Device for preventing thermocouple from touching heating electrode

Abstract

The utility model discloses a device for preventing a thermocouple from touching a heating electrode. The device comprises the thermocouple, a system verification couple, a plug and the heating electrode, one ends of the thermocouple and the system verification couple are connected with the plug, and the other ends penetrate through the furnace wall of the high-temperature furnace and extend into the hearth; the heating electrode is wound on the side, penetrating through the furnace wall close to the hearth, of the thermocouple; the thermocouple and the system verification couple are jointly installed in a hollow cylindrical insulating porcelain tube. The fixed end of the insulating porcelain tube is fixed on the outer side of the high-temperature furnace through a fixing device, and the free end sequentially penetrates through the furnace wall and the heating electrode from the outer side of the high-temperature furnace and extends into the hearth; and the thermocouple and the system verification couple penetrate into the fixed end of the insulating porcelain tube from the plug and extend into the hearth from the free end. According to the utility model, the insulating porcelain tube is additionally arranged, so that direct contact between the thermocouple and the heating electrode is avoided, the problem that equipment is damaged due to the fact that the thermocouple touches the heating electrode in the high-temperature furnace is fundamentally solved, and potential safety hazards of operators are avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of thermocouple, specifically relates to a device for avoiding thermocouple from touching heating electrode. BACKGROUND

[0002] Thermocouple is a kind of temperature measuring element made by utilizing thermoelectric phenomenon, is frequently used in the detection of furnace temperature in heat treatment process, and its purpose is to ensure the uniformity of temperature in heat treatment process by monitoring temperature, to ensure the product quality after heat treatment.But in the process of thermocouple dismounting, furnace temperature uniformity test, system calibration, metal thermocouple is occasionally broken down by electrode in high-temperature furnace, causing scrap accident, because thermocouple and equipment temperature control system are connected by compensation lead, once thermocouple is broken down, it can cause the damage of test patrol instrument and process instrument, and cause great hidden trouble to equipment and personal safety.The existing thermocouple device directly extends into the furnace for temperature measurement, and there is no isolation measure for heating electrode in the furnace.In actual temperature measurement, there is obviously equipment failure and safety hazard. CONTENT OF UTILITY MODEL

[0003] In view of the above-mentioned defects, the utility model aims at providing a device for avoiding thermocouple from touching heating electrode.The device isolates thermocouple from heating electrode in the furnace, ensures the temperature measurement stability of thermocouple, and also avoids the scrap of thermocouple.

[0004] To realize the above technical purpose, the following technical scheme is adopted:

[0005] A device for avoiding thermocouple from touching heating electrode, including thermocouple, system calibration couple, plug and heating electrode;The one end of thermocouple and system calibration couple is connected with plug, and the other end extends in the furnace through the furnace wall of high-temperature furnace;The heating electrode is wound on the side of thermocouple passing through the furnace wall close to the furnace;Thermocouple and system calibration couple are jointly installed in the hollow cylindrical insulating porcelain tube;The fixed end of insulating porcelain tube is fixed on the outside of high-temperature furnace by fixing device, and the free end extends in the furnace from the outside of high-temperature furnace through furnace wall and heating electrode;Thermocouple and system calibration couple extend in the furnace from the fixed end of insulating porcelain tube and from the free end.

[0006] Further, the upper side and the lower side of the fixing device are respectively provided with fastening threads, and the fastening threads are used for bolt to pass through and fix the insulating porcelain tube by bolt, to prevent the insulating porcelain tube from falling off and protect the thermocouple.

[0007] Further, the fixing device is fixed on the outside of high-temperature furnace by welding.

[0008] Further, the fixing device is a hollow structure, and the inside is for the insulating porcelain tube to pass through.

[0009] Further, the remaining space in the insulating porcelain tube is filled with heat insulation asbestos except the thermocouple and system calibration couple.

[0010] Further, the insulating porcelain tube is made of corundum.

[0011] Further, the ends of the thermocouple and system calibration couple extending in the hearth are tied together by iron wire.

[0012] Further, the thermocouple has a diameter of Φ6mm, and the system calibration couple has a diameter of Φ3mm.

