Low-voltage power distribution cabinet

Abstract

The invention relates to the technical field of power distribution cabinets, in particular to a low-voltage power distribution cabinet which comprises a smoke alarm and a temperature alarm arranged in a cabinet body, and the smoke alarm and the temperature alarm are in signal connection with a controller. The trigger box is arranged in the cabinet body; the sliding rod is vertically arranged in the trigger, the upper end of the sliding rod penetrates through the top end of the trigger box and then is provided with an iron bar, and an electromagnet is arranged on the cabinet body opposite to the iron bar and is in signal connection with the controller; the micro-control switch is arranged in the trigger box, a trigger plate is arranged on the micro-control switch, a trigger bulge is arranged on the micro-control switch below the trigger plate, the micro-control switch is in signal connection with the signal transmitter, a signal receiver is arranged in the power supply box, and the signal receiver is in signal connection with the power distribution switch controller; the safety protection device has the advantages that power failure caused by program faults or module compatibility problems is avoided, and the requirements of a power system for high reliability and high stability of the safety protection device are met.

Description

Technical Field

[0001] This invention relates to the field of power distribution cabinet technology, specifically a low-voltage power distribution cabinet. Background Technology

[0002] Low-voltage switchgear, as a core device in the power system for distributing electrical energy and protecting electrical equipment, is widely used in industrial plants, commercial buildings, residential communities, and other scenarios. Its operational stability and safety are directly related to the reliability of the entire power supply network. With the continuous growth of power load and the diversification of electrical equipment, low-voltage switchgear often experiences overheating due to problems such as aging wiring, loose connections, and component failures. If not handled in time, this can easily lead to the combustion of the insulation layer, producing a large amount of smoke and potentially causing a fire.

[0003] Some existing low-voltage distribution cabinets are also equipped with alarm and power-off control to handle the above-mentioned accidents. However, the alarm and power-off control of existing equipment are mostly designed separately. Even if the sensor accurately detects the danger signal, it is usually still necessary to manually operate the distribution switch to cut off the power. There is a time delay in this process, which may cause the fire to spread, resulting in equipment damage or even personal injury.

[0004] After a period of development, although some low-voltage distribution cabinets have the function of automatic power-off, their triggering mechanism mostly relies on complex software programs or multiple independent control modules working together. This not only increases the manufacturing cost and maintenance difficulty of the equipment, but may also cause the power-off function to fail due to program failure or module compatibility issues, thus failing to meet the power system's requirements for high reliability and high stability of safety protection devices. Summary of the Invention

[0005] In view of this, the present invention provides a low-voltage distribution cabinet, which aims to solve the above problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a low-voltage distribution cabinet, comprising, The cabinet contains a smoke alarm and a temperature alarm, and the smoke alarm and temperature alarm are respectively connected to the controller signal. The trigger box is located inside the cabinet. A sliding rod is vertically installed inside the trigger box. Its upper end passes through the top of the trigger box and is equipped with an iron bar. An electromagnet is installed on the cabinet opposite the iron bar. The electromagnet is signal-connected to the controller. When the electromagnet is energized, the iron bar is attached to the electromagnet. When the smoke alarm and temperature alarm are alarmed at the same time, the controller controls the electromagnet to be de-energized. At this time, the iron bar falls, and the iron bar drives the sliding rod to fall. A micro-control switch is installed inside the trigger box, and a trigger plate is installed on it. A trigger protrusion is installed on the micro-control switch below the trigger plate. The micro-control switch is connected to the signal transmitter. A signal receiver is installed inside the power supply box and is connected to the power distribution switch controller. When the sliding rod is lowered, it will press the trigger plate through the trigger component until the trigger plate contacts the trigger protrusion, and the power distribution switch controller will be de-energized.

[0007] A further improvement of the present invention is that the triggering assembly includes a rotating rod, which is rotatably and horizontally disposed in a trigger box below the sliding rod. A fixed rod is horizontally disposed at the first end of the rotating rod, the fixed rod being perpendicular to the rotating rod. The lower end of the sliding rod is opposite to the fixed rod. A pressure plate is horizontally disposed at the second end of the rotating rod, the pressure plate being parallel to the fixed rod. A trigger plate is disposed below the pressure plate.

[0008] A further improvement of the present invention is that the triggering component is connected to the reset component. When the electromagnet is restored to power, the iron bar on the sliding rod rises under the action of the electromagnet until it is in contact with the electromagnet. The iron bar drives the sliding rod to disengage from the triggering component. At this time, the reset component drives the triggering component to reset, the triggering component disengages from the trigger plate, the trigger plate disengages from the trigger protrusion, and the micro-control switch is de-energized. The signal of the micro-control switch being de-energized is sent to the signal transmitter. Then the signal transmitter sends the power-on signal to the signal receiver. The signal receiver transmits the power-on signal to the power distribution switch controller, and the power distribution switch controller is energized.

