KR102164647B1 - Method for setting a electric heater - Google Patents

Abstract

The present invention relates to a method for setting an electric heater which includes the steps of: preparing the electric heater; and installing a prepared explosion-proof electric heater at a deployment location. The electric heater provides a method of setting the electric heater which is the explosion-proof electric heater. Therefore, first, the present invention is capable of maintaining sealing and airtightness properties, and to stably control room temperature or to heat other objects, and is capable of securing chemical and mechanical strength by securing stability even in places where there is a risk of explosion and fire.

Description

Electric heater setting method{METHOD FOR SETTING A ELECTRIC HEATER}

The present invention relates to a method of setting an electric heater, and more particularly, an electric heater (eg, explosion-proof electric heater, etc.) is stably installed at a desired location, and the installed electric heater enables effective heating operation according to the installation purpose, and the electric heater It relates to an electric heater setting method to enable stable and efficient operation for both small and large types of

In the case of an electric heater, for example, an explosion-proof electric heater, it is intended to maintain the sealability and airtightness, which are the characteristics of explosion-proof, and to stably control the room temperature or to heat other objects. In addition, it is also necessary to secure chemical and mechanical strength by securing stability in places where there is a risk of explosion and fire. Technologies that satisfy these issues are being researched and developed. However, there are various types of electric heaters ranging from small to large depending on the standard volume of the electric heater itself, and since the installation location and heating environment are set differently depending on the use and purpose of such electric heaters, stable installation and management of the electric heater itself The overall setting including the is important. However, a technology capable of satisfying this overall part has a problem that is currently insufficient.

Therefore, there is a disadvantage that it is not easy to operate the electric heater in a stable and efficient manner.

Korean Patent Publication No. 10-2015-0045660

The present invention stably installs an electric heater (e.g., explosion-proof electric heater, etc.) at a desired location and enables effective heating operation according to the installation purpose with the installed electric heater, and is stable and efficient for both small and large types of electric heaters. It aims to provide an electric heater setting method to enable operation.

The present invention provides a method for setting an electric heater, comprising: preparing an electric heater; And installing the prepared explosion-proof electric heater in the arrangement position, wherein the electric heater is an explosion-proof electric heater, providing a method of setting an electric heater.

The electric heater setting method according to the present invention has the following effects.

First, it is possible to maintain sealing and airtightness, and to stably control the indoor temperature or to heat other target parts, and it is possible to secure chemical and mechanical strength by securing stability even in places where there is a risk of explosion or fire.

Third, it is possible to set the electric heater for effective and stable heating even for various types ranging from the standard volume of the electric heater itself, small and large.

Fourth, it is possible to set the electric heater to enable efficient and optimized heating operation by setting the installation location and the heating environment differently according to the purpose and purpose of the electric heater.

1 is a flowchart sequentially showing a method of setting an electric heater according to an embodiment of the present invention.
2 is a diagram showing an embodiment of the electric heater according to FIG. 1.
3 to 5 are views showing another embodiment of the electric heater according to FIG. 1.
6 to 8 are diagrams showing configurations of the electric heater according to FIG. 3.

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

1 is a flowchart sequentially showing a method of setting an electric heater according to an embodiment of the present invention. Referring to FIG. 1, a method for setting an explosion-proof electric heater includes: preparing an electric heater; And installing the prepared explosion-proof electric heater at the placement position and installing the auxiliary module 100 under the electric heater. Here, the electric heater includes an explosion-proof electric heater, and in the step of preparing the electric heater, the electric heater may be a plurality of electric heaters of different types from each other, or any one single electric heater.

2 is a diagram showing an embodiment of the electric heater according to FIG. 1. Referring to FIG. 2, the explosion-proof electric heater is a heater made of a stainless material, and an electric heating pipe may be used as a heating component. This product can be used in Zone 1 and Zone 2 of explosive hazardous locations, and is separately equipped to perform heating for adjacent locations and specific locations. It is also possible to further use it for preheating of coolant and heating lubricants in mechanical installations, internal combustion engines, generators in places where hazardous gaseous or vapor substances and air are mixed. The specifications of this electric heater are as follows.

<heating output>

1.AC 220V: 0.5kW, 1kW, 2kW, 3kW, 4kW

2.AC 380V: 0.5kW, 1kW, 2kW, 3kW, 4kW, 6kW, 9kW, 18kW

(User can select suitable power according to the volume of heating liquid.')

