KR20110027541A - Cut out switch for a current transformer - Google Patents

Abstract

PURPOSE: A cut out switch assembly for a transformer and an insulator assembly manufacturing method are provided to alleviate the impact due to the partial deviation of a fuse assembly by comprising the impact alleviation unit. CONSTITUTION: A fuse assembly(10) comprises a fuse and a holder installed inside the heat resistance pipe(11). An insulator assembly(20) comprises a core bar having the insulation shield. The core bar of the insulator assembly is made of the insulating material using the glass fiber chop. One side of a support stand is buried inside the cored bar.

Description

CUT OUT SWITCH FOR A CURRENT TRANSFORMER}

The present invention relates to a cutout switch assembly for a transformer, and more particularly, to improve the structure and manufacturing process of the fuse assembly and insulator assembly constituting the cutout switch assembly.

In order to supply power to consumers, it is supplied by high voltage power to reduce distribution loss from substation to the vicinity of customers. It is supplied to consumers by adjusting to the proper voltage by using the supplied electric power and overcurrent such as short circuit when being connected to transformer from ultra high voltage line. A cutout switch is installed to protect the transformer from damage.

As such, the cut-out switch for a transformer is installed on the primary side of the transformer and used to protect the transformer from an accident such as a secondary short circuit of the transformer due to overload or overcurrent. The structure is as follows:

As shown in Figures 1 to 4,

The cut-out switch assembly includes an insulator assembly 120 and a fuse assembly 110 incorporating a fuse 112, and includes a fuse assembly 110 by an upper supporter 130 and a lower supporter 140. Is fixedly supported, and the insulator assembly 120 is fixedly installed to one side of the upper supporter 130 and the lower supporter 140.

First, referring to the insulator assembly 120, a suspension cable holder 124 is provided at the center of the fixing bracket 123 and the core rod 121 made of high-strength metal above and below the core rod 121 made of FRP (glass fiber reinforced plastic) only. ) Is crimped and fixed.

As shown in FIG. 1, the fixing bracket 123 has a screw rod 123a formed therein, so that the fixing bracket 123 is formed on the upper supporting bracket 130 and the lower supporting bracket 140. It can be fixed through a nut, the suspension cable holder 124 has a structure in which a separate ring 124b is fastened to the ring fastening end 124a.

On the other hand, the suspension cable holder 124 is connected to the cable that is fixed by hanging the cut-out switch assembly to the pole.

The fixing bracket 123 and the suspension cable holder 124 described above are manufactured by using a high-strength material through mechanical processing, and should be fixed to the core rod 121 through a hydraulic crimping device. In addition, the production cost is increased and the weight is heavy, so it is not suitable as a suspension type hanging in the air with uneconomical problems.

In addition, the core rod 121 is produced by the extrusion method using only a high weight of FRP, the manufacturing cost is expensive, the manufacturing is difficult, and the weight has a disadvantage that is also uneconomical and unsuitable as a suspension.

As shown in Figure 4, the fuse assembly 110 is an imported non-combustible tube made of a material such as asbestos inside the heat-resistant tube 111 produced by impregnating the woven glass fibers in epoxy resin or unsaturated polyester resin ( 118) is inserted.

Therefore, as the non-combustible material is used, the manufacturing cost is high, and the manufacturing process is difficult. Especially when exposed to ultraviolet rays, the heat-resistant tube 111 is corroded from the surface, and the glass fiber is exposed to the outside, thus breaking into large and small particles. There is a large lung dispersal, which is one of the causes of respiratory and eye diseases, and even cancer.

In addition, when an electrical abnormality such as an overload occurs in the transformer, the fuse 112 inside the fuse assembly 110 is melted and the fuse 112 is melted, and the generated gas is strongly moved to the upper portion of the heat-resistant tube 111. While being discharged, the first holder 113 is bounced out by a force exceeding the repulsive force due to the elasticity of the elastic plate 133 and the coil spring 134, and as shown in FIG. 3, the locking rod 115 of the holder 116 is rotated. As a center, the entire fuse assembly 110 is bent downward.

