CN108010696B

CN108010696B - Single-phase transformer for photovoltaic

Info

Publication number: CN108010696B
Application number: CN201711297686.5A
Authority: CN
Inventors: 方泽波; 朱燕艳
Original assignee: Shaoxing Huirong Zhenhe New Energy Technology Co ltd
Current assignee: HEBEI JETER ELECTRIC CO.,LTD.
Priority date: 2017-12-08
Filing date: 2017-12-08
Publication date: 2021-03-16
Anticipated expiration: 2037-12-08
Also published as: CN108010696A

Abstract

The invention discloses a photovoltaic single-phase transformer which comprises a transformer body, a transformer cover, a cooling device, a buffering device, a positioning device, support legs, a cushion pad, an iron core, a coil, a guide groove, a guide block, fixing frames and a first spring. This single-phase transformer for photovoltaic through being provided with heat sink, dashes into heat transfer oil in ware body and oil tank, makes heat transfer oil form the circulation between oil tank and ware body through the immersible pump, and the heat on the coil is taken away to the in-process of heat transfer oil circulation, and heat dissipation is generated in oil tank and communicating pipe, can effectually take away the heat that the coil during operation produced, reduces the influence of heat to transformer work, has solved the transformer heat and has piled up the problem that can make the transformer appear damaging.

Description

Single-phase transformer for photovoltaic

Technical Field

The invention relates to the technical field of transformers, in particular to a photovoltaic single-phase transformer.

Background

The transformer is a device for changing alternating voltage by utilizing the principle of electromagnetic induction, and main components are a primary coil, a secondary coil and an iron core. In electrical equipment and wireless circuits, the high-voltage power supply is commonly used for voltage lifting, impedance matching, safety isolation and the like. The transformer mainly has the following functions: voltage transformation; current transformation, impedance transformation; isolating; voltage regulation (magnetic saturation transformers); an autotransformer; high-voltage transformers (dry and oil-immersed) and the like, wherein the shapes of iron cores commonly used by the transformers generally comprise E-type and C-type iron cores, XED type and ED type CD type.

The photovoltaic is a short-term solar photovoltaic power generation system, which is a novel power generation system for directly converting solar radiation energy into electric energy by utilizing the photovoltaic effect of a solar cell semiconductor material, and has two modes of independent operation and grid-connected operation, and meanwhile, the solar photovoltaic power generation systems are classified, namely, a centralized type, such as a large northwest ground photovoltaic power generation system; one is distributed (with >6MW as boundary), such as factory building roof photovoltaic power generation system of industry and commerce, resident house roof photovoltaic power generation system.

The electric energy that photovoltaic system produced need utilize the transformer to increase voltage before long-distance transport, through the loss that produces when improving voltage reduction electric energy transport, but current single-phase transformer has following problem to be solved:

(1) because the photovoltaic system is usually erected in a place where solar energy is sufficient, and the sunshine time is longer than that of other places, the temperature is relatively higher, so that the heat dissipation of the transformer becomes more difficult, and the transformer can be burnt out due to excessive heat accumulation.

(2) The existing transformer is not provided with a device for buffering vibration or impact, the coil installation is carried out or the transformer cannot be well buffered when being affected by external vibration, a transformer device is easy to damage, and improvement is urgently needed.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a photovoltaic single-phase transformer, which solves the problems in the background art.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a photovoltaic single-phase transformer comprises a transformer body, a transformer cover, a cooling device, a buffering device, a positioning device, supporting legs, buffering cushions, an iron core, a coil, guide grooves, guide blocks, fixing frames and a first spring, wherein the supporting legs are fixedly arranged on the lower surface of the cooling device, the buffering cushions are bonded to the bottom ends of the supporting legs, the bottom ends of the transformer cover are in contact with the open end of the transformer body, the bottom ends of the outer side surface of the transformer cover and the top ends of the outer side surface of the transformer body are respectively and fixedly connected with the inner side surfaces of the two fixing frames, the two fixing frames are fixedly connected through bolts, the lower surface of the transformer body is fixedly connected with the upper surface of the cooling device, the left side wall and the right side wall inside the transformer body are respectively provided with the guide grooves, the guide blocks are respectively and slidably, two the right and left sides of a side that the guide block is relative fixedly connected with buffer respectively, buffer's inside is provided with the iron core, the outside winding of iron core has the coil, the interior diapire fixed mounting of lid has positioner, positioner's lower surface and the upper surface contact of iron core.

