Prefabricated low-voltage transfer box for smart power grid

Abstract

The invention belongs to the technical field of box-type substations, and discloses a pre-assembled low-voltage transfer box for a smart power grid, which comprises a transformer box body for placing a transformer and a high-low voltage cabinet, a moving box is slidably arranged in the transformer box body, and a plurality of nozzles rotationally connected with the moving box are arranged on the moving box in a penetrating manner. The power transformation box body and the moving box are jointly provided with a liquid supply mechanism used for supplying perfluorohexanone into the spray head and driving the spray head to rotate, and the power transformation box body is provided with a displacement mechanism used for driving the moving box to move in a reciprocating mode. According to the device, the liquid supply mechanism and the displacement mechanism are arranged, and the dry powder is replaced with the perfluorohexanone, so that on one hand, the perfluorohexanone is rapidly vaporized and volatilized after fire extinguishing without residues, secondary damage to electrical equipment is avoided, manual cleaning is not needed, and the labor intensity of workers is reduced; on the other hand, rotation of the spray head is not affected when the moving box is in a static or moving state, and therefore the overall fire extinguishing effect and range are ensured.

Description

Technical Field

[0001] This invention relates to the field of prefabricated substation technology, and in particular to a prefabricated low-voltage transfer box for smart grids. Background Technology

[0002] Prefabricated low-voltage junction boxes, also known as box-type substations, are complete sets of power distribution devices that integrate high-voltage switches, transformers, low-voltage switches, power metering devices, and reactive power compensation equipment into a steel structure box.

[0003] Chinese invention patent CN120414286A discloses a fireproof prefabricated substation, including a substation body, a ventilation panel, and a connecting frame. The ventilation panel is connected to the right side of the substation body, and the connecting frame is connected to the upper inside of the substation body. The substation also includes connecting pipes, a detection plate, a negative pressure dry powder box, a movable frame, a telescopic pipe, a rotating nozzle, a drive mechanism, a positioning component, a rotating mechanism, and a control mechanism. Several connecting pipes are evenly spaced on the connecting frame. A detection plate is connected inside the substation body. A negative pressure dry powder box is installed on the upper right side of the substation body. The transformer substation has a sliding connection with a movable frame. Two telescopic tubes connect the movable frame to the negative pressure dry powder box. Two rotating nozzles are rotatably connected to the movable frame, and each rotating nozzle is connected to an adjacent telescopic tube. The transformer substation body is equipped with a drive mechanism for moving the movable frame. The movable frame is equipped with a positioning component and a rotating mechanism. The transformer substation body is equipped with a control mechanism. The drive mechanism includes a special-shaped motor, a screw, a retaining ball, and a compression spring. The right side of the transformer substation body is connected to a special-shaped motor for moving the movable frame. The detection plate is electrically connected to the special-shaped motor. A screw is rotatably connected to the upper side inside the transformer substation body.

[0004] When a fire occurs in an existing substation, dry powder is used for firefighting. After the fire is extinguished, the dry powder needs to be cleaned up in time to ensure the normal operation of some electrical appliances, which increases the workload of the staff. On the other hand, when extinguishing a fire at a specific point inside the enclosure, the screw is in a stationary state, and the rotating nozzle cannot rotate to spray dry powder, which will affect the overall fire extinguishing effect and range. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a pre-installed low-voltage transfer box for smart grids.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a prefabricated low-voltage transfer box for smart grids, comprising a transformer box for housing transformers and high and low voltage switchgear, a movable box slidably disposed inside the transformer box, a plurality of nozzles rotatably connected to the movable box being disposed through the movable box, a liquid supply mechanism for supplying perfluorohexanone to the nozzles and driving the nozzles to rotate is jointly disposed on the transformer box and the movable box, and a displacement mechanism for driving the movable box to reciprocate is disposed on the transformer box.

[0007] By adopting the above technical solution, the mobile box is driven to reciprocate through a displacement mechanism, while perfluorohexanone liquid is supplied to the nozzle through a liquid supply mechanism, which drives the nozzle to rotate. The rotating nozzle sprays out the perfluorohexanone liquid for fire extinguishing. In addition, the mobile box can be driven to a fixed position through the displacement mechanism, and the nozzle rotates to extinguish the fire at the designated location. On the one hand, perfluorohexanone quickly vaporizes and evaporates after extinguishing the fire, leaving no residue and causing no secondary damage to electrical equipment. It also eliminates the need for manual cleaning, reducing the labor intensity of the staff. On the other hand, whether the mobile box is stationary or in motion, it does not affect the rotation of the nozzle, thus ensuring the overall fire extinguishing effect and range.

