KR20130033172A

KR20130033172A - Cable tray

Info

Publication number: KR20130033172A
Application number: KR1020110097095A
Authority: KR
Inventors: 이상윤; 임윤석; 김상범; 소준영; 이동일
Original assignee: 한국전력공사
Priority date: 2011-09-26
Filing date: 2011-09-26
Publication date: 2013-04-03

Abstract

PURPOSE: A cable tray is provided to discharge heat generated from a cable by shielding an electromagnetic field generated from the cable. CONSTITUTION: A cable tray comprises a lower case(40), a shielding material(30), a shielding material guide(20), and an upper cover(10). The lower case stores a cable. The shielding material shields a magnetic field of the cable. The shielding material guide is mounted at an upper unit of the lower case and arranges a plurality of the shielding materials along a length direction of the lower case. The upper cover is combined with an upper unit of the channel material guide.

Description

Cable Tray {Cable Tray}

The present invention relates to a cable tray for electromagnetic shielding.

Background Art of the Invention There is a patent document relating to a structure for shielding electromagnetic waves of a distribution line installed in a multi-unit house. Disclosed is an electromagnetic shielding structure of a distribution line for apartment houses that can easily carry out work by blocking leakage and grounding static electricity generated, as well as folding a shielding plate in a required position when maintenance or management is required. have.

KR 0646349 B1 Nov 11, 2006

The present invention proposes a cable tray for electromagnetic shielding having a heat dissipation structure.

According to one aspect of the invention, a cable tray for shielding the electromagnetic field of the cable is disclosed.

The cable tray according to an embodiment of the present invention is mounted on the lower case, the shielding material shielding the magnetic field of the cable, the upper portion of the lower case, the plurality of the shielding material is disposed along the longitudinal direction of the lower case And a top cover coupled to the top of the shield guide and the shield guide to which the shield is mounted.

Here, the plurality of shields are arranged at regular intervals along the longitudinal direction.

The shielding material may include a first shielding material layer in which the plurality of shielding materials are arranged at regular intervals along a length direction, and a second shielding material layer in which a plurality of shielding materials are arranged at a predetermined distance along the length direction on the first shielding material layer. It is arranged to be formed.

Here, the second shielding material layer is disposed shielding material to cover the empty area of the first shielding material layer formed at intervals between the shielding material.

Here, the shielding material guide includes a shielding support on which the shielding material is mounted such that the first shielding material layer and the second shielding material layer are formed.

Here, the shielding material guide is formed in a ladder shape, the shielding material insertion hole is formed is inserted into the shielding material on the side surface so that the shielding material is mounted on the shielding support.

Here, the shielding material is formed in a sheet form, and has a high permeability characteristic.

Here, the upper cover includes a heat dissipation groove for dissipating heat generated from the cable.

Here, the lower case includes a guide support on which the shield guide is raised.

The present invention shields the electromagnetic field generated from the cable and can naturally release heat generated from the cable.

1 is a view showing a cable tray for shielding the electromagnetic field.
2 shows a shield and a shield guide.
3 shows shielding of a magnetic field in a cable tray;

The present invention may be variously modified and have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In addition, numerals (e.g., first, second, etc.) used in the description of the present invention are merely an identifier for distinguishing one component from another.

Also, in this specification, when an element is referred to as being "connected" or "connected" with another element, the element may be directly connected or directly connected to the other element, It should be understood that, unless an opposite description is present, it may be connected or connected via another element in the middle.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the same reference numerals will be used for the same means regardless of the reference numerals in order to facilitate the overall understanding.

1 is a view showing a cable tray for electromagnetic shielding, Figure 2 is a view showing a shield and a shield guide.

1 and 2, the cable tray includes a lower case 40 in which the cable 60 is accommodated, a shielding material 30 shielding the magnetic field of the cable, a shielding material guide 20 on which the shielding material 30 is mounted, and an upper portion thereof. Cover 10.

The lower case 40 may be in the form of a conventional cable tray, and the guide support 41 is installed to mount the shielding guide 20. The shielding guide 20 may be mounted on the lower case 40 by being mounted on the guide support 41. The bottom surface of the lower case 40 may have a high permeability characteristic, and the side surface of the lower case 40 may have a high conductivity characteristic. Through this, the cable tray may shield the electromagnetic field of the cable 60.

The shielding guide 20 is equipped with a plurality of shielding (30). To this end, the shield guide 20 is provided with a shield support (21). The shielding material guide 20 may be formed in a ladder shape in order to mount the shielding material 30 and to be mounted to the lower case 40 through the guide support 41. That is, as shown in FIGS. 1 and 2, the length and width of the shielding guide 20 may be determined according to the length and width of the inside of the lower case 40, and between the pair of bars or bars, the shielding material. 30 may be in the form of a ladder in which the shield support 21 is installed. In addition, the pair of bars or rods are formed with a shielding material insertion hole 22 into which the shielding material 30 is inserted. The shielding material 30 may be mounted on the shielding material guide 21 by being mounted on the shielding material support 21 or being inserted into the shielding material insertion hole 22 and mounted on the shielding material support 21.