Preferably, the cooling device comprises an oil tank, a communicating pipe and a submersible pump, the upper surface of the oil tank is fixedly connected with the lower surface of the device body, the lower surface of the oil tank is fixedly connected with a supporting leg, the submersible pump is fixedly arranged on the inner bottom wall of the oil tank, the oil inlet end of the submersible pump sequentially penetrates through the top wall of the oil tank and the bottom wall of the device body and is communicated with the inside of the device body, the left side wall and the right side wall of the oil tank are respectively fixedly communicated with the oil inlet ends of two communicating pipes, the oil outlet ends of the two communicating pipes respectively penetrate through the top ends of the left side wall and the right side wall of the device body and are communicated with the inside of the device body, in the specific work process, heat exchange oil is filled in the device body and the oil tank, the heat exchange oil is circulated between the oil tank and the device body, the influence of heat on the operation of the transformer is reduced.

Preferably, the buffer device comprises two vertical plates, a transverse plate, positioning grooves, positioning blocks and a limiting groove, wherein the opposite side surfaces of the two guide blocks are fixedly connected with the bottom ends of the outer side surfaces of the two vertical plates respectively, the bottom ends of the inner side surfaces of the two vertical plates are fixedly connected with the left side surface and the right side surface of the transverse plate respectively, the positioning grooves are formed in the upper surface of the transverse plate, the iron core and the coil are inserted into the positioning grooves, the positioning grooves extending from top to bottom are formed in the inner side surfaces of the two vertical plates, the top ends of the positioning grooves are open, the positioning blocks are slidably connected into the positioning grooves, the two positioning blocks extend out of the opposite ends of the two positioning blocks and are fixedly connected with the left side surface and the right side surface of the iron core respectively, when the buffer device works, the cover is opened to, the first spring is compressed, the falling of the iron core is buffered, and when the transformer is vibrated, the first spring and the second spring in the positioning device are matched to buffer the vibration and impact force of the iron core and the coil, so that the iron core and the coil are prevented from being damaged.

Preferably, the positioning device comprises a pressing plate, two fixing columns, a spring groove, a second spring and two inserting columns, wherein the lower surface of the pressing plate is contacted with the top end of the iron core, the left side and the right side of the upper surface of the pressing plate are fixedly connected with the fixing columns, the top ends of the two fixing columns are respectively provided with the spring groove, the bottom walls of the two spring grooves are respectively fixedly connected with the second spring, the top end of the second spring is fixedly connected with the bottom ends of the inserting columns inserted in the spring grooves, the top ends of the two inserting columns respectively penetrate through the two spring grooves and are fixedly connected with the inner bottom wall of the cover, when the device is in specific work, the cover is covered on the top of the device body, the pressing plate is contacted with the top end of the iron core to press the iron core, the second spring compresses the iron core, the second spring buffers impact when the transformer is impacted and vibrated, and the, avoiding excessive bounce.

Preferably, the first spring and the second spring are both compression springs, the first spring and the second spring are both in a compression state, the lower surface of the transverse plate is higher than the bottom ends of the two vertical plates, and the lower surface of the transverse plate is higher than the bottom ends of the vertical plates, so that the submersible pump cannot influence the heat exchange oil filling device body filled with the heat exchange oil.

