KR101294370B1 - Composite one body type line post inssulator and manufactureing method of the smae - Google Patents

Abstract

PURPOSE: An integrated LP insulator and a manufacturing method thereof are provided to completely prevent moisture from permeating by forming an upper fixture from Bulk Molding Compound (BMC) resin. CONSTITUTION: An FRP mandrel (100) includes a male screw unit (110) on the outer surface of one end. An upper fixture (300) is made of resin. A lower fixture (400) is assembled into the other end of the FRP mandrel by compressing. An insulation unit (200) has a plurality of sheds which are formed with rubber made from polymers. The insulation unit is formed by filling rubber made from polymers.

Description

COMPOSITE ONE BODY TYPE LINE POST INSSULATOR AND MANUFACTUREING METHOD OF THE SMAE}

The present invention relates to an LP insulator (Line Post insulator), and more specifically, to maximize the interfacial adhesion with the upper fixing fixture of the resin material assembled on the upper rod of the FRP material interfacial separation between dissimilar materials even in long-term use The present invention relates to a composite integrated LP insulator having a maximum mechanical life and mechanical strength by preventing insulation breakdown by blocking moisture penetration.

The LP insulator (line post insulator) is used to electrically insulate the overhead lines of transmission and distribution lines and to maintain or support the gap of high-voltage lines mechanically while being installed on the upper side of the pole by a support member such as steel. .

These LP insulators are largely commercialized by magnetic material LP insulators and polymer material LP insulators, but the magnetic material LP insulators have excellent dielectric strength and have excellent mechanical properties even in harsh environments such as temperature changes and ultraviolet rays. However, even with a slight fouling, the water repellency is lowered. Accordingly, the surface leakage current is increased, so that an insulation accident occurs and the weight is inconvenient to handle.

Therefore, in order to improve the miniaturization and weight reduction of electric power facilities, and the convenience of maintenance, the trend of converting to LP insulator of polymer material is increasing.

These polymer LP insulators have a core with a FRP core in the center to reinforce mechanical strength, and a polymer material (silicon, EPDM) resistant to air pollution and ultraviolet rays on the outer circumferential surface of the FRP core, resulting from increased leakage and flashover distances. Semi-circular process line passing groove for assembling the process line by assembling the insulation part protruding into the shape of the shade (shed) of different length (diameter) for extension of the insulation length and the upper and lower parts of the FRP mandrel. Consists of an upper fixture that formed the lower fixture to be assembled and fixed on the wrought iron installed in the pole.

The polymer LP insulator is fixed by pressing the upper fixture and the lower fixture in the state interposed between both ends of the insulating portion and the mandrel, and must be treated with a sealing agent to seal the exposed joint portion, which is a combination of the upper fixture and the lower fixture. Insulation breakdown due to moisture penetration is prevented.

Therefore, the polymer LP insulator has a disadvantage in that the manufacturing process is complicated and the manufacturing cost increases accordingly, and the upper fixing tool is made of a metal material, thereby inferior in insulation.

Thus, the present applicant combines the upper fixture 30 of the resin material formed with the processing line passage groove 31 on the upper surface with the upper portion of the core rod 10 of the FRP material is fitted as shown in FIG. After pressing and assembling the lower fixture 40 of the metal material to the lower portion of the core rod 10, the lower fixture, except for a portion of the outer peripheral surface including the ground end surface or the ground end surface of the lower fixture 40, the core rod (10) ) And the inner part of the upper fixture (30) to integrally molded the insulating portion 20 protruding in the shape of the shade 21 with different diameters for the extension of the insulation length by the core rod 10 and the upper fixture (30) The bonding process of the bonding process is shortened, and the sealing of the exposed joint of each component is completely sealed by the insulating part 20, thereby increasing the service life and maximizing the insulating performance. Polymer line with It may register the received bar line Patent Registration No. 10-0682449 (Patent Document 1) with respect to the host insulators.

