KR101543395B1 - Duplex tubular type heat unit hasing carbon heating element - Google Patents

Abstract

The present invention relates to a duplex tubular type heat unit using a carbon heating element. The present invention includes: a central tube (100), wherein a carbon heating element (140) is wound around an outer circumferential face of the central tube in a helix form, embedded in a heating tube (100); an electrode (120) having a fitting protrusion (121) formed to protrude so as to be inserted into one end of the central tube (110) and a screw hole (122) formed by penetrating toward the inside of the electrode at the opposite center of the fitting protrusion (121); and a plug (130) having a screw coupling part (131) screwed to the screw hole (122) of the electrode (120) and a lead wire inserting hole (132) penetrating the center of the screw coupling part (131).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a tubular heat exchanger having a double-

The present invention relates to a tubular heating apparatus using a carbon heating element, more particularly, to a carbon heating element and a lead wire in a tubular heating apparatus, in which connection failures are minimized while minimizing parts, And more particularly, to a tubular heating apparatus using a carbon heating element capable of improving durability of a tubular heating apparatus using a heating element.

Generally, in a tubular heating device using a carbon heating element, a carbon heating element made by twisting carbon yarn bundles having a small thickness is embedded in a vacuum tube, and the carbon heating element is connected to an electrode so that a carbon heating element is heated by a power source As a result, the tubular heating apparatus using such a carbon heating element has a high heating efficiency and its frequency of use is gradually increasing.

For example, a technology relating to a heater or a heating device using a carbon heating element is disclosed in Korean Utility Model Publication No. 0311696 (published on April 26, 2003) and Korean Patent Registration No. 0919748 (published on September 29, 2009) have.

However, since the carbon heating element and the electrode are connected to each other by the clip-type connecting means, the carbon heating element is connected to the carbon heating element by an excessive pressure The connection portion between the carbon heating element and the power source is very weak, and electrical defects such as poor connection of the power source, spark, short circuit, disconnection, and the like frequently occur, and the life of the device is shortened There were problems.

The main cause of this defect is that the carbon yarn is composed of a thinner yarn than the hair, and it is difficult to connect the electrode because there is no hardness such as nichrome or tungsten, and it is shorted or damaged by the pressure when the carbon yarn and the electrode metal are compressed. Therefore, There is a problem that a spark or a short circuit occurs due to defects.

In addition, although the expansion ratio between the carbon fiber and the electrode was different from that of the electrode, the carbon fiber was loosened due to the thermal elongation due to heating, and local heat and short circuit due to the contact failure eventually occurred.

Due to these reasons, it has been difficult to make the capacity of the carbon heating element to be a high-capacity, high-temperature generating device.

In order to overcome and solve the above problems, Korean Patent Registration No. 0921591 (published on Oct. 13, 2009) and Korean Utility Model No. 0452815 (issued on March 21, 2011) disclose that a carbon heating element sharply breaks, So as to be connected to the electrode without being pressed.

Figs. 1 to 3 show a description of an electrode structure of a tubular heating device using a carbon heating element disclosed in Korean Utility Model Publication No. 0452815. Fig.

1 to 3, an electrode structure of a tubular heating device using a carbon heating element according to the related art is characterized in that a carbon heating element 20 is provided in a longitudinal direction inside a heating tube 10, Both ends of the carbon heating body 20 are electrically connected to the external electric wire 56 through the lead wire 50. The end of the carbon heating body 20 is inserted into the groove 35 of one side edge portion, A screw groove 32 formed at the center of the outer surface is inserted into the through hole 34 at a right angle and connected to the through hole 34 and an electrode 30 connected to the screw groove 32 of the electrode 30 Wherein the male threaded portion 42 presses the carbon heating element 20 against the inner surface of the threaded groove 32 and the lead wire 50 is inserted into the hole 44 in the axial direction, And an electrically conductive conductive plate 46 provided between the screw portion 42 and the carbon heating element 20.

The lead wire 50 extends through the plug 40 and is exposed to the front surface of the male screw portion 42. The bent portion 54 'of the end portion 54 contacts the conductive plate 46, And a portion 52 is formed.