Therefore, as shown in FIG. 3, the second holder 114 of the fuse assembly 110 is strongly hit by the protruding end 1443, and strong vibration and impact are generated in the entire fuse assembly 110 due to the repulsive force generated at this time. In this case, the catching rod 115 escapes through the opening 141a of the lower support hole 130, and eventually the entire fuse assembly 110 falls to the ground.

As a result of this phenomenon, a number of passersby are injured or cars or articles are frequently damaged.

In the present invention, in order to solve such a conventional problem, by forming a sunscreen coating layer on the entire outer surface of the heat-resistant tube of the fuse assembly to prevent the scattering of harmful components even when exposed to ultraviolet rays, the paper tube inside the By forming and performing the coating, the non-combustible material can be replaced, thereby reducing the cost and constructing an environmentally friendly fuse assembly.

In addition, the curing process is performed at a high temperature, and the insulation coating of the insulator assembly is carried out using a special insulator that can guarantee mechanical strength, thereby reducing the cost of manufacturing the insulator assembly and insulator assembly. It is intended to provide.

In addition, the fuse assembly acts by the gas generated by the fuse break, and a means for mitigating the impact on the fuse assembly is configured to prevent the fuse assembly from coming off from the bracket.

The cut-out switch assembly for a transformer according to the present invention includes a fuse assembly including a holder for embedding a fuse in a heat-resistant tube and fixing the upper support hole and the lower support hole, and an insulator including a mandrel having an insulating shade formed by silicone insulation on an outer surface thereof. In a cutout switch assembly for a transformer comprising an assembly,

The fuse assembly is characterized in that the sunscreen coating layer is formed on the entire outer surface of the heat-resistant tube and the non-flammable coating material layer is formed on the entire inner surface.

And the insulator assembly is made of an insulating material using the glass fiber 되는 hardening proceeds above a predetermined temperature, the core rod,

One side is buried in the mandrel and the other side is coupled to the upper and lower support and the support for fixing the insulator assembly to the upper and lower support, and extending from the tube buried in the center of the mandrel Exposed to the outside of the insulated shade, characterized in that it comprises a suspension cable holder for fixing the hanging cable.

And the method of manufacturing the insulator assembly of the cut-out switch assembly for the transformer of the present invention, the support and the suspension cable holder is seated at each position of the first mold mandrel forming groove for the mandrel and the first mandrel forming groove of the first mold The process of filling the insulating material using the glass fiber 제조 prepared by the same process, the process of curing the insulating material by covering the top plate of the first mold, heating and pressing, and after curing for a predetermined time to dismantle the first mold The fourth process of forming, and the fifth process of surface treatment of the outer surface of the mandrel produced through the fourth process, and the second process for forming the housing after applying the adhesive along the outer surface of the mandrel treated with the fourth process It is characterized by consisting of a sixth step of molding the insulator assembly by filling and injecting the silicone rubber into the housing molding groove and seated in the housing molding groove of the mold The.

According to the present invention, in the fuse assembly constituting the fuse in the heat-resistant tube, forming a UV blocking coating layer on the entire surface of the heat-resistant tube, the inner surface of the heat-resistant tube is coated with a paper tube to insert into the heat-resistant tube By forming a non-flammable coating layer in the inside of the tube, compared to using a non-combustible tube that is an expensive imported product, the workability is excellent and simple, and the manufacturing cost is low, and the weight can be obtained. In particular, due to the UV-blocking coating layer formed on the surface of the heat-resistant tube, even if exposed to ultraviolet light for a long time, it is possible to solve the closed end that the heat-resistant tube is corroded and broken.

And the mandrel made of special insulation material using glass fiber 은 is lighter in weight than the conventional mandrel and can simplify the manufacturing process, thereby lowering the manufacturing cost, miniaturizing it compared to the conventional mandrel, and easily impacting against external impact. It is possible to build insulator assemblies that do not break.

