KR101655315B1 - Polyurethane forming Cap of heat shrinkable casing for double insulation pipe - Google Patents

Polyurethane forming Cap of heat shrinkable casing for double insulation pipe Download PDF

Info

Publication number
KR101655315B1
KR101655315B1 KR1020160002700A KR20160002700A KR101655315B1 KR 101655315 B1 KR101655315 B1 KR 101655315B1 KR 1020160002700 A KR1020160002700 A KR 1020160002700A KR 20160002700 A KR20160002700 A KR 20160002700A KR 101655315 B1 KR101655315 B1 KR 101655315B1
Authority
KR
South Korea
Prior art keywords
tube
hole
heat
foam
groove
Prior art date
Application number
KR1020160002700A
Other languages
Korean (ko)
Inventor
김태진
양선화
Original Assignee
신이피엔씨 주식회사
조인스틸 주식회사
양선화
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 신이피엔씨 주식회사, 조인스틸 주식회사, 양선화 filed Critical 신이피엔씨 주식회사
Priority to KR1020160002700A priority Critical patent/KR101655315B1/en
Application granted granted Critical
Publication of KR101655315B1 publication Critical patent/KR101655315B1/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • F16L47/03—Welded joints with an electrical resistance incorporated in the joint
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
    • F16L59/18—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for joints

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Insulation (AREA)

Abstract

The present invention relates to a heat shrinkable tubular urethane foam foam plug for a double insulated tube and a method for installing the foam plug. More specifically, the inner tubes of two double insulated tubes are welded, the heat shrink tubes are placed at the joints, heat is applied to both ends of the heat shrink tubes, the ends of the heat shrink tubes are brought into close contact with the double insulated tubes, A groove plug for injecting and curing a polyurethane foam and closing the forming hole, the insertion tube being inserted into the forming hole and having a cut along the longitudinal direction; A plate-shaped stopper comprising a hollow hole connected to an upper end of the insertion tube, an electric welder mounting hole, and a pe having a work presence / absence hole; And a hollow tube portion formed on the lower end of the lower end portion and protruding upwardly from the lower end of the lower end portion to be inserted into the fusion bonding hole and a hollow tube portion coupled to the inner surface of the hollow hole, The present invention relates to a heat shrinkable tubular urethane foam foam groove for a double insulated tube.

Description

TECHNICAL FIELD [0001] The present invention relates to a heat shrinkable tube for a double insulated tube, a method for manufacturing the same, a method for manufacturing the same,

The present invention relates to a heat shrinkable tubular urethane foam foam plug for a double insulated tube and a method for installing the foam plug. More specifically, a double heat insulating pipe joint is heat-shrunk at both ends using a heat shrinking tube, and then a foaming hole is drilled in order to fill the polyurethane foam at one side of the heat shrinking tube, inserting the polyurethane foam thereinto, A heat insulating shrinkable tube for a double insulated tube, and a method of installing the foamed trough.

Generally, heat generated from cogeneration plants and waste incinerators is supplied to large areas such as apartment complexes and commercial buildings through district heating systems. Generally, the heat supply is achieved by heating the water and then supplying the heated hot water to a building requiring heating and hot water through a heat transfer pipe. Since such a district heating system must supply hot water (heat) a long distance from a heat source, hot water should be supplied while minimizing heat loss when hot water is supplied. A double insulated pipe is used as a heat transfer pipe used for supplying hot water.

The double insulated pipe includes an inner pipe 1 as a steel pipe through which hot water flows and an outer pipe 3 which can be composed of a high density polyethylene (HDPE) material surrounding the outer circumferential surface of the inner pipe 1 And a heat insulating layer 2 made of a heat insulating material and a heat insulating material filled between the inner tube 1 and the outer tube 3. [ Polyurethane is mainly used as a heat insulating material. The piping lines constituting the district heating system are formed by connecting a plurality of double insulation pipes to each other. On the other hand, the outer tube (3) and the insulating layer are also referred to as a double insulating tube (8).

1A is a perspective view of a conventional double insulated tube 8 in which an inner tube 1 is exposed and a heat shrinking tube 5 is inserted into an outer tube 2 of one of the double insulated tubes, And shows a perspective view in a welded state.