Preferably, the seal groove has been seted up on the top of ware body, the position fixedly connected with seal frame of the corresponding seal groove in lid bottom, the inside at the seal groove is pegged graft to the seal frame, the seal frame is the rubber frame, and the seal frame is pegged graft and can be improved the lid and the sealed of ware body junction in the seal groove, avoids trading hot oil and reveals in the ware body.

(III) advantageous effects

The invention provides a photovoltaic single-phase transformer, which has the following beneficial effects:

(1) this single-phase transformer for photovoltaic through being provided with heat sink, dashes into heat transfer oil in the ware body and oil tank, makes heat transfer oil form the circulation between oil tank and the ware body through the immersible pump, and the heat on the coil is taken away to the in-process of heat transfer oil circulation, and heat dissipation is generated in oil tank and communicating pipe, can effectually take away the heat that the coil during operation produced, reduces the influence of heat to transformer work, has solved transformer heat and has piled up the problem that can make the transformer appear damaging.

(2) This single-phase transformer for photovoltaic, through being provided with buffer, utilize the sliding connection of locating piece and constant head tank, can be for the installation location of iron core, through first spring swing joint between the lower lateral wall of guide block and guide way, the impact force of the production of tenesmus when can utilizing the elasticity buffering iron core installation of first spring, avoid iron core and coil to receive the damage, and after the installation is accomplished, second spring in the cooperation first spring cooperation positioner can provide the shock attenuation for iron core and coil, reduce the damage that comes from vibrations that iron core and coil received, the problem of proposing in the background art has been solved.

(3) This single-phase transformer for photovoltaic through being provided with positioner, and the iron core is pushed down in the top contact of clamp plate and iron core, and the second spring compression utilizes the elasticity of second spring to push down the iron core, and the second spring buffering when the transformer receives impact and vibrations strikes to utilize the pressure help iron core location of second spring, avoid its excessive bounce.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic structural view of a cooling device according to the present invention;

FIG. 4 is a schematic structural diagram of a buffering device according to the present invention;

FIG. 5 is a schematic structural diagram of the positioning device of the present invention.

