KR101887912B1 - Method for manufacturing the casing for double insulation pipe and establishment casing for double insulation pipe use of improved airtightness and keep warm - Google Patents

Abstract

The present invention relates to a method of manufacturing a double insulation pipe casing for airtightness improvement and thermal insulation. The double insulation pipe casing is stacked on an outer portion of a double insulation pipe for supplying heat generated from a combined heat and power plant, a garbage incineration plant and the like to a large area region including an apartment complex or commercial buildings through a district heating system; and the double insulation pipe casing manufactured by the method. More specifically, the double insulation pipe casing includes a composite polyethylene cross-linked sheet and a heat shrinkable sheet which is formed on a bottom portion of the composite polyethylene cross-linked sheet, and formed of a polyethylene resin or a polypropylene resin having the same density. The method of manufacturing the double insulation pipe casing for airtightness improvement and thermal insulation, comprises preparing a plurality of double insulation pipe casings as the double insulation pipe casing and stacking a steel plate, an aluminum plate or an incombustible material that is not melted by heat on boundary surfaces of the plurality of double insulation pipe casings.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a double heat insulation pipe casing for improving airtightness and insulation, and a double insulation pipe casing using the same,

The present invention relates to a heat insulating material for heat generated in a cogeneration power plant or a garbage incineration plant through a district heating system to supply heat to a large area including an apartment complex or a commercial building, A method of manufacturing a double insulated tube casing for improving airtightness and keeping warm, and a double insulated tube casing using the same.

More specifically, the present invention relates to a composite polyethylene cross-linked sheet in which low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE), high-density polyethylene (HDPE)

And a heat shrinkable sheet made of a polyethylene (PE) resin or a polypropylene (PP) resin provided at a lower portion of the composite polyethylene crosslinked sheet, and a double insulation tube casing using the same;

In particular, compared with the conventional method of manufacturing a double heat insulation tube casing by radiation crosslinking and a double heat insulation tube casing using the same, durability, impact resistance, bonding strength, heat insulation and airtightness performance are enhanced and manufacturing is easy;

Wherein the composite polyethylene crosslinked sheet constituting the double heat insulating casing is in the range of 20 to 40% Sheet And is pulled outward in the lateral direction to be extended in its length. The polyethylene tube, which is the outer appearance of the double insulated pipe, is contracted and tightly adhered to the outside during construction, The construction is easy, the bonding force, the heat insulating property and the air tightness performance are further strengthened;

In addition, a structure in which an iron plate, an aluminum plate, or a nonflammable material that is not heat-resistant is laminated on the interface between a plurality of double insulated tube casings and a plurality of double insulated tube casings, further enhances durability and impact resistance performance,

At the time of contamination of the outermost layer, the outermost layer is removed and the layer A double thermostat casing can be used, the pollution resistance performance is enhanced, the workability is further improved and the installation cost is reduced; The present invention relates to a method of manufacturing a double insulated tube casing for improving airtightness and keeping warm and a double insulated tube casing using the same.

Generally, heat generated from cogeneration plants and waste incinerators is supplied to large areas including 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 is composed of an inner pipe which is a steel pipe through which hot water (heat) flows, an outer pipe which is composed of a high density polyethylene (HDPE) material surrounding the inner pipe and a heat insulating material filled between the inner pipe and the outer pipe Insulating layer.

Polyurethane is mainly used as the insulation material, and the piping line constituting the district heating system is formed by connecting a plurality of double insulation pipes to each other. On the other hand, the appearance and the insulating layer are also referred to as double insulated tubes.

FIGS. 1A and 1B are cross-sectional views illustrating a state where a heat-shrinkable casing is installed outside a conventional double insulated tube. 1C is a cross-sectional view of the inner ends of two double insulated tubes joined to each other. 1D is a cross-sectional view illustrating a state in which heat is applied by moving the heat-shrinkable casing to the connection side of two double insulated tubes.

As shown in the drawing, the connection of the double insulated tube 10 of the prior art includes a cylindrical heat-shrinkable casing 5 surrounding the outer tube 3 of the two double-insulated tubes 10, Which is a urethane foam 4 for inserting the inner pipe 1, and the like.

The process of connecting two double insulated pipes is as follows. First, the heat-shrinkable casing 5 is inserted into one of the two double-side heat-insulating tubes 10, one end of which is exposed to the outside, and the two double-heat- 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 in the form of a ring-shaped strip to the ends of each outer tube 3 of the two double insulated tubes 10, and then the inner tube 1 exposed to the outside is covered with the heat-shrinkable casing 5.

The both ends of the heat shrink casing 5 are heated by a heating means such as a torch lamp to shrink both ends of the heat shrink casing 5 to come in close contact with the outer shell 3. At this time, And sealing between the heat shrinkable casings 5 and the outer tube 3 as the double-sided heat-sealing tape is melted.

Korean Patent No. 10-0839205 (hereinafter referred to as Prior Art 1) discloses a technique for connecting a double insulated pipe. Prior Art 1 discloses a technique of wrapping the ends of two double insulated tubes adjacent to each other with a heat shrinkable sheet (heat shrinkable sheet) and forming inclined surfaces at both ends of the heat shrinkable sheet to attach the inclined surfaces to each other to form a heat shrinkable casing and to wrap the heat shrinkable casing in a heat resistant band .

However, the prior art 1 is complicated to manufacture because it has to form an inclined surface at both ends of the heat shrinkable sheet, and the heat-resistant band is wrapped around the heat shrinkable casing, so that the structure is complicated and a large amount of material is required. When the heat insulating material is filled in the heat shrinkable casing, So that there is a problem that the heat insulating material leaks.

