Photovoltaic power box-type substation with prefabricated assembly foundation

Abstract

The present application relates to the technical field of box-type substation, and discloses a photovoltaic power box-type substation with prefabricated assembly foundation, which comprises a base, a box arranged on the base, an air inlet unit arranged on the base and matched with the box, an air outlet unit arranged on the box, a closed control unit arranged on the box, and an overhead ventilation unit arranged on the box. The present application forms a bottom air supply and heat dissipation path by cooperating the ventilation interlayer with the air duct, and the fan blades are rotated by wind force. The spiral flow guide vanes accelerate the outward exhaust, the equipment in the box is fully cooled from the bottom to the outside, the opening and closing of the control wind deflector and the sealing piece are controlled, the flow guide slope and the flow guide block are matched, the equipment is fully cooled at high temperature, the internal condensation, water accumulation and corrosion problems are prevented at low temperature to protect the internal electrical elements, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] This invention relates to the technical field of prefabricated substations, and more particularly to a photovoltaic power prefabricated substation with a prefabricated assembly foundation. Background Technology

[0002] Photovoltaic prefabricated substations are the core electrical equipment for the conversion and transmission of photovoltaic power plants. They are typically deployed outdoors, facing complex conditions such as high temperature, high humidity, large diurnal temperature variations, rainwater accumulation, and wind and sand erosion. Existing technologies compress the air entering the substation by controlling the size of the air inlet and outlet to accelerate airflow and improve convective heat transfer. However, the bottom of the substation is completely flush with the top of the foundation, creating a sealed environment with no ventilation space. In outdoor environments with fluctuating diurnal temperatures, condensation and moisture easily form at the bottom of the substation. This moisture cannot be discharged in time and gradually seeps into the high and low voltage switchgear, transformers, instrument transformers, and other core electrical components inside the substation. This causes a decline in the insulation performance of the equipment, corrosion of metal parts, and short circuits, significantly reducing the service life of the substation. Furthermore, when the photovoltaic substation operates at full load during the day, the transformer and switchgear generate a large amount of heat. Existing technologies rely on passive cooling methods, such as opening air inlets and outlets on the side walls of the substation and using cooling fans or heat sinks on the top, which cannot effectively dissipate the heat accumulated at the bottom of the photovoltaic substation. Especially in the high-temperature environment of summer, the sealed bottom of the enclosure accumulates heat, which can easily cause the internal temperature of the equipment to exceed the standard, triggering the high-temperature protection and causing power generation interruption. Summary of the Invention

[0003] Given the existing technology's problems such as alternating day and night temperature differences in outdoor environments, which easily lead to condensation and moisture accumulation at the bottom of the enclosure, preventing timely moisture removal, and the high temperatures in summer causing heat buildup at the sealed bottom of the enclosure, which can easily lead to excessive internal temperatures, triggering high-temperature protection and causing power generation interruptions, a photovoltaic power box-type substation with a prefabricated assembled foundation is proposed.

[0004] The technical solution of the present invention is as follows: a photovoltaic power box-type substation with a prefabricated assembly foundation, comprising a base, a box body mounted on the base, an air inlet unit mounted on the base and cooperating with the box body, an exhaust unit mounted on the box body, a closed control unit mounted on the box body, and an overhead ventilation unit mounted on the box body; the base is provided with guide slopes on both sides corresponding to the air ducts, and guide blocks are provided on the guide slopes; the air inlet unit includes air ducts mounted on both sides of the box body, a guide assembly mounted on the bottom of the box body and cooperating with the air ducts, a transmission belt mounted on the guide assembly, and a locking assembly mounted on the box body and cooperating with the transmission belt; the exhaust unit includes an exhaust duct mounted on the top of the box body, an extraction assembly mounted on the exhaust duct, and a sealing assembly mounted on the box body and cooperating with the exhaust duct.

