KR20100104032A

KR20100104032A - Structure of low temperature rise way and method thereof

Info

Publication number: KR20100104032A
Application number: KR1020090022164A
Authority: KR
Inventors: 박성주; 이동은; 이상훈
Original assignee: 엘에스전선 주식회사
Priority date: 2009-03-16
Filing date: 2009-03-16
Publication date: 2010-09-29

Abstract

The present invention relates to the structure of a distribution pipe, and more particularly, by defining the housing materials surrounding the bus bar and the mixing ratio of these materials and the spacing of the bus bars relative to the housing, the bus bar is generated during energization. The present invention relates to a structure of a distribution pipe system that effectively dissipates heat, prevents heat from accumulating inside, prevents moisture from penetrating from the outside, and has appropriate short-circuit strength, fire resistance, and heat resistance.

The structure of the distribution pipe line according to the present invention is a distribution pipe line consisting of a conductor bar and a housing surrounding the conductor bar, the conductor bar; And a housing molded integrally with the conductor bar so as to enclose the conductor bar in an airtight manner, the housing having a top surface, a bottom surface, and both sides thereof, wherein the housing has an upper surface that is a distance from an upper surface of the housing to the conductive bar. The interval between the lower surface and the lower surface of the housing from the lower surface of the housing to the conductor bar is the same, and the lateral spacing from the side surface of the housing to the central axis of the conductor bar is greater than the upper surface and lower surface interval, and the housing is epoxy It consists of the material containing resin, hardening | curing material, and filler.

Description

Structure of distribution line with minimized thermal accumulation and its manufacturing method {Structure of low temperature rise way and method

The present invention relates to the structure of a distribution pipe, and more particularly, by defining the materials of the housing that surrounds the bus bar and the blending ratio of these materials, and the spacing of the bus bars relative to the housing, The present invention relates to a structure of a distribution pipe system that effectively dissipates generated heat, prevents heat from accumulating inside, prevents moisture from penetrating from the outside, and has appropriate short-circuit strength, fire resistance, and heat resistance.

In the past, the wiring method using the wire cable has been widely adopted as the power wiring method. However, as the power demand of buildings such as high-rise buildings, apartments, and large factories soars, the adoption of the wiring method by the distribution line using busbars has spread. It is becoming. Distribution lines and cables have a common point in that they have conductors and insulators.However, compared to cables, distribution lines can carry large amounts of current through the conductors, and protect the conductors and insulators with metal ducts. It is possible to relocate, and it is easy to deal with accidents in case of an accident and easy to manage the system.

3 and 4 are cross-sectional views schematically showing a distribution line I (100) and a distribution line II (200) of the prior art. As can be seen in the figure, the conventional distribution pipe line I (100) wraps the inner bus bars 101, which are conductors, with an insulating material 103, and a metal enclosure 102, such as steel or aluminum, is fixed to the outside thereof. In the structure fixed to (104), the conventional power distribution pipe line II (200) holds the upper and lower portions of the plate-shaped inner bus bars 201 as conductors with an insulating material 203, and the metal such as iron or aluminum is disposed on the outside thereof. The enclosure 202 is configured with the fixing member 204.

In general, when the current flows through the busbars in the distribution pipe, Q = I ² R, that is, Joule heat is generated, and the heat rises due to this heat, and the current carrying capacity and the internal busbar size insulate the inner busbar. Or within the allowable temperature range of the structure surrounding the internal busbars. Where I is the current (A) and R is the resistance of the internal busbar. Therefore, in order to effectively dissipate the heat generated from the internal busbars when the current is energized, in the case of low pressure, the internal busbars are closely attached to the enclosure to form a sandwich structure (conventional distribution line I) or air insulation method (conventional distribution line II). It is installed and operated to maximize the heat dissipation effect.

By the way, the structure of the conventional distribution pipe is a pipeline structure in which tropical air is generated by providing an air layer inside the distribution pipe. In other words, the heat generated from the internal busbars during the energization heats the air existing between the busbars and the metal enclosure, and the heated air moves upwards to circulate. It was hard to escape outside.

Therefore, in the above structure, the size and cross-sectional area of the distribution pipe must be increased for effective heat dissipation, which is a factor of cost increase.