On the other hand, as the fuse assembly is partly separated to form a shock mitigation means for mitigating the shock transmitted when rotated downward along the lower support hole, the fuse assembly is completely separated by the shock delivered by the fuse assembly. By preventing this, accidents can be prevented in advance.

1 is a view showing the structure of a conventional cutout switch assembly for a transformer.
Figure 2 is a partial cross-sectional view showing the insulator assembly structure of a conventional cutout switch assembly for a transformer.
3 is a view illustrating a detachment operation of a fuse assembly in a cutout switch assembly for a conventional transformer;
Figure 4 is a cross-sectional view showing the heat-resistant tube structure of the fuse assembly in the conventional cut-out switch assembly for a transformer.
Figure 5 is a view showing the structure of the cutout switch assembly for the present invention transformer.
Figure 6 is a partial cross-sectional view showing the structure of the insulator assembly in the present invention.
7 is a cross-sectional view of the heat-resistant tube of the fuse assembly in the present invention.
8 is a front view of the support of the insulator assembly in the present invention.
9 is a side cross-sectional view of the support of the insulator assembly according to the present invention.
10 is a cross-sectional side view of the suspension cable holder of the insulator assembly in the present invention.
Figure 11 is a plan view of the suspension cable holder of the insulator assembly in the present invention.
Figure 12 is a perspective view of the impact absorption protrusion of the lower support in the present invention.
13 and 14 is a view showing the operation of the escape operation and the shock-absorbing protrusion of the fuse assembly in the present invention.
15 is a view showing another embodiment of the impact absorbing projection of the lower support in the present invention.
16 is a view showing another embodiment of the suspension cable holder of the insulator assembly in the present invention.
17 is a view showing another embodiment of the suspension cable holder of the insulator assembly in the present invention.
18 is a view showing another embodiment of the support of the insulator assembly in the present invention.
19 to 22 is a view showing each process to show the manufacturing method of the insulator assembly of the cutout switch assembly for a transformer of the present invention.
Figure 23 is a flow chart showing the manufacturing process of the insulator assembly of the cutout switch assembly for a transformer of the present invention.

The configuration and operation of the present invention will be described with reference to the embodiments shown in FIGS. 1 to 15 as follows.

The cut-out switch assembly for a transformer according to the present invention includes a fuse assembly 10 and an insulator assembly 20, and the fuse assembly 20 is fixed by the upper supporter 30 and the lower supporter 40. It is made of a structure that is supported, the insulator assembly 10 is fixed to one side of the upper supporter 30 and the lower supporter 40,

The fuse assembly 10 includes a heat-resistant tube 11 having a UV blocking coating layer 11a formed on the entire outer surface and a phosphorous coating layer 11b which is a non-flammable material on the entire inner surface, and the heat-resistant tube 11 A first holder 13 fixed to an upper side of the heat-resistant pipe 11 and fitted into the resilient ring 31 of the upper support hole 30 and having a handle for assembling and detaching. ), A holder 16 having a second holder 14 fixed below the heat-resistant tube 11, a locking rod 15 inserted into the opening portion 41a of the lower support hole 40, It is configured to include a fixing pin 17 for fixing the second holder 14 and the holder 16,

The insulator assembly 20 includes a mandrel 21 made of a special insulating material using glass fiber, an insulating shade 22 formed on the entire outer surface of the mandrel 21, and one side of the insulator 21 embedded in the mandrel 21. And the other side thereof is coupled to the upper supporter 30 and the lower supporter 40 so as to support and fix the insulator assembly 20 to the upper supporter 30 and the lower supporter 40. It extends from the tube (24a) buried in the center of the mandrel 21 is exposed to the outside of the insulating shade 22 and comprises a suspension cable holder 24 for fixing the hanging cable.

The lower supporter 40 has an opening portion 41a on which the engaging rod 15 of the fuse assembly 10 is seated, formed in the body 41 and for fixing the support 23 of the insulator assembly 20. The support coupling portion 42 is configured as one side of the body 41, the lower portion of the support coupling portion 42 and the second of the fuse assembly 10 when the fuse assembly 10 is rotated and flipped downward The holder 14 is configured to include a shock-absorbing protrusion 43 to allow the shock to be absorbed while being inserted.

