Detachable structure and method for thermocouple at bottom of substrate glass kiln pool

Abstract

The invention discloses a detachable structure and method for a thermocouple at the bottom of a substrate glass kiln, and the structure comprises a platinum alloy sleeve which is used for being inserted into a thermocouple hole; the supporting steel beam is positioned below the thermocouple hole and axially coincides with the thermocouple hole; the insulating plate is of a hollow structure, arranged at the top of the supporting steel beam and communicated with the supporting steel beam; the end part of the precious metal thermocouple penetrates through the supporting steel beam and the insulating plate in sequence and extends into the platinum alloy sleeve; and the positioning assemblies are mounted on two opposite sides of the insulating plate, and the end parts of the positioning assemblies extend into the insulating plate and abut against the outer side of the precious metal thermocouple to position the precious metal thermocouple. The sleeve made of platinum alloy is used as a protective layer of the precious metal thermocouple, so that the impact force of molten glass and the corrosion of gas in a kiln can be effectively reduced, and the precious metal thermocouple can normally and reliably perform temperature measurement operation.

Description

Technical Field

[0001] The invention belongs to the technical field of temperature measurement of a furnace melting process, and in particular relates to a detachable structure and method of a thermocouple at the bottom of a glass furnace pool. Background Art

[0002] The glass melting furnace is an important equipment in various glass processing. It is used to melt glass melt ingredients. The raw materials formulated according to the glass components are heated, melted and clarified in the kiln to make glass liquid that meets the requirements of subsequent links. In this process link, the raw materials added to the glass melting furnace from the feed port are completely converted into a molten state. At this time, the detection of the batch temperature is crucial.

[0003] The existing temperature detection technology measures the temperature by inserting a specially modified assembled thermocouple vertically upward from the bottom of the kiln when no material is added. The modification method is to install a pure platinum Pt sheath with one end closed and the other end open on the corundum tube of the assembled thermocouple. The open end of the sheath is welded to the stainless steel connecting pipe of the assembled thermocouple to form a so-called platinum sheath thermocouple. The thermocouple passes through the thermocouple hole reserved in the face brick, and the thermocouple is fixedly installed by connecting a bracket between the thermocouple connecting pipe and the steel beam.

[0004] However, the thermocouple of this installation structure is easily damaged during use, resulting in the inability to carry out temperature measurement work normally. The fundamental reason is that the glass liquid is flowing, which has a flushing effect on the pure platinum sleeve. Pure platinum is relatively soft and has insufficient impact resistance. It is easy to produce mechanical deformation and damage, and it cannot protect the assembled thermocouple. At high temperatures, the corundum tube is easy to melt and soften or even melt, causing damage to the thermocouple wire; secondly, the glass liquid carries high voltage and a large current. If the insulation of the thermocouple to the ground is not good, it is easy to produce electric shock and burn the thermocouple. After the thermocouple is damaged due to the above reasons, it is impossible to replace a new thermocouple because there is already glass liquid in the furnace and the viscosity of the glass liquid is very high, resulting in the inability to detect the process temperature. Summary of the invention

[0005] The purpose of the present invention is to provide a detachable structure and method for the thermocouple at the bottom of a glass kiln pool. On the one hand, it is used to solve the technical defect that pure platinum is relatively soft, has insufficient impact resistance, is easily damaged by mechanical deformation, and cannot protect the assembled thermocouple; on the other hand, it is used to solve the technical defect that the insulation of the thermocouple to the ground is poor, it is easy to produce electric shock and burn the thermocouple.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: On the one hand, a detachable structure of thermocouple at the bottom of a glass furnace pool is provided, comprising: Platinum alloy sheath for insertion into the thermocouple hole; A supporting steel beam, located below the thermocouple hole and axially coincident with the thermocouple hole; The insulating plate is a hollow structure, arranged on the top of the supporting steel beam and communicated with the supporting steel beam; A noble metal thermocouple, the ends of which pass through the supporting steel beam and the insulating plate in sequence and extend into a platinum alloy sheath; The positioning assembly is installed on two opposite sides of the insulating plate, and its end portion extends into the interior of the insulating plate and abuts against the outer side of the noble metal thermocouple to position the noble metal thermocouple.

