Intelligent power grid distribution cabinet alarm device

Abstract

The application discloses a smart power grid distribution cabinet alarm device, belongs to the technical field of distribution cabinets, and aims to solve the problem that temperature sensors are prone to faults after long-time operation, which can easily cause power supply abnormalities, phase-to-phase short circuits, even induce electrical fires, and threaten the stable operation of a smart power grid. The application comprises a distribution cabinet body and a cabinet door rotatably connected to one side of the distribution cabinet body; a temperature sensor is fixedly installed in the distribution cabinet body; air outlet plates are installed on the two sides of the distribution cabinet body; a filter plate is installed on one side of the cabinet door; a heat dissipation fan is fixedly installed on one side of the filter plate; a control switch capable of being independently controlled to start and stop is arranged on one side of the heat dissipation fan; and a heat conduction shell is fixedly installed on one side of the cabinet door. The original electric temperature control is reserved as a daily main heat dissipation means; when the temperature sensor fails, the heat dissipation fan is independently triggered to start up in an emergency by a memory alloy thermal induced deformation mechanism, high temperature accumulated in the cabinet is timely dredged, and electrical components are prevented from being continuously burned by high temperature.

Description

Technical Field

[0001] This invention relates to the field of power distribution cabinet technology, specifically to an alarm device for a smart grid power distribution cabinet. Background Technology

[0002] As the core equipment for power distribution, monitoring, and protection in power distribution networks, smart grid distribution cabinets integrate numerous electrical components such as circuit breakers, busbars, intelligent monitoring and control devices, and relay protection elements. These devices continuously generate heat during sustained operation under load. To ensure that the operating temperature of these components remains within a safe range, smart grid distribution cabinets are generally equipped with an electrically controlled cooling system consisting of temperature sensors and cooling fans. The temperature sensors collect real-time temperature signals from inside the cabinet, and the controller automatically controls the start and stop of the cooling fans based on temperature thresholds. Simultaneously, an alarm device provides over-temperature warnings, thereby suppressing temperature rise inside the cabinet.

[0003] The temperature sensors in current smart grid distribution cabinet alarm devices are electronic components that operate continuously for extended periods. After prolonged operation, these sensors are prone to failure. When a temperature sensor fails, even if the actual temperature inside the distribution cabinet continues to rise, the sensor cannot collect or upload temperature data. The controller cannot recognize the high-temperature condition inside the cabinet and will not issue a start command to drive the cooling fan. The cooling system loses its forced ventilation capability, and heat continues to accumulate inside the cabinet without being able to dissipate. This can easily lead to power supply anomalies, phase-to-phase short circuits, or even electrical fires, threatening the stable operation of the smart distribution network.

[0004] To address the above issues, an alarm device for smart grid distribution cabinets is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an alarm device for smart grid distribution cabinets. By using this device, the problem in the background that temperature sensors are prone to failure after long-term operation can be easily caused by power supply abnormalities, phase-to-phase short circuits, or even electrical fires, threatening the stable operation of the smart distribution network can be solved.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The smart grid distribution cabinet alarm device includes a distribution cabinet body and a cabinet door rotatably connected to one side of the distribution cabinet body. A temperature sensor is fixedly installed inside the distribution cabinet body. Air outlet plates are installed on both sides of the distribution cabinet body. A filter plate is installed on one side of the cabinet door. A cooling fan is fixedly installed on one side of the filter plate. A control switch that can be independently controlled to start and stop is provided on one side of the cooling fan. A heat-conducting shell is fixedly installed on one side of the cabinet door. A shape memory alloy is installed inside the heat-conducting shell. The heat-conducting shell can effectively conduct the heat accumulated inside the distribution cabinet body, so that the heat is transferred to the shape memory alloy. A pressing component is slidably connected to one end of the heat-conducting shell, and one end of the shape memory alloy is fixedly connected to the pressing component. The heat inside the distribution cabinet body continues to accumulate and is transferred to the shape memory alloy through the heat-conducting shell. When the temperature reaches the shape memory alloy deformation trigger threshold, the shape memory alloy deforms and pushes the pressing component to press the control switch. After the control switch is turned on, the cooling fan is directly started.

