Outdoor primary and secondary fusion ring main unit for smart power grid user

Abstract

The invention relates to the technical field of insulation protection equipment, in particular to an outdoor primary and secondary fusion ring main unit for an intelligent power grid, which comprises a box body and a sealing box, and is characterized in that a pressure relief assembly for protecting a circuit is arranged outside the sealing box; the pressure relief assembly comprises a trigger structure arranged in the sealing box, two gas outlet pipes used for discharging high-temperature gas and two arc extinguishing structures used for extinguishing electric arcs generated during switch-off. By arranging the trigger structure and the gas outlet pipe, when faults such as short circuit occur in the sealing box, the gas outlet pipe can be quickly opened for pressure relief, and more serious problems such as explosion caused by too high gas temperature and gas pressure in the sealing box are avoided; besides, through the arrangement of the arc extinguishing structure, when the sealing box is short-circuited and switched off, arc extinguishing processing is carried out on an electric arc generated by switching off, and more serious damage caused by the electric arc is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of insulation protection equipment, and in particular relates to an outdoor primary-secondary fusion ring network box for a smart grid user. Background Art

[0002] In smart grid construction, ring mainframe boxes (RMBs) are crucial devices for power supply, branch connection, and circuit protection. Outdoor RMGs are typically integrated primary and secondary RMGs, integrating the main equipment with secondary terminal devices. They are compact, economical, and versatile.

[0003] For example, the invention application with publication number CN120090080A discloses a compact environmentally friendly gas ring network box in the field of power supply insulation protection equipment technology, including a gas box, a switch frame, an insulator, a main switch, an isolating switch and a grounding bus. The switch frame is fixed in the gas box, and the insulator, the main switch, the isolating switch and the grounding bus are all arranged in the switch frame. The main switch includes an insulating shell, an input end and an output end. The isolating switch includes an insulating main shaft, an oblique bracket and a first isolating blade. The insulating main shaft is fixedly installed at the lower frame edge of the switch frame, and the insulator is connected to the insulating main shaft in the horizontal direction. The top end of the oblique bracket extends obliquely upward to the bottom wall of the insulating shell. The first isolating blade is rotatably arranged on the oblique bracket, and the rotating parts of the two are at the top end of the oblique bracket.

[0004] Combining the above cases with actual conditions, we found the following problems: a sealed box is usually installed in the ring network box to place the switch, and the sealed box is usually filled with insulating gas to protect the switch. However, during use, if a short circuit or other circuit fault occurs in the switch, the temperature in the sealed box will rise rapidly, causing the internal insulating gas to expand, which will seriously threaten the safety of use. At the same time, in the event of danger, the switch needs to be disconnected in time. At this time, the current is extremely large, and the arc generated by the disconnection will further increase the risk and affect the safety of use. Summary of the Invention

[0005] The purpose of the present invention is to provide an outdoor primary and secondary fusion ring network box for smart grid users. By setting a trigger structure, an air outlet duct and an arc extinguishing structure, when a circuit fault occurs, the temperature inside the sealed box rises, triggering the trigger structure to quickly open the air outlet duct to discharge gas to relieve pressure and trip the circuit breaker, and at the same time spraying insulating gas to extinguish the arc and protect the circuit, thereby solving the above-mentioned problems of the prior art.

[0006] To achieve the above objectives, the present invention provides a primary-secondary fusion ring network box for outdoor smart grid users, comprising a box body and a sealed box fixed to the top of the box body. A pressure relief assembly for protecting the circuit is provided outside the sealed box. The pressure relief assembly includes a trigger structure provided in the sealed box, two gas outlet pipes for discharging high-temperature gas, and two arc extinguishing structures for extinguishing arcs generated when the circuit breaker is tripped. The trigger structure includes a heat-conducting rod, two symmetrical deformation plates fixed to the front side of the heat-conducting rod, and a shaft located in front of the deformation plate. Two abutment rods are fixed to the rear wall of the shaft, and the abutment rods correspond to the positions of the deformation plates. There are two symmetrical fixing seats on the shaft, and the fixing seats are connected to the shaft via a spring transmission. In this setting, heat is transferred to the deformation plate through the heat-conducting rod, causing the deformation plate to bend upward due to the heat, and the resistance rod is separated from the deformation plate. Under the action of the spring, the shaft rotates rapidly clockwise.

