A distribution cabinet for distributed photovoltaic power generation

Abstract

The present invention discloses a distribution cabinet for distributed photovoltaic power generation, which relates to the field of distribution cabinets, and includes an outer cabinet, an inner cabinet and a cable, wherein the inner cabinet is movably installed in the outer cabinet, the outer cabinet is buried, and an equipment mounting frame for installing electrical equipment is movably installed in the inner cabinet. It should be noted that in an embodiment of the present invention, the outer cabinet is buried underground, the inner cabinet is installed in the outer cabinet, and the temperature of the inner cabinet is adjusted by the characteristics of the underground being warm in winter and cool in summer, thereby ensuring the safe use of the distribution cabinet; in addition, when a short circuit occurs, the wedge frame pushes the sand out to insulate the cable fire, and the fuse fuses the threaded rod, so that the lifting spring drives the inner cabinet to pop out of the outer cabinet in time, disconnecting the cable from the transfer conductive rod, thereby avoiding further expansion of the fire caused by continuous short circuit, and at the same time, the fire is extinguished by the inner cabinet in the smoke fire extinguisher, thereby achieving full fire extinguishing of the outer cabinet and the inner cabinet.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution cabinets, and in particular to a power distribution cabinet for distributed photovoltaic power generation. Background Art

[0002] Distributed photovoltaic power generation is a power generation system that directly converts solar energy into electrical energy. It achieves the functions of self-generation and self-use and access to the grid by installing photovoltaic modules near the user's site. This power generation method has the following characteristics: the output power is relatively small, and the capacity of distributed photovoltaic power generation systems is usually within several thousand kilowatts. Compared with centralized power stations, their scale has less impact on power generation efficiency and economy, and their environmental benefits are outstanding.

[0003] In distributed photovoltaic power generation systems, distribution cabinets are indispensable equipment. Distribution cabinets transmit the electricity generated by photovoltaic power generation through various electronic equipment inside them. However, distribution cabinets are generally installed on the ground. In addition, since photovoltaic power generation systems are generally installed far away from people, distribution cabinets that are exposed for a long time in the sun and rain are very likely to be exposed to excessively high or low temperatures, causing internal equipment to catch fire due to extreme temperatures. In addition, long-term exposure is also likely to cause rust and aging of distribution cabinets, which in turn may cause water or sand to enter the distribution cabinets, which may easily cause short circuits and fires. Even standing distribution cabinets are easily hit by objects such as cars, making it impossible to guarantee the safe use of distribution cabinets. Once an accident occurs, it is very likely to cause a power outage, resulting in huge economic losses. Summary of the invention

[0004] The purpose of the present invention is to provide a distribution cabinet for distributed photovoltaic power generation to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A power distribution cabinet for distributed photovoltaic power generation, comprising an outer cabinet, an inner cabinet and a cable, wherein the inner cabinet is movably installed in the outer cabinet, the outer cabinet is installed underground, an equipment mounting frame for installing electrical equipment is movably installed in the inner cabinet, and the cable passes through the outer cabinet and is connected to the inner cabinet;

[0007] It also includes a switch assembly, which is connected to the outer cabinet and the inner cabinet, and is used to lift the inner cabinet to the outside of the outer cabinet; the switch assembly includes a lifting frame, which is installed on the bottom side of the inner cabinet, a rotating frame is rotatably installed on the inner wall of the outer cabinet, and the rotating frame is movably installed on the lifting frame, a driving gear is installed on the rotating frame, and a driving rack is meshed on the driving gear, and a threaded rod is rotatably installed on the outer cabinet, and the threaded rod is movably installed on the driving rack;

[0008] It also includes a pull-out assembly, which is installed in the inner cabinet and is used to pull the equipment mounting frame out of the inner cabinet; the pull-out assembly includes a pull-out door panel, two connecting seats are installed on one side of the inner cabinet, the pull-out door panel is rotatably installed on the two connecting seats, and the two sides of the pull-out door panel are respectively in contact with the inner wall of the outer cabinet and the equipment mounting frame;

[0009] It also includes a fire extinguishing assembly, which is installed in the outer cabinet and is used to extinguish a fire in the outer cabinet; the fire extinguishing assembly includes a smoke fire extinguisher and a fire extinguishing box, the smoke fire extinguisher is installed on the top side of the inner cabinet, the fire extinguishing box is installed on one side of the outer cabinet, and the fire extinguishing box is filled with sand, which is used to cover the cable and extinguish and insulate the cable.

[0010] Furthermore, in a preferred embodiment of the present invention, the switch assembly further comprises a plurality of transfer conductive rods, and the plurality of transfer conductive rods are all installed in the inner cabinet;

[0011] A plurality of plug-in bases are installed on the inner wall of the bottom side of the outer cabinet, the cables are connected to the plurality of plug-in bases, and the plurality of transfer conductive rods are respectively plugged into the plurality of plug-in bases.

[0012] Further, in a preferred embodiment of the present invention, two driving spindles are rotatably mounted on the rotating frame, and one of the driving spindles extends into the rotating frame;

[0013] Another driving spindle is rotatably mounted on the inner wall of the outer cabinet, and the rotating frame and the driving gear are both sleeved on the driving spindle;

[0014] A sliding seat is installed on an inner wall of one side of the outer cabinet, a sliding bar is slidably installed in the sliding seat, and the sliding bar is installed on the inner cabinet.

