KR20100008359A

KR20100008359A - Fusion bonded-type connector using double wall pipe

Info

Publication number: KR20100008359A
Application number: KR1020090126619A
Authority: KR
Inventors: 최지호
Original assignee: 폴리텍 주식회사
Priority date: 2009-12-18
Filing date: 2009-12-18
Publication date: 2010-01-25

Abstract

PURPOSE: A fusion connector member using a double-wall pipe is provided to connect plastic pipes of different diameters or having an uneven surface easily. CONSTITUTION: A fusion connector member using a double-wall pipe comprises a cylindrical body(110) in which an electric heating wire(120) is arranged along the inner surface. Two plastic pipes(P1,P2) are inserted from both ends of the body and welded to the body. The body has a spiral hollow portion(112) in which compressed air is guided.

Description

Fusing type connecting member using double wall pipe {FUSION BONDED-TYPE CONNECTOR USING DOUBLE WALL PIPE}

The present invention relates to a fusion splicing member, and more particularly, a heating wire is provided on an inner circumferential surface and a main body having a spiral hollow portion formed therein, so that compressed air is introduced into the hollow portion during fusion operation to connect molten resin. To the fusion-type connecting member using double wall pipe, which can be made to move to the outer diameter side of the synthetic resin pipe to be connected to the synthetic resin pipe having a large tolerance of the outer diameter, or to make the outer diameter surface easily fused to the synthetic resin pipe. It is about.

In general, synthetic resin pipes have almost no material eluting from the pipes themselves, are not corrosive, and have the advantages of being semi-permanent unless they are artificially damaged, and having low material and construction costs. It is used for various purposes such as sewer pipes and drain pipes. Gas pipes and water pipes are manufactured to have a constant thickness, inner diameter, and outer diameter due to the characteristics of gas, but sewage pipes and drainage pipes are manufactured with large allowable tolerances such as thickness, inner diameter, and outer diameter depending on the production environment.

Since these synthetic resin tubes are made to a certain length, the sage is used to connect with each other to obtain the desired length. Various methods are provided for the connection, but most of the methods using heat are electro-fusion (EF) methods. This situation is being used.

1 is a cross-sectional view showing a conventional cylindrical connecting member, and Figure 1b is a cross-sectional view showing a conventional semi-cylindrical connecting member.

Referring to FIG. 1, the connecting member 10 has a cylindrical body 12. On the inner circumferential surface of the cylindrical body 12 a heating wire 14 is disposed along the inner circumferential surface, each end of the heating wire 14 is exposed on the outer circumferential surface of the body 12, each end of the exposed heating wire 14 is It is connected to the ground terminal 16 disposed on the outer circumferential surface of the cylindrical body 12.

As shown, the above-described cylindrical connecting member 10 is used to connect one synthetic resin pipe (P1) and another synthetic resin pipe (P2).

By the way, the conventional cylindrical connecting member 10 can be easily used in gas pipes and water pipes having a constant outer diameter, but in the synthetic resin pipes such as sewage pipes and drain pipes whose outer diameter is not constant, the cylindrical connecting member 10 and the synthetic resin pipes (P1, P2) Due to the poor contact between the cylindrical connection member 10 and the synthetic resin pipes (P1, P2) there was a problem that the fusion is not made smoothly.

The present invention has been made to solve the conventional problems as described above, an object of the present invention is provided with a heating wire on the inner peripheral surface and having a spiral hollow portion formed therein, compressed air flows into the hollow portion during the welding operation Fusion type using a double wall tube that allows the molten resin to be connected to the outer diameter side of the synthetic resin tube to be connected, and thus easily connects to the synthetic resin tube having a large tolerance of the outer diameter, or the outer diameter surface is easily fused to the synthetic resin tube. To provide a connecting member.

In order to achieve the object of the present invention as described above, the present invention,

In the fusion-connected member having a cylindrical body in which the heating wire is disposed along the inner circumferential surface, one synthetic resin tube and another synthetic resin tube is inserted into one end and the other end of the main body and fused to the main body.

The main body provides a fusion-splicing member using a double wall tube in which a hollow portion through which compressed air is guided is formed in a spiral shape.

Preferably the body adopts a double wall pipe.

And the hollow portion exposed to both end surfaces and both end surfaces of the main body is finished by the molten resin layer,

On the outer circumferential surface of the main body is formed a guide protrusion connected to the injection hose in which the compressed air is injected, the guide portion is formed to be connected to the hollow portion the compressed air is introduced into the guide projection.

As described above, the connecting member according to the present invention is provided with a heating wire on the inner circumferential surface and has a main body formed with a spiral hollow portion into which the compressed air flows, thereby connecting the molten resin by the heating wire during the fusion operation. The outer diameter side of the synthetic resin tube can be behaved to have the advantage that the main body can be easily fused to the synthetic resin tube of the connection and the irregular surface of the synthetic resin tube having a different outer diameter.

In addition, the connection member according to the present invention can be used to cut the main body made of a conventional double-walled tube by a predetermined length to reduce the manufacturing cost according to the manufacturing of the connection member as well as to produce a large amount of connection member in a short time. There is an advantage to that.

Hereinafter, with reference to the accompanying drawings will be described for the fusion-type connection member using a double wall tube according to an embodiment of the present invention.

Figure 2 is a cross-sectional view showing a fusion-type connecting member using a double wall pipe according to the present invention, and Figure 3 is an enlarged view of the portion "A" of FIG.

2 and 3, the fusion-type connection member 100 using the double wall pipe according to the present invention is used to connect any one synthetic resin pipe (P1) and another synthetic resin pipe (P2).

