KR101666912B1

KR101666912B1 - Pipe for protecting communications line

Info

Publication number: KR101666912B1
Application number: KR1020160058792A
Authority: KR
Inventors: 조광현
Original assignee: 영진산업 주식회사
Priority date: 2016-05-13
Filing date: 2016-05-13
Publication date: 2016-10-17

Abstract

The present invention relates to a protective pipe for a communication line, which has a double pipe structure in which a plurality of inner pipes are inserted into an outer pipe and protects a communication line such as an optical cable in a safe state from groundwater, foreign matter or harmful animals. The present invention relates to a communication pipe for a communication line in which a plurality of inner tubes having a smooth tube structure are inserted into an outer tube having a corrugated tube structure, wherein the inner tubes are formed by a structure in which apical protrusions are formed on the outer circumferential surface, The protrusions of the inner tubes are in contact with each other at the front and rear positions so that they do not come out of the outer tube even if they are pushed or pulled by the external force, and when the inner tubes are molded on the outer peripheral side of the inner tubes after the inner tubes are molded, And is formed so as to be inserted into the inner circumferential surface of the housing.

Description

{Pipe for protecting communications line}

The present invention relates to a pipe (pipe), and more particularly, to a protective pipe for a communication line which has a double pipe structure in which a plurality of inner pipes are inserted into one outer pipe and protects a communication line such as an optical cable in a safe state from groundwater, .

Various communication cables (hereinafter referred to as "communication lines") such as telecommunication lines and optical cables are installed on the ground by telecommunication carriers and are buried underground now due to factors such as urban beauty. In order to protect the communication line from harmful animals or flood damage, a method of inserting the communication line into the protective pipe for the communication line is used separately for inserting the communication line in the underground.

Representative examples of the related art related to the protective pipe for a communication line include a wire protecting tube disclosed in Patent Document 1 (Patent Document No. 10-2003-0017904) of the prior art document and Patent Document 2 (Korean Patent Laid-open No. 10-2011-0030010 (Hereinafter referred to as the "communication line guard"). Among these, the protective pipe of Patent Document 1 is such that a plurality of inner ducts 10, into which the electric wire 1 is inserted, can be inserted into one outer duct 20, as shown in FIG. Accordingly, the individual electric wires 1 can be inserted into the inner duct 10 independently, and the inner duct 10 is safely protected inside the outer duct 20.

2 shows an example of a protective tube for a communication line which is generally used at present. The protective pipe disclosed in Patent Document 1 has a structure in which not only an external duct 20 as an external appearance but also an internal duct 10 as an internal pipe is also formed of a corrugated pipe whereas only the external pipe 20 ' The inner pipe 10 'is different from the smooth pipe. Particularly, when the protective pipe for communication line of FIG. 2 is manufactured, the inner pipe 10 'is formed and cooled, and then the outer pipe 20' is formed in the liquid phase on the outer peripheral side of the inner pipe 10 ' And the outer tube 20 'are heated separately and fused after cooling the outer tube 20'.

However, when the protective pipe for communication line is installed in the field, the outer pipe 20 'is partly detached from the distal end portion and is coupled to the assembly portion of the manhole. However, since the inner pipe 10' There is a problem that the inner tube 10 'is damaged at a portion welded to the inner tube 10'. Further, since the inner pipe 10 '' positioned at the center among the plurality of inner pipes 10 'is not fixed, there arises a problem that the central inner pipe 10' 'is pushed out as shown in FIG. In addition, as described above, there is a problem that a separate equipment, a working time and a process are required for fusing the contact portion between the inner pipe 10 'and the outer pipe 20' by heating after cooling the outer pipe 20 ' There is also.

Korean Patent Publication No. 10-2003-0017904 (published on March 4, 2003) Korean Patent Publication No. 10-2011-0030010 (published on March 23, 2011)

The present invention has been developed in order to solve the problems of the conventional communication line protective tube as described above, and it is possible to easily peel off the inner tube when peeling off a part of the outer tube for installing the communication tube protective tube on the field, It is possible to prevent the inner pipe located at the center among the plurality of inner pipes from being pushed out to the outside of the outer pipe and to easily connect the inner pipe to the outer pipe when molding the outer pipe without fusing the inner pipe and outer pipe by separate heating operation The present invention provides a protective pipe for a communication line which can be easily opened and closed.