Korean Patent Laid-Open Publication No. 2006-0014306 (hereinafter referred to as Prior Art 2) discloses a technique in which two double insulated tubes adjacent to each other are wrapped around a heat shrinkable sheet a plurality of times and the heat shrinkable sheet is thermally fused .

In the prior art 2, since the heat shrinkable sheet is wound a plurality of times, when the layer and the layer are not closely contacted, a space (gap) is generated therein to lower the sealing force and it is not easy to heat-seal the heat shrinkable sheet .

Also, the double insulated tube manufactured by the method of manufacturing the double insulated tube disclosed in the prior art and the prior art documents and the method of manufacturing the same,

As shown in Figs. 1C to 1E,

An outer tube 3 which is composed of an inner tube 1 which is a steel pipe through which hot water flows and a high-density polyethylene (HDPE) material which surrounds the outer circumferential surface of the inner tube, And a urethane foam (4) which is a heat insulating material filled between the heat insulating layer

A heat shrinkable casing 5 made of a heat shrinkable sheet or a heat shrinkable sheet is heat bonded to both sides of a polyethylene pipe which is the external tube 3 constituting the double heat insulating tube 10 in a horizontal arrangement in a row arrangement, By the connection structure of the double insulated pipe 10 in which the urethane foam 4 which is a heat insulator is filled in the space portion provided between the heat-shrinkable casing 5 made of sheet and the steel pipe as the inner pipe 1;

Particularly, since a space portion in which the urethane foam 4, which is a heat insulating material, is filled between the inner pipe 1 and the heat shrinkable sheet or the heat shrinkable casing 5, the heat shrinkable sheet or the heat shrinkable casing 5 is inserted into the inner pipe 1, Direct heating to the outside of the joining key was not possible:

When the heat shrinkable sheet or the heat shrinkable casing 5 is heated and bonded only to both sides of the polyethylene pipe as the outer tube 3, the bonding force is remarkably lowered and the heat shrinkable sheet or the heat shrinkable casing 5 is adhered to the outside of the polyethylene tube There is a problem that it is difficult to use because it is detached;

In order to improve this, it takes a long time to heat-bond the heat-shrinkable sheet or the heat-shrinkable casing 5 on both sides of the polyethylene pipe, which is the outer tube 3, And the corresponding portion of the heat shrinkable casing 5 stacked on the upper portion of the heat shrinkable casing 5 is separated and difficult to use;

The appearance of the heat shrinkable sheet or the heat shrinkable casing 5 laminated on the inner and outer tubes 1 and 3 should be made larger for filling the urethane foam 4 which is a heat insulating material in the space portion under the heat shrinkable casings 5 ;

In order to manufacture the heat-shrinkable casing 5, the heat-shrinkable sheet, which has been wrapped around the outer surface of the outer tube a large number of times, is difficult to be heated and fired, and the workability is significantly lowered. The layer and the layer of the wound heat-shrinkable sheet are separated from each other to generate a space (gap), thereby lowering the sealing force, resulting in problems of airtightness function, thermal insulation function, and leakage prevention function.

The heat-shrinkable sheet or heat-shrinkable casing 5 is heated and bonded to both outer sides of the outer surface of the polyethylene tube 3 when the inner tube 1 and the inner tube 1 are connected by a fitting, There is a problem that it is deteriorated and inconveniently used;

In order to insert the polyethylene pipe, which is the external pipe 3 of the double insulated pipe, into the heat-shrinkable casing 5, the diameter of the heat-shrinkable casing 5 must be larger than the diameter of the polyethylene pipe of the external pipe 3, And the material cost is increased. At the same time,

Particularly, since the space is formed between the heat-shrinkable casing 5 and the polyethylene pipe as the outer pipe 3 due to the larger diameter of the heat-shrinkable casing 5, the airtightness function, the warming function, In addition,

In order to prevent this, the space formed between the heat-shrinkable casing 5 and the polyethylene pipe 3 as the outer tube 3 must be separately finely treated, thereby significantly reducing workability and drastically increasing the number of deliveries .

Further, a heat-shrinkable sheet or a heat-shrinkable casing 5 of a single laminate constituting the surface layer is laminated on the outside of the polyethylene tube which is the outer tube 3,

The durability performance is deteriorated and the workability due to separation and removal of the heat shrinkable sheet or the heat shrinkable casing 5 to the outside of the polyethylene tube as the outer tube 3 is remarkably lowered, There is a problem that the installation cost is excessively increased.

Korean Patent No. 0839205 Korea Patent No. 0625895 Korean Patent No. 1147507 Korean Patent No. 1382415 Korea Patent Publication No. 2013-0108093 Japanese Laid-Open Patent Application No. 2013-204789 Japanese Patent Application Laid-Open No. 11-230487

According to the method of manufacturing a double heat insulating tube casing for improving the airtightness and keeping warm and the double heat insulating tube casing using the same,

Solving the problems of the prior art;

Particularly, the double insulated tube equipped with the double insulated tube casing of the present invention has enhanced durability, impact resistance, bonding strength, heat insulating property, and airtightness performance and is easy to manufacture;

The composite polyethylene crosslinked sheet constituting the double thermostat casing is pulled out in the transverse direction of the sheet in the range of 20 to 40%, and the length is expanded and contracted at the time of construction on the outside of the polyethylene pipe which is the external appearance of the double- And the workability is improved due to the shortened working time, and the jointing force, heat insulating property, and airtightness performance of the double insulated tube with the double insulated tube casing of the present invention are further enhanced;

An aluminum plate or an incombustible non-combustible material is laminated on an interface between a plurality of double insulation panels and a plurality of double insulation panels, and the durability and impact resistance of the double insulation panel are further enhanced,

At the time of contamination of the outermost layer, the outermost layer is removed and the layer Double insulated tube casing can be used to enhance the stain resistance performance, workability is further improved and installation cost is reduced; It is another object of the present invention to provide a method for manufacturing a double insulated tube casing for improving the airtightness and keeping warmth and a double insulated tube casing using the same.