The connection member 100 includes a cylindrical body 110 and a heating wire 120 disposed on the inner circumferential surface of the body 110.

First, the main body 110 has a cylindrical shape in which the hollow part 112 is spirally formed therein. That is, the main body 110 is a conventional double-walled tube cut to a predetermined length, and as anyone can see, the double-walled tube is manufactured by extruding a square hollow tube and winding the spirally by using a winding device. You will know.

The guide protrusion 114 is integrally formed on the outer circumferential surface of the main body 110, and the guide part 116 into which the compressed air flows is formed in the guide protrusion 114 so as to be connected to the hollow part 112. The guide protrusion 114 is connected to the injection hose (not shown) for guiding the compressed air. The hollow part 112 exposed to both end faces and both end faces of the main body 110 is closed by the molten resin layer 118. The molten resin layer 118 preferably has the same material as the body 110. That is, the molten resin is fixed in a state in which the molten resin is coated on both end surfaces of the main body 110, thereby closing the hollow part 112 exposed to both end surfaces and both end surfaces of the main body 110.

On the other hand, the heating wire 120 is disposed spirally along the inner peripheral surface of the main body 110. To this end, a spiral fitting groove 122 is formed on the inner circumferential surface of the main body 110 so that the heating wire 120 may be spirally fitted. And each end of the heating wire 120 extends to the outside of both ends of the main body 110 so as not to interfere with the molten resin layer 118, the end of the heating wire 120 extending to both ends of the main body 110, the ground terminal ( 124 is provided.

Preferably, one radial side of the heating wire 124 is fitted into the fitting groove 122, the other radial side of the heating wire 124 is exposed on the inner peripheral surface of the main body 110.

More preferably, two or more heating wires 120 may be wound on the inner circumferential surface of the main body 110 so as not to interfere with each other, and for this purpose, the two or more heating grooves 120 may not interfere with each other. It may be formed spirally along the inner circumferential surface. When two or more heating wires 120 are disposed in this way, the inner circumferential surface of the main body 110 and the outer circumferential surfaces of the synthetic resin pipes P1 and P2 may be melted at a fast time during fusion, thereby reducing the time for the fusion operation. 4)

Hereinafter, the state of use of the fusion-type connecting member 100 using the double wall tube formed as described above will be briefly described.

First, in order to connect one synthetic resin pipe P1 and another synthetic resin pipe P2, the synthetic resin pipes P1 and P2 are respectively inserted into both inner circumferential surfaces of the cylindrical body 110. When the synthetic resin pipes P1 and P2 to be connected are inserted into the main body 110, the welding machine is connected under a state in which a cable (not shown) of a conventional welding machine (not shown) is connected to the ground terminal 124. When activated, a high frequency current is applied to the heating wire 120 through the cable and the ground terminal 124.

As described above, when a high frequency current is applied to the heating wire 120, the heating wire 120 inserted into the fitting groove 122 formed on the inner circumferential surface of the main body 110 melts the surface of the inner circumferential surface of the main body 110. The heating wire 120 exposed on the inner circumferential surface of the 110, that is, the heating wire 120 exposed to the outside of the fitting groove 122 melts the outer circumferential surfaces of the synthetic resin pipes P1 and P2 inserted into the main body 110. At this time, when the high-frequency current is applied to the heating wire 120, and supplying compressed air through the guide protrusion 114, the compressed air is introduced into the hollow portion 112 through the guide portion 116, the hollow portion ( Compressed air flows into the 112 is to melt the resin melted on the inner peripheral surface of the main body 110 toward the synthetic resin pipe (P1, P2) side to be fused with the molten resin on the outer peripheral surface of the synthetic resin pipe (P1, P2). That is, the compressed air swells the hollow part 112 to cause the resin melted on the inner circumferential surface of the main body 110 to move toward the synthetic resin pipes P1 and P2. Thus, the hollow portion 112 inflated by the compressed air is easily fused even without contacting the inner circumferential surface of the main body 110 due to the difference in the outer diameter of the synthetic resin pipes (P1, P2) to be connected.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims You will understand.

1 is a cross-sectional view showing a conventional cylindrical connecting member, and Figure 1b is a cross-sectional view showing a conventional semi-cylindrical connecting member,

2 is a cross-sectional view showing a fusion-type connecting member using a double wall pipe according to the present invention,

3 is an enlarged view of a portion “A” of FIG. 2, and

4 is a view showing another embodiment of the fitting groove shown in FIG.

Explanation of symbols on the main parts of the drawing

100: fusion splicing member using double wall pipe

110: main body 112: hollow part

114: guide protrusion 116: guide

118: molten resin layer 120: heating wire

122: fitting groove 124: ground terminal

Claims

In the fusion-type connection member having a cylindrical body in which the heating wire is disposed along the inner circumferential surface, one synthetic resin tube and another synthetic resin tube is inserted into one end and the other end of the main body and fused to the main body,

The main body is a fusion-type connecting member using a double wall pipe, characterized in that the hollow portion is guided to the inside of the compressed air is formed spirally.

The fusion-splicing member according to claim 1, wherein the main body is a double wall pipe.

The fusion-splicing member of claim 1, wherein the hollow portions exposed to both end surfaces of the main body and the both end surfaces are closed by a molten resin layer.

According to claim 1, On the outer circumferential surface of the main body is formed integrally with a guide projection connected to the injection hose into which the compressed air is injected, The guide projection is formed to be connected to the guide portion through which the compressed air is introduced Fusion type connection member using a double wall pipe, characterized in that.