[0008] Furthermore, the liquid supply mechanism includes a rotating component and a rotating assembly. The rotating assembly includes a worm gear fixedly sleeved on the nozzle, a worm rotatably installed in the movable box and meshing with the worm gear, a first volute fixed in the movable box, and a first impeller disposed in the first volute. The worm passes through the first volute and is rotatably connected. The first impeller is fixedly sleeved on the worm. The number of worm gears is equal to the number of nozzles and their positions correspond one-to-one. The rotating assembly includes a water supply pipe fixed to the movable box, a telescopic pipe connected to the water supply pipe, a water supply branch pipe connected to the first volute, and a return branch pipe connected to the first volute. The ends of the water supply branch pipe and the return branch pipe away from the first volute are both connected to the water supply pipe. The water supply branch pipe is equipped with a one-way valve that allows liquid to be discharged from the water supply pipe into the first volute. The return branch pipe is equipped with a one-way valve that allows liquid to be discharged from the first volute into the water supply pipe. The nozzle passes through the water supply pipe and is rotatably connected. The liquid supply mechanism also includes a liquid supply component for supplying perfluorohexanone liquid into the telescopic pipe.

[0009] By adopting the above technical solution, perfluorohexanone liquid is supplied to the telescopic pipe through the liquid supply assembly. The liquid will flow from the water supply pipe into the nozzle to ensure normal fire extinguishing. On the other hand, the liquid will flow from the water supply pipe into the water supply branch pipe, the first volute, and the return branch pipe in sequence, and finally be discharged from the return branch pipe back into the water supply pipe. During this process, the liquid will drive the first impeller to rotate, thereby causing the worm connected to the first impeller, the worm wheel meshing with the worm, and the nozzle fixed to the worm wheel to rotate, thus ensuring the continuous rotation of the nozzle.

[0010] Furthermore, the liquid supply assembly includes a connection box fixed to the transformer box body, a storage box fixed to the bottom of the connection box, and a supply box fixed inside the connection box. The inner wall of the transformer box body is provided with a through hole communicating with the connection box. The supply box is provided with a cavity. The liquid supply assembly also includes a liquid extraction pipe communicating with the cavity. The liquid extraction pipe extends into the storage box. The telescopic pipe is communicating with the cavity. The liquid supply mechanism further includes a liquid extraction component, a drive component, and a gas supply component. The liquid extraction component includes a sealing slider slidably disposed in the cavity, a sliding block that passes through the top of the cavity and slidably engages with it, a connecting plate fixed on the sliding block, a connecting column disposed on the connecting plate, and an adjusting plate rotatably installed in the connecting box. The sliding block is fixed to the sealing slider, and the adjusting plate has an adjusting groove that slidably engages with the connecting column. The adjusting groove is eccentrically disposed with the adjusting plate.

[0011] By adopting the above technical solution, the rotating adjustment plate, due to the eccentric setting of the adjustment groove and the sliding setting of the adjustment groove and the connecting column, causes the connecting column, the connecting plate connected to the connecting column, the sliding block connected to the connecting plate, and the sealing slider connected to the sliding block to all rise and fall. When the sealing slider rises, the liquid in the storage tank is discharged into the cavity through the liquid extraction pipe. When the sealing slider falls, the liquid in the cavity is discharged into the telescopic pipe, so as to ensure the normal fire extinguishing operation of the device.

[0012] Furthermore, the drive assembly includes a rotating rod that passes through and is rotatably connected to the connecting box, and a second volute fixed to the connecting box. The rotating rod passes through and is rotatably connected to the second volute. The rotating rod is fixed and coaxially arranged with the adjusting plate. The drive assembly also includes a second impeller fixedly sleeved on the rotating rod, an inlet tee fixed and connected to the second volute, and an outlet tee fixed and connected to the second volute. A solenoid valve is provided at one end of the inlet tee connected to the second volute. The end of the inlet tee away from the second volute is connected to the municipal high-pressure water supply. The end of the outlet tee away from the second volute is connected to the municipal low-pressure pipeline. A one-way valve is provided at the end of the outlet tee connected to the second volute, allowing water to flow only from the second volute to the municipal pipeline. Two cavities are provided. The number of sealing sliders is equal to the number of cavities and their positions correspond one-to-one. The other sealing slider is also fixed to the sliding block. The air supply assembly includes an air supply pipe communicating with the other cavity, an air delivery pipe communicating with the other cavity, and a filter block detachably connected to the air delivery pipe. The air delivery pipe is connected to the telescopic pipe. The air supply pipe is equipped with a one-way valve that allows air to enter the cavity only from the outside. The air delivery pipe is equipped with a one-way valve that allows air to exit from the cavity into the telescopic pipe only.

[0013] By adopting the above technical solution, in the event of a fire, the solenoid valve at the end connecting the inlet tee and the second volute is activated. Water from the municipal water pipe flows into the second volute through the inlet tee, then exits through the second volute to the outlet tee, and finally exits through the outlet tee into the municipal pipeline. During this process, the second impeller, the rotating rod connected to the second impeller, and the adjusting plate connected to the rotating rod all rotate to ensure a normal supply of perfluorohexanone liquid. Furthermore, during the lifting and lowering of the sliding block, it drives the sealing slider in another cavity to lift and lower. When the sealing slider rises, outside air is discharged into the cavity through the air supply pipe; when the sealing slider falls, the air in the cavity is discharged into the telescopic pipe through the air delivery pipe, mixing with the liquid in the telescopic pipe and atomizing the liquid, thus improving the fire extinguishing effect.

