CN211959072U

CN211959072U - Three-phase four-leg inverter for photovoltaic grid-connected power generation

Info

Publication number: CN211959072U
Application number: CN202020851764.2U
Authority: CN
Inventors: 李稳良; 胡江为
Original assignee: Feilai Electric Shanghai Co ltd
Current assignee: Feilai Electric Shanghai Co ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2020-11-17
Anticipated expiration: 2030-05-20

Abstract

The utility model belongs to the technical field of a three-phase four-leg inverter, in particular to a three-phase four-leg inverter for photovoltaic grid-connected power generation, which comprises an inverter body and a protective box, wherein the inverter body is positioned inside the protective box, the bottom inside the protective box is movably connected with a bearing plate, and two sides of the bearing plate are both fixedly connected with sliding blocks; this a four bridge arm dc-to-ac converters of three-phase for grid-connected PV electricity generation, fix the dc-to-ac converter body through threaded rod and movable block, make its installation more firm and convenient, then play the effect of buffering to the dc-to-ac converter body through accepting the board and buffering ball, make the dc-to-ac converter body cushion it when receiving the impact force, the damage that very big reduction it received, it is spacing to accepting the board through slider and spout this moment, avoid it to take place the skew at the in-process that reciprocates, thereby reached simple structure, use more convenient and the better purpose of protecting effect.

Description

Three-phase four-leg inverter for photovoltaic grid-connected power generation

Technical Field

The utility model belongs to the technical field of four bridge arm inverters of three-phase, concretely relates to four bridge arm inverters of three-phase for photovoltaic grid-connected power generation.

Background

The solar photovoltaic power generation depends on a solar cell module, the electronic characteristics of semiconductor materials are utilized to convert light energy into electric energy, a photovoltaic grid-connected power generation system is characterized in that the solar photovoltaic power generation system is connected with a conventional power grid and commonly undertakes a power supply task, when sunlight exists, an inverter inverts direct current generated by the photovoltaic system into sine alternating current, the generated alternating current can be directly supplied to an alternating current load, then the rest electric energy is input into the power grid, or all generated electric energy is directly merged into the power grid, and when the sunlight does not exist, the power consumption of the load is completely supplied by the power grid.

The inverter in the prior art is generally exposed on a workbench, foreign matters are easy to impact on the inverter due to negligence of workers and the like in the working process, and the inverter is damaged at the moment to cause certain potential safety hazard and economic loss, so that the three-phase four-bridge-arm inverter for photovoltaic grid-connected power generation is provided to solve the problems.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides a four bridge arm dc-to-ac converters of three-phase for grid-connected photovoltaic electricity generation possesses simple structure, uses more convenient and protective effect advantage such as better, and the dc-to-ac converter of having solved among the prior art is generally exposed to be placed on the workstation, and makes the foreign matter striking on the dc-to-ac converter easily because reasons such as staff negligence in the course of the work, at this moment will lead to the dc-to-ac converter to take place to damage, causes certain potential safety hazard and economic loss's problem.

In order to achieve the above object, the utility model provides a following technical scheme: the three-phase four-leg inverter for grid-connected photovoltaic power generation comprises an inverter body and a protective box, wherein the inverter body is positioned inside the protective box, the bottom inside the protective box is movably connected with a bearing plate, two sides of the bearing plate are fixedly connected with slide blocks, the inner wall of the protective box is provided with slide grooves corresponding to the slide blocks, the slide blocks are slidably connected inside the slide grooves, the inner bottom wall of the protective box is movably connected with a buffer ball, the top of the buffer ball is contacted with the bottom of the bearing plate, two sides of the top of the inverter body are fixedly connected with fixing rings, two sides of the top of the protective box are provided with thread grooves, the inner threads of the thread grooves are connected with threaded rods, the bottom ends of the threaded rods are positioned inside the protective box and are movably connected with movable blocks, the movable blocks are inserted inside the fixing rings, and the left side of the, the right side of the protection box is provided with a heat dissipation hole.

Preferably, the right side of protection incasement wall fixedly connected with protection pad, the left side of protection pad and the right side contact of inverter body.

Preferably, both sides of the bottom of the inverter body are fixedly connected with positioning blocks, the top of the bearing plate is provided with positioning grooves corresponding to the positioning blocks, and the positioning blocks are inserted into the positioning grooves.

Preferably, both sides of the bottom of the protection box are fixedly connected with non-slip mats, and the bottom of the movable block is fixedly connected with a cushion pad.