[0009] A further improvement of the present invention is that the reset component includes: The lifting rod is vertically mounted and can slide up and down inside the trigger box on one side of the rotating rod; A pull rod is horizontally mounted on the rotating rod and parallel to the fixed rod. A first guide post is provided at the end of the pull rod. A first elongated slot at the upper end of the lifting rod is slidably connected to the first guide post. A second elongated slot at the lower end of the lifting rod is slidably connected to a second guide post inside the trigger box. The first elongated slot and the second elongated slot are perpendicular to each other. A first fixed post is provided on the pull rod on one side of the first guide post. A second fixed post is provided on one side of the middle part of the lifting rod. The first fixed post and the second fixed post are connected by a spring.

[0010] A further improvement of the present invention is that the lower end of the sliding rod is provided with a rotatable roller.

[0011] A further improvement of the present invention is that a fire extinguishing component is provided inside the cabinet.

[0012] A further improvement of the present invention is that the fire extinguishing assembly includes: Multiple fire extinguishing pipes are installed at intervals and vertically inside the cabinet, and each fire extinguishing pipe is equipped with multiple nozzles that face the equipment inside the cabinet. The main pipe is located at the top of the cabinet and is connected to each fire extinguishing pipe. The main pipe is connected to the tank containing the fire extinguishing agent, and the tank is connected to the controller signal.

[0013] A further improvement of the present invention is that a shielding component is provided above the cabinet.

[0014] A further improvement of the present invention is that the blocking component includes: A shielding cavity is located above the cabinet body, with its bottom connected to the top of the cabinet body, and the side of the shielding cavity facing the cabinet door is open; A baffle plate is disposed within the baffle cavity and extends or retracts from the baffle cavity under the drive of the moving component. The baffle plate has a blocking plate adapted to the opening on the side facing the opening.

[0015] A further improvement of the present invention is that the moving component includes: The screw is horizontally positioned inside the shielding cavity below the shielding plate and rotates under the drive of the motor; A movable sleeve is threadedly connected to and passes through the screw; The connecting rod has its first end connected to the movable sleeve and its second end connected to the lower end of the side of the baffle plate near the opening.

[0016] The technological advancements achieved by this invention due to the adoption of the above technical solutions are as follows: This invention provides a low-voltage distribution cabinet that, through its integrated structural design, achieves precise linkage between alarms and automatic power-off. When the smoke alarm and temperature alarm in the cabinet simultaneously detect danger signals (smoke and high temperature), the controller directly controls the electromagnet to de-energize, which in turn triggers a micro-switch by lowering a sliding rod, ultimately achieving automatic power-off of the distribution switch controller. Compared with existing technologies, this "dual alarm trigger + mechanical linkage power-off" mode completely eliminates the time delay of manual operation, enabling rapid power cut-off in the early stages of an accident, effectively preventing the spread of fire, and significantly reducing the risk of equipment damage and personnel casualties. Simultaneously, the overall structure relies on mechanical transmission and simple electrical control logic, offering higher reliability compared to complex software programs or multiple independent modules. This avoids power-off failures caused by program malfunctions or module compatibility issues, meeting the high reliability and stability requirements of power systems for safety protection devices.

[0017] In this invention, the lever-type triggering structure, composed of a rotating rod, a fixed rod, and a pressure plate, transforms the vertical downward motion of the sliding rod into a vertical pressing action of the pressure plate on the trigger plate. This not only amplifies the force of the sliding rod's descent, ensuring stable contact between the trigger plate and the trigger protrusion and preventing trigger failure due to insufficient force, but also buffers the impact force of the sliding rod's descent through the lever principle, reducing mechanical damage to the micro-switch and extending its service life. Furthermore, this structure is simple in design, with easy-to-process and replace components, reducing the difficulty and cost of equipment maintenance, while ensuring the efficiency and consistency of the power-off triggering process, further enhancing the safety protection performance of the low-voltage distribution cabinet.

[0018] In this invention, the design of the reset component enables automatic reset and power restoration after a power outage. When the electromagnet is powered back up, the sliding rod drives the iron bar to rise and disengage from the trigger component. At this time, the reset component can quickly reset the trigger component, causing the trigger plate to disengage from the trigger protrusion. The micro-control switch is then powered off and sends a power-on signal, which is ultimately controlled by the signal transmitter and receiver to power on the distribution switch controller. This automatic reset mechanism eliminates the need for manual operation, significantly shortening the power restoration time after an accident and improving the continuity and reliability of power supply. Furthermore, the reset process relies on mechanical structure and signal linkage, ensuring precise and stable operation and avoiding errors that may occur during manual operation, further reducing the risks associated with equipment operation and maintenance.

