixing barrel; 27. Connection port; 28. Cross plate; 29. ​​No. 2 spring; 30. U-shaped seat; 31. Slide groove; 32. Clamp block; 33. Push rod. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] like Figures 1 to 4As shown, a reclosing miniature circuit breaker according to an embodiment of the present invention comprises a circuit breaker body 1, a shell 2 is fixedly connected to one side of the circuit breaker body 1; a sealing cover 3 is bolted to a side of the shell 2 away from the circuit breaker body 1; a fire extinguishing unit is arranged inside the shell 2; the fire extinguishing unit comprises a carbon dioxide gas cylinder 4 arranged inside the shell 2; a bottle opening assembly is arranged at the bottle mouth of the carbon dioxide gas cylinder 4; the bottle opening assembly is arranged on the inner wall of the shell 2; the bottle opening assembly is used to open the carbon dioxide gas cylinder 4, and the bottle opening assembly is connected to the inside of the circuit breaker body 1; a temperature sensor 5 and a smoke sensor 6 are arranged inside the shell 2; the temperature sensor 5 and the smoke sensor 6 are both connected to the inside of the circuit breaker body 1;

[0035] During operation, when an overload or short circuit fault occurs inside the circuit breaker body 1, the internal temperature of the circuit breaker body 1 is too high, and the high temperature inside the circuit breaker body 1 causes the plastic parts to generate smoke; at this time, the temperature inside the circuit breaker body 1 is detected by the temperature sensor 5, and the generated smoke is detected by the smoke sensor 6; when the internal temperature of the circuit breaker body 1 exceeds the safety value set by the temperature sensor 5, and the concentration of the smoke exceeds the safety value set by the smoke sensor 6, a signal is sent to drive the bottle opening component to start, open the bottle mouth of the carbon dioxide cylinder 4, so that the carbon dioxide gas stored in the carbon dioxide cylinder 4 is released and transported to the circuit breaker body 1, and the carbon dioxide gas fills the inside of the circuit breaker body 1, isolating the oxygen in the air, and achieving the effect of suffocation and fire extinguishing; at the same time, the circuit of the circuit breaker body 1 is controlled to be cut off, and the entire circuit is disconnected; thereby reducing the hazards of electrical fires, reducing economic losses and casualties.

[0036] like Figures 2 to 4 As shown, a mounting seat 7 is fixedly connected to the bottom side of the shell 2; the carbon dioxide gas cylinder 4 is installed inside the mounting seat 7; the bottle opening assembly is arranged between the top surface of the mounting seat 7 and the top surface inside the shell 2; a push plate 8 is slidably installed inside the mounting seat 7; a groove matching the bottom of the carbon dioxide gas cylinder 4 is provided in the middle of the top surface of the push plate 8; a No. 1 spring 9 is fixedly connected between the middle of the bottom surface of the push plate 8 and the inner bottom surface of the mounting seat 7;

[0037] During operation, when installing the carbon dioxide gas cylinder 4, the push plate 8 is pushed to slide downward, so that the No. 1 spring 9 is compressed and stored, and the bottom of the carbon dioxide gas cylinder 4 is aligned with the groove on the top surface of the push plate 8 and inserted, and then the carbon dioxide gas cylinder 4 is rotated so that the bottle body of the carbon dioxide gas cylinder 4 enters the interior of the mounting seat 7, and at the same time, the bottle mouth of the carbon dioxide gas cylinder 4 is aligned with the bottle opening component; the push plate 8 is released, and the No. 1 spring 9 is reset, pushing the push plate 8 to slide upward, pushing the carbon dioxide gas cylinder 4 to move upward inside the mounting seat 7, so that the bottle mouth of the carbon dioxide gas cylinder 4 is docked with the bottle opening component, and the carbon dioxide gas cylinder 4 is fixedly installed inside the mounting seat 7, thereby completing the installation of the carbon dioxide gas cylinder 4, which is convenient for maintenance and overhaul by the staff.

