Photovoltaic power station grid-connected protection device

Abstract

The utility model discloses a grid-connected protection device for a photovoltaic power station, and relates to the technical field of grid-connected protection devices. The device comprises a cabinet body, a fixing plate is fixed to the upper portion of the interior of the cabinet body, a lead screw is arranged on the fixing plate, a threaded plate is arranged on the outer surface of the lead screw, when the device is disassembled and assembled, a worker rotates the lead screw, then the threaded plate is made to move, the threaded plate moves to enable an installation plate and an installation shell to move outwards, and therefore the device is disassembled and assembled. In this way, a worker is not prone to being limited by space during operation, operation is more convenient, during installation, the worker attaches a clamping plate to the surface of an installation plate and places the clamping plate on the inner side of a supporting plate, so that a jacking spring is shrunk, then the worker rotates a limiting rod through a connecting shaft, the limiting rod limits the clamping plate, and the clamping plate is prevented from being damaged. And therefore, the purpose of fixedly mounting the mounting shell is achieved, bolts and dismounting tools are not needed, and the operation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of grid-connected protection devices, in particular to a photovoltaic power station grid-connected protection device. Background Art

[0002] The protection device is an electric power facility and personnel protection device installed between the power grid and the small power generation facility. Its main function is to cut off the electrical connection between the power grid and the small power generation facility in the event of a power outage, to prevent the power generation facility from continuing to transmit power to the grid in the event of a power outage, and to avoid output overload of the power generation facility or accidental electric shock to personnel in the event of a power outage.

[0003] The prior art discloses a photovoltaic power station grid-connected protection device with application number CN202221427730.6, comprising a mounting plate and a mounting shell integrated on the mounting plate; the mounting shell bulges toward the top of the mounting plate, and a control circuit is integrated on the inner side of the mounting shell; a handle is arranged on the top of the mounting shell, and the handle is connected to a gate plate inside the mounting shell; a terminal block extending outward is arranged on the mounting plate, and the terminal block is a conductive plate; a plurality of terminal posts are arranged on the mounting plate, and the terminal posts are in contact with the terminal block and maintain electrical connection; the terminal posts include a limit ring and a movable column in the middle; the movable column moves up and down along the vertical direction; a notch is arranged on one side of the movable column, and a clamping piece is arranged on one side of the terminal post, and the clamping piece includes a movable rod and a clamping plate; a rotating shaft is arranged at the bottom of the movable plate, and the movable rod rotates around the rotating shaft; a contact plate is connected to the other end of the rotating shaft, and the contact plate is inserted from the opening of the limit ring and extends to the notch on the movable column; the utility model is convenient to install and connect, and the wiring stability is better, which improves the safety of the networking operation of the photovoltaic power station.

[0004] However, the device is clearly stated in the manual that a plurality of positioning holes are preset on the mounting plate; bolts are passed through the positioning holes to fix to the power distribution cabinet. This type of fixation requires the use of a manual wrench or an electric wrench for operation during installation, which is more troublesome to operate. In addition, during operation, due to the small space of the power distribution cabinet and the presence of other components, the space is limited during operation, making operation very inconvenient, which greatly affects the efficiency of disassembly and assembly. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a photovoltaic power station grid-connected protection device to solve the technical problems in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a photovoltaic power station grid-connected protection device, comprising a cabinet, a fixing plate is fixed on the upper interior of the cabinet, a screw rod is arranged on the fixing plate, and a threaded plate is arranged on the outer surface of the screw rod, a mounting plate is fixed on the bottom of the threaded plate, a clamping plate is arranged on the outer surface of the mounting plate, a mounting shell is arranged on the outer surface of the clamping plate, a support plate is fixed on the edge of the mounting plate, and the outer surface of the support plate is connected to a limiting rod via a connecting shaft.

[0007] Furthermore, a groove is formed on the outer surface of the mounting plate, and the interior of the groove is connected to a tightening plate via a tightening spring.

[0008] By adopting the above technical solution, after the clamping plate is limited and fixed by the limiting rod, the clamping spring cooperates with the clamping plate to apply pressure to the clamping plate, and then the clamping plate cooperates with the limiting rod to clamp and fix the clamping plate.