Such a cut-out switch assembly for the present invention transformer

(a). Fuse assembly structure to reduce the manufacturing cost by forming a non-combustible coating material (red coating layer) internally instead of the non-combustible material to solve the problems that may be caused by ultraviolet by forming an ultraviolet coating layer externally,

(b). Insulator assembly structure to reduce cost by simplifying manufacturing process by using special insulation material using glass fiber 촙 which is insulator and guarantees mechanical strength by hardening at a predetermined temperature,

(c). Characterized by the structure of the lower support for providing a fuse assembly escape prevention structure by configuring the impact relief means of the fuse assembly so that the fuse assembly is not separated by the impact when the fuse is disconnected.

In the present invention as described above,

As shown in FIG. 7, the heat-resistant tube 11 of the fuse assembly 10 is formed with a sunscreen coating layer 11a on the entire outer surface thereof.

The sunscreen coating layer 11a may be made of a UV blocking agent or silicone or urethane.

Then, a paper tube is inserted into the heat-resistant tube 11 to form a phosphorous (Phosphate) coating layer 11b on the paper tube.

Here, fiberglass tubes can be used instead of paper tubes.

Non-flammable coating material can be used in various applications in addition to the coating material.

The fuse 12 is installed in the center of the heat resistant tube 11.

The first holder 13 and the second holder 14 is a means for fixing the heat-resistant pipe 11 to the upper support hole 30 and the lower support hole 40, the first holder 13 is the heat-resistant It is inserted into the elastic ring 31 to the upper side of the tube 11 and is fixed.

The first holder 13 is composed of a handle (13a) for assembly and separation in the elastic ring 31 of the upper support sphere (30).

The fixing stand 16 of the second holder 14 is a means for fixing the lower support slot 40 under the heat-resistant tube 11 and is a locking rod inserted into the opening portion 41a of the lower support slot 40. 15 is constituted.

The fixing pin 17 is a means for fixing the second holder 14 and the holder 16.

The insulator assembly 20 is composed of a mandrel 21 and a silicon insulating shade 22 formed on the entire outer surface of the mandrel 21, and the insulator assembly (upper and lower support 30 and lower supporter 40) up and down. 20, and a support 23 for fixing the suspension cable, and also comprises a suspension cable holder 24 for fixing the hanging cable.

The mandrel 21 is made of a special insulating material using a glass fiber 있도록 so that the weight can be made lightly.

A special insulating material using the glass fiber 하는 constituting the mandrel 21 and the manufacturing method of the insulator assembly using the same will be described in detail below.

As shown in Figures 8 and 9, the support 23 is coupled in the buried state above and below the mandrel 21 and the "b" to install and fix the upper support 30 and the lower support 40 It has a form, and the investment hole 23a is formed in order to maintain a buried state firmly to the core rod (21).

The support 23 is fixed between the first connector 32 and the second connector 33 of the upper support 30 and with the bolt and nut to the support engaging portion 42 of the lower support 40, For this purpose, the support 23 is formed with a bolt hole (23b).

As shown in FIG. 10, the suspension cable holder 24 extends from the tube body 24a buried in the center of the mandrel 21 and the tube body 24a and is exposed to the outside of the silicon insulating shade 22. A protruding end 24d is formed in which a suspension cable fixing hole 24c for fixing the hanging cable is formed.

The tubular body 24a may be configured to include a buried hole 24b so that the buried state of the core rod 21 can be firmly maintained.

As shown in FIG. 6, the tubular body 24a of the suspension cable holder 24 is embedded in the core rod 21 to be manufactured, and the core rod 24 is embedded in the buried hole 24b of the tubular body 24a of the suspension cable holder 24. Since the material constituting the 21 is filled, it is possible to fix the suspension cable holder 24 to the core rod 21 more firmly and securely as compared with pressing and fixing the conventional metal fittings.