(LDPE), a low density polyethylene (LLDPE), a high density polyethylene (HDPE) resin, and the like, which are laminated on the heat shrinkable sheet,

(PE) resin or a polypropylene (PP) resin having the same densities laminated on the outside of a heat insulating material filling hole, which is a space portion filled with a heat insulating material of a double heat insulating tube, provided at a lower portion of the composite polyethylene cross- , A method of manufacturing a double insulated tube casing, and a double insulated tube casing using the same;

When installed outside the double insulated pipe,

Compared with the conventional method of manufacturing a double insulated tube casing by radiation crosslinking and the double insulated tube casing using the same, the double insulated tube has enhanced durability, impact resistance, bonding strength, heat insulating property and airtightness performance and is easy to manufacture;

In addition, in the construction in which the composite polyethylene crosslinked sheet constituting the double thermostat casing is pulled outward in the transverse direction of the sheet in the range of 20 to 40%

When a double thermostat casing is installed on the outside of a polyethylene tube, which is the external appearance of the double thermostat, the composite polyethylene crosslinked sheet constituting the double thermostatic casing is 20 to 40% Since it is contracted out of the polyethylene pipe which is the external appearance of the double insulated pipe and is closely attached to the polyethylene pipe which is the appearance of the double insulated pipe, the installation is easier and the working time is shortened remarkably, And at the same time, the jointing force, heat insulating property and airtightness performance of the double insulated tube in which the casing of the present invention is installed are further strengthened;

In addition, a structure in which an iron plate, an aluminum plate, or a non-combustible material that is insoluble in heat is laminated on the interface between a plurality of double insulated tube casings and a plurality of double insulated tube casings, further enhances the durability and impact resistance performance of the double insulated tube,

At the time of contamination of the outermost layer, the outermost layer is removed and the layer The double insulated tube casing can be used, the stain resistance performance is enhanced, the workability is further improved, and the installation cost of the double insulated tube is thereby reduced;

The present invention solves the above-mentioned problems by a method of manufacturing double insulated tube casing for improving airtightness and keeping warmth, and a double insulated tube casing using the same.

According to the "method of manufacturing a double heat insulating tube casing for improving airtightness and keeping warm" and the double heat insulating tube casing using the same,

SUMMARY OF THE INVENTION [0006]

In particular, the durability and impact resistance, bonding strength, heat insulating property, and airtightness performance of the double insulated tube provided with the casing of the present invention are enhanced,

When the double thermostat tube casing is installed outside the polyethylene tube, which is the external appearance of the double thermostat, the double polyethylene thermosetting sheet, which constitutes the double thermostatic tube casing, shrinks outside the polyethylene tube, which is the exterior of the double thermostatic tube, The working time is remarkably shortened, and the workability is greatly improved. Further, the jointing force, heat insulating property and airtightness performance of the double insulated tube equipped with the casing of the present invention are further enhanced;

An effect of reinforcing the durability and the impact resistance performance of the double insulated tube with a structure in which an iron plate, an aluminum plate, or a non-combustible material which is insoluble in heat is laminated on the interface between a plurality of double insulated tube casings and a plurality of double insulated tube casings;

At the time of contamination of the outermost layer, the outermost layer is removed and the layer A double insulated tube casing can be used, which enhances resistance to contamination, improves workability, and reduces installation costs.

FIGS. 1A and 1B are cross-sectional views of a conventional double insulated tube with a heat-shrinkable casing installed thereon,
1C is a cross-sectional view of a conventional double insulated tube in which inner tube ends are coupled to each other,
FIG. 1D is a cross-sectional view of a state in which heat is applied by moving a conventional heat shrinkable casing to the connection side of two double insulated tubes,
FIG. 1E is a cross-sectional view of a conventional heat shrinkable casing sealed and sealed with urethane therein. FIG.
FIG. 2 is a view schematically showing a method of manufacturing a double insulating casing according to a first embodiment of the present invention, and FIG.
FIG. 3 is a block diagram showing a method of manufacturing a double insulating casing according to a first embodiment of the present invention,
FIG. 4 is a perspective view for explaining a double insulated tube casing according to a first embodiment of the present invention, FIG.
5A to 5C are cross-sectional views illustrating a double insulated tube casing according to a first embodiment of the present invention installed in a double insulated tube,
6 is a block diagram showing a method of manufacturing a double insulated tube casing according to a second embodiment of the present invention,
7 is a perspective view for explaining a double insulated tube casing according to a second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings, in which: FIG. 1 is a perspective view of a double insulated tube casing according to an embodiment of the present invention; (Hereinafter, referred to as 'a method of manufacturing a double insulating casing and a double insulating casing using the same' for convenience).

Also, The method of manufacturing the double insulating casing according to the present invention and the corresponding components of the double insulating casing manufactured by the manufacturing method of the present invention include:

'The present invention reinforces the durability and impact resistance, the bonding strength, the heat insulating property and the airtightness performance of the double insulated tube equipped with the double insulated tube casing;

A composite polyethylene crosslinked sheet constituting a double thermally insulated casing is pulled out to the outside in the transverse direction of the sheet in a range of 20 to 40%, and the length is expanded and tentered to the outside of the outer appearance of the polyethylene pipe So that the installation is easier and the working time is remarkably shortened to improve the workability and the jointing force, the heat insulating property and the airtightness performance of the double insulated tube with the casing of the present invention are further strengthened;

In addition, a structure in which an iron plate, an aluminum plate, or a non-combustible material which is insoluble in heat is laminated on the interface between a plurality of double insulation panels and a plurality of double insulation panels is further reinforced,

At the time of contamination of the outermost layer, the outermost layer is removed and the layer The use of double thermostat casings enhances resistance to contamination, improves workability and reduces installation costs; Easy to manufacture;

It is made clear that it is composed of " a method of manufacturing a suitable structure and a double insulated tube casing manufactured by the method of manufacturing thereof ";

In addition, the composition of the double heat insulating casing of the present invention The numerical values mentioned in the manufacturing method and the double insulated tube casing manufactured by the manufacturing method are not simply described as numerical values, but the applicant has spent a lot of time and effort, ≪ / RTI >

It is to be understood that the present invention is not limited to the embodiments described below, and that the present invention is not limited to the embodiment, Clearly included.