1B is a perspective view of the heat-shrinkable tube in a state where the heat-shrinkable tube is moved to the connection portion of two double insulated tubes. FIG. 1C is a cross-sectional view illustrating a state in which heat is applied by moving the heat-shrinkable tube to the connection side of two double insulated tubes. FIG. 1D is a cross-sectional view of a state in which urethane is filled into a foaming hole of a heat-shrinkable tube.

As shown in the figure, the connection of the double insulated pipe 8 is made by a cylindrical heat shrinking tube 5 surrounding the outer tube 3 of the two double insulated tubes 8 and an inner tube 1 And a filling insulating layer 2 for insulating the insulating layer 2 and the like.

The process of connecting two double insulated pipes is as follows. First, the heat-shrinkable tube 5 is inserted into one of the two double-side tubes 8, one end of which is exposed to the outside, and the two double- The two inner tubes 1 are connected to each other by welding in a state in which the end surfaces of the inner tube 1 of the inner tube 1 are in contact with each other. Then, a double-sided heat-sealing tape is attached to the ends of each outer tube 3 of the two double insulated tubes 8 in the form of a circular strip, and then the inner tube 1 exposed to the outside is covered with the heat-shrinkable tube 5.

Both ends of the heat-shrinkable tube 5 are respectively heated by a heating means 7 such as a torch lamp to shrink both ends of the heat-shrinkable tube 5 to be brought into close contact with the outer tube 3. At this time, (3) is melted and sealed between the heat-shrinkable tube (5) and the outer tube (3).

A forming hole 6 is formed in the heat-shrinkable tube 5 and the polyurethane foam solution is injected into the forming hole 6 formed in the heat-shrinkable tube 5, and the gas is discharged for 30 to 60 seconds The foaming hole 6 was closed with the palm for about 10 seconds so that the hole of the hardening hole of the polyurethane foam was clogged and the foaming was continued in the inside. After 24 hours, the periphery of the foaming hole 6 was cleaned and the foaming hole 6 ) With Webs. After that, the webs are fixed with a saddle, and then the webs are electrically fused.

However, when the polyurethane foam solution is injected into the foaming hole 6 to foam the foaming hole 6 due to the hot foaming polyurethane foam, when the foaming hole 6 is closed early, The polyurethane foam leaks into the hole 6 and the density of the foamed polyurethane foam at the site joint becomes lower than 60 kg / m 3 or the gas in the foamed polyurethane foam can not be discharged to the outside through the foaming hole 6, The quality of the foam was poor.

The defective quality of the polyurethane foam leads to a failure in the connection of the double insulated pipe, which inevitably necessitates repairs.

Further, since the foaming hole 6 is blocked by the operator's hand, the filling state of the polyurethane foam can not be visually checked, and the density of the polyurethane foam can not be properly maintained.

In the conventional double insulated tube described above, a forming hole is melted by applying heat to the surface, and a method of instantly bonding the sheet and a method of bonding the sheet having the characteristics of a semiconductive sheet to the surface are used.

These methods are adopted only for a large diameter pipe because the thickness of the heat-shrinkable tube or the polyethylene pipe is so small that it is difficult to adhere to it. Since the method of bonding the surface of a sheet having semiconductor characteristics is difficult in terms of ambient temperature, construction, A wedge-shaped plug and a heat applying method to attach the sheet.

Published Patent No. 10-2008-0100697 Registration No. 10-0912857

Accordingly, the present invention has been made in order to solve various drawbacks and problems caused by the above-mentioned heat insulation treatment method in the double insulated pipe connection region. According to one embodiment of the present invention, And an object of the present invention is to provide a heat shrinkable tubular urethane foam foam stopper for a double heat insulation pipe which is formed by completely sealing the foamed hole with a finishing quality by using a groove stopper for the urethane foam injection port.

According to an embodiment of the present invention, a heat-shrinkable tube and a cap are thermally fused to each other by using a foaming groove stopper manufactured by injecting insert pe to attach a pe-melting wire member manufactured in the form of a netting The present invention provides a heat-shrinkable tubular urethane foam foam stopper for a double heat insulation pipe, which enables the finish of the foaming hole to be watertight and to confirm the degree of fusion through a work presence confirmation hole in a fusion process.

Further, according to the embodiment of the present invention, the gas in the foamed polyurethane foam can be easily discharged during the heat insulation at the connection portion of the double insulation pipe, and the density of the polyurethane foam becomes 60 kg / m 3 or more, The present invention is directed to a heat shrinkable tubular urethane foam foam stopper for a double insulated tube.