 The support 23 and the suspension cable holder 24 is made of steel or casting for general structure, and the size and weight is lighter than the conventional metal fittings, and thus the weight of the insulator assembly 20 is greatly reduced. The insulator assembly 20 in the embodiment of the present invention is about 1/3 of the weight of the insulator in the form of the ingot and can be configured to be about 30% lighter than the conventional.

16 and 17 show another embodiment of the suspension cable holder 24 'of the present invention. Instead of the tube 24a, the iron piece 24e may be welded to the protruding end 24d. The concave-convex portion 24f can be formed at the end of 24d.

In addition, the protruding end 24d may be configured as a round bar.

In addition, as shown in FIG. 18, an uneven portion 23c may be formed at the end of the support 23 ′, or the support 23 ′ may be configured as a round bar.

The lower support 40 is fixed to the fuse assembly 10 to one side of the body 41, the insulator assembly 20 is fixed to the other side.

Body 41 has an opening portion (41a) is formed so as to seat the engaging rod 15 of the fuse assembly 10, the support coupling portion for fixing the support 23 of the insulator assembly 20 to the other side 42 is configured.

The support coupling portion 42 has a structure for coupling and fixing the support 23 of the insulator assembly 20 by bolts and nuts.

The shock absorbing protrusion 43 is a stopper of the fuse assembly 10 and a means for mitigating impact when the fuse assembly 10 is rotated and flipped downward.

12 to 14, the shock absorbing protrusion 43 has a structure for mitigating the impact when the fuse assembly 10 is detached and turned around while being rotated about the catching rod 15. Have

As shown in FIG. 12, the shock absorbing protrusion 43 is bent from the extension 43a extending downward of the support coupling portion 42 to rotate the radius of the fuse assembly 10, that is, the second holder 14. It is installed in the rotation radius of the), and constitutes a holder inserting portion 43c having left and right wing portions 43b so that the second holder 14 can be inserted.

In addition, the holder inserting portion 43c is formed to have an inclined surface that narrows toward the extension portion 43a in the direction in which the second holder 14 can be buffered, and the holder 43b in the extension portion 43a to further increase the buffering action. It is comprised including the incision hole 43d extended from the insertion part 43c.

That is, the impact-absorbing protrusion 43 has a structure in which a wing portion 43b having an inclined surface in which a gap is narrowed toward the center incision hole 43d formed in the extension portion 43a is formed symmetrically, and has a fuse 12. 13 and 14, the second holder 14 is inserted into the holder of the shock-absorbing protrusion 43, even if the fuse assembly 10 is pulled down downwards with the locking bar 15 as the rotation center. Since the back of the wing portion 43b is opened while rubbing against the inclined surface of the portion 43c, the impact force is absorbed and dispersed through the wing 43b and the cut-out hole 43d, so that the locking rod 15 of the fuse assembly 10 is held. ) Is to stay in the opening (41a) without escaping to the opening (41a) of the body 41 of the lower support (40).

The operator can then safely remove the fuse assembly 10 from the lower support hole 40 and replace it with a new one.

On the other hand, Figure 15 shows another embodiment of the shock-absorbing protrusion 43.

A protrusion 14a is formed on the second holder 14 of the fuse assembly 10, and the protrusion 14a can be inserted when the fuse assembly 10 is bent downward to the lower end of the extension 43a. Two leaf springs 43e can be configured.

In this case, the insulating shade 22 may be extended to the support 23 to be coated, and the shape and size of the insulator assembly 20 may be variously configured.

Meanwhile, the manufacturing process of the insulator assembly using the special insulating material constituting the mandrel of the insulator assembly and the same will be described.

After cutting the glass fiber to a certain size to form a glass fiber 촙, unsaturated polyester resin and additives are mixed to mature in the form of gel (gel) to produce a sheet-shaped special insulation material.

The glass fiber yarn is made of 750 ~ 4400 TEX in thickness.

The special insulating material using the glass fiber 는 is 10-30% by weight of glass fiber 형성된 formed by cutting a glass fiber yarn to a predetermined size, 20 to 35% by weight of unsaturated polyester resin, a curing agent, a low shrinkage agent, a high temperature curing agent, a release agent, It is made by mixing 35 to 70% by weight of the filler.