FIG. 2 is a view schematically showing a method of manufacturing a double insulating casing according to a first embodiment of the present invention, and FIG.

3 is a block diagram showing a method of manufacturing a double insulated tube casing according to a first embodiment of the present invention.

As shown, it is installed outside a double insulated pipe 20 for supplying heat to a large area including an apartment complex or a commercial building, or supplying hot water for tap water;

The 'method for manufacturing the double insulated tube casing 100' according to the first embodiment of the present invention comprises the following steps S1 to S6. (Product configuration diagram and installation state diagram: see Fig. 4 and Figs. 5A to 5C)

Step S1: A composite polyethylene resin comprising 20 to 65% by weight of high-density polyethylene and 20 to 45% by weight of linear low-density polyethylene and 15 to 35% by weight of low-density polyethylene having different densities is introduced into an extruder at an extrusion temperature of 220 to 240 캜 Preparing an extruded composite polyethylene cross-linked sheet, winding the extruded composite polyethylene cross-linked sheet on a take-up roll, And

(20 to 65% by weight of high density polyethylene (HDPE) and 20 to 45% by weight of linear low density polyethylene (LLDPE) and 15 to 35% by weight of low density polyethylene (LDPE) based on 100% by weight of the composite polyethylene resin Is fed into the extruder 31, the composite polyethylene cross-linked sheet 120 extruded into a sheet at an extrusion temperature of 220 to 240 캜 is produced, wound on a take-up roll 32, and then cooled at room temperature.

Step S2: winding or winding a thermally shrinkable sheet made of polyethylene or polypropylene having the same density on a winding roll and then winding it on a rotatable jig; Wow,

After winding or winding up the heat-shrinkable sheet 110 made of polyethylene (HDPE) or polypropylene (PP) having the same density, for example, in the winding roll 33, .

Step S3:

The composite polyethylene crosslinked sheet prepared in the step S1 is pulled to the outside in the transverse direction of the sheet in the range of 20 to 40% so that the length of the composite polyethylene crosslinked sheet expands to the outside Stretching; Wow,

(The composite polyethylene cross-linked sheet 120 produced in step S1 and wound on the take-up roll is pulled to the outside in the transverse direction of the sheet in the range of 20 to 40% by the tension machine to form the composite double- The length of the polyethylene bridge sheet 120 is expanded and stretched in the transverse direction of the sheet.)

Step S4:

The length of the composite polyethylene stretch sheet wound on the take-up roll is extended to the outside in the range of 20 to 40% of the step S3 in the outside of the heat-shrinkable sheet wound on the jig in step S2 so that the lengths of both sides are longer than the lengths of both sides of the heat- Laminating a composite polyethylene crosslinked sheet having an elongated shape and having an extended surface, heating and bonding the laminate to 160 to 200 캜 by hot air in hot air; Wow,

(The composite polyethylene cross-linked sheet that is stretched outward in the transverse direction of the sheet to the outside in the range of 20 to 40% of the step S3 on the outside of the heat shrinkable sheet 110 wound on the jig 34 in the step S2, The length of both side portions of the polyethylene crosslinked sheet is longer than the length of both side portions of the heat shrinkable sheet 110 so that the composite polyethylene crosslinked sheet 120 provided with the extended surface 122 is laminated and heated by hot air at 160 to 200 DEG C And is bonded to the substrate.

Step S5:

The jointed heat-shrinkable sheet and the composite polyethylene cross-linked sheet of step S4 are cooled at room temperature, and then the jig is detached and disassembled to produce a double heat insulating pipe casing as an article;

(The jointed heat-shrinkable sheet 110 in step S4 and the composite polyethylene bridge sheet 120 are cooled at room temperature and then the jig 34 is taken out to the outside and disassembled to produce a double heat insulating casing 100 as an article of finished product. )

Also as required;

S2, S3, S4, S41, and S5 in which the subsequent process of step S4 and the previous process of step S5 are additionally provided with the following step S41.

Step S41:

The extension faces provided on both side portions of the composite polyethylene cross- A step of providing a heated joint portion by being pressed against the outer surface of the jig so as to be adhered thereto;

(The extensible surface 122 provided on both sides of the bonded composite polyethylene bridge sheet 120 in step S4 is pressed against the outer surface of the jig 34 so as to adhere to both sides of the composite polyethylene bridge sheet 120 A heating joint portion 123 is provided to be heated and bonded to the outside of the polyethylene pipe which is the outer tube 22 of the double insulated tube 20 with a tapered inclined surface 1231 having an inclination angle of 45 ° and a tapered inclined surface and an extended horizontal surface 1232 .)