3. Insulation resistance: ≥20MΩ at room temperature.

4. Electrical strength: When AC 60Hz 1760V, there is no flashover and insulation breakdown for 1 minute.

5. On-Off temperature difference: 10℃～15℃.

6. Explosion protection class: Ex d ⅡB T4 Gb

3 to 5 are views showing another embodiment of the electric heater according to FIG. 1. FIGS. 6 to 8 are views showing the configurations of the electric heater according to FIG. 3. 3 to 7, as an explosion-proof electric heater 2, that is, the explosion-proof electric heater of the present invention includes a heater body 10', a pipe heater 20' accommodated in the heater body 10', and , A wiring cable sealing housing 30' installed at the end of the heater body 10', a cable gland 40' fastened to the wiring cable sealing housing 30', and a thermostat 50'. do. The heater body 10 ′ is fixedly installed on the floor or side of the industrial site, and the pipe heater 20 ′ is inserted into the inside of a stainless steel pipe tube with a hollow inside, and the outside so that heat from the inside can be discharged to the outside. A plurality of radiating fins 110 ′ installed at intervals from each other are installed on the circumferential surface. In addition, the heater body 10 ′ is provided with support portions 121 and 122 at the lower portion and is installed on the floor or side surfaces. In addition, the explosion-proof electric heater according to another preferred embodiment of the present invention is formed by forming a far-infrared ceramic coating layer 130' on the outer surface of the heater body 10'. The far-infrared ceramic coating layer 130 ′ has a large absorption band in the far-infrared region of a relatively long wavelength, and thus thermal energy increases as the thermal emissivity increases during far-infrared radiation, thereby speeding up heat transfer and preventing thermal shock caused by the difference in thermal expansion. To be able to absorb, the far-infrared ceramic coating layer 130' has a particle size of about 200 mesh (74 μm') and a specific gravity of about 1.65 to 1.70. As shown in FIG. 2, the pipe heater 20 ′ includes a heating wire 210 ′ in a metal protection tube 230 ′ in the shape of a coil, and an insulation material of magnesium oxide (MgO) excellent in thermal conductivity and insulation. By filling and compressing them together at (220'), they are robust against external physical impacts and increase the thermal efficiency of electric thermal energy, so that they can be properly processed in various shapes according to the purpose. In particular, the pipe heater 20 ′ is inserted into the heater body 10 ′, and is generally bent in a “U” shape, and the wiring connection structure is only one side so that the wiring length is shortened. There is an advantage.

The pipe heater 20 ′ is filled with a heating wire 210 ′ and an insulating material 220 ′ and sealed with a metal protection tube 230 ′, and the connection power supply terminal 246 ′ of the silicon coated terminal part 240 ′ is It is formed to protrude outward. The heating wire 210 ′ is located at the center of the metal protection tube 230 ′, and a nichrome wire is mainly used as the heating wire 210 ′. At this time, the nichrome wire is heat-treated and washed to elaborately wound in a coil shape for a long life of the heater and the required heat. The insulating material 220 ′ may have a high temperature of 600 to 700° C. or higher while the heating wire 210 ′ is in use. In this situation, there is a risk of explosion due to high temperature when it comes into contact with an external active gas. For this purpose, high-purity (MgO 96.5% or more) magnesium oxide (Magnesia') or a homogeneous material, which is a high-performance heat-resistant conductive material with excellent thermal conductivity, is used to maintain the outer surface of the pipe heater 210' at about 200°C.

The metal protection tube 230' is a tube having a hollow structure, and the material is copper (Cu'), stainless steel (SUS'), etc., and the surface of the metal protection tube 230' is specially treated (plating, ceramic coating). , Teflon coating, enamel coating, etc.') provide excellent acid resistance, and there is no corrosion of the heating wire 210', ensuring a long life. The silicon-coated terminal part 240 ′ is connected via the heating wire 210 ′ and the lead terminal 242 ′, and is manufactured by adopting a welding method according to the optimum conditions in consideration of the size of the heater and the grade of power. . The silicon-coated terminal part 240 ′ has a lead terminal 242 ′, and

It consists of a ruler 244' and a connection power terminal 246'. The lead terminal 242 ′ is connected by welding or the like so that the heating wire 210 ′ is not directly exposed to the outside of the heater body 10 ′, and an insulator 244 made of hard magnetic, etc. at one side of the lead terminal 242 ′. ') is provided to prevent deterioration of the dielectric strength when the surface is wet, especially when salt or dust adheres. In addition, a connection power terminal 246 ′ is provided on one side of the insulator 244 ′ and is connected to a power cable 60 ′ passing through the cable gland 40 ′ to be described later.

