KR102520378B1 - Method for checking insertion depth of pipe for electrofusion type socket - Google Patents

Abstract

The disclosed method for confirming the insertion depth of a pipe for an electrofusion joint pipe includes a preparation step of preparing an electrofusion joint pipe to be welded, pipes to be connected via the electrofusion joint pipe, and metal targets to be attached to the pipes; A metal target attachment step of attaching the metal targets prepared in the preparation step to the end surfaces of the pipes; and a metal target detection step of scanning and detecting positions of metal targets attached to pipes inserted into the electrofusion joint pipe from the outside of the electrofusion joint pipe using a metal detector.

Description

How to check the pipe insertion depth for electric fusion joint pipe {METHOD FOR CHECKING INSERTION DEPTH OF PIPE FOR ELECTROFUSION TYPE SOCKET}

The present invention (Disclosure) relates to a method for checking the insertion depth of a pipe for an electrofusion type fitting that enables checking the insertion depth of a pipe inserted into an electrofusion type joint pipe during pipe fusion using an electrofusion type joint.

Here, background art related to the present invention is provided, and they do not necessarily mean prior art (This section provides background information related to the present disclosure which is not necessarily prior art).

In general, as a fusion method for connecting pipes such as polyethylene (PE) and polyamide (PA12), a butt fusion joint method in which surfaces of pipes are attached to each other, and pipes to be connected are inserted into an electric fusion type joint pipe to perform electrical welding. A typical example is a fusion joint method in which the inside of a fusion joint pipe and the outside surface of the pipe are melted and attached.

Here, a fusion joint using an electrofusion type joint pipe has recently been widely used because it has a fusion cross-sectional area, a thickness of the fusion portion, and a convenient construction work compared to a butt fusion joint.

However, the conventional electrofusion type joint pipe has a problem in that the operator cannot confirm whether the pipe is inserted into the electrofusion type joint pipe to the design (regulation) depth when the pipe is connected.

That is, the pipes must be inserted into the electro-welded joint by the design depth and welded. Otherwise, a fire may occur due to the exposure of the heated heating wire, and furthermore, if gas or fluid leaks due to poor fusion This can lead to huge casualties and property damage.

In order to solve this problem, 'Korean Patent Registration Publication No. 10-2196835' discloses a magnetism measurement sensor provided on the outside of the socket module after attaching a magnetic identification mark to one end of the pipe and then inserting the pipe into the socket module. Disclosed is a pipe positioning device for checking the position of a pipe with a leading part including a fusion welding system for preventing fire including the same.

However, in 'Korean Patent Registration Publication No. 10-2196835' described above, since the identification mark made of magnetic material is attached to the outer circumference adjacent to the end of the pipe, when the pipe is inserted into the socket module, the identification mark may be removed or the position of the identification mark There was a problem that was displaced.

In addition, in 'Korean Patent Registration No. 10-2196835' described above, since the leading part is installed on the outer surface of the socket module along the aligning part formed inside the socket module, the ends of the pipes must be inserted into the aligning part area, but the ends of the pipes There was a problem with measuring the location.

Korean Registered Patent Publication No. 10-2196835. Korean Registered Patent Publication No. 10-1163495. Korean Patent Publication No. 10-2017-0079187. Korean Patent Publication No. 10-1998-0072372.

The present invention (Disclosure) attaches metal targets that are not magnetized on the end faces of pipes inserted into the electrofusion joint, and induces eddy currents in the metal targets from the outside of the electrofusion joint to determine the end positions of the pipes. An object of the present invention is to provide a method for confirming the pipe insertion depth for an electric fusion joint pipe that enables to check the.

In addition, the problem to be solved by the present invention is not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. It could be.

This section provides a general summary of the disclosure and is not a comprehensive disclosure of its full scope or all of its features).

In order to solve the above problems, a method for checking pipe insertion depth for an electric fusion type joint pipe according to any one of the various aspects describing the present invention, an electro fusion type joint pipe to be welded, and an electro fusion type A preparation step of preparing pipes to be connected via the joint pipe and metal targets to be attached to the pipes; A metal target attachment step of attaching the metal targets prepared in the preparation step to the end surfaces of the pipes; and a metal target detection step of scanning and detecting positions of metal targets attached to pipes inserted into the electrofusion joint pipe from the outside of the electrofusion joint pipe using a metal detector. .

