CN108109812B - Low-loss dry-type transformer - Google Patents

Low-loss dry-type transformer Download PDF

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Publication number
CN108109812B
CN108109812B CN201810019458.XA CN201810019458A CN108109812B CN 108109812 B CN108109812 B CN 108109812B CN 201810019458 A CN201810019458 A CN 201810019458A CN 108109812 B CN108109812 B CN 108109812B
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China
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filter screen
transformer
cover body
layer
iron core
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CN201810019458.XA
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CN108109812A (en
Inventor
段现英
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GUANGDONG HUALITONG TRANSFORMER Co.,Ltd.
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Guangdong Hualitong Transformer Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/346—Preventing or reducing leakage fields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/025—Constructional details relating to cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/085—Cooling by ambient air
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2876—Cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F2027/348—Preventing eddy currents

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Patch Boards (AREA)
  • Transformer Cooling (AREA)

Abstract

A low-loss dry-type transformer comprises an iron core, a coil, a clamping piece and the like, wherein the coil comprises a low-voltage coil and a high-voltage coil, the iron core consists of an upper iron yoke, a lower iron yoke, an upper clamping piece, a lower clamping piece, a side screw rod and a pulling plate, the pulling plate is an iron core pulling plate body made of steel, and the iron core pulling plate body is provided with a hole; make the transformer still including the outside dustproof cover body that ventilates, the cover body divide into roof, mid portion and bottom plate, and cover body mid portion is provided with a plurality of air inlet windows, the air inlet window is provided with multilayer filter screen structure, and multilayer filter screen is structural to be provided with automatic dirt mechanism of trembling to realize reducing the transformer loss, promote transformer ventilation dustproof performance, effectively promote energy-conserving effect.

