JP3183899U - Heater - Google Patents

Abstract

There is provided a heater having a structure capable of preventing erosion caused by exhaust gas of a heating element in a protective tube.
A structure of a heater includes a heating element and a protective tube that covers an outer edge of the heating element. The heating element 10 has a tangential end 13 exposed from two open ends of the protective tube 11. Both sides of the opening end of the protective tube 11 are fixed and sealed by a fixing member 12. Airtight layers 14 are formed at the open ends on both sides of the protective tube 11. The airtight layer 14 is made of a silicone gel or a ceramic sealing gel. A heat insulating layer 15 is formed at the inner end of the hermetic layer 14.
[Selection] Figure 2

Description

  The present invention relates to a heater, and more particularly to a heater having a structure that can be applied to a heating device of an air heating furnace or an exhaust gas treatment device and can prevent the effects of erosion or reaction of a heating element.

  As shown in FIG. 1, the conventional heater generally employs an electric heating element A and a protective tube B that covers the outer edge of the electric heating element A (a quartz tube or a ceramic tube is used as the protective tube). .). The heating element A described above is exposed from the two opening ends of the protective tube B, and a tangential end D is formed. Both sides of the opening end of the protective tube B are fixed by a fixing member C, and the whole structure is sealed. Conventional heaters are widely used in household appliances and in the mechanical field where heating is necessary.

  However, when this type of heater is applied to the heating of an atmospheric furnace or an exhaust gas treatment device, since the gas sealing structure is not attached to both sides of the protective tube, There is a drawback that gas penetrates into the protective tube from both sides of the protective tube, and the heating element in the protective tube is damaged by erosion or is adversely affected by inappropriate reaction.

As a means for heating the exhaust gas, for example, Japanese Patent Application Laid-Open No. 2012-250154 (hereinafter referred to as “Patent Document 1”), in an exhaust gas desulfurization apparatus, the exhaust gas is heated upstream of the exhaust gas reheating apparatus. A washable exhaust gas heating unit for removing mist therein is described. However, Patent Document 1 does not specifically disclose countermeasures for preventing corrosion caused by exhaust gas from the heating element.
JP 2012-250154 A

  Accordingly, an object of the present invention is to provide a heater composed of a heating element and a protective tube covering the outer edge of the heating element, which has a structure capable of preventing corrosion or reaction of the heating element caused by contact with a gas such as an exhaust gas treatment device. It is to provide a heater.

  Therefore, as a result of intensive studies to solve the above problems, the present inventor can form a hermetic layer at both ends of the opening of the protective tube, thereby making the protective tube airtight, and heating element Focusing on the fact that corrosion and the like can be prevented, the present inventors have come up with the present invention.

  That is, an object of the present invention is a heater that is applied to a heating device of an atmospheric furnace or an exhaust gas treatment apparatus, and includes a heating element and a protective tube that covers an outer edge of the heating element. A tangential end is formed by being exposed from the two open ends of the protective tube, both sides of the open end of the protective tube are fixed and sealed by a fixing member, and the protective tube is hermetically sealed by an airtight layer formed at the open ends on both sides of the protective tube Thus, a heater structure is provided that can prevent the heating element in the protective tube from being damaged or adversely affected by erosion.

Thus, according to the present invention, a heater having a structure including a heating element and a protective tube covering an outer edge of the heating element,
The heating element has a tangential end exposed from two open ends of the protective tube, and both sides of the open end of the protective tube are fixed and sealed by a fixing member, and the open ends on both sides of the protective tube The heater is characterized in that an airtight layer is formed.

  The airtight layer is preferably made of a silicone gel.

  The airtight layer is preferably made of a ceramic sealing gel.

  A heat insulating layer is preferably formed on the inner end of the airtight layer.

  The configuration of the present invention is as described above, and the corrosion of the heating element caused by contact with exhaust gas or the like is prevented, so that the operation of the heater is facilitated and the service life can be significantly prolonged. .

FIG. 1 is a cross-sectional view showing a conventional heater. FIG. 2 is a cross-sectional view showing a heater according to an embodiment of the present invention.

Hereinafter, a heater according to an embodiment of the present invention will be described with reference to the drawings. Note that the present invention is not limited thereby.
Please refer to FIG. As shown in FIG. 2, the structure of the heater according to an embodiment of the present invention is applied to a heating device of an atmosphere furnace or an exhaust gas treatment device, and a heating element (for example, heating wire) 10 and an outer edge of the heating element 10 are provided. And a protective tube 11 (a quartz tube is generally adopted as the protective tube 11). The aforementioned heating element 10 has a tangential end 13 exposed from two open ends of the protective tube 11. Both sides of the opening end of the protection tube 11 are fixed and sealed by fixing members (for example, washers and nuts) 12, and the protection tube 11 is made airtight by an airtight layer 14 provided at the opening ends on both sides of the protection tube 11. When the heater of the present embodiment is applied to an atmospheric furnace or an exhaust gas treatment apparatus and is heated, an airtight structure composed of an airtight layer 14 is provided on both sides of the protective tube 11. Gas or exhaust gas from the exhaust gas treatment apparatus does not penetrate into the protective tube 11 from both sides of the protective tube. Therefore, it is possible to prevent the heating element 10 in the protective tube 11 from being damaged by erosion or adversely affected by the reaction.

  The hermetic layer 14 of the heater structure according to this embodiment is preferably made of a silicone gel in a low temperature environment or a ceramic sealing gel in a high temperature environment.

  It is preferable that the heat insulation layer 15 is formed in the inner end of the airtight layer 14 which concerns on this embodiment.

  Although the preferred embodiments of the present invention have been disclosed as described above, these are not intended to limit the present invention in any way. Various changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, the scope of the utility model registration request according to the present invention should be broadly interpreted including such changes and modifications.

A Heating element B Protection tube C Fixing member D Tangent end 10 Heating element 11 Protection tube 12 Fixing member 13 Tangent end 14 Airtight layer 15 Heat insulation layer

Claims (4)

A heater having a structure including a heating element and a protective tube covering an outer edge of the heating element,
The heating element has a tangential end exposed from two open ends of the protective tube;
Both sides of the opening end of the protective tube are fixed and sealed by a fixing member,
An airtight layer is formed at the open ends on both sides of the protective tube.   The heater according to claim 1, wherein the airtight layer is made of silicone gel.   The heater according to claim 1, wherein the airtight layer is made of a ceramic sealing gel. The heater according to claim 1, wherein a heat insulating layer is formed at an inner end of the hermetic layer.

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