KR101730250B1

KR101730250B1 - Method for connecting thermoplastic pipe

Info

Publication number: KR101730250B1
Application number: KR1020150121241A
Authority: KR
Inventors: 허충식
Original assignee: 주식회사 코모텍
Priority date: 2015-08-27
Filing date: 2015-08-27
Publication date: 2017-04-26
Also published as: KR20170025195A

Abstract

A connection method of a thermoplastic plastic pipe which can easily connect a thermoplastic pipe to be connected without a separate mold for making a connection is proposed. The proposed method comprises the steps of placing a third thermoplastic plastic pipe at the connection between the first and second thermoplastic pipes, wrapping the outer surface of the third thermoplastic pipe with a thermoconductor, applying heat to the thermoconductor, And the first and second thermoplastic pipes are welded together as the thermoplastic pipe is melted.

Description

[0001] METHOD FOR CONNECTING TERMINAL PIPES [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting method of a thermoplastic plastic pipe, and more particularly, to a method of easily connecting a thermoplastic pipe to be connected.

Conventionally, there are two methods for connecting thermoplastic pipes.

The first method is to connect with a mechanical method, a connecting screw, with a screw or fastening method.

The second method is to dissolve the outer surface of the thermoplastic pipe and insert the inner diameter of the connector by melting. 1, the outer surface of the thermoplastic plastic pipe 1 is melted by using a mechanism 2 for applying heat and the mechanism 2 for heating the inner diameter of the connection port 3 as shown in FIG. 2 is used After melting, insert the thermoplastic pipe (1) into the connector (3). 3, the thermoplastic plastic pipe 1 is inserted into the fitting hole 3 in which the electric resistance heating element 4 (for example, hot wire) is disposed, and then the electric current is applied to the electric resistance heating element 4, The outer surface of the connector 1 can be melted and the inner diameter of the connector 3 can be melted.

In such a conventional method, there is a problem in that all of the molds corresponding to the thermoplastic plastic pipe have to be made in order to make the connector 3.

Prior Art 1: Korean Utility Model No. 0212874 Prior Art 2: Korean Utility Model No. 0212875 Prior Art 3: Korean Patent No. 0620785

It is an object of the present invention to provide a connecting method of a thermoplastic plastic pipe that can easily connect a thermoplastic pipe to be connected without a separate mold for making a connecting hole.

According to another aspect of the present invention, there is provided a method of connecting a thermoplastic plastic pipe, comprising: placing a third thermoplastic plastic pipe at a connection portion between first and second thermoplastic pipes; Wrapping the outer surface of the third thermoplastic plastic pipe with a thermal conductor; Applying heat to the heat conductor; And melting the third thermoplastic plastic pipe to fuse the first and second thermoplastic plastic pipes together, the method comprising the steps of:

Wherein the positioning comprises inserting the first thermoplastic plastic pipe and the second thermoplastic plastic pipe into the third thermoplastic plastic pipe, wherein the connecting portion between the first thermoplastic plastic pipe and the second thermoplastic plastic pipe comprises The outer surface and the inner surface of the third thermoplastic plastic pipe are melted due to thermal conduction of the thermoconductor, and the outer surface and the inner surface of the third thermoplastic plastic pipe are melted ; The expansion pressure of the third thermoplastic plastic pipe being transferred to the first and second thermoplastic pipes; And heat is transferred to the first and second thermoplastic pipes by the inflation pressure so that the first and second thermoplastic pipes are welded to each other.

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According to the present invention having such a constitution, after the first and second thermoplastic pipes to be connected are inserted into the third thermoplastic plastic pipe, the third thermoplastic plastic pipe is wrapped with the copper sheet and heat is applied to the copper sheet, The plastic pipe is melted and the first and second thermoplastic pipes melt and fuse together.

Thereby, two thermoplastic plastic pipes can easily be made of one thermoplastic plastic pipe without a separate mold for making the connection.

1 to 3 are views for explaining a conventional thermoplastic plastic pipe connecting method.
4 is a flowchart illustrating a method of connecting a thermoplastic pipe according to an embodiment of the present invention.
Fig. 5 is a diagram adopted in the description of Fig.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the understanding of the present invention, the same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

The present invention basically eliminates the need for a conventional connector in connecting thermoplastic pipes. In the embodiment of the present invention, it is sufficient that a thermoplastic plastic pipe to be connected and a pipe having a size larger than that of the pipe are provided. Table 1 below shows specifications of thermoplastic plastic pipes.

division
standard
   Outside dimension (mm)     Thickness (mm)   at least   maximum   at least maximum
KS
   16    16   16.3   1.5 1.7    20    20   20.3   1.9 2.2    25    25   25.3   2.3 2.7
Normal

   15   15.8    16   1.6 1.8    22   22.1   22.3   2.03 2.29    29   27.9   28.1   2.6 2.8    35   34.8   35.2   3.2 3.5

FIG. 4 is a flowchart illustrating a method of connecting a thermoplastic pipe according to an embodiment of the present invention, and FIG. 5 is a view employed in the description of FIG. In the following description, it is assumed that there are a first thermoplastic plastic pipe 10 and a second thermoplastic plastic pipe 12 to be connected to each other. Here, it is assumed that the first thermoplastic plastic pipe 10 and the second thermoplastic plastic pipe 12 have the same standard.

