KR20090092590A - Electro-fusion connecting apparatus for prevention jointed plastic pipes from seperating - Google Patents

Abstract

An electro-fusion connecting apparatus is provided to prevent main pipes separating from the socket joint due to contraction, by connecting electro-fusion bands of the main pipes using a bolt. An electro-fusion connecting apparatus comprises a socket member(6), first and second electro-fusion ring bands(10,12), first and second flanges(14,16), and a band connecting bolt(18). The socket member connects the ends of two pipes. A packing is mounted on the inner surface of the socket member in order to maintain airtightness. The first and second electro-fusion ring bands are fitted to the exterior of the pipes, and have electric heating wires to be electrically fused on the surface of the pipes. The first and second flanges are protruded on the outer circumference of the first and second electro-fusion ring bands, and have screw holes(14a,16a) in the center. The band connecting bolt is mounted through the screw holes of the first and second flanges, thereby preventing the pipes separating from the socket member.

Description

Electro-fusion connecting apparatus for prevention jointed plastic pipes from seperating}

The present invention relates to an electrofusion connection device for closely connecting the synthetic resin main pipes by using joints such as sockets or couplings, and more specifically, to moisture in the pipe during the joint operation according to the maintenance of the synthetic resin pipes. It is possible to construct a pipe joint by electrofusion even if there is, and to prevent the separation of the joint pipe to prevent the separation of the synthetic pipe main pipe from the joint socket by the main diameter tolerance according to the pipe joint.

In general, synthetic resin pipes have the advantages of almost no material eluting from the pipe itself, there is no fear of corrosion, semi-permanent life, and material and construction costs are low unless there is artificial damage. The synthetic resin pipe is manufactured using materials such as polyethylene (PE), polyvinyl chloride (PVC), and polypropylene (poly propylene / PP), and is used for various purposes such as gas pipes, water pipes, sewage pipes, and drain pipes. have.

Since these synthetic resin pipes are manufactured to a certain length, the pipe joint method is used to obtain a desired length in the field. Among the pipe joint methods, mechanical joints such as flanged pipe joints or threaded socket joints, butt electrofusion methods ( Electro-fusion (EF) and socket type electrofusion methods are used.

Typically, the flange pipe joint is shown in Figure 1, after inserting the other main pipe 101 into the connector tube insertion portion 102 of the main pipe 103 of one side flange 105, the packing 105 is mounted ) And the bolt 104a is used for sealing.

In the above structure, the sealing of the connection part of the main pipes 101 and 103 by the packing 105 is satisfied, but since the connection of the two main pipes 101 and 103 is simply made by a flange coupling by fastening the bolts, When the coupling force between the two main pipes 101 and 103 through 104a becomes weak, there is a fear that leakage of the connection part is easily caused by the pressure acting on the main pipe. In addition, when the joint construction of the main pipe in the field there is a problem that takes a lot of time for the connection work because it must be fastened a number of bolts.

Screwed socket joints are mainly applied to small pipes, and they are connected by the screw joints of the main pipes and sockets and are kept airtight by packings built into the sockets. However, since the above structure depends on the fastening force of the main pipe and the socket, there is a problem that there is a limit in maintaining reliable airtightness.

In the band-type electrofusion method, as shown in FIG. 2A, the main tubes 200 and 200 ′ are horizontally aligned with each other, and the butt portion is wound with the electrofusion connector 220 having the heating wire 210 embedded therein. Secure the ends. Then, power is supplied to the heating wire 210 of the fusion splicer 220 to generate heat, and by this heat the inner surface of the fusion splicer 220 and the outer surface of the main pipe 200 (200 '). It is a method of melting and fusion. This has a problem in that a leakage phenomenon occurs because the welding strength of the overlapping portion overlapping the fusion connector.

In addition, Patent No. 10-07866689 discloses a socket type electrofusion method, which is installed in the inner surface of the socket 300 as shown in FIG. Disclosed is a structure in which the main pipe and the socket 300 are integrated with heat generated from the heating wire 302 by supplying power through the power supply.

The socket type electro fusion (EF) method can be easily used for gas pipes and water pipes having a constant outer diameter. However, the pipe joints by the electro fusion (EF) method have a problem that maintenance is difficult because they cannot be separated after fusion.

In particular, while the electric fusion method is useful for the new pipe joint work, the pipe joint construction has a problem that the construction and repair work is impossible due to short circuit or electric shock of the worker in the wet condition of the pipe.

Normally, the synthetic resin main pipe embedded in the ground has its own expansion rate, while the pressure pipes such as gas pipes and water pipes have a constant thickness, inner diameter, and outer diameter due to their own characteristics, whereas the thickness, inner diameter, and outer diameter of the joint socket are dependent on the manufacturing environment. The lamps are manufactured with a large allowable tolerance for smooth pipe connection. Therefore, when there is a fitting tolerance between the main pipe diameter and the joint socket, or when there is a poor contact between the joint port and the synthetic resin pipe, synthetic resin pipes such as sewer pipes and drain pipes of which the outer diameter is not constant may cause shrinkage, such as sockets or couplings. There was a problem that often occurs when the main tube is separated from the joint.