[0007] Furthermore, the platinum alloy sleeve is a structure with one end open and the other end blocked, the blocked end is plugged and installed in the thermocouple hole, and the open end faces the insulating plate; The end of the noble metal thermocouple extends into the platinum alloy sleeve and is spaced from the top of the platinum alloy sleeve.

[0008] Furthermore, the distance between the top of the platinum alloy sleeve and the top of the thermocouple hole is 25-60 mm.

[0009] Furthermore, the platinum alloy sleeve has a length of 300 mm, an outer diameter of 17.5 mm, and an inner diameter of 15.5 mm.

[0010] Furthermore, the diameter of the thermocouple hole is 18 mm.

[0011] Furthermore, a corundum tube is provided on the noble metal thermocouple.

[0012] Furthermore, the supporting steel beams are symmetrically arranged, and the insulating plate is arranged between two of the supporting steel beams.

[0013] Furthermore, the positioning assembly includes a connecting pipe, one end of which extends to the inside of the insulating plate and abuts against the outside of the noble metal thermocouple to position the noble metal thermocouple, and the other end of which is connected to a flange.

[0014] Furthermore, the connecting pipe and the flange are connected by screws.

[0015] On the other hand, a method for using a detachable structure of thermocouples at the bottom of a glass furnace is provided, wherein the method is performed using the detachable structure as described above, and comprises: Installing the insulating plate to the top of the supporting steel beam so that the insulating plate, the supporting steel beam and the thermocouple hole are axially overlapped; Insert the plugged end of the platinum alloy sheath into the thermocouple hole, and the end of the noble metal thermocouple passes through the supporting steel beam and the insulating plate in sequence and extends into the platinum alloy sheath; Use the positioning assembly to position the precious metal thermocouple.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. By using a platinum alloy sleeve as a protective layer for the precious metal thermocouple, the impact force of the glass liquid and the corrosion of the gas in the kiln can be effectively reduced, thereby ensuring that the precious metal thermocouple can perform temperature measurement operations normally and reliably; secondly, through the mutual cooperation between the supporting steel beams, insulating plates and positioning components, on the one hand, the precious metal thermocouple has good insulation to the ground during use, avoiding the occurrence of thermocouple burnout problems and reducing production costs. On the other hand, due to the use of a detachable connection method, the installation and disassembly of the platinum alloy sleeve and the precious metal thermocouple are more convenient, ensuring a sustainable operation method.

[0017] 2. The plugging end design of the platinum alloy sleeve ensures a tight connection between the sleeve and the thermocouple hole, effectively preventing the thermocouple from direct contact with the harsh environment such as high temperature and corrosive gas in the kiln, thereby improving the protection performance and service life of the thermocouple; although the end of the precious metal thermocouple extends into the platinum alloy sleeve, it maintains a gap with the inner top, avoiding the wear or stress concentration problems that may be caused by direct contact between the end of the thermocouple and the top of the sleeve, and further protecting the sensitive part of the thermocouple. At the same time, the design of the gap also ensures the freedom and stability of the thermocouple in the sleeve, reduces the measurement error caused by vibration or thermal stress, and thus improves the accuracy of temperature measurement.

[0018] 3. The temperature inside the kiln is extremely high and there may be temperature fluctuations. Maintaining a certain distance can reduce the direct impact of high-temperature airflow or heat mutation on the thermocouple, thereby extending the service life of the thermocouple and improving its stability.