The patent document 1 is to improve the coupling force between the upper fixing tool 30 and the FRP core rod 10 of the resin material (BMC: Bulk Molding Compound) the core rod 10 is processed by a plurality of annular grooves on the outer peripheral surface 11 ) Is put into the mold in the state configured, and the upper fixing tool 30 is molded to have a structure assembled with each other uneven coupling.

Such a patent document 1 forms an interface between materials by molding with various other materials, and the adhesion (adhesion) state of these interfaces occupies an important factor of the safety function of the product.

In other words, the interfacial adhesion of dissimilar materials is used as an important means of measuring the insulation performance in high pressure insulators.

The interfacial adhesion between these dissimilar materials was verified by ANSI C29. It is verified by the dye penetration test of 7.4.1 of Clause 11.

As a result of testing the interfacial adhesion with respect to Patent Document 1 by the dye solution penetration test, the interface between the core rod 10 and the insulating portion 20, and the upper fixing tool 30 and the insulating portion 20 formed to wrap the Although the adhesion is ensured by the elastic property of the polymer material rubber (silicon, EPDM), there is no interface separation, but between the upper fixing tool 30 and the uneven coupling portion 11 of the mandrel 10 are different from each other in terms of relatively hard material characteristics. Due to the difference in thermal expansion coefficient due to the temperature change due to the material, it was confirmed that the interface is separated, which may cause moisture breakdown and cause moisture breakdown.

In other words, moisture has been pointed out as a cause of safety problems as well as a decrease in mechanical strength as well as breakdown.

Thus, in order to solve the shortcomings of the patent document 1, the present applicant is applied to the outer peripheral surface of the uneven coupling portion of the FRP core rod in Patent Document 2 by applying a sealant having excellent adhesion and elasticity at room temperature to form a top fixture in a hardened state of the FRP core rod Interfacial adhesion was provided to each other by sealants interposed in the uneven interface of the upper fixture that is engaged with the uneven coupling portion.

Patent Document 1: Republic of Korea Patent No. 10-2007-0682449 (Registration Date: 2007. 02. 07) Patent Document 2: Republic of Korea Publication No. 20-2011-0001614 (published date: February 17, 2011)

However, Patent Document 2 is prepared by applying the sealant to the concave-convex joint of the FRP core rod first and then hardening it in a state in which the upper fixing portion and the FRP core rod of the resin material are bonded and molded to form the upper fixture. If the process is complicated and the sealant application work of the adhesive function is unsure, the certainty of interfacial adhesion cannot be guaranteed due to pore formation or the like.

In addition, the application of the sealant has a small thickness, the interfacial separation between the dissimilar materials due to the expansion and contraction of the upper fixture according to the long-term use, the product reliability was deteriorated.

Therefore, the present invention is a composite integral LP insulator without interfacial separation by polymer material rubber having good elasticity even in temperature deviation by molding polymer material rubber, which is a material of insulating part, formed on the outside at the interface between dissimilar material FRP core and upper fixing sphere. It provides a method for producing the same.

Composite integrated LP insulator of the present invention for solving the above problems,

FRP mandrel having a male thread on one side of the outer peripheral surface;

An upper fixing tool made of resin screw-assembled into a female thread groove portion having a predetermined gap in the male screw portion; And

A lower fixture fixed to the other side of the FRP mandrel; Including,

A plurality of sheds are formed of polymer material rubber surrounding the outer part of the lower fastener and a part of the outer peripheral surface including the ground end face or the ground end face, and the entire outer part of the upper fastener, and the gap between the male screw part and the female screw groove part. An insulating part filled with the polymer material rubber therein;

And a control unit.

Here, the male screw portion is composed of a filling guide groove for connecting between the screw grooves, the female screw groove portion is characterized in that the polymer material rubber is filled and molded through them by forming a filling passage hole at the start end.

And the filling guide groove and the filling passage hole is preferably at least a plurality for the injection time and the ease of injection operation of the polymer material rubber is injected, but may be composed of three or four.

