CN109065350B - Device for standing up and laying down iron core lamination of transformer and use method thereof - Google Patents
Device for standing up and laying down iron core lamination of transformer and use method thereof Download PDFInfo
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- CN109065350B CN109065350B CN201811200601.1A CN201811200601A CN109065350B CN 109065350 B CN109065350 B CN 109065350B CN 201811200601 A CN201811200601 A CN 201811200601A CN 109065350 B CN109065350 B CN 109065350B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0233—Manufacturing of magnetic circuits made from sheets
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Abstract
The invention discloses a device for standing up and falling down a transformer core lamination and a use method thereof, which are characterized in that the device is formed by welding a steel plate platform, at least two supports and at least two lifting gravity center adjusting rods, wherein the supports form a mounting surface and a correction surface which are 90 degrees mutually, the outer corner positions adopt circular arc transition, and the lifting gravity center adjusting rods are welded on the supports and are opposite to the correction surface; the rod is provided with a hanging plate and a plurality of hanging holes corresponding to different hanging gravity centers; according to the installation gap of the iron core lower clamping piece, a plurality of middle cushion blocks and small cushion blocks with different thicknesses are respectively arranged to enable the iron core lower clamping piece and the installation surface to be in a horizontal state, and long cushion blocks are arranged on the inner side of the correction surface; at least one pair of fastening nuts are arranged on the mounting surface, and the fastening nuts, the clamping screw rods and the channel steel clamping pieces form a clamping fixture of the iron core and the support. The invention does not damage the iron core sheet, does not generate displacement of the iron core sheet, ensures the size and shape of the original iron core, and can reduce the iron core noise by 3-5 decibels.
Description
Technical Field
The invention relates to the technical field of manufacturing of transformers, in particular to a device for standing up and laying down a transformer core lamination and a use method thereof.
Background
Noise is emitted from all operating transformers. The transformer generates noise due to various reasons, and the iron core, the winding, the oil tank, the cooler, the cooling fan, the bracket and the like generate noise. In particular, a dry-type transformer is installed in an indoor environment, and noise may be increased by reflection from a wall surface. If the noise is influenced for a long time, the noise can cause great harm to people.
The iron core is a main component of the transformer and is also a source of noise generated by vibration of the transformer body. The main reason for the noise generated by the iron core is that the silicon steel sheet forming the iron core generates magnetostriction phenomenon under the action of alternating magnetic field, the geometric dimension of the silicon steel sheet is repeatedly and slightly elongated or shortened in a certain direction, and the length of the silicon steel sheet is changed, so that periodic vibration or sound wave is generated, and noise is generated. The vibration of the iron core caused by the electromagnetic attraction force generated by magnetic leakage exists between the joint of the silicon steel sheets and the lamination, and the noise is increased.
Various factors influencing the noise generated by the iron core are included, for example, the silicon steel sheet is too poor in material quality, high in loss, large in magnetostriction rate and larger in noise; the working magnetic density of the iron core is too high, the saturation is approached, the magnetic leakage is too large, and the generated noise is also increased sharply; the shearing burrs of the iron core sheets are large, gaps between joints are too large, magnetic force lines are bent in the form of joints, the magnetic force lines transversely penetrate through the adjacent silicon steel sheets at the joints, eddy currents and magnetic saturation are generated, and the factors of noise and no-load loss increase are also caused; in addition, the ratio of the iron core window height to the iron core diameter is too large, and the total weight of the silicon steel sheet is too large, so that noise is increased; the clamping force of binding and fastening the iron core sheets is too large or too small, the clamping and fixing of the whole iron core are not firm, and particularly, the noise is easy to increase when the processing is poor on the outermost silicon steel sheets; moreover, the evenness of the iron core sheet is poor, the coating on the surface of the iron core sheet is improper due to the tilted sheet and the tilted angle, the method for standing up after the iron core lamination is improper, simple direct snapping is adopted to cause lamination displacement, and the bending deformation of the core column can cause the increase of the noise of the iron core and even the increase of the multiple times.
