A fireproofing hopper for an inverter

Abstract

This utility model discloses a fireproof funnel for inverters, comprising a funnel box body, a vertical cable tray, and a horizontal cable tray. The inverter's terminals are inserted into the funnel box body, and the cables are routed through the vertical and horizontal cable trays, thus preventing damage to the terminals and cables caused by human error or external environmental factors, effectively preventing the escalation of potential hazards and serious accidents. When the inverter malfunctions and generates sparks, the funnel box body shields the sparks, preventing them from contacting external vegetation and thus eliminating the risk of fire. The funnel box body has a pre-installed heat dissipation grid to prevent high temperatures inside. The pores of the heat dissipation grid are less than 2mm in diameter, and the grid is a certain distance from the bottom surface, so sparks fall into the sealed area below and are essentially not leaked out. The funnel box body is movably connected to the vertical cable tray via a docking slot, allowing for convenient disassembly during fault diagnosis and maintenance, reducing maintenance time.

Description

Technical Field

[0001] This utility model relates to the field of inverter fire protection technology, and in particular to an inverter fire protection funnel. Background Technology

[0002] As photovoltaic distributed energy systems are deployed on a large scale in complex terrains such as mountains and hills, inverters, as the core equipment for DC-AC power conversion, face multiple environmental challenges to safe operation. To balance ecological protection and new energy infrastructure development, mountain photovoltaic projects often adopt a "vegetation preservation + ecological restoration" construction model, creating a unique operating environment with high-density vegetation cover. In such scenarios, high-temperature arcs caused by short-circuit faults in the inverter's DC terminals, ground discharges caused by cable insulation damage, coupled with factors such as the reduced ignition point of dry grass layers during the dry season and insufficient vertical distance between the equipment platform and combustibles, constitute a spatial coupling hazard between spark ejection trajectories and the distribution of combustibles on the ground. Traditional fire prevention solutions, limited by the flame-retardant design of the equipment itself, suffer from technical defects such as insufficient extinguishing agent spray radius (typical ejection radius > 1.5m) and the inability of thermal barriers to block arc conduction along the equipment support.

[0003] Existing photovoltaic inverter protection technologies have the following significant drawbacks: 1. Traditional fireproof structures use a fully enclosed design, which can prevent sparks from splashing out, but causes the internal temperature of the equipment to rise sharply during operation (measured temperature rise reaches 25-30℃), accelerating the aging of components and creating a secondary fire hazard; 2. There is a 5-8mm gap at the cable connection point, and sparks can still spread to the ground through the carbonization path on the cable surface; 3. The fixed bracket is welded to the equipment body, which requires the entire unit to be disassembled during fault repair, increasing the maintenance time by more than 2 hours per maintenance.

[0004] Therefore, it is necessary to develop a fireproof inverter funnel to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to design a fireproof funnel for inverters in order to solve the above problems.

[0006] This utility model achieves the above objectives through the following technical solutions: An inverter fireproof funnel, comprising: Funnel box body; The funnel box body is installed below the inverter, and the inverter's wiring terminals are placed inside the funnel box body. Heat dissipation grids are provided on the side walls of the funnel box body. Vertical cable tray; the lower end of the funnel box is connected to a docking slot box, and the upper end of the vertical cable tray is fitted onto the outside of the docking slot box; Horizontal cable tray; the first end of the horizontal cable tray is connected to the lower end of the vertical cable tray. The cables pass through the horizontal cable tray in sequence, and then enter the funnel box through the junction box to connect with the wiring terminals of the inverter. The cables are sealed horizontally through the sealing structure inside the junction box.

[0007] The beneficial effects of this utility model are as follows: 1. The inverter's terminals are installed through the funnel-shaped box, and the cables are transferred through the vertical and horizontal cable trays. This avoids damage to the terminals and cables caused by human error or external environment, and can effectively prevent the escalation of hidden dangers and serious accidents.

[0008] 2. When the inverter malfunctions and generates sparks, the funnel box will shield the sparks and prevent them from coming into contact with external vegetation, thereby eliminating the risk of fire.

[0009] 3. The funnel box body is equipped with a heat dissipation grid to prevent high temperatures from being generated inside the funnel box body. The pore diameter of the heat dissipation grid is less than 2mm, and the heat dissipation grid is a certain distance from the bottom surface. Sparks and fires fall into the sealed position below and will basically not leak out.

