A low-voltage distributed photovoltaic grid-connected cabinet

Abstract

This invention discloses a low-voltage distributed photovoltaic grid-connected cabinet, relating to the field of grid-connected cabinet technology. It includes a grid-connected main body, connecting components for connecting terminals between devices; splicing components for installing the spliced ​​components inside the grid-connected cabinet and supporting the connecting components; adjusting components for adjusting the position of the connecting components according to different terminal positions; a resetting component for separating the device terminals from the cables; a cooling component for cooling the connection point between the device terminals and the cables; and a fixing component for fixing the connecting components moved to the appropriate position. This invention further solves the problem of cumbersome cable installation and easy cable entanglement caused by the use of threaded terminals to fix cables in traditional low-voltage distributed photovoltaic grid-connected cabinets, where pulling the extension rod allows the conductive terminal on the top of the conductive block to be inserted between the terminal block and the sleeve plate.

Description

Technical Field

[0001] This invention relates to the field of grid-connected cabinet technology, specifically to a low-voltage distributed photovoltaic grid-connected cabinet. Background Technology

[0002] The grid-connected cabinet is used to regulate the operating frequency of the equipment by adjusting the speed of the motor, thereby reducing energy consumption, enabling smooth start-up of the equipment, reducing the damage to the motor caused by the large current generated during direct start-up of the equipment, and avoiding the impact of the large current on the power grid during start-up. It also features analog input, PID control, pump switching control, communication functions, macro functions, and multi-speed control, etc.

[0003] The existing technology has the following problems:

[0004] 1. In the use of existing low-voltage distributed photovoltaic grid-connected cabinets, the power equipment usually uses threaded terminals to fix the cables, which not only makes the cable installation more complicated, but also easily causes the cables to cross and entangle.

[0005] 2. During the use of existing low-voltage distributed photovoltaic grid-connected cabinets, the large number of devices inside the cabinets and the messy cables make subsequent maintenance or dust removal of the cabinets inconvenient. Summary of the Invention

[0006] This invention provides a low-voltage distributed photovoltaic grid-connected cabinet to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0008] A low-voltage distributed photovoltaic grid-connected cabinet includes a grid-connected main body.

[0009] Connection components are used to connect terminals between devices;

[0010] The splicing assembly is used to install the assembled components inside the grid-connected cabinet and to support the connecting components;

[0011] An adjustment component is used to adjust the position of the connecting component according to the different positions of the terminals;

[0012] A reset assembly is used to disconnect the device terminals from the cable;

[0013] Cooling components are used to cool the connection points between equipment terminals and cables;

[0014] A fixing component is used to secure the connecting components when they are moved to a suitable position.

[0015] A further improvement of the technical solution of the present invention is that: door panels are rotatably connected to both sides of the outer wall of the grid-connected main body, and an installation frame is slidably connected to the inner wall of the grid-connected main body; an installation plate is fixedly connected to one side of the outer wall of the installation frame; and a circuit breaker, an anti-islanding protection device, an online power quality monitoring device, a power meter, a current transformer, and a network power meter are installed on one side of the outer wall of the installation plate.

[0016] A further improvement of the technical solution of the present invention is that: the splicing component includes a plurality of limiting boxes fixedly connected to the inner wall of the mounting frame, and the inner wall of the limiting box is slidably connected to a limiting plate, while the top of the limiting plate is slidably connected to a movable box.

[0017] A further improvement of the technical solution of the present invention is that: the adjustment component includes a connecting box slidably connected to the inner wall of the movable box, and a support plate is fixedly connected to both ends of the top of the connecting box; an insulating block is slidably connected to one side of the inner wall of the support plate, and a conductive block is fixedly connected to the inner wall of the insulating block; a conductive terminal is fixedly connected to the top of the conductive block, and a terminal block is snapped into the top of the conductive terminal; a sleeve is threadedly connected to one side of the outer wall of the terminal block, and the top of the sleeve is fixedly connected to the bottom of the current transformer.

