KR20100104033A

KR20100104033A - Structure of high temperature release by joint parts

Info

Publication number: KR20100104033A
Application number: KR1020090022165A
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 a connection structure of a distribution pipe, and more particularly, to a connection structure of maximizing heat dissipation in a connection where the distribution pipe lines are connected to each other. According to an aspect of the present invention, a plurality of conductor bars exposed from each of two adjacent bodies are connected to each other; And a cover surrounding the outer circumferential surface of the distal end portion of the body bar to which the conductor bar is exposed, wherein the cover is formed of a material having a higher thermal conductivity than air, and is in contact with the plurality of conductor bars to heat the heat generated from the conductor bar. To provide a connection structure for dissipating to the outside.

Description

Structure of high temperature release by joint parts

The present invention relates to a structure of a connection part of a distribution pipe, and more particularly, to a structure of a connection part of maximizing heat dissipation in a connection part in which a distribution pipe path is connected to each other.

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.

By the way, the body structure of the distribution pipe line is manufactured as a unit unit having a length of 3m by conditions such as manufacturing method, spatial utility, transport convenience. Therefore, at the time of construction, it connects the distribution line of this unit unit, and comprises a line.

7 is an exploded perspective view showing a connection portion of a distribution line according to the prior art. Referring to FIG. 7, the connection portion to which the bus bar 103 is connected is a structure in which the male connecting portion 104a and the female connecting portion 104b formed on both sides of the distribution pipe line 101 are fitted to each other and connected to each other. ) Is fastened to the respective distribution pipe lines 101 by fixing bolts 105 to protect the bus bars 103 therein.

8 is a perspective view showing a connection portion of a distribution line according to another conventional art, wherein the connection portion of the distribution line 201 is connected to the distribution line through the connection mechanism 210. Even in this case, the outside of the connection part is provided with a connection cover (not shown) to protect the bus bar 203 and the connection mechanism 210 therein.

By the way, the connection portion of the distribution line according to the prior art has a structure in which a tropical flow is generated by having an air layer therein. 9 (a) and 9 (b) are schematic side views and cross-sectional views showing the movement of a row of connection portions according to the prior art, and for the sake of explanation, the connection mechanism for connecting the busbars is not shown. 9 (a) and 9 (b), in the connection structure according to the related arts, when a current flows through the bus bar 303 in the distribution pipe line 301, the bus bar 303 The temperature is increased by the resistance, and the temperature is further increased due to the contact resistance at the portion where the distribution pipe line 301 is connected. Therefore, the heat generated from the internal contact portion during the energization heats the air 306 existing between the busbar 303 and the connection cover 302 so that the heated air moves upward and circulates to generate a continuous increase in temperature. (See the direction of heat movement 305.) This also caused the distribution pipeline system to fail and there was a risk of fire.

On the other hand, since the connection cover made of metal is fixedly installed in the distribution line made of metal by a fastening member such as a bolt, water or foreign matter penetrates into the gap formed by each member and enters the inside of the connection cover. There was.

The present invention has been proposed to solve the above problems, and by configuring the connection structure so that the conductive temperature flow is made, preventing convective temperature flow inside the connection to facilitate heat dissipation of the connection, It is excellent in waterproof and antifouling function and provides a small size connection structure.

Invention disclosed in the present application consists of the following configurations in order to solve the above problems.

According to an aspect of the present invention, a plurality of conductor bars exposed from each of two adjacent bodies are connected to each other; And a cover surrounding the outer circumferential surface of the distal end portion of the body bar to which the conductor bar is exposed, wherein the cover is formed of a material having a higher thermal conductivity than air, and is in contact with the plurality of conductor bars to heat the heat generated from the conductor bar. To provide a connection structure for dissipating to the outside.

In addition, the cover is provided with a connection structure formed integrally molded in contact with the plurality of conductor bars and the outer peripheral surface of the distal end portion to hermetically surround the outer peripheral surfaces of the plurality of conductor bars and the distal end portion.

In addition, the cover includes a contact portion having a U-shaped cross section in contact with the conductor bar, and a plurality of thermal conductive guide parts disposed corresponding to the conductor bar in a plate shape extending in the longitudinal direction of the conductor bar and coupled to the contact portion. A connection structure is provided.

In addition, the material is provided with a connection structure comprising any one of COOLPOLY, epoxy resin, engineering plastics and rubber.

In addition, the material is provided with a joint structure further comprising at least one of polyethylene and mica powder.

In addition, the outer circumferential surface of the distal end portion is provided with a connection portion structure formed with irregularities.

In addition, a connection structure is provided in which the material is metal.

In addition, the contact portion is provided with a connection structure surrounding the outer surface with an insulating sheet.

According to the present invention, the conductor bar is in direct contact with a cover made of a material having a higher thermal conductivity than air, thereby conducting heat generated by the rise of the temperature of the conductor bar to the cover and dissipating it to the outside at the portion where the distribution pipe path is connected when energizing. It can be done. Therefore, heat is not discharged to the outside of the connection part due to tropical flow, and thus the temperature inside the connection part can be prevented from rising continuously, failure of the distribution pipe system can be prevented, and the risk of fire can be reduced.