Preferably, the inner top of the protection box is provided with a limiting groove on the outer side of the threaded rod, and the limiting groove corresponds to the movable block.

Preferably, the top of the movable block is fixedly connected with a bearing, and the bottom end of the threaded rod is fixedly connected with an inner ring of the bearing.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses in, fix the dc-to-ac converter body through threaded rod and movable block, make its installation more firm and convenient, then play the effect of buffering to the dc-to-ac converter body through accepting board and buffering ball, make the dc-to-ac converter body cushion it when receiving the impact force, the damage that it received of very big reduction, it is spacing to accepting the board through slider and spout this moment, avoid it to take place the skew at the in-process that reciprocates, thereby reached simple structure, use more convenient and the better purpose of protecting effect.

The utility model discloses in, protect and spacing inverter body through the protection pad, avoid the inner wall bump of its right side and protective housing, cause its damage, fix a position inverter body through locating piece and constant head tank, make its installation more convenient and firm, make the installation of protective housing more firm through the slipmat, then further cushion inverter body through the blotter, make its protecting effect better, carry out spacingly to the movable block through the spacing groove, avoid its inside that hinders inverter body and get into the protective housing, carry on spacingly to the movable block through the bearing, avoid it to follow the threaded rod and rotate, influence the installation effectiveness.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a perspective view of the protection box of the present invention;

FIG. 2 is a front sectional view of the connection between the protection box and the inverter body;

FIG. 3 is a side view of the connection between the protection box and the inverter body;

fig. 4 is a front cross-sectional view of the protective box connected with the threaded rod.

In the figure: 1. a protective box; 2. a threaded rod; 3. heat dissipation holes; 4. an inverter body; 5. a fixing ring; 6. a protective pad; 7. a slider; 8. a chute; 9. a through hole; 10. positioning a groove; 11. positioning blocks; 12. a bearing plate; 13. a buffer ball; 14. a limiting groove; 15. a bearing; 16. a movable block; 17. a cushion pad; 18. a thread groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides the following technical solutions: a three-phase four-leg inverter for photovoltaic grid-connected power generation comprises an inverter body 4 and a protective box 1, wherein the inverter body 4 is positioned inside the protective box 1, the bottom inside the protective box 1 is movably connected with a bearing plate 12, two sides of the bearing plate 12 are both fixedly connected with sliding blocks 7, the inner wall of the protective box 1 is provided with sliding grooves 8 corresponding to the sliding blocks 7, the sliding blocks 7 are slidably connected inside the sliding grooves 8, the inner bottom wall of the protective box 1 is movably connected with buffer balls 13, the tops of the buffer balls 13 are in contact with the bottom of the bearing plate 12, two sides of the top of the inverter body 4 are both fixedly connected with fixing rings 5, two sides of the top of the protective box 1 are both provided with thread grooves 18, the inner threads of the thread grooves 18 are connected with threaded rods 2, the bottom ends of the threaded rods 2 are positioned inside the protective box 1 and movably connected with movable blocks 16, the movable blocks 16 are inserted, louvre 3 has been seted up on the right side of protective housing 1, when using, pass through-hole 9 with inverter body 4 and place the inside at protective housing 1, then rotate threaded rod 2, drive movable block 16 downstream through threaded rod 2, make it peg graft in the inside of solid fixed ring 5, fix inverter body 4 through threaded rod 2 and movable block 16 this moment, make its installation more firm and convenient, then play the effect of buffering through accepting board 12 and cushion ball 13 to inverter body 4, make inverter body 4 cushion it when receiving the impact force, the very big damage that reduces it and receive, it is spacing to accepting board 12 through slider 7 and spout 8 this moment, avoid it to take place the skew at the in-process that reciprocates, thereby reached simple structure, use more convenient and the better purpose of protecting effect.

Referring to fig. 2, the right side of the inner wall of the protection box 1 is fixedly connected with a protection pad 6, the left side of the protection pad 6 contacts with the right side of the inverter body 4, the inverter body 4 is protected and limited by the protection pad 6, and the right side of the protection pad is prevented from colliding with the inner wall of the protection box 1 to cause damage to the protection pad.

Referring to fig. 2, the two sides of the bottom of the inverter body 4 are fixedly connected with positioning blocks 11, the top of the bearing plate 12 is provided with positioning grooves 10 corresponding to the positioning blocks 11, the positioning blocks 11 are inserted into the positioning grooves 10, and the inverter body 4 is positioned by the positioning blocks 11 and the positioning grooves 10, so that the inverter body is more convenient and stable to install.