Method for producing a composite integrated LP insulator of a preferred embodiment of the present invention,

Processing a filling guide groove in a thread connecting a male thread portion and a screw groove portion of the male thread portion to an outer circumferential surface of one side of the FRP mandrel, and pressing and assembling the lower fixture on the opposite side;

Forming a female screw groove portion having a predetermined gap with the outer circumferential surface of the male screw portion and an upper fixing tool having a filling passage hole at a start end of the female screw groove portion with a BMC (Bulk Molding Compound) resin material and screw-assembled to the male screw portion;

Injecting the upper fixture and the FRP mandrel and lower fixture into the mold in an assembled state;

While injecting polymer rubber into the mold at a predetermined pressure, the gap between the male threaded portion and the female threaded groove is guided and filled into the gap between the male threaded portion and the female threaded groove through the filling passage hole, and at the same time, the ground end surface or the grounded end surface of the lower fixture is filled. The insulating part having a plurality of sheds is formed of a polymer material rubber by enclosing the whole of the outer and the FRP mandrel and the upper fixture except the outer peripheral surface including a part.

Here, the polymer material rubber filled in the gap formed between the male thread portion and the female thread groove portion is injected through the filling passage hole opposite to the start end of the female thread groove portion of the upper fixing sphere and filled in the screw groove through the filling guide groove of the male thread portion. And is filled and molded.

In addition, another manufacturing method of the composite integrated LP insulator of another embodiment of the present invention,

Forming an interfacial coating rubber by processing an outer circumferential surface of the FRP mandrel on one side of the concave-convex coupling part and firstly putting the concave-convex coupling part into a mold to coat the outer circumferential surface of the concave-convex coupling part with a predetermined thickness with a polymer material rubber;

Injecting the FRP core rod of the state in which the interfacial coating rubber is molded into a mold, and forming an upper fixture using a bulk molding compound (BMC) resin with the interfacial coating rubber wrapped;

Squeezing and assembling a lower fixture to the FRP mandrel toward the opposite side in the state of forming the upper fixture;

Assemble the lower fixture and inject the polymer material rubber at a predetermined pressure into the mold in a third way to remove the outer and part of the outer peripheral surface including the ground end surface or the ground end surface of the lower fixture and the FRP mandrel, the entire outside of the upper fixture. It is characterized in that the insulating portion having a plurality of sheds in the state encapsulated and connected to the interface coating rubber.

Here, after molding the upper fixture in a state of exposing the interfacial coating rubber, it is preferable that the polymer material rubber of the insulating part is integrally molded in a state of being connected to the interfacial coating rubber so that there is no material separation.

According to the present invention, the interfacial adhesion between the FRP core rod of the composite LP insulator and the upper fixing member heterogeneous material of the BMC material has good elasticity filling the interface, and is manufactured by integral molding with the same material as the polymer material rubber, which is an external insulating part. Since there is no interface separation, it completely blocks water generation at the interface and provides long service life by preventing insulation breakdown.

In addition, according to the present invention, it is possible to manufacture without a defective rate of the product by a unique manufacturing method, there is an effect that the safety and reliability of the product is guaranteed.

1 is a perspective view of a composite LP insulator of the present invention.
2 is a cross-sectional view of the composite LP insulator of the present invention.
3 is an enlarged view of an excerpt "F" of FIG. 2.
Figure 4 is an exploded perspective view of the upper fixture and the core for explaining the core configuration of the present invention.
5 to 7 is a process chart showing a manufacturing step of the preferred embodiment of the present invention,
5 is an assembly step of the lower bracket and the FRP mandrel,
6 is an assembly step of the FRP mandrel and the upper fixture,
7 is a step of molding the insulation by inserting into the mold in the state that the mandrel and the upper fixture is assembled.
8 to 11 is a process chart showing another manufacturing method of the present invention,
8 is a molding step of processing the uneven coupling portion on the outer circumferential surface of one side of the FRP mandrel,
9 is a molding step diagram of the upper fixture on the outside of the interfacial coating rubber formed on the FRP mandrel,
10 is an assembly step of the lower fixture on the other side of the FRP mandrel
11 is a step of molding the insulation by putting the upper fixture in the FRP mandrel and the lower fixture is put into the mold in the assembled state.