[0007] The outlet pipes at both ends are provided with butterfly valves, the two ends of the shaft pass through the left and right side walls of the sealing box and the ends are coaxially fixed with driving gears, and the two butterfly valves are connected to the driving gears through two corresponding transmission structures; In this setting, when the shaft rotates rapidly clockwise, the active teeth at both ends drive the two butterfly valves to open through the transmission structure, so that the high-temperature and high-pressure gas in the sealed box can be quickly discharged from the outlet pipe, thereby relieving pressure to protect the circuit.

[0008] The arc extinguishing structure includes a fixed tank, a movable barrel slidably connected to the outside of the fixed tank, and an air injection pipe connected to the inside of the fixed tank. The outer end of the fixed tank is fixedly connected to a plurality of first sliding rods, and the outer ends of the plurality of first sliding rods are fixedly connected to the same mounting ring. The first sliding rod passes through the outer edge of the movable barrel and the two are slidably connected. A first spring is sleeved on the first sliding rod. In this setting, when the shaft rotates rapidly clockwise, the movable barrel will slide inward quickly under the action of the first spring, squeezing the insulating environmentally friendly gas originally filled in the fixed tank and the movable barrel, so that the gas is ejected from the nozzle of the jet pipe toward the arc, blowing out the arc and preventing the arc generated when the circuit breaker is broken from causing greater damage.

[0009] In the technical solution of the present invention, a switch assembly for controlling the circuit is fixed in the sealed box, and the switch assembly includes a number of static contacts arranged horizontally on the left and right sides and a number of moving contacts corresponding to the static contacts one by one. The moving contact is located below the static contact, and a rotating shaft is provided on the rear side between the static contact and the moving contact.

[0010] In this setting, the circuit is controlled by setting the static contact and the moving contact.

[0011] In the technical solution of the present invention, a first connecting rod corresponding to a plurality of the static contacts is fixed on the rotating shaft, a second connecting rod is hinged to the front end of the first connecting rod, the front end of the second connecting rod is hinged to the middle section of the moving contact, the static contact and the moving contact are both arranged in the sealed box through insulators, the second connecting rod is tilted with the front end low and the rear end high, the rear end of the second connecting rod is higher than the rotating shaft and the rear end end is located on the front side of the rotating shaft.

[0012] In this configuration, by providing a first connecting rod and a second connecting rod, when the rotating shaft rotates clockwise, the first connecting rod pushes the second connecting rod forward, causing the moving contact to quickly separate and trip the circuit, thereby protecting the circuit.

[0013] In the technical solution of the present invention, a heat dissipation window is provided on the top of the box body, the bottom end of the air outlet pipe extends into the sealed box, and the top end extends out of the heat dissipation window, the butterfly valve located at the bottom end of the air outlet pipe is arranged horizontally, and the butterfly valve located at the top end of the air outlet pipe is arranged vertically.

[0014] In this setting, two butterfly valves are set. When the butterfly valves are opened, the outlet pipe discharges high-temperature and high-pressure gas. The top butterfly valve prevents foreign matter from entering the outlet pipe and blocking the outlet pipe during normal use, causing the outlet pipe to be unable to be used normally.

[0015] In the technical solution of the present invention, the transmission structure includes a tooth plate meshed with the active teeth on the corresponding side, a vertical rod fixed on the tooth plate at the rear end, and a driven tooth plate fixed at the top of the vertical rod. The outer end of the valve handle of the butterfly valve at the bottom end is coaxially fixed with a driven tooth, and the driven tooth is meshed with the driven tooth plate on the corresponding side. The valve handles of the two butterfly valves are connected through a bevel gear set.

[0016] In this setting, by setting up a transmission structure, when the shaft rotates rapidly clockwise, the active tooth drives the vertical rod and the driven tooth plate to slide forward through the tooth plate, driving the driven tooth to rotate counterclockwise, thereby driving the bottom butterfly valve to rotate 90° to fully open, and drives the top butterfly valve to rotate 90° to fully open through the bevel gear set, so that the high-temperature and high-pressure gas is discharged from the outlet pipe to relieve pressure.

[0017] In the technical solution of the present invention, the tooth plate is arranged horizontally front and back, the inner side wall of the tooth plate is slidably connected to the corresponding side outer wall of the sealing box through a limit block, a linkage block is fixed to the rear end of the outer side wall of the tooth plate, both ends of the rotating shaft pass through the corresponding side walls of the sealing box and a rocker arm is fixed to the end, the bottom end of the rocker arm is coaxially fixed with the corresponding end of the rotating shaft, the outer end of the linkage block extends into the corresponding inner side wall of the rocker arm and the two are slidably connected.