Accordingly, the present invention has been proposed to solve the above problems, by installing the electrofusion bands on both main pipes through the joints such as sockets or couplings, and fastening the electrofusion bands with bolts from the joints. The purpose of the present invention is to reliably prevent the main tube from being separated, and to provide an electrically fusion-coupled connection device for preventing the separation of the joint pipe, which can maintain the joint.

In order to achieve the above object, the present invention, in the pipe fittings including industrial pipes, such as water, sewage pipes and gas pipes, the socket is mounted on the inner surface to connect the ends of both piping materials and maintain airtightness absence; First and second electrofusion ring bands fitted to outer surfaces of the two piping materials, and provided with heating wires on an inner circumferential surface of the piping material to enable electrical fusion; First and second flanges protruding from an outer circumferential surface of each of the first and second electrofusion ring bands, and having a screw hole penetrating through a central portion thereof; And a band connecting bolt mounted to cross from the through hole of the first flange to the through hole of the second flange to prevent the two pipes from being separated from the socket member. to provide.

In another embodiment of the present invention, a support protrusion piece having a screw hole in the center and spaced apart from the outer surface of the socket member, and first and second electrofusion ring bands respectively positioned at positions opposite to the support protrusion piece, respectively. The first and second flanges protrudingly mounted on an outer circumferential surface of the first flange, the first and second flanges having a screw hole penetrating through the central part thereof, and are mounted across the screw hole side of the support protrusion from the through hole of the first flange and the through hole of the second flange. Provided is an electro-fusion connection device for preventing the separation of the joint pipe consisting of a band connecting bolt for preventing the separation of both pipes from the socket member.

According to the features of the present invention as described above, by connecting the electric fusion band installed on both main pipes when the pipe joints through the socket with bolted joints, due to the shrinkage of the main pipe when the pipe diameter difference between the joint and the main pipe or poor contact There is an effect that can prevent the main tube from being separated from the socket fitting port.

In addition, the present invention, by introducing an electric fusion method to the mechanical joint by the socket, even if the shrinkage of the main tube, by maintaining the joint firmly by the bolt to enhance the reliability of the joint, and at the same time As it can be separated, there is another effect that can maintain the main pipe as needed without cutting.

1 and 2 is a schematic cross-sectional view for explaining a joint method according to the prior art.

Figure 3 is an exploded perspective view showing the configuration of a first embodiment of the electrofusion connection device for preventing the separation of the joint pipe according to the present invention.

4 is an assembled cross-sectional view of FIG.

Figure 5 is an external view showing the configuration of a second embodiment of the electrofusion connection device for preventing separation of the joint pipe according to the present invention.

Figure 6 is an assembled cross-sectional view showing the configuration of the third embodiment of the electrofusion connection device for preventing separation of the joint pipe according to the present invention.

* Explanation of symbols for the main parts of the drawings

2, 4: piping material 6: socket member

8: packing 10, 12: first and second electrolytic ring bands

14, 16: 1st and 2nd flange 18: Band connection bolt

20: support protrusion

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 3 and 4.

Electrofusion connection device for preventing the separation of the joint pipe according to the present invention by using a joint such as a socket or a coupling and an electrofusion ring band to ensure that the main tube is separated from the joint even when the main tube is contracted with a reliable pipe joint It is implemented to prevent and to maintain when necessary.

In the present invention, as shown in Figs. 3 and 4, in the joint of a synthetic resin piping material including industrial piping such as various water, sewage pipes, and gas pipes, the ends of both piping materials (2, 4) are connected and airtight. A socket member 6 on which an packing 8 is mounted on an inner surface thereof so as to maintain a; First and second electro-fusion ring bands fitted to the outer surfaces of the two piping materials 2 and 4 and provided with heating wires 10a and 12a on the inner circumferential surface of the piping materials 2 and 4 to be electrically fused. (10, 12); First and second flanges 14 and 16 protrudingly mounted on outer circumferential surfaces of the first and second electrofusion ring bands 10 and 12, respectively, and having screw holes 14a and 16a penetrated in a central portion thereof; It is mounted so as to cross from the through hole 14a of the first flange 14 toward the through hole 16a of the second flange 16 so as to prevent the two pipes 2 and 4 from being separated from the socket member 6. Band connection bolt 18 to be; And it is installed to protrude on the outer circumferential surface of the socket member 6, and includes a support protrusion 20 for supporting the band connection bolt (18).

In the embodiment of the present invention will be described with respect to the structure in which the band connecting bolt 18 is fastened across the first and second flanges 14, 16 installed on the first and second electrofusion ring bands 10, 12, respectively. However, it is not limited thereto. That is, as shown in FIG. 6, the support protrusion pieces 20 having the screw holes 20a are separately installed on the outer surface of the socket member 6, and the first and second flanges 14 and 16 are spaced apart from each other. And connecting the band connecting bolt 20 to the support protrusion 20, respectively.

The socket member 6 in the present invention includes a coupling, a pipe fitting such as a 45 ° and 90 ° elbow, a T-shaped pipe, and the like. In addition, the socket member may be used in any of the pipe fittings that can be watertight in addition to the screw-type socket used in the market.

