Kiln thermocouple protection device

Abstract

The utility model belongs to the technical field of temperature measuring devices, and particularly relates to a kiln thermocouple protection device, which comprises a sleeve for fixing a thermocouple body, a hollow interlayer is arranged on the sleeve, solid particles with sinterability are filled in the hollow interlayer, and the sleeve has a double-layer structure through the hollow interlayer. The solid particles filled in the hollow interlayer are sintered into a stable integral structure through high temperature of molten glass in the kiln body, the sleeve cannot collapse, a certain temperature difference can be maintained in the molten glass and the sleeve, and when the sleeve is used for a long time, holes are formed in the outer layer of the sleeve and the molten glass is blocked by the sintered and formed solid particles, the sleeve cannot be damaged. The temperature in the sleeve is not obviously influenced, so that the temperature difference is not obviously changed, the temperature displayed by the thermocouple is not distorted, the service life of the temperature measuring device is prolonged, and the cost is relatively low.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature measuring devices, and in particular relates to a kiln thermocouple protection device. Background Art

[0002] In the production of substrate glass, the kiln is responsible for providing glass liquid with stable temperature, uniform composition and good melting quality for the subsequent processes.

[0003] Usually, the substrate glass furnace uses several hot spots on the top of the arch and the bottom of the pool to detect the top of the arch space temperature and the glass liquid temperature at the bottom of the pool. The furnace temperature is one of the important control indicators in the production of substrate glass. According to the temperature conditions, energy is reasonably allocated to stabilize the melting process to ensure the stability of the glass liquid quality and thus stabilize the production line yield.

[0004] The pool bottom thermocouple is inserted from the bottom of the kiln to a position of about 50mm from the glass liquid in the kiln. Due to the high temperature in the kiln, the erosion of the glass liquid, and the extremely harsh working environment, in order to protect the normal use of the thermocouple, it is protected by a high-temperature resistant and corrosion-resistant platinum-rhodium sleeve on the outside. There is a certain temperature difference between the sleeve and the glass liquid, which can be converted to the real glass liquid temperature. The price of platinum-rhodium materials is relatively expensive, and the thickness of the sleeve is usually thinner. In production, as the use time of the thermocouple increases, the high temperature, erosion and erosion of the glass liquid in the kiln will cause damage to the sleeve, which is specifically manifested as holes and collapses after the thickness of the sleeve becomes thinner. A small amount of glass liquid will penetrate into the sleeve, and the temperature difference between the sleeve and the glass liquid will be unpredictably changed. Because the sleeve cannot be replaced in the glass liquid in the kiln, the temperature displayed by the thermocouple is distorted, resulting in the inability to control the temperature of the kiln, affecting the stability of the kiln process and having a certain impact on the product yield. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a kiln thermocouple protection device, which can effectively reduce the influence of holes in the casing on the temperature displayed by the thermocouple.

[0006] The utility model comprises a sleeve for fixing a thermocouple body. A hollow interlayer is arranged on the sleeve. The hollow interlayer is filled with sinterable solid particles.

[0007] Optionally, the solid particles are in the form of powder, granules or fibers.

[0008] Optionally, the sleeve includes a head cylinder 1 and a head cylinder 2 which are sleeved together, and the space between the head cylinder 1 and the head cylinder 2 is a hollow interlayer.

[0009] Optionally, reinforcing ribs are connected between the first and second head cylinders.

[0010] Optionally, two ends of the reinforcing rib are respectively provided with a convex surface and a concave surface.

[0011] Optionally, the shape of the head ends of the head cylinder 1 and the head cylinder 2 is a rotating thin-walled structure.

[0012] Optionally, the port of the first end cylinder and the port of the second end cylinder are disc-shaped structures and are fixed by welding or fusion.

[0013] Optionally, the outer diameter of the first end cylinder is 25-50 mm and the wall thickness is 0.8-1.5 mm, and the outer diameter of the second end cylinder is 15-30 mm and the wall thickness is 0.5-1 mm.

