An arc-proof safety photovoltaic transformer

Abstract

The application discloses an arc-proof safe photovoltaic transformer, which comprises a transformer body, a terminal post installed on the transformer body, an iron core installed in the transformer body, a winding arranged on the iron core, and an arc-proof mechanism arranged between the winding and the terminal post. The arc-proof mechanism comprises a protective shell, two groups of telescopic rods fixedly connected inside the protective shell, and movable conductive blocks fixedly connected to the ends of the two groups of telescopic rods. When the transformer body generates arc, a large amount of gas is generated in the transformer body. The gas enters the connecting gas pipe through the air inlet pipe, and then is filled into the plurality of telescopic gas pipes through the connecting gas pipe. After the telescopic gas pipes are ventilated, the telescopic gas pipes are elongated to push the insulating seat to move. The movement of the insulating seat drives the two movable conductive blocks to separate and disconnect, so that the connection between the winding and the terminal post can be disconnected, the arc-proof effect is good, and the safety is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic transformers, in particular to an arc-proof safety photovoltaic transformer. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, secondary coil and iron core (magnetic core). Transformers are basic equipment for power transmission and distribution and are widely used in industries such as industry, agriculture, transportation, and urban communities. Transformers are required for power transmission and distribution in photovoltaic systems.

[0003] In the prior art, application number CN202120959600.6 discloses a high-stability photovoltaic transformer with good heat dissipation performance. It uses a first heat dissipation mechanism and a second heat dissipation mechanism to perform heat dissipation work simultaneously to ensure good heat dissipation effect. However, during use, electric arcs are easily generated inside the transformer, and the safety is not ideal. Summary of the Invention

[0004] The object of the present invention is to provide an arc-proof safety photovoltaic transformer to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an arc-proof safety photovoltaic transformer, comprising a transformer body, a terminal mounted on the transformer body, an iron core mounted inside the transformer body, a winding disposed on the iron core, and an arc-proof mechanism disposed between the winding and the terminal;

[0006] The arc protection mechanism includes a protective shell, two groups of telescopic rods are fixedly connected to the inside of the protective shell, the ends of the two groups of telescopic rods are fixedly connected to movable conductive blocks, a reset spring is provided on the telescopic rod, the opposite side surfaces of the two movable conductive blocks are fixedly connected to insulating seats, a telescopic air pipe is fixedly connected to the insulating seat, a connecting air pipe is fixedly connected between the multiple telescopic air pipes, one end of the connecting air pipe is connected to an air inlet pipe, a one-way valve is installed inside the air inlet pipe, the end of the connecting air pipe away from the air inlet pipe is fixedly connected to an air release pipe, and a sealing cover is threadedly connected to the air release pipe.

[0007] As a further preferred embodiment of the present technical solution, the terminal is connected to one of the movable conductive blocks, and the winding is connected to another movable conductive block.

[0008] As a further preferred embodiment of the present technical solution, the insulating seats on the two movable conductive blocks are connected via a telescopic air pipe, and the multiple telescopic air pipes are connected via a connecting air pipe.

[0009] As a further preferred embodiment of the present technical solution, one end of the air inlet pipe is connected to the interior of the transformer body, and the air discharge pipe passes through the protective shell and is connected to the outside.

[0010] As a further preferred embodiment of the present technical solution, the protective shell is made of an insulating material, a mounting base is fixedly connected to the protective shell, and a mounting bolt is provided on the mounting base.

[0011] As a further preferred embodiment of the present technical solution, both the connecting air pipe and the air intake pipe are provided with threaded joints, and the connecting air pipe and the air intake pipe are connected via the threaded joints.

[0012] As a further preferred embodiment of the present technical solution, a plurality of heat dissipation fins are fixedly connected to the surface of the transformer body, a heat dissipation frame is fixedly mounted on the ends of the plurality of heat dissipation fins, and a heat dissipation fan is installed inside the heat dissipation frame.

[0013] The present invention provides an arc-proof photovoltaic transformer with the following advantages:

[0014] (1) The present invention provides an arc protection mechanism. When an arc occurs in the transformer body, a large amount of gas is generated inside the transformer body. The gas enters the connecting air pipe through the air inlet pipe and is then inflated into multiple telescopic air pipes through the connecting air pipe. After the telescopic air pipe is ventilated, it extends and pushes the insulating seat to move. The movement of the insulating seat drives the two movable conductive blocks to separate and disconnect, thereby disconnecting the connection between the winding and the terminal, playing a good arc protection role and effectively improving safety.

