Direct-current power supply cabinet with leakage protection

Abstract

The invention discloses a direct current power supply cabinet with leakage protection, and belongs to the technical field of direct current power supply cabinets, the direct current power supply cabinet comprises a direct current power supply cabinet body and a leakage switch unit installed in the direct current power supply cabinet body, and the leakage switch unit comprises a leakage switch, a heat dissipation fan and a heat driving structure arranged at the top of the leakage switch. Heat energy generated during operation of the electric leakage switch unit not only can be dissipated passively in an air convection mode, but also can be absorbed actively by a heat dissipation structure installed at the top of the electric leakage protection unit during operation of the electric leakage protection unit. The internal temperature and the external temperature of the leakage protection unit can be sensed, so that when the internal temperature of the direct-current power supply cabinet body is not lower than the surface temperature of the leakage protection unit and the heat dissipation of the heat dissipation structure fails, forced cooling and heat dissipation processing can be performed on the leakage switch unit; and the overheating condition in the process of carrying out leakage protection on the direct-current power supply cabinet body is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of direct current power supply cabinets, and more specifically, to a direct current power supply cabinet with leakage protection. Background Art

[0002] DC power supply cabinet is mainly used to provide DC power for power system, including control load, power load and DC emergency lighting load. It is the basis of control and protection of modern power system and is widely used in power plants and substations.

[0003] If a DC power cabinet leaks electricity, it may cause voltage instability and damage the electrical equipment in the cabinet. The leakage protection switch installed in the DC power cabinet can effectively detect the leakage current in the circuit in the DC power cabinet and quickly cut off the power supply when the current exceeds the set value, thereby effectively protecting the normal operation of the DC power cabinet.

[0004] Since the leakage protection switch installed in the DC power supply cabinet operates in a relatively closed space, and in the DC power supply system, the leakage protection switch needs to monitor the current changes at all times, when the leakage protection switch is in a high-load operation state, more heat will be generated inside it. Since the existing leakage protection switch dissipates heat by mostly using air convection to continuously take away the heat energy on the surface of the leakage protection switch to achieve heat exchange, thereby passively achieving the purpose of heat dissipation of the leakage protection switch, the heat dissipation performance of the leakage protection switch is poor, making it difficult for the heat inside the leakage protection switch to dissipate in time, which can easily cause the leakage protection switch to be damaged due to overheating or even cause safety accidents such as fire, thereby posing a threat to the safety and reliability of the entire DC power supply cabinet.

[0005] In view of this, we propose a DC power supply cabinet with leakage protection. Summary of the invention

[0006] Technical problem to be solved: The purpose of this application is to provide a DC power supply cabinet with leakage protection, which solves the technical problems raised in the above-mentioned background technology.

[0007] Technical solution: The technical solution of the present application provides a DC power supply cabinet with leakage protection, including a DC power supply cabinet body and a leakage switch unit installed inside the DC power supply cabinet body, the leakage switch unit includes a leakage switch, a heat dissipation fan and a heat drive structure arranged on the top of the leakage switch; The heat-driving structure includes a heat-introducing tube seat connected to the top of the leakage switch, and a heat-dissipating structure is arranged on the heat-introducing tube seat, and the heat-dissipating structure includes a top cover which is sealed and connected to the opening at the top of the heat-introducing tube seat, and a heat-conducting outer frame is arranged inside the heat-introducing tube seat, and an annular heat-conducting silicone pad is sleeved on the outer periphery of the heat-conducting outer frame, and the outer ring wall of the annular heat-conducting silicone pad is in contact with the side wall of the inner cavity of the heat-introducing tube seat, and a heat transfer net is connected to the inner cavity of the heat-conducting outer frame, and a plurality of through holes arranged in an annular array are evenly opened on the heat transfer net, and a heat transfer rod is inserted into each through hole, and a heat-insulating support rod is connected to the side wall of the heat transfer rod corresponding to the position of the through hole, and a water-absorbing sheet which absorbs water inside is connected to the heat transfer net, and the water-absorbing sheet is located inside the annular array surrounded by the plurality of through holes; The bottoms of the plurality of heat transfer rods are commonly connected to a strong cooling structure, and the tops of the plurality of heat transfer rods are commonly connected to the bottom of the top cover.

[0008] As an optional solution of the technical solution of the present application document, one end of the heat-insulating support rod away from the heat transfer rod is connected to the side wall of the through hole.

