CN109471055A - A kind of local discharge test bubble-discharge model and its processing method - Google Patents

Abstract

The invention discloses a kind of local discharge test bubble-discharge models, including mold I and mold II, the main body of the mold I is the plastics mold cup I of column barrel assembling structure, the main body of the mold II is the plastics mold cup II of thin wall type barrel-like structure, the invention also discloses a kind of local discharge test bubble-discharge mould processing methods comprising the steps of: prepares material and utensil, ingredient, vacuum defoamation, is poured, is tentatively heating and curing for the first time, making model air gap, reheating solidification, second pouring and be finally heating and curing；The invention passes through cleverly design and orderly control procedure of processing, air gap is generated in epoxy resin, and metal electrode is embedded in epoxy inner, the generation for avoiding three-layer insulated layer multiple holes in gluing procedures of existing air gap model eliminates between electrode and air gap portion because of the irregular cleaning work of the fixed bring of bolt；In addition, bubble size and position are easy to fix in, facilitate batch production.

Description

A kind of local discharge test bubble-discharge model and its processing method

Technical field

The present invention relates to electrion technical field, specially a kind of local discharge test bubble-discharge model and its processing side Method.

Background technique

Shelf depreciation is under electric field action, and insulate the breakdown electrical discharge phenomenon in only partial region between conductor.Pass through Fault model is established, using the actual electric discharge phenomena of local discharge test platform simulation, high voltage electric equipment partial discharge detection skill can be carried out Research and development, skills training, instrument verification and the work more multinomial than equity of art.Shelf depreciation can be divided into bubble-discharge and (put inside Electricity), surface-discharge, corona discharge, suspended discharge etc., when it generates in solid insulation hole, in fluid insulation bubble or not With dielectric property insulation interlayer when be exactly bubble-discharge.

The air gap portion of existing bubble-discharge model is mostly the structure that three-layer insulated material is bonded together, and insulating layer is viscous It is easy to generate multiple air gaps because insulating cement is smeared unevenly during conjunction, has seriously affected the examination of typical air gap Discharge Simulation The accuracy tested, in addition air gap portion is mostly that bolt is fixed with both ends metal electrode, needs irregularly to clean and safeguard, increase The workload of testing crew；For needing to hold in such a way that blow bubble establishes bubble-discharge model in epoxide-resin glue The opportunity of good blow bubble and air-blowing quantity, if the bubble out of turn blown into is easy to be raised to before epoxy resin solidifies completely At metal electrode position, it is made to lose meaning, be easy to blow out multiple bubbles if air-blowing quantity is improper, therefore in practice seldom Using, it is more difficult to it produces in batches.

Summary of the invention

The purpose of the present invention is to provide a kind of local discharge test bubble-discharge model and its processing methods, to solve above-mentioned back The problem of being proposed in scape technology.

To achieve the above object, the invention provides the following technical scheme: a kind of local discharge test bubble-discharge model, including mould Has I and mold II, the main body of the mold I is the plastics mold cup I of column barrel assembling structure, and in the upper end cap of plastics mold cup I Nylon upper cover equipped with dish type lid-like, the middle position of nylon upper cover upper end are equipped with the installation of cylindrical trough body structure Slot, and it is equipped with the adjusting screw hole of cylindrical cavernous structure in the bottom of mounting groove, and be bolted with upper stud adjusting in screw hole, institute The lower end for stating upper stud is fixedly connected with the upper metal electrode of disk-like structure, on the wall body of the nylon upper cover and around mounting groove Outside be equipped with the plug hole that circumferentially uniformly arranges, the bottom of the plastics mold cup I and the correspondence position in upper metal electrode The lower metal electrode that place is equipped with disk-shaped structure is set, and is equipped with the locking screw of cylindrical cavernous structure in the centre of lower metal electrode The lower end scarf in hole, the plastics mold cup I has the metab of cylindrical stage scalariform structure, and the intermediate sleeve of the metab is matched There is lower stud, and the upper end of lower stud is fixed together with locking screw holes bolt；

The main body of the mold II is the plastics mold cup II of thin wall type barrel-like structure, and cylindrical knot is equipped in plastics mold cup II The air gap component of structure, the upper surface of the air gap component are the circular arc camber of indent.

Preferably, the centre of the upper metal electrode is equipped with and the cylindrical cavernous structure of the lower end bolt of upper stud Fixing threaded hole, and the gas vent circumferentially uniformly arranged is equipped in the outside of fixing threaded hole.

