Photovoltaic large off switch

Abstract

The utility model provides a kind of photovoltaic big off switch belongs to photovoltaic switch technical field, it includes the cavity formed by bottom shell and upper cover, at least two off components are equipped in cavity, off component includes mounting bracket, breaking switch and motor, the fixed plate of mounting bracket is supported high by support leg, its both ends are equipped with front, rear fixed seat, breaking switch is equipped therebetween, including multiple stacked breaking unit and a common operating shaft, operating shaft is connected with motor, fixed plate is located on each breaking unit both sides and is equipped with wiring slot, bottom shell side wall is equipped with binding post corresponding each breaking unit. In the utility model, the centralized, synchronous quick breaking of multiple photovoltaic components is realized, the unified control and management of photovoltaic system are facilitated, and the neat wiring and effective management of multiple incoming and outgoing cables are simultaneously realized.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic switch technology, and in particular to a photovoltaic large-scale shutdown switch. Background Technology

[0002] In photovoltaic power generation systems, fast-shutdown switches are critical equipment for ensuring the safe operation of the system. When a photovoltaic system malfunctions, catches fire, or requires maintenance, the fast-shutdown switch needs to be able to disconnect the electrical connection between the photovoltaic modules and the inverter in a very short time to eliminate the safety hazards caused by DC high voltage.

[0003] Currently, in the photovoltaic field, the number of photovoltaic module-level devices that a single fast-shutdown switch can disconnect simultaneously is limited. When the photovoltaic array is large in scale, multiple shutdown switches often need to be deployed in parallel, which is not convenient for unified control and management. At the same time, the incoming and outgoing cables of multiple photovoltaic modules lack effective management. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a photovoltaic large-scale shutdown switch.

[0005] The technical solution adopted by this utility model is as follows: This application provides a photovoltaic large shut-off switch, including a bottom shell and a top cover. At least two shut-off components are arranged in the cavity formed by the two. The shut-off components include a mounting frame, a disconnect switch and a motor. The mounting frame includes a fixing plate, several legs, a front fixing seat and a rear fixing seat. The fixing plate is mounted in the cavity by the legs. The front fixing seat and the rear fixing seat are respectively provided with the two ends of the fixing plate. The disconnect switch is arranged between the front fixing seat and the rear fixing seat. It includes several stacked disconnect units and an operating shaft shared by all disconnect units. The motor is arranged on the front fixing seat. One end of the operating shaft passes through the front fixing seat and is connected to the motor for transmission. The fixing plate is provided with wiring grooves on both sides of each disconnect unit. The side wall of the bottom shell is provided with terminals corresponding to each disconnect unit.

[0006] In some embodiments, a drive shaft is provided at one end of the operating shaft passing through the front fixed seat and is connected to a motor through the drive shaft. A synchronously rotating indicator is provided on the drive shaft. The indicator includes an arc-shaped plate portion, which is coaxially arranged with the drive shaft and has a first color indicator area and a second color indicator area arranged circumferentially. An opening is provided above the arc-shaped plate portion of the upper cover, and a transparent cover is provided inside the opening.

[0007] In some embodiments, the transparent cover is provided with a connecting flange, the transparent cover extends out of the opening, the connecting flange is connected to the inner sidewall of the opening by bolts, and a sealing ring is provided between the two.

[0008] In some embodiments, the front fixed seat is provided with an arc-shaped groove coaxially with the drive shaft, the drive shaft is provided with a synchronously rotating disk, the rotating disk is provided with a linkage column, and the linkage column slides in conjunction with the arc-shaped groove.

[0009] In some embodiments, a trigger switch is provided at both ends of the arc-shaped groove on the front fixed seat, and the trigger end of the trigger switch is located on the rotation trajectory of the linkage column.

[0010] In some embodiments, the front side of the fixing plate is provided with a through hole below the front fixing seat, and the middle part is a boss below the disconnect switch. Both the front fixing seat and the rear fixing seat are provided with a pressure cover at the end facing the disconnect switch, and both are connected to the fixing plate by bolts.

[0011] In some embodiments, the bottom of the support leg is provided with an insertion hole, and its side wall is provided with a groove. The groove is provided with a connecting hole communicating with the insertion hole. The bottom wall of the cavity is provided with a column adapted to the insertion hole. The column is provided with a threaded hole coaxially with the connecting hole, and a bolt is passed through the connecting hole and connected to the threaded hole.

