Photovoltaic metering cabinet

Abstract

The utility model discloses a photovoltaic metering cabinet, including the cabinet body and install in the isolation switch, main circuit breaker and multiple sets of metering unit in cabinet body, and metering unit includes fixed base and the pluggable metering module, and fixed base horizontal installation is installed on the mounting guide rail in the cabinet body, and fixed base is connected with corresponding current transformer and collector electricity, when using this device, through the fixed base of the metering unit of setting and the pluggable metering module design, the plug -in structure of collocating male connector and female connector, realize the independent operation and maintenance of single group metering module, compared with prior art, the utility model's advantage lies in, when replacing or overhauling, do not need to cut off the main circuit in the cabinet body, do not need to disassemble complex wiring, only through the unlocking structure can complete the plugging and unplugging quickly, greatly shorten the operation and maintenance time under multiple sets of metering scene, improve photovoltaic system overall operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic power generation metering equipment technology, specifically a photovoltaic metering cabinet. Background Technology

[0002] With the rapid development of the photovoltaic industry, the scale and complexity of distributed photovoltaic power stations are increasing day by day. As the core equipment for grid connection and settlement of photovoltaic systems, photovoltaic metering cabinets undertake the key tasks of electricity metering and monitoring. At present, most photovoltaic metering cabinets on the market adopt fixed installation metering devices. All metering units are usually directly connected to the main circuit through hard wires and share the same power supply and signal path.

[0003] This traditional design has revealed significant flaws in actual operation and maintenance. When a single metering unit fails or requires periodic calibration, maintenance personnel must cut off the main power supply to the entire metering cabinet, causing the entire photovoltaic system to shut down. In large power plants with multiple metering units, this means a huge loss of power generation. In addition, the replacement process requires technicians to use specialized tools to disassemble complex cables, which is time-consuming and requires high skill levels. This not only significantly increases the time cost of operation and maintenance but also causes considerable economic losses due to the long-term shutdown of the system. At the same time, although the traditional power-off operation avoids the risks of live work, it cannot avoid possible misoperations in complex wiring and lacks a mechanism to fundamentally ensure the safety of operation and maintenance from a mechanical structure perspective. Utility Model Content

[0004] In view of the above problems, the technical problem to be solved by this utility model is to provide a photovoltaic metering cabinet.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a photovoltaic metering cabinet, including a cabinet body and a disconnecting switch, a main circuit breaker and multiple metering units installed in the cabinet body, characterized in that: the metering unit includes a fixed base and a pluggable metering module, the fixed base is horizontally installed on the mounting rail inside the cabinet body, the fixed base is electrically connected to the corresponding current transformer and data collector, a female connector is installed on the front end face of the fixed base, and a male connector matching the female connector is provided on the rear end face of the metering module, and the metering module is electrically connected to the fixed base through the plugging of the male connector and the female connector.

[0006] A further preferred embodiment of this utility model is as follows: the female connector is provided with a plurality of independent pins, and the male connector is provided with a socket that mates with the pins. The pins include current pins for transmitting current signals, voltage pins for transmitting voltage signals, power pins for providing operating power, and communication pins for transmitting data.

[0007] A further preferred embodiment of this utility model is as follows: an upper fixing plate and a lower fixing plate are fixedly installed at the upper and lower ends of the fixed base, respectively; a locking pin that can move up and down is vertically installed on the upper fixing plate; and a locking groove that matches the lower end of the locking pin is opened on the upper surface of the metering module.

[0008] A further preferred embodiment of this utility model is as follows: the lower end of the locking pin facing the metering module is a downwardly inclined guide slope, and a return spring is sleeved on the outer wall of the locking pin. The lower end of the return spring abuts against the lower limit block fixedly connected to the locking pin, and its upper end abuts against the lower limit block fixedly connected to the upper fixing plate.

