CN220368339U - Photovoltaic box-type substation - Google Patents

Abstract

The utility model discloses a photovoltaic box-type substation, which belongs to the technical field of photovoltaic substations, and comprises a substation box and further comprises: the inner wall of the receiving box is slidably attached with a piston plate; the position of the water outlet hole is higher than that of the piston plate; a plurality of plugging mechanisms are arranged in the heat dissipation opening and used for plugging the heat dissipation opening; in this scheme drive shutoff mechanism through drive mechanism and take place to rotate, can seal the thermovent, the extremely big rain that avoids outside portion can enter into the inside condition of transformer substation case from the thermovent, also can extremely reduce the inside moisture of transformer substation case through sealing the thermovent simultaneously, has better protection to parts such as the inside electrical components of transformer substation case, has greatly avoided the rainwater to get into can cause great influence to it, improves the life and job stabilization and the security of transformer substation case.

Description

Photovoltaic box-type substation

Technical Field

The utility model relates to the technical field of photovoltaic substations, in particular to a photovoltaic box-type substation.

Background

The photovoltaic power generation is to send the electric energy converted from solar energy to various places, which requires the operation of related electric equipment, and the transformation of electric energy integration, which requires complete equipment such as a photovoltaic box-type transformer substation. The photovoltaic box-type transformer substation is a novel box-type transformer substation integrated with a photovoltaic power generation alternating-current and direct-current system, an inverter device, a low-loss transformer and other control systems, and is ideal matching equipment of the photovoltaic power generation system. The photovoltaic box-type transformer substation is a factory prefabricated indoor and outdoor compact type distribution equipment which is formed by arranging high-voltage switch equipment, a distribution transformer and a low-voltage distribution device into a whole according to a certain wiring scheme.

The outdoor photovoltaic box-type substation's lateral wall all can be equipped with heat dissipation grid or louvre etc. in order to reach the inside circulation of air of transformer substation case and radiating effect, but when meetting heavy rain outdoors, the rainwater easily enters into the inside of transformer substation case through heat dissipation grid or louvre to and can make inside moisture heavier, can cause great influence to the electrical components etc. of inside of transformer substation case, is unfavorable for the use of transformer substation case, can take place danger when serious.

Disclosure of Invention

The utility model aims to provide a photovoltaic box-type substation for solving the technical problems.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a photovoltaic box-type substation, comprising a substation box, further comprising:

the receiving box is arranged at the top of the transformer substation box, a piston plate is attached to the inner wall of the receiving box in a sliding manner, and a plurality of first elastic pieces are arranged between the piston plate and the top of the transformer substation box;

the water outlet is formed in the side wall of the receiving box and is communicated with the interior of the receiving box, and the position of the water outlet is higher than that of the piston plate;

the radiating opening penetrates through the side wall of the transformer substation box, and a plurality of plugging mechanisms are arranged in the radiating opening and used for plugging the radiating opening;

the transmission mechanism is arranged in the transformer substation box and drives the plugging mechanism to rotate to plug the heat dissipation port through the cooperation of the transmission mechanism and the piston plate.

Further, the plugging mechanism comprises:

a rotating shaft which is rotatably arranged on the front wall and the rear wall of the transformer substation box, a first gear and a first sealing plate are arranged on the rotating shaft,

the second shrouding is articulated in on the first shrouding, the second shrouding with be equipped with the second elastic component between the first shrouding.

Further, the transmission mechanism includes:

the rotating rod is rotationally arranged on the inner wall of the transformer substation box and is provided with a second gear;

the transmission rod is arranged at the lower end of the piston plate, and the other end of the transmission rod movably penetrates through the transformer substation box and is provided with a first tooth section meshed with the second gear;

and the linkage rod is arranged on the inner wall of the transformer substation box in a sliding manner, one side of the linkage rod is provided with a second tooth segment meshed with the second gear, and the other side of the linkage rod is provided with a third tooth segment meshed with each first gear.

Further, a sliding groove is formed in the inner wall of the transformer substation box, a sliding rod is arranged on the inner wall of the sliding groove in a sliding mode, and the outer end of the sliding rod is connected with the linkage rod.

Further, the top of the cooling hole is hinged with an auxiliary sealing plate, a third elastic piece is arranged between the auxiliary sealing plate and the top of the cooling hole, and the end part of the auxiliary sealing plate is in sliding fit with the uppermost side of the first sealing plate.