[0009] Furthermore, a connecting plate is fixed below the outer surface of the mounting shell, and a terminal block is provided at the bottom of the mounting shell, the outer surface of the terminal block is penetrated by a through hole, a pull rod is penetrated by the outer surface of the connecting plate, and a wire pressing column is fixed at one end of the pull rod, and a compression spring is provided on the outer surface of the pull rod.

[0010] By adopting the above technical solution, when performing wiring work, the staff aligns the wire terminal ring with the through hole, and then loosens the pull rod. Under the action of the compression spring, the wire pressing post will be inserted into the wire terminal ring and pressurize it, so that the guide terminal ring is fixed on the surface of the wiring block.

[0011] Furthermore, the wire pressing posts are provided in a plurality of groups, and the plurality of groups of wire pressing posts are in a cone barrel shape.

[0012] By adopting the above technical solution, the cone barrel design makes the wire crimping post suitable for wire terminal rings with more diameters, so that the wire terminal ring is tightly attached to the terminal block.

[0013] Furthermore, a crank is fixed to the end of the screw rod, and a rubber sleeve is provided on the outer surface of the crank.

[0014] By adopting the above technical solution, the crank handle is convenient for the staff to rotate the screw rod, and the rubber sleeve can increase the friction and feel of the crank handle.

[0015] Furthermore, the top of the threaded plate is in contact with the upper part of the interior of the cabinet.

[0016] By adopting the above technical solution, the design makes the threaded plate more stable when moving, so that the threaded plate will not rotate.

[0017] Furthermore, a pull ring is fixed to the other end of the pull rod.

[0018] By adopting the above technical solution, the design of the pull ring can make the pull rod operation more convenient.

[0019] Furthermore, the limiting rods are provided with four groups, and the four groups of limiting rods are in close contact with the clamping plate.

[0020] By adopting the above technical solution, the limiting rod can press and limit the clamping plate, thereby achieving the purpose of installing and fixing the clamping plate.

[0021] Furthermore, the support plates are provided in four groups, and the four groups of support plates are distributed at the four corners of the mounting plate in a rectangular shape, and the clamping plates are located on the inner sides of the four groups of support plates.

[0022] By adopting the above technical solution, four groups of support plates can limit and support the pallet, thereby improving the stability of the pallet after installation.

[0023] In summary, the utility model mainly has the following beneficial effects:

[0024] 1. When the utility model disassembles and assembles the device, the staff rotates the screw rod to move the threaded plate, and the movement of the threaded plate causes the mounting plate and the mounting shell to move outward, so that the staff is not easily restricted by space during operation, and the operation is more convenient. When installing, the staff attaches the card plate to the surface of the mounting plate and places it on the inner side of the support plate, so that the tightening spring contracts, and then the staff rotates the limit rod through the connecting shaft, so that the limit rod limits the card plate, thereby achieving the purpose of fixing the mounting shell, without the use of bolts and disassembly and assembly tools, the operation is more convenient, and under the cooperation of the tightening spring and the tightening plate, pressure can be applied to the card plate, so that the card plate is fixed more firmly.

[0025] 2. The utility model is provided with a pull rod, a clamping spring, a wire pressing post and a through hole. When performing wiring work, the staff pulls the pull rod to separate the wire pressing post from the through hole, and then the staff places the wire terminal ring on the wiring block and corresponds to the position of the through hole. Then the staff loosens the pull rod, and with the cooperation of the clamping spring, the wire pressing post will be inserted into the wire terminal ring and the through hole, and the wire pressing post is in a cone barrel shape, thereby meeting the needs of wire terminal rings of different diameters, so that the wire terminal ring is tightly attached to the wiring block, which is more convenient to install and has better wiring stability, thereby improving the network operation safety of the photovoltaic power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 This is a schematic diagram of the card structure of the utility model;

[0028] Figure 3This is a schematic diagram of the mounting plate structure of the utility model;

[0029] Figure 4 It is a schematic diagram of the installation shell structure of the utility model.