[0009] As an optional solution of the technical solution of the present application document, the strong cooling structure includes a heat-conducting box body arranged below the plurality of heat transfer rods, the top end of the heat-conducting box body is sealed and connected with a heat-conducting box cover, and the bottom ends of the plurality of heat transfer rods are commonly connected to the top of the heat-conducting box cover, and the bottom end of the heat-conducting box body is connected with a heat-conducting silicone sheet; The heat-conducting box body is provided with a fixed ring seat and a heat-insulating bottom cylinder which are arranged in an upper and lower interval, and the heat-insulating bottom cylinder is sealingly and slidably connected to the inner cavity of the heat-conducting box body, the fixed ring seat is fixedly connected to the inner cavity of the heat-conducting box body, and a barrier film is connected to the inner cavity of the fixed ring seat; An annular elastic enclosure sheet is connected between the fixed ring seat and the heat-insulating bottom tube, and the space surrounded by the fixed ring seat, the barrier film, the annular elastic enclosure sheet, and the heat-insulating bottom tube is filled with a liquid medium portion, and a plurality of forced pricking needles are evenly connected to the top of the heat-insulating bottom tube below the barrier film; A circle of clearance groove is provided on the side wall of the inner cavity of the heat conduction box at a position corresponding to the position of the annular elastic enclosure piece; A metal heat-conducting piston is sealed and slidably connected in the inner cavity of the heat-insulating bottom cylinder, and a heat-sensitive expansion layer located above the metal heat-conducting piston is also filled in the inner cavity of the heat-insulating bottom cylinder. A piston heat-conducting column is connected to the bottom of the metal heat-conducting piston, and the bottom end of the piston heat-conducting column seals through the bottom of the heat-insulating bottom cylinder and is connected to the bottom wall of the inner cavity of the heat-conducting box body. A plurality of first springs connected between the metal heat-conducting piston and the bottom wall of the inner cavity of the heat-insulating bottom cylinder are evenly arranged in the inner cavity of the heat-insulating bottom cylinder; An upper switch terminal is connected to the bottom of the metal heat-conducting piston, and a lower switch terminal connected to the bottom wall of the inner cavity of the heat-insulating bottom cylinder is provided below the upper switch terminal; Opposite speed-up parts are arranged above the fixed ring seat.

[0010] As an optional solution of the technical solution of the present application document, the opposite speed-up member includes a hollow heat transfer plate and a control unit, a plurality of second springs are evenly connected to the top of the hollow heat transfer plate, and the top of the second spring is connected to the bottom surface of the heat introduction box cover; A limited position slide seat is slidably connected in the inner cavity of the hollow heat transfer plate, a reaction bottom block is connected at the bottom of the hollow heat transfer plate, and pulling rods are connected at both the left and right sides of the reaction bottom block; An airtight cylinder is provided below the reaction bottom block at positions corresponding to the two pulling rods, the top of the airtight cylinder is fixedly connected with a guide hose, a synchronous plug seat is sealingly and slidably connected inside the airtight cylinder, and the bottom end of the pulling rod seals through the top of the corresponding airtight cylinder and is connected with the synchronous plug seat; The top end of the pulling rod passes through the bottom of the hollow heat transfer plate and is connected to the bottom of the limiting sliding seat; A pressure relief air passage is also arranged in the airtight cylinder, and one end of the pressure relief air passage is connected with the bottom end of the inner cavity of the airtight cylinder, and the other end thereof penetrates through the side wall of the airtight cylinder.

[0011] As an optional solution of the technical solution of this application document, one end of the conveying hose away from the airtight cylinder penetrates into the interior of the heat-conducting box body and then extends into the inner cavity of the heat-conducting box body and is fixedly connected to the bottom of the insulating bottom cylinder.

[0012] As an optional solution of the technical solution of this application document, the bottom end of the airtight cylinder is fixedly connected to the top of the fixed ring seat, and the two airtight cylinders are respectively located on the left and right sides of the barrier film.

[0013] As an optional solution of the technical solution of the present application document, the control unit includes a control circuit board and two triggering terminals arranged opposite to each other in an upper and lower direction, and the control circuit board is respectively connected to a wireless signal transmitter and a single-chip microcomputer.

[0014] As an optional solution of the technical solution of this application document, one of the triggering terminals is connected to the limit slide, and the other triggering terminal is connected to the control circuit board; The control circuit board is connected to the bottom wall of the inner cavity of the hollow heat transfer plate.

[0015] As an optional solution to the technical solution of this application document, the upper switch terminal and the lower switch terminal are both connected to the cooling fan wires, and when the lower switch terminal contacts the upper switch terminal, the cooling fan is triggered to turn on.

[0016] As an optional solution of the technical solution of this application document, when the two triggering terminals are in contact, the single-chip microcomputer is triggered to control the wireless signal transmitter to turn on.

