Thermocouple assembly of liquid crystal substrate platinum channel and glass production device

Abstract

The utility model provides a thermocouple assembly of a liquid crystal substrate platinum channel and a glass production device, the thermocouple assembly of the liquid crystal substrate platinum channel comprises a thermocouple structure, the thermocouple structure comprises a thermocouple main body, a connecting wire and a thermocouple plug, and the thermocouple main body is electrically connected with the thermocouple plug through the connecting wire; the protective sleeve structure comprises a first protective sleeve, a second protective sleeve and a third protective sleeve, the thermocouple body is arranged in the first protective sleeve in a penetrating mode, the end, away from the connecting wire, of the thermocouple body is located outside the first protective sleeve, and the connecting position of the thermocouple body and the connecting wire is located in the second protective sleeve; the first protective sleeve is connected with the second protective sleeve, and the third protective sleeve is located on the circumferential outer side of the connecting wire. According to the technical scheme, the problems of hysteresis and errors of thermocouple measurement in the prior art are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermocouple assemblies in glass production, in particular to a thermocouple assembly for a liquid crystal substrate platinum channel and a glass production device. BACKGROUND

[0002] In the overflow method production process of TFT-LCD glass, the platinum channel is a process section through which the molten glass flows out of the kiln. In the production process of the overflow method, the platinum channel plays a role in homogenizing the glass material, adjusting the atmosphere, removing bubbles, eliminating stripes, adjusting the viscosity, and controlling the flow to form glass that meets the requirements of the forming process. The glass needs to be processed at a specific temperature environment in each part of the entire process. The temperature control method uses the platinum channel as the heating conductor, copper bars and soft connections as the main conductive connection materials, and adopts a direct heating as the main and indirect heating as the auxiliary electric heating control method. Moreover, the flow of glass flowing into the forming process needs to be precisely controlled. If it is too large, it will cause the thickness and stress of the formed glass to be out of tolerance, and even cause the forming to be blocked. If it is too small, it will cause the glass to break during the plate pulling process in the forming process, seriously affecting the operation of the entire production line. In order to achieve precise closed-loop control of the control loop, the glass in the platinum channel needs to have accurate temperatures at each process section, and temperature feedback needs to use precise temperature measuring elements B-type and R-type noble metal thermocouples.

[0003] In some existing equipment processes, the temperature measuring thermocouples of the platinum channel are directly welded on the platinum channel body. Welding on the body means that they cannot be replaced. The temperature of the platinum channel is the most important process parameter for the entire platinum channel process. In order to ensure the long-term stable operation of the equipment, a one-to-one backup method is adopted. That is, two groups of noble metal thermocouples need to be installed at each temperature measuring point. This greatly increases the manufacturing cost of the platinum channel body.

[0004] For example, the application number is 202210670595.6, and the application name is a thermocouple and a temperature measuring device. The thermocouple assembly is arranged in the sleeve assembly. Such a thermocouple measurement has hysteresis and certain errors. Practical new type content

[0005] One of the technical problems to be solved by the present application is that thermocouple measurement has hysteresis and errors.

[0006] To solve the above technical problems, the embodiment of the present application provides a thermocouple assembly of a liquid crystal substrate platinum channel, comprising: a thermocouple structure, the thermocouple structure comprising a thermocouple main body, a connecting wire and a thermocouple plug, the thermocouple main body being electrically connected with the thermocouple plug through the connecting wire; a protective sleeve structure, the protective sleeve structure comprising a first protective sleeve, a second protective sleeve and a third protective sleeve, the thermocouple main body being arranged in the first protective sleeve, one end of the thermocouple main body away from the connecting wire being located outside the first protective sleeve, a connecting position of the thermocouple main body and the connecting wire being located in the second protective sleeve, the first protective sleeve being connected with the second protective sleeve, and the third protective sleeve being located on the circumferential outer side of the connecting wire.

[0007] In some embodiments, the first protective sleeve comprises a first cylinder body having two through holes and a filling layer, and the two conductors of the thermocouple main body pass through the two through holes one by one, and the filling layer is located between the conductors and the inner walls of the through holes.

[0008] In some embodiments, the material of the first cylinder body is corundum, and the material of the filling layer is alumina powder.

[0009] In some embodiments, the side of the second protective sleeve close to the first protective sleeve has an internal thread, and the side of the first protective sleeve close to the second protective sleeve has an external thread matched with the internal thread.

[0010] In some embodiments, the second protective sleeve comprises a second cylinder body, and the thermocouple structure is partially arranged in the second protective sleeve.

