CN217468228U - Lead fixing device for tap selector of combined on-load tap-changer - Google Patents
Lead fixing device for tap selector of combined on-load tap-changer Download PDFInfo
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- CN217468228U CN217468228U CN202221654120.XU CN202221654120U CN217468228U CN 217468228 U CN217468228 U CN 217468228U CN 202221654120 U CN202221654120 U CN 202221654120U CN 217468228 U CN217468228 U CN 217468228U
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- load tap
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Abstract
The utility model provides a lead fixing device for a tap selector of a combined on-load tap-changer, which comprises a plurality of cylindrical insulating columns which are overlapped up and down and are communicated with each other, wherein two adjacent insulating columns are connected by adopting conductive contact rings; the middle part of the outer side of the supporting plate is clamped on the upper part of the inner wall of the contact ring, the upper end and the lower end of the supporting plate respectively extend into the insulating columns connected to the upper side and the lower side of the contact ring, and the outer side edge of each insulating partition plate of the supporting plate is respectively contacted with the inner walls of the two insulating columns. The supporting plate of the utility model adopts an integral structure, has simple structure, reduces the types and the quantity of the parts from the original 3 types of 6 parts to 1 part, can reduce production management, saves the assembly process of a splicing structure and improves the assembly efficiency; by using the one-step molding process, the manufacturing cost can be greatly reduced and the processing efficiency can be improved on the basis of ensuring the insulating property and the mechanical property.
Description
Technical Field
The utility model belongs to the technical field of the electromechanical manufacturing, concretely relates to modular on-load tapping switch is lead wire fixing device for tapping selector.
Background
In the existing M-type series combined on-load tap-changer, a tap selector adopts a cage type sleeve shaft structure of 'outer sleeve inner guide'. The inner leads are concentrated in the insulating columns and wrapped by insulating cable paper. For a three-phase combined on-load tap-changer, 6 leads are distributed in an insulating column in a centralized mode, the 6 leads are in mutual contact under the structure without fixed leads, the insulating distance is small, under the action of phase-to-phase and inter-stage voltage, the leads have the risk of short circuit breakdown along with the reduction of insulating property in transformer oil (transformer oil aging, metal chips generated by mechanical running-in and the like), and particularly, the combined on-load tap-changer with higher phase-to-phase and inter-stage voltage and higher current has the risk of short circuit breakdown of the phase-to-phase and inter-stage leads. The lead wire generates breakdown and short circuit, the light causes the switching-off of the transformer substation, the power failure of the circuit supplied by the transformer substation, the heavy causes the ignition of the transformer substation, the power failure of the circuit supplied by the transformer substation, and the return of the transformer to the factory for maintenance, which causes serious economic loss and social negative influence.
The existing high interphase and interstage voltage and high current combined on-load tap-changer tapping selector lead wire fixing adopts a splicing structure to separate three-phase lead wires, an epoxy phenolic aldehyde laminated glass cloth plate 3240 is used as a supporting plate, a nylon rod is used as a middle insulating part, and an epoxy glass fiber drawing rod is used as a positioning pin. Namely, 3 supporting plates are fixed on the contact ring, 1 insulating part is used for connecting the supporting plates and the insulating part into a whole, and 2 pins are used for positioning the supporting plates and the insulating part. The assembled conducting ring is assembled in the insulating column, so that three independent areas are divided, and the function of isolating interphase and interstage leads is achieved.
For example, chinese patent No. CN200920173986.7 discloses an insulation column that is separated from three-phase leads by using the above splicing structure (as shown in fig. 1 and fig. 2), the insulation column includes an insulation cylinder and a support member, the insulation cylinder is connected to the support member, and the support member specifically includes: an insulating shaft; conducting rings; is connected with the insulating cylinder; and the supporting piece is clamped on the insulating shaft and the conducting ring. The insulating cylinder is a plurality of insulating cylinders, the support piece is a plurality of support pieces, and the plurality of insulating cylinders are connected through the support pieces. The insulating cylinder is characterized by further comprising a pin which is clamped in the positioning hole of the insulating cylinder. The insulating shaft is clamped on the supporting piece, and the insulating shaft is clamped on the supporting piece. When this insulated column fixes the lead wire, what adopt is that the concatenation formula structure promptly, and this kind of structure must use 3 kinds of 6 parts when using, and part kind, quantity are many, and manufacturing cost is high, uses the above-mentioned part of machining processing, and machining efficiency is low, assembles complicacy.
SUMMERY OF THE UTILITY MODEL
In view of the above, an object of the present invention is to provide a lead fixing device for a combined on-load tap-changer, which has the advantages of less part types, low processing cost, high processing efficiency and simple assembly.