[0038] like Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, an annular fixing clamp 10 is fixedly connected to the middle of the top surface of the push plate 8; the annular fixing clamp 10 is composed of a fixed circular ring and a plurality of elastic strips fixedly connected to the fixed circular ring; the annular fixing clamp 10 is sleeved on the outer ring of the groove on the top surface of the push plate 8; the annular fixing clamp 10 can clamp the bottom of the carbon dioxide gas cylinder 4; a pair of elastic clamps 11 are fixedly connected to the inner wall of the shell 2; the pair of elastic clamps 11 can clamp the body of the carbon dioxide gas cylinder 4;

[0039] During operation, when the bottom of the carbon dioxide gas cylinder 4 is aligned with the groove on the top surface of the push plate 8 and inserted, the bottom of the carbon dioxide gas cylinder 4 is sleeved inside the annular fixing clamp 10, and the annular fixing clamp 10 clamps and fixes the bottom of the carbon dioxide gas cylinder 4; when the body of the carbon dioxide gas cylinder 4 enters the interior of the mounting seat 7, the body of the carbon dioxide gas cylinder 4 is clamped between the elastic clamps 11 on both sides, and the elastic clamps 11 on both sides clamp and fix the body of the carbon dioxide gas cylinder 4; thereby improving the firmness of the carbon dioxide gas cylinder 4 inside the mounting seat 7.

[0040] like Figures 2 to 6 As shown, the bottle opening assembly includes a tube body 12 fixedly connected to the top of the mounting seat 7; the tube body 12 passes through the top of the mounting seat 7; the outer ring of the bottle mouth of the carbon dioxide gas cylinder 4 matches the inner ring of the bottom of the tube body 12; a tube mouth is provided on one side of the tube body 12; a puncture nail 13 is provided inside the tube body 12; a plurality of air grooves 14 are provided around the outer periphery of the puncture nail 13; an adsorption block 15 is provided on the top of the puncture nail 13; an electromagnet 16 is fixedly connected to the top surface of the inner part of the shell 2; the electromagnet 16 corresponds to the adsorption block 15; a transverse plate 28 is fixedly connected to the outer ring of the adsorption block 15; a No. 2 spring 29 is fixedly connected between the top surface of the transverse plate 28 and the inner top surface of the shell 2;

[0041] During operation, the first spring 9 is reset, pushing the push plate 8 to slide upward, pushing the carbon dioxide gas cylinder 4 to move upward inside the mounting seat 7, so that the bottle mouth of the carbon dioxide gas cylinder 4 is inserted into the inner circle at the bottom of the tube body 12;

[0042] When the circuit breaker body 1 is not faulty, the electromagnet 16 is energized to generate magnetic force, which attracts the adsorption block 15, drives the puncture nail 13 to the top of the tube body 12, and at the same time drives the horizontal plate 28 to move upward, so that the second spring 29 is compressed and stored;

[0043] When the circuit breaker body 1 fails, the temperature sensor 5 and the smoke sensor 6 generate signals to drive the bottle opening assembly to start, the electromagnet 16 is powered off and loses its magnetic force, the suction force on the adsorption block 15 disappears, the second spring 29 is reset, and the cross plate 28 and the puncture nail 13 are pushed to move downward, the puncture nail 13 moves downward along the tube body 12, and the bottom end of the puncture nail 13 penetrates the bottle mouth of the carbon dioxide cylinder 4, and the carbon dioxide gas inside the carbon dioxide cylinder 4 is discharged into the interior of the tube body 12 along the gas groove 14 of the puncture nail 13, and then transported to the interior of the circuit breaker body 1 for fire extinguishing; thereby achieving the release of carbon dioxide gas.

[0044] like Figures 2 to 6 As shown, the pipe opening of the pipe body 12 is connected with an air pipe 17; a crossbeam 18 is fixedly connected to the bottom surface of the housing 2; a cavity is formed inside the crossbeam 18; the other end of the air pipe 17 is connected to the cavity of the crossbeam 18; a plurality of through holes 19 are evenly formed on the top surface of the crossbeam 18; the through holes 19 are connected to the bottom of the circuit breaker body 1;

[0045] During operation, the carbon dioxide gas is discharged into the interior of the tube body 12 along the gas groove 14 of the puncture nail 13, and then the carbon dioxide gas is transported to the interior of the crossbeam 18 after passing through the gas pipe 17, and then dispersedly transported to the interior of the circuit breaker body 1 through the multiple through holes 19, thereby improving the efficiency of the carbon dioxide gas filling the interior of the circuit breaker body 1, thereby improving the fire extinguishing efficiency inside the circuit breaker body 1.

