Electrical fire early warning device and method for low-power wide area network

Abstract

The invention relates to the technical field of fire early warning devices, in particular to an electrical fire early warning device and method for a low-power wide area network, and the device comprises an electrical cabinet, an early warning structure, a wire arrangement structure, an installation structure, an isolation structure, and an opening and closing structure. The isolation structure is rapidly installed through the installation structure, the early-warned electrical cabinet is isolated through the isolation structure, fire inside the early-warned electrical cabinet is prevented from being expanded, and meanwhile subsequent safe fire extinguishing is facilitated; the current in the electrical cabinet is monitored through the early warning structure, so that early electrical hidden dangers in the electrical cabinet can be detected in time, and meanwhile, the installation efficiency of the three-phase current transformer is improved; according to the electrical cabinet, cables in the electrical cabinet are arranged through the cable arrangement structure, meanwhile, the angle of the cable arrangement structure is convenient to adjust, the bending loss of wires is reduced, the service life is prolonged, and meanwhile the fire spreading speed is reduced; the two side doors of the electrical cabinet can be quickly opened through the opening and closing structure, so that the electrical equipment can be quickly and timely rescued, and the economic loss is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fire early warning devices, and in particular to an electrical fire early warning device and method for a low-power wide area network. Background Art

[0002] Low-power wide area network (LPWAN) is a communication network technology that enables devices to communicate over long distances with extremely low power consumption by optimizing signal transmission protocols and power consumption management. In modern society, electrical fires have always been a major threat to public and property safety in the operation of LPWAN power systems.

[0003] However, some traditional electrical fire warning devices only monitor overload current through thermal relays, but fail to effectively monitor residual current, making it difficult to detect fire hazards caused by ground faults. Furthermore, the fixed installation method of traditional three-phase current transformers cannot be flexibly adjusted according to actual wiring conditions, resulting in large measurement errors and prone to false alarms or missed alarms.

[0004] Existing devices are relatively passive in their response to fires, relying solely on power outages to prevent the fault from spreading. They lack a mechanism for actively isolating the fire. When a short circuit ignites inside an electrical cabinet, traditional devices are unable to quickly form a physical barrier, allowing the fire to spread quickly to adjacent equipment or areas, expanding the scope of the accident. Furthermore, the device's structural design fails to consider firefighting convenience, and the cabinet door's complex opening method prevents firefighters from quickly approaching the fire source, delaying the optimal firefighting opportunity.

[0005] The wiring layout inside the electrical cabinet lacks standardized management, and cross-entanglement of cables is common. This not only increases the difficulty of installing the current transformer, but may also accelerate the aging of the insulation layer due to excessive bending of the wires. The temperature at the bend of the cable is higher than the normal part, which significantly increases the risk of short circuit. In addition, the chaotic wiring layout will accelerate the spread of fire, making fire fighting difficult. Summary of the Invention

[0006] In view of the problems in the prior art, the present invention provides an electrical fire early warning device and method for a low-power wide area network.

[0007] The technical solution adopted by the present invention to solve its technical problem is: an electrical fire warning device for low-power wide area network, including an electrical cabinet, an early warning structure provided inside the electrical cabinet, a wire management structure provided on the early warning structure, a mounting structure provided on the top of the electrical cabinet, an isolation structure installed on the top of the electrical cabinet through the mounting structure, an opening and closing structure provided on the electrical cabinet, a warning light provided on the mounting structure, and a backup power supply;

[0008] The mounting structure includes an isolation frame, a slot, a connecting pin and a mounting frame. The top of the electrical cabinet is fixedly connected to the isolation frame, the isolation frame is provided with four slots, and the mounting frame is provided with four connecting pins, which are plugged into the slots.

[0009] The isolation structure includes a retractable roller and an explosion-proof blanket. Four retractable rollers are rotatably connected to the mounting frame. The four retractable rollers are arranged in a rectangular array. An explosion-proof blanket is wrapped around the retractable roller. The bottom end of the explosion-proof blanket is fixedly connected to a counterweight bar. Four guide shafts for guiding the explosion-proof blanket are fixedly connected to the mounting frame. Each of the two ends of the retractable roller is fixedly connected to a first gear. The first gears are all helical gears. Two adjacent first gears are meshed with each other. One of the retractable rollers is fixedly connected to a first pulley. The mounting frame is fixedly connected to a motor. The output end of the motor is fixedly connected to a second pulley. The first pulley and the second pulley are driven by a belt.

[0010] Specifically, a screw is rotatably connected to the isolation frame, and the thread directions of the two ends of the screw are opposite. Two sliding bars are symmetrically threaded on the screw, and the sliding bars are slidably connected to the isolation frame. Two blocks are fixedly connected to each of the sliding bars, and a slot is provided on the connecting foot, and the block is engaged with the slot.

[0011] Specifically, the end of the screw is slidably connected to a rotating rod with an "I"-shaped cross-section, two guide rods are fixedly connected to the isolation frame, the slide bar is slidably connected to the guide rods, and the mounting frame is fixedly connected to a support plate with a U-shaped cross-section, and a warning light and a backup power supply are installed on the support plate.