The pipe heater 20 ′ configured as described above is composed of the metal protection pipe 230 ′ and magnesium oxide (MgO), which is a heat-resistant insulator, by applying pressure at a high pressure, so that a heating element using a conventional nichrome wire is exposed to the outside. It is possible to reduce the risk of fire due to electric short circuit, electric shock, or overheating, and also, since the heating wire 210 ′ is blocked from air, oxidation does not occur. Temperature control is easy and there is no insulation degradation at high temperature. In addition, when infrared coating is applied to the metal protection tube 230', the pipe heater 20' is

It can be made with an infrared heater and can be processed in various forms. Next, a wiring cable sealing housing 30' according to the present invention will be described. The wiring cable sealing housing 30 ′ is coupled to the end of the heater body 10 ′ and inserted into the heater body 10 ′, such as excessive thermal stress, transient current, spark, etc. of the pipe heater 20 ′. To form an explosion-proof space so that the internal explosion generated by the internal explosion is not exposed to the outside, openings 310' and 320' open to both sides are provided, so that the pipe heater 20' is connected to the heater body 10'. It can be mounted inside, and an insertion groove 330' of the cable gland 40' to be described later is formed through the lengthwise at an appropriate position on the upper side.

Here, a helical groove 312 ′ is formed in the one side opening 310 ′, and a locking stop 340 ′ is provided to seal the inside by screwing into the helical groove 312 ′. By sealing together, the risk of the bolt being bounced out when a conventional electric heater is combined with a bolt or the like is eliminated. In addition, a foreign material inflow preventing member 350' is provided in the other opening 320' to seal the space between the heater body 10' and the wiring cable sealing housing 30'. The foreign matter inflow preventing member 350' is fitted into the metal protection pipe 230' of the above-described pipe heater 20' and fastened with a fixing bolt 352'. The wiring cable sealing housing 30' may be integrally formed with the heater body 10'. Therefore, the bonding surface disappears, and the explosion-proof efficiency is further increased. In addition, at one side of the wiring cable sealing housing 30', it is connected to the silicone coated terminal 240' of the pipe heater 20' mounted inside the heater body 10' so that grounding can be made, thereby preventing static electricity. A ground terminal part 360 ′ for preventing it is further provided. Next, a description will be given of the cable gland 40' according to the present invention.

The cable gland 40 ′ is mounted in an insertion groove 330 ′ formed on the upper side of the wiring cable sealing housing 30 ′, and has a plurality of protrusions on the upper inner wall of the metal body 410 ′ in the shape of an upper beam. A through-hole through which the power cable 60 ′ for supplying power to the silicone coated terminal part 240 ′ of the pipe heater 20 ′ passes through the chin or hexagonal shape, and in the upper and lower body 410 ′. 420') is formed. In addition, a screw part 412 ′ is formed at the lower end of the body 410 ′, so that it is screwed into the insertion groove 330 ′ of the wiring cable sealing housing 30 ′, and at this time, the elastic packing 430 ′ ) And a silicon component-containing grease is used. On the other hand, the explosion-proof electric heater according to another preferred embodiment of the present invention divides the heater body 10' and the thermostat' 50'.

It was thus formed. The thermostat 50 ′ is a known technology, and is connected to the power cable 60 ′ of the cable gland 40 ′ described above to detect whether or not the room temperature is higher than a preset temperature. Control the drive. In more detail, the thermostat 50' is an automatic switch that opens when the temperature rises and closes when the temperature rises, and it is a bimetal that is used for this purpose. Ebimetal is a combination of two alloy plates with different coefficients of linear expansion, and the degree of bending of the bimetal in a bow shape changes according to temperature change, so use this to open and close the switch. The present invention is formed by separating the thermostat 50 ′ and the heater body 10 ′, so that the high-temperature heat transferred from the heater body 10 ′ is not directly transferred to the thermostat 50 ′. ), there is a convenience that can be used by replacing only the thermostat (50') separately in case of failure. In addition, since the thermostat 50 ′ is not interfered with by heat transmitted from the surface of the heater body 10 ′, there is an advantage in that more precise temperature control can be performed.

