Anti-islanding protection device

Abstract

The utility model provides an anti-islanding protection device, which relates to the technical field of anti-islanding protection devices and comprises an anti-islanding protection device body, a photovoltaic grid-connected cabinet door is arranged on one side of the anti-islanding protection device body, an operation window is arranged in the photovoltaic grid-connected cabinet door, and the anti-islanding protection device body is located on one side of the operation window. The side, close to the anti-islanding protection device body, of the photovoltaic grid-connected cabinet door is fixedly connected with a first shell, the anti-islanding protection device body is slidably connected to the inner side of the first shell, one side of the photovoltaic grid-connected cabinet door is fixedly connected with a supporting plate, and the supporting plate is located below the first shell. According to the anti-islanding protection device, the spring exerts force on the connecting block, the anti-islanding protection device body and the connecting block are clamped and fixed, the anti-islanding protection device body can be rapidly disassembled and assembled, and flexibility is higher; according to the anti-islanding protection device, the two fixing rods are close to the connecting line, so that the connecting line is fixed, and normal operation of the anti-islanding protection device is prevented from being affected by loosening or falling of the connecting line when a worker mistakenly touches the connecting line.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-islanding protection devices, in particular to an anti-islanding protection device. Background Art

[0002] The anti-islanding protection device (also known as the anti-islanding protection system) is a device used to protect the safety of the power grid. When a fault occurs in the power grid, it can automatically detect the fault point and quickly send out an alarm signal to control the relevant circuit breaker to trip or isolate the power supply, thereby preventing the occurrence of the islanding effect. The islanding effect refers to when a part of the line in the power grid is disconnected from the main grid due to a fault or maintenance, while the part of the line is still energized, forming an isolated power grid area, which may cause voltage anomalies, equipment damage and personnel safety problems. The device is mainly composed of an intelligent controller, an intelligent sensor relay and auxiliary equipment;

[0003] After searching, the utility model with the announcement number CN218976085U discloses an anti-islanding protection device. Although the utility model patent solves the problem that the existing anti-islanding protection device only has heat dissipation holes to dissipate heat and cool down the inside, the heat dissipation effect is not ideal, and as dust accumulates, the heat dissipation effect will be reduced;

[0004] First, most of the existing anti-islanding protection devices are directly installed on the photovoltaic grid-connected cabinet door. When the anti-islanding protection device is damaged and needs to be repaired and replaced, it is difficult to quickly remove and install the anti-islanding protection device from the cabinet door, and the flexibility is low;

[0005] Second, the existing anti-islanding protection device lacks a fixing mechanism for the wire plug port. When the staff touches the connecting wire by mistake, it is easy to cause the connecting wire to loosen or fall off, affecting the normal use of the anti-islanding protection device;

[0006] Therefore, an anti-islanding protection device is proposed. Utility Model Content

[0007] In view of this, the utility model provides an anti-islanding protection device to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0008] The technical solution of the utility model is achieved as follows: an anti-islanding protection device comprises an anti-islanding protection device body, a photovoltaic grid-connected cabinet door is arranged on one side of the anti-islanding protection device body, an operation window is opened in the photovoltaic grid-connected cabinet door, the anti-islanding protection device body is located on the side of the operation window, a shell one is fixedly connected to a side of the photovoltaic grid-connected cabinet door close to the anti-islanding protection device body, the anti-islanding protection device body is slidably connected to the inner side of the shell one, a support plate is fixedly connected to one side of the photovoltaic grid-connected cabinet door, the support plate is located below the shell one, a shell two is fixedly connected to the upper surface of the support plate, a clamping block is hinged in the shell two, a limiting groove two is opened on a side of the clamping block close to the anti-islanding protection device body, a connecting block is connected in the limiting groove two, the connecting block is fixedly connected to the anti-islanding protection device body, a support block two is fixedly connected to a side of the clamping block away from the connecting line, a spring is fixedly connected to the bottom of the support block two, and the spring is fixedly connected to the support plate.

