CN207282301U - A kind of poured with epoxy resin has with dry transformer pouring mould - Google Patents

Abstract

The utility model provides a kind of poured with epoxy resin to be had with dry transformer pouring mould, it includes external mold, panel, the external mold is equipped with curved slab and the first bending plate formed positioned at the curved slab both ends successively bending, second bending plate, the panel includes mainboard and the side wall positioned at the mainboard both ends, when the mainboard is welded with multiple taps, the large end face of the tap is concordant with the mainboard, the height of the side wall is not less than the height of first bending plate, First Transition curved surface is formed between the truncated cone-shaped endoporus and the large end face of the tap, the range of taper of the endoporus is 0.4 0.5, the endoporus is equipped with fiberglass gridding cloth, in casting epoxy resin, the fiberglass gridding cloth is filled in the endoporus in the epoxy resin of conducting wire surrounding.The utility model dry transformer pouring mould tool is easy to crack present on existing dry transformer pouring body to solve the problems, such as.

Description

A kind of poured with epoxy resin has with dry transformer pouring mould

Technical field

Technical field of transformer production is the utility model is related to, specifically, a kind of poured with epoxy resin dry type transformation The structure of device casting mold is improved.

Background technology

At present, the casting mold of dry transformer pouring body is formed using poured with epoxy resin, generally comprises external mold, interior Mould, upper end cover, bottom end cover and panel etc., panel are welded with multiple taps, have on tap connection truncated cone-shaped endoporus, Mounting hole, wire connection terminal are located at endoporus and are connected with Inside coil to form tap wire seat after casting complete, and when cast installs Closed using bolt in hole.External mold forms curved slab and the first bending plate, the second folding positioned at curved slab both ends by bending Bent plate, the setting of the first bending plate, the second bending plate are used for installation panel, in assembling, pass through clamping tooling panel The end that side wall is close to the side wall of the first bending plate and panel is resisted against on the second bending plate.The dry type formed after casting complete becomes Depressor pour mass, it is made of the main body of tubular, the long convex block in main body and the tap wire seat on long convex block.

Clearly advised due to having in dry-type transformer standard GB/T1094.11-2007 to weather rank test and test method It is fixed, C2 grades of weather grade：Dry-type transformer is minimum to be run under -25 DEG C of environment temperature, transport and store.And existing cast The dry transformer pouring body that mould is formed is when carrying out C2 grade of weather grade and testing, not only mistake between tap wire seat and long convex block Cross position and be also easy to produce problem of Cracking, and intermediate location between main body, long convex block, i.e., corresponding to curved slab and the first bending plate it Between bending part also because angle is larger produce stress concentration then easily cracking problem.

The content of the invention

The purpose of this utility model is to provide a kind of poured with epoxy resin dry transformer pouring mould to have, with solution State problem easy to crack existing for existing dry transformer pouring body.

To reach above-mentioned purpose, the utility model is achieved using following technical scheme：

A kind of poured with epoxy resin has with dry transformer pouring mould, including external mold, panel, and the external mold is equipped with curved slab And positioned at the curved slab both ends successively bending formed the first bending plate, the second bending plate, the panel include mainboard with And the side wall positioned at the mainboard both ends, when the mainboard is welded with multiple taps, the large end face of the tap with it is described Mainboard is concordant, and the height of the side wall is not less than the height of first bending plate, the truncated cone-shaped endoporus of the tap and institute State and First Transition curved surface is formed between large end face, the range of taper of the endoporus is 0.4-0.5, and the endoporus is equipped with glass fibre Grid cloth, in casting epoxy resin, the fiberglass gridding cloth is filled in the epoxy resin of conducting wire surrounding in the endoporus It is interior.

Further, the height of the side wall is more than the height of first bending plate.

Further, formed with the second fillet surface between the curved slab end and first bending plate.

Further, the radius of second fillet surface is 30mm.

Further, 52 ° of angle between the tangent line and the first bending plate of the curved slab end.

Further, the endoporus has the bottom surface adjacent with the large end face and opposite with the bottom surface upper Bottom surface, the diameter range of the bottom surface is 35-40mm, and the diameter range of the upper bottom surface is 25-30mm.