[0012] In some embodiments, the cable tray is an L-shaped through-slot, which includes an inlet portion and a cable placement portion. The width of the inlet portion is smaller than the width of the cable placement portion, and all corners within the inlet portion and the cable placement portion are rounded.

[0013] In some embodiments, at least two connecting components are symmetrically arranged at the bottom of the bottom shell. The connecting components include a sliding groove, a pad, and a connecting plate disposed on the outer bottom wall of the bottom shell. The pad is connected to both sides of the sliding groove to form a sliding track that slides and cooperates with the connecting plate. A limiting plate is provided on the side of the connecting plate near the center of the bottom shell, and a connecting part is provided on the side away from the center of the bottom shell.

[0014] In some embodiments, the connecting part is a U-shaped plate, and the middle part of the pad is provided with concave portions at opposite ends, which can be engaged with the U-shaped plate, and the lower end surface of the U-shaped plate does not exceed the lower end surfaces of the pad at both ends. The first flat plate portion and the second flat plate portion of the U-shaped plate are provided with strip-shaped connecting holes.

[0015] The beneficial effects of this utility model are as follows: In this utility model, multiple shutdown components are set in one housing, and each shutdown component can synchronously drive multiple stacked shutdown units, thereby realizing centralized, synchronous and rapid shutdown of multiple photovoltaic modules, which facilitates the unified control and management of the photovoltaic system; at the same time, through the elevated mounting frame and independent cable trays, a clear and isolated cable path is provided for each shutdown unit, realizing the orderly wiring and effective management of multiple incoming and outgoing cables. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0017] Figure 1 This is a schematic diagram of a photovoltaic large-scale shut-off switch according to this utility model. Figure 1 ; Figure 2 This is a schematic diagram of a photovoltaic large-scale shut-off switch according to this utility model. Figure 2 ; Figure 3 This is a cross-sectional view of a photovoltaic large-scale shut-off switch according to the present invention. Figure 1 ; Figure 4 This is a cross-sectional view of a photovoltaic large-scale shut-off switch according to the present invention. Figure 2 ; Figure 5 This is a partial cross-sectional view of a photovoltaic large-scale shut-off switch according to the present invention; Figure 6 This is a partial schematic diagram of a photovoltaic large-scale shut-off switch according to the present invention; Figure 7 This is a schematic diagram of a photovoltaic large-scale shut-off switch according to this utility model. Figure 3 ; Figure 8 This is a schematic diagram of the connecting component in this utility model. Figure 1 ; Figure 9 This is a schematic diagram of the connecting component in this utility model. Figure 2 ; In the diagram, 100 is the bottom shell, 110 is the top cover, 120 is the cavity, 130 is the column, 200 is the shut-off assembly, 210 is the mounting bracket, 211 is the fixing plate, 2111 is the through hole, 2112 is the boss, 212 is the support leg, 2121 is the insertion hole, 2122 is the groove, 2123 is the connecting hole, 213 is the front fixing seat, 2131 is the arc groove, 214 is the rear fixing seat, 215 is the pressure cover, 216 is the wiring groove, 2161 is the entrance, 2162 is the wiring section, 220 is the disconnect switch, 221 is the disconnect unit, and 222 is the operating shaft. 230-Motor, 240-Drive shaft, 250-Indicator, 251-Arc-shaped plate, 252-First color indicator area, 253-Second color indicator area, 260-Transparent cover, 261-Connecting flange, 262-Sealing ring, 270-Rotating disk, 271-Linkage column, 280-Trigger switch, 300-Connecting assembly, 310-Slide groove, 320-Padded block, 321-Recessed part, 330-Connecting plate, 331-Limiting plate, 332-Connecting part, 3321-First flat plate, 3322-Second flat plate, 3323-Strip connecting hole. Detailed Implementation

[0018] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but rather to the widest scope consistent with the claims.

[0019] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "lateral", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element or component to have a specific orientation, or to be constructed and operated in a specific orientation.

[0020] It should be noted that the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are only used to distinguish different components and should not be construed as limiting the embodiments of this application.

[0021] It should be noted that the terms "installation," "setup," "equipped with," "connection," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral structures; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts.

[0022] It should be noted that the terms "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "in some embodiments," "exemplarily," and "for example" is intended to present the relevant concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of this application.

[0023] Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] Regarding the accompanying drawings of this application, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not necessarily drawn to scale.