[0018] A further improvement of the technical solution of the present invention is that: the connecting component includes an extension tube slidably connected to one side of the inner wall of the connecting box, and a return spring is attached to the outer wall of the extension tube, and one end of the return spring is fixedly connected to one side of the inner wall of the connecting box, and an irregularly shaped push block is fixedly connected to the end of the outer wall of the extension tube away from the return spring, and the two sides of the outer wall of the irregularly shaped push block are slidably connected to the inner wall of the support plate.

[0019] A further improvement of the technical solution of the present invention is that: a limiting groove is formed on the inner wall of the extension tube, and an extension rod is slidably connected to the inner wall of the limiting groove, and one end of the outer wall of the extension rod is slidably connected to one side of the inner wall of the movable box.

[0020] A further improvement of the technical solution of the present invention is that: the reset assembly includes an elastic reset box fixedly connected to the inner wall of the support plate near the insulating block, and a slide rod is slidably connected to the inner wall of the elastic reset box, and a traction frame is fixedly connected to one end of the slide rod. One side of the outer wall of the traction frame is fixedly connected to the bottom of one side of the outer wall of the insulating block, and the side of the outer wall of the traction frame away from the insulating block is slidably connected to the outer wall of the irregular push block.

[0021] A further improvement of the technical solution of the present invention is that: the cooling component includes a miniature fan fixedly connected to one end of the top of the support plate, and two ends of the outer wall of the miniature fan are fixedly connected to a diversion hose, one end of the diversion hose is fixedly connected to an exhaust fan, and the bottom of the exhaust fan is fixedly connected to the end of the top of the support plate away from the miniature fan.

[0022] A further improvement of the technical solution of the present invention is that: the fixing component includes several slots formed on both sides of the outer wall of the movable box, and the inner wall of the slot is engaged with a limiting block, and one end of the outer wall of the limiting block is rotatably connected to the outer wall of the support plate.

[0023] A further improvement of the technical solution of the present invention is that: a connecting terminal is fixedly connected to one side of the inner wall of the conductive block, and a connecting wire is inserted into the outer wall of the connecting terminal, and one end of the outer wall of the connecting wire is slidably connected to one end of the inner cavity of the movable box.

[0024] Due to the adoption of the above technical solution, the technical progress achieved by this invention compared to the prior art is as follows:

[0025] 1. This invention provides a low-voltage distributed photovoltaic grid-connected cabinet. By fixing the limiting box between the mounting brackets, and then installing the same number of movable boxes on both sides of the limiting plate according to the number of power device terminals, the limiting plate with the movable boxes installed is inserted into the limiting box, so that the connecting box on its inner wall is aligned with the terminal of the power device. By pulling the extension rod, the extension rod drives the extension tube, so that the conductive terminal on the top of the conductive block is inserted between the terminal and the sleeve plate. This further solves the problem that in the traditional low-voltage distributed photovoltaic grid-connected cabinet, the power device usually uses threaded terminals to fix the cables, which not only makes the cable installation more complicated, but also easily causes the cables to cross and entangle.

[0026] 2. This invention provides a low-voltage distributed photovoltaic grid-connected cabinet. By rotating the extension rod counterclockwise by 30 degrees, the locking block and extension rod are retracted into the moving box under the action of the return spring, and one end of the extension tube is attached to one side of the inner wall of the connecting box. At this time, the traction frame is released from the restriction of the irregular push block, and the elastic return box set on the inner wall of the support plate near the insulating block is used to pull the traction frame through the sliding rods set on both ends of the outer wall of the traction frame. This causes the traction frame to drive the insulating block to move downward in the support plate, and the conductive terminal is released from contact with the terminal block and the sleeve plate, thereby realizing power disconnection. This further solves the problem that in the process of using traditional low-voltage distributed photovoltaic grid-connected cabinets, due to the large number of devices and messy cables inside the grid-connected cabinet, subsequent maintenance or dust removal of the grid-connected cabinet is inconvenient. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the limiting plate structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the movable box structure of the present invention;

