Low-voltage distributed photovoltaic grid-connected cabinet

Abstract

The invention belongs to the technical field of grid-connected cabinets, and particularly relates to a low-voltage distributed photovoltaic grid-connected cabinet which comprises a photovoltaic grid-connected cabinet body, temperature sensors are installed in the middles of the upper sides of moving blocks, and smoke sensors are installed in the middles of the lower sides of the moving blocks. The photovoltaic grid-connected cabinet has the advantages that heat dissipation of the interior of the photovoltaic grid-connected cabinet body is facilitated, after the photovoltaic grid-connected cabinet body is used for a long time, heat dissipation of the interior of the photovoltaic grid-connected cabinet body is facilitated, heat dissipation of the interior of the photovoltaic grid-connected cabinet body is facilitated, and heat dissipation of the interior of the photovoltaic grid-connected cabinet body is facilitated. According to the photovoltaic grid-connected cabinet, heat generated in the photovoltaic grid-connected cabinet main body can be conveniently dissipated, faults in the photovoltaic grid-connected cabinet main body caused by the heat generated in the photovoltaic grid-connected cabinet main body are prevented, the service life of electric devices in the photovoltaic grid-connected cabinet main body can be guaranteed, and the photovoltaic grid-connected cabinet main body can be conveniently used.

Description

Technical Field

[0001] The present invention relates to the technical field of grid-connected cabinets, and in particular to a low-voltage distributed photovoltaic grid-connected cabinet. Background Art

[0002] As the global demand for clean energy continues to grow, solar photovoltaic power generation has developed rapidly as a renewable energy technology. As solar photovoltaic power generation technology becomes increasingly mature and popular, low-voltage distributed photovoltaic power generation systems have been widely used in the energy field.

[0003] As a key device connecting the photovoltaic array and the power grid, the performance and reliability of the photovoltaic grid-connected cabinet are crucial to the stable operation of the entire photovoltaic power generation system. The photovoltaic grid-connected cabinet is an important device connecting the photovoltaic array and the power grid in the photovoltaic power generation system. The photovoltaic grid-connected cabinet plays a key role in ensuring the efficient operation, stable grid connection and safety protection of the photovoltaic power generation system.

[0004] However, the existing photovoltaic grid-connected cabinets are not conducive to heat dissipation when used. When the photovoltaic grid-connected cabinets are used for a long time, heat accumulation is easy to occur in the photovoltaic grid-connected cabinet. The accumulation of heat in the photovoltaic grid-connected cabinet is easy to cause malfunctions in the photovoltaic grid-connected cabinet and affect the service life of electrical components in the photovoltaic grid-connected cabinet, which is not conducive to the use of the photovoltaic grid-connected cabinet.

[0005] To this end, we propose a low-voltage distributed photovoltaic grid-connected cabinet. Summary of the invention

[0006] In view of the above problems and / or the problems existing in the existing low-voltage distributed photovoltaic grid-connected cabinet, the present invention is proposed.

[0007] Therefore, the purpose of the present invention is to provide a low-voltage distributed photovoltaic grid-connected cabinet. By improving the existing photovoltaic grid-connected cabinet, it can solve the problem that the above-mentioned prior art is not conducive to the heat dissipation of the photovoltaic grid-connected cabinet, and when the photovoltaic grid-connected cabinet is used for a long time, it is easy to cause heat accumulation in the photovoltaic grid-connected cabinet. The accumulation of heat in the photovoltaic grid-connected cabinet is easy to cause faults in the photovoltaic grid-connected cabinet, and it will affect the service life of electrical components in the photovoltaic grid-connected cabinet, which is not conducive to the use of the photovoltaic grid-connected cabinet.

[0008] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0009] A low-voltage distributed photovoltaic grid-connected cabinet comprises a photovoltaic grid-connected cabinet main body, wherein a plurality of distributed grids are arranged at intervals along the vertical direction on the photovoltaic grid-connected cabinet main body, a plurality of moving blocks are installed at the middle of one end of the photovoltaic grid-connected cabinet main body corresponding to the distributed grids on the photovoltaic grid-connected cabinet main body, a temperature sensor is installed at the middle of the upper side of the moving blocks, a smoke sensor is installed at the middle of the lower side of the moving blocks, a plurality of second induced draft tubes connected to the photovoltaic grid-connected cabinet main body are fixed at the middle of the surface of one end of the photovoltaic grid-connected cabinet main body away from the moving blocks corresponding to the distributed grids on the photovoltaic grid-connected cabinet main body, a first induced draft tube connected to the second induced draft tube is fixed between the ends of the second induced draft tubes away from the photovoltaic grid-connected cabinet main body, a draft fan is installed at the top of the first induced draft tube, and a baffle is fixed to the lower surface of the first induced draft tube.