[0007] Furthermore, the pressing component includes a push plate and a slide rod fixed to one side of the push plate. The push plate and the slide rod are slidably connected to the heat-conducting shell, one end of the shape memory alloy is fixedly connected to the push plate, and a rubber column is fixedly installed at one end of the slide rod.

[0008] Furthermore, sliders are fixedly installed on both sides of the push plate, and the sliders are slidably connected to the heat-conducting shell.

[0009] Furthermore, a ventilation component is provided on one side of the cabinet door to improve ventilation. The ventilation component includes a frame plate and several blades rotatably connected inside the frame plate. Each blade has a rotating plate fixedly installed at both ends. A vertical plate is rotatably connected to one side of the rotating plate, and a fixing plate is fixedly installed on one side of the vertical plate.

[0010] Furthermore, a snap-fit ​​component is installed on one side of the cabinet door. The snap-fit ​​component includes a connecting block and a spring correspondingly disposed inside the connecting block. The connecting block is fixedly connected to the cabinet door, and an arc-shaped block is slidably connected inside the connecting block, with the spring fixedly connected to the arc-shaped block.

[0011] Furthermore, a pusher for adjusting the opening and closing degree of the blades is slidably connected to one end of the heat-conducting shell; The pushing component includes a concave plate, which is slidably connected to the frame plate and fixedly connected to the fixing plate. A guide plate is fixedly installed on one side of the concave plate, and the guide plate is slidably connected to the heat-conducting shell and the connecting block respectively. The guide plate is in contact with the end of the shape memory alloy.

[0012] Furthermore, the guide plate has arc grooves on both sides that match the arc block.

[0013] Furthermore, an alarm device is installed on one side of the cabinet door. The alarm device includes an alarm and a stationary contact fixedly installed inside the heat-conducting shell. A wire is installed on one side of the stationary contact, and the wire passes through and connects to both the heat-conducting shell and one side of the cabinet door. The wire is also connected to the alarm.

[0014] Furthermore, a sliding plate is fixedly installed on one side of the push plate, and the sliding plate is slidably connected to the heat-conducting shell. A moving contact is fixedly installed on one side of the sliding plate.

[0015] Furthermore, a limiting groove is correspondingly formed inside the heat-conducting shell, and the slider is slidably connected to the limiting groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Conventional power distribution cabinets rely entirely on temperature sensors to electrically drive cooling fans. When the sensors fail, the cooling function is paralyzed. This device retains the original electrical temperature control as the main means of daily heat dissipation. When the temperature sensor fails, the shape memory alloy thermo-deformation mechanism independently triggers the cooling fan to start in an emergency, which promptly dissipates the high temperature accumulated in the cabinet, avoids the continuous high temperature burnout of electrical components, and reduces the additional energy consumption and resource loss caused by equipment failure downtime and component replacement.

[0017] 2. The two-stage deformation characteristics of shape memory alloy form a two-stage action mechanism: the first stage deformation triggers the cooling fan to force air cooling. If the air cooling circuit fails or the temperature continues to rise to the second stage threshold, the blades will be automatically driven to open fully, relying on natural convection to form a bottom-up ventilation, thus buying time for on-site repairs.

[0018] 3. When the push plate slides, it simultaneously drives the high-temperature resistant moving contact to contact the stationary contact and conduct the alarm circuit. Even when the electronic temperature measurement and electronic heat dissipation fail, it can still reliably issue an alarm, solving the hidden fault problem of traditional electronic alarms failing along with the sensor failure. It prevents the fault from continuing to deteriorate and causing large-area overheating damage to components and long-term power outages for emergency repairs, effectively reducing the additional energy loss caused by the fault.

