KR102452441B1 - double insulation pipe use for freeze protection, heat wire protection and installation method thereof - Google Patents

Abstract

The present invention relates to a dual insulation pipe provided with a pipe for protecting a freeze protection heat wire, capable of preventing damage to a heat wire installed to prevent a freezing burst of a dual insulation pipe supplying service water, water supply pipe water, and industrial water to each area including an apartment complex, a commercial building, industrial and residential areas through a water resources corporation or a waterworks supply system, and solving an issue of a heat joint part and inconveniences in work for connecting a heat wire to the dual insulation pipe, and an installation method thereof. More specifically, the present invention relates to the dual insulation pipe provided with a pipe for protecting a freeze protection heat wire, capable of preventing the material expansion of an insulator and damage to a heat wire, facilitating work for connecting the heat wire to each of a plurality of dual insulation pipes, securing the safety of a heat wire joint part, while bringing about construction convenience in which the heat wire is assembled at a stroke through a heat wire pulling wire without a heat wire joint part, and reducing construction costs and a construction period by eliminating the need for onsite insulation work; reducing maintenance costs (driving costs) due to a low thermal loss, and eliminating the need for regular insulator replacement and repair; reinforcing the durability and insulation performance of the dual insulation pipe, facilitating temperature control and maximizing heat supply, and securing the safety of the heat wire, and an installation method thereof.

Description

Double insulation pipe use for freeze protection, heat wire protection and installation method thereof

The present invention relates to 'a double insulation tube equipped with a pipe for protection against freezing heat rays and a method for installing the same',

More specifically, to prevent damage to the heating wire installed inside the double insulation tube in order to prevent freezing of the double insulation tube, the efficiency of the work of connecting the heating wire to the double insulation tube, and to solve the problem of the hot wire joint, 'freeze prevention' It relates to a double insulation pipe provided with a pipe for heat ray protection and a method for installing the same;

According to the configuration of the present invention, 'double insulation pipe provided with a pipe for protection against freezing and heat wire and its installation method';

Damage to the heating wire due to expansion and heat caused by polyol and MDI (Methylene Diphenyl Diisocyanate), which are raw materials for insulation, inconvenient work to connect the heating wire to each of a plurality of double insulation tubes, and overheating or disconnection of the heating wire joint At the same time this was resolved,

It is easy to install when constructing a hot wire and piping, so workability is further improved, and the convenience of assembling a hot wire at once without a joint of the hot wire using a hot wire pulling jig and the safety of the hot wire are given.

Construction cost and construction period are further shortened as on-site warming work is unnecessary.

Since there is little heat loss, maintenance costs (operating costs) are reduced, and regular replacement and repair of insulating materials are unnecessary.

Durability, heat preservation, and insulation performance of the double insulation tube are strengthened, temperature control is easy, and heat supply is maximized; It relates to 'a double insulation tube equipped with a pipe for protection against freezing heat rays and a method for installing the same'.

In general, in order to supply tap water, water for water supply, and industrial water to each area including apartment complexes, commercial buildings, industries, and residential areas through the Water Resources Corporation or the water supply system and combined heat and power supply system, the double exposed to the outside of the inner pipe, which is the water supply pipe Insulation tube is used.

In addition, the double insulation tube is a steel pipe or copper pipe or stainless pipe or aluminum (AL) pipe or an inner pipe including a synthetic resin pipe through which water flows, and a synthetic resin material including polyethylene (PE) surrounding the outer circumferential surface of the inner pipe or aluminum (AL) It is composed of a tube and an insulating layer composed of a heat insulating material filled between the inner tube and the outer tube.

Polyurethane is mainly used as an insulator, and the piping line constituting the district heating or water supply system is made by connecting a plurality of double insulating tubes to each other. On the other hand, the exterior and the insulating layer is also called a double insulating tube.

As shown in Figure 1, the prior art double insulation tube 200 is;

A cylindrical shape surrounding the outer tube 202 of the inner tube 201, which is a steel pipe, the outer tube 202, which is a polyethylene tube provided on the upper part of the inner tube 201, and a plurality of double insulation tubes 200 composed of inner and outer tubes 201 and 202 It is composed of a heat-shrinkable casing 203 and a heat-shrinkable casing 203 filled with a double insulation tube 200 including a heat insulating material that is a urethane foam to insulate the inner tube 201 .

In addition, the conventional piping for transporting various fluids including the double insulation tube 200 of the above configuration uses a method of winding a freeze protection heater on the outer periphery of the pipe for freezing prevention and a method of embedding a heater in the pipe itself. are doing

Utility model registration No. 219527, which uses nichrome wire as a heating wire, utility model registration No. 293218 in which a thin nichrome wire is wound on a fiber bundle, and utility model registration No. 137043 that discloses a polymer heater with autonomously controlled temperature arc is known;

They are in the form of a cord having a thickness of about 2 to 3 mm and a width of about 10 mm, and since they are thick, flexibility is low, and adhesion and workability are poor when winding on a pipe; As a result, the heat transfer efficiency of transferring the heat generated from the heating wire to the pipe is low, and the manufacturing cost and installation cost are excessive.

On the other hand, the electric heating insulation piping structure of Utility Model Registration No. 367343 includes a piping having a built-in heater to prevent freezing;

A carbon heating wire coated with carbon and silicon on the outer periphery of the fiber yarn is fabricated in a mesh shape with an auxiliary wire made of fiber yarn with a certain width and length, and then a carbon heating element coated with an insulating material such as silicon is wound on the outer surface of the pipe, and the outer periphery of the wire is wound. Disclosed is a technology surrounding the insulation material.

However, the heat insulation pipe is made by weaving a carbon heating wire coated with carbon and silicon on the outer periphery of the fiber yarn into a net of a certain width and length together with an auxiliary wire so that the carbon heating element has a constant area in the shape of a ribbon, and then coating it with an insulating material. Due to this complexity, the manufacturing cost is excessive, and there are problems that the installation workability is significantly lowered.