The utility model aims at realizing through the following technical scheme:
a lead fixing device for a tap selector of a combined on-load tap changer comprises a plurality of cylindrical insulating columns which are overlapped up and down and are communicated with each other, wherein two adjacent insulating columns are connected by adopting a conductive contact ring, a supporting plate is sleeved on the inner side of each contact ring, and the supporting plate is formed by integrally forming a plurality of vertically arranged insulating partition plates; the middle part of the outer side of the supporting plate is clamped on the upper part of the inner wall of the contact ring, the upper end and the lower end of the supporting plate respectively extend into the insulating columns connected to the upper side and the lower side of the contact ring, and the outer side edge of each insulating partition plate of the supporting plate is respectively contacted with the inner walls of the two insulating columns. The lead wire fixing device can be applied to lead wire fixing of single-phase, two-phase and three-phase combined on-load tap-changer tap-selectors and lead wire fixing of different insulation grades such as A-grade, B-grade, C-grade and D-grade combined on-load tap-changer tap-changers.
Preferably, the supporting plate is formed by integrally forming three vertically arranged insulating partition plates, the cross section of the supporting plate is Y-shaped, the insulating column is divided into three areas, and each area is used for isolating different potential leads in the insulating column. The three areas are mutually independent and do not interfere with each other, so that the lead can independently exist in the area, the problems of mutual interference and too short distance can be avoided, and the problem of insulation breakdown of the lead is solved. The included angle between two adjacent insulating partition plates of the supporting plate is 120 degrees.
Furthermore, the outer side edge of each insulating partition plate of the supporting plate is in sliding fit with the inner walls of the two insulating columns respectively, so that the supporting plate can move in the vertical direction, and the supporting plate can be assembled conveniently.
Furthermore, each insulating partition plate corresponding to the supporting plate on the upper portion of the inner side of the contact ring is recessed to form a first clamping groove, the middle portion of the outer side of each insulating partition plate of the supporting plate protrudes outwards to form a protruding block, the lower portions of the protruding blocks are clamped in the first clamping grooves one to one, the protruding blocks are tightly matched with the first clamping grooves, the supporting plate is limited, and rotation of the supporting plate is prevented.
Further, lug upper portion upwards surpasss contact ring upper portion, connects and forms draw-in groove two at the insulating column lower extreme indent on contact ring upper portion, draw-in groove two and lug one to one correspond and can block the lug card into it in, lug and two tight fittings of draw-in groove further spacing to the backup pad, prevent its rotation.
Furthermore, the center of the supporting plate is provided with a center hole penetrating through the upper surface and the lower surface of the supporting plate, an insulating rod is sleeved in the center hole, and the insulating rod penetrates through the center holes of all the supporting plates from bottom to top.
Furthermore, the insulating rod is in sliding fit with the central hole, and the insulating rod is used for centering the supporting plate.
Furthermore, the supporting plate and the insulating rod are molded by engineering plastics in one step, so that the manufacturing cost can be greatly reduced and the processing efficiency can be improved on the basis of ensuring the insulating property and the mechanical property.
Furthermore, the supporting plate and the insulating rod are both obtained by mould pressing and one-step forming of unsaturated polyester glass fiber clusters.
The supporting plate of the utility model is made of unsaturated polyester glass fiber cluster molding engineering plastics with good insulating property, and is formed by one-step molding by utilizing a molding process, and the supporting plate is only required to be arranged on the contact ring during assembly; the supporting plate adopts an integral structure, the structure is simple, the types and the number of the parts are reduced from the original 3 types and 6 parts to 1 part, the production management can be reduced, the assembling process of a splicing type structure is omitted, and the assembling efficiency is improved; by using the one-step molding process, the manufacturing cost can be greatly reduced and the processing efficiency can be improved on the basis of ensuring the insulating property and the mechanical property.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a lead fixing device for a tap selector of a combined on-load tap changer in the prior art;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
fig. 3 is a schematic structural view of a lead fixing device for a tap selector of a combined on-load tap-changer according to the present invention;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;
fig. 5 is a front view of a support plate of the lead fixing device for tap selector of the combined on-load tap changer of the present invention;
fig. 6 is a top view of a support plate of the lead fixing device for tap selector of the combined on-load tap changer of the present invention;
shown in the figure: 1-insulating column, 2-contact ring, 3-support plate, 301-insulating partition plate, 302-lug and 4-lead.