[0046] like Figures 5 and 6 As shown, the top outer ring of the puncture nail 13 is provided with an annular groove; a rubber sealing ring 20 is fixed inside the top annular groove of the puncture nail 13; the outer ring of the rubber sealing ring 20 can be in sliding contact with the inner wall of the tube body 12; the inner wall of the tube body 12 is fixed with a limiting ring frame 21; the limiting ring frame 21 is located at the top of the tube mouth of the tube body 12; the puncture nail 13 is slidably arranged in the middle of the limiting ring frame 21; the bottom of the tube body 12 is fixed with a rubber buffer ring 22;

[0047] By providing the rubber sealing ring 20, when the puncture nail 13 slides downward along the tube body 12, the outer ring of the rubber sealing ring 20 contacts the inner wall of the tube body 12, and the top of the tube body 12 is sealed, thereby reducing the leakage loss of carbon dioxide gas and improving the utilization rate of carbon dioxide gas;

[0048] The limiting ring frame 21 is provided to guide the sliding of the puncture nail 13, thereby improving the accuracy of the puncture nail 13 penetrating the bottle mouth of the carbon dioxide gas cylinder 4; at the same time, the limiting ring frame 21 can block the top of the puncture nail 13, limiting the height to which the puncture nail 13 can move downward;

[0049] The rubber buffer ring 22 is provided to buffer the carbon dioxide gas cylinder 4, and at the same time, the top of the carbon dioxide gas cylinder 4 and the bottom of the tube body 12 are sealed, thereby reducing the leakage loss of carbon dioxide gas.

[0050] like Figure 2 , Figure 3 and Figure 8 As shown, a box body 23 is fixedly connected to the middle of the shell 2; the box body 23 is arranged between the tube body 12 and the crossbeam 18; the box body 23 is filled with dry powder fire extinguishing agent; an air inlet is arranged on one side of the top surface of the box body 23; the air inlet of the box body 23 is connected to the end of the air pipe 17 away from the tube body 12; an air outlet is arranged on the side of the box body 23 away from the air inlet;

[0051] A plurality of partition plates 24 are evenly fixed to the inner bottom surface of the box 23; the dry powder fire extinguishing agent is filled between the plurality of partition plates 24; a plurality of guide plates 25 are fixed to the inner top surface of the box 23; the guide plates 25 and the partition plates 24 are arranged alternately; the height of the dry powder fire extinguishing agent is lower than the height of the bottom end of the guide plate 25;

[0052] During operation, after the carbon dioxide gas passes through the air pipe 17, the carbon dioxide gas enters the interior of the box 23. The partition plate 24 and the guide plate 25 of the box 23 cooperate to form a corrugated airflow channel. When the carbon dioxide gas passes through the airflow channel inside the box 23, the carbon dioxide gas is blocked and guided by the guide plate 25, so that the carbon dioxide gas passes between adjacent partition plates 24, and brings out the dry powder fire extinguishing agent at the bottom of the box 23, so that the carbon dioxide gas and the dry powder fire extinguishing agent are mixed and enter the interior of the circuit breaker body 1; the dry powder fire extinguishing agent will wrap and cover the internal components of the circuit breaker body 1, and the dry powder fire extinguishing agent will form a glass-like covering layer at high temperature to isolate oxygen and achieve the purpose of fire extinguishing; thereby, the fire extinguishing time of the circuit breaker body 1 can be extended, and the effect on the circuit breaker body 1 is improved.

[0053] like Figure 2 , Figure 3 , Fig. 9 and Fig.10 As shown, a mixing barrel 26 is fixedly connected to the inner wall of the shell 2; a connecting port 27 is fixedly connected to the top side of the mixing barrel 26; the connecting port 27 is tangent to the inner wall of the mixing barrel 26; the connecting port 27 is connected to the air outlet of the box 23; an air outlet pipe is fixedly connected to the bottom of the mixing barrel 26, and the air outlet pipe of the mixing barrel 26 passes through the bottom of the shell 2; the air outlet pipe of the mixing barrel 26 is connected to the cavity of the crossbeam 18;

[0054] During operation, the carbon dioxide gas brings out the dry powder fire extinguishing agent in the box body 23, and then enters the interior of the mixing barrel 26 through the connecting port 27 of the mixing barrel 26. Since the connecting port 27 is tangent to the interior of the mixing barrel 26, when the carbon dioxide gas enters the interior of the mixing barrel 26, a vortex is formed inside the mixing barrel 26, thereby improving the uniformity of mixing the carbon dioxide gas and the dry powder fire extinguishing agent, so that the carbon dioxide gas can evenly bring the dry powder fire extinguishing agent into the interior of the circuit breaker body 1, thereby improving the uniformity of the dry powder fire extinguishing agent covering the interior of the circuit breaker body 1.