In the preparation step of the method for checking the insertion depth of a pipe for an electrowelded joint pipe according to one aspect of the present invention, the metal target is not magnetized and eddy current is induced by a magnetic field generated by a signal transmitted from a metal detector. can

In the preparation step of the method for checking the insertion depth of a pipe for an electrowelded joint pipe according to one aspect of the present invention, the metal target may be provided in the form of a thin plate having a thickness of 0.1 to 10 mm.

In the metal target attaching step of the pipe insertion depth checking method for an electrofusion joint pipe according to one aspect of the present invention, one side of the metal targets may be attached to the end surfaces of the pipes, respectively.

In the metal target attaching step of the pipe insertion depth checking method for an electrowelded joint pipe according to one aspect of the present invention, the metal targets may be attached to end surfaces adjacent to inner diameters of the pipes.

According to the present invention, since the metal target is attached to the end surface of the pipe, the metal target does not fall off when the pipe is inserted into the electrofusion type joint pipe, and the effect of preventing interference with the heating wire of the electrofusion type joint pipe be able to provide

According to the present invention, since the position of the metal target can be detected in real time using a metal detector, it is possible to provide convenience to the operator in welding work, as well as fire and welding due to poor insertion of the electric welding joint and pipes. It is possible to provide an effect of preventing defects in advance.

1 is a flow chart showing a method for checking the insertion depth of a pipe for an electrically welded joint according to the present invention.
2 is a schematic view of an electro-welded joint, pipes, and a metal detector related to the present invention.
Figure 3 is a schematic diagram of the metal target detection step of Figure 1, Figure 3 (A) is a state in which the end faces of the pipe are inserted to meet the design (regulation) depth, Figure 3 (B) is the end of the pipe A drawing showing the state in which facets are not inserted to the design (regulation) depth.

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, an embodiment in which a method for checking a pipe insertion depth for an electrofusion type joint pipe according to the present invention is implemented will be described in detail with reference to the drawings.

However, the essential (intrinsic) technical idea of the present invention cannot be said to be limited by the embodiments described below, and based on the essential (intrinsic) technical idea of the present invention, a person skilled in the art below It is revealed that the embodiments described in include the range that can be easily proposed as a method of substitution or change.

In addition, since the terms used below are selected for convenience of description, in grasping the essential (intrinsic) technical idea of the present invention, they are not limited to the dictionary meaning and are appropriately interpreted in a meaning consistent with the technical idea of the present invention. It should be.

1 is a flow chart showing a method for checking the insertion depth of a pipe for an electrofusion type joint pipe according to the present invention, and FIG. 2 is a schematic view of an electrofusion type joint pipe, pipes, and a metal detector related to the present invention, and FIG. 3 is It is a diagram schematically illustrating the metal target detection step of FIG. 1 .

1 to 3, the present invention includes a preparation step (S10), a metal target attachment step (S20), and a metal target detection step (S30).

Hereinafter, a method for checking the insertion depth of a pipe for an electrofusion joint pipe according to a preferred embodiment will be described.

Preparation step (S10)

In the preparation step (S10), the electrofusion joint pipe 10 to be welded, the pipes 20 and 30 to be connected via the electrofusion joint pipe 10, and the metal to be attached to the pipes 20 and 30 This is the step of preparing the targets 22 and 32 (S10).

Here, the prepared electrofusion joint pipe 10 and the pipes 20 and 30 are a common technology in the art, and in the present invention, the detailed description of the electrofusion joint pipe 10 and the pipes 20 and 30 omit explanation.

On the other hand, the end surfaces of the pipes 20 and 30 prepared in the preparation step (S10) may be prepared by finely cutting smoothly so that burrs do not occur. This is to smoothly and easily attach the metal targets 22 and 32 to their positions in the metal target attaching step (S20) to be described later.

Preferably, the metal targets 22 and 32 are prepared in the form of thin plates having a thickness of 0.1 to 10 mm.

More preferably, the metal targets 22 and 32 are not magnetized and are provided with metal capable of inducing eddy currents (eddy currents) by a magnetic field generated by a signal transmitted from the metal detector 40 .

Metal target attachment step (S20)

The metal target attachment step (S20) is a step (S20) of attaching the metal targets 22 and 32 prepared in the preceding preparation step (S10) to the pipes 20 and 30.

In the metal target attachment step (S20), the metal targets 22 and 32 are used to avoid interference with the electrofusion type joint pipe 10 when the pipes 20 and 30 are inserted into the electrofusion type joint pipe 10. It is attached on the end faces of the pipes (20, 30).

