KR102063978B1 - Electrofusion type socket - Google Patents

Abstract

The disclosed electrofusion type pipe socket comprises: a tubular pipe socket main body into which a pipe member is inserted; a wire unit including an electrothermal wire installed at the pipe socket main body and comprising a fusion heat wire generating heat for welding the pipe socket and the pipe member inserted therein each other, and a pair of connectors connected to both ends of the fusion heat wire and disposed to be exposed to the outer circumferential surface of the pipe socket main body; and an alignment unit protruding from the inner circumferential surface of the pipe socket main body to closely contact the outer circumferential surface of the pipe member when the pipe member is inserted into the pipe socket main body. The alignment unit maintains a specific size of a gap between the outer circumferential surface of the pipe member and the inner circumferential surface of the pipe socket main body and simultaneously prevents leakage of a molten liquid in which the pipe socket main body and the pipe member are molten.

Description

ELECTRO FUSION TYPE SOCKET

DISCLOSURE The present invention relates to an electrofusion welded pipe including flame retardancy, and more particularly, to an electrofusion welded pipe that can prevent leakage of a melt generated during melting of a pipe member and a pipe main body. .

This section provides background information related to the present disclosure which is not necessarily prior art.

Around residential areas, water supply for drinking water and sewage to discharge sewage are essential. In recent years, construction of energy sources such as city gas and plumbing facilities that supply hot water for heating has also increased.

In general plumbing work, a buried pipeline is first formed, and then pipes are continuously arranged in the buried pipeline. Pipes continuously arranged are hermetically connected using separate joint pipes.

Among the methods of hermetically connecting the joint pipe and the pipe, the method of using the electric fusion joint pipe is easy to use, the construction time is short, and the mass cost is reduced by using the joint pipe which is mass-produced. have.

According to the related art for pipe connection using a joint pipe, a problem arises in that the molten liquid of the joint pipe and the pipe is leaked to both sides of the joint pipe.

If the melt leaks, the pressure between the fitting pipe and the pipe is lowered, which may result in poor fusion characteristics.

If the fusion characteristics between the fitting pipe and the pipe is poor, the problem that the fluid flowing inside the pipe can flow out between the pipe and the pipe.

In this regard, Korean Patent Publication No. 10-1103024 discloses a technique for preventing leakage of the melt, but this is to prevent the melt from leaking through the gap between the terminal pin and the joint pipe, It does not solve the problem of leakage of melt in both directions of the tube.

1. Korean Registered Patent Publication No. 10-1103024

DISCLOSURE OF THE INVENTION An object of the present invention is to provide an electrofusion joint pipe which can prevent leakage of a melt generated during melting of a pipe member and a pipe body.

Here, a summary of the present invention is provided, which should not be understood as limiting the scope of the present invention (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, the electrofusion welded tube according to any aspect of the various aspects of the present invention, the tubular joint pipe body is inserted into the tube member; A heating wire installed at the joint pipe body and including a fusion heating wire for generating heat for fusion bonding the joint pipe and the pipe member inserted therein, and connected to both ends of the fusion heating wire to an outer peripheral surface of the joint pipe body. A wire portion including a pair of connectors disposed to be exposed; And an alignment portion protruding from an inner circumferential surface of the fitting pipe body to be in close contact with the outer circumferential surface of the pipe member when the pipe member is inserted into the fitting pipe body. The gap between the inner circumferential surface of the joint pipe body is kept to a certain size, and at the same time, the joint pipe body and the pipe member prevent leakage of the molten melt.

In the electrofusion joint tube according to an aspect of the present invention, the alignment portion, the first alignment protrusion formed on both ends of the longitudinal direction of the joint pipe body, and the inside of the joint pipe body And a second alignment protrusion formed at a position where the end of the tubular member is disposed in a state where the member is inserted.