Preferably, the lower end of the plastics mold cup I is equipped with the locating slot of cylindrical trough body structure, and in the bottom of locating slot Via hole I equipped with the cylindrical cavernous structure matched that is nested with lower stud.

Preferably, the upper end of the metab is equipped with the convex with the cylindrical boss structure of locating slot phase scarf Platform, and the via hole II for the cylindrical cavernous structure matched that is nested with lower stud is equipped in the centre of metab.

A kind of local discharge test bubble-discharge mould processing method comprising the steps of:

Step 1: preparing material and utensil, prepares the mold I, the mold II, epoxy that are fixed with metal electrode and lower metal electrode Resin A liquid, epoxy resin B liquid, plastic cup, sucker, stirring rod, syringe, rubber tube, electronic scale, sander；

Step 2: ingredient weighs appropriate epoxy resin A liquid and epoxy resin B liquid, the two is mixed according to the proportion of epoxy resin It is stirred evenly after conjunction；

Step 3: uniformly mixed glue is put into vacuum oven, carries out vacuumize process by vacuum defoamation, and internal gas is discharged Bubble, air pressure needed for vacuum defoamation are 0.05MPa, and heating temperature is 50 DEG C, when heating a length of 10min；

Step 4: first casting is poured model lower part point and air gap component using mold I and mold II respectively；

Step 5: being tentatively heating and curing, and the department pattern being poured in upper step and air gap component are put into drying box and are heated, heating Shi Suoxu air pressure is standard atmospheric pressure, and heating temperature is 50 DEG C, when heating a length of 1.5h；

Step 6: production model air gap takes out mold I, mold II from drying box, model lower part point and air gap component is cooperated And make model air gap；

Step 7: mold I is put into drying box and heated by reheating solidification, keeps the epoxy resin adhesive liquid for blocking air gap solidifying Gu required air pressure is standard atmospheric pressure when heating, heating temperature is 50 DEG C, when heating a length of 1h；

Step 8: second pouring covers the nylon upper cover for being fixed with metal electrode, carries out the casting of metal electrode；

Step 9: being finally heating and curing, and the mold A of casting complete is put into drying box, carries out last solidification heating, heating Shi Suoxu air pressure is standard atmospheric pressure, and heating temperature is 50 DEG C, when heating a length of 2h；

Step 10: post-processing takes out the air gap model having begun to take shape from mold I, and then being polished just with sander, it is young to have The air gap model of shape processes chamfering for its cylinder edge, keeps model more attractive.

Compared with prior art, the beneficial effects of the present invention are: structure of the invention setting rationally, functional, have with Lower advantage:

By cleverly designing and orderly control procedure of processing, air gap is generated in epoxy resin, and metal electrode is embedding Enter epoxy inner, avoids the generation of three-layer insulated layer multiple holes in gluing procedures of existing air gap model, save Because of the irregular cleaning work of the fixed bring of bolt between electrode and air gap portion；In addition, bubble size and position hold very much It is fixed easily, facilitates batch production；The position of metal electrode in change, changes the total height of poured with epoxy resin, can produce suitable Answer different voltages grade bubble-discharge model.

Detailed description of the invention

Fig. 1 is model I structural schematic diagram；

Fig. 2 is the schematic diagram of the section structure at A-A in Fig. 1；

Fig. 3 is model II half section structure diagram.

In figure: 1, plastics mold cup I；2, nylon upper cover；3, metab；4, upper stud；5, lower stud；6, upper metal electricity Pole；7, lower metal electrode；8, plastics mold cup II；9, air gap component；101, locating slot；102, via hole I；201, plug hole；202, Mounting groove；203, screw hole is adjusted；301, via hole II；302, positioning convex platform；601, gas vent；602, fixing threaded hole；701, it locks Screw hole.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

