Overload protection power distribution cabinet and bus load distribution method

Abstract

The invention discloses an overload protection power distribution cabinet and a bus load distribution method, and relates to the technical field of power electronic components, the overload protection power distribution cabinet comprises a power distribution cabinet body, the inner wall of the power distribution cabinet body is fixedly connected with a layered plate, and the side wall of the top end of the layered plate and the side wall of the top end of the power distribution cabinet body are both provided with a plurality of corresponding wire inlet holes. When the surface temperature of multiple strands of wires in the power distribution cabinet body is regularly detected, external wires are automatically separated through the adsorption shell and the clamping ring structure, internal wires are effectively exposed, then the temperature sensor automatically detects the surface temperature of the corresponding wires, whether overload is about to occur or not is judged according to a temperature measurement result, and once a risk is recognized, the power distribution cabinet is timely started. The load current of the bus where the electric wire is located is automatically redistributed, the current of the line is reduced, overload is prevented, the position of the electric wire does not need to be manually adjusted, and the temperature detection efficiency and the coverage integrity are effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of power electronic components technology, and particularly relates to an overload protection distribution cabinet and a bus load distribution method. Background Technology

[0002] Distribution cabinets are key equipment for power distribution and management. One of their core protection functions is overload protection. The development of overload protection technology has gone through the fuse protection stage and the thermal-magnetic circuit breaker protection stage.

[0003] Existing overload protection distribution cabinets generally adopt a passive response mode of "fault occurrence → detection → tripping," which makes it difficult to effectively intervene before a fault occurs, inevitably leading to production interruptions. To achieve early prevention, staff usually need to periodically check the surface temperature of multiple wires inside the distribution cabinet. Once the surface temperature of a wire exceeds the normal range, it can be determined that it may be about to be overloaded, and then the load current of the busbar containing that wire can be redistributed to reduce the current in that line and avoid overload. However, in actual operation, each wire is often composed of multiple parallel conductors, and the external conductors often block the internal conductors. The wires in the distribution cabinet are usually in a fixed installation state, making it difficult for staff to adjust the position of the external conductors to check the surface temperature of the internal conductors. This significantly reduces the reliability of overload detection. In addition, relying on manual temperature measurement at regular intervals is inefficient, not only increasing the maintenance burden but also seriously affecting the overall reliability and safety of the distribution cabinet's overload protection of the wires.

[0004] To address these issues, we propose an overload protection distribution cabinet and busbar load distribution method. Summary of the Invention

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An overload protection distribution cabinet includes a cabinet body. A layered plate is fixedly connected to the inner wall of the cabinet body. Multiple corresponding wire inlet holes are provided on the top sidewall of the layered plate and the top sidewall of the cabinet body. A fixing component for fixing and limiting multiple wires above the layered plate is fixedly connected to the top inner wall of the cabinet body. A detection component for detecting the surface temperature of the wires to determine the overload condition of the wires is also fixedly connected to the top inner wall of the cabinet body. A pull-wire component is provided inside the detection component for pulling apart multiple wires located outside each wire to expose the wires inside each wire for easy detection of overload conditions. Multiple current transformers are fixedly connected to the bottom sidewall of the layered plate, and each current transformer is located below a corresponding wire inlet hole.

[0007] Preferably, the fixing assembly includes multiple fixing rings fixedly connected to the inner wall of the top of the distribution cabinet body and the side wall of the top of the layered plate. The multiple fixing rings are all located outside the corresponding inlet holes. The inner walls of the fixing rings are symmetrically fixedly connected to two first electric telescopic rods. The telescopic ends of the first electric telescopic rods are all fixedly connected to a first clamping ring. The inner wall of one end of the distribution cabinet body is fixedly connected to multiple second electric telescopic rods. The telescopic ends of the second electric telescopic rods are all fixedly connected to a limiting circular plate. The multiple limiting circular plates are all located below the multiple inlet holes opened on the inner wall of the top of the corresponding distribution cabinet body.

[0008] Preferably, the detection component includes multiple sets of third electric telescopic rods fixedly connected to the inner wall of the top of the power distribution cabinet body. Each set of third electric telescopic rods has two rods, which are located on both sides of multiple inlet holes opened on the inner wall of the top of the corresponding power distribution cabinet body. The telescopic end of each set of third electric telescopic rods is fixedly connected to the same mounting ring, and the inner wall of the mounting ring is provided with a first groove.

[0009] Preferably, the inner wall of the first groove is fixedly connected to a first electric slide rail, the inner wall of the first electric slide rail is slidably connected to a plurality of first slide plates, the side wall of the first slide plates is fixedly connected to a fourth electric telescopic rod, the telescopic end of the fourth electric telescopic rod is fixedly connected to a connecting plate, the side wall of the connecting plate is fixedly connected to a temperature sensor, the outer wall of the temperature sensor is fixedly connected to a heat-conducting rod, and one end of the heat-conducting rod is located on the same plane as the detection end of the corresponding temperature sensor.