For example, the metal targets 22 and 32 are attached to the end surfaces of the pipes 20 and 30 via a common adhesive, a common double-sided tape, a common tack pin, and a common fixing bolt.

As a result, even if the pipes 20 and 30 are inserted into the electrofusion joint pipe 10, it is possible to prevent the metal targets 20 and 30 from falling off or being displaced as in the prior art, and also the electrofusion type joint Interference with the heating wire 12 of the pipe 10 can be prevented.

Preferably, the metal targets 22 and 32 are formed along the longitudinal direction of the pipes 22 and 32 at the end faces of the pipes 22 and 32 in sheet grooves (not shown) of the pipes 20 and 30. It can be press-fitted along the longitudinal direction.

And, in the metal target attaching step (S20), the metal targets 22 and 32 may be attached to the end surfaces adjacent to the inner diameters of the pipes 20 and 30. This separates the metal targets 22 and 32 from the outer diameter side of the pipes 20 and 30 that are melted by the heating wire 12 of the electrofusion type joint pipe 10 when fusion is performed with the electrofusion type joint pipe 10. This is to completely prevent an abnormal condition such as a short circuit with the heating wire 12 and an abnormal situation caused by the metal targets 22 and 32 by preventing the metal targets 22 and 32 from moving.

Metal target detection step (S30)

The metal target detection step (S30) detects the positions of the metal targets 22 and 32 attached to the pipes 20 and 30 inserted into the electro-welded joint pipe 10 for welding. This is step (S30).

In the metal target detection step (S30), the metal targets 22 and 32 inserted into the electrofusion joint pipe 10 along the pipes 20 and 30 can be detected from the outside of the electrofusion joint pipe 10. A conventional metal detector 40 is used.

As anyone can know, when a magnetic field is output from the metal detector 40, an eddy current is induced inside the metal targets 22 and 32, and the phase change of the magnetic field caused by this eddy current is detected to detect the effect of the metal target 22 and 32. The position can be accurately detected.

In other words, in the metal target detection step (S30), the location of the metal targets 22 and 32 can be checked in real time by simply scanning the outside of the electro-welded joint 10 using the metal detector 40, As a result, it is possible to check the end positions of the pipes 20 and 30 inserted into the electrofusion type joint pipe 10 .

And in the metal target detection step (S30), the metal target 22 attached to the end surface of any one pipe 20 and the metal target attached to the end surface of another pipe 30 at the set design (regulation) depth ( 32) is detected, it is determined that the pipes 20 and 30 are normally inserted into the electrofusion type joint pipe 10 to the design (regulation) depth, and the electrofusion type joint pipe 10 and the pipes 20 and 30 ) according to the specified conditions.

Here, the fusion joint of the electrofusion type joint pipe 10 and the pipes 20 and 30 is a common technique in the art, and a detailed description thereof is omitted in the present invention.

According to the present invention, since the metal targets 22 and 32 are attached to the end surfaces of the pipes 20 and 30, when the pipes 20 and 30 are inserted into the electrofusion joint pipe 10, the metal target ( 22 and 32) are not eliminated, and interference with the heating wire (12) can be avoided.

In addition, according to the present invention, since the position of the metal targets 22 and 32 can be detected in real time from the outside of the electrofusion type joint pipe 10 using the metal detector 40 without installing a separate device, the operator Not only can provide the convenience of the welding joint work, but also the fusion of the electrofusion type joint pipe 10 and the pipes 20 and 30 due to the non-insertion of the pipes 20 and 30 in the electrofusion type joint pipe 10 Prevent defects and fire occurrences in advance.

Claims (5)

Prepare an electro-welded joint to be welded, pipes to be connected via the electro-welded joint, and metal targets to be attached to the pipes, the end surfaces of which are prepared by micro-cutting smoothly, and the metal A preparation step (S10) in which the targets are provided in the form of thin plates of 0.1 to 10 mm and provided with metal in which eddy currents are induced by the magnetic field generated by the signal transmitted from the metal detector without being magnetized;
A metal target attaching step (S20) of attaching one side surface of the metal targets prepared in the preparation step (S10) to an end surface adjacent to the inner diameter of the pipes using any one of adhesive, double-sided tape, tack pin, and fixing bolt ; and
A metal target detection step of scanning and detecting the positions of the metal targets attached to the pipes inserted into the electrofusion joint pipe from the outside of the electrofusion joint pipe using the metal detector (S30). ); How to check the insertion depth of the pipe for the electrically welded joint pipe comprising a.
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