In the electrofusion joint tube according to another aspect of the present invention, the alignment portion is formed by protruding from the second alignment protrusion, inserted into the joint tube body, the two end surfaces of each of the two facing each other It may further include a spacer for spacing between both end surfaces of the tube member.

In the electrofusion joint according to another aspect of the present invention, the first alignment protrusion is located adjacent to the inner side of the fitting tube body, is formed in the inner peripheral surface of the fitting tube body, the fitting tube The main body or the tubular member may further include a receiving portion for receiving a molten liquid.

In the electrofusion joint according to another aspect of the present invention, the heating wire, the heating wire is disposed between the receiving portion and the fusion heating wire, further comprising a blocking heating wire constituting a parallel circuit with the fusion heating wire. Can be.

In the electrofusion joint pipe according to another aspect of the present invention, the blocking heating wire is disposed closer to the outer circumferential surface of the tube member than the welding heat wire.

In the electrofusion joint according to another aspect of the present invention, the gap at the position where the blocking hot wire is disposed is smaller than the gap at the position where the fusion hot wire is disposed.

In the electrofusion welded tube according to another aspect of the present invention, the blocking heating wire has a lower electrical resistance and a melting current than the welding heat wire, and the melting current is the joint pipe body and the tube member. It is the minimum current that generates heat to the temperature to melt.

In the electrofusion joint according to another aspect of the present invention, the sum of the current flowing in the blocking heating wire and the fusion heating wire is equal to or less than the melting current of the fusion heating wire, and the current flowing in the blocking heating wire is It is higher than the melting current of the blocking hot wire.

In the electrofusion joint according to another aspect of the present invention, the maximum allowable current of the blocking heating wire is higher than the melting current of the blocking heating wire and lower than the melting current of the welding heating wire.

In the electrically fusion spliced tube according to another aspect of the present invention, the wire portion is disposed between the blocking heating wire and the connector to form a series circuit, the maximum allowable current is the melting of the blocking heating wire And further comprising a blocking hot wire blocking fuse that is higher than a current and lower than the melting current of the fusion heating wire, and wherein the fuse flows between the connector and the blocking heating wire when the current flowing in the blocking heating wire becomes greater than the melting current of the blocking heating wire. Disconnect the electrical connection.

According to the present invention, in the process of inserting the tube member into the joint pipe body, by placing the alignment portion in close contact with the outer peripheral surface of the tube member, thereby controlling the separation distance between the outer peripheral surface of the tube member and the heating wire, It is possible to prevent the leakage of the melt generated during the melting process.

According to the present invention, by using the accommodation portion disposed adjacent to the alignment portion, it is possible to accommodate the molten liquid to prevent leakage of the molten liquid.

1 is a perspective view showing one embodiment of an electrofusion welded tube according to the present invention;
FIG. 2 is a view of a portion of the pipe and fitting body in FIG. 1;
3 is an enlarged front view of region A in FIG. 2;
Figure 4 is a front view showing another embodiment of the electrofusion splicing pipe according to the present invention.
Figure 5 shows another embodiment of the electrofusion splicing tube according to the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS Hereinafter, embodiments of implementing the electrofusion welded pipe according to the present invention will be described in detail with reference to the drawings.

However, the intrinsic technical spirit of the present invention is not limited to the embodiments described below by the embodiments described below, but by the person skilled in the art based on the intrinsic technical spirit of the present invention It turns out that the embodiments described in the present invention encompass the range that can be easily proposed by the method of substitution or modification.

In addition, the terms used below are selected for convenience of description, and therefore, in grasping the intrinsic technical idea of the present invention, the terminology used herein is not limited to a dictionary meaning and is properly interpreted in a meaning that corresponds to the technical idea of the present invention. Should be.

1 is a perspective view showing an embodiment of an electrofusion welded tube according to the present invention, and FIG. 2 is a view in which a portion of the pipe and the fitting body is cut in FIG. 1. 3 is an enlarged front view of region A in FIG. 2.