[0015] Further, in a preferred embodiment of the present invention, a threaded groove is provided on the top side of the driving rack, the threaded rod is threadedly installed in the threaded groove, a lifting spring is installed on the bottom side of the driving rack, and the bottom end of the lifting spring is installed on the bottom inner wall of the outer cabinet;

[0016] A limiting strip is installed on an inner wall of one side of the outer cabinet, a lifting strip is slidably installed in the limiting strip, and the lifting strip is installed on the driving rack.

[0017] Furthermore, in a preferred embodiment of the present invention, a pull-out groove is provided at the top end of the threaded rod, the pull-out groove is rectangular, a pull-out rod is movably installed in the pull-out groove, and a driving frame is installed at the top end of the pull-out rod;

[0018] Two plugging rods are installed on the bottom side of the driving frame, and two slots are provided on the outer cabinet, and the two plugging rods are respectively plugged into the two slots.

[0019] Further, in a preferred embodiment of the present invention, the pull-out assembly further comprises a top cover, the top cover is mounted on the top side of the inner cabinet, and two non-powered hoods are mounted on the top cover;

[0020] Sliding grooves are provided on both sides of the inner cabinet, and the equipment mounting frame is slidably mounted in the two sliding grooves. An auxiliary spring is mounted on the inner wall of the sliding groove, and the other end of the auxiliary spring is mounted on the equipment mounting frame.

[0021] Further, in a preferred embodiment of the present invention, a mounting groove is provided on the connecting seat, a connecting shaft is installed on the pull-out door panel, the connecting shaft is rotatably installed in the mounting groove, a torsion spring is sleeved on the connecting shaft, one end of the torsion spring is installed on the inner wall of the mounting groove, and the other end of the torsion spring is installed on the connecting shaft;

[0022] A wedge-shaped groove is provided on one side of the pull-out door panel, and two top wheels are rotatably mounted on the equipment mounting frame, and the top wheels are in contact with the inner wall of the wedge-shaped groove.

[0023] Furthermore, in a preferred embodiment of the present invention, the fire extinguishing assembly further comprises a wedge-shaped frame, the wedge-shaped frame is movably mounted in the fire extinguishing box, and the movement of the wedge-shaped frame is used to push the sand out of the fire extinguishing box;

[0024] A push-out spring is installed on one side of the wedge-shaped frame, and the other end of the push-out spring is installed on the inner wall of the fire extinguishing box.

[0025] Furthermore, in a preferred embodiment of the present invention, a pop-up cover is rotatably mounted on one side of the fire extinguisher box, mounting seats are rotatably mounted on both sides of the pop-up cover, and both mounting seats are mounted on the inner wall of the outer cabinet;

[0026] A clamping frame is rotatably mounted on the inner wall of the outer cabinet, the clamping frame is used to clamp the pop-up cover, a fusible wire is connected to the clamping frame, and the fusible wire is connected to the threaded rod and the cable.

[0027] Furthermore, in a preferred embodiment of the present invention, a push-pull rod is movably connected between the pop-up cover and the wedge-shaped frame, and the wedge-shaped frame moves through the push-pull rod to push the pop-up cover to rotate and open;

[0028] The pop-up cover and the wedge-shaped frame are both equipped with push-pull frames, and two push-pull shafts are rotatably mounted on the push-pull rod, and the two push-pull shafts extend into the two push-pull frames respectively.

[0029] The beneficial effects of a power distribution cabinet for distributed photovoltaic power generation proposed by the present invention are:

[0030] In the present invention, through the reasonable configuration of the inner cabinet and the outer cabinet, the outer cabinet is buried in the ground, and the inner cabinet is installed in the outer cabinet, so that the inner cabinet can be protected from the sun and rain, which may cause damage to the inner cabinet, and the temperature of the inner cabinet can be adjusted by taking advantage of the characteristics of the underground being warm in winter and cool in summer, thereby effectively ensuring the safe use of the distribution cabinet; in addition, through the setting of the switch assembly, when it is necessary to install electrical equipment on the equipment mounting frame or to carry out maintenance, the driving frame can be rotated, so that the lifting frame can drive the inner cabinet to be lifted, and then the inner cabinet can be lifted out of the outer cabinet for easy operation.

[0031] Furthermore, in the present invention, by setting the pull-out assembly, when the inner cabinet is stored in the outer cabinet, the top cover is in close contact with the outer cabinet to ensure the sealing between the outer cabinet and the inner cabinet, and at the same time, the inner cabinet is ventilated through the unpowered hood, so that when the inner cabinet is lifted out of the outer cabinet, the door panel is no longer squeezed by the inner wall of the outer cabinet. At this time, under the rebound force of the auxiliary spring, the equipment mounting frame is pushed to move, and the equipment mounting frame slides in the two sliding grooves, and under the rebound force of the torsion spring, the connecting shaft is driven The pull-out door panel rotates and opens, so that when the inner cabinet is lifted out of the outer cabinet, the equipment mounting rack slides out and the pull-out door panel automatically opens, so that the equipment mounting rack can be easily installed or repaired. In addition, when the inner cabinet is retracted into the outer cabinet, the inner wall of the outer cabinet squeezes the pull-out door panel, so that the pull-out door panel rotates and closes, and the top wheel on the equipment mounting rack is squeezed by the inner wall of the wedge-shaped groove of the pull-out door panel, so that the equipment mounting rack is squeezed and stored in the inner cabinet, and the equipment mounting rack can be automatically recovered.