The noise level of the transformer is specified in the national standard, and the requirements of the use function characteristics and the environmental quality according to the region are specified for the forced execution standard and cannot exceed the corresponding limit value. In particular, the dry-type transformer installed in urban centers and indoors is closer to people, and the noise size is more severely limited. Therefore, reducing noise of the transformer is an urgent problem to be solved by the transformer manufacturing industry. For this reason, transformer manufacturers always want to try to reduce the noise of the transformer core, as much as possible to meet every technical condition of the core manufacturing.
Disclosure of Invention
The invention aims to provide a device for standing up and laying down a transformer core lamination and a use method thereof. When the iron core is manufactured, the iron core lamination is ensured to be flat and matched with the seam in the process of rising, the iron core lamination is not displaced and is not deformed as a whole after rising, thereby achieving the purposes of reducing the vibration and noise of the iron core, and when the iron core is found to be defective, the standing iron core is placed down when the iron core is required to be processed.
The technical scheme of the invention is as follows:
the device for standing and falling the iron core lamination of the transformer is formed by welding a steel plate platform, at least two supports and at least two lifting gravity center adjusting rods, wherein the supports form a mounting surface and a correcting surface, the mounting surface and the correcting surface form 90 degrees with each other, the outer turning angle is in arc transition, and the lifting gravity center adjusting rods are welded at the end parts of the mounting surface of the supports and are opposite to the positions of the correcting surface; the lifting gravity center adjusting rod is provided with a lifting plate and a plurality of lifting holes, and different lifting holes correspond to different lifting gravity centers; according to the gap between the iron core lower clamping piece and the mounting surface, a plurality of middle cushion blocks and small cushion blocks with different thicknesses are respectively placed so that the iron core lower clamping piece and the mounting surface are in a horizontal state, and long cushion blocks are arranged on the inner side of the correction surface; at least one pair of fastening nuts are arranged on the mounting surface, and the fastening nuts, the clamping screw rods and the channel steel clamping pieces form a clamping fixture of the iron core and the support.
Further, five channel steel clamping pieces, two clamping screws and four iron core sheet clamping screws are arranged in the device, wherein the four channel steel clamping pieces and the four iron core sheet clamping screws form an iron core clamp, and a pair of fastening nuts, the two clamping screws and the channel steel clamping piece form an iron core and support clamping clamp.
Further, the support adopts a square tube structure, the arc radius of the arc transition at the outer corners of the mounting surface and the correcting surface is the tube width of the square tube of the support, and the square tube is welded with the steel plate platform.
Further, the lifting gravity center adjusting rod adopts a square pipe structure, the height H of the lifting gravity center adjusting rod is L.tan 15 DEG of the mounting surface length, 3-4 lifting holes with different lifting positions are formed in the lifting gravity center adjusting rod, and the 3-4 lifting holes at least comprise the following two lifting hole positions: namely, the center of gravity G of the whole iron core and the vertical ground center line OK of the lifting hook point to the lifting hole position on one side of the correcting surface after the arc transition at the outer turning angle and the lifting hole position on one side of the mounting surface after the arc transition at the outer turning angle.
The device can not only enable the lying iron core to be integrally erected, but also enable the standing iron core to be laid down, does not damage the iron core sheets, does not generate displacement of the iron core sheets, ensures that the size and the shape of the original iron core are not changed slightly, and can reduce the iron core noise by 3-5 decibels.
Drawings
FIG. 1 is a side view of a transformer core stack of the present invention in an up and down position;
FIG. 2 is a top view of a transformer core stack of the present invention in an up and down position;
FIG. 3 is a schematic view of a transformer core stack lifting and lowering apparatus of the present invention;
FIG. 4 is a schematic view of a transformer core stack lifting and lowering apparatus according to the present invention;
in the figure: the steel plate platform 1, the support 2, the gravity center adjusting rod 3, the reinforcing iron 4, the hanger plate 5, the fastening nut 6, the clamping screw 7, the channel steel clamping piece 8, the long cushion block 9, the middle cushion block 10, the small cushion block 11, the iron core sheet clamping screw 12, the iron core 13, the iron core hanger plate 14 and the gravity center G.
