Power distribution cabinet with power-off protection device

Abstract

The invention relates to the technical field of power distribution cabinets, in particular to a power distribution cabinet with a power-off protection device, which comprises a power distribution cabinet, and is characterized in that the outer wall of the power distribution cabinet is rotatably connected with a cabinet door, a plurality of branch circuit breakers are fixedly mounted in the power distribution cabinet, and each branch circuit breaker is connected with a corresponding main circuit breaker through a circuit; the main circuit breakers are connected with strong current, the interior of the power distribution cabinet is also fixedly connected with two matching boxes, the bottom of each main circuit breaker is fixedly connected with the upper end of the matching box, the upper end of each matching box is also fixedly provided with a power-off mechanism which is powered by weak current, and the interior of each matching box is also fixedly provided with an alarm mechanism. According to the device, the characteristic that perfluoro-2-methyl-3-pentanone expands when heated is utilized, the three-in-one function of temperature detection, fire early warning and fire extinguishing is achieved, when a short-circuit fire breaks out in the power distribution cabinet and the temperature rises, a perfluoro-2-methyl-3-pentanone solution expands and gasifies when heated, and on one hand, a pressure valve is jacked open through gas flow to trigger a whistle to give an alarm.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution cabinets, in particular to a power distribution cabinet with a power failure protection device. Background Art

[0002] As the core hub for power distribution and control in power systems, distribution cabinets are widely used in various fields, including industrial production, commercial buildings, and residential life. As the demand for electricity continues to grow, the safe operation of distribution cabinets has become increasingly critical. However, problems such as aging electrical components, short circuits, and overloads are common within distribution cabinets, which can easily cause internal fires. Currently, there are significant deficiencies in the protective measures for distribution cabinets on the market. Most distribution cabinets use independent fire extinguishing devices or power-off protection, and the two cannot work together. Distribution cabinets equipped only with fire extinguishing devices cannot cut off the power supply in time when a fire occurs, and live firefighting can easily cause secondary accidents such as electric shock and leakage. Distribution cabinets equipped only with power-off protection cannot actively extinguish open flames after power is cut off, and the fire will continue to spread, making it difficult to effectively control the fire. The limitations of this traditional protection method make it difficult for distribution cabinets to quickly and efficiently ensure the safety of the power system when a fire occurs. Therefore, there is an urgent need for an innovative distribution cabinet power-off protection device that can automatically and synchronously extinguish the fire and cut off the power when the temperature inside the cabinet rises and a fire begins, eliminating fire hazards at the root and improving the safety and reliability of the power system.

[0003] A Chinese patent (publication number CN116598925A) discloses a leakage protection device for a distribution cabinet, which relates to the technical field of distribution cabinets, including a distribution cabinet body, a power-off device, and a heat dissipation device; wherein, a rain shield is fixedly installed on the top of the distribution cabinet body, a door panel is rotatably installed on the surface of the distribution cabinet body, a base is fixedly installed on the bottom of the distribution cabinet body, and a wiring port is fixedly installed on the right side of the distribution cabinet body; wherein, the power-off device includes a knife switch, a baffle, a push plate, an electric push rod, a detection device, a fixed plate, an inclined plate, a connecting rod and a terminal; the knife switch is fixedly installed inside the distribution cabinet body, and the push plate is slidably installed inside the distribution cabinet body. The invention has the characteristics of strong practicality and the connecting rod will drive the terminal to detach from the inside of the wiring port, so that the terminal is disconnected from the wiring port, thereby avoiding the situation where leakage still exists inside the distribution cabinet body after the knife switch is closed.

[0004] According to the above scheme, when the above scheme is used, it can only cut off the power to the switch in the distribution cabinet, and cannot achieve automatic shutdown through temperature, nor can it achieve the effect of fire extinguishing. In order to solve the problem that it cannot achieve automatic shutdown through temperature and cannot achieve fire extinguishing, we have proposed a distribution cabinet with a power-off protection device. Summary of the Invention

[0005] The object of the present invention is to provide a power distribution cabinet with a power failure protection device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A power distribution cabinet with a power-off protection device, comprising a power distribution cabinet, wherein a cabinet door is rotatably connected to the outer wall of the power distribution cabinet, and a plurality of sub-circuit breakers are fixedly installed inside the power distribution cabinet, each of the sub-circuit breakers is connected to a corresponding main circuit breaker via a line, and the main circuit breaker is connected to a strong current, and two matching boxes are fixedly connected inside the power distribution cabinet; The bottom of each main circuit breaker is fixedly connected to the upper end of the matching box. The upper end of each matching box is also fixedly installed with a power-off mechanism powered by weak current. The interior of each matching box is also fixedly installed with an alarm mechanism. When high temperature occurs inside the distribution cabinet or the main circuit breaker short-circuits and trips, the alarm mechanism will sound an alarm.