The step S2 further includes the steps of:

The present invention is not limited to the method of manufacturing the present invention , which is included in the content of the present invention , which was filed on Oct. 10, 2016 and registered as a patent registration No. 10-1737346 on May 27,

According to the present invention, in the method for manufacturing a double insulation tube casing manufactured in step S2,

In the previous step and the subsequent step of step S2,

≪ Step S1, < / RTI > in which a composite polyethylene crosslinked sheet is prepared; And

Wherein the composite polyethylene cross-linked sheet of step < RTI ID = 0.0 > S3 < / RTI & So that the length of the composite polyethylene cross-linked sheet is expanded and stretched outward in the transverse direction of the sheet; Wow,

The step of joining the composite polyethylene crosslinked sheet and the heat shrinkable sheet provided with the extended surface by forming the composite polyethylene crosslinked sheet in the step S4 at a longer side than the length of both side portions of the heat shrinkable sheet, Including the step of providing a junction ')

Wherein the double heat insulating casing of the present invention having the structure in which the heat shrinkable sheet and the composite polyethylene crosslinked sheet are bonded to each other in the step S5 is manufactured as a main part of the present invention.

Also as required;

The composite polyethylene cross-linked sheet 120 of the step S1 is a cross-

2 to 3.5 parts by weight of a crosslinking agent containing silane, 1.5 to 3.0 parts by weight of an ultraviolet blocking agent containing a UV stabilizer and 0.5 to 3 parts by weight of a colorant 0.5 containing carbon black, based on 100 parts by weight of the composite polyethylene resin. To 1.5 parts by weight based on the total weight of the composition.

Accordingly, the 'method for manufacturing a double insulated tube casing' of the present invention includes:

SUMMARY OF THE INVENTION [0006]

In particular, by the heat shrinkable sheet 110 made of the polyethylene or polypropylene resin of the present invention, which is laminated on the outside of the heat insulating material filling hole which is the space portion 231 filled with the heat insulating material of the double heat insulating tube 20, 100 are improved in durability and impact resistance performance,

The durability and impact resistance performance of the double insulation can casing 100 is further enhanced by the composite polyethylene bridge sheet 120 composed of 20 to 65% by weight of the high density polyethylene resin constituting the composite polyethylene bridge sheet 120 of the present invention And,

A composite polyethylene bridge sheet 120 composed of 20 to 45% by weight of a linear low density polyethylene resin and 15 to 35% by weight of a low density polyethylene resin is further improved in workability and stretchability of the double insulation tube casing 100,

A method for producing a composite polyethylene bridge sheet (120) comprising 20 to 65% by weight of a high density polyethylene resin and 20 to 45% by weight of a linear low density polyethylene resin and 15 to 35% by weight of a low density polyethylene resin, the densities of which are different from each other;

The present invention is more easily manufactured by the double heat insulating casing 100 of the present invention in which the heat shrinkable sheet 110 and the composite polyethylene crosslinked sheet 120 are integrally joined together,

When the double insulated tube casing (100) of the present invention is installed outside the double insulated tube (20), the durability and impact resistance, bonding strength, heat insulating property and airtightness performance of the double insulated tube (20) A manufacturing method;

In addition, when the double heat insulation casing 100 of the present invention is installed outside the polyethylene tube which is the outer tube 22 constituting the double heat insulation tube 20:

The composite polyethylene cross-linked sheet 120 made of 20 to 65% by weight of a high-density polyethylene resin and 20 to 45% by weight of a linear low-density polyethylene resin and 15 to 35% by weight of a low-density polyethylene resin having different densities is in a range of 20 to 40% A composite polyethylene bridge sheet 120 of a configuration in which the length is extended by being pulled outward in the transverse direction of the sheet,

20 to 40% is pulled outward in the transverse direction of the sheet, and the length thereof is extended, so that it is tightly adhered to the outside of the polyethylene tube, which is the outer tube 22 of the double insulated tube 20, The workability is improved, and at the same time,

A manufacturing method of a double heat insulation casing (100) according to the present invention is a manufacturing method in which a double insulation unit (20) having a double insulation unit casing (100) is further improved in joint strength, heat insulation and airtightness.

The extended polyethylene pipe 120 is provided with the extended surface 122 having the length of both side portions longer than the length of both side portions of the heat shrinkable sheet 110,

The composite polyethylene bridge sheet 120 is laminated and bonded onto the heat shrinkable sheet 110 which is laminated on the outside of the heat insulating material filling hole which is the space portion 231 (see FIGS. 5A and 5B) filled with the heat insulating material of the double heat insulating tube 20 ,

The extensible surface 122 provided on both side portions of the composite polyethylene bridge sheet 120 is pressed against the outer surface of the jig 34 so that the composite polyethylene bridge sheet 120 is provided at both sides with an inclination angle of 10 to 45 And a heating joint portion 123 which is easily heated and bonded to the outside of the polyethylene pipe which is the outer tube 22 of the double insulated tube 20 by the tapered inclined surface 1231 and the tapered inclined surface and the extended horizontal surface 1232; And a method of manufacturing the double insulation casing (100).

FIG. 4 is a perspective view for explaining a double insulated tube casing according to a first embodiment of the present invention, FIG.

FIGS. 5A to 5C are cross-sectional views illustrating installation of a double insulated tube casing according to a first embodiment of the present invention in a double insulated tube.