[0019] In this invention, the cooperation of the lifting rod, pull rod, two guide columns, and spring converts the rotation of the rotating rod into the up-and-down sliding of the lifting rod. Simultaneously, the spring force ensures that the trigger component returns to its initial position quickly and accurately during reset, preventing reset failure due to component jamming. The perpendicular design of the first and second elongated slots restricts the movement trajectory of the lifting rod, ensuring it does not deviate during sliding and further improving the accuracy of the reset action. Furthermore, the buffering effect of the spring in this structure reduces the impact force between components during reset, extending the service life of parts and reducing equipment maintenance frequency and costs. The overall structural design is scientific and reasonable, not only realizing the automatic reset function but also further enhancing the stability and safety of the reset process, providing a strong guarantee for the continuous and reliable operation of the low-voltage distribution cabinet.

[0020] In this invention, by setting a rotatable roller at the lower end of the sliding rod, the sliding friction between the sliding rod and the fixed rod is converted into rolling friction, significantly reducing the frictional force when they come into contact. This design brings multiple benefits: Firstly, the reduced friction ensures smoother descent of the sliding rod, avoiding descent delays or jamming caused by excessive frictional resistance, ensuring timely power-off triggering, and further improving the safety protection response speed of the equipment; secondly, the wear generated by rolling friction is much less than that of sliding friction, effectively reducing mechanical wear on the sliding rod and the fixed rod, extending their service life, and reducing equipment maintenance costs and replacement frequency; at the same time, smooth movement also reduces the impact on the fixed rod during the descent of the sliding rod, avoiding component deformation or damage caused by impact, ensuring the structural stability of the triggering component, and providing a guarantee for the long-term reliable operation of the power-off triggering mechanism.

[0021] This invention achieves integrated safety protection of "alarm-power-off-fire suppression" by incorporating a fire extinguishing component. When overheating and combustion occur inside the cabinet, while smoke and temperature alarms trigger and power is cut off, the fire extinguishing component actively initiates fire suppression operations to extinguish the fire source or control its spread, preventing further escalation of the fire. This significantly enhances the low-voltage distribution cabinet's ability to respond to fire accidents, making it particularly suitable for scenarios where aging wiring or component failures can rapidly ignite a fire. The addition of the fire extinguishing component further improves the safety protection system of the low-voltage distribution cabinet, upgrading it from "passive protection" to "active prevention," further reducing the risk of equipment damage, property loss, and personal injury caused by fire accidents, and providing more comprehensive protection for the safe and stable operation of the power system.

[0022] In this invention, the specific structural design of the fire extinguishing components ensures the high efficiency and comprehensiveness of fire suppression operations. Multiple vertically spaced fire extinguishing pipes and nozzles facing the equipment inside the cabinet achieve full coverage of all areas within the cabinet, avoiding blind spots and ensuring that fire sources are extinguished quickly and accurately. The connection between the main pipe and the tank ensures a stable supply of extinguishing agent, while the signal connection between the tank and the controller allows the fire extinguishing components to be linked with alarm and power-off mechanisms. Upon detecting a danger signal, the fire extinguishing operation is initiated promptly, achieving a seamless "alarm-power-off-fire extinguishing" sequence and further shortening fire response time. Simultaneously, the independent design of the extinguishing agent tank facilitates later inspection, replacement, and replenishment, reducing equipment maintenance difficulty and ensuring the fire extinguishing components remain in effective working condition for a long time, providing continuous protection for the safe operation of the low-voltage distribution cabinet.

[0023] In this invention, a shielding component is installed above the cabinet. The shielding component can block sunlight and rain, so that when the operator is inspecting or repairing the equipment inside the cabinet, the local high temperature caused by sunlight can be reduced, the physical exertion caused by the hot environment can be reduced, and the comfort of the operator during maintenance can be improved. At the same time, the operator does not need to interrupt the operation hastily due to sudden weather changes, ensuring the continuity and safety of the maintenance work. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the low-voltage distribution cabinet described in this invention; Figure 2 This is a schematic diagram of the triggering component of the low-voltage distribution cabinet described in this invention; Figure 3 This is a schematic diagram of the reset assembly of the low-voltage distribution cabinet described in this invention; Figure 4 This is a schematic diagram of the fire extinguishing components of the low-voltage distribution cabinet described in this invention; Figure 5 This is a schematic diagram of the shielding component of the low-voltage distribution cabinet described in this invention.

[0026] Explanation of reference numerals in the attached figures: 10-Cabinet, 101-Smoke Alarm, 102-Temperature Alarm, 11-Trigger Box, 111-Sliding Rod, 112-Iron Bar, 113-Roller, 12-Electromagnet, 13-Micro Switch, 131-Trigger Plate, 132-Trigger Protrusion, 133-Signal Transmitter, 21-Rotating Rod, 22-Fixing Rod, 23-Pressure Plate, 30-Reset Assembly, 31-Lifting Rod, 311-First Long Slot 312-Second long slot, 313-Second fixed post, 32-Pull rod, 321-First guide post, 322-First fixed post, 33-Second guide post, 34-Spring, 40-Fire extinguishing assembly, 41-Fire extinguishing pipe, 411-Nozzle, 42-Main pipe, 43-Tank body, 50-Shielding assembly, 51-Shielding cavity, 52-Shielding plate, 53-Screw, 54-Motor, 55-Moving sleeve, 56-Connecting rod. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, in the following description, specific details such as particular system structures and technologies are set forth for illustrative purposes rather than for limiting purposes, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art should understand that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary details.