The electrode 30 is formed in a cylindrical shape so as to be inserted into the heating tube 10 while being in sliding contact therewith. A groove 35 formed at one side of the inner corner portion extends through the through hole 34, Lt; / RTI >

A hole 44 is formed in the center of the plug 40 in the axial direction, and the lead wire 50 is coupled to the outside of the hole 44.

A thread groove 32 is formed at a predetermined depth in the center of the outer surface of the electrode 30 and the thread groove 32 is connected to the inner end of the electrode 30 at right angles.

At this time, the carbon heating body 20 is inserted into the through hole 34 at the both ends thereof by being inserted into the groove 35, and is tightly fixed by the plug 40 assembled in the screw groove 32.

The plug 40 has a male screw portion 42 having a reduced diameter and an end at one end thereof assembled to the screw groove 32 and presses the carbon heating element 20 inserted at right angles to the through hole 34, The power is supplied smoothly to the carbon heating element 20 by inserting the conductive plate 46 into the screw groove 32. At this time,

As described above, the carbon heating element 20 is inserted into the through hole 34 formed at right angles to the thread groove 32 of the electrode 30 so that power can be connected between the lead wire 50 and the carbon heating element 20 The end of the carbon heating element 20 is inserted into the groove 35 formed on the outer surface of the electrode 30 connected to the through hole 34 and inserted into the through hole 34, And was tightly fixed by the plug 40 to be assembled.

Therefore, since the one end of the carbon heating element 20 is pressed tightly against the plug 40 while being inserted in the through hole 34 in a linear structure, the state of tightening the plug 40 is reduced The end portion of the carbon heating element 20 is disposed in the through hole 34 in a straight line without any restriction, so that the carbon heating element 20 can be easily detached from the through hole 34.

When the end of the carbon heating element 20 is connected to the power source by contacting the end of the carbon heating element 20 with the lead wire 50 in the electrode 30 coupled to the plug 40, Since the bent portion 54 'of the lead wire and the end portion of the carbon heating element are in contact with each other, the conductive plate 46 is inserted into the bent portion 54' of the lead wire 50, And the contact area is widened to smooth the current flow.

Therefore, conventionally, there has been a disadvantage that a conductive plate 46 having excellent electrical conductivity such as nickel or a nickel alloy, which is a separate component, has to be inserted into the electrode 30 as described above.

Registered Utility Model No. 0311696 (Registered on 26th April 2003, Name: Heater using carbon heating element) Korean Patent Publication No. 0919748 (published on September 29, 2009, entitled "Tubular heating device using carbon heating element") Korean Registered Patent No. 0921591 (published on October 13, 2009, entitled "Connection Device for Connecting Carbon Yarn and Electrode of Carbon Fiber Heater Lamp) Korea Registered Utility Model No.0452815 (2011. 21, Announcement, Name: Electrode Structure of Tubular Heating Device Using Carbon Heating Element)

Accordingly, the present invention has been developed to solve and solve the problems of the electrode connection structure disclosed in Korean Utility Model Registration No. 0452815. The object of the present invention is to provide a method of connecting a carbon heating element and a lead wire in a tubular heating device, Provides a tubular heating device with a double tube structure using a carbon heating element which can minimize connection failure while avoiding components such as the same conductive plate, thereby improving connection efficiency and improving durability of a heater lamp using a carbon heating element I have to.

That is, according to the present invention, a through-hole penetrating through a conventional electrode disclosed in Korean Utility Model Registration No. 0452815 is formed so that the end portion of the carbon heating element is inserted into the through hole in the electrode, So that the end of the carbon heating element can not be easily detached from the electrode. In addition, since the carbon heating element crosses inside the electrode in a cross shape, it is possible to prevent contact between the bent portion of the lead wire So that the area can be relatively widened as compared with the linear shape.