In the figure: the device comprises a device body 1, a device cover 2, a temperature reducing device 3, an oil tank 301, a communication pipe 302, a submersible pump 303, a buffer device 4, a vertical plate 401, a transverse plate 402, a positioning groove 403, a positioning block 404, a limiting groove 405, a positioning device 5, a pressing plate 501, a fixed column 502, a spring groove 503, a second spring 504, an insertion column 505, a support leg 6, a cushion pad 7, an iron core 8, a coil 9, a guide groove 10, a guide block 11, a fixed frame 12, a first spring 13, a seal groove 14 and a seal frame 15.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a photovoltaic single-phase transformer comprises a transformer body 1, a cover 2, a cooling device 3, a buffer device 4, a positioning device 5, a support leg 6, a cushion pad 7, an iron core 8, a coil 9, a guide groove 10, a guide block 11, a fixing frame 12 and a first spring 13, wherein the support leg 6 is fixedly arranged on the lower surface of the cooling device 3, the cushion pad 7 is bonded at the bottom end of the support leg 6, the bottom end of the cover 2 is contacted with the opening end of the transformer body 1, the bottom end of the outer side surface of the cover 2 and the top end of the outer side surface of the transformer body 1 are respectively and fixedly connected with the inner side surfaces of the two fixing frames 12, the two fixing frames 12 are fixedly connected through bolts, the lower surface of the transformer body 1 is fixedly connected with the upper surface of the cooling device 3, the left side wall and the right side wall of the inner part of the transformer body 1 are respectively provided with the guide groove, the opposite side surfaces of the two guide blocks 11 are respectively fixedly connected with the left side surface and the right side surface of the buffer device 4, an iron core 8 is arranged in the buffer device 4, a coil 9 is wound outside the iron core 8, a positioning device 5 is fixedly arranged on the inner bottom wall of the cover 2, the lower surface of the positioning device 5 is contacted with the upper surface of the iron core 8, the temperature reduction device 3 comprises an oil tank 301, a communication pipe 302 and a submersible pump 303, the upper surface of the oil tank 301 is fixedly connected with the lower surface of the device body 1, the lower surface of the oil tank 301 is fixedly connected with a supporting leg 6, the inner bottom wall of the oil tank 301 is fixedly provided with the submersible pump 303, the oil inlet end of the submersible pump 303 sequentially penetrates through the top wall of the oil tank 301 and the bottom wall of the device body 1 and is communicated with the inside of the device body 1, the left side wall and the right side wall of, when the transformer works, heat exchange oil is filled in the device body 1 and the oil tank 301, the heat exchange oil is circulated between the oil tank 301 and the device body 1 through the submersible pump 303, heat on the coil 9 is taken away in the process of heat exchange oil circulation, the heat is dissipated in the oil tank 301 and the communicating pipe 302, the heat generated in the working process of the coil 9 can be effectively taken away, and the influence of the heat on the working of the transformer is reduced, the buffer device 4 comprises two vertical plates 401, a transverse plate 402, positioning grooves 403, positioning blocks 404 and limiting grooves 405, the bottom ends of the outer side surfaces of the two vertical plates 401 are respectively and fixedly connected with the bottom ends of the outer side surfaces of the two vertical plates 11, the left side surface and the right side surface of the transverse plate 402 are respectively and fixedly connected with the upper surface of the transverse plate 402, the iron core 8 and the coil 9 are inserted in the positioning grooves, the top end of the positioning groove 403 is open, the positioning block 404 is connected inside the positioning groove 403 in a sliding manner, one end of each of the two positioning blocks 404 opposite to each other extends out of the two positioning grooves 403 and is fixedly connected with the left side and the right side of the iron core 8, when the transformer is in operation, the cover 2 is opened to place the iron core 8 and the coil 9 into the transformer body 1, the two positioning blocks 404 are inserted into the two positioning grooves 403, the bottom end of the iron core 8 is contacted with the bottom wall of the limiting groove 405, the first spring 13 is compressed, the falling of the iron core 8 is buffered, when the transformer is vibrated, the first spring 13 and the second spring 504 in the positioning device 5 are matched to provide the buffer of vibration and impact force for the iron core 8 and the coil 9, the iron core 8 and the coil 9 are prevented from being damaged, the positioning device 5 comprises a pressing plate 501, two fixing columns 502, a spring groove 503, a, the left side and the right side of the upper surface of the pressing plate 501 are fixedly connected with fixing columns 502, the top ends of the two fixing columns 502 are respectively provided with a spring groove 503, the bottom walls of the two spring grooves 503 are respectively fixedly connected with a second spring 504, the top end of the second spring 504 is fixedly connected with the bottom end of an inserting column 505 inserted in the spring groove 503, the top ends of the two inserting columns 505 respectively penetrate through the two spring grooves 503 and are fixedly connected with the inner bottom wall of the cover 2, when the transformer works specifically, the cover 2 is covered on the top of the transformer body 1, the pressing plate 501 is contacted with the top end of the iron core 8 to press the iron core 8, the second spring 504 is compressed, the iron core 8 is pressed by the elasticity of the second spring 504, the second spring 504 buffers impact when the transformer is impacted and vibrated, the pressure of the second spring 504 is utilized to help the positioning of the iron core 8 to avoid excessive jumping of the transformer, the first spring 13 and the second spring 504, the lower surface of the horizontal plate 402 is higher than the bottom ends of the two vertical plates 401, the lower surface of the horizontal plate 402 is higher than the bottom ends of the vertical plates 401, the heat exchange oil filled into the device body 1 by the submersible pump 303 cannot be influenced, the top end of the device body 1 is provided with a sealing groove 14, the bottom end of the cover 2 is fixedly connected with a sealing frame 15 corresponding to the sealing groove 14, the sealing frame 15 is inserted into the sealing groove 14, the sealing frame 15 is a rubber frame, the sealing at the joint of the cover 2 and the device body 1 can be improved by inserting the sealing frame 15 into the sealing groove 14, and the heat exchange oil is.