[0017] Beneficial effects: One or more technical solutions provided in the technical solution of the present application have at least the following technical effects or advantages: 1. In the process of the DC power supply cabinet realizing leakage protection through the leakage switch unit installed inside it, the heat energy generated by the leakage switch unit during operation can not only be passively dissipated through air convection, but also can be actively absorbed by the heat drive structure installed on the top of the leakage protection unit. The heat energy generated during the operation of the leakage protection unit can be sensed by the internal and external temperatures of the leakage protection unit, so that when the internal temperature of the DC power supply cabinet is not lower than the surface temperature of the leakage protection unit and the heat dissipation of the heat drive structure fails, the leakage switch unit can be forced to cool down and dissipate heat, thereby avoiding overheating in the process of leakage protection of the DC power supply cabinet, thereby ensuring the safety and reliability of the operation of the entire DC power supply cabinet.

[0018] 2. Installing the heat-dissipating structure on the top of the leakage switch can avoid the situation where other electrical appliances installed on the side of the leakage switch unit block the heat dissipation performance.

[0019] 3. When the leakage switch is in operation, the heat energy inside it can not only be dissipated to the inside of the DC power cabinet through the heat tube seat, but also continuously transferred to the annular thermal conductive silicone pad through the heat tube seat. The heat energy is then transferred to the water-absorbing sheet inside by the heat transfer network. The water in the water-absorbing sheet absorbs heat and evaporates, and after contacting the top cover with a lower temperature, it condenses into water droplets and drips onto the water-absorbing sheet again and is absorbed by the water-absorbing sheet, thereby realizing active circulation cooling treatment of the leakage switch during operation.

[0020] 4. When the internal temperature of the DC power supply cabinet is not lower than the surface temperature of the leakage protection unit, the water absorbed in the water-absorbing sheet evaporates due to heat and is difficult to condense and liquefy when it encounters the top cover with a higher temperature, causing the temperature of the heat-driving structure to gradually rise. The heat energy is continuously transferred to the heat-sensitive shrinkage layer through the heat-conducting silicone sheet, the heat-conducting box, the piston heat-conducting column and the metal heat-conducting piston. When the temperature of the heat-driving structure rises to the preset critical value (that is, the phase change temperature of the heat-sensitive shrinkage layer), the heat-sensitive shrinkage layer expands in volume due to heat and drives the heat-insulating bottom cylinder to move upward. The upward heat-insulating bottom cylinder drives the forced puncture needle to puncture the barrier film and then continuously pushes the liquid medium part to the reverse direction. At the bottom block, when the reaction bottom block contacts the liquid medium, an endothermic reaction occurs, forcing the hollow heat transfer plate to cool down. Subsequently, the heat at the top cover is continuously transferred to the low-temperature hollow heat transfer plate via the heat transfer rod, the heat guide box cover and the second spring. After the top cover cools down, the water vapor contacts the cooled top cover and is liquefied by the cold again and drips back to the water absorbing sheet. When the temperature inside the DC power supply cabinet is not lower than the surface temperature of the leakage protection unit and causes the heat dissipation failure of the heat drive structure, the leakage switch unit can be forced to cool down and dissipate heat, so that the heat drive structure can resume the active circulation cooling treatment of the heat energy generated by the operation of the leakage switch.

[0021] 5. When the temperature of the heat-driving structure rises to a preset critical value, the heat-sensitive shrinkage layer expands in volume due to the heat and drives the heat-insulating bottom tube to move upward. During this process, the metal heat-conducting piston continuously squeezes air into the inner cavity of the airtight cylinder through the conveying hose. After the air pressure in the inner cavity of the airtight cylinder increases, the reaction bottom block is moved toward the fixed ring seat through the synchronous plug seat. As a result, when the heat-insulating bottom tube drives the forced puncture needle to pierce the barrier film and push the liquid medium part toward the reaction bottom block, the movement of the liquid medium part to the reaction bottom block is shortened and the liquid medium part quickly contacts the reaction bottom block, so that the heat-driving structure can quickly restore the active circulation cooling function and cool down the leakage switch in operation, thereby shortening the duration of poor heat dissipation of the leakage switch due to heat dissipation failure of the heat-driving structure.

[0022] 6. After the leakage switch unit has been subjected to forced cooling and heat dissipation treatment, the temperature inside the leakage switch in the leakage switch unit still rises further, causing the volume of the heat-sensitive shrinkage layer in the heat-driving structure to further expand and drive the lower switch terminal to contact the upper switch terminal, triggering the cooling fan to turn on. The turned-on cooling fan then accelerates the air flow rate at the leakage switch unit, causing the ambient temperature around the leakage switch unit to drop rapidly and achieving the purpose of assisting the forced cooling structure to cool the leakage switch, thereby effectively preventing the leakage switch unit from overheating.