The double insulated tube 20, which is manufactured by the manufacturing method of the first embodiment and is provided outside the double insulated tube 20 for supplying heat to the large area including the apartment complex or the commercial building of the present invention or supplying hot water for tap water, The tube casing (100) 'comprises:

1) a heat shrinkable sheet 110 made of polyethylene resin or polypropylene resin having the same density and laminated on the outside of a heat insulating material filling hole which is a space portion 231 filled with a heat insulating material of the double heat insulating tube 20;

2) 20 to 65% by weight of high-density polyethylene having different densities and 20 to 45% by weight of linear low-density polyethylene based on 100% by weight of the composite polyethylene resin laminated and integrally bonded to the outside of the heat-shrinkable sheet 110, The composite polyethylene crosslinked sheet 120 composed of 15 to 35% by weight of polyethylene is stretched outward in the transverse direction of the sheet in the range of 20 to 40%, and the length thereof is extended, and the length of both side portions is shorter than the length of both sides of the heat shrinkable sheet 110 A composite polyethylene bridge sheet (120) having an elongated extension surface (122);

The heat shrinkable sheet 110 and the heat shrinkable sheet 110 are laminated on the outside of the heat shrinkable sheet 110, A double thermostat casing (100) composed of a composite polyethylene crosslinked sheet (120) pulled outward and extended in length comprises:

An outer tube 22 which is composed of an inner tube 21 which is a steel pipe through which hot water flows and a high-density polyethylene (HDPE) material which surrounds the outer circumferential surface of the inner tube 21, (20) composed of a heat insulating layer (23) composed of a heat insulating material filled in a space (231) between the heat insulating layer (22)

The heat shrinkable sheet 110 constituting the double thermostat pipe casing 100 when stacked and installed outside the polyethylene pipe as the external pipe 22 is a space portion 231 filled with the heat insulating material of the double thermostat pipe 20 The composite polyethylene crosslinked sheet 120 laminated on the outside of the heat insulating material filling hole and laminated on the outside of the heat shrinkable sheet 110 is pulled out in the lateral direction of 20 to 40% A double insulated tube casing 100 which is shrunk outside the polyethylene tube as the outer tube 22 of the double insulated tube 20 as the extended length thereof and is in close contact with the polyethylene tube which is the outer tube 22 of the double insulated tube 20 .

The extension surfaces 122 provided at both sides of the composite polyethylene bridge sheet 120 are tapered inclined surfaces 1231 and tapered inclined surfaces 1231 having an inclination angle of 10 to 45 degrees and extended horizontal surfaces 1232, And a heat-joining portion 123 which is heat-bonded to the outside of the polyethylene pipe which is the outer surface 22 of the double-sided thermocycling casing 100.

A polyethylene pipe which is an outer pipe 22 surrounding the outer circumferential surface of the inner pipe 21 and a hollow pipe 22 which is a space between the inner pipe 21 and the outer pipe 22, (23) composed of a heat insulating material filled in a heat insulating material filling hole (231);

A heat shrinkable sheet 110 made of polyethylene resin or polypropylene resin having the same density as the present invention is laminated on the outside of the heat insulating material filling hole which is the space portion 231 between the inner tube 21 and the outer tube 22,

The outer tube (22) of the double insulated tube is composed of 20 to 65% by weight of high density polyethylene having different densities according to the present invention, 20 to 45% by weight of linear low density polyethylene and 15 to 35% by weight of low density polyethylene A double thermosensitive tube casing 100 composed of a composite polyethylene crosslinked sheet 120 is laminated;

The durability and impact resistance performance of the double thermostat casing 100 is enhanced by the composite polyethylene crosslinked sheet 120 composed of 20 to 65% by weight of the high density polyethylene resin constituting the composite polyethylene crosslinked sheet 120 of the present invention ;

A composite polyethylene bridge sheet 120 composed of 20 to 45% by weight of a linear low density polyethylene resin and 15 to 35% by weight of a low density polyethylene resin is further improved in workability and stretchability of the double insulation tube casing 100,

A composite polyethylene cross-linked sheet 120 comprising 20 to 65% by weight of a high density polyethylene resin and 20 to 45% by weight of a linear low density polyethylene resin and 15 to 35% by weight of a low density polyethylene resin, the densities of which are different from each other;

The durability and impact resistance, bonding strength, heat insulating property and airtightness performance of the double insulated tube 20 are improved by the double thermostat casing 100 in which the heat shrinkable sheet 110 and the composite polyethylene crosslinked sheet 120 are integrally joined together And is composed of a double-insulated tube casing (100) of reinforced construction.

Also, after the double insulated tube casing 100 laminated on the outside of the polyethylene tube, which is the outer tube 22 of the double thermostat tube 20,

The composite polyethylene cross-linked sheet 120 is pulled outward in the transverse direction of the sheet in the range of 20 to 40% The outer tube 22 of the double insulated tube 20 is shrunk outside the polyethylene tube so as to be in close contact with the polyethylene tube 22 which is the outer tube 22 of the double insulated tube 20,

The workability can be improved and the working time can be remarkably shortened and the workability can be improved. In addition, the bonding strength and the heat insulating property of the double insulated tube 20 provided with the double thermostat casing 100 of the present invention, A double insulated tube casing (100) with a more enhanced airtightness performance;

The extension surfaces 122 provided at both sides of the composite polyethylene bridge sheet 120 are tapered inclined surfaces 1231 and tapered inclined surfaces 1231 having an inclination angle of 10 to 45 degrees and extended horizontal surfaces 1232, And a heating joint part 123 which is easily heated and bonded to the outside of the polyethylene pipe which is the outer appearance 22 of the double-sided heat pipe casing 100.

6 is a block diagram showing a method of manufacturing a double insulated tube casing according to a second embodiment of the present invention,

7 is a perspective view for explaining a double insulated tube casing according to a second embodiment of the present invention.

The 'method for manufacturing the double insulating tube casing 100' according to the second embodiment of the present invention is a method for manufacturing a double insulating tube casing manufactured by steps S1 to S5 of the first embodiment, , Which is a subsequent step of the step S5 of the first embodiment, is characterized by being manufactured by the manufacturing method of the following step S6.

Step S6:

A plurality of double insulation panels are manufactured by stacking a plurality of double insulation panels in S5, and a plurality of double insulation panels are stacked and laminated on the interface between the plurality of insulation panels. step

(A thin iron plate or an aluminum plate or a heat-incompatible incombustible material 130 having a thickness of 0.1 to 0.5 mm is laminated on a boundary surface of each of the plurality of double heat insulation casing casings 100, And a plurality of double insulated tube casings 100 laminated in a laminator at a temperature of 70 to 90 DEG C are produced.