[0032] Furthermore, in the present invention, through the provision of a fire extinguishing assembly, when a short circuit occurs, the wedge-shaped frame pushes the sand out of the fire extinguishing box, thereby extinguishing the fire in the cable part and insulating it to prevent the fire from further expanding. At the same time, the fusible wire melts the threaded rod, so that the lifting spring drives the driving rack to move downward, thereby causing the inner cabinet to pop out of the outer cabinet in time, disconnecting the cable from the connecting conductive rod, and preventing the fire from further expanding due to continuous short circuits. In addition, by extinguishing the fire in the inner cabinet with a smoke fire extinguisher, the outer cabinet and the inner cabinet can be fully extinguished, thereby avoiding the problem of large-scale economic losses caused by fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the three-dimensional structure of a power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention;

[0034] Figure 2 A schematic cross-sectional structural diagram of an outer cabinet of a power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention;

[0035] Figure 3 A schematic diagram of the structure of the connection between the inner cabinet body and the jacking frame and other structures of a power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention;

[0036] Figure 4 A schematic diagram of a partial cross-sectional structure of a connection between a drive rack and a threaded rod and other structures of a power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention;

[0037] Figure 5 A schematic diagram of the structure of the connection between the inner cabinet body of a power distribution cabinet for distributed photovoltaic power generation and a device mounting frame and other structures provided by an embodiment of the present invention;

[0038] Figure 6 A power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention Figure 5 Schematic diagram of the structure of part A;

[0039] Figure 7 A schematic diagram of the structure of the connection between the inner cabinet body and the pull-out door panel and other structures of a power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention;

[0040] Figure 8 A schematic diagram of the structure of the connection between the pull-out door panel and the connection seat and other structures of a power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention;

[0041] Fig. 9 A schematic diagram of a partial cross-sectional structure of a connection between a pull-out door panel and a connecting seat and other structures of a power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention;

[0042] Fig.10 A schematic diagram of a partial structure of a power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention, wherein the cables and the clamping frame and other structures are connected;

[0043] Fig.11 A schematic diagram of the structure of the connection between a fire extinguishing box and a pop-up cover and other structures of a power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention;

[0044] Fig.12 A schematic structural diagram of the connection between a pop-up cover and push-pull rods and other structures of a power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention.

[0045] In the figure: 1-outer cabinet; 2-inner cabinet; 3-equipment mounting frame; 4-cable; 5-switch assembly; 501-lifting frame; 502-rotating frame; 503-driving rack; 504-driving gear; 505-lifting spring; 506-conducting rod; 507-plug base; 508-limiting bar; 509-lifting bar; 510-threaded groove; 511-threaded rod; 512-driving frame; 513-pull-out rod; 514-pull-out groove; 515-slot; 516-plug-in rod; 517-driving spindle; 518-sliding seat; 519-sliding bar; 6 -Pull-out assembly; 601-pull-out door panel; 602-connecting seat; 603-top cover; 604-unpowered hood; 605-sliding groove; 606-auxiliary spring; 607-wedge-shaped groove; 608-top wheel; 609-connecting shaft; 610-mounting groove; 611-torsion spring; 7-fire extinguishing assembly; 701-smoke fire extinguisher; 702-fire extinguishing box; 703-pop-up cover; 704-mounting seat; 705-clip-on frame; 706-fusible wire; 707-wedge-shaped frame; 708-push-out spring; 709-push-pull frame; 710-push-pull rod; 711-push-pull shaft. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0049] In addition, in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0050] In addition, the terms "horizontal", "vertical", "perpendicular" and the like do not mean that the components are required to be absolutely vertical, but can be slightly tilted. For example, "vertical" only means that its direction is more vertical than "horizontal", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0051] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Please refer to the attached manual Figure 1-12 , a power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention comprises an outer cabinet 1, an inner cabinet 2 and a cable 4, the inner cabinet 2 is movably installed in the outer cabinet 1, the outer cabinet 1 is installed underground, an equipment mounting frame 3 for installing electrical equipment is movably installed in the inner cabinet 2, and the cable 4 passes through the outer cabinet 1 and is connected to the inner cabinet 2;

[0053] And it also includes a switch assembly 5, which is connected to the outer cabinet 1 and the inner cabinet 2, and is used to lift the inner cabinet 2 to the outside of the outer cabinet 1; specifically, the switch assembly 5 includes a lifting frame 501, which is installed on the bottom side of the inner cabinet 2, and a rotating frame 502 is rotatably installed on the inner wall of the outer cabinet 1, and the rotating frame 502 is movably installed on the lifting frame 501, and a driving gear 504 is installed on the rotating frame 502, and a driving rack 503 is meshed on the driving gear 504, and a threaded rod 511 is rotatably installed on the outer cabinet 1, and the threaded rod 511 is movably installed on the driving rack 503.