Detailed Description
The present invention will be further described by the following examples, however, the scope of the present invention is not limited to the following examples.
Example 1:
a device for standing and falling a transformer iron core lamination is formed by welding a steel plate platform 1, two supports 2 and two lifting gravity center adjusting rods 3 into a U-shaped fixing support in side view, and welding a reinforcing iron 4, a hanging plate 5 and two pairs of fastening nuts 6 for alternative fastening together with accessories: five channel steel clamping pieces 8, two long cushion blocks 9, a plurality of middle cushion blocks 10 and small cushion blocks 11 with different thicknesses, two iron cores, clamping screws 7 for clamping the device, and four iron core sheet clamping screws 12, thereby forming the device for standing and laying the transformer iron core lamination. The four channel steel clamping pieces 8 and four core sheet clamping screws 12 form a core clamp, and one channel steel clamping piece 8 and two pairs of fastening nuts 6 for selective fastening form a clamping clamp of the core and the support 2 through two core clamping screws 7 clamped by the device.
The steel plate platform 1 is rectangular with the thickness of more than 12mm and the L multiplied by B of 1900X1500 (mm), can also be square, the back surface of the steel plate platform is welded with the fastening nut 6, and holes are correspondingly formed in the steel plate platform 1, so that the clamping screw 7 can be connected and fastened with the fastening nut 6 through the holes; the support 2 is a square pipe formed by welding two channel steel grooves on a groove joint surface, the two sides of A, B are mutually 90 degrees, the 90-degree arc at the corner is used for transition, the radius of the arc is the width of the steel groove of the support 2, and meanwhile, the support 2 and the steel plate platform 1 are welded together; the lifting gravity center adjusting rod 3 is a rectangular pipe formed by welding and sealing a groove with a steel plate by using a single channel steel, the height H is about L.tan 15 degrees (mm), for example 1900.tan 15 degrees (mm) =509 (mm), 500mm is taken, and the lifting and falling tasks of the iron core with weight of 5000kg, center distance of the core column of no more than 600mm and height of no more than 1700mm can be completed; the end part is provided with 3-4 lifting holes with selectable lifting positions, which are used for adjusting whether the center of gravity G of the whole device and the iron core and the vertical ground center line OK of the lifting hook are directed into the surface A or are directed out of the surface A during lifting.
Example 2:
the method for using the transformer core lamination standing device comprises the following steps: firstly, the iron core lamination standing device is flatly placed according to fig. 1, firstly, a support 2 is landed according to a mounting surface B, two channel steel clamping pieces 8 are respectively placed on a steel plate platform 1, iron core lower clamping pieces are placed on the channel steel clamping pieces 8, the two channel steel clamping pieces 8 are positioned at positions capable of clamping up and down an iron core window, and a long cushion block 9 is placed on the inner side of a support correcting surface; before the lamination, the iron core lower clamping piece is abutted against the long cushion block 9, a middle cushion block 10 and a small cushion block 11 are respectively arranged between the iron core lower clamping piece and the mounting surface according to the gap between the iron core lower clamping piece and the mounting surface, the iron core lower clamping piece and the mounting surface are kept in a horizontal state, and then the lamination of iron core sheets is started; when the iron core sheets are stacked, the long cushion blocks 9 on the correction surface are used as correction cushion blocks to keep the iron core sheets neat; after lamination, an iron core upper clamping piece and a channel steel clamping piece 8 are placed on an iron core sheet, the four channel steel clamping pieces 8 on the upper surface and the lower surface of the iron core are oppositely arranged to form two pairs of channel steel clamps, and the iron core sheet clamping screw 12 is used for clamping the two pairs of channel steel clamps; then a pair of fastening nuts 6 are selected on the steel plate platform 1, another channel steel clamping piece 8 is placed on the iron core upper clamping piece, the iron core 13 and the support 2 are clamped together by the clamping screw 7 between the pair of fastening nuts 6 and the channel steel clamping piece, and then the iron core standing operation is carried out; during the lifting operation, predicting the gravity center position G of the iron core 13 and the whole support 2 by using a ruler, connecting the gravity center position G with a certain lifting hole center of the gravity center adjusting rod 3 to form a vertical ground center line OK of the whole lifting, and leading the vertical ground center line OK to be directed into the correction surface A so as to ensure that the whole device can fall to the ground on the correction surface A after lifting; lifting a certain predicted lifting hole by using a crane lifting hook, and placing and lifting the whole stably, so that the lifting process of the iron core is completed; and then the crane hook is used for hooking the hanging plate 14 on the iron core clamping piece, the clamping screw 7 is released, the iron core is lifted off the lifting device, the iron core foot is installed, and the iron core lifting process is completed.