[0018] In this setting, by setting a rocker arm, when the tooth plate slides forward, the linkage block slides forward synchronously and pulls the rocker arm, which in turn drives the rotating shaft to rotate clockwise to realize the circuit breaker protection.

[0019] In the technical solution of the present invention, the fixed tank is fixed on the top surface of the sealed box, and a movable groove is provided in the wall of the fixed tank for the movable barrel to slide left and right. The front and rear edges of the outer end of the movable barrel are symmetrically fixed with card grooves, and the mounting ring is located on the outside of the movable barrel.

[0020] In this setting, a movable slot is provided for the movable barrel to slide left and right.

[0021] In the technical solution of the present invention, a rotating plate is coaxially fixed to the left and right ends of the shaft rod, a transmission rod is hinged to the front end of the outer side of the rotating plate, a clamping plate is hinged to the top of the transmission rod, the top of the clamping plate is concave, the clamping plate is slidably connected to the outer wall of the corresponding side of the sealing box, and the front and rear protrusions of the clamping plate are clamped to the clamping plate groove on the corresponding side.

[0022] In this setting, by setting a card plate, when the shaft rotates clockwise, the rotating plate rotates clockwise synchronously, and the card plate is driven to slide down and out of the card plate slot through the transmission rod, releasing the restriction of the movable barrel, so that the first spring pushes the movable barrel to slide inward quickly, squeezing the gas inside the movable barrel and the fixed tank, so that the gas is ejected from the injection pipe to extinguish the arc.

[0023] In the technical solution of the present invention, a piston is provided in the injection pipe at the connection point with the corresponding fixed tank, a fixing ring is provided at the injection pipe port, and a plurality of regularly distributed second sliding rods are fixed on the outer end surface of the fixing ring in an annular shape.

[0024] In this arrangement, the piston can slide along the second slide rod.

[0025] In the technical solution of the present invention, the second sliding rod passes through the piston and is fixedly connected to the injection pipe port, the second sliding rod is slidably connected to the piston, a second spring is provided on the second sliding rod between the fixing ring and the piston, and the injection pipe outlet corresponds to the position of the static contact.

[0026] In this arrangement, by providing a second spring, during normal use, the clamping plate restricts the movable barrel in the clamping plate groove, and at this time the second spring pushes the piston to close the fixed tank.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, by providing a trigger structure, an air outlet pipe and a butterfly valve, when a fault occurs in the sealed box, the gas in the sealed box heats up and expands rapidly, the heat-conducting rod is heated and transfers heat to the deformable plate, and the deformable plate is heated and bent upward, causing the abutment rod to separate from the deformable plate. The clockwork spring drives the shaft to rotate rapidly clockwise, driving the active gear to rotate clockwise, and then drives the vertical rod and the driven gear plate to slide forward through the gear plate, driving the driven gear to rotate counterclockwise, and then drives the bottom butterfly valve to rotate 90 degrees to open, and drives the top butterfly valve to rotate 90 degrees to open through the bevel gear set, so that the high-temperature and high-pressure gas is discharged from the outlet pipe to relieve pressure.

[0028] 2. In the present invention, by setting a rocker arm, when the shaft rotates, the linkage block slides forward synchronously to pull the rocker arm, thereby driving the rotating shaft to rotate clockwise, causing the first connecting rod to push the second connecting rod forward to drive the moving contact to rotate clockwise, so that the moving contact and the static contact are quickly separated and the circuit is disconnected, thereby protecting the circuit.