[0014] Furthermore, the displacement mechanism includes a reciprocating screw rotatably mounted in both the transformer box and the connecting box, a guide rod fixed in both the transformer box and the connecting box, a third volute fixed to the connecting box, and a third impeller disposed in the third volute. The reciprocating screw passes through the moving box and is threadedly connected, the guide rod passes through the moving box and is slidably engaged, the reciprocating screw sequentially passes through the connecting box and the third volute and is rotatably connected, the third impeller is fixedly sleeved on the reciprocating screw, the end of the inlet tee near the third volute is connected to the third volute, the end of the outlet tee near the third volute is connected to the third volute, a solenoid valve is provided at the end of the inlet tee connected to the third volute, and a one-way valve is provided at the end of the outlet tee connected to the third volute, allowing water to flow only through the third volute to the municipal pipeline.

[0015] By adopting the above technical solution, the solenoid valve on the end connected to the inlet tee and the third volute is turned on. Water in the high-pressure water pipe is discharged from the inlet tee to the third volute, then from the third volute to the outlet tee, and finally from the outlet tee to the low-pressure pipe. During this process, the water flow drives the third impeller to rotate, which in turn causes the reciprocating screw connected to the third impeller to rotate. This enables the reciprocating motion of the movable box, which is threadedly connected to the reciprocating screw. Similarly, when the movable box moves to the designated position and needs to be used for targeted fire extinguishing, the solenoid valve can be turned off. This method is quite convenient to use.

[0016] Furthermore, a filter plate is provided inside the transformer box, and a heat dissipation mechanism is provided on the transformer box. The heat dissipation mechanism includes a heat dissipation component, which includes a heat dissipation pipe that is installed through and fixed on the transformer box and two baffles that are rotatably installed inside the heat dissipation pipe. The filter plate is fixed inside the heat dissipation pipe. The heat dissipation mechanism also includes a transmission component for driving the two baffles to rotate synchronously.

[0017] By adopting the above technical solution, when the electrical components inside the transformer box are working normally, the transmission component drives the baffle to rotate 90 degrees, so that the two baffles are in a horizontal state. At this time, the heat generated inside the transformer box can be discharged through the heat dissipation pipe. In addition, in the event of a fire, the transmission component drives the baffle to rotate and reset, and the baffle blocks the heat dissipation pipe, thus isolating the inside of the transformer box from the outside world, reducing the amount of air entering the transformer box, and improving the fire extinguishing effect of the device.

[0018] Furthermore, the transmission assembly includes a rotating column fixed to the baffle, the rotating column passing through the heat dissipation pipe and rotatably connected, the transmission assembly also includes a synchronous pulley fixedly sleeved on the rotating column, a synchronous belt meshing with the synchronous pulley, a protective shell fixed to the heat dissipation pipe, and a motor fixed to the protective shell and driving the synchronous pulley to rotate. The number of synchronous pulleys, the number of rotating columns, and the number of baffles are all equal and their positions correspond one-to-one. The synchronous belt is used to connect two synchronous pulleys.

[0019] By adopting the above technical solution, after the motor is working, it drives one of the synchronous pulleys to rotate, thereby causing the synchronous belt connected to the synchronous pulley, the other synchronous pulley connected to the synchronous belt, the rotating column connected to both synchronous pulleys, and the baffle connected to the rotating column to rotate, thus ensuring normal ventilation of the heat dissipation pipe or blocking the flow of air.

[0020] Furthermore, the storage box is equipped with a feeding assembly, and multiple transformer boxes are provided. The feeding assembly includes a water pump fixed on the storage box, a liquid supply pipe fixed and connected to the inlet end of the water pump, and a conveying main pipe connected to the liquid supply pipe and connected to the perfluorohexanone liquid storage location. The outlet end of the water pump is connected to the inside of the storage box. The number of transformer boxes, the number of water pumps, and the number of liquid supply pipes are all equal and their positions correspond one-to-one. Multiple liquid supply pipes are all fixedly connected to the conveying main pipe.

[0021] By adopting the above technical solution, after the water pump is working, the liquid at the perfluorohexanone liquid storage location is first discharged from the main delivery pipe to the supply pipe, then from the supply pipe to the water pump, and finally from the water pump to the storage tank for storage, so as to ensure normal fire extinguishing needs.

[0022] Furthermore, the connecting column is rotatably connected to the connecting plate.

[0023] By adopting the above technical solution, the friction between the connecting column and the adjusting plate is reduced because the connecting column and the adjusting plate are rotatably connected.