In addition, it is also possible to provide a double insulation pipe 20, which is manufactured by the manufacturing method of the second embodiment and is installed outside the double insulation pipe 20 for supplying heat to a large area including an apartment complex or a commercial building of the present invention or supplying hot water for tap water, The double gassing casing (100) 'comprises:

1) a heat shrinkable sheet 110 made of polyethylene resin or polypropylene resin having the same density and laminated on the outside of a heat insulating material filling hole which is a space portion 231 filled with a heat insulating material of the double heat insulating tube 20;

2) 20 to 65% by weight of high density polyethylene having different densities, 20 to 45% by weight of linear low density polyethylene, 15 to 35% by weight of low density polyethylene based on 100% by weight of the composite polyethylene resin laminated on the outside of the heat shrinkable sheet 110 The composition in weight%

Is pulled out in the lateral direction of the sheet in the range of 20 to 40% Comprising: a plurality of double insulated tube casings (100) composed of a length-expanded composite polyethylene bridge sheet (120);

And a double insulated tube casing 100 in which a thin steel plate or an aluminum plate having a thickness of 0.1 to 0.5 mm or a non-combustible material 130 which is not heat-insoluble is laminated on the interface between a plurality of double insulated tube casings.

Accordingly, the method for manufacturing the double insulating casing according to the second embodiment of the present invention and the double insulating casing 100 include:

An aluminum plate or an incombustible material (130) which is insoluble in heat is laminated on each interface of a plurality of double insulated tube casings and a plurality of double insulated tube casings (100). More durability and impact resistance;

When stacking the outside of the double insulated tube 20, an iron plate, an aluminum plate, or a heat-incompatible incombustible material 130 provided at an interface of each double insulated tube casing 100, when the double insulated tube casing as the outermost layer is contaminated, The double heat insulating casing and the iron plate or aluminum plate or the heat-incapable incombustible material 130, which is the cut surface, are easily removed from the surface of the heat-

[0030] In addition Other It is possible to use the double insulated tube casing 100 to enhance the pollution resistance performance, workability is further improved, and installation cost is reduced; A method of manufacturing a double heat insulating casing and a double heat insulating casing (100).

Also as required;

In the first and second embodiments of the present invention,

A composite polyethylene crosslinked sheet 120 consisting of 20 to 65% by weight of high density polyethylene having different densities, 20 to 45% by weight of linear low density polyethylene and 15 to 35% by weight of low density polyethylene, based on 100% by weight of the composite polyethylene resin;

2 to 3.5 parts by weight of a crosslinking agent containing silane , 1.5 to 3.0 parts by weight of an ultraviolet screening agent containing a UV stabilizer and 0.5 to 3 parts by weight of a colorant 0.5 containing carbon black (based on 100 parts by weight of a composite polyethylene resin) To 1.5 parts by weight of the composite polyethylene crosslinked sheet (120).

Further, a method of manufacturing a double insulating casing of the present invention and a double insulating casing using the same,

Other than being installed on the outside of the double insulated tube 20 according to the first and second embodiments of the present invention,

And a buoyant body is sealed by heating and shrinking on the outside of the buoyant body, which is the body of the buoy for the ocean, and a dual warming-tube casing (100).

It goes without saying that the double heat insulation tube and the double heat insulation tube casing of the same technical idea as the same manufacturing method of the present invention may be laminated and used in other fields besides the buoy for marine use.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

100: Double insulated tube casing of the present invention ('Double insulated tube casing for improving airtightness and keeping warm')
110: Heat shrinkable sheet
120: Composite polyethylene crosslinked sheet
121: Main body 122: Extension surface
123:
1231: tapered inclined surface 1232: horizontal surface
130: Nonflammable material
20: Double insulated tube
21: Inner pipe
22: Appearance
23: heat insulating layer 231:
31: extruder 32: winding roll
33: winding roll 34: jig
10 Conventional double insulated tube
1: Inner pipe
2: Protective layer
3: Appearance
4: urethane foam
5: Heat shrinkable casing

Claims (10)

It is installed outside a double insulated pipe supplying heat to a large area including an apartment complex or a commercial building, or supplying hot water for tap water,
Step S2: winding or winding a thermally shrinkable sheet made of polyethylene or polypropylene having the same density on a winding roll and then winding it on a rotatable jig; A method for manufacturing a double insulated tube casing comprising:

In the previous step and the subsequent step of step S2,
Step S1:
A composite polyethylene resin comprising 20 to 65% by weight of high-density polyethylene and 20 to 45% by weight of a linear low-density polyethylene and 15 to 35% by weight of low-density polyethylene having different densities and being extruded at an extruder and extruded at a temperature of 220 to 240 캜 Preparing a polyethylene crosslinked sheet, winding it on a winding roll, and cooling; And
Step S3:
The composite polyethylene cross-linked sheet prepared in the step S1 is in the range of 20 to 40% Sheet So that the length of the composite polyethylene crosslinked sheet is expanded and expanded to the outside; Wow,
Step S4:
The length of the composite polyethylene stretch sheet wound on the take-up roll is extended to the outside in the range of 20 to 40% of the step S3 in the outside of the heat-shrinkable sheet wound on the jig in step S2 so that the lengths of both sides are longer than the lengths of both sides of the heat- Laminating a composite polyethylene crosslinked sheet having an elongated shape and having an extended surface, heating and bonding the laminate to 160 to 200 캜 by hot air in hot air; Wow,
Step S5:
The jointed heat-shrinkable sheet and the composite polyethylene cross-linked sheet of step S4 are cooled at room temperature, and then the jig is detached and disassembled to produce a double heat insulating pipe casing as an article; The method of manufacturing a double heat insulation pipe casing for airtightness improvement and insulation. It is installed outside a double insulated pipe supplying heat to a large area including an apartment complex or a commercial building, or supplying hot water for tap water,
Step S2: a heat shrinkable sheet made of polyethylene or polypropylene having the same density is prepared or prepared and wound on a winding roll, then wound on a rotatable jig;