The present invention wraps the FRP mandrel and the upper fixture in order to prevent the insulation breakdown caused by moisture caused by the interface separation between the rigid FRP mandrel and the FRP mandrel and the upper fixing part of the heterogeneous material and weak elastic BMC material The polymer material rubber, which is a material of an insulating part to be molded, is integrally molded in a state of being injected / filled at an interface to provide adhesion without interfacial separation as a stretch property of the polymer material rubber injected into the interface.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

The components shown in the drawings for the purpose of describing the present invention may be simplified or exaggerated as long as they do not affect the rights of the present invention.

1 is a perspective view of a composite integrated LP insulator of a preferred embodiment of the present invention, Figure 2 is a cross-sectional view according to the present invention.

As shown in FIG. 2, the FRP core rod 100 having a predetermined diameter, the upper fixture 300 which is assembled or molded at both ends of the upper and lower ends of the FRP core rod 100 to support and fix the processing line, and a telephone pole. Leakage distance for enclosing the entire outside except the lower surface of the lower fastener 400, the FRP core rod 100, the upper fastener 300 and the lower fastener 400 of the metallic material assembled to the perfect iron of the leakage A composite integral LP insulator is shown in which an insulating part 200 having sheds having different lengths is formed for the purpose of increasing the number of shades.

As shown in Figure 5, the composite integrated LP insulator of the present invention, the FRP core rod 100 is a coupling groove formed on the other side of the lower fixture 400 in the state of processing the male screw 110 on one outer peripheral surface ( In the state fitted to 410 by using a crimping mechanism such as a die to bind to each other.

As shown in FIG. 6, the FRP core rod 100 is screwed and coupled to the male screw part 110 by a female screw groove part 310 provided inside the upper fixture 300.

Here, the male thread portion 110, as shown in more detail in Figures 3 and 4, the filling induction groove 120 for connecting between the screw grooves across the screw thread boundary between the screw groove and the screw groove is processed At the start end of the female thread groove 310, the filling passage hole 320 is screwed in a molded state.

The upper fixture 300 is molded by replacing with a BMC (Bulk Molding Compound) which is a hard resin material in order to solve the disadvantage of the weight and the insulation performance of the existing metal material.

At this time, the female thread groove 310 is formed in a size having a predetermined gap (Gap) for ease of screwing by the screw rotation to the male screw portion (110).

Therefore, the male threaded portion 110 of the FRP core rod 100 and the female threaded portion 310 of the upper fixture 300 have a predetermined gap (gap) and are prepared in a screw-assembled state.

In this state, that is, the upper fastener 300 and the lower fastener 400 is assembled into the FRP core rod 100, as shown in Figure 6 into the mold.

In this state, a plurality of sheds are surrounded by the outer portion of the lower end of the fastener 400 or the outer peripheral surface including the ground end, including the entire outer portion of the FRP mandrel 100 and the upper fastener 300 with a polymer material rubber. Injection molding the insulating portion 200 having a

At this time, the molten (gel) polymer rubber is injected through a gate (inlet) at a pressure of 150 to 160 K, and the male thread groove 110 of the FRP core rod 100 and the upper fixing hole 300 are 310. The insulating part 200 is molded in a state in which the polymer material rubber is filled between gaps between the gaps.

The interfacial injection between the male rubber part 110 and the female thread groove 310 is performed by the polymer material rubber as described above. The filling passage hole 320 formed at the beginning of the female thread groove 310 of the upper fastener 300 is screwed. The polymer material rubber is easily injected between the interface by the filling guide groove 120 processed between the screw groove and the thread connecting the screw groove and the screw groove at the same time. Molding is made.

At this time, the filling guide groove 120 and the filling passage hole 320 is preferably at least a plurality for the injection time and ease of injection operation of the polymer material rubber is injected, three or more for the quickness of the injection It may consist of four pieces.