[0005] Furthermore, the air guiding assembly includes a fixed block disposed at the bottom of the inner wall of the box, multiple sets of air guiding plates disposed on the fixed block, a connecting wheel 1 disposed on the air guiding plate, a drive shaft disposed on the fixed block, a connecting wheel 2 disposed on the drive shaft, and a drive belt 2 disposed on the drive shaft and the connecting wheel 2; the fixed block has an active cavity that cooperates with the drive belt 2; the drive shaft is provided with a connecting wheel 3 that cooperates with the drive belt 1.

[0006] Furthermore, the air guide plate has grooves and protrusions that cooperate with each other on both sides, and the fixing block has stop block one and stop block three that cooperate with the grooves and protrusions on both sides.

[0007] Furthermore, the locking assembly includes a movable block disposed on the housing, a movable groove disposed on the housing that engages with the movable block, a stop spring having its two ends abutting against the movable block and the movable groove respectively, and a stop block disposed on the movable block; the stop block is provided with a snap-fit ​​surface that engages with the transmission belt.

[0008] Furthermore, the enclosure control unit includes an electric push rod mounted on the housing, a movable plate mounted on the output end of the electric push rod and slidably mounted on the housing, a first drive component mounted on the movable plate to cooperate with the enclosure assembly, and a second drive component mounted on the movable plate to cooperate with the movable block.

[0009] Furthermore, the second driving component includes an extrusion block disposed on the movable plate and a toothed plate disposed on the movable plate; the movable block is provided with an inclined surface, and the extrusion block is provided with an arc surface that mates with the inclined surface.

[0010] Furthermore, the exhaust assembly includes a rotating drum mounted on the exhaust duct, fan blades mounted on the rotating drum, an exhaust groove mounted on the rotating drum, a fixing rod mounted on the rotating drum, and spiral guide vanes mounted on the fixing rod.

[0011] Furthermore, the enclosure assembly includes a fixed plate 1 disposed at the exhaust duct port, multiple sealing plates disposed on the fixed plate 1, a fixed plate 2 disposed on the fixed plate 1, and a rotating gear plate disposed on the fixed plate 2; the fixed plate 1 is provided with a telescopic groove that mates with the sealing plate; the sealing plate is provided with a limit block and a drive block, the fixed plate 2 is provided with a limit groove that mates with the limit block, and the rotating gear plate is provided with a drive groove that mates with the drive block; the fixed plate 2 is provided with a connecting groove 1, and the rotating gear plate is provided with a connecting groove 2, and the connecting groove 1 and the connecting groove 2 are connected.

[0012] Furthermore, the driving component includes a gear 1 mounted on the housing and engaging with a rotating gear disk, a gear 2 mounted on the gear 1, and a gear 3 mounted on the housing and engaging with the gear 2; the gear 3 is provided with a connecting rod, the connecting rod is provided with a helical groove, the movable plate is provided with a fixing sleeve, and the fixing sleeve is provided with a helical protrusion engaging with the helical groove.

[0013] Furthermore, the overhead ventilation unit includes a double-layer fixed plate on the housing, a ventilation interlayer formed on the double-layer fixed plate, ventilation holes on the double-layer fixed plate connecting the ventilation interlayer, and a moisture-proof pad layer on the ventilation interlayer.

