A device and method for identifying overheating faults in a high-voltage distribution cabinet

Abstract

The present invention relates to the technical field of power distribution cabinets, specifically to a device for identifying overheating faults in high-voltage power distribution cabinets, comprising a power distribution cabinet body, a door panel hinged on the left side of the front end face of the power distribution cabinet body, an electrical device fixedly mounted on the inner lower end face of the power distribution cabinet body, a partition provided on the upper side of the electrical device, the partition being fixedly connected to the power distribution cabinet body, a trigger mechanism 1 provided on the left side of the upper end face of the partition, a trigger mechanism 2 provided on the right side of the trigger mechanism, a fire extinguishing mechanism provided on the front side of the trigger mechanism 1, a power-off mechanism provided on the right side of the electrical device, the trigger mechanism 1 triggering a fire alarm, and triggering the trigger mechanism 2, the power-off mechanism and the fire extinguishing mechanism. The present invention provides a trigger mechanism 1 and a fire extinguishing mechanism, and when the electrical device catches fire, the trigger mechanism 1 will be triggered, thereby causing the alarm to operate and sound an alarm, and at the same time, the fire extinguishing mechanism will be triggered to spray dry powder and carbon dioxide to extinguish the fire of the electrical device.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution cabinets, and in particular to a device and method for identifying an overheating fault of a high-voltage power distribution cabinet. Background Art

[0002] Distribution cabinets can be divided into power distribution cabinets and lighting distribution cabinets. They are the final equipment of the distribution system and the general term for motor control centers. They are used in situations where the load is concentrated and there are many circuits. They distribute the electrical energy of a circuit of the upper-level distribution equipment to the nearest load, providing protection, monitoring and control for the load. When using distribution cabinets, some new materials are also used. For example, thermal bimetallic materials are often used. Thermal bimetallic materials are composite materials composed of two or more metals or metal combination elements with different thermal expansion coefficients firmly fixed together, which will deform when heated.

[0003] There are complex wiring and many wire ends inside the power cabinet. Therefore, when a short circuit occurs in the circuit, the power cabinet is also the most vulnerable to damage. When a fire occurs inside the power cabinet, if the staff and users do not discover it in time, it will cause great losses. If the fire is discovered when it is small, suddenly opening the distribution cabinet door will cause a large amount of air to enter, causing the fire to grow. This will not only cause harm to the person opening the door, but also cause secondary damage to the distribution cabinet.

[0004] To this end, a device and method for identifying overheating faults of a high-voltage distribution cabinet are proposed. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a device and method for identifying overheating faults of a high-voltage distribution cabinet.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A device for identifying overheating faults in a high-voltage distribution cabinet comprises a distribution cabinet body, a door panel being hinged on the left side of the front end face of the distribution cabinet body, an electrical device being fixedly installed on the inner lower end face of the distribution cabinet body, a partition being provided on the upper side of the electrical device, the partition being fixedly connected to the distribution cabinet body, a trigger mechanism 1 being provided on the left side of the upper end face of the partition, a trigger mechanism 2 being provided on the right side of the trigger mechanism, a fire extinguishing mechanism being provided on the front side of the trigger mechanism 1, and a power-off mechanism being provided on the right side of the electrical device, the trigger mechanism 1 triggering a fire alarm and triggering the trigger mechanism 2, the power-off mechanism and the fire extinguishing mechanism, the trigger mechanism 2 will knock the door panel open after being triggered, a large amount of carbon dioxide gas will be sprayed when the fire extinguishing mechanism is triggered to prevent the electrical device from burning, and the power-off mechanism will disconnect the power connection between the external power supply and the electrical device when triggered.

[0008] Preferably, the trigger mechanism includes a fixed block fixedly installed on the left side of the upper end of the partition, a memory spring fixedly installed on the right end of the fixed block, a slot corresponding to the memory spring is opened on the partition, a heat-conducting ring is provided on the outer surface of the memory spring, a connecting plate is fixedly installed on the lower end of the heat-conducting ring, a heat-conducting plate is provided on the lower side of the partition, and the connecting plate is fixedly connected to the heat-conducting plate through the slot.