[0019] 4. After the blades are fully open, the arc-shaped block is locked into the arc-shaped groove to complete the position lock. There is no need to rely on the shape memory alloy to continuously output thrust to maintain the ventilation state, which avoids fatigue aging caused by long-term continuous deformation of the shape memory alloy. After the fault is repaired, the guide plate can be manually pulled to unlock and reset, making operation and maintenance simple. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the main structure of the power distribution cabinet of the present invention; Figure 4 This is a schematic diagram of the cabinet door structure of the present invention; Figure 5 for Figure 4 Enlarged view at point B in the middle; Figure 6This is a schematic diagram of the ventilation component structure of the present invention; Figure 7 This is a schematic diagram of the alarm component structure of the present invention; Figure 8 for Figure 7 Enlarged view of point C in the middle.

[0021] In the diagram: 1. Distribution cabinet body; 2. Cabinet door; 3. Temperature sensor; 4. Air outlet plate; 5. Filter plate; 6. Cooling fan; 7. Control switch; 8. Heat-conducting shell; 81. Limit groove; 9. Shape memory alloy; 10. Pressing component; 101. Push plate; 102. Slide rod; 103. Rubber column; 104. Slider; 20. Ventilation component; 201. Frame plate; 202. Blade; 203. Rotating plate; 204. Vertical plate; 205. Fixing plate; 30. Snap-fit ​​component; 301. Connecting block; 302. Spring; 303. Arc block; 40. Pushing component; 401. Concave plate; 402. Guide plate; 403. Arc groove; 50. Alarm component; 501. Alarm; 502. Stationary contact; 503. Wire; 601. Slide plate; 602. Moving contact. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figures 1-4 As shown, the smart grid distribution cabinet alarm device includes a distribution cabinet body 1 and a cabinet door 2 rotatably connected to one side of the distribution cabinet body 1. A temperature sensor 3 is fixedly installed inside the distribution cabinet body 1. Air outlet plates 4 are installed on both sides of the distribution cabinet body 1. A filter plate 5 is installed on one side of the cabinet door 2. The filter plate 5 is set with the airflow channel and can filter the air entering the distribution cabinet body 1, blocking dust, lint, and impurities from entering the interior of the distribution cabinet body 1. A cooling fan 6 is fixedly installed on one side of the filter plate 5. The temperature sensor 3 and the cooling fan 6 are electrically connected through a controller. The controller is existing technology and is not shown in the figure. The temperature sensor 3 is a conventional temperature measuring component that collects the internal working temperature of the distribution cabinet body 1 in real time, forming a basic electrical control temperature measurement system. Under normal operating conditions, the temperature sensor 3 senses the temperature rise and provides a temperature basis for the automatic control of the cooling fan 6, realizing normalized intelligent temperature control and ensuring the stable daily operation of the distribution cabinet body 1.