[0009] A further preferred embodiment of this utility model is as follows: a miniature circuit breaker is installed on the upper end of the upper fixed plate, a stationary contact is provided at the bottom of the miniature circuit breaker, a movable contact that can move up and down is provided above the stationary contact, an insulating push rod is fixedly connected to the upper end of the movable contact, and the upper end of the insulating push rod is fixedly connected to the upper end of the locking pin through a linkage crossbar.

[0010] A further preferred embodiment of this utility model is as follows: an L-shaped locking support is provided at the bottom of the linkage crossbar, the horizontal part of the L-shaped locking support is slidably inserted into a rectangular guide sleeve fixedly installed on the upper end of the upper fixed plate, and an unlocking pull rod is fixedly installed on one side of the vertical part of the L-shaped locking support.

[0011] A further preferred embodiment of this utility model is as follows: rectangular guide bars are provided at both the upper and lower ends of the metering module, and guide grooves adapted to the rectangular guide bars are provided on the inner sides of the upper and lower fixing plates respectively.

[0012] Compared with the prior art, the present invention has the following advantages: The present invention, through the design of the fixed base of the metering unit and the pluggable metering module, combined with the plugging structure of male and female connectors, realizes the independent operation and maintenance of a single metering module. When replacing or repairing, there is no need to cut off the main circuit inside the cabinet or disassemble the complex wiring. The plugging and unplugging can be completed quickly by simply unlocking the structure, which greatly shortens the operation and maintenance time in multiple metering scenarios and improves the overall operating efficiency of the photovoltaic system.

[0013] This utility model employs a linkage mechanism between a miniature circuit breaker, a locking pin, and a linkage crossbar. To unlock, the linkage crossbar must first be pulled, which then causes the moving contact to separate from the stationary contact, forcibly cutting off the metering module circuit. Once inserted into place, the locking pin resets to reconnect the circuit, thus structurally eliminating the risk of live operation and ensuring operational safety. Attached Figure Description

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0015] Figure 1 This is a schematic diagram of the overall structure of the photovoltaic metering cabinet; Figure 2 This is a schematic diagram of the overall structure of the metering unit in the photovoltaic metering cabinet; Figure 3 This is a schematic diagram of the overall structure of the fixed base in the photovoltaic metering cabinet; Figure 4 This is a schematic diagram of the rear structure of the metering module in the photovoltaic metering cabinet; Figure 5 This is a side sectional view of the upper fixing plate in the photovoltaic metering cabinet; Figure 6 for Figure 5 A magnified view of a section at point A in the middle; Figure 7 This is a sectional view of the rear end of the upper fixed plate in the photovoltaic metering cabinet; Figure 8 for Figure 7 A magnified view of a section at point B.

[0016] In the diagram: 1. Cabinet; 2. Disconnecting switch; 3. Main circuit breaker; 4. Metering unit; 5. Current transformer; 6. Data collector; 7. Fixed base; 8. Metering module; 9. Mounting rail; 10. Female connector; 11. Male connector; 12. Upper fixing plate; 13. Lower fixing plate; 14. Locking pin; 15. Locking groove; 16. Return spring; 17. Lower limit block; 18. Upper limit block; 19. Miniature circuit breaker; 20. Stationary contact; 21. Moving contact; 22. Insulating push rod; 23. Linkage crossbar; 24. L-shaped locking support; 25. Rectangular guide sleeve; 26. Unlocking pull rod; 27. Rectangular guide strip; 28. Guide groove. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0018] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0019] This embodiment mainly describes the photovoltaic metering cabinet, as follows: Please see Figures 1-8 A photovoltaic metering cabinet includes a cabinet body 1 and a disconnecting switch 2, a main circuit breaker 3, and multiple metering units 4 installed inside the cabinet body 1. Each metering unit 4 includes a fixed base 7 and a pluggable metering module 8. The fixed base 7 is horizontally installed on a mounting rail 9 inside the cabinet body 1. The fixed base 7 is electrically connected to the corresponding current transformer 5 and data collector 6. A female connector 10 is installed on the front end of the fixed base 7, and a male connector 11 that matches the female connector 10 is provided on the rear end of the metering module 8. The metering module 8 achieves electrical connection with the fixed base 7 by plugging the male connector 11 into the female connector 10.