[0028] This invention provides a low-voltage distribution cabinet, as per the attached instruction manual. Figures 1 to 5 It can be seen that a low-voltage distribution cabinet mainly includes the following parts or components: cabinet body 10, trigger box 11, sliding rod 111, and micro-control switch 13.

[0029] In this invention, a smoke alarm 101 and a temperature alarm 102 are installed inside the cabinet 10, and the smoke alarm 101 and the temperature alarm 102 are respectively connected to a controller (not shown in the figure). A trigger box 11 is installed inside the cabinet 10. A sliding rod 111 is vertically installed inside the trigger box 11, and its upper end passes through the top of the trigger box 11 and is provided with an iron bar 112. An electromagnet 12 is installed on the cabinet 10 opposite to the iron bar 112. The electromagnet 12 is connected to the controller. When the electromagnet 12 is energized, the iron bar 112 is attached to the electromagnet 12. When the smoke alarm 101 and the temperature alarm 102 alarm simultaneously, the controller controls the electromagnet 12 to be de-energized. At this time, the iron bar 112 falls, and the iron bar 112 drives the sliding rod 111 to fall. The micro-control switch 13 is set in the trigger box 11, and a trigger plate 131 is set on it. The micro-control switch 13 below the trigger plate 131 is set with a trigger protrusion 132. The micro-control switch 13 is connected to the signal transmitter 133. A signal receiver (not shown in the figure) is set in the external power supply box (not shown in the figure). The signal receiver is connected to the power distribution switch controller (not shown in the figure). When the sliding rod 111 falls, it will press the trigger plate 131 through the trigger component until the trigger plate 131 contacts the trigger protrusion 132, and the power distribution switch controller will be de-energized.

[0030] When both excessive smoke concentration and excessively high temperature occur simultaneously inside cabinet 10, smoke alarm 101 and temperature alarm 102 detect the abnormal signals and immediately send alarm signals to the controller. Upon receiving the alarm signals from both alarms, the controller sends a power-off command to electromagnet 12. Upon receiving the power-off command, electromagnet 12 stops receiving power and loses its magnetism. At this time, the iron bar 112, which is attracted to electromagnet 12, loses its magnetic attraction and begins to fall under the influence of gravity. Since the iron bar 112 is connected to the sliding rod 111, the falling iron bar 112 causes the sliding rod 111 to fall vertically together within trigger box 11. As the sliding rod 111 falls, its lower end contacts the trigger component, which presses down on the trigger plate 131. As the sliding rod 111 continues to fall, the trigger plate 131 is pressed down until it contacts the trigger protrusion 132. When the trigger plate 131 contacts the trigger protrusion 132, the micro-switch 13 is triggered, immediately sending a signal to the signal transmitter 133. The signal transmitter 133 encodes the received signal and transmits it wirelessly or via wired connection. The signal receiver inside the power supply box monitors the signal in real time. Upon receiving a signal from the signal transmitter 133, it decodes and identifies the signal, transmitting the decoded signal to the power distribution switch controller. Based on the received signal, the power distribution switch controller immediately issues a power-off command, controlling the power distribution switch to disconnect, cutting off the power to the cabinet 10 and related equipment. This prevents potential fires caused by smoke and high temperatures, ensuring the safety of equipment and personnel.

[0031] This "dual alarm trigger + mechanical linkage power cut-off" mode completely eliminates the time delay of manual operation, enabling rapid power cut-off in the early stages of an accident, effectively preventing the spread of fire and significantly reducing the risk of equipment damage and personal injury. Meanwhile, the overall structure relies on mechanical transmission and simple electrical control logic, offering higher reliability compared to complex software programs or multiple independent modules. This avoids power outage failures caused by program malfunctions or module compatibility issues, meeting the high reliability and stability requirements of power systems for safety protection devices.

[0032] Specifically, the ventilation openings on cabinet 10 are existing ventilation openings, but can be made into different styles of ventilation openings to suit different environments.

[0033] As one embodiment, according to the appendix to the specification Figure 2 It is known that the triggering component includes a rotating rod 21, which is rotatably and horizontally disposed in the trigger box 11 below the sliding rod 111. A fixed rod 22 is horizontally disposed at its first end, which is perpendicular to the rotating rod 21. The lower end of the sliding rod 111 is opposite to the fixed rod 22. A pressure plate 23 is horizontally disposed at the second end of the rotating rod 21, which is parallel to the fixed rod 22. A trigger plate 131 is located below the pressure plate 23.