[0024] To address the technical problem that temperature sensor 3 is prone to failure after prolonged operation, which can easily lead to power supply anomalies, phase-to-phase short circuits, and even electrical fires, threatening the stable operation of the smart distribution network, the following preferred technical solutions are provided: like Figures 1-4 As shown, a control switch 7 that can be independently controlled to start and stop is provided on one side of the cooling fan 6. The control switch 7 is electrically connected to the cooling fan 6 through the controller. The control switch 7 is independent of the original electrical control circuit composed of temperature sensor 3 and controller, forming an independent power supply and disconnection branch. In normal mode, the cooling fan 6 is controlled by the electrical control system. When the electrical control temperature control link fails, the power supply of the cooling fan 6 can be connected separately through the control switch 7, breaking away from the limitation of the electrical control system to achieve emergency forced cooling. This creates two non-conflicting fan start paths, eliminating the heat dissipation blind spot caused by the failure of a single electrical control path. A heat-conducting shell 8 is fixedly installed on one side of the cabinet door 2. The heat-conducting shell 8 contains a shape memory alloy 9. The heat-conducting shell 8 forms a high-efficiency heat transfer carrier, fully absorbing the heat carried by the hot air inside the power distribution cabinet body 1, and quickly transferring the temperature inside the cabinet to the internal shape memory alloy 9, reducing the temperature transfer lag and ensuring that the shape memory alloy 9 can accurately and timely sense the real high temperature state inside the cabinet. At the same time, the heat-conducting shell 8 also protects the shape memory alloy 9. The heat-conducting shell 8 can effectively conduct the heat accumulated inside the power distribution cabinet body 1, so that the heat is transferred to the shape memory alloy 9. The deformation trigger temperature of the shape memory alloy 9 is higher than the starting temperature of the cooling fan 6. The normal temperature rise of the equipment is regulated by the electronic control system. The mechanical mechanism only works when the electronic temperature control fails or an abnormal high temperature occurs, reducing the frequency of repeated deformation of the shape memory alloy 9. A pressing part 10 is slidably connected inside one end of the heat-conducting shell 8, and one end of the shape memory alloy 9 is fixedly connected to the pressing part 10. The pressing part 10 and the shape memory alloy 9 are rigidly fixedly connected. The deformation thrust generated by the shape memory alloy 9 when heated can be completely transferred to the pressing part 10. The power transmission efficiency is high, ensuring that the pressing part 10 can stably complete the pressing action after the temperature rise reaches the threshold, improving the stability of the mechanical triggering action. The heat inside the power distribution cabinet body 1 continues to accumulate and is transferred to the shape memory alloy 9 through the heat-conducting shell 8. When the temperature reaches the deformation trigger threshold of the shape memory alloy 9, the shape memory alloy 9 deforms and pushes the pressing part 10 to press the control switch 7. After the control switch 7 is turned on, the cooling fan 6 is started directly. Under normal operating conditions, the temperature sensor 3 inside the power distribution cabinet 1 continuously collects the ambient temperature inside the cabinet in real time. When the load inside the cabinet increases and the temperature rises, the temperature sensor 3 transmits the temperature signal to the controller, which then sends a command to drive the cooling fan 6 to run. Outside air is filtered by the filter plate 5 and then sent into the power distribution cabinet 1 to achieve normal forced ventilation and heat dissipation of the cabinet, ensuring that the internal electrical components are within a safe operating temperature range. At this time, the temperature inside the cabinet has not reached the deformation threshold of the shape memory alloy 9, so the shape memory alloy 9 maintains its original shape. The pressing part 10 is separated from the control switch 7, the control switch 7 remains in the off state, and the mechanical triggering branch does not participate in the work. When the temperature sensor 3 fails due to long-term operation, it cannot collect and upload the temperature signal inside the cabinet. The controller cannot know the temperature rise inside the cabinet and cannot automatically start the cooling fan 6 to dissipate heat. Heat continues to accumulate inside the power distribution cabinet body 1. The high temperature inside the power distribution cabinet body 1 is continuously conducted to the shape memory alloy 9 arranged inside it through the heat conduction shell 8. As the temperature continues to rise and reaches the deformation trigger threshold set by the shape memory alloy 9, the shape memory alloy 9 changes shape due to heat and pushes the pressing part 10 fixed to it forward. The pressing part 10 slides forward along the inside of the heat conduction shell 8 and presses the control switch 7. The control switch 7 has the ability to independently control the start and stop of the cooling fan 6, independent of the original electrical control circuit formed by the temperature sensor 3 and the controller. After the control switch 7 is pressed and turned on, it directly connects the power supply circuit of the cooling fan 6, forcibly starts the cooling fan 6, and continuously delivers airflow into the power distribution cabinet body 1 to expel the accumulated heat in time and prevent the power distribution cabinet body 1 from continuously overheating. Therefore, the conventional power distribution cabinet body 1 relies entirely on the temperature sensor 3 to drive the cooling fan 6. When the temperature sensor 3 is damaged, the heat dissipation system fails. This device retains the original electrical temperature control heat dissipation mode as the main heat dissipation method in daily use. When the temperature sensor 3 fails, the shape memory alloy 9 thermal deformation mechanism independently triggers the cooling fan 6 to start, effectively solving the problem of heat accumulation in the cabinet after the temperature sensor 3 fails and preventing the components from burning out at high temperatures.