Description

Low-loss dry-type transformer
Technical Field
The invention belongs to the field of power equipment, and particularly relates to a low-loss dry-type transformer structure.
Background
The transformer is a device for changing alternating voltage by utilizing the principle of electromagnetic induction, and due to the fact that the transformer is power equipment, when the transformer runs, electric energy loss in a winding and an iron core can generate heat to cause overheating of the transformer, if the heat is not dissipated in time, the transformer can be damaged in an insulation mode to cause power system faults, even fire disasters and other safety accidents.
Meanwhile, when the loss of the transformer iron core is too large, the transformer generates heat seriously, the vibration is too large, the iron core structure is fastened from the transformer structure, and the loss can be reduced by reducing the magnetic leakage.
The existing dry-type transformer box body is mainly forced to cool by a fan, in order to keep air circulation, an air inlet hole is required to be formed in the box body, and external dust easily enters the box body through the air inlet hole to damage electronic elements in the box body; meanwhile, western regions of China are rich in power resources and have plenty of surplus, but the western regions are high in wind and sand content, if the dustproof net is simply used or a transformer box body used in the common environment in the prior art is used, a large amount of dust easily blocks the dustproof net of the air inlet hole, so that external cold air cannot enter the transformer cabinet, the transformer is damaged due to overhigh temperature, and the whole equipment stops working.
Disclosure of Invention
In order to solve the problems, the invention discloses a low-loss dry-type transformer which is compact in structure and low in iron core loss, adopts a ventilation cooling cover body form, does not need oil immersion, can realize ventilation heat dissipation and dustproof functions, is suitable for environments with large wind sand, automatically and efficiently reduces the temperature of the transformer and improves the safety of the transformer.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the utility model provides a low-loss dry-type transformer, including unshakable in one's determination, the coil, the folder, the cushion, the pressure nail, a pedestal, wherein the coil includes low-voltage coil and high-voltage coil, unshakable in one's determination is by last indisputable yoke, lower indisputable yoke, go up the folder, lower folder, other screw rod, the arm-tie is constituteed, wherein go up indisputable yoke and connect gradually folder and last cushion, lower indisputable yoke connects gradually folder and cushion down, other screw rod passes respectively and transversely passes upper and lower folder respectively, go up the cushion and rely on the pressure nail to compress tightly on the coil, the arm-tie is connected with the last indisputable yoke and the lower: the pull plate is an iron core pull plate body made of steel, and the iron core pull plate body is provided with a hole; the transformer still including the outside dustproof cover body that ventilates, the cover body divide into roof, mid portion and bottom plate, and cover body mid portion is provided with a plurality of air inlet windows, the air inlet window is provided with multilayer filter screen structure, and multilayer filter screen is structural to be provided with automatic dirt mechanism of trembling.
The holes are long holes extending along the length direction and the width direction, and the long holes in the two directions are in a cross shape; and a pull plate insulating piece is arranged between the pull plate and the iron core.
The upper clamping piece 2 is provided with a plurality of concave heat dissipation notches.
The roof of the ventilation dustproof cover body is in a shape of a human body, and the human-shaped roof comprises a middle transverse wide part, two side inclined parts and a top rain shielding part.
Set up a plurality of convulsions holes on the horizontal wide portion, downthehole high-power exhaust fan that is equipped with, be provided with solar energy on the slope of both sides and accept the module, it is in through setting up to hide rain portion bracing piece support in the horizontal wide portion set up in on the horizontal wide portion, be used for preventing rainwater and dust from getting into the internal portion of cover through the convulsions hole.
The middle part of the ventilation dustproof cover body is of a four-side double-layer structure, wherein a plurality of air inlet windows are arranged on each side, and each air inlet window is of an S-shaped structure in the double-layer structure integrally.
A shutter is arranged outside the lower opening in the S-shaped structural window, and a multi-layer filter screen structure is arranged in the upper opening.
The multi-layer filter screen is divided into an outer filter screen layer, a middle filter screen layer and an inner filter screen layer, wherein filter holes of the outer filter screen layer are in a honeycomb shape, filter holes of the inner filter screen layer are in a grid shape which is crossed transversely and vertically, the middle filter screen layer is in an irregular net structure, the middle filter screen layer is filled between the outer filter screen layer and the inner filter screen layer, and the outer filter screen layer, the middle filter screen layer and the inner filter screen layer are welded into an integral structure.