[0007] As a further feature of this solution, the power-off mechanism includes a switch arm, which is rotatably connected to the outer wall of the main circuit breaker via a rotating shaft. The end of the switch arm away from the main circuit breaker is rotatably connected to a mating arm with a reset function. The automatic reset function of the mating arm enables it to have strong environmental adaptability and self-recovery capabilities. During use, even if it is affected by external forces, shocks, vibrations and other factors and causes position displacement, the mating arm can automatically recover to its initial state without human intervention. This not only significantly improves the stability and reliability of the mating arm, but also avoids performance degradation or functional failure due to position changes.

[0008] As a further feature of this solution, the outer wall of the mating arm abuts against the inner wall of the mating box, and the end of the mating arm away from the switch arm is rotatably connected to a first movable plate. The outer wall of the first movable plate is slidably connected to the inner wall of the mating box, and the first movable plate can slide flexibly on the inner wall of the mating box, so that the device has a certain activity space and adjustability.

[0009] As a further feature of this solution, the inner wall of the matching box is also fixedly connected to a shock block, which is connected to the weak current line. The inner wall of the matching box is also fixedly connected to a first connecting plate. The shock block is made of copper and has multiple practical advantages. Copper has excellent electrical conductivity, which can ensure stable and efficient transmission of current, reduce power loss and contact resistance, and ensure smooth circuit operation. Its good corrosion resistance can resist the erosion of various chemical substances. It is not easy to rust or oxidize after long-term use in a complex electrical environment, and maintains good contact. The high temperature resistance enables the shock block to maintain stable physical and electrical properties under high load operation or sudden high temperature conditions, and is not easy to deform or damage.

[0010] As a further feature of this solution, the alarm mechanism includes a fixing frame, which is fixedly connected to the inner wall of the matching box. A coil is also fixedly connected to the inside of the fixing frame. The upper end of the fixing frame is connected to the first connecting plate through a copper wire, and the bottom of the fixing frame is also connected to the weak current through a line. When the coil is energized, based on the principle of electromagnetic induction, it can quickly and efficiently convert electrical energy into thermal energy to heat the metal parts without the need for complex heating equipment, simplifying the operation process and making it convenient and quick to use.

[0011] As a further feature of this solution, a liquid storage tube is fixedly connected to the bottom of the first connecting plate through a connecting arm. The liquid storage tube is located inside the coil. At the moment of power-on, the electromagnetic field generated by the coil can quickly convert electrical energy into thermal energy, which directly acts on the liquid storage tube. No additional preheating step is required, which greatly saves time and cost. The heating is accurate and efficient, and can quickly increase the temperature of the liquid in the liquid storage tube, meeting the demand for rapid heating of the liquid under emergency conditions.

[0012] As a further feature of this solution, the inner wall of the liquid storage tube is also slidably connected to a movable circular plate with a reset function, and the movable circular plate and the first movable plate are also fixedly connected by a pull rope, and the pull rope is slidably passed through the interior of the liquid storage tube and the first connecting plate. When the movable circular plate is displaced under the action of external force, it can be quickly started without manual intervention, so that the circular plate can quickly return to its initial position. This reset function not only significantly improves the convenience of using the equipment, but also avoids the time waste and operational inconvenience caused by manual reset.