[0011] In some embodiments, the second protective sleeve further comprises a sealing layer arranged between the thermocouple structure and the inner wall of the second cylinder body.

[0012] In some embodiments, the second protective sleeve is made of stainless steel, and the sealing layer is made of sealing glue or silicone.

[0013] In some embodiments, the third protective sleeve comprises a plurality of sleeve cylinders connected in a tail-to-tail overlapping manner, and the connecting wire is arranged in the plurality of sleeve cylinders.

[0014] In some embodiments, the sleeve cylinder is a conical frustum structure, and the small end of the sleeve cylinder is arranged in the through hole of the large end of the sleeve cylinder.

[0015] According to another aspect of the present application, a glass production device is also provided, which comprises a platinum channel and a thermocouple assembly, the platinum channel having a thermocouple mounting hole, and the thermocouple assembly being sealingly mounted in the thermocouple mounting hole of the platinum channel, and the thermocouple assembly being the above-mentioned thermocouple assembly of the liquid crystal substrate platinum channel.

[0016] The present application has the following beneficial effects:

[0017] By the technical scheme, the thermocouple assembly of the liquid crystal substrate platinum channel provided by the application protects the thermocouple structure through the first protective sleeve, the second protective sleeve and the third protective sleeve, improves the service life of the thermocouple structure, and enhances the ability of the thermocouple structure to resist external force. The end of the thermocouple main body away from the connecting wire is located outside the first protective sleeve, that is, the detection part is not shielded by components, and does not need heat conduction of other components, and the heat of the detected object is directly obtained, so that the accuracy of measurement of the thermocouple assembly and the reaction time of detection are improved. The technical scheme of the application effectively solves the problems of hysteresis and error in the thermocouple measurement in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 The overall result schematic diagram of the thermocouple assembly of the liquid crystal substrate platinum channel in the embodiment of the application is shown;

[0020] Figure 2 The partial enlarged schematic diagram of the thermocouple assembly of Figure 1 is shown;

[0021] Figure 3 The cross-sectional structure schematic diagram of the first protective sleeve of the thermocouple assembly of Figure 1 is shown;

[0022] Figure 4 The cross-sectional structure schematic diagram of the second protective sleeve of the thermocouple assembly of Figure 1 is shown;

[0023] Figure 5 The connection structure schematic diagram of the third protective sleeve of the thermocouple assembly of Figure 1 is shown.

[0024] Explanation of reference signs:

[0025] 10, thermocouple structure; 11, thermocouple main body; 12, connecting wire; 13, thermocouple plug; 20, protective sleeve structure; 21, first protective sleeve; 211, first barrel; 212, filling layer; 22, second protective sleeve; 221, second barrel; 222, sealing layer; 23, third protective sleeve; 30, platinum channel assembly. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be described in further detail below with reference to the drawings and embodiments. The following detailed description of the embodiments and the accompanying drawings provide exemplary explanations of the principles of the present application and are not intended to limit the scope of the present application, which can be realized in various forms other than the particular embodiments described in the specification. The present application can be implemented in many different forms and should not be construed as limited to the specific embodiments disclosed in the specification.

[0027] The present application provides these embodiments in order to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. It should be noted that, unless otherwise specified, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values set forth in these embodiments should be interpreted as merely exemplary, and not as a limitation.

[0028] It should be noted that, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is greater than or equal to two; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] In addition, "first", "second", and similar words used in the present application do not indicate any order, number, or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error. "Include" or "contain" and similar words mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0030] It should also be noted that, in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be interpreted broadly, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. When it is described that a specific device is located between a first device and a second device, there can be or can not be an intermediate device between the specific device and the first device or the second device.

[0031] All terms used in the present application are to be interpreted as having the same meaning as understood by those of ordinary skill in the art to which the present application pertains, unless otherwise specifically defined. It is also to be understood that terms such as those defined in commonly diactionary are to be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and not in an idealized or overly formal sense unless specifically so defined herein.

[0032] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the present description, where appropriate.

[0033] The following presents a detailed description of specific embodiments.