[0010] Preferably, each of the connecting plates has a detection shell fixedly connected to its sidewall, and the other end of each heat-conducting rod extends inward through the corresponding sidewall of the detection shell. The bottom inner wall of the detection shell has a first sliding groove, and a first slider is slidably connected inside the first sliding groove. Each of the top sidewalls of the first slider has a movable plate fixedly connected to its top. The outer wall of the movable plate abuts against the inner wall of the detection shell. The movable plate contains a magnet inside, and mercury is provided on one side of the movable plate inside the detection shell.

[0011] Preferably, a detection frame is fixedly connected to the top sidewall of the detection shell, a second sliding groove is formed on the inner wall of one end of the detection frame, a second slider is slidably connected inside the second sliding groove, a conductive plate is fixedly connected to the sidewall of the second slider, and a magnet is also provided inside the conductive plate. A resistance plate is fixedly connected to the inner wall of the other end of the detection frame, the variable resistance surface of the resistance plate abuts against the sidewall of the corresponding conductive plate, and the conductive plate and the resistance plate are electrically connected. Cooling plates are fixedly connected to the inner walls of both ends of the distribution cabinet body, the cooling plates are located above the layered plates, and the cooling plates are electrically connected to multiple resistance plates.

[0012] Preferably, the pull wire assembly includes a second groove opened in the inner wall of the mounting ring, a second electric slide rail fixedly connected to the inner wall of the second groove, a plurality of second slide plates slidably connected to the inner wall of the second electric slide rail, a fifth electric telescopic rod fixedly connected to the side wall of each of the second slide plates, an adsorption shell fixedly connected to the telescopic end of the fifth electric telescopic rod, and an air pump fixedly connected to the top side wall of the adsorption shell.

[0013] Preferably, the air inlet of the air pump extends inward through the side wall of the adsorption shell, the side wall of the adsorption shell has multiple adsorption holes, the outer wall of the fifth electric telescopic rod is fixedly connected to a support plate, the side wall of the support plate is fixedly connected to a sixth electric telescopic rod, and the telescopic end of the sixth electric telescopic rod is fixedly connected to a clamping plate.

[0014] Preferably, two seventh electric telescopic rods are symmetrically fixedly connected to the inner walls of both ends of the card plate. The telescopic ends of the seventh electric telescopic rods are fixedly connected to retaining rings, and multiple rollers are rotatably connected to the side walls of the two retaining rings at opposite ends.

[0015] A bus load distribution method includes the following steps:

[0016] S1: Control the second electric telescopic rod to start, push the limiting plate to move each wire to the side of the inlet hole, so that the wire is bent above the layer plate. Then, control the first electric telescopic rod to start, drive the first clamping ring to fix the two ends of the multiple wires above the layer plate, and complete the installation and positioning of the wires. When the distribution cabinet is running normally, use each current transformer to detect the current of the connected wires in real time. When the current of a certain circuit reaches the preset overload threshold, immediately control the circuit to disconnect the circuit and execute the basic overload protection.

[0017] S2: During periodic testing, multiple sets of third electric telescopic rods are activated, moving the mounting ring to the outside of each wire. Then, the second electric slide rail is activated, driving the second sliding plate, the fifth electric telescopic rod, and the adsorption shell to the predetermined position. The fifth electric telescopic rod extends, bringing the adsorption hole into contact with the outer wall of the wire. The air pump is then activated, using negative pressure to firmly adsorb the adsorption shell onto each wire. Next, the second electric telescopic rod retracts, causing the limiting plate to retract, loosening each wire. At this point, the fifth electric telescopic rod retracts, pulling the adsorbed outer wire outwards to make room for the inner wire. Finally, the sixth and seventh... The electric telescopic rod drives the clamping plate and the clamping ring to work together to clamp and fix the wire, thereby effectively exposing the individual wires inside each wire. The first electric slide rail is activated, which moves the first slide plate, the fourth electric telescopic rod, and the temperature sensor to the exposed wire side. The fourth electric telescopic rod is then extended, so that the detection end of the temperature sensor contacts the outer wall of the wire to measure the temperature. By moving the clamping ring downward, continuous multi-point temperature measurement can be performed on different sections of the wire to ensure the comprehensiveness of the data. When the temperature of multiple wires in a certain wire is found to be consistently high, it is determined that the busbar of that wire is overloaded and there is a risk of overload.