Detailed Description
The embodiments of the present invention are described in detail below, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure of the present invention. The described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the drawings of the present application are only used to match the contents disclosed in the specification, so as to be known and read by those skilled in the art, and not to limit the practical limitations of the present invention, so that the present application does not have any technical significance, and any modification of the structure, change of the ratio relationship, or adjustment of the size should still fall within the scope of the present application without affecting the function and the achievable purpose of the present application. In addition, the terms such as "upper", "lower", "left", "right", "middle", etc. used in the present specification are only for convenience of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms should be construed as the scope of the present invention without substantial technical changes.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
as shown in fig. 1, the utility model discloses a modular on-load tap-changer tapping selector is with lead wire fixing device, including insulated column 1, contact ring 2, backup pad 3.
The insulating column 1 is a plurality of cylindrical insulating structures which are overlapped up and down and are communicated with each other.
The contact ring 2 is also a plurality of metal conducting rings, every two adjacent insulating columns 1 are connected through the conducting contact ring 2 (metal ring), the insulating columns 1 are connected with the contact ring 2 through pin pins through pin rods, a plurality of pin holes are formed in contact surfaces of the insulating columns 1 and the contact ring 2 respectively, and two ends of each pin rod are inserted into the pin holes of the insulating columns 1 and the contact ring 2 respectively to achieve connection of the insulating columns 1 and the contact ring 2.
The number of the supporting plates 3 is also multiple (generally even number, such as 2, 4, 6 and the like), one supporting plate 3 is sleeved on the inner side of each contact ring 2, each supporting plate 3 is formed by integrally forming three vertically arranged insulating partition plates 301, and the cross section of each supporting plate 3 is Y-shaped (three sides are equal); three insulating partition plates 301 divide the inside of the insulating column 1 into three areas, each area is used for the same equipotential lead to pass through, and the insulating partition plates 301 separate the leads 4 with different potentials in the insulating column 1. The three areas are mutually independent and do not interfere with each other, so that the lead 4 independently exists in the area, the problems of mutual interference and too short distance can be avoided, and the problem of insulation breakdown of the lead 4 is solved. The included angle between two adjacent insulating partition boards 301 of the supporting plate 3 is 120 degrees. The outer edge of each insulating partition 301 of the support plate 3 is in sliding fit with the inner walls of the two insulating columns 1 respectively so as to realize the up-and-down movement of the support plate 3 and facilitate the assembly of the support plate 3. The supporting plate 3 is formed by one-step molding of engineering plastics (such as one of unsaturated polyester glass fiber cluster, ABS, nylon, polyfurum and the like), so that the manufacturing cost can be greatly reduced and the processing efficiency can be improved on the basis of ensuring the insulating property and the mechanical property.
The middle part of the outer side of the support plate 3 (the middle part of the outer side edge of the insulating partition plate 301) is clamped on the upper part of the inner wall of the contact ring 2, the upper end and the lower end of the support plate 3 respectively extend into the insulating columns 1 connected to the upper side and the lower side of the contact ring 2, and the outer side edge of each insulating partition plate 301 of the support plate 3 is respectively contacted with the inner walls of the two insulating columns 1.
Each insulating partition plate 301 corresponding to the support plate 3 is respectively recessed at the upper part of the inner side of the contact ring 2 to form a first clamping groove, the middle part of the outer side of each insulating partition plate 301 of the support plate 3 protrudes outwards to form a convex block 302, the lower parts of the convex blocks 302 are clamped in the first clamping grooves one by one, and the convex blocks 302 are tightly matched with the first clamping grooves to limit the support plate 3 and prevent the support plate from rotating. The upper portion of the convex block 302 upwards exceeds the upper portion of the contact ring 2, the lower end of the insulating column 1 connected to the upper portion of the contact ring 2 is inwards concave to form a second clamping groove, the second clamping groove corresponds to the convex block 302 in a one-to-one mode and can clamp the convex block 302 into the second clamping groove, the convex block 302 is tightly matched with the second clamping groove, the supporting plate 3 is further limited, and rotation of the supporting plate is prevented.
The utility model discloses an integrated into one piece and card go into Y type backup pad 3 in the contact ring 2 and realize fixed to modular on-load tap changer tapping selector lead wire 4, make the regional mutual independence of branch, mutually noninterfere realizes lead wire 4 independent existence in this region, mutual interference can not appear, problem near too far to stop lead wire 4 insulation breakdown's problem. Directly during the assembly contact ring 2 and insulated column 1 with overall structure's 3 card income of backup pad, can link backup pad 3 and contact ring 2, insulated column 1 as an organic whole, realize simultaneously that the subregion to the three-phase lead wire is kept apart and is fixed easy operation, efficient, saves concatenation formula structure assembling process.
Example 2:
this example differs from example 1 in that:
for further reduction manufacturing cost, be equipped with the centre bore that link up backup pad 3 upper and lower surface at backup pad 3 central authorities (vertical), under the prerequisite that does not influence backup pad 3 isolation effect and structural strength, the existence of centre bore can reduce engineering plastics's use amount. Furthermore, a plurality of holes or grooves can be vertically arranged in the insulating partition plate 3 to reduce the manufacturing cost.