[0012] Specifically, the early warning structure includes a template and a mounting plate. Two templates are fixedly connected to the interior of the electrical cabinet. The two templates are fixedly connected to the mounting plates. A zero-sequence current transformer, an isolating switch, a residual current electrical fire monitoring detector, a controller and a mounting rail are fixedly connected to the mounting plate. The cross-section of the mounting rail is a T-shaped structure. Three sliding sleeves are slidably connected to the mounting rail. A three-phase current transformer is fixedly connected to the sliding sleeve. Three groups of linear array limiting holes are provided on the mounting rail. A first fixed block is fixedly connected to each of the three-phase current transformers. A fixed sleeve is fixedly connected to the first fixed block. A limiting rod with a "cross"-shaped cross-section is slidably connected to the interior of the fixed sleeve. The limiting rod is engaged with the limiting hole. A first spring is fixedly connected between the limiting rod and the fixed sleeve. A connecting rod is rotatably connected to the limiting rod.

[0013] Specifically, the wire management structure includes a fixed shaft and a rotating frame, one of the templates is fixedly connected to a fixed shaft, a rotating frame with a U-shaped cross-section is rotatably connected to the fixed shaft, a lower wire clamp is fixedly connected to the rotating frame, two guide bars are fixedly connected to the rotating frame, an upper wire clamp is slidably connected to the two guide bars, four second fixed blocks are fixedly connected to the upper wire clamp, four third fixed blocks are fixedly connected to the lower wire clamp, a sliding rod with a T-shaped cross-section is fixedly connected to the second fixed block, the sliding rod is slidably connected to the third fixed block, and a second spring is fixedly connected between the sliding rod and the third fixed block.

[0014] Specifically, the rotating frame is provided with a limiting groove with a regular hexagonal cross-section, and the other template is slidably connected to a connecting shaft with a T-shaped cross-section. The connecting shaft is fixedly connected to a limiting block with a regular hexagonal cross-section. The limiting block is plugged into the limiting groove, and a pull ring is fixedly connected to the limiting block. A third spring is fixedly connected between the connecting shaft and the template.

[0015] Specifically, a fixing rod is fixedly connected to the template, and the connecting shaft is slidably connected to the fixing rod.

[0016] Specifically, the opening and closing structure includes a rotating shaft and a side door. Two rotating shafts are fixedly connected to the electrical cabinet, and the side door is rotatably connected to the rotating shaft. Two mounting blocks are fixedly connected to each side of the electrical cabinet, and a fourth spring is fixedly connected to the mounting block. The end of the fourth spring contacts the inner wall of the side door. Two fixed seats are fixedly connected to the top of the electrical cabinet, and a mounting shaft is rotatably connected to the fixed seat. A stop block is fixedly connected to each end of the mounting shaft, and the stop block contacts the outer wall of the side door.

[0017] Specifically, a second gear is fixedly connected to the mounting shaft, two slide rails are fixedly connected to the electrical cabinet, a push bar with a T-shaped cross-section is slidably connected between the two slide rails, a rack is fixedly connected to the push bar, and the rack is engaged with the second gear, a fixed plate is fixedly connected to the electrical cabinet, a push rod with a T-shaped cross-section is fixedly connected to the push bar, the push rod is slidably connected to the fixed plate, and a tension spring is fixedly connected between the fixed plate and the push bar.

[0018] A method for an electrical fire warning device for a low-power wide area network comprises the following steps:

[0019] S1: First, install the warning structure inside the electrical cabinet, adjust the angle of the wire management structure, organize the warning structure and the wiring inside the electrical cabinet, and install the isolation structure on the top of the electrical cabinet through the mounting structure;

[0020] S2: When an abnormal current occurs inside the electrical cabinet, the early warning structure can quickly cut off the power supply, providing a timely early warning of electrical fires, while also alerting nearby operators through the warning light on the mounting structure;

[0021] S3: When the circuit inside the electrical cabinet has overheated and caught fire, explosion-proof blankets are lowered around the electrical cabinet to prevent the fire from spreading. When the operator arrives near the electrical cabinet to prepare to extinguish the fire, if the fire inside is not large, the explosion-proof blanket rises and the operator quickly opens the cabinet doors on both sides of the electrical cabinet through the opening and closing structure to facilitate rapid fire extinguishing operations inside the electrical cabinet. If the fire inside is large, the fire can be extinguished directly in the electrical cabinet surrounded by the isolation structure.

[0022] The beneficial effects of the present invention are:

[0023] (1) The present invention describes an electrical fire warning device and method for a low-power wide area network. An installation structure is provided on the electrical cabinet, and an isolation structure is provided on the installation structure. The isolation structure is quickly installed through the installation structure, and the electrical cabinet that has been warned is isolated through the isolation structure, thereby avoiding the expansion of the fire inside the electrical cabinet after the warning, reducing fire losses, and facilitating subsequent safe fire extinguishing.