On the other hand, since the insulating material used in the conventional distribution pipe has a temperature range of 130 ° or less, a defect occurs in the temperature test of 130 ° or higher, 750 ° to 950 °, and 1100 °, which is high temperature, and the performance may not be satisfied. There was no fear of fire due to excessive heat accumulation.

In addition, the metal enclosure used in the conventional distribution pipeline has difficulty in making explosion-proof and high temperature fire-resistant structure according to the processing shape and insulation method structure of the inner bus bar, and correspondingly, manufacturers who have to process new shapes in response to the limitations of the equipment are limited. In addition to large and expensive investment, there was a problem in that the waterproof performance is poor, such as rainwater penetrates due to the joint between the plate and the plate forming the metal enclosure.

In addition, since a high current flows in the distribution tube, when a short circuit accident occurs between internal busbars due to an insulation accident, a very large short-circuit electromagnetic force may be generated by the flowing high current, which may destroy the product itself. Stability is also required.

The present invention has been proposed in order to solve the problems of the conventional distribution tube as described above, an object of the present invention is to effectively dissipate heat to the outside of the distribution tube, to provide a high-strength distribution pipeline with high waterproof, fire-resistant, flame retardant.

The invention disclosed in this application consists of the following structures in order to solve the said subject.

According to an aspect of the present invention, a distribution pipe path consisting of a conductor bar and a housing surrounding the conductor bar, the conductor bar; And a housing formed integrally with the conductor bar by being in contact with the conductor bar to cover the conductor bar and having a cross section having an upper surface, a lower surface, and both sides, wherein the housing has an upper surface interval that is an interval from an upper surface of the housing to the conductive bar. And a lower surface spacing that is a distance from a lower surface of the housing to the conductor bar is equal, and a side spacing that is an interval from a side surface of the housing to a central axis of the conductor bar is greater than the upper surface spacing and the lower surface spacing. Provided is a structure of a distribution tube made of a material comprising an epoxy resin, a curing agent and a filler.

In addition, the material constituting the housing has a weight ratio of epoxy resin to hardener of 100: 25 to 35, and a weight ratio of liquid epoxy resin and hardener to solid filler of 15 to 25: 75 to 85. Is provided.

Further, there are a plurality of conductor bars, arranged in at least one of a transverse direction along the upper surface of the housing and a longitudinal direction along the side of the housing, wherein the spacing between the neighboring conductor bars in the transverse direction is the same The structure of is provided.

In addition, a structure of a distribution line having a spacing between the neighboring conductor bars is 15.4 to 19 mm.

In addition, the side wall spacing is 18 to 30mm, the upper surface and the lower surface spacing is provided with a structure of the distribution pipe path of 17 to 25mm.

In addition, the conductor bar is provided with a structure of a distribution pipe wrapped around the outer surface of the refractory insulating sheet.

On the other hand, according to an aspect of the present invention, in the method for producing a distribution pipe furnace comprising a plurality of conductor bars arranged side by side and a housing surrounding the same, the weight ratio of epoxy resin to the curing agent is 100: 25 to 35, the liquid epoxy Preparing a molding material comprising an epoxy resin, a curing agent, and a filler such that the weight ratio of the resin and the curing agent to the solid filler is from 15 to 25:75 to 85; And a distribution pipe manufacturing method for integrally molding the housing by contacting the conductor bars so as to hermetically surround the conductor bars each having the same spacing between neighboring conductor bars.

In addition, the housing, the upper surface spacing from the upper surface of the housing to the conductive bars and the lower surface spacing from the lower surface of the housing to the conductive bars are 17 to 25 mm, respectively, the conductor closest to the side of the housing from the side of the housing A method for producing a distribution pipe line for molding is provided so that the side spacing to the center axis of the bar is 18 to 30 mm, and the spacing between neighboring conductor bars is 15.4 to 19 mm.

According to the present invention, when heat resistance is generated by the electrical resistance flowing through the conductive bars inside, heat is transmitted to the housing to meet the outside air to dissipate heat, thereby minimizing heat accumulation in the distribution pipe.