As described above, most of the conventional anti-freeze pipes use a heating element made of a nichrome wire or a hot wire material having a circular cross section. There is a problem in that the double insulation tube freezes or freezes when the outside air temperature is low below zero due to the decrease in thermal insulation due to deterioration;

In particular, the heat wire for preventing freezing of the conventional double insulation tube is fixed to the outer surface of the inner tube provided inside each of the plurality of double insulation tubes with a band or tape, and then, when foaming the urethane foam, the insulation material, polyol, a raw material of the insulation material (PolyOl) and MDI (Methylene Diphenyl Diisocyanate) damage the heating wire due to expansion and heat, the inconvenience of connecting the heating wire to each of the plurality of double insulation tubes, and the problem of overheating or disconnection of the heating wire joint due to high temperature. ;

A separate thermal insulation work is required at the construction site, which further increases the construction cost and construction period, and the manufacturing cost is excessive. This inconvenient problem is occurring.

The problems of the prior art are solved by the 'double insulation tube provided with a pipe for protection against freezing heat rays and its installation method' of the present invention, and:

In particular, damage to the heating wire occurs due to expansion and heat caused by polyol and MDI (Methylene Diphenyl Diisocyanate), which are raw materials for insulation, inconvenient work to connect the heating wire to each of the plurality of double insulation tubes, and overheating or disconnection of the heating wire joint At the same time the problem is solved,

It is easy to install when constructing a hot wire and piping, so workability is further improved, and the convenience of assembling a hot wire at once without a joint of the hot wire using a hot wire pulling jig and the safety of the hot wire are given.

Construction cost and construction period are further shortened as on-site warming work is unnecessary.

Since there is little heat loss, maintenance costs (operating costs) are reduced, and regular replacement and repair of insulating materials are unnecessary.

It is a double insulation tube provided with a heat wire protection pipe integrally provided outside the inner tube of the double insulation tube. Unlike the connection method, the construction period and cost are reduced,

The sealing power is strengthened and moisture, air, and bacteria are completely blocked from the outside, so the life of the double insulation tube is extended, the thermal insulation effect is improved, the inner tube corrosion caused by static electricity in the ground and underwater is prevented, and the temperature, pressure, and fluid types The range of use is wide, so steam and cold. It can be applied to hot water, condensed water, and other chemicals.

Durability, heat preservation and insulation performance of the double insulation tube are strengthened, temperature control is easy, and heat supply is maximized; It is an object of the present invention and a technical problem to be achieved by the present invention to provide 'a double insulation tube equipped with a pipe for protection against freezing heat rays and a method for installing the same'.

The composition of the present invention, 『 Double insulating tube inner and outer tube body;

a pipe for heat ray protection provided on the outside of the inner tube;

+, - power heating wire (30', 30) provided in the pipe for protecting the heating wire, the +, - power supply connection part 31 to which power is supplied, and the heating wire pulling jig 32 formed on one side for the movement of the heating wire ") consisting of a heating wire 30 and;

a plurality of centering rings provided on the outside of the inner tube and the heat ray protection pipe, and the inner and outer tubes are uniformly filled with an insulating material between the inner and outer tubes;

Insulation of a rigid polyurethane foam (Rigid Polyurethane Foam) with a low thermal conductivity of 0.0182W/Mk to 0.0256W/Mk, which is injected and filled between the inner and outer surfaces;

a control box connected to the power connection part of the heating wire for power supply and temperature control of the heating wire; 'Double insulation tube equipped with a pipe for protection against freezing heat rays' of the present invention, and,

In the configuration of the present invention, " S1 step: manufacturing the inner tube and the outer tube, which is a double insulation tube, and welding the joints of the inner and outer tubes of a plurality of configurations, respectively; Wow,

Step S2: manufacturing a hot wire protection pipe and a power connection part and a hot wire pulling jig formed of the same material and length as the inner tube; Wow,

Step S3: A plurality of centerings, which are gap maintaining devices, are installed on the outside of the inner pipe and the heat wire protection pipe, Thermal conductivity foamed by adding 5 to 30 mole% of foaming agent CFC-11 0.0182W/Mk to 0.0256W/Mk A step of uniformly filling the rigid polyurethane foam insulation between the inside and outside; Wow,

Step S4: the heating wire is inserted into the plurality of heating wire protection pipes, the heating wire pulling jig is pulled to move the heating wire to the same length as the plurality of heating wire protection pipes, and the heating wire is integrally installed without a joint; Wow,

Step S5: The power connection part of the heating wire is connected to the power switch of the control box, and +, - power is supplied or cut off, and heat is generated or not generated in the +, - power heating wire of the heating wire, and the temperature is controlled by the temperature controller. ' to; By the 'installation method of a double insulation pipe provided with a pipe for protection against freezing heat rays' of the present invention, configured; Try to solve the above problems.

By the "double insulation pipe provided with a pipe for protection against freezing heat rays and its installation method" of the present invention;

To solve the problems of the prior art and,

In particular, the effect of preventing damage to the heating wire due to expansion and heat caused by polyol and MDI (Methylene Diphenyl Diisocyanate), which are the raw materials of the insulator, makes it easy to connect the heating wire to each of the double insulation tubes;

Effect of providing convenience and safety of hot wire by assembling the hot wire at once using a hot wire pulling jig without a joint of the hot wire using a hot wire pulling jig;

The effect of further shortening the construction cost and construction period because on-site thermal insulation work is unnecessary;

Since there is little heat loss, maintenance costs (operating costs) are reduced, and regular replacement and repair of insulating materials are unnecessary;

It is a double insulation tube provided with a heat wire protection pipe integrally provided outside the inner tube of the double insulation tube. Contrary to the connection method, the construction period and cost are significantly reduced;

The sealing power is strengthened and moisture, air, and bacteria are completely blocked from the outside, so the life of the double insulation tube is extended, the thermal insulation effect is improved, the inner tube corrosion caused by static electricity in the ground and underwater is prevented, and the temperature, pressure, and fluid types The range of use is wide, so steam and cold. effects applicable to hot water, condensate, and other chemicals;

Durability, heat preservation and insulation performance of the double insulation tube are strengthened, temperature control is easy, and heat supply is maximized; It is a very useful invention.

