New energy buried box-type substation with overload protection

Abstract

The present application belongs to the technical field of buried box-type substations, in particular to a new energy buried box-type substation with overload prevention, comprising a buried shell, the sidewall of the buried shell is connected with an overload-prevention new energy distribution box through a lifting assembly, further comprising: a raft plate arranged below the buried shell, a plurality of polyurethane elastic pads are fixedly connected between the raft plate and the buried shell. The present application can disperse the soil pressure received by the box body by relying on the raft plate, buffer and absorb the uneven stress generated by soil settlement by means of the buffer deformation characteristics of the polyurethane elastic pad, enhance the connection stability of the box body and the foundation through the supporting pile, effectively avoid the problems of box body deformation, cracking and equipment connection structure damage caused by soil settlement; and additionally add an adjusting cylinder, an adjusting bolt and a supporting seat between the buried shell and the raft plate, accurately adjust the height of the buried shell through the adjusting bolt, realize flexible correction of the levelness of the box body, and ensure long-term stable operation of the equipment.

Description

Technical Field

[0001] This invention belongs to the technical field of underground box-type substations, and in particular relates to an overload-resistant underground box-type substation for new energy. Background Technology

[0002] With the acceleration of urbanization and the upgrading of power systems, urban core areas, densely populated residential areas, and commercial complexes have placed increasingly higher demands on the space occupied, aesthetics, and environmental adaptability of power supply equipment. Although traditional ground-mounted box-type substations have advantages such as high integration and convenient installation, they also have drawbacks such as large footprint, significant visual interference, and susceptibility to external environmental factors (such as extreme weather, external impacts, and electromagnetic radiation concerns). They are unable to meet the development requirements of "low-carbon, compact, and concealed" in modern urban planning. Against this backdrop, underground box-type substations have emerged. Their core is to integrate core electrical equipment such as transformers, switchgear, and control and protection devices into an underground box structure, with only necessary heat dissipation devices and operating interfaces exposed above ground. This effectively saves ground space, improves the harmony of the urban landscape, and reduces the interference of the external environment on equipment operation. For example, a waterproof and seepage-resistant structure for an underground box-type substation is proposed in patent publication number CN115173295B.

[0003] Because there is no natural convection ventilation underground, the heat generated by transformers and switchgear during operation can easily accumulate inside the box, forming the so-called "heat island effect". Moreover, underground space is limited, and heat dissipation devices need to be compactly integrated. It is not possible to install large-area heat sinks like in above-ground substations. If a forced cooling system is used, the equipment temperature will quickly exceed the standard once the system fails. In addition, the special underground environment makes it more troublesome to maintain these heat dissipation devices.

[0004] In addition, the normal operation of underground prefabricated substations also faces the challenges posed by geological conditions. Especially in areas with loose soil, the soil is prone to subsidence. Soil subsidence will bring uneven external forces to the underground prefabricated box, which will cause the box to deform and crack over time. This structural damage will not only destroy the sealing of the box, but also affect the connection structure of the internal equipment, leading to unstable equipment operation. In severe cases, it may even cause power failures such as short circuits and tripping, posing a threat to the safe operation of the power grid.

[0005] Therefore, an overload-resistant underground prefabricated substation for new energy sources is proposed to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned problems by providing an overload-resistant underground prefabricated substation for new energy sources.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an overload-resistant underground prefabricated substation for new energy, comprising an underground shell, wherein the side wall of the underground shell is connected to an overload-resistant new energy distribution box via a lifting assembly, and further comprising:

[0008] A raft slab is disposed below the underground shell, and multiple polyurethane elastic pads are fixedly connected between the raft slab and the underground shell. Multiple support piles are fixedly connected to the lower side wall of the raft slab.

[0009] A heat dissipation component is installed on the outer wall of the overload protection new energy distribution box to reduce the temperature inside the overload protection new energy distribution box;

[0010] A drainage assembly, located inside the underground shell, is used to pump out water that has seeped into the underground shell.