Fig. 1-3 is please referred to, the present invention provides a kind of technical solution: a kind of local discharge test bubble-discharge model, including mold I It is the plastics mold cup I 1 of column barrel assembling structure with the main body of mold II, mold I, and is furnished in the upper end cap of plastics mold cup I 1 The nylon upper cover 2 of dish type lid-like, the middle position of 2 upper end of nylon upper cover are equipped with the mounting groove 202 of cylindrical trough body structure, And it is equipped with the adjusting screw hole 203 of cylindrical cavernous structure in the bottom of mounting groove 202, and be bolted with adjusting in screw hole 203 Stud 4, the lower end of upper stud 4 are fixedly connected with the upper metal electrode 6 of disk-like structure, on the wall body of nylon upper cover 2 and around peace The outside of tankage 202 is equipped with the plug hole 201 circumferentially uniformly arranged, the bottom of plastics mold cup I 1 and in upper metal electrode 6 Corresponding position be equipped with the lower metal electrode 7 of disk-shaped structure, and be equipped with cylindrical cavernous structure in the centre of lower metal electrode 7 Locking screw holes 701, the lower end scarf of plastics mold cup I 1 has the metab 3 of cylindrical stage scalariform structure, metab 3 Intermediate sleeve is furnished with lower stud 5, and the upper end of lower stud 5 is fixed together with 701 bolt of locking screw holes, wherein plastics mold cup I 1 material is PP material, and scale is indicated on the outer wall of plastics mold cup I 1, and plug hole 201, which is used to cooperate with syringe, to be poured Epoxy resin adhesive liquid, while being also the channel of epoxy resin cure stage discharge gas, and metab 3 is then entire mold Support can adjust the position of upper metal electrode 6 by rotation upper stud 4, and then change precast discharging model institute before casting The voltage class that can be born；

The main body of mold II is the plastics mold cup II 8 of thin wall type barrel-like structure, and cylindrical knot is equipped in plastics mold cup II 8 The air gap component 9 of structure, the upper surface of air gap component 9 are the circular arc camber of indent, wherein the material of plastics mold cup II 8 is PP material Matter, and scale is indicated on the outer wall of plastics mold cup II 8.

Further, the centre of upper metal electrode 6 is equipped with and the cylindrical cavernous structure of the lower end bolt of upper stud 4 Fixing threaded hole 602, and the gas vent 601 circumferentially uniformly arranged is equipped in the outside of fixing threaded hole 602.

Further, the lower end of plastics mold cup I 1 is equipped with the locating slot 101 of cylindrical trough body structure, and in locating slot 101 Bottom be equipped with the via hole I 102 of the cylindrical cavernous structure matched of being nested with lower stud 5.

Further, the upper end of metab 3 is equipped with the convex with the cylindrical boss structure of 101 phase scarf of locating slot Platform 302, and the via hole II 301 for the cylindrical cavernous structure matched that is nested with lower stud 5 is equipped in the centre of metab 3.

A kind of local discharge test bubble-discharge mould processing method comprising the steps of:

Step 1: preparing material and utensil, prepares the mold I, the mold II, epoxy that are fixed with metal electrode and lower metal electrode Resin A liquid, epoxy resin B liquid, plastic cup, sucker, stirring rod, syringe, rubber tube, electronic scale, sander；

Step 2: ingredient weighs appropriate epoxy resin A liquid and epoxy resin B liquid, the two is mixed according to the proportion of epoxy resin It is stirred evenly after conjunction, wherein the proportion of epoxy resin A liquid and epoxy resin B liquid is 2:1, before operation, keeps operating space and behaviour Make all utensils in Kong Jianian and be in cleaning, dry state, and in weighing note that first plastic cup is put on electronic scale And school zero, it is then weighed again, during stirring, takes stirring action by a small margin as far as possible, avoid producing in glue Anger bubble；

Step 3: uniformly mixed glue is put into vacuum oven, carries out vacuumize process by vacuum defoamation, and internal gas is discharged Bubble, air pressure needed for vacuum defoamation are 0.05MPa, and heating temperature is 50 DEG C, when heating a length of 10min, it is in the process, most of Bubble, which rises to glue surface, voluntarily to be ruptured, can be after vacuumize process is complete, with stirring for a small number of not broken suspended bubbles Stick is needled；

Step 4: first casting is poured model lower part point and air gap component using mold I and mold II, wherein apply mould respectively Have I and be poured model lower part timesharing, first removes the nylon upper cover in mold I, is fixed on the upper stud and upper stud on nylon on lid Stirring rod is resisted lower metal electrode by the upper metal electrode that lower end is fixed, and leans against mold cup along upper, and preparation is carried out Afterwards, the mixed glue solution after toppling over vacuum defoamation flows it slowly along stirring rod, after liquid level reaches object height, stops Casting, glue height can sets itself as needed, and apply mold II casting air gap component when, first resist plastics with stirring rod The bottom of mold cup II 8, the mixed glue solution after making vacuum defoamation flow slowly into plastics mold cup II 8 along stirring rod, work as liquid level When apart from plastics mold cup 8 top 2-3mm of II, stop casting, due to the surface tension of epoxy resin, so that glue is in mold II Interior is in concave meniscus, after heated solidification, is finally solidified as the air gap component for the curved-surface structure that tool is recessed inwardly；