[0018] S3: Once S2 determines that a busbar is overloaded, the system immediately generates a load allocation command through the PLC controller to automatically and smoothly transfer some of the non-critical load on that busbar to other buses with lower loads, thereby reducing the current load on high-risk buses and preventing overload from the source. During temperature detection, the heat from the wires is conducted to the mercury inside the detection housing through the heat-conducting rod. The mercury expands and pushes the moving plate and conductive plate, thereby changing the resistance value of the resistance plate. The change in resistance value is collected and calculated in real time by the PLC controller, which dynamically adjusts the cooling intensity of the cooling plate to achieve efficient and precise cooling of the wires. After the detection is completed, the control adsorption shell re-adsorbs the wires and pushes them together in the middle. Then, the control second electric telescopic rod is activated to reset the limit plate, restricting each wire to a taut state again. Finally, all actuators (such as the adsorption shell, retaining ring, etc.) return to their initial positions, and the multiple wires return to their original state before the detection, waiting for the next detection cycle.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] By incorporating fixed, detection, and pull-wire components, the system can automatically separate external wires through an adsorption shell and retaining ring structure when periodically monitoring the surface temperature of multiple wires within the distribution cabinet. This effectively exposes the internal wires, allowing temperature sensors to automatically detect their surface temperatures. Based on the temperature readings, the system determines if an overload is imminent. If a risk is detected, the system automatically redistributes the load current of the busbar containing that wire, reducing the current in that line and preventing overload. This eliminates the need for manual wire adjustments, significantly improving the efficiency and coverage of temperature detection. Furthermore, the system can automatically adjust the resistance value of the corresponding resistance plate based on the wire surface temperature, thereby controlling the cooling intensity of the cooling plate and effectively cooling the wires. This prevents safety hazards caused by overheating and greatly enhances the overall reliability and safety of the distribution cabinet's overload protection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a partial structural diagram of the present invention. Figure 1 ;

[0023] Figure 3 This is a partial structural diagram of the present invention. Figure 2 ;

[0024] Figure 4 This is a partial structural diagram of the present invention. Figure 3 ;

[0025] Figure 5 This is a partial structural diagram of the present invention. Figure 4 ;

[0026] Figure 6 For the present invention Figure 5 Enlarged view of part A;

[0027] Figure 7 This is a partial structural diagram of the present invention. Figure 5 ;

[0028] Figure 8 This is a cross-sectional view of part of the structure of the present invention.

[0029] In the diagram: 1. Distribution cabinet body; 2. Layered plate; 3. Cable inlet; 4. Fixing assembly; 41. Fixing ring; 42. First electric telescopic rod; 43. First clamping ring; 44. Second electric telescopic rod; 45. Limiting circular plate; 5. Detection assembly; 51. Third electric telescopic rod; 52. Mounting ring; 53. First groove; 54. First electric slide rail; 55. First sliding plate; 56. Fourth electric telescopic rod; 57. Connecting plate; 58. Temperature sensor; 59. Heat-conducting rod; 510. Detection shell; 511. First slide groove; 512. First... 513. Slider; 514. Moving plate; 515. Detection frame; 516. Second slide groove; 517. Second slider; 518. Conductive plate; 519. Resistance plate; 6. Cooling plate; 6. Pull wire assembly; 61. Second groove; 62. Second electric slide rail; 63. Second slide plate; 64. Fifth electric telescopic rod; 65. Adsorption shell; 66. Air pump; 67. Adsorption hole; 68. Support plate; 69. Sixth electric telescopic rod; 610. Clamping plate; 611. Seventh electric telescopic rod; 612. Clamping ring; 613. Roller; 7. Current transformer. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] The following electrical components are all electrically connected to the external PLC controller.

[0032] Reference Figures 1-8 An overload protection distribution cabinet includes a distribution cabinet body 1. A layered plate 2 is fixedly connected to the inner wall of the distribution cabinet body 1. The top side wall of the layered plate 2 and the top side wall of the distribution cabinet body 1 are provided with multiple corresponding inlet holes 3. A fixing component 4 for fixing and limiting multiple wires above the layered plate 2 is fixedly connected to the top inner wall of the distribution cabinet body 1. A detection component 5 for detecting the surface temperature of the wires to determine the overload condition of the wires is fixedly connected to the top inner wall of the distribution cabinet body 1. A pull-wire component 6 is provided inside the detection component 5 for pulling apart multiple wires located outside each wire to expose the wires inside each wire to facilitate the detection of the overload condition of the internal wires. Multiple current transformers 7 are fixedly connected to the bottom side wall of the layered plate 2. The current transformers 7 are all located below the corresponding inlet holes 3.

[0033] In this embodiment, the fixing component 4 includes multiple fixing rings 41 that are fixedly connected to the inner wall of the top of the power distribution cabinet body 1 and the side wall of the top of the layered plate 2. The multiple fixing rings 41 are all located outside the corresponding inlet holes 3. The inner wall of each fixing ring 41 is symmetrically fixedly connected to two first electric telescopic rods 42. The telescopic ends of each first electric telescopic rod 42 are fixedly connected to a first clamping ring 43. The inner wall of one end of the power distribution cabinet body 1 is fixedly connected to multiple second electric telescopic rods 44. The telescopic ends of each second electric telescopic rod 44 are fixedly connected to a limiting circular plate 45. The multiple limiting circular plates 45 are all located below the multiple inlet holes 3 opened on the inner wall of the top of the corresponding power distribution cabinet body 1.