[0010] As a preferred solution of a low-voltage distributed photovoltaic grid-connected cabinet described in the present invention, wherein: a first fixing plate is fixed to the outer side of the outer annular surface of the second air induced draft cylinder, connecting blocks are fixed to the four corners of the surface of the first fixing plate on the side away from the main body of the photovoltaic grid-connected cabinet, a second fixing plate is fixed between the end surfaces of the connecting blocks on the same first fixing plate away from the first fixing plate, a fire extinguishing agent storage tank is installed in the middle of the surface of the second fixing plate close to the first fixing plate, the second fixing plate can fix and limit the fire extinguishing agent storage tank, the middle of the fire extinguishing agent storage tank close to one end of the first fixing plate is in an open state and is fixed with a connected second connecting pipe, a matching solenoid valve is installed on the end of the second connecting pipe away from the fire extinguishing agent storage tank, a first connecting pipe is installed on the interface of the solenoid valve away from the second connecting pipe, and the first connecting pipes are in a horizontal state and pass through the corresponding position on the first air induced draft cylinder.

[0011] As a preferred solution of a low-voltage distributed photovoltaic grid-connected cabinet described in the present invention, wherein: a plurality of matching second retention holes are spaced apart on the inner annular surface of the second air induced draft tube corresponding to the middle part of the photovoltaic grid-connected cabinet body near one end of the second air induced draft tube, the second retention holes all penetrate the inner surface and the outer surface of the corresponding positions on the photovoltaic grid-connected cabinet body, a plurality of matching second through holes are spaced apart on the side of the first air induced draft tube near the fire extinguishing agent storage tank corresponding to the first connecting pipe, the second through holes on the first air induced draft tube are fixedly connected to the corresponding positions on the outside of the first connecting pipe and are sealed, and the second through holes on the first air induced draft tube can fix and limit the first connecting pipe.

[0012] As a preferred solution of a low-voltage distributed photovoltaic grid-connected cabinet described in the present invention, wherein: a side of the first air duct close to the second air duct is provided with a plurality of matching first through holes spaced apart on the inner annular surface corresponding to the second air duct, the first through holes help to connect the first air duct with the second air duct, and the end of the first connecting pipe away from the solenoid valve is located on the inner side of the corresponding second retention hole on the main body of the photovoltaic grid-connected cabinet.

[0013] As a preferred solution of a low-voltage distributed photovoltaic grid-connected cabinet described in the present invention, a fixed block is fixed in the middle of the upper surface of the photovoltaic grid-connected cabinet body, a PLC controller is installed in the middle of the surface of one side of the fixed block, the fixed block can fix and limit the PLC controller, the temperature sensor and the smoke sensor are electrically connected to the PLC controller, the induced draft fan is electrically connected to the PLC controller, and the solenoid valves are electrically connected to the PLC controller.

[0014] As a preferred solution of a low-voltage distributed photovoltaic grid-connected cabinet described in the present invention, wherein: a plurality of first retention holes are provided at intervals corresponding to the moving block in the middle part of the photovoltaic grid-connected cabinet body near one end of the moving block, the first retention holes all penetrate the inner surface and the outer surface of the corresponding position on the photovoltaic grid-connected cabinet body, and matching frame-type limit pads are fixed on the outside of the moving block in the first retention holes on the photovoltaic grid-connected cabinet body, the frame-type limit pads help to limit the first retention holes on the photovoltaic grid-connected cabinet body and the moving block, the temperature sensors all penetrate the two side surfaces of the corresponding position on the corresponding moving block, and the smoke sensors all penetrate the two side surfaces of the corresponding position on the corresponding moving block.