[0020] The photovoltaic metering cabinet provides installation space through the cabinet body 1, with an isolating switch 2 and a main circuit breaker 3 to control and protect the circuit. Multiple metering units 4 are used for metering photovoltaic power. Each metering unit 4 consists of a fixed base 7 and a pluggable metering module 8. The fixed base 7 is horizontally installed on the mounting rail 9 inside the cabinet body 1 to achieve stable fixation and establish electrical connection with the corresponding current transformer 5 and data collector 6. When the male connector 11 on the rear end of the metering module 8 is plugged into the female connector 10 on the front end of the fixed base 7, the two can be electrically connected, allowing the metering module 8 to be connected to the circuit for metering. The pluggable structure facilitates the installation, replacement, and maintenance of the metering module 8.

[0021] The female connector 10 has multiple independent pins, and the male connector 11 has sockets that mate with the pins. The pins include current pins for transmitting current signals, voltage pins for transmitting voltage signals, power pins for providing operating power, and communication pins for transmitting data.

[0022] Multiple independent pins in the female connector 10 mate with corresponding sockets in the male connector 11 to achieve a reliable electrical connection between the metering module 8 and the fixed base 7. The current pins are used to transmit the current signal collected by the current transformer 5, the voltage pins are used to transmit the voltage signal in the circuit, the power pins are used to provide working power to the metering module 8, and the communication pins are used for data transmission between the metering module 8 and external devices or systems. The corresponding pins and sockets with different functions ensure that the current signal, voltage signal, power supply and data are transmitted accurately and independently between the two.

[0023] The upper and lower fixing plates 12 and 13 are fixedly installed at the upper and lower ends of the fixed base 7, respectively. A locking pin 14 that can move up and down is vertically installed on the upper fixing plate 12. A locking groove 15 that matches the lower end of the locking pin 14 is opened on the upper end face of the metering module 8.

[0024] The fixed base 7 enhances structural stability through the upper fixed plate 12 and the lower fixed plate 13. The vertically mounted locking pin 14 on the upper fixed plate 12, which can move up and down, cooperates with the locking groove 15 on the upper end face of the metering module 8. When the metering module 8 is inserted into the fixed base 7 and in place, the locking pin 14 moves downward and inserts into the locking groove 15 to lock and fix the metering module 8, preventing it from loosening or falling off due to vibration during operation, and ensuring reliable electrical connection. When disassembly is required, the locking pin 14 can be moved upward to disengage from the locking groove 15 to release the lock.

[0025] The lower end of the locking pin 14 facing the metering module 8 is a downwardly inclined guide slope; a return spring 16 is sleeved on the outer wall of the locking pin 14, the lower end of the return spring 16 abuts against the lower limit block 17 which is fixedly connected to the locking pin 14, and its upper end abuts against the lower limit block 18 which is fixedly connected to the upper fixing plate 12.

[0026] The lower end of the locking pin 14 faces the guide slope of the metering module 8, which serves as a guide when the metering module 8 is inserted. When the upper end of the metering module 8 contacts the guide slope, it pushes the locking pin 14 to move upward. At this time, the return spring 16, which is sleeved on the outer wall of the locking pin 14, is compressed by the lower limit block 17. The upper limit block 18 provides support for the return spring 16. When the metering module 8 is fully inserted and the locking groove 15 corresponds to the position of the locking pin 14, the return spring 16 pushes the lower limit block 17 to move downward under the action of elasticity, which drives the locking pin 14 to insert into the locking groove 15 to achieve automatic locking and ensure that the metering module 8 is reliably fixed after insertion.