According to one embodiment of the present invention, since the foam quality of the polyurethane foam is improved during the insulation of the connection part of the double insulation pipe, it is possible to minimize the occurrence of defects in the insulation at the connection area of the double insulation pipe, The present invention provides a heat shrinkable tubular urethane foam foam stopper for a double heat insulation pipe which enables insulation construction at a connection portion of a heat insulation pipe.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

delete

After welding the inner tube of the two double insulated tubes and placing the heat shrink tube at the connection site, heat is applied to both ends of the heat shrink tube and the end of the heat shrink tube is brought into close contact with the double insulated tube. Then, polyurethane foam is injected into the foaming hole of the heat shrink tube A groove cap for closing the forming hole after curing, the insertion tube being inserted into the forming hole and having a cut along the longitudinal direction; A plate-shaped stopper formed of a peel having a hollow hole formed at the center, an electric welder mounting hole, and a work presence confirmation hole; And a hollow tube portion that is coupled between the upper end surface of the insertion tube and the inner surface of the hollow hole, and a lower end portion coupled to a lower end surface of the stopper portion, a protruding end protruding upwardly from the lower end portion to be inserted into the fusion- And a fusing wire member in the form of a net to which the fusing wire member is attached.
In addition, when the groove plug is installed in the forming hole, the insertion tube is inserted into the forming hole, a pin is inserted into the hollow hole of the groove plug to fix the groove plug to the forming hole, And the heat is generated by applying electricity to the fusing wire member by an electric fusing device so that the fusing part and the heat shrinking tube are fused and fixed to each other. .

The insertion tube may have the same outer diameter, and the thickness of the insertion tube may be gradually increased toward the lower inner side with respect to the incised portion.

A second object of the present invention is to provide a method for manufacturing a heat shrinkable tube by welding inner tubes of two double insulated tubes and placing the heat shrink tube at a connection site and applying heat to both ends of the heat shrink tube, And forming a lower end portion having a hollow tube portion at the center thereof, and forming a lower end portion of the upper end portion of the lower end portion of the polyurethane foam, Joining the projecting ends to produce a fusing wire member; And an insertion tube having a hollow hole, an electric welder mounting hole, and a work presence / absence hole and a cut-out portion formed along the longitudinal direction, and the upper end portion of the lower end portion is contacted with the lower end surface of the plug portion And engaging the wire member with the plug and the fusing wire member such that the protruding end is inserted into the electric fuser mounting hole and the hollow tube portion is positioned between the insertion tube and the hollow hole The present invention can be achieved as a method for manufacturing a heat shrinkable tubular urethane foam foam groove for a double insulated tube.

A third object of the present invention is to weld the inner tubes of two double insulated tubes and place the heat-shrinkable tube at the connection site, heat is applied to both ends of the heat-shrinkable tube and the end of the heat- Wherein the polyurethane foam is injected into the foaming hole of the heat-shrinkable tube, and then the polyurethane foam is injected into the groove plug according to claim 1, Inserting an insertion tube of the first insertion hole into the foaming hole; Inserting a pin into the hollow hole of the groove plug to fix the groove plug to the forming hole; Connecting a wire of an electric welder to a protruding end inserted in the electric welder mounting hole, and then applying electricity to the welding wire member by the electric welder to generate heat; And the heat-shrinkable tube is fused and fixed to the cap of the groove plug by the heat generated from the fusing wire member, wherein the insertion tube has the same outer diameter, and the lower inner side Wherein the thickness of the foaming hole is gradually increased by increasing the thickness of the foaming hole. In the step of fixing the foaming hole to the foaming hole, the outer diameter of the insertion tube is enlarged by the insertion of the fin, It can be achieved as a method of installing a foam groove cap.

According to one embodiment of the present invention, in the case of inserting a foamed polyurethane foam injection hole in a double insulation pipe connection region, the quality of the foaming can be improved by using a groove stopper, and then the finish of the foaming hole can be completely heat- .

According to an embodiment of the present invention, a heat-shrinkable tube and a cap are thermally fused to each other by using a foaming groove stopper manufactured by injecting insert pe to attach a pe-melting wire member manufactured in the form of a netting The finish of the forming hole can be made watertight, and the degree of fusing can be confirmed through the work presence / absence hole in the fusing process.