[0025] like Figure 5 and Figure 8 As shown, the pressing component 10 includes a push plate 101 and a slide rod 102 fixed to one side of the push plate 101. The push plate 101 and the slide rod 102 are slidably connected to the heat-conducting shell 8. One end of the shape memory alloy 9 is fixedly connected to the push plate 101. A rubber column 103 is fixedly installed at one end of the slide rod 102. The rubber column 103 serves as the trigger end that directly contacts the control switch 7. It can effectively buffer the rigid impact force generated by the forward movement of the slide rod 102, avoid the hard impact of the slide rod 102 causing deformation and damage to the internal structure and contacts of the control switch 7, and effectively extend the service life of the control switch 7. Slider 104 is fixedly installed on both sides of the push plate 101, and the slider 104 is slidably connected to the heat-conducting shell 8. The slider 104 and the inner wall of the heat-conducting shell 8 form a precise sliding fit, so that the push plate 101 is guided by both sides during the sliding process inside the heat-conducting shell 8, which further improves the coaxiality and stability of the overall sliding of the push plate 101, effectively counteracts the lateral component force generated by the deformation thrust of the shape memory alloy 9, and avoids the push plate 101 tilting, deflecting and wearing on one side due to force. A limiting groove 81 is correspondingly provided inside the heat-conducting shell 8. The slider 104 is slidably connected to the limiting groove 81. The cooperation between the slider 104 and the limiting groove 81 effectively restricts the shaking and displacement of the push plate 101, and avoids problems such as skewness, deflection and jamming of the push plate 101 during the sliding process under force.

[0026] To address the technical challenges of accelerating component temperature rise under extreme operating conditions such as electrical control overheating failure in the main body of the distribution cabinet 1, cooling fan 6 malfunction and shutdown, and continuous high temperature accumulation in the main body of the distribution cabinet 1, the following preferred technical solutions are provided: like Figure 4 and Figure 6 As shown, a ventilation component 20 is provided on one side of the cabinet door 2 to improve ventilation. The ventilation component 20 is specially added at the cabinet door 2 position, which can form an auxiliary ventilation channel and improve the overall ventilation efficiency of the distribution cabinet body 1 under extreme working conditions such as the failure of the power distribution cabinet body 1's electrical control heat dissipation, the failure of the cooling fan 6 to stop, and the continuous accumulation of high temperature in the distribution cabinet body 1. The ventilation component 20 includes a frame plate 201 and several blades 202 rotatably connected inside the frame plate 201. Each blade 202 has a rotating plate 203 fixedly installed at both ends. A vertical plate 204 is rotatably connected to one side of the rotating plate 203, and a fixing plate 205 is fixedly installed on one side of the vertical plate 204. The frame plate 201 serves as the overall load-bearing base, providing a stable installation foundation for multiple sets of blades 202, ensuring that the blades 202 are arranged neatly and operate uniformly. Several blades 202 are independently rotatably assembled inside the frame plate 201, and can flexibly open and close at the required angle according to ventilation needs. When the blades 202 are fully open, they can maximize the open ventilation area, improve the efficiency of hot air exhaust from the cabinet, and enhance the heat convection and heat dissipation effect.

