CN109473264B - Oil-immersed transformer - Google Patents
Oil-immersed transformer Download PDFInfo
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- CN109473264B CN109473264B CN201811534098.3A CN201811534098A CN109473264B CN 109473264 B CN109473264 B CN 109473264B CN 201811534098 A CN201811534098 A CN 201811534098A CN 109473264 B CN109473264 B CN 109473264B
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- clamping
- low
- lead row
- voltage lead
- mounting holes
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- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000004952 Polyamide Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 239000002023 wood Substances 0.000 abstract description 13
- 229910052802 copper Inorganic materials 0.000 description 39
- 239000010949 copper Substances 0.000 description 39
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 38
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- 230000000903 blocking effect Effects 0.000 description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 241000784732 Lycaena phlaeas Species 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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Classifications
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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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention relates to an oil-immersed transformer. The oil-immersed transformer comprises a lead row fixing structure which is arranged on an upper clamping piece and used for fixing a low-voltage lead row, wherein the lead row fixing structure comprises two clamping units which are arranged on two sides of the low-voltage lead row in the front-back direction correspondingly and are clamped and tightly assembled on the low-voltage lead row through a fixed connecting structure, each clamping unit is respectively provided with a one-way clamping side face which is in top press fit with the low-voltage lead row in the front-back direction, each clamping unit is also provided with a stopping boss which is arranged on the one-way clamping side face and protrudes out of the clamping unit in the direction towards the opposite inner sides of the two clamping units, the two stopping bosses are correspondingly arranged on the left side and the right side of the low-voltage lead row, and each stopping boss is respectively provided with a stopping face which is used for stopping and. The oil-immersed transformer solves the problem of high assembly cost of the transformer caused by poor universality when the low-voltage lead row is clamped by laminated wood in the prior art.
Description
Technical Field
The invention relates to an oil-immersed transformer.
Background
An oil-filled distribution transformer is an electrical device for reducing a high network voltage to a bus voltage used by a user, and is one of important devices in a power transmission and distribution system. Chinese utility model patent that the bulletin number is CN206711729U, bulletin date is 2017.12.05 discloses a transformer low pressure lead structure for wind-powered electricity generation, including oil tank, iron core, coil, low pressure copper bar, folder and wooden piece, the low pressure copper bar is low pressure lead row promptly, and wherein the coil housing is on the iron core, and the folder centre gripping is at the iron core both ends, and low pressure lead row is drawn forth to the iron core top by the coil and is fixed on the folder by wooden piece to keep insulation distance. The wood piece and the fastening bolt for fastening the wood piece form a lead row fixing structure for fixing the low-voltage lead row.
Most of the existing wood pieces for fixing the low-voltage lead row are laminated wood, and slotted holes for fastening bolts for connecting the laminated wood to penetrate through are required to be formed in the laminated wood according to the size of the low-voltage lead row. For low-voltage lead rows with different sizes, the positions of slotted holes on laminated wood structures are different, so that the universality of the laminated wood is poor, and the slots need to be formed on the assembly site of the transformer, so that the assembly efficiency of the transformer is reduced, and the assembly cost of the transformer is increased.
Disclosure of Invention
The invention aims to provide an oil-immersed transformer, which aims to solve the problem of high assembly cost of the transformer caused by poor universality when a low-voltage lead row in the oil-immersed transformer is clamped by laminated wood in the prior art.
The oil-immersed transformer adopts the following technical scheme:
an oil-immersed transformer comprises an oil tank, an iron core arranged in the oil tank, a coil wound on the iron core, an upper clamping piece and a lower clamping piece which are clamped at the upper end and the lower end of the iron core, a low-voltage lead row which is led out to the upper part of the iron core by the coil and extends along the vertical direction, a lead row fixing structure which is arranged on the upper clamping piece and is used for fixing the low-voltage lead row, the thickness direction of the low-voltage lead row is defined as the front-back direction, the width direction of the low-voltage lead row is defined as the left-right direction, the lead row fixing structure comprises two clamping units which are arranged at the two sides of the low-voltage lead row correspondingly to the front-back direction and are fastened and assembled on the low-voltage lead row through a fixed connecting structure, each clamping unit is respectively provided with a one-way clamping side face which is in press fit with the top of the low-voltage lead row in the front-back direction, and each clamping unit is also provided with a The two stopping bosses are correspondingly arranged on the left side and the right side of the low-voltage lead row, and each stopping boss is respectively provided with a stopping surface used for being matched with the corresponding side of the low-voltage lead row in a stopping way in the left-right direction.