[0031] Figure 5 This is a schematic diagram of the top surface of the movable box of the present invention;

[0032] Figure 6 This is a schematic cross-sectional view of the movable box of the present invention;

[0033] Figure 7 This is a schematic diagram of the connecting box structure of the present invention;

[0034] Figure 8 This is a schematic cross-sectional view of the extension tube of the present invention;

[0035] Figure 9 This is a schematic cross-sectional view of the insulating block of the present invention;

[0036] Figure 10 For the present invention Figure 7 Enlarged diagram of point A in the middle.

[0037] In the diagram: 1. Grid-connected main body; 2. Door panel; 3. Mounting frame; 4. Mounting plate; 5. Circuit breaker; 6. Anti-islanding protection device; 7. Online power quality monitoring device; 8. Power meter; 9. Current transformer; 10. Network power meter; 11. Limit box; 12. Limit plate; 13. Moving box; 14. Connection box; 15. Support plate; 16. Insulating block; 17. Conductive block; 18. Conductive terminal; 19. Terminal block; 20. Sleeve plate; 21. Extension tube; 22. Return spring; 23. Irregular push block; 24. Limit groove; 25. Extension rod; 26. Elastic return box; 27. Sliding rod; 28. Traction frame; 29. ​​Miniature fan; 30. Diverter hose; 31. Exhaust fan; 32. Slot; 33. Limit block; 34. Connection terminal; 35. Connection wire. Detailed Implementation

[0038] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0039] like Figures 1 to 10As shown in the figure, a low-voltage distributed photovoltaic grid-connected cabinet according to an embodiment of the present invention includes a grid-connected main body 1, a connecting component for connecting terminals between devices; a splicing component for installing the spliced ​​components inside the grid-connected cabinet and supporting the connecting component; an adjusting component for adjusting the position of the connecting component according to the different terminal positions; a resetting component for separating the device terminals from the cables; a cooling component for cooling the connection between the device terminals and the cables; and a fixing component for fixing the connecting component moved to a suitable position. Door panels 2 are rotatably connected to both sides of the outer wall of the main body 1, and mounting brackets 3 are slidably connected to the inner wall of the grid-connected main body 1. Mounting plate 4 is fixedly connected to one side of the outer wall of the mounting bracket 3, and circuit breaker 5, anti-islanding protection device 6, power quality online monitoring device 7, power meter 8, current transformer 9 and network power meter 10 are installed on one side of the outer wall of the mounting plate 4. The splicing assembly includes several limiting boxes 11 fixedly connected to the inner wall of the mounting bracket 3, and limiting plates 12 are slidably connected to the inner wall of the limiting boxes 11, while a movable box 13 is slidably connected to the top of the limiting plates 12.