In order to attain the above object, the present invention provides a protective tube for a communication line, in which a plurality of inner tubes having a smooth tube structure are inserted into an outer tube having a corrugated tube structure, wherein the inner tubes have a peak- The protrusions of the inner tubes are brought into contact with each other at the front and rear positions so that even if any one of the inner tubes is pushed or pulled by the external force, the inner tubes are molded at the outer peripheral side of the inner tubes, The protrusion is molded so as to be embedded in the inner circumferential surface of the outer tube.

In the present invention, the peak-like protrusions may be formed in a ring shape along the circumferential direction on the outer circumferential surface of the inner tubes.

In the present invention, the peak-like protrusions may be formed to have a triangular cross-sectional structure with a diagonal of 60 degrees.

The protective pipe for a communication line of the present invention having the above-described configuration has the following effects.

First, when the outer tube is molded on the outer peripheral side of the inner tube, the peaked protrusions formed on the outer peripheral surface of the inner tube are embedded in the inner peripheral surface of the outer tube, so that the protrusions are formed by a mechanical element such as a wedge or a key So that the inner tube is rotated or slid against the outer appearance and does not fall out. Therefore, the outer and inner tubes are coupled simply and firmly without fusing the contact portion between the outer tube and the inner tube with a separate heating device.

Second, when the one end portion of the outer tube is peeled off from the inner tube during the installation work in the field, the portion of the outer tube to be peeled is not fused to the inner tube side as in the conventional case, but the projecting portion of the inner tube is embedded in the inner peripheral surface side of the outer tube It is possible to easily break off one end of the outer tube without damaging the inner tube.

Thirdly, since the molding is performed while the protruding portions are in contact with each other among the adjacent inner tubes, even if any one of the inner tubes (in particular, the inner tube surrounded by the other inner tubes) is pushed or pulled by an external force, As shown in FIG. Therefore, it is possible to safely protect the communication line accommodated in the inner tube without damaging it.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a protective tube of Patent Document 1; FIG.
2 is a perspective view showing an example of a conventional protective pipe for a communication line.
3 is a view showing a state in which one of the inner tubes is pushed out from the protective pipe for the communication line of Fig. 2; Fig.
4 is an exploded perspective view showing an inner tube and an outer tube separated as an embodiment of a protective tube for a communication line according to the present invention.
5 is a side view illustrating one inner tube of a protective pipe for a communication line according to the present invention.
6 is a cross-sectional view of a protective pipe for a communication line according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it should be understood that the following embodiments are provided so that those skilled in the art can understand the present invention without departing from the scope and spirit of the present invention. It is not.

FIG. 4 is an exploded perspective view showing an inner pipe and an outer pipe separated as an embodiment of a protective pipe for a communication line according to the present invention, FIG. 5 is a side view illustrating one inner pipe of a protective pipe for a communication line according to the present invention, Fig. 2 is a cross-sectional view of a protective pipe for a communication line according to the present invention.

4 to 6, the protective pipe for a communication line according to the present invention has a smooth pipe structure inside an outer pipe 100 having a corrugated pipe structure in which a mountain 110 and a valley 120 are repeatedly formed, A double tube having a plurality of internal tubes 200 inserted therein is characterized by the following structure.

First, the inner tubes 200 are formed by extrusion or the like in a structure in which the peaked protrusions 210 are formed on the outer circumferential surface. The protrusions 210 of the inner tubes 200 adjacent to each other are formed as shown in FIG. As can be seen, they can be in contact with each other at the front and back positions. These protrusions 210 may be formed at regular intervals or at regular intervals, but they are advantageous from the viewpoint of manufacturing and advantageous in that the protrusions 210 of the inner tubes 200 are in contact with each other in the fore-and-aft position, It is preferable to be uniformly embedded at an appropriate position on the inner circumferential surface of the outer tube 100 (i.e., the inner surface of the trough 120) as shown in Fig.

4 and 5, the peak-like protrusions 210 are formed in a ring-like shape along the circumferential direction on the outer circumferential surface of the inner tube 200, thereby being embedded uniformly on the inner circumferential surface side of the outer tube 100 As shown in FIG. 6, it is advantageous for the protrusions 210 of the inner tubes 200 to be in contact with each other.