[0019] 4. The length of 300mm provides enough insertion depth for the thermocouple, ensuring that the thermocouple can be stably fixed in the thermocouple hole of the kiln, reducing the deviation or looseness caused by vibration or thermal stress. At the same time, the longer sleeve also increases the contact area with the thermocouple hole and improves the stability of the connection. The design of 17.5mm outer diameter and 15.5mm inner diameter ensures that the sleeve has sufficient wall thickness to withstand high temperature and corrosive environment, and ensures that the thermocouple has enough space in the sleeve for heat conduction. The thicker wall thickness improves the high temperature resistance and corrosion resistance of the sleeve and prolongs its service life; while the appropriate inner diameter ensures good contact between the thermocouple and the sleeve, reduces heat loss and improves heat conduction efficiency.

[0020] 5. The diameter of the thermocouple hole is slightly larger than the outer diameter of the platinum alloy sheath, so that the sheath forms a tight fit when inserted into the thermocouple hole, reducing heat loss or gas penetration caused by excessive gaps. At the same time, it will not cause installation difficulties or damage to the sheath due to too small a gap.

[0021] 6. The connecting tube extends directly into the inside of the insulating plate and is in close contact with the outside of the precious metal thermocouple, ensuring the precise positioning of the thermocouple in the axial and radial directions. It reduces the positional deviation of the thermocouple caused by vibration, thermal stress or air flow disturbance, and ensures the stability and accuracy of temperature measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A cross-sectional view of the detachable structure of the thermocouple at the bottom of the glass furnace pool provided by the present invention; Figure 2 A flow chart of the method for using the detachable thermocouple structure at the bottom of a glass furnace provided by the present invention; Among them: 1. Platinum alloy sleeve; 2. Precious metal thermocouple; 3. Insulation board; 4. Support steel beam; 5. Connecting pipe; 6. Flange. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The glass melting furnace is an important equipment in various glass processing. It is used to melt glass melt ingredients. The raw materials formulated according to the glass components are heated, melted and clarified in the kiln to make glass liquid that meets the requirements of subsequent links. In this process link, the raw materials added to the glass melting furnace from the feed port are completely converted into a molten state. At this time, the detection of the batch temperature is crucial.

[0031] The existing temperature detection technology measures the temperature by inserting a specially modified assembled thermocouple vertically upward from the bottom of the kiln when no material is added. The modification method is to install a pure platinum Pt sheath with one end closed and the other end open on the corundum tube of the assembled thermocouple. The open end of the sheath is welded to the stainless steel connecting pipe of the assembled thermocouple to form a so-called platinum sheath thermocouple. The thermocouple passes through the thermocouple hole reserved in the face brick, and the thermocouple is fixedly installed by connecting a bracket between the thermocouple connecting pipe and the steel beam.

[0032] However, the thermocouple of this installation structure is easily damaged during use, resulting in the inability to carry out temperature measurement work normally. The fundamental reason is that the glass liquid is flowing, which has a flushing effect on the pure platinum sleeve. Pure platinum is relatively soft and has insufficient impact resistance. It is easy to produce mechanical deformation and damage, and it cannot protect the assembled thermocouple. At high temperatures, the corundum tube is easy to melt and soften or even melt, causing damage to the thermocouple wire; secondly, the glass liquid carries high voltage and a large current. If the insulation of the thermocouple to the ground is not good, it is easy to produce electric shock and burn the thermocouple. After the thermocouple is damaged due to the above reasons, it is impossible to replace a new thermocouple because there is already glass liquid in the furnace and the viscosity of the glass liquid is very high, resulting in the inability to detect the process temperature.

[0033] In order to solve the above technical defects, the inventor provides a detachable structure and method for the thermocouple at the bottom of a substrate glass kiln.

