Photovoltaic grid-connected anti-islanding protection device

Abstract

The utility model relates to the technical field of photovoltaic grid-connected anti-islanding protection devices, in particular to a photovoltaic grid-connected anti-islanding protection device, which comprises a fixing seat, a protection device body, a plurality of fixing grooves, a plurality of fixing columns and a positioning mechanism. A plurality of fixing columns are fixedly arranged on the protection device body, the fixing columns can extend into the fixing grooves in a sliding mode, the positioning mechanism is arranged in the fixing base and used for positioning the fixing columns and the fixing grooves, a heat dissipation opening is formed in the side wall of the protection device body, and a filter screen is fixedly arranged in the heat dissipation opening. The protection device body can be conveniently mounted and dismounted by pulling the hand wheel and rotating the driving disc, so that the problem of low dismounting and mounting efficiency of the anti-islanding protection device in the related technology is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic grid-connected anti-islanding protection devices, and particularly relates to a photovoltaic grid-connected anti-islanding protection device. Background Technique

[0002] The anti-islanding protection device is mainly used to prevent the grid from having an islanding effect. Islanding is an electrical phenomenon that occurs when a part of the power grid is disconnected from the main power grid, and this part of the power grid is completely powered by the photovoltaic system. Since islanding can damage the safety of the public and power company maintenance personnel and the power supply quality, an anti-islanding device must be equipped in the photovoltaic power station. When the islanding phenomenon occurs, the grid connection point can be quickly cut off, so that the station can be quickly separated from the grid side, thus ensuring the life safety of the entire power station and relevant maintenance personnel. The anti-islanding protection device is mainly applicable to the small power grid-connected power supply systems of 110KV, 66KV, 35KV, 10KV and low-voltage 380V photovoltaic power stations.

[0003] Among them, the utility model patent with the publication number of CN217508272U discloses an anti-islanding protection device, which includes an anti-islanding protection device body and a fixed seat. The anti-islanding protection device body is located on the left side of the fixed seat. An installation groove is opened on the right side wall of the fixed seat. An installation seat is fixedly installed on the left outer wall of the anti-islanding protection device body. The installation seat is slidably installed in the installation groove. Card slots are opened at the top and bottom of the installation seat, and a clamping mechanism is arranged on the fixed seat.

[0004] When installing the anti-islanding protection device according to the above technical solution, the screw rod needs to be frequently turned, so the disassembly and assembly of the anti-islanding protection device are not convenient enough. Content of the Utility Model

[0005] The utility model provides a photovoltaic grid-connected anti-islanding protection device, which solves the problem of low disassembly and assembly efficiency of the anti-islanding protection device in the related technology.

[0006] The technical solution of the utility model is as follows: a photovoltaic grid-connected anti-islanding protection device, which includes a fixed seat, a protection device body, fixed grooves, fixed columns and a positioning mechanism;

[0007] The protection device body is arranged on one side of the fixed seat;

[0008] A plurality of the fixed grooves are opened on the fixed seat;

[0009] A plurality of the fixed columns are fixedly arranged on the protection device body, and the fixed columns can slidably extend into the fixed grooves;

[0010] The positioning mechanism is arranged in the fixed seat and is used for positioning between the fixed columns and the fixed grooves.

[0011] Preferably, the positioning mechanism includes:

[0012] A first positioning groove, which is arranged in a ring shape and is opened on the side wall of the fixed column;

[0013] A second positioning groove, and a plurality of the second positioning grooves are opened on the side wall of the fixed groove;

[0014] A first gear, which is rotatably arranged in the second positioning groove;

[0015] A positioning block, which is fixedly arranged on the first gear;

[0016] A synchronous rotation mechanism, which is arranged in the fixed seat and is used to control the synchronous rotation of a plurality of the first gears.

[0017] Furthermore, the synchronous rotation mechanism includes:

[0018] A first cavity, which is opened on the periphery of the fixed groove and is communicated with the second positioning groove;

[0019] An adjusting ring, which is rotatably arranged in the first cavity;

[0020] A first annular rack, which is fixedly arranged on the inner wall of the adjusting ring and meshes with the first gear;

[0021] A synchronous rotation component, which is arranged in the fixed seat and is used to control the rotation of a plurality of the adjusting rings.