[0024] (2) The present invention describes an electrical fire warning device and method for a low-power wide area network. An early warning structure is provided inside the electrical cabinet, and the internal current of the electrical cabinet is monitored by the early warning structure. This facilitates timely detection of early electrical hazards inside the cabinet and improves the installation efficiency of the three-phase current transformer.

[0025] (3) The present invention describes an electrical fire warning device and method for a low-power wide area network. The warning structure is provided with a wire management structure, which is used to organize the cables inside the electrical cabinet. At the same time, it is easy to adjust the angle of the wire management structure, thereby reducing the bending loss of the wires and increasing the service life. At the same time, it reduces the spread of fire and reduces the speed of fire spread.

[0026] (4) The present invention describes an electrical fire warning device and method for a low-power wide area network. The electrical cabinet is provided with an opening and closing structure, and the two side doors of the electrical cabinet are quickly opened through the opening and closing structure, so that the open fire inside the electrical cabinet can be quickly and timely extinguished, and the electrical equipment can be rescued, thereby reducing economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings and examples.

[0028] Figure 1 A schematic diagram of the overall structure of a preferred embodiment of an electrical fire warning device for a low-power wide area network provided by the present invention;

[0029] Figure 2 for Figure 1 An enlarged schematic diagram of the structure of section A is shown;

[0030] Figure 3 This is a schematic diagram of the connection structure between the mounting frame and the support plate of the present invention;

[0031] Figure 4 This is a schematic diagram of the connection structure between the installation frame and the isolation structure of the present invention;

[0032] Figure 5 for Figure 4 An enlarged schematic diagram of the structure of part B is shown;

[0033] Figure 6 This is a schematic diagram of the connection structure between the electrical cabinet and the early warning structure of the present invention;

[0034] Figure 7 for Figure 6 The enlarged schematic diagram of the C-section structure is shown;

[0035] Figure 8 for Figure 6 The enlarged schematic diagram of the D part structure is shown;

[0036] Figure 9 This is a schematic diagram of the connection structure between the mounting plate and the residual current type electrical fire monitoring detector of the present invention;

[0037] Figure 10 for Figure 9 An enlarged schematic diagram of the structure of section E is shown;

[0038] Figure 11 for Figure 9 The enlarged schematic diagram of the F part structure is shown;

[0039] Figure 12 This is a schematic diagram of the connection structure between the mounting plate and the zero-sequence current transformer of the present invention;

[0040] Figure 13 for Figure 12 The enlarged schematic diagram of the G-section structure is shown;

[0041] Figure 14 Schematic diagram of the connection structure between the template and the wire management structure of the present invention;

[0042] Figure 15 A schematic diagram of the connection structure between the mounting plate and the mounting rail of the present invention;

[0043] Figure 16 for Figure 15 The enlarged schematic diagram of the H part structure is shown;

[0044] Figure 17 Schematic diagram of the connection structure between the screw and the slide bar of the present invention.

[0045] In the figure: 1. Electrical cabinet; 2. Early warning structure; 201. Plate; 202. Mounting plate; 203. Zero-sequence current transformer; 204. Disconnector; 205. Residual current type electrical fire monitoring detector; 206. Controller; 207. Mounting rail; 208. Sliding sleeve; 209. Three-phase current transformer; 210. First fixing block; 211. Fixing sleeve; 212. Limit rod; 213. Limit hole; 214. First spring; 215, connecting rod; 3, wire management structure; 301, fixed shaft; 302, rotating frame; 303, lower wire clamp; 304, guide bar; 305, upper wire clamp; 306, second fixed block; 307, sliding rod; 308, third fixed block; 309, second spring; 310, limit block; 311, limit groove; 312, pull ring; 313, connecting shaft; 314, third spring; 315, fixed rod; 4 , mounting structure; 401, isolation frame; 402, slot; 403, connecting foot; 404, mounting frame; 405, screw; 406, slide; 407, block; 408, slot; 409, rotating rod; 410, guide rod; 411, support plate; 5, isolation structure; 501, retractable roller; 502, explosion-proof blanket; 503, counterweight bar; 504, guide shaft; 505, first gear; 506, first pulley ; 507, motor; 508, second pulley; 6, opening and closing structure; 601, rotating shaft; 602, side door; 603, mounting block; 604, fourth spring; 605, fixed seat; 606, mounting shaft; 607, stop block; 608, second gear; 609, slide rail; 610, push bar; 611, rack; 612, fixing plate; 613, tension spring; 614, push rod; 7, warning light; 8, backup power supply. DETAILED DESCRIPTION

[0046] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0047] like Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 14 and Figure 17As shown, the electrical fire warning device for low-power wide area network according to the present invention includes an electrical cabinet 1, an early warning structure 2 provided inside the electrical cabinet 1, a wire management structure 3 provided on the early warning structure 2, a mounting structure 4 provided on the top of the electrical cabinet 1, an isolation structure 5 mounted on the top of the electrical cabinet 1 through the mounting structure 4, an opening and closing structure 6 provided on the electrical cabinet 1, a warning light 7 provided on the mounting structure 4, and a backup power supply 8;

