CN111540584A - 500kV antidetonation type level power transformer shaping lead clamping structure - Google Patents
500kV antidetonation type level power transformer shaping lead clamping structure Download PDFInfo
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- CN111540584A CN111540584A CN202010511272.3A CN202010511272A CN111540584A CN 111540584 A CN111540584 A CN 111540584A CN 202010511272 A CN202010511272 A CN 202010511272A CN 111540584 A CN111540584 A CN 111540584A
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- lead
- fixed
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- bottom bar
- supporting bottom
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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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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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
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention relates to a 500kV anti-seismic type grade power transformer forming lead clamping structure, and belongs to the technical field of transformers. The technical scheme is as follows: the forming lead (13) is L-shaped and consists of a horizontal section and a vertical end, the horizontal section penetrates into the body screen (14), and the vertical section penetrates into the pressure equalizing ball (8) of the sleeve (7); the supporting bottom bar A (10) is fixed on the main frame corresponding to the vertical section of the formed lead wire (13), and the vertical section of the formed lead wire (13) is fixed on the supporting bottom bar A (10) through a vertical section fixing lead clamp (9); the supporting bottom bar B (12) is fixed on the main frame corresponding to the horizontal section of the formed lead, and the horizontal section of the formed lead is fixed on the supporting bottom bar B through a horizontal section fixing lead clamp (11). The invention can meet the requirement of the part on the electrical insulation strength, can provide enough mechanical strength and ensures that the high-voltage lead can be firmly fixed in the case of short-circuit fault.
Description
Technical Field
The invention relates to a 500kV anti-seismic type grade power transformer forming lead clamping structure, and belongs to the technical field of transformers.
Background
In a large-scale power transformer, the requirement of an anti-seismic test is more and more strict as a special test, and the anti-seismic performance of each power grid on 500 kV-grade products also begins to generally require. Because the leakage magnetic field is very strong when short circuit fault occurs, the current is very large, the coil and the lead wire can bear very large electrodynamic force, if the mechanical strength of the transformer is not enough, the coil, the lead wire and the like can be seriously deformed or even damaged, so that serious transformer accidents are caused, and loss which can not be estimated is brought. Therefore, an important index for designing the anti-vibration transformer is mechanical strength and stability.
A high-voltage lead of a 500 kV-level power transformer is generally designed by adopting a formed lead, a common structure is that a copper braided wire with a proper sectional area is adopted to connect a coil original wire and a sleeve oil side terminal according to a current value, and an L-shaped aluminum pressure equalizing tube is covered outside the copper braided wire. One end of the aluminum pressure equalizing pipe penetrates into the body screen, and the other end of the aluminum pressure equalizing pipe penetrates into the sleeve pressure equalizing ball. And the aluminum equalizing pipe is externally wound by alternately placing supporting strips and insulating paperboards to a proper thickness. Because the aluminum pressure equalizing pipe is large in size, firm and reliable clamping is needed in the middle part to prevent displacement and damage when short circuit faults occur. The clamping mode is difficult to meet the requirement on the anti-vibration performance, and a new reliable clamping mode needs to be designed.
Disclosure of Invention
The invention aims to provide a 500kV anti-seismic type grade power transformer formed lead clamping structure, which can meet the requirement of electrical insulation strength, can provide enough mechanical strength, ensures that a high-voltage lead can be firmly fixed during short circuit fault, and solves the problems in the background technology.
The technical scheme of the invention is as follows:
a500 kV anti-seismic type grade power transformer forming lead clamping structure comprises an upper transformer clamping piece, a long transverse lead clamp, vertical bars, a short transverse lead clamp, a reinforcing lead clamp, a vertical section fixing lead clamp, a supporting bottom bar A, a horizontal section fixing lead clamp, a supporting bottom bar B, a forming lead and a lower transformer clamping piece, wherein the two vertical bars are connected together through a plurality of reinforcing lead clamps which are arranged up and down to form a main frame; the forming lead is L-shaped and consists of a horizontal section and a vertical end, the horizontal section penetrates into the surrounding screen of the transformer body, and the vertical section penetrates into the pressure equalizing ball of the sleeve; the supporting bottom bar A is fixed on the main frame corresponding to the vertical section of the formed lead, and the vertical section of the formed lead is fixed on the supporting bottom bar A through a vertical section fixing lead clamp; the supporting bottom bar B is fixed on the main frame corresponding to the horizontal section of the formed lead, and the horizontal section of the formed lead is fixed on the supporting bottom bar B through a horizontal section fixing lead clamp; the vertical section fixed conductor clamp and the horizontal section fixed conductor clamp are both U-shaped and matched with the forming lead.