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings: like Figure 1 As shown, in the first aspect of this embodiment, a detachable thermocouple structure for the bottom of a glass kiln pool is provided, which includes a platinum alloy sleeve 1 made of PtRh10 platinum alloy, and the platinum alloy sleeve 1 is used to be inserted into the thermocouple hole reserved on the facing brick; a supporting steel beam 4 is placed on the ground and is located below the thermocouple hole and coincides with the axial direction of the thermocouple hole; an insulating plate 3 is a hollow structure, which is arranged on the top of the supporting steel beam 4 and is connected to the supporting steel beam 4; the precious metal thermocouple 2 is a precious metal thermocouple B-grade II thermocouple, and its ends pass through the supporting steel beam 4 and the insulating plate 3 in turn, and extend into the platinum alloy sleeve 1; a positioning component is installed on opposite sides of the insulating plate 3, and its ends extend to the inside of the insulating plate 3 and abut against the outside of the precious metal thermocouple 2 to position the precious metal thermocouple 2. During use, taking a large-tonnage kiln as an example, by using a platinum alloy sleeve as a protective layer for the precious metal thermocouple 2, the impact force of the glass liquid and the corrosion of the gas in the kiln can be effectively reduced, thereby ensuring that the precious metal thermocouple 2 can perform temperature measurement operations normally and reliably; secondly, through the mutual cooperation between the supporting steel beam 4, the insulating plate 3 and the positioning assembly, on the one hand, the precious metal thermocouple 2 has good insulation to the ground during use, avoiding the occurrence of the problem of burning of the precious metal thermocouple 2 and reducing the production cost; on the other hand, due to the use of a detachable connection method, it is more convenient to install and disassemble the platinum alloy sleeve and the precious metal thermocouple 2, ensuring a sustainable operation method.

[0035] like Figure 1As shown, the platinum alloy sleeve 1 is a structure with one end open and the other end sealed, and its sealed end is installed in the thermocouple hole by plugging, and its open end faces the insulating plate 3. The end of the precious metal thermocouple 2 extends into the platinum alloy sleeve 1, and there is a gap with the top of the platinum alloy sleeve 1. The design of the sealed end of the platinum alloy sleeve 1 ensures a tight connection between the sleeve and the thermocouple hole, effectively preventing the high temperature, corrosive gas and other harsh environments in the kiln from directly contacting the precious metal thermocouple 2, thereby improving the protection performance and service life of the precious metal thermocouple 2; although the end of the precious metal thermocouple 2 extends into the platinum alloy sleeve 1, it is spaced from the top of the inner part, avoiding the wear or stress concentration problems that may be caused by direct contact between the end of the precious metal thermocouple 2 and the top of the platinum alloy sleeve 1, and further protecting the sensitive part of the precious metal thermocouple 2. At the same time, the design of the gap also ensures the freedom and stability of the precious metal thermocouple 2 in the platinum alloy sleeve 1, reduces the measurement error caused by vibration or thermal stress, and thus improves the accuracy of temperature measurement. As shown Figure 1 As shown, further, the distance between the top of the platinum alloy sleeve 1 and the top of the thermocouple hole is 25~60mm. Since the temperature in the kiln is extremely high and there may be temperature fluctuations, maintaining a certain distance can reduce the direct impact of high-temperature airflow or heat mutation on the precious metal thermocouple 2, thereby extending the service life of the precious metal thermocouple 2 and improving its stability. The length of the platinum alloy sleeve 1 is 300mm, the outer diameter is 17.5mm, the inner diameter is 15.5mm, and the diameter of the thermocouple hole is 18mm. The length of 300mm provides sufficient insertion depth for the precious metal thermocouple 2, ensuring that the precious metal thermocouple 2 can be stably fixed in the thermocouple hole of the kiln, reducing the displacement or looseness caused by vibration or thermal stress. At the same time, the longer platinum alloy sleeve 1 also increases the contact area with the thermocouple hole, improving the stability of the connection. The design of an outer diameter of 17.5 mm and an inner diameter of 15.5 mm ensures that the platinum alloy sleeve 1 has sufficient wall thickness to withstand high temperature and corrosive environment, and ensures that the precious metal thermocouple 2 has sufficient space for heat conduction in the platinum alloy sleeve 1. The thicker wall thickness improves the high temperature resistance and corrosion resistance of the platinum alloy sleeve 1 and prolongs its service life; while the appropriate inner diameter ensures good contact between the precious metal thermocouple 2 and the platinum alloy sleeve 1, reduces heat loss, and improves heat conduction efficiency.