[0014] The beneficial effects of this invention are as follows: This invention forms a bottom air supply and heat dissipation path by combining a ventilation interlayer with an air duct. At the same time, the fan blades are rotated by the wind, and the spiral guide vanes accelerate the exhaust to the outside, realizing comprehensive heat dissipation of the equipment inside the box from the bottom to the outside. By controlling the opening and closing of the air guide plate and sealing plate, combined with the guide slope and guide block, heat dissipation is fully achieved at high temperatures, and at low temperatures, condensation, water accumulation and corrosion problems are prevented inside, protecting the internal electrical components and extending the service life of the equipment. At the same time, the ventilation interlayer combined with the moisture-proof pad at the bottom of the box, together with the air guide plate, forms a multi-protection structure of ventilation, dust prevention, insect prevention, and waterproof sealing, which can be adapted to various outdoor photovoltaic power station operating conditions such as high temperature, high humidity, wind and sand, and heavy rain. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the housing of the present invention; Figure 3 This is a schematic diagram of the structure of the drive component of the present invention; Figure 4 This is a schematic diagram of the structure of gear three of the present invention; Figure 5 This is a schematic diagram of the air extraction assembly of the present invention; Figure 6 This is a schematic cross-sectional view of the rotating drum of the present invention; Figure 7 This is an exploded view of the enclosed component of the present invention; Figure 8 This is a schematic diagram of the structure of the sealing sheet of the present invention; Figure 9 For the present invention Figure 2 Enlarged view of the structure at point A in the middle; Figure 10 This is a schematic diagram of the structure of the second driving component of the present invention; Figure 11 This is a schematic diagram of the structure of the movable block of the present invention; Figure 12 This is a cross-sectional structural diagram of the fixing block of the present invention; Figure 13 This is a schematic diagram of the air guide plate of the present invention; Figure 14 This is a cross-sectional structural diagram of the double-layer fixing plate of the present invention.

[0016] In the diagram: 1. Base; 11. Guide slope; 12. Guide block; 2. Housing; 3. Air inlet unit; 31. Air duct; 32. Air guide assembly; 321. Fixing block; 3211. Movable cavity; 3212. Baffle one; 3213. Baffle three; 322. Air guide plate; 3221. Groove; 3222. Protrusion; 323. Connecting wheel one; 324. Drive shaft; 3241. Connecting wheel three; 325. 326. Connecting wheel 2; 33. Transmission belt 2; 34. Transmission belt 1; 35. Locking assembly; 36. Movable block; 37. Inclined surface; 38. Movable groove; 39. Abutment spring; 30. Abutment block; 31. Snap-fit ​​surface; 40. Exhaust unit; 41. Exhaust duct; 42. Air extraction assembly; 421. Rotary drum; 422. Fan blade; 423. Exhaust duct; 424. Fixing rod; 425. Screw 43. Swirl guide vanes; 431. Enclosure assembly; 431. Fixed disk one; 4311. Telescopic groove; 432. Sealing plate; 4321. Limiting block; 4322. Drive block; 433. Fixed disk two; 4331. Limiting groove; 4332. Connecting groove one; 434. Rotating gear disk; 4341. Drive groove; 4342. Connecting groove two; 5. Enclosure control unit; 51. Electric push rod; 52. Movable plate; 53. 531. Drive component 1; 532. Gear 1; 533. Gear 2; 533. Gear 3; 5331. Connecting rod; 5332. Spiral groove; 54. Drive component 2; 541. Fixing sleeve; 5412. Spiral protrusion; 542. Extrusion block; 5421. Arc surface; 543. Tooth plate; 6. Overhead ventilation unit; 61. Double-layer fixing plate; 62. Ventilation interlayer; 63. Ventilation hole; 64. Moisture-proof pad layer. Detailed Implementation

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] Example, refer to Figure 1 - Figure 14According to one embodiment of the present invention, a photovoltaic power box-type substation with a prefabricated assembly foundation is provided, including a base 1, a box 2 set on the base 1, an air intake unit 3 set on the base 1 and cooperating with the box 2, an exhaust unit 4 set on the box 2, a closed control unit 5 set on the box 2, and an overhead ventilation unit 6 set on the box 2. The base 1 is used to support the entire substation. The overall foundation of the box 2 is prefabricated in the factory. The box 2, air intake unit 3, exhaust unit 4 and embedded parts are integrated and processed before leaving the factory. On-site installation can be completed by leveling the foundation, hoisting into place, and connecting the base 1 and the box 2. There is no wet work on site. The air intake unit 3 is used to introduce airflow from the bottom of the box 2. The exhaust unit 4 is used to exhaust hot air from the box 2. The closed control unit 5 is used to control the connection and closure of the box 2 with the outside world according to the environment to prevent water vapor intrusion and condensation. The overhead ventilation unit 6 is used to install equipment such as transformers and switch cabinets, and works with the air intake unit 3 to dissipate heat from the bottom of the equipment.