[0011] Preferably, the lifting assembly includes two threaded rods rotatably connected to the inner wall of the underground shell. A threaded cylinder is threaded onto the rod wall of each threaded rod. Two lifting motors are fixedly connected to the upper side wall of the underground shell. The output ends of the two lifting motors are respectively connected to the upper ends of the two threaded rods. Connecting blocks are fixedly connected to the side walls of the two threaded cylinders on opposite sides. A common lifting plate is fixedly connected to the side walls of the two connecting blocks on opposite sides. The overload protection new energy distribution box is fixedly connected to the upper side wall of the lifting plate. An opening matching the overload protection new energy distribution box is provided on the upper side wall of the underground shell.

[0012] Preferably, the heat dissipation assembly includes a mounting box fixedly connected to the upper side wall of the overload protection new energy distribution box. The left and right sides of the mounting box are open structures. A water tank is fixedly connected to the inner wall of the mounting box. Multiple semiconductor cooling plates are inserted into the upper side wall of the water tank. The cooling ends of the multiple semiconductor cooling plates are located inside the water tank and in contact with the refrigerant in the water tank. The heat dissipation ends of the multiple semiconductor cooling plates extend out of the water tank. A cooling pipe with a serpentine structure is fixedly connected to the rear side wall of the overload protection new energy distribution box. A water pump is fixedly connected to the upper side wall of the lifting plate. The water inlet of the water pump is connected to the lower end of the cooling pipe. The water outlet of the water pump is connected to a delivery pipe. The upper end of the delivery pipe is connected to the water tank. Expansion components are connected to both the left and right sides of the overload protection new energy distribution box.

[0013] Preferably, the expansion assembly includes mounting slots on the left and right sides of the overload-proof new energy distribution box. A support plate is fixedly connected to the inner wall of the mounting slot. Multiple rotating rods are rotatably connected to the support plate and the side wall of the mounting slot on the opposite side. A heat dissipation plate is fixedly connected to the rod wall of each rotating rod. Multiple heat-conducting seats that match the rotating rods are fixedly connected to the wall of the mounting slot. The upper ends of the multiple rotating rods extend out of the support plate, and adjacent rotating rods are connected by a belt pulley transmission mechanism. An expansion motor is fixedly connected to the wall of the mounting slot, and the output end of the expansion motor is fixedly connected to the upper end of one of the rotating rods.

[0014] Preferably, the drainage assembly includes a support frame fixedly connected to the inner wall of the lower side of the buried shell. A pumping pipe and a drain pipe are fixedly inserted into the side wall of the support frame. The inlet end of the water pump is fixedly connected to a vertical pipe. The upper ends of both the pumping pipe and the drain pipe are fixedly connected to inserts. The vertical pipe and the delivery pipe are both adapted to the inserts. A first control valve and a second control valve are provided in the delivery pipe. The outlet end of the water pump is located between the first control valve and the second control valve. A third control valve is provided in the vertical pipe. A fourth control valve is provided in the cooling pipe.

[0015] Preferably, an adjusting cylinder is inserted at each of the four corners of the lower side wall of the buried shell, and an adjusting bolt is threaded into the adjusting cylinder. The lower end of the adjusting bolt is fixedly connected to a support base through a pressure sensor. An inspection port is opened on the lower side wall of the overload-proof new energy distribution box, and a baffle covering the inspection port is bolted to the lower side wall of the overload-proof new energy distribution box.

[0016] Preferably, a plurality of fans located above the semiconductor cooling plate are fixedly connected to the upper inner wall of the mounting box, and a heat insulation cover is fixedly connected to the upper side wall of the mounting box.

[0017] Preferably, the size of the mounting box is larger than the size of the passage, and the lower side wall of the mounting box has an opening adapted to the lifting motor.