[0029] 3. In the present invention, by providing an arc extinguishing structure, when the shaft rotates clockwise, the rotating plate rotates clockwise synchronously, and the transmission rod drives the card plate to slide down and out of the card plate groove, releasing the restriction of the movable barrel, so that the first spring pushes the movable barrel to slide inward quickly, squeezing the gas inside the movable barrel and the fixed tank, so that the gas is ejected from the injection pipe to the moving contact and the static contact to extinguish the arc. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of a beehive of the present invention; Figure 3 This is a schematic diagram of the interior of the sealed box in the present invention; Figure 4 This is an exploded view of the switch assembly in the present invention; Figure 5 Schematic diagram of the trigger structure in the present invention; Figure 6 This is the exploded diagram of the trigger structure in the present invention; Figure 7 Schematic diagram of the gas outlet structure in the present invention; Figure 8 This is an exploded view of the gas outlet structure in the present invention; Figure 9 Schematic diagram of the arc extinguishing structure in the present invention; Figure 10 It is a cross-sectional view of the fixed tank in the present invention; Figure 11 This is an exploded view of the movable barrel in the present invention; Figure 12 A partial cross-sectional view of the air injection pipe in the present invention; Description of reference numerals: 100. Box body; 101. Heat dissipation window; 200, sealed box; 300, pressure relief assembly; 301, air outlet pipe; 302, butterfly valve; 303, rocker arm; 310, trigger structure; 311, heat conduction rod; 312, deformation plate; 313, shaft; 314, stop rod; 315, fixed seat; 316, spring; 317, driving gear; 318, rotating plate; 320, arc extinguishing structure; 321, fixed tank; 321a, movable groove; 322, movable barrel; 322a, card slot; 32 3. Mounting ring; 324. First slide bar; 325. First spring; 326. Injection tube; 326a. Fixing ring; 326b. Second slide bar; 326c. Second spring; 327. Transmission rod; 328. Clamping plate; 329. Piston; 330. Transmission structure; 331. Tooth plate; 332. Vertical rod; 333. Driven tooth plate; 334. Driven tooth; 335. Bevel gear set; 336. Limit block; 337. Linkage block; 400, switch assembly; 401, static contact; 402, moving contact; 403, rotating shaft; 404, first connecting rod; 405, second connecting rod; 406, insulator. DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0032] Unless expressly stated otherwise, throughout the specification, the term “comprise” or variations thereof such as “include” or “comprising” will be understood to include the stated elements or components but not to exclude other elements or components.

[0033] Reference Figures 1-12 As shown, this embodiment provides a technical solution: The smart grid user's outdoor primary and secondary fusion ring network box in the present invention includes a box body 100 and a sealed box 200 fixed at the top of the box body 100. It should be noted that the sealed box 200 is generally filled with environmentally friendly gas for insulating and protecting the switch. A pressure relief component 300 for protecting the circuit is provided outside the sealed box 200. By providing the pressure relief component 300, when a short circuit or other fault occurs in the sealed box 200, the pressure relief component 300 can quickly discharge the heated high-temperature and high-pressure gas to avoid causing greater damage to other electrical components in the box body 100. The pressure relief component 300 includes a trigger structure 310 arranged in the sealed box 200, two air outlet pipes 301 for discharging high-temperature gas, and two arc extinguishing structures 320 for extinguishing the arc generated when the switch is broken.

[0034] The trigger structure 310 includes a heat-conducting rod 311, two symmetrically fixed deformation plates 312 on the front side of the heat-conducting rod 311, and a shaft 313 located on the front side of the deformation plate 312. The heat-conducting rod 311 can transfer the temperature increase caused by short circuits at different positions to the deformation plate 312, causing the deformation plate 312 to deform. The heat-conducting rod 311 is made of an insulating material such as aluminum nitride, which has good thermal conductivity and is non-conductive. It should be noted that the deformation plate 312 is composed of two metal plates stacked up and down, and the thermal expansion coefficient of the upper metal plate is smaller than that of the lower metal plate. When a short circuit or other fault occurs in the sealed box 200, The temperature inside the sealed box 200 rises rapidly, and the two metal plates are deformed by the heat. Due to the difference in thermal expansion coefficients, the deformation plate 312 bends upward. Two push rods 314 are fixed to the rear wall of the shaft 313. The push rods 314 correspond to the positions of the deformation plate 312. The push rods 314 are located on the lower side of the deformation plate 312 and abut against the shaft 313. There are two symmetrical fixing seats 315 on the left and right of the shaft 313. The fixing seats 315 and the shaft 313 are connected by a clockwork spring 316. When the deformation plate 312 bends upward by the heat, the push rods 314 separate from the deformation plate 312. Under the action of the clockwork spring 316, the shaft 313 rotates rapidly clockwise.

[0035] It should be noted that both ends of the heat-conducting rod 311 are provided with mounting seats and fixed to the inner wall of the sealing box 200. Both ends of the heat-conducting rod 311 are plugged into the mounting seats and fixed with pins. During subsequent maintenance, the staff only needs to pull out the pins to rotate the heat-conducting rod 311 so that the support rod 314 can return to the bottom of the deformation plate 312, which is convenient for maintenance.