The effect of the explosion-proof electric heater is that when spark or overdischarge occurs in the pipe heater 20' during use, it is first cut off inside the heater body 10', and the wiring cable sealing housing connected to the heater body 10' Since the space between (30') is also sealed with the foreign substance inflow prevention member 350', it is possible to prevent the inflow of external combustible materials, and the pipe heater 20' in the wiring cable sealing housing 30' Even if an explosion occurs due to sparks caused by over-discharge generated in the silicon coated terminal portion 240' of, the locking plug 340' is screwed to withstand the pressure so that the mechanical strength is further increased. In addition, the heater body 10 ′ and the wiring cable sealing housing 30 ′ are formed as a unit of stainless steel, etc. to have an explosion-proof structure, thereby inserting the pipe heater into the heater body 10 ′. It is a useful invention with improved explosion-proof properties by consisting of a double explosion-proof structure with (20'). In addition, since the heating wire 210 ′ of the pipe heater 20 ′ is surrounded by magnesium oxide (MgO) outside, there is no fear of corrosion and damage to the coating even when used for a long time. In addition, the over-discharge generated in the terminal part 240 ′ of the pipe heater 20 ′ flows to the ground through the ground wire 370 ′ of the wiring cable sealing housing 30 ′ to fundamentally block the possibility of explosion. It has increased explosion-proof properties.

Here, the electric heater includes a heater body 10 ′, a plurality of radiating fins 110 ′ provided on the heater body 10 ′ to emit internal heat, and mounted inside the heater body 10 ′. The pipe heater 20 ′ and the heater body 10 ′ include support portions 121 and 122 provided at the lower portion. The support portions 121 and 122 include a first-first support portion 1211 formed vertically, and a first-second support portion 1212 horizontally extending outward from the first-first support portion 1211. 1 support part 121, a 2-1 support part 1221 formed vertically and facing the 1-1 support part 1211, and a second support part 1221 extending horizontally outward from the 2-1 support part 1221 It includes a second support portion 122 provided with a -2 support portion 1222.

The electric heater further includes a first structure 130 for pressing and fixing the first support part 121 and the second support part 122 underneath, and the first structure 130 comprises: The 1-2 support part 1212 is located outside the 1-1 outer mounting body 131 into which the 1-2 support part 1212 is inserted into the inner insertion groove, and the 1-2 support part 1212 is inside 1-2 outer mounting body 132 adjacent to the 1-1 outer mounting body 131, and the 2-2 supporting part 1222, which are located with the 1-2 support part 1212 therebetween. The 2-1 outer mounting body 133 which is located outside and into which the 2-2 support part 1222 is inserted into the inner insertion groove, and the 2-2 support part 1222 is located inside the 2-2 The 2-2 outer mounting body 134 adjacent to the 2-1 outer mounting body 133 with the support 1222 interposed therebetween, the 1-2 outer mounting body 132 and the second It includes a driving body 135 provided between the 2 outer mounting body 134.

In the driving body 135, one end of the 1-2 outer mounting body 132 is interlocked with one end, and one end of the 2-2 outer mounting body 134 is interlocked with the other side, and the 1-2 The first support part 121 is pressed and fixed between the 1-1 outer mounting body 131 and the 1-2 outer mounting body 132 by moving the outer mounting body 132 forward and backward. The 2-2 outer mounting body 134 is moved forward and backward so that the second support part 122 is pressed and fixed between the 2-1 outer mounting body 133 and the 2-2 outer mounting body 134 .

The electric heater further includes a second structure 140 provided under the first structure 130, and the second structure 140 interlocks with the 1-1 outer mounting body 131 The first-first outer mounting body 131 is moved up and down, and when the first-second support part 1212 is pressed downward, the first-second support part 1212 and the 1-1 The anti-aircraft 1-2 outer mounting body 132 is pressed downward to the first edge region EL1 of the support 1211 to fix the second, and interlocked with the 2-1 outer mounting body 133 -1 The outer mounting body 133 is moved up and down, and the 2-2 support part 1222 is pressed downward when flowing downward, so that the 2-2 support part 1222 and the 2-1 support part 1221 The aircraft 2-2 outer mounting body 134 is pressed downward to the second edge area EL2 of and fixed.

The second structure 140 is provided with a first mounting structure 141 provided to be mounted on the first-first outer mounting body 131 in a symmetrical shape, and the 2-1 A second mounting structure 142 is provided so as to be mounted on the upper side of the outer mounting body 133, and the first mounting structure 141 is provided with a first moving body 1411, and the 1-1 support part The outer side of the 1211 is pressed into contact, and the second seating structure part 142 is provided with a second advancing and retracting movable body 1421 to press the outer side of the 2-1 support part 1221.