[0010] 4. The funnel box is movably connected to the vertical cable tray via a docking slot box, which can be disassembled separately during fault diagnosis and repair, making it more convenient and shortening maintenance time. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a structural schematic diagram of the vertical and horizontal cable trays in this utility model; Figure 3 This is a left view of the present invention; Figure 4 This is the right view of this utility model; Figure 5 This is the front view of this utility model; Figure 6 This is a left view of the installation structure of this utility model; Figure 7 This is a right view of the installation structure of this utility model; Figure 8 This is the main view of the installation structure of this utility model.

[0012] The following are the labeling elements in the diagram: 1. Inverter; 2. Funnel-shaped box; 3. Vertical cable tray; 4. Horizontal cable tray; 5. Support leg; 6. DC side; 7. AC side; 8. Partition; 9. Main box; 10. Cover plate; 11. Hinge; 12. Heat dissipation grid; 13. Connecting slot box; 14. First connecting plate; 15. Through hole; 16. Second connecting plate; 17. Lower bracket of inverter; 18. Mounting slot; 19. Third connecting plate; 20. Female buckle; 21. Male buckle. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0014] 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 claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0015] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0020] like Figure 1-8 As shown, an inverter fireproof funnel includes: Funnel box 2; Funnel box 2 is installed below inverter 1, the wiring terminals of inverter 1 are placed inside funnel box 2, and heat dissipation grid 12 is provided on the side wall of funnel box 2. Vertical cable tray 3; The lower end of the funnel box 2 is connected to the docking slot box 13, and the upper end of the vertical cable tray 3 is fitted onto the outside of the docking slot box 13; Horizontal cable tray 4; the first end of the horizontal cable tray 4 is connected to the lower end of the vertical cable tray 3. The cable passes through the horizontal cable tray 4 in sequence and then enters the funnel box 2 through the junction box and connects to the wiring terminal of the inverter 1. It is sealed horizontally through the sealing structure in the junction box 13.

[0021] This application utilizes a fully enclosed stainless steel fireproof funnel design to seal the electrical terminals within the funnel box 2, forming a physical isolation layer. Combined with the bottom sealed cable tray structure, it achieves dual protection: on the one hand, the heat dissipation mesh 12 with an aperture of <2mm not only meets the normal heat dissipation requirements of the equipment (the mesh spacing has been verified by thermodynamic simulation to ensure a temperature rise ≤5℃), but also effectively intercepts sparks with a diameter >2mm; on the other hand, the extended docking slot box 13 design allows the vertical cable tray 3 to seamlessly connect with the funnel box 2, so that even if the inverter 1 malfunctions and generates an electric arc spark, it can be confined within a sealed channel. Tests have shown that this reduces the probability of external ignition by 99%, solving the major safety hazard of spark leakage igniting dry grass in mountain photovoltaic scenarios.

[0022] like Figure 3-4As shown in Figures 6-7, in some embodiments, the funnel box body 2 includes a main box body 9 and a cover plate 10. The upper end and the first side wall of the main box body 9 are open. The cover plate 10 covers the opening of the first side wall of the main box body 9. The first end of the cover plate 10 is rotatably connected to the second side wall of the main box body 9 through multiple hinges 11. Multiple male buckles 21 are installed on the second end of the cover plate 10, and correspondingly, multiple female buckles 20 are installed on the third side wall of the main box body 9. The male buckles 21 and female buckles 20 are engaged. The second and third side walls of the main box body 9 are two opposite side walls. The funnel box body 2 consists of a main box body 9 and a cover plate 10. The cover plate 10 can be opened, which is beneficial for on-site installation, cable laying, fireproof sealing of holes, and other construction work.

[0023] like Figure 3-4 As shown, in some embodiments, heat dissipation meshes 12 are provided on the second and third side walls of the main housing 9, and the aperture of the heat dissipation meshes 12 is <2mm.

[0024] like Figure 3-5 As shown, in some embodiments, a first connecting plate 14 is installed on the inner side of the second side wall of the main housing 9, a third connecting plate 19 is installed on the inner side of the third side wall of the main housing 9, and a second connecting plate 16 is connected to the upper side of the third side wall of the main housing 9. Through holes are provided on the second side wall, third side wall, first connecting plate 14, and third connecting plate 19 of the main housing 9. Bolts pass through the through holes 15 and connect to the existing bolt holes on the inverter 1. The second connecting plate 16 can be installed upwards to cover more side walls of the inverter 1, and female fasteners 20 can also be provided on it.

[0025] like Figure 5-8 As shown, in some embodiments, the upper end of the cover plate 10 installed on the inner side of the third side wall of the main housing 9 has multiple mounting slots 18. After the cover plate 10 is closed, multiple inverter lower brackets 17 are respectively placed in the multiple mounting slots 18. This structural design allows the inverter 1 to be more tightly integrated with the funnel housing 2.