[0036] Butterfly valves 302 are provided at the ends of the outlet pipe 301. The two ends of the shaft 313 pass through the left and right side walls of the sealing box 200 and the ends are coaxially fixed with driving teeth 317. The two butterfly valves 302 are connected to the driving teeth 317 through two corresponding transmission structures 330. When the shaft 313 rotates clockwise rapidly, the driving teeth 317 at both ends drive the two butterfly valves 302 to open through the transmission structure 330, so that the high-temperature and high-pressure gas in the sealing box 200 can be quickly discharged from the outlet pipe 301.

[0037] The arc extinguishing structure 320 includes a fixed tank 321, a movable barrel 322 located on the outside of the fixed tank 321 and connected in a sliding manner, and an air injection pipe 326 connected to the inside of the fixed tank 321. It should be noted that the fixed tank 321 and the movable barrel 322 are internally connected, and the outer walls of the fixed tank 321 and the movable barrel 322 are made of a metal ceramic material with poor thermal conductivity to prevent the temperature in the sealed box 200 from rising and heating the arc extinguishing structure 320. Since the fixed tank 321 and the movable barrel 322 are filled with gas, the fixed tank 321 and the movable barrel 322 are not able to exhaust the gas in time and explode, causing greater losses. A plurality of first slide rods 324 are fixedly connected to the outer end, and the outer ends of the plurality of first slide rods 324 are fixedly connected to the same mounting ring 323. The first slide rods 324 pass through the outer edge of the movable barrel 322 and the two are slidably connected. A first spring 325 is sleeved on the first slide rod 324. When the shaft 313 rotates clockwise rapidly, the movable barrel 322 will slide inward rapidly under the action of the first spring 325 and squeeze the insulating environmentally friendly gas originally filled in the fixed tank 321 and the movable barrel 322, so that the gas is ejected from the nozzle of the jet pipe 326 toward the arc, thereby blowing out the arc and avoiding greater damage caused by the arc generated when the switch is broken.

[0038] See also Figure 1-Figure 4 As shown, a switch assembly 400 for controlling the circuit is fixed in the sealed box 200. The insulating gas protection switch assembly 400 in the sealed box 200 includes a plurality of static contacts 401 arranged horizontally on the left and right sides and a plurality of moving contacts 402 corresponding to the static contacts 401 one by one. The moving contact 402 is located below the static contact 401. A rotating shaft 403 is provided on the rear side between the static contact 401 and the moving contact 402. When the moving contact 402 contacts the static contact 401, the entire circuit is connected.

[0039] Furthermore, a first connecting rod 404 corresponding to several static contacts 401 is fixed on the rotating shaft 403, and a second connecting rod 405 is hinged at the front end of the first connecting rod 404. The front end of the second connecting rod 405 is hinged to the middle section of the moving contact 402. The static contact 401 and the moving contact 402 are both arranged in the sealed box 200 through the insulator 406. The static contact 401 is fixedly connected to the corresponding insulator 406, and the bottom end of the moving contact 402 is hinged to the corresponding insulator 406. The second connecting rod 405 is tilted with the front end low and the rear end high. The rear end of the second connecting rod 405 is higher than the rotating shaft 403 and the rear end end is located on the front side of the rotating shaft 403. When the rotating shaft 403 rotates clockwise, the first connecting rod 404 pushes the second connecting rod 405 forward and drives the moving contact 402 to rotate clockwise, so that the moving contact 402 and the static contact 401 are quickly separated and the circuit breaker is disconnected to protect the circuit.

[0040] See also Figure 1 、 Figure 7 and Figure 8As shown, a heat dissipation window 101 is provided on the top of the box body 100, the bottom end of the air outlet pipe 301 extends into the sealed box 200, and the top end extends out of the heat dissipation window 101, the butterfly valve 302 at the bottom end of the air outlet pipe 301 is arranged horizontally, and the butterfly valve 302 at the top end of the air outlet pipe 301 is arranged vertically, and the air outlet pipe 301 is L-shaped. When the butterfly valve 302 is opened, the air outlet pipe 301 discharges high-temperature and high-pressure gas, and the butterfly valve 302 at the top prevents foreign matter from entering the air outlet pipe 301 and blocking the air outlet pipe 301 during normal use, causing the air outlet pipe 301 to be unable to be used normally.