Step 5: being tentatively heating and curing, and the department pattern being poured in upper step and air gap component are put into drying box and are heated, heating Shi Suoxu air pressure is standard atmospheric pressure, and heating temperature is 50 DEG C, when heating a length of 1.5h, after tentatively heating, in mold Epoxy resin enters the post curing stage, becomes the jello that slightly can be arduously pressed with thumb, the asphalt mixtures modified by epoxy resin in this stage Rouge is local solidification, and the epoxy resin newly used still can carry out chemical bonds with it；

Step 6: production model air gap takes out mold I, mold II from drying box, model lower part point and air gap component is cooperated And model air gap is made, in the process, the air gap component in mold II first is sucked out with sucker, by the inner sunken face of air gap component It is placed in mold I at the center in resin face downward, just forms an air gap among the two at this time, in order to retain this air gap, can used Stirring rod slightly gently resists air gap component, is fixed temporarily it, meanwhile, it is poured into a small amount of remaining mixed glue solution along stirring rod, After this, the glue of air gap assembly surface is evenly spread into resin face in air gap component and mold I with an other stirring rod Contact Boundary at, block the two between air gap, make its internal air gap as model；

Step 7: mold I is put into drying box and heated by reheating solidification, keeps the epoxy resin adhesive liquid for blocking air gap solidifying Gu required air pressure is standard atmospheric pressure when heating, heating temperature is 50 DEG C, when heating a length of 1h, the purpose of this step is firm gas Gap component avoids being poured the timesharing of model top in the later period, and air gap component deviates model center, and heating time must both can guarantee air gap Component is firm, and the later period is avoided to be poured the timesharing of model top, and air gap component is excessively merged with mixed glue solution, influences the form of bubble And position；

Step 8: second pouring covers the nylon upper cover for being fixed with metal electrode, carries out the casting of metal electrode, herein In the process, the nylon upper cover for being fixed with upper metal electrode should be first buckled to mold I, and rubber sleeve is then being equipped with mixed glue solution Syringe syringe needle side, and so that rubber tube is passed through the plug hole on nylon on lid and be against the wall of cup of plastics mold cup I, push note Emitter flows slowly into glue along the interior wall of cup of mold I, stops casting when glue is more than upper metal electrode, in the whole process It should be noted that inhale when using syringe, push away slowly slowly, avoids repeatedly extruding syringe and shoot out bubble；

Step 9: being finally heating and curing, and the mold A of casting complete is put into drying box, carries out last solidification heating, heating Shi Suoxu air pressure is standard atmospheric pressure, and heating temperature is 50 DEG C, when heating a length of 2h；

Step 10: post-processing takes out the air gap model having begun to take shape from mold I, and then being polished just with sander, it is young to have The air gap model of shape processes chamfering for its cylinder edge, keeps model more attractive.

Working principle: first nylon upper cover 2, upper stud 4 are removed with upper metal electrode 6 from 1 upper end plastics mold cup I, will be taken off Epoxy resin adhesive liquid after bubble is injected into the lower end of plastics mold cup I 1, when glue reaches a setting of lower 7 upper end of metal electrode Distance after, complete the casting of model lower part point, the epoxy resin adhesive liquid after deaeration be injected into plastics mold cup II 8, liquid is worked as When identity distance is from plastics mold cup 8 top 2-3mm of II, stop casting, due to the surface tension of epoxy resin, so that glue is in mold It is in concave meniscus in II, after heated solidification, the air gap component 9 for the curved-surface structure that tool is recessed inwardly finally is solidified as, by air gap group Part 9 tips upside down on the upper end of model lower part point, is then fixed temporarily to air gap component 9, on the upper end cover of plastics mold cup I 1 Be fixed with the nylon upper cover 2 of metal electrode 6, by the plug hole 201 in nylon upper cover 2 to the upper end of plastics mold cup I 1 into The casting of metal electrode 6 on row after casting complete, obtains preliminary molding air gap model by being heating and curing, by air gap model It polishes after being taken out out of mold I, it is final to obtain the relatively beautiful air gap model of shape.

It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding And modification, the scope of the present invention is defined by the appended.