[0023] 7. After the reaction bottom block contacts with the liquid medium and reacts and gradually dissolves, when the reaction bottom block is completely dissolved, the binding force on the pulling rod disappears, and then the hollow heat transfer plate drives the triggering terminal at the bottom to contact the triggering terminal at the top under the elastic pulling force of the stretched second spring and triggers the single chip microcomputer to control the wireless signal transmitter to turn on. The wireless signal transmitter then sends a reminder signal to the external main controller to remind relevant staff to replace the heat dissipation structure in the heat-inducing cylinder seat in time. When replacing, remove the top cover covering the top of the heat-inducing cylinder seat, then remove the old heat dissipation structure from the heat-inducing cylinder seat as a whole, and finally reinstall the new heat dissipation structure on the heat-inducing cylinder seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of this application.

[0025] Figure 2 This is a schematic diagram of the heat drive structure in this application.

[0026] Figure 3 It is a partially enlarged schematic diagram of the heat drive structure in this application.

[0027] Figure 4 For this application Figure 3 A partial enlarged schematic diagram of part B.

[0028] Figure 5For this application Figure 2 A partial enlarged schematic diagram of part A.

[0029] Explanation of reference numerals in the figure: 100, DC power supply cabinet; 201, leakage switch; 202, heat pipe seat; 203, heat dissipation fan; 204, heat conduction frame; 205, annular heat conduction silicone pad; 206, heat transfer net; 208, water-absorbing sheet; 209, heat transfer rod; 210, heat conduction box; 211, heat conduction silicone sheet; 212, piston heat conduction column; 213, heat insulation bottom cylinder; 214, metal heat conduction piston; 215, liquid medium part; 216, forced pricking needle; 217, Fixed ring seat; 218, barrier film; 219, annular elastic enclosure sheet; 220, upper switch terminal; 221, lower switch terminal; 222, guide hose; 223, reaction bottom block; 224, limit slide seat; 225, hollow heat transfer plate; 226, airtight cylinder; 227, synchronous plug seat; 228, pulling rod; 230, heat insulation support rod; 231, trigger terminal; 232, heat-sensitive shrinkage layer; 233, wireless signal transmitter; 234, single-chip microcomputer; 235, heat-inducing box cover. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] Reference Figures 1 to 3 The embodiment of the present application provides a DC power supply cabinet with leakage protection, including a DC power supply cabinet body 100 and a leakage switch unit installed inside the DC power supply cabinet body 100, the leakage switch unit includes a leakage switch 201, a heat dissipation fan 203 and a heat drive structure arranged on the top of the leakage switch 201, and the heat drive structure is installed on the top of the leakage switch 201, which can avoid the situation that other electrical appliances are installed on the side of the leakage switch unit and block it and affect its heat dissipation performance; The heat-driving structure includes a heat-introducing cartridge seat 202 connected to the top of the leakage switch 201, and a heat-dissipating structure is provided on the heat-introducing cartridge seat 202. The heat-dissipating structure includes a top cover that is sealed and connected to the top opening of the heat-introducing cartridge seat 202. A heat-conducting outer frame 204 is provided inside the heat-introducing cartridge seat 202. An annular heat-conducting silicone pad 205 is sleeved on the outer periphery of the heat-conducting outer frame 204, and the outer ring wall of the annular heat-conducting silicone pad 205 is in contact with the inner cavity side wall of the heat-introducing cartridge seat 202. A heat transfer net 206 is connected to the inner cavity of the heat-conducting outer frame 204. The heat transfer net 206 is evenly provided with a plurality of through holes arranged in a circular array. A heat transfer rod 209 is inserted into each through hole. A heat insulation support rod 230 is connected to the side wall of the heat transfer rod 209 corresponding to the position of the through hole. The end of the heat insulation support rod 230 away from the heat transfer rod 209 is connected to the side wall of the through hole. A water-absorbing sheet 208 that absorbs water inside is connected to the heat transfer net 206, and the water-absorbing sheet 208 is located inside the circular array surrounded by the plurality of through holes. The bottoms of the plurality of heat transfer rods 209 are commonly connected to a strong cooling structure, and the tops of the plurality of heat transfer rods 209 are commonly connected to the bottom of the top cover.

[0034] In the process of realizing leakage protection of the DC power supply cabinet through the leakage switch unit installed inside it, the heat energy generated by the leakage switch unit during operation can not only be passively dissipated through air convection, but also can be actively absorbed by the heat drive structure installed on the top of the leakage protection unit. The heat energy generated during the operation of the leakage protection unit can be sensed inside and outside the leakage protection unit, so that when the internal temperature of the DC power supply cabinet 100 is not lower than the surface temperature of the leakage protection unit and the heat dissipation of the heat drive structure fails, the leakage switch unit can be forced to cool and dissipate heat, thereby avoiding overheating during the process of leakage protection of the DC power supply cabinet 100, thereby ensuring the safety and reliability of the operation of the entire DC power supply cabinet.