[0013] As a further feature of this solution, the interior of the liquid storage tube is also filled with a perfluoro-methyl-pentanone solution, the bottom of the liquid storage tube is fixedly connected to a first connecting circular tube, the upper end of the liquid storage tube is fixedly connected to the first connecting circular tube, the bottom of the first connecting circular tube is fixedly connected to a second connecting circular tube through a pressure valve, and the outer wall of the second connecting circular tube is fixedly connected to multiple whistles. Once the alarm condition is triggered, multiple whistles can sound quickly and simultaneously to form a high-intensity, wide-coverage warning sound field. Compared with a single whistle, the simultaneous sounding of multiple whistles significantly improves the loudness and propagation range of the sound. Even in a noisy environment or a large space, the sound can be clearly audible, quickly attracting the attention of staff, thereby effectively avoiding information transmission delays caused by the alarm sound being too small or insufficient coverage.

[0014] As a further feature of this solution, two ventilation holes are provided on the outer wall of the power distribution cabinet, a connection box is fixedly connected to the outer wall of each ventilation hole, and a second connection plate is fixedly connected to the interior of the connection box.

[0015] As a further feature of this solution, the outer walls of the second connecting plates are each provided with a plurality of rectangular openings.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. When the present invention is used, the device utilizes the thermal expansion property of perfluoro-2-methyl-3-pentanone to achieve the three-in-one functions of temperature detection, fire warning and fire extinguishing. When the temperature rises due to a short circuit fire inside the distribution cabinet, the perfluoro-2-methyl-3-pentanone solution expands and vaporizes due to the heat. On the one hand, the gas flow pushes open the pressure valve, triggering a whistle to sound an alarm, promptly alerting personnel to the fire. On the other hand, perfluoro-2-methyl-3-pentanone itself is a highly effective fire extinguishing agent. Its vaporization process can absorb heat, and the released gas can quickly suppress the fire. It has the dual functions of early warning and fire extinguishing, effectively solving the problem that fires in distribution cabinets are difficult to detect and extinguish in a timely manner, and ensuring the safety of power equipment and personnel.

[0017] 2. When the present invention is used, on the one hand, when the main circuit breaker triggers the power-off protection, the alarm will be immediately activated and the fire-fighting operation will be launched. The power supply will be quickly cut off to eliminate the danger of live electricity, and the fire extinguishing agent will be released simultaneously to extinguish the fire source and prevent the fire from spreading. On the other hand, by utilizing the property of perfluoro-2-methyl-3-pentanone liquid expanding and vaporizing when heated, not only can the internal temperature of the distribution cabinet be monitored in real time, once the temperature rises abnormally, the gas generated by the vaporization of the liquid pushes the pressure valve and sounds an alarm by whistling. In addition, perfluoro-2-methyl-3-pentanone itself is a high-quality fire extinguishing agent. It absorbs a large amount of heat during the vaporization process, and the released gas can also effectively suppress the fire, realizing the integration of monitoring, alarming, and fire extinguishing, and comprehensively ensuring the safe and stable operation of the distribution cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a main view of a power distribution cabinet with a power-off protection device.

[0019] Figure 2 The figure is a schematic diagram of the internal structure of a power distribution cabinet with a power failure protection device.

[0020] Figure 3 This is a schematic diagram of the position structure of the main circuit breaker in a distribution cabinet with a power-off protection device.

[0021] Figure 4 This is a schematic diagram of the internal structure of a matching box in a distribution cabinet with a power-off protection device.

[0022] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0023] Figure 6 This is a schematic diagram of the internal structure of a liquid storage pipe in a distribution cabinet with a power-off protection device.

[0024] Figure 7 This is a schematic diagram of the position structure of the pull rope in a distribution cabinet with a power-off protection device.

[0025] Figure 8This is a schematic diagram of the position structure of the first connecting circular pipe in a distribution cabinet with a power-off protection device.

[0026] Figure 9 The figure is a schematic diagram of the internal structure of a connection box in a power distribution cabinet with a power failure protection device.

[0027] Figure 10 This is a schematic diagram of the position structure of the abutment plate in a distribution cabinet with a power-off protection device.

