CN217468228U - A lead wire fixing device for a combined on-load tap-changer tap selector - Google Patents

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

A lead wire fixing device for a combined on-load tap-changer tap selector

technical field

The utility model belongs to the technical field of electromechanical manufacturing, in particular to a lead wire fixing device for a combined on-load tap changer tap selector.

Background technique

In the existing M-type series combined on-load tap-changer, the tap selector adopts the cage-type "jacket-in" sleeve shaft structure. The inner lead is concentrated in the insulating column, and the lead is wrapped with insulating cable paper. For the three-phase combined on-load tap-changer, 6 leads are concentrated in the insulating column. In the structure without fixed leads, the 6 leads are in contact with each other, and the insulation distance is small. The insulation performance of the transformer oil is degraded (transformer oil aging, metal chips generated by mechanical running-in, etc.), and the lead wire has the risk of breakdown and short circuit, especially the combined on-load separation of high-phase and inter-stage voltages and large currents. If the switch is connected, there is a greater risk of breakdown and short circuit of the interphase and interstage leads. The leads are broken down and short-circuited. In the light, the substation will be opened, and the lines supplied by the substation will be out of power. In the severe case, the transformer of the substation will be on fire, the lines supplied by the substation will be out of power, and the transformer will be returned to the factory for maintenance, resulting in serious economic losses and negative social impacts.

The combined on-load tap-changer tap selector with higher interphase and interstage voltages and larger currents adopts a spliced structure to separate the three-phase leads. The material uses epoxy phenolic laminated glass cloth board 3240 as Support plate, nylon rods as intermediate insulating parts, epoxy glass fiber pulling rods as positioning pins. That is, three supporting plates are used to fix the contact ring, one insulating piece is used to connect it into a whole, and two pins are used to position the above-mentioned supporting plate and the insulating piece. The assembled conductive ring is then assembled in the insulating column to realize the division of three independent areas, which plays the role of isolating the interphase and interstage leads.

For example, the Chinese patent with the patent number of CN200920173986.7 discloses an insulating column that adopts the above-mentioned splicing structure to separate the three-phase leads (as shown in FIG. 1 and FIG. 2 ). The insulating column includes an insulating cylinder and a support, so The insulating cylinder is connected with the supporting member, and the supporting member specifically includes: an insulating shaft; a conductive ring; connected with the insulating cylinder; and a supporting member, which is clamped on the insulating shaft and the conductive ring. The insulating cylinder is a plurality of insulating cylinders, the support member is a plurality of support members, and the plurality of insulating cylinders are connected through the support member. It also includes a pin, which is clamped in the positioning hole of the insulating cylinder. It also includes an insulating pin, which is clamped on the insulating shaft and the supporting member. When the insulating column is used to fix the lead wire, it adopts a spliced structure. When this structure is used, 3 types of 6 parts are required. There are many types and quantities of parts, and the manufacturing cost is high. The processing efficiency is low and the assembly is complicated.

Utility model content

In view of the above problems, the purpose of the present invention is to provide a lead wire fixing device for a combined on-load tap-changer tap selector with few types of parts, low processing cost, high processing efficiency and simple assembly.

The purpose of this utility model is to realize through the following technical solutions:

A lead wire fixing device for a combined on-load tap-changer tap selector, comprising a plurality of cylindrical insulating columns that are overlapped up and down and communicated with each other, the two adjacent insulating columns are connected by a conductive contact ring, and each The inner side of the contact ring is also sleeved with a support plate, and the support plate is integrally formed by a plurality of vertically arranged insulating baffles; the middle part of the outer side of the support plate is clamped on the upper part of the inner wall of the contact ring, and the upper and lower ends of the support plate extend into the connection respectively In the insulating columns on the upper and lower sides of the contact ring, the outer edges of each insulating partition of the support plate are respectively in contact with the inner walls of the two insulating columns. Can be applied to single-phase, two-phase, three-phase combined on-load tap-changer tap selector lead fixed and different insulation grades such as A, B, C, D combined on-load tap-changer tap selection selection The device leads are fixed.

Preferably, the support plate is integrally formed by three vertically arranged insulating baffles, and its cross section is Y-shaped, which divides the insulating column into three areas, and each area is used for different potential leads inside the insulating column. isolation. The three areas are independent of each other and do not interfere with each other, so that the lead wires can exist independently in this area, and there will be no problems of mutual interference and too close distance, thus eliminating the problem of lead wire insulation breakdown. The angle between the two adjacent insulating partitions of the support plate is 120°.

Further, the outer edges of each insulating partition plate of the support plate are respectively slidably matched with the inner walls of the two insulating columns, so as to realize the movement of the support plate in the upper and lower directions, and facilitate the assembly of the support plate.