[0015] (2) The present invention provides heat dissipation fins, and the protective housing can be easily disassembled and installed through the mounting base, which is convenient for maintenance. The multiple heat dissipation fins have a good heat dissipation effect on the transformer body, and the heat dissipation fan is used to promote the air flow around the heat dissipation fins, effectively improving the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 Schematic diagram of the internal structure of the present invention;

[0018] Figure 3 For the present invention Figure 2 A magnified view of the structure at center A;

[0019] Figure 4 For the present invention Figure 2 A magnified view of the structure at point B in the middle;

[0020] In the figure: 1. Transformer body; 2. Terminals; 3. Winding; 4. Iron core; 5. Arc protection mechanism; 6. Protective shell; 7. Telescopic rod; 8. Movable conductive block; 9. Reset spring; 10. Insulation seat; 11. Telescopic air pipe; 12. Connecting air pipe; 13. Inlet pipe; 14. One-way valve; 15. Exhaust pipe; 16. Sealing cover; 17. Mounting seat; 18. Mounting bolts; 19. Threaded joint; 20. Heat sink fin; 21. Heat sink rack. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] The present invention provides a technical solution: Figure 2 As shown, in this embodiment, an arc-proof safety photovoltaic transformer includes a transformer body 1, a terminal 2 is installed on the transformer body 1, an iron core 4 is installed inside the transformer body 1, a winding 3 is provided on the iron core 4, and an arc-proof mechanism 5 is provided between the winding 3 and the terminal 2. When an arc occurs, a large amount of gas is generated inside, and the gas enters the arc-proof mechanism 5. The arc-proof mechanism 5 is triggered to disconnect the connection between the terminal 2 and the winding 3, thereby playing a good arc-proof role and effectively improving safety.

[0023] like Figure 2 and Figure 3As shown, the arc protection mechanism 5 includes a protective shell 6, two groups of telescopic rods 7 are fixedly connected inside the protective shell 6, and the ends of the two groups of telescopic rods 7 are fixedly connected with movable conductive blocks 8, the terminal 2 is connected to one of the movable conductive blocks 8, and the winding 3 is connected to the other movable conductive block 8. A reset spring 9 is sleeved on the telescopic rod 7, which can make the two movable conductive blocks 8 fit tightly together, so that they can play a good conductive role. The opposite side surfaces of the two movable conductive blocks 8 are fixedly connected with an insulating seat 10, which can play a good insulating role. A telescopic air pipe 11 is fixedly connected to the insulating seat 10, and a connecting air pipe 12 is fixedly connected between the multiple telescopic air pipes 11. The insulating seats 10 on the two movable conductive blocks 8 are connected through the telescopic air pipe 11, and the multiple telescopic air pipes 11 are connected through the connecting air pipe 12. One end of the connecting air pipe 12 is connected The air inlet pipe 13 is provided with a one-way valve 14 inside the air inlet pipe 13, so that the gas can enter the air inlet pipe 13 without backflowing, and the gas containing dust enters the interior of the transformer body 1. The end of the connecting air pipe 12 away from the air inlet pipe 13 is fixedly connected to the exhaust pipe 15. One end of the air inlet pipe 13 is connected to the interior of the transformer body 1, and the exhaust pipe 15 passes through the protective shell 6 and is connected to the outside. A sealing cover 16 is threadedly connected to the exhaust pipe 15. When an arc occurs in the transformer body 1, a large amount of gas is generated inside the transformer body 1. The gas enters the connecting air pipe 12 from the air inlet pipe 13, and then is inflated into the multiple telescopic air pipes 11 through the connecting air pipe 12. After ventilation, the telescopic air pipe 11 extends to push the insulating seat 10 to move. The movement of the insulating seat 10 drives the two movable conductive blocks 8 to separate and disconnect, thereby disconnecting the connection between the winding 3 and the terminal 2, playing a good anti-arc role and effectively improving safety.

[0024] like Figure 4 As shown, the protective shell 6 is made of insulating material, which can effectively prevent leakage and provide good protection for the internal movable conductive block 8. A mounting seat 17 is fixedly connected to the protective shell 6, and a mounting bolt 18 is provided on the mounting seat 17, which can facilitate the disassembly and installation of the protective shell 6 and facilitate maintenance. The connecting air pipe 12 and the air intake pipe 13 are both provided with a threaded joint 19, and the connecting air pipe 12 and the air intake pipe 13 are connected by a threaded joint 19, which can facilitate the connection and removal of the connecting air pipe 12 and the air intake pipe 13.