Compared with prior art, the advantages of the utility model and beneficial effect is：

The height of side wall is not less than the height of the first bending plate in the utility model panel so that mainboard and curved surface in panel Plate end is concordant or stretches into curved slab, after casting mold assembles and completes cast, avoids the formation of long convex block, also Solve the problems, such as easy to crack between long convex block, main body.Specifically, side wall height be equal to the first bending plate height feelings Under condition, mainboard is concordant with curved slab end, and in cast, mainboard is prevented between epoxy resin enters two the first bending plates, shape Into pour mass include main body and the tap wire seat in main body, the side of main body include the curved surface that curved slab formed and The plane that mainboard is formed, and transition is gently not likely to produce problem of Cracking when environment temperature changes between plane, curved surface, and pour The corner angle that can also polish between plane, curved surface after the completion of note, further reduce stress concentration.It is more than the first folding in the height of side wall In the case of the height of bent plate, mainboard and partial sidewall are stretched into inside curved slab after assembling, after casting complete, the cast of formation Body includes main body, tap wire seat, and the long recess of indent is formd on the side of main body, and tap wire seat is located at interior flat in long recess On platform, technologist can eliminate long recess by the side for main body of cutting or polish so that the inner platform equipped with tap wire seat With the side gentle transition of main body, it is not easy to produce problem of Cracking.In order to mitigate main body and decompose the stress concentration between line seat, The utility model forms First Transition curved surface between the endoporus of tap and the large end face of tap, after pour mass is formed, The surface blending between tap wire seat and main body can be achieved, the possibility to crack herein is reduced when environment temperature changes, by Be in truncated cone-shaped in the endoporus of tap, the utility model also designs the endoporus that range of taper is 0.4-0.5, by increase taper into One step eliminates the internal stress of tap wire seat, effectively reduces the possibility that tap wire seat cracks itself.In order to increase tap The fill factor of line seat, prevent tap wire seat from cracking, and the utility model is also provided with fiberglass gridding in the endoporus of tap Cloth, in casting epoxy resin, fiberglass gridding cloth parcel conducting wire is simultaneously filled in the epoxy resin of conducting wire surrounding, in order to subtract Phenomenon that is light or avoiding tap wire seat from cracking.

After the detailed description of the utility model embodiment is read in conjunction with the figure, other features and advantage of the utility model It will become clearer.

Brief description of the drawings

Fig. 1 is the structure diagram of external mold in the utility model embodiment；

Fig. 2 is the partial schematic diagram in Fig. 1；

Fig. 3 is the structure diagram for the panel for being welded with tap；

Fig. 4 is to be welded with the panel of tap and the structure diagram after external mold assembling.

Embodiment

It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described.

In the description of the utility model, it is to be understood that term " first ", " second " are only used for description purpose, and It is not intended that instruction or imply relative importance, therefore it is not intended that limitation to the utility model.

Have referring to figs. 1 to shown in Fig. 4, the present embodiment proposes a kind of poured with epoxy resin with dry transformer pouring mould, It can pour into a mould to form dry transformer pouring body using this casting mold, the casting mold includes external mold 10, panel 20 etc. and this The relevant part of utility model improvement.External mold 10 forms curved slab 11 and positioned at 11 liang of curved slab especially by bending End the first bending plate 12 that bending is formed successively, the second bending plate 13, the first bending plate 12, the 13 L-shaped laying of the second bending plate, As shown in Figure 1 and Figure 2, panel 20 is made, is taken the shape of the letter U using channel steel, it includes mainboard 21 and the side wall positioned at 21 both ends of mainboard 22, as shown in Figure 3.Wherein, multiple taps 30 are welded with mainboard 21, formed with truncated cone-shaped endoporus on tap 30, poured After the completion of note, the epoxy resin positioned at endoporus forms tap wire seat, in order to facilitate depanning, in the large end face of welding time-division contact 30 It is concordant with mainboard 21.Particularly, the height that side wall 22 is designed in the embodiment of the utility model is not less than（It is greater than or equal to） The height of first bending plate 12 so that mainboard 21 is concordant with 11 end of curved slab on assembling rear panel 20 or stretches into curved slab 11 It is interior, refering to what is shown in Fig. 4, specifically the height of design side wall 22 is more than the height of the first bending plate 12 in the present embodiment, to avoid length The formation of convex block.In order to avoid cracking phenomenon, the present embodiment are especially tapping between tap wire seat and main body in pour mass First Transition curved surface 31 is formed between first 30 truncated cone-shaped endoporus and large end face, is led to after tap 30 can have been welded on mainboard 21 Cross polishing and form First Transition curved surface 31, in order to mitigate the internal stress of tap wire seat, prevent that its is cracked, the utility model Embodiment also increases the taper of endoporus, specifically, the taper of endoporus can select between 0.4-0.5.