Further, the side wall of the receiving box is provided with a plurality of drainage channels communicated with the water outlet holes, the side wall of the transformer substation box is provided with a plurality of heat dissipation channels communicated with the drainage channels, and the side wall of the bottom of the transformer substation box is provided with a discharge outlet communicated with the heat dissipation channels.

Further, a filter screen is arranged at the junction of the inner wall of the drainage channel and the water outlet hole.

Further, the top of the receiving box is provided with a fixed plate, and two sides of the fixed plate are symmetrically hinged with screen plates.

Compared with the prior art, the utility model has the advantages that:

1. in this scheme when the rainwater is great, rainwater gathering speed is greater than rainwater from apopore discharge rate, the piston board moves down, drive shutoff mechanism through drive mechanism and take place to rotate, can seal the thermovent, the extremely outside heavy rain of avoiding can enter into the inside condition of transformer substation case from the thermovent, also can greatly reduce the inside moisture of transformer substation case through sealing the thermovent simultaneously, have better protection to parts such as the inside electrical components of transformer substation case, greatly avoided the rainwater to get into can cause great influence to it, improve the life and the job stabilization and the security of transformer substation case. Meanwhile, the situation that small animals which are partially active in rainy days enter the transformer substation box through the heat dissipation openings is avoided by sealing the heat dissipation openings, normal operation of the transformer substation box is guaranteed, the protection performance of the heat dissipation channels is improved, and the practicability is high.

2. This scheme is when the rainwater enters into the apopore, there is partial rainwater entering drainage passageway in, finally can get into in the heat dissipation passageway play radiating effect, can carry out cold and hot exchange to the inside of transformer substation case, and partial heat can be taken away to final rainwater and the discharge, and then can be when the thermovent is shutoff, can dispel the heat to the transformer substation incasement through the rainwater in the heat dissipation passageway, further guaranteed the normal operating of transformer substation case, improved the result of use and the life of the part in the transformer substation case, the practicality further promotes.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of a partial cross-sectional internal perspective of a substation box according to the present utility model;

FIG. 3 is an enlarged schematic view of the structure of FIG. 2A;

FIG. 4 is an enlarged schematic view of the structure of FIG. 2B;

FIG. 5 is a schematic view of the internal cross-section front structure of the transformer station and the receiving box of the present utility model;

FIG. 6 is an enlarged schematic view of FIG. 5 at C;

FIG. 7 is a schematic view of another morphology of FIG. 5;

fig. 8 is an enlarged schematic view of the structure at D in fig. 7.

The reference numerals in the figures illustrate:

1. a substation box; 2. a receiving box; 3. a piston plate; 4. a first elastic member; 5. a water outlet hole; 6. a heat radiation port; 7. a plugging mechanism; 71. a rotating shaft; 72. a first gear; 73. a first sealing plate; 74. a second sealing plate; 75. a second elastic member; 8. a transmission mechanism; 81. a rotating rod; 82. a second gear; 83. a transmission rod; 84. a first tooth segment; 85. a linkage rod; 86. a second tooth segment; 87. a third tooth segment; 9. an auxiliary sealing plate; 10. a third elastic member; 11. a drainage channel; 12. a heat dissipation channel; 13. a filter screen; 14. a heat radiation fin; 15. a fixing plate; 16. screen plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Embodiment one:

referring to fig. 1-3 and fig. 5-8, a photovoltaic box-type substation, comprising a substation box 1, further comprising: the receiving box 2 is arranged at the top of the transformer substation box 1, a piston plate 3 is attached to the inner wall of the receiving box 2 in a sliding manner, and a plurality of first elastic pieces 4 are arranged between the piston plate 3 and the top of the transformer substation box 1; the water outlet hole 5 is formed in the side wall of the receiving box 2 and is communicated with the interior of the receiving box 2, and the position of the water outlet hole 5 is higher than that of the piston plate 3; a heat dissipation port 6 is arranged on the side wall of the transformer substation box 1 in a penetrating way, and a plurality of plugging mechanisms 7 are arranged in the heat dissipation port 6 and used for plugging the heat dissipation port 6; the transmission mechanism 8 is arranged in the transformer substation box 1 and drives the plugging mechanism 7 to rotate to plug the heat dissipation port 6 through the cooperation with the piston plate 3. The side wall of the receiving box 2 is provided with a drain hole communicated with the inside of the receiving box, so that water in the receiving box 2 and below the piston plate 3 can be conveniently discharged, and the situation that water flows down through a gap with the piston plate 3 to be accumulated and cannot be discharged in a short time is avoided.