[0030] In the figure: 1. cabinet; 2. fixing plate; 3. screw rod; 4. threaded plate; 5. mounting plate; 6. clamping plate; 7. mounting shell; 8. support plate; 9. connecting shaft; 10. limit rod; 11. tightening spring; 12. tightening plate; 13. connecting plate; 14. terminal block; 15. through hole; 16. pull rod; 17. tightening spring; 18. wire pressing column; 19. pull ring; 20. groove; 21. crank handle. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0032] The following describes an embodiment of the utility model based on its overall structure.

[0033] Embodiment 1: A photovoltaic power station grid-connected protection device, such as Figure 1-Figure 4 As shown, it includes a cabinet 1, a fixing plate 2 is fixed on the upper part of the interior of the cabinet 1, a screw rod 3 is provided on the fixing plate 2, and a threaded plate 4 is provided on the outer surface of the screw rod 3, a mounting plate 5 is fixed to the bottom of the threaded plate 4, a clamping plate 6 is provided on the outer surface of the mounting plate 5, a mounting shell 7 is provided on the outer surface of the clamping plate 6, a support plate 8 is fixed to the edge of the mounting plate 5, four groups of support plates 8 are provided, and the four groups of support plates 8 are rectangularly distributed at the four corners of the mounting plate 5, and the clamping plate 6 is located on the inner side of the four groups of support plates 8, the four groups of support plates 8 can limit and support the clamping plate 6, thereby improving the stability of the clamping plate 6 after installation, and the outer surface of the support plate 8 is connected to the limiting rod 10 through the connecting shaft 9, the limiting rod 10 is provided with four groups, and the four groups of limiting rods 10 are in close contact with the clamping plate 6, and the limiting rod 10 can press and limit the clamping plate 6, thereby achieving the purpose of installing and fixing the clamping plate 6.

[0034] See also Figure 1-Figure 2 In the above embodiment, a crank 21 is fixed to the end of the screw rod 3, and a rubber sleeve is provided on the outer surface of the crank 21. The crank 21 is convenient for the staff to rotate the screw rod 3, and the rubber sleeve can increase the friction and feel of the crank 21.

[0035] See also Figure 1 In the above embodiment, the top of the threaded plate 4 is in contact with the upper part of the interior of the cabinet 1. This design makes the threaded plate 4 more stable when moving, so that the threaded plate 4 will not rotate.

[0036] Example 2: See Figure 3 A groove 20 is provided on the outer surface of the mounting plate 5, and the interior of the groove 20 is connected to a clamping plate 12 via a clamping spring 11. After the card plate 6 is limited and fixed by the limiting rod 10, the clamping spring 11 cooperates with the clamping plate 12 to apply pressure to the card plate 6, and then the clamping plate 12 cooperates with the limiting rod 10 to clamp and fix the card plate 6, thereby improving the stability after installation.

[0037] Example 3: See Figure 2 and Figure 4 A connecting plate 13 is fixed under the outer surface of the mounting shell 7, and a terminal block 14 is provided at the bottom of the mounting shell 7. A through hole 15 is passed through the outer surface of the terminal block 14. A pull rod 16 is passed through the outer surface of the connecting plate 13, and a wire pressing column 18 is fixed at one end of the pull rod 16. A clamping spring 17 is provided on the outer surface of the pull rod 16. When performing wiring work, the staff aligns the wire terminal ring with the through hole 15, and then releases the pull rod 16. Under the action of the clamping spring 17, the wire pressing column 18 will be inserted into the wire terminal ring and pressurized, so that the guide terminal ring is fixed on the surface of the terminal block 14.

[0038] See also Figure 2 and Figure 4 In the above embodiment, there are multiple groups of wire crimping posts 18, and the multiple groups of wire crimping posts 18 are in a cone barrel shape. The cone barrel design makes the wire crimping posts 18 suitable for wire terminal rings with more diameters, so that the wire terminal rings are tightly attached to the terminal block 14.

[0039] See Figure Figure 2 and Figure 4 In the above embodiment, a pull ring 19 is fixed to the other end of the pull rod 16. The design of the pull ring 19 can make the pull rod 16 more convenient to operate.