[0025] Existing photovoltaic fast shutdown solutions often require multiple independent switches to be connected in parallel when dealing with large-scale arrays, which leads to inconvenient control and management difficulties. Furthermore, the lack of effective management of multiple cables inside the box causes messy wiring and safety hazards.

[0026] like Figures 1 to 9 As shown, this embodiment provides a photovoltaic large-scale shutdown switch, including a bottom shell 100 and a top cover 110, which are locked together by screws to form a sealed cavity 120. At least two shutdown components 200 with the same structure and independent operation are arranged side by side in the cavity 120. By integrating multiple shutdown components 200 into a single shell, this embodiment realizes centralized control of more photovoltaic modules with a single device, which greatly simplifies system deployment.

[0027] Each of the shutdown components 200 includes a mounting bracket 210, a disconnect switch 220, and a motor 230. The mounting bracket 210 includes a fixed plate 211, multiple legs 212 vertically connected to the bottom of the fixed plate 211, and a front mounting base 213 and a rear mounting base 214 respectively fixed to the front and rear ends of the fixed plate 211 by bolts. Through the legs 212, the entire mounting bracket 210 is elevated and installed at the bottom of the cavity 120, so that a space for heat dissipation and auxiliary wiring is formed below the fixed plate 211.

[0028] In this embodiment, the disconnect switch 220 is clamped and installed between the front fixed seat 213 and the rear fixed seat 214. It includes several stacked independent disconnect units 221 and a common operating shaft 222 that runs through all the disconnect units 221. The rotation of the operating shaft 222 can synchronously drive the contacts inside all the disconnect units 221 under the shut-off component 200 to perform the action of "opening" or "closing".

[0029] The motor 230 is mounted on the front fixed base 213, and its output shaft is connected to one end of the operating shaft 222 via a transmission connection, for example, through a gear set, to provide centralized power for the shutdown operation. This allows each shutdown component 200 to synchronously control multiple photovoltaic modules and respond to a unified command.

[0030] Furthermore, on the fixing plate 211, on both the left and right sides of the disconnect switch 220, corresponding to the position of each disconnect unit 221, a cable tray 216 is provided. Simultaneously, on the side wall of the bottom shell 100, corresponding to each disconnect unit 221, inner and outer terminals are provided, providing a clear and isolated path for each input / output cable: after the cable is introduced from the terminal on the side wall of the bottom shell 100, it can be directly guided and embedded into the cable tray 216 on the side of the corresponding disconnect unit 221, arranged upwards or downwards along the cable tray 216, and finally connected to the terminal of the disconnect unit 221. Through the elevated mounting bracket 210 and the independent cable trays 216, the orderly wiring and effective management of multiple cables are achieved, avoiding cross-tangling and improving electrical safety and maintenance convenience.

[0031] In some embodiments, one end of the operating shaft 222 that protrudes from the front fixed seat 213 is connected to a drive shaft 240. An indicator 250 is fixedly sleeved on the drive shaft 240. The indicator 250 includes an arc-shaped plate portion 251 coaxial with the drive shaft 240. The circumferential surface of the arc-shaped plate portion 251 is divided into a first color indicator area 252 and a second color indicator area 253, such as green representing closed and red representing open.

[0032] like Figure 6 As shown, an opening is made above the indicator 250 on the upper cover 110, and a transparent cover 260 is installed thereon. When the operating shaft 222 rotates and drives the disconnection unit to operate, the indicator 250 rotates synchronously. The user can observe the currently displayed color through the transparent cover 260, thereby intuitively judging the switch status.

[0033] Preferably, the edge of the transparent cover 260 is provided with an outwardly extending connecting flange 261. During installation, the transparent cover 260 is inserted into the opening of the upper cover 110 from the inside, so that the connecting flange 261 abuts against the inside of the opening. Then, bolts are used from the outside to connect and secure the upper cover 110 to the connecting flange 261. A sealing ring 262 is placed between the connecting flange 261 and the inner wall of the opening of the upper cover 110.

[0034] In some embodiments, such as Figure 5 As shown, an arc-shaped groove 2131 is coaxially formed on the front fixed seat 213 with the transmission shaft 240. A rotating disk 270 is also fixed on the transmission shaft 240. A linkage column 271 is provided on the rotating disk 270. The linkage column 271 is inserted into the arc-shaped groove 2131. When the motor 230 drives the transmission shaft 240 to rotate, the linkage column 271 slides with the rotating disk 270 in the arc-shaped groove 2131. Its sliding range is limited by the two ends of the arc-shaped groove 2131, thereby limiting the maximum rotation angle of the operating shaft 222 and preventing over-rotation.