[0034] During the descent of the sliding rod 111, its lower end first contacts the fixed rod 22 at the first end of the rotating rod 21. As the sliding rod 111 continues to fall, it exerts a downward force on the fixed rod 22. The rotating rod 21 is horizontally rotatable within the trigger box 11. According to the lever principle, the rotating rod 21 will rotate around its rotation center. When the rotating rod 21 rotates, the pressure plate 23 at its second end will move downward, eventually pressing down on the trigger plate 131 below. As the pressure plate 23 continues to press down, the trigger plate 131 also gradually moves downward. When the pressure plate 23 continues to press down on the trigger plate 131, causing the trigger plate 131 to contact the trigger protrusion 132 on the micro-control switch 13, the micro-control switch 13 is triggered. The micro-control switch 13 immediately sends a signal to the signal transmitter 133, which is transmitted wirelessly or via wired means. The signal receiver in the power supply box monitors and receives the signal from the signal transmitter 133 in real time and transmits the signal to the power distribution switch controller. Based on the received signal, the power distribution switch controller immediately issues a power-off command to control the power distribution switch to open, cutting off the power supply to cabinet 10 and related equipment to prevent more serious safety accidents caused by smoke and high temperature.

[0035] The vertical downward motion of the sliding rod 111 is converted into a vertical pressing action of the pressure plate 23 on the trigger plate 131. This not only amplifies the downward force of the sliding rod 111, ensuring that the trigger plate 131 can stably contact the trigger protrusion 132 and avoid trigger failure due to insufficient force, but also buffers the impact force of the sliding rod 111's fall through the lever principle, reducing mechanical damage to the micro-switch 13 and extending its service life. Furthermore, this structure is simple in design, and the components are easy to process and replace, reducing the difficulty and cost of equipment maintenance. At the same time, it ensures the efficiency and consistency of the power-off triggering process, further enhancing the safety protection performance of the low-voltage distribution cabinet.

[0036] In this embodiment, according to the appendix to the specification... Figure 3It is known that the trigger component is connected to the reset component 30. When the electromagnet 12 is restored to power, the iron bar 112 on the sliding rod 111 rises under the action of the electromagnet 12 until it is in contact with the electromagnet 12. The iron bar 112 drives the sliding rod 111 to disengage from the trigger component. At this time, the reset component 30 drives the trigger component to reset, the trigger component disengages from the trigger plate 131, the trigger plate 131 disengages from the trigger protrusion 132, causing the micro-control switch 13 to be de-energized. The signal of the micro-control switch 13 being de-energized is sent to the signal transmitter 133. Then the signal transmitter 133 sends the energizing signal to the signal receiver. The signal receiver sends the energizing signal to the power distribution switch controller, and the power distribution switch controller is energized. The reset component 30 includes a lifting rod 31 and a pull rod 32. The lifting rod 31 is vertically and slidably disposed in the trigger box 11 on one side of the rotating rod 21. The pull rod 32 is horizontally disposed on the rotating rod 21 and parallel to the fixed rod 22. The pull rod 32 has a first guide post 321 at its end. The first elongated slot 311 at the upper end of the lifting rod 31 is slidably connected to the first guide post 321. The second elongated slot 312 at the lower end of the lifting rod 31 is slidably connected to the second guide post 33 in the trigger box 11. The first elongated slot 311 and the second elongated slot 312 are perpendicular to each other. The pull rod 32 on one side of the first guide post 321 has a first fixed post 322. The middle part of the lifting rod 31 has a second fixed post 313 on one side. The first fixed post 322 and the second fixed post 313 are connected by a spring 34.

[0037] After the relevant personnel eliminated the smoke and abnormal temperature faults inside the cabinet 10, they restored the power supply to the electromagnet 12. When the electromagnet 12 was energized, it generated magnetism and tightly attracted the iron bar 112. The iron bar 112 drove the sliding rod 111 to move upward until the iron bar 112 was in contact with the electromagnet 12. As the sliding rod 111 rose, its lower end gradually detached from the fixed rod 22 at the first end of the rotating rod 21 and no longer exerted force on the fixed rod 22. In the reset assembly 30, since the first fixed post 322 and the second fixed post 313 are connected by the spring 34, the spring 34 begins to function after the sliding rod 111 detaches from the fixed rod 22. When spring 34 contracts, the first elongated slot 311 at the upper end of the lifting rod 31 is slidably connected to the first guide post 321 at the end of the pull rod 32, and the second elongated slot 312 at the lower end is slidably connected to the second guide post 33 inside the trigger box 11. Under the combined action of the spring 34 contraction and the two elongated slots and the two guide posts, the lifting rod 31 will move downward and produce a certain tilt displacement. The movement of the lifting rod 31 will drive the pull rod 32 to move. Since the pull rod 32 is horizontally set on the rotating rod 21, the pull rod 32 will pull the rotating rod 21 to rotate in the opposite direction around its rotation center, so that the rotating rod 21 gradually returns to its initial horizontal state. After the rotating rod 21 resets, the pressure plate 23 at its second end lifts upward and disengages from the lower contact. The trigger plate 131 moves upward under its own elastic force and disengages from the trigger protrusion 132. After the trigger plate 131 disengages from the trigger protrusion 132, the micro-control switch 13 returns to the non-triggered state and stops sending the previous power-off holding signal. In fact, it is equivalent to the micro-control switch 13 being in the initial non-triggered energized state after the power-off. The change in the state of the micro-control switch 13 triggers the signal transmitter 133 to send an energized signal. The signal receiver in the power supply box receives the energized signal transmitted by the signal transmitter 133 and transmits the signal to the power distribution switch controller. The power distribution switch controller controls the power distribution switch to energize according to the received signal, restoring the power supply to the cabinet 10 and related equipment, so that the device returns to the normal monitoring state.