[0055] like Figure 2 , Figure 3 , Figure 4 and Fig.11 As shown, a U-shaped seat 30 is provided at the bottom of one side of the horizontal plate 28 close to the second spring 29; the U-shaped seat 30 is fixedly connected to the inner wall of the housing 2; the air pipe 17 passes through the U-shaped seat 30; a slide groove 31 is provided on the inner bottom surface of the U-shaped seat 30; a clamping block 32 is slidably installed inside the slide groove 31; push rods 33 are fixedly connected to both sides of the top surface of the clamping block 32; the push rod 33 slides through the top of the U-shaped seat 30; the top end of the push rod 33 is fixedly connected to the bottom surface of the horizontal plate 28;

[0056] During operation, when the circuit breaker body 1 does not fail, the adsorption block 15 and the electromagnet 16 are in an attracted state, driving the horizontal plate 28 to move upward, so that the second spring 29 is compressed and stored; at the same time, the horizontal plate 28 drives the push rod 33 to move upward, driving the clamping block 32 to slide upward along the slide groove 31, and the clamping block 32 cooperates with the U-shaped seat 30 to clamp the air pipe 17 to cut off the flow;

[0057] When the circuit breaker body 1 fails, the second spring 29 resets and pushes the horizontal plate 28 to move downward, pushing the clamping block 32 to slide downward along the slide groove 31, releasing the air pipe 17, unblocking the air pipe 17, and allowing carbon dioxide gas to pass through the air pipe 17.

[0058] Working principle: when installing the carbon dioxide gas cylinder 4, push the push plate 8 to slide downward, so that the No. 1 spring 9 is compressed and stored, and the bottom of the carbon dioxide gas cylinder 4 is aligned with the groove on the top surface of the push plate 8 and inserted, and the bottom of the carbon dioxide gas cylinder 4 is sleeved inside the annular fixing clamp 10, and the annular fixing clamp 10 clamps and fixes the bottom of the carbon dioxide gas cylinder 4; then rotate the carbon dioxide gas cylinder 4 so that the bottle body of the carbon dioxide gas cylinder 4 enters the interior of the mounting seat 7, and the bottle body of the carbon dioxide gas cylinder 4 is stuck between the elastic clamps 11 on both sides, and the elastic clamps 11 on both sides clamp and fix the bottle body of the carbon dioxide gas cylinder 4; at the same time, the bottle mouth of the carbon dioxide gas cylinder 4 is aligned with the bottle opening assembly; release the push plate 8, the No. 1 spring 9 is reset, and the push plate 8 is pushed to slide upward, and the carbon dioxide gas cylinder 4 is pushed to move upward inside the mounting seat 7, so that the bottle mouth of the carbon dioxide gas cylinder 4 is docked with the bottle opening assembly, and the carbon dioxide gas cylinder 4 is fixedly installed inside the mounting seat 7, completing the installation of the carbon dioxide gas cylinder 4, which is convenient for maintenance and repair by the staff;

[0059] When the circuit breaker body 1 is not faulty, the electromagnet 16 is energized to generate magnetic force, which attracts the adsorption block 15, drives the puncture nail 13 to the top of the tube body 12, and at the same time, drives the cross plate 28 to move upward, so that the second spring 29 is compressed and stored; the adsorption block 15 and the electromagnet 16 are in an attracted state, driving the cross plate 28 to move upward, so that the second spring 29 is compressed and stored; at the same time, the cross plate 28 drives the push rod 33 to move upward, drives the clamping block 32 to slide upward along the slide groove 31, and the clamping block 32 cooperates with the U-shaped seat 30 to clamp the air pipe 17 to cut off the flow;

[0060] When an overload or short circuit fault occurs inside the circuit breaker body 1, the internal temperature of the circuit breaker body 1 is too high, and the high temperature inside the circuit breaker body 1 causes the plastic parts to generate smoke; at this time, the temperature inside the circuit breaker body 1 is detected by the temperature sensor 5, and the generated smoke is detected by the smoke sensor 6; when the internal temperature of the circuit breaker body 1 exceeds the safety value set by the temperature sensor 5, and the concentration of the smoke exceeds the safety value set by the smoke sensor 6, a signal is sent to drive the bottle opening component to start; at the same time, the circuit of the circuit breaker body 1 is controlled to be cut off, disconnecting the entire circuit;