Further, the upper part of the inner side of the contact ring corresponds to each insulating baffle of the support plate to form a slot one, and the middle part of the outer side of each insulating baffle of the support plate protrudes outward to form a bump, and a lower part of the bump is formed. The one-to-one card is arranged in the first card slot, and the convex block is tightly matched with the first card slot to limit the position of the support plate and prevent it from rotating.

Further, the upper part of the protruding block protrudes upward from the upper part of the contact ring, and the lower end of the insulating column connected to the upper part of the contact ring is concave to form a second slot, which corresponds to the bump one-to-one and can snap the bump into it. Inside, the protruding block is tightly matched with the clamping groove two, which further limits the position of the support plate and prevents it from rotating.

Further, the center of the support plate is provided with a center hole penetrating the upper and lower surfaces of the support plate, and an insulating rod is sleeved in the center hole, and the insulating rod passes through the center holes of all the support plates from bottom to top.

Further, the insulating rod is slidably matched with the central hole, and the insulating rod is used for centering the support plate.

Further, the support plate and the insulating rod are all formed by one-time molding of engineering plastics, which can greatly reduce the manufacturing cost and improve the processing efficiency on the basis of ensuring the insulating performance and mechanical performance.

Further, both the support plate and the insulating rod are formed by one-time molding of unsaturated polyester glass fiber mass.

The support plate of the utility model is made of unsaturated polyester glass fiber mass-packed engineering plastics with better insulation performance, and is obtained by one-time molding by means of a molding process, and the support plate only needs to be installed on the contact ring during assembly; The board adopts the overall structure, the structure is simple, the type and quantity of parts are reduced from the original 3 kinds of 6 parts to 1 part, which can reduce the production management, save the assembly process of the spliced structure, and improve the assembly efficiency. On the basis of insulation performance and mechanical performance, it can greatly reduce the manufacturing cost and improve the processing efficiency.

Description of drawings

The present utility model will be further described in detail below in conjunction with the accompanying drawings.

1 is a schematic structural diagram of a lead wire fixing device for a combined on-load tap-changer tap selector in the prior art;

Fig. 2 is a sectional view along the A-A direction in Fig. 1;

3 is a schematic structural diagram of the lead wire fixing device for the combined on-load tap-changer tap selector according to the utility model;

Fig. 4 is a sectional view along the B-B direction in Fig. 3;

Fig. 5 is the front view of the bracket plate in the lead wire fixing device for the combined on-load tap-changer tap selector according to the utility model;

6 is a top view of a bracket plate in the lead wire fixing device for a combined on-load tap-changer tap selector according to the utility model;

As shown in the picture: 1-insulation column, 2-contact ring, 3-support plate, 301-insulation spacer, 302-bump, 4-lead.

Detailed ways

The embodiments of the present invention are described below by specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the structures, proportions, sizes, etc. drawn in the accompanying drawings of this specification are only used to cooperate with the contents disclosed in the specification for the understanding and reading of those who are familiar with this technology, and are not used to limit the conditions for the implementation of the present invention. , so it does not have technical substantive significance, any modification of the structure, the change of the proportional relationship or the adjustment of the size, without affecting the effect that the present utility model can produce and the purpose that can be achieved, should still fall within the present utility model. The disclosed technical content can cover the scope. At the same time, terms such as "up", "down", "left", "right", "middle", etc. quoted in this specification are only for the convenience of description and clarity, and are not used to limit the implementation of the present invention. The change or adjustment of the scope and its relative relationship shall also be regarded as the applicable scope of the present invention without substantially changing the technical content.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, or It can be connected integrally; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example 1:

As shown in FIG. 1 , a lead wire fixing device for a combined on-load tap-changer tap selector of the present invention includes an insulating column 1 , a contact ring 2 , and a support plate 3 .

The insulating column 1 is a plurality of cylindrical insulating structures that are stacked up and down and communicated with each other.

The contact ring 2 is also a plurality of metal conductive rings, and a conductive contact ring 2 (metal ring) is used between each adjacent two insulating columns 1 to connect, and the insulating column 1 and the contact ring 2 are connected together by pins. The contact surfaces of the insulating column 1 and the contact ring 2 are respectively provided with a plurality of pin holes, and the two ends of the pin rod are respectively inserted into the pin holes of the insulating column 1 and the contact ring 2 to realize the connection between the two.