[0025] like Figure 1 As shown, a plurality of heat dissipation fins 20 are fixedly connected to the surface of the transformer body 1, and a heat dissipation frame 21 is fixedly installed at the ends of the plurality of heat dissipation fins 20. A heat dissipation fan is installed inside the heat dissipation frame 21. The plurality of heat dissipation fins 20 can be used to effectively dissipate heat for the transformer body 1, and the heat dissipation fan is used to promote the air flow around the heat dissipation fins 20, thereby effectively improving the heat dissipation effect.

[0026] The present invention provides an arc-proof safety photovoltaic transformer, the specific working principle of which is as follows:

[0027] When the present invention is actually used, an arc occurs inside the transformer body 1, and a large amount of gas is generated therein. The gas enters the connecting air pipe 12 through the air inlet pipe 13, and is then inflated into the multiple telescopic air pipes 11 through the connecting air pipe 12. After ventilation, the telescopic air pipes 11 extend to push the insulating seat 10 to move. The movement of the insulating seat 10 drives the two movable conductive blocks 8 to separate and disconnect, thereby disconnecting the connection between the winding 3 and the terminal 2, playing a good arc prevention role and effectively improving safety. After maintenance, the sealing cover 16 can be opened to release the gas, and the movable conductive block 8 can be reconnected to form a passage using the reset spring 9.

[0028] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An arc-proof photovoltaic transformer, comprising a transformer body (1), characterized in that: A terminal (2) is mounted on the transformer body (1), an iron core (4) is mounted inside the transformer body (1), a winding (3) is mounted on the iron core (4), and an arc protection mechanism (5) is provided between the winding (3) and the terminal (2); The arc protection mechanism (5) comprises a protective shell (6), two groups of telescopic rods (7) are fixedly connected inside the protective shell (6), the ends of the two groups of telescopic rods (7) are fixedly connected to movable conductive blocks (8), the telescopic rods (7) are sleeved with reset springs (9), the surfaces of the two movable conductive blocks (8) on opposite sides are fixedly connected to insulating seats (10), the insulating seats (10) are fixedly connected to telescopic air pipes (11), a connecting air pipe (12) is fixedly connected between the multiple telescopic air pipes (11), one end of the connecting air pipe (12) is connected to an air inlet pipe (13), a one-way valve (14) is installed inside the air inlet pipe (13), the end of the connecting air pipe (12) away from the air inlet pipe (13) is fixedly connected to an air release pipe (15), and a sealing cover (16) is threadedly connected to the air release pipe (15); the terminal (2) is connected to one of the movable conductive blocks (8), and the winding (3) is connected to the other movable conductive block (8) ) are connected, a return spring (9) is sleeved on the telescopic rod (7), so that the two movable conductive blocks (8) are tightly fitted, and the insulating seats (10) on the two movable conductive blocks (8) are connected through a telescopic air pipe (11), and a plurality of the telescopic air pipes (11) are connected through a connecting air pipe (12). One end of the air inlet pipe (13) is connected to the inside of the transformer body (1), and the air discharge pipe (15) passes through the protective shell (6) and is connected to the outside. 5) The upper threaded connection is provided with a sealing cover (16). When an arc occurs in the transformer body (1), a large amount of gas is generated inside. The gas enters the connecting gas pipe (12) through the gas inlet pipe (13), and then is inflated into the multiple telescopic gas pipes (11) through the connecting gas pipe (12). After the telescopic gas pipes (11) are ventilated, they extend and push the insulating seat (10) to move. The movement of the insulating seat (10) drives the two movable conductive blocks (8) to separate and disconnect, thereby disconnecting the connection between the winding (3) and the terminal (2).

2. The arc-proof photovoltaic transformer according to claim 1, characterized in that: The protective shell (6) is made of insulating material, a mounting seat (17) is fixedly connected to the protective shell (6), and a mounting bolt (18) is provided on the mounting seat (17).

3. The arc-proof photovoltaic transformer according to claim 1, characterized in that: The connecting air pipe (12) and the air intake pipe (13) are both provided with a threaded joint (19), and the connecting air pipe (12) and the air intake pipe (13) are connected via the threaded joint (19).

4. The arc-proof photovoltaic transformer according to claim 1, characterized in that: A plurality of heat dissipation fins (20) are fixedly connected to the surface of the transformer body (1), a heat dissipation frame (21) is fixedly mounted on the ends of the plurality of heat dissipation fins (20), and a heat dissipation fan is mounted inside the heat dissipation frame (21).

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