Further, according to the embodiment of the present invention, the gas in the foamed polyurethane foam can be easily discharged during the heat insulation at the connection portion of the double insulation pipe, and the density of the polyurethane foam becomes 60 kg / m 3 or more, Can be improved.

According to one embodiment of the present invention, since the foam quality of the polyurethane foam is improved during the insulation of the connection part of the double insulation pipe, it is possible to minimize the occurrence of defects in the insulation at the connection area of the double insulation pipe, And has the advantage of enabling the insulation installation at the insulation pipe connection site.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be construed as limited.
FIG. 1A is a perspective view showing a state in which an inner tube is exposed, a heat-shrinkable tube is inserted into the outer surface of one of the double heat-insulating tubes and inner tubes are welded to each other,
1B is a perspective view of the heat-shrinkable tube in a state where the heat-shrinkable tube is moved to the connection portion of two double insulated tubes,
1C is a perspective view showing a state in which heat is applied by moving the heat-shrinkable tube to the connection side of two double insulated tubes,
1D is a perspective view showing a state in which urethane is filled into the inside through a forming hole of a heat shrinkable tube,
2 is a perspective view of a heat shrinkable tubular urethane foam foam groove for a double insulated tube according to an embodiment of the present invention,
3 is a perspective view of a fusing wire member according to an embodiment of the present invention,
4 is a flow chart of a method of manufacturing a urethane foam foam groove for a double heat insulation pipe according to an embodiment of the present invention,
FIG. 5 is a flow chart of a method for installing a urethane foam foam groove for a double heat insulation pipe according to an embodiment of the present invention,
FIG. 6A is a cross-sectional view of a double-heat insulating pipe heat-shrinkable tubular urethane foam foam plug inserted into a foaming hole of a heat shrinkable tube according to an embodiment of the present invention;
FIG. 6B is a cross-sectional view illustrating a state where a pin is inserted into a hollow hole of a groove stopper according to an embodiment of the present invention;
FIG. 6C is a cross-sectional view of a state where a fusing wire member is fused by connecting an electric fuser according to an embodiment of the present invention;
7 is a cross-sectional view of a double insulated tube with a groove plug according to an embodiment of the present invention mounted thereon.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more readily apparent from the following description of preferred embodiments with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Also in the figures, the thickness of the components is exaggerated for an effective description of the technical content.

Embodiments described herein will be described with reference to cross-sectional views and / or plan views that are ideal illustrations of the present invention. In the drawings, the thicknesses of the films and regions are exaggerated for an effective description of the technical content. Thus, the shape of the illustrations may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in the shapes that are produced according to the manufacturing process. For example, the area shown at right angles may be rounded or may have a shape with a certain curvature. Thus, the regions illustrated in the figures have attributes, and the shapes of the regions illustrated in the figures are intended to illustrate specific forms of regions of the elements and are not intended to limit the scope of the invention. Although the terms first, second, etc. have been used in various embodiments of the present disclosure to describe various components, these components should not be limited by these terms. These terms have only been used to distinguish one component from another. The embodiments described and exemplified herein also include their complementary embodiments.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms "comprises" and / or "comprising" used in the specification do not exclude the presence or addition of one or more other elements.

In describing the specific embodiments below, various specific details have been set forth in order to explain the invention in greater detail and to assist in understanding it. However, it will be appreciated by those skilled in the art that the present invention may be understood by those skilled in the art without departing from such specific details. In some instances, it should be noted that portions of the invention that are not commonly known in the description of the invention and are not significantly related to the invention do not describe confusing reasons to explain the present invention.

Hereinafter, the structure and function of the heat shrinkable tubular urethane foam foam plug 100 for a double insulated tube according to an embodiment of the present invention will be described. 2 is a perspective view of a heat shrinkable tubular urethane foam foam plug 100 for a double insulated tube according to an embodiment of the present invention. 3 shows a perspective view of a fusing wire member 10 according to an embodiment of the present invention.

The heat insulating shrinkable tube for a double insulated tube according to an embodiment of the present invention is characterized in that the inner tube 1 of the double insulated tube 8 is welded and the heat shrinkable tube 5 is placed at the connecting site Heat is applied to both ends of the heat shrinking tube 5 to bring the end of the heat shrinking tube 5 into close contact with the double heat insulating tube 8 and then the polyurethane foam is injected into the foaming hole 6 of the heat shrinking tube 5, And then to close the foaming hole 6.