[0034] The detection component 5 includes multiple sets of third electric telescopic rods 51 fixedly connected to the inner wall of the top of the power distribution cabinet body 1. Each set of third electric telescopic rods 51 has two rods, and they are located on both sides of multiple inlet holes 3 opened on the inner wall of the top of the corresponding power distribution cabinet body 1. The telescopic end of each set of third electric telescopic rods 51 is fixedly connected to the same mounting ring 52, and the inner wall of the mounting ring 52 is provided with a first groove 53.

[0035] The inner wall of the first groove 53 is fixedly connected to the first electric slide rail 54. The inner wall of the first electric slide rail 54 is slidably connected to the first slide plate 55. The side wall of the first slide plate 55 is fixedly connected to the fourth electric telescopic rod 56. The telescopic end of the fourth electric telescopic rod 56 is fixedly connected to the connecting plate 57. The side wall of the connecting plate 57 is fixedly connected to the temperature sensor 58. The outer wall of the temperature sensor 58 is fixedly connected to the heat-conducting rod 59. One end of the heat-conducting rod 59 is located on the same plane as the detection end of the corresponding temperature sensor 58.

[0036] The side walls of the connecting plate 57 are all fixedly connected to the detection shell 510. The other end of the heat-conducting rod 59 extends inward through the side wall of the corresponding detection shell 510. The bottom inner wall of the detection shell 510 is provided with a first sliding groove 511. The first sliding groove 511 is slidably connected to the first slider 512. The top side wall of the first slider 512 is fixedly connected to a moving plate 513. The outer wall of the moving plate 513 abuts against the inner wall of the detection shell 510. The moving plate 513 contains a magnet. Mercury is provided on one side of the moving plate 513 inside the detection shell 510.

[0037] A detection frame 514 is fixedly connected to the top side wall of the detection housing 510. A second sliding groove 515 is opened on the inner wall of one end of the detection frame 514. A second slider 516 is slidably connected inside the second sliding groove 515. A conductive plate 517 is fixedly connected to the side wall of the second slider 516. A magnet is also provided inside the conductive plate 517. A resistance plate 518 is fixedly connected to the inner wall of the other end of the detection frame 514. The variable resistance surface of the resistance plate 518 abuts against the side wall of the corresponding conductive plate 517. The conductive plate 517 and the resistance plate 518 are electrically connected. Cooling plates 519 are fixedly connected to the inner walls of both ends of the distribution cabinet body 1. The cooling plates 519 are located above the layered plate 2. The cooling plates 519 are electrically connected to multiple resistance plates 518.

[0038] The pull-wire assembly 6 includes a second groove 61 opened in the inner wall of the mounting ring 52. A second electric slide rail 62 is fixedly connected to the inner wall of the second groove 61. A plurality of second slide plates 63 are slidably connected to the inner wall of the second electric slide rail 62. A fifth electric telescopic rod 64 is fixedly connected to the side wall of each of the second slide plates 63. An adsorption shell 65 is fixedly connected to the telescopic end of the fifth electric telescopic rod 64. An air pump 66 is fixedly connected to the top side wall of the adsorption shell 65.

[0039] The air pump 66 has an air inlet that extends inward through the side wall of the adsorption shell 65. The side wall of the adsorption shell 65 has multiple adsorption holes 67. The outer wall of the fifth electric telescopic rod 64 is fixedly connected to a support plate 68. The side wall of the support plate 68 is fixedly connected to a sixth electric telescopic rod 69. The telescopic end of the sixth electric telescopic rod 69 is fixedly connected to a clamping plate 610.

[0040] Two seventh electric telescopic rods 611 are symmetrically fixedly connected to the inner walls of both ends of the plate 610. The telescopic ends of the seventh electric telescopic rods 611 are fixedly connected to retaining rings 612. Multiple rollers 613 are rotatably connected to the side walls of the two retaining rings 612 at opposite ends.

[0041] Specifically, when periodically detecting the surface temperature of multiple wires inside the distribution cabinet body 1, the external wires are automatically separated by the adsorption shell 65 and the retaining ring 612 structure, effectively exposing the internal wires. Subsequently, the temperature sensor 58 automatically detects the surface temperature of the corresponding wire and determines whether an overload is imminent based on the temperature measurement results. Once a risk is identified, the load current of the busbar containing the wire is automatically redistributed to reduce the current in that line, thereby preventing overload. There is no need for manual adjustment of the wire position, which effectively improves the efficiency and coverage of temperature detection. It can also automatically adjust the resistance value of the corresponding resistor plate 518 according to the surface temperature of the wire, thereby controlling the cooling intensity of the cooling plate 519 to achieve effective cooling of the wires and avoid safety hazards caused by overheating. This greatly improves the overall reliability and safety of the distribution cabinet body 1 in protecting the wires from overload.