The invention has the beneficial effects that: the low-voltage lead row is clamped in the front-back direction through the one-way clamping side face, the low-voltage lead row is blocked in the left-right direction through the blocking boss, and the two clamping units are tightly assembled on the low-voltage lead row through the fixed connecting structure, so that the low-voltage lead row is fixed on the upper clamping piece. In addition, because the two clamping units can move relatively before being fastened and assembled, when the low-voltage lead row on the transformer is fixed, the two clamping units can be directly taken and used, and the distance between the stop surfaces on the two clamping units is adjusted according to the width of the low-voltage lead row, so that the lead row fixing structure is suitable for clamping and fixing the low-voltage lead rows with different widths, the lead row fixing structure has universality, grooving or other processing is not needed on an assembly site, and the problem of high transformer assembly cost caused by poor universality when the low-voltage lead row in the oil-immersed transformer is clamped by laminated wood in the prior art is solved.
In order to facilitate the design and processing of the clamping unit, the clamping unit is an L-shaped clamping piece, the clamping piece is provided with a transverse edge extending along the front-back direction and a vertical edge extending along the left-right direction, the one-way clamping side face is arranged on the vertical edge, and the transverse edge forms the blocking boss.
In order to further facilitate the processing of the clamping piece and ensure the mechanical property of the clamping piece, the clamping piece is integrally formed by polyamide materials.
In order to conveniently adjust the relative positions of the two clamping pieces according to the size of the low-voltage lead row, transverse edge mounting holes penetrating through the transverse edges of the two clamping pieces along the front-back direction are formed in the transverse edges of the clamping pieces, vertical edge mounting holes used for corresponding to transverse edge mounting holes in the transverse edge of the other clamping piece are formed in the vertical edges of the clamping pieces respectively, the vertical edge mounting holes are long holes extending along the left-right direction, and the fixed connecting structure comprises the vertical edge mounting holes, the transverse edge mounting holes and fastening bolts correspondingly penetrating through the transverse edge mounting holes and the vertical edge mounting holes; fastening bolts can be firstly arranged in the corresponding vertical edge mounting holes and the corresponding transverse edge mounting holes in a penetrating mode, then one of the clamping pieces is moved to enable the distance of the stop surfaces on the two clamping pieces to be matched with the width of the low-voltage lead row, then the fastening bolts are fixed, and the adjustment of the relative positions of the two clamping pieces is facilitated.
For the fixed connection who makes things convenient for lead bar fixed knot to construct with last folder, simplify lead bar fixed knot simultaneously, in this scheme go up the folder and be the channel-section steel, the notch department of channel-section steel is fixed with the strengthening rib, be equipped with on the strengthening rib and erect limit mounting hole, horizontal limit mounting hole and correspond in order to supply fastening bolt passes and then fixes two holders last folder mounting hole on last folder.
In order to ensure the structural strength of the clamping piece, the thickness of the vertical edge in the front-back direction is greater than that of the blocking boss in the front-back direction; because the one-way centre gripping side plays the main role to the tight clamp of low-voltage lead row, thereby the thickness on perpendicular limit is greater than the thickness on horizontal limit and makes the structural strength on perpendicular limit be greater than the structural strength on horizontal limit to minimize the overall size of holder, alleviate the weight of holder when guaranteeing holder structural strength.
Drawings
Fig. 1 is a schematic structural diagram of an oil-immersed transformer according to an embodiment of the present invention;
FIG. 2 is a state diagram of the two clamping members of FIG. 1 clamping the low voltage lead row;
FIG. 3 is a front view of FIG. 2;
FIG. 4 is a top view of FIG. 3;
fig. 5 is a schematic structural view of the two clamping members in fig. 2.