2, the insertion tube 20, the stopper portion 30, and the fusing wire member 10, as shown in Fig. 2, are provided in the heat- shrinkable tubular urethane foam foam plug 100 for a double- And the like.

The insertion tube 20 according to the embodiment of the present invention is inserted into the forming hole 6 of the heat shrinking tube 5 at the time of installation and is inserted into the foaming hole 6 of the heat shrinking tube 5, It can be seen that the incised portion 21 is formed.

As described later, the outer diameter of the insertion tube 20 according to the embodiment of the present invention is the same along the longitudinal direction, but the inner diameter is gradually decreased to the lower end side. That is, the thickness is gradually increased toward the lower end with respect to the cut-out portion 21. With such a configuration, the groove 100 can be fixed to the forming hole 6 of the heat-shrinkable tube 5 by inserting the pin 101 into the insertion tube 20, .

2, the stopper portion 30 according to the embodiment of the present invention is formed in a disc shape as a whole, has a hollow hole 31 at the center thereof, and has a plurality of electric fuser attachment holes 33 And a plurality of work presence / absence checking holes 32. [ Also, the stopper portion 30 is made of pe.

2 and 3, the fusing wire member 10 according to an embodiment of the present invention includes a lower end portion 12, two projecting ends 11 and a hollow tube portion 13 at the center As shown in FIG.

Further, the fusing wire member 10 is manufactured in the form of a net wire. 3, the lower end portion 12 is provided at the lower end of the stopper portion 30. The protruding end portion 11 is protruded upward from one side of the lower end portion 12, And is inserted into the mounting hole 33. Further, the hollow tube portion 13 is coupled to the inner surface of the hollow hole 31 of the stopper portion 30.

Therefore, as described later, the groove plug 100 according to the embodiment of the present invention is installed in the forming hole 6 of the heat shrinking tube 5, and then the protrusion inserted into the electric fuser mounting hole 33 The fusing wire member 10 is heated by connecting the end 11 and the electric wire 41 of the electric fusing unit 40 so that the fusing unit 30 and the heat shrinking tube 5 are melted and fusion- .

The worker can confirm the fusing degree through the work presence / absence hole 32 formed in the stopper portion 30 while the stopper portion 30 composed of pe and the heat shrinking tube 5 are fused. As described above, the work presence / absence check hole 32 is formed on one side of the stopper 30 and the stopper 30 and the heat-shrinkable tube 5 are connected to each other as the fusing wire member 10 generates heat, The molten pe flows into the work presence / absence hole 32, and the height of the introduced pe is confirmed, and the degree of fusion can be confirmed.

Hereinafter, a method of manufacturing a heat shrinkable tubular urethane foam foam groove for a double insulated tube according to an embodiment of the present invention will be described. 4 is a flowchart illustrating a method of manufacturing a heat shrinkable tubular urethane foam foam groove for a double insulated tube according to an embodiment of the present invention.

First, a fusing wire member 10 in the form of a net is manufactured using a copper wire (S1). As shown in FIG. 3, it can be seen that the fusing wire member 10 has a mesh shape as a whole. First, a lower end portion 12 having a central hole in the form of a net is formed by using a copper wire, and a hollow tube portion 13 in the form of a net is formed by inserting an insertion member into the center hole. The welding wire member 10 is manufactured by welding two protruding ends.

Then, after the fusing wire member 10 is manufactured, the insertion tube and the plug portion are pe-molded, and then the fusing wire member 10 is joined. Alternatively, after inserting the fusing wire member 10 into the metal mold, an insert is injected to mold the insert tube and the plug to form a groove plug. That is, the heat-shrinkable tubular urethane foam foam plug 100 for a dual thermostat pipe is manufactured (S2) so that the fusing wire member 10 is attached by pe insert injection molding.

That is, the fusing wire member 10 is mounted, and a hollow hole 31, an electric fuser attachment hole 33, and a work presence / absence hole 32 are formed on the lower end portion 12 of the fusing wire member 10 And the insertion tube 20 inserted into the forming hole 6 and formed along the longitudinal direction is provided at the lower end of the hollow tube portion 13, The groove plug 100 is manufactured by pe injection molding.

Hereinafter, a method of installing a urethane foam foam groove for a double heat insulation pipe according to an embodiment of the present invention will be described. 5 is a flowchart illustrating a method of installing a urethane foam foam groove for a double heat insulation pipe according to an embodiment of the present invention.