[0048] The mounting structure 4 includes an isolation frame 401, a slot 402, a connecting foot 403 and a mounting frame 404. The top of the electrical cabinet 1 is fixedly connected to the isolation frame 401, and the isolation frame 401 is provided with four slots 402. The mounting frame 404 is provided with four connecting feet 403, and the connecting feet 403 are plugged into the slots 402; the isolation structure 5 includes a retractable roller 501 and an explosion-proof blanket 502. The mounting frame 404 is rotatably connected to four retractable rollers 501, and the four retractable rollers 501 are arranged in a rectangular array. An explosion-proof blanket 502 is wound around the retractable roller 501, and a counterweight bar 503 is fixedly connected to the bottom end of the explosion-proof blanket 502. Four guide shafts 504 for guiding the explosion-proof blanket 502 are fixedly connected to the mounting frame 404, and each of the two ends of the retractable roller 501 is fixedly connected to one The first gears 505 are all helical gears, and two adjacent first gears 505 are meshed with each other. A first pulley 506 is fixedly connected to one of the retracting rollers 501, and a motor 507 is fixedly connected to the mounting frame 404. The output end of the motor 507 is fixedly connected to a second pulley 508, and the first pulley 506 and the second pulley 508 are driven by a belt. The power of the motor 507 is turned on (the backup power supply 8 supplies power to the motor 507), and the motor 507 drives the retracting roller 501 to rotate through the second pulley 508, the belt and the first pulley 506. The meshing of adjacent first gears 505 ensures that the retracting rollers 501 on the four sides are synchronized, and the explosion-proof blanket 502 rises and falls smoothly along the guide shaft 504. The counterweight bar 503 ensures that the blanket surface is vertical, thereby completing the isolation of the electrical cabinet 1.

[0049] The isolation frame 401 is rotatably connected to a screw rod 405, the two ends of the screw rod 405 have opposite thread directions, the screw rod 405 is symmetrically threaded with two slide bars 406, the slide bars 406 are slidably connected to the isolation frame 401, and each of the slide bars 406 is fixedly connected to two blocks 407, and a slot 408 is provided on the connecting foot 403, and the block 407 is engaged with the slot 408; the end of the screw rod 405 is slidably connected to a rotating rod 409 with an "I"-shaped cross section, and the isolation frame 401 is fixedly connected to two The guide rod 410, the slide bar 406 is slidably connected to the guide rod 410, and the mounting frame 404 is fixedly connected to a support plate 411 with a U-shaped cross-section, and the support plate 411 is installed with a warning light 7 and a backup power supply 8; the connecting foot 403 of the mounting frame 404 is inserted into the slot 402 of the isolation frame 401, and the rotating rod 409 is rotated to drive the screw 405 to rotate. The reverse threads at both ends of the screw 405 drive the slide bar 406 to slide along the guide rod 410, so that the block 407 is embedded in the slot 408 of the connecting foot 403, thereby completing the fixation of the mounting frame 404.

[0050] Specifically, such as Figure 1 、 Figure 2 、 Figure 6 、 Figure 9 、 Figure 12 、 Figure 15 and Figure 16As shown, the early warning structure 2 includes a template 201 and a mounting plate 202. Two templates 201 are fixedly connected to the interior of the electrical cabinet 1. The two templates 201 are fixedly connected to the mounting plates 202. The mounting plates 202 are fixedly connected to the zero-sequence current transformer 203, the isolating switch 204, the residual current type electrical fire monitoring detector 205, the controller 206 and the mounting rail 207. The template 201 is fixed to the inner wall of the electrical cabinet 1, and the mounting plate 202 is fixed to the template 201. The zero-sequence current transformer 203, the isolating switch 204, the residual current type electrical fire monitoring detector 205 and the controller 206 are installed in sequence. The mounting rail 207 has a T-shaped cross-section. Three sliding sleeves 208 are slidably connected to the mounting rail 207. A three-phase current transformer 209 is fixedly connected to the sliding sleeve 208. The mounting rail 207 is provided with three groups of linear array limiting holes 213. Each of the three-phase current transformers 209 is fixedly connected to a first fixed block 210. A fixed sleeve 211 is fixedly connected to the first fixed block 210. A limiting rod 212 with a "cross" cross-section is slidably connected inside the fixing sleeve 211. The limiting rod 212 is engaged with the limiting hole 213, and the limiting rod 212 is fixedly connected to the fixing sleeve 211. There is a first spring 214, and the limit rod 212 is rotatably connected to the connecting rod 215. The three-phase current transformer 209 is sleeved on the T-shaped mounting rail 207 through the sliding sleeve 208, and the position is adjusted by sliding along the track. When the sliding sleeve 208 is slid, the connecting rod 215 is pulled. After moving to the appropriate position, the first spring 214 provides a reset force to drive the limit rod 212 to make it snap into the limit hole 213 to fix the transformer position. The zero-sequence current transformer 203 is sleeved on the outside of the three-phase cable to monitor the three-phase current vector sum for detecting ground faults. The three-phase current transformer 209 is respectively sleeved on the A, B, and C three-phase conductors to independently monitor the current of each phase for overload and short circuit. Symmetrical fault detection is possible, the position of the three-phase current transformer 209 is easy to adjust, which facilitates the threading operation and makes the wiring more reasonable. The residual current electrical fire monitoring detector 205 cooperates with the zero-sequence current transformer 203 to set the leakage threshold and warn of electrical fire hazards. The controller 206 receives sensor data, analyzes and processes it, and then issues control instructions. The zero-sequence current transformer 203, the three-phase current transformer 209 and the residual current electrical fire monitoring detector 205 monitor the current situation in the electrical cabinet 1 in real time. When a current abnormality occurs, the controller 206 controls the isolation switch 204 to quickly cut off the power and triggers the warning light 7 to alert nearby operators.