An upper fixing plate and a lower fixing plate are respectively arranged on the upper clamping piece and the lower clamping piece of the transformer, one ends of a long transverse wire clamp and a short transverse wire clamp at the upper end of the main frame are fixed on the upper fixing plate through metal fasteners, and the other ends of the long transverse wire clamp and the short transverse wire clamp at the upper end of the main frame are respectively fixed at the upper ends of the two vertical bars through insulating fasteners; one ends of the long transverse wire clamp and the short transverse wire clamp at the lower end of the main frame are fixed on the lower fixing plate through metal fasteners, and the other ends of the long transverse wire clamp and the short transverse wire clamp at the lower end of the main frame are respectively fixed at the lower ends of the two vertical bars through insulating fasteners.
The two ends of the supporting bottom bar A are respectively fixed on the two vertical bars through an insulating fastener, the two ends of the supporting bottom bar B are respectively fixed on the two vertical bars through an insulating fastener, and the supporting bottom bar A is located above the supporting bottom bar B.
The vertical bar is made of laminated paperboards.
The invention has the beneficial effects that: the requirement of the part on the electrical insulation strength can be met, sufficient mechanical strength can be provided, and the high-voltage lead can be firmly fixed during short circuit fault.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a sectional view taken along line F of FIG. 1;
FIG. 3 is a cross-sectional view taken along line Q of FIG. 1;
in the figure: 1. a clamping piece is arranged on the transformer; 2. an upper fixing plate; 3. a long transverse wire clamp; 4. erecting a bar; 5. a short transverse wire clamp; 6. reinforcing the wire clamp; 7. a sleeve; 8. a sleeve pressure equalizing ball; 9. the vertical section fixes the wire clamp; 10. a bottom bar A is supported; 11. forming a lead fixing wire clamp; 12. a bottom bar B is supported; 13. forming a lead; 14. a body screen; 15. an insulating screw and a nut; 16. a lower clamping piece of the transformer; 17. and a lower fixing plate.
Detailed Description
The invention is further illustrated by way of example in the following with reference to the accompanying drawings.
Referring to the attached drawings 1-3, a 500kV anti-seismic type grade power transformer formed lead clamping structure comprises an upper transformer clamping piece 1, a long transverse lead clamp 3, upright bars 4, short transverse lead clamps 5, reinforced lead clamps 6, a vertical section fixed lead clamp 9, a supporting bottom bar A10, a horizontal section fixed lead clamp 11, a supporting bottom bar B12, a formed lead 13 and a lower transformer clamping piece 16, wherein the two upright bars 4 are connected together through a plurality of vertically arranged reinforced lead clamps 6 to form a main frame, the upper end of the main frame is fixed on the upper transformer clamping piece 1 through one long transverse lead clamp 3 and one short transverse lead clamp 5, and the lower end of the main frame is fixed on the lower transformer clamping piece 16 through one long transverse lead clamp 3 and one short transverse lead clamp 5; the forming lead 13 is L-shaped and consists of a horizontal section and a vertical end, wherein the horizontal section penetrates into the body enclosure 14, and the vertical section penetrates into the pressure equalizing ball 8 of the sleeve 7; the supporting bottom bar A10 is fixed on the main frame corresponding to the vertical section of the formed lead 13, and the vertical section of the formed lead 13 is fixed on the supporting bottom bar A10 through the vertical section fixing lead clamp 9; the supporting bottom bar B12 is fixed on the main frame corresponding to the horizontal section of the formed lead 13, and the horizontal section of the formed lead 13 is fixed on the supporting bottom bar B12 through the horizontal section fixing lead clamp 11; the vertical section fixed conductor clamp 9 and the horizontal section fixed conductor clamp 11 are both U-shaped and matched with the forming lead 13.
An upper fixing plate and a lower fixing plate are respectively arranged on the transformer upper clamping piece 1 and the transformer lower clamping piece 16, one ends of a long transverse wire clamp and a short transverse wire clamp at the upper end of the main frame are fixed on the upper fixing plate through metal fasteners, and the other ends of the long transverse wire clamp and the short transverse wire clamp at the upper end of the main frame are respectively fixed at the upper ends of the two vertical bars through insulating fasteners; one ends of the long transverse wire clamp and the short transverse wire clamp at the lower end of the main frame are fixed on the lower fixing plate through metal fasteners, and the other ends of the long transverse wire clamp and the short transverse wire clamp at the lower end of the main frame are respectively fixed at the lower ends of the two vertical bars through insulating fasteners.