[0009] Further preferably, a wire insertion port is provided on one side of the anti-islanding protection device body, a connecting wire is inserted into the wire insertion port, a support block 1 is fixedly connected to the side of the anti-islanding protection device body close to the connecting wire, a short rod is rotatably connected to the support block 1, a threaded rod 1 is fixedly connected to the top of the short rod, a handle is fixedly connected to the top of the threaded rod 1, a threaded rod 2 is fixedly connected to the bottom of the short rod, the threaded directions of the threaded rod 1 and the threaded rod 2 are opposite, the threaded rod 2 and the threaded rod 1 are threadedly connected to fixing rods on the outer walls, the fixing rods are located on the upper and lower sides of the connecting wire, and a limiting groove 1 is provided on the side of the fixing rod close to the connecting wire.

[0010] Further preferably, the number of the shells 1 is two, and the two shells 1 are located on both sides of the anti-islanding protection device body. The two shells 1 are used to limit the displacement of the anti-islanding protection device body.

[0011] Further preferably, the connecting wires, the limiting grooves 1 and the wire insertion ports are provided in multiple groups, and the number and positions of the limiting grooves 1 correspond to the wire insertion ports.

[0012] Further preferably, the second shell, the clamping block, the second limiting groove and the connecting block are provided in two groups, and the two groups of the second shell and the connecting block are located on both sides of the anti-islanding protection device body. The two groups of the second shell and the connecting block cooperate with each other to fix the anti-islanding protection device body and prevent the anti-islanding protection device body from falling.

[0013] Further preferably, the support block 1, short rod and threaded rod 1 are provided in two groups, and the two groups of the support block 1, short rod and threaded rod 1 are located on both sides of the plug-in port. The two groups of the support block 1, short rod and threaded rod 1 cooperate with each other to adjust the distance between the two fixed rods to ensure the stability of the distance between the two fixed rods.

[0014] Further preferably, the shape of the threaded rod 1 is a "C" shape, and the "C" shape of the threaded rod 1 faces the anti-islanding protection device body.

[0015] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0016] 1. The utility model slides the anti-islanding protection device body along the position of the housing 1 into the housing 1, aligns the connecting block with the position of the limiting groove 2, presses the anti-islanding protection device body downward, and the connecting blocks on both sides of the anti-islanding protection device body push the clamping blocks, so that the spring is compressed to store elastic potential energy. When the connecting block is inserted into the limiting groove 2, the spring releases the elastic potential, applies force to the connecting block, and clamps the anti-islanding protection device body and the connecting block, so that the anti-islanding protection device body can be quickly disassembled and assembled, and the flexibility is higher;

[0017] 2. The utility model manually rotates two sets of handles, and the rotation of the handles drives the threaded rod 1, the short rod and the threaded rod 2 to rotate, so that the two fixing rods approach the connecting wire, thereby fixing the connecting wire to prevent the connecting wire from loosening or falling when the staff accidentally touches the connecting wire, affecting the normal operation of the anti-islanding protection device.

[0018] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a partial structural schematic diagram of the utility model;

[0022] Figure 3 This is a schematic diagram of the main structure of the anti-islanding protection device of the utility model;

[0023] Figure 4 It is a schematic diagram of the local structure of the fixed structure of the utility model.

[0024] Figure numerals: 1. Anti-islanding protection device body; 2. Connecting wire; 3. Support block 1; 4. Short rod; 5. Threaded rod 1; 6. Threaded rod 2; 7. Fixed rod; 8. Limiting groove 1; 9. Handle; 10. Photovoltaic grid-connected cabinet door; 11. Operation window; 12. Shell 1; 13. Support plate; 14. Shell 2; 15. Clamp; 16. Limiting groove 2; 17. Support block 2; 18. Spring; 19. Connecting block; 20. Plug port. DETAILED DESCRIPTION