[0027] like Figure 2 and Figure 5 As shown, a snap-fit ​​component 30 is installed on one side of the cabinet door 2. The snap-fit ​​component 30 includes a connecting block 301 and a spring 302 correspondingly disposed inside the connecting block 301. The spring 302 and the arc-shaped block 303 can stably provide elastic extension and contraction driving force, realizing the automatic reset and elastic clamping function of the arc-shaped block 303. The connecting block 301 is fixedly connected to the cabinet door 2. The arc-shaped block 303 is correspondingly slidably connected inside the connecting block 301, and the spring 302 is fixedly connected to the arc-shaped block 303. The connecting block 301 serves as the overall load-bearing base and is firmly fixedly connected to the cabinet door 2. It can provide a stable installation and movement reference for the internal spring 302 and arc-shaped block 303, ensuring that the snap-fit ​​structure is firmly assembled and will not loosen or fall off. The connecting block 301 adopts an integrated block structure with high structural strength and good vibration resistance, which can adapt to the vibration conditions of the power distribution cabinet body 1 under long-term energized operation.

[0028] like Figure 2 and Figures 5-7As shown, a pusher 40 for adjusting the opening and closing degree of the blades 202 is slidably connected to one end of the heat-conducting shell 8. The pusher 40 includes a concave plate 401, which is slidably connected to the frame plate 201 and fixedly connected to the fixing plate 205. A guide plate 402 is fixedly installed on one side of the concave plate 401, and the guide plate 402 is slidably connected to the heat-conducting shell 8 and the connecting block 301 respectively. The guide plate 402 is in contact with the end of the shape memory alloy 9. Under normal operating conditions, the temperature sensor 3 inside the power distribution cabinet body 1 collects the temperature signal in real time and controls the temperature through the control... The controller drives the cooling fan 6 to operate for normal heat dissipation. When the temperature sensor 3 fails, the temperature inside the cabinet continues to rise and reaches the first-level deformation threshold of the shape memory alloy 9. The shape memory alloy 9 pushes the pressing part 10 to move, and the rubber column 103 at the end of the slide rod 102 presses the control switch 7 to try to start the cooling fan 6 for emergency forced heat dissipation. If the cooling fan 6 and the control switch 7 are working normally, the operation of the cooling fan 6 can effectively dissipate the heat of the cabinet, and the temperature inside the cabinet gradually drops. The shape memory alloy 9 will not undergo secondary deformation, and the blades 202 of the ventilation part 20 remain slightly open. If the internal temperature of the distribution cabinet body 1 continues to rise after the rubber column 103 presses the control switch 7, it is determined that the cooling fan 6 or the control switch 7 is faulty, the forced air cooling function is ineffective, the cabinet temperature continues to rise and reaches the secondary deformation threshold of the shape memory alloy 9, the shape memory alloy 9 further deforms and extends, the push guide plate 402 is displaced, the guide plate 402 slides directionally along the heat conduction shell 8 and the connecting block 301, and simultaneously drives the concave plate 401 to move. The concave plate 401 is fixedly connected to the fixed plate 205, and the fixed plate 205 is pulled to produce displacement. The fixed plate 205 drives each group of rotating plates 203 to rotate through the vertical plate 204, and finally drives all blades 202 to rotate to the maximum opening angle, opening the ventilation channel, relying on natural convection to form bottom ventilation and heat dissipation, continuously exhausting the hot air in the cabinet, slowing down the temperature rise rate in the cabinet, avoiding overheating and accelerated aging of components, preventing high temperature from causing a sharp increase in contact resistance, and avoiding local overheating and abnormal heating that would lead to additional power loss. After the guide plate 402 moves into place, the spring 302 pushes the arc block 303 to extend, which elastically engages and limits the guide plate 402, keeping the blade 202 in a fully open ventilation state and preventing small temperature fluctuations from causing the blade 202 to repeatedly open and close. After the maintenance personnel complete the fault repair, they can directly pull the guide plate 402 outward to overcome the clamping force of the arc block 303, release the engagement limit, and the entire mechanism can be reset, waiting for the next fault trigger. Therefore, the two-stage deformation characteristics of shape memory alloy 9 are used to achieve graded action: the first stage deformation prioritizes the activation of the cooling fan 6 for emergency air cooling. When the air cooling fails and the temperature continues to rise to the second stage threshold, the blades 202 are automatically opened to achieve natural ventilation as a backup, maximizing the ventilation cross-sectional area, slowing down the temperature rise of components, and buying time for emergency repairs. The guide plate 402 has arc grooves 403 on both sides that match the arc block 303. When the guide plate 402 slides to the maximum opening stroke position of the blade 202, the arc block 303 inside the connecting block 301 can be precisely inserted into the arc groove 403 to form a stable limiting self-locking structure, which locks the guide plate 402 in the working position, ensuring that the blade 202 continues to maintain the maximum opening ventilation state and will not retract or shift due to cabinet vibration, airflow disturbance, or slight retraction of the shape memory alloy 9, thus ensuring that the bottom ventilation and heat dissipation function remains effective under extreme high temperature failure.