[0051] Specifically, such as Figure 1 、 Figure 12 、 Figure 13 and Figure 14As shown, the cable management structure 3 includes a fixed shaft 301 and a rotating frame 302, wherein one of the templates 201 is fixedly connected to a fixed shaft 301, and a rotating frame 302 with a U-shaped cross section is rotatably connected to the fixed shaft 301, and a lower wire clamp 303 is fixedly connected to the rotating frame 302, and two guide bars 304 are fixedly connected to the rotating frame 302, and an upper wire clamp 305 is slidably connected to the two guide bars 304, and four second fixed blocks 306 are fixedly connected to the upper wire clamp 305, and four third fixed blocks 306 are fixedly connected to the lower wire clamp 303. The second fixed block 306 is fixedly connected to a sliding rod 307 with a T-shaped cross section, and the sliding rod 307 is slidably connected to the third fixed block 308. A second spring 309 is fixedly connected between the sliding rod 307 and the third fixed block 308; the rotating frame 302 is provided with a limiting groove 311 with a regular hexagonal cross section, and the other template 201 is slidably connected to a connecting shaft 313 with a T-shaped cross section, and the connecting shaft 313 is fixedly connected to a limiting block 310 with a regular hexagonal cross section, and the limiting block 310 is plugged into the limiting groove 311. The limit block 310 is fixedly connected to a pull ring 312, and a third spring 314 is fixedly connected between the connecting shaft 313 and the template 201; a fixing rod 315 is fixedly connected to the template 201, and the connecting shaft 313 and the fixing rod 315 are slidably connected. When it is necessary to organize the wires inside the electrical cabinet 1, the pull ring 312 is pulled to drive the limit block 310 to slide, and the limit block 310 is no longer engaged with the limit groove 311. At the same time, the connecting shaft 313 slides and the third spring 314 is compressed. At this time, the rotating frame 302 can be rotated, and the rotating frame 302 The rotating frame 302 is rotated on the fixed shaft 301 and the connecting shaft 313 to a suitable angle, the pull ring 312 is released, and the third spring 314 is reset, thereby driving the connecting shaft 313 to slide. The connecting shaft 313 slides to insert the limit block 310 into the limit groove 311 for fixation. The distance between the upper wire clamp 305 and the lower wire clamp 303 is adjusted by the slide rod 307, and the second spring 309 is used to clamp the cable to complete the line arrangement. The angle can be adjusted to adapt to different cable directions, reduce the bending loss of the wires, extend the service life, standardize the line layout, and reduce the speed of fire spreading along the line.

[0052] Specifically, such as Figure 1 、 Figure 3 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 11As shown, the opening and closing structure 6 includes a rotating shaft 601 and a side door 602. The electrical cabinet 1 is fixedly connected to two rotating shafts 601, and the rotating shaft 601 is rotatably connected to the side door 602. Two mounting blocks 603 are fixedly connected to both sides of the electrical cabinet 1. The mounting blocks 603 are fixedly connected to a fourth spring 604. The end of the fourth spring 604 contacts the inner wall of the side door 602. The top of the electrical cabinet 1 is fixedly connected to two fixing seats 605. The fixing seats 605 are rotatably connected to the mounting shaft 606. The two ends of the mounting shaft 606 are each fixedly connected to a stopper 607, and the stopper 607 conflicts with the outer wall of the side door 602; the mounting shaft 606 is fixedly connected to a second gear 608, and the electrical cabinet 1 is fixedly connected to two slide rails 609, and a push bar 610 with a T-shaped cross section is slidably connected between the two slide rails 609, and the push bar 610 is fixedly connected to a rack 611, and the rack 611 is meshed with the second gear 608, and the electrical cabinet 1 is fixedly connected to a fixed plate 612, and the push bar 610 is fixedly connected to The push rod 614 has a T-shaped cross section, and the push rod 614 is slidably connected to the fixed plate 612. A tension spring 613 is fixedly connected between the fixed plate 612 and the push strip 610. Under normal conditions, the block 607 contacts the outer wall of the side door 602 to restrict the opening of the side door 602. When extinguishing a fire, in order to avoid the trouble of unlocking the front and rear cabinet doors due to overheating, the fire fighter can choose to retract the isolation structure 5 according to the actual situation, and then press the push rod 614 at the rear of the electrical cabinet 1. The push rod 614 pushes the push strip 610 to slide along the slide rail 609, and the rack 611 drives the second The second gear 608 rotates, thereby driving the installation shaft 606 to rotate. The rotation of the installation shaft 606 lifts the stopper 607, and the side door 602 automatically pops open under the action of the fourth spring 604, thereby quickly opening the left and right side doors 602; when resetting, the two side doors 602 can first be made to contact the fourth spring 604 on the electrical cabinet 1 and squeeze the fourth spring 604. At this time, the push rod 614 can be released, and the tension spring 613 drives the push bar 610 to return to its position, thereby driving the rack 611 to reset, the installation shaft 606 rotates, and the stopper 607 blocks the side door 602 again.