Referring to fig. 2 and 4, both sides of the bottom of the protection box 1 are fixedly connected with anti-slip pads, and the bottom of the movable block 16 is fixedly connected with a cushion pad 17, so that the protection box 1 is more stably installed through the anti-slip pads, and then the inverter body 4 is further buffered through the cushion pad 17, so that the protection effect is better.

Referring to fig. 2 and 4, a limiting groove 14 is formed in the inner top of the protective box 1 and located on the outer side of the threaded rod 2, the limiting groove 14 corresponds to the movable block 16, and the movable block 16 is limited by the limiting groove 14, so that the inverter body 4 is prevented from entering the protective box 1.

Referring to fig. 2 and 4, the top of the movable block 16 is fixedly connected with a bearing 15, the bottom end of the threaded rod 2 is fixedly connected with the inner ring of the bearing 15, and the movable block 16 is limited by the bearing 15, so that the movable block is prevented from rotating along with the threaded rod 2 and affecting the installation efficiency.

The utility model discloses a theory of operation and use flow: pass through-hole 9 with inverter body 4 and place the inside at protective housing 1, then rotate threaded rod 2, drive movable block 16 downstream through threaded rod 2, make its grafting in the inside of solid fixed ring 5, fix inverter body 4 through threaded rod 2 and movable block 16 this moment, it is more firm and convenient to make its installation, then play the effect of buffering to inverter body 4 through accepting board 12 and cushion ball 13, make inverter body 4 cushion it when receiving the impact force, the damage that very big reduction it received, it is spacing to accepting board 12 through slider 7 and spout 8 this moment, avoid it to take place the skew at the in-process that reciprocates, thereby reached simple structure, use more convenient and the better purpose of protecting effect.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A four bridge arm inverters of three-phase for grid-connected PV electricity generation, including inverter body (4) and protective housing (1), its characterized in that: the inverter body (4) is positioned inside the protective box (1), the bottom of the interior of the protective box (1) is movably connected with a bearing plate (12), the two sides of the bearing plate (12) are fixedly connected with sliding blocks (7), the inner wall of the protective box (1) is provided with sliding grooves (8) corresponding to the sliding blocks (7), the sliding blocks (7) are connected inside the sliding grooves (8) in a sliding manner, the inner bottom wall of the protective box (1) is movably connected with buffer balls (13), the top of the buffer balls (13) is contacted with the bottom of the bearing plate (12), the two sides of the top of the inverter body (4) are fixedly connected with fixing rings (5), the two sides of the top of the protective box (1) are respectively provided with threaded grooves (18), the interior of the threaded grooves (18) is connected with threaded rods (2), the bottom end of the threaded rods (2) is positioned inside the protective box (1) and is movably connected with movable blocks (16), the movable block (16) is inserted into the fixed ring (5), the through hole (9) is formed in the left side of the protective box (1), and the heat dissipation hole (3) is formed in the right side of the protective box (1).

2. The three-phase four-leg inverter for grid-connected photovoltaic power generation according to claim 1, wherein: the right side fixedly connected with protection pad (6) of protective housing (1) inner wall, the left side of protection pad (6) contacts with the right side of dc-to-ac converter body (4).

3. The three-phase four-leg inverter for grid-connected photovoltaic power generation according to claim 1, wherein: the inverter is characterized in that positioning blocks (11) are fixedly connected to two sides of the bottom of the inverter body (4), positioning grooves (10) corresponding to the positioning blocks (11) are formed in the top of the bearing plate (12), and the positioning blocks (11) are inserted into the positioning grooves (10).

4. The three-phase four-leg inverter for grid-connected photovoltaic power generation according to claim 1, wherein: the protection box is characterized in that anti-slip pads are fixedly connected to two sides of the bottom of the protection box (1), and cushion pads (17) are fixedly connected to the bottom of the movable blocks (16).

5. The three-phase four-leg inverter for grid-connected photovoltaic power generation according to claim 1, wherein: the protection box is characterized in that a limiting groove (14) is formed in the inner top of the protection box (1) and located on the outer side of the threaded rod (2), and the limiting groove (14) corresponds to the movable block (16).

6. The three-phase four-leg inverter for grid-connected photovoltaic power generation according to claim 1, wherein: the top fixedly connected with bearing (15) of movable block (16), the bottom of threaded rod (2) and the inner circle fixed connection of bearing (15).