WO2010137797A1 - Heating pipe - Google Patents

Heating pipe Download PDF

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Publication number
WO2010137797A1
WO2010137797A1 PCT/KR2010/002150 KR2010002150W WO2010137797A1 WO 2010137797 A1 WO2010137797 A1 WO 2010137797A1 KR 2010002150 W KR2010002150 W KR 2010002150W WO 2010137797 A1 WO2010137797 A1 WO 2010137797A1
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WO
WIPO (PCT)
Prior art keywords
heating
pipe
insulator
pipe unit
conductors
Prior art date
Application number
PCT/KR2010/002150
Other languages
French (fr)
Inventor
Dong Wook Kim
Original Assignee
Ls Cable Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ls Cable Ltd. filed Critical Ls Cable Ltd.
Publication of WO2010137797A1 publication Critical patent/WO2010137797A1/en

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/54—Heating elements having the shape of rods or tubes flexible
    • H05B3/56—Heating cables
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
    • F16L53/30—Heating of pipes or pipe systems
    • F16L53/35—Ohmic-resistance heating
    • F16L53/38—Ohmic-resistance heating using elongate electric heating elements, e.g. wires or ribbons

Definitions

  • This disclosure relates to a heating pipe, and more particularly, to a heating pipe in which a heating structure capable of uniformly heating the entire surface of a pipe unit is integrally applied to the pipe unit.
  • a liquid or gas (hereinafter, referred to as a "fluid") flowing along a pipe is sometimes required to be maintained within a proper temperature level.
  • a method for heating surroundings of a pipe to increase a temperature of the pipe such that a fluid flowing along the pipe receives the heat to keep a proper temperature.
  • FIG. 1 is a schematic view showing a heating pipe having an existing heating device.
  • the heating device 1 has a heating cable 5.
  • the heating cable 5 winds the periphery of the pipe unit 3 with a slant. If an electric current is applied to the heating cable 5, an electric resistance heat is generated at the heating cable 5, thereby heating the pipe unit 3.
  • This disclosure is to solve the above problems, and therefore this disclosure provides a heating pipe in which a heating structure capable of uniformly heating the entire surface of a pipe unit is integrally applied to the pipe unit.
  • a heating pipe which includes a pipe unit; an insulator formed in a length direction of the pipe unit while surrounding a surface of the pipe unit; a plurality of conductors formed in the length direction of the pipe unit along a periphery of the insulator and arranged with gaps therebetween; and a heating material formed in a length direction of the insulator while surrounding a surface of the insulator, wherein the conductors are buried in the heating material.
  • the heating pipe may further include a peeled groove formed to expose a surface of the pipe unit; and a connector formed at the peeled groove and electrically connected to the conductors, wherein the connector may be electrically connected to a connector of an adjacent heating pipe.
  • the connector may be electrically connected to the connector of the adjacent heating pipe through a connection cable.
  • a protective sheath may be formed on an outer periphery of the heating material.
  • the gap between the conductors arranged along a periphery of the insulator may be set to satisfy the following equation: Gap between Conductors (L) oc (Temperature (T)-Area of Insulator (S)) / (Square of Intensity of Current (i 2 )-Specific Resistance (p)).
  • the entire surface of the pipe unit is uniformly heated. Also, since the heating structure is integrally formed with the pipe unit, there is no need to separately apply the heating structure to the heating unit, and also an installation cost is reduced.
  • FIG. 1 is a schematic view showing a heating pipe having an existing heating device
  • FIG. 2 is a plan view showing that two heating pipes according to one embodiment are connected with each other;
  • FIG. 3 is a sectional view taken along the line A-A of Fig. 2;
  • Fig. 4 is a sectional view taken along the line B-B of Fig. 2;
  • FIG. 5 is a sectional view showing another heating pipe according to another embodiment. Best Mode for Carrying out the Invention
  • FIG. 2 is a plan view showing that two heating pipes according to one embodiment are connected with each other.
  • Fig. 3 is a sectional view taken along the line A-A of Fig. 2.
  • Fig. 4 is a sectional view taken along the line B-B of Fig. 2.
  • a heating pipe 10 of this embodiment includes a pipe unit