[0040] During operation, the door panels 2 on both sides of the outer wall of the grid-connected main body 1 are opened, and the mounting plate 4 is fixed inside the grid-connected main body 1. Then, the circuit breaker 5, anti-islanding protection device 6, power quality online monitoring device 7, power meter 8, current transformer 9, and network power meter 10 are fixed on one side of the mounting plate 4. Then, several mounting brackets 3 are installed between the power devices, and the limit boxes 11 are fixed between the mounting brackets 3. Then, according to the number of power device terminals, the same number of movable boxes 13 are installed on the front and back sides of the limit plate 12, and the limit plate 12 with the movable boxes 13 installed is inserted into the limit box 11. At this time, the operator adjusts the movable boxes 13 so that the connecting boxes 14 on their inner walls are aligned with the power devices. At the terminal of the force device, press the limiting blocks 33 provided on both sides of the outer wall of the support plate 15, so that one end of the limiting block 33 is embedded in the slots 32 provided on both sides of the outer wall of the movable box 13, and fix the connecting box 14. By providing an insulating block 16 on one side of the inner wall of the support plate 15, insert one end of the connecting wire 35 into the conductive block 17 provided on the inner wall of the insulating block 16. At this time, by pulling the extension rod 25 and rotating it thirty degrees, the extension rod 25 drives the extension tube 21, and the irregular push block 23 provided on one end of the outer wall of the extension tube 21 pushes the traction frame 28 provided on one side of the outer wall of the insulating block 16, so that the traction frame 28 slides on the surface of the irregular push block 23 and drives the insulating block 16 to move upward, so that the top of the conductive block 17 is provided with The conductive terminal 18 is inserted between the terminal block 19 and the sleeve 20 (here, the conductive terminal 18, terminal block 19, and sleeve 20 are matching parts). Because the surface of the conductive terminal 18 is curved, wear on the terminal block 19 and sleeve 20 is avoided when the conductive terminal 18 moves upward. This allows power to enter the conductive terminal 18 through the terminal block 19 and sleeve 20, and then through the conductive terminal 18 into the connecting wire 35. Since the bottom surface of the limiting plate 12 is also equipped with a movable box 13, and the other end of the connecting wire 35 is installed in the bottom conductive block 17, power flows along the conductive terminal 18 on the bottom surface into the next power device. When a short circuit occurs at the power device terminal, the circuit is interrupted by rotating the extension... The extension rod 25 is extended so that the locking block at one end of its outer wall is released from its restriction. The return spring 22 at one end of the inner wall of the moving box 13 is used to reset the extension tube 21 and the extension rod 25. The traction frame 28 is released from the restriction of the irregular push block 23. Under the influence of its weight, the conductive terminal 18 is retracted between the support plate 15 and disconnected from the terminal block 19 and the sleeve plate 20. At this time, the operator uses a test pen and other devices to test the terminal block 19 corresponding to the power device. This further solves the problem that in the process of using traditional low-voltage distributed photovoltaic grid-connected cabinets, the power device usually uses threaded terminals to fix the cables, which not only makes the cable installation more complicated, but also easily causes the cables to cross and entangle.

[0041] The adjustment assembly includes a connecting box 14 slidably connected to the inner wall of the movable box 13, with support plates 15 fixedly connected to both ends of the top of the connecting box 14. An insulating block 16 is slidably connected to one side of the inner wall of the support plate 15, and a conductive block 17 is fixedly connected to the inner wall of the insulating block 16. A conductive terminal 18 is fixedly connected to the top of the conductive block 17, and a terminal post 19 is snapped onto the top of the conductive terminal 18. A sleeve plate 20 is threadedly connected to one side of the outer wall of the terminal post 19, and the top of the sleeve plate 20 is fixedly connected to the bottom of the current transformer 9. A connecting terminal 34 is fixedly connected to one side of the inner wall of the conductive block 17, and a connecting wire 35 is inserted into the outer wall of the connecting terminal 34. One end of the outer wall of the connecting wire 35 is slidably connected to one end of the inner cavity of the movable box 13. The connection assembly includes an extension tube 21 slidably connected to one side of the inner wall of the connecting box 14, and a return spring 22 is attached to the outer wall of the extension tube 21. One end of the return spring 22 is fixedly connected to one side of the inner wall of the connecting box 14. A shaped push block 23 is fixedly connected to the end of the outer wall of the extension tube 21 away from the return spring 22, and the two sides of the outer wall of the shaped push block 23 are slidably connected to the inner wall of the support plate 15. A limiting groove 24 is formed on the inner wall of the extension tube 21, and an extension rod 25 is slidably connected to the inner wall of the limiting groove 24. One end of the outer wall of the extension rod 25 is slidably connected to one side of the inner wall of the movable box 13. The reset assembly includes an elastic reset box 26 fixedly connected to the inner wall of the support plate 15 near the insulating block 16, and the elastic reset box 26... The inner wall of the sliding box 13 is slidably connected to a slide rod 27, and one end of the slide rod 27 is fixedly connected to a traction frame 28. One side of the outer wall of the traction frame 28 is fixedly connected to the bottom of one side of the outer wall of the insulating block 16, and the side of the outer wall of the traction frame 28 away from the insulating block 16 is slidably connected to the outer wall of the irregular push block 23. The fixing component includes several slots 32 opened on both sides of the outer wall of the movable box 13, and the inner wall of the slot 32 is engaged with a limit block 33, and one end of the outer wall of the limit block 33 is rotatably connected to the outer wall of the support plate 15.