According to an aspect of the present invention, there is provided a tubular body having a central tube body formed by spirally winding a carbon heating body on an outer circumferential surface thereof, and a fitting protrusion, And a plug having a threaded portion engaged with a threaded groove of the electrode and having a lead wire insertion hole formed through the center of the threaded portion, And a power source is connected by connecting a bent portion of the lead wire and a carbon heating element sandwiched inside the electrode by inserting one end portion of a lead wire connected to the electric wire. In the tubular heating device of the double pipe structure using the carbon heating body, The carbon heat generating element is orthogonal to the screw groove of the electrode so that one end of the carbon heating element can be inserted and fixed A first through hole passing through the inside of the electrode and a second through hole are formed in a cross shape and one end of the carbon heating element is inserted and fixed in a cross shape crosswise through the first through hole and the second through hole, And a carbon heating element in which the bent portion of the lead wire and the carbon heating elements crossed with each other are in contact with each other as the threaded portion of the inserted plug is screwed into the thread groove of the electrode. .

According to the present invention, a groove formed in one side of the edge of the electrode is formed in one side of the first through hole, and the other side of the first through hole is formed with a guide groove formed in the shape of a groove along the outer circumferential surface of the electrode And is connected to one side of the second through hole.

According to the present invention, in the tubular heating apparatus having a double tube structure using a carbon heating element, an electrode and a plug are used to connect the lead wire and the carbon heating element to connect the power source. In this case, one end of the carbon heating element can be fixed to the outer peripheral surface of the electrode A first through hole and a second through hole passing through the inside of the electrode are formed in a cross shape so as to intersect the screw groove of the electrode so that the carbon heating element is wound in a cross shape with respect to the electrode through the first and second through holes having a cross- The end portion of the carbon heating element is not easily separated from the inside of the electrode and the carbon heating element is inserted into the electrode without inserting a conductive plate having excellent electrical conductivity such as nickel or nickel alloy, The area of contact with the bent portion of the lead wire is defined as a straight line It is possible to increase the connection efficiency while eliminating the connection failure while minimizing (or simplifying) the parts.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view partially showing a configuration of a tubular heating apparatus using a carbon heating element according to a conventional technique. FIG.
FIG. 2 is an exploded perspective view showing a main part of a tubular heating apparatus using the carbon heating element shown in FIG. 1 according to the related art. FIG.
FIG. 3 is an internal cross-sectional view showing a main part of a tubular heating apparatus using the carbon heating element shown in FIG. 1 according to the related art.
FIG. 4 is a perspective view partially illustrating the structure of a tubular heating device using a carbon heating element according to the present invention. FIG.
FIG. 5 is an exploded perspective view showing a main part of a tubular heating device having a double tube structure using the carbon heating element shown in FIG. 4 according to the present invention. FIG.
6 is an exploded perspective view showing the configuration of an electrode and a plug connecting the carbon heating element and the lead wire according to the present invention;
7 is an exploded cross-sectional view showing the configuration of an electrode and a plug connecting the carbon heating element and the lead wire according to the present invention.
8 is an assembled cross-sectional view showing the structure of an electrode and a plug connecting the lead wire to the carbon heating element according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The terms defined in describing the present invention have been defined in consideration of the functions of the present invention and should not be construed to limit the technical elements of the present invention.

FIG. 4 is a partially cutaway perspective view of a dual tubular heating device using a carbon heating element according to the present invention. As shown in FIG. 4, a tubular heating device 1 having a double- A core tube 110 wound around a carbon heating element 120 formed by twisting carbon yarns on the outer circumferential surface thereof in a spiral (or coiled) manner is embedded in the heating tube 100 and a lead wire 150 are connected to the carbon heating element 140 by using the electrode 120 and the plug 130 and the crimping portion 101 is formed at both ends of the heating tube 100, The lead wire 150 and the electric wire 170 are connected to each other by a connecting piece 180 made of molybdenum metal.

Here, the heating tube 100 is preferably made of a normal quartz tube or a tempered glass tube which is transparent and excellent in heat resistance, and both ends of the tube are hermetically sealed by a compressed part 101 which is press-molded at a high temperature.

In order to maintain the vacuum state of the heating tube 100 by a general vacuum process for forcibly discharging the air inside the heating tube 100, This is a universal technique used in a general vacuuming process. It is a well-known technology to manufacture the heating tube 100 using a material such as a quartz tube. The description of which will be omitted.