[0024] In summary, the present invention has the following beneficial effects: In this application, by setting up a liquid supply mechanism and a displacement mechanism, and replacing the dry powder with perfluorohexanone, on the one hand, perfluorohexanone quickly vaporizes and evaporates after extinguishing the fire, leaving no residue and not causing secondary damage to electrical equipment, eliminating the need for manual cleaning and reducing the labor intensity of workers; on the other hand, the mobile box being stationary or in motion will not affect the rotation of the nozzle, thereby ensuring the overall fire extinguishing effect and range. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a cross-sectional schematic diagram of an embodiment of the present invention used to highlight the internal structure of the heat sink; Figure 3 This is a cross-sectional schematic diagram of an embodiment of the present invention used to highlight the internal structure of the substation box; Figure 4 This is a cross-sectional schematic diagram of an embodiment of the present invention to highlight the internal structure of the connecting box; Figure 5 This is a cross-sectional schematic diagram illustrating the internal structure of the supply box in an embodiment of the present invention; Figure 6 This is a schematic diagram illustrating the connection structure between the connecting plate and the sliding block in an embodiment of the present invention; Figure 7 This is a cross-sectional schematic diagram of an embodiment of the present invention to highlight the internal structure of the mobile frame; Figure 8 yes Figure 2 Enlarged view of point A in the middle; Figure 9 yes Figure 4 Enlarged diagram of point B in the middle.

[0026] In the diagram: 1. Transformer box; 2. Mobile box; 3. Nozzle; 4. Liquid supply mechanism; 41. Rotating assembly; 411. Worm gear; 412. Worm; 413. First volute; 414. First impeller; 42. Rotating assembly; 421. Water supply pipe; 422. Telescopic pipe; 423. Water supply branch pipe; 424. Return branch pipe; 43. Liquid supply assembly; 431. Connecting box; 432. Storage box; 433. Supply box; 434. Suction pipe; 44. Suction assembly; 441. Sealing slider; 442. Sliding block; 443. Connecting plate; 444. Connecting column; 445. Adjusting plate; 45. Drive assembly; 451. Rotating rod; 452. Second volute; 453. Second impeller 454. Inlet tee; 455. Outlet tee; 46. Air supply assembly; 461. Air supply pipe; 462. Air delivery pipe; 463. Filter block; 5. Displacement mechanism; 51. Reciprocating screw; 52. Guide rod; 53. Third volute; 54. Third impeller; 6. Through hole; 7. Cavity; 8. Adjustment groove; 9. Filter plate; 10. Heat dissipation mechanism; 101. Heat dissipation assembly; 1011. Heat dissipation pipe; 1012. Baffle; 102. Transmission assembly; 1021. Rotating column; 1022. Synchronous pulley; 1023. Synchronous belt; 1024. Protective shell; 1025. Motor; 11. Feeding assembly; 111. Water pump; 112. Liquid supply pipe; 113. Conveying main pipe. Detailed Implementation

[0027] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] like Figure 1-9As shown in the illustration, this application discloses a prefabricated low-voltage transfer box for smart grids, including a transformer box 1, a liquid supply mechanism 4, a displacement mechanism 5, a heat dissipation mechanism 10, and a material supply assembly 11. The transformer box 1 houses transformers and high- and low-voltage switchgear. Both the transformers and the high- and low-voltage switchgear are electrically connected to the main circuit of the smart grid via dedicated terminals to ensure stable power transmission and distribution. Multiple transformer boxes 1 are provided. A fire alarm and a smoke detector are installed on the top of the inner wall of each transformer box 1, both electrically connected to an external control system, capable of real-time monitoring of fire conditions inside the box and issuing timely alarms. A movable box 2 is slidably disposed inside the transformer box 1, and multiple nozzles 3 are rotatably connected to the movable box 2. The liquid supply mechanism 4 supplies perfluorohexanone to the nozzles 3 while simultaneously driving the nozzles 3 to rotate. The displacement mechanism 5 drives the mobile box 2 to reciprocate, while the liquid supply mechanism 4 supplies perfluorohexanone liquid into the nozzle 3 and drives the nozzle 3 to rotate. The rotating nozzle 3 sprays out the perfluorohexanone liquid to extinguish the fire. In addition, the displacement mechanism 5 can drive the mobile box 2 to a fixed position, and the nozzle 3 rotates to extinguish the fire at the designated position. On the one hand, perfluorohexanone quickly vaporizes and evaporates after extinguishing the fire, leaving no residue and not causing secondary damage to electrical equipment. It does not require manual cleaning, reducing the labor intensity of the staff. On the other hand, whether the mobile box 2 is stationary or in motion, it will not affect the rotation of the nozzle 3, thus ensuring the overall fire extinguishing effect and range.