[0042] During operation, a connecting box 14 is installed on the inner wall of the movable box 13, and support plates 15 are respectively installed at both ends of the top of the connecting box 14. Since the wiring terminals of the power devices are at different positions, the connecting box 14 is slidably moved within the movable box 13 to a suitable position. The limiting block 33 provided at one end of the outer wall of the support plate 15 is then pried open, so that one end of the limiting block 33 is embedded in the slot 32 provided on the outer wall of the movable box 13, thus fixing the movable box 13. Subsequently, according to the position of the slot 32 into which the limiting block 33 is embedded, since an extension tube 21 is provided on one side of the inner wall of the connecting box 14, a limiting groove 24 is provided on the inner wall of the extension tube 21, and several grooves are provided on the inner wall of the limiting groove 24. The distance between the grooves and the distance between the slots 32 and the slot 32 are determined. Corresponding to the distance between 2, taking the moving box 14 to one end of the inner wall of the moving box 13 as an example, by rotating the extension rod 25 and turning it 90 degrees clockwise, one end of the extension rod 25 rotates within the limiting groove 24, and the stop block at one end of the extension rod 25 passes through the groove provided on the inner wall of the limiting groove 24 and moves towards one end of its inner wall until one side of the outer wall of the connecting box 14 is in contact with the inner wall of the moving box 13. At this time, rotate the extension rod 25 and turn it 90 degrees counterclockwise, so that the stop block at one end of its end disengages from the groove and is placed in the annular groove provided in the limiting groove 24. Then, pull the extension rod 25 so that the locking block at the end of the extension rod 25 away from the extension tube 21 passes through the moving box 13, and pulls the extension tube 21 to move within the connecting box 14, so that the extension tube... 21. The return spring 22 provided on one side of the inner wall of the connection box 14 is squeezed, thereby causing the extension tube 21 to slide within the support plate 15, moving the irregularly shaped push block 23 located away from the end of the return spring 22. Since an insulating block 16 is provided on one side of the inner wall of the support plate 15, and a traction frame 28 is provided on one side of the outer wall of the insulating block 16, when the irregularly shaped push block 23 moves continuously, its inclined surface continuously pushes the traction frame 28, causing the traction frame 28 to drive the insulating block 16 to move upward continuously. By providing a conductive block 17 on the inner wall of the insulating block 16 and a conductive terminal 18 on the top of the conductive block 17, the conductive terminal 18, during its continuous upward movement, uses its arc surface to insert between the terminal post 19 and the sleeve plate 20, thus allowing the power device to move upward. The current flows through the conductive terminal 18 into the conductive block 17. Since a connecting terminal 34 is provided on one side of the inner wall of the conductive block 17, and a connecting wire 35 is installed on the outer wall of the connecting terminal 34, the current flows through the connecting terminal 34 into the connecting wire 35 and is transmitted through the connecting wire 35. At this time, the extension rod 25 is rotated 30 degrees clockwise again, and the locking block secures the extension rod 25. When the electrical device terminal is damaged, rotating the extension rod 25 30 degrees counterclockwise causes the locking block and extension rod 25 to retract into the moving box 13 under the return force of the return spring 22, and one end of the extension tube 21 is brought into contact with one side of the inner wall of the connecting box 14. At this time, the traction frame 28 is released from the restriction of the irregular push block 23.The elastic reset box 26, located on the inner wall of the support plate 15 near the insulating block 16, is used for traction via sliding rods 27 at both ends of the outer wall of the traction frame 28. This causes the traction frame 28 to move the insulating block 16 downwards within the support plate 15, disengaging the conductive terminal 18 from the terminal block 19 and sleeve plate 20, thus de-energizing the system. When dust removal and cleaning of the grid-connected cabinet are required, the above operation is repeated to quickly disassemble the cables. Then, the limiting plates 12, which house several movable boxes 13, are removed sequentially, leaving only the mounting frame 3, mounting plate 4, and limiting boxes 11 inside the grid-connected main body 1. An air gun is then used to spray and clean the grid-connected main body 1, the removed limiting plates 12, and the movable boxes 13. This further solves the problem of inconvenience caused by numerous devices and messy cables inside traditional low-voltage distributed photovoltaic grid-connected cabinets during use, which hinders subsequent maintenance or dust removal.

