CN211427957U

CN211427957U - Cementing flange of transformer bushing

Info

Publication number: CN211427957U
Application number: CN201922384084.4U
Authority: CN
Inventors: 孙荣升; 刘立宝; 姚越; 刘敏
Original assignee: Nanjing Electric High Voltage Bushing Co ltd
Current assignee: Nanjing Electric High Voltage Bushing Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-09-04
Anticipated expiration: 2029-12-26

Abstract

The utility model discloses a cementing flange of transformer bushing, including transformer bushing core and cementing flange, the outer periphery of transformer bushing core is formed with the stair structure, the inner circumferential surface of cementing flange is formed with the stair face with transformer bushing core stair structure complex, cementing flange embolias transformer bushing core to the upper end direction from the lower extreme of transformer bushing core stair structure, and the joint is in the stair structure department of transformer bushing core, be provided with upper end O type sealing washer and lower extreme O type sealing washer between transformer bushing core and the transformer bushing core of stair structure lower extreme on the inner circumferential surface of cementing flange and the transformer bushing core of stair structure upper end respectively; the utility model discloses make transformer bushing's flange mounting more reliable and more stable, the sealing washer is not fragile, and the assembly process is simple convenient, has guaranteed that the core can not have the risk that drops when transformer bushing is in the operation, has improved transformer bushing mechanical properties's stability greatly.

Description

Cementing flange of transformer bushing

Technical Field

The utility model relates to a structural design of transformer bushing's mucilage binding flange especially relates to a transformer bushing's mucilage binding flange, belongs to transformer bushing technical field.

Background

At present, the structural design mode of a transformer bushing flange is mainly that a flange is sleeved from the air end of a transformer bushing core, because the sealing requirement is met by compressing two O-shaped sealing rings between the flange and the core, and meanwhile, the flange and the core are fixed by bonding through epoxy resin glue, in order to enable the flange and the core to be bonded more firmly, a plurality of grooves are added on the bonding surface of the core and the flange; because the diameters of the sealing surfaces of the two sealing rings and the core body with the grooves are consistent, when the flange is installed, one sealing ring needs to pass through the sealing surface of the other sealing ring and the core body groove, so that the sealing ring is extremely easy to damage and is difficult to find; and the transformer bushing is that the air end is up when using, receives long-term vibrations and the ageing influence of epoxy glue, if take place to become flexible between flange and the core has the risk of droing.

Disclosure of Invention

For solving prior art's is not enough, the utility model provides a transformer bushing's mucilage binding flange makes transformer bushing's flange mounting more reliable and more stable, and the sealing washer is not fragile, and assembly process is simple convenient, has guaranteed that the core can not have the risk that drops when transformer bushing is in the operation, has improved transformer bushing mechanical properties's stability greatly.

The utility model discloses the technical scheme who adopts does:

the utility model provides a transformer bushing's mucilage binding flange, includes transformer bushing core and mucilage binding flange, the mucilage binding flange cup joints on transformer bushing core, the outer periphery of transformer bushing core is formed with the stair structure, and the transformer bushing core diameter of stair structure upper end is greater than the transformer bushing core diameter of stair structure lower extreme, the interior circumference of mucilage binding flange is formed with the step face with transformer bushing core stair structure complex, the mucilage binding flange embolias transformer bushing core to the upper end direction from the lower extreme of transformer bushing core stair structure to the joint is in the stair structure department of transformer bushing core, is provided with upper end O type sealing washer and lower extreme O type sealing washer respectively between the transformer bushing core of stair structure upper end and the transformer bushing core of stair structure lower extreme of mucilage binding flange.

As the utility model discloses a further preferred, the mucilage binding flange fill the epoxy glue through the inner chamber of lower extreme screw hole between to mucilage binding flange and the transformer bushing core, the upper end screw hole of mucilage binding flange is used for the exhaust, fills to glue and accomplishes the upper end screw hole and the lower extreme screw hole of back reuse hexagon socket head holding screw to the mucilage binding flange and seal.

As the utility model discloses a further preferred, the transformer bushing core of stair structure upper end and the outer periphery straight radial stair structure lower extreme one side that the mucilage binding flange corresponds steadilys decrease gradually.

As a further preferred aspect of the present invention, a plurality of grooves extending along the length direction of the transformer bushing core are formed on the outer circumferential surface of the transformer bushing core at the upper end of the step structure corresponding to the glue flange, and epoxy resin glue is filled in the grooves; the transformer bushing core body is bonded with the glue flange more firmly.

The beneficial effects of the utility model reside in that: the flange mounting of the transformer bushing is more stable and reliable, the sealing ring is not easy to damage, the assembly process is simple and convenient, the risk that the core body of the transformer bushing drops when the transformer bushing is operated is avoided, and the stability of the mechanical performance of the transformer bushing is greatly improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the outer circumferential surface of the transformer bushing core body at the upper end of the step structure corresponding to the cementing flange of the utility model;

the main reference numerals in the figures have the following meanings:

1-transformer bushing core, 2-upper end O-shaped sealing ring, 3-inner hexagonal flat end set screw, 4-epoxy resin glue, 5-lower end O-shaped sealing ring, 6-cementing flange, 7-step structure and 8-groove.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2: the embodiment is a glue flange of a transformer bushing, which comprises a transformer bushing core 1 and a glue flange 6, wherein the glue flange 6 is sleeved on the transformer bushing core 1, a step structure 7 is formed on the outer circumferential surface of the transformer bushing core 1, the diameter of the transformer bushing core 1 at the upper end of the step structure 7 is larger than that of the transformer bushing core 1 at the lower end of the step structure 7, a step surface matched with the step structure 7 of the transformer bushing core 1 is formed on the inner circumferential surface of the glue flange 6, the glue flange 6 is sleeved into the transformer bushing core 1 from the lower end of the step structure 7 of the transformer bushing core 1 to the upper end direction, and the joint is in the stair structure 7 department of transformer bushing core 1, is provided with upper end O type sealing washer 2 and lower extreme O type sealing washer 5 between the transformer bushing core 1 of cementing flange 6's inner peripheral face and stair structure 7 upper end and the transformer bushing core 1 of stair structure 7 lower extreme respectively.

The cementing flange 6 in this embodiment fills the epoxy glue 4 into the inner cavity between the cementing flange 6 and the transformer bushing core 1 through the lower threaded hole, the upper threaded hole of the cementing flange 6 is used for exhausting, and the upper threaded hole and the lower threaded hole of the cementing flange 6 are sealed by the hexagon socket flat end set screw 3 after the glue filling is completed.

In this embodiment, the outer circumferential surface of the transformer bushing core 1 at the upper end of the stepped structure 7 corresponding to the glue flange 6 is directly decreased gradually toward one side of the lower end of the stepped structure 7.

In the embodiment, a plurality of grooves 8 extending along the length direction of the transformer bushing core 1 are formed on the outer circumferential surface of the transformer bushing core 1 at the upper end of the step structure 7 corresponding to the glue flange 6, and epoxy resin glue 4 is filled in the grooves 8; the transformer bushing core body 1 and the cementing flange 6 are bonded more firmly.

In the present embodiment, during assembly, the adhesive flange 6 is firstly sleeved from the lower end of the transformer bushing core 1 to the upper end, because the O-ring seals at the upper and lower ends adopt different diameter sizes, the diameter of the O-ring seal 2 at the upper end is larger than that of the O-ring seal 5 at the lower end, and the adhesive positions of the transformer bushing core 1 and the adhesive flange 6 adopt different diameter sizes, the transformer bushing core 1 at the upper end of the step structure 7 and the outer circumferential surface of the adhesive flange 6 corresponding to the step structure are gradually decreased toward one side of the lower end of the step structure 7; when the upper-end O-shaped sealing ring 2 passes through the sealing surface of the lower-end O-shaped sealing ring 5 and the cementing positions of the transformer bushing core 1 and the cementing flange 6, the upper-end O-shaped sealing ring 2 cannot contact the sealing surface of the lower-end O-shaped sealing ring 5 and the groove 8 of the transformer bushing core 1, so that the O-shaped sealing rings at two ends are not easy to damage, and the good sealing performance of the O-shaped sealing rings at two ends is ensured; the gluing position structures of the transformer bushing core 1 and the gluing flange 6 are changed, so that more epoxy resin glue 4 can be filled; the glue flange 6 and the transformer bushing core 1 are positioned by the step structure 7, so that the risk that the core falls off when the transformer bushing operates is avoided, and the stability of the mechanical performance of the transformer bushing is greatly improved; simultaneously, this kind of mounting structure can directly be tested transformer bushing after transformer bushing assembly is accomplished, need not to fill epoxy glue 4 earlier, and the gluey processing is filled again after the experimental qualification of isoelectrical property, has also improved transformer bushing assembly work's convenience like this greatly.

The utility model discloses make transformer bushing's flange mounting more reliable and more stable, the sealing washer is not fragile, and the assembly process is simple convenient, has guaranteed that the core can not have the risk that drops when transformer bushing is in the operation, has improved transformer bushing mechanical properties's stability greatly.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a transformer bushing's mucilage binding flange which characterized in that: the transformer bushing core body is sleeved with the glue flange, a step structure is formed on the outer circumferential surface of the transformer bushing core body, the diameter of the transformer bushing core body at the upper end of the step structure is larger than that of the transformer bushing core body at the lower end of the step structure, a step surface matched with the step structure of the transformer bushing core body is formed on the inner circumferential surface of the glue flange, the glue flange is sleeved into the transformer bushing core body from the lower end of the step structure of the transformer bushing core body to the upper end direction and is clamped at the step structure of the transformer bushing core body, and an upper end O-shaped sealing ring and a lower end O-shaped sealing ring are respectively arranged between the inner circumferential surface of the glue flange and the transformer bushing core body at the upper end of the step structure and the transformer bushing core.

2. The adhesive flange of the transformer bushing according to claim 1, wherein the adhesive flange fills an inner cavity between the adhesive flange and the transformer bushing core with epoxy resin adhesive through a lower threaded hole, the upper threaded hole of the adhesive flange is used for exhausting air, and the upper threaded hole and the lower threaded hole of the adhesive flange are sealed by an inner hexagonal flat end set screw after the adhesive filling is completed.

3. The flanges of claim 1 or 2, wherein the core of the transformer bushing at the upper end of the step structure and the corresponding outer circumference of the flange gradually decrease toward the lower end of the step structure.

4. The flanges of claim 3, wherein a plurality of grooves extending along a length direction of the core are formed on an outer circumferential surface of the core of the transformer bushing at an upper end of the step structure corresponding to the flanges, and epoxy resin is filled in the grooves.