[0035] Furthermore, a trigger switch 280, such as a micro switch, is installed at each end of the arc-shaped groove 2131 on the front fixed seat 213. When the linkage column 271 slides to the end position of "open" or "closed", it will press the trigger switch 280 at the corresponding end, generating an electrical signal to be fed back to the controller to confirm that the action has been performed.

[0036] In some embodiments, the front side of the fixing plate 211 is provided with a through hole 2111 below the front fixing seat 213 to facilitate the wiring of the motor and the trigger switch 280 and ventilation; the middle part is provided with a boss 2112 below the disconnect switch 220 to provide heat dissipation space for the bottom of the disconnect switch 220.

[0037] The front fixing seat 213 and the rear fixing seat 214 are each provided with a pressure cover 215 at one end facing the disconnect switch 220, which can partially cover the end of the disconnect unit 221. They are connected to the fixing plate 211 by bolts, and together they firmly press and fix the disconnect switch 220.

[0038] In some embodiments, the bottom of the support leg 212 is provided with an insertion hole 2121, and the side wall is provided with a groove 2122. The groove 2122 is provided with a connecting hole 2123 communicating with the insertion hole 2121. The bottom wall of the cavity 120 is provided with a column 130 adapted to the insertion hole 2121, and the column 130 is provided with a threaded hole.

[0039] During installation, insert the insertion hole 2121 of the support leg 212 into the column 130, and then insert the bolt from the groove 2122 on the side, so that it passes through the connecting hole 2123 and is screwed into the threaded hole of the column 130, thereby locking the support leg 212 onto the base shell 100.

[0040] In some embodiments, the cable tray 216 is an L-shaped through-slot, including a narrower inlet 2161 and a wider cable placement section 2162, where cables can be inserted from the inlet 2161 and then neatly placed in the spacious cable placement section 2162.

[0041] The inner corners of the inlet section 2161 and the cable placement section 2162 are all rounded, which effectively prevents the cable from being cut by sharp corners when bending, reflecting the attention to detail in cable protection.

[0042] In some embodiments, such as Figures 7 to 9 As shown, at least two sets of connecting components 300 are symmetrically arranged at the bottom of the bottom shell 100, for example, two are arranged in a straight line, or four are arranged in a cross shape, etc.

[0043] Each connecting assembly 300 includes a slide groove 310 fixed to the outer bottom wall of the bottom shell 100, pads 320 connected to both sides of the slide groove 310, and a connecting plate 330. The slide groove 310 and the pads 320 on both sides together form a slide channel. The connecting plate 330 can slide laterally in this slide channel to adjust its position. The connecting plate 330 has a limiting plate portion 331 on the side near the center of the bottom shell and a connecting portion 332 on the side away from the center. By sliding the connecting plate 330, the length of the connecting portion 332 extending out of the edge of the bottom shell can be adjusted to adapt to different mounting hole spacings.

[0044] Furthermore, the connecting part 332 is specifically a U-shaped plate, and the middle part of the pad 320 is provided with a concave part 321 relative to its two ends. When the connecting plate 330 slides to a specific position, the U-shaped plate can be inserted into the concave part 321 in the middle of the pad 320, and the lower end surface of the U-shaped plate does not exceed the lower end surfaces of both ends of the pad 320. At this time, the connecting plate 330 is retracted into the bottom shell 100 and is relatively positioned, and will not shake at will.

[0045] The U-shaped plate includes a first flat plate portion 3321 and a second flat plate portion 3322 arranged in parallel, both of which have elongated strip-shaped connecting holes 3323, so as to flexibly fix it to the mounting surface with bolts. The U-shaped plate is a thin metal plate with elastic anti-loosening function.

[0046] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that the requirements of this application encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0047] Furthermore, it should be understood that in the foregoing description of the embodiments of this application, various features are combined in a single embodiment, drawing, or description for the purpose of simplifying the understanding of a feature. However, this does not mean that the combination of these features is necessary, and those skilled in the art may readily identify some of the devices as separate embodiments when reading this application. That is, the embodiments in this application can also be understood as an integration of multiple sub-embodiments. It is also valid when each sub-embodiment contains fewer than all the features of a single foregoing disclosed embodiment.