[0019] The base 1 has guide slopes 11 on both sides corresponding to the air duct 31, and guide blocks 12 are provided on the guide slopes 11. The air inlet unit 3 includes air ducts 31 on both sides of the box 2, air guide components 32 at the bottom of the box 2 that cooperate with the air ducts 31, a transmission belt 33 on the air guide components 32, and a locking component 34 on the box 2 that cooperates with the transmission belt 33. The guide slopes 11 and the air ducts 31 form an airflow channel leading to the bottom of the box 2, and the airflow channel becomes narrower towards the middle of the box 2, which increases the airflow speed. The airflow is guided into the box 2 by the guide blocks 12. At the same time, the guide slopes 11 can also prevent rainwater from entering the box 2 in conjunction with the base 1. The air guide components 32 are used to open or close the bottom of the box 2. The transmission belt 33 is used to open or close the air guide components 32 in conjunction with the drive of the sealing control unit 5. The locking component 34 is used to lock the state of the transmission belt 33.

[0020] The exhaust unit 4 includes an exhaust duct 41 disposed on the top of the housing 2, an extraction component 42 disposed on the exhaust duct 41, and a sealing component 43 disposed on the housing 2 in conjunction with the exhaust duct 41; wherein, the exhaust duct 41 is used to connect the top of the housing 2 to the outside world for hot air exhaust, the extraction component 42 is used to rotate under the force of wind or hot air to accelerate the exhaust of hot air from the exhaust duct 41, and the sealing component 43 is used to open or close the port connecting the exhaust duct 41 and the housing 2.

[0021] The air guiding assembly 32 includes a fixing block 321 disposed at the bottom of the inner wall of the housing 2, multiple sets of air guiding plates 322 disposed on the fixing block 321, a connecting wheel 323 disposed on the air guiding plate 322, a drive shaft 324 disposed on the fixing block 321, a connecting wheel 325 disposed on the drive shaft 324, and a drive belt 326 disposed on the drive shaft 324 and the connecting wheel 325; wherein, the fixing block 321 is used to support the air guiding plate 322, the air guiding plate 322 is used to rotate to open or close the bottom of the housing 2, and the connecting wheel 323 is used to cooperate with the connecting wheel 325 and the drive belt 326 to rotate.

[0022] The fixed block 321 has a movable cavity 3211 that cooperates with the second transmission belt 326. The movable cavity 3211 is used for the second transmission belt 326 to pass through, and the second connecting wheel 325 drives the first connecting wheel 323 to rotate.

[0023] A connecting wheel 3241 is provided on the drive shaft 324 to cooperate with the drive belt 33. One end of the drive belt 33 is sleeved on the connecting wheel 3241. The connecting wheel 3241 is used to cooperate with the drive belt 33 to drive the drive shaft 324 to rotate, thereby driving the connecting wheel 325 to rotate through the drive shaft 324.

[0024] The air guide plate 322 has grooves 3221 and protrusions 3222 that cooperate with each other on both sides. The fixing block 321 has a stop block 3212 and a stop block 3213 that cooperate with the grooves 3221 and protrusions 3222 on both sides. In the closed state, the outermost groove 3221 abuts against the stop block 3212, and the protrusion 3222 abuts against the stop block 3213. The grooves 3221 and protrusions 3222 of the adjacent air guide plates 322 abut against each other in sequence, sealing the bottom of the box 2. In the open state, the air guide plate 322 drives the grooves 3221 to flip upward and the protrusions 3222 to flip downward under the action of the connecting wheel 323, so that the air guide plate 322 rotates 90 degrees as a whole, opening the bottom space of the box 2, so that the airflow guided by the guide block 12 can be received and contact the overhead ventilation unit 6.