[0014] Optionally, the lengths of the first and second head cylinders are 600-800 mm and 500-780 mm respectively.

[0015] Optionally, the sleeve and the thermocouple body are fixed by welding or screwing.

[0016] The beneficial effect of the utility model is that the sleeve has a double-layer structure through the hollow interlayer, and the solid particles filled in the hollow interlayer are sintered into a stable overall structure through the high temperature of the glass liquid in the kiln body, which will not cause the sleeve to collapse, and a certain temperature difference can be maintained between the glass liquid and the inside of the sleeve. When used for a long time, holes appear in the outer layer of the sleeve, and the glass liquid is blocked by the sintered solid particles, which will not have a significant effect on the temperature in the sleeve, so that the temperature difference will not change significantly, so that the temperature displayed by the thermocouple will not be distorted, and the service life of the temperature measuring device is extended, and the cost is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of the kiln thermocouple protection device provided by the utility model;

[0018] Figure 2 This is a usage status diagram of the kiln thermocouple protection device provided by the utility model.

[0019] In the figure: 10, casing; 11, solid particles; 12, head cylinder 1; 13, head cylinder 2; 14, reinforcing ribs; 15, disc-shaped structure; 21, thermocouple body; 22, support tube; 23, explosion-proof junction box. DETAILED DESCRIPTION

[0020] like Figure 1 and Figure 2 As shown, the utility model provides a kiln thermocouple protection device, which includes a sleeve 10 for fixing a thermocouple body 21 , a hollow interlayer is arranged on the sleeve 10 , and solid particles 11 are filled in the hollow interlayer.

[0021] Compared with the prior art, the kiln thermocouple protection device provided by the utility model has a double-layer structure of the sleeve 10 through a hollow interlayer. The solid particles 11 filled in the hollow interlayer are sintered into a stable overall structure through the high temperature of the glass liquid in the kiln body, which will not cause the sleeve 10 to collapse. A certain temperature difference can be maintained between the glass liquid and the sleeve 10. When used for a long time, holes appear in the outer layer of the sleeve 10, and the glass liquid is blocked by the sintered solid particles 11, which will not have a significant effect on the temperature in the sleeve 10, so that the temperature difference will not change significantly, so that the temperature displayed by the thermocouple will not be distorted, and the service life of the temperature measuring device is also extended, and the cost is relatively low.

[0022] It should be noted that the sleeve 10 filled with solid particles 11 can be sintered in a sintering furnace first and then installed on the kiln body. Filling the hollow interlayer with solid particles 11 makes it easier to adapt to the shape of the hollow interlayer and reduces the difficulty of processing.

[0023] In this embodiment, the solid particles 11 are in the form of powder, granules or fibers. The solid particles 11 can be made of alumina, zirconia or a mixture of these materials.

[0024] In this embodiment, the sleeve 10 includes a sleeve-type cylindrical body 12 and a sleeve-type cylindrical body 2 13, and the space between the sleeve-type cylindrical body 12 and the sleeve-type cylindrical body 2 13 is a hollow interlayer. Specifically, the inner diameter and length of the sleeve-type cylindrical body 12 are greater than the outer diameter and length of the sleeve-type cylindrical body 2 13, and the sleeve-type cylindrical body 2 13 is sleeved in the sleeve-type cylindrical body 12, and the cavity between the two is filled with solid particles 11, so that the sleeve 10 is a cylindrical structure as a whole, and the distance from the area where the thermocouple body 21 is installed inside the sleeve 10 to the glass liquid is relatively consistent, which is conducive to the stability of the temperature difference between the inside and outside of the sleeve 10.

[0025] In one embodiment, a reinforcing rib 14 is connected between the end cylinder 12 and the end cylinder 2 13. Specifically, the reinforcing rib 14, the end cylinder 12 and the end cylinder 2 13 are all made of platinum or platinum-rhodium composite material, and the reinforcing rib 14 is arranged at the inner end of the end cylinder 12 and the outer end of the end cylinder 2 13, and is fixed by welding to play a supporting role, which can reduce the probability or degree of deformation of the end of the sleeve 10 during sintering.