[0015] As a preferred solution of a low-voltage distributed photovoltaic grid-connected cabinet described in the present invention, a movable plate is commonly fixed between the surfaces of one side of the movable block away from the main body of the photovoltaic grid-connected cabinet, the movable plate is in a vertical state, and a rotating rod is rotatably installed in the middle part of the upper end of the movable plate corresponding to the middle part of the fixed block, the rotating rods penetrate the two side surfaces of the corresponding positions on the movable plate, the outer side of the outer ring surface of the rotating rod is rotatably connected to the corresponding position on the movable plate through a bearing, and the movable plate helps to rotate and limit the rotating rod.

[0016] As a preferred solution of a low-voltage distributed photovoltaic grid-connected cabinet described in the present invention, wherein: a screw is fixed on the end surface of the rotating rod close to the fixed block, the screw thread is inserted into the corresponding position on the fixed block, and a rotating block is fixed on the end surface of the rotating rod away from the screw, and a plurality of protrusions are fixed on the outer ring surface of the rotating block at intervals in the circumferential direction, and the protrusions can prevent the outer ring surface of the rotating block from slipping, thereby facilitating the stable rotation of the rotating block.

[0017] As a preferred solution of a low-voltage distributed photovoltaic grid-connected cabinet described in the present invention, wherein: a plurality of third retention holes are provided in the middle part of the surface of one side of the photovoltaic grid-connected cabinet body corresponding to the distributed grid intervals on the photovoltaic grid-connected cabinet body, and the third retention holes all penetrate the inner surface and the outer surface of the corresponding positions on the photovoltaic grid-connected cabinet body, and matching second porous mesh plates are fixed in the third retention holes on the photovoltaic grid-connected cabinet body, and the second porous mesh plates can shield and protect the third retention holes on the photovoltaic grid-connected cabinet body.

[0018] As a preferred solution of a low-voltage distributed photovoltaic grid-connected cabinet described in the present invention, wherein: fixed rods are fixed in the middle of the four sides of the induced draft fan, the ends of the fixed rods away from the induced draft fan are fixedly connected to the corresponding positions on the inner ring surface of the first induced draft tube, and a first porous mesh plate is fixed to the upper end of the inner ring surface of the first induced draft tube, and the first porous mesh plate can shield and protect the inside of the first induced draft tube.

[0019] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0020] 1. The present invention is helpful to dissipate heat in the main body of the photovoltaic grid-connected cabinet when in use. After the main body of the photovoltaic grid-connected cabinet has been used for a long time, the heat generated in the main body of the photovoltaic grid-connected cabinet can be easily dissipated to prevent the heat generated in the main body of the photovoltaic grid-connected cabinet from causing faults in the main body of the photovoltaic grid-connected cabinet, which helps to ensure the service life of the electrical components in the main body of the photovoltaic grid-connected cabinet, so as to facilitate the use of the main body of the photovoltaic grid-connected cabinet.

[0021] 2. In the present invention, when the temperature sensor detects that the temperature inside the photovoltaic grid-connected cabinet body is higher than 40°C, the PLC controller will turn on the induced draft fan on the fixed rod, and the induced draft fan can draw air from the outside through the first induced draft tube and the first porous mesh plate. The induced draft fan can form an airflow with the drawn air and blow it into the photovoltaic grid-connected cabinet body through the first through hole on the first induced draft tube, the second induced draft tube and the second retention hole on the photovoltaic grid-connected cabinet body, so as to promote the flow of air in the photovoltaic grid-connected cabinet body and help to dissipate heat inside the photovoltaic grid-connected cabinet body.

[0022] 3. In the present invention, when the smoke sensor detects smoke in the corresponding distributed grid in the photovoltaic grid-connected cabinet body, the smoke sensor will open the corresponding solenoid valve through the PLC controller, so that the fire extinguishing agent in the corresponding fire extinguishing agent storage tank is sprayed into the corresponding distributed grid on the photovoltaic grid-connected cabinet body through the second connecting pipe, the solenoid valve and the first connecting pipe, so as to extinguish the fire in the corresponding distributed grid on the photovoltaic grid-connected cabinet body, which is conducive to the safe use of the photovoltaic grid-connected cabinet body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of the connection block structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the movable plate of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the first induced draft tube of the present invention;

[0027] Figure 5 for Figure 4 A partial enlarged schematic diagram of the middle A part;

[0028] Figure 6 for Figure 4 A partial enlarged schematic diagram of the middle B part;

[0029] Figure 7 It is a schematic diagram of the structure of the second fixing plate of the present invention;

[0030] Figure 8 It is a schematic diagram of the fixed block structure of the present invention.