In addition, since the first and second electrofusion ring bands 10 and 12 are attached to the main pipe, bolts can be fastened, so that a semi-circular ring band divided into half can be employed.

In the embodiment of the present invention, an example using a band connection bolt 18 for fixing the pipe joint is provided, but is not limited thereto. As shown in FIG. 6, a known clamping structure may be used. It is a well known fact.

That is, as shown in the figure, a clamp 32 having a locking ring 34 is mounted on an outer surface of the first electrofusion ring band 10, and the second electrofusion ring band 12 or the socket member ( It is possible to have a structure in which the latch 36 is mounted on the outer surface of 6).

On the contrary, two clamps 32 are provided on the outer surface of the socket member 6 at intervals, and the latch members 36 are mounted on the first and second electrofusion ring bands 10 and 12, respectively, to form a socket member ( It is also possible to fasten the catch ring 34 to the catch 36 of each of the 1st and 2nd electrofusion ring bands 10 and 12 from 6).

According to the above configuration, after the two pipes 2 and 4 are connected, the first and second electrofusion bands 10 and 12 are electrically welded to the pipes 2 and 4, and the clamp 32 After the 34 is attached to the clamp 36, the clamp 32 can be pulled to firmly fix both the pipe members 2 and 4 and the socket member 6 to each other.

 According to the present invention configured as described above, after the piping members 2 and 4 are fitted to both sides of the socket member 6 to maintain airtightness, the first and second electrofusion ring members ( 10 and 12) are installed and welded respectively. The band fixing bolt 18 passes through the through hole 14a of the first flange 14, the support protrusion 20, and the through hole 16a of the second flange 16. By doing so, the pipes 2 and 4 are firmly connected to each other. While the two side pipe members 2 and 4 and the first and second electrofusion ring members 10 and 12 are integrated, the two side pipe members 2 and 4 and the socket member 6 can be separated from each other. In particular, in the present invention, while the airtight by the socket member 6 is reliably maintained, the band fixing bolt 18 fixes both of the electrofusion ring members 10 and 12, so that the pipe member from the socket member 6 (2, 4) is prevented from being separated.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

Claims (6)

In the joint of the piping material including industrial piping, such as water, sewage pipe and gas pipe, A socket member having a packing mounted on an inner surface thereof to insert and connect ends of both pipe members, and to maintain airtightness; First and second electrofusion ring bands fitted to outer surfaces of the two piping materials, and provided with heating wires on an inner circumferential surface of the piping material to enable electrical fusion; First and second flanges protruding from an outer circumferential surface of each of the first and second electrofusion ring bands, and having a screw hole penetrating through a central portion thereof; And Band connecting bolts mounted to cross the through holes of the first flange from the through holes of the second flange to prevent the two pipes from being separated from the socket member Electrofusion connection device for preventing the separation of the joint pipe comprising a. In the joint of the piping material including industrial piping, such as water, sewage pipe and gas pipe, A socket member having a packing mounted on an inner surface thereof to insert and connect ends of both pipe members to maintain airtightness; A support protrusion provided at intervals on an outer surface of the socket member and having a screw hole at a central portion thereof; First and second electrofusion ring bands fitted to outer surfaces of the two piping materials, and provided with heating wires on an inner circumferential surface of the piping material to enable electrical fusion; First and second flanges protrudingly mounted on outer circumferential surfaces of each of the first and second electrofusion ring bands facing the support protrusion piece, and having a screw hole penetrating through a central portion thereof; And Band connecting bolts are mounted across the through hole of the first flange and the through hole of the second flange to the screw hole side of the support protrusion piece, respectively, to prevent the two pipes from being separated from the socket member. Electrofusion connection device for preventing the separation of the joint pipe comprising a. In the joint of the piping material including industrial piping, such as water, sewage pipe and gas pipe, A socket member having a packing mounted on an inner surface thereof to insert and connect ends of both pipe members, and to maintain airtightness; First and second electrofusion ring bands fitted to outer surfaces of the two piping materials, and provided with heating wires on an inner circumferential surface of the piping material to enable electrical fusion; And One side is installed on the outer circumferential surface of the first fusion ring band, the other side is mounted on the outer surface of the socket member or the second fusion ring band clamping means for preventing the separation of both pipes from the socket member Electrofusion connection device for preventing the separation of the joint pipe comprising a. The method of claim 1, It is installed to protrude on the outer circumferential surface of the socket member, the electric fusion-type connection device for preventing the separation of the joint pipe further comprises a support protrusion for supporting the band connecting bolt. The method according to any one of claims 1 to 4, The socket member is a coupling, 45 ° and 90 ° elbow, electro-fusion connection device for preventing the separation of the joint pipe, characterized in that consisting of one selected from the T-shaped tube. The method of claim 3, wherein The clamping means  A clamp having a catch ring is mounted on an outer surface of the first fusion band, and a brace is mounted on an outer surface of a selected one of the second fusion band or the socket member so that the catch ring is fixed to the catch by the operation of the clamp. Electrofusion type connection device for preventing the separation of the joint pipe.