  • an insulator 14 surrounding a periphery of the pipe unit 12, and a heating material 18 having a conductor 16 buried therein and surrounding a periphery of the insulator 14.
  • the insulator 14 is formed in a length direction of the pipe unit 12 while surrounding the periphery of the pipe unit 12 by means of extrusion or coating. This insulator 14 makes the pipe unit 12 not be electrically connected to the conductor 16.
  • the heating material 18 is formed in a length direction of the pipe unit 12 while surrounding the periphery of the insulator 14 by means of extrusion or coating.
  • at least one conductor 16 is provided along the periphery of the insulator 14, and the conductor 16 is arranged in a length direction of the insulator 14 and buried in the heating material 18 while the heating material 18 is extruded or coated.
  • Fig. 3 depicts that the conductors 16 are arranged up, down, right and left, but it is just an example for illustration, and the arrangement of the conductors 16 is not limited thereto.
  • the number or locations of conductors 16 may be suitably adjusted depending on various factors such as a caliber of the pipe unit 12 and the (heat transfer) performance of the heating material 18.
  • a gap between the arranged conductors 16 serves as a resist R, and a relation between the resistor R and the heat formed between the gaps of the conductors 16 is Calorie (Q) oc (Square of the intensity of current (i 2 ) Resistance (R)).
  • a terminal connector 22 electrically connected to the buried conductor 16 is connected to one end of the heating pipe 10 of this embodiment.
  • the terminal connector 22 is electrically connected to a power supply 24.
  • a peeled groove S is formed at one end of each heating pipe 10 to expose a part of the surface of the pipe unit 12.
  • the connector 20 is fixed at the peeled groove S.
  • the conductor 16 buried in the heating pipe 10 is connected to one side of the connector 20, and a connection cable C having an electric connection function is connected to adjacent connectors 20.
  • Fig. 2 illustrates that the connector 20 is formed at one end of each heating pipe 10, and the terminal connector 22 is connected the other end thereof. But, it is just an example and this disclosure is not limited thereto. In other words, connectors 20 may be formed at both ends of the heating pipe 10, and such a heating pipe 10 may be connected between other heating pipes 10 such that three or more heating pipes 10 may be arranged and connected in a length direction.
  • the heating pipes 10 of this embodiment may be easily electrically connected with each other.
  • connection portion of the connectors 20 of adjacent heating pipes 10 is exposed.
  • an insulating protective tube 26 is formed at the connection portion so as to protect the electric connection portion. The insulating protective tube 26 allows the connector 20, the conductor 16 and the connection cable C not to be exposed.
  • insulating protective tube 26 is selected in this embodiment. But, it is just an example and this disclosure is not limited thereto. For example, an insulating tape may be wound thereon instead of the insulating protective tube 26.
  • Fig. 5 is a sectional view showing a heating pipe according to another embodiment disclosed herein.
  • a protective sheath 28 may be further provided around the heating pipe 10, namely on an outer periphery of the heating material 18, according to the usage of the heating pipe 10.
  • Other components 12, 14, 16, 18 of the heating pipe of this embodiment are substantially identical to those of the former embodiment, so they are not explained in detail again.
  • the heating pipe disclosed herein may be applied in case it is required to apply a uniform and proper temperature to a fluid flowing along a pipe.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pipe Accessories (AREA)
  • Resistance Heating (AREA)

Abstract

A heating pipe is configured such that a heating structure capable of uniformly heating the entire surface of a pipe unit is integrally applied to the pipe unit. The heating pipe includes a pipe unit, an insulator formed in a length direction of the pipe unit while surrounding a surface of the pipe unit, a plurality of conductors formed in the length direction of the pipe unit along a periphery of the insulator and arranged with gaps therebetween, and a heating material formed in a length direction of the insulator while surrounding a surface of the insulator, wherein the conductors are buried in the heating material.