[0029] The liquid supply mechanism 4 includes a rotating assembly 41, a rotating component 42, a liquid supply assembly 43, a liquid extraction assembly 44, a driving assembly 45, and an air supply assembly 46. The rotating assembly 41 includes a worm gear 411, a worm 412, a first volute 413, and a first impeller 414. The worm gear 411 is fixedly sleeved on the nozzle 3, and the number of worm gears 411 is equal to the number of nozzles 3, with each corresponding to a different position. The worm 412 is rotatably installed in the movable box 2 and meshes with the worm gear 411. The worm 412 passes through the first volute 413 and is rotatably connected to it. The first volute 413 is fixed in the movable box 2. The first impeller 414 is disposed in the first volute 413 and is fixedly sleeved on the worm 412. The rotating assembly 42 includes a water supply pipe 421, a telescopic pipe 422, a water supply branch pipe 423, and a return branch pipe 424. The water supply pipe 421 is fixed in the movable box 2. The nozzle 3 passes through and is rotatably connected to the water supply pipe 421. The telescopic pipe 422 is connected to the water supply pipe 421. The water supply branch pipe 423 is connected to the first volute 413. The return branch pipe 424 is connected to the first volute 413. The water supply branch pipe 423 is equipped with a one-way valve that allows liquid to flow only from the water supply pipe 421 to the first volute 413. The ends of both the water supply branch pipe 423 and the return branch pipe 424 furthest from the first volute 413 are connected to the water supply pipe 421. The return branch pipe 424 is equipped with a one-way valve that allows liquid to flow only from the first volute 413 to the water supply pipe 421. Perfluorohexanone liquid is supplied to the telescopic pipe 422 through the liquid supply assembly 43. The liquid will be discharged into the nozzle 3 through the water supply pipe 421 to ensure normal fire extinguishing. On the other hand, the liquid will flow from the water supply pipe 421 to the water supply branch pipe 423, the first volute 413, and the return branch pipe 424 in sequence, and finally be discharged into the water supply pipe 421 through the return branch pipe 424. During this process, the liquid will drive the first impeller 414 to rotate, thereby causing the worm 412 connected to the first impeller 414, the worm wheel 411 meshing with the worm 412, and the nozzle 3 fixed to the worm wheel 411 to rotate, thereby ensuring the continuous rotation of the nozzle 3.

[0030] The liquid supply assembly 43 is used to supply perfluorohexanone liquid into the telescopic tube 422. The liquid supply assembly 43 includes a connecting box 431, a storage box 432, and a supply box 433. The connecting box 431 is fixed to the transformer box 1, and the inner wall of the transformer box 1 has a through hole 6 communicating with the connecting box 431. The storage box 432 is fixed to the bottom of the connecting box 431, and the supply box 433 is fixed inside the connecting box 431. The supply box 433 has a cavity 7, and the telescopic tube 422 communicates with the cavity 7. The liquid extraction tube 434 communicates with the cavity 7 and extends into the storage box 432. The liquid extraction assembly 44 includes a sealing slider 441, a sliding block 442, a connecting plate 443, a connecting column 444, and an adjusting plate 445. The sealing slider 441 is slidably disposed in the cavity 7. The sliding block 442 is disposed through the top of the cavity 7 and is slidably engaged. The sliding block 442 is fixed to the sealing slider 441. A connecting plate 443 is fixed to a sliding block 442, a connecting column 444 is mounted on the connecting plate 443, and an adjusting plate 445 is rotatably mounted inside a connecting box 431. An adjusting groove 8 is provided on the adjusting plate 445 to slide against the connecting column 444, and the adjusting groove 8 is eccentrically positioned with the adjusting plate 445. Rotating the adjusting plate 445 causes the adjusting groove 8 to slide against the connecting column 444, thereby raising and lowering the connecting column 444, the connecting plate 443 connected to the connecting column 444, the sliding block 442 connected to the connecting plate 443, and the sealing slider 441 connected to the sliding block 442. When the sealing slider 441 rises, the liquid in the storage box 432 is discharged into the cavity 7 through the suction pipe 434. When the sealing slider 441 falls, the liquid in the cavity 7 is discharged into the telescopic pipe 422, ensuring the normal fire extinguishing operation of the device.

[0031] The drive assembly 45 includes a rotating rod 451, a second volute 452, a second impeller 453, an inlet tee 454, and an outlet tee 455. The rotating rod 451 is rotatably connected to the connecting box 431. The rotating rod 451 also rotatably connects to the second volute 452. The rotating rod 451 is fixed and coaxially arranged with the adjusting plate 445. The second volute 452 is fixed to the connecting box 431. The second impeller 453 is fixedly sleeved on the rotating rod 451. The inlet tee 454 is fixed and connected to the second volute 452. A solenoid valve is installed at the end of the inlet tee 454 connected to the second volute 452, and the end of the inlet tee 454 away from the second volute 452 is connected to the municipal high-pressure water supply. A water outlet tee 455 is fixed and connected to the second volute 452. The end of the water outlet tee 455 away from the second volute 452 is connected to the municipal low-pressure pipeline. A one-way valve is installed on the end of the water outlet tee 455 connected to the second volute 452, allowing water to flow only through the second volute 452 to the municipal pipeline. Two cavities 7 are provided. The number of sealing sliders 441 is equal to the number of cavities 7, and their positions correspond one-to-one. The other sealing slider 441 is also fixed to the sliding block 442. The air supply assembly 46 includes an air supply pipe 461, an air delivery pipe 462, and a filter block 463. The air supply pipe 461 is connected to the other cavity 7, and a one-way valve is installed on the air supply pipe 461, allowing air to enter the cavity 7 only from the outside. The air delivery pipe 462 is connected to the other cavity 7. The filter block 463 is detachably connected to the air delivery pipe 462, and the filter block 463 and the air delivery pipe 462 are connected by threads. The gas supply pipe 462 is connected to the telescopic pipe 422. The gas supply pipe 462 is equipped with a one-way valve that allows air to be discharged only through the cavity 7 into the telescopic pipe 422. In the event of a fire, the solenoid valve at the end of the water inlet tee 454 connected to the second volute 452 is activated. Water from the municipal water pipe will flow from the water inlet tee 454 into the second volute 452, then from the second volute 452 to the water outlet tee 455, and finally from the water outlet tee 455 into the municipal pipeline. During this process, the second impeller 453, the rotating rod 451 connected to the second impeller 453, and the adjusting plate 445 connected to the rotating rod 451 all rotate to ensure the normal supply of perfluorohexanone liquid. In addition, during the lifting and lowering of the sliding block 442, the sealing slider 441 in another cavity 7 is also lifted and lowered. When the sealing slider 441 rises, outside air is discharged into the cavity 7 through the air supply pipe 461. When the sealing slider 441 falls, the air in the cavity 7 is discharged into the telescopic pipe 422 through the air supply pipe 462, and mixes with the liquid in the telescopic pipe 422. The liquid is then atomized, which improves the fire extinguishing effect.