[0025] The locking component 34 includes a movable block 341 disposed on the housing 2, a movable groove 342 disposed on the housing 2 to cooperate with the movable block 341, an abutment spring 343 with its two ends respectively abutting against the movable block 341 and the movable groove 342, and an abutment block 344 disposed on the movable block 341. The movable block 341 is used to move back and forth on the movable groove 342, the abutment spring 343 is used to drive the movable block 341 back to its initial state, and the abutment block 344 is used to contact the upper part of the transmission belt 33 to fix the state of the transmission belt 33 and prevent the transmission belt 33 from driving the connecting wheel 3241 to rotate.

[0026] The abutment block 344 is provided with a snap-fit ​​surface 3441 that engages with the top of the transmission belt 33 to fix the state of the transmission belt 33.

[0027] The enclosure control unit 5 includes an electric push rod 51 mounted on the housing 2, a movable plate 52 mounted on the output end of the electric push rod 51 and slidably mounted on the housing 2, a first drive member 53 mounted on the movable plate 52 to cooperate with the enclosure component 43, and a second drive member 54 mounted on the movable plate 52 to cooperate with the movable block 341. The electric push rod 51 is used to drive the movable plate 52 to move up and down in the housing 2, the first drive member 53 is used for transmission to drive the enclosure component 43 to move, and the second drive member 54 is used to cooperate with the movement of the movable plate 52 to drive the first drive member 53 and the movable block 341 to move.

[0028] The second driving component 54 includes a pressing block 542 disposed on the movable plate 52 and a toothed plate 543 disposed on the movable plate 52. The movable block 341 is provided with an inclined surface 3411, and the pressing block 542 is provided with an arc surface 5421 that cooperates with the inclined surface 3411. The pressing block 542 is used to cooperate with the movable plate 52 to move downward. By contacting the inclined surface 3411 through the arc surface 5421, the movable block 341 and the abutment block 344 are pressed into the movable groove 342. Then, the toothed plate 543 contacts and engages with the first transmission belt 33. By moving downward through the toothed plate 543, the first transmission belt 33 is driven to perform transmission, thereby driving the third connecting wheel 3241 to rotate.

[0029] The air extraction assembly 42 includes a rotating cylinder 421 mounted on the exhaust duct 41, a fan blade 422 mounted on the rotating cylinder 421, an exhaust groove 423 mounted on the rotating cylinder 421, a fixing rod 424 mounted on the rotating cylinder 421, and a spiral guide vane 425 mounted on the fixing rod 424. The rotating cylinder 421 is rotatably mounted at the outlet end of the exhaust duct 41. When the fan blade 422 is driven by wind, it drives the spiral guide vane 425 to rotate through the fixing rod 424, thereby capturing and pressurizing the air in the exhaust duct 41 and discharging it from the exhaust groove 423. At the same time, when the spiral guide vane 425 is impacted by the rising hot airflow, it drives the entire air extraction assembly 42 to rotate, thereby accelerating the discharge of hot airflow.

[0030] The sealing component 43 includes a first fixed plate 431 disposed at the port of the exhaust duct 41, multiple sealing plates 432 disposed on the first fixed plate 431, a second fixed plate 433 disposed on the first fixed plate 431, and a rotating gear 434 disposed on the second fixed plate 433. The first fixed plate 431 is used to support the sealing plates 432 in conjunction with the second fixed plate 433. The ends of the sealing plates 432 can be spliced ​​into a whole to seal the port of the exhaust duct 41. The rotating gear 434 is used to rotate in conjunction with the first drive component 53, thereby driving the sealing plates 432 to move.

[0031] The fixed plate 431 is provided with a telescopic groove 4311 that cooperates with the sealing plate 432. The sealing plate 432 slides back and forth on the telescopic groove 4311 to close or open the port of the exhaust duct 41.