Description

HEATING PIPE
This disclosure relates to a heating pipe, and more particularly, to a heating pipe in which a heating structure capable of uniformly heating the entire surface of a pipe unit is integrally applied to the pipe unit.
A liquid or gas (hereinafter, referred to as a "fluid") flowing along a pipe is sometimes required to be maintained within a proper temperature level. For this purpose, there is provided a method for heating surroundings of a pipe to increase a temperature of the pipe such that a fluid flowing along the pipe receives the heat to keep a proper temperature.
Fig. 1 is a schematic view showing a heating pipe having an existing heating device.
As shown in Fig. 1, the heating device 1 has a heating cable 5. In order to apply the heating device 1 to a pipe unit 3, the heating cable 5 winds the periphery of the pipe unit 3 with a slant. If an electric current is applied to the heating cable 5, an electric resistance heat is generated at the heating cable 5, thereby heating the pipe unit 3.
However, in case the heating cable 5 winds the periphery of the pipe unit 3 with a slant to heat the pipe unit 3 as mentioned above, only a portion of the pipe unit 3 contacting with the heating cable 5 is heated, and the other portions not contacting with the heating cable 5 are relatively less heated in comparison to the portions contacting with the heating cable 5. Thus, there is caused a temperature difference between the portion of the pipe unit 3 contacting with the heating cable 5 and the portion not contacting with the heating cable 5.
Also, if the pipe unit 3 is locally heated, in case a fluid flows along the pipe unit 3 at a low speed, local heating and cooling of the fluid is repeated, which may change the characteristics of the fluid.
Meanwhile, in order to heat the pipe unit 3 using the above structure, it is required to wind the heating cable 5 along a length direction of the pipe unit 3. Thus, if the pipe unit 3 is long, the winding work is so cumbersome. In addition, the winding work consumes more time, and thus an installation cost of the equipment is increased.
This disclosure is to solve the above problems, and therefore this disclosure provides a heating pipe in which a heating structure capable of uniformly heating the entire surface of a pipe unit is integrally applied to the pipe unit.
In one aspect, there is provided a heating pipe, which includes a pipe unit; an insulator formed in a length direction of the pipe unit while surrounding a surface of the pipe unit; a plurality of conductors formed in the length direction of the pipe unit along a periphery of the insulator and arranged with gaps therebetween; and a heating material formed in a length direction of the insulator while surrounding a surface of the insulator, wherein the conductors are buried in the heating material.
The heating pipe may further include a peeled groove formed to expose a surface of the pipe unit; and a connector formed at the peeled groove and electrically connected to the conductors, wherein the connector may be electrically connected to a connector of an adjacent heating pipe.
The connector may be electrically connected to the connector of the adjacent heating pipe through a connection cable.
A protective sheath may be formed on an outer periphery of the heating material.
The gap between the conductors arranged along a periphery of the insulator may be set to satisfy the following equation: Gap between Conductors (L) ∝ (Temperature (T)·Area of Insulator (S)) / (Square of Intensity of Current (i²)·Specific Resistance (ρ)).
According to the above disclosure, the entire surface of the pipe unit is uniformly heated. Also, since the heating structure is integrally formed with the pipe unit, there is no need to separately apply the heating structure to the heating unit, and also an installation cost is reduced.
Further, in case a connector is provided, an electric connection between heating pipes may be more easily made.
The above and other aspects, features and advantages of the disclosed exemplary embodiments will be more apparent from the following detailed description taken in conjunction with the accompanying drawings in which:
Fig. 1 is a schematic view showing a heating pipe having an existing heating device;
Fig. 2 is a plan view showing that two heating pipes according to one embodiment are connected with each other;
Fig. 3 is a sectional view taken along the line A-A of Fig. 2;
Fig. 4 is a sectional view taken along the line B-B of Fig. 2; and
Fig. 5 is a sectional view showing another heating pipe according to another embodiment.
Exemplary embodiments now will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. This disclosure may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth therein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art. In the description, details of well-known features and techniques may be omitted to avoid unnecessarily obscuring the presented embodiments.
Fig. 2 is a plan view showing that two heating pipes according to one embodiment are connected with each other. Fig. 3 is a sectional view taken along the line A-A of Fig. 2. Fig. 4 is a sectional view taken along the line B-B of Fig. 2.
As shown in Figs. 2 and 3, a heating pipe 10 of this embodiment includes a pipe unit 12, an insulator 14 surrounding a periphery of the pipe unit 12, and a heating material 18 having a conductor 16 buried therein and surrounding a periphery of the insulator 14.