[0036] A corundum tube is provided on the precious metal thermocouple 2, the supporting steel beams 4 are symmetrically arranged, and the insulating plate 3 is arranged between the two supporting steel beams 4. The positioning assembly includes a connecting pipe 5, one end of which extends to the inside of the insulating plate 3 and abuts against the outside of the precious metal thermocouple 2 to position the precious metal thermocouple 2, and the other end is connected to a flange 6, and the connecting pipe 5 and the flange 6 are connected by screws. After the kiln construction is completed, the platinum alloy sleeve 1 with the flange 6 is first closed upward, and inserted into the thermocouple hole on the face brick at one time according to the corresponding distance requirements, and the area around the flange contacting the face brick is covered with broken glass powder, and the platinum alloy sleeve 1 is installed. Place the insulating plate 3 on the supporting steel beam 4, and the precious metal thermocouple 2 passes through the rectangular strip space reserved in the middle of the insulating plate 3. After the top of the precious metal thermocouple 2 passes through the insulating plate 3, put the flange 6 on the connecting pipe 5 of the precious metal thermocouple 2, and continue to push the precious metal thermocouple 2 upward until the precious metal thermocouple 2 is completely inserted into the platinum alloy sleeve 1. At this time, the flange 6 is fixed to the stainless steel connecting pipe 5 of the precious metal thermocouple 2 by screws. The flange 6 and the precious metal thermocouple 2 are fixed together to form a whole, and the flange 6 can be placed on the two ribs on the insulating plate 3 to support the weight of the entire precious metal thermocouple 2. In the process of temperature measurement, the vertical insertion depth of the precious metal thermocouple 2 can be adjusted by the different fixed positions of the flange 6 on the connecting pipe 5. By adjusting the horizontal position of the flange 6 on the two ribs of the insulating plate 3, the left and right gaps of the precious metal thermocouple 2 in the platinum alloy sleeve 1 can be adjusted. By adjusting the gap, the precious metal thermocouple 2 can be prevented from being damaged by expansion and extrusion during the heating kiln stage. Since the precious metal thermocouple 2 and the platinum alloy sleeve 1 are separate, the flange 6 is also movable on the insulating plate 3, the precious metal thermocouple 2 and the supporting steel beam 4 are insulated, and there is a gap between the precious metal thermocouple 2 and the platinum alloy sleeve 1. In this way, this installation method avoids extrusion caused by temperature expansion and electric shock caused by poor insulation. The life of the precious metal thermocouple 2 is improved. Even if the precious metal thermocouple 2 is damaged, the precious metal thermocouple 2 can be easily removed and replaced with a new precious metal thermocouple 2, and the temperature measurement is not affected. like Figure 2 As shown, in the second aspect of this embodiment, a method for using a detachable structure of thermocouples at the bottom of a glass furnace pool is provided, the method being carried out using the detachable structure as described above, comprising: S101. Install the insulating plate to the top of the supporting steel beam, and make the insulating plate and the supporting steel beam axially overlap with the thermocouple hole; illustratively, fix two supporting steel beams 4 to the bottom of the kiln, make the gap between the two supporting steel beams 4 face the thermocouple hole, and axially overlap with the thermocouple hole; secondly, use screws to fix the bottom of the insulating plate 3 to the top of the supporting steel beam 4, so as to form an integrated supporting guide device.

[0037] S102, insert the sealed end of the platinum alloy sleeve into the thermocouple hole, and the end of the precious metal thermocouple passes through the supporting steel beam and the insulating plate in sequence and extends into the platinum alloy sleeve; illustratively, the sealed end of the platinum alloy sleeve 1 is then plugged in and installed in the thermocouple hole, and the end of the precious metal thermocouple 2 passes through the supporting steel beam 4 and the insulating plate 3 in sequence and extends into the platinum alloy sleeve 1, and the supporting steel beam 4 is used to guide and support it, and the insulating plate 3 is used to improve the insulation performance of the precious metal thermocouple 2.