1 is a cross-sectional view of a conventional double insulation tube;
2 and 3 are reference views of a double insulation tube equipped with a pipe for protection against freeze-drying heat rays of the present invention;
4 and 5 are reference views showing an embodiment in which a centering is installed in a double thermal insulation pipe equipped with a pipe for protection against freeze-drying heat rays according to the present invention;
6 is a FLOW-SHEET showing a step-by-step installation method of a double insulation tube equipped with a pipe for protection against freeze-drying heat rays of the present invention;
7 and 8 are official test reports of the double thermal insulation pipe equipped with the present invention freeze-resistant heat ray protection pipe.

Hereinafter, with reference to the accompanying drawings, it will be described in detail with respect to the "double thermal insulation pipe equipped with a pipe for protection against freezing heat ray and its installation method" of the present invention;

In addition, The composition of the double thermal insulation pipe provided with a pipe for protection against freeze-drying heat rays constituting the present invention and its installation method;

As clearly stated in the "Examples and test results of the Korea Construction Living Environment Testing Laboratory (KCL) test report, which is an authorized institution," of the present invention (refer to FIGS. 7 and 8):

' Solving the problems of the prior art and

In particular, damage to the heating wire occurs due to expansion and heat caused by polyol and MDI (Methylene Diphenyl Diisocyanate), which are raw materials for insulation, inconvenient work to connect the heating wire to each of the plurality of double insulation tubes, and overheating or disconnection of the heating wire joint At the same time the problem is solved,

It is easy to install when constructing a hot wire and piping, so workability is further improved, and the convenience of assembling a hot wire at once without a joint of the hot wire using a hot wire pulling jig and the safety of the hot wire are given.

Construction cost and construction period are further shortened as on-site warming work is unnecessary.

Since there is little heat loss, maintenance costs (operating costs) are reduced, and regular replacement and repair of insulating materials are unnecessary.

It is a double insulation tube provided with a heat wire protection pipe integrally provided outside the inner tube of the double insulation tube. Unlike the connection method, the construction period and cost are reduced,

The sealing power is strengthened and moisture, air, and bacteria are completely blocked from the outside, so the life of the double insulation tube is extended, the thermal insulation effect is improved, the inner tube corrosion caused by static electricity in the ground and underwater is prevented, and the temperature, pressure, and fluid types The range of use is wide, so steam and cold. It can be applied to hot water, condensed water, and other chemicals.

Durability, heat preservation and insulation performance of the double insulation tube are strengthened, temperature control is easy, and heat supply is maximized;

Clarifying that it consists of "a double insulation tube equipped with a pipe for protection against freeze-drying heat rays of an appropriate configuration and an installation method thereof";

In addition, the numerical values mentioned in the double thermal insulation pipe provided with the freeze protection pipe for heat ray protection of the present invention and the installation method thereof are not merely limited as numerical values, but the inventive step mentioned above is provided by the present applicant through a lot of time and effort. Clarify that it consists of the appropriate constituents and their values;

The embodiment mentioned below is one preferred embodiment, and the present invention is not limited by one embodiment, but 'double thermal insulation tube and installation method with a pipe for protection against freezing heat rays' composed of the technical idea of the same category. makes it clear that this right is included.

2 and 3 are reference views of a double insulation tube equipped with a pipe for protection against freeze-drying heat rays of the present invention,

4 and 5 are reference views showing an embodiment in which the centering is installed in the double thermal insulation pipe provided with the present invention freeze-resistant heat ray protection pipe,

6 is a FLOW-SHEET showing step by step the installation method of the double thermal insulation pipe equipped with the present invention for freeze protection heat ray protection pipe,

7 and 8 are official test results of the double thermal insulation pipe equipped with the present invention for freeze protection heat ray protection pipe.

As shown in Figures 2 to 3; (See Figures 4 and 5)

In order to prevent freezing of the double insulation tube supplied to each area including apartment complexes, commercial buildings, industrial and residential areas through the Water Resources Corporation or the water supply system and cogeneration supply system, the inside of the double insulation tube In order to prevent damage to the heating wire installed in the heating wire and to solve the problem of the heating wire joint and the efficiency of the operation of connecting the heating wire to the double insulation tube, the 'double insulation tube 100 provided with a pipe for protection against freezing of the heat wire 100' of the present invention is;

1) a double insulation tube body (10) composed of an inner tube (11) and an outer tube (12);

2) a pipe 20 for heat ray protection provided on the outside of the inner tube 11;

3) The +, - power supply heating wire having a power connection part 31 to which + and - power is supplied and a heating wire pulling jig 32 formed on one side for moving the heating wire provided inside the heating wire protection pipe 20 (30', 30") consisting of a heating wire 30 and;

4) The distance between the inner and outer tubes 11 and 12, which is provided on the outside of the inner tube 11 and the heat ray protection pipe 20, is kept constant, so that the insulating material 50 between the inner and outer tubes 11 and 12. A plurality of centering rings 40 are uniformly filled; and (see FIGS. 4 and 5)

5) Injected and filled between the inner and outer surfaces 11 and 12, the thermal conductivity of 0.0182W/Mk to 0.0256W/Mk low thermal conductivity A rigid polyurethane foam (Rigid Polyurethane Foam) insulator (50) and;

6) to the control box 60 for supplying power and temperature control of the heating wire 30, connected to the power connection part 31 of the heating wire 30; is composed

The double thermal insulation tube body 10;

It is composed of an inner tube 11 including a steel tube, copper tube, stainless tube, aluminum (AL) tube, or synthetic resin tube, and an outer tube 12 made of polyethylene or polypropylene.

In addition, when the inner tube is configured with a plurality of inner and outer tubes to extend the length of the double thermal insulation tube, the joint portion 11 ′ and 12 ′ of the inner tube 11 and the outer tube 12 are welded to each other. (10). (A plurality of inner pipe joints 11' are welded to each other, and a plurality of external joint parts 12' are welded to each other).