[0038] The cooperation of the lifting rod 31, pull rod 32, first guide post 321, second guide post 33, and spring 34 transforms the rotation of the rotating rod 21 into the up-and-down sliding of the lifting rod 31. Simultaneously, the elasticity of the spring 34 ensures that the trigger component returns to its initial position quickly and accurately during reset, preventing reset failure due to component jamming. The vertical design of the first elongated slot 311 and the second elongated slot 312 restricts the movement trajectory of the lifting rod 31, ensuring it does not deviate during sliding and further improving the accuracy of the reset action. Furthermore, the buffering effect of the spring 34 in this structure reduces the impact force between components during reset, extending the service life of parts and reducing equipment maintenance frequency and costs. The overall structural design is scientific and reasonable, not only realizing the automatic reset function but also further enhancing the stability and safety of the reset process, providing a strong guarantee for the continuous and reliable operation of the low-voltage distribution cabinet.

[0039] As one embodiment, according to the appendix to the specification Figure 2 It is known that a rotatable roller 113 is provided at the lower end of the sliding rod 111. This converts the sliding friction between the sliding rod 111 and the fixed rod 22 into rolling friction, significantly reducing the frictional force when they come into contact. This design brings multiple benefits. On the one hand, the reduced friction ensures that the sliding rod 111 falls more smoothly, avoiding delays or jamming caused by excessive frictional resistance, ensuring timely power-off triggering, and further improving the safety protection response speed of the equipment. On the other hand, the wear generated by rolling friction is much less than that of sliding friction, effectively reducing the mechanical wear of the sliding rod 111 and the fixed rod 22, extending their service life, and reducing the maintenance cost and replacement frequency of the equipment. Simultaneously, the smooth movement also reduces the impact of the sliding rod 111 on the fixed rod 22 during its descent, avoiding component deformation or damage caused by impact, ensuring the structural stability of the triggering component, and providing a guarantee for the long-term reliable operation of the power-off triggering mechanism.

[0040] As one embodiment, according to the appendix to the specification Figure 4 It is known that a fire extinguishing assembly 40 is installed inside the cabinet 10. The fire extinguishing assembly 40 includes multiple fire extinguishing pipes 41, which are spaced apart and vertically installed inside the cabinet 10. Multiple nozzles 411 facing the equipment inside the cabinet 10 are installed on the fire extinguishing pipes 41. The main pipe 42 is located at the top of the cabinet 10 and is connected to each fire extinguishing pipe 41. The main pipe 42 is connected to a tank 43 containing fire extinguishing agent. The tank 43 is connected to the controller signal.

[0041] Simultaneously with the triggering of the micro-switch 13, the controller sends a formal release command to the tank 43 containing the extinguishing agent. Upon receiving the command, the tank 43 opens the final release valve, and the high-pressure extinguishing agent inside rapidly flows into each extinguishing pipe 41 through the main pipe 42. Then, it is sprayed from multiple nozzles 411 on the extinguishing pipes 41 towards the equipment inside the cabinet 10 to extinguish any potential fire sources, suppress the spread of fire, and protect the safety of the equipment inside the cabinet 10.

[0042] By incorporating the fire extinguishing component 40, integrated safety protection encompassing "alarm-power-off-fire extinguishing" is achieved. When overheating and combustion occur inside the cabinet 10, while the smoke alarm 101 and temperature alarm 102 trigger alarms and power is cut off, the fire extinguishing component 40 actively initiates fire extinguishing operations to promptly extinguish the fire source or control its spread, preventing further escalation of the fire. This significantly enhances the low-voltage distribution cabinet's ability to respond to fire accidents, making it particularly suitable for scenarios where aging wiring or component failures can rapidly ignite a fire. The addition of the fire extinguishing component 40 further improves the safety protection system of the low-voltage distribution cabinet, upgrading it from "passive protection" to "active prevention," further reducing the risk of equipment damage, property loss, and personal injury caused by fire accidents, and providing more comprehensive protection for the safe and stable operation of the power system.