6A is a cross-sectional view of a double-heat insulating pipe heat-shrinkable tubular urethane foam foam plug 100 inserted into a forming hole 6 of a heat-shrinkable tube 5 according to an embodiment of the present invention. 6B is a cross-sectional view of a state where the fin 101 is inserted into the hollow hole 31 of the groove stopper 100 according to an embodiment of the present invention. 6C is a cross-sectional view of a state in which the fusing wire member 10 is fused by connecting the electric fusing device 40 according to an embodiment of the present invention. 7 is a sectional view of the double insulated tube 8 in a state where the groove stopper 100 according to the embodiment of the present invention is mounted.

As described above, the heat-shrinkable tube 5 is inserted into the double insulated tube 8 of one of the two double insulated tubes 8 whose end portion of the inner tube 1 is exposed to the outside, The two inner tubes 1 are connected to each other by welding while the end surfaces of the inner tube 1 of the tube 8 are in contact with each other. Then, the heat-shrinkable tube 5 is moved to the connection side of the two double insulated tubes 8.

Both ends of the heat-shrinkable tube 5 are respectively heated by a heating means 7 such as a torch lamp to shrink both ends of the heat-shrinkable tube 5 so as to be brought into close contact with the outer tube 3. The heat shrinkable tube 5 and the outer tube 3 ). Then, a forming hole 6 is formed in the heat-shrinkable tube 5, and the polyurethane foam solution is injected into the forming hole 6 formed in the heat-shrinkable tube 5 and cured.

After the polyurethane foam is injected into the forming hole 6 of the heat-shrinkable tube 5, the insertion tube 20 of the groove plug 100 according to the embodiment of the present invention shown in FIG. And inserted into the forming hole 6 (S10).

6 (b), the fin 101 is inserted into the hollow hole 31 of the groove plug 100 to fix the groove plug 100 to the forming hole 6 (S20). As described above, since the insertion tube 20 has the same outer diameter and is configured to gradually increase in thickness to the lower inner side with respect to the incising portion 21, in the step of fixing to the forming hole 6 , The insertion of the pin 101 causes the outer diameter of the insertion tube 20 to be enlarged and fixed to the forming hole 6 as shown in Fig. 6B.

6C, after the electric wire 41 of the electric welder 40 is connected to each of the projecting ends 11 inserted into the electric welder mounting hole 33, the electric arc welder 40 The heat generated in the fusing wire member 10 causes the plug 30 of the groove plug 100 and the heat shrinking tube 5 to be heated by the heat generated by applying the electricity to the fusing wire member 10. [ They are fusion-bonded to each other.

At this time, the operator can confirm the degree of fusion through the work presence / absence hole 32 formed in the stopper portion 30, while the stopper portion 30 composed of pe and the heat shrinkable tube 5 are fusion-bonded. As described above, the work presence / absence check hole 32 is formed on one side of the stopper 30 and the stopper 30 and the heat-shrinkable tube 5 are connected to each other as the fusing wire member 10 generates heat, The molten pe flows into the work presence / absence hole 32, and the height of the introduced pe is confirmed, and the degree of fusion can be confirmed.

It should be noted that the above-described apparatus and method are not limited to the configurations and methods of the embodiments described above, but the embodiments may be modified so that all or some of the embodiments are selectively combined .

1: Inner pipe
2: insulating layer
3: Appearance
5: Heat shrinkable tube
6: Forming hole
7: Heating means
8: Double insulated tube
10: fusing wire member
11: protruding end
12: Lower end
13: hollow tube portion
20: Insertion tube
21: incision
30:
31: hollow hole
32: Operation check hole
33: Electric fusion splicer mounting hole
40: electric fusion machine
41: Wires
42:
100: Heat-shrinkable tube for double insulated pipe Urethane foam foaming groove plug
101: pin
A: Fused portion

Claims (5)