[0018] Compared with existing technologies, the advantages of an overload-resistant underground prefabricated substation for new energy sources are:

[0019] 1. By installing a raft slab, polyurethane elastic pads, support piles, adjusting cylinders, adjusting bolts, and support seats, the buried box-type substation in areas with loose soil can distribute the soil pressure on the box body, and the buffer deformation characteristics of the polyurethane elastic pads can buffer and absorb the uneven stress caused by soil settlement. The support piles enhance the connection stability between the box body and the foundation, effectively avoiding box body deformation, cracking, and equipment connection structure damage caused by soil settlement. In addition, the addition of adjusting cylinders, adjusting bolts, and support seats between the buried shell and the raft slab allows for precise adjustment of the height of the buried shell through adjusting bolts, enabling flexible correction of the box body's levelness and ensuring long-term stable operation of the equipment.

[0020] 2. By using water cooling through the heat dissipation and expansion components, the underground box-type substation can efficiently remove the heat generated by the operation of transformers and switchgear in the limited underground enclosed space. The water cooling system is compact and easy to integrate, without taking up too much additional installation space. When the water cooling system fails, the distribution box can be extended above ground to expand the heat dissipation area. It can rely on the natural convection environment of the ground to achieve passive heat dissipation, promptly curbing the equipment temperature rise from exceeding the standard. At the same time, the ground environment facilitates the inspection and maintenance of the heat dissipation structure and faulty components by the staff, greatly reducing the difficulty of underground operations and ensuring the continuous and stable operation of the substation.

[0021] 3. The drainage components can promptly drain water accumulated in the underground enclosure due to condensation, leakage, etc., which can prevent long-term water retention from causing corrosion of internal metal parts and short circuits in electrical components. At the same time, it can prevent water accumulation from affecting the heat exchange efficiency of the heat dissipation components and damaging the stability of the equipment connection structure, fundamentally reducing the potential equipment operation hazards caused by water accumulation and ensuring the safe and stable operation of the substation in the underground enclosed environment. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of an overload-resistant underground box-type substation for new energy provided by the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the underground shell in a new energy underground box-type substation with overload protection provided by the present invention.

[0024] Figure 3 This is a schematic diagram showing the positional relationship between the regulating cylinder and the regulating bolt in a new energy underground box-type substation for overload protection provided by the present invention;

[0025] Figure 4 This is a structural schematic diagram of a lifting component in a new energy underground box-type substation with overload protection provided by the present invention;

[0026] Figure 5This is a schematic diagram of the drainage component in a new energy underground box-type substation with overload protection provided by the present invention;

[0027] Figure 6 This is a schematic diagram of the expansion component in an overload-resistant underground box-type substation for new energy provided by the present invention;

[0028] Figure 7 This is a schematic diagram of the cooperation method between the transfer rod and the heat conduction seat in an overload-proof underground box-type substation for new energy provided by the present invention.

[0029] Figure 8 This is a schematic diagram of the heat dissipation component in a new energy underground box-type substation with overload protection provided by the present invention.