Example 3:
during the tilting operation, the barycenter position G of the iron core 13 and the whole support 2 is predicted by a ruler, the barycenter position G is connected with a certain lifting hole center of the barycenter adjusting rod 3 to form a vertical ground center line OK of the whole lifting, and the vertical ground center line OK points to an external turning angle to lean against the inside of the mounting surface B so as to ensure that the whole device can land on the mounting surface B after the tilting. Otherwise, the positions of the lifting holes are not selected, and the B surface cannot be landed to put down the iron core.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (3)
1. The device for standing and falling the iron core lamination of the transformer is characterized by being formed by welding a steel plate platform (1), at least two supports (2) and at least two lifting gravity center adjusting rods (3), wherein the supports (2) form a mounting surface and a correcting surface, the mounting surface and the correcting surface form 90 degrees with each other, the outer corner adopts arc transition, and the ends of the lifting gravity center adjusting rods (3) welded on the mounting surface of the supports (2) are opposite to the positions of the correcting surface; lifting gravity center adjusting rods (3) are provided with lifting plates (5) and a plurality of lifting holes, different lifting holes correspond to different lifting gravity centers, the lifting gravity center adjusting rods (3) are of square pipe structures, the height (H) of the lifting gravity center adjusting rods (3) is equal to the mounting surface length (L) tan15 degrees, 3-4 lifting holes with different lifting positions are formed in the lifting gravity center adjusting rods (3), and the 3-4 lifting holes at least comprise the following two lifting hole positions: namely, the center of gravity (G) of the whole iron core and the vertical ground center line (OK) of the lifting hook point to the lifting hole position on one side of the correcting surface after arc transition at the outer turning angle and the lifting hole position on one side of the mounting surface after arc transition at the outer turning angle; according to the gap between the iron core lower clamping piece and the mounting surface, a plurality of middle cushion blocks (10) and small cushion blocks (11) with different thicknesses are respectively arranged to enable the iron core lower clamping piece and the mounting surface to be in a horizontal state, and long cushion blocks (9) are arranged on the inner side of the correction surface; the mounting surface is provided with at least one pair of fastening nuts (6), the clamping screw rods (7) and the channel steel clamping pieces (8) form a clamping fixture of the iron core and the support (2), five channel steel clamping pieces (8), two clamping screw rods (7) and four iron core piece clamping screw rods (12) are arranged in the device, the four channel steel clamping pieces and the four iron core piece clamping screw rods (12) form the iron core fixture, the pair of fastening nuts (6), the two clamping screw rods (7) and the channel steel clamping pieces (8) form the clamping fixture of the iron core and the support (2), the support (2) adopts a square pipe structure, the arc radius of the arc transition at the outer corner of the mounting surface and the calibration surface is the pipe width of the square pipe of the support (2), and the square pipe is welded with the steel plate platform (1).