When the transformer substation box 1 is used, ventilation and heat dissipation can be carried out normally through the heat dissipation opening 6 on the side wall of the transformer substation box. When raining, the rainwater can fall into the interior of the receiving box 2 through the screen plate 16, the rainwater can fall on the piston plate 3, and when the rainwater is not big, the rainwater on the piston plate 3 can be discharged through the water outlet holes 5 on the receiving box 2 in a normal state at the moment. When the rainwater is large, the rainwater collecting speed on the piston plate 3 is larger than the rainwater discharging speed from the water outlet hole 5, namely, only a small part of rainwater can be discharged from the water outlet hole 5, at the moment, the water on the piston plate 3 can be more and more, the force born by the piston plate 3 can be larger and larger, the pressure can be larger than the elastic force of the first elastic piece 4, the piston plate 3 can move downwards and compress the first elastic piece 4, when the piston plate 3 moves downwards, the sealing mechanism 8 can be driven to drive the sealing mechanism 7 to rotate, the heat dissipation opening 6 can be sealed through the sealing mechanism 7, the condition that heavy rainwater at the outer part can enter the inside of the transformer substation box 1 from the heat dissipation opening 6 can be greatly avoided, meanwhile, the moisture inside the transformer substation box 1 can be greatly reduced through sealing the heat dissipation opening 6, parts such as electric elements inside the transformer substation box 1 are well protected, the influence of the rainwater entering can be greatly avoided, the service life of the transformer substation box 1 is prolonged, and the working stability and the safety are improved. Meanwhile, the situation that small animals which are partially active in rainy days enter the transformer substation box 1 through the heat dissipation opening 6 is avoided by sealing the heat dissipation opening 6, normal operation of the transformer substation box 1 is guaranteed, and the protection performance of the heat dissipation channel 12 is improved, so that the practicability is high.

When the rain gradually decreases, the elastic force of the first elastic member 4 is gradually greater than the pressure of the rain on the piston plate 3, the piston plate 3 gradually moves upwards, and finally, when the amount of the rain is smaller than the flow quantity of the water outlet hole 5, the piston plate 3 returns to the initial position. The same principle can be achieved, the plugging mechanism 7 can be restored to the original position through the transmission mechanism 8, and the heat dissipation port 6 is communicated with the outside and the inside of the transformer substation box 1 at the moment, so that air can be communicated through the heat dissipation port 6 normally to dissipate heat, the working process is simple and convenient, manual operation is not needed, time and labor are saved, a large amount of cost is saved, and the protection effect of the transformer substation box 1 is greatly improved.

In this embodiment, referring to fig. 1 to 4 and 8, the plugging mechanism 7 preferably includes: the pivot 71 rotates the front and back wall of locating transformer substation case 1, is equipped with first gear 72 and first shrouding 73 on the pivot 71, and second shrouding 74 articulates on first shrouding 73, is equipped with second elastic component 75 between second shrouding 74 and the first shrouding 73. The first gear 72 and the rotating shaft 71 are driven to rotate by the transmission mechanism 8, the rotating shaft 71 drives the first sealing plates 73 to rotate, the first gear 72 on the left side rotates anticlockwise, namely drives the first sealing plates 73 on the left side to rotate anticlockwise downwards, the first gear 72 on the right side rotates clockwise, namely drives the first sealing plates 73 on the right side to rotate clockwise downwards, accordingly, the first sealing plates 73 in the heat dissipation ports 6 on the left side and the right side of the transformer substation box 1 rotate downwards, the second sealing plates 74 are driven to move together when the first sealing plates 73 rotate downwards, in the rotating process, the second sealing plates 74 are gradually contacted with the adjacent first sealing plates 73, the second sealing plates 74 are gradually extruded by the first sealing plates 73 to enable the second sealing plates 74 to rotate along the hinge points with the first sealing plates 73, the second elastic pieces 75 are stretched, at the moment, the second sealing plates 74 are tightly attached to the adjacent first sealing plates 73, namely the gaps between the adjacent first sealing plates 73 are blocked, and the second sealing plates 74 at the lowest are tightly attached to the bottoms of the heat dissipation ports 6, as shown in fig. 7-8. At this time, the heat radiation port 6 can be sealed by the first sealing plate 73 and the second sealing plate 74, and the situation that heavy rain under the outer part enters the transformer substation box 1 from the heat radiation port 6 can be greatly avoided.