Two ends of the supporting bottom bar A10 are respectively fixed on the two vertical bars through an insulating fastener, two ends of the supporting bottom bar B12 are respectively fixed on the two vertical bars through an insulating fastener, and the supporting bottom bar A10 is positioned above the supporting bottom bar B12.
The specific embodiment is as follows:
in this embodiment, as shown in fig. 1-3, the upright bars 4 of the present invention use laminated paper boards as main materials, the cross sections of the two upright bars 4 are both 50-70 mm × 70-100 mm (thickness × width), and the specific value is determined according to the transformer capacity. The cross-sectional thickness x height of the long transverse wire clamp 3 and the short transverse wire clamp 5 is: 50-70 mm x 70-100 mm, and the thickness x height of the cross section of the reinforced lead clamp 6 is 50mm x 50-70 mm, so as to enhance the stability of the main frame.
The cross section of the supporting bottom bar B12 corresponding to the horizontal section of the L-shaped molded lead 13 is Z-shaped with the thickness of 50mm multiplied by 50-70 mm (thickness multiplied by height). The formed lead fixing lead clamp 11 is in an omega shape, and the formed lead 13 is fixed on the main frame through the formed lead fixing lead clamp 11.
The cross section of the supporting bottom bar A10 corresponding to the vertical section of the L-shaped forming lead 13 is Z-shaped with the thickness of 50mm multiplied by 50-70 mm (thickness multiplied by height), and the vertical section fixing lead clamp 9 is U-shaped with the thickness of 10-30 mm.
The lengths of the two vertical bars 4 are determined according to the height of an iron core window and a transformer arrangement scheme, the upper end and the lower end of one vertical bar are respectively welded on an upper fixing plate 2 and a lower fixing plate 17 of an upper clamping piece 1 and a lower clamping piece 16 of a transformer by using two long transverse wire clamps 3, the two long transverse wire clamps 3 are connected with the upper fixing plate 2 and the lower fixing plate 7 by using two sets of metal fasteners, and the two long transverse wire clamps 3 are connected with the upper end and the lower end of the vertical bar by using four sets of insulating fasteners. The upper end and the lower end of the other vertical bar are respectively welded on the other upper fixing plate 2 and the lower fixing plate 7 of the upper clamping piece 1 of the transformer and the lower clamping piece 16 of the transformer through two short transverse wire clamps 5, the two short transverse wire clamps 5 are connected with the upper fixing plate 2 and the lower fixing plate 7 through two sets of metal fasteners, and the two short transverse wire clamps 5 are connected with the upper end and the lower end of the vertical bar through four sets of insulating fasteners.
The lower ends of the two vertical bars are provided with 10mm grooves at the joints of the long horizontal wire clamp 3 and the short horizontal wire clamp 5 so as to firmly fix the vertical bars to prevent sinking.
Two upright bars are at the distance of 500mm of every interval in the direction of height, increase a reinforcement wire clamp 6, and the contact department of upright bar and reinforcement wire clamp 6 is opened has 10 mm's recess to reinforcement wire clamp 6 card is in the recess of upright bar, increases the steadiness of main frame.
The horizontal section of the shaped lead 13 penetrates into the body screen 14 and the vertical section penetrates into the pressure-equalizing ball 8 of the bushing 7.
The vertical section fixed lead clamp 11 is in a U shape matched with the formed lead 13, the vertical section fixed lead clamp 11 is fixed on a supporting bottom bar B12 through two sets of insulating screw rods and nuts, and two ends of the supporting bottom bar B12 are fixed in a10 mm groove of the vertical bar through two sets of insulating screw rods and nuts. The horizontal section fixed lead clamp 9 is U-shaped, the horizontal section fixed lead clamp 9 is fixed on a support bottom bar A10 through two sets of insulating screw rods and nuts, and two ends of the support bottom bar A10 are fixed in 10mm grooves of the vertical bar through two sets of insulating screw rods and nuts. Because the two upright bars, the supporting bottom bar A10 and the supporting bottom bar B12 need to be provided with holes along the direction vertical to the laminating direction of the paper boards, in order to prevent the cracking phenomenon after drying, riveting is needed to be carried out along the laminating direction of the paper boards at the positions of about 50mm of two sides of the holes.