[0043] Specifically, the extinguishing agent can be a gaseous extinguishing agent or a solid extinguishing agent.

[0044] As one embodiment, according to the appendix to the specification Figure 5 It is known that a shielding assembly 50 is provided above the cabinet 10. The shielding assembly 50 includes a shielding cavity 51, which is located above the cabinet 10 and whose bottom is connected to the top of the cabinet 10. The shielding cavity 51 has an opening on the side facing the cabinet door (not shown in the figure). A shielding plate 52 is located inside the shielding cavity 51 and extends or retracts from the shielding cavity 51 under the drive of the moving assembly. A blocking plate adapted to the opening is provided on the side of the shielding plate 52 facing the opening (not shown in the figure). The moving assembly includes a screw 53, which is horizontally located in the shielding cavity 51 below the shielding plate 52 and rotates under the drive of the motor 54. A moving sleeve 55 is threadedly connected to and passes through the screw 53. The first end of the connecting rod 56 is connected to the moving sleeve 55, and the second end is connected to the lower end of the shielding plate 52 near the opening.

[0045] Upon receiving the start command from the operator, the control system immediately sends a start signal to the motor 54 in the moving assembly. Upon receiving the signal, the motor 54 begins operation, driving the screw 53 to rotate horizontally. Because the moving sleeve 55 is threadedly connected to the screw 53, it moves along the axial direction of the screw 53 under the rotation of the screw 53. During this movement, the moving sleeve 55 connects to the lower end of the baffle plate 52 near the opening via the connecting rod 56. As the moving sleeve 55 moves, the connecting rod 56 pulls the baffle plate 52, causing it to gradually extend from the baffle cavity 51 until it forms a shielding surface, providing the operator with a space for sun or rain protection. At this time, the operator can safely and comfortably operate the cabinet 10 under the baffle plate 52, such as checking the equipment's operating status or replacing parts.

[0046] This invention provides a low-voltage distribution cabinet, and its specific usage method is as follows: When a fire hazard arises inside cabinet 10 due to equipment malfunction or other reasons, causing both smoke concentration and temperature to reach the alarm threshold simultaneously, smoke alarm 101 and temperature alarm 102 simultaneously issue alarm signals and transmit the signals to the controller. Upon receiving the dual alarm signals, the controller immediately de-energizes electromagnet 12. At this time, the iron bar 112, which was originally attracted to electromagnet 12, loses its magnetic attraction and falls under the influence of gravity. The iron bar 112 drives the sliding rod 111 connected to it to fall vertically. The lower end of the sliding rod 111 is equipped with a rotatable roller 113, which reduces friction with the triggering component and makes the falling process smoother. During the falling process, the sliding rod 111 presses the trigger plate 131 through the triggering component. Specifically, the lower end of the sliding rod 111 is opposite to the fixed rod 22 on the rotating rod 21 in the triggering component. The falling of the sliding rod 111 pushes the fixed rod 22, causing the rotating rod 21 to rotate around its rotation axis. The pressure plate 23 at the other end of the rotating rod 21 moves downwards, pressing the trigger plate 131 until it contacts the trigger protrusion 132 on the micro-control switch 13. After the micro-control switch 13 is triggered, it sends a power-off signal to the signal receiver through the signal transmitter 133. The signal receiver transmits the signal to the power distribution switch controller, which immediately cuts off the power supply to the power distribution cabinet to prevent the fault from spreading further and to ensure the safety of surrounding equipment and personnel. While controlling the electromagnet 12 to cut off the power, the controller also sends a command to the tank 43 containing the extinguishing agent. After receiving the command, the tank 43 delivers the extinguishing agent to the main pipe 42, and then distributes it to the various fire extinguishing pipes 41 vertically installed in the cabinet 10 through the main pipe 42. Multiple nozzles 411 on the fire extinguishing pipe 41 are directed towards the equipment inside the cabinet 10, spraying the extinguishing agent evenly to extinguish the fire and minimize fire damage. When it is confirmed that the fire hazard has been eliminated and the distribution cabinet needs to be reset, the power supply to the electromagnet 12 is first restored. The electromagnet 12 generates magnetic force, attracting the iron bar 112 to rise. The iron bar 112 drives the sliding rod 111 to rise until the iron bar 112 is reattached to the electromagnet 12. At this point, the sliding rod 111 disengages from the trigger assembly. The reset assembly 30 then uses the rotating rod 21 to disengage the pressure plate 23 from the trigger plate 131. The signal of the micro-switch 13 being de-energized is sent to the signal receiver via the signal transmitter 133. The signal receiver transmits the energization signal to the distribution switch controller, which re-energizes the distribution switch controller, restoring the distribution cabinet to normal power supply and allowing it to continue operation. When operators use the distribution cabinet outdoors and encounter strong sunlight or rain, requiring shade or rain protection, the shading assembly 50 can be activated for this purpose.