In addition, according to the present invention, since the distribution pipe line and the cover are hermetically connected, it is possible to prevent the penetration of water or foreign matter from the outside and thus have high waterproof and antifouling performance.

Further, according to the present invention, when the refractory material having the fire resistance is mixed with the material of the cover having the thermal conductivity, a connection structure having excellent fire resistance in addition to the heat dissipation can be provided.

Hereinafter, a connection structure according to the present invention will be described in detail with reference to the accompanying drawings.

(Embodiment 1)

1 shows a perspective view according to a first preferred embodiment of the present invention, and FIG. 2 shows a schematic cross-sectional view taken along line AA ′ of FIG. 1. In the case of Figure 2 for the purpose of efficient description, the connection mechanism for connecting the conductor bar is not shown.

1 and 2, the cover 2 surrounds a conductor bar 3 connected to each other and an outer circumferential surface 4 of the distal end portion of the body 1 to which the conductor bar 3 is exposed.

The cover is molded integrally in contact with the outer circumferential surface of the conductor bar and the distal end so as to hermetically surround the outer circumferential surface of the distal end of the body to which the conductor bar and the conductor bar are exposed. The cover material is formed of a material having a higher thermal conductivity than air. Preferably, rubber materials such as epoxy resins such as CoolPoly, LCP, PA, PA6, PA66, PPS, TPE, COPE, PC, PEEK, engineering plastic, ER2001, ER2183, EPDM, ER, FR, BR, etc. Can be used. In this case, when the cover is molded by mixing a refractory material such as mica powder or polyethylene, a connection structure having excellent fire resistance can be achieved.

3 is a view for explaining the flow of heat in the connection structure according to the first embodiment. According to the present embodiment, as can be seen in the movement path 5 of heat, heat generated in the conductor bar 3 is a conductor. It can be seen that it is conducted to the cover 2 which is in direct contact with the bar 3 and dissipated to the outside by the heat conduction method.

Table 1 below shows the connection structure formed by molding a cover with an epoxy resin (0.7 to 1.4 kcal / mh ° C.) having a higher thermal conductivity than that of air (0.00221 / 20 ° C. to 0.00234 / 40 ° C.) and the connection structure according to the prior art. The temperature test comparison table.

(Table 1)

Conventional connection conductor bar Temperature (℃) Example of Conductor Bar Temperature (℃) Temperature difference (℃) R phase 115.5 R phase 90.8 24.7 S phase 119.0 S phase 94.4 24.6 T phase 114.8 T phase 91.3 23.5 N phase (without current) 101.2 N phase (without current) 81.4 19.8

As can be seen from Table 1, according to this embodiment, it can be seen that the temperature difference between each phase of the conductor bar is 19.8 to 24.7 ° C as compared with the prior art, and the temperature of the connection structure is large according to this embodiment. You will see a diminishing effect.

Therefore, unlike the prior art, in which the area of the contact portion has to be made large in order to reduce the rise of heat generated therein, the connection structure can be made small, so that the cost can be reduced and the safety requirement can be satisfied.

In addition, according to the first embodiment, since the cover is integrally molded to cover the outer circumferential surface of the distal end of the body, there is no fear of moisture or foreign matter from penetrating from the outside, thereby providing excellent waterproofing and antifouling functions compared to the prior art.

On the other hand, Figure 4 is a view showing another modified example of the first embodiment, when the outer circumferential surface 14 of the distal end of the body 1 to which the cover 2 is connected to have a concave-convex shape, adhesion with the cover This can be further improved.

(Second Embodiment)

Fig. 5 shows a connection structure according to a second preferred embodiment of the present invention, in which Fig. 5a is a side cross-sectional view and Fig. 5b is a sectional view taken along line B-B 'in Fig. 5a. The second embodiment is the same as the first embodiment except that the structure of the cover is different, the same reference numerals are used for the same components, and overlapping descriptions will be omitted.

As can be seen in Figures 5 (a) and 5 (b), the cover 12 includes a contact portion 12b having a U-shaped cross section in contact with the conductor bar and a plurality of thermal conductive guide portions 12a coupled thereto. Doing. The plurality of thermal conductive guides 12a may have a plate shape extending in the longitudinal direction of the conductor bar 3, and may correspond to a plurality of conductor bars 3 positioned in the cover 12 to correspond to the number and location of the conductor bars 3. It is arranged.

According to the thermal conductivity formula, i.e., thermal conductivity (q) = -kA dT / dx (k is a heat transfer coefficient), the thermal conductivity is proportional to the cross-sectional area A, and in order to increase the thermal conductivity of the connecting portion, the larger the cross-sectional area of the thermal conductive guide portion 12a is desirable. Do.

FIG. 6 is a view for explaining the flow of heat in the connection structure according to the second embodiment, and according to the present embodiment, as can be seen in the movement path 5 of heat, heat generated in the conductor bar 3 is a conductor. It can be seen that it is conducted along the heat conduction guide portion 12a via the contact portion 12b in contact with the bar 3 and dissipated to the outside by the heat conduction method.