[0032] The sealing sheet 432 is provided with a limiting block 4321 and a driving block 4322. The fixed disk 433 is provided with a limiting groove 4331 that cooperates with the limiting block 4321. The rotating gear disk 434 is provided with a driving groove 4341 that cooperates with the driving block 4322. The limiting groove 4331 cooperates with the limiting block 4321 to make the sealing sheet 432 move linearly in a positioning manner. The driving groove 4341 cooperates with the rotation of the rotating gear disk 434 to generate a thrust on the driving block 4322, driving the sealing sheet 432 to move along the limiting path of the limiting groove 4331.

[0033] The fixed disk 433 is provided with a connecting groove 4332, and the rotating gear disk 434 is provided with a connecting groove 4342. The connecting groove 4332 and the connecting groove 4342 are connected. The connecting groove 4332 and the connecting groove 4342 are used to cooperate with the exhaust duct 41 to communicate with the inside of the box 2.

[0034] The drive component 53 includes a gear 531 mounted on the housing 2 and engaging with a rotating gear 434, a gear 532 mounted on the gear 531, and a gear 533 mounted on the housing 2 and engaging with the gear 532. The gear 531 drives the adjacent rotating gear 434 to rotate, and the gear 532 is concentrically mounted with the gear 531 to engage with the gear 533 to drive the gear 531 to rotate.

[0035] Gear 3 533 is provided with a connecting rod 5331, and the connecting rod 5331 is provided with a spiral groove 5332. The movable plate 52 is provided with a fixed sleeve 541, and the fixed sleeve 541 is provided with a spiral protrusion 5412 that matches the spiral groove 5332. The fixed sleeve 541 moves up and down in conjunction with the movable plate 52. The connecting rod 5331 is rotated by the cooperation of the spiral protrusion 5412 and the spiral groove 5332, thereby driving gear 3 533 to rotate.

[0036] The overhead ventilation unit 6 includes a double-layer fixing plate 61 mounted on the housing 2, a ventilation interlayer 62 formed on the double-layer fixing plate 61, a ventilation hole 63 on the double-layer fixing plate 61 connecting to the ventilation interlayer 62, and a moisture-proof pad 64 mounted on the ventilation interlayer 62. The double-layer fixing plate 61 is used to fix and install equipment such as transformers. The ventilation interlayer 62 and the ventilation hole 63 work together to allow the heat generated at the bottom of the equipment to enter the ventilation hole 63 through the ventilation interlayer 62 during operation, and then be discharged from the housing 2 through the ventilation interlayer 62 and discharged from the housing 2 through the exhaust duct 41. The moisture-proof pad 64 has the effect of preventing moisture and blocking wind and sand. The double-layer fixing plate 61 is set up as an upper and lower split, and the bottom of the double-layer fixing plate 61 can be removed to inspect and replace the moisture-proof pad 64.