[0030] In the diagram: 1. Buried shell, 2. Overload-proof new energy distribution box, 3. Raft, 4. Polyurethane elastic pad, 5. Support pile, 6. Lifting assembly, 61. Threaded rod, 62. Threaded cylinder, 7. Lifting motor, 8. Connecting block, 9. Lifting plate, 10. Through port, 11. Heat dissipation assembly, 111. Mounting box, 112. Water tank, 12. Semiconductor refrigeration plate, 13. Refrigeration pipe, 14. Water pump, 15. Delivery pipe, 16. Expansion assembly, 161. Mounting groove, 162. Support plate, 17. Rotating rod, 18. Heat dissipation plate, 19. Heat conduction seat, 20. Expansion motor, 21. Drainage assembly, 211. Support frame, 212. Pumping pipe, 22. Discharge pipe, 23. Vertical pipe, 24. Insert cylinder, 25. First control valve, 26. Second control valve, 27. Third control valve, 28. Fourth control valve, 29. Adjusting cylinder, 30. Adjusting bolt, 31. Support seat, 32. Baffle, 33. Fan, 34. Heat insulation cover, 35. Opening. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] like Figures 1-8 As shown, an overload-resistant underground prefabricated substation for new energy includes an underground shell 1. An overload-resistant new energy distribution box 2 is connected to the side wall of the underground shell 1 via a lifting assembly 6. The lifting assembly 6 includes two threaded rods 61 rotatably connected to the inner wall of the underground shell 1. Threaded cylinders 62 are threaded onto the rod walls of the threaded rods 61. Two lifting motors 7 are fixedly connected to the upper side wall of the underground shell 1. The output ends of the two lifting motors 7 are respectively connected to the upper ends of the two threaded rods 61. Connecting blocks 8 are fixedly connected to the side walls of the two threaded cylinders 62 on opposite sides. A common lifting plate 9 is fixedly connected to the side walls of the two connecting blocks 8 on opposite sides. The overload-resistant new energy distribution box 2 is fixedly connected to the upper side wall of the lifting plate 9. The upper side wall of the underground shell 1 has a passageway 10 that matches the overload-resistant new energy distribution box 2. The substation also includes:

[0033] A raft slab 3 is located below the underground shell 1. Multiple polyurethane elastic pads 4 are fixedly connected between the raft slab 3 and the underground shell 1. Multiple support piles 5 are fixedly connected to the lower side wall of the raft slab 3. Adjusting cylinders 29 are inserted into the four corners of the lower side wall of the underground shell 1. Adjusting bolts 30 are connected to the internal threads of the adjusting cylinders 29. The lower end of the adjusting bolts 30 is fixedly connected to the support base 31 through a pressure sensor. An inspection port is opened on the lower side wall of the overload-proof new energy distribution box 2. A baffle 32 covering the inspection port is bolted to the lower side wall of the overload-proof new energy distribution box 2.

[0034] A heat dissipation assembly 11 is installed on the outer wall of the overload protection new energy distribution box 2. The heat dissipation assembly 11 includes a mounting box 111 fixedly connected to the upper side wall of the overload protection new energy distribution box 2. The left and right sides of the mounting box 111 are open structures. The size of the mounting box 111 is larger than the size of the passage 10. The lower side wall of the mounting box 111 has an opening 35 adapted to the lifting motor 7. A water tank 112 is fixedly connected to the inner wall of the mounting box 111. Multiple semiconductor cooling plates 12 are inserted into the upper side wall of the water tank 112. Multiple fans 33 located above the semiconductor refrigeration plates 12 are fixedly connected to the upper inner wall of the mounting box 111. A heat insulation cover 34 is fixedly connected to the upper wall of the mounting box 111. The cooling ends of the multiple semiconductor refrigeration plates 12 are located inside the water tank 112 and are in contact with the refrigerant inside the water tank 112. The heat dissipation ends of the multiple semiconductor refrigeration plates 12 extend out of the water tank 112. A refrigeration pipe 13 with a serpentine structure is fixedly connected to the rear wall of the overload-proof new energy distribution box 2. The upper wall of the lifting plate 9 is fixedly connected to... A water pump 14 is provided, with its inlet end connected to the lower end of the cooling pipe 13 and its outlet end connected to a delivery pipe 15. The upper end of the delivery pipe 15 is connected to a water tank 112. Expansion components 16 are connected to both the left and right sides of the overload protection new energy distribution box 2. Each expansion component 16 includes mounting slots 161 formed on the left and right sides of the overload protection new energy distribution box 2. A support plate 162 is fixedly connected to the inner wall of the mounting slot 161. Multiple support plates 162 are rotatably connected to the side walls of the support plate 162 and the mounting slot 161 on opposite sides. A rotating rod 17 has a heat dissipation plate 18 fixedly connected to its wall. A plurality of heat-conducting seats 19 that match the rotating rod 17 are fixedly connected to the wall of the mounting groove 161. The upper ends of the plurality of rotating rods 17 extend out of the support plate 162, and adjacent rotating rods 17 are connected by a belt pulley transmission mechanism. An expansion motor 20 is fixedly connected to the wall of the mounting groove 161. The output end of the expansion motor 20 is fixedly connected to the upper end of one of the rotating rods 17 to reduce the temperature inside the overload-proof new energy distribution box 2.