1 to 3, the electric fusion splicing tube according to the present invention includes a joint pipe body 100, the wire portion 200 and the alignment portion 300.

The joint pipe main body 100 is tubular, and the pipe members 1 and 2 are inserted therein.

The wire part 200 includes a heating wire 210 and connectors 221 and 222. The heating wire 210 is provided in the joint pipe main body 100 and includes a fusion hot wire 211 for generating heat for fusion bonding the joint pipe main body and the pipe members 1 and 2 inserted therein.

The connectors 221 and 222 are connected to both ends of the fusion heating wire 211 and are disposed to be exposed to the outer circumferential surface of the fitting pipe main body 100.

The alignment unit 300 is formed to protrude from the inner circumferential surface of the joint pipe main body 100, so that when the pipe members 1 and 2 are inserted into the joint pipe main body 100, the alignment unit 300 closely adheres to the outer circumferential surfaces of the pipe members 1 and 2. do.

The alignment unit 300 maintains a gap between the outer circumferential surface of the tube members 1 and 2 and the inner circumferential surface of the joint tube body 100 at a specific size, and at the same time, the joint tube body 100 and the tube members 1 and 2 Prevents leakage of molten melt.

That is, in the electrofusion joint tube according to the present invention, the tube members 1 and 2 and the fitting tube main body 100 are maintained by maintaining a specific length of the distance from the surfaces of the tube members 1 and 2 to the heating wire 210. The fusion characteristic of) can be kept uniform.

In addition, since the melt does not leak to the outside of the fitting pipe body 100, defects occurring in the fusion process can be minimized.

1 to 3, in the electrofusion joint according to the present embodiment, the alignment unit 300 includes a first alignment protrusion 311 and a second alignment protrusion 312.

The first alignment protrusion 311 is formed at both ends in the longitudinal direction of the fitting pipe main body 100, and the second alignment protrusion 312 is positioned inside the fitting pipe main body 100 and is a tube member 1, 2. ) Is formed at the position where each end is arranged in the inserted state.

The first alignment protrusion 311 and the second alignment protrusion 312 align the axes of the joint pipe main body 100 and each of the two tube members 1 and 2 facing each other side by side.

That is, the axes of the pipe members 1 and 2 are aligned with each other, and at the same time, the axes of the pipe members 1 and 2 and the axes of the joint pipe body 100 are automatically aligned.

By thus aligning each axis, the above-described gap can be controlled to a specific value.

In addition, in the electrofusion joint tube according to the present embodiment, the alignment unit 300 is formed by protruding from the second alignment protrusion 312, and inserted into the body of the fitting tube, so that both end surfaces thereof face each other. It may further include a spacer projection (312b) for spacing between both end surfaces of 1, 2).

The spacer 312b has the same length that the two tube members 1 and 2 are inserted into the interior of the joint pipe main body 100.

In addition, in the electrofusion joint tube according to the present embodiment, the second alignment protrusion 312 may further include a tapered portion 312a having a larger diameter in the direction in which the tube members 1 and 2 are inserted.

The taper portion 312a guides the pipe members 1 and 2 inserted into the fitting pipe body 100 so that the pipe members can be easily inserted into the second alignment protrusion 312.

1 to 3, the electric fusion splicing tube according to the present embodiment is located inside the joint tube body 100 adjacent to the first alignment protrusion 311, and the It further includes a receiving portion 321 formed in the inner peripheral surface.

The accommodation part 321 accommodates the molten liquid in which the joint pipe main body 100 or the pipe members 1 and 2 were melted.

4 is a view showing another embodiment of the electrofusion welded pipe according to the present invention.

Referring to FIG. 4, in the electrofusion joint tube according to the present embodiment, the accommodating part 321 may include a sealing accommodating part 321a and a sealing membrane 321b disposed radially from the first alignment protrusion 311. It includes more.