[0029] like Figure 3 , Figure 7 and Figure 8 As shown, an alarm component 50 is installed on one side of the cabinet door 2. The alarm component 50 includes an alarm 501 and a stationary contact 502 fixedly installed inside the heat-conducting shell 8. By electrically connecting the stationary contact 502 to the inside of the power distribution cabinet body 1, the original internal power supply system of the power distribution cabinet body 1 can be used to provide working power to the alarm 501. A wire 503 is installed on one side of the stationary contact 502. The stationary contact 502 is made of high-temperature resistant material, which is suitable for the long-term high-temperature working conditions inside the heat-conducting shell 8. The wire 503 passes through and connects to the heat-conducting shell 8 and one side of the cabinet door 2, and the wire 503 is connected to the alarm 501. A sliding plate 601 is fixedly installed on one side of the push plate 101, and the sliding plate 601 is slidably connected to the heat-conducting shell 8. A moving contact 602 is fixedly installed on one side of the sliding plate 601. The moving contact 602 is made of high-temperature resistant material and can withstand the high temperature accumulation condition of the power distribution cabinet body 1 for a long time. The moving contact 602 is directly electrically connected to the inside of the power distribution cabinet body 1, and can directly use the original internal power supply system of the power distribution cabinet to power the alarm 501. When the temperature sensor 3 is damaged and fails after long-term use, it cannot detect the high temperature inside the cabinet, causing the electronic control heat dissipation system to fail to start the cooling fan 6, and heat continues to accumulate inside the cabinet. As the temperature continues to rise, when it reaches the first-level deformation threshold of the shape memory alloy 9, the shape memory alloy 9 pushes the push plate 101 to slide forward. The push plate 101 simultaneously drives the slide plate 601 and the moving contact 602 to move in the same direction, so that the moving contact 602 and the stationary contact 502 make precise contact. At this time, the moving contact 602 and the stationary contact 502 form a complete conductive circuit through the power supply circuit inside the power distribution cabinet body 1. The current is smoothly delivered to the alarm 501, which automatically triggers the audible and visual alarm, and provides real-time reminders to the on-site maintenance personnel that the power distribution cabinet temperature sensing and control system has failed and has entered the mechanical emergency heat dissipation protection state.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart grid distribution cabinet alarm device, comprising a distribution cabinet body (1) and a cabinet door (2) rotatably connected to one side of the distribution cabinet body (1), wherein a temperature sensor (3) is fixedly installed inside the distribution cabinet body (1), air outlet plates (4) are installed on both sides of the distribution cabinet body (1), a filter plate (5) is installed on one side of the cabinet door (2), and a cooling fan (6) is fixedly installed on one side of the filter plate (5), characterized in that: The cooling fan (6) is provided with a control switch (7) that can be independently controlled to start and stop. A heat-conducting shell (8) is fixedly installed on one side of the cabinet door (2). A shape memory alloy (9) is installed inside the heat-conducting shell (8). The heat-conducting shell (8) can effectively conduct the heat accumulated inside the power distribution cabinet body (1) and transfer the heat to the shape memory alloy (9). A pressing part (10) is slidably connected inside one end of the heat-conducting shell (8), and one end of the shape memory alloy (9) is fixedly connected to the pressing part (10). The heat inside the power distribution cabinet body (1) is continuously accumulated and transferred to the shape memory alloy (9) through the heat-conducting shell (8). When the temperature reaches the deformation trigger threshold of the shape memory alloy (9), the shape memory alloy (9) deforms and pushes the pressing part (10) to press the control switch (7). After the control switch (7) is turned on, the cooling fan (6) is started directly.