[0009] Preferably, the trigger mechanism 1 also includes an electric contact fixedly installed on the right end of the memory spring, a firing pin fixedly installed on the right end of the electric contact, a support plate 1 is provided on the right side of the firing pin, a slide rail 1 is provided on the left side of the support plate 1, the slide rail 1 and the support plate 1 are both fixedly connected to the partition, the electric contact is slidably connected to the inside of the slide rail 1, and an electric contact sleeve is fixedly installed on the upper side of the left end surface of the support plate 1.

[0010] Preferably, the trigger mechanism 2 includes a notch 2 provided on the right end surface of the support plate 1 corresponding to the striker, a support plate 2 is provided on the right side of the notch 2, a spring 1 is fixedly installed between the support plate 2 and the inner arm of the main body of the brand power distribution cabinet, a connecting rod is fixedly installed at the front end of the support plate 2, a hammer is fixedly installed at the front end of the connecting rod, a slide rail 2 is provided on the lower side of the hammer, the hammer is slidably connected to the inside of the slide rail 2, and the slide rail 2 is fixedly connected to the partition.

[0011] Preferably, the trigger mechanism 2 also includes a fixing groove on the outer surface of the connecting rod corresponding to the slot 2, a fixing pin is inserted into the inside of the fixing groove, a mounting plate is fixedly installed on the left end of the fixing pin, and the fixing pin is slidably connected to the inner wall of the distribution cabinet mainboard.

[0012] Preferably, the power-off mechanism includes a circuit 1 fixedly installed on the lower side of the right end surface of the electrical equipment, a circuit 2 is provided on the right side of the circuit 1, a connecting sleeve is slidably connected to the outer surface of the circuit 1, a magnet is fixedly installed on the left end of the connecting sleeve, an electromagnet is provided on the left side of the magnet, the electromagnet is fixedly connected to the electrical equipment, a spring 2 is fixedly installed between the electromagnet and the magnet, a connecting plate is fixedly installed on the inner right end of the connecting sleeve, and the other end of the connecting sleeve is slidably connected to the outer surface of the circuit 2.

[0013] Preferably, the fire extinguishing mechanism includes a connecting plate 2 fixedly installed at the front end of the slider, a test kit 1 is fixedly installed on the front side of the upper end face of the partition, a test kit 2 is fixedly installed on the lower end face of the partition corresponding to the test kit 1, the partition is provided with a sliding groove corresponding to the test kit 1 and the test kit 2, the inside of the sliding groove is slidably connected to the slide, and the connecting plate 2 is fixedly connected to the slide.

[0014] Preferably, the first kit contains sodium bicarbonate, and the second kit contains magnesium stearate.

[0015] A method for identifying an overheating fault in a high-voltage distribution cabinet is characterized by comprising the following steps:

[0016] S1: Temperature trigger: When the electrical equipment heats up and catches fire, the heat-conducting plate will cause the memory spring to stretch, which will push the slider to slide on the slide rail, so that the electric contact and the electric contact sleeve will contact each other, and then the alarm will be triggered;

[0017] S2: Interlock trigger: As the slider slides, the striker hits the fixed pin, which then leaves the fixed slot, releasing the striker. Under the action of spring 1, the striker slides inside the second slide rail and hits the door panel, opening the door panel.

[0018] S3: Electrical fire extinguishing: When the slider moves, it opens the slide plate between the test kit 1 and the test kit 2, causing the reagents in the test kit 1 and the test kit 2 to come into contact and react with each other, thereby generating a large amount of carbon dioxide and dry powder that are ejected from the exhaust hole to extinguish the fire of the electrical equipment;

[0019] S4: Electrical power off: When the electrical contact is connected to the electrical contact sleeve, the electromagnet will generate magnetic force to attract the magnet, causing the magnet to carry the connecting sleeve away from line two, thereby disconnecting line one from line two.