When the transformer is used, a user opens the cover 2 to place the iron core 8 and the coil 9 into the transformer body 1, the two positioning blocks 404 are placed into the transformer body 1 and are respectively inserted into the two positioning grooves 403, the bottom end of the iron core 8 is contacted with the bottom wall of the limiting groove 405, the first spring 13 is compressed, the falling of the iron core 8 is buffered, the first spring 13 is matched with the second spring 504 in the positioning device 5 to provide the buffer of vibration and impact force for the iron core 8 and the coil 9 when the transformer is vibrated, the iron core 8 and the coil 9 are prevented from being damaged, the cover 2 is covered on the top of the transformer body 1, the pressing plate 501 is contacted with the top end of the iron core 8 to press the iron core 8, the two fixing frames 12 are fixed by using bolts, the second spring 504 is compressed, the elastic force of the second spring 504 presses the iron core 8, the second spring 504 buffers impact when the transformer is impacted and vibrated, the heat exchange oil is prevented from jumping excessively, the heat exchange oil is filled in the device body 1 and the oil tank 301, the submersible pump 303 enables the heat exchange oil to form circulation between the oil tank 301 and the device body 1, heat on the coil 9 is taken away in the circulation process of the heat exchange oil, the heat is dissipated in the oil tank 301 and the communicating pipe 302, heat generated in the working process of the coil 9 can be effectively taken away, and the influence of the heat on the working of the transformer is reduced.

To sum up, this single-phase transformer for photovoltaic through being provided with heat sink 3, dashes into heat transfer oil in ware body 1 and oil tank 301, makes heat transfer oil form the circulation between oil tank 301 and ware body 1 through immersible pump 303, and the heat on coil 9 is taken away in the in-process of heat transfer oil circulation, gives off heat in oil tank 301 and communicating pipe 302, can effectually take away the heat that coil 9 during operation produced, reduces the influence of heat to transformer work, has solved the transformer heat and has piled up the problem that can make the transformer appear damaging.

This single-phase transformer for photovoltaic, through being provided with buffer 4, utilize the sliding connection of locating piece 404 and constant head tank 403, can be for the installation location of iron core 8, through first spring 13 swing joint between the lower lateral wall of guide block 11 and guide way 10, the impact force that the whereabouts produced when can utilize the elasticity buffering iron core of first spring 13 to install, avoid iron core 8 and coil 9 to receive the damage, and after the installation is accomplished, second spring 504 in the cooperation first spring 13 cooperation positioner 5 can provide the shock attenuation for iron core 8 and coil 9, reduce the damage that comes from vibrations that iron core 8 and coil 9 received, the problem that proposes in the background art has been solved.

This single-phase transformer for photovoltaic through being provided with positioner 5, iron core 8 is pushed down in clamp plate 501 and the top contact of iron core 8, and second spring 504 compresses, utilizes the elasticity of second spring 504 to push down iron core 8, and second spring 504 buffering when the transformer receives impact and vibrations strikes to utilize the pressure help iron core 8 location of second spring 504, avoid it excessively to beat.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a single-phase transformer for photovoltaic, includes the ware body (1), lid (2), heat sink (3), buffer (4), positioner (5), landing leg (6), blotter (7), iron core (8), coil (9), guide way (10), guide block (11), fixed frame (12) and first spring (13), the lower fixed surface of heat sink (3) installs landing leg (6), the bottom of landing leg (6) bonds there is blotter (7), the bottom of lid (2) and the open end contact of the ware body (1), the medial surface of two fixed frames (12) of bottom of lid (2) lateral surface and the top of the ware body (1) lateral surface of fixedly connected with respectively, two fixed frame (12) are through bolt fixed connection, its characterized in that: the lower surface of the device body (1) is fixedly connected with the upper surface of a cooling device (3), the left side wall and the right side wall inside the device body (1) are respectively provided with a guide groove (10), the insides of the two guide grooves (10) are respectively connected with a guide block (11) in a sliding manner, the lower surface of each guide block (11) is movably connected with the lower side wall of each guide groove (10) through a first spring (13), the opposite side surfaces of the two guide blocks (11) are respectively fixedly connected with the left side surface and the right side surface of a buffer device (4), an iron core (8) is arranged inside the buffer device (4), a coil (9) is wound outside the iron core (8), a positioning device (5) is fixedly installed on the inner bottom wall of the device cover (2), and the lower surface of the positioning device (5) is in contact with the upper surface of the iron core;