[0028] In the figure: 1. distribution cabinet; 2. cabinet door; 3. circuit breaker; 4. main circuit breaker; 5. connection box; 6. matching box; 7. switch arm; 8. matching arm; 9. rubber sheet; 11. first movable plate; 12. pull rope; 13. first connecting plate; 14. electric shock block; 15. slide bar; 16. connecting pipe; 17. liquid storage pipe; 18. movable circular plate; 19. reset spring; 20. first connecting circular pipe; 21. second connecting circular pipe; 22. whistle; 23. coil; 24. fixing frame; 25. abutment arm; 26. pressure valve; 27. movable box; 28. rectangular opening; 29. connecting rod; 31. second connecting plate; 32. abutment plate; 33. elastic telescopic rod; 34. second movable plate; 101. power-off mechanism; 201. alarm mechanism. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figures 1 to 3 As shown, in an embodiment of the present invention, a power distribution cabinet with a power-off protection device includes a power distribution cabinet 1, the outer wall of the power distribution cabinet 1 is rotatably connected to a cabinet door 2 via a rotating shaft, and the outer wall of the cabinet door 2 is also fixedly installed with a rubber ring, which can enhance the sealing between the cabinet door 2 and the power distribution cabinet 1, and a plurality of sub-circuit breakers 3 are fixedly installed inside the power distribution cabinet 1, each sub-circuit breaker 3 is connected to the corresponding main circuit breaker 4 through a line, and the main circuit breaker 4 is connected to the strong current, and the interior of the power distribution cabinet 1 is also fixedly connected to two matching boxes 6 by bolts, and the two matching boxes 6 are symmetrically distributed on the left and right sides of the inner wall of the power distribution cabinet 1, the bottom of each main circuit breaker 4 is fixedly connected to the upper end of the matching box 6, and the upper end of each matching box 6 is also fixedly installed with a power-off mechanism 101 powered by weak current, and the interior of each matching box 6 is also fixedly installed with an alarm mechanism 201, when high temperature occurs inside the power distribution cabinet 1 or the main circuit breaker 4 short-circuit trips, the alarm mechanism 201 will sound an alarm; Example 2: Please refer to Figures 3 to 5 、 Figure 7 As shown, the power-off mechanism 101 includes a switch arm 7, which is rotatably connected to the outer wall of the main circuit breaker 4 via a rotating shaft. The main circuit breaker 4 and the switch arm 7 are conventional and will not be described in detail here. The end of the switch arm 7 away from the main circuit breaker 4 is rotatably connected to a mating arm 8 with a reset function via a rotating shaft. A reset torsion spring is clamped between the mating arm 8 and the switch arm 7. The outer wall of the mating arm 8 abuts the inner wall of the mating box 6. The end of the mating arm 8 away from the switch arm 7 is rotatably connected to a first movable plate 11. The cross-section of the first movable plate 11 is "L"-shaped. The outer wall of the first movable plate 11 is slidably connected to the inner wall of the matching box 6. Specifically, the inner wall of the matching box 6 is fixedly connected with two slide bars 15, and the two slide bars 15 are symmetrically distributed on the inner wall of the matching box 6. The first movable plate 11 is slidably connected to the outer wall of the two slide bars 15, and the slide bar 15 can limit the sliding of the first movable plate 11. The inner wall of the matching box 6 is also fixedly connected with an electric shock block 14, which is connected to the weak current line. The electric shock block 14 is located directly below the first movable plate 11. The inner wall of the matching box 6 is also fixedly connected with a first connecting plate 13, which is located below the electric shock block 14. The first movable plate 11, the electric shock block 14 and the first connecting plate 13 are all made of copper. The copper material has good corrosion resistance and high temperature resistance and is durable. See also Figures 5 to 8As shown, the alarm mechanism 201 includes a fixing frame 24, which is fixedly connected to the inner wall of the matching box 6 by bolts. The interior of the fixing frame 24 is also fixedly connected to a coil 23, which is "spiral-shaped" and also made of copper. The upper end of the fixing frame 24 is connected to the first connecting plate 13 by a copper wire, which is not shown in the figure. The bottom of the fixing frame 24 is also connected to the weak current through a line. Specifically, when the first movable plate 11 is in contact with the outer wall of the electric shock block 14 and the upper end of the first connecting plate 13 at the same time, the weak current current It will pass through the electric shock block 14, the first connecting plate 13, and the coil 23 and then return to the weak current circuit to form a loop, so that the coil 23 is energized. The bottom of the first connecting plate 13 is also fixedly connected to a liquid storage tube 17 through a connecting arm. The connecting arm is not shown in the figure. The outer wall of the liquid storage tube 17 is provided with a liquid injection port, and the outer wall of the liquid injection port is threadedly connected to a mounting cover. The liquid storage tube 17 is located inside the coil 23, and there is a gap between the outer wall of the liquid storage tube 17 and the inner wall of the coil 23, which are in a non-contact state. The connecting arm is made of ceramic material and has insulation properties. The inner wall of the liquid storage tube 17 is also slidably connected to a movable circular plate 18 with a reset function. The bottom of the movable circular plate 18 is fixedly connected to the bottom end of the inner wall of the liquid storage tube 17 by a reset spring 19. The reset spring 19 is made of nickel-based alloy and can withstand high temperatures of about 800 to 1,000 degrees