The 1-2 support part 1212 has a first through hole formed in a central part, the 2-2 support part 1222 has a second through hole formed in the center part, and the electric heater includes the 1-2 support part ( The first locking body 1431 provided on the upper part of the 1212) and the first locking body 1431 are interlocked so as to be driven up and down by the 1-1 outer mounting body 131 and via the first through hole. ) And a first locking module 143 including a first interlocking bar 1432 interlocked with, a second locking body 1441 provided above the 2-2 support 1222, and the second 2 1 A second locking module 144 including a second interlocking bar 1442 interlocked with the outer mounting body 133 so as to be driven up and down and interlocked with the second locking body 1441 via the second through hole ) More.

The first interlocking bar 1432 descends from the 1-1 outer mounting body 131 and presses the 1-2nd support part 1212 downward with the first locking body 1431, and the second interlocking The bar 1442 descends from the 2-1 outer mounting body 133 and presses the 2-2 support part 1222 downward with the second locking body 1441, and the electric heater is the second structure A lower support 150 installed under 140 to support and fix the second structure, and a first side support 160 installed at one side of the second structure 140 to support and fix the second structure And, a second side support 170 installed on the other side of the second structure 140 to support and fix the second structure.

The lower support 150 further includes a lower body 151 and a lower insertion fixture 152 inserted from the lower body 151 into the first internal space previously formed of the second structure 140 . The lower inserting fixture 152 is provided in a first connection bar 1521 that can be driven up and down from the lower body 151 and the first connection bar 1521 to be provided in the second structure 140. And a first entry body 1522 provided with first protrusions 1523 that enter the first inner space and protrude toward the inner side wall of the side of the first inner space from both sides.

The second structure 140 is provided with a plurality of first internal pressing bodies 145 pressing both sides of the first connection bar 1521 in the first internal space, and the first protrusion 1523 is the When the first connecting bar 1521 moves backwards, the fixing force is exerted by contacting and pressing the upper portion of the first internal pressing body 145 in a locking manner.

The first side support 160 includes a first side body 161 and a first side insert inserted from the first side body 161 into a pre-formed second inner space of the second structure 140 It further includes a stagnation 162. The first side inserting fixture 162 is provided on a second connection bar 1621 that can be driven back and forth from the first side body 161 and the second connection bar 1621, and the second structure ( And a second entry body 1622 having second protrusions 1623 that enter the second inner space of 140) and protrude toward the inner side wall of the side of the second inner space from both sides.

The second structure 140 is provided with a plurality of second internal pressing bodies 146 for pressing both sides of the second connection bar 1621 in the second internal space, and the second protrusion 1623 is the When the second connection bar 1621 moves backward, it is pressed against the upper portion of the second internal pressing body 146 in a locking manner to exert a fixing force. The second side support 170 includes a second side body 171 and a second side insert inserted from the second side body 171 into a third interior space previously formed of the second structure 140 It further includes a stagnation 172.

The second side inserting fixture 172 is provided on a third connection bar 1721, which can be driven back and forth in the second side body 171, and the second structure ( And a third entry body 1722 provided with third protrusions 1722 that enter the third interior space of 140) and protrude toward the inner side wall of the side of the third interior space from both sides.

The second structure 140 is provided with a plurality of third internal pressing bodies 147 for pressing both sides of the third connection bar 1721 in the third internal space, and the third protrusion 1723 is the When the third connection bar 1721 moves backward, it is pressed against the upper portion of the third internal pressing body 147 in a locking manner to exert a fixing force.

The sinker first side support 160 is provided so as to move up and down on one side of the lower support, and includes a first protruding body 163 of a predetermined shape protruding from the inside to an upper portion in a set range, and the first side support 160 1 The external heating range of the electric heater is adjusted according to the appearance and disappearance range of the protruding body 163. The sinker second side support 170 is provided so as to move up and down on one side of the lower support, and includes a second protruding body 173 protruding from the inside to an upper portion in a set range, and the second protruding body The external heating range of the electric heater is adjusted according to the appearing and disengaging range of (173).

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those of ordinary skill in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical scope of the present invention should be determined by the technical spirit of the appended claims.