The heat ray protection pipe 20;

Including a steel pipe or a copper pipe or a stainless pipe or an aluminum (AL) pipe or a synthetic resin pipe of the same length and the same material as the inner pipe, provided on the outside of the inner pipe 11 It is composed of a heat wire protection pipe 20, and + and - power is supplied to the inside of the heat wire protection pipe 20 by +, - power heating wire (30', 30") to generate heat. It is composed of a pipe 20 for heat ray protection.

In addition, when configured with a plurality of inner and outer tubes for extending the length of the double insulation tube, the joint 20' of the plurality of heat ray protection pipes 20 is welded to each other. .(The joint 20' of the pipe 20 for heat ray protection is welded to each other)

The heating wire 30 is;

A power connection part 31 to which + and - power is supplied, provided inside the pipe for protecting the heating wire 20, and a heating wire pulling jig 32 connected by winding an iron wire on one side of the heating wire 30 for moving the heating wire is formed (refer to FIGS. 3 and 5), and the power connection part 31 to which +, - power is supplied is connected to the inside of the power switch 61 of the control box 60, and the power is supplied by the ON operation of the power switch 61. Power is supplied to the connection part 31, and the heat generated from the + and - power heating wires 30', 30" is transferred to the interior and exterior surfaces 11 and 12,

The heating wire 30 composed of the + and - power heating wires (30', 30") provided inside the heating wire protection pipe 20 is configured to be movable by the heating wire pulling jig 32, and a plurality of heating wire protection pipes (20) is moved to the same length as the length of the plurality of heat ray protection pipes 20 in the interior, so that the hot wire 30 is provided inside the plurality of heat ray protection pipes 20 integrally without the need for a separate connection part It is composed of a heating wire 30 of the configuration.

Accordingly, the heating wire protection pipe 20 of the present invention and the heating wire 30 provided in the heating wire protection pipe 20 are;

Damage to the heating wire due to expansion and heat caused by polyol and MDI (Methylene Diphenyl Diisocyanate), the raw materials of the prior art insulation material, the inconvenience of connecting the heating wire to each of the double insulation tubes, and the problem of the hot wire joint have been solved,

In particular, the construction is easy, so workability is improved, and the distance can be moved by the hot wire pulling jig 32 . By moving in length, the heating wire 30 is integrally provided inside the plurality of heating wire protection pipes 20 without the need for a separate connection part, so that the construction convenience and safety of the heating wire are assembling the heating wire at once without a joint of the heating wire is granted;

It is easy to install during pipe construction, and the on-site warming work is unnecessary, which further shortens the construction cost and construction period;

Since there is little heat loss, the maintenance cost (operating cost) is reduced, regular replacement and repair of the insulating material is unnecessary, and the heating wire provided inside the heating wire protection pipe 20 and the heating wire protection pipe 20 has a technical configuration that maximizes heat supply. It consists of (30).

As shown in Figures 4 and 5,

The centering 40 is;

The body 41 of a synthetic resin material including polyethylene or polypropylene, provided on the outside of the inner tube 11 and the heat ray protection pipe 20, and the inner and outer surfaces 11 and 12 on the outside of the main body 41 ) consists of a centering (40) provided with a plurality of spacing retaining tools (42) protruding to the outside to a height corresponding to the distance between the inner and outer surfaces (11, 12) so that the interval is kept constant;

The distance between the inner and outer tubes 11 and 12, which is the double insulation tube body 10, is kept constant, so that the heat insulating material 50 is uniformly filled between the inner and outer tubes 11 and 12, so that the double insulation tube of the present invention is Durability, thermal insulation, insulation performance, and air-tightness performance are further strengthened, and the technical composition of the insulation filling operation is easy, and the flow of the inner tube 11 and the heat ray protection pipe 20 is prevented, so the installation workability is further improved. , the centering 40).

The heat insulating material 50 is;

By the centering 40 of the present invention, the distance between the inner and outer tubes 11 and 12, which is the double insulation tube body 10, is kept constant, and the injected and filled trichlorofluorine between the inner and outer tubes 11 and 12 The small pore distribution rigid polyurethane foam foamed with 5 to 30 mole% of CFC-11, a romethane foaming agent, has a thermal conductivity of 0.0182W/Mk to 0.0256W/Mk. Consists of a thermal insulation material 50, which is a rigid polyurethane foam (Rigid Polyurethane Foam) with low thermal conductivity;

- Pore distribution with 18 mole% of foaming agent CFC-11 added

Due to the centering 40 provided on the outside of the inner tube 11 and the heat ray protection pipe 20, the distance between the inner and outer tubes 11 and 12, which is the double thermal insulation tube body 10, is maintained at a constant level. The insulating material 50 is uniformly filled between (11, 12), workability is remarkably improved, and at the same time, the insulation and watertight performance of the double thermal insulation tube 100 of the present invention are strengthened,

Sealing caps are sealed at both ends of the inner and outer tubes with cylinders, and insulating material is injected and filled between the inner and outer tubes 11 and 12,

The insulation uses Rigid Polyurethane Foam with a thermal conductivity of 0.0182W/Mk to 0.0256W/Mk, which has the lowest thermal conductivity among the existing insulators, as an insulator, so it has better thermal insulation properties (temperature drop when transporting warm water at 120℃ for 40km) is less than 1 ℃), and the durability and heat retention of the double insulation tube is also reinforced with a technical configuration, and is composed of a heat insulating material (50).

The control box 60 is;

It is connected to the power connection part 31 of the heating wire 30, and +, - power is supplied or cut off to the power connection part 31 by the ON and OFF operation of the power switch 61, and the +, - power heating wire 30' , 30") with a power switch 61 that generates or does not generate heat,

It is composed of a control box (60) provided with a temperature controller (62) for temperature control of the heating wire on the outside of the power switch (61);

It is composed of a control box (60) of a technical configuration that is easy to control the temperature of the heating wire.

Therefore, the 'double insulation tube 100 provided with a pipe for protection against freezing heat rays of the present invention is;

In particular, in a configuration in which a heating wire is installed inside the heat wire protection pipe of the present invention, the heat wire is damaged due to expansion and heat caused by polyol and MDI (Methylene Diphenyl Diisocyanate), which are raw materials for insulation in the prior art, and a plurality of double insulation At the same time, it is a technical configuration that solves the problem of overheating or disconnection of the hot wire joint and the inconvenience of connecting the hot wire to each tube.