[0034] Please refer to Figures 1 to 5 The utility model provides a kind of thermocouple assembly of liquid crystal substrate platinum gold passage, it include: thermocouple structure 10 and protective sleeve structure 20.Thermocouple structure 10 includes thermocouple main body 11, connecting wire 12 and thermocouple plug 13, thermocouple main body 11 is connected with thermocouple plug 13 by connecting wire 12.Protective sleeve structure 20 includes first protective sleeve 21, second protective sleeve 22 and third protective sleeve 23, thermocouple main body 11 is arranged in first protective sleeve 21, the end of thermocouple main body 11 away from connecting wire 12 is located outside first protective sleeve 21, the connecting place of thermocouple main body 11 and connecting wire 12 is located in second protective sleeve 22, first protective sleeve 21 is connected with second protective sleeve 22, and third protective sleeve 23 is located at the circumferential outside of connecting wire 12.

[0035] Through the above technical scheme, the thermocouple assembly of liquid crystal substrate platinum gold passage provided by the embodiment, the thermocouple structure 10 is protected by the first protective sleeve 21, the second protective sleeve 22 and the third protective sleeve 23, improve the use cycle of thermocouple structure 10, strengthen the ability of thermocouple structure 10 to resist external force.The end of thermocouple main body 11 away from connecting wire 12 is located outside first protective sleeve 21, i.e. detection site is not blocked by component, and it does not need the heat conduction of other components, directly obtains the heat of the detected object, so as to improve the accuracy of thermocouple assembly measurement and the reaction time of detection.The technical scheme of the embodiment effectively solves the problems of hysteresis and error in the thermocouple measurement in the prior art.

[0036] As Figures 1 to 3As shown in the technical scheme of some embodiments, the first protective sleeve 21 comprises a first cylinder 211 with two through holes and a filling layer 212, and the two conductors of the thermocouple body 11 pass through the two through holes one by one, and the filling layer 212 is located between the conductors and the inner walls of the through holes. The two conductors pass through the two through holes one by one, so that the situation that the two conductors of the thermocouple body 11 interfere with each other is avoided. The filling layer 212 makes the two conductors not easy to displace under the action of external force, and plays a fixing role. Moreover, the filling layer 212 also has a sealing effect, so that the glass liquid cannot enter the inside of the first cylinder 211.

[0037] As shown in the technical scheme of some embodiments, Figure 3 As shown in the technical scheme of some embodiments, the material of the first cylinder 211 is corundum, and the material of the filling layer 212 is alumina powder. The material of corundum plays a good protective role for the thermocouple body 11. Since the temperature of the glass liquid is relatively high, the alumina powder has the characteristics of high temperature resistance. It should be noted that the alumina powder is heated and melted into the filling layer 212, so as to ensure the sealing effect and can withstand high temperature.

[0038] As shown in the technical scheme of some embodiments, Figure 1 As shown in the technical scheme of some embodiments, the side of the second protective sleeve 22 close to the first protective sleeve 21 has an internal thread, and the side of the first protective sleeve 21 close to the second protective sleeve 22 has an external thread matched with the internal thread. The first protective sleeve 21 and the second protective sleeve 22 are connected through threads, which on the one hand ensures the connection between the first protective sleeve 21 and the second protective sleeve 22, and on the other hand ensures that the sealing effect between the first protective sleeve 21 and the second protective sleeve 22 is good.

[0039] As shown in the technical scheme of some embodiments, Figure 1 As shown in the technical scheme of some embodiments, the second protective sleeve 22 comprises a second cylinder 221, and the thermocouple structure 10 is partially arranged in the second protective sleeve 22. The connection between the thermocouple body 11 and the connecting wire 12 is located in the second protective sleeve 22, and the setting of the second protective sleeve 22 makes the installation of the thermocouple assembly more flexible and convenient, for example, the shape and material of the second protective sleeve 22 can be set according to specific conditions.

[0040] As shown in the technical scheme of some embodiments, Figure 1 and Figure 4 As shown in the technical scheme of some embodiments, the second protective sleeve 22 further comprises a sealing layer 222, which is arranged between the thermocouple structure 10 and the inner wall of the second cylinder 221. The arrangement of the sealing layer 222 fixes the connecting wire 12 on the one hand, and prevents contaminants from entering the second protective sleeve 22 on the other hand.

[0041] As shown in the technical scheme of some embodiments, Figure 4As shown, in some embodiments, the second protective sleeve 22 is made of stainless steel, and the sealing layer 222 is made of sealant or silicone. Stainless steel provides stronger resistance to external forces, therefore it is placed on the outside of the platinum channel assembly 30. The temperature at the location of the second protective sleeve 22 is not as high as that at the location of the first protective sleeve 21, therefore the sealing layer 222 can be made of sealant or silicone.

[0042] like Figure 1 and Figure 5 As shown, in some embodiments, the third protective sleeve 23 includes multiple sleeves that overlap and connect at their ends, with the connecting wire 12 passing through the multiple sleeves. The structure of the multiple sleeves allows the third protective sleeve 23 to not only provide protection but also withstand a certain degree of deformation.