[0022] Still further, the synchronous rotation component includes:

[0023] A second cavity, which is opened in the fixed seat and is communicated with the first cavity;

[0024] A second gear, which is rotatably arranged in the second cavity;

[0025] A second annular rack, which is fixedly arranged on the outer wall of the adjusting ring and meshes with the second gear;

[0026] A driving mechanism, which is arranged in the fixed seat and is used to control the rotation of the second gear.

[0027] Even further, the driving mechanism includes:

[0028] A third cavity, which is opened on one side of the second cavity;

[0029] The first bevel gear is rotatably arranged on the inner wall of the third cavity, and a connecting rod is fixedly arranged between the first bevel gear and the second gear;

[0030] The second bevel gear is rotatably arranged on the inner wall of the third cavity, and the second bevel gear meshes with the first bevel gear;

[0031] The driving assembly is arranged on the fixed seat and is used for controlling the rotation of the second bevel gear.

[0032] On the basis of the above scheme, the driving assembly includes:

[0033] The driving port is opened on the side wall of the third cavity;

[0034] The driving column is fixedly arranged on the second bevel gear, and the driving column penetrates through the driving port and extends out of the fixed seat;

[0035] The driving disc is fixedly arranged on the side wall of the driving column;

[0036] The limiting mechanism is arranged on the driving column and is used for limiting the angle between the driving column and the side wall of the driving port.

[0037] On the basis of the above scheme, the limiting mechanism includes:

[0038] The supporting groove is opened on the driving column;

[0039] The supporting column is slidably arranged in the supporting groove;

[0040] The limiting port is opened on the side wall of the supporting groove;

[0041] The limiting groove is opened on the side wall of the driving port, and the limiting groove penetrates through the side wall of the driving port far away from the third cavity;

[0042] The limiting block is fixedly arranged on the supporting column, and the limiting block penetrates through the limiting port and extends into the limiting groove.

[0043] On the basis of the above scheme, a hand wheel is fixedly arranged on the supporting column.

[0044] On the basis of the above scheme, a supporting spring is fixedly arranged between the supporting column and the bottom of the supporting groove.

[0045] On the basis of the above scheme, a heat dissipation port is opened on the side wall of the protection device body, and a filter screen is fixedly arranged in the heat dissipation port.

[0046] The working principle and beneficial effects of the present utility model are as follows:

[0047] 1. In the present utility model, through the arrangement of the positioning mechanism, it is convenient to control the rotation of the second gear through the operation of the driving mechanism. At the same time, through the meshing of the second gear and the second annular rack, the adjusting ring and the first annular rack are driven to rotate. Furthermore, through the meshing of the first annular rack and the first gear, the first gear is driven to rotate, so that the positioning block extends into the first positioning groove. Thus, the positioning of the fixing column can be realized through the cooperation of the positioning block and the first positioning groove, and then the installation of the protection device body can be realized;

[0048] 2. In the present utility model, through the arrangement of the driving mechanism, it is convenient to drive the driving column and the second bevel gear to rotate through the rotation of the driving disc. At the same time, the second gear is driven to rotate through the meshing of the second bevel gear and the first bevel gear;

[0049] 3. In the present utility model, through the arrangement of the limiting mechanism, after the positioning of the fixing column is completed, the operator can release the handwheel. Thus, under the action of the supporting spring, the supporting column is pulled to extend into the supporting groove, and then the limiting block is driven to extend into the limiting groove. Thus, the rotation angle of the driving column can be limited through the cooperation of the limiting block and the limiting groove, so as to prevent the fixing column from loosening from the fixing groove;

[0050] 4. In the present utility model, through the arrangement of the fixing seat, the protection device body, the fixing groove, the fixing column and the positioning mechanism, it is convenient to install and disassemble the protection device body by pulling the handwheel and rotating the driving disc, thus solving the problem of low disassembly and assembly efficiency of the anti-islanding protection device in the related technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0052] Figure 1 is a schematic structural diagram of the present utility model;

[0053] Figure 2 is a sectional structural diagram of the positioning mechanism of the present utility model;

[0054] Figure 3 is a sectional structural diagram of the driving mechanism of the present utility model;

[0055] Figure 4 is a sectional structural diagram of the limiting mechanism of the present utility model.