[0053] A method for an electrical fire warning device for a low-power wide area network comprises the following steps:

[0054] S1: First, install the warning structure 2 inside the electrical cabinet 1, adjust the angle of the wire management structure 3, organize the warning structure 2 and the wires inside the electrical cabinet 1, and install the isolation structure 5 on the top of the electrical cabinet 1 through the installation structure 4;

[0055] S2: When an abnormal current occurs inside the electrical cabinet 1, the warning structure 2 can quickly cut off the power supply, which can promptly warn of electrical fires and alert nearby operators through the warning light 7 on the mounting structure 4;

[0056] S3: When the circuit inside the electrical cabinet 1 has overheated and caught fire, the explosion-proof blanket 502 is lowered around the electrical cabinet 1 to prevent the fire from spreading. When the operator arrives near the electrical cabinet 1 to prepare to extinguish the fire, if the fire inside is not large, the explosion-proof blanket 502 is raised, and the operator quickly opens the cabinet doors on both sides of the electrical cabinet 1 through the opening and closing structure 6, so as to facilitate the rapid fire extinguishing operation inside the electrical cabinet 1. If the fire inside is large, the fire can be extinguished directly in the electrical cabinet 1 surrounded by the isolation structure 5.

[0057] When the present invention is in use, the connecting foot 403 of the installation frame 404 is inserted into the slot 402 of the isolation frame 401, the rotating rod 409 drives the screw 405 to rotate, and the opposite threads at both ends of the screw 405 drive the slide bar 406 to slide along the guide rod 410, so that the block 407 is embedded in the slot 408 of the connecting foot 403, thereby completing the fixation of the installation frame 404, and the power supply of the motor 507 is turned on (the backup power supply 8 supplies power to the motor 507). The motor 507 drives the retracting roller 501 to rotate through the second pulley 508, the belt and the first pulley 506. The adjacent first gears 505 are engaged to ensure that the retracting rollers 501 on the four sides are synchronized. The explosion-proof blanket 502 rises and falls smoothly along the guide shaft 504, and the counterweight bar 503 ensures that the blanket surface is vertical, thereby completing the isolation of the electrical cabinet 1;

[0058] Secondly, fix the template 201 on the inner wall of the electrical cabinet 1, fix the mounting plate 202 to the template 201, and install the zero-sequence current transformer 203, the disconnector 204, the residual current electrical fire monitoring detector 205 and the controller 206 in sequence. Put the three-phase current transformer 209 on the T-shaped mounting rail 207 through the sliding sleeve 208, and slide it along the rail to adjust the position. When sliding the sliding sleeve 208, pull the connecting rod 215. After moving to the appropriate position, the first spring 214 provides a reset force to drive the limit rod 212 to make it snap into the limit hole 213 to fix the transformer position. The zero-sequence current transformer 203 is put on the outside of the three-phase cable to monitor the three-phase current vector sum for detecting ground faults. The three-phase current transformers 209 are respectively put on A On the three-phase conductors A, B, and C, the current of each phase is independently monitored for symmetrical fault detection such as overload and short circuit. The position of the three-phase current transformer 209 is easy to adjust, which facilitates the threading operation and makes the wiring more reasonable. The residual current type electrical fire monitoring detector 205 cooperates with the zero-sequence current transformer 203 to set the leakage threshold and warn of electrical fire hazards. The controller 206 receives the sensor data, analyzes and processes it, and then issues a control instruction. The zero-sequence current transformer 203, the three-phase current transformer 209, and the residual current type electrical fire monitoring detector 205 monitor the current situation in the electrical cabinet 1 in real time. When a current abnormality occurs, the controller 206 controls the isolation switch 204 to quickly cut off the power and triggers the warning light 7 to alert nearby operators.