After rain is small or stopped, the elastic force of the first elastic member 4 is gradually greater than the pressure of the rainwater on the piston plate 3, the piston plate 3 gradually moves upwards, the first sealing plate 73 gradually rotates upwards through the transmission mechanism 8, the second sealing plate 74 also gradually leaves the adjacent first sealing plate 73, and finally the piston plate returns to the original position.

In this embodiment, referring to fig. 2, 4-5 and 7, the transmission mechanism 8 preferably includes: the rotating rod 81 is rotatably arranged on the inner wall of the substation box 1, and a second gear 82 is arranged on the rotating rod 81; the transmission rod 83 is arranged at the lower end of the piston plate 3, and the other end of the transmission rod movably penetrates through the transformer substation box 1 and is provided with a first tooth segment 84 meshed with the second gear 82; the linkage rod 85 is slidably disposed on the inner wall of the substation box 1, one side is provided with a second tooth segment 86 engaged with the second gear 82, and the other side is provided with a third tooth segment 87 engaged with each first gear 72. When the piston plate 3 moves downwards, the driving rod 83 and the first tooth segment 84 are driven to move downwards, the first tooth segment 84 moves downwards and drives the second gear 82 and the rotating rod 81 to rotate, the second gear 82 on the left side rotates clockwise, the second gear 82 on the right side rotates anticlockwise, the second gear 82 drives the linkage rod 85 and the third tooth segment 87 to move upwards through meshing with the second tooth segment 86 when rotating, and the third tooth segment 87 drives the first gear 72 and the rotating shaft 71 to rotate when moving upwards.

In this embodiment, preferably, referring to fig. 2 and 4, a chute 17 is provided on the inner wall of the substation box 1, a sliding rod 18 is slidably provided on the inner wall of the chute 17, and the outer end of the sliding rod 18 is connected to a linkage rod 85. When the linkage rod 85 moves up and down, the sliding rod 18 is driven to slide along the sliding groove 17, so that the movement stability of the linkage rod 85 can be improved.

In this embodiment, preferably, referring to fig. 1-3, 5 and 7, an auxiliary sealing plate 9 is hinged to the top of the heat dissipation port 6, a third elastic member 10 is disposed between the auxiliary sealing plate 9 and the top of the heat dissipation port 6, and an end portion of the auxiliary sealing plate 9 is slidably attached to the uppermost first sealing plate 73. The auxiliary sealing plate 9 is always attached to the adjacent first sealing plate 73, that is, the uppermost first sealing plate 73, and when the other adjacent first sealing plates 73 rotate and mutually seal the gap through the second sealing plate 74, the auxiliary sealing plate 9 is also attached to the uppermost first sealing plate 73, so that the situation that the uppermost first sealing plate 73 and the heat dissipation port 6 have the gap is avoided.

In this embodiment, preferably, referring to fig. 1 and 5, a fixing plate 15 is disposed at the top of the receiving box 2, and two sides of the fixing plate 15 are symmetrically hinged with a screen plate 16, where the screen plate 16 can prevent some larger impurities, branches and leaves from entering the receiving box 2, so as to prevent the normal operation in the subsequent receiving box 2 from being affected.

Embodiment two:

on the basis of the first embodiment, referring to fig. 5-7, a plurality of drainage channels 11 communicated with the water outlet holes 5 are arranged on the side wall of the receiving box 2, a plurality of heat dissipation channels 12 communicated with the drainage channels 11 are arranged on the side wall of the transformer substation box 1, and a discharge port communicated with the heat dissipation channels 12 is arranged on the bottom side wall of the transformer substation box 1. When the rainwater enters into the water outlet 5, partial rainwater enters into the drainage channel 11, finally enters into the heat dissipation channel 12 of the transformer substation box 1, finally is discharged from the discharge port at the bottom, and can play a role in heat dissipation through the side wall of the transformer substation box 1, cold and heat exchange can be carried out inside the transformer substation box 1, and finally partial heat can be taken away by the rainwater to be discharged, so that the inside of the transformer substation box 1 can be dissipated through the rainwater in the heat dissipation channel 12 when the heat dissipation port 6 is blocked, the condition that the heat inside the transformer substation box 1 is large is greatly avoided, the normal operation of the transformer substation box 1 is further guaranteed, the use effect and the service life of components in the transformer substation box 1 are improved, and the practicability is further improved greatly.