In general, glass fiber (glass-fiber) is a filamentized by melting the glass as a raw material at a high temperature of about 1,600 ℃ and spinning it in water, the type is divided into long fibers and short fibers.

The long fibers in the glass fibers are separated into glass yarns and glass rovings, and the glass yarns are stranded by focusing 50 to 200 pieces of molten glass raw material as a precursor. ), Which is formed by applying twist to it, and glass roving is formed by combining dozens of bones without imparting twist to the focused glass fiber.

Such glass fibers have mechanical, thermal, and chemical properties, including electrical properties. First, the electrical properties are excellent in electrical insulation, the mechanical properties are good in dimensional stability (elongation 3-4%, elastic recovery 100%), Tensile strength and tensile modulus are very good.

In addition, it is non-flammable, lead-free and gas-free, with excellent heat resistance and fire resistance (heat resistance temperature 300 ~ 550 ℃, softening temperature 840 ℃) and physiologically stable material. Has available chemical properties.

The glass fiber yarn is cut to a predetermined size to form a glass fiber filament, and then, the unsaturated polyester resin and the additive are mixed to prepare a primary sheet 2, which is aged in a gel form.

The glass fiber yarn used in the present invention has a thickness of 750 to 4400 TEX, and finely cuts it in 20 mm to 25 mm units to form a glass fiber filament.

Here, as a more preferred embodiment, the glass fiber yarn uses 750 TEX, the cut size is 20mm.

In addition, an unsaturated polyester resin and an additive are mixed with this glass fiber to prepare a sheet.

The additive is composed of a curing agent, a low shrinkage agent, a high temperature hardener, a release agent, a filler, a thickener, the hardener and a low shrinkage agent is added to the glass fiber, and the high temperature hardener and the release agent, filler, thickener is added to an unsaturated polyester resin.

As described above, an unsaturated polyester resin to which a reinforcing agent, a curing agent, a releasing agent, a filler, and a thickener is added is mixed with the glass fiber chopped with the curing agent and the low shrinkage agent to prepare a sheet.

Unsaturated polyester resin (UPE) is produced in various combinations according to the type of saturated, unsaturated dibasic acid and glycol. Preferably, the viscosity of the resin is low so that impregnation is good. In the thickening process, the viscosity rises appropriately and after completion of thickening, Should be a resin with no change in viscosity over time.

The reinforcing agent is a variety of types of free spinning roving (선택: roing) to suit the required performance, and excellent in formability and workability, low cost fiberglass spinning yarn is preferred.

The low shrinkage agent tends to have a large shrinkage due to a curing reaction in the thermosetting resin, and is usually accompanied by a volume shrinkage of 5 to 8%, and this shrinkage causes inaccurate molding and cracking. do.

In order to improve these drawbacks, a low shrinkage agent of thermoplastic resin is added to compensate for shrinkage and surface properties.

The curing agent is used as the organic peroxide, and according to the reaction temperature at which the peroxide is dissolved, it is classified into a medium temperature hardener, a high temperature hardener, etc. In the present invention, TBPB (Tertiary Butyl PeroxyBenzoate) activated at around 140 ℃ is used, and preferably stored It is selected in consideration of stability, fluidity, reactivity, appearance and gloss, curing efficiency, and physical properties in the mold.

The filler is mainly used calcium carbonate, sodium hydroxide, low specific gravity minerals, and the most commonly used is calcium carbonate.

The thickener is added to improve the bonding strength with the glass fiber.

Poor impregnation, lack of flow or overflow have a large effect on the thickening behavior of the resin, which can be controlled by the balance of the carboxyl and hydroxyl groups attached to the resin ends and the molecular weight distribution.

When mixed with the resin compound, the viscosity must be low to impregnate the glass fiber, and the filler and the glass fiber can be added a lot, and the breakage of the glass fiber is reduced, but once the glass fiber is impregnated, the high viscosity must be maintained. When forming, the glass fiber is less separated from the resin compound, and shrinkage is reduced, so that a good surface product can be obtained.