Composite integrated LP insulator of the present invention is integrally molded in the state in which the polymer material of the insulating portion 200 is molded for insulation on the interface between the upper fixing sphere 300 coupled to the FRP core rod 100 is interfaced integrally It will have a structure that maximizes adhesion.

To summarize the manufacturing process of the present invention,

The filling guide groove 120 is machined on a thread connecting the male thread portion 110 and the screw groove of the male thread portion 110 to one side outer circumferential surface of the FRP mandrel 100, and the lower fixture 300 on the opposite side thereof. The steps of compression assembly are taken.

In this state, BMC (Bulk Molding) has an upper circumference of the male thread groove portion 310 having a predetermined gap with the outer circumferential surface of the male thread portion 110 and the upper passage having the filling passage hole 320 at the start end of the female thread groove portion 310. Compound) 300 is formed of a resin material and screw assembly to the male screw portion 110 is taken.

The upper fixing sphere 300 and the FRP mandrel 100 and the lower fixing sphere 400 are taken into the mold in the assembled state is taken.

When the polymer material rubber is injected at a predetermined pressure (150 to 160) through the gate (inlet) in the state injected into the mold, the filling passage hole 320 connected to the female screw part 310 of the upper fixing hole 300 Filled in the gap between the male thread portion 110 and the female thread groove portion 310 through the guide guided to the filling guide groove 120 for connecting the screw groove across the thread and the thread of the male thread portion 110 do.

In the state in which the polymer rubber is filled between the interfaces, the entire outer surface of the lower stopper 400 except for the ground end surface and the FRP core rod 100 and the outside of the upper fixture 300 are surrounded by a plurality of polymer material rubber. The composite 200 having the shed is molded to manufacture the composite LP insulator of the present invention.

As mentioned above, although preferred Example was described about this invention, the scope of the present invention is not limited to what was demonstrated previously.

That is, the composite integrated LP insulator of the present invention can be manufactured by the same steps as shown in FIGS. 8 to 11.

As shown in FIG. 8, the surface coated rubber coated with a predetermined thickness on the outside of the uneven coupling portion 111 by processing the outer peripheral surface uneven coupling portion 111 of the FRP mandrel and inserting it into a mold. Take the step of forming 210.

As shown in FIG. 9, the FRP core rod 100 in the state where the interfacial coating rubber 210 is molded is injected into a mold in a second state, and the BMC (Bulk Molding Compound) is wrapped in the interfacial coating rubber 210. Taking the step of forming the upper fixture 300 with a resin material.

As shown in Figure 10, in the state in which the upper fixture 300 is molded, the step of assembling the lower fixture 400 to the FRP mandrel 100 to the opposite side is taken.

As such, the lower fixture 400 is assembled, and as shown in FIG. 11, the lower fixture 400 is set in a mold, and a polymer rubber is injected at a predetermined pressure (150 to 160K) through an injection hole, thereby lowering the fixture. Surrounding the outer and the outer portion of the outer surface including the ground end surface or the ground end surface of the 400 and the FRP mandrel 100, the upper fixing sphere 300 in the state of being molded and connected with the interface coating rubber 210 An insulating part 200 having a plurality of sheds is molded.

In this case, after the upper fixing tool 300 is molded in a state in which the interface coating rubber 210 is exposed, the polymer material rubber of the insulating part 200 is integrally formed in a state of being connected with the interface coating rubber 210. .

The core gist of the present invention as described above is a rigid FRP mandrel 100 and the insulating portion 200 is formed externally at the interface of the coupling portion between the FRP mandrel and the upper fixing portion 300 of the heterogeneous material and the weak BMC material is weak elasticity (200) The rubber material of the polymer) is integrally molded in a state of being filled with certainty and easily.

The polymer rubber filled at the interface has elastic properties, and thus it is possible to prevent dielectric breakdown due to moisture caused by the interface separation between the hard material FRP and the BMC heterogeneous material.

That is, the polymer material rubber, which is a material of the insulating part 200 formed by wrapping the FRP core rod 100 and the upper fixing tool 300, is integrally molded in the state of being injected / filled at the interface, thereby interfacing with the elastic property of the polymer material rubber. It is to provide adhesion without separation.