[0056] In the figure: 1, fixed seat; 2, protection device body; 3, fixing groove; 4, fixing column; 5, first positioning groove; 6, second positioning groove; 7, first gear; 8, positioning block; 9, adjusting ring; 10, second gear; 11, second annular rack; 12, third cavity; 13, first bevel gear; 14, second bevel gear; 15, driving column; 16, driving disc; 17, supporting groove; 18, supporting column; 19, limiting port; 20, limiting groove; 21, limiting block; 22, hand wheel; 23, supporting spring. Detailed implementation mode

[0057] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0058] As Figures 1 - 4 shown, this embodiment proposes a photovoltaic grid-connected anti-islanding protection device, including a fixed seat 1, a protection device body 2, a fixing groove 3, a fixing column 4 and a positioning mechanism. The protection device body 2 is arranged on one side of the fixed seat 1. A plurality of fixing grooves 3 are opened on the fixed seat 1. A plurality of fixing columns 4 are fixedly arranged on the protection device body 2. The fixing columns 4 can slide into the fixing grooves 3. The positioning mechanism is arranged in the fixed seat 1 and is used for positioning between the fixing columns 4 and the fixing grooves 3. A heat dissipation port is opened on the side wall of the protection device body 2, and a filter screen is fixedly arranged in the heat dissipation port.

[0059] Refer to Figure 1 With Figure 2, the positioning mechanism includes a first positioning groove 5, a second positioning groove 6, a first gear 7, a positioning block 8 and a synchronous rotation mechanism. The first positioning groove 5 is arranged in a ring shape and is opened on the side wall of the fixed column 4. A plurality of second positioning grooves 6 are opened on the side wall of the fixed groove 3. The first gear 7 is rotatably arranged in the second positioning groove 6. The positioning block 8 is fixedly arranged on the first gear 7. The synchronous rotation mechanism is arranged in the fixed seat 1 and is used to control the synchronous rotation of a plurality of first gears 7. The synchronous rotation mechanism includes a first cavity, an adjusting ring 9, a first annular rack and a synchronous rotation component. The first cavity is opened on the periphery of the fixed groove 3 and is communicated with the second positioning groove 6. The adjusting ring 9 is rotatably arranged in the first cavity. The first annular rack is fixedly arranged on the inner wall of the adjusting ring 9 and meshes with the first gear 7. The synchronous rotation component is arranged in the fixed seat 1 and is used to control the rotation of a plurality of adjusting rings 9. The synchronous rotation component includes a second cavity, a second gear 10, a second annular rack 11 and a driving mechanism. The second cavity is opened in the fixed seat 1 and is communicated with the first cavity. The second gear 10 is rotatably arranged in the second cavity. The second annular rack 11 is fixedly arranged on the outer wall of the adjusting ring 9 and meshes with the second gear 10. The driving mechanism is arranged in the fixed seat 1 and is used to control the rotation of the second gear 10.

[0060] Specifically, the operation of the driving mechanism can control the rotation of the second gear 10. At the same time, the meshing of the second gear 10 and the second annular rack 11 drives the adjusting ring 9 and the first annular rack to rotate. Furthermore, the meshing of the first annular rack and the first gear 7 drives the first gear 7 to rotate, so that the positioning block 8 extends into the first positioning groove 5. Thus, the positioning of the fixed column 4 can be realized through the cooperation of the positioning block 8 and the first positioning groove 5, and then the installation of the protection device body 2 can be realized.

[0061] Refer to Figure 3 And Figure 4 , the driving mechanism includes a third cavity 12, a first bevel gear 13, a second bevel gear 14 and a driving component. The third cavity 12 is opened on one side of the second cavity. The first bevel gear 13 is rotatably arranged on the inner wall of the third cavity 12. A connecting rod is fixedly arranged between the first bevel gear 13 and the second gear 10. The second bevel gear 14 is rotatably arranged on the inner wall of the third cavity 12 and meshes with the first bevel gear 13. The driving component is arranged on the fixed seat 1 and is used to control the rotation of the second bevel gear 14. The driving component includes a driving port, a driving column 15, a driving disc 16 and a limiting mechanism. The driving port is opened on the side wall of the third cavity 12. The driving column 15 is fixedly arranged on the second bevel gear 14. The driving column 15 penetrates through the driving port and extends out of the fixed seat 1. The driving disc 16 is fixedly arranged on the side wall of the driving column 15. The limiting mechanism is arranged on the driving column 15 and is used to limit the angle between the driving column 15 and the side wall of the driving port.

