Rapid release device for flue thermocouple

Abstract

The utility model discloses a flue thermocouple quick release device, it includes thermocouple body and quick release protection pipe, the outer wall of thermocouple body is sleeved with quick release protection pipe, and quick release protection pipe includes fastening nut, connecting pipe, metal sleeve, graphite sleeve that are sleeved in thermocouple body outer wall in proper order, and fastening nut is screwed with the outer wall of thermocouple body, and fastening nut is connected with connecting pipe through first connecting flange, and the other end of connecting pipe is connected with metal sleeve through second connecting flange, and graphite sleeve is arranged between metal sleeve and thermocouple body, and at least 2 fastening bolts are arranged between graphite sleeve and thermocouple body, and the end of fastening bolt and the outer wall of thermocouple body abut. The utility model has the advantages that: under the action of fastening nut, connecting pipe, metal sleeve, graphite sleeve, thermocouple body is placed in quick release protection pipe, and the area of direct contact with high temperature, high dust flue gas is reduced, thereby the thermocouple body is protected, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of temperature measurement technology, specifically to a quick-release device for flue gas thermocouples. Background Technology

[0002] In the silicon smelting process, the main flue serves as a crucial channel connecting the smelting furnace and the subsequent waste heat recovery system. The flue gas temperature parameters within it are of significant importance for production control and energy utilization. To achieve precise control of the smelting process and efficient heat recovery from the downstream boiler, thermocouples are installed in the main flue to monitor and collect flue gas temperature data in real time. This temperature data not only provides feedback for adjusting the smelting furnace's production parameters to ensure stable silicon smelting reactions but also provides key information for optimizing the heat recovery efficiency of the downstream waste heat boiler. It is a vital link in ensuring production continuity and improving energy utilization.

[0003] The flue gas environment within the main flue has significantly harsh characteristics, specifically: the flue gas temperature is maintained in a high-temperature range of 400-700℃ for extended periods; the flue gas emission volume is extremely large, and the flue gas velocity is high, creating a strong airflow impact; simultaneously, the flue gas carries a large amount of solid dust. This complex environment of high temperature, high speed, and high concentration of hard dust leads to the common problems of short service life and high-temperature deformation of temperature-measuring thermocouples. The longest service life of existing thermocouples is only about 60 days. Frequent failures not only cause interruptions in temperature detection, affecting the timeliness and accuracy of production control, but also require frequent shutdowns to replace thermocouples, increasing equipment maintenance costs and labor intensity, while simultaneously reducing production efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a quick-release device for flue thermocouples.

[0005] This utility model implements a flue gas thermocouple quick-release device by the following technical solution, which includes a thermocouple body and a quick-release protective tube. The quick-release protective tube is sleeved on the outer wall of the thermocouple body. The quick-release protective tube includes a fastening nut, a connecting tube, a metal sleeve, and a graphite sleeve that are sequentially sleeved on the outer wall of the thermocouple body.

[0006] The fastening nut is screwed to the outer wall of the thermocouple body, the fastening nut is connected to the connecting pipe through the first connecting flange, and the other end of the connecting pipe is connected to the metal sleeve through the second connecting flange;

[0007] A graphite sleeve is provided between the metal sleeve and the thermocouple body, and at least two fastening bolts are passed through the graphite sleeve and the thermocouple body, with the ends of the fastening bolts abutting against the outer wall of the thermocouple body.

[0008] Furthermore, the outer wall of the metal sleeve is fixed with a mounting nut that matches the fastening bolt, and the fastening bolt is screwed into the mounting nut.

[0009] Furthermore, the connecting pipe includes a first fitting, a second fitting, and an outer sleeve. The first fitting is fixedly connected to the first connecting flange, the second fitting is fixedly connected to the second connecting flange, and the outer sleeve is provided between the first fitting and the second fitting. One end of the outer sleeve is fixedly connected to the outer wall of the second fitting, and the other end of the outer sleeve is detachably connected to the outer wall of the first fitting.

[0010] Furthermore, the outer sleeve has a plurality of first threaded holes along its length, and the first pipe has a second threaded hole in its wall, with a positioning bolt passing through one of the first threaded holes and the second threaded hole.

[0011] The advantages of this utility model are as follows: Under the action of the fastening nut, connecting tube, metal sleeve, and graphite sleeve, the thermocouple body is placed inside the quick-release protective tube, reducing the area of ​​direct contact with high-temperature and high-dust flue gas, thereby protecting the thermocouple body and extending its service life; the thermocouple body is inside the graphite sleeve, with only the measuring probe exposed, and the exposed end of the temperature measuring thermocouple ensures the accuracy of temperature measurement, while extending the service life of the thermocouple body and reducing maintenance costs. The graphite sleeve reduces the contact area between the thermocouple body and the flue gas, which can effectively solve the problem of thermocouple body deformation and extend its service life.

[0012] The first and second connecting flanges facilitate the replacement of the thermocouple body and graphite sheath, making the process quick and convenient, reducing manual labor intensity, and improving work efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] In the diagram: thermocouple body 1, quick-release protective tube 2, fastening nut 2.1, connecting tube 2.2, first fitting 2.2.1, second fitting 2.2.2, outer sleeve 2.2.3, metal sleeve 2.3, graphite sleeve 2.4, first connecting flange 3, second connecting flange 4, fastening bolt 5, mounting nut 6, first threaded hole 7, second threaded hole 8, positioning bolt 9. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figure 1 As shown, the flue gas thermocouple quick-release device includes a thermocouple body 1 and a quick-release protective tube 2. The quick-release protective tube 2 is sleeved on the outer wall of the thermocouple body 1. The quick-release protective tube 2 includes a fastening nut 2.1, a connecting tube 2.2, a metal sleeve 2.3, and a graphite sleeve 2.4, which are sequentially sleeved on the outer wall of the thermocouple body 1.