The bottom corresponding part corresponding to the filter screen in the inner layer cover body in the middle of the ventilation dustproof cover body is of a hollow structure, the automatic dust shaking mechanism comprises an insulating wire body, one end of the insulating wire body is buckled on the surface of the filter screen, and the other end of the insulating wire body is buckled on a hole formed in a transformer clamping piece.
The insulating wire body is divided into two parts through the middle oblate fixing part, wherein one side is divided into a plurality of wire dividing bodies, the number of the wire dividing bodies corresponds to the number of the air inlet windows or the filter screens, and one end of the other side, which is connected with the clamping piece, is an independent bus body.
The oblate fixing parts are a pair of magnetic attraction bodies, wherein the fixing parts connected with the plurality of branch bodies are made of metal materials, and the fixing parts connected with the main line bodies are made of ferrite materials wound by coils.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the pull plate is provided with the cross-shaped magnetic-breaking notch, so that magnetic leakage can be cut off more than a single-strip-shaped notch, and eddy current loss is effectively reduced;
(2) the upper clamping piece is provided with a plurality of concave heat dissipation notches, so that the clamping piece does not influence a longitudinal upper heat dissipation channel of the iron core coil any more;
(3) its roof design of outside ventilation dust guard body is unique, when blockking that outside rainwater gets into, exhaust passage is smooth and easy, utilizes chimney effect to make exhaust effectual to can the rational utilization solar energy, and the midbody air inlet is effectual, simultaneously, under the great environment of northwest wind sand, can effectively reduce the influence of wind sand.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of a transformer body according to the present invention;
FIG. 2 is a top view of a transformer body according to the present invention;
FIG. 3 is a schematic view of an external ventilated dust enclosure of the present invention;
FIG. 4 is a schematic view of the middle portion of the external ventilated dust cover of the present invention
Reference numbers and corresponding part names in the drawings:
1-upper clamping piece, 2-lower clamping piece, 3 pulling plate, 4 coils, 41-high-voltage coil, 42-low-voltage coil, 5 iron cores, 6 heat dissipation notches, 7 ventilation dustproof cover body top plates, 71 top rain shielding parts, 72 supporting rods, 73 air suction holes, 74 two-side inclined parts, 8 ventilation dustproof cover body middle parts, 9 air inlet windows, 91 filter screens, 92 lower part through holes, 93 hollow structures, 94 oblate fixing parts, 941 wire dividing bodies and 942 bus bodies.
Detailed Description
A low-loss dry-type transformer comprises an iron core 5, a coil 4, clamping pieces, cushion blocks, press nails and a base, wherein the coil comprises a low-voltage coil 41 and a high-voltage coil 42, the iron core consists of an upper iron yoke, a lower iron yoke, an upper clamping piece 1, a lower clamping piece 2, side screw rods and a pulling plate 3, the upper iron yoke is sequentially connected with the upper clamping piece 1 and the upper cushion block, the lower iron yoke is sequentially connected with the lower clamping piece 2 and the lower cushion block, the side screw rods respectively transversely penetrate through the upper clamping piece and the lower clamping piece, the upper cushion block is pressed on the coil by the press nails, the pulling plate 3 is respectively connected with the upper iron yoke and the lower iron yoke of the iron core, the pulling plate 3 is an iron core pulling plate body made of steel, and holes are formed in the iron; the transformer is still including the outside dustproof cover body that ventilates, and the cover body divide into roof 7, middle part 8 and bottom plate, and cover body middle part 8 is provided with a plurality of air inlet windows 9, air inlet window 9 is provided with multilayer filter screen structure 91, multilayer filter screen structure is last to be provided with automatic dirt mechanism of trembling.
Wherein arm-tie 3 is the iron core arm-tie body of being made by the steel to be equipped with the slot hole that extends along length direction and span direction at the iron core arm-tie body, the slot hole of two directions forms into the cross, and the slot hole of cross form can effectively cut off the magnetic leakage route, reduces eddy current loss, makes the material cost reduction of iron core arm-tie body simultaneously.