[0061] The electromagnet 16 loses its power and loses its magnetic force, the suction force on the adsorption block 15 disappears, the No. 2 spring 29 is reset, pushing the cross plate 28 and the puncture nail 13 to move downward, the puncture nail 13 moves downward along the tube body 12, and the bottom end of the puncture nail 13 penetrates the bottle mouth of the carbon dioxide gas cylinder 4, and the carbon dioxide gas inside the carbon dioxide gas cylinder 4 is discharged into the interior of the tube body 12 along the gas groove 14 of the puncture nail 13; after the carbon dioxide gas passes through the trachea 17, the carbon dioxide gas enters the interior of the box body 23, and the partition plate 24 and the guide plate 25 of the box body 23 cooperate to form a corrugated airflow channel, and the carbon dioxide gas passes through the air pipe 17. When passing through the air flow channel inside the box 23, the carbon dioxide gas is blocked and guided by the guide plate 25, so that the carbon dioxide gas passes between the adjacent partition plates 24 and takes out the dry powder fire extinguishing agent at the bottom of the box 23; after the carbon dioxide gas takes out the dry powder fire extinguishing agent inside the box 23, it enters the interior of the mixing barrel 26 through the connecting port 27 of the mixing barrel 26. Since the connecting port 27 is tangent to the interior of the mixing barrel 26, when the carbon dioxide gas enters the interior of the mixing barrel 26, a vortex is formed inside the mixing barrel 26, thereby improving the uniformity of mixing the carbon dioxide gas and the dry powder fire extinguishing agent;

[0062] The carbon dioxide gas and the dry powder fire extinguishing agent are transported to the interior of the crossbeam 18, and then dispersedly transported to the interior of the circuit breaker body 1 through the multiple through holes 19; the carbon dioxide gas fills the interior of the circuit breaker body 1, isolating the oxygen in the air, and achieving the effect of suffocating the fire; at the same time, the dry powder fire extinguishing agent will wrap and cover the internal components of the circuit breaker body 1, and the dry powder fire extinguishing agent forms a glass-like covering layer at high temperature, isolating oxygen, and achieving the purpose of fire extinguishing; thereby reducing the hazards of electrical fires, reducing economic losses and casualties.

[0063] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A reclosing miniature circuit breaker, comprising a circuit breaker body (1), characterized in that: A shell (2) is fixedly connected to one side of the circuit breaker body (1); a sealing cover (3) is bolted to a side of the shell (2) away from the circuit breaker body (1); and a fire extinguishing unit is arranged inside the shell (2); The fire extinguishing unit comprises a carbon dioxide gas cylinder (4) arranged inside the housing (2); a bottle opening assembly is arranged at the bottle mouth of the carbon dioxide gas cylinder (4); the bottle opening assembly is arranged on the inner wall of the housing (2); the bottle opening assembly is used to open the carbon dioxide gas cylinder (4), and the bottle opening assembly is connected to the inside of the circuit breaker body (1); a temperature sensor (5) and a smoke sensor (6) are arranged inside the housing (2); the temperature sensor (5) and the smoke sensor (6) are both connected to the inside of the circuit breaker body (1); A mounting seat (7) is fixedly connected to the bottom side of the shell (2); the carbon dioxide gas cylinder (4) is mounted inside the mounting seat (7); the bottle opening assembly is arranged between the top surface of the mounting seat (7) and the top surface inside the shell (2); a push plate (8) is slidably mounted inside the mounting seat (7); a groove matching the bottom of the carbon dioxide gas cylinder (4) is formed in the middle of the top surface of the push plate (8); a No. 1 spring (9) is fixedly connected between the middle of the bottom surface of the push plate (8) and the inner bottom surface of the mounting seat (7); An annular fixing clamp (10) is fixedly connected to the middle of the top surface of the push plate (8); the annular fixing clamp (10) is composed of a fixing ring and a plurality of elastic strips surrounding and fixed to the fixing ring; the annular fixing clamp (10) is sleeved on the outer ring of the groove on the top surface of the push plate (8); the annular fixing clamp (10) is capable of clamping the bottom of the carbon dioxide gas cylinder (4); a pair of elastic clamps (11) are fixedly connected to the inner wall of the shell (2); the pair of elastic clamps (11) is capable of clamping the body of the carbon dioxide gas cylinder (4); The bottle opening assembly comprises a tube body (12) fixedly connected to the top of the mounting seat (7); the tube body (12) penetrates the top of the mounting seat (7); the outer ring of the bottle mouth of the carbon dioxide gas cylinder (4) matches the inner ring of the bottom of the tube body (12); a tube mouth is provided on one side of the tube body (12); a puncture nail (13) is provided inside the tube body (12); a plurality of air grooves (14) are provided around the outer periphery of the puncture nail (13); an adsorption block (15) is provided at the top of the puncture nail (13); an electromagnet (16) is fixedly connected to the top surface of the inner part of the shell (2); the electromagnet (16) corresponds to the adsorption block (15); a transverse plate (28) is fixedly connected to the outer ring of the adsorption block (15); a second spring (29) is fixedly connected between the top surface of the transverse plate (28) and the inner top surface of the shell (2); The top outer ring of the puncture nail (13) is provided with an annular groove; a rubber sealing ring (20) is fixedly connected inside the top annular groove of the puncture nail (13); the outer ring of the rubber sealing ring (20) can be in sliding contact with the inner wall of the tube body (12); the inner wall of the tube body (12) is fixedly connected to a limiting ring frame (21); the limiting ring frame (21) is located at the top of the tube mouth of the tube body (12); the puncture nail (13) is slidably arranged in the middle of the limiting ring frame (21); and the bottom of the tube body (12) is fixedly connected to a rubber buffer ring (22).