After welding the inner tube of the two double insulated tubes and placing the heat shrink tube at the connection site, heat is applied to both ends of the heat shrink tube and the end of the heat shrink tube is brought into close contact with the double insulated tube. Then, polyurethane foam is injected into the foaming hole of the heat shrink tube And a groove for closing the forming hole after curing,
An insertion tube inserted into the forming hole and having a cut along the longitudinal direction;
A plate-shaped stopper formed of a peel having a hollow hole formed at the center, an electric welder mounting hole, and a work presence confirmation hole; And
A protruding end protruding upwardly from one side of the lower end and inserted into the fuser mounting hole and a hollow tube portion coupled between an upper end outer surface of the insertion tube and an inner surface of the hollow hole, A fusing wire member in the form of a net,
Wherein the insertion tube has the same outer diameter and is configured such that the thickness gradually increases toward the lower end inside from the incision portion,
When the groove is provided in the forming hole,
The insertion tube is inserted into the foaming hole, the pin is inserted into the hollow hole of the groove plug to fix the groove plug to the foaming hole,
A protruding end inserted into the electric fuser mounting hole is connected to a wire of an electric welder, electricity is applied to the fusing wire member by an electric welder to generate heat, and the stopper and the heat shrink tube are fused and fixed to each other A heat-shrinkable tube for a double insulated tube.
delete delete A method for manufacturing a heat shrinkable tubular urethane foam foam groove for a double insulated tube according to claim 1,
Fabricating a copper wire in the form of a net, fabricating a lower end portion having a hollow tube portion at the center thereof, and joining the projecting end portion of the lower end portion to produce a fusing wire member; And
A plate-shaped plug portion having a hollow hole, an electric welder mounting hole, and a work presence / absence hole; and an insertion tube having a cut portion formed along the longitudinal direction thereof. The upper end of the lower end portion is in contact with the lower end surface of the plug portion And joining the wire member and the stopper portion to the fusing wire member such that the projecting end is inserted into the electric fuser attachment hole and the hollow tube portion is positioned between the insertion tube and the hollow hole (EN) The present invention relates to a method of manufacturing a heat - shrinkable tubular urethane foam foam stopper for a double insulated tube.
After welding the inner tube of the two double insulated tubes and placing the heat shrink tube at the connection site, heat is applied to both ends of the heat shrink tube and the end of the heat shrink tube is brought into close contact with the double insulated tube. Then, polyurethane foam is injected into the foaming hole of the heat shrink tube A method for installing a groove stopper for closing the foaming hole after curing,
Inserting a polyurethane foam into a foaming hole of a heat-shrinkable tube, and inserting an insertion tube of a groove plug according to claim 1 into the foaming hole;
Inserting a pin into the hollow hole of the groove plug to fix the groove plug to the forming hole;
Connecting a wire of an electric welder to a protruding end inserted in the electric welder mounting hole, and then applying electricity to the welding wire member by the electric welder to generate heat; And
And fusing and fixing the cap of the groove plug and the heat shrinkable tube by heat generated from the fusing wire member,
Wherein the insertion tube has an outer diameter equal to the outer diameter of the insertion tube and gradually increases in thickness toward the lower end of the insertion tube with respect to the incising section so that the insertion of the pin enlarges the outer diameter of the insertion tube, Wherein the heat-shrinkable tube is fixed to the foaming hole.
KR1020160002700A 2016-01-08 2016-01-08 Polyurethane forming Cap of heat shrinkable casing for double insulation pipe KR101655315B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160002700A KR101655315B1 (en) 2016-01-08 2016-01-08 Polyurethane forming Cap of heat shrinkable casing for double insulation pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160002700A KR101655315B1 (en) 2016-01-08 2016-01-08 Polyurethane forming Cap of heat shrinkable casing for double insulation pipe

Publications (1)

Publication Number Publication Date
KR101655315B1 true KR101655315B1 (en) 2016-09-08

Family

ID=56950527

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160002700A KR101655315B1 (en) 2016-01-08 2016-01-08 Polyurethane forming Cap of heat shrinkable casing for double insulation pipe

Country Status (1)

Country Link
KR (1) KR101655315B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101737346B1 (en) * 2016-10-17 2017-05-29 신이피엔씨 주식회사 Casing for connecting double insulation pipe, method for manufacturing the casing, and method for connecting double insulation pipe using the casing
CN111347682A (en) * 2020-03-18 2020-06-30 高友华 Electric fusion welding method for PE pipe
KR20220047235A (en) * 2020-09-28 2022-04-15 명문기업 주식회사 End plug for double insulation pipe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10213286A (en) * 1997-01-30 1998-08-11 Tokyo Gas Co Ltd Mechanical plug for work of boring gas piping and work method for gas piping for fixing welded cup by using the plug
KR200164789Y1 (en) * 1999-04-03 2000-02-15 백성곤 A sunshine cover for the car
KR20080100697A (en) 2007-05-14 2008-11-19 김진만 A plug using at connector of double insulation pipe
KR100912857B1 (en) 2008-02-26 2009-08-18 김진만 A welding plug of thermal contraction forming hole in double insulation pipe
KR20110075645A (en) * 2009-12-28 2011-07-06 주식회사 한국피이엠 Support unit for connecting pre-insulated pipe, pre-insulated pipe assembly having the same and connection method for pre-insulated pipe using it