[0027] A miniature circuit breaker 19 is installed on the upper end of the upper fixed plate 12. A stationary contact 20 is provided at the bottom of the miniature circuit breaker 19. A movable contact 21 that can move up and down is provided above the stationary contact 20. An insulating push rod 22 is fixedly connected to the upper end of the movable contact 21. The upper end of the insulating push rod 22 is fixedly connected to the upper end of the locking pin 14 through a linkage crossbar 23.

[0028] The miniature circuit breaker 19 at the upper end of the upper fixed plate 12 is used to control the working circuit of the metering module 8. The stationary contact 20 at the bottom cooperates with the moving contact 21 above to realize the circuit opening and closing. When the locking pin 14 moves upward, the linkage crossbar 23 drives the insulating push rod 22 to move upward, thereby driving the moving contact 21 to move upward away from the stationary contact 20, so that the miniature circuit breaker 19 is opened and the working circuit of the metering module 8 is cut off. When the locking pin 14 moves downward, the linkage crossbar 23 drives the insulating push rod 22 to move downward, so that the moving contact 21 contacts the stationary contact 20, and the miniature circuit breaker 19 closes to connect the working circuit of the metering module 8. This realizes the linkage control of the insertion and removal of the metering module 8 and the circuit opening and closing to ensure operational safety.

[0029] The bottom of the linkage crossbar 23 is provided with an L-shaped locking support 24. The horizontal part of the L-shaped locking support 24 is slidably inserted into the rectangular guide sleeve 25 fixedly installed on the upper end of the upper fixed plate 12. An unlocking pull rod 26 is fixedly installed on one side of the vertical part of the L-shaped locking support 24.

[0030] An L-shaped locking support 24 is provided at the bottom of the linkage crossbar 23. The horizontal part of the L-shaped locking support 24 is slidably inserted into the rectangular guide sleeve 25 fixedly installed on the upper end of the upper fixed plate 12. The rectangular guide sleeve 25 provides guidance for the movement of the L-shaped locking support 24 to ensure its stable sliding. When unlocking is required, the linkage crossbar 23 is pulled upward first, and then the unlocking lever 26 on the vertical side of the L-shaped locking support 24 is pulled to drive the horizontal part of the L-shaped locking support 24 to slide in the rectangular guide sleeve 25 to the bottom of the linkage crossbar 23 for support. Then, the locking pin 14 is driven upward by the linkage crossbar 23, so that the locking pin 14 is disengaged from the locking groove 15 to unlock the metering module 8. The cooperation between the L-shaped locking support 24 and the rectangular guide sleeve 25 ensures the smoothness and reliability of the unlocking operation.

[0031] The metering module 8 is provided with rectangular guide bars 27 at both the top and bottom ends. The inner sides of the upper fixed plate 12 and the lower fixed plate 13 are provided with guide grooves 28 that are adapted to the rectangular guide bars 27.

[0032] The rectangular guide strips 27 at the top and bottom ends of the metering module 8 are adapted to the guide grooves 28 on the inner sides of the upper fixed plate 12 and the lower fixed plate 13. During the insertion and removal of the metering module 8, the rectangular guide strips 27 slide along the guide grooves 28 to provide guidance and positioning for the movement of the metering module 8, ensuring that the metering module 8 can be accurately aligned with the fixed base 7, so that the male connector 11 and the female connector 10 can be precisely connected. At the same time, it prevents the metering module 8 from shifting or tilting during the insertion and removal process, and improves the smoothness and accuracy of the insertion and removal operation.