[0054] It should be noted that, in the embodiment of the present invention, through the setting of the switch assembly 5, when it is necessary to install electrical equipment on the equipment mounting frame 3 or to perform maintenance, the driving frame 512 is pulled to disengage the two insertion rods 516 from the two slots 515. At this time, the driving frame 512 is unlocked, and at the same time, the driving frame 512 moves through the pull-out rod 513 to slide vertically in the pull-out groove 514, and then the driving frame 512 is rotated, so that the pull-out rod 513 drives the threaded rod 511 to rotate, and the threaded rod 511 rotates in the threaded groove 510, and drives the driving frame 512 to rotate. The rack 503 moves, and the driving rack 503 slides vertically on the limiting bar 508 through the lifting bar 509, so that the driving rack 503 drives the driving gear 504 to rotate, and the driving gear 504 rotates to drive the rotating frame 502 to rotate. The rotating frame 502 rotates on a driving spindle 517. At the same time, the rotating frame 502 drives the lifting frame 501 to move through another driving spindle 517, so that the lifting frame 501 drives the inner cabinet body 2 to lift, and then lifts the inner cabinet body 2 out of the outer cabinet body 1 for easy operation.

[0055] Furthermore, a power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention further includes a pull-out assembly 6, which is installed in the inner cabinet 2 and is used to pull the equipment mounting frame 3 out of the inner cabinet 2; specifically, the pull-out assembly 6 includes a pull-out door panel 601, two connecting seats 602 are installed on one side of the inner cabinet 2, the pull-out door panel 601 is rotatably installed on the two connecting seats 602, and the two sides of the pull-out door panel 601 are respectively in contact with the inner wall of the outer cabinet 1 and the equipment mounting frame 3;

[0056] And also includes a fire extinguishing assembly 7, the fire extinguishing assembly 7 is installed in the outer cabinet 1, and the fire extinguishing assembly 7 is used to extinguish the fire of the outer cabinet 1; specifically, the fire extinguishing assembly 7 includes a smoke fire extinguisher 701 and a fire extinguishing box 702, the smoke fire extinguisher 701 is installed on the top side of the inner cabinet 2, the fire extinguishing box 702 is installed on one side of the outer cabinet 1, and the fire extinguishing box 702 is filled with sand, and the sand is used to cover the cable 4 and extinguish and insulate the cable 4. It should be noted that, in the embodiment of the present invention, by setting the pull-out assembly 6, when the inner cabinet 2 is stored in the outer cabinet 1, the top cover 603 is in close contact with the outer cabinet 1 to ensure the sealing between the outer cabinet 1 and the inner cabinet 2, and at the same time, the inner cabinet 2 is ventilated through the non-powered hood 604, and when the inner cabinet 2 is lifted out of the outer cabinet 1, the door panel 601 is no longer squeezed by the inner wall of the outer cabinet 1. At this time, under the rebound force of the auxiliary spring 606, the equipment mounting frame 3 is pushed to move, and the equipment mounting frame 3 slides in the two sliding grooves 605, so under the rebound force of the torsion spring 611, the connecting shaft is driven 609 rotates, so that the pull-out door panel 601 rotates and opens, and then when the inner cabinet 2 is lifted out of the outer cabinet 1, the equipment mounting rack 3 slides out, and the pull-out door panel 601 automatically opens at the same time, so that the equipment mounting rack 3 can be easily installed or repaired; in addition, when the inner cabinet 2 is retracted into the outer cabinet 1, the inner wall of the outer cabinet 1 squeezes the pull-out door panel 601, so that the pull-out door panel 601 rotates and closes, and the top wheel 608 on the equipment mounting rack 3 is squeezed by the inner wall of the wedge-shaped groove 607 of the pull-out door panel 601, so that the equipment mounting rack 3 is squeezed and stored in the inner cabinet 2, and the equipment mounting rack 3 can be automatically recovered;

[0057] It should be further explained that, in the embodiment of the present invention, through the setting of the fire extinguishing assembly 7, when a short circuit occurs, the fuse 706 is quickly fused, and the clamping frame 705 is melted at the same time. At this time, the wedge frame 707 is driven to move under the tensile force of the ejection spring 708. The movement of the wedge frame 707 drives the push-pull rod 710 to move through a push-pull frame 709. The movement of the push-pull rod 710 drives another push-pull frame 709 to move, so that the push-pull frame 709 drives the pop-up cover 703 to rotate and pop open. At the same time, the push-pull rod 710 slides in the two push-pull frames 709 through two push-pull shafts 711. The wedge-shaped frame 707 pushes the sand out of the fire extinguishing box 702, thereby extinguishing the fire on the cable 4 and insulating it to prevent the fire from further spreading. In addition, the fusible wire 706 melts the threaded rod 511, so that the lifting spring 505 drives the driving rack 503 to move downward, thereby causing the inner cabinet 2 to pop out of the outer cabinet 1 in time, disconnecting the cable 4 from the transfer conductive rod 506, and preventing the fire from further spreading due to a continuous short circuit. At the same time, the fire is extinguished on the inner cabinet 2 in the smoke fire extinguisher 701, thereby fully extinguishing the outer cabinet 1 and the inner cabinet 2.