[0035] Drainage assembly 21 is installed inside the underground shell 1. Drainage assembly 21 includes a support frame 211 fixedly connected to the lower inner wall of the underground shell 1. A pumping pipe 212 and a discharge pipe 22 are fixedly inserted into the side wall of the support frame 211. The inlet end of the water pump 14 is fixedly connected to a vertical pipe 23. The upper ends of the pumping pipe 212 and the discharge pipe 22 are both fixedly connected to a plug 24. The vertical pipe 23 and the delivery pipe 15 are both adapted to the plug 24. A first control valve 25 and a second control valve 26 are provided in the delivery pipe 15. The outlet end of the water pump 14 is located between the first control valve 25 and the second control valve 26. A third control valve 27 is provided in the vertical pipe 23. A fourth control valve 28 is provided in the cooling pipe 13 for pumping out the water that has seeped into the underground shell 1.

[0036] The operating principle of this invention is explained as follows: When installing an overload-resistant underground box-type substation for new energy on a soft soil foundation, multiple support piles 5 are first poured in the area, and the length of the support piles 5 extends through the settlement layer to the bearing layer. Then, an integral raft slab 3 is poured at the upper end of the multiple support piles 5. Multiple polyurethane elastic pads 4 are installed on the surface of the raft slab 3. Then, the underground shell 1 is installed on top of the polyurethane elastic pads 4, so that the weight of the substation can be evenly transferred to the bearing layer, avoiding local settlement that could cause foundation cracking. When the raft slab 3 undergoes slight settlement deformation, the compression deformation of the polyurethane elastic pads 4 absorbs the soil settlement, offsetting the relative displacement between the underground shell 1 and the raft slab 3, preventing the raft slab 3 from directly bearing shear stress. The distance between the raft slab 3 and the support seat 31 will change, and the pressure sensor on the surface of the support seat 31 (not shown in the figure) will detect that the pressure on the support seat 31 has decreased. After the controller inside the overload-resistant new energy distribution box 2 detects this situation, the controller will inform the power personnel through the communication module.

[0037] Upon learning of the situation, the power personnel can arrive at the scene and send an electrical signal to the controller via a remote control switch. After receiving the signal, the controller will control the lifting motors 7 on both sides to operate. The lifting motors 7 will drive the threaded rod 61 to rotate. Through the threaded engagement, the threaded cylinder 62 will drive the lifting plate 9 to move upward through the connecting block 8. The lifting plate 9 will cause the overload protection new energy distribution box 2 to extend out of the ground. The power personnel can open the overload protection new energy distribution box 2 and the baffle 32 below it. They can then go down into the underground shell 1 through the inspection port and use tools such as wrenches to tighten the adjusting bolts 30 at the corresponding positions. Through the threaded engagement of the adjusting bolts 30 and the adjusting cylinder 29, the support base 31 will be moved downward to the appropriate position. When the pressure sensor above the support base 31 detects that the compressive force between the support base 31 and the raft plate 3 has returned to the corresponding value, the controller will issue a prompt sound to remind the power personnel, thereby accurately adjusting the level of the underground shell 1 and ensuring the stability of the equipment connection structure.