[0032] The displacement mechanism 5 is mounted on the transformer box 1 and is used to drive the movable box 2 to reciprocate. The displacement mechanism 5 includes a reciprocating screw 51, a guide rod 52, a third volute 53, and a third impeller 54. The reciprocating screw 51 is rotatably mounted in both the transformer box 1 and the connecting box 431. The reciprocating screw 51 passes through the movable box 2 and is threadedly connected. The reciprocating screw 51 sequentially passes through the connecting box 431 and the third volute 53 and is rotatably connected. The guide rod 52 is fixed in both the transformer box 1 and the connecting box 431. During the reciprocating motion, if it deviates, the guide rod 52 passes through the movable box 2 and is slidably engaged. The third volute 53 is fixed to the connecting box 431, and the end of the water inlet tee 454 near the third volute 53 is connected to the third volute 53. The outlet tee 455 is connected to the third volute 53 at one end. The inlet tee 454 is equipped with a solenoid valve at one end connected to the third volute 53. The outlet tee 455 is equipped with a one-way valve at the other end connected to the third volute 53, ensuring that water can only flow through the third volute 53 to the municipal pipeline. The third impeller 54 is located inside the third volute 53 and is fixedly mounted on the reciprocating screw 51. When the solenoid valve on the end connecting the inlet tee 454 and the third volute 53 is turned on, water in the high-pressure water pipe is discharged from the inlet tee 454 into the third volute 53, then from the third volute 53 into the outlet tee 455, and finally from the outlet tee 455 into the low-pressure pipe. During this process, the water flow drives the third impeller 54 to rotate, which in turn causes the reciprocating screw 51 connected to the third impeller 54 to rotate, thus realizing the reciprocating motion of the movable box 2 threadedly connected to the reciprocating screw 51. Similarly, when the movable box 2 moves to the designated position and needs to be used for targeted fire extinguishing, the solenoid valve can be turned off, making it quite convenient to use.

[0033] A filter plate 9 is installed inside the transformer box 1, and a heat dissipation mechanism 10 is installed on the transformer box 1. The heat dissipation mechanism 10 includes a heat dissipation component 101 and a transmission component 102. The heat dissipation component 101 includes a heat dissipation pipe 1011 and a baffle 1012. The heat dissipation pipe 1011 is installed through and fixed to the transformer box 1, and the filter plate 9 is fixed inside the heat dissipation pipe 1011. The baffle 1012 is rotatably installed inside the heat dissipation pipe 1011. Two baffles 1012 are provided. When the electrical components inside the transformer box 1 are working normally, the transmission assembly 102 drives the baffle 1012 to rotate 90 degrees, so that the two baffles 1012 are in a horizontal state. At this time, the heat generated inside the transformer box 1 can be discharged through the heat dissipation pipe 1011. In addition, in the event of a fire, the transmission assembly 102 drives the baffle 1012 to rotate and reset. The baffle 1012 blocks the heat dissipation pipe 1011, thus isolating the transformer box 1 from the outside world, reducing the amount of air entering the transformer box 1, which helps to improve the fire extinguishing effect of the device.

[0034] The transmission assembly 102 drives the two baffles 1012 to rotate synchronously. The transmission assembly 102 includes a rotating column 1021, a synchronous pulley 1022, a synchronous belt 1023, a protective shell 1024, and a motor 1025. The rotating column 1021 is fixed to the baffle 1012 and passes through the heat dissipation pipe 1011, providing a rotatable connection. The synchronous pulley 1022 is fixedly sleeved on the rotating column 1021. The number of synchronous pulleys 1022, the number of rotating columns 1021, and the number of baffles 1012 are all equal and their positions correspond one-to-one. The synchronous belt 1023 connects the two synchronous pulleys 1022 and meshes with them. The protective shell 1024 is fixed to the heat dissipation pipe 1011, and the motor 1025 is fixed to the protective shell 1024 and drives the synchronous pulleys 1022 to rotate. After the motor 1025 starts working, it drives one of the synchronous pulleys 1022 to rotate, thereby causing the synchronous belt 1023 connected to the synchronous pulley 1022, the other synchronous pulley 1022 connected to the synchronous belt 1023, the rotating column 1021 connected to the two synchronous pulleys 1022, and the baffle 1012 connected to the rotating column 1021 to rotate, thereby ensuring that the heat dissipation pipe 1011 is properly ventilated or blocking the flow of air.