The shielding material 30 is formed in a sheet shape and may have a property of high permeability. The shielding material 30 may be mounted on the shielding material guide 20 to form two shielding material layers, and the shielding support 21 may be disposed on the shielding material guide 20 such that the shielding material 30 is disposed. For example, the first shielding material layer in which a plurality of shielding materials 30 are arranged at regular intervals along the longitudinal direction and the second shielding material 30 is arranged at regular intervals along the length direction on the first shielding material layer. A shielding layer is formed. In this case, the second shielding material layer is a shielding material 30 is disposed to cover the empty area of the first shielding material layer formed at intervals between the shielding material 30, the interval between the shielding material 30 is greater than the length or width of the shielding material (30) Should be small. In addition, a space is formed between the first shielding material layer and the second shielding material layer at regular intervals. As described above, heat generated from the cable 60 may be discharged through the empty area formed at the interval between the shielding material 30 and the space formed between the first shielding material layer and the second shielding material layer.

The upper cover 10 is mounted on the shield guide 20 to serve as a cover of the cable tray. The upper cover 10 is formed with a heat dissipation groove 11 for dissipating heat generated from the cable 60. For example, as illustrated in FIGS. 1 and 2, the heat dissipation grooves 11 may be formed in a plurality at regular intervals along the length direction of the upper cover 10.

The lower case 40, the shielding material guide 20, and the upper cover 10 include bolt insertion holes 13, 23, and 42 to be coupled and fixed through the bolt 50.

3 is a diagram illustrating shielding of a magnetic field in a cable tray.

Referring to FIG. 3, the magnetic field formed in the cable tray is formed perpendicular to the direction of the current flowing through the cable 60. Such a magnetic field may be shielded by two shielding layers and a lower case 40 formed of a plurality of shielding materials 30.

Table 1 below shows the results of calculating the shielding factor (SF) according to the overlapping distance L between the upper and lower shielding materials 30 shown in FIG. 3. Here, the shielding rate is calculated by the following equation.

[Equation 1]

SF = magnetic field after shielding / magnetic field before shielding

Distance L (mm) SF Remarks -100 0.50 Magnetic field leakage space blocking critical area between upper and lower shielding materials -75 0.50 -50 0.50 -25 0.51 0 0.51 No overlapping distance between upper and lower shielding materials 25 0.52 50 0.52 75 0.53 100 0.54 125 0.55 150 0.57

In order to measure the magnetic field before and after the shielding, the shielding material 30 is a general 3% oriented silicon steel sheet was used, the permeability is set to 40,000, the maximum, it is assumed that the current flows 100A through the cable 60. In addition, the vertical gap between the upper and lower shields 30 is 100 mm, and the magnetic field for the target point is set to a maximum value along the cable 60 at a distance of 100 mm from the upper shield 30.

As shown in Table 1, the shielding rate is about 50% level can be confirmed a relatively high magnetic field reduction effect, the shielding rate was shown to decrease the shielding effect as the separation distance between the shielding material 30 increases.

In particular, when the overlap distance L between the upper and lower shields 30 is -50 mm, a shielding rate similar to that of the magnetic field leakage space blocking critical region between the upper and lower shields 30 is shown.

As such, the cable tray exhibits a 50% magnetic field reduction as the magnetic field having a high magnetic flux density is concentrated in the waste material 30, and may release heat generated from the cable 60 through the heat dissipation structure.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

10: top cover
11: heat release groove
20: shield material guide
21: shield support
22: shield insert
30: shielding material
40: lower case
41: guide support
60: cable

Claims

In the cable tray shielding the electromagnetic field of the cable,
A lower case accommodating the cable;
A shielding material for shielding the magnetic field of the cable;
A shielding material guide mounted on an upper portion of the lower case and mounted with the shielding material such that a plurality of the shielding materials are disposed along a length direction of the lower case; And
Cable tray comprising a top cover coupled to the top of the shield guide.

The method of claim 1,
The plurality of shielding material is a cable tray, characterized in that arranged at a predetermined interval along the longitudinal direction.

The method of claim 1,
The shielding material
The first shielding material layer is arranged at a predetermined interval along the longitudinal direction and the plurality of shielding material and the second shielding material layer is arranged to form a plurality of shielding materials arranged at a predetermined interval along the longitudinal direction on the first shielding layer The cable tray which features.

The method of claim 3,
The second shielding material layer is a cable tray, characterized in that the shielding material is disposed so as to cover the empty area of the first shielding material layer formed at intervals between the shielding material.

5. The method of claim 4,
The shielding material guide may include a shielding support on which the shielding material is mounted such that the first shielding material layer and the second shielding material layer are formed.

The method of claim 5,
The shielding guide is formed in the form of a ladder, the cable tray, characterized in that the shielding insert is inserted into the shielding member is inserted into the side so that the shielding material is mounted on the shielding support.

The method of claim 1,
The shielding material is formed in a sheet form, characterized in that the cable tray having a high permeability characteristics.

The method of claim 1,
The upper cover is a cable tray, characterized in that it comprises a heat dissipation groove for dissipating heat generated from the cable.

The method of claim 1,
The lower case is a cable tray, characterized in that it comprises a guide support on which the shield guide is raised.