[0062] Specifically, the rotation of the driving disk 16 can drive the driving column 15 and the second bevel gear 14 to rotate. At the same time, the engagement of the second bevel gear 14 with the first bevel gear 13 drives the second gear 10 to rotate.

[0063] Refer to Figure 3 And Figure 4 , the limiting mechanism includes a support groove 17, a support column 18, a limiting port 19, a limiting groove 20 and a limiting block 21. The support groove 17 is formed on the driving column 15. The support column 18 is slidably arranged in the support groove 17. The limiting port 19 is formed on the side wall of the support groove 17. The limiting groove 20 is formed on the side wall of the driving port. The limiting groove 20 penetrates the side wall of the driving port away from the third cavity 12. The limiting block 21 is fixedly arranged on the support column 18. The limiting block 21 penetrates the limiting port 19 and extends into the limiting groove 20. A hand wheel 22 is fixedly arranged on the support column 18. A support spring 23 is fixedly arranged between the support column 18 and the bottom of the support groove 17.

[0064] Specifically, after the positioning of the fixing column 4 is completed, the operator can loosen the hand wheel 22, so that under the action of the support spring 23, the support column 18 is pulled to extend into the support groove 17, and then the limiting block 21 is driven to extend into the limiting groove 20, so that the rotation angle of the driving column 15 can be limited by the cooperation of the limiting block 21 and the limiting groove 20, thereby preventing the fixing column 4 from loosening from the fixing groove 3.

[0065] In this embodiment, during use, the operator inserts the fixing column 4 into the fixing groove 3, and then the operator pulls the hand wheel 22, so that the limiting block 21 is driven to disengage from the limiting groove 20 through the movement of the support column 18. After that, the operator rotates the driving disk 16. The rotation of the driving disk 16 can drive the driving column 15 and the second bevel gear 14 to rotate. At the same time, the engagement of the second bevel gear 14 with the first bevel gear 13 drives the second gear 10 to rotate. At the same time, the engagement of the second gear 10 with the second annular rack 11 drives the adjusting ring 9 and the first annular rack to rotate. Further, the engagement of the first annular rack with the first gear 7 drives the first gear 7 to rotate, so that the positioning block 8 extends into the first positioning groove 5, and thus the positioning of the fixing column 4 can be realized through the cooperation of the positioning block 8 and the first positioning groove 5, and further the installation of the protection device body 2 is realized. After the positioning of the fixing column 4 is completed, the operator can loosen the hand wheel 22, so that under the action of the support spring 23, the support column 18 is pulled to extend into the support groove 17, and then the limiting block 21 is driven to extend into the limiting groove 20, so that the rotation angle of the driving column 15 can be limited by the cooperation of the limiting block 21 and the limiting groove 20, thereby preventing the fixing column 4 from loosening from the fixing groove 3.

[0066] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A photovoltaic grid-connected anti-islanding protection device, characterized in that: include: Fixed seat (1); A protection device body (2), the protection device body (2) being arranged on one side of the fixing seat (1); A fixing groove (3), wherein a plurality of the fixing grooves (3) are provided on the fixing seat (1); A fixing column (4), wherein a plurality of the fixing columns (4) are fixedly arranged on the protection device body (2), and the fixing columns (4) can be slidably extended into the fixing groove (3); A positioning mechanism, the positioning mechanism is arranged in the fixing seat (1) and is used to position the fixing column (4) and the fixing groove (3).