[0013] Further, the high-temperature furnace wall is composed of refractory bricks and heat insulation asbestos, the heat insulation asbestos is located close to the hearth, and the refractory bricks are located outside the heat insulation asbestos.

[0014] The utility model has the advantages of:

[0015] Compared with the prior art, the utility model adds the insulating porcelain tube and the fixing device of the insulating porcelain tube. The insulating porcelain tube is sleeved on the outer layer of the thermocouple and the system calibration couple, the insulating porcelain tube penetrates through the furnace wall and the heating electrode, the thermocouple is measured from the insulating porcelain tube, the thermocouple is effectively isolated from the heating electrode, and the heat insulation asbestos is filled in the insulating porcelain tube to further reduce the possibility of breakdown of the thermocouple. The problem of direct contact between the thermocouple and the heating electrode is fundamentally solved, thereby avoiding the damage of working current to the thermocouple, the temperature control meter and the recorder, reducing the purchase cost of instruments and meters, improving the design defects of the heating furnace in terms of safety, and avoiding the safety hazards of the operator. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be described below in combination with the drawings.

[0017] Figure 1 is a device for avoiding the thermocouple from contacting the heating electrode according to the utility model. Figure 1

[0018] Figure 2 is a device for avoiding the thermocouple from contacting the heating electrode according to the utility model. Figure 2 Figure 3 is a device for avoiding the thermocouple from contacting the heating electrode according to the utility model. Figure 1 Figure 4 is a local enlarged view of A shown in figure 3.

[0019] Figure 5 is a device for avoiding the thermocouple from contacting the heating electrode according to the utility model. Figure 3 Figure 6 is a free end cross-sectional view of the insulating porcelain tube according to the utility model.

[0020] In the figure: 1, thermocouple; 2, system calibration couple; 3, plug; 4, heating electrode; 5, insulating porcelain tube; 51, heat insulation asbestos; 501, fixed end; 502, free end; 6, fixing device; 601, fastening thread; 7, furnace wall; 701, refractory brick; 702, heat insulation asbestos; 8, hearth. DETAILED DESCRIPTION

[0021] ​The following specific embodiments illustrate the embodiments of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosed content. The described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] As shown in Figures 1-3 The device for avoiding the thermocouple from contacting the heating electrode comprises a thermocouple 1, a system calibration couple 2, a plug 3, a heating electrode 4 and an insulating porcelain tube 5.

[0023] One end of the thermocouple 1 and the system calibration couple 2 is connected with the plug 3 and is jointly installed in the hollow cylindrical insulating porcelain tube 5 at the plug 3, so as to avoid the direct contact between the thermocouple 1 and the heating electrode 4 in the furnace chamber 8; the fixed end 501 of the insulating porcelain tube 5 is fixed on the outside of the high-temperature furnace through the fixing device 6, and the free end 502 extends into the furnace chamber 8 from the outside of the high-temperature furnace through the furnace wall 7 and the heating electrode 4 in sequence; the free end 502 of the insulating porcelain tube 5 extends out the thermocouple 1 with a diameter of Φ6mm and the system calibration couple 2 with a diameter of Φ3mm, and the end part of the extended thermocouple 1 and system calibration couple 2 is tied together by iron wire, which protects the thermocouple 1 and ensures the uniformity and stability of temperature measurement; the heating electrode 4 is wound around the thermocouple 1 passing through the side of the furnace wall 7 close to the furnace chamber 8; the plug 3 is a plug for connecting couples.

[0024] The fixing device 6 of the insulating porcelain tube 5 is a hollow structure, the inside of which is provided for the insulating porcelain tube 5 to pass through, and the upper side and the lower side of the fixing device 6 are respectively provided with fastening threads 601; the fastening threads 601 are used for the bolts to pass through and fix the insulating porcelain tube 5 by bolts, so as to prevent the insulating porcelain tube 5 from falling off and protect the thermocouple 1; the fixing device 6 is welded on the outside of the high-temperature furnace.

[0025] The material of the insulating porcelain tube 5 is corundum, and the remaining space inside the insulating porcelain tube 5 except the thermocouple 1 and the system calibration couple 2 is filled with heat-insulating asbestos 51, which further protects the thermocouple 1 and ensures the uniformity of temperature.