[0038] During substation operation, the controller operates multiple semiconductor cooling plates 12 to cool the refrigerant in the water tank 112. The controller also controls the water pump 14 and opens the second control valve 26 and the fourth control valve 28. The water pump 14 draws the refrigerant from the water tank 112 into the cooling pipe 13, which lowers the internal temperature of the overload protection new energy distribution box 2. The refrigerant carrying heat flows back to the water tank 112 through the delivery pipe 15 for recooling, thus cooling the overload protection new energy distribution box 2. If components such as the water pump 14 fail, the internal temperature of the overload protection new energy distribution box 2 will continue to rise. The controller detects the internal temperature using a temperature sensor (not shown in the diagram) inside the overload protection new energy distribution box 2. Once the set threshold (40℃) is exceeded, the controller will activate the lifting motors 7 on both sides. Based on the above principle, the overload protection new energy distribution box 2 will extend out of the ground. Furthermore, the controller will activate the expansion motors 20 on both sides. The expansion motors 20 will drive one of the rotating rods 17 to rotate. This rotating rod 17 will drive multiple rotating rods 17 to rotate through a belt pulley transmission mechanism (the belt pulley transmission mechanism includes a pulley sleeved on the outer wall of the rotating rod 17 and a belt sleeved on the outer side of two adjacent pulleys. When one rotating rod 17 rotates, it can drive other rotating rods 17 to rotate together through the pulley and belt). The rotating rod 17 will drive the heat sink 18 to open. The heat generated by the overload protection new energy distribution box 2 will be transferred to the heat sink 18 through the heat conduction seat 19 and the rotating rod 17, achieving passive heat dissipation by utilizing the natural convection environment, and promptly curbing the equipment temperature rise from exceeding the standard.

[0039] When the controller detects water entering the underground shell 1 through the liquid level sensor inside the underground shell 1 (liquid level sensor not shown in the figure), the controller will control the water pump 14 to work, and control the first control valve 25 and the third control valve 27 to open, while controlling the second control valve 26 and the fourth control valve 28 to close. The water pump 14 will pump out the water accumulated at the bottom of the underground shell 1 through the vertical pipe 23 and the pumping pipe 212, and discharge it to the ground through the delivery pipe 15 and the discharge pipe 22, thereby reducing the equipment operation hazards caused by water accumulation and ensuring the safe and stable operation of the substation in the underground closed environment.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An overload-resistant underground prefabricated substation for new energy, comprising an underground shell (1), wherein the side wall of the underground shell (1) is connected to an overload-resistant new energy distribution box (2) via a lifting assembly (6), characterized in that, Also includes: A raft slab (3) is located below the underground shell (1). Multiple polyurethane elastic pads (4) are fixedly connected between the raft slab (3) and the underground shell (1). Multiple support piles (5) are fixedly connected to the lower side wall of the raft slab (3). A heat dissipation component (11) is installed on the outer wall of the overload protection new energy distribution box (2) to reduce the temperature inside the overload protection new energy distribution box (2); A drainage assembly (21) is provided inside the underground shell (1) for pumping out water that has seeped into the underground shell (1); The heat dissipation component (11) includes a mounting box (111) fixedly connected to the upper side wall of the overload protection new energy distribution box (2). The left and right sides of the mounting box (111) are open structures. A water tank (112) is fixedly connected to the inner wall of the mounting box (111). Multiple semiconductor cooling plates (12) are inserted into the upper side wall of the water tank (112). The cooling ends of the multiple semiconductor cooling plates (12) are located inside the water tank (112) and are in contact with the refrigerant inside the water tank (112). The heat dissipation ends of the multiple semiconductor cooling plates (12) extend out of the water tank (112). A cooling pipe (13) is fixedly connected to the rear side wall of the overload protection new energy distribution box (2). The cooling pipe (13) has a serpentine structure. Expansion components (16) are connected to both the left and right sides of the overload protection new energy distribution box (2). The expansion component (16) includes mounting slots (161) on the left and right sides of the overload-proof new energy distribution box (2). A support plate (162) is fixedly connected to the inner wall of the mounting slot (161). Multiple rotating rods (17) are rotatably connected to the side wall of the support plate (162) and the mounting slot (161) on opposite sides. A heat dissipation plate (18) is fixedly connected to the rod wall of the rotating rod (17). Multiple heat-conducting seats (19) that match the rotating rods (17) are fixedly connected to the groove wall of the mounting slot (161). The upper ends of the multiple rotating rods (17) extend out of the support plate (162), and two adjacent rotating rods (17) are connected by a belt pulley transmission mechanism. An expansion motor (20) is fixedly connected to the groove wall of the mounting slot (161). The output end of the expansion motor (20) is fixedly connected to the upper end of one of the rotating rods (17).