[0020] Beneficial effects of the present invention:

[0021] 1. The present invention is provided with a trigger mechanism 1 and a fire extinguishing mechanism. When the electrical equipment catches fire, the trigger mechanism 1 is triggered, thereby causing the alarm to operate and sound an alarm. At the same time, the fire extinguishing mechanism is triggered to spray dry powder and carbon dioxide to extinguish the fire of the electrical equipment.

[0022] 2. The present invention is provided with a trigger mechanism 2 and a power-off mechanism. When the trigger mechanism 1 is triggered, the trigger mechanism 2 will be triggered at the same time, thereby knocking the door panel open to prevent the door panel from being locked and unable to be opened when a fire occurs. Secondly, the power-off mechanism is triggered synchronously to disconnect the power connection to the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0025] Figure 3 For the present invention Figure 2 A is an enlarged schematic diagram;

[0026] Figure 4 For the present invention Figure 2 An enlarged schematic diagram of point B in FIG.

[0027] Figure 5 is a cross-sectional view of a trigger mechanism 1 of the present invention;

[0028] Figure 6 For the present invention Figure 5 An enlarged schematic diagram of point B in FIG.

[0029] Figure 7 For the present invention Figure 5 An enlarged schematic diagram of point B in FIG.

[0030] Figure 8 is a cross-sectional view of the trigger mechanism 2 of the present invention;

[0031] Figure 9 For the present invention Figure 5 Enlarged schematic diagram of point B in FIG.

[0032] In the figure: 1 distribution cabinet body, 2 door panel, 3 electrical equipment, 4 partition, 5 fixed block, 6 memory spring, 7 notch 1, 8 slider, 9 connecting plate 1, 10 heat conducting ring, 11 heat conducting plate, 12 slide rail 1, 13 alarm, 14 slide groove, 15 electric contact, 16 striker, 17 support plate 1, 18 electric contact sleeve, 19 notch 2, 20 support plate 2, 21 spring 1, 22 connecting rod, 23 hammer, 24 slide rail 2, 25 fixing pin, 26 fixing groove, 27 striker, 28 line 1, 29 line 2, 30 electromagnet, 31 connecting sleeve, 32 magnet, 33 spring 2, 34 connecting plate, 35 connecting plate 2, 36 reagent kit 1, 37 reagent kit 2, 38 exhaust hole, 39 slide plate. DETAILED DESCRIPTION

[0033] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below 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 work are within the scope of protection of the present invention.

[0034] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] Reference Figure 1-9 , a device for identifying overheating faults of a high-voltage distribution cabinet, comprising a distribution cabinet body 1, a door panel 2 hinged on the left side of the front end face of the distribution cabinet body 1, an electrical device 3 fixedly installed on the lower end face of the inner part of the distribution cabinet body 1, a partition 4 provided on the upper side of the electrical device 3, the partition 4 being fixedly connected to the distribution cabinet body 1, a trigger mechanism 1 provided on the left side of the upper end face of the partition 4, a trigger mechanism 2 provided on the right side of the trigger mechanism, a fire extinguishing mechanism provided on the front side of the trigger mechanism 1, a power-off mechanism provided on the right side of the electrical device 3, the trigger mechanism 1 triggers a fire alarm and triggers the trigger mechanism 2, the power-off mechanism and the fire extinguishing mechanism, after the trigger mechanism 2 is triggered, the door panel 2 will be knocked open, and when the fire extinguishing mechanism is triggered, a large amount of carbon dioxide gas will be sprayed to prevent the electrical device 3 from burning, and when the power-off mechanism is triggered, the power connection between the external power supply and the electrical device 3 will be disconnected.