[0031] In the figure: 1. photovoltaic grid-connected cabinet body; 2. fixed block; 3. screw rod; 4. rotating rod; 5. rotating block; 6. moving plate; 7. moving block; 8. first retention hole; 9. second retention hole; 10. third retention hole; 11. temperature sensor; 12. smoke sensor; 13. frame-type limit pad; 14. first induced draft duct; 15. second induced draft duct; 16. induced draft fan; 17. fixed rod; 18. first porous mesh plate; 19. second porous mesh plate; 20. first fixed plate; 21. second fixed plate; 22. connecting block; 23. first connecting pipe; 24. second connecting pipe; 25. solenoid valve; 26. fire extinguishing agent storage tank; 27. baffle; 28. first through hole; 29. ​​second through hole; 30. bump; 31. PLC controller. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] The present invention provides a low-voltage distributed photovoltaic grid-connected cabinet, which is helpful for dissipating heat in the main body of the photovoltaic grid-connected cabinet. After the main body of the photovoltaic grid-connected cabinet has been used for a long time, the heat generated in the main body of the photovoltaic grid-connected cabinet can be conveniently dissipated to prevent the heat generated in the main body of the photovoltaic grid-connected cabinet from causing a fault in the main body of the photovoltaic grid-connected cabinet, and is helpful for ensuring the service life of the electrical components in the main body of the photovoltaic grid-connected cabinet, so as to facilitate the use of the main body of the photovoltaic grid-connected cabinet.

[0034] See also Figure 1-8A low-voltage distributed photovoltaic grid-connected cabinet comprises a photovoltaic grid-connected cabinet body 1, on which a plurality of distributed grids are arranged at intervals in the vertical direction, a plurality of moving blocks 7 are installed at the middle of one end of the photovoltaic grid-connected cabinet body 1 corresponding to the distributed grids on the photovoltaic grid-connected cabinet body 1, a temperature sensor 11 is installed at the middle of the upper side of the moving blocks 7, a smoke sensor 12 is installed at the middle of the lower side of the moving blocks 7, a plurality of second induced draft tubes 15 connected to the photovoltaic grid-connected cabinet body 1 are fixed at the middle of the surface of one end of the photovoltaic grid-connected cabinet body 1 away from the moving blocks 7 corresponding to the distributed grids on the photovoltaic grid-connected cabinet body 1, and the second induced draft tubes 15 are away from the photovoltaic grid-connected cabinet body 1. A first induced draft tube 14 is fixed between one end of the photovoltaic grid-connected cabinet body 1, and an induced draft fan 16 is installed on the top of the first induced draft tube 14. A baffle 27 is fixed on the lower surface of the first induced draft tube 14, which helps to dissipate heat in the photovoltaic grid-connected cabinet body 1 when in use. After using the photovoltaic grid-connected cabinet body 1 for a long time, the heat generated in the photovoltaic grid-connected cabinet body 1 can be easily dissipated to prevent the heat generated in the photovoltaic grid-connected cabinet body 1 from causing malfunctions in the photovoltaic grid-connected cabinet body 1, which helps to ensure the service life of electrical components in the photovoltaic grid-connected cabinet body 1, so as to facilitate the use of the photovoltaic grid-connected cabinet body 1.

[0035] Among them, the first fixing plate 20 is fixed to the outer side of the outer ring surface of the second induced draft tube 15, and the four corners of the surface of the first fixing plate 20 away from the photovoltaic grid-connected cabinet body 1 are fixed with connecting blocks 22, and the connecting blocks 22 on the same first fixing plate 20 are located on the end surface away from the first fixing plate 20. The second fixing plate 21 is installed with a fire extinguishing agent storage tank 26 in the middle of the surface of the second fixing plate 21 close to the first fixing plate 20. The second fixing plate 21 can fix and limit the fire extinguishing agent storage tank 26. The middle of the fire extinguishing agent storage tank 26 close to one end of the first fixing plate 20 is in an open state and is fixed with a connected second connecting pipe 24. A matching solenoid valve 25 is installed at one end of the second connecting pipe 24 away from the fire extinguishing agent storage tank 26, and the solenoid valve 25 is away from the second connecting pipe 2 A first connecting pipe 23 is installed at the interface on one side of 4, and the first connecting pipes 23 are all in a horizontal state and pass through the corresponding position on the first induced draft tube 14; a plurality of matching second retention holes 9 are spaced apart on the inner annular surface of the second induced draft tube 15 corresponding to the middle part of the photovoltaic grid-connected cabinet body 1 near one end of the second induced draft tube 15, and the second retention holes 9 all pass through the inner surface and the outer surface of the corresponding position on the photovoltaic grid-connected cabinet body 1, and a plurality of matching second through holes 29 are spaced apart on the side of the first induced draft tube 14 near the fire extinguishing agent storage tank 26 corresponding to the first connecting pipe 23, and the second through holes 29 on the first induced draft tube 14 are fixedly connected and sealed with the corresponding position on the outer side of the first connecting pipe 23, and the second through holes 29 on the first induced draft tube 14 can fix and limit the first connecting pipe 23.