[0042] A bus load distribution method includes the following steps:

[0043] S1: Control the second electric telescopic rod 44 to start, push the limiting circular plate 45 to push each wire to the side of the inlet hole 3, so that the wire is bent above the layer plate 2. Then, control the first electric telescopic rod 42 to start, drive the first clamping ring 43 to fix the two ends of the multiple wires above the layer plate 2, and complete the installation and positioning of the wires. When the power distribution cabinet body 1 is running normally, the current transformers 7 are used to detect the current of the connected wires in real time. When the current of a certain circuit reaches the preset overload threshold, the circuit of that circuit is immediately disconnected to perform basic overload protection.

[0044] S2: During the periodic inspection, multiple sets of third electric telescopic rods 51 are activated, moving the mounting ring 52 to the outside of each wire. Then, the second electric slide rail 62 is activated, driving the second sliding plate 63, the fifth electric telescopic rod 64, and the adsorption shell 65 to a predetermined position. The fifth electric telescopic rod 64 is extended, making the adsorption hole 67 contact the outer wall of the wire. Then, the air pump 66 is activated, using negative pressure to firmly adsorb the adsorption shell 65 onto a single wire. Next, the second electric telescopic rod 44 is retracted, causing the limiting circular plate 45 to retract, loosening each wire. At this point, the fifth electric telescopic rod 64 is retracted, pulling the adsorbed outer wire outward to make room for the inner wire. Finally, the sixth and... The electric telescopic rod 611 drives the clamping plate 610 and the clamping ring 612 to work together to clamp and fix the wire, thereby effectively exposing the individual wires inside each wire. It controls the first electric slide rail 54 to start, driving the first slide plate 55, the fourth electric telescopic rod 56 and the temperature sensor 58 to move to the exposed wire side. It controls the fourth electric telescopic rod 56 to extend, so that the detection end of the temperature sensor 58 contacts the outer wall of the wire to measure the temperature. By moving the clamping ring 612 downward, it can continuously measure the temperature of different sections of the wire at multiple points to ensure the comprehensiveness of the data. When it is detected that the temperature of multiple wires in a certain wire is continuously high, it is determined that the busbar where the wire is located is overloaded and there is an overload risk.

[0045] S3: Once S2 determines that a busbar is overloaded, the system immediately generates a load allocation command through the PLC controller to automatically and smoothly transfer some of the non-critical load on that busbar to other buses with lower loads, thereby reducing the current load on high-risk buses and preventing overload from the source. During temperature detection, the heat of the wire is conducted to the mercury in the detection shell 510 through the heat conduction rod 59. The mercury expands and pushes the moving plate 513 and the conductive plate 517, thereby changing the resistance value of the resistance plate 518. The change in resistance value is collected and calculated in real time by the PLC controller, and the cooling intensity of the cooling plate 519 is dynamically adjusted accordingly to achieve efficient and precise cooling of the wire. After the detection is completed, the adsorption shell 65 is controlled to re-adsorb the wire and push the wire to gather in the middle. Then, the second electric telescopic rod 44 is activated to reset the limit plate 45, which restricts each wire to a taut state again. Finally, all actuators (such as the adsorption shell 65, the retaining ring 612, etc.) return to their initial positions, and the multiple wires return to their original state before the detection, waiting for the next detection cycle.

[0046] The operating principle of the present invention is now described as follows:

[0047] In this invention, when the distribution cabinet body 1 is in use, the area below the layered plate 2 inside the distribution cabinet body 1 is the installation position for electrical components, and the area above the layered plate 2 is the passage position for wires. Multiple wires are connected to the corresponding current transformers 7 through the inlet holes 3 opened on the top side wall of the distribution cabinet body 1 and the inlet holes 3 opened on the surface of the layered plate 2. Then, the current transformers 7 are connected to the electrical components below the layered plate 2 to complete the installation of multiple wires. After that, the second electric telescopic rod 44 is activated, which drives the corresponding second electric telescopic rod 44 to activate, causing the limiting circular plate 45 to move towards the corresponding wire, pushing each wire to the side above the inlet hole 3. At this time, the wire is in a bent state above the layered plate 2. Then, the operator fixes the wires outside the distribution cabinet body 1. Then, the first electric telescopic rod 42 is activated, driving the corresponding first clamping ring 43 to move. The first clamping ring 43 is used to fix the two ends of the multiple wires above the layered plate 2, thus completing the installation of the wires. During normal use of the distribution cabinet body 1, the current of the wires is detected by the current transformer 7. When the detected current is the same as the current when an overload occurs, it indicates that the wire connected to the current transformer 7 is overloaded. The circuit of this wire is disconnected to avoid safety hazards caused by wire overload. In addition, during the daily use of the distribution cabinet body 1, multiple sets of third electric telescopic rods 51 are activated, driving the mounting ring 52 to move to the outside of each wire. Then, the second electric slide rail 62 is activated, driving the corresponding second slide plate. Movement 63: During the movement of the second sliding plate 63, the fifth electric telescopic rod 64 and the adsorption shell 65 will move accordingly. After the multiple adsorption shells 65 are located on one side of the single wire outside each wire, the second electric slide rail 62 is closed. Then, the fifth electric telescopic rod 64 is activated, moving the adsorption shell 65 towards the outside of the corresponding wire. After the adsorption hole 67 contacts the outer wall of the corresponding wire, the fifth electric telescopic rod 64 is closed. Then, the air pump 66 is activated, continuously extracting air from the adsorption shell 65. At this time, the adsorption hole 67 will continuously draw external air into the adsorption shell 65, thereby generating suction, causing the adsorption shell 65 to adhere to the outer wall of the corresponding wire. Then, the second electric telescopic rod 44 is retracted, moving the limiting circular plate 45. Plate 45 does not support the corresponding single wire. At this time, each wire above the layered plate 2 will be relatively loose. Since the adsorption shell 65 adsorbs the corresponding wire, the single wire on the outside of each wire will not spread out. Then, control the fifth electric telescopic rod 64 to retract, driving the wire adsorbed by the adsorption shell 65 to move towards the inner wall of the mounting ring 52, thereby pulling the single wire on the outside of each wire outward a certain distance. Then, control the sixth electric telescopic rod 69 to start, driving the clamping plate 610 to move towards the corresponding wire. After the inner walls of both ends of the clamping plate 610 are on both sides of the corresponding wire, control the sixth electric telescopic rod 69 to close. Then, control the seventh electric telescopic rod 611 to start, driving the clamping ring 612 to move, using the clamping ring 612 to clamp the outer wall of the wire.Then, the adsorption shell 65 is restored to its original position, followed by the retraction of the sixth electric telescopic rod 69, exposing the individual wires inside each wire. Next, the first electric slide rail 54 is activated, moving multiple first sliding plates 55. During the movement of the first sliding plates 55, the fourth electric telescopic rod 56 and the temperature sensor 58 move accordingly. After the temperature sensor 58 moves to the side of the corresponding wire, the first electric slide rail 54 is closed. Then, the fourth electric telescopic rod 56 is activated, moving the temperature sensor 58 in the opposite direction to the corresponding wire. After the detection end of the temperature sensor 58 contacts the outer wall of the corresponding wire, the fourth electric telescopic rod 56 is closed. The temperature sensor 58 is used to detect the temperature of the outer wall of the wire, and a judgment is made based on the temperature of the outer wall of the wire. When the temperature of multiple wires in a given wire is high, it indicates that the busbar containing this wire is under heavy load. The current carrying this busbar is then diverted to other busbars to reduce its load and prevent overload, which could lead to power outages and disrupt the normal operation of the equipment. During the temperature sensor 58's detection of the corresponding wire's external temperature, the heat-conducting rod 59 comes into contact with the wire's exterior. Heat from the wire's outer wall is continuously conducted to the heat-conducting rod 59, which then transfers the heat to the mercury inside the detection housing 510. The mercury expands due to the heat, pushing the moving plate 513 towards the other end of the detection housing 510 under the limit of the first slider 512. Since the moving plate 513 contains a magnet, as it moves... The movement of plate 513 causes conductive plate 517, which also contains magnets, to move to one side under the limit of the second slider 516. During the movement of conductive plate 517, the resistance value of resistor plate 518 is continuously changed. The greater the moving distance of conductive plate 517, the smaller the resistance value of resistor plate 518, and the greater the current. This indicates that the temperature outside the wire is higher. Since the current of multiple resistance values ​​changes according to the temperature outside the corresponding wire, the external PLC controller performs comprehensive calculations on the current data of multiple resistance values, and then controls the cooling plate 519 to adjust the cooling temperature of the wire, achieving limited heat dissipation of the wire and preventing overheating and potential danger. After detecting this part of the wire, the third electric extension is then controlled. The retraction rod 51 is activated, causing the retaining ring 612 to move downwards. Since the retaining ring 612 secures the wire, the roller 613 reduces friction between the retaining ring 612 and the wire during its downward movement, ensuring stable downward clamping. After the retaining ring 612 has moved downwards a certain distance, the external temperature of the wire is monitored again, checking for temperature inconsistencies at different locations to accurately determine the wire's load. After monitoring the external temperature, the suction shell 65 re-adheres the corresponding wire surface. Then, the retaining ring 612 is restored to its original position, and the fifth electric telescopic rod 64 is activated, using the suction shell 65 to push the wire towards the center position.The system reassembles each wire, then activates the second electric telescopic rod 44, using the limiting circular plate 45 to restrict the corresponding wire, keeping each wire relatively taut above the layered plate 2. The remaining wires are then restored to their pre-detection state. Finally, the suction shell 65 returns to its original position. During periodic temperature checks of the wire surfaces within the distribution cabinet 1, the suction shell 65 and retaining ring 612 automatically separate external wires, effectively exposing internal wires. The temperature sensor 58 then automatically detects the surface temperature of the corresponding wire, determining whether an overload is imminent. If a risk is detected, the system automatically redistributes the load current of the busbar containing that wire, reducing the current in that line and preventing overload. No manual adjustment of the wire position is required, effectively improving the efficiency and coverage of temperature detection. Furthermore, the system automatically adjusts the resistance value of the corresponding resistor plate 518 based on the wire surface temperature, thereby controlling the cooling intensity of the cooling plate 519 to effectively cool the wires and prevent safety hazards caused by overheating. This significantly improves the overall reliability and safety of the distribution cabinet 1 for wire overload protection.