[0037] Specific examples Figures 1 to 9 As shown, the trigger mechanism 1 includes a fixed block 5 fixedly installed on the left side of the upper end of the partition 4, a memory spring 6 fixedly installed on the right end of the fixed block 5, a notch 7 is opened on the partition 4 corresponding to the memory spring 6, a heat-conducting ring 10 is provided on the outer surface of the memory spring 6, a connecting plate 9 is fixedly installed on the lower end of the heat-conducting ring 10, a heat-conducting plate 11 is provided on the lower side of the partition 4, and the connecting plate 9 is fixedly connected to the heat-conducting plate 11 through the notch 7. The trigger mechanism also includes an electric contact 15 fixedly installed on the right end of the memory spring 6, a striker 16 fixedly installed on the right end of the electric contact 15, a support plate 17 is provided on the right side of the striker 16, and a support plate 17 is provided on the left side of the support plate 17. A slide rail 12 is provided, and the slide rail 12 and the support plate 17 are fixedly connected to the partition 4. The electric contact 15 is slidably connected to the inside of the slide rail 12, and the electric contact sleeve 18 is fixedly installed on the upper side of the left end surface of the support plate 17. Specifically: when the electrical equipment 3 catches fire, the temperature rises rapidly, and is transmitted to the heat-conducting ring 10 through the heat-conducting plate 11, and then the memory spring 6 is heated and stretched, thereby pushing the slider 8 to move to the right inside the slide rail 12, and at the same time pushing the electric contact 15 and the striker 16 to move to the right, so that the electric contact 15 and the electric contact sleeve 18 contact each other, and then the circuit of the alarm 13 is connected, so that the alarm 13 sounds an alarm.

[0038] Specific examples Figures 1 to 9As shown, the trigger mechanism 2 includes a support plate 17, the right end surface of which corresponds to the striker 16 and is provided with a notch 29, a support plate 20 is provided on the right side of the notch 19, a spring 21 is fixedly installed between the support plate 20 and the inner arm of the brand distribution cabinet body 1, a connecting rod 22 is fixedly installed at the front end of the support plate 20, a hammer 23 is fixedly installed at the front end of the connecting rod 22, a slide rail 24 is provided on the lower side of the hammer 23, the hammer 23 is slidably connected to the inside of the slide rail 24, and the slide rail 24 is fixedly connected to the partition 4, and the trigger mechanism 2 also includes a connecting rod A fixing groove 26 is provided on the outer surface of 22 corresponding to the slot 2 19, and a fixing pin 25 is inserted into the inside of the fixing groove 26. A mounting plate is fixedly installed on the left end of the fixing pin 25, and the fixing pin 25 is slidably connected to the inner wall of the distribution cabinet main board. Specifically: the striker 16 will hit the fixing pin 25 through the slot 2 19, so that the fixing pin 25 is pushed away from the fixing groove 26, and then the contact is restricted to the striker 23, and under the action of the spring 1 21, the striker 23 is installed toward the door panel 2, and then the door panel 2 is opened to prevent the door panel 2 from being unable to open when a fire occurs, and the firefighters are unable to extinguish the fire.

[0039] Specific examples Figures 1 to 9 As shown, the power-off mechanism includes a circuit 1 28 fixedly installed on the lower side of the right end face of the electrical device 3, a circuit 2 29 is provided on the right side of the circuit 1 28, a connecting sleeve 31 is slidably connected to the outer surface of the circuit 1 28, a magnet 32 is fixedly installed on the left end of the connecting sleeve 31, an electromagnet 30 is provided on the left side of the magnet 32, the electromagnet 30 is fixedly connected to the electrical device 3, a spring 2 33 is fixedly installed gradually between the electromagnet 30 and the magnet 32, a connecting plate 34 is fixedly installed on the inner right end of the connecting sleeve 31, and the other end of the connecting sleeve 31 is slidably connected to the outer surface of the circuit 2 29. Specifically: the contact between the electric contact 15 and the electric contact sleeve 18 will cause the electromagnet 30 to generate magnetic force, attracting the magnet 32, and then the magnet 32 will carry the connecting sleeve 31 away from the circuit 2 29, thereby disconnecting the connection between the connecting sleeve 31 and the circuit 2 29, thereby disconnecting the circuit connection of the electrical device 3.