[0043] The cooling component includes a miniature fan 29 fixedly connected to one end of the top of the support plate 15, and two ends of the miniature fan 29 are fixedly connected to a diversion hose 30 on one side of the outer wall. One end of the diversion hose 30 is fixedly connected to an exhaust fan 31, and the bottom of the exhaust fan 31 is fixedly connected to the end of the top of the support plate 15 away from the miniature fan 29.

[0044] During operation, a miniature fan 29 is installed at one end of the top of the support plate 15, and a diversion hose 30 is installed at both ends on one side of the outer wall of the miniature fan 29. The diversion hose 30 is used to send air into the exhaust fan 31 installed at one end, so that the air discharged by the exhaust fan 31 blows towards the connection between the conductive terminal 18 and the terminal block 19 and the sleeve plate 20, and cools it down, so as to avoid the problem of high temperature at the terminal connection and damage.

[0045] The working principle of this low-voltage distributed photovoltaic grid-connected cabinet will be explained in detail below.

[0046] like Figures 1-10As shown, by pulling open the door panels 2 on both sides of the outer wall of the grid-connected main body 1 and fixing the mounting plate 4 inside the grid-connected main body 1, the circuit breaker 5, anti-islanding protection device 6, power quality online monitoring device 7, power meter 8, current transformer 9, and network power meter 10 are then fixed on one side of the mounting plate 4. Several mounting brackets 3 are then installed between the power devices, and the limit boxes 11 are fixed between the mounting brackets 3. Then, according to the number of power device terminals, the same number of movable boxes 13 are installed on both sides of the limit plate 12, and the limit plate 12 with the movable boxes 13 installed is inserted into the limit box 11. At this time, the operator adjusts the movable boxes 13 so that the connecting boxes 14 on their inner walls are aligned with the power supply. At the terminal of the device, press the limiting blocks 33 on both sides of the outer wall of the support plate 15, so that one end of the limiting block 33 is embedded in the slots 32 on both sides of the outer wall of the movable box 13, and fix the connecting box 14. By setting an insulating block 16 on one side of the inner wall of the support plate 15, insert one end of the connecting wire 35 into the conductive block 17 set on the inner wall of the insulating block 16. At this time, by pulling the extension rod 25 and rotating it 30 degrees, the extension rod 25 drives the extension tube 21, and the irregular push block 23 set on one end of the outer wall of the extension tube 21 pushes the traction frame 28 set on one side of the outer wall of the insulating block 16, so that the traction frame 28 slides on the surface of the irregular push block 23 and drives the insulating block 16 to move upward, so that the conductive block 17 set on the top of the conductive block 17... The electrical terminal 18 is inserted between the terminal block 19 and the sleeve 20 (here, the conductive terminal 18, terminal block 19, and sleeve 20 are matching parts). Because the surface of the conductive terminal 18 is curved, wear on the terminal block 19 and sleeve 20 is avoided when the conductive terminal 18 moves upward. This allows power to enter the conductive terminal 18 through the terminal block 19 and sleeve 20, and then through the conductive terminal 18 into the connecting wire 35. Since the bottom surface of the limiting plate 12 is also equipped with a movable box 13, and the other end of the connecting wire 35 is installed in the bottom conductive block 17, power flows along the conductive terminal 18 on the bottom surface into the next electrical device. When a short circuit occurs at the terminal of the electrical device, it is extended by rotation. The rod 25 is released from the restraint of the locking block at one end of its outer wall, and the return spring 22 at one end of the inner wall of the moving box 13 is used to reset the extension tube 21 and the extension rod 25. The traction frame 28 is released from the restraint of the irregular push block 23, and the conductive terminal 18 is pulled into the support plate 15 under the influence of its weight, and is disconnected from the connection between the terminal block 19 and the sleeve plate 20. At this time, the operator uses a test pen and other devices to test the terminal block 19 corresponding to the power device. This further solves the problem that in the process of using traditional low-voltage distributed photovoltaic grid-connected cabinets, the power device usually uses threaded terminals to fix the cables, which not only makes the cable installation more complicated, but also makes the cables easy to cross and entangle.