The iron core 5 and the coil 4 are sequentially arranged according to the sequence of the iron core 5, the inner insulating cylinder, the high-voltage coil 41, the outer insulating cylinder and the low-voltage coil 42, wherein the inner insulating cylinder and the outer insulating cylinder are respectively fixed with an inner dressing stay and an outer dressing stay, and the end part of the dressing stay is a nearly round angle. The arrangement of the dressing stay and the insulating cylinder enables the inner part and the outer part of the coil to be formed with air ducts, and the inner air ducts are matched with an external ventilation structure to enable the temperature in the transformer core and the coil to be effectively dissipated. And the end part of the stay is arranged in a manner of being close to a round angle, so that the end part loss can be reduced.
The transformer is still including the outside dustproof cover body that ventilates, the cover body divide into roof 7, mid portion 8 and bottom plate, the roof is for setting up to humanoid, humanoid roof is including middle horizontal wide portion, both sides rake 74 and top hide rain portion 71, set up a plurality of convulsions holes 73 on the horizontal wide portion, downthehole high-power exhaust fan that is equipped with, be provided with solar energy receiving module on the both sides rake 74, it supports through the bracing piece 72 that sets up in horizontal wide portion to hide rain portion 71, be used for preventing rainwater and dust through the convulsions hole entering cover internal portion. The human-shaped top plate is favorable for draining rainwater down quickly and preventing ponding, and can play the protective action of keeping out the wind and keeping out the rain to the middle part 8 of below, and the solar energy structure module that sets up on the top plate 7 can effectively utilize solar energy, charges for the battery, and for the power supply of the consumer in the cabinet, energy-concerving and environment-protective.
Cover body mid portion 8 sets up to four sides bilayer structure, wherein all is provided with a plurality of air inlet windows on each face, and every air inlet window wholly is S type structure in bilayer structure, and its lower part opening 92 of S type window is provided with the shutter outward, is provided with multilayer filter screen structure 91 in the opening of upper portion, can effectively keep out the dust and sand under the special environment through shutter, S type structure, multilayer filter screen structure, and the whole operating efficiency of dry-type transformer is high.
Wherein, the multi-layer filter screen 91 is divided into an outer, a middle and an inner three-layer filter screen structure, and the filter holes of the outer filter screen layer are honeycomb-shaped; the filter holes of the inner filter screen layer are in a grid shape which is crossed horizontally and vertically, the middle filter screen layer is in an irregular net structure, the middle filter screen layer is filled between the outer filter screen layer and the inner filter screen layer, and the outer filter screen layer, the middle filter screen layer and the inner filter screen layer are welded into an integral structure.
However, no matter the transformer for power generation, power transformation or power distribution is an unattended transformer, the transformer used for a long time has the advantages that the dustproof filter screen is blocked by a large amount of dust, the ventilation effect is greatly reduced, the temperature of the transformer is high, and the loss is large.
Therefore, cover body middle part 8 sets up to bilayer structure, at this moment, the corresponding part in the bottom that corresponds with the filter screen in its inlayer cover body that has certain thickness designs for hollow structure 93, filter screen 91 can be fixed in the top part of the inlayer cover body correspondingly integratively, simultaneously, utilize insulating line body one end to detain and locate filter screen 91 surface, the other end is detained and is established on seting up the hole on the transformer clamp, vibrations when running through the transformer body, drive the slight vibrations of filter screen, shake off the dust that adsorbs on the filter screen surface from this, and drop via hollow structure 93. A drawer-shaped dust collecting groove is arranged at the bottom position corresponding to the hollow structure in the inner layer cover body.
The insulating wire body is divided into two parts by the middle oblate fixing part 94, wherein one side is divided into a plurality of wire dividing bodies 941, the number of the wire dividing bodies corresponds to the number of the air inlet windows or the filter screens, and one end connected with the clamping piece at the other side is a single bus body 942.
The oblate fixed portion 94 may be a pair of magnetic attraction bodies, and the oblate fixed portion 94 is placed on a support platform provided in the cover body; the fixing portions connected to the plurality of branch lines 941 are made of metal, the fixing portions connected to the bus line 942 are made of ferrite material wound by coils, ends of the coils are connected to a power supply portion provided by solar energy, the power supply portion supplies current to the coils, the coils are energized to excite the ferrite to generate magnetism, and metal is attracted to complete connection between the filter screen and the transformer clamp. In a preferred embodiment, a controller such as a time relay is connected to the loop of the electrified coil to control the electrifying time and the electrifying duration of the electrified coil so as to complete the connection of the insulated wire body.