[0025] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0026] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0027] like Figure 1-4 As shown, the embodiment of the utility model provides an anti-islanding protection device: comprising an anti-islanding protection device body 1, a photovoltaic grid-connected cabinet door 10 is arranged on one side of the anti-islanding protection device body 1, an operation window 11 is opened in the photovoltaic grid-connected cabinet door 10, the anti-islanding protection device body 1 is located on one side of the operation window 11, a side of the photovoltaic grid-connected cabinet door 10 close to the anti-islanding protection device body 1 is fixedly connected with a shell 12, the anti-islanding protection device body 1 is slidably connected to the inner side of the shell 12, and a support is fixedly connected to one side of the photovoltaic grid-connected cabinet door 10 Plate 13, support plate 13 is located below shell 12, the upper surface of support plate 13 is fixedly connected with shell 2 14, a clamping block 15 is hinged in shell 2 14, a side of clamping block 15 close to the anti-islanding protection device body 1 is provided with limiting groove 2 16, limiting groove 2 16 is connected with connecting block 19, connecting block 19 is fixedly connected to the anti-islanding protection device body 1, a side of clamping block 15 away from connecting line 2 is fixedly connected with supporting block 2 17, a spring 18 is fixedly connected to the bottom of supporting block 2 17, and spring 18 is fixedly connected to support plate 13.

[0028] In one embodiment, a plug-in port 20 is provided on one side of the anti-islanding protection device body 1, and a connecting line 2 is plugged into the plug-in port 20. A support block 3 is fixedly connected to the side of the anti-islanding protection device body 1 close to the connecting line 2. A short rod 4 is rotatably connected to the support block 3. A threaded rod 5 is fixedly connected to the top of the short rod 4. A handle 9 is fixedly connected to the top of the threaded rod 5. A threaded rod 2 6 is fixedly connected to the bottom of the short rod 4. The threaded directions of the threaded rod 1 5 and the threaded rod 2 6 are opposite. The outer walls of the threaded rod 2 6 and the threaded rod 1 5 are threadedly connected to a fixing rod 7. The fixing rod 7 is located at the upper and lower sides of the connecting line 2. A limiting groove 8 is provided on the side of the fixing rod 7 close to the connecting line 2. There are two shells 12, and the two shells 12 are located on both sides of the anti-islanding protection device body 1. The two shells 12 are used to limit the displacement of the anti-islanding protection device body 1.

[0029] In one embodiment, the connecting wire 2, the limiting groove 18 and the wire insertion port 20 are provided in multiple groups, and the number and position of the limiting groove 18 correspond to the wire insertion port 20. The shell 2 14, the clamping block 15, the limiting groove 16 and the connecting block 19 are provided in two groups, and the two groups of the shell 2 14 and the connecting block 19 are located on both sides of the anti-islanding protection device body 1. The two groups of the shell 2 14 and the connecting block 19 cooperate with each other to fix the anti-islanding protection device body 1 and prevent the anti-islanding protection device body 1 from falling. The support block 1 3, the short rod 4 and the threaded rod 1 5 are provided in two groups, and the two groups of the support block 1 3, the short rod 4 and the threaded rod 1 5 are located on both sides of the wire insertion port 20. The two groups of the support block 1 3, the short rod 4 and the threaded rod 1 5 cooperate with each other to adjust the distance between the two fixed rods 7 to ensure that the distance between the two fixed rods 7 is stable. The shape of the threaded rod 1 5 is "C" shaped, and the "C" shape of the threaded rod 1 5 faces the anti-islanding protection device body 1.

[0030] When the utility model is working: the support block 13 and the connecting block 19 are fixed to the outside of the anti-islanding protection device body 1 by glue, and the shell 12 and the support plate 13 are installed to the inside of the photovoltaic grid-connected cabinet door 10 by glue. In a static state, the lower limit groove 16 is tilted inwardly under the cooperation of the spring 18. When the anti-islanding protection device body 1 needs to be installed on the photovoltaic grid-connected cabinet door 10, the anti-islanding protection device body 1 is slid into the shell 12 along the position of the shell 12, and the connecting block 19 is aligned with the position of the limit groove 16, and the anti-islanding protection device body 1 is pressed downward. At this time, the connecting blocks 19 on both sides of the anti-islanding protection device body 1 push the clamping block 15, so that the spring 18 is compressed to store elastic potential energy. When the connecting block 19 is stuck in the limit groove 16, the spring 18 releases the elastic potential to apply to the connecting block 19 Apply force to clamp and fix the anti-islanding protection device body 1 and the connecting block 19. When the anti-islanding protection device body 1 needs to be replaced, re-stick the connecting block 19 and push the anti-islanding protection device body 1 and the connecting block 19 back between the limit slot 2 16 to quickly complete the disassembly and assembly of the anti-islanding protection device body 1, which has higher flexibility. After the staff has completed the plugging of the connecting wire 2 according to actual needs, manually rotate the two sets of handles 9. The rotation of the handles 9 drives the threaded rod 1 5, the short rod 4 and the threaded rod 2 6 to rotate. Since the thread directions of the threaded rod 1 5 and the threaded rod 2 6 are opposite, the two fixing rods 7 approach the connecting wire 2 during the rotation of the threaded rod 1 5, the short rod 4 and the threaded rod 2 6, thereby fixing the connecting wire 2 to prevent the connecting wire 2 from loosening or falling when the staff accidentally touches the connecting wire 2, affecting the normal operation of the anti-islanding protection device.