2. The overload-resistant underground prefabricated substation for new energy sources according to claim 1, characterized in that, The lifting assembly (6) includes two threaded rods (61) rotatably connected to the inner wall of the underground shell (1). The rod wall of the threaded rod (61) is threaded with a threaded cylinder (62). The upper side wall of the underground shell (1) is fixedly connected to two lifting motors (7). The output ends of the two lifting motors (7) are respectively connected to the upper ends of the two threaded rods (61). The side walls of the two threaded cylinders (62) on opposite sides are fixedly connected to a connecting block (8). The side walls of the two connecting blocks (8) on opposite sides are fixedly connected to the same lifting plate (9). The overload protection new energy distribution box (2) is fixedly connected to the upper side wall of the lifting plate (9). The upper side wall of the underground shell (1) has a passage (10) that matches the overload protection new energy distribution box (2).

3. The overload-resistant underground prefabricated substation for new energy sources according to claim 2, characterized in that, A water pump (14) is fixedly connected to the upper side wall of the lifting plate (9). The water inlet of the water pump (14) is connected to the lower end of the cooling pipe (13). The water outlet of the water pump (14) is connected to a conveying pipe (15). The upper end of the conveying pipe (15) is connected to the water tank (112).

4. The overload-resistant underground prefabricated substation for new energy sources according to claim 3, characterized in that, The drainage assembly (21) includes a support frame (211) fixedly connected to the inner wall of the lower side of the underground shell (1). A pumping pipe (212) and a discharge pipe (22) are fixedly inserted into the side wall of the support frame (211). A vertical pipe (23) is fixedly connected to the inlet end of the water pump (14). A tube (24) is fixedly connected to the upper end of both the pumping pipe (212) and the discharge pipe (22). The vertical pipe (23) and the delivery pipe (15) are both adapted to the tube (24). A first control valve (25) and a second control valve (26) are provided in the delivery pipe (15). The outlet end of the water pump (14) is located between the first control valve (25) and the second control valve (26). A third control valve (27) is provided in the vertical pipe (23). A fourth control valve (28) is provided in the refrigeration pipe (13).

5. The overload-resistant underground prefabricated substation for new energy sources according to claim 1, characterized in that, Adjusting cylinders (29) are inserted into the four corners of the lower side wall of the buried shell (1). Adjusting bolts (30) are threaded into the adjusting cylinders (29). The lower end of the adjusting bolts (30) is fixedly connected to a support base (31) through a pressure sensor. The lower side wall of the overload-proof new energy distribution box (2) is provided with an inspection port, and the lower side wall of the overload-proof new energy distribution box (2) is bolted to a baffle (32) covering the inspection port.

6. The overload-resistant underground prefabricated substation for new energy sources according to claim 3, characterized in that, The upper inner wall of the mounting box (111) is fixedly connected to a plurality of fans (33) located above the semiconductor cooling plate (12), and the upper inner wall of the mounting box (111) is fixedly connected to a heat insulation cover (34).

7. An overload-resistant underground prefabricated substation for new energy sources according to claim 3, characterized in that, The size of the mounting box (111) is larger than the size of the through opening (10), and the lower side wall of the mounting box (111) has an opening (35) adapted to the lifting motor (7).

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