[0026] The furnace wall 7 of the high-temperature furnace is composed of refractory bricks 701 and heat-insulating asbestos 702, the heat-insulating asbestos 702 is located on the side close to the furnace chamber 8, and the refractory bricks 701 are located on the outside of the heat-insulating asbestos 702; the insulating porcelain tube 5 passes through the refractory bricks 701, the heat-insulating asbestos 702 and the heating electrode 4 fixed on one side of the heat-insulating asbestos 702 in sequence.

[0027] The device is installed in a high-temperature furnace, and an insulating porcelain pipe 5 is sleeved outside the thermocouple 1 and the system calibration couple 2 when in use, the insulating porcelain pipe 5 is fixed to the outer side of the high-temperature furnace through a fixing device 6, the insulating porcelain pipe 5 is extended into the hearth 8 from the outside of the furnace, direct contact between the thermocouple 1 and the heating electrode 4 is avoided, and the stability of temperature measurement of the thermocouple 1 is ensured.

[0028] Other details of the utility model are conventional technologies known by those skilled in the art.

[0029] It should be noted that the terms "comprising", "containing" or any other variant are intended to cover non-exclusive inclusions, so that the process, method, article or equipment containing a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.

[0030] The protection scope of the utility model is not limited to the technical solutions disclosed in the specific embodiments, and any modification, equivalent replacement, improvement, etc. of the above embodiments according to the technical essence of the utility model falls within the protection scope of the utility model.

Claims

1. A device for avoiding the contact between thermocouple and heating electrode, comprising a thermocouple (1), a system calibration couple (2), a plug (3) and a heating electrode (4); one end of the thermocouple (1) and the system calibration couple (2) is connected with the plug (3), and the other end extends in the furnace chamber (8) through the furnace wall (7) of the high-temperature furnace; the heating electrode (4) is wound around the thermocouple (1) passing through the side of the furnace wall (7) close to the furnace chamber (8); characterized in that: The thermocouple (1) and the system calibration couple (2) are jointly installed in the hollow cylindrical insulating porcelain tube (5); the fixed end (501) of the insulating porcelain tube (5) is fixed outside the high-temperature furnace through the fixing device (6), the free end (502) extends in the hearth (8) from the outside of the high-temperature furnace through the furnace wall (7) and the heating electrode (4) in turn; the thermocouple (1) and the system calibration couple (2) pass into the fixed end (501) of the insulating porcelain tube (5) from the plug (3) and extend in the hearth (8) from the free end (502). ​ 2. The apparatus of claim 1, wherein: The upper side and the lower side of the fixing device (6) are respectively provided with fastening threads (601), the fastening threads (601) are used for bolt passing and fixing the insulating porcelain tube (5) through bolts, preventing the insulating porcelain tube (5) from falling off and protecting the thermocouple.

3. The apparatus of claim 2, wherein: The fixing device (6) is fixed outside the high-temperature furnace through welding.

4. The apparatus of claim 3, wherein: The fixing device (6) is a hollow structure, and the inside is used for the insulating porcelain tube (5) to pass through.

5. The apparatus of claim 1, wherein: the thermocouple is positioned to avoid contact with the heated electrode. The remaining space in the insulating porcelain tube (5) is filled with heat insulation asbestos (51) except the thermocouple (1) and the system calibration couple (2).

6. A device for avoiding contact between a thermocouple and a heating electrode as claimed in claim 5, characterized in that: The material of the insulating porcelain tube (5) is corundum.

7. The apparatus of claim 1, wherein: the thermocouple is positioned to avoid contact with the heated electrode. The end part of the thermocouple (1) and the system calibration couple (2) extending in the hearth (8) is tied together by iron wire.

8. The apparatus of claim 7, wherein: The diameter of the thermocouple (1) is Φ6mm; the diameter of the system calibration couple (2) is Φ3mm.

9. A device for avoiding contact between a thermocouple and a heating electrode according to any one of claims 1-8, characterized in that: The high-temperature furnace furnace wall (7) is composed of refractory bricks (701) and heat preservation asbestos (702), the heat preservation asbestos (702) is located on the side close to the hearth (8), and the refractory bricks (701) are located outside the heat preservation asbestos (702).

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