For the ease of illustrating, the present embodiment endoporus has the bottom surface adjacent with large end face and opposite with bottom surface upper Bottom surface, internal stress is produced in order to avoid tap wire seat diameter is too small, causes to produce problem of Cracking, the utility model is in taper model In the case of being trapped among 0.4-0.5, the diameter range for further designing bottom surface is 35-40mm, and the diameter range of upper bottom surface is 25-30mm, specifically, it is 36mm, upper bottom surface 28mm that bottom surface is designed in the present embodiment, can draw interior after taper determines The height number in hole.

Specifically, cut to mitigate technologist, the workload of polishing, the bending plate of side wall 22 to the first in the present embodiment 12 high 2-5mm so that shallower long recess is formed after casting complete, and designs tangent line and the first bending of 11 end of curved slab 52 ° of angle between plate 12 so that after long recess is eliminated, plane where tap wire seat and between the side of main body preferably Gentle transition, while the technique that angle larger between 11 end of curved slab and the first bending plate 12 can also improve the processing of external mold 10 Property, reduce dress external mold 10 difficulty.

When the height of side wall 22 is more than the height of the first bending plate 12, although corresponding in 11 end of curved slab and the first folding Epoxy resin between bent plate 12 can be eliminated by cutting, polishing, but in order to further reduce stress concentration herein, carry High casting quality herein, the present embodiment is between 11 end of curved slab and the first bending plate 12 formed with the second fillet surface 14, and the radius for specifically designing the second fillet surface 14 is 30mm.

The problem of in order to increase the fill factor of tap wire seat, reduce its cracking, the present embodiment is also in tap 30 Hole is provided with fiberglass gridding cloth（Attached drawing is not shown）, specifically, the thickness 1.5mm of fiberglass gridding cloth, sizing grid For 3*5mm, in casting epoxy resin, fiberglass gridding cloth parcel conducting wire is simultaneously filled in the epoxy resin of conducting wire surrounding.

The above descriptions are merely preferred embodiments of the present invention, is not to make other forms to the utility model Limitation, any person skilled in the art is changed or is modified as possibly also with the technology contents of the disclosure above equivalent The equivalent embodiment of change.But it is every without departing from the content of the technical scheme of the utility model, the technology according to the utility model is real Any simple modification, equivalent variations and the remodeling that confrontation above example is made, still fall within the guarantor of technical solutions of the utility model Protect scope.

Claims (6)

1. a kind of poured with epoxy resin has with dry transformer pouring mould, including external mold, panel, the external mold be equipped with curved slab with And positioned at the curved slab both ends successively bending formed the first bending plate, the second bending plate, the panel include mainboard and Side wall positioned at the mainboard both ends, when the mainboard is welded with multiple taps, the large end face of the tap and the master Plate is concordant, it is characterised in that

The height of the side wall is not less than the height of first bending plate,

First Transition curved surface, the range of taper of the endoporus are formed between the truncated cone-shaped endoporus and the large end face of the tap For 0.4-0.5,

The endoporus is equipped with fiberglass gridding cloth, and in casting epoxy resin, the fiberglass gridding cloth is filled in described In endoporus in the epoxy resin of conducting wire surrounding.

2. poured with epoxy resin according to claim 1 has with dry transformer pouring mould, it is characterised in that the side wall Height be more than first bending plate height.

3. poured with epoxy resin according to claim 1 has with dry transformer pouring mould, it is characterised in that the curved surface Formed with the second fillet surface between plate end and first bending plate.

4. poured with epoxy resin according to claim 3 has with dry transformer pouring mould, it is characterised in that described second The radius of fillet surface is 30mm.

5. poured with epoxy resin according to claim 1 has with dry transformer pouring mould, it is characterised in that the curved surface 52 ° of angle between the tangent line of plate end and the first bending plate.

6. poured with epoxy resin according to claim 1 has with dry transformer pouring mould, it is characterised in that the endoporus With the bottom surface adjacent with the large end face and the upper bottom surface opposite with the bottom surface, the diameter range of the bottom surface For 35-40mm, the diameter range of the upper bottom surface is 25-30mm.