the cooling device (3) comprises an oil tank (301), communication pipes (302) and a submersible pump (303), the upper surface of the oil tank (301) is fixedly connected with the lower surface of the device body (1), the lower surface of the oil tank (301) is fixedly connected with the support legs (6), the submersible pump (303) is fixedly installed on the inner bottom wall of the oil tank (301), the oil inlet end of the submersible pump (303) sequentially penetrates through the top wall of the oil tank (301) and the bottom wall of the device body (1) and is communicated with the inside of the device body (1), the left side wall and the right side wall of the oil tank (301) are respectively and fixedly communicated with the oil inlet ends of the two communication pipes (302), and the oil outlet ends of the two communication pipes (302) respectively penetrate through the top ends of the left side wall and the right side wall;

the buffer device (4) comprises two vertical plates (401), a transverse plate (402), a positioning groove (403), a positioning block (404) and a limiting groove (405), one side surface of each of the two guide blocks (11) opposite to each other is fixedly connected with the bottom ends of the outer side surfaces of the two vertical plates (401), the bottom ends of the inner side surfaces of the two vertical plates (401) are fixedly connected with the left side surface and the right side surface of the transverse plate (402) respectively, the upper surface of the transverse plate (402) is provided with a positioning groove (403), the iron core (8) and the coil (9) are inserted in the positioning groove (403), the inner side surfaces of the two vertical plates (401) are provided with positioning grooves (403) extending from top to bottom, the top end of the positioning groove (403) is open, the positioning block (404) is connected to the inside of the positioning groove (403) in a sliding mode, and two positioning grooves (403) extend from one end, opposite to the two positioning blocks (404), and are fixedly connected with the left side face and the right side face of the iron core (8) respectively.

2. The photovoltaic single-phase transformer of claim 1, wherein: the positioning device (5) comprises a pressing plate (501), two fixing columns (502), spring grooves (503), a second spring (504) and two inserting columns (505), the lower surface of the pressing plate (501) is in contact with the top end of an iron core (8), the fixing columns (502) are fixedly connected to the left side and the right side of the upper surface of the pressing plate (501), the spring grooves (503) are formed in the top ends of the two fixing columns (502), the second spring (504) is fixedly connected to the bottom wall of the spring groove (503), the bottom end of the inserting column (505) inserted into the spring groove (503) is fixedly connected to the top end of the second spring (504), and the top ends of the two inserting columns (505) penetrate through the two spring grooves (503) respectively and are fixedly connected with the inner bottom wall of the cover (2).

3. The photovoltaic single-phase transformer of claim 2, wherein: the first spring (13) and the second spring (504) are both compression springs, the first spring (13) and the second spring (504) are both in a compression state, and the lower surface of the transverse plate (402) is higher than the bottom ends of the two vertical plates (401).

4. The photovoltaic single-phase transformer of claim 3, wherein: seal groove (14) have been seted up on the top of ware body (1), the position fixedly connected with seal frame (15) of seal groove (14) is corresponded to lid (2) bottom, the inside at seal groove (14) is pegged graft in seal frame (15), seal frame (15) are the rubber frame.