In this embodiment, preferably, referring to fig. 6, a filter screen 13 is disposed at the junction of the inner wall of the drainage channel 11 and the water outlet 5, and some impurities in the rainwater can be blocked out by the filter screen 13, so as to avoid the situation that the impurities enter the drainage channel 11 and the heat dissipation channel 12 to cause unsmooth blockage.

In this embodiment, preferably, referring to fig. 2, 5 and 7, a plurality of heat dissipation fins 14 are disposed at positions of the side walls of the transformer substation box 1 corresponding to the heat dissipation channels 12, heat in the transformer substation box 1 can be conducted to the side walls of the transformer substation box 1 through the heat dissipation fins 14, a part of the heat can be directly conducted to the outside through the side walls, a part of the heat can be taken away through rainwater in the heat dissipation channels 12, so that the heat dissipation effect in the transformer substation box 1 can be further improved, and the use effect is good.

Working principle: when the transformer substation box 1 is used, ventilation and heat dissipation can be normally carried out through the heat dissipation opening 6 on the side wall of the transformer substation box 1, and at the moment, the inside of the transformer substation box 1 is communicated with the outside through the heat dissipation opening 6.

When raining, the rainwater can pass through the screen plate 16 and fall into the inside of the receiving box 2, and the rainwater can fall on the piston plate 3, and when the rainwater is not big, the rainwater on the piston plate 3 can be discharged through the apopore 5 on the receiving box 2 in the normal state this moment, and the rainwater of little rain can not splash into the inside of the transformer substation box 1. When the rainwater is large, the rainwater collecting speed on the piston plate 3 is larger than the rainwater discharging speed from the water outlet hole 5, namely only a small part of rainwater can be discharged from the water outlet hole 5, at the moment, the water on the piston plate 3 is more and more, the force born by the piston plate 3 is larger and more, the pressure is larger than the elastic force of the first elastic piece 4, the piston plate 3 moves downwards and compresses the first elastic piece 4, when the piston plate 3 moves downwards, the transmission rod 83 and the first tooth segment 84 are driven to move downwards, the first tooth segment 84 moves downwards to drive the second gear 82 and the rotary rod 81 to rotate, the second gear 82 drives the linkage rod 85 and the third tooth segment 87 to move upwards through the meshing with the second tooth segment 86 during rotation, the third tooth segment 87 drives the first gear 72 and the rotating shaft 71 to rotate when moving upwards, the rotating shaft 71 drives the first sealing plates 73 to rotate downwards, the first sealing plates 73 drive the second sealing plates 74 to move together when rotating downwards, in the rotating process, the second sealing plates 74 gradually contact the adjacent first sealing plates 73, the second sealing plates 74 are gradually extruded by the first sealing plates 73, so that the second sealing plates 74 rotate along the hinge points with the first sealing plates 73, the second elastic members 75 are stretched, at the moment, the second sealing plates 74 are clung to the adjacent first sealing plates 73, namely, gaps between the adjacent first sealing plates 73 are blocked, and the bottommost second sealing plates 74 are clung to the bottoms of the heat dissipation openings 6, as shown in fig. 7-8. At this point, the interior of the receiving tank 2 is filled with rainwater, and the rainwater falls again to flow out of the screen plate 16 directly, so that a relatively stable state is formed in the receiving tank 2. At this time, the heat dissipation port 6 can be sealed by the first sealing plate 73 and the second sealing plate 74, so that heavy rain under the outer part can be prevented from entering the transformer substation box 1 from the heat dissipation port 6, and meanwhile, moisture in the transformer substation box 1 can be reduced greatly by sealing the heat dissipation port 6.

When the rain gradually decreases, the elastic force of the first elastic member 4 is gradually greater than the pressure of the rain on the piston plate 3, the piston plate 3 gradually moves upwards, and finally, when the amount of the rain is smaller than the flow quantity of the water outlet hole 5, the piston plate 3 returns to the initial position. In this regard, as the piston plate 3 moves upward, the first sealing plate 73 is gradually rotated upward by the transmission mechanism 8, and the second sealing plate 74 is gradually separated from the adjacent first sealing plate 73, so that the piston plate is finally restored to its original position.