A technical configuration that is easy to install when constructing a hot wire and pipe, further improving workability, and provides the convenience of construction and safety of the hot wire in which the hot wire is installed at once without a joint of the hot wire using a hot wire pulling jig;

A technical composition that further shortens the construction cost and construction period by eliminating the need for on-site thermal insulation work;

A technical configuration that reduces the maintenance cost (operating cost) as there is little heat loss, and does not require regular replacement and repair of insulating materials;

In addition, it is manufactured and supplied at the manufacturing plant as a double insulation tube equipped with a heat wire protection pipe integrally provided with a heat wire outside the inner tube of the double insulation tube, so construction is easier,

Unlike the method of connecting a plurality of heating wires to a plurality of double insulation tubes in the prior art by means of a connection part, the heating wire can be installed inside the heating wire protection pipe at once without a joint. The construction period and cost are significantly reduced, and the technical composition enables perfect thermal insulation work;

The sealing force of the double insulation tube is further strengthened by the configuration of the inner and outer tube body of the present invention, the pipe for protecting the inner and outer tube, centering, and insulation material, moisture, air, and bacteria are completely blocked from the outside, thereby extending the life of the double insulation tube The thermal insulation effect is improved, the internal pipe corrosion caused by static electricity in the ground and underwater is prevented, and the temperature, pressure, and the range of fluid types are wide. It can be applied to the transfer of air and fluid including hot water, condensed water, and chemicals.

The distance between the inner and outer tubes 11 and 12, which is the double insulation tube body 10, is kept constant, so that the insulating material 50 is uniformly filled between the inner and outer tubes 11 and 12, and the workability is significantly improved. , The insulation and watertight performance of the double thermal insulation tube 100 of the present invention are strengthened,

It uses Rigid Polyurethane Foam with a thermal conductivity of 0.0182W/Mk to 0.0256W/Mk, which has the lowest thermal conductivity among existing thermal insulation materials, and has superior thermal insulation properties (When transporting warm water at 120℃ for 40km, the temperature drop is 1 ℃), and the durability and heat retention of the double insulation tube are also strengthened;

A technical configuration that is installed integrally without a joint of the heating wire according to the length of the double insulator, maximizes the safety of heat supply and heat supply through the stable supply of electricity, and facilitates temperature control of the heating wire;

A technical configuration that enables freely interchangeable production regardless of the material and standard of the inner tube, insulation, and exterior;

Technical composition that can produce compatible insulation regardless of thickness; It is composed of a 'double insulation tube equipped with a pipe for protection against freezing heat rays'.

Also, as needed;

The antifreeze heating wire of the present invention in which the joint portions 11', 12', 20' of the inner tube 11 or the outer tube 12 or the heat wire protection pipe 20 of a plurality of configurations for extending the length of the double insulation tube are respectively welded Double insulated tube with protective pipe:

The inner tube 11 or the outer tube 12 or the joint portions 11', 12', 20' of the pipe 20 for heat ray protection of a plurality of configurations are connected by a pipe fitting including a reducer or a socket. It may be composed of a non-welding configuration, a 'double insulation tube equipped with a pipe for protection against freezing heat rays';

The inner tube 11 or the outer tube 12 of the plurality of configurations or the joint portions 11', 12', and 20' of the pipe 20 for heat ray protection are provided with an 'L'-shaped flared flared surface; It may be composed of exterior (11, 12) or heat ray protection pipe (20);

On the outside of the 'L'-shaped flared inner tube 11 or the outer tube 12 or the heat ray protection pipe 20 provided with a flared surface, a body provided with a plurality of bolt fastening holes, and a gasket inside the main body It may be composed of a 'double insulation tube equipped with a pipe for protection against freezing heat rays' of a non-welding configuration connected by a provided flange;

The inner and outer tubes 11 and 12 and the heating wire protection pipe 20, the heating wire 30, the heat insulating material 50, the control box 60 of the configuration in which the centering 40 of the present invention is excluded. It may also be composed of a 'double insulation tube equipped with a pipe for protection against freezing heat rays'.

In addition, a resin coating layer coated with polyethylene resin is provided on the surface of the inner tube 11 and the heat ray protection pipe 20, so that the abrasion resistance of the inner tube 11 and the heat ray protection pipe 20 is enhanced. It may consist of a 'double insulation tube equipped with a pipe for preventing heat ray protection,'

The resin coating layer coated on the surface of the inner tube 11 and the heat ray protection pipe 20 is,

Based on 100% by weight of the composite polyethylene resin,

High-density polyethylene 50 to 60% by weight, linear low-density polyethylene 35 to 40% by weight, low-density polyethylene 5 to 10% by weight is composed of a composite polyethylene resin with an average density of 0.921 to 0.955 g / ㎤ range, a resin coating layer with enhanced abrasion resistance It is preferably composed of

Hereinafter, with respect to the 'installation method of the double thermal insulation pipe provided with a pipe for protection against freezing heat rays' of the present invention, it will be described.

As shown in Figure 6;

In order to prevent freezing of the double insulation tube supplied to each area including apartment complexes, commercial buildings, industrial and residential areas through the Water Resources Corporation or the water supply system and cogeneration supply system, the inside of the double insulation tube In order to prevent damage to the heating wire installed in the and to solve the efficiency of the work of connecting the heating wire to the double insulation tube and the problem of the hot wire joint, the installation method of the 'double insulation tube 100 provided with a pipe for protection against freezing of the heat wire 100 of the present invention 'Silver; (including manufacturing method)

It consists of the following steps S1 to S5. (Product configuration diagram and installation state diagram: refer to FIGS. 2 to 5)

Step S1: Manufacturing the inner tube and outer tube, which is a double insulation tube, and welding the joints of the plurality of inner and outer tubes, respectively.