Celsius. When the reset spring 19 is heated, it will not easily deform or lose its elasticity. The movable circular plate 18 and the first movable plate 11 are also fixedly connected by a pull rope 12. The pull rope 12 is slidably passed through the interior of the liquid storage tube 17 and the first connecting plate 13. The liquid storage tube The interior of 17 is also filled with a perfluoro-2-methyl-3-pentanone solution. The perfluoro-2-methyl-3-pentanone solution is a liquid at room temperature with a boiling point of 76 degrees Celsius. When the temperature rises above 100 degrees Celsius, it will quickly vaporize into a gas. In this process, as the liquid turns into a gas, the molecular distance increases and the volume expands. The vaporization process absorbs a large amount of heat, which can cool the interior of the distribution cabinet 1 and extinguish fires, playing a flame retardant role. The perfluoro-2-methyl-3-pentanone solution is located at the upper end of the movable circular plate 18; The bottom of the liquid storage tube 17 is fixedly connected to the first connecting circular tube 20, and the upper end of the liquid storage tube 17 is fixedly connected to the first connecting circular tube 20 through multiple connecting tubes 16. The multiple connecting tubes 16 are distributed circumferentially between the liquid storage tube 17 and the first connecting circular tube 20. The outer wall of the liquid storage tube 17 and the internal connecting parts are all made of metal, such as Figure 6 As shown, the bottom of the first connecting circular tube 20 is fixedly connected to the second connecting circular tube 21 through a pressure valve 26. The pressure coefficient of the pressure valve 26 is greater than the elastic coefficient of the return spring 19. The outer wall of the second connecting circular tube 21 is fixedly connected to multiple whistles 22. The multiple whistles 22 are distributed circumferentially on the outer wall of the second connecting circular tube 21. See also Figures 2 and 3 、 Figures 9 and 10As shown, there are two ventilation holes on the outer wall of the power distribution cabinet 1. The two ventilation holes are located at the right end of the power distribution cabinet 1 and are symmetrically distributed up and down. Figure 2 , each vent outer wall is fixedly connected to a connection box 5, the interior of the connection box 5 is fixedly connected to a second connection plate 31, the upper end of the connection box 5 is slidably connected to the mobile box 27, the interior of the mobile box 27 is fixedly connected to an elastic telescopic rod 33, the upper end of the elastic telescopic rod 33 is fixedly connected to an abutment plate 32, the bottom of the abutment plate 32 abuts against the upper end of the mobile box 27, the bottom of the mobile box 27 is fixedly connected to a second mobile plate 34, and a rubber sheet 9 is fixedly connected between the upper end of the second mobile plate 34 and the top of the inner wall of the connection box 5. The outer wall of the movable plate 34 abuts against the outer wall of the second connecting plate 31. The outer walls of the second connecting plate 31 and the second movable plate 34 are each provided with a plurality of rectangular openings 28. The plurality of rectangular openings 28 are arranged in an array from top to bottom on the outer walls of the second movable plate 34 and the second connecting plate 31. Every two corresponding rectangular openings 28 abut against and communicate with each other. The two movable boxes 27 are fixedly connected by a connecting rod 29. The end of each first movable plate 11 away from the matching box 6 is fixedly connected to an abutting arm 25. The abutting arm 25 is located at the upper end of the connecting rod 29. Specifically, when any main circuit breaker 4 is powered off, the switch arm 7 will rotate downward, and the switch arm 7 will drive the first movable plate 11 to move downward in the inner wall of the matching box 6 through the matching arm 8, or the internal temperature of the distribution cabinet 1 is too high, and the perfluoro-2-methyl-3-pentanone solution inside the liquid storage tube 17 is vaporized and expanded. At this time, the movable circular plate 18 moves downward to compress the reset spring 19, and the reset spring 19 will pull the first movable plate 11 downward through the pull rope 12. In summary, the first movable plate 11 drives the connecting rod 29 to move downward through the abutting arm 25, and the connecting rod 29 will drive all the movable boxes 27 to move downward. When the movable box 27 stops moving, the rectangular opening 28 between the second movable plate 34 and the second connecting plate 31 is in a disconnected state, and the second movable plate 34 will also pull the rubber sheet 9 when it moves downward, and the rubber sheet 9 will not be connected to the second movable plate 3 4 is abutted to block the rectangular opening 28. At this time, the rectangular opening 28 on the outer wall of the second connecting plate 31 is blocked, and the coil 23 heats the liquid storage tube 17 and the perfluoro-2-methyl-3-pentanone solution inside. The perfluoro-2-methyl-3-pentanone solution expands into gas when heated, enters the interior of the first connecting circular tube 20 through the connecting tube 16, pushes the pressure valve 26 open, enters the second connecting circular tube 21, and is discharged from the whistle 22 to sound an alarm. At this time, the interior of the distribution cabinet 1 is in a closed state, and the discharged perfluoro-2-methyl-3-pentanone gas fills the interior of the distribution cabinet 1. When the internal air pressure of the distribution cabinet 1 is too high, the abutting plate 32 is pushed upward to squeeze out excess air. The exhaust is continuous, so that the interior of the distribution cabinet 1 is filled with perfluoro-2-methyl-3-pentanone gas, achieving the effect of oxygen barrier and flame retardant against the flame inside the distribution cabinet 1.