[0035] The feeding assembly 11 is mounted on the storage tank 432 and includes a water pump 111, a liquid supply pipe 112, and a conveying main pipe 113. The water pump 111 is fixed to the storage tank 432, and its discharge end is connected to the inside of the storage tank 432. The liquid supply pipe 112 is fixed and connected to the inlet end of the water pump 111. The conveying main pipe 113 is connected to the liquid supply pipe 112 and to the perfluorohexanone liquid storage location. The number of transformer boxes 1, the number of water pumps 111, and the number of liquid supply pipes 112 are all equal and their positions correspond one-to-one. Multiple liquid supply pipes 112 are fixedly connected to the conveying main pipe 113 (in this example, connecting fire protection facilities such as those in public places to the conveying main pipe 113 can expand the applicability of this device). After the water pump 111 starts working, the liquid in the perfluorohexanone liquid storage location is first discharged from the main delivery pipe 113 to the liquid supply pipe 112, then discharged from the liquid supply pipe 112 to the water pump 111, and finally discharged from the water pump 111 to the storage tank 432 for storage, so as to ensure normal fire extinguishing needs.

[0036] The connecting column 444 is rotatably connected to the connecting plate 443. Because the connecting column 444 is rotatably connected to the connecting plate 443, the friction between the connecting column 444 and the adjusting plate 445 is reduced.

[0037] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A prefabricated low-voltage transfer box for smart grids, comprising a transformer enclosure (1) for housing transformers and high- and low-voltage switchgear, characterized in that: The transformer box (1) has a movable box (2) slidably disposed inside it. Multiple nozzles (3) are rotatably connected to the movable box (2) through it. The transformer box (1) and the movable box (2) are jointly provided with a liquid supply mechanism (4) for supplying perfluorohexanone into the nozzles (3) and driving the nozzles (3) to rotate. The transformer box (1) is provided with a displacement mechanism (5) for driving the movable box (2) to move back and forth.

2. The prefabricated low-voltage transfer box for smart grids according to claim 1, characterized in that: The liquid supply mechanism (4) includes a rotating assembly (41) and a rotating assembly (42). The rotating assembly (41) includes a worm gear (411) fixedly sleeved on the nozzle (3), a worm (412) rotatably installed in the movable box (2) and meshing with the worm gear (411), a first volute (413) fixed in the movable box (2), and a first impeller (414) disposed in the first volute (413). The worm (412) passes through the first volute (413) and is rotatably connected. The first impeller (414) is fixedly sleeved on the worm (412). The number of worm gears (411) is equal to the number of nozzles (3) and their positions correspond one-to-one. The rotating assembly (42) includes a water supply pipe (421) fixed to the movable box (2), a telescopic pipe (422) connected to the water supply pipe (421), a water supply branch pipe (423) connected to the first volute (413), and a return branch pipe (424) connected to the first volute (413). The ends of the water supply branch pipe (423) and the return branch pipe (424) away from the first volute (413) are both connected to the water supply pipe (421). The water supply branch pipe (423) is equipped with a one-way valve that allows liquid to be discharged from the water supply pipe (421) into the first volute (413). The return branch pipe (424) is equipped with a one-way valve that allows liquid to be discharged from the first volute (413) into the water supply pipe (421). The nozzle (3) passes through the water supply pipe (421) and is rotatably connected. The liquid supply mechanism (4) also includes a liquid supply assembly (43) for supplying perfluorohexanone liquid into the telescopic pipe (422).

3. A pre-installed low-voltage transfer box for smart grids according to claim 2, characterized in that: The liquid supply assembly (43) includes a connection box (431) fixed on the transformer box (1), a storage box (432) fixed at the bottom of the connection box (431), and a supply box (433) fixed inside the connection box (431). The inner wall of the transformer box (1) is provided with a through hole (6) communicating with the connection box (431). The supply box (433) is provided with a cavity (7). The liquid supply assembly (43) also includes a liquid extraction pipe (434) communicating with the cavity (7). The liquid extraction pipe (434) extends into the storage box (432). The telescopic pipe (422) is communicating with the cavity (7). The liquid supply mechanism (4) further includes a liquid extraction component (44), a drive component (45), and a gas supply component (46). The liquid extraction component (44) includes a sealing slider (441) slidably disposed in the cavity (7), a sliding block (442) slidably disposed through the top of the cavity (7), a connecting plate (443) fixed on the sliding block (442), a connecting column (444) disposed on the connecting plate (443), and an adjusting plate (445) rotatably installed in the connecting box (431). The sliding block (442) is fixed to the sealing slider (441), and the adjusting plate (445) is provided with an adjusting groove (8) slidably disposed with the connecting column (444). The adjusting groove (8) and the adjusting plate (445) are eccentrically disposed.