[0036] A side of the first induced draft tube 14 close to the second induced draft tube 15 corresponds to the inner annular surface of the second induced draft tube 15 and is provided with a plurality of matching first through holes 28 at intervals. The first through holes 28 help to connect the first induced draft tube 14 with the second induced draft tube 15. The end of the first connecting pipe 23 away from the solenoid valve 25 is located on the inner side of the corresponding second retention hole 9 on the photovoltaic grid-connected cabinet body 1; a fixed block 2 is fixed in the middle of the upper surface of the photovoltaic grid-connected cabinet body 1, and a PLC controller 31 is installed in the middle of the surface of one side of the fixed block 2. The fixed block 2 can fix and limit the PLC controller 31, the temperature sensor 11 and the smoke sensor 12 are electrically connected to the PLC controller 31, the induced draft fan 16 is electrically connected to the PLC controller 31, and the solenoid valve 25 is electrically connected to the PLC controller 31.

[0037] A plurality of first retention holes 8 are provided at intervals corresponding to the moving block 7 in the middle of the photovoltaic grid-connected cabinet body 1 near one end of the moving block 7. The first retention holes 8 all penetrate the inner surface and the outer surface of the corresponding position on the photovoltaic grid-connected cabinet body 1. The first retention holes 8 on the photovoltaic grid-connected cabinet body 1 are located on the outer side of the moving block 7 and are fixed with matching frame-type limit pads 13. The frame-type limit pads 13 help to limit the first retention holes 8 on the photovoltaic grid-connected cabinet body 1 and the moving block 7. The temperature sensors 11 all penetrate the two side surfaces of the corresponding position on the moving block 7, and the smoke sensors 12 all penetrate the two side surfaces of the corresponding position on the moving block 7. A moving plate is fixed between the side surfaces of the moving block 7 away from the photovoltaic grid-connected cabinet body 1. 6, the movable plate 6 is in a vertical state, and a rotating rod 4 is rotatably installed on the middle part of the upper end of the movable plate 6 corresponding to the middle part of the fixed block 2. The rotating rod 4 passes through the two side surfaces of the corresponding positions on the movable plate 6, and the outer side of the outer ring surface of the rotating rod 4 is rotatably connected with the corresponding position on the movable plate 6 through a bearing, and the movable plate 6 helps to rotate and limit the rotating rod 4; a screw 3 is fixed on the end surface of the rotating rod 4 close to the fixed block 2, and the screw 3 is threadedly inserted into the corresponding position on the fixed block 2, and a rotating block 5 is fixed on the end surface of the rotating rod 4 away from the screw 3. A plurality of protrusions 30 are fixed on the outer ring surface of the rotating block 5 at intervals in the circumferential direction. The protrusions 30 can prevent the outer ring surface of the rotating block 5 from slipping, so as to facilitate the stable rotation of the rotating block 5.

[0038] A plurality of third retention holes 10 are provided in the middle of one side surface of the photovoltaic grid-connected cabinet body 1 corresponding to the distributed grid intervals on the photovoltaic grid-connected cabinet body 1. The third retention holes 10 all penetrate the inner surface and the outer surface of the corresponding position on the photovoltaic grid-connected cabinet body 1. A matching second porous mesh plate 19 is fixed in the third retention holes 10 on the photovoltaic grid-connected cabinet body 1. The second porous mesh plate 19 can shield and protect the third retention holes 10 on the photovoltaic grid-connected cabinet body 1; a fixing rod 17 is fixed in the middle of the surface around the induced draft fan 16, and the end of the fixing rod 17 away from the induced draft fan 16 is fixedly connected to the corresponding position on the inner ring surface of the first induced draft tube 14, and a first porous mesh plate 18 is fixed to the upper end of the inner ring surface of the first induced draft tube 14. The first porous mesh plate 18 can shield and protect the inside of the first induced draft tube 14.