Claims (4)

1. The utility model provides a low-loss dry-type transformer, including unshakable in one's determination, the coil, the folder, the cushion, the pressure nail, a pedestal, wherein the coil includes low-voltage coil and high-voltage coil, unshakable in one's determination is by last indisputable yoke, lower indisputable yoke, go up the folder, lower folder, other screw rod, the arm-tie is constituteed, wherein go up indisputable yoke and connect gradually folder and last cushion, lower indisputable yoke connects gradually folder and cushion down, other screw rod passes respectively and transversely passes upper and lower folder respectively, go up the cushion and rely on the pressure nail to compress tightly on the coil, the arm-tie is connected with the last indisputable yoke and the lower: the pull plate is an iron core pull plate body made of steel, the iron core pull plate body is provided with holes, the holes are long holes extending along the length direction and the width direction, and the long holes in the two directions form a cross shape; a pull plate insulating piece is arranged between the pull plate and the iron core; the transformer also comprises an external ventilation dustproof cover body which is divided into a top plate, a middle part and a bottom plate, the middle part of the cover body is provided with a plurality of air inlet windows, the air inlet windows are provided with a multi-layer filter screen structure, the multi-layer filter screen structure is provided with an automatic dust shaking mechanism,
the middle part of the cover body is of a four-side structure, wherein a plurality of air inlet windows are arranged on each side, each air inlet window is integrally of an S-shaped structure in a double-layer structure body, a louver is arranged outside an opening at the lower part of the S-shaped window, the multi-layer filter screen structure is arranged in an opening at the upper part, the multi-layer filter screen is divided into an outer filter screen structure, a middle filter screen structure and an inner filter screen structure, and filter holes of the outer filter screen layer are of a honeycomb; the inner filter screen layer is in a grid shape which is crossed horizontally and vertically, the middle filter screen layer is in an irregular net structure, the middle filter screen layer is filled between the outer filter screen layer and the inner filter screen layer, the outer filter screen layer, the middle filter screen layer and the inner filter screen layer are welded into an integral structure, the middle part of the cover body is in a double-layer structure, the corresponding part at the bottom of the inner cover body with certain thickness, which corresponds to the filter screen, is designed into a hollow structure, the filter screen is correspondingly and integrally fixed at the top part of the inner cover body, the bottom of the inner cover body, which corresponds to the hollow structure, is provided with a drawer-shaped dust collecting groove,
the automatic dust shaking mechanism comprises an insulating wire body, one end of the insulating wire body is buckled on the surface of the filter screen, the other end of the insulating wire body is buckled on a hole formed in a transformer clamping piece, the insulating wire body is divided into two parts through a middle oblate fixing part, one side of the insulating wire body is divided into a plurality of wire dividing bodies, the number of the wire dividing bodies corresponds to that of an air inlet window or the filter screen, one end of the other side clamping piece connected with the main body is a single main wire body, the oblate fixing part is a pair of magnetic suction bodies, the fixing part connected with the wire dividing bodies is made of metal materials, the fixing part connected with the main wire body is made of ferrite materials wound by coils, and the slight vibration of the filter screen is driven through the vibration of the transformer body during operation, so that dust adsorbed on the surface of the filter.
2. The low loss dry transformer according to claim 1, wherein: a plurality of concave heat dissipation notches are formed in the upper clamping piece.
3. The low loss dry transformer according to claim 1, wherein: the roof of the ventilation dustproof cover body is in a shape of a human body, and the human-shaped roof comprises a middle transverse wide part, two side inclined parts and a top rain shielding part.
4. The low loss dry transformer according to claim 3, wherein: set up a plurality of convulsions holes on the horizontal wide portion, downthehole high-power exhaust fan that is equipped with, be provided with solar energy on the slope of both sides and accept the module, it is in through setting up to hide rain portion bracing piece support in the horizontal wide portion set up in on the horizontal wide portion, be used for preventing rainwater and dust from getting into the internal portion of cover through the convulsions hole.
CN201810019458.XA 2018-01-09 2018-01-09 Low-loss dry-type transformer Active CN108109812B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN108109812B true CN108109812B (en) 2020-06-16

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Publication number Priority date Publication date Assignee Title
KR101341886B1 (en) * 2013-03-21 2013-12-17 (주)우진에프.에이 Power box for automibile assembly line
CN105390256B (en) * 2015-11-05 2017-12-22 苏州腾冉电气设备股份有限公司 A kind of leakage transformer
CN106329335B (en) * 2016-11-14 2018-01-26 天源华威集团有限公司 dustproof electric cabinet
CN206323040U (en) * 2016-11-30 2017-07-11 扬州市光宇照明有限公司 Photovoltaic plant with novel window blind
CN206340412U (en) * 2016-12-26 2017-07-18 重庆九能控股有限公司 A kind of environmental protection silent dry-type transformer
CN206575068U (en) * 2017-01-20 2017-10-20 国网安徽省电力公司太湖县供电公司 A kind of power engineering box-type substation

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Address after: 528200 Huangqi Zhonglian cable factory, Dali Town, Nanhai District, Foshan City, Guangdong Province

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