The sealing film 321b is formed to be inclined in the direction in which the melt is leaked, and the melt contained in the sealed container 321a may not be eluted out of the sealed container again.

The melt contained in the sealed container 321a raises the pressure inside the sealed container 321a by the pressure, and improves the adhesion between the first alignment protrusion 311 and the outer circumferential surfaces of the pipe members 1 and 2. .

5 is a view showing another embodiment of the electrofusion welded pipe according to the present invention.

Referring to FIG. 5, in the electric fusion splicer according to the present embodiment, the heating wire 210 is disposed between the receiving portion 321 and the fusion heat wire 211, and forms a parallel circuit with the fusion heat wire 211. A blocking hot wire 213 is further included.

The blocking heating wire 213 according to the present embodiment is disposed outside the fusion heating wire 211 inside the fitting pipe main body 100. When the joint pipe main body 100 and the pipe members 1 and 2 are fused and cooled by the blocking heating wire 213, the joint pipe main body 100 and the pipe members 1 and 2 are fused by the fusion heat wire 211. Can melt the eluted solution.

That is, when the blocking heating wire 213 generates heat earlier than the fusion heating wire 211 and fusions and cools the joint pipe main body 100 and the pipe members 1 and 2, the space where the fusion heating wire 211 is disposed is outside. It is isolated and sealed.

Therefore, the melt does not leak, and the accuracy of the operation of the indicator 110 shown in FIG. 1 may be improved.

The indicator 110 is a through hole artificially formed to discharge the melt.

By checking the molten liquid discharged through the indicator 110, it is possible to check whether the welding operation is normally performed inside the fitting pipe main body 100.

In another embodiment of the electrofusion splicing pipe according to the present invention, the blocking heating wire 213 may be arranged closer to the outer circumferential surface of the pipe members 1 and 2 than the fusion heating wire 211. By being disposed close to the tube members 1 and 2, the inner surface of the joint tube members 1 and 2 and the outer surface of the tube members 1 and 2 can be fused with little electric energy.

At this time, in the electrofusion joint tube according to the present embodiment, the gap at the position where the blocking heating wire 213 is preferably disposed is smaller than the gap at the position where the fusion heating wire 211 is disposed.

In addition, in the electric fusion spliced tube according to the present embodiment, the blocking heating wire 213 has lower electrical resistance and melting current than the fusion heating wire 211. At this time, the melt current is a minimum current that generates heat at a temperature at which the joint pipe main body 100 and the pipe members 1 and 2 are melted.

As described above, the blocking heating wire 213 and the fusion heating wire 211 constitute a parallel circuit. Therefore, the electric current flowing in this circuit flows more to the blocking heating wire 213.

The power consumption consumed at the load is calculated as P (power consumption) = I (current) ² x R (resistance). Therefore, the power consumed by the blocking heating wire 213 among the blocking heating wire 213 and the fusion heating wire 211 connected in parallel is larger.

Therefore, when a constant voltage V is applied to the connector, since the power consumption consumed by the blocking heating wire 213 is greater, the blocking heating wire 213 may generate heat before the fusion heating wire 211.

The sum of the currents flowing through the blocking heating wire 213 and the fusion heating wire 211 is preferably equal to or less than the melting current of the fusion heating wire 211. At the same time, the current flowing through the blocking hot wire 213 is higher than the melting current of the blocking hot wire 213.

In addition, in the electrofusion joint tube according to the present embodiment, the maximum allowable current of the blocking heating wire 213 is higher than the melting current of the blocking heating wire 213 and lower than the melting current of the fusion heating wire 211.

In another embodiment of the electrofusion splicing pipe according to the present invention, the wire portion 200 is disposed between the blocking heating wire 213 and the connector to form a series circuit, and the maximum allowable current is the melting current of the blocking heating wire. It may further include a blocking hot wire blocking fuse higher than and lower than the melting current of the fusion hot wire.