The present invention can be usefully used to maintain or support the interval of the high-voltage wire and the like at the same time to electrically insulate the overhead line of the transmission, distribution line as well as the long-term use, as well as to maximize the safety.

100: FRP core 110: male thread
111: uneven coupling portion 120: filling guide groove
200: insulation 210: interfacial coating rubber
300: upper fastener 310: female thread groove
320: filling passage ball 400: lower fixture

Claims (7)

FRP mandrel having a male thread on one side of the outer peripheral surface;
An upper fixing tool made of resin screw-assembled into a female thread groove portion having a predetermined gap in the male screw portion; And
A lower fixture fixed to the other side of the FRP mandrel; Lt; / RTI >
A plurality of sheds are formed of polymer material rubber surrounding the outer part of the lower fastener and a part of the outer peripheral surface including the ground end face or the ground end face, and the entire outer part of the upper fastener, and the gap between the male screw part and the female screw groove part. An insulating part filled with the polymer material rubber therein;
Composite integrated LP insulator comprising a.
The method of claim 1,
The male screw portion is composed of a filling guide groove for connecting between the screw grooves, the female screw groove portion is a composite integral LP insulator, characterized in that the polymer rubber is filled and molded through them by forming a filling passage hole at the start end.
The method of claim 2,
The filling guide groove and the filling passage hole is a composite integrated LP insulator, characterized in that consisting of two to four.
(a) processing the filling guide groove on the thread connecting the male thread portion and the male thread portion of the male thread portion on the outer peripheral surface of the FRP mandrel, and pressing and assembling the lower fixture on the opposite side;
(b) a female thread groove portion having a predetermined gap with the outer circumferential surface of the male thread portion and an upper fixing tool having a filling passage hole at the start end of the female thread groove portion are formed of BMC (Bulk Molding Compound) resin material and screw-assembled to the male screw portion; Doing;
(c) injecting the upper fixture and the FRP mandrel and the lower fixture into a mold in an assembled state;
(d) While injecting the polymer material rubber into the mold at a predetermined pressure, the gap between the male threaded portion and the female threaded groove is guided and filled into the gap between the male threaded portion and the female threaded groove through the filling passage hole, and at the same time, the ground end surface or ground of the lower fixture. Forming an insulating part having a plurality of sheds with a polymer material rubber surrounding the outer part of the outer surface including the outer surface including the end surface and the FRP mandrel and the upper fixture;
Composite integrated LP insulator manufacturing method comprising a.
5. The method of claim 4,
The step (d) is characterized in that the filling is filled and filled in the screw groove through a plurality of filling guide grooves are injected through the filling passage hole opposed to each other at the start end of the female screw groove portion of the upper fixture. Composite integrated LP insulator manufacturing method.
(a) processing the one side outer peripheral surface uneven coupling portion of the FRP core rod, and first put into the mold to coat the outer peripheral surface of the uneven coupling portion with a predetermined thickness with a polymer material rubber to form an interface coating rubber;
(b) injecting the FRP core rod in the state where the interfacial coating rubber is molded into the mold for the second time, and forming the upper fixture with a BMC resin package while wrapping the interfacial coating rubber;
(c) press-assembling the lower fixture on the FRP mandrel to the opposite side in the state of forming the upper fixture;
(d) Assembling the lower fastener and injecting the rubber material into the mold in a third way to inject a polymer rubber at a predetermined pressure, excluding the outer peripheral part including the ground end surface or the ground end surface of the lower fixture, and the FRP mandrel and the upper part. Forming an insulation having a plurality of sheds in a state in which the entire outer surface of the fixture is formed and connected to the interface coating rubber;
Composite integrated LP insulator manufacturing method comprising a.
The method according to claim 6,
In the step (b), after forming the upper fixture in the state of exposing the interface coating rubber, the polymer material rubber of the insulating part is integrally molded in a state connected with the interface coating rubber by the molding of the step (d). Method for producing a composite integrated LP insulator, characterized in that.

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