[0039] The working principle of the present invention: during use, the lower surface of the photovoltaic grid-connected cabinet body 1 is aligned with the position where the outside world needs to install, so that the lower surface of the photovoltaic grid-connected cabinet body 1 matches and fits with the position where the outside world needs to install, and the photovoltaic grid-connected cabinet body 1 is installed between the position where the outside world needs to install, which helps to stably use the photovoltaic grid-connected cabinet body 1. The photovoltaic grid-connected cabinet body 1 can support and limit the various components assembled on the photovoltaic grid-connected cabinet body 1, which is convenient for the stable use of the various components assembled on the photovoltaic grid-connected cabinet body 1.

[0040] The photovoltaic grid-connected cabinet body 1 is opened to use the photovoltaic grid-connected cabinet body 1. When the photovoltaic grid-connected cabinet body 1 is used, heat will be generated in the photovoltaic grid-connected cabinet body 1. The temperature sensor 11 and the smoke sensor 12 on the movable block 7 are opened. The movable block 7 can fix and limit the temperature sensor 11 and the smoke sensor 12, which is helpful for stably using the temperature sensor 11 and the smoke sensor 12. When the temperature sensor 11 is opened, the temperature sensor 11 can detect the temperature in the corresponding distributed grid on the photovoltaic grid-connected cabinet body 1. The temperature sensor 11 can transmit the detected temperature data information to the PLC controller 31 on the fixed block 2. The fixed block 2 can fix and limit the PLC controller 31, which is convenient for stably using the PLC controller 31.

[0041] When the temperature sensor 11 detects that the temperature inside the photovoltaic grid-connected cabinet body 1 is higher than 40°C, the PLC controller 31 will open the induced draft fan 16 on the fixing rod 17, and the first induced draft fan 16 can be fixed and limited by the fixing rod 17, which is helpful for the stable use of the induced draft fan 16. When the induced draft fan 16 is turned on, the induced draft fan 16 can draw air from the outside through the first induced draft fan 14 and the first porous mesh plate 18, and the first porous mesh plate 18 can block and protect the top of the first induced draft fan 14 to prevent dirt or foreign matter from entering the first induced draft fan 14 and affecting the In use, the induced draft fan 16 can form the extracted air into an airflow and blow it into the photovoltaic grid-connected cabinet body 1 through the first through hole 28 on the first induced draft tube 14, the second induced draft tube 15 and the second retention hole 9 on the photovoltaic grid-connected cabinet body 1, so as to promote the flow of air in the photovoltaic grid-connected cabinet body 1, so that the air in the photovoltaic grid-connected cabinet body 1 carries heat and is discharged through the second porous mesh plate 19 in the third retention hole 10 on the photovoltaic grid-connected cabinet body 1, which helps to dissipate heat in the photovoltaic grid-connected cabinet body 1, and the second porous mesh plate 19 can shield and protect the third retention hole 10 on the photovoltaic grid-connected cabinet body 1.

[0042] When the smoke sensor 12 is turned on, the smoke sensor 12 can detect whether there is smoke in the photovoltaic grid-connected cabinet body 1. When a short circuit occurs in the photovoltaic grid-connected cabinet body 1, smoke will be generated. When the smoke sensor 12 detects that smoke appears in the corresponding distributed grid in the photovoltaic grid-connected cabinet body 1, the smoke sensor 12 will open the corresponding solenoid valve 25 through the PLC controller 31. When the solenoid valve 25 is turned on, the fire extinguishing agent in the corresponding fire extinguishing agent storage tank 26 will be sprayed into the corresponding distributed grid on the photovoltaic grid-connected cabinet body 1 through the second connecting pipe 24, the solenoid valve 25 and the first connecting pipe 23, so as to extinguish the fire in the corresponding distributed grid on the photovoltaic grid-connected cabinet body 1, which is conducive to the safe use of the photovoltaic grid-connected cabinet body 1.