[0048] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed herein are merely examples and not limitations. Those skilled in the art can adopt alternative configurations to implement the applications in this application based on the embodiments in this application. Therefore, the embodiments of this application are not limited to the embodiments precisely described in the application.

Claims

1. A photovoltaic large-scale shutdown switch, characterized in that, The device includes a bottom shell and a top cover. Within the cavity formed by these two components are at least two shut-off assemblies. Each shut-off assembly includes a mounting bracket, a disconnect switch, and a motor. The mounting bracket includes a fixing plate, several legs, a front fixing seat, and a rear fixing seat. The fixing plate is supported within the cavity by the legs. The front and rear fixing seats each have one end of the fixing plate. The disconnect switch is located between the front and rear fixing seats and includes several stacked disconnect units and a shared operating shaft for each disconnect unit. The motor is mounted on the front fixing seat, and one end of the operating shaft passes through the front fixing seat and is connected to the motor for transmission. Wiring grooves are provided on both sides of each disconnect unit on the fixing plate. A terminal post is provided on the side wall of the bottom shell corresponding to each disconnect unit.

2. The photovoltaic large-scale shutdown switch according to claim 1, characterized in that, The operating shaft has a drive shaft at one end that passes through the front fixed seat and is connected to the motor through the drive shaft. The drive shaft has a synchronously rotating indicator. The indicator includes an arc-shaped plate portion that is coaxially arranged with the drive shaft and has a first color indicator area and a second color indicator area arranged circumferentially. The upper cover has an opening above the arc-shaped plate portion and a transparent cover is provided inside the opening.

3. A photovoltaic large-scale shutdown switch according to claim 2, characterized in that, The transparent cover is provided with a connecting flange, the transparent cover extends out of the opening, the connecting flange is connected to the inner sidewall of the opening by bolts, and a sealing ring is provided between the two.

4. A photovoltaic large-scale shutdown switch according to claim 2, characterized in that, The front fixed seat is provided with an arc-shaped groove coaxially with the drive shaft. The drive shaft is provided with a synchronously rotating disk. The rotating disk is provided with a linkage column, and the linkage column slides in conjunction with the arc-shaped groove.

5. A photovoltaic large-scale shutdown switch according to claim 4, characterized in that, Trigger switches are provided at both ends of the arc-shaped groove on the front fixed seat, and the trigger ends of the trigger switches are located on the rotation trajectory of the linkage column.

6. A photovoltaic large-scale shutdown switch according to claim 1, characterized in that, The front side of the fixing plate is provided with a through hole below the front fixing seat, and the middle part is a boss located below the disconnect switch. Both the front fixing seat and the rear fixing seat are provided with a pressure cover at the end facing the disconnect switch, and the two are connected to the fixing plate by bolts.

7. A photovoltaic large-scale shutdown switch according to claim 1, characterized in that, The bottom of the support leg is provided with an insertion hole, and its side wall is provided with a groove. The groove is provided with a connecting hole that communicates with the insertion hole. The bottom wall of the cavity is provided with a column that is adapted to the insertion hole. The column is provided with a threaded hole coaxial with the connecting hole. A bolt passes through the connecting hole and connects with the threaded hole.

8. A photovoltaic large-scale shutdown switch according to claim 1, characterized in that, The cable tray is an L-shaped through-slot, which includes an inlet and a cable placement section. The width of the inlet is smaller than the width of the cable placement section, and all corners of the inlet and the cable placement section are rounded.

9. A photovoltaic large-scale shutdown switch according to claim 1, characterized in that, At least two connecting components are symmetrically arranged at the bottom of the bottom shell. The connecting components include a sliding groove, a pad, and a connecting plate disposed on the outer bottom wall of the bottom shell. The pad is connected to both sides of the sliding groove to form a sliding track that slides and cooperates with the connecting plate. A limiting plate is provided on the side of the connecting plate near the center of the bottom shell, and a connecting part is provided on the side away from the center of the bottom shell.

10. A photovoltaic large-scale shutdown switch according to claim 9, characterized in that, The connecting part is a U-shaped plate, and the middle part of the pad is set with concave ends, which can be engaged with the U-shaped plate, and the lower end face of the U-shaped plate does not exceed the lower end face of the pad. The first flat plate part and the second flat plate part of the U-shaped plate are both provided with strip-shaped connecting holes.

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