[0035] When the leakage switch 201 is in operation, the heat energy inside it can not only be dissipated to the inside of the DC power supply cabinet 100 through the heat-introducing tube seat 202, but also be continuously transferred to the annular thermal conductive silicone pad 205 through the heat-introducing tube seat 202. The heat energy is then transferred to the water-absorbing sheet 208 that absorbs water inside through the heat transfer net 206. The moisture in the water-absorbing sheet 208 absorbs heat and evaporates, and after contacting the top cover with a lower temperature, it condenses into water droplets and drips onto the water-absorbing sheet 208 again and is absorbed by the water-absorbing sheet 208, thereby realizing active circulation cooling treatment of the leakage switch 201 during operation.

[0036] Reference Figures 2 to 4 The embodiment of the present application provides a DC power supply cabinet with leakage protection, wherein the strong cooling structure comprises a heat-conducting box body 210 disposed below a plurality of heat transfer rods 209, the top of the heat-conducting box body 210 is sealed and connected with a heat-conducting box cover 235, and the bottom ends of the plurality of heat transfer rods 209 are commonly connected to the top of the heat-conducting box cover 235, and the bottom end of the heat-conducting box body 210 is connected with a heat-conducting silicone sheet 211; The heat-conducting box body 210 is provided with a fixed ring seat 217 and a heat-insulating bottom cylinder 213 which are arranged in an upper and lower interval, and the heat-insulating bottom cylinder 213 is sealingly and slidably connected to the inner cavity of the heat-conducting box body 210, and the fixed ring seat 217 is fixedly connected to the inner cavity of the heat-conducting box body 210, and a barrier film 218 is connected to the inner cavity of the fixed ring seat 217; An annular elastic enclosure sheet 219 is connected between the fixed ring seat 217 and the heat-insulating bottom tube 213, and the space surrounded by the fixed ring seat 217, the barrier film 218, the annular elastic enclosure sheet 219, and the heat-insulating bottom tube 213 is filled with a liquid medium portion 215, and the liquid medium portion 215 is liquid water. A plurality of forced pricking needles 216 are evenly connected to the top of the heat-insulating bottom tube 213 below the barrier film 218; A circle of clearance groove is provided on the inner cavity side wall of the heat-conducting box body 210 at a position corresponding to the position of the annular elastic enclosure piece 219; A metal heat-conducting piston 214 is sealed and slidably connected in the inner cavity of the heat-insulating bottom cylinder 213. The inner cavity of the heat-insulating bottom cylinder 213 is also filled with a heat-sensitive shrinkage layer 232 located above the metal heat-conducting piston 214. The heat-sensitive shrinkage layer 232 is a high-temperature temperature-sensitive wax, and the phase change temperature of the heat-sensitive shrinkage layer 232 is 70°C to 80°C. The bottom of the metal heat-conducting piston 214 is connected to a piston heat-conducting column 212, and the bottom end of the piston heat-conducting column 212 seals and penetrates the bottom of the heat-insulating bottom cylinder 213 and is connected to the bottom wall of the inner cavity of the heat-conducting box body 210. A plurality of first springs connected between the metal heat-conducting piston 214 and the bottom wall of the inner cavity of the heat-insulating bottom cylinder 213 are evenly arranged in the inner cavity of the heat-insulating bottom cylinder 213; An upper switch terminal 220 is connected to the bottom of the metal heat-conducting piston 214, and a lower switch terminal 221 connected to the bottom wall of the inner cavity of the heat-insulating bottom cylinder 213 is provided below the upper switch terminal 220; The upper switch terminal 220 and the lower switch terminal 221 are both connected to the cooling fan 203 by wires, and when the lower switch terminal 221 contacts the upper switch terminal 220, the cooling fan 203 is triggered to turn on; Opposite speed-up parts are arranged above the fixed ring seat 217 .