4. A pre-installed low-voltage transfer box for smart grids according to claim 3, characterized in that: The drive assembly (45) includes a rotating rod (451) that passes through and is rotatably connected to the connecting box (431), and a second volute (452) fixed to the connecting box (431). The rotating rod (451) passes through and is rotatably connected to the second volute (452). The rotating rod (451) is fixed and coaxially arranged with the adjusting plate (445). The drive assembly (45) also includes a second impeller (453) fixedly sleeved on the rotating rod (451) and a water inlet tee (454) fixedly connected to and communicating with the second volute (452). A water outlet tee (455) is fixed and connected to the second volute (452). A solenoid valve is provided on one end of the water inlet tee (454) connected to the second volute (452). The end of the water inlet tee (454) away from the second volute (452) is connected to the municipal high-pressure water supply. The end of the water outlet tee (455) away from the second volute (452) is connected to the municipal low-pressure pipeline. A one-way valve is provided on the end of the water outlet tee (455) connected to the second volute (452) so that water can only flow from the second volute 452 to the municipal pipeline. Two cavities (7) are provided. The number of sealing sliders (441) is equal to the number of cavities (7) and their positions correspond one-to-one. The other sealing slider (441) is also fixed to the sliding block (442). The air supply assembly (46) includes an air supply pipe (461) connected to the other cavity (7), an air delivery pipe (462) connected to the other cavity (7), and a filter block (463) detachably connected to the air delivery pipe (462). The air delivery pipe (462) is connected to the telescopic pipe (422). The air supply pipe (461) is provided with a one-way valve that allows air to enter the cavity (7) from the outside. The air delivery pipe (462) is provided with a one-way valve that allows air to be discharged from the cavity (7) to the telescopic pipe (422).

5. A pre-installed low-voltage transfer box for smart grids according to claim 4, characterized in that: The displacement mechanism (5) includes a reciprocating screw (51) rotatably mounted in the transformer box (1) and the connecting box (431), a guide rod (52) fixed in the transformer box (1) and the connecting box (431), a third volute (53) fixed on the connecting box (431), and a third impeller (54) disposed in the third volute (53). The reciprocating screw (51) passes through the moving box (2) and is threadedly connected. The guide rod (52) passes through the moving box (2) and is slidably engaged. The reciprocating screw (51) passes through the connecting box (431) and the third volute (53) in sequence. The volute (53) is rotatably connected, the third impeller (54) is fixedly sleeved on the reciprocating screw (51), the end of the inlet tee (454) near the third volute (53) is connected to the third volute (53), the end of the outlet tee (455) near the third volute (53) is connected to the third volute (53), the end of the inlet tee (454) connected to the third volute (53) is equipped with a solenoid valve, and the end of the outlet tee (455) connected to the third volute (53) is equipped with a one-way valve that allows water to flow only through the third volute (53) to the municipal pipeline.

6. A pre-installed low-voltage transfer box for smart grids according to claim 1, characterized in that: The transformer box (1) is provided with a filter plate (9) and a heat dissipation mechanism (10) is provided on the transformer box (1). The heat dissipation mechanism (10) includes a heat dissipation component (101). The heat dissipation component (101) includes a heat dissipation pipe (1011) that is installed through the transformer box (1) and fixed thereon, and two baffles (1012) that are rotatably installed in the heat dissipation pipe (1011). The filter plate (9) is fixed in the heat dissipation pipe (1011). The heat dissipation mechanism (10) also includes a transmission component (102) for driving the two baffles (1012) to rotate synchronously.

7. A prefabricated low-voltage transfer box for smart grids according to claim 6, characterized in that: The transmission assembly (102) includes a rotating column (1021) fixed on a baffle (1012). The rotating column (1021) passes through the heat dissipation pipe (1011) and is rotatably connected. The transmission assembly (102) also includes a synchronous pulley (1022) fixedly sleeved on the rotating column (1021), a synchronous belt (1023) meshing with the synchronous pulley (1022), a protective shell (1024) fixed on the heat dissipation pipe (1011), and a motor (1025) fixed on the protective shell (1024) and driving the synchronous pulley (1022) to rotate. The number of synchronous pulleys (1022), the number of rotating columns (1021), and the number of baffles (1012) are all equal and their positions correspond one-to-one. The synchronous belt (1023) is used to connect two synchronous pulleys (1022).

8. A pre-installed low-voltage transfer box for smart grids according to claim 3, characterized in that: The storage box (432) is provided with a feeding assembly (11), and the transformer box (1) is provided with multiple feeding assemblies. The feeding assembly (11) includes a water pump (111) fixed on the storage box (432), a liquid supply pipe (112) fixed and connected to the feed end of the water pump (111), and a conveying main pipe (113) connected to the liquid supply pipe (112) and connected to the perfluorohexanone liquid storage location. The discharge end of the water pump (111) is connected to the inside of the storage box (432). The number of transformer boxes (1), the number of water pumps (111), and the number of liquid supply pipes (112) are all equal and their positions correspond one-to-one. Multiple liquid supply pipes (112) are all fixedly connected to the conveying main pipe (113).

9. A pre-installed low-voltage transfer box for smart grids according to claim 3, characterized in that: The connecting column (444) is rotatably connected to the connecting plate (443).

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