2. The using method of the device for standing and falling the iron core lamination of the transformer is characterized in that firstly, a support (2) is landed according to a mounting surface, two channel steel clamping pieces (8) are respectively placed on a steel plate platform (1), iron core lower clamping pieces are placed on the channel steel clamping pieces (8), the two channel steel clamping pieces (8) are positioned at positions which can be clamped up and down an iron core window, and a long cushion block (9) is placed on the inner side of a support correction surface; before stacking, the iron core lower clamping piece is abutted against the long cushion block (9), a middle cushion block (10) and a small cushion block (11) are respectively arranged between the iron core lower clamping piece and the mounting surface according to the gap between the iron core lower clamping piece and the mounting surface, the iron core lower clamping piece and the mounting surface are kept in a horizontal state, and then iron core sheets are stacked; when the iron core sheets are stacked, the long cushion blocks (9) on the correction surfaces are used as correction cushion blocks to keep the iron core sheets neat; after lamination, an iron core upper clamping piece and a channel steel clamping piece (8) are placed on an iron core sheet, the four channel steel clamping pieces (8) on the upper surface and the lower surface of the iron core are oppositely arranged to form two pairs of channel steel clamps, and the two pairs of channel steel clamps are clamped by an iron core sheet clamping screw rod (12); then a pair of fastening nuts (6) are selected on the steel plate platform (1), another channel steel clamping piece (8) is placed on the iron core clamping piece, the iron core (13) and the support (2) are clamped together between the pair of fastening nuts (6) and the channel steel clamping piece by using a clamping screw (7), and then the iron core standing operation is carried out; during the lifting operation, predicting the gravity center position (G) of the iron core (13) and the whole support (2) by using a ruler, connecting the gravity center position (G) with a certain lifting hole center of the gravity center adjusting rod (3) to form a vertical ground center line (OK) of the whole lifting, and leading the vertical ground center line (OK) to be directed into the correction surface (A) so as to ensure that the whole device can fall on the correction surface (A) after lifting; lifting a certain predicted lifting hole by using a crane lifting hook, and placing and lifting the whole stably, so that the lifting process of the iron core is completed; and then the crane hook is used for hooking a hanging plate (14) on the iron core clamping piece, the clamping screw rod (7) is released, the iron core is lifted off the lifting device, the iron core foot is installed, and the iron core lifting process is completed.
3. The method of using the device for raising and lowering the transformer core laminations according to claim 2, wherein the center of gravity (G) of the whole body of the core (13) and the support (2) is predicted during the lowering operation, the center of gravity (G) is connected with the center of a lifting hole of the center-of-gravity adjusting rod (3) to form a vertical ground center line (OK) for the whole body lifting, and the vertical ground center line (OK) is directed to the outer corner to lean against the mounting surface (B), so that the whole device can fall to the ground on the mounting surface (B) after the lowering operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811200601.1A CN109065350B (en) | 2018-10-16 | 2018-10-16 | Device for standing up and laying down iron core lamination of transformer and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811200601.1A CN109065350B (en) | 2018-10-16 | 2018-10-16 | Device for standing up and laying down iron core lamination of transformer and use method thereof |
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| CN109065350A CN109065350A (en) | 2018-12-21 |
| CN109065350B true CN109065350B (en) | 2023-06-02 |
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| CN112029982B (en) * | 2020-09-03 | 2022-01-28 | 江西赣电电气有限公司 | Iron core sheet annealing clamp |
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| CN109065350A (en) | 2018-12-21 |
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Effective date of registration: 20220419 Address after: 344200 Chongren County Industrial Park, Fuzhou City, Jiangxi Province Applicant after: JIANGXI GANDIAN ELECTRIC Co.,Ltd. Address before: 344200 No. 197, Yingbin Avenue (Industrial Park), Chongren County, Fuzhou City, Jiangxi Province Applicant before: JIANGXI SPECIAL TRANSFORMER WORKS |
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