(Manufacture of an inner tube 11 including a steel tube, copper tube, stainless tube, aluminum (AL) tube, or synthetic resin tube, which is a double insulation tube, and an outer tube 12 made of polyethylene or polypropylene, and

When configured with a plurality of inner and outer tubes to extend the length of the double insulated tube, the double insulated tube in which the joints 11' and 12' of the inner tube 11 and the outer 12 are respectively welded ( 10) is manufactured.)

Step S2: A step in which a heating wire protection pipe of the same material and length as the inner tube, a power connection part, and a heating wire having a heating wire pulling jig are manufactured

(prepared in step S1 above) Manufactures a pipe 20 for heat ray protection including a steel pipe, copper pipe, stainless pipe, aluminum (AL) pipe, or synthetic resin pipe of the same material and length as the inner pipe, and consists of a plurality of inner and outer pipes to extend the length of the double insulation pipe At the time, a pipe 20 for heat ray protection of a configuration in which a plurality of joints 20 ′ of a plurality of pipes 20 for heat ray protection are welded to each other is manufactured,

+, - power supply hot wire (30', 30"), in which +, - power is supplied to the other side of the hot wire, the power connection part 31, and the hot wire pulling jig 32 is formed on one side of the hot wire for moving the hot wire The configured heating wire 30 is manufactured.)

Step S3:

A plurality of centerings, which are gap maintaining devices, are installed on the outside of the inner tube and the heat ray protection pipe, and 5 to 30 mole% of CFC-11 foaming agent is added to form a foamed rigid polyurethane foam insulation material with a thermal conductivity of 0.0182W/Mk to 0.0256W/Mk. Step of uniformly filling between the exterior surfaces

(On the outside of the inner tube 11 and the heat ray protection pipe 20, on the outside of the circular-shaped main body 41 and the main body 41, the inner and outer appearance ( A plurality of centering rings 40 provided with a plurality of spacing retainers 42 protruding to the outside to a height corresponding to the spacing of 11 and 12 are installed, and sealing caps are provided at both ends of the inner and outer surfaces (11, 12). It is sealed with this cylinder, and 5 to 30 mole% of CFC-11, a trichlorofluoromethane foaming agent, is added and foamed with a small pore distribution rigid polyurethane foam with thermal conductivity of 0.0182W/Mk to 0.0256W/Mk. The rigid polyurethane foam insulation 50 with low thermal conductivity is filled.)

Step S4:

A step in which a heating wire is inserted into the plurality of heating wire protection pipes, the heating wire pulling jig is pulled to move the heating wire to a length equal to the length of the plurality of heating wire protection pipes, and the heating wire is integrally installed without a joint part

(As a step in which a heating wire is inserted and installed inside the plurality of heating wire protection pipes 20 manufactured in step S2, the plurality of heating wire protection pipes 20 by pulling the heating wire pulling jig 32 provided on one side of the heating wire Since the heating wire 30 is moved to the same length as the length of the plurality of heat wire protection pipes 20 inside, the heat wire 30 is integrated into the plurality of heat wire protection pipes 20 by one movement without a separate joint. installed as)

Step S5:

When the power connection part of the heating wire is connected to the power switch of the control box and +, - power is supplied or cut off, heat is generated or not generated in the +, - power heating wire of the heating wire, and the temperature is controlled by the temperature controller.

(The power connection part 31 of the heating wire 30 installed in step S4 is connected to the power switch 61 of the control box 60, and +, − power is supplied to the power connection part 31 by ON, OFF operation or It is cut off, and heat is generated or not generated in the +, - power heating wires (30', 30"), and the temperature is controlled by the temperature controller 62 of the control box 60.)

Therefore, the installation method of the 'double thermal insulation pipe 100 provided with a pipe for protection against freezing heat rays of the present invention;

In particular, in a configuration in which a heating wire is installed inside the heat wire protection pipe of the present invention, the heat wire is damaged due to expansion and heat caused by polyol and MDI (Methylene Diphenyl Diisocyanate), which are raw materials for insulation in the prior art, and a plurality of double insulation At the same time, it is an installation method of a configuration that solves the inconvenience of connecting the hot wire to each pipe and the problem of overheating or disconnection of the hot wire joint,

In the step S4, the heating wire is inserted and installed inside the plurality of heating wire protection pipes 20 manufactured in the S2 step, and the workability is further improved by easy installation during the heating wire and piping construction, and using a hot wire pulling jig An installation method of a configuration in which the heating wire is installed at once without a joint of the heating wire, and the convenience of construction and the safety of the heating wire are given;

By the steps S1 to S5, the on-site thermal insulation work is unnecessary, so the construction cost and construction period are further shortened, the maintenance cost (operation cost) is reduced because there is little heat loss, and the installation method of the configuration in which regular replacement and repair of the insulating material is unnecessary;

In addition, by the steps S1 to S5, the double insulation tube is provided with a heat wire protection pipe integrally provided on the outside of the inner tube of the double insulation tube, and is manufactured and supplied at the manufacturing factory, so that the installation method of a configuration that is easier to construct;

Unlike the method of connecting a plurality of heating wires to a plurality of double insulation tubes in the prior art by means of a connection part by step S2 and S4, the heating wire can be installed inside the pipe for protecting the heating wire at once without a joint. The construction period and cost are significantly reduced, and the installation method of a configuration that allows perfect thermal insulation work;

The sealing power of the double insulation tube is further strengthened by the installation configuration of the inner and outer tube body of the present invention S1 to S5, as well as the pipe for protection of the heating wire, centering, and heat ray protection, so that moisture, air, and bacteria are completely blocked from the outside for double insulation The service life of the pipe is extended, the thermal insulation effect is improved, the internal pipe corrosion caused by static electricity in underground and underwater is prevented, and the use range of temperature, pressure, and fluid types is wide, so it can be used for steam, cooling. It can be applied to the transfer of air and fluid including hot water, condensed water, and chemicals.