First, the first thermoplastic plastic pipe 10 and the second thermoplastic plastic pipe 12 to be connected are brought into contact with each other. That is, as shown in FIG. 5, the connecting portions to be connected to each other are brought into contact with each other. Then, place the third thermoplastic pipe 14 at the connection site. In other words, the pipes 10 and 12 to be connected may be inserted into the third thermoplastic plastic pipe 14 (S10). At this time, the connecting portions of the pipes 10 and 12 to be connected may be inserted into the third thermoplastic plastic pipe 14. For example, if the dimensions of the first thermoplastic plastic pipe 10 and the second thermoplastic plastic pipe 12 are KS16, the specification of the third thermoplastic plastic pipe 14 may be KS20. This is possible if there is a pipe to be connected and a pipe that is right above the pipe. 5, G1 and G2 mean a gap between the first thermoplastic plastic pipe 10 (or the second thermoplastic pipe 12) and the third thermoplastic pipe 14. For example, the distances G1 and G2 between the outer surface of the first thermoplastic plastic pipe 10 and the inner surface of the third thermoplastic plastic pipe 14 may be about 6 mm or less, respectively.

Then, a copper plate sheet (for example, aluminum) 16 having a high thermal conductivity is wound around the outer surface of the third thermoplastic plastic pipe 14 (S20). Here, the copper sheet 16 may be an example of the heat conductor described in the claims of the present invention.

Then, heat is applied to the copper sheet 16 (S30). To do this, we first make pipe-shaped clamps made of copper and aluminum with good thermal conductivity. Then, a control device for adjusting the voltage and current is installed by inserting the heat wire into the pipe-shaped clamp and fixing the electric wire. Next, the sensor is installed so that the temperature of the third thermoplastic plastic pipe 14 is not heated to 130 degrees Celsius or more to adjust the voltage and the current. If the temperature is more than 130 degrees Celsius, the third thermoplastic plastic pipe 14 is carbonized to change physical properties and the characteristics of the thermoplastic plastic pipe disappear.

As the copper sheet 16 is heated, the third thermoplastic plastic pipe 14 is melted and the first thermoplastic plastic pipe 10 and the second thermoplastic plastic pipe 12 are fused together (S40). In other words, when the copper sheet 16 on the outer surface of the third thermoplastic plastic pipe 14 is heated, the temperature of the surface of the copper sheet 16 is increased by the heat conduction. As a result, the outer surface of the third thermoplastic plastic pipe 14, which is in contact with the surface of the copper sheet 16, is slowly melted. Thereafter, the inner surface of the third thermoplastic plastic pipe 14 is also melted by heat conduction. At this time, when heat is transferred to the third thermoplastic plastic pipe 14, molecular motion becomes active, and the pipe 14 begins to melt and expansion pressure is generated. Since the outer surface of the third thermoplastic plastic pipe 14 is surrounded by the metal, the inflation pressure is transmitted to the inside of the pipe 14. Accordingly, the heat is also rapidly transferred to the inner pipe (i.e., the first and second thermoplastic plastic pipes 10 and 12), and the pipes to be connected (i.e., the first and second thermoplastic plastic pipes 10 and 12) The outer surface starts to melt and is fused to each other.

However, in the embodiment of the present invention, in the fusion welding, the outer expansion pressure is directed toward the inner surface by the expansion pressure, and the inner pipe is made into a single pipe by utilizing the characteristics of the thermoplastic plastic by the action of the force to maintain the inner diameter. Never exceed the melting point of the pipe.

The properties of the connected pipe are maintained, and even if the pipe is subjected to a hydraulic test, the pressure of the connected pipe is higher than that of the existing pipe, and the connecting portion is never separated.

As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: First thermoplastic plastic pipe
12: Second thermoplastic plastic pipe
14: Third thermoplastic plastic pipe
16: copper sheet

Claims

Placing a third thermoplastic plastic pipe at a connection between the first and second thermoplastic pipes; Wrapping the outer surface of the third thermoplastic plastic pipe with a thermal conductor; Applying heat to the heat conductor; And fusing the first and second thermoplastic pipes to each other as the third thermoplastic pipe is melted, the method comprising:
Wherein the positioning comprises:
Wherein the first thermoplastic pipe and the second thermoplastic pipe are inserted into the third thermoplastic pipe,
Wherein a connection portion between the first thermoplastic pipe and the second thermoplastic pipe is inserted into the third thermoplastic pipe,
Characterized in that the heat conductor is composed of a copper sheet,
Wherein the fusion-
Melting the outer surface and the inner surface of the third thermoplastic plastic pipe by thermal conduction of the thermoconductor;
The expansion pressure of the third thermoplastic plastic pipe being transferred to the first and second thermoplastic pipes; And
And heat is transferred to the first and second thermoplastic pipes by the inflation pressure so that the first and second thermoplastic pipes are welded to each other.

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