[0040] Specific examples Figures 1 to 9As shown, the fire extinguishing mechanism includes a connecting plate 2 35 fixedly installed at the front end of the slider 8, a reagent kit 1 36 fixedly installed on the front side of the upper end of the partition 4, and a reagent kit 2 37 fixedly installed on the lower end surface of the partition 4 corresponding to the reagent kit 1 36. The partition 4 is provided with a slide groove 14 corresponding to the reagent kit 1 36 and the reagent kit 2 37. The inside of the slide groove 14 is slidably connected with a slide plate 39, and the connecting plate 2 35 is fixedly connected to the slide plate 39. Sodium bicarbonate is provided inside the reagent kit 1 36, and magnesium stearate is provided inside the reagent kit 2 37. Specifically: when the slider 8 moves, the slide plate 39 will be moved by the connecting plate 2 35, so that the reagent kit 1 36 and the reagent kit 2 37 are connected to each other, and then the sodium bicarbonate and magnesium stearate contact and react with each other to produce a large amount of carbon dioxide gas, which is sprayed from the exhaust hole 38 to extinguish the fire of the electrical equipment 3.

[0041] A method for identifying an overheating fault in a high-voltage distribution cabinet is characterized by comprising the following steps:

[0042] S1: Temperature trigger: When the electrical device 3 heats up and catches fire, the heat conducting plate 11 causes the memory spring 6 to expand, thereby pushing the slider 8 to slide on the slide rail, so that the electric contact 15 and the electric contact sleeve 18 come into contact with each other, thereby triggering the alarm 13 to sound an alarm;

[0043] S2: Interlock triggering: As the slider 8 slides, the striker 16 strikes the fixing pin 25, which in turn causes the fixing pin 25 to leave the fixing slot 26, thereby releasing the fixation of the striker 23. Under the action of the spring 1 21, the striker 23 slides inside the slide rail 24 and strikes the door panel 2, thereby opening the door panel 2.

[0044] S3: Electrical fire extinguishing: As the slider 8 moves, it opens the slide plate 39 between the reagent box 1 36 and the reagent box 2 37, causing the reagents in the reagent box 1 36 and the reagent box 2 37 to come into contact and react with each other, thereby generating a large amount of carbon dioxide and dry powder, which are ejected from the exhaust hole 38 to extinguish the fire of the electrical equipment 3;

[0045] S4: Electrical appliance power off: When the electrical contact 15 is connected to the electrical contact sleeve 18, the electromagnet 30 generates magnetic force to attract the magnet 32, so that the magnet 32 carries the connecting sleeve 31 away from line 2 29, thereby disconnecting line 1 28 from line 2 29.

[0046] When the present invention is used, when the electrical equipment 3 catches fire, the temperature rises rapidly, and is transferred to the heat-conducting ring 10 through the heat-conducting plate 11, and then the memory spring 6 is heated and stretched, thereby pushing the slider 8 to move to the right inside the slide rail 12, and at the same time pushing the electric contact 15 and the striker 16 to move to the right, so that the electric contact 15 and the electric contact sleeve 18 contact each other, and then connecting the circuit of the alarm 13, so that the alarm 13 sounds an alarm and warns, and then the striker 16 will hit the fixed pin 25 through the slot 2 19, so that the fixed pin 25 is pushed away from the fixed slot 26, and then the contact is restricted to the striker 23, and under the action of the spring 1 21, the striker 23 is installed toward the door panel 2, and then the door panel 2 is opened to avoid fire. When a fire occurs, the door panel 2 cannot be opened and the firefighters cannot extinguish the fire. Secondly, the contact between the electric contact 15 and the electric contact sleeve 18 will cause the electromagnet 30 to generate magnetic force, attracting the magnet 32, and then the magnet 32 will carry the connecting sleeve 31 away from the line 2 29, thereby disconnecting the connection between the connecting sleeve 31 and the line 2 29, and thus disconnecting the circuit connection of the electrical device 3. Secondly, when the slider 8 moves, it will carry the slide plate 39 to move through the connecting plate 2 35, so that the test kit 1 36 and the test kit 2 37 are connected to each other, and then the sodium bicarbonate and magnesium stearate contact each other to react and produce a large amount of carbon dioxide gas, which is sprayed from the exhaust hole 38 to extinguish the fire of the electrical device 3.