[0048] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An overload protection distribution cabinet, comprising a distribution cabinet body (1), characterized in that, The inner wall of the power distribution cabinet body (1) is fixedly connected to a layered plate (2). The top side wall of the layered plate (2) and the top side wall of the power distribution cabinet body (1) are provided with multiple corresponding inlet holes (3). The top inner wall of the power distribution cabinet body (1) is fixedly connected to a fixing component (4) for fixing and limiting multiple wires above the layered plate (2). The top inner wall of the power distribution cabinet body (1) is fixedly connected to a detection component (5) for detecting the surface temperature of the wires to determine the overload condition of the wires. The detection component (5) is provided with a pull-wire component (6) for pulling multiple wires located outside each wire to expose the wires inside each wire to facilitate the detection of the overload condition of the internal wires. The bottom side wall of the layered plate (2) is fixedly connected to multiple current transformers (7). The current transformers (7) are all located below the corresponding inlet holes (3).

2. The overload protection distribution cabinet according to claim 1, characterized in that, The fixing component (4) includes multiple fixing rings (41) that are fixedly connected to the inner wall of the top of the power distribution cabinet body (1) and the side wall of the top of the layered plate (2). The multiple fixing rings (41) are all located outside the corresponding inlet holes (3). The inner walls of the fixing rings (41) are symmetrically fixedly connected to two first electric telescopic rods (42). The telescopic ends of the first electric telescopic rods (42) are all fixedly connected to a first clamping ring (43). The inner wall of one end of the power distribution cabinet body (1) is fixedly connected to multiple second electric telescopic rods (44). The telescopic ends of the second electric telescopic rods (44) are all fixedly connected to a limiting circular plate (45). The multiple limiting circular plates (45) are all located below the multiple inlet holes (3) opened on the inner wall of the top of the corresponding power distribution cabinet body (1).

3. The overload protection distribution cabinet according to claim 1, characterized in that, The detection component (5) includes multiple sets of third electric telescopic rods (51) fixedly connected to the inner wall of the top of the power distribution cabinet body (1). Each set of the third electric telescopic rods (51) has two rods, and they are located on both sides of the multiple inlet holes (3) opened on the inner wall of the top of the corresponding power distribution cabinet body (1). The telescopic end of each set of the third electric telescopic rods (51) is fixedly connected to the same mounting ring (52). The inner wall of the mounting ring (52) is provided with a first groove (53).

4. The overload protection distribution cabinet according to claim 3, characterized in that, The inner wall of the first groove (53) is fixedly connected to a first electric slide rail (54), the inner wall of the first electric slide rail (54) is slidably connected to a plurality of first slide plates (55), the side wall of the first slide plates (55) is fixedly connected to a fourth electric telescopic rod (56), the telescopic end of the fourth electric telescopic rod (56) is fixedly connected to a connecting plate (57), the side wall of the connecting plate (57) is fixedly connected to a temperature sensor (58), the outer wall of the temperature sensor (58) is fixedly connected to a heat-conducting rod (59), and one end of the heat-conducting rod (59) is located on the same plane as the detection end of the corresponding temperature sensor (58).

5. The overload protection distribution cabinet according to claim 4, characterized in that, The sidewalls of the connecting plate (57) are all fixedly connected to the detection shell (510). The other end of the heat-conducting rod (59) extends inward through the sidewall of the corresponding detection shell (510). The bottom inner wall of the detection shell (510) is provided with a first sliding groove (511). The first sliding groove (511) is slidably connected to a first slider (512). The top sidewall of the first slider (512) is fixedly connected to a moving plate (513). The outer wall of the moving plate (513) abuts against the inner wall of the detection shell (510). The moving plate (513) contains a magnet. Mercury is provided on one side of the moving plate (513) inside the detection shell (510).

6. The overload protection distribution cabinet according to claim 5, characterized in that, A detection frame (514) is fixedly connected to the top side wall of the detection shell (510). A second sliding groove (515) is provided on the inner wall of one end of the detection frame (514). A second slider (516) is slidably connected inside the second sliding groove (515). A conductive plate (517) is fixedly connected to the side wall of the second slider (516). A magnet is also provided inside the conductive plate (517). A resistance plate (518) is fixedly connected to the inner wall of the other end of the detection frame (514). The variable resistance surface of the resistance plate (518) abuts against the side wall of the corresponding conductive plate (517). The conductive plate (517) and the resistance plate (518) are electrically connected. Cooling plates (519) are fixedly connected to the inner walls of both ends of the power distribution cabinet body (1). The cooling plates (519) are located above the layered plate (2). The cooling plates (519) are all electrically connected to multiple resistance plates (518).