The release agent is melted in the compound before being cured by the heat of the mold to move to the mold surface to form a release layer to prevent the material from adhering to the mold.

In one embodiment of the mixing ratio of these compositions, 10 to 30% by weight of glass fibers 형성된 formed by cutting the glass fiber yarn to a certain size, 20 to 35% by weight of unsaturated polyester resin, a curing agent, a low shrinkage agent, a high temperature curing agent, Mix 35% to 70% by weight of the release agent and filler.

The composition obtained by such a process is poured into a plate-shaped mold, aged for 24 hours while being heated at 30 to 50 ° C., and then separated from the mold, thereby obtaining a sheet-like sheet-shaped special insulating material having a predetermined thickness.

19 to 22 are views for illustrating a manufacturing process of the insulator assembly showing the manufacturing process, the manufacturing process of the insulator assembly with reference to the drawings as follows.

The first process of seating the support 23 and the suspension cable holder 24 in each position of the core rod forming groove 101 of the first mold 100 for the core rod molding, and the support 23 and the suspension cable holder 24 The second process of filling the special insulation material 300 using the glass fiber 된 prepared by the above process in the core rod forming groove 101 of the first mold seated on the first mold, and the top plate of the first mold 100 The third process of covering and heating, pressurizing, and after curing for a predetermined time to dismantle the first mold 100 to form a mandrel 21 and the fourth process of the mandrel 21 produced through the fourth process The fifth process of surface treatment of the outer surface, and the adhesive is applied along the outer surface of the mandrel 21, the surface treatment through the fifth process and then seated in the housing molding groove 201 of the second mold 200 for housing molding After the filling is made of a sixth process of molding the insulator assembly by filling and injecting the silicone rubber into the housing molding groove 201 Lose.

According to such a manufacturing process, first, the core rod 21 is manufactured by using a special insulating material 300 using glass fiber,. The glass fiber 촙 is hardened at a predetermined temperature (150 ° C.) or more, and is an insulator. It is manufactured by the same manufacturing process as above to ensure mechanical strength.

First, as shown in FIG. 19, the bracket 23 and the hanging cable holder 24 are seated at each position of the mandrel forming groove 301 of the first mold 300 for mandrel forming.

Of course, after partially inserting the special insulating material 200 into the mandrel forming groove 301, the support 23 and the suspension cable holder 24 are seated, and then the special insulating material 200 is attached to the primary mold 300 of FIG. 20. As shown in the figure, the mandrel formed groove 301 is filled.

Then, covering the top plate of the first mold 300, and heated and pressurized at a temperature of 150 ℃ and 150Kg / Cm ² to cure a predetermined time (15 minutes), after dismantling the first mold 100 shown in Figure 21 As shown, the mandrel 21 is formed.

When the mandrel 21 is completed as described above, the adhesive is applied along the outer surface of the mandrel 21 so that the silicone rubber can be adhered to the mandrel 21. The surface treatment of the mandrel 21 is performed to increase the adhesion. Then apply the adhesive.

The above-mentioned adhesive agent uses an industrial adhesive agent, and the adhesive agent is for improving the sticking force of the core rod 21 and silicone rubber, and it is not necessary to use an adhesive agent as needed.

As described above, the core rod 21 coated with the adhesive is seated in the housing molding groove 401 of the second mold 400, and then a silicone insulator such as silicone rubber is placed in the housing molding groove 401. Filling and injecting and coating the silicon insulator to the outer surface of the core rod 21 to form an insulating shade 22 to form the insulator assembly.

At this time, the thickness of the insulating shade 22, that is, the housing for insulation is preferably about 3 ~ 10mm, the spacing of the shade is most preferably about 5mm.

Fig. 23 is a flowchart showing a manufacturing process of the insulator assembly of the present invention as described above.