[0047] The electrical components appearing in this article are all connected to the external main controller and 220V AC power through a transformer, and the main controller can be a conventional known device that controls a computer, etc. The product model provided by the present invention is only used for the purpose of this technical solution based on the structural characteristics of the product. The product will be adjusted and modified after purchase to make it more compatible with and in line with the technical solution of the present invention. It is a technical solution for the best application of this technical solution. The model of its product can be replaced and modified according to the technical parameters required. It is well known to technical personnel in this field. Therefore, technical personnel in this field can clearly obtain the corresponding use effect through the technical solution provided by the present invention.

[0048] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for identifying overheating faults of a high-voltage distribution cabinet, comprising a distribution cabinet body (1), characterized in that: The front end face of the power distribution cabinet body (1) is hinged with a door panel (2) on the left, the inner lower end face of the power distribution cabinet body (1) is fixedly mounted with an electrical device (3), a partition (4) is provided on the upper side of the electrical device (3), the partition (4) is fixedly connected to the power distribution cabinet body (1), a trigger mechanism 1 is provided on the left side of the upper end face of the partition (4), a trigger mechanism 2 is provided on the right side of the trigger mechanism, a fire extinguishing mechanism is provided on the front side of the trigger mechanism 1, and a power-off mechanism is provided on the right side of the electrical device (3); The trigger mechanism 1 triggers the fire alarm and triggers the trigger mechanism 2, the power-off mechanism and the fire-extinguishing mechanism. When the trigger mechanism 2 is triggered, the door panel (2) is knocked open. When the fire-extinguishing mechanism is triggered, a large amount of carbon dioxide gas is sprayed to prevent the electrical equipment (3) from burning. When the power-off mechanism is triggered, the power connection between the external power supply and the electrical equipment (3) is disconnected. The trigger mechanism comprises a fixed block (5) fixedly mounted on the left side of the upper end of the partition (4), a memory spring (6) fixedly mounted on the right end of the fixed block (5), a slot (7) corresponding to the memory spring (6) formed on the partition (4), a heat-conducting ring (10) sleeved on the outer surface of the memory spring (6), a connecting plate (9) fixedly mounted on the lower end of the heat-conducting ring (10), a heat-conducting plate (11) provided on the lower side of the partition (4), and the connecting plate (9) fixedly connected to the heat-conducting plate (11) through the slot (7); The trigger mechanism 1 also includes an electric contact (15) fixedly mounted on the right end of the memory spring (6), a striker (16) fixedly mounted on the right end of the electric contact (15), a support plate 1 (17) provided on the right side of the striker (16), a slide rail 1 (12) provided on the left side of the support plate 1 (17), the slide rail 1 (12) and the support plate 1 (17) both being fixedly connected to the partition (4), the electric contact (15) being slidably connected to the inside of the slide rail 1 (12), and an electric contact sleeve (18) fixedly mounted on the upper side of the left end surface of the support plate 1 (17); The trigger mechanism 2 includes a support plate 1 (17) having a notch 2 (19) on the right end surface thereof corresponding to the striker (16), a support plate 2 (20) being provided on the right side of the notch 2 (19), a spring 1 (21) being fixedly installed between the support plate 2 (20) and the inner arm of the power distribution cabinet body (1), a connecting rod (22) being fixedly installed at the front end of the support plate 2 (20), a hammer (23) being fixedly installed at the front end of the connecting rod (22), a slide rail 2 (24) being provided on the lower side of the hammer (23), the hammer (23) being slidably connected to the inside of the slide rail 2 (24), and the slide rail 2 (24) being fixedly connected to the partition (4).