[0031] The working principle of the present invention is: When the present invention is used, when any of the main circuit breakers 4 is powered off, the switch arm 7 will rotate downward, and the switch arm 7 will drive the first movable plate 11 to move downward in the inner wall of the matching box 6 through the matching arm 8. Or, the internal temperature of the power distribution cabinet 1 is too high, and the perfluoro-2-methyl-3-pentanone solution in the liquid storage tube 17 is vaporized and expanded. Since the pressure coefficient of the pressure valve 26 is greater than the elastic coefficient of the reset spring 19, the movable circular plate 18 moves downward to compress the reset spring 19 first, and the reset spring 19 will compress the first movable plate 11 through the pull rope 12. The movable plate 11 is pulled downward. In summary, when the first movable plate 11 moves downward, it will abut against the outer wall of the electric shock block 14 and the first connecting plate 13. When the first movable plate 11 abuts against the outer wall of the electric shock block 14 and the upper end of the first connecting plate 13 at the same time, the weak current will pass through the electric shock block 14, the first connecting plate 13, and the coil 23 and then return to the weak current circuit, forming a loop, so that the coil 23 is energized. When the coil 23 is energized, an alternating magnetic field will be generated, and the metal electric shock block 14 will be heated. At this time, the coil 23 will heat the liquid storage tube 17 and the perfluoro-2-methyl-3-pentanone solution inside. In another case, when a short circuit occurs inside the distribution cabinet 1 and a fire occurs, the internal temperature of the distribution cabinet 1 rises, and the perfluoro-2-methyl-3-pentanone solution expands, which can also have the effect of detecting the internal temperature of the distribution cabinet 1. The perfluoro-2-methyl-3-pentanone solution expands into gas when heated, enters the first connecting circular tube 20 through the connecting tube 16, and then pushes the pressure valve 26 to enter the second connecting circular tube 21, and is then discharged from the whistle 22 to sound an alarm. When the gas fills the interior of the distribution cabinet 1, the perfluoro-2-methyl-3-pentanone gas has a flame retardant effect, so that the flame inside the distribution cabinet 1 is extinguished, and an alarm can be sounded to inform the staff of the short circuit. It also has a flame retardant effect on the interior of the distribution cabinet 1. When the flame is extinguished, the internal temperature of the distribution cabinet 1 gradually decreases. If the perfluoro-2-methyl-3-pentanone solution in the electric shock block 14 has not been completely discharged, the perfluoro-2-methyl-3-pentanone solution is injected into the electric shock block 14 through the liquid injection port. If the switch arm 7 is tripped at this time, the switch arm 7 is pushed upward to move. The switch arm 7 drives the first movable plate 11 to reset through the cooperating arm 8. The first movable plate 11 will be separated from the contact with the outer wall of the electric shock block 14 and the first connecting plate 13, and can be used next time.