When the rainwater enters into the water outlet 5, partial rainwater enters into the drainage channel 11, finally enters into the heat dissipation channel 12 of the transformer substation box 1, finally is discharged from the discharge outlet at the bottom, and can play a role in heat dissipation through the side wall of the transformer substation box 1, cold and heat exchange can be performed inside the transformer substation box 1, and finally partial heat can be taken away by the rainwater to be discharged, so that heat dissipation can be performed in the transformer substation box 1 through the rainwater in the heat dissipation channel 12 when the heat dissipation opening 6 is blocked.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme and the concept of the present utility model, and should be covered by the scope of the present utility model.

Claims (8)

1. A photovoltaic box-type substation, comprising a substation box (1), characterized in that it further comprises:

the receiving box (2) is arranged at the top of the transformer substation box (1), a piston plate (3) is attached to the inner wall of the receiving box (2) in a sliding mode, and a plurality of first elastic pieces (4) are arranged between the piston plate (3) and the top of the transformer substation box (1);

a water outlet hole (5) which is arranged on the side wall of the receiving box (2) and is communicated with the interior of the receiving box (2), wherein the position of the water outlet hole (5) is higher than that of the piston plate (3);

a heat dissipation opening (6) penetrating through the side wall of the transformer substation box (1), wherein a plurality of plugging mechanisms (7) are arranged in the heat dissipation opening (6) and used for plugging the heat dissipation opening (6);

the transmission mechanism (8) is arranged in the transformer substation box (1), and is matched with the piston plate (3) to drive the plugging mechanism (7) to rotate so as to plug the heat dissipation port (6).

2. A photovoltaic box-type substation according to claim 1, characterized in that said plugging mechanism (7) comprises:

a rotating shaft (71) which is rotatably arranged on the front wall and the rear wall of the transformer substation box (1), a first gear (72) and a first sealing plate (73) are arranged on the rotating shaft (71),

and a second sealing plate (74) hinged on the first sealing plate (73), wherein a second elastic piece (75) is arranged between the second sealing plate (74) and the first sealing plate (73).

3. A photovoltaic box-type substation according to claim 2, characterized in that said transmission mechanism (8) comprises:

the rotating rod (81) is rotationally arranged on the inner wall of the transformer substation box (1), and a second gear (82) is arranged on the rotating rod (81);

the transmission rod (83) is arranged at the lower end of the piston plate (3), and the other end of the transmission rod movably penetrates through the transformer substation box (1) and is provided with a first tooth section (84) meshed with the second gear (82);

the linkage rod (85) is arranged on the inner wall of the transformer substation box (1) in a sliding mode, one side of the linkage rod is provided with a second tooth segment (86) meshed with the second gear (82), and the other side of the linkage rod is provided with a third tooth segment (87) meshed with each first gear (72).

4. A photovoltaic box-type substation according to claim 3, characterized in that a chute (17) is provided on the inner wall of the substation box (1), a slide bar (18) is slidably provided on the inner wall of the chute (17), and the outer end of the slide bar (18) is connected with the linkage bar (85).

5. A photovoltaic box-type substation according to claim 2, characterized in that the top of the heat dissipation opening (6) is hinged with an auxiliary sealing plate (9), a third elastic piece (10) is arranged between the auxiliary sealing plate (9) and the top of the heat dissipation opening (6), and the end part of the auxiliary sealing plate (9) is in sliding fit with the uppermost first sealing plate (73).

6. A photovoltaic box-type substation according to claim 1, characterized in that the side wall of the receiving box (2) is provided with a plurality of drainage channels (11) communicating with the water outlet holes (5), the side wall of the substation box (1) is provided with a plurality of heat dissipation channels (12) communicating with the drainage channels (11), and the bottom side wall of the substation box (1) is provided with a discharge outlet communicating with the heat dissipation channels (12).

7. A photovoltaic box-type substation according to claim 6, characterized in that a filter screen (13) is arranged at the junction of the inner wall of the drainage channel (11) and the water outlet hole (5).

8. A photovoltaic box-type substation according to claim 1, characterized in that the top of the receiving box (2) is provided with a fixing plate (15), and two sides of the fixing plate (15) are symmetrically hinged with a screen plate (16).