2. The device for identifying overheating faults of a high-voltage power distribution cabinet according to claim 1, characterized in that: The trigger mechanism 2 also includes a fixing groove (26) formed on the outer surface of the connecting rod (22) corresponding to the second notch (19), a fixing pin (25) is inserted into the interior of the fixing groove (26), a mounting plate is fixedly installed on the left end of the fixing pin (25), and the fixing pin (25) is slidably connected to the inner wall of the mainboard of the power distribution cabinet.

3. The device for identifying overheating faults of a high-voltage power distribution cabinet according to claim 2, characterized in that: The power-off mechanism comprises: a circuit 1 (28) fixedly mounted on the lower side of the right end surface of the electrical device (3); a circuit 2 (29) is arranged on the right side of the circuit 1 (28); a connecting sleeve (31) is slidably connected to the outer surface of the circuit 1 (28); a magnet (32) is fixedly mounted on the left end of the connecting sleeve (31); an electromagnet (30) is arranged on the left side of the magnet (32); the electromagnet (30) is fixedly connected to the electrical device (3); a spring 2 (33) is gradually fixedly mounted between the electromagnet (30) and the magnet (32); a connecting plate (34) is fixedly mounted on the inner right end of the connecting sleeve (31); and the other end of the connecting sleeve (31) is slidably connected to the outer surface of the circuit 2 (29).

4. The device for identifying overheating faults of a high-voltage power distribution cabinet according to claim 3, characterized in that: The fire extinguishing mechanism includes a second connecting plate (35) fixedly mounted on the front end of the slider (8), a reagent box (36) fixedly mounted on the front side of the upper end of the partition (4), a reagent box (37) fixedly mounted on the lower end of the partition (4) corresponding to the reagent box (36), a sliding groove (14) is provided on the partition (4) corresponding to the reagent box (36) and the reagent box (37), a slide plate (39) is slidably connected inside the sliding groove (14), and the second connecting plate (35) is fixedly connected to the slide plate (39).

5. The device for identifying overheating faults of a high-voltage power distribution cabinet according to claim 4, characterized in that: The first test kit (36) is provided with sodium bicarbonate, and the second test kit (37) is provided with magnesium stearate.

6. A method for identifying overheating faults in a high-voltage distribution cabinet, applicable to the identification device according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: Temperature trigger: When the electrical device (3) heats up and catches fire, the memory spring (6) is heated and stretched through the heat conducting plate (11), thereby pushing the slider (8) to slide on the slide rail, thereby causing the electric contact (15) and the electric contact sleeve (18) to contact each other, thereby triggering the alarm (13) to sound an alarm; S2: Interlocking trigger: When the slider (8) slides, the striker (16) strikes the fixed pin (25), which then causes the fixed pin (25) to leave the fixed slot (26), and then releases the fixation of the striker (23). Under the action of the spring (21), the striker (23) slides inside the second slide rail (24) and strikes the door panel (2), thereby opening the door panel (2); S3: Electric appliance fire extinguishing: When the slider (8) moves, the slide plate (39) between the reagent box 1 (36) and the reagent box 2 (37) is opened, thereby causing the reagents in the reagent box 1 (36) and the reagent box 2 (37) to come into contact with each other and react, thereby generating a large amount of carbon dioxide and dry powder and ejecting them from the exhaust hole (38), thereby extinguishing the fire of the electric appliance (3); S4: Electrical appliance power off: When the electric contact (15) is connected to the electric contact sleeve (18), the electromagnet (30) generates magnetic force to attract the magnet (32), so that the magnet (32) carries the connecting sleeve (31) away from the line 2 (29), thereby disconnecting the connection between the line 1 (28) and the line 2 (29).

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