[0026] In one embodiment, the shape of the head ends of the head cylinder 12 and the head cylinder 2 13 is a rotating thin-walled structure, so that the shapes of the head cylinder 12 and the head cylinder 2 13 are similar to cylindrical test tubes, and the head ends of the head cylinder 12 and the head cylinder 2 13 are smoother, which helps to reduce the impact of the glass liquid.

[0027] Furthermore, a convex surface and a concave surface are respectively provided at both ends of the reinforcing rib 14, and the reinforcing rib 14 is a cylindrical structure. The convex surface and the concave surface can respectively fully fit the inner end of the head cylinder 12 and the outer end of the head cylinder 2 13 to increase the stability of the structure.

[0028] In one embodiment, the port of the head cylinder 12 and the port of the head cylinder 2 13 are disc-shaped structures 15 and are fixed by welding or fusion. The port of the head cylinder 12 is a flat ring, and the port of the head cylinder 2 13 is a ring with a right-angled edge. The port of the head cylinder 2 13 can be fitted with the port of the head cylinder 12 from all sides, or the port of the head cylinder 2 13 can be fitted with the port of the head cylinder 12 from the bottom and all sides, which plays a role in coaxial positioning of the head cylinder 12 and the head cylinder 2 13, and is easier to weld, seal and fix.

[0029] In this embodiment, the outer diameter of head cylinder one is 25-50mm and the wall thickness is 0.8-1.5mm, the outer diameter of head cylinder two is 15-30mm and the wall thickness is 0.5-1mm, and the lengths of head cylinder one and head cylinder two are 600-800mm and 500-780mm respectively; preferably, the outer diameter of head cylinder one is 30mm and the wall thickness is 1.0mm, the outer diameter of head cylinder two is 20mm and the wall thickness is 0.8mm, and the lengths of head cylinder one and head cylinder two are 700mm and 670mm respectively.

[0030] In this embodiment, the sleeve 10 and the thermocouple body 21 are fixed by welding or screwing. The thermocouple body 21 is also provided with a support tube 22 and an explosion-proof junction box 23. The existing technology is adopted here and will not be described in detail.

[0031] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0032] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A kiln thermocouple protection device, characterized in that: It includes a sleeve for fixing the thermocouple body, the sleeve is provided with a hollow interlayer, the hollow interlayer is filled with sinterable solid particles, the solid particles are powder, granular or fibrous structures, the sleeve includes a head cylinder 1 and a head cylinder 2 in a sleeve relationship, and the space between the head cylinder 1 and the head cylinder 2 is the hollow interlayer.

2. The kiln thermocouple protection device according to claim 1, characterized in that: A reinforcing rib is connected between the first and second end cylinders.

3. The kiln thermocouple protection device according to claim 2, characterized in that: The two ends of the reinforcing rib are respectively provided with a convex surface and a concave surface.

4. The kiln thermocouple protection device according to claim 2, characterized in that: The shapes of the head ends of the head cylinder 1 and the head cylinder 2 are rotating thin-wall structures.

5. The kiln thermocouple protection device according to claim 4, characterized in that: The port of the first end cylinder and the port of the second end cylinder are disc-shaped structures and are fixed by welding or fusion.

6. The kiln thermocouple protection device according to claim 5, characterized in that: The outer diameter of the first end cylinder is 25-50 mm, and the wall thickness is 0.8-1.5 mm. The outer diameter of the second end cylinder is 15-30 mm, and the wall thickness is 0.5-1 mm.

7. The kiln thermocouple protection device according to claim 6, characterized in that: The lengths of the first and second end-cap cylinders are 600-800 mm and 500-780 mm respectively.

8. The kiln thermocouple protection device according to claim 1, characterized in that: The sleeve and the thermocouple body are fixed by welding or screwing.

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