[0037] When the internal temperature of the DC power supply cabinet 100 is not lower than the surface temperature of the leakage protection unit, the water absorbed in the water-absorbing sheet 208 evaporates due to heat and is difficult to condense and liquefy when encountering the top cover with a higher temperature, so that the temperature of the heat-driving structure gradually rises, and the heat energy is continuously transferred to the heat-sensitive shrinkage layer 232 through the heat-conducting silicone sheet 211, the heat-conducting box body 210, the piston heat-conducting column 212 and the metal heat-conducting piston 214. When the temperature of the heat-driving structure rises to a preset critical value (that is, the phase change temperature of the heat-sensitive shrinkage layer 232), the heat-sensitive shrinkage layer 232 expands in volume due to heat and drives the heat-insulating bottom cylinder 213 to move upward. The upwardly moving heat-insulating bottom cylinder 213 drives the forced piercing needle 216 to pierce the barrier film 218 and then continuously transfers the liquid medium part 2 When the reaction bottom block 223 contacts the liquid medium portion 215, an endothermic reaction occurs to force the hollow heat transfer plate 225 to cool down. Subsequently, the heat at the top cover is continuously transferred to the low-temperature hollow heat transfer plate 225 via the heat transfer rod 209, the heat guide box cover 235 and the second spring. After the top cover cools down, the water vapor contacts the cooled top cover and is liquefied by the cold again and drips back to the water absorbing sheet 208. When the temperature inside the DC power supply cabinet 100 is not lower than the surface temperature of the leakage protection unit and the heat dissipation of the heat drive structure fails, the leakage switch unit can be forced to cool down and dissipate heat, so that the heat drive structure can resume the active circulation cooling of the heat energy generated by the leakage switch 201 during operation.

[0038] Reference Figures 2 to 4 The embodiment of the present application provides a DC power supply cabinet with leakage protection, wherein the opposite speed-up components include a hollow heat transfer plate 225 and a control unit, a plurality of second springs are evenly connected to the top of the hollow heat transfer plate 225, and the top of the second spring is connected to the bottom surface of the heat introduction box cover 235; A limited position slide seat 224 is slidably connected in the inner cavity of the hollow heat transfer plate 225. A reaction bottom block 223 is connected to the bottom of the hollow heat transfer plate 225. Pulling rods 228 are connected to the left and right sides of the reaction bottom block 223. The reaction bottom block 223 is formed by pressing ammonium nitrate powder. An airtight cylinder 226 is provided below the reaction bottom block 223 at positions corresponding to the two pulling rods 228. The bottom end of the airtight cylinder 226 is fixedly connected to the top of the fixed ring seat 217, and the two airtight cylinders 226 are respectively located on the left and right sides of the baffle film 218; The top of the airtight cylinder 226 is fixedly connected with a conveying hose 222. The end of the conveying hose 222 away from the airtight cylinder 226 penetrates into the heat-conducting box 210 and then extends into the inner cavity of the heat-conducting box 210 and is fixedly connected to the bottom of the heat-insulating bottom cylinder 213. The airtight cylinder 226 is sealed and slidably connected with a synchronous plug seat 227, and the bottom end of the pulling rod 228 seals and penetrates the top end of the corresponding airtight cylinder 226 and is connected with the synchronous plug seat 227; The top end of the pulling rod 228 passes through the bottom of the hollow heat transfer plate 225 and is connected to the bottom of the limiting slide seat 224; A pressure relief air duct is also provided in the airtight cylinder 226 , and one end of the pressure relief air duct is connected to the bottom end of the inner cavity of the airtight cylinder 226 , and the other end thereof passes through the side wall of the airtight cylinder 226 .

[0039] When the temperature of the heat-driving structure rises to a preset critical value, the heat-sensitive shrinkage layer 232 expands in volume due to the heat and drives the heat-insulating bottom cylinder 213 to move upward, the metal heat-conducting piston 214 continuously squeezes air into the inner cavity of the airtight cylinder 226 through the guide hose 222. After the air pressure in the inner cavity of the airtight cylinder 226 increases, the reaction bottom block 223 is moved toward the fixed ring seat 217 through the synchronous plug seat 227. When the heat-insulating bottom cylinder 213 drives the forced puncture needle 216 to pierce the barrier film 218 and push the liquid medium part 215 toward the reaction bottom block 223, the liquid medium part 215 is shortened to move to the reaction bottom block 223 and quickly contact the reaction bottom block 223, so that the heat-driving structure can quickly restore the active circulation cooling function and cool down and dissipate the operating leakage switch 201, thereby shortening the duration of poor heat dissipation of the leakage switch 201 due to the failure of heat dissipation in the heat-driving structure.

[0040] After the leakage switch unit has been subjected to forced cooling and heat dissipation treatment, the temperature inside the leakage switch 201 in the leakage switch unit still rises further, causing the volume of the heat-sensitive shrinking layer 232 in the heat-driving structure to further expand and drive the lower switch terminal 221 to contact the upper switch terminal 220, triggering the cooling fan 203 to turn on, and then the turned-on cooling fan 203 accelerates the air flow rate at the leakage switch unit, so that the ambient temperature around the leakage switch unit is quickly reduced and the purpose of assisting the forced cooling structure to cool the leakage switch 201 is achieved, thereby effectively avoiding overheating of the leakage switch unit.