In addition, according to the present invention, it is possible to obtain a distribution pipe line excellent in water resistance, fire resistance and flame retardancy.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the structure of the distribution line with a minimum heat accumulation according to the present invention.

1 is a perspective view of a distribution tube according to an embodiment of the present invention, Figure 2 is a cross-sectional view taken along the line A-A of FIG. Referring to FIGS. 1 and 2, the distribution pipe line 10 includes a plurality of conductor bars 2 and a housing 1 having upper and lower surfaces and both sides of the cross section surrounding the airtight body. The conductor bar 2 can be made using aluminum, copper, or an alloy of aluminum and copper.

On the other hand, the composition of the housing (1) is made of an epoxy resin as a main material, and in more detail, a high temperature insulating liquid epoxy and a curing material, and various kinds of fillers are mixed and cured. The blending ratio of the housing material and the specific molding method will be described later.

The conductor bar 2 is disposed inside the housing 1 at regular intervals from an outer surface of the housing 1, that is, an upper surface, a lower surface, and both sides thereof. The conductor bar 2 is disposed from the upper surface of the housing 1. The upper surface spacing 5, which is the spacing up to, and the lower surface spacing 6, which is the spacing from the lower surface of the housing 1 to the conductor bar 2, are the same, and the side and the side of the housing 1 are closest to each other. The lateral spacing 4 which is an interval to the central axis of the adjacent conductor bar 1 is comprised larger than the said upper surface spacing 5 and the lower surface spacing 6.

In addition, it is preferable that the space | interval 3 between neighboring conductor bars is comprised uniformly.

In this embodiment, the spacing 3 between the conductor bars is preferably 15.4 mm to 19 mm, the upper surface spacing 5 and the lower surface spacing 6 are preferably 17 mm to 25 mm, and the side spacing 4 is It should be 18 mm to 30 mm. When the above gap condition is satisfied, the heat dissipation effect to the distribution pipe is best, and the water is prevented from infiltrating and exhibiting the best waterproof (IP68.7) performance, and the appropriate short-circuit strength (40㎄ / 20J or more) is exhibited. .

Next, a description will be given of a preferred embodiment of a method for manufacturing a distribution tube with a minimum heat accumulation according to the present invention.

In the distribution tube of the present invention, a high temperature insulating liquid epoxy and a hardening material and various kinds of waterproofing, explosion proof, fireproof and heat resistant fillers are mixed and kneaded at a constant temperature and time. In this case, the weight ratio of the liquid epoxy and the cured material as the main material is preferably in a ratio of 100 to 25 to 35, and due to the curing temperature characteristics of the main material and the cured material, it is necessary to maintain a proper temperature and time when kneading.

In addition, as the various types of fillers, coarse ground sand of 1.5 to 2.0 mm size, fine ground sand of 0.2 to 0.5 mm size, silica powder of 0.04 to 0.3 mm size, and chalk ( chalk, microdol, micro glass ball, mica sand, etc. are mixed, and the weight ratio of liquid epoxy and hardener and solid filler is 15 to 25 to 75 to 85 It is desirable to.

In particular, the blending ratio is a blending ratio in consideration of the thermal stretching between 18 and 22 that implements a proper function in the range of the thermal elongation 17 of copper, which is a material of the conductor bar and the thermal elongation 24 of the aluminum, according to the compounding ratio, 730 It has excellent fire resistance and heat resistance at degrees 960 to 1960 (1100).

Next, the conductor bar is placed in the mold using a guide that keeps the conductor bars arranged at a predetermined interval, and the dough material is poured evenly and filled, and then the dough material is cured while maintaining the level. Inside the mold, it is preferable to apply a release material in advance so that the material and the mold are separated well. At the time of hardening, although it keeps 20 to 25 degree | times, it drys normally, but according to a thermosetting system, hardening time can be shortened.

Table 1 below shows the test value of the temperature measured according to the amount of current while changing the distance between neighboring conductor bars with the upper and lower surface spacings as 17 mm and the side spacing as 18 mm.

TABLE 1

Although the present invention has been described with reference to the above-described preferred embodiments, it is possible to make various modifications or changes without departing from the spirit and scope of the invention.