The center tube 110 is made of a material having excellent heat resistance such as a quartz tube or a tempered glass tube and the center tube 110 is wound around the carbon heating element 140 in a spiral (or coiled) And also serves to extend the length and heat generating area of the carbon heating element 140.

The carbon heating body 120 generates heat energy by electric energy supplied from the outside. The carbon heating body 120 is installed in the longitudinal center of the heating tube 110 and the electrodes 120 are coupled to both ends.

Such a carbon heating element 140 is made by twisting a carbon fiber bundle of a fine thickness. Such a carbon heating element 140 is already widely used. That is, it is preferable that the carbon heating element 140 is formed of a carbonaceous yarn in which two or more carbon fiber yarns and non-burnable yarns are cylindrical or linearly formed, and the carbon yarns are manufactured by braiding or weaving.

The present invention is related to the connection structure between the electrode 120 and the plug 130 that connects the carbon heating element 140 and the lead wire 150 to each other so that the electrode 120 and the plug 130 The connection structure of the carbon heating element 140 and the lead wire 150 at the region shown in FIG. 5 is more specifically shown in FIG. 5 to FIG.

5 to 8, the electrodes 120 are fitted on both side ends of the center tube 110 so that the electrodes 120 are slid in the inside of the heating tube 100, And a fitting protrusion 121 protruding from the center tube 110 is formed at one end.

A screw groove 122 is formed in the center of one side of the electrode 120 to have a predetermined depth in the axial direction. The screw groove 122 intersects the first and second through holes 123 and 125 at right angles, .

That is, a groove 124 formed at one side of the edge of the electrode 130 extends in a diagonal direction and a first through hole 123 intersecting with the screw groove 122 in the axial direction penetrates the outer peripheral surface of the electrode 120 And is formed so as to pass through the outer circumferential surface of the electrode 120 in such a structure that the second through hole 125 intersects the axial screw groove 122 at right angles while crossing the first through hole 123 in a cross- .

One side 123a of the first through hole 123 is connected to a groove 124 formed in an oblique direction at one side of the corner of the electrode 120 and the other side 123b of the first through hole 123 is connected to a second And is formed by a guide groove 126 formed in the shape of a groove on one side 125a of the through hole 125 and the outer circumferential surface of the electrode 120.

The guide groove 126 is formed in the outer circumferential surface of the electrode 120 when the end of the carbon heating element 140 is wound around the electrode 120 in a cross shape through the first and second through holes 123 and 125, The carbon heating body 140 is guided to be wound in the form of being buried along the outer surface 126.

Since the guide groove 126 formed in the shape of a groove along the outer peripheral surface of the electrode is provided between the other side 123b of the first through hole 123 and the one side 125a of the second through hole 125, When the electrode 120 is inserted into the heating tube 100 as the carbon heating element 140 does not protrude much from the outer circumferential surface of the electrode 120 and substantially coincides with the outer circumferential surface of the electrode 120 during the winding process, The tubular member 140 can be easily inserted into the heating tube 100 in a sliding contact state without being restricted by insertion movement.

The carbon heater body 140 wound in a spiral shape on the central tube body 110 is not abruptly bent and is guided to be inserted into the first through hole 123 at the outer periphery of the electrode 120 applied to the present invention And the groove 124 is formed in an oblique direction on the outer circumferential surface of the electrode 120 so that the end of the spiral wound carbon heating body 140 can be smoothly bent along the groove 124 So that it can be fitted into the one through hole 123.

The screw groove 122 of the electrode 120 is a portion where the threaded portion 131 of the plug 130 is screwed.

At this time, the electrode 120 is preferably manufactured using a material having conductivity such as carbon, molybdenum, and tungsten and having excellent heat resistance and withstanding high heat, preferably using a carbon material Do.

The plug 130 has a threaded portion 131 which is threadedly engaged with the threaded groove 122 and is protruded on one side of the plug 130. The lead wire insertion hole 132 is inserted into the plug 130 so that the end of the lead wire 150 can be inserted. As shown in Fig.