Claims (5)

1. a kind of local discharge test bubble-discharge model, including mold I and mold II, it is characterised in that: the main body of the mold I is The plastics mold cup I(1 of column barrel assembling structure), and in plastics mold cup I(1) upper end cap equipped with dish type lid-like nylon on It covers (2), the middle position of nylon upper cover (2) upper end is equipped with the mounting groove (202) of cylindrical trough body structure, and in mounting groove (202) bottom is equipped with the adjusting screw hole (203) of cylindrical cavernous structure, and is bolted with upper stud adjusting in screw hole (203) (4), the lower end of the upper stud (4) is fixedly connected with the upper metal electrode (6) of disk-like structure, the wall of the nylon upper cover (2) It is equipped on body and around the outside of mounting groove (202) plug hole (201) circumferentially uniformly arranged, the plastics mold cup I(1) Bottom and it is equipped with the lower metal electrode (7) of disk-shaped structure in the corresponding position of upper metal electrode (6), and in lower metal electrode (7) centre is equipped with the locking screw holes (701) of cylindrical cavernous structure, the plastics mold cup I(1) lower end scarf have cylinder The intermediate sleeve of the metab (3) of step-like structure, the metab (3) is furnished with lower stud (5), and lower stud (5) is upper End is fixed together with locking screw holes (701) bolt；

The main body of the mold II is the plastics mold cup II(8 of thin wall type barrel-like structure), and in plastics mold cup II(8) interior equipped with circle The air gap component (9) of column construction, the upper surface of the air gap component (9) are the circular arc camber of indent.

2. a kind of local discharge test bubble-discharge model according to claim 1, it is characterised in that: the upper metal electrode (6) centre is equipped with the fixing threaded hole (602) with the cylindrical cavernous structure of the lower end bolt of upper stud (4), and in fixation The outside of screw hole (602) is equipped with the gas vent (601) circumferentially uniformly arranged.

3. a kind of local discharge test bubble-discharge model according to claim 1, it is characterised in that: the plastics mold cup I(1) Lower end be equipped with the locating slot (101) of cylindrical trough body structure, and be equipped with and lower stud (5) phase in the bottom of locating slot (101) Cover the via hole I(102 for the cylindrical cavernous structure matched).

4. a kind of local discharge test bubble-discharge model according to claim 1, it is characterised in that: the metab (3) Upper end be equipped with positioning convex platform (302) with the cylindrical boss structure of locating slot (101) phase scarf, and in metab (3) Centre be equipped with the via hole II(301 of the cylindrical cavernous structure matched of being nested with lower stud (5)).

5. a kind of a kind of local discharge test bubble-discharge mould processing method as described in claim 1-4 any one, feature Be: the processing flow of this product comprises the steps of:

Step 1: preparing material and utensil, prepares the mold I, the mold II, epoxy that are fixed with metal electrode and lower metal electrode Resin A liquid, epoxy resin B liquid, plastic cup, sucker, stirring rod, syringe, rubber tube, electronic scale, sander；

Step 2: ingredient weighs appropriate epoxy resin A liquid and epoxy resin B liquid, the two is mixed according to the proportion of epoxy resin It is stirred evenly after conjunction；

Step 3: uniformly mixed glue is put into vacuum oven, carries out vacuumize process by vacuum defoamation, and internal gas is discharged Bubble, air pressure needed for vacuum defoamation are 0.05MPa, and heating temperature is 50 DEG C, when heating a length of 10min；

Step 4: first casting is poured model lower part point and air gap component using mold I and mold II respectively；

Step 5: being tentatively heating and curing, and the department pattern being poured in upper step and air gap component are put into drying box and are heated, heating Shi Suoxu air pressure is standard atmospheric pressure, and heating temperature is 50 DEG C, when heating a length of 1.5h；

Step 6: production model air gap takes out mold I, mold II from drying box, model lower part point and air gap component is cooperated And make model air gap；

Step 7: mold I is put into drying box and heated by reheating solidification, keeps the epoxy resin adhesive liquid for blocking air gap solidifying Gu required air pressure is standard atmospheric pressure when heating, heating temperature is 50 DEG C, when heating a length of 1h；

Step 8: second pouring covers the nylon upper cover for being fixed with metal electrode, carries out the casting of metal electrode；

Step 9: being finally heating and curing, and the mold A of casting complete is put into drying box, carries out last solidification heating, heating Shi Suoxu air pressure is standard atmospheric pressure, and heating temperature is 50 DEG C, when heating a length of 2h；

Step 10: post-processing takes out the air gap model having begun to take shape from mold I, and then being polished just with sander, it is young to have The air gap model of shape processes chamfering for its cylinder edge, keeps model more attractive.