[0043] When the temperature sensor 11 and the smoke sensor 12 need to be disassembled, repaired or replaced, the rotating block 5 is rotated by the protrusion 30. The protrusion 30 can prevent the outer ring surface of the rotating block 5 from slipping, so as to facilitate the stable rotation of the rotating block 5. When the rotating block 5 rotates, the screw 3 can be driven to rotate by the rotating rod 4. When the screw 3 rotates, it will move along the fixed block 2 that is threadedly connected, so that the screw 3 drives the moving plate 6 to move in a direction away from the photovoltaic grid-connected cabinet body 1 through the rotating rod 4. When the moving plate 6 moves, it can drive the moving block 7 to move along the inner side of the inner frame-type limit pad 13 corresponding to the first retention hole 8 on the photovoltaic grid-connected cabinet body 1. When the moving block 7 moves, it can drive the temperature sensor 11 and the smoke sensor 12 to move, so as to facilitate the removal of the temperature sensor 11 and the smoke sensor 12, which is helpful for the disassembly, repair or replacement of the temperature sensor 11 and the smoke sensor 12.

[0044] During use, it helps to dissipate heat inside the photovoltaic grid-connected cabinet main body 1. After using the photovoltaic grid-connected cabinet main body 1 for a long time, it can conveniently dissipate the heat generated inside the photovoltaic grid-connected cabinet main body 1 to prevent the heat generated inside the photovoltaic grid-connected cabinet main body 1 from causing malfunctions inside the photovoltaic grid-connected cabinet main body 1, and help to ensure the service life of electrical components in the photovoltaic grid-connected cabinet main body 1, so as to facilitate the use of the photovoltaic grid-connected cabinet main body 1.

[0045] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A low-voltage distributed photovoltaic grid-connected cabinet, comprising a photovoltaic grid-connected cabinet body (1), characterized in that: A plurality of distributed grids are arranged at intervals along the vertical direction on the photovoltaic grid-connected cabinet body (1); a plurality of moving blocks (7) are installed at the middle of one end of the photovoltaic grid-connected cabinet body (1) corresponding to the distributed grids on the photovoltaic grid-connected cabinet body (1); a temperature sensor (11) is installed at the middle of the upper side of the moving blocks (7); a smoke sensor (12) is installed at the middle of the lower side of the moving blocks (7); a plurality of second induced draft tubes (15) connected to the photovoltaic grid-connected cabinet body (1) are fixed at the middle of the surface of one end of the photovoltaic grid-connected cabinet body (1) away from the moving blocks (7) corresponding to the distributed grids on the photovoltaic grid-connected cabinet body (1); a first induced draft tube (14) connected to the photovoltaic grid-connected cabinet body (1) is fixed between the ends of the second induced draft tubes (15) away from the photovoltaic grid-connected cabinet body (1); an induced draft fan (16) is installed at the top of the first induced draft tube (14); and a baffle (27) is fixed to the lower surface of the first induced draft tube (14).

2. A low-voltage distributed photovoltaic grid-connected cabinet according to claim 1, characterized in that: The outer side of the outer ring surface of the second induced draft tube (15) is fixed with a first fixing plate (20), the four corners of the surface of the first fixing plate (20) away from the photovoltaic grid-connected cabinet body (1) are fixed with connecting blocks (22), the end surface of the connecting block (22) on the same first fixing plate (20) away from the first fixing plate (20) is commonly fixed with a second fixing plate (21), and the middle part of the surface of the second fixing plate (21) close to the first fixing plate (20) is installed with a fire extinguishing agent storage tank (26), the middle part of the fire extinguishing agent storage tank (26) close to one end of the first fixing plate (20) is in an open state and fixed with a second connecting pipe (24) connected thereto, and a matching solenoid valve (25) is installed at one end of the second connecting pipe (24) away from the fire extinguishing agent storage tank (26), and a first connecting pipe (23) is installed at an interface on one side of the solenoid valve (25) away from the second connecting pipe (24), and the first connecting pipe (23) is in a horizontal state and passes through a corresponding position on the first induced draft tube (14).