[0026] like Figure 1 As shown, in some embodiments, the lower end of the transverse cable tray 4 is connected to multiple legs 5, which are supported on the ground.

[0027] like Figure 2 As shown, in some embodiments, both the vertical cable tray 3 and the horizontal cable tray 4 are laterally divided into a DC side 6 and an AC side 7 by a partition 8, with DC cables placed on the DC side 6 and AC cables placed on the AC side 7.

[0028] In some embodiments, the second end of the transverse cable tray 4 is sealed by a sealing structure after the cable passes through.

[0029] In some embodiments, the sealing structure is fireproof putty.

[0030] In some embodiments, the inner sides of the main housing 9, the cover plate 10, and the docking slot box 13 are all coated with insulating varnish. This prevents the wiring terminals from falling and coming into direct contact with the fireproof cover, which could cause arcing and lead to secondary spread of the fault.

[0031] In some embodiments, compared to the corrosion susceptibility of ordinary carbon steel protective covers, this solution uses 304 stainless steel, which, as verified by salt spray testing, offers more than three times the corrosion resistance lifespan and can maintain structural integrity for 20 years in complex environments with high altitudes and high humidity. The unique movable panel design (equipped with M8 stainless steel bolt connections) facilitates on-site installation and commissioning.

[0032] This application optimizes the dimensions of the funnel through 3D modeling, significantly reducing the footprint while ensuring coverage of the inverter 1 unit and cable interfaces, thus minimizing damage to native vegetation. Dynamic monitoring data shows that the vegetation recovery rate in the site area increased by 40% after installation, meeting the ecological requirements of "maximum protection during construction and minimum disturbance during operation."

[0033] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A fireproof funnel for an inverter, characterized in that, include: Funnel box body; The funnel box is installed below the inverter, the inverter's wiring terminals are placed inside the funnel box, and heat dissipation grids are provided on the side walls of the funnel box. Vertical cable tray; the lower end of the funnel box is connected to a docking slot box, and the upper end of the vertical cable tray is fitted onto the outside of the docking slot box; Horizontal cable tray; the first end of the horizontal cable tray is connected to the lower end of the vertical cable tray. The cables pass through the horizontal cable tray in sequence, and then enter the funnel box through the junction box to connect with the wiring terminals of the inverter. The cables are sealed horizontally through the sealing structure inside the junction box.

2. The inverter fireproof funnel according to claim 1, characterized in that, The funnel box body includes a main box body and a cover plate. The upper end and the first side wall of the main box body are open. The cover plate covers the opening of the first side wall of the main box body. The first end of the cover plate is rotatably connected to the second side wall of the main box body through multiple hinges. Multiple male buckles are installed on the second end of the cover plate, and correspondingly multiple female buckles are installed on the third side wall of the main box body. The male buckles and female buckles are engaged with each other. The second side wall and the third side wall of the main box body are two opposite side walls.

3. The inverter fireproof funnel according to claim 2, characterized in that, Heat dissipation grids are provided on the second and third side walls of the main body, and the pore size of the heat dissipation grids is <2mm.

4. The inverter fireproof funnel according to claim 2, characterized in that, A first connecting plate is installed on the inner side of the second side wall of the main box, a third connecting plate is installed on the inner side of the third side wall of the main box, and a second connecting plate is connected to the upper side of the third side wall of the main box. Through holes are provided on the second side wall, the third side wall, the first connecting plate, and the third connecting plate of the main box. After the bolt passes through the through hole, it is connected to the original bolt hole on the inverter.

5. The inverter fireproof funnel according to claim 2, characterized in that, The upper end of the cover plate installed on the inner side of the third side wall of the main box has multiple mounting slots. After the cover plate is closed, the lower brackets of multiple inverters are placed in the multiple mounting slots respectively.

6. The inverter fireproof funnel according to claim 1, characterized in that, The lower end of the horizontal cable tray is connected to multiple legs, which support it on the ground.

7. The inverter fireproof funnel according to claim 1, characterized in that, Both vertical and horizontal cable trays are horizontally divided into DC and AC sides by partitions. DC cables are placed on the DC side and AC cables are placed on the AC side.

8. The inverter fireproof funnel according to claim 1, characterized in that, The second end of the transverse cable tray is sealed by a sealing structure after the cable passes through it.

9. The inverter fireproof funnel according to claim 8, characterized in that, The sealing structure is fireproof putty.

10. The inverter fireproof funnel according to claim 2, characterized in that, The inner sides of the main box, cover plate, and docking slot box are all coated with insulating varnish.

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