In this regard, the preferred embodiment of the present invention has been described as having a structure in which the conductor bar is disposed transversely along the upper surface of the housing, but is not limited thereto, and the conductor bar is disposed in the longitudinal direction along the side of the housing along the distribution line. Since it can be arranged in both the transverse direction and the longitudinal direction, it is possible to have a structure of a distribution pipe consisting of a plurality of arrangements, such as 1 phase 1 stage, 1 phase 2 stage, 2 phase 2 stage, 6 phase 2 stage.

In addition, although the preferred embodiment of the present invention has been described as a conductor bar that is not refractory insulated, when the molding is performed after wrapping the outer surface of the conductor bar with a refractory insulating sheet, higher fire resistance may be ensured.

In addition, although the preferred embodiment of the present invention uses a plate-shaped conductor bar, it is possible to use a circular conductor bar and the like, without being limited thereto.

The structure of the distribution pipe line according to the present invention is a distribution pipe line installed at an upper portion such as a ceiling, a manhole-trench, a special site outdoors, an underground, and a power plant, a ship, an offshore facility, nuclear power, thermal power, wind power, tidal power. It can be used for power distribution lines such as solar power.

1 is a perspective view of a structure of a distribution pipe line according to a preferred embodiment of the present invention.

2 is a cross-sectional view taken along the line A-A of FIG.

3 is a schematic cross-sectional view of a conventional distribution pipe line I.

4 is a schematic cross-sectional view of a conventional distribution pipe line II.

* Description of Symbols for Main Parts of the Invention *

1 housing 2 conductor bar

3: Spacing between conductor bars 4: Side spacing

5: Top clearance 6: Bottom clearance

10: distribution pipe

Claims

In the distribution pipe consisting of a conductor bar and a housing surrounding the conductor bar,

Conductor bars; And

And a housing molded integrally with the conductor bar to seal the conductor bar in an airtight manner, the housing having a top surface, a bottom surface, and both sides thereof.

The housing,

The upper surface spacing, which is the distance from the upper surface of the housing to the conductor bar, and the lower surface spacing, which is the distance from the lower surface of the housing to the conductor bar, are the same.

The side spacing, which is an interval from the side of the housing to the central axis of the conductor bar, is greater than the top and bottom spacing,

The housing is a distribution pipe structure consisting of a material comprising an epoxy resin, a curing agent and a filler.

The power distribution of claim 1, wherein the material constituting the housing has a weight ratio of epoxy resin to hardener of 100: 25 to 35 and a weight ratio of liquid epoxy resin and hardener to solid filler of 15 to 25:75 to 85. Pipeline structure.

3. A conductor according to claim 1 or 2, wherein the conductor bars are plural, arranged in at least one of a transverse direction along the upper surface of the housing and a longitudinal direction along the side surface of the housing, the conductors transversely neighboring. The spacing between the bars is the same.

The power distribution pipe line structure of claim 3, wherein a distance between the neighboring conductor bars is 15.4 to 19 mm.

The power distribution pipe line structure of claim 4, wherein the lateral spacing is 18 to 30 mm, and the top and bottom spacings are 17 to 25 mm.

The power distribution pipe line structure according to claim 1 or 2, wherein the conductor bar is wrapped with a fireproof insulating sheet on an outer surface thereof.

In the method of manufacturing a distribution pipe path comprising a plurality of conductor bars arranged side by side and a housing surrounding the same,

Preparing a molding material in which the epoxy resin, the curing agent and the filler are mixed so that the weight ratio of the epoxy resin to the curing agent is 100: 25 to 35 and the weight ratio of the liquid epoxy resin and the curing agent to the solid filler is 15 to 25:75 to 85. step; And

And integrally molding the housing in contact with the conductor bars to hermetically wrap the conductor bars that are equally spaced between neighboring conductor bars.

8. The housing of claim 7, wherein the housing has an upper surface spacing from the upper surface of the housing to the conductive bars and a lower surface spacing from the lower surface of the housing to the conductive bars, respectively, 17 to 25 mm, and the side surface of the housing from the side of the housing. Method for producing a distribution pipe line molding the side spacing to the center axis of the nearest conductor bar in the range of 18 to 30mm, the distance between neighboring conductor bars is 15.4 to 19mm.