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10213286A (en) * 1997-01-30 1998-08-11 Tokyo Gas Co Ltd Mechanical plug for work of boring gas piping and work method for gas piping for fixing welded cup by using the plug
KR200164789Y1 (en) * 1999-04-03 2000-02-15 백성곤 A sunshine cover for the car
KR20080100697A (en) 2007-05-14 2008-11-19 김진만 A plug using at connector of double insulation pipe
KR100912857B1 (en) 2008-02-26 2009-08-18 김진만 A welding plug of thermal contraction forming hole in double insulation pipe
KR20110075645A (en) * 2009-12-28 2011-07-06 주식회사 한국피이엠 Support unit for connecting pre-insulated pipe, pre-insulated pipe assembly having the same and connection method for pre-insulated pipe using it

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101737346B1 (en) * 2016-10-17 2017-05-29 신이피엔씨 주식회사 Casing for connecting double insulation pipe, method for manufacturing the casing, and method for connecting double insulation pipe using the casing
CN111347682A (en) * 2020-03-18 2020-06-30 高友华 Electric fusion welding method for PE pipe
KR20220047235A (en) * 2020-09-28 2022-04-15 명문기업 주식회사 End plug for double insulation pipe
KR102520246B1 (en) * 2020-09-28 2023-04-11 명문기업 주식회사 End plug for double insulation pipe

Similar Documents

Publication Publication Date Title
US11168827B2 (en) Method of and system for coating a field joint of a pipe
US6131954A (en) Weldable couple for electrofusion coupling of profile wall thermoplastic pipes without a separate coupler
JPS5913189A (en) Method and device for joining heat-insulating pipe
US9080702B2 (en) Method for the highly-thick thermal coating of joints by using electrofusion in pipes used for conducting fluids, made of steel tubes externally coated with polyolefins
KR101655315B1 (en) Polyurethane forming Cap of heat shrinkable casing for double insulation pipe
KR101737346B1 (en) Casing for connecting double insulation pipe, method for manufacturing the casing, and method for connecting double insulation pipe using the casing
US20010048223A1 (en) Method of and joint for coupling thermoplastic pipes
JP2016525956A (en) Piping system installation and repair methods and equipment
KR101878233B1 (en) Thermal shrinkage Casing having internal heating member, Thermal shrinkage Seat having internal heating member and method for manufacturing thereof
KR101635426B1 (en) Casing for connecting double insulation pipe, method for manufacturing the casing, and method for connecting double insulation pipe using the casing
KR101935027B1 (en) Welding plug for double insulation pipe and installation method thereof
KR102404567B1 (en) Heat shrink casing for double heat insulation tube, method for manufacturing heat shrink casing for double heat insulation tube and method for constructing heat shrink casing for double heat insulation tube
KR101123247B1 (en) Covering unit used in connecting pre-insulated pipe and connection method for pre-insulated pipe using it
EP2580511B1 (en) Shrink sleeve for joining insulated pipes
EP2926978B1 (en) Intermediate welding device
KR20220071596A (en) Manufacturing method and connecting method of thermosetting casing with minimal heat loss
FI77178B (en) FOERFARANDE FOER BILDANDE AV TAETADE ROERLAENGDER, SPECIELLT FJAERRVAERMEROERLAENGDER AV PLASTROER GENOM SAMMANFOGNING AV ROERELEMENT.
KR200417002Y1 (en) Device for connecting underground pipes
KR101370621B1 (en) Method for constructing repair of double ins ulation pipe
KR102539850B1 (en) Joint Method of Double Insulation Tube for Heat Transport
KR101044931B1 (en) A method for connecting thermal shrinlcable for sealing
AU2017270665B2 (en) Method for connecting two individual fluid transport pipe elements using rigid shells
JP5876777B2 (en) Manufacturing method of tube with insulation layer
KR101341053B1 (en) Pipe connection apparatus and method thereof
JPH11248080A (en) Connecting method for thermoplastic resin pipe

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20190902

Year of fee payment: 4