Hereinafter, the heating pipe 10 configured as above is explained in more detail.
The insulator 14 is formed in a length direction of the pipe unit 12 while surrounding the periphery of the pipe unit 12 by means of extrusion or coating. This insulator 14 makes the pipe unit 12 not be electrically connected to the conductor 16.
On the periphery of the insulator 14, the heating material 18 is formed in a length direction of the pipe unit 12 while surrounding the periphery of the insulator 14 by means of extrusion or coating. At this time, at least one conductor 16 is provided along the periphery of the insulator 14, and the conductor 16 is arranged in a length direction of the insulator 14 and buried in the heating material 18 while the heating material 18 is extruded or coated.
Fig. 3 depicts that the conductors 16 are arranged up, down, right and left, but it is just an example for illustration, and the arrangement of the conductors 16 is not limited thereto. For example, the number or locations of conductors 16 may be suitably adjusted depending on various factors such as a caliber of the pipe unit 12 and the (heat transfer) performance of the heating material 18.
A gap between the arranged conductors 16 serves as a resist R, and a relation between the resistor R and the heat formed between the gaps of the conductors 16 is Calorie (Q) ∝ (Square of the intensity of current (i²) Resistance (R)).
Also, the temperature and the calorie have a relation: Temperature (T) ∝ Calorie (Q), and it may be generally expressed as Resistance (R) = Specific resistance (ρ)×Gap between conductors (L) / Area of the insulator (S).
Arranging the above relations, L = R × S / ρ and T ∝ Q ∝ i²R. Therefore, R ∝ (T / i²), and L ∝ (T S / i²ρ). Thus, according to this embodiment, the conductors 16 are arranged to satisfy the following equation.
[Equation]
Gap between Conductors (L) ∝ (Temperature (T)· Area of Insulator (S)) / (Square of Intensity of Current (i²)·Specific Resistance (ρ))
Referring to Fig. 2, a terminal connector 22 electrically connected to the buried conductor 16 is connected to one end of the heating pipe 10 of this embodiment. The terminal connector 22 is electrically connected to a power supply 24.
If an electric current flows through the conductor 16, the conductor 16 generates an electric resistance heat. This resistance heat is uniformly transferred to the entire heating material 18 due to the characteristics of the heating material 18.
Since the heating material 18 surrounds the pipe unit 12, the entire surface of the pipe unit 12 is heated due to the heating material 18. Thus, the entire surface of the pipe unit 12 is heated to have uniform temperature.
In case a plurality of heating pipes 10 configured as above are arranged in a length direction, it is required to electrically connect conductors 16 of adjacent heating pipes 10 with each other. Thus, in this embodiment, a connector 20 is formed at one end of each heating pipe 10.
As shown in Figs. 2 and 4, a peeled groove S is formed at one end of each heating pipe 10 to expose a part of the surface of the pipe unit 12. The connector 20 is fixed at the peeled groove S. The conductor 16 buried in the heating pipe 10 is connected to one side of the connector 20, and a connection cable C having an electric connection function is connected to adjacent connectors 20.
Fig. 2 illustrates that the connector 20 is formed at one end of each heating pipe 10, and the terminal connector 22 is connected the other end thereof. But, it is just an example and this disclosure is not limited thereto. In other words, connectors 20 may be formed at both ends of the heating pipe 10, and such a heating pipe 10 may be connected between other heating pipes 10 such that three or more heating pipes 10 may be arranged and connected in a length direction.
Due to the above structure, the heating pipes 10 of this embodiment may be easily electrically connected with each other.
According to this embodiment, in case a plurality of heating pipes 10 are connected, a connection portion of the connectors 20 of adjacent heating pipes 10 is exposed. Thus, as shown in Fig. 2, an insulating protective tube 26 is formed at the connection portion so as to protect the electric connection portion. The insulating protective tube 26 allows the connector 20, the conductor 16 and the connection cable C not to be exposed.
The insulating protective tube 26 is selected in this embodiment. But, it is just an example and this disclosure is not limited thereto. For example, an insulating tape may be wound thereon instead of the insulating protective tube 26.
Fig. 5 is a sectional view showing a heating pipe according to another embodiment disclosed herein.
As shown in Fig. 5, in this embodiment, a protective sheath 28 may be further provided around the heating pipe 10, namely on an outer periphery of the heating material 18, according to the usage of the heating pipe 10. Other components 12, 14, 16, 18 of the heating pipe of this embodiment are substantially identical to those of the former embodiment, so they are not explained in detail again.
While the exemplary embodiments have been shown and described, it will be understood by those skilled in the art that various changes in form and details may be made thereto without departing from the spirit and scope of this disclosure as defined by the appended claims.
The heating pipe disclosed herein may be applied in case it is required to apply a uniform and proper temperature to a fluid flowing along a pipe.