In the figure: 1-an iron core; 2-upper clamp piece; 3-copper bar; 4-lead row fixing structure; 5-a coil; 6-a clamping member; 7-reinforcing ribs; 8-one-way clamping side surface; 9-stopping the boss; 10-vertical edge mounting holes; 11-transverse edge mounting holes; 12-stop face.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
In an embodiment of the oil-filled transformer of the present invention, as shown in fig. 1, the oil-filled transformer includes an oil tank (not shown), an iron core 1 disposed in the oil tank, and a coil 5 wound around the iron core 1. The oil-immersed transformer further comprises an upper clamping piece 2 and a lower clamping piece which are clamped at the upper end and the lower end of the iron core 1, and a low-voltage lead row which is led out to the upper side of the iron core 1 by a coil 5 and extends along the vertical direction, wherein the low-voltage lead row is a copper bar 3. A lead bar fixing structure 4 is fixed on the upper clamping piece 2 of the oil-immersed transformer, and the copper bar 3 is clamped on the lead bar fixing structure 4 to keep an insulation distance.
As shown in fig. 2 to 5, the lead bar fixing structure 4 includes two clamping members 6 having the same structure, the thickness direction of the copper bar 3 is defined as the front-back direction, the width direction of the copper bar 3 is defined as the left-right direction, and the two clamping members 6 are disposed on two sides of the copper bar 3 corresponding to the front-back direction. The clamping piece 6 in the embodiment is L-shaped, the clamping piece 6 is provided with a transverse edge extending along the front-back direction and a vertical edge extending along the left-right direction, and the L-shaped vertical edge is provided with a one-way clamping side surface 8 which is in abutting fit with the copper bar 3 in the front-back direction; the transverse edges of the clamping pieces 6 form stop bosses 9 protruding out of the one-way clamping side surfaces 8 of the clamping pieces 6 in the direction towards the opposite inner sides of the two clamping pieces 6, the two stop bosses 9 are correspondingly arranged on the left side and the right side of the copper bar 3, and each stop boss 9 is respectively provided with a stop surface 12 in stop fit with the corresponding side of the copper bar 3. In addition, the horizontal side of each clamping piece 6 is provided with a horizontal side mounting hole 11 penetrating along the front-back direction, the vertical side of each clamping piece 6 is provided with a vertical side mounting hole 10 corresponding to the horizontal side mounting hole 11 on the horizontal side of the other clamping piece 6, and the vertical side mounting hole 10 is a long hole extending along the left-right direction. The lead bar fixing structure 4 further comprises a fastening bolt which is used for clamping the two clamping pieces 6 and is tightly assembled on the copper bar 3, and a nut screwed on the fastening bolt. The clamping piece forms a clamping unit, and the vertical edge mounting hole 10, the transverse edge mounting hole 11, the fastening bolt and the nut matched with the fastening bolt form a fixed connection structure.
In other embodiments, the low voltage lead bar may also be a conductive bar made of other materials such as aluminum bar; the clamping piece can also be in an irregular shape, and only the clamping piece is required to be provided with a one-way clamping side face and a stopping boss; the transverse edges and the vertical edges of the clamping pieces can also be arranged in a split manner, when in use, the vertical edges are fixed at proper positions of the transverse edges according to the size of the copper bar, and then the two clamping pieces are tightly assembled on the copper bar; the fastening bolt can be replaced by a screw, and the transverse edge mounting hole can be a threaded hole matched with the screw; or a nut matched with the fastening bolt is fixedly bonded on one side of the transverse edge mounting hole.
When the copper bar 3 is fixed, two clamping pieces 6 are directly taken, the two clamping pieces 6 are respectively and correspondingly placed on the front side and the rear side of the copper bar 3, and the one-way clamping side surfaces 8 on the two clamping pieces 6 are oppositely placed; then, the fastening bolt penetrates through the corresponding vertical edge mounting hole 10 and the corresponding transverse edge mounting hole 11, so that the stop surface 12 of one clamping piece 6 is in contact with one side of the copper bar 3 in the thickness direction, and the one-way clamping side surface 8 is in contact with one side of the copper bar 3 in the width direction; then, moving the other clamping piece 6 according to the width of the copper bar 3 to enable the stop surface 12 of the other clamping piece 6 to be in contact with the other side of the copper bar 3 in the thickness direction; and finally, screwing a nut on the fastening bolt to fasten and assemble the two clamping pieces 6 on the copper bar 3.