[0041] See also Figure 5-Figure 8 As shown, the transmission structure 330 includes a tooth plate 331 that meshes with the corresponding side active tooth 317, a vertical rod 332 fixed to the rear end of the tooth plate 331, and a driven tooth plate 333 fixed to the top of the vertical rod 332. The outer end of the valve handle of the bottom butterfly valve 302 is coaxially fixed with a driven tooth 334, which meshes with the corresponding side driven tooth plate 333. The valve handles of the two butterfly valves 302 are connected through a bevel gear set 335. When the shaft 313 rotates clockwise rapidly, the active tooth 317 drives the vertical rod 332 and the driven tooth plate 333 to slide forward through the tooth plate 331, driving the driven tooth 334 to rotate counterclockwise, thereby driving the bottom butterfly valve 302 to rotate 90 degrees and fully open, and drives the top butterfly valve 302 to rotate 90 degrees and fully open through the bevel gear set 335, so that the high-temperature and high-pressure gas is discharged from the outlet pipe 301 to relieve the pressure.

[0042] Specifically, the tooth plate 331 is arranged horizontally front and back, and the inner wall of the tooth plate 331 is slidably connected to the corresponding side outer wall of the sealing box 200 through the limit block 336. The tooth plate 331 is limited and supported by setting the limit block 336. The outer wall of the tooth plate 331 is fixed with a linkage block 337 at the rear end. The two ends of the rotating shaft 403 pass through the corresponding side walls of the sealing box 200 and the rocker arm 303 is fixed at the end. The bottom end of the rocker arm 303 is coaxially fixed with the corresponding end of the rotating shaft 403. The outer end of the linkage block 337 extends into the inner wall of the corresponding rocker arm 303 and the two are slidably connected. When the tooth plate 331 slides forward, the linkage block 337 slides forward synchronously and pulls the rocker arm 303, thereby driving the rotating shaft 403 to rotate clockwise, realizing the circuit breaker protection circuit.

[0043] See also Figures 9-11 As shown, the fixed tank 321 is fixed on the top surface of the sealed box 200, and a movable groove 321a is provided in the wall of the fixed tank 321 for the movable barrel 322 to slide left and right. The movable barrel 322 can slide quickly in the movable groove 321a. At the same time, the outer end of the movable groove 321a is sealed by setting a sealing ring. The edge of the inner end surface of the movable barrel 322 is convex, and the outer end of the movable groove 321a is concave to match the inner end surface of the movable barrel 322, which further improves the sealing performance. The front and rear edges of the outer end of the movable barrel 322 are symmetrically fixed with card grooves 322a, and the mounting ring 323 is located on the outside of the movable barrel 322.

[0044] In addition, rotating plates 318 are coaxially fixed to the left and right ends of the shaft 313, and a transmission rod 327 is hinged on the outer side of the rotating plate 318 near the front end. A clamping plate 328 is hinged on the top of the transmission rod 327. The top of the clamping plate 328 is concave, and the clamping plate 328 is slidably connected to the outer wall of the corresponding side of the sealing box 200. The front and rear protrusions of the clamping plate 328 are clamped with the corresponding side clamping plate groove 322a. When the shaft 313 rotates clockwise, the rotating plate 318 rotates clockwise synchronously, and the transmission rod 327 drives the clamping plate 328 to slide down and disengage from the clamping plate groove 322a, releasing the restriction of the movable barrel 322, so that the first spring 325 pushes the movable barrel 322 to slide inward quickly, squeezing the gas inside the movable barrel 322 and the fixed tank 321, so that the gas is ejected from the injection pipe 326 to extinguish the arc.

[0045] See also Figure 12 As shown, a piston 329 is provided in the injection pipe 326 where it is connected to the corresponding fixed tank 321, a fixing ring 326a is provided at the end of the injection pipe 326, and a plurality of regularly distributed second slide rods 326b are fixed on the outer end surface of the fixing ring 326a in an annular shape. The second slide rod 326b passes through the piston 329 and is fixedly connected to the end of the injection pipe 326. The second slide rod 326b is slidably connected to the piston 329. A second spring 326c is provided on the second slide rod 326b between the fixing ring 326a and the piston 329. The air outlet of the tube 326 corresponds to the position of the static contact 401. During normal use, the card plate 328 restricts the movable barrel 322 in the card plate groove 322a. At this time, the second spring 326c pushes the piston 329 to close the fixed tank 321. When the card plate 328 is separated from the card plate groove 322a, the movable barrel 322 slides inward and squeezes the gas inside the movable barrel 322 and the fixed tank 321, causing the internal air pressure to increase rapidly and push open the piston 329. The gas is quickly ejected from the jet pipe 326 and blows towards the arc to extinguish the arc.