Since the threaded portion 131 of the plug 130 has a structure in which the diameter of the threaded portion 131 of the plug 130 is reduced at one end of the plug 130, And presses the carbon heating element 140 inserted into the first and second through holes 123 and 125 into a cross shape to closely contact the inner surface of the screw groove 122. [

At this time, the plug 130 may be formed of any one material of carbon, molybdenum, and tungsten, and it is preferable that the plug 130 is made to have conductivity and to withstand high temperature by having heat resistance.

As described above, the electrode 120 and the plug 130 are preferably made of a carbon powder prepared by molding carbon powder into a predetermined mold according to a general molding method, and then molding it into a carbon molded product at a high temperature. And has excellent durability.

The electrode 120 and the plug 130 can be manufactured by machining a predetermined carbon rod (carbon rod) manufactured by the above method with a machine tool such as an NC lathe, a milling machine, or the like.

The electrode 120 and the plug 130 may be formed of a metal material having excellent heat resistance and electrical conductivity such as molybdenum and tungsten in addition to carbon material.

The lead wire 150 is exposed through the lead wire insertion hole 132 of the plug 130 to the front surface of the threaded portion 131 and the bent portion 151 of the lead wire 150 contacts the carbon heating element 140 And a bending portion 152 is formed at an intermediate portion.

In order to improve the contact efficiency between the carbon heating element 140 and the lead wire 150, the end of the lead wire 150 protruded out of the lead wire insertion hole 132 is bent to form a bent portion 151 .

As a result, the carbon heating elements 140 disposed crosswise to the lead wire 150 and the bent portions 151 and the electrodes 120 are in contact with each other, So that the flow of current can be smoothly performed.

The outer end of the lead wire 150 is connected to an external wire 170 through a connecting piece 180. The connecting piece 180 is connected to the heating tube 100 And a molybdenum (Mo) foil having an excellent adhesion to the substrate 101.

The use of the connecting piece 180 made of molybdenum in the crimping portion 101 of the heating tube 100 in a vacuum state as described above is a generally known technique in the field of connecting a power source. So as not to be shaken by the crimping portion 101 formed on the base portion 101. [

As the bending portion 152 formed at the intermediate portion of the lead wire 150 is elastically stretched and contracted, the lead wire 150 has a buffering effect of thermal deformation due to the high temperature heat of the carbon heating element 140.

The bending portion 152 is preferably formed in a shape of 'V' letter or 'W' letter, zigzag, coil or the like.

The electric wire 170 is extended to a predetermined length and a wire terminal 171 is coupled to an end of the electric wire 170 to facilitate connection of a power source. (Not shown).

The cap 160 is preferably made of an insulating material such as ceramic or the like, and prevents leakage of electric current and damage to electric wires.

The assembly process of the tubular heating device 1 having the above-described structure according to the present invention will be described below.

First, the fitting protrusions 121 of the electrode 120 according to the present invention are inserted into both end portions of the center tube 110 to be engaged with each other.

At this time, a plurality of fixing grooves are formed on the outer circumferential surface of the fitting protrusion 121, and a fixing protrusion corresponding to the fixing groove is protruded inward from the center tube 110 so that the electrode 120 is fixed to the center tube 110 It is preferable to fix it.

That is, the fixing protrusion formed on the center tube 110 is heated by heating the end of the center tube 110 at a high temperature in a state where the fitting protrusion 121 of the electrode 120 is fitted to the end of the center tube 110, A pressing mechanism is operated outside the end of the central tube body 110 to press the end of the central tube body 110 and to be fixedly coupled to the shape of the fixing groove of the fitting projection 121, .

A process of winding the carbon heating element 140 through the first and second through holes 123 and 125 of the electrode 120 after the center tube 110 and the electrode 120 are assembled and assembled with the lead wire 150, The following is a detailed description of the process of linking.

5 and 6, when the carbon heating element 140 is wound on the center tube 110 in a spiral (or coiled) manner, the end portion of the carbon heating element 140 is connected to the first through- 123 to the other side 123b of the opposite first through hole 123 and then the end of the carbon heating element 140 is moved along the guide groove 126 to the outer peripheral edge of the electrode 120 And is then passed through the one side 125a of the second through hole 125 to the inside of the electrode 120 so that the end of the carbon heating element 140 is exposed to the other side 125a of the second through hole 125.