In other embodiments, the clamping pieces are not provided with vertical edge mounting holes and transverse edge mounting holes, and at the moment, after the relative positions of the two clamping pieces are determined, the two clamping pieces can be fastened and assembled on the copper bar through the binding belt; the long holes in the clamping piece can be replaced by more than two round holes which are arranged at intervals along the left-right direction, at the moment, which round hole on the vertical side is aligned with the mounting hole on the transverse side only needs to be selected according to the width of the copper bar and is fixedly connected with the copper bar through a fastening bolt, and it needs to be explained that the distance between the adjacent round holes is determined according to the width difference of the common copper bar; when the copper bar is fixed, the two clamping pieces can be placed on the front side and the rear side of the low-voltage lead bar respectively, then the relative position between the two clamping pieces is adjusted, the blocking surfaces of the two clamping pieces are in blocking fit with the left side and the right side of the low-voltage lead bar, and then the fastening bolt penetrates through the vertical edge mounting hole and the transverse edge mounting hole and fastens and assembles the two clamping pieces on the copper bar.
The copper bar 3 is clamped in the front and rear direction through the one-way clamping side face 8, the copper bar 3 is blocked in the left and right direction through the blocking boss 9, and the two clamping pieces 6 are tightly assembled on the copper bar 3 through the fixed connection structure, so that the copper bar 3 is fixed on the upper clamping piece 2. In addition, because the two clamping pieces 6 can move relatively before fixed connection, when the copper bar 3 is fixed, the two clamping pieces 6 can be directly taken and used, the distance L between the two stop surfaces 12 is adjusted according to the width of the copper bar 3, after the two clamping pieces 6 are clamped and fixed on the copper bar 3, the distance D between the two one-way clamping side surfaces 8 is equal to the thickness of the copper bar 3, the lead bar fixing structure 4 is suitable for clamping and fixing the copper bars 3 with different sizes, the lead bar fixing structure 4 has universality, slotting or other processing is not needed in an assembly field, and the problem of high assembly cost of the transformer caused by poor universality when the copper bars are clamped by laminated wood in the oil-immersed transformer in the prior art is solved.
In order to facilitate the fixed connection between the lead row fixing structure 4 and the upper clip 2, the upper clip 2 in this embodiment is a channel steel, a reinforcing rib 7 is welded at a notch of the channel steel, and the reinforcing rib 7 is provided with an upper clip mounting hole corresponding to the vertical edge mounting hole 10 and the horizontal edge mounting hole 11. Before the fastening bolt passes through the vertical edge mounting hole 10 and the transverse edge mounting hole 11 and is not fastened, the fastening bolt simultaneously passes through the upper clamping piece mounting hole, and after the positions of the two clamping pieces 6 are properly adjusted, the nut is screwed and fixed on the fastening bolt. Like this, when two holders 6 of fixed connection, be about to lead wire row fixed knot construct 4 and fix on last folder 2, not only saved and set up the special connection structure with lead wire row fixed knot construct 4 and last folder 2 fixed connection on lead wire row fixed knot construct 4 or last folder 2, made things convenient for the fixed connection of lead wire row fixed knot construct 4 and last folder 2 moreover. It should be noted that, in this embodiment, two sides of the same lead row fixing structure 4 in the left-right direction are respectively fixedly connected with two reinforcing ribs 7, that is, two reinforcing ribs 7 need to be welded on the channel steel, and each reinforcing rib 7 is provided with an upper clip mounting hole corresponding to the vertical side mounting hole 10 and the horizontal side mounting hole 11 of the same clip 6.
In addition, in order to facilitate the processing of the clamping member 6 and ensure the mechanical performance of the clamping member 6, the clamping member 6 in this embodiment is integrally injection-molded by a polyurethane material. To reduce the weight of the clamp 6, the clamp 6 in this embodiment is an external panel, internal ribbed panel structure. The lead row fixing structure 4 of the oil-immersed transformer has the following advantages: compared with laminated wood, the polyurethane material is not easy to deform, so that the clamping capacity of the clamping piece 6 is stronger, and the mechanical property is better; the clamping fixture has strong universality, the relative positions of the two clamping pieces 6 can be adjusted according to the width of the copper bar, and the clamping fixture is suitable for clamping and fixing the copper bar 3 of the oil-immersed distribution transformer with different capacities; the clamping piece 6 is made of polyamide materials insoluble in oil, and long-term stable clamping and fixing of the lead bar fixing structure 4 on the copper bar 3 are guaranteed.