[0059] When the wires in the electrical cabinet 1 need to be arranged, the pull ring 312 is pulled to drive the limit block 310 to slide, and the limit block 310 no longer engages with the limit slot 311. At the same time, the connecting shaft 313 slides and the third spring 314 is compressed. At this time, the rotating frame 302 can be rotated, and the rotating frame 302 rotates on the fixed shaft 301 and the connecting shaft 313. The rotating frame 302 is rotated to a suitable angle, the pull ring 312 is released, and the third spring 314 is reset, thereby driving the connecting shaft 313 to slide, and the connecting shaft 313 slides to make the limit block 310 insert into the limit slot 311 and be fixed. The distance between the upper wire clamp 305 and the lower wire clamp 303 is adjusted by the sliding rod 307, and the second spring 309 is used to clamp the cable to complete the line arrangement. The angle can be adjusted to adapt to different cable directions, reduce wire bending loss, extend service life, standardize line layout, and reduce the speed of fire spreading along the line.

[0060] Finally, in a normal state, the block 607 contacts the outer wall of the side door 602, restricting the side door 602 from opening. When extinguishing a fire, in order to avoid the front and rear cabinet doors from being overheated and causing trouble in unlocking, the fire extinguisher can choose to retract the isolation structure 5 according to actual conditions, and then press the push rod 614 at the rear of the electrical cabinet 1. The push rod 614 pushes the push bar 610 to slide along the slide rail 609, and the rack 611 drives the second gear 608 to rotate, thereby driving the installation shaft 606 to rotate. The rotation of the installation shaft 606 lifts the block 607, and the side door 602 automatically pops open under the action of the fourth spring 604, thereby quickly opening the left and right side doors 602; when resetting, the two side doors 602 can first contact the fourth spring 604 on the electrical cabinet 1, squeezing the fourth spring 604, and then the push rod 614 can be released, the tension spring 613 drives the push bar 610 to return to its position, thereby driving the rack 611 to reset, the installation shaft 606 rotates, and the block 607 blocks the side door 602 again.

[0061] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0062] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An electrical fire warning device for low-power wide area network, characterized in that: The invention comprises an electrical cabinet (1), an early warning structure (2) provided inside the electrical cabinet (1), a wiring structure (3) provided on the early warning structure (2), a mounting structure (4) provided on the top of the electrical cabinet (1), an isolation structure (5) mounted on the top of the electrical cabinet (1) through the mounting structure (4), an opening and closing structure (6) provided on the electrical cabinet (1), a warning light (7) and a backup power supply (8) provided on the mounting structure (4); The mounting structure (4) comprises an isolation frame (401), a slot (402), a connecting pin (403) and a mounting frame (404); the top of the electrical cabinet (1) is fixedly connected to the isolation frame (401); the isolation frame (401) is provided with four slots (402); the mounting frame (404) is provided with four connecting pins (403); the connecting pins (403) are plugged into the slots (402); The isolation structure (5) includes a retractable roller (501) and an explosion-proof blanket (502). The mounting frame (404) is rotatably connected to four retractable rollers (501). The four retractable rollers (501) are arranged in a rectangular array. The explosion-proof blanket (502) is wound around the retractable rollers (501). The bottom end of the explosion-proof blanket (502) is fixedly connected to a counterweight bar (503). The mounting frame (404) is fixedly connected to four guide shafts (504) for guiding the explosion-proof blanket (502). Each of the retractable rollers (501) is connected to a plurality of guide shafts (504) for guiding the explosion-proof blanket (502). 1), each of the two ends of the retractable roller (501) is fixedly connected to a first gear (505), the first gears (505) are all helical gears, and two adjacent first gears (505) are meshed with each other, one of the retractable rollers (501) is fixedly connected to a first pulley (506), the mounting frame (404) is fixedly connected to a motor (507), the output end of the motor (507) is fixedly connected to a second pulley (508), and the first pulley (506) and the second pulley (508) are driven by a belt.

2. The electrical fire warning device for low-power wide area network according to claim 1, characterized in that: The isolation frame (401) is rotatably connected to a screw rod (405), the two ends of the screw rod (405) having opposite thread directions, the screw rod (405) is symmetrically threaded with two slide bars (406), the slide bars (406) are slidably connected to the isolation frame (401), each of the slide bars (406) is fixedly connected to two clamping blocks (407), the connecting foot (403) is provided with a clamping groove (408), and the clamping block (407) is clamped with the clamping groove (408).

3. The electrical fire warning device for low-power wide area network according to claim 2, characterized in that: The end of the screw rod (405) is slidably connected to a rotating rod (409) with an "I"-shaped cross section, two guide rods (410) are fixedly connected to the isolation frame (401), the slide bar (406) is slidably connected to the guide rods (410), and a support plate (411) with a U-shaped cross section is fixedly connected to the installation frame (404), and a warning light (7) and a backup power supply (8) are installed on the support plate (411).