[0047] It should be noted that in this patent application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A low-voltage distribution cabinet, characterized in that, include, The cabinet contains a smoke alarm and a temperature alarm, and the smoke alarm and temperature alarm are respectively connected to the controller signal. The trigger box is located inside the cabinet. A sliding rod is vertically installed inside the trigger box. Its upper end passes through the top of the trigger box and is equipped with an iron bar. An electromagnet is installed on the cabinet opposite the iron bar. The electromagnet is signal-connected to the controller. When the electromagnet is energized, the iron bar is attached to the electromagnet. When the smoke alarm and temperature alarm are alarmed at the same time, the controller controls the electromagnet to be de-energized. At this time, the iron bar falls, and the iron bar drives the sliding rod to fall. A micro-control switch is installed inside the trigger box, and a trigger plate is installed on it. A trigger protrusion is installed on the micro-control switch below the trigger plate. The micro-control switch is connected to the signal transmitter. A signal receiver is installed inside the power supply box and is connected to the power distribution switch controller. When the sliding rod is lowered, it will press the trigger plate through the trigger component until the trigger plate contacts the trigger protrusion, and the power distribution switch controller will be de-energized.

2. A low-voltage distribution cabinet according to claim 1, characterized in that, The triggering assembly includes a rotating rod, which is rotatably and horizontally disposed in a trigger box below the sliding rod. A fixed rod is horizontally disposed at the first end of the rotating rod, and the fixed rod is perpendicular to the rotating rod. The lower end of the sliding rod is opposite to the fixed rod. A pressure plate is horizontally disposed at the second end of the rotating rod, and the pressure plate is parallel to the fixed rod. A trigger plate is disposed below the pressure plate.

3. A low-voltage distribution cabinet according to claim 2, characterized in that, The trigger component is connected to the reset component. When the electromagnet is powered back, the iron bar on the sliding rod rises under the action of the electromagnet until it is in contact with the electromagnet. The iron bar drives the sliding rod to disengage from the trigger component. At this time, the reset component drives the trigger component to reset. The trigger component disengages from the trigger plate, and the trigger plate disengages from the trigger protrusion, causing the micro-control switch to be de-energized. The signal of the micro-control switch being de-energized is sent to the signal transmitter. Then, the signal transmitter sends the power-on signal to the signal receiver. The signal receiver transmits the power-on signal to the power distribution switch controller, and the power distribution switch controller is energized.

4. A low-voltage distribution cabinet according to claim 3, characterized in that, The reset component includes: The lifting rod is vertically mounted and can slide up and down inside the trigger box on one side of the rotating rod; A pull rod is horizontally mounted on the rotating rod and parallel to the fixed rod. A first guide post is provided at the end of the pull rod. A first elongated slot at the upper end of the lifting rod is slidably connected to the first guide post. A second elongated slot at the lower end of the lifting rod is slidably connected to a second guide post inside the trigger box. The first elongated slot and the second elongated slot are perpendicular to each other. A first fixed post is provided on the pull rod on one side of the first guide post. A second fixed post is provided on one side of the middle part of the lifting rod. The first fixed post and the second fixed post are connected by a spring.

5. A low-voltage distribution cabinet according to claim 2, characterized in that, The lower end of the sliding rod is equipped with a rotatable roller.

6. A low-voltage distribution cabinet according to claim 2, characterized in that, The cabinet is equipped with fire extinguishing components.

7. A low-voltage distribution cabinet according to claim 6, characterized in that, The fire extinguishing assembly includes: Multiple fire extinguishing pipes are installed at intervals and vertically inside the cabinet, and each fire extinguishing pipe is equipped with multiple nozzles that face the equipment inside the cabinet. The main pipe is located at the top of the cabinet and is connected to each fire extinguishing pipe. The main pipe is connected to the tank containing the fire extinguishing agent, and the tank is connected to the controller signal.

8. A low-voltage distribution cabinet according to claim 1, characterized in that, The cabinet is equipped with a shielding component on top.

9. A low-voltage distribution cabinet according to claim 8, characterized in that, The occlusion component includes: A shielding cavity is located above the cabinet body, with its bottom connected to the top of the cabinet body, and the side of the shielding cavity facing the cabinet door is open; A baffle plate is disposed within the baffle cavity and extends or retracts from the baffle cavity under the drive of the moving component. The baffle plate has a blocking plate adapted to the opening on the side facing the opening.

10. A low-voltage distribution cabinet according to claim 9, characterized in that, The moving component includes: The screw is horizontally positioned inside the shielding cavity below the shielding plate and rotates under the drive of the motor; A movable sleeve is threadedly connected to and passes through the screw; The connecting rod has its first end connected to the movable sleeve and its second end connected to the lower end of the side of the baffle plate near the opening.

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