Claims (11)

Cut for transformer comprising a fuse assembly including a holder for embedding a fuse in a heat-resistant tube and fixing it to the upper and lower support holes, and an insulator assembly including a mandrel having a silicone insulating molded insulator on its outer surface In the out switch assembly,
The insulator assembly is made of an insulating material using the glass fiber 되는 that the core rod is cured at a temperature higher than a predetermined temperature,
One side is buried in the mandrel and the other side is coupled to the upper and lower support and the support for fixing the insulator assembly to the upper and lower support, and extending from the tube buried in the center of the mandrel Cut-out switch assembly for a transformer, characterized in that the suspension is exposed to the outside of the insulating shade and comprises a suspension cable holder for fixing the hanging cable. The cut-out switch assembly for a transformer according to claim 1, wherein the support and the tube form a buried hole in a portion buried in the mandrel. The cut-out switch assembly for a transformer according to claim 1, wherein an uneven portion is formed in a buried portion buried in a center of a core of the support and the suspension cable holder. The insulating material according to any one of claims 1 to 3, wherein the insulating material using glass fiber fibers constituting the mandrel is
A cutout switch assembly for a transformer, characterized in that the glass fiber yarn is cut to a certain size to form a glass fiber filament, and then mixed with an unsaturated polyester resin and an additive to mature in a gel form to produce a sheet. Cut for transformer comprising a fuse assembly including a holder for embedding a fuse in a heat-resistant tube and fixing it to the upper and lower support holes, and an insulator assembly including a mandrel having a silicone insulating molded insulator on its outer surface In the out switch assembly,
The fuse assembly is a cut-out switch assembly for a transformer, characterized in that the UV protection coating layer is formed on the entire outer surface of the heat-resistant tube and the non-combustible coating material formed on the entire inner surface. 6. The cut-out switch for a transformer according to claim 5, wherein the non-flammable coating material layer is formed by inserting any one of a Phosphate coated paper tube or a P coated glass fiber tube into the heat resistant tube. assembly. The method according to claim 1 or 5 or 6,
The lower support port is a transformer characterized in that it further comprises a shock-absorbing protrusion for absorbing the shock as the holder of the fuse assembly is inserted when the fuse assembly is rotated away from the upper support sphere to be flipped downward Cutout switch assembly. According to claim 7, wherein the shock absorbing projection is installed in the radius of rotation of the fuse assembly, the holder insertion portion having a left and right wing portion is configured so that the holder can be inserted,
The holder insert portion is formed to have an inclined surface that narrows toward the extension portion so that the shock is buffered while the holder is inserted, and the extension portion includes an incision hole extending from the holder insert portion to further increase the buffer action Cut-off switch assembly for a transformer, characterized in that the wing portion having a sloping surface narrowing toward the dog hole formed symmetrically formed. The method of claim 7, wherein the impact-absorbing protrusions are formed in the holder of the fuse assembly, the lower end of the extension is characterized in that the two leaf springs configured to be inserted when the fuse assembly is bent downwards Cutout switch assembly for transformer. The process of seating the support and the suspension cable holder at each position of the rod-shaped groove of the first mold for rod molding, and filling the rod of the first mold-shaped rod with the insulating material using the glass fiber fabric prepared by the above process. And, covering the top plate of the first mold, heating and pressing to cure the insulating material, and after curing for a predetermined time the fourth process of forming the mandrel by dismantling the first mold and the fourth process The fifth process of surface-treating the outer surface, the adhesive is applied along the outer surface of the surface-treated mandrel and then seated in the housing molding groove of the second mold for housing molding, and then filled with silicone rubber in the housing molding groove and insulated Insulator assembly manufacturing method of a cut-out switch assembly for a transformer, characterized in that the sixth process of forming the assembly. According to claim 10, The insulating material using the glass fiber 는 is 10-30% by weight of glass fiber 형성된 formed by cutting a glass fiber yarn to a certain size, 20 to 35% by weight of unsaturated polyester resin, a curing agent, a low shrinkage agent, Method for producing an insulator assembly of a cut-out switch assembly for a transformer, characterized in that a mixture of a high-temperature curing agent, a release agent, 35 to 70% by weight filler.

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