In the previous step and the subsequent step of step S2,
Step S1:
A composite polyethylene resin comprising 20 to 65% by weight of high-density polyethylene and 20 to 45% by weight of a linear low-density polyethylene and 15 to 35% by weight of low-density polyethylene having different densities and being extruded at an extruder and extruded at a temperature of 220 to 240 캜 Preparing a polyethylene crosslinked sheet, winding it on a winding roll, and cooling; And
Step S3:
The composite polyethylene cross-linked sheet prepared in the step S1 has a ratio of 20 to 40% So that the length of the composite polyethylene crosslinked sheet is expanded and expanded to the outside; Wow,
Step S4:
The length of the composite polyethylene stretch sheet wound on the take-up roll is extended to the outside in the range of 20 to 40% of the step S3 in the outside of the heat-shrinkable sheet wound on the jig in step S2 so that the lengths of both sides are longer than the lengths of both sides of the heat- Laminating a composite polyethylene crosslinked sheet having an elongated shape and having an extended surface, heating and bonding the laminate to 160 to 200 캜 by hot air in hot air; Wow,
Step S5:
The jointed heat-shrinkable sheet and the composite polyethylene cross-linked sheet of step S4 are cooled at room temperature, and then the jig is detached and disassembled to produce a double heat insulating pipe casing as an article; Wow,
Step S6:
A plurality of double insulation panels are manufactured by stacking a plurality of double insulation panels in S5, and a plurality of double insulation panels are stacked and laminated on the interface between the plurality of insulation panels. step; The method of manufacturing a double heat insulation pipe casing for airtightness improvement and insulation. The method according to claim 1 or 2,
In the subsequent process of step S4 and the previous process of step S5,
Step S41:
A step of pressing the extensible surface provided at both side portions of the composite polyethylene cross-linked sheet in Step S4 so as to adhere to the outer surface of the jig so as to provide a heat joint portion; A method of manufacturing a tube casing. The method according to claim 1 or 2,
The composite polyethylene cross-linked sheet of the step (S1)
2 to 3.5 parts by weight of a crosslinking agent containing silane, 1.5 to 3.0 parts by weight of an ultraviolet blocking agent containing a UV stabilizer, and 0.5 to 1.5 parts by weight of a coloring agent containing carbon black, based on 100 parts by weight of the composite polyethylene resin , A method for manufacturing a double insulated tube casing for improving airtightness and keeping warm. The method according to claim 1 or 2,
The double insulated tube casing manufactured by the above-
And the buoyant body is sealed by heating and shrinking on the outside of the buoyant body, which is the body of the buoy for the ocean, so as to improve airtightness and keep warm. Double insulated casings installed outside of double insulated pipes which supply heat to large areas including apartment buildings and commercial buildings or supply hot water for water supply;

A heat shrinkable sheet made of polyethylene resin or polypropylene resin having the same density and laminated on the outside of a heat insulating material filling hole which is a space portion filled with a heat insulating material of the double heat insulating tube;
20 to 65% by weight of high density polyethylene having different densities, 20 to 45% by weight of linear low density polyethylene and 15 to 35% by weight of low density polyethylene, based on 100% by weight of the composite polyethylene resin laminated on the outside of the heat shrinkable sheet And
Characterized in that the sheet is constituted by a composite polyethylene cross-linked sheet having an extended surface which is pulled outward in the transverse direction of the sheet in a range of 20 to 40%, the length of which is extended and the length of both side portions is longer than the length of both sides of the heat- Double insulated casings for improved airtightness and insulation. Double insulated casings installed outside of double insulated pipes which supply heat to large areas including apartment buildings and commercial buildings or supply hot water for water supply;

A heat shrinkable sheet made of polyethylene resin or polypropylene resin having the same density and laminated on the outside of a heat insulating material filling hole which is a space portion filled with a heat insulating material of the double heat insulating tube;
20 to 65% by weight of high density polyethylene having different densities, 20 to 45% by weight of linear low density polyethylene and 15 to 35% by weight of low density polyethylene, based on 100% by weight of the composite polyethylene resin laminated on the outside of the heat shrinkable sheet And a plurality of double thermostat casings composed of a stretched composite polyethylene cross-linked sheet pulled outward in the transverse direction of the sheet in the range of 20 to 40%;
Characterized in that an iron plate or an aluminum plate or a non-combustible material which is insoluble in heat is laminated on the interface of each of the plurality of double insulated tube casings. The method as claimed in claim 6 or 7,
As the composite polyethylene crosslinked sheet is laminated outside the polyethylene pipe which is the external appearance of the double insulation pipe, and the length is extended to the outside in the transverse direction of the sheet in the range of 20 to 40% , And is tightly adhered to the inside of the casing. The method of claim 6, further comprising:
Characterized in that a heating joint provided at both side portions of the composite polyethylene crosslinked sheet is provided with a tapered inclined surface having an inclination angle of 10 to 45 degrees and a tapered inclined surface and an extended horizontal surface, Double insulated casings for improved airtightness and insulation. The method as claimed in claim 6 or 7,
Wherein the double insulated tube casing comprises:
And the buoyant body is sealed by heating and shrinking on the outside of the buoyant body which is the body of the ocean buoy.

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