The number of the support plates 3 is also multiple (usually an even number, such as 2, 4, 6, etc.), and a support plate 3 is sleeved on the inner side of each contact ring 2, and each support plate 3 is composed of The three vertically arranged insulating baffles 301 are integrally formed, and the cross section of the support plate 3 is Y-shaped (three sides are equal); the three insulating baffles 301 divide the interior of the insulating column 1 into three areas, each area is The insulating spacer 301 isolates the wires 4 of different potentials inside the insulating column 1 through which the wires of the same potential pass. The three areas are independent of each other and do not interfere with each other, so that the lead wires 4 exist independently in this area, and there will be no problems of mutual interference and too close distance, thereby eliminating the problem of insulation breakdown of the lead wires 4 . The included angle between the two adjacent insulating partitions 301 of the support plate 3 is 120°. The outer edge of each insulating partition 301 of the support plate 3 is slidingly matched with the inner walls of the two insulating columns 1 respectively, so as to realize the vertical movement of the support plate 3 and facilitate the assembly of the support plate 3 . The support plate 3 is obtained by one-time molding of engineering plastics (such as one of unsaturated polyester glass fiber group, ABS, nylon, polyvinyl, etc.), which can greatly reduce the insulation performance and mechanical performance on the basis of ensuring insulation performance. Manufacturing costs, improve processing efficiency.

The middle part of the outer side of the support plate 3 (the middle part of the outer edge of the insulating baffle 301 ) is clamped on the upper part of the inner wall of the contact ring 2 , and the upper and lower ends of the support plate 3 respectively extend into the insulating columns 1 connected to the upper and lower sides of the contact ring 2 . The support plate 3 The outer edges of each insulating spacer 301 are in contact with the inner walls of the two insulating columns 1 respectively.

In the upper part of the inner side of the contact ring 2 corresponding to each insulating spacer 301 of the support plate 3, a slot 1 is formed concavely, and the outer middle of each insulating spacer 301 of the support plate 3 protrudes outward to form a convex block 302. The convex block 302 is formed. The lower part of the block 302 is one-to-one clamped in the first slot, and the protruding block 302 is tightly fitted with the slot one to limit the position of the support plate 3 to prevent it from rotating. The upper part of the bump 302 protrudes upwards beyond the upper part of the contact ring 2 , and the lower end of the insulating column 1 connected to the upper part of the contact ring 2 is concave to form a second slot, which corresponds to the bump 302 one-to-one and can connect the bump 302 When snapped into it, the protruding block 302 is tightly fitted with the two locking grooves, and further limits the position of the support plate 3 to prevent it from rotating.

The utility model adopts the Y-shaped support plate 3 which is integrally formed and clamped into the contact ring 2 to realize the fixing of the lead 4 of the tap selector of the combined on-load tap-changer, so that the divided areas are independent of each other and do not interfere with each other. It is realized that the lead wires 4 exist independently in this area, and there will be no problems of mutual interference and too close distance, thereby eliminating the problem of insulation breakdown of the lead wires 4 . When assembling, the support plate 3 of the overall structure is directly clamped into the contact ring 2 and the insulating column 1, and the support plate 3, the contact ring 2 and the insulating column 1 can be connected into one body, and the partition isolation and fixation of the three-phase lead wires can be realized at the same time. , the operation is simple, the efficiency is high, and the assembly process of the spliced structure is omitted.

Example 2:

The difference between this embodiment and Embodiment 1 is:

In order to further reduce the manufacturing cost, a central hole penetrating the upper and lower surfaces of the supporting plate 3 is provided in the center (vertical) of the supporting plate 3. On the premise that the isolation effect and structural strength of the supporting plate 3 are not affected, the existence of the central hole can reduce the engineering cost. Amount of plastic used. Further, a plurality of holes or slots may be arranged vertically in the insulating partition 3 to reduce the manufacturing cost.

Example 3:

The difference between this embodiment and Embodiment 2 is:

An insulating rod is sleeved in the central hole, and the insulating rod passes through the central holes of all the support plates 3 from bottom to top. The insulating rod is slidably fitted with the central hole, and the outer diameter of the insulating rod is consistent with the inner diameter of the central hole. and firmness. The insulating rod can also be obtained by one-time molding of engineering plastics.

Other non-detailed parts of the present invention are conventional techniques known to those skilled in the art.

It should be noted that the terms "comprising", "comprising" or any other variation are intended to cover a non-exclusive inclusion such that a process, method, article or device comprising a series of elements not only includes those elements, but also includes no explicit Other elements listed, or those inherent to such a process, method, article or apparatus.

The protection scope of the present invention is not limited to the technical solutions disclosed in the specific embodiments, and any modifications, equivalent replacements, improvements, etc. made to the above embodiments according to the technical essence of the present invention 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.

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