When the current flowing through the blocking hot wire 213 becomes larger than the melting current of the blocking hot wire 213, the blocking hot wire blocking fuse melts and is blown. At this time, the electrical connection between the connectors 221 and 222 and the blocking hot wire 213 is cut off so that all current flows to the fusion hot wire 211.

That is, when the current flowing through the blocking hot wire 213 reaches its melting current, the blocking hot wire 213 generates heat, and locally joins the joint pipe main body 100 and the pipe members 1 and 2 to each other.

When the current flowing in the blocking hot wire 213 exceeds the melting current of the blocking hot wire 213, the blocking hot wire blocking fuse is blown.

Since the blocking heating wire 213 and the fusion heating wire 211 constitute a parallel circuit, when the blocking heating wire blocking fuse is blown, the entire amount of current flowing through the connectors 221 and 222 flows through the fusion heating wire 211.

Accordingly, the fusion heating wire 211 generates heat to fuse the joint pipe body 100 and the pipe members 1 and 2.

Claims (11)

A tubular joint pipe body into which the pipe member is inserted;
An electric heating wire installed on the joint pipe body and including a fusion heating wire which generates heat for fusion bonding the joint pipe and the pipe member inserted therein; and an outer circumferential surface of the joint pipe body connected to both ends of the fusion heating wire. A wire portion including a pair of connectors disposed to be exposed to the wire; And
And an alignment part protruding from an inner circumferential surface of the joint pipe body to closely contact an outer circumferential surface of the pipe member when the pipe member is inserted into the joint pipe body.
The alignment unit,
Maintains a gap between the outer circumferential surface of the pipe member and the inner circumferential surface of the joint pipe body at a specific size, and at the same time prevents leakage of the molten liquid from the joint pipe body and the pipe member;
The alignment unit,
First alignment protrusions formed at both ends of a longitudinal direction of the fitting pipe body;
A second alignment protrusion which is positioned inside the joint pipe body and is formed at a position where an end of the pipe member is disposed in a state where the pipe member is inserted; And
And a spacing protrusion protruding from the second alignment protrusion and inserted into the joint pipe main body so as to be spaced apart from both end surfaces of the two pipe members, wherein both end surfaces thereof face each other.
And an accommodating part disposed in the inner side of the fitting tube body adjacent to the first alignment protrusion and recessed on an inner circumferential surface of the fitting tube body to accommodate the molten liquid in which the fitting tube body or the tube member is melted.
The heating wire,
A blocking heating wire disposed between the receiving portion and the fusion heating wire, and forming a parallel circuit with the fusion heating wire,
The blocking heating wire,
And an fusion spliced tube arranged closer to the outer circumferential surface of the tube member than the fusion heating wire. delete delete delete delete delete The method according to claim 1,
The gap at the position where the blocking hot wire is disposed is smaller than the gap at the position where the fusion hot wire is disposed. The method according to claim 1,
The blocking heating wire,
Lower electrical resistance and melting current than the fusion heating wire,
The melting current is,
And a minimum current which generates heat at a temperature for melting the joint pipe body and the pipe member. The method according to claim 8,
The sum of the currents flowing in the blocking heating wire and the fusion heating wire is equal to or less than the melting current of the fusion heating wire,
And the current flowing through the blocking hot wire is higher than the melting current of the blocking hot wire. The method according to claim 9,
The maximum allowable current of the blocking heating wire,
Higher than the melting current of the blocking heating wire,
An electric fusion splicer characterized by being lower than the melting current of the fusion heating wire. The method according to claim 10,
The wire portion,
Further comprising a blocking hot wire blocking fuse disposed between the blocking hot wire and the connector, the maximum allowable current being higher than the melting current of the blocking heating wire and lower than the melting current of the fusion heating wire,
And the fuse cuts an electrical connection between the connector and the blocking heating wire when the current flowing through the blocking heating wire becomes larger than the melting current of the blocking heating wire.

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