[0047] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A low voltage distributed photovoltaic grid connected cabinet, characterized in that: The grid-connected main body (1) is provided with a door plate (2) rotatably connected to the two sides of the outer wall of the grid-connected main body (1), and an installation rack (3) slidably connected to the inner wall of the grid-connected main body (1). The splicing assembly includes a plurality of limiting boxes (11) fixedly connected to the inner wall of the installation rack (3), and a limiting plate (12) slidably connected to the inner wall of the limiting box (11). The adjusting assembly includes a connecting box (14) slidably connected to the inner wall of the moving box (13), and a support plate (15) fixedly connected to the top of the connecting box (14). The connecting assembly includes an extension pipe (21) slidably connected to one side of the inner wall of the connecting box (14), and a reset spring (22) lapped on the outer wall of the extension pipe (21). The reset assembly includes an elastic reset box (26) fixedly connected to the inner wall of the support plate (15) near the side of the insulating block (16), and a sliding rod (27) slidably connected to the inner wall of the elastic reset box (26). The inner wall of the extension pipe (21) is provided with a limiting groove (24), and the inner wall of the limiting groove (24) is slidably connected with an extension rod (25), and one end of the outer wall of the extension rod (25) is slidably connected with the inner wall of the moving box (13). ​ ​ ​ ​ ​ ​ 2. The low-voltage distributed photovoltaic grid-connected cabinet according to claim 1, characterized in that: ​ 3. The low-voltage distributed photovoltaic grid-connected cabinet according to claim 2, characterized in that: The cooling assembly comprises a micro fan (29) fixedly connected at one end of the top of the support plate (15), two ends of one side of the outer wall of the micro fan (29) are fixedly connected with shunt hoses (30), one end of the shunt hose (30) is fixedly connected with an air exhaust device (31), and the bottom of the air exhaust device (31) is fixedly connected with the end of the top of the support plate (15) away from the micro fan (29).

4. The low-voltage distributed photovoltaic grid-connected cabinet according to claim 3, characterized in that: The fixing assembly comprises a plurality of clamping grooves (32) formed in the outer walls of the two sides of the moving box (13), the inner wall of the clamping groove (32) is clamped with a limiting block (33), and the outer wall of the limiting block (33) is rotatably connected with the outer wall of the support plate (15).

5. The low-voltage distributed photovoltaic grid-connected cabinet according to claim 4, characterized in that: One side of the inner wall of the conductive block (17) is fixedly connected with a connecting terminal (34), the outer wall of the connecting terminal (34) is inserted with a connecting wire (35), and one end of the outer wall of the connecting wire (35) is slidably connected with one end of the inner cavity of the moving box (13).

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