Example 3:
the present example differs from example 2 in that:
the central hole is internally sleeved with an insulating rod which penetrates through the central holes of all the supporting plates 3 from bottom to top. Insulator spindle and centre bore sliding fit, the insulator spindle external diameter is unanimous with the centre bore internal diameter, and the insulator spindle is used for centering backup pad 3, and the diversion links together all backup pads 3, promotes lead wire fixed knot to construct stability and firmness. The insulating rod can also be formed in one step by adopting engineering plastics through mould pressing.
Other parts of the utility model which are not detailed are the conventional technologies known by the technicians in the field.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The protection scope of the present invention is not limited to the technical solutions disclosed in the embodiments, and any modifications, equivalent replacements, improvements, etc. made by the technical entities of the present invention to the above embodiments all fall into the protection scope of the present invention.
Claims (10)
1. The utility model provides a modular on-load tap-changer tapping selector is with lead wire fixing device, includes a plurality of cylindric insulated columns that overlap from top to bottom and communicate each other, adopts electrically conductive contact ring to connect between two adjacent insulated columns, still overlaps at every contact ring inboard and is equipped with backup pad, its characterized in that: the supporting plate is formed by integrally forming a plurality of vertically arranged insulating partition plates; the middle part of the outer side of the supporting plate is clamped on the upper part of the inner wall of the contact ring, the upper end and the lower end of the supporting plate respectively extend into the insulating columns connected to the upper side and the lower side of the contact ring, and the outer side edge of each insulating partition plate of the supporting plate is respectively contacted with the inner walls of the two insulating columns.
2. The lead attachment arrangement for a tap selector of a modular on-load tap changer according to claim 1, wherein: the supporting plate is formed by integrally forming three vertically arranged insulating partition plates, and the cross section of the supporting plate is Y-shaped.
3. The lead attachment arrangement for a tap selector of a modular on-load tap changer according to claim 2, wherein: the included angle between two adjacent insulating partition plates of the supporting plate is 120 degrees.
4. The lead attachment arrangement for a tap selector of a modular on-load tap changer according to claim 1, wherein: the outer edge of each insulating partition plate of the supporting plate is in sliding fit with the inner walls of the two insulating columns respectively.
5. The lead attachment arrangement for a tap selector of a modular on-load tap changer according to claim 1, wherein: and the upper part of the inner side of the contact ring, which corresponds to each insulating partition plate of the support plate, is respectively concave inwards to form a first clamping groove, the middle part of the outer side of each insulating partition plate of the support plate is convex outwards to form a convex block, and the lower parts of the convex blocks are clamped in the first clamping grooves one by one.
6. The lead attachment arrangement for a tap selector of a modular on-load tap changer of claim 5, wherein: the upper portion of the convex block upwards exceeds the upper portion of the contact ring, the lower end of the insulating column connected to the upper portion of the contact ring is inwards concave to form a second clamping groove, and the second clamping groove corresponds to the convex block one to one and can clamp the convex block into the second clamping groove.
7. Lead attachment for a tap selector of a combined on-load tap changer according to any of claims 1-6, characterized in that: the center of the supporting plate is provided with a center hole which runs through the upper surface and the lower surface of the supporting plate.
8. The lead attachment arrangement for a tap selector of a modular on-load tap changer of claim 7, wherein: an insulating rod is sleeved in the central hole and penetrates through the central holes of all the supporting plates from bottom to top; the insulating rod is in sliding fit with the central hole.
9. The lead attachment arrangement for a tap selector of a modular on-load tap changer of claim 7, wherein: the supporting plate and the insulating rod are both obtained by one-step molding of engineering plastics.
10. The lead attachment arrangement for a tap selector of a modular on-load tap changer of claim 9, wherein: the supporting plate and the insulating rod are both obtained by mould pressing and one-step forming of unsaturated polyester glass fiber clusters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221654120.XU CN217468228U (en) | 2022-06-30 | 2022-06-30 | Lead fixing device for tap selector of combined on-load tap-changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221654120.XU CN217468228U (en) | 2022-06-30 | 2022-06-30 | Lead fixing device for tap selector of combined on-load tap-changer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217468228U true CN217468228U (en) | 2022-09-20 |
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ID=83238949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221654120.XU Active CN217468228U (en) | 2022-06-30 | 2022-06-30 | Lead fixing device for tap selector of combined on-load tap-changer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217468228U (en) |
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2022
- 2022-06-30 CN CN202221654120.XU patent/CN217468228U/en active Active
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