4. The electrical fire warning device for low power wide area network according to claim 1, characterized in that: The early warning structure (2) comprises a template (201) and a mounting plate (202); two templates (201) are fixedly connected inside the electrical cabinet (1); the two templates (201) are fixedly connected to the mounting plates (202); the mounting plates (202) are fixedly connected to a zero-sequence current transformer (203), an isolating switch (204), a residual current type electrical fire monitoring detector (205), a controller (206) and a mounting rail (207); the mounting rail (207) has a T-shaped cross section; three sliding sleeves (208) are slidably connected to the mounting rail (207); the sliding sleeves (208) are fixedly connected to three-phase A current transformer (209), wherein the mounting rail (207) is provided with three groups of linear array limiting holes (213), each of the three-phase current transformers (209) is fixedly connected to a first fixing block (210), a fixing sleeve (211) is fixedly connected to the first fixing block (210), a limiting rod (212) with a "cross" cross-section is slidably connected inside the fixing sleeve (211), the limiting rod (212) is engaged with the limiting hole (213), a first spring (214) is fixedly connected between the limiting rod (212) and the fixing sleeve (211), and a connecting rod (215) is rotatably connected to the limiting rod (212).

5. The electrical fire warning device for low power wide area network according to claim 4, characterized in that: The wire management structure (3) comprises a fixed shaft (301) and a rotating frame (302), wherein one of the mold plates (201) is fixedly connected to the fixed shaft (301), a rotating frame (302) having a U-shaped cross section is rotatably connected to the fixed shaft (301), a lower wire clamp (303) is fixedly connected to the rotating frame (302), two guide bars (304) are fixedly connected to the rotating frame (302), and upper wire clamps are slidably connected to the two guide bars (304). (305), four second fixed blocks (306) are fixedly connected to the upper wire clamp (305), four third fixed blocks (308) are fixedly connected to the lower wire clamp (303), a sliding rod (307) with a T-shaped cross section is fixedly connected to the second fixed block (306), the sliding rod (307) is slidably connected to the third fixed block (308), and a second spring (309) is fixedly connected between the sliding rod (307) and the third fixed block (308).

6. The electrical fire warning device for low power wide area network according to claim 5, characterized in that: The rotating frame (302) is provided with a limiting groove (311) with a regular hexagonal cross section, and the other template (201) is slidably connected to a connecting shaft (313) with a T-shaped cross section, and the connecting shaft (313) is fixedly connected to a limiting block (310) with a regular hexagonal cross section, and the limiting block (310) is plugged into the limiting groove (311), and a pull ring (312) is fixedly connected to the limiting block (310), and a third spring (314) is fixedly connected between the connecting shaft (313) and the template (201).

7. The electrical fire warning device for low power wide area network according to claim 6, characterized in that: A fixing rod (315) is fixedly connected to the template (201), and the connecting shaft (313) is slidably connected to the fixing rod (315).

8. The electrical fire warning device for low power wide area network according to claim 1, characterized in that: The opening and closing structure (6) comprises a rotating shaft (601) and a side door (602). The electrical cabinet (1) is fixedly connected to two rotating shafts (601), and the rotating shaft (601) is rotatably connected to the side door (602). Two mounting blocks (603) are fixedly connected to both sides of the electrical cabinet (1), and a fourth spring (604) is fixedly connected to the mounting block (603). The end of the fourth spring (604) contacts the inner wall of the side door (602). The top of the electrical cabinet (1) is fixedly connected to two fixing seats (605), and the fixing seat (605) is rotatably connected to the mounting shaft (606). The two ends of the mounting shaft (606) are fixedly connected to a stopper (607), and the stopper (607) contacts the outer wall of the side door (602).

9. The electrical fire warning device for low power wide area network according to claim 8, characterized in that: A second gear (608) is fixedly connected to the mounting shaft (606), two slide rails (609) are fixedly connected to the electrical cabinet (1), a push bar (610) with a T-shaped cross section is slidably connected between the two slide rails (609), a rack (611) is fixedly connected to the push bar (610), and the rack (611) is engaged with the second gear (608), a fixed plate (612) is fixedly connected to the electrical cabinet (1), a push rod (614) with a T-shaped cross section is fixedly connected to the push bar (610), the push rod (614) is slidably connected to the fixed plate (612), and a tension spring (613) is fixedly connected between the fixed plate (612) and the push bar (610).

10. The method of the electrical fire early warning device for low power wide area network according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: First, install the warning structure (2) inside the electrical cabinet (1), adjust the angle of the wire management structure (3), organize the wires inside the warning structure (2) and the electrical cabinet (1), and install the isolation structure (5) on the top of the electrical cabinet (1) through the installation structure (4); S2: When an abnormal current occurs inside the electrical cabinet (1), the early warning structure (2) can quickly cut off the power supply, thereby providing a timely early warning of an electrical fire, and at the same time alerting nearby operators through the warning light (7) on the mounting structure (4); S3: When the circuit inside the electrical cabinet (1) has overheated and caught fire, the explosion-proof blanket (502) is lowered around the electrical cabinet (1) to prevent the fire from spreading. When the operator arrives near the electrical cabinet (1) and prepares to extinguish the fire, if the fire inside is not large, the explosion-proof blanket (502) is raised, and the operator quickly opens the cabinet doors on both sides of the electrical cabinet (1) through the opening and closing structure (6), so as to facilitate the rapid fire extinguishing operation inside the electrical cabinet (1). If the fire inside is large, the fire can be extinguished directly in the electrical cabinet (1) surrounded by the isolation structure (5).

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