[0031] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An anti-islanding protection device, characterized in that: The invention comprises an anti-islanding protection device body (1), a photovoltaic grid-connected cabinet door (10) is arranged on one side of the anti-islanding protection device body (1), an operation window (11) is opened in the photovoltaic grid-connected cabinet door (10), the anti-islanding protection device body (1) is located on one side of the operation window (11), a side of the photovoltaic grid-connected cabinet door (10) close to the anti-islanding protection device body (1) is fixedly connected to a shell body (12), the anti-islanding protection device body (1) is slidably connected to the inner side of the shell body (12), a support plate (13) is fixedly connected to one side of the photovoltaic grid-connected cabinet door (10), and the support plate (13) is located on the shell body (12). ), the upper surface of the support plate (13) is fixedly connected to a shell body (14), a clamping block (15) is hinged inside the shell body (14), a limiting groove (16) is provided on the side of the clamping block (15) close to the anti-islanding protection device body (1), a connecting block (19) is connected inside the limiting groove (16), and the connecting block (19) is fixedly connected to the anti-islanding protection device body (1), and a supporting block (17) is fixedly connected to the side of the clamping block (15) away from the connecting line (2), and a spring (18) is fixedly connected to the bottom of the supporting block (17), and the spring (18) is fixedly connected to the support plate (13).

2. The anti-islanding protection device according to claim 1, characterized in that: A wire insertion port (20) is provided on one side of the anti-islanding protection device body (1), a connecting wire (2) is inserted into the wire insertion port (20), a support block (3) is fixedly connected to the side of the anti-islanding protection device body (1) close to the connecting wire (2), a short rod (4) is rotatably connected to the support block (3), a threaded rod (5) is fixedly connected to the top of the short rod (4), a handle (9) is fixedly connected to the top of the threaded rod (5), a threaded rod (6) is fixedly connected to the bottom of the short rod (4), the threaded directions of the threaded rod (5) and the threaded rod (6) are opposite, the threaded rod (6) and the threaded rod (5) are threadedly connected to the outer walls of the threaded rod (6) and the threaded rod (5), the fixed rod (7) is located at the upper and lower sides of the connecting wire (2), and a limiting groove (8) is provided on the side of the fixed rod (7) close to the connecting wire (2).

3. The anti-islanding protection device according to claim 1, characterized in that: The number of the shells one (12) is two, and the two shells one (12) are located on both sides of the anti-islanding protection device body (1).

4. The anti-islanding protection device according to claim 2, characterized in that: The connecting wire (2), the limiting groove one (8) and the wire insertion port (20) are provided in multiple groups, and the number and position of the limiting groove one (8) correspond to the wire insertion port (20).

5. The anti-islanding protection device according to claim 1, characterized in that: The second shell (14), the clamping block (15), the second limiting groove (16) and the connecting block (19) are provided in two groups, and the two groups of the second shell (14) and the connecting block (19) are located on both sides of the anti-islanding protection device body (1).

6. The anti-islanding protection device according to claim 2, characterized in that: The support block 1 (3), the short rod (4) and the threaded rod 1 (5) are provided in two groups, and the two groups of the support block 1 (3), the short rod (4) and the threaded rod 1 (5) are located on both sides of the wire insertion port (20).

7. The anti-islanding protection device according to claim 2, characterized in that: The threaded rod one (5) is in a "C" shape, and the "C" shape of the threaded rod one (5) faces the anti-islanding protection device body (1).

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