3. A low-voltage distributed photovoltaic grid-connected cabinet according to claim 2, characterized in that: A plurality of matching second retention holes (9) are provided at intervals on the inner annular surface of the second air induced draft tube (15) in the middle of the photovoltaic grid-connected cabinet body (1) near one end of the second air induced draft tube (15); the second retention holes (9) all penetrate the inner surface and the outer surface of the corresponding positions on the photovoltaic grid-connected cabinet body (1); a plurality of matching second through holes (29) are provided at intervals on the side of the first air induced draft tube (14) near the fire extinguishing agent storage tank (26) corresponding to the first connecting pipe (23); the second through holes (29) on the first air induced draft tube (14) are fixedly connected to the corresponding positions on the outer side of the first connecting pipe (23) and sealed.

4. A low-voltage distributed photovoltaic grid-connected cabinet according to claim 3, characterized in that: A side of the first induced draft tube (14) close to the second induced draft tube (15) is provided with a plurality of matching first through holes (28) spaced apart from each other on the inner annular surface of the second induced draft tube (15), and an end of the first connecting pipe (23) away from the solenoid valve (25) is located on the inner side of the corresponding second retention hole (9) on the photovoltaic grid-connected cabinet body (1).

5. A low-voltage distributed photovoltaic grid-connected cabinet according to claim 4, characterized in that: A fixed block (2) is fixed in the middle of the upper surface of the photovoltaic grid-connected cabinet body (1), a PLC controller (31) is installed in the middle of the surface of one side of the fixed block (2), the temperature sensor (11) and the smoke sensor (12) are electrically connected to the PLC controller (31), the induced draft fan (16) is electrically connected to the PLC controller (31), and the solenoid valve (25) is electrically connected to the PLC controller (31).

6. A low-voltage distributed photovoltaic grid-connected cabinet according to claim 5, characterized in that: A plurality of first retention holes (8) are provided at intervals corresponding to the moving block (7) in the middle of the photovoltaic grid-connected cabinet body (1) near one end of the moving block (7); the first retention holes (8) all penetrate the inner surface and the outer surface of the corresponding position on the photovoltaic grid-connected cabinet body (1); matching frame-shaped limit pads (13) are fixed on the outer side of the moving block (7) in the first retention holes (8) on the photovoltaic grid-connected cabinet body (1); the temperature sensors (11) all penetrate the two side surfaces of the corresponding position on the moving block (7); and the smoke sensors (12) all penetrate the two side surfaces of the corresponding position on the moving block (7).

7. A low-voltage distributed photovoltaic grid-connected cabinet according to claim 6, characterized in that: A movable plate (6) is fixed between the surfaces of one side of the movable block (7) away from the photovoltaic grid-connected cabinet body (1), the movable plate (6) is in a vertical state, a rotating rod (4) is rotatably mounted in the middle of the upper end of the movable plate (6) corresponding to the middle of the fixed block (2), the rotating rod (4) penetrates the two side surfaces of the corresponding position on the movable plate (6), and the outer side of the outer ring surface of the rotating rod (4) is rotatably connected to the corresponding position on the movable plate (6) through a bearing.

8. A low-voltage distributed photovoltaic grid-connected cabinet according to claim 7, characterized in that: A screw rod (3) is fixed to one end surface of the rotating rod (4) close to the fixed block (2), and the screw rod (3) is threadedly inserted into a corresponding position on the fixed block (2). A rotating block (5) is fixed to one end surface of the rotating rod (4) away from the screw rod (3), and a plurality of protrusions (30) are fixed on the outer ring surface of the rotating block (5) at intervals in the circumferential direction.

9. A low-voltage distributed photovoltaic grid-connected cabinet according to claim 8, characterized in that: A plurality of third retention holes (10) are provided in the middle of one side surface of the photovoltaic grid-connected cabinet body (1) at intervals corresponding to the distributed grid openings on the photovoltaic grid-connected cabinet body (1); the third retention holes (10) all penetrate the inner surface and the outer surface at corresponding positions on the photovoltaic grid-connected cabinet body (1); and matching second porous mesh plates (19) are fixed in the third retention holes (10) on the photovoltaic grid-connected cabinet body (1).

10. A low-voltage distributed photovoltaic grid-connected cabinet according to claim 9, characterized in that: A fixing rod (17) is fixed in the middle of the surface of the induced draft fan (16) on all sides, and the end of the fixing rod (17) away from the induced draft fan (16) is fixedly connected to a corresponding position on the inner ring surface of the first induced draft tube (14), and a first porous mesh plate (18) is fixed to the upper end of the inner ring surface of the first induced draft tube (14).

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