2. The smart grid distribution cabinet alarm device according to claim 1, characterized in that: The pressing component (10) includes a push plate (101) and a slide rod (102) fixed on one side of the push plate (101). The push plate (101) and the slide rod (102) are slidably connected to the heat-conducting shell (8) respectively. One end of the shape memory alloy (9) is fixedly connected to the push plate (101), and a rubber column (103) is fixedly installed on one end of the slide rod (102).

3. The smart grid distribution cabinet alarm device according to claim 2, characterized in that: The push plate (101) has sliders (104) fixedly installed on both sides, and the sliders (104) are slidably connected to the heat-conducting shell (8).

4. The smart grid distribution cabinet alarm device according to claim 1, characterized in that: The cabinet door (2) is provided with a ventilation component (20) on one side to improve ventilation. The ventilation component (20) includes a frame plate (201) and several blades (202) rotatably connected inside the frame plate (201). Each blade (202) has a rotating plate (203) fixedly installed at both ends. A vertical plate (204) is rotatably connected to one side of the rotating plate (203), and a fixing plate (205) is fixedly installed on one side of the vertical plate (204).

5. The smart grid distribution cabinet alarm device according to claim 4, characterized in that: A snap-fit ​​component (30) is installed on one side of the cabinet door (2). The snap-fit ​​component (30) includes a connecting block (301) and a spring (302) correspondingly disposed inside the connecting block (301). The connecting block (301) is fixedly connected to the cabinet door (2). A curved block (303) is correspondingly slidably connected inside the connecting block (301), and the spring (302) is fixedly connected to the curved block (303).

6. The smart grid distribution cabinet alarm device according to claim 5, characterized in that: One end of the heat-conducting shell (8) is slidably connected to a pusher (40) for adjusting the opening and closing degree of the blade (202). The pusher (40) includes a concave plate (401), which is slidably connected to the frame plate (201) and fixedly connected to the fixing plate (205). A guide plate (402) is fixedly installed on one side of the concave plate (401), and the guide plate (402) is slidably connected to the heat-conducting shell (8) and the connecting block (301) respectively. The guide plate (402) is in contact with the end of the shape memory alloy (9).

7. The smart grid distribution cabinet alarm device according to claim 6, characterized in that: The guide plate (402) has arc grooves (403) on both sides that match the arc block (303).

8. The smart grid distribution cabinet alarm device according to claim 1, characterized in that: An alarm device (50) is installed on one side of the cabinet door (2). The alarm device (50) includes an alarm (501) and a stationary contact (502) fixedly installed inside the heat-conducting shell (8). A wire (503) is installed on one side of the stationary contact (502), and the wire (503) passes through and connects to the heat-conducting shell (8) and the cabinet door (2) respectively. The wire (503) is connected to the alarm (501).

9. The smart grid distribution cabinet alarm device according to claim 3, characterized in that: A sliding plate (601) is fixedly installed on one side of the push plate (101), and the sliding plate (601) is slidably connected to the heat-conducting shell (8). A moving contact (602) is fixedly installed on one side of the sliding plate (601).

10. The smart grid distribution cabinet alarm device according to claim 3, characterized in that: The heat-conducting shell (8) has a corresponding limiting groove (81) inside, and the slider (104) is slidably connected to the limiting groove (81).

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