[0040] The implementation principle of the utility model is as follows: when disassembling and assembling the device, the staff rotates the screw rod 3, thereby moving the threaded plate 4, and the movement of the threaded plate 4 causes the mounting plate 5 and the mounting shell 7 to move outward, so that the staff is not easily restricted by space during operation. When installing, the staff attaches the clamping plate 6 to the surface of the mounting plate 5 and places it on the inner side of the supporting plate 8, so that the tightening spring 11 is contracted, and then the staff rotates the limiting rod 10 through the connecting shaft 9, so that the limiting rod 10 limits the clamping plate 6, thereby achieving the purpose of fixing and installing the mounting shell 7, and when the tightening spring 11 and the top With the cooperation of the tightening plate 12, pressure can be applied to the card plate 6, so that the card plate 6 is fixed more firmly. When performing wiring work, the staff pulls the pull rod 16 to separate the wire pressing column 18 from the through hole 15, and then the staff places the wire terminal ring on the terminal block 14 and corresponds to the position of the through hole 15. Then the staff loosens the pull rod 16, and with the cooperation of the clamping spring 17, the wire pressing column 18 will be inserted into the wire terminal ring and the through hole 15, and the wire pressing column 18 is in a conical barrel shape, so as to meet the needs of wire terminal rings of different diameters, so that the wire terminal ring is tightly attached to the terminal block 14.

[0041] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A photovoltaic power station grid-connected protection device, comprising a cabinet (1), characterized in that: A fixing plate (2) is fixed on the upper part of the interior of the cabinet (1), a screw rod (3) is provided on the fixing plate (2), and a threaded plate (4) is provided on the outer surface of the screw rod (3), a mounting plate (5) is fixed on the bottom of the threaded plate (4), a clamping plate (6) is provided on the outer surface of the mounting plate (5), a mounting shell (7) is provided on the outer surface of the clamping plate (6), a support plate (8) is fixed on the edge of the mounting plate (5), and the outer surface of the support plate (8) is connected to a limit rod (10) via a connecting shaft (9).

2. The photovoltaic power station grid-connected protection device according to claim 1, characterized in that: The outer surface of the mounting plate (5) is provided with a groove (20), and the interior of the groove (20) is connected to a tightening plate (12) via a tightening spring (11).

3. The photovoltaic power station grid-connected protection device according to claim 1, characterized in that: A connecting plate (13) is fixed below the outer surface of the mounting shell (7), and a terminal block (14) is provided at the bottom of the mounting shell (7). A through hole (15) runs through the outer surface of the terminal block (14). A pull rod (16) runs through the outer surface of the connecting plate (13), and a wire pressing column (18) is fixed at one end of the pull rod (16). A compression spring (17) is provided on the outer surface of the pull rod (16).

4. The photovoltaic power station grid-connected protection device according to claim 3, characterized in that: The wire pressing posts (18) are provided in multiple groups, and the multiple groups of wire pressing posts (18) are in a cone barrel shape.

5. The photovoltaic power station grid-connected protection device according to claim 1, characterized in that: A crank handle (21) is fixed to the end of the screw rod (3), and a rubber sleeve is provided on the outer surface of the crank handle (21).

6. The photovoltaic power station grid-connected protection device according to claim 1, characterized in that: The top of the threaded plate (4) is in contact with the upper part of the interior of the cabinet (1).

7. The photovoltaic power station grid-connected protection device according to claim 3, characterized in that:

3. A pull ring (19) is fixed to the other end of the pull rod (16).

8. The photovoltaic power station grid-connected protection device according to claim 1, characterized in that: The limiting rods (10) are provided in four groups, and the four groups of limiting rods (10) are in close contact with the clamping plate (6).

9. The photovoltaic power station grid-connected protection device according to claim 1, characterized in that: The support There are four groups of plates (8), and the four groups of support plates (8) are distributed in a rectangular shape at the four corners of the mounting plate (5). The clamping plate (6) is located inside the four groups of supporting plates (8).

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