At this time, it is preferable that the end of the carbon heating element 140 is positioned in the second through hole 125 so as to coincide with the outer circumferential surface of the electrode 120 without being exposed to the outside of the second through hole 125, When the end of the carbon heating element 140 is exposed to the outside of the electrode 120, it is preferable that the carbon heating element 140 is cut and finished to be aligned with the outer circumferential surface of the electrode 120.

The carbon heating element 140 inserted into the electrode 120 through the first and second through holes 123 and 125 is crossed with the screw groove 122 in the electrode 120.

7, the lead wire 150 is inserted into the lead wire insertion hole 132 of the plug 130 and protruded to the end portion of the lead wire insertion hole 132, The bending portion 151 is formed by bending the bending portion 151 in the normal direction so that the threaded portion 131 of the plug 130 having the bent portion 151 is screwed into the threaded groove 122 of the electrode 120, 8, the bent portion 151 is in contact with the carbon heating element 140 while pressing the carbon heating element 140 according to the screwing.

As described above, according to the present invention, since the carbon heating element 140 is connected to the lead wire 150 by the electrode 120 and the plug 130 without abrupt bending, the durability of the carbon heating element 140 is improved, It is possible to extend the service life of the tubular heating device 1 in which the tubular heating elements 140 are used.

According to the present invention, the carbon heating element 140 can be fixed by being cross-wound around the electrode 120 through the first and second through holes 123 and 125 having a cross shape, The carbon heating element 140 intersects the electrode 120 in a cross shape so that the contact area of the lead wire 150 with the bent portion 151 is a straight line It can be expanded relatively.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of various changes, modifications and equivalents.

Accordingly, the above description should not be construed as limiting the scope of the present invention defined by the limits of the following claims.

1: a tubular heating device 100: a heating tubular
101: crimping portion 110: central tube body
120: electrode 121:
122: screw groove 123: first through hole
124: groove 125: second hole
126: guide groove 130: plug
131: Screw connection part 132: Lead wire insertion hole
140: Carbon heating element 150: Lead wire
151: Bending section 152: Bending section
160: Cap 170: Wires
171: wire terminal 180: connecting piece

Claims (2)

A center tube 110 having a carbon heating body 140 spirally wound on an outer circumferential surface thereof is embedded in the heating tube 100 and a fitting protrusion 121 fitted to the center tube 110 at one end is protruded and formed, An electrode 120 having a thread groove 122 formed in the center of the opposite side of the protrusion 121 and penetrating in the longitudinal direction of the protrusion 121 and a threaded portion 131 screwed into the thread groove 122 of the electrode 120, And a lead wire insertion hole 132 formed in the center of the screw engagement portion 131. The lead wire insertion hole 132 of the plug 130 has a lead wire 150 connected to the wire 170, And the carbon heating element 140 inserted in the electrode 120 is brought into contact with the bent portion 151 of the lead wire 150 by inserting one end of the lead wire 150 into the tubular heating device As a result,
A first through hole 123 passing through the inside of the electrode 120 perpendicularly to the screw groove 122 of the electrode 120 so that one end of the carbon heating element 140 can be fixed to the outer circumferential surface of the electrode 120, A second through hole 125 is formed in a cross shape so that one end of the carbon heating element 140 is inserted into the electrode 120 in a cross shape crosswise through the first through hole 123 and the second through hole 125, The threaded portion 131 of the plug 130 in which the lead wire 150 is inserted is screwed into the threaded groove 122 of the electrode 120 so that the bent portion 151 of the lead wire 150 Wherein the carbon heating elements (140) disposed in an intersecting relation with each other are in contact with each other within the electrode (120).
The method according to claim 1,
A groove 124 is formed at one side 123a of the first through hole 123 so as to extend in a diagonal direction at one side of the edge of the electrode 130. An electrode 124 is formed on the other side 123b of the first hole 123, Is connected to one side (125a) of the second through hole (125) by a guide groove (126) formed in a groove shape along the outer circumferential surface of the second through hole (120).

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