[0046] It should be noted that the elastic force of the clockwork spring 316 needs to be large enough to ensure that when the clockwork spring 316 drives the shaft 313 to rotate, it can drive other structures to move, and at the same time ensure that the shaft 313 rotates quickly, so that other components can respond quickly and quickly trip, release pressure and extinguish the arc. In addition, the air pressure of the gas filled in the fixed tank 321 and the movable barrel 322 is less than the elastic force of the second spring 326c, so as to prevent the piston 329 from being directly pushed open. At the same time, the elastic force of the first spring 325 is much greater than the second spring 326c. At the same time, when the internal gas is compressed, the air pressure can quickly exceed the elastic force of the second spring 326c, ensuring that the first spring 325 drives the movable barrel 322 to slide and compress the gas, so that the gas pressure increases rapidly and quickly pushes the piston 329, opening the jet pipe 326 to eject the arc.

[0047] The working principle of the primary and secondary integrated ring network box for smart grid users in the present invention is as follows: When a short circuit or other fault occurs in the sealed box 200, the gas in the sealed box 200 rapidly heats up and expands. The heat-conducting rod 311 transfers heat to the deformable plate 312, which bends upward due to the heat, causing the stop rod 314 to separate from the deformable plate 312. Under the action of the spring 316, the shaft 313 rotates rapidly clockwise. When the shaft 313 rotates clockwise, the driving gear 317 drives the vertical rod 332 and the driven gear plate 333 to slide forward through the gear plate 331, driving the driven gear 334 to rotate counterclockwise, thereby driving the bottom butterfly valve 302 to rotate 90 degrees and fully open. The bevel gear set 335 also drives the top butterfly valve 302 to rotate 90 degrees and fully open, allowing the high-temperature and high-pressure gas to be discharged from the outlet pipe 301 to relieve pressure. At the same time, as the shaft 313 rotates, the linkage block 337 synchronously slides forward and pulls the rocker arm 303, which in turn drives the rotating shaft 403 to rotate clockwise, causing the first connecting rod 404 to push the second connecting rod 405 forward, driving the moving contact 402 to rotate clockwise, causing the moving contact 402 and the static contact 401 to quickly separate and trip the circuit breaker, thereby protecting the circuit. In addition, when the shaft 313 rotates clockwise, the rotating plate 318 rotates clockwise synchronously, and drives the card plate 328 to slide down and disengage from the card plate groove 322a through the transmission rod 327, releasing the restriction of the movable barrel 322, so that the first spring 325 pushes the movable barrel 322 to slide inward quickly, squeezing the gas inside the movable barrel 322 and the fixed tank 321, so that the gas is ejected from the injection pipe 326 to the moving contact 402 and the static contact 401 to extinguish the arc.

[0048] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to make and utilize a variety of exemplary embodiments of the invention and various options and modifications. The scope of the invention is intended to be defined by the description and its equivalents.

Claims

1. The outdoor primary and secondary integrated ring network box of the smart grid includes a box body and a sealing box fixed on the top of the box body, which is characterized by: A pressure relief assembly for protecting the circuit is provided outside the sealed box. The pressure relief assembly includes a trigger structure provided inside the sealed box, two gas outlet pipes for discharging high-temperature gas, and two arc extinguishing structures for extinguishing the arc generated when the switch is tripped. The trigger structure includes a heat-conducting rod, two symmetrical deformation plates fixed to the front side of the heat-conducting rod, and a shaft located in front of the deformation plate. Two abutment rods are fixed to the rear wall of the shaft, and the abutment rods correspond to the positions of the deformation plates. There are two symmetrical fixing seats on the shaft, and the fixing seats are connected to the shaft via a spring transmission. The outlet pipes at both ends are provided with butterfly valves, the two ends of the shaft pass through the left and right side walls of the sealing box and the ends are coaxially fixed with driving gears, and the two butterfly valves are connected to the driving gears through two corresponding transmission structures; The arc extinguishing structure includes a fixed tank, a movable barrel slidably connected to the outside of the fixed tank, and an injection pipe connected to the inside of the fixed tank. The outer end of the fixed tank is fixedly connected to a plurality of first sliding rods, and the outer ends of the plurality of first sliding rods are fixedly connected to the same mounting ring. The first sliding rod passes through the outer end edge of the movable barrel and the two are slidably connected. A first spring is sleeved on the first sliding rod.