[0018] The fastening nut 2.1 is screwed to the outer wall of the thermocouple body 1. The fastening nut 2.1 is connected to the connecting pipe 2.2 through the first connecting flange 3. The other end of the connecting pipe 2.2 is connected to the metal sleeve 2.3 through the second connecting flange 4.

[0019] A graphite sleeve 2.4 is provided between the metal sleeve 2.3 and the thermocouple body 1. At least two fastening bolts 5 are passed through the graphite sleeve 2.4 and the thermocouple body 1. The ends of the fastening bolts 5 abut against the outer wall of the thermocouple body 1. The metal sleeve 2.3 is installed on the outside of the graphite sleeve 2.4 and fixed by the fastening bolts 5.

[0020] The outer wall of the metal sleeve 2.3 is fixed with a mounting nut 6 that matches the fastening bolt 5, and the fastening bolt 5 and the mounting nut 6 are screwed together.

[0021] The connecting pipe 2.2 includes a first fitting 2.2.1, a second fitting 2.2.2, and an outer sleeve 2.2.3. The first fitting 2.2.1 is fixedly connected to the first connecting flange 3, and the second fitting 2.2.2 is fixedly connected to the second connecting flange 4. An outer sleeve 2.2.3 is provided between the first fitting 2.2.1 and the second fitting 2.2.2. One end of the outer sleeve 2.2.3 is fixedly connected to the outer wall of the second fitting 2.2.2, and the other end of the outer sleeve 2.2.3 is detachably connected to the outer wall of the first fitting 2.2.1. This is to facilitate the adjustment of the length of the connecting pipe 2.2 according to the length of the thermocouple body 1.

[0022] The outer tube 2.2.3 has multiple first threaded holes 7 along its length, and the first tube 2.2.1 has a second threaded hole 8 in its wall. A positioning bolt 9 passes through one of the first threaded holes 7 and the second threaded hole 8.

[0023] The specific operation process of this embodiment is as follows:

[0024] The thermocouple body 1, fastening nut 2.1, first connecting flange 3, connecting pipe 2.2, second connecting flange 4, and metal sleeve 2.3 are fixedly connected. Then, the graphite sleeve 2.4 is placed between the metal sleeve 2.3 and the thermocouple body 1. The metal sleeve 2.3 is horizontally fixed to the outer wall of the flue, so that temperature measurement can be achieved. The thermocouple is installed in the graphite sleeve 2.4, with only the measuring probe exposed, which reduces the area of ​​direct contact with high temperature and high dust flue gas, thereby protecting the thermocouple and extending its service life.

[0025] When the thermocouple body 1 needs to be replaced, it can be pulled out directly by simply removing the fastening nut 2.1. If disassembly is difficult due to high temperature deformation, the thermocouple body 1 can also be pulled out by removing the first connecting flange 3. When the graphite sleeve needs to be inspected or replaced, it can be pulled out directly by removing the second connecting flange 4 without damaging other structures and materials of the flue.

[0026] The connecting tube 2.2 can be prefabricated to different specifications of 100-300mm. When adjusting the detection depth according to the needs of the site or to match thermocouples of different lengths, it can be quickly switched for use. It can also be set to an adjustable form. For example, the connecting tube 2.2 includes a first fitting 2.2.1, a second fitting 2.2.2, and an outer tube 2.2.3. The thermocouple body 1 can be moved inside the flue by adjusting the first fitting 2.2.1 and the outer tube 2.2.3.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flue thermocouple quick release device, comprising a thermocouple body and a quick release protection tube, the outer wall of the thermocouple body is sleeved with the quick release protection tube, characterized in that, The quick-release protective tube includes a fastening nut, a connecting tube, a metal sleeve, and a graphite sleeve, which are sequentially sleeved on the outer wall of the thermocouple body. The fastening nut is screwed to the outer wall of the thermocouple body, the fastening nut is connected to the connecting pipe through the first connecting flange, and the other end of the connecting pipe is connected to the metal sleeve through the second connecting flange; A graphite sleeve is provided between the metal sleeve and the thermocouple body, and at least two fastening bolts are passed through the graphite sleeve and the thermocouple body, with the ends of the fastening bolts abutting against the outer wall of the thermocouple body.

2. The flue thermocouple quick disconnect device of claim 1, wherein, The outer wall of the metal sleeve is fixed with a mounting nut that matches the fastening bolt, and the fastening bolt is screwed into the mounting nut.

3. The flue thermocouple quick disconnect device of claim 2, wherein, The connecting pipe includes a first fitting, a second fitting, and an outer sleeve. The first fitting is fixedly connected to the first connecting flange, and the second fitting is fixedly connected to the second connecting flange. The outer sleeve is provided between the first fitting and the second fitting. One end of the outer sleeve is fixedly connected to the outer wall of the second fitting, and the other end of the outer sleeve is detachably connected to the outer wall of the first fitting.

4. The flue thermocouple quick disconnect device of claim 3, wherein, The outer tube has multiple first threaded holes along its length, and the first tube has a second threaded hole in its wall. A positioning bolt passes through one of the first threaded holes and the second threaded hole.

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