[0033] Working principle: When the metering module 8 is damaged and needs to be replaced, first pull the linkage crossbar 23 upwards. Then, by pulling the unlocking lever 26 on one side of the vertical part of the L-shaped locking support 24, the horizontal part of the L-shaped locking support 24 will slide within the rectangular guide sleeve 25 until it moves to the bottom of the linkage crossbar 23 for support. At this time, the linkage crossbar 23 will move the locking pin 14 upwards, disengaging it from the locking groove 15 on the upper surface of the metering module 8. Simultaneously, the linkage crossbar 23 will move the moving contact 21 upwards via the insulating push rod 22, separating it from the stationary contact 20 of the miniature circuit breaker 19. The miniature circuit breaker 19 will then disconnect, cutting off the working circuit of the metering module 8. Next, the old metering module 8 will be pulled outwards along the guide grooves 28 of the upper fixing plate 12 and the lower fixing plate 13, separating its male connector 11 from the female connector 10 of the fixing base 7. When installing the new metering module 8, align the rectangular guide strips 27 at its upper and lower ends with the guide grooves 28 and push it in. During this process, the upper surface of the metering module 8 pushes the locking pin 14 upward and compresses the return spring 16. After full insertion, the return spring 16 pushes the locking pin 14 into the locking groove 15. At the same time, the linkage crossbar 23 drives the moving contact 21 downward to contact the stationary contact 20, the miniature circuit breaker 19 closes, the new module is powered on, and current, voltage signals and data are transmitted through the corresponding pins, completing the replacement.

[0034] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", 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. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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.

[0035] The photovoltaic metering cabinet provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand this utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A photovoltaic metering cabinet, comprising a cabinet body and a disconnecting switch, a main circuit breaker, and multiple metering units installed within the cabinet body, characterized in that: The metering unit includes a fixed base and a pluggable metering module. The fixed base is horizontally installed on a mounting rail inside the cabinet. The fixed base is electrically connected to the corresponding current transformer and data collector. A female connector is installed on the front end of the fixed base, and a male connector that matches the female connector is provided on the rear end of the metering module. The metering module achieves electrical connection with the fixed base by plugging in the male connector and the female connector.

2. The photovoltaic metering cabinet according to claim 1, characterized in that: The female connector has multiple independent pins, and the male connector has sockets that mate with the pins. The pins include current pins for transmitting current signals, voltage pins for transmitting voltage signals, power pins for providing operating power, and communication pins for transmitting data.

3. The photovoltaic metering cabinet according to claim 1, characterized in that: The upper and lower fixing plates are fixedly installed at the upper and lower ends of the fixed base, respectively. A locking pin that can move up and down is vertically installed on the upper fixing plate. A locking groove that matches the lower end of the locking pin is opened on the upper surface of the metering module.

4. The photovoltaic metering cabinet according to claim 3, characterized in that: The lower end of the locking pin facing the metering module is a downwardly inclined guide slope. A return spring is sleeved on the outer wall of the locking pin. The lower end of the return spring abuts against the lower limit block that is fixedly connected to the locking pin, and its upper end abuts against the lower limit block that is fixedly connected to the upper fixing plate.

5. The photovoltaic metering cabinet according to claim 3, characterized in that: A miniature circuit breaker is installed on the upper end of the upper fixed plate. A stationary contact is provided at the bottom of the miniature circuit breaker. A movable contact that can move up and down is provided above the stationary contact. An insulating push rod is fixedly connected to the upper end of the movable contact. The upper end of the insulating push rod is fixedly connected to the upper end of the locking pin through a linkage crossbar.

6. The photovoltaic metering cabinet according to claim 5, characterized in that: The bottom of the linkage crossbar is provided with an L-shaped locking support. The horizontal part of the L-shaped locking support is slidably inserted into a rectangular guide sleeve fixedly installed on the upper end of the upper fixed plate. An unlocking pull rod is fixedly installed on one side of the vertical part of the L-shaped locking support.

7. The photovoltaic metering cabinet according to claim 3, characterized in that: The metering module is provided with rectangular guide bars at both the top and bottom ends, and guide grooves adapted to the rectangular guide bars are provided on the inner sides of the upper and lower fixing plates respectively.

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