7. The overload protection distribution cabinet according to claim 1, characterized in that, The pull wire assembly (6) includes a second groove (61) opened in the inner wall of the mounting ring (52). A second electric slide rail (62) is fixedly connected to the inner wall of the second groove (61). A plurality of second slide plates (63) are slidably connected to the inner wall of the second electric slide rail (62). A fifth electric telescopic rod (64) is fixedly connected to the side wall of each of the second slide plates (63). An adsorption shell (65) is fixedly connected to the telescopic end of the fifth electric telescopic rod (64). An air pump (66) is fixedly connected to the top side wall of the adsorption shell (65).

8. The overload protection distribution cabinet according to claim 7, characterized in that, The air pump (66) has its air inlet end extending inward through the side wall of the adsorption shell (65). The side wall of the adsorption shell (65) has multiple adsorption holes (67). The outer wall of the fifth electric telescopic rod (64) is fixedly connected to a support plate (68). The side wall of the support plate (68) is fixedly connected to a sixth electric telescopic rod (69). The telescopic end of the sixth electric telescopic rod (69) is fixedly connected to a clamping plate (610).

9. The overload protection distribution cabinet according to claim 8, characterized in that, Two seventh electric telescopic rods (611) are symmetrically fixedly connected to the inner walls of both ends of the card plate (610). The telescopic ends of the seventh electric telescopic rods (611) are fixedly connected to retaining rings (612). Multiple rollers (613) are rotatably connected to the side walls of the two retaining rings (612) at opposite ends.

10. A busbar load distribution method, applied to a distribution cabinet with overload protection as described in any one of claims 1-9, characterized in that: Includes the following steps: S1: Control the second electric telescopic rod (44) to start, push the limiting round plate (45) to push each wire to the side of the inlet hole (3), so that the wire is bent above the layer plate (2). Then, control the first electric telescopic rod (42) to start, drive the first clamping ring (43) to fix the two ends of the multiple wires above the layer plate (2), and complete the installation and positioning of the wires. When the main body of the distribution cabinet (1) is running normally, the current transformers (7) are used to detect the current of the connected wires in real time. When the current of a certain circuit reaches the preset overload threshold, the circuit of that circuit is immediately disconnected to perform basic overload protection. S2: During the periodic inspection, control multiple sets of third electric telescopic rods (51) to start, driving the mounting ring (52) to move to the outside of each wire. Then, start the second electric slide rail (62) to drive the second slide plate (63), the fifth electric telescopic rod (64) and the adsorption shell (65) to move to the predetermined position. Control the fifth electric telescopic rod (64) to extend, so that the adsorption hole (67) contacts the outer wall of the wire. Then, start the air pump (66) to use negative pressure to firmly adsorb the adsorption shell (65) onto the single wire. Next, control the second electric telescopic rod (44) to retract, so that the limiting circular plate (45) retracts, and each wire becomes loose. At this time, control the fifth electric telescopic rod (64) to retract, pulling the adsorbed outer wire outward to make room for the inner wire. Finally, control the third electric telescopic rod (64) to retract. The sixth and seventh electric telescopic rods (611) drive the clamping plate (610) and the clamping ring (612) to work together to clamp and fix the wire, thereby effectively exposing the individual wires inside each wire. The first electric slide rail (54) is started, driving the first slide plate (55), the fourth electric telescopic rod (56) and the temperature sensor (58) to move to the exposed wire side. The fourth electric telescopic rod (56) is extended, so that the detection end of the temperature sensor (58) contacts the outer wall of the wire to measure the temperature. By moving the clamping ring (612) downward, the temperature of different sections of the wire can be continuously measured at multiple points to ensure the comprehensiveness of the data. When it is detected that the temperature of multiple wires in a certain wire is continuously high, it is determined that the busbar where the wire is located is overloaded and there is an overload risk. S3: Once S2 determines that a busbar is overloaded, the system immediately generates a load allocation command through the PLC controller to automatically and smoothly transfer some of the non-critical loads on that busbar to other buses with lower loads, thereby reducing the current load on high-risk buses and preventing overload from the source. During temperature detection, the heat from the wires is conducted to the mercury in the detection housing (510) through the heat-conducting rod (59). The mercury expands and pushes the moving plate (513) and the conductive plate (517), thereby changing the resistance value of the resistance plate (518). The change in resistance value The PLC controller collects and calculates data in real time, and dynamically adjusts the cooling intensity of the cooling plate (519) accordingly to achieve efficient and precise cooling of the wires. After the test is completed, the control adsorption shell (65) re-adsorbs the wires and pushes the wires together in the middle. Then, the control second electric telescopic rod (44) is started to reset the limiting circular plate (45) and re-limit each wire in a taut state. Finally, all actuators (such as the adsorption shell (65), retaining ring (612), etc.) return to their initial positions, and the multiple wires return to their original state before the test, waiting for the next test cycle.

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