2. A photovoltaic grid-connected anti-islanding protection device according to claim 1, characterized in that: The positioning mechanism comprises: A first positioning groove (5), the first positioning groove (5) is arranged in an annular shape, and the first positioning groove (5) is opened on the side wall of the fixing column (4); Second positioning grooves (6), a plurality of second positioning grooves (6) are formed on the side wall of the fixing groove (3); a first gear (7), the first gear (7) being rotatably disposed in the second positioning groove (6); a positioning block (8), the positioning block (8) being fixedly arranged on the first gear (7); A synchronous rotation mechanism, the synchronous rotation mechanism is arranged in the fixing seat (1) and is used to control the plurality of first gears (7) to rotate synchronously.

3. A photovoltaic grid-connected anti-islanding protection device according to claim 2, characterized in that: The synchronous rotation mechanism comprises: A first cavity, the first cavity being arranged on a peripheral side of the fixing groove (3), the first cavity being communicated with the second positioning groove (6); an adjusting ring (9), the adjusting ring (9) being rotatably disposed in the first cavity; a first annular rack, the first annular rack being fixedly arranged on the inner wall of the adjusting ring (9), the first annular rack being meshed with the first gear (7); A synchronous rotation component is arranged in the fixing seat (1) and is used to control the rotation of the plurality of adjustment rings (9).

4. A photovoltaic grid-connected anti-islanding protection device according to claim 3, characterized in that: The synchronous rotation assembly comprises: a second cavity, the second cavity being disposed in the fixing seat (1), the second cavity being communicated with the first cavity; a second gear (10), the second gear (10) being rotatably disposed in the second cavity; a second annular rack (11), the second annular rack (11) being fixedly arranged on the outer wall of the adjustment ring (9), the second annular rack (11) being meshed with the second gear (10); A driving mechanism, the driving mechanism is arranged in the fixing seat (1) and is used to control the second gear (10) to rotate.

5. A photovoltaic grid-connected anti-islanding protection device according to claim 4, characterized in that: The driving mechanism comprises: a third cavity (12), the third cavity (12) being opened on one side of the second cavity; a first bevel gear (13), the first bevel gear (13) being rotatably disposed on the inner wall of the third cavity (12), and a connecting rod being fixedly disposed between the first bevel gear (13) and the second gear (10); a second bevel gear (14), the second bevel gear (14) being rotatably disposed on the inner wall of the third cavity (12), the second bevel gear (14) being meshed with the first bevel gear (13); A drive assembly, the drive assembly being arranged on the fixing seat (1) and being used for controlling the second bevel gear (14) to rotate.

6. A photovoltaic grid-connected anti-islanding protection device according to claim 5, characterized in that: The drive assembly comprises: a drive port, the drive port being opened on a side wall of the third cavity (12); A driving column (15), the driving column (15) being fixedly disposed on the second bevel gear (14), the driving column (15) passing through the driving opening and extending out of the fixing seat (1); A driving disk (16), the driving disk (16) being fixedly arranged on a side wall of the driving column (15); A limiting mechanism, the limiting mechanism is arranged on the driving column (15) and is used to limit the angle between the driving column (15) and the side wall of the driving port.

7. A photovoltaic grid-connected anti-islanding protection device according to claim 6, characterized in that: The limiting mechanism comprises: A support groove (17), wherein the support groove (17) is formed on the driving column (15); A support column (18), the support column (18) being slidably disposed in the support groove (17); A limiting opening (19), wherein the limiting opening (19) is formed on a side wall of the supporting groove (17); a limiting groove (20), the limiting groove (20) being formed on a side wall of the driving opening, and the limiting groove (20) penetrating the side wall of the driving opening on a side away from the third cavity (12); A limit block (21), the limit block (21) being fixedly disposed on the support column (18), the limit block (21) penetrating the limit opening (19) and extending into the limit groove (20).

8. A photovoltaic grid-connected anti-islanding protection device according to claim 7, characterized in that: A hand wheel (22) is fixedly arranged on the support column (18).

9. A photovoltaic grid-connected anti-islanding protection device according to claim 8, characterized in that: A support spring (23) is fixedly arranged between the support column (18) and the bottom of the support groove (17).

10. A photovoltaic grid-connected anti-islanding protection device according to claim 9, characterized in that: A heat dissipation opening is provided on the side wall of the protective device body (2), and a filter is fixedly arranged in the heat dissipation opening.

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