[0037] In summary, during normal heat dissipation, the electric push rod 51 starts and drives the movable plate 52 to move downward. At this time, the fixed sleeve 541 drives the connecting rod 5331 to rotate through the cooperation of the spiral protrusion 5412 and the spiral groove 5332. The connecting rod 5331 drives the gear three 533 to rotate. The gear three 533 drives the gear one 531 to rotate through the gear two 532. At this time, the rotating gear disk 434 rotates in cooperation with the gear one 531. The rotating gear disk 434 pushes the driving block 4322 through the driving groove 4341. The sealing plate 432 moves outward under the limiting action of the limiting block 4321 and the limiting groove 4331, so that the exhaust duct 41 passes through the connecting groove one 43 32. The connecting groove 4342 is connected to the internal space of the housing 2. At this time, as the movable plate 52 moves downward, the pressing block 5421 contacts the inclined surface 3411 and pushes the movable block 341 into the movable groove 342. The abutting block 344 moves in coordination with the movable block 341, causing the locking surface 3441 to leave the transmission belt 33, so that the transmission belt 33 returns to its free state until the toothed plate 543 contacts the transmission belt 33 as the movable plate 52 moves downward. After the transmission belt 33 contacts and locks with the toothed plate 543, the transmission belt 33 moves downward with the toothed plate 543 to transmit power. The transmission belt 33 is connected to the connecting wheel. The third 3241 drives the drive shaft 324 to rotate. The drive shaft 324 drives the connecting wheel 323 to rotate via the second connecting wheel 325 and the second drive belt 326. At this time, the groove 3221 flips upward and the protrusion 3222 flips downward, causing the air guide plate 322 to rotate 90° as a whole. At this time, the bottom of the box 2 opens, and the air force enters the bottom of the box 2 through the air duct 31 and the guide slope 11. The heat generated by the operation of the equipment is discharged to the outside through the exhaust groove 423. The heat at the bottom of the equipment is dissipated into the ventilation hole 63 through the ventilation jacket 62. The airflow enters the ventilation hole 63 through the ventilation jacket 62, causing the heat to rush upward from the other ventilation jackets 62. The airflow enters the upper space of the housing 2. During the process, the airflow passes over the outer surface of the equipment from bottom to top, carrying away heat. The hot airflow enters the exhaust duct 41 and impacts the spiral guide vane 425, causing the spiral guide vane 425 to rotate. The rotation of the spiral guide vane 425 generates suction in the internal space of the housing 2, accelerating the rise of the hot airflow. The fan blade 422 is driven by the wind to rotate, further accelerating the rotation of the spiral guide vane 425. Together, they promote the airflow to circulate from bottom to top, dissipating the heat generated by the operation of the equipment. When there is sufficient water vapor in the air, the airflow enters the ventilation interlayer 62 and passes through the moisture-proof pad 64, where the moisture is intercepted.

[0038] In areas with large temperature differences between day and night, when the photovoltaic equipment does not generate electricity at night, the electric push rod 51 starts and drives the movable plate 52 to move upward. The toothed plate 543, in conjunction with the movable plate 52, moves upward and drives the transmission belt 33 to reverse, causing the air guide plate 322 to reverse back to the closed state. The spiral protrusion 5412, in conjunction with the spiral groove 5332, drives the gear 3 533 to reverse, causing the rotating toothed disc 434 to flip and drive the sealing plate 432 to re-close the port of the exhaust duct 41. In this state, the entire housing 2 is in a closed state, and external moisture cannot enter the housing 2.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A photovoltaic power box-type substation with a prefabricated assembled foundation, characterized in that: It includes a base (1), a box (2) set on the base (1), an air inlet unit (3) set on the base (1) to cooperate with the box (2), an exhaust unit (4) set on the box (2), a closed control unit (5) set on the box (2), and an overhead ventilation unit (6) set on the box (2). The base (1) is provided with guide slopes (11) on both sides of the air duct (31), and guide blocks (12) are provided on the guide slopes (11). The air intake unit (3) includes air ducts (31) disposed on both sides of the housing (2), air guide assembly (32) disposed at the bottom of the housing (2) in conjunction with the air ducts (31), a transmission belt (33) disposed on the air guide assembly (32), and a locking assembly (34) disposed on the housing (2) in conjunction with the transmission belt (33). The exhaust unit (4) includes an exhaust duct (41) installed on the top of the housing (2), an air extraction component (42) installed on the exhaust duct (41), and a sealing component (43) installed on the housing (2) to cooperate with the exhaust duct (41).

2. The photovoltaic power box-type substation with prefabricated assembled foundation according to claim 1, characterized in that: The air guide assembly (32) includes a fixed block (321) disposed at the bottom of the inner wall of the housing (2), multiple sets of air guide plates (322) disposed on the fixed block (321), a connecting wheel (323) disposed on the air guide plate (322), a drive shaft (324) disposed on the fixed block (321), a connecting wheel (325) disposed on the drive shaft (324), and a drive belt (326) disposed on the drive shaft (324) and the connecting wheel (325). The fixed block (321) has a movable cavity (3211) for cooperating with the transmission belt (326); A connecting wheel (3241) is provided on the drive shaft (324) to cooperate with the drive belt (33).