[0041] Reference Figure 2 and Figure 5 , the embodiment of the present application provides a DC power supply cabinet with leakage protection, the control unit includes a control circuit board and two triggering terminals 231 arranged opposite to each other in an upper and lower direction, and the control circuit board is respectively connected to a wireless signal transmitter 233 and a single-chip computer 234; One of the triggering terminals 231 is connected to the limiting slide 224, and the other triggering terminal 231 is connected to the control circuit board; The control circuit board is connected to the bottom wall of the inner cavity of the hollow heat transfer plate 225 .

[0042] When the two triggering terminals 231 are in contact, the single chip microcomputer 234 is triggered to control the wireless signal transmitter 233 to turn on.

[0043] After the reaction bottom block 223 contacts with the liquid medium part 215 and reacts and gradually dissolves, when the reaction bottom block 223 is completely dissolved, the binding force on the pulling rod 228 disappears, and then the hollow heat transfer plate 225 drives the triggering terminal 231 located below to contact the triggering terminal 231 located above under the elastic pulling force of the stretched second spring and triggers the single chip microcomputer 234 to control the wireless signal transmitter 233 to turn on, and then the wireless signal transmitter 233 sends a reminder signal to the external main controller to remind relevant staff to replace the heat dissipation structure in the heat-inducing tube seat 202 as a whole in time. When replacing, the top cover covering the top of the heat-inducing tube seat 202 is removed, and then the old heat dissipation structure is removed from the heat-inducing tube seat 202 as a whole, and finally the new heat dissipation structure is reinstalled on the heat-inducing tube seat 202.

[0044] The external main controller mentioned in this article is a computer or other common prior art that plays a control role. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A DC power supply cabinet with leakage protection, characterized in that: It comprises a DC power supply cabinet body (100) and a leakage switch unit installed inside the DC power supply cabinet body (100), wherein the leakage switch unit comprises a leakage switch (201), a heat dissipation fan (203) and a heat drive structure arranged on the top of the leakage switch (201); The heat-dissipating structure comprises a heat-inducing tube seat (202) connected to the top of the leakage switch (201), a heat-dissipating structure being provided on the heat-inducing tube seat (202), the heat-dissipating structure comprising a top cover sealingly connected to the top opening of the heat-inducing tube seat (202), a heat-conducting outer frame (204) being provided inside the heat-inducing tube seat (202), an annular heat-conducting silicone pad (205) being sleeved on the outer periphery of the heat-conducting outer frame (204), and an outer ring wall of the annular heat-conducting silicone pad (205) being in contact with a side wall of the inner cavity of the heat-inducing tube seat (202), A heat transfer net (206) is connected to the inner cavity of the heat-conducting outer frame (204), a plurality of through holes arranged in a circular array are evenly opened on the heat transfer net (206), a heat transfer rod (209) is inserted into each through hole, a heat insulation support rod (230) is connected to the side wall of the heat transfer rod (209) at a position corresponding to the position of the through hole, a water-absorbing sheet (208) for absorbing water inside is connected to the heat transfer net (206), and the water-absorbing sheet (208) is located inside the circular array surrounded by the plurality of through holes; The bottoms of the plurality of heat transfer rods (209) are commonly connected to a strong cooling structure, and the tops of the plurality of heat transfer rods (209) are commonly connected to the bottom of the top cover.

2. The DC power supply cabinet with leakage protection according to claim 1, characterized in that: One end of the heat-insulating support rod (230) away from the heat transfer rod (209) is connected to the side wall of the through hole.