Claims (5)

  1. A heating pipe, comprising:
    a pipe unit;
    an insulator formed in a length direction of the pipe unit while surrounding a surface of the pipe unit;
    a plurality of conductors formed in the length direction of the pipe unit along a periphery of the insulator and arranged with gaps therebetween; and
    a heating material formed in a length direction of the insulator while surrounding a surface of the insulator,
    wherein the conductors are buried in the heating material.
  2. The heating pipe according to claim 1, further comprising:
    a peeled groove formed to expose a surface of the pipe unit; and
    a connector formed at the peeled groove and electrically connected to the conductors,
    wherein the connector is electrically connected to a connector of an adjacent heating pipe.
  3. The heating pipe according to claim 2,
    wherein the connector is electrically connected to the connector of the adjacent heating pipe through a connection cable.
  4. The heating pipe according to claim 1,
    wherein a protective sheath is formed on an outer periphery of the heating material.
  5. The heating pipe according to any one of claims 1 to 4,
    wherein the gap between the conductors arranged along a periphery of the insulator is set to satisfy the following equation:
    [Equation]
    Gap between Conductors (L) ∝ (Temperature (T)· Area of Insulator (S)) / (Square of Intensity of Current (i²)·Specific Resistance (ρ)).
PCT/KR2010/002150 2009-05-27 2010-04-08 Heating pipe WO2010137797A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2009-0046434 2009-05-27
KR1020090046434A KR20100128028A (en) 2009-05-27 2009-05-27 Heating pipe

Publications (1)

Publication Number Publication Date
WO2010137797A1 true WO2010137797A1 (en) 2010-12-02

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Application Number Title Priority Date Filing Date
PCT/KR2010/002150 WO2010137797A1 (en) 2009-05-27 2010-04-08 Heating pipe

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KR (1) KR20100128028A (en)
WO (1) WO2010137797A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5937976U (en) * 1982-09-03 1984-03-10 株式会社フジクラ Heat pipe type long heating element
JPH06231868A (en) * 1993-02-01 1994-08-19 Michio Arai Heating coarse particle and heating structure using the particle
JPH06231864A (en) * 1993-02-02 1994-08-19 Matsushita Electric Ind Co Ltd Heat roller and manufacture thereof
JPH08328414A (en) * 1995-05-30 1996-12-13 Ricoh Co Ltd Heat roller and its production
JP2002083672A (en) * 1999-09-30 2002-03-22 Miyoshi Electronics Corp Pipe heater and fluid-heating system using the pipe heater

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5937976U (en) * 1982-09-03 1984-03-10 株式会社フジクラ Heat pipe type long heating element
JPH06231868A (en) * 1993-02-01 1994-08-19 Michio Arai Heating coarse particle and heating structure using the particle
JPH06231864A (en) * 1993-02-02 1994-08-19 Matsushita Electric Ind Co Ltd Heat roller and manufacture thereof
JPH08328414A (en) * 1995-05-30 1996-12-13 Ricoh Co Ltd Heat roller and its production
JP2002083672A (en) * 1999-09-30 2002-03-22 Miyoshi Electronics Corp Pipe heater and fluid-heating system using the pipe heater

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Publication number Publication date
KR20100128028A (en) 2010-12-07

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