3. The photovoltaic power box-type substation with prefabricated assembled foundation according to claim 2, characterized in that: The air guide plate (322) has grooves (3221) and protrusions (3222) that cooperate with each other on both sides. The fixing block (321) has a stop block one (3212) and a stop block three (3213) that cooperate with the grooves (3221) and protrusions (3222) on both sides.

4. The photovoltaic power box-type substation with prefabricated assembled foundation according to claim 1, characterized in that: The locking assembly (34) includes a movable block (341) disposed on the housing (2), a movable groove (342) disposed on the housing (2) to cooperate with the movable block (341), an abutting spring (343) with its two ends respectively abutting against the movable block (341) and the movable groove (342), and an abutting block (344) disposed on the movable block (341). The abutment block (344) is provided with a snap-fit ​​surface (3441) that engages with the transmission belt (33).

5. The photovoltaic power box-type substation with prefabricated assembled foundation according to claim 4, characterized in that: The closed control unit (5) includes an electric push rod (51) disposed on the housing (2), a movable plate (52) disposed on the output end of the electric push rod (51) and slidably disposed on the housing (2), a drive component one (53) disposed on the movable plate (52) and cooperating with the closed component (43), and a drive component two (54) disposed on the movable plate (52) and cooperating with the movable block (341).

6. The photovoltaic power box-type substation with prefabricated assembled foundation according to claim 5, characterized in that: The second driving component (54) includes an extrusion block (542) disposed on the movable plate (52) and a toothed plate (543) disposed on the movable plate (52); The movable block (341) is provided with an inclined surface (3411), and the extrusion block (542) is provided with an arc surface (5421) that matches the inclined surface (3411).

7. The photovoltaic power box-type substation with prefabricated assembled foundation according to claim 6, characterized in that: The exhaust assembly (42) includes a rotating drum (421) disposed on the exhaust duct (41), a fan blade (422) disposed on the rotating drum (421), an exhaust groove (423) disposed on the rotating drum (421), a fixing rod (424) disposed on the rotating drum (421), and a spiral guide vane (425) disposed on the fixing rod (424).

8. The photovoltaic power box-type substation with prefabricated assembled foundation according to claim 7, characterized in that: The enclosure component (43) includes a fixed plate one (431) disposed at the port of the exhaust duct (41), multiple sealing plates (432) disposed on the fixed plate one (431), a fixed plate two (433) disposed on the fixed plate one (431), and a rotating toothed plate (434) disposed on the fixed plate two (433). The fixed plate (431) is provided with a telescopic groove (4311) that cooperates with the sealing plate (432). The sealing sheet (432) is provided with a limiting block (4321) and a driving block (4322), the fixed disk (433) is provided with a limiting groove (4331) that matches the limiting block (4321), and the rotating gear disk (434) is provided with a driving groove (4341) that matches the driving block (4322). The fixed disk 2 (433) is provided with a connecting groove 1 (4332), and the rotating gear disk (434) is provided with a connecting groove 2 (4342). The connecting groove 1 (4332) and the connecting groove 2 (4342) are connected.

9. The photovoltaic power box-type substation with prefabricated assembled foundation according to claim 8, characterized in that: The first drive component (53) includes a gear 1 (531) mounted on the housing (2) and engaging with a rotating gear disk (434), a gear 2 (532) mounted on the gear 1 (531), and a gear 3 (533) mounted on the housing (2) and engaging with the gear 2 (532). A connecting rod (5331) is provided on the gear three (533), a spiral groove (5332) is provided on the connecting rod (5331), a fixed sleeve (541) is provided on the movable plate (52), and a spiral protrusion (5412) that matches the spiral groove (5332) is provided on the fixed sleeve (541).

10. The photovoltaic power box-type substation with prefabricated assembled foundation according to claim 9, characterized in that: The overhead ventilation unit (6) includes a double-layer fixed plate (61) installed on the box (2), a ventilation interlayer (62) opened on the double-layer fixed plate (61), a ventilation hole (63) connected to the ventilation interlayer (62) installed on the double-layer fixed plate (61), and a moisture-proof pad (64) installed on the ventilation interlayer (62).

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