[0043] like Figure 5 As shown, in some embodiments, the sleeve has a frustum-shaped structure, with the small end of the sleeve inserted into the through hole at the large end. This structure is easy to assemble and disassemble, and convenient to use.

[0044] This application also provides a glass production apparatus, which includes a platinum channel assembly 30 and a thermocouple assembly. The platinum channel assembly 30 has a thermocouple mounting hole, and the thermocouple assembly is hermetically mounted within the thermocouple mounting hole of the platinum channel assembly 30. The thermocouple assembly is the aforementioned thermocouple assembly for a platinum channel in a liquid crystal substrate. In some embodiments, the platinum channel assembly 30 includes a platinum channel and a sleeve. Figure 2 The platinum channel assembly 30 is marked on the sleeve. The sleeve and platinum channel are connected by threads. The thermocouple assembly is inserted into the sleeve, and sealant is applied between the thermocouple assembly and the sleeve to bond them together. This ensures both a good seal and easy assembly / disassembly. The length N of the first protective sleeve 21 protruding from the sleeve is between 0.6mm and 2mm, and the length M of the thermocouple body 11 protruding from the first protective sleeve 21 is between 3mm and 6mm.

[0045] In summary, such as Figure 1 As shown, the thermocouple assembly mainly consists of four parts. The L1 segment is where the thermocouple wire (thermocouple body 11) is threaded through a first protective sleeve (first protective sleeve 21) made of corundum. Since the normal processing temperature of the platinum channel assembly 30 is very high, between 1250℃ and 1650℃, the platinum channel assembly 30 is typically placed on high-temperature resistant insulation material. Due to the special thermal properties and hardness of corundum, the front protective material of the thermocouple assembly is made of corundum to ensure the safety and durability of the protective sleeve. In some embodiments, the corundum tube diameter is 6mm to 8mm, the thickness is 1mm to 1.5mm, and the wire diameter is 0.5mm to 1mm.

[0046] L2 section is a protective sleeve (second protective sleeve 22) made of heat-resistant stainless steel. The temperature gradient on the outside of the platinum channel assembly 30 decreases rapidly, and the ambient temperature is not high. The protective sleeve made of corundum material is brittle and can easily break under external force. For example, it can break or be damaged during maintenance or installation of cooling water and electric heating copper bars. Therefore, the use of a heat-resistant stainless steel protective sleeve can greatly increase the strength of the exposed part of the thermocouple assembly.

[0047] L3 section is a flexible extension section of the thermocouple. The thermocouple extension section makes the installation position of the platinum channel thermocouple assembly more flexible. Because there are many thermocouples in the platinum channel, and the temperature measurement points are distributed closely. The platinum channel body also has many auxiliary equipment such as cooling water pipes, cooling air pipes, mixers, electric heating copper bars, and flexible connections, etc. The installation position of the thermocouple is limited, and the flexible connection section (connection lead 12) of the thermocouple can well avoid interference during installation and maintenance. Some thermocouples in the flexible connection section use hollow corundum beads with a length of 2mm to 3mm and a diameter of 2mm as insulating materials, which are sequentially connected to the connection lead 12 to achieve insulation effect. The outside of the corundum bead is protected by a high-temperature-resistant glass fiber sleeve, and is fixed firmly by a stainless steel clamp. The above-mentioned corundum bead is a sleeve, which is provided outside the sleeve.

[0048] L4 section is a thermocouple connector. The connector uses a quick-release connector, and the corresponding indexed thermocouple uses a corresponding indexed plug. In this way, when the thermocouple assembly fails and needs to be replaced, the plug can be quickly pulled out for replacement, reducing the impact on the production process.

[0049] The thermocouple assembly adopts a leakage design. The temperature measurement point of the thermocouple assembly is located at the position where the positive and negative electrodes of the thermocouple are welded. The noble metal thermocouple has two different conductors A and B forming a loop. When the two ends are connected to each other, an electromotive force will be generated in the thermocouple loop as long as the temperature at the two junctions is different. Different temperatures produce different electromotive forces, and measuring the electromotive force can indicate the temperature at the measurement point. Because the glass in the platinum channel is flowing, the real-time change of the temperature needs to be quickly responded to the control system, so as not to cause hysteresis to the electric heating control. Due to the special process requirements of the platinum channel, the temperature of the platinum channel temperature measurement point adopts a thermocouple