2. A reclosing miniature circuit breaker according to claim 1, characterized in that: The pipe mouth of the pipe body (12) is connected to an air pipe (17); the bottom surface of the housing (2) is fixedly connected to a crossbeam (18); a cavity is provided inside the crossbeam (18); the other end of the air pipe (17) is connected to the cavity of the crossbeam (18); a plurality of through holes (19) are evenly provided on the top surface of the crossbeam (18); and the through holes (19) are connected to the bottom of the circuit breaker body (1).

3. A reclosing miniature circuit breaker according to claim 2, characterized in that: A box body (23) is fixedly connected to the middle of the shell (2); the box body (23) is arranged between the tube body (12) and the crossbeam (18); a dry powder fire extinguishing agent is filled inside the box body (23); an air inlet is arranged on one side of the top surface of the box body (23); the air inlet of the box body (23) is connected to an end of the air pipe (17) away from the tube body (12); and an air outlet is arranged on a side of the box body (23) away from the air inlet.

4. A reclosing miniature circuit breaker according to claim 3, characterized in that: The inner bottom surface of the box (23) is evenly fixed with a plurality of partition plates (24); the dry powder fire extinguishing agent is filled between the plurality of partition plates (24); the inner top surface of the box (23) is fixed with a plurality of guide plates (25); the guide plates (25) and the partition plates (24) are arranged alternately; and the height of the dry powder fire extinguishing agent is lower than the height of the bottom end of the guide plate (25).

5. A reclosing miniature circuit breaker according to claim 4, characterized in that; A mixing barrel (26) is fixedly connected to the inner wall of the shell (2); a connecting port (27) is fixedly connected to the top side of the mixing barrel (26); the connecting port (27) is arranged tangent to the inner wall of the mixing barrel (26); the connecting port (27) is connected to the air outlet of the box (23); an air outlet pipe is fixedly connected to the bottom of the mixing barrel (26), and the air outlet pipe of the mixing barrel (26) passes through the bottom of the shell (2); the air outlet pipe of the mixing barrel (26) is connected to the cavity of the crossbeam (18).

6. A reclosing miniature circuit breaker according to claim 2, characterized in that: A U-shaped seat (30) is provided at the bottom of one side of the transverse plate (28) close to the second spring (29); the U-shaped seat (30) is fixedly connected to the inner wall of the shell (2); the air pipe (17) passes through the U-shaped seat (30); a slide groove (31) is provided on the inner bottom surface of the U-shaped seat (30); a clamping block (32) is slidably installed inside the slide groove (31); push rods (33) are fixedly connected to both sides of the top surface of the clamping block (32); the push rod (33) slides through the top of the U-shaped seat (30); and the top end of the push rod (33) is fixedly connected to the bottom surface of the transverse plate (28).

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