3. The DC power supply cabinet with leakage protection according to claim 1, characterized in that: The strong cooling structure comprises a heat-conducting box body (210) arranged below the plurality of heat transfer rods (209), the top end of the heat-conducting box body (210) is sealed and connected to a heat-conducting box cover (235), the bottom ends of the plurality of heat transfer rods (209) are commonly connected to the top of the heat-conducting box cover (235), and the bottom end of the heat-conducting box body (210) is connected to a heat-conducting silicone sheet (211); The heat-conducting box body (210) is provided with a fixed ring seat (217) and a heat-insulating bottom cylinder (213) arranged in an upper and lower spaced relationship, respectively, and the heat-insulating bottom cylinder (213) is sealingly and slidably connected to the inner cavity of the heat-conducting box body (210), the fixed ring seat (217) is fixedly connected to the inner cavity of the heat-conducting box body (210), and a barrier film (218) is connected to the inner cavity of the fixed ring seat (217); An annular elastic enclosure sheet (219) is connected between the fixed ring seat (217) and the heat-insulating bottom tube (213), and a liquid medium portion (215) is filled in the space enclosed by the fixed ring seat (217), the barrier film (218), the annular elastic enclosure sheet (219), and the heat-insulating bottom tube (213), and a top of the heat-insulating bottom tube (213) is evenly connected to a plurality of forced pricking needles (216) located below the barrier film (218); A circle of clearance groove is provided on the inner cavity side wall of the heat-conducting box body (210) at a position corresponding to the position of the annular elastic enclosure sheet (219); A metal heat-conducting piston (214) is sealed and slidably connected in the inner cavity of the heat-insulating bottom cylinder (213); the inner cavity of the heat-insulating bottom cylinder (213) is also filled with a heat-sensitive expansion layer (232) located above the metal heat-conducting piston (214); the bottom of the metal heat-conducting piston (214) is connected to a piston heat-conducting column (212); and the bottom end of the piston heat-conducting column (212) seals and penetrates the bottom of the heat-insulating bottom cylinder (213) and is connected to the bottom wall of the inner cavity of the heat-conducting box body (210); A plurality of first springs connected between the metal heat-conducting piston (214) and the bottom wall of the inner cavity of the heat-insulating bottom cylinder (213) are evenly arranged in the inner cavity of the heat-insulating bottom cylinder (213); An upper switch terminal (220) is connected to the bottom of the metal heat-conducting piston (214), and a lower switch terminal (221) connected to the bottom wall of the inner cavity of the heat-insulating bottom cylinder (213) is provided below the upper switch terminal (220); Opposite speed-up parts are arranged above the fixed ring seat (217).

4. The DC power supply cabinet with leakage protection according to claim 3 is characterized in that: The opposing speed-up component comprises a hollow heat transfer plate (225) and a control unit, a plurality of second springs are evenly connected to the top of the hollow heat transfer plate (225), and the top ends of the second springs are connected to the bottom surface of the heat introduction box cover (235); A limited position slide seat (224) is slidably connected in the inner cavity of the hollow heat transfer plate (225); a reaction bottom block (223) is connected to the bottom of the hollow heat transfer plate (225); and pulling rods (228) are connected to the left and right sides of the reaction bottom block (223); An airtight cylinder (226) is provided below the reaction bottom block (223) at positions corresponding to the two pulling rods (228); the top of the airtight cylinder (226) is fixedly connected to a guide hose (222); a synchronous plug seat (227) is sealingly and slidably connected inside the airtight cylinder (226); and the bottom end of the pulling rod (228) seals and penetrates the top of the corresponding airtight cylinder (226) and is connected to the synchronous plug seat (227); The top end of the pulling rod (228) passes through the bottom of the hollow heat transfer plate (225) and is connected to the bottom of the limiting sliding seat (224); A pressure relief air passage is also provided in the airtight cylinder (226), and one end of the pressure relief air passage is connected to the bottom end of the inner cavity of the airtight cylinder (226), and the other end of the pressure relief air passage passes through the side wall of the airtight cylinder (226).

5. The DC power supply cabinet with leakage protection according to claim 4, characterized in that: The end of the conveying hose (222) away from the airtight cylinder (226) penetrates into the interior of the heat-conducting box (210) and then extends into the inner cavity of the heat-conducting box (210) and is fixedly connected to the bottom of the heat-insulating bottom cylinder (213).

6. The DC power supply cabinet with leakage protection according to claim 4, characterized in that: The bottom end of the airtight cylinder (226) is fixedly connected to the top of the fixed ring seat (217), and the two airtight cylinders (226) are respectively located on the left and right sides of the barrier film (218).

7. The DC power supply cabinet with leakage protection according to claim 4, characterized in that: The control unit comprises a control circuit board and two triggering terminals (231) arranged in an upper and lower manner opposite to each other, and the control circuit board is respectively connected to a wireless signal transmitter (233) and a single-chip computer (234).

8. The DC power supply cabinet with leakage protection according to claim 7, characterized in that: One of the triggering terminals (231) is connected to the limiting slide seat (224), and the other triggering terminal (231) is connected to the control circuit board; The control circuit board is connected to the bottom wall of the inner cavity of the hollow heat transfer plate (225).

9. The DC power supply cabinet with leakage protection according to claim 3, characterized in that: The upper switch terminal (220) and the lower switch terminal (221) are both connected to the heat dissipation fan (203) by wires, and when the lower switch terminal (221) contacts the upper switch terminal (220), the heat dissipation fan (203) is triggered to turn on.

10. The DC power supply cabinet with leakage protection according to claim 7, characterized in that: When the two triggering terminals (231) are in contact, the single chip microcomputer (234) is triggered to control the wireless signal transmitter (233) to turn on.

Images