The distance between the inner and outer tubes 11 and 12, which is the double insulation tube body 10, is kept constant, so that the insulating material 50 is uniformly filled between the inner and outer tubes 11 and 12, and the workability is significantly improved. , An installation method of a configuration in which the heat insulation and air-tightness performance of the present invention double insulation tube 100 are enhanced;

It uses Rigid Polyurethane Foam with a thermal conductivity of 0.0182W/Mk to 0.0256W/Mk, which has the lowest thermal conductivity among the existing thermal insulation materials in the S3 stage, as an insulator, so it has better thermal insulation properties (when transporting 120℃ hot water 40km, the temperature The drop is less than 1°C), and the installation method of the double insulation tube has enhanced durability and heat retention;

An installation method of a configuration in which the safety of heat supply and heat supply are maximized by stably supplying electricity and the temperature of the heating wire is easy to control;

According to steps S1 to S5, freely compatible production is possible regardless of the material and standard of the inner tube, insulation, and exterior, and the installation method configuration that allows compatible production regardless of the thickness of insulation; It consists of 'Installation method of double insulation tube equipped with pipe for protection against freezing heat rays'.

Also, as needed;

The inner tube 11 or the outer tube 12 or the joint portions 11', 12', 20' of the pipe 20 for heat ray protection of a plurality of configurations for extending the length of the double insulation tube of steps S1 and S2 are welded, respectively. The installation method of the double insulation tube equipped with the pipe for protection against freezing heat rays of the present invention is:

The inner tube 11 or the outer tube 12 or the joint portions 11', 12', 20' of the pipe 20 for heat ray protection of a plurality of configurations are connected by a pipe fitting including a reducer or a socket. It may be composed of a non-welding configuration, 'Installation method of a double insulation tube equipped with a pipe for protection against freezing heat rays';

The inner tube 11 or the outer tube 12 of the plurality of steps S1 and S2, or the joint portions 11', 12', 20' of the heat ray protection pipe 20 are 'L' shaped flared flaring processing It may consist of a 'installation method of a double insulation tube equipped with a pipe for freeze protection and heat ray protection', which is composed of a surface-equipped inner tube 11 or outer tube 12 or a heat ray protection pipe 20;

On the outside of the 'L'-shaped flared inner tube 11 or the outer tube 12 or the heat ray protection pipe 20 provided with a flared surface, a body provided with a plurality of bolt fastening holes, and a gasket inside the main body It may consist of a 'installation method of a double insulator provided with a pipe for protection against freezing heat rays' of a non-welding configuration connected by a provided flange;

The installation method in which the centering 40 of the step S3 is not installed may be configured as a 'installation method of a double insulation tube equipped with a pipe for protection against freezing heat rays'.

In addition, a resin coating layer coated with polyethylene resin is provided on the surface of the inner tube 11 and the heat ray protection pipe 20 in steps S1 and S2, so that the abrasion resistance of the inner tube 11 and the heat ray protection pipe 20 is strengthened. It may consist of 'Installation method of double insulation tube equipped with pipe for freeze protection heat ray protection',

The resin coating layer coated on the surface of the inner tube 11 and the heat ray protection pipe 20 is,

Based on 100% by weight of the composite polyethylene resin,

High-density polyethylene 50 to 60% by weight, linear low-density polyethylene 35 to 40% by weight, low-density polyethylene 5 to 10% by weight is composed of a composite polyethylene resin with an average density of 0.921 to 0.955 g / ㎤ range, a resin coating layer with enhanced abrasion resistance It is preferably composed of

Like the test results of the Korea Construction Living Environment Testing Institute (KCL), which is an authorized institution in FIGS. 7 and 8;

The 'double thermal insulation pipe provided with a pipe for protection against freezing heat rays and a method for installing the same' of the present invention will be described in more detail with reference to examples.

In an embodiment, a plurality of inner tubes having a stainless tube joint of 200 mm in outer diameter of the present invention are welded, and a plurality of heat ray protection pipes in which joints are welded to the outside of the inner tube, which is a stainless tube, having the same material as the inner tube and a stainless tube having an outer diameter of 10 mm. is laminated, and a plurality of centering rings made of polyethylene, which maintains the distance between the inner tube and the outer tube, are installed on the outside of the inner tube 11 and the heat ray protection pipe 20, and the center ring is installed on the outside of the inner tube and the heat ray protection pipe. After a plurality of exteriors in which a polyethylene joint with an outer diameter of 320 mm is welded is laminated,

After sealing the sealing caps at both ends of the inner and outer pipes and the heat ray protection pipe with a cylinder, the insulation composition containing 18 mole% of CFC-11, a trichlorofluoromethane foaming agent, is added to the hard polyurethane resin through the sealing cap. Insulation material, which is injected and foamed rigid polyurethane foam, is filled between the

A hot wire composed of a power connection part to which + and - power is supplied and a hot wire pulling jig formed on one side for moving the hot wire inside one side of the plurality of heat wire protection pipes is inserted, After the heating wire is moved to the other side of the plurality of heat wire protection pipes by pulling

When the power connection part of the heating wire is connected to the power switch of the control box, + and - power is supplied to the power connection part of the heating wire, and heat is generated in the heating wire ; A double insulation tube equipped with a pipe for protection against freeze-drying heat rays of the present invention was manufactured.

test methods and results of physical properties;

go. Density, Absorption:

It was measured by the test method of EN489, and the results are shown in Table 1.

me. Flexural Test:

It was measured by the test method of KSM ISO 1209-2, and the results are shown in Table 1.

The 10% compressive strength:

It was measured by the test method of KSM ISO 844, and the results are shown in Table 1.

la. Adhesion test (internal and external):

It was measured by the test method of DS 2178, and the results are shown in Table 1.

mind. CLOSED CELL CONTENTS:

It was measured by the test method of KSM ISO 4590, and the results are shown in Table 1.

bar. Thermal Conductivity:

It was measured by the test method of KSL 9016, and the results are shown in Table 1.

buy. Shear strength:

It was measured by the test method of KSM ISO 1922, and the results are shown in Table 1.