The invention is different from the common fixing mode of the formed lead on the transformer body, and adopts a frame structure made of paper pressing plates to be directly fixed on the firmest iron core upper and lower clamping pieces in the oil tank. By reasonably designing the dimensions of the parts, a good combination of electrical insulation strength and mechanical strength is achieved, achieving the original object of the invention.
Claims (4)
1. The utility model provides a 500kV antidetonation type level power transformer shaping lead wire clamping structure which characterized in that: the transformer lead-in structure comprises an upper transformer clamping piece (1), long transverse lead clamps (3), vertical bars (4), short transverse lead clamps (5), a reinforcing lead clamp (6), vertical section fixing lead clamps (9), a supporting bottom bar A (10), horizontal section fixing lead clamps (11), a supporting bottom bar B (12), a forming lead (13) and a lower transformer clamping piece (16), wherein the two vertical bars (4) are connected together through a plurality of reinforcing lead clamps (6) arranged up and down to form a main frame, the upper end of the main frame is fixed on the upper transformer clamping piece (1) through one long transverse lead clamp (3) and one short transverse lead clamp (5), and the lower end of the main frame is fixed on the lower transformer clamping piece (16) through one long transverse lead clamp (3) and one short transverse lead clamp (5); the forming lead (13) is L-shaped and consists of a horizontal section and a vertical end, the horizontal section penetrates into the body screen (14), and the vertical section penetrates into the pressure equalizing ball (8) of the sleeve (7); the supporting bottom bar A (10) is fixed on the main frame corresponding to the vertical section of the formed lead wire (13), and the vertical section of the formed lead wire (13) is fixed on the supporting bottom bar A (10) through a vertical section fixing lead clamp (9); the supporting bottom bar B (12) is fixed on the main frame corresponding to the horizontal section of the formed lead (13), and the horizontal section of the formed lead (13) is fixed on the supporting bottom bar B (12) through a horizontal section fixing lead clamp (11); the vertical section fixed conductor clamp (9) and the horizontal section fixed conductor clamp (11) are both U-shaped and matched with the forming lead (13).
2. The formed lead clamping structure of the 500kV earthquake-resistant class power transformer according to claim 1, characterized in that: an upper fixing plate (2) and a lower fixing plate (17) are respectively arranged on the transformer upper clamping piece (1) and the transformer lower clamping piece (16), one ends of a long transverse wire clamp and a short transverse wire clamp at the upper end of the main frame are fixed on the upper fixing plate through metal fasteners, and the other ends of the long transverse wire clamp and the short transverse wire clamp at the upper end of the main frame are respectively fixed at the upper ends of the two vertical bars through insulating fasteners; one ends of the long transverse wire clamp and the short transverse wire clamp at the lower end of the main frame are fixed on the lower fixing plate through metal fasteners, and the other ends of the long transverse wire clamp and the short transverse wire clamp at the lower end of the main frame are respectively fixed at the lower ends of the two vertical bars through insulating fasteners.
3. The formed lead clamping structure of 500kV earthquake-resistant class power transformer according to claim 1 or 2, characterized in that: the two ends of the supporting bottom bar A (10) are fixed on the two vertical bars through the insulating fasteners, the two ends of the supporting bottom bar B (12) are fixed on the two vertical bars through the insulating fasteners, and the supporting bottom bar A (10) is located above the supporting bottom bar B (12).
4. The formed lead clamping structure of the 500kV earthquake-resistant class power transformer according to claim 1, characterized in that: the vertical bar is made of laminated paperboards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010511272.3A CN111540584A (en) | 2020-06-08 | 2020-06-08 | 500kV antidetonation type level power transformer shaping lead clamping structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010511272.3A CN111540584A (en) | 2020-06-08 | 2020-06-08 | 500kV antidetonation type level power transformer shaping lead clamping structure |
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| Publication Number | Publication Date |
|---|---|
| CN111540584A true CN111540584A (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010511272.3A Pending CN111540584A (en) | 2020-06-08 | 2020-06-08 | 500kV antidetonation type level power transformer shaping lead clamping structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113611502A (en) * | 2021-07-23 | 2021-11-05 | 保定天威保变电气股份有限公司 | High-voltage integrated outgoing line arrangement method for 500kV three-phase transformer |
-
2020
- 2020-06-08 CN CN202010511272.3A patent/CN111540584A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113611502A (en) * | 2021-07-23 | 2021-11-05 | 保定天威保变电气股份有限公司 | High-voltage integrated outgoing line arrangement method for 500kV three-phase transformer |
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