2. The smart grid outdoor primary and secondary fusion ring network box according to claim 1, characterized in that: A switch assembly for controlling the circuit is fixed in the sealed box. The switch assembly includes a plurality of static contacts arranged horizontally on the left and right sides and a plurality of moving contacts corresponding to the static contacts one by one. The moving contacts are located below the static contacts, and a rotating shaft is provided on the rear side between the static contacts and the moving contacts.

3. The smart grid outdoor primary and secondary fusion ring network box according to claim 2, characterized in that: A first connecting rod corresponding to a plurality of the static contacts is fixed on the rotating shaft, a second connecting rod is hinged to the front end of the first connecting rod, the front end of the second connecting rod is hinged to the middle section of the moving contact, the static contact and the moving contact are both arranged in the sealed box through insulators, the second connecting rod is tilted with the front end low and the rear end high, the rear end of the second connecting rod is higher than the rotating shaft and the rear end end is located on the front side of the rotating shaft.

4. The smart grid outdoor primary and secondary integrated ring network box according to claim 1, characterized in that: A heat dissipation window is provided on the top of the box body, the bottom end of the air outlet pipe extends into the sealed box, and the top end extends out of the heat dissipation window. The butterfly valve at the bottom end of the air outlet pipe is arranged horizontally, and the butterfly valve at the top end of the air outlet pipe is arranged vertically.

5. The smart grid outdoor primary and secondary integrated ring network box according to claim 3, characterized in that: The transmission structure includes a tooth plate meshed with the active teeth on the corresponding side, a vertical rod fixed on the tooth plate at the rear end, and a driven tooth plate fixed at the top of the vertical rod. The outer end of the valve handle of the butterfly valve at the bottom end is coaxially fixed with a driven tooth, and the driven tooth is meshed with the driven tooth plate on the corresponding side. The valve handles of the two butterfly valves are connected through a bevel gear set.

6. The smart grid outdoor primary and secondary integrated ring network box according to claim 5, characterized in that: The tooth plate is arranged horizontally front and back, and the inner wall of the tooth plate is slidably connected to the corresponding outer wall of the sealing box through a limit block. A linkage block is fixed to the rear end of the outer wall of the tooth plate. Both ends of the rotating shaft pass through the corresponding side walls of the sealing box and a rocker arm is fixed to the end. The bottom end of the rocker arm is coaxially fixed with the corresponding end of the rotating shaft, and the outer end of the linkage block extends into the corresponding inner wall of the rocker arm and the two are slidably connected.

7. The smart grid outdoor primary and secondary integrated ring network box according to claim 3, characterized in that: The fixed tank is fixed on the top surface of the sealed box. A movable groove is provided in the wall of the fixed tank for the movable barrel to slide left and right. The front and rear edges of the outer end of the movable barrel are symmetrically fixed with card slots, and the mounting ring is located outside the movable barrel.

8. The smart grid outdoor primary and secondary integrated ring network box according to claim 7, characterized in that: The left and right ends of the shaft rod are coaxially fixed with rotating plates, the outer side of the rotating plate is hinged with a transmission rod near the front end, the top of the transmission rod is hinged with a clamping plate, the top of the clamping plate is concave, the clamping plate is slidably connected to the outer wall of the corresponding side of the sealing box, and the front and rear protrusions of the clamping plate are clamped with the clamping plate groove on the corresponding side.

9. The smart grid outdoor primary and secondary integrated ring network box according to claim 8, characterized in that: A piston is provided in the injection pipe at the connection point with the corresponding fixed tank, a fixing ring is provided at the injection pipe port, and a plurality of regularly distributed second sliding rods are fixed on the outer end surface of the fixing ring in an annular shape.

10. The smart grid outdoor primary and secondary integrated ring network box according to claim 9, characterized in that: The second slide rod passes through the piston and is fixedly connected to the air injection pipe port. The second slide rod is slidably connected to the piston. A second spring is provided on the second slide rod between the fixing ring and the piston. The air outlet of the air injection pipe corresponds to the position of the static contact.

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