[0038] S103. Use the positioning component to position the precious metal thermocouple; illustratively, to ensure that the precious metal thermocouple 2 can reliably measure temperature, use the positioning component to position it. During the positioning process, the flange 6 is fixed to the stainless steel connecting pipe 5 of the precious metal thermocouple 2 by screws. The flange 6 and the precious metal thermocouple 2 are fixed together to form a whole, and the flange 6 can be placed on the two ribs on the insulating plate 3 to support the weight of the entire precious metal thermocouple 2. During the temperature measurement process, the vertical insertion depth of the precious metal thermocouple 2 can be adjusted by the different fixed positions of the flange 6 on the connecting pipe 5. By adjusting the horizontal position of the flange 6 on the two ribs of the insulating plate 3, the left and right gaps of the precious metal thermocouple 2 in the platinum alloy sleeve 1 can be adjusted. By adjusting the gap, the precious metal thermocouple 2 can be protected from damage caused by expansion and extrusion during the heating kiln stage.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the invention.

Claims

1. A detachable thermocouple structure for the bottom of a glass furnace, characterized in that: include: A platinum alloy sleeve (1) for inserting into the thermocouple hole; A supporting steel beam (4) is located below the thermocouple hole and axially coincides with the thermocouple hole; The insulating plate (3) is a hollow structure, arranged on the top of the supporting steel beam (4) and connected to the supporting steel beam (4); A noble metal thermocouple (2), the end of which passes through the supporting steel beam (4) and the insulating plate (3) in sequence and extends into the platinum alloy sheath (1); The positioning assembly is installed on two opposite sides of the insulating plate (3), and its end portion extends into the interior of the insulating plate (3) to abut against the outside of the noble metal thermocouple (2) to position the noble metal thermocouple (2).

2. The detachable structure according to claim 1, characterized in that: The platinum alloy sleeve (1) is a structure with one end open and the other end sealed, the sealed end being plugged and installed in the thermocouple hole, and the open end facing the insulating plate (3); The end of the noble metal thermocouple (2) extends into the platinum alloy sleeve (1) and is spaced apart from the top of the platinum alloy sleeve (1).

3. The detachable structure according to claim 1 or 2, characterized in that: The distance between the top of the platinum alloy sleeve (1) and the top of the thermocouple hole is 25-60 mm.

4. The detachable structure according to claim 3, characterized in that: The platinum alloy sleeve (1) has a length of 300 mm, an outer diameter of 17.5 mm, and an inner diameter of 15.5 mm.

5. The detachable structure according to claim 1 or 2, characterized in that: The diameter of the thermocouple hole is 18 mm.

6. The detachable structure according to claim 1 or 2, characterized in that: The noble metal thermocouple (2) is provided with a corundum tube.

7. The detachable structure according to claim 1, characterized in that: The supporting steel beams (4) are symmetrically arranged, and the insulating plate (3) is arranged between two of the supporting steel beams (4).

8. The detachable structure according to claim 1, characterized in that: The positioning assembly comprises a connecting pipe (5), one end of which extends into the interior of the insulating plate (3) and abuts against the outside of the noble metal thermocouple (2) to position the noble metal thermocouple (2), and the other end of which is connected to a flange (6).

9. The detachable structure according to claim 8, characterized in that: The connecting pipe (5) and the flange (6) are connected via screws.

10. A method for using a detachable thermocouple structure at the bottom of a glass furnace, characterized in that: The method is carried out using the detachable structure according to any one of claims 1 to 9, comprising: Installing the insulating plate to the top of the supporting steel beam so that the insulating plate, the supporting steel beam and the thermocouple hole are axially overlapped; Insert the plugged end of the platinum alloy sheath into the thermocouple hole, and the end of the noble metal thermocouple passes through the supporting steel beam and the insulating plate in sequence and extends into the platinum alloy sheath; Use the positioning assembly to position the precious metal thermocouple.

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