Test Items unit baseline Test result density kg/m3 over 60 95/ pass absorption rate % below 10 0.6/ pass flexural strength kPa 300 or more 1,733/ passed 10% compressive strength kPa 300 or more 1,066/ passed Adhesion test (inner tube) kPa 200 or more 734/ Pass Adhesion test (appearance) kPa over 100 366/ pass CLOSED CELL CONTENTS kPa over 88 96.8/ Pass thermal conductivity W/mK 0.0256 or less 0.0234/ pass shear strength kPa 200 or more 543.8/ Pass

As shown in Table 1 above, an embodiment of the present invention is;

In particular, the flexural strength, 10% compressive strength, adhesive strength, and shear strength are far superior to the standard values of insulation materials (flexural strength: 5.78 times, 10% compressive strength: 3.55 times, adhesive strength: 3.66 times, shear strength: 2.72 times) It was found to be more reinforced;

Density, water absorption, closed cell content, and thermal conductivity are far superior to the standard values of insulation (density: 1.58 times, water absorption: 16.6 times, closed cell content: 1.1 times, thermal conductivity: 1.09 times), further strengthening the airtightness, insulation and insulation (Standard value: Korea District Heating Corporation’s standard value for insulation)

oh Product composition and installation workability: (judging by product composition and installation method)

In addition, by the article configuration and installation method in which the heating wire is installed inside the heating wire protection pipe;

In particular, the heat wire due to expansion and heat caused by polyol and MDI, which are the raw materials of the prior art insulation material, is damaged, the inconvenience of connecting the heat wire to each of the plurality of double insulation tubes, and the problem of overheating or disconnection of the hot wire joint are solved,

Since the heating wire is inserted inside the plurality of heating wire protection pipes, it is easy to install during the heating wire and piping construction, and workability is further improved. Convenience of construction in which the heating wire is integrally installed and the safety of the heating wire are given,

It is a double insulation tube equipped with a heat wire protection pipe that is integrally provided with a heating wire outside the inner tube of the double insulation tube.

Unlike the conventional method of connecting a plurality of heating wires to a plurality of double insulation tubes one by one by means of a connection part, the heating wire can be installed inside a plurality of heating wire protection pipes at once without a joint. It has been found that the construction period and cost are significantly reduced, and the composition and installation method of the product are perfect for thermal insulation.

As mentioned above, although the present invention has been described in detail through specific embodiments, the present invention is not limited to the above embodiments, and various modifications are possible by those of ordinary skill within the scope of the technical spirit of the present invention.

100: double insulation tube for freeze protection of the present invention (double insulation tube)
10: double insulation tube tube body (pipe body)
11: Interior 11': Joint
12: exterior 12': joint
20: pipe for heat wire protection 20': joint
30: hot wire
30', 30": +,- Power heating wire
31: power connection part 32: heated wire pull jig
40: centering
41: body 42: gap maintenance tool
50: insulation material
60: control box
61: power switch 62: temperature controller
200 prior art double insulation tube
201: interior 202: exterior
203: heat shrink casing

Claims (10)

In order to prevent damage to the heating wire installed inside the double insulation tube to prevent freezing of the double insulation tube, the efficiency of the work of connecting the heating wire to the double insulation tube, and to solve the problem of the hot wire joint, the inner tube 11 and the outer tube 12 ) of a double thermal insulation tube body 10 and a heat ray protection pipe 20 provided on the outside of the inner tube 11, and +, - power supplied inside the heat ray protection pipe 20 A hot wire 30 composed of a connection part 31 and a hot wire pulling jig 32 connected by winding an iron wire on one side of the hot wire 30 for moving the hot wire (30 ', 30 ") and , a centering 40 provided on the outside of the inner tube 11 and the heat wire protection pipe 20, and a heat insulating material 50 injected and filled between the inner and outer tubes 11 and 12, and the heating wire 30 ) In the double thermal insulation tube provided with a heat wire protection pipe configured as a control box (60) for supplying power and temperature control of the heating wire (30) connected to the power connection part of the (31);

The centering 40,
The body 41 of a circular shape made of a synthetic resin material including polyethylene or polypropylene, and the interval between the inner and outer surfaces 11 and 12 so that the distance between the inner and outer surfaces 11 and 12 is kept constant on the outside of the main body 41 A plurality of spacing retainers 42 protruding to the outside at a height corresponding to ) is composed of a plurality of centering (40) uniformly filled;

The heat insulating material 50,
It is a rigid polyurethane foam with a low thermal conductivity of 0.182W/Mk to 0.0256W/Mk of thermal conductivity by a small pore distribution rigid polyurethane foam foamed by adding 5 to 30 mole% of CFC-11, a trichlorofluoromethane blowing agent. Double insulation tube (100) provided with a pipe for protection against freezing heat ray, characterized in that it is composed of a heat insulating material (50). delete delete delete delete delete delete delete To prevent damage to the heating wire installed inside the double insulation tube to prevent freezing of the double insulation tube, to solve the problem of the heating wire joint and the efficiency of the work of connecting the heating wire to the double insulation tube, step S1: Double insulation tube chain A step of manufacturing the inner tube and the outer tube and welding the joints of the inner and outer tubes of a plurality of configurations, step S2: manufacturing a hot wire with the same material and the same length as the inner tube, a power connection part, and a hot wire formed with a hot wire pulling jig; , step S4: a step in which a heating wire is inserted into the plurality of heating wire protection pipes, the heating wire pulling jig of the heating wire is pulled to move the heating wire to the same length as the length of the plurality of heating wire protection pipes, and the heating wire is integrally installed without a joint part Wow, Step S5: The power connection part of the heating wire is connected to the power switch of the control box, and +, - power is supplied or cut off, and heat is generated or not generated in the +, - power heating wire of the heating wire, and the temperature is controlled by the temperature controller. ; In the method of installing a double insulation tube provided with a pipe for protection against freeze-drying, configured as;

As a step after step S2 and a step before step S4,
Step S3: On the outside of the inner tube and the heat ray protection pipe, a plurality of centerings, which are gap maintaining devices, are installed, and 5 to 30 mole% of the foaming agent CFC-11 is added, and the foamed rigid polyurethane foam insulation material with a thermal conductivity of 0.0182W/Mk to 0.0256W/Mk. A step of uniformly filling between the interior and exterior; The installation method of the double thermal insulation tube (100) provided with a pipe for protection against freezing heat ray, characterized in that it is composed of: delete

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