In other embodiments, two sides of the same lead row fixing structure in the left-right direction can be fixedly connected with the same reinforcing rib, and the width of the reinforcing rib is larger than or equal to the size of the clamping piece in the left-right direction, so as to provide a sufficient mounting surface for the lead row fixing structure; the clamping piece can also be fixed on the reinforcing rib in a bonding or clamping manner; or a strip-shaped block can be dug on the complete polyurethane plate to form an L-shaped clamping piece; the thickness of the vertical edge may also be equal to or less than the thickness of the stop boss in the front-rear direction.
Claims (4)
1. The oil-immersed transformer is characterized in that the thickness direction of the low-voltage lead row is defined as the front-back direction, the width direction of the low-voltage lead row is defined as the left-right direction, the lead row fixing structure comprises two clamping units which are arranged on two sides of the low-voltage lead row in the front-back direction and clamped and tightly assembled on the low-voltage lead row through a fixed connecting structure, each clamping unit is respectively provided with a one-way clamping side surface which is in press fit with the top of the low-voltage lead row in the front-back direction, and each clamping unit is also provided with a one-way clamping side surface which protrudes out of the clamping unit in the direction towards the opposite inner sides of the two clamping units The two stop bosses are correspondingly arranged at the left side and the right side of the low-voltage lead row, each stop boss is respectively provided with a stop surface used for being matched with the corresponding side of the low-voltage lead row in a stop way in the left-right direction, the clamping unit is an L-shaped clamping piece which is provided with a transverse edge extending along the front-back direction and a vertical edge extending along the left-right direction, the one-way clamping side face is arranged on the vertical edge, the transverse edge forms the stopping boss, transverse edge mounting holes penetrating through the transverse edge along the front-back direction are arranged on the transverse edge of each clamping piece, vertical edge mounting holes corresponding to the transverse edge mounting holes on the transverse edge of the other clamping piece are respectively arranged on the vertical edge of each clamping piece, the vertical side mounting holes are long holes extending along the left-right direction, and the fixed connection structure comprises the vertical side mounting holes, the transverse side mounting holes and fastening bolts correspondingly penetrating through the transverse side mounting holes and the vertical side mounting holes.
2. Oil filled transformer according to claim 1, characterized in that the clamping members are integrally formed of polyamide material.
3. The oil-immersed transformer of claim 1, wherein the upper clamping piece is a channel steel, a reinforcing rib is fixed at a notch of the channel steel, and the reinforcing rib is provided with an upper clamping piece mounting hole corresponding to the vertical edge mounting hole and the horizontal edge mounting hole for the fastening bolt to pass through so as to fix the two clamping pieces on the upper clamping piece.
4. Oil filled transformer according to claim 1 or 2, characterized in that the thickness of the vertical edges in the front-to-back direction is larger than the thickness of the stop bosses in the front-to-back direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811534098.3A CN109473264B (en) | 2018-12-14 | 2018-12-14 | Oil-immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811534098.3A CN109473264B (en) | 2018-12-14 | 2018-12-14 | Oil-immersed transformer |
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| Publication Number | Publication Date |
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| CN109473264A CN109473264A (en) | 2019-03-15 |
| CN109473264B true CN109473264B (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811534098.3A Active CN109473264B (en) | 2018-12-14 | 2018-12-14 | Oil-immersed transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110198020B (en) * | 2019-05-24 | 2020-11-20 | 国家电网有限公司 | T-shaped connecting hardware fitting for tubular bus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203733591U (en) * | 2014-03-19 | 2014-07-23 | 中骏电气（泉州）有限公司 | Novel low-pressure foil coil winding oil-immersed transformer |
| CN104123883A (en) * | 2014-06-25 | 2014-10-29 | 国家电网公司 | Pluggable type pole and tower running number plate |
| CN206412642U (en) * | 2017-02-06 | 2017-08-15 | 广州市晟科电气科技有限公司 | It is a kind of to be used for the bracket of electric cabinet busbar |
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2018
- 2018-12-14 CN CN201811534098.3A patent/CN109473264B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203733591U (en) * | 2014-03-19 | 2014-07-23 | 中骏电气（泉州）有限公司 | Novel low-pressure foil coil winding oil-immersed transformer |
| CN104123883A (en) * | 2014-06-25 | 2014-10-29 | 国家电网公司 | Pluggable type pole and tower running number plate |
| CN206412642U (en) * | 2017-02-06 | 2017-08-15 | 广州市晟科电气科技有限公司 | It is a kind of to be used for the bracket of electric cabinet busbar |
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| CN109473264A (en) | 2019-03-15 |
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