10': heater body
20': pipe heater
30': sealing housing for wiring cables
40': Cable Grand

Claims (2)

As an electric heater setting method,
Preparing an electric heater; And
Including the step of installing the prepared explosion-proof electric heater in the arrangement position,
Further comprising the step of installing an auxiliary module 100 under the electric heater,
The electric heater
A heater body 10',
A plurality of radiating fins 110 ′ provided in the heater body 10 ′ to emit internal heat,
A pipe heater 20' mounted inside the heater body 10',
The heater body 10 ′ includes support portions 121 and 122 provided at the lower portion,
The support portions 121 and 122,
A first support portion 121 having a vertically formed 1-1 support portion 1211 and a 1-2 support portion 1212 horizontally extending outward from the 1-1 support portion 1211,
A 2-1 support part 1221 formed vertically and facing the 1-1 support part 1211, and a 2-2 support part 1222 extending horizontally outward from the 2-1 support part 1221 It includes a second support portion 122 provided,
The electric heater,
It further includes a first structure 130 for pressing and fixing the first support portion 121 and the second support portion 122 below,
The first structure 130,
A 1-1 outer mounting body 131 which is located outside the 1-2 support part 1212 and into which the 1-2 support part 1212 is inserted into an inner insertion groove,
A 1-2 outer mounting body 132 located inside the 1-2 support part 1212 and adjacent to the 1-1 outer mounting body 131 with the 1-2 support part 1212 interposed therebetween Wow,
A 2-1 outer mounting body 133 located outside the 2-2 supporting part 1222 and into which the 2-2 supporting part 1222 is inserted into an inner insertion groove,
A 2-2 outer mounting body 134 located inside the 2-2 supporting part 1222 and adjacent to the 2-1 outer mounting body 133 with the 2-2 supporting part 1222 interposed therebetween Wow,
And a driving body 135 provided between the 1-2 outer mounting body 132 and the 2-2 outer mounting body 134,
The driving body 135,
One end of the 1-2 outer mounting body 132 is interlocked on one side, and one end of the 2-2 outer mounting body 134 is interlocked on the other side, and the 1-2 outer mounting body 132 moves forward and backward. Flow so that the first support part 121 is pressed and fixed between the 1-1 outer mounting body 131 and the 1-2 outer mounting body 132,
The second support part 122 is pressed and fixed between the 2-1 outer mounting body 133 and the 2-2 outer mounting body 134 by moving the 2-2 outer mounting body 134 forward and backward. And
The electric heater,
Further comprising a second structure 140 provided under the first structure 130,
The second structure 140,
Interlocking with the first-first outer mounting body 131 to move the first-first outer mounting body 131 up and down, and when the first-first outer mounting body 131 is moved downward, the first-second support portion 1212 is pressed downward, The 1-2 support part 1212 and the first edge area EL1 of the 1-1 support part 1211 are pressed downward to fix the anti-aircraft 1-2 outer mounting body 132,
The 2-1 outer mounting body 133 is interlocked with the 2-1 outer mounting body 133 to move the 2-1 outer mounting body 133 up and down, and when the 2-1 outer mounting body 133 is moved downward, the 2-2 support part 1222 is pressed downward, The 2-2 support part 1222 and the second edge area EL2 of the 2-1 support part 1221 are pressed downward to fix the aircraft 2-2 outer mounting body 134,
The second structure 140,
A first mounting structure portion 141 is provided to be mounted on the upper portion of the 1-1 outer mounting body 131 as a symmetrical shape,
A second mounting structure 142 is provided in the shape of an a-shape so as to be mounted on the upper portion of the 2-1 outer mounting body 133,
The first seating structure part 141 is provided with a first advancing and retracting movable body 1411 to press-contact the outside of the 1-1 support part 1211,
The second seating structure part 142 is provided with a second advancing and retreating movable body 1421 to pressurize the outside of the 2-1 support part 1221,
The 1-2 support part 1212 has a first through hole formed at the center thereof,
The 2-2 support part 1222 has a second through hole formed at the center thereof,
The electric heater,
A first locking body (1431) provided on an upper portion of the 1-2 support portion (1212),
A first interlocking bar 1432 interlocked with the first-1 outer mounting body 131 so as to be driven up and down and interlocked with the first locking body 1431 via the first through hole A locking module 143,
A second locking body (1441) provided on an upper portion of the 2-2 support part (1222),
A second interlocking bar 1442 interlocked with the 2-1 outer mounting body 133 so as to be driven up and down and interlocked with the second locking body 1441 via the second through hole Further comprising a locking module 144,
The first interlocking bar 1432 descends from the 1-1 outer mounting body 131 and presses the 1-2nd support part 1212 downward with the first locking body 1431,
The second interlocking bar 1442 descends from the 2-1 outer mounting body 133 and presses the 2-2 support part 1222 downward with the second locking body 1441.
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