Table 2 below shows a connection structure and a related art according to the second embodiment in which a cover is formed of an engineering plastic (0.4 to 2.5 kcal / mh ° C.) having a higher thermal conductivity than that of air (0.00221 / 20 ° C. to 0.00234 / 40 ° C.). The temperature test comparison table of the connection structure by

(Table 2)

Conventional connection conductor bar Temperature (℃) Example of Conductor Bar Temperature (℃) Temperature difference (℃) R phase 97.4 R phase 75.5 21.9 S phase 100.5 S phase 78.5 21.5 T phase 97.1 T phase 76.1 21.4 N phase (without current) 85.1 N phase (without current) 67.7 17.3

As can be seen from Table 2, according to the present embodiment, it can be seen that the temperature difference between each phase of the conductor bar is 17.3 to 21.9 ° C compared with the prior art, and the temperature of the connection structure is large according to this embodiment. You will see a diminishing effect.

Unlike the first embodiment, the second embodiment has a constant air gap between the conductor bar 3 and the cover 12, but heat is conducted through the contact portion 12b and the heat conduction guide portion 12a. Compared with the first embodiment, the generation of tropical flow is less than that of the first embodiment, and the amount of material used for the cover can be reduced, and the cover can be easily disassembled.

In addition, even in the case of the second embodiment, since the cover can be molded directly on the outer peripheral surface of the distal end of the body or bonded by epoxy bonding, there is no risk of water or foreign matter penetrating into the cover, so that the waterproof and antifouling functions This is excellent. Of course, in this case as well, if the outer circumferential surface of the distal end of the body is formed in an uneven shape as in the first embodiment, the contact with the cover may be higher.

On the other hand, in the second embodiment, the shape of the contact portion in contact with the conductor bar is formed so that the cross-section is U-shaped, but can be formed in a variety of shapes that can widen the contact area with the conductor bar according to the shape of the conductor bar If the contact portion is insulated, such as covering the outer surface of the contact portion with an insulating sheet, the material of the cover may be a metal such as aluminum, copper, tungsten, or a nonferrous metal having good thermal conductivity, in addition to the material of the cover described above in the first embodiment.

In the present embodiment, the heat conductive guide portion and the contact portion have been described with the cover formed of the same material, but may be formed differently from the various thermal conductive materials described above.

Since the present invention can be applied to the connection portion of all the distribution lines according to the prior art, it is applied to the connection portion of the distribution line installed outdoors, underground underground wards of power plants, harbors, ships, oceans, plants, refineries, buildings, apartment complexes It is possible to apply to the connection part of the distribution pipe line installed in the ceiling, floor, wall, ground, tunnel, roof, etc. of various facilities.

1 is a perspective view according to a first preferred embodiment of the present invention.

FIG. 2 is a schematic side cross-sectional view taken along line AA ′ of FIG. 1.

3 is a view schematically showing the movement of heat in the connection portion.

Fig. 4 is a side sectional view schematically showing another modification of the first embodiment.

Figure 5 (a) is a schematic side cross-sectional view according to a second preferred embodiment of the present invention, Figure 5 (b) is a schematic cross-sectional view taken along line BB '.

6 is a view schematically showing the movement of heat in the connection portion.

7 is an exploded perspective view of a connection part according to the prior art.

8 is a perspective view of a connection part not shown in another prior art cover.

Fig. 9 (a) is a side cross-sectional view schematically showing the movement of a column of a conventional connection portion, and Fig. 9 (b) is a sectional view.

* Description of the symbols for the main parts of the drawings *

1: body 2, 12: cover

3: conductor bar 4, 14: outer peripheral surface of the distal end of the body

5: Heat movement path

12a: thermal conductivity guide portion 12b: contact portion

Claims

A plurality of conductor bars exposed from two adjacent bodies and connected to each other; And

And a cover surrounding an outer circumferential surface of the distal end of the body to which the conductor bar and the conductor bar are exposed.

The cover is formed of a material having a higher thermal conductivity than air, and the contact portion structure in contact with the plurality of conductor bars to conduct heat generated from the conductor bars to dissipate to the outside.

The connection structure of claim 1, wherein the cover is integrally molded by contacting the plurality of conductor bars and the outer peripheral surface of the distal end to hermetically surround the outer peripheral surfaces of the plurality of conductor bars and the distal end.

According to claim 1, The cover is a U-shaped cross section in contact with the conductor bar, and a plurality of heat conduction is disposed corresponding to the conductor bar in the plate shape extending in the longitudinal direction of the conductor bar and coupled with the contact portion. Connection structure including guide part.

The connection structure according to any one of claims 1, 2 and 3, wherein the material comprises any one of COOLPOLY, epoxy resin, engineering plastic or rubber.

5. The connection structure of Claim 4, wherein the material further comprises at least one of polyethylene and mica powder.

The connection part structure of any one of Claims 1, 2, 3 in which the unevenness | corrugation was formed in the outer peripheral surface of the said terminal part.

4. The connection structure of Claim 3, wherein the material is metal.

The connection structure according to claim 7, wherein the contact portion wraps the outer surface with an insulating sheet.