Further, each of the protrusions 210 preferably has a triangular cross-sectional structure with a diagonal angle &thetas; of 60 degrees as shown in an enlarged view of FIG. 5. When the protrusions 210 are formed at an acute angle smaller than 60 DEG, The support strength is weakened due to the load, and when one of the inner tubes 200 is pushed or pulled by the external force, the protrusion 210 may be broken and may be detached from the outer tube 100. If the protrusion 210 is formed at an obtuse angle of greater than 60 degrees There is a high possibility that the inner tube 200 is detached from the outer tube 100 in the action of an external force that pushes or pulls the tube 100 because the depth of the inner tube 100 is lowered into the inner circumferential surface of the outer tube 100 (i.e., the inner surface of the trough 120).

Next, the outer tube 100 is molded on the outer circumferential side of the inner tubes 200 after the inner tubes 200 are formed and cooled. At this time, the protrusions 210 of the inner tube 200 are formed on the inner circumferential surface side of the outer tube 100 . That is, after a plurality of inner tubes 200 are formed by a method such as extrusion, the outer tubes 200 are formed on the outer peripheral side of the inner tubes 200 with a liquid outer appearance material (for example, polyethylene resin) The outer surface material of the liquid phase surrounds the protrusion 210 of the inner tubes 200. As a result, when the outer surface material of the liquid phase is cooled and the molding is completed to the solid outer appearance 100, The projections 210 of the inner tubes 200 are fitted into the inner circumferential surface side of the outer tube 100 (that is, the inner surface of the outer trough portion 120). Considering the dimensions and spacing of the mountain 110 and the valleys 120 forming the corrugation of the outer tube 100, the position of the protrusions 210 of the inner tube 200 is located within the outer valley 120 All the protrusions 210 are not embedded in the inner circumferential surface of the outer tube, but are selectively inserted.

The protective pipe for a communication line according to the present invention comprising the outer tube 100 and the inner tube 200 formed as described above is formed on the outer peripheral surface of the inner tube 200 when the outer tube 100 is molded on the outer peripheral side of the inner tube 200 The molding is completed with the structure in which the peaked protrusions 210 are embedded in the inner peripheral side of the outer tube 100 (i.e., the inner side of the trough 120). The protrusions 210 act as a mechanical element such as a wedge or a key that prevents the inner tube 200 from being rotated or slipped out of the outer tube 100 to thereby prevent the contact between the outer tube 100 and the inner tube 200 It is possible to firmly maintain the combined state of the outer tube 100 and the inner tube 200 without fusing the outer tube 100 with the separate heating device.

In addition, when the protective pipe for communication line of the present invention is installed in the field, one end of the outer tube 100 is detached from the inner tube 200 and joined to an assembling part such as a manhole. At this time, Since the protruding portion 210 of the inner tube 200 is only embedded in the inner circumferential surface of the outer tube 100 instead of being fused to the inner tube 200 as in the conventional case, The one end portion of the outer tube 100 can easily be removed.

On the other hand, since the molding is performed in a state in which the protruding portions 210 are in contact with each other even between adjacent inner pipes 200, any one of the inner pipes 200 (in particular, an inner pipe surrounded by other inner pipes) Even if it is pushed or pulled by an external force, it does not come out from the outer tube 100 as in the conventional case.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, This is possible.

100: Appearance 110: Mountain
120: goal 200: inside
210:

Claims

1. A protective tube for a communication line in which a plurality of inner tubes having a smooth tube structure are inserted in an outer tube having a corrugated tube structure,
The inner tubes are formed in a structure in which the peak-like protrusions are formed on the outer circumferential surface, so that the protrusions of the inner tubes are in contact with each other at the front and rear positions so that even if one of the inner tubes is pushed or pulled by the external force, Wherein the outer tube is formed such that when the inner tubes are formed and then molded on the outer peripheral side of the inner tubes, the protrusions are embedded in the inner peripheral surface side of the outer tube.

The method according to claim 1,
Wherein the peak-like protrusion is formed in a ring shape along the circumferential direction on the outer circumferential surface of the inner tubes.

The method according to claim 1,
Wherein the peak-like protrusion has a triangular cross-sectional structure with a diagonal of 60 degrees.