[0032] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A power distribution cabinet with a power failure protection device, comprising a power distribution cabinet (1), characterized in that: The outer wall of the power distribution cabinet (1) is rotatably connected to a cabinet door (2), and a plurality of sub-circuit breakers (3) are fixedly installed inside the power distribution cabinet (1), each of the sub-circuit breakers (3) is connected to a corresponding main circuit breaker (4) through a line, and the main circuit breaker (4) is connected to a strong current. Two matching boxes (6) are also fixedly connected inside the power distribution cabinet (1); The bottom of each main circuit breaker (4) is fixedly connected to the upper end of the matching box (6), and the upper end of each matching box (6) is also fixedly installed with a power-off mechanism (101) powered by weak current. The interior of each matching box (6) is also fixedly installed with an alarm mechanism (201). When high temperature occurs inside the distribution cabinet (1) or the main circuit breaker (4) short-circuits and trips, the alarm mechanism (201) will sound an alarm.

2. A power distribution cabinet with a power failure protection device according to claim 1, characterized in that: The power-off mechanism (101) comprises a switch arm (7), wherein the switch arm (7) is rotatably connected to the outer wall of the main circuit breaker (4) via a rotating shaft, and an end of the switch arm (7) away from the main circuit breaker (4) is rotatably connected to a matching arm (8) having a reset function.

3. The power distribution cabinet with a power failure protection device according to claim 2, characterized in that: The outer wall of the mating arm (8) abuts against the inner wall of the mating box (6); one end of the mating arm (8) away from the switch arm (7) is rotatably connected to a first movable plate (11); the outer wall of the first movable plate (11) is slidably connected to the inner wall of the mating box (6).

4. A power distribution cabinet with a power failure protection device according to claim 3, characterized in that: The inner wall of the matching box (6) is also fixedly connected to a shock block (14), and the shock block (14) is connected to a weak current line. The inner wall of the matching box (6) is also fixedly connected to a first connecting plate (13).

5. The power distribution cabinet with a power failure protection device according to claim 1, characterized in that: The alarm mechanism (201) includes a fixing frame (24), the fixing frame (24) is fixedly connected to the inner wall of the matching box (6), the interior of the fixing frame (24) is also fixedly connected to a coil (23), the upper end of the fixing frame (24) is connected to the first connecting plate (13) through a copper wire, and the bottom of the fixing frame (24) is also connected to the weak current through a line.

6. The power distribution cabinet with a power failure protection device according to claim 5, characterized in that: The bottom of the first connecting plate (13) is also fixedly connected to a liquid storage tube (17) via a connecting arm, and the liquid storage tube (17) is located inside the coil (23).

7. The power distribution cabinet with a power failure protection device according to claim 6, characterized in that: The inner wall of the liquid storage tube (17) is also slidably connected to a movable circular plate (18) having a reset function. The movable circular plate (18) and the first movable plate (11) are also fixedly connected via a pull rope (12). The pull rope (12) is slidably arranged inside the liquid storage tube (17) and the first connecting plate (13).

8. The power distribution cabinet with a power failure protection device according to claim 7, characterized in that: The interior of the liquid storage tube (17) is also filled with a perfluoro-2-methyl-3-pentanone solution. The bottom of the liquid storage tube (17) is fixedly connected to a first connecting circular tube (20). The upper end of the liquid storage tube (17) is fixedly connected to the first connecting circular tube (20). The bottom of the first connecting circular tube (20) is fixedly connected to a second connecting circular tube (21) via a pressure valve (26). The outer wall of the second connecting circular tube (21) is fixedly connected to a plurality of whistles (22).

9. The power distribution cabinet with a power failure protection device according to claim 1, characterized in that: Two ventilation holes are provided on the outer wall of the power distribution cabinet (1), and a connection box (5) is fixedly connected to the outer wall of each ventilation hole. A second connection plate (31) is fixedly connected to the interior of the connection box (5).

10. A power distribution cabinet with a power failure protection device according to claim 9, characterized in that: The outer wall of the second connecting plate (31) is provided with a plurality of rectangular openings (28).

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