[0058] For further information, please refer to the attached manual. Figure 1-5 and Fig.10 In the embodiment of the present invention, a distribution cabinet for distributed photovoltaic power generation is provided, wherein the switch assembly 5 further comprises a plurality of transfer conductive rods 506, and the plurality of transfer conductive rods 506 are all installed in the inner cabinet 2; in addition, a plurality of plug-in bases 507 are installed on the inner wall of the bottom side of the outer cabinet 1, and the cables 4 are connected to the plurality of plug-in bases 507, and the plurality of transfer conductive rods 506 are respectively plugged into the plurality of plug-in bases 507. It should be noted that in the embodiment of the present invention, when it is necessary to install electrical equipment on the equipment mounting frame 3 or to perform maintenance, the inner cabinet 2 is lifted so that the plurality of transfer conductive rods 506 are separated from the plurality of plug-in bases 507, so as to achieve the purpose of timely power off and ensure the safety when installing or maintaining the equipment; in addition, when the inner cabinet 2 is recovered, the plurality of transfer conductive rods 506 are plugged into the plurality of plug-in bases 507, so as to achieve the function of automatic power connection, thereby ensuring the safety of the distribution cabinet when in use.

[0059] Please continue to refer to the instruction manual Figure 1-5 and Fig.10 , further specifically, in the embodiment of the present invention, two driving spindles 517 are rotatably mounted on the rotating frame 502, one driving spindle 517 extends into the rotating frame 502; the other driving spindle 517 is rotatably mounted on the inner wall of the outer cabinet 1, and the rotating frame 502 and the driving gear 504 are both sleeved on the driving spindle 517;

[0060] In addition, a sliding seat 518 is installed on the inner wall of one side of the outer cabinet 1, and a sliding bar 519 is slidably installed in the sliding seat 518, and the sliding bar 519 is installed on the inner cabinet 2. It should be noted that in the embodiment of the present invention, when the inner cabinet 2 is lifted out of the outer cabinet 1, the driving frame 512 is rotated, thereby driving the driving rack 503 to move, the driving rack 503 drives the driving gear 504 to rotate, and the driving gear 504 rotates to drive the rotating frame 502 to rotate, and the rotating frame 502 rotates on a driving spindle 517. At the same time, the rotating frame 502 drives the lifting frame 501 to move through another driving spindle 517, so that the lifting frame 501 drives the inner cabinet 2 to lift, and then lifts the inner cabinet 2 out of the outer cabinet 1.

[0061] For more details, please refer to the attached manual. Figure 1-12 In the embodiment of the present invention, a thread groove 510 is provided on the top side of the driving rack 503, a threaded rod 511 is threadedly installed in the thread groove 510, a lifting spring 505 is installed on the bottom side of the driving rack 503, and the bottom end of the lifting spring 505 is installed on the bottom inner wall of the outer cabinet 1;

[0062] In addition, a limiting strip 508 is installed on the inner wall of one side of the outer cabinet 1, and a lifting strip 509 is slidably installed in the limiting strip 508, and the lifting strip 509 is installed on the driving rack 503. It should be noted that in the embodiment of the present invention, the driving frame 512 is rotated so that the pull rod 513 drives the threaded rod 511 to rotate, and the threaded rod 511 rotates in the thread groove 510, which can drive the driving rack 503 to move vertically in the limiting strip 508 through the lifting strip 509, so as to achieve the purpose of lifting the inner cabinet 2 out of the outer cabinet 1, and in the event of a fire, the fusible wire 706 melts the threaded rod 511, so that the lifting spring 505 drives the driving rack 503 to move downward, and also lifts the inner cabinet 2 out of the outer cabinet 1, and then separates the inner cabinet 2 from the cable 4, so as to prevent the fire from further expanding.

[0063] Please continue to refer to the instruction manual Figure 1-5 and Fig.10 To be more specific, in the embodiment of the present invention, a pull-out groove 514 is provided at the top of the threaded rod 511, and the pull-out groove 514 is rectangular. A pull-out rod 513 is movably installed in the pull-out groove 514, and a driving frame 512 is installed at the top of the pull-out rod 513; two plug rods 516 are installed on the bottom side of the driving frame 512, and two slots 515 are provided on the outer cabinet 1, and the two plug rods 516 are respectively inserted into the two slots 515. It should be noted that, in the embodiment of the present invention, when the inner cabinet body 2 needs to be lifted out of the outer cabinet body 1, the drive frame 512 is pulled so that the two insertion rods 516 are disengaged from the two slots 515, and the drive frame 512 is unlocked. At the same time, the drive frame 512 moves through the pull-out rod 513 to slide vertically in the pull-out groove 514, and then the drive frame 512 is rotated so that the pull-out rod 513 drives the threaded rod 511 to rotate. The threaded rod 511 rotates in the threaded groove 510, which can drive the drive rack 503 to move, so that the inner cabinet body 2 can be lifted out.

[0064] For further information, please refer to the attached manual. Figure 5-9 , a power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention, the pull-out assembly 6 further includes a top cover 603, the top cover 603 is mounted on the top side of the inner cabinet body 2, and two non-powered hoods 604 are mounted on the top cover 603;

[0065] In addition, both sides of the inner cabinet 2 are provided with sliding grooves 605, and the equipment mounting frame 3 is slidably mounted in the two sliding grooves 605. An auxiliary spring 606 is mounted on the inner wall of the sliding groove 605, and the other end of the auxiliary spring 606 is mounted on the equipment mounting frame 3. It should be noted that in the embodiment of the present invention, when the inner cabinet 2 is stored in the outer cabinet 1, the top cover 603 is in close contact with the outer cabinet 1 to ensure the sealing between the outer cabinet 1 and the inner cabinet 2, and the inner cabinet 2 is ventilated through the non-powered hood 604. When the inner cabinet 2 is lifted out of the outer cabinet 1, the door panel 601 is no longer squeezed by the inner wall of the outer cabinet 1. At this time, under the rebound force of the auxiliary spring 606, the equipment mounting frame 3 is pushed to move, and the equipment mounting frame 3 slides in the two sliding grooves 605, so that the equipment mounting frame 3 slides out of the inner cabinet 2, which is convenient for installing electrical equipment or repairing.

[0066] More specifically, in the embodiment of the present invention, a mounting groove 610 is provided on the connecting seat 602, a connecting shaft 609 is installed on the pull-out door panel 601, the connecting shaft 609 is rotatably installed in the mounting groove 610, a torsion spring 611 is sleeved on the connecting shaft 609, one end of the torsion spring 611 is installed on the inner wall of the mounting groove 610, and the other end of the torsion spring 611 is installed on the connecting shaft 609;

[0067] In addition, a wedge-shaped groove 607 is provided on one side of the pull-out door panel 601 , and two top wheels 608 are rotatably mounted on the equipment mounting frame 3 , and the top wheels 608 are in contact with the inner wall of the wedge-shaped groove 607 . It should be noted that, in the embodiment of the present invention, when the inner cabinet 2 is lifted out of the outer cabinet 1, the pull-out door panel 601 is no longer squeezed, and at this time, under the rebound force of the torsion spring 611, the connecting shaft 609 is driven to rotate, so that the pull-out door panel 601 rotates and opens, so that when the inner cabinet 2 is lifted out of the outer cabinet 1, the equipment mounting frame 3 slides out, and the pull-out door panel 601 automatically opens, so as to realize convenient installation or maintenance of the equipment mounting frame 3; in addition, when the inner cabinet 2 is retracted into the outer cabinet 1, the inner wall of the outer cabinet 1 squeezes the pull-out door panel 601, so that the pull-out door panel 601 rotates and closes, and squeezes the top wheel 608 on the equipment mounting frame 3 through the inner wall of the wedge-shaped groove 607 of the pull-out door panel 601, so that the equipment mounting frame 3 is squeezed and stored in the inner cabinet 2, and the equipment mounting frame 3 can be automatically recovered.

[0068] For further information, please refer to the attached manual. Figure 5 and Figure 10-12In a power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention, the fire extinguishing assembly 7 further includes a wedge frame 707, which is movably installed in the fire extinguishing box 702, and the wedge frame 707 is used to push sand out of the fire extinguishing box 702; a push-out spring 708 is installed on one side of the wedge frame 707, and the other end of the push-out spring 708 is installed on the inner wall of the fire extinguishing box 702. It should be noted that in the embodiment of the present invention, when a fire occurs, the fusible link 706 is quickly fused, and at the same time, the clamping frame 705 is melted, so that the pop-up cover 703 is unlocked, and then under the tensile force of the push-out spring 708, the wedge frame 707 is pushed out, and the sand is pushed out of the fire extinguishing box 702, so as to extinguish the fire of the cable 4 part and insulate it.

[0069] To be more specific, in the embodiment of the present invention, a pop-up cover 703 is rotatably installed on one side of the fire extinguisher box 702, and mounting seats 704 are rotatably installed on both sides of the pop-up cover 703, and both mounting seats 704 are installed on the inner wall of the outer cabinet 1; a clamping frame 705 is rotatably installed on the inner wall of the outer cabinet 1, and the clamping frame 705 is used to clamp the pop-up cover 703, and a fusible wire 706 is connected to the clamping frame 705, and the fusible wire 706 is connected to the threaded rod 511 and the cable 4. It should be noted that, in the embodiment of the present invention, when a short circuit occurs, the fusible link 706 is quickly fused, and at the same time, the clamping frame 705 is melted, so that the wedge frame 707 pushes the pop-up cover 703 open, and the pop-up cover 703 rotates on the two mounting seats 704, and the wedge frame 707 pushes the sand out of the fire extinguishing box 702, thereby extinguishing the fire on the cable 4 and insulating it; in addition, the fusible link 706 melts the threaded rod 511, so that the lifting spring 505 drives the driving rack 503 to move downward, so that the inner cabinet 2 is promptly popped out of the outer cabinet 1, and the connection between the cable 4 and the transfer conductive rod 506 is disconnected, so as to avoid further expansion of the fire caused by continuous short circuit, and at the same time, the fire is extinguished by the inner cabinet 2 in the smoke fire extinguisher 701, so as to achieve sufficient fire extinguishing of the outer cabinet 1 and the inner cabinet 2.

[0070] Please continue to refer to the instruction manual Figure 5 and Figure 10-12, more specifically, in the embodiment of the present invention, a push-pull rod 710 is movably connected between the pop-up cover 703 and the wedge frame 707, and the wedge frame 707 moves through the push-pull rod 710 to push the pop-up cover 703 to rotate and open; in addition, a push-pull frame 709 is installed on both the pop-up cover 703 and the wedge frame 707, and two push-pull shafts 711 are rotatably installed on the push-pull rod 710, and the two push-pull shafts 711 extend into the two push-pull frames 709 respectively. It should be noted that in the embodiment of the present invention, when the ejection spring 708 drives the wedge frame 707 to move, the wedge frame 707 moves through one push-pull frame 709 to drive the push-pull rod 710 to move, and the push-pull rod 710 moves to drive the other push-pull frame 709 to move, so that the push-pull frame 709 drives the pop-up cover 703 to rotate and pop open, and at the same time, the push-pull rod 710 slides in the two push-pull frames 709 through the two push-pull shafts 711, thereby popping the pop-up cover 703 open.

[0071] In summary, the working principle of a power distribution cabinet for distributed photovoltaic power generation provided by an embodiment of the present invention is:

[0072] When it is necessary to install electrical equipment on the equipment mounting frame 3 or to perform maintenance, the driving frame 512 is pulled so that the two insertion rods 516 are disengaged from the two slots 515. At this time, the driving frame 512 is unlocked, and the driving frame 512 moves through the pull rod 513 to slide vertically in the pull groove 514, and then the driving frame 512 is rotated so that the pull rod 513 drives the threaded rod 511 to rotate, and the threaded rod 511 rotates in the thread groove 510, and drives the driving rack 503 to move, and the driving rack 503 drives the driving rack 503 to move. 03 The lifting bar 509 slides vertically on the limiting bar 508, so that the driving rack 503 drives the driving gear 504 to rotate, and the driving gear 504 rotates to drive the rotating frame 502 to rotate. The rotating frame 502 rotates on a driving spindle 517. At the same time, the rotating frame 502 drives the lifting frame 501 to move through another driving spindle 517, so that the lifting frame 501 drives the inner cabinet 2 to lift, and then lifts the inner cabinet 2 out of the outer cabinet 1, which is convenient for operation;

[0073] Furthermore, when the inner cabinet 2 is stored in the outer cabinet 1, the top cover 603 is in close contact with the outer cabinet 1 to ensure the sealing between the outer cabinet 1 and the inner cabinet 2. At the same time, the inner cabinet 2 is ventilated through the non-powered hood 604. When the inner cabinet 2 is lifted out of the outer cabinet 1, the door panel 601 is no longer squeezed by the inner wall of the outer cabinet 1. At this time, under the rebound force of the auxiliary spring 606, the equipment mounting frame 3 is pushed to move, and the equipment mounting frame 3 slides in the two sliding grooves 605. At the same time, under the rebound force of the torsion spring 611, the connecting shaft 609 is driven to rotate, so that the pull-out The door panel 601 rotates and opens, so that when the inner cabinet 2 is lifted out of the outer cabinet 1, the equipment mounting rack 3 slides out, and the door panel 601 is automatically opened, so that the equipment mounting rack 3 can be easily installed or repaired. In addition, when the inner cabinet 2 is retracted into the outer cabinet 1, the inner wall of the outer cabinet 1 squeezes the door panel 601, so that the door panel 601 rotates and closes, and the top wheel 608 on the equipment mounting rack 3 is squeezed by the inner wall of the wedge-shaped groove 607 of the door panel 601, so that the equipment mounting rack 3 is squeezed and stored in the inner cabinet 2, and the equipment mounting rack 3 can be automatically recovered.

[0074] Furthermore, when a short circuit occurs, the fuse link 706 is quickly fused, and the card-joint frame 705 is melted at the same time. At this time, the wedge frame 707 is driven to move under the tensile force of the ejection spring 708. The movement of the wedge frame 707 drives the push-pull rod 710 to move through a push-pull frame 709. The movement of the push-pull rod 710 drives another push-pull frame 709 to move, so that the push-pull frame 709 drives the pop-up cover 703 to rotate and pop open. At the same time, the push-pull rod 710 slides in the two push-pull frames 709 through two push-pull shafts 711, and the wedge frame 707 moves the sand The child pushes out the fire extinguishing box 702, thereby extinguishing the fire in the cable 4 and insulating it to prevent the fire from further expanding. In addition, the fusible wire 706 melts the threaded rod 511, so that the lifting spring 505 drives the driving rack 503 to move downward, so that the inner cabinet 2 is ejected from the outer cabinet 1 in time, and the connection between the cable 4 and the transfer conductive rod 506 is disconnected to prevent the fire from further expanding due to a continuous short circuit. The fire is extinguished in the inner cabinet 2 in the smoke fire extinguisher 701, so that the outer cabinet 1 and the inner cabinet 2 are fully extinguished.

[0075] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A power distribution cabinet for distributed photovoltaic power generation, characterized in that: It comprises an outer cabinet, an inner cabinet and a cable, wherein the inner cabinet is movably installed in the outer cabinet, the outer cabinet is installed underground, an equipment mounting frame for installing electrical equipment is movably installed in the inner cabinet, and the cable passes through the outer cabinet and is connected to the inner cabinet; It also includes a switch assembly, which is connected to the outer cabinet and the inner cabinet, and is used to lift the inner cabinet to the outside of the outer cabinet; the switch assembly includes a lifting frame, which is installed on the bottom side of the inner cabinet, a rotating frame is rotatably installed on the inner wall of the outer cabinet, and the rotating frame is movably installed on the lifting frame, a driving gear is installed on the rotating frame, and a driving rack is meshed on the driving gear, and a threaded rod is rotatably installed on the outer cabinet, and the threaded rod is movably installed on the driving rack; It also includes a pull-out assembly, which is installed in the inner cabinet and is used to pull the equipment mounting frame out of the inner cabinet; the pull-out assembly includes a pull-out door panel, two connecting seats are installed on one side of the inner cabinet, the pull-out door panel is rotatably installed on the two connecting seats, and the two sides of the pull-out door panel are respectively in contact with the inner wall of the outer cabinet and the equipment mounting frame; It also includes a fire extinguishing assembly, which is installed in the outer cabinet and is used to extinguish a fire in the outer cabinet; the fire extinguishing assembly includes a smoke fire extinguisher and a fire extinguishing box, the smoke fire extinguisher is installed on the top side of the inner cabinet, the fire extinguishing box is installed on one side of the outer cabinet, and the fire extinguishing box is filled with sand, which is used to cover the cable and extinguish and insulate the cable; The pull-out assembly further comprises a top cover, which is mounted on the top side of the inner cabinet, and two non-powered hoods are mounted on the top cover; Both sides of the inner cabinet are provided with sliding grooves, the equipment mounting frame is slidably mounted in the two sliding grooves, an auxiliary spring is mounted on the inner wall of the sliding groove, and the other end of the auxiliary spring is mounted on the equipment mounting frame; The connecting seat is provided with a mounting groove, the pull-out door panel is provided with a connecting shaft, the connecting shaft is rotatably mounted in the mounting groove, a torsion spring is sleeved on the connecting shaft, one end of the torsion spring is mounted on the inner wall of the mounting groove, and the other end of the torsion spring is mounted on the connecting shaft; A wedge-shaped groove is provided on one side of the pull-out door panel, and two top wheels are rotatably mounted on the equipment mounting frame, and the top wheels are in contact with the inner wall of the wedge-shaped groove; The fire extinguishing assembly further comprises a wedge-shaped frame, the wedge-shaped frame is movably mounted in the fire extinguishing box, and the movement of the wedge-shaped frame is used to push sand out of the fire extinguishing box; A push-out spring is installed on one side of the wedge-shaped frame, and the other end of the push-out spring is installed on the inner wall of the fire extinguishing box; A pop-up cover is rotatably mounted on one side of the fire extinguisher box, mounting seats are rotatably mounted on both sides of the pop-up cover, and both mounting seats are mounted on the inner wall of the outer cabinet; A clamping frame is rotatably mounted on the inner wall of the outer cabinet, the clamping frame is used to clamp the pop-up cover, a fusible wire is connected to the clamping frame, and the fusible wire is connected to the threaded rod and the cable; A push-pull rod is movably connected between the pop-up cover and the wedge-shaped frame, and the wedge-shaped frame moves through the push-pull rod to push the pop-up cover to rotate and open; The pop-up cover and the wedge-shaped frame are both equipped with push-pull frames, and two push-pull shafts are rotatably mounted on the push-pull rod, and the two push-pull shafts extend into the two push-pull frames respectively.

2. A power distribution cabinet for distributed photovoltaic power generation according to claim 1, characterized in that: The switch assembly further comprises a plurality of transfer conductive rods, and the plurality of transfer conductive rods are all installed in the inner cabinet; A plurality of plug-in bases are installed on the inner wall of the bottom side of the outer cabinet, the cables are connected to the plurality of plug-in bases, and the plurality of transfer conductive rods are respectively plugged into the plurality of plug-in bases.

3. A power distribution cabinet for distributed photovoltaic power generation according to claim 2, characterized in that: Two driving spindles are rotatably mounted on the rotating frame, and one of the driving spindles extends into the rotating frame; Another driving spindle is rotatably mounted on the inner wall of the outer cabinet, and the rotating frame and the driving gear are both sleeved on the driving spindle; A sliding seat is installed on an inner wall of one side of the outer cabinet, a sliding bar is slidably installed in the sliding seat, and the sliding bar is installed on the inner cabinet.

4. A power distribution cabinet for distributed photovoltaic power generation according to claim 3, characterized in that: A thread groove is formed on the top side of the driving rack, the threaded rod is threadedly installed in the thread groove, a lifting spring is installed on the bottom side of the driving rack, and the bottom end of the lifting spring is installed on the bottom inner wall of the outer cabinet; A limiting strip is installed on an inner wall of one side of the outer cabinet, a lifting strip is slidably installed in the limiting strip, and the lifting strip is installed on the driving rack.

5. A power distribution cabinet for distributed photovoltaic power generation according to claim 4, characterized in that: A pull-out groove is provided at the top of the threaded rod, the pull-out groove is rectangular, a pull-out rod is movably installed in the pull-out groove, and a driving frame is installed at the top of the pull-out rod; Two plugging rods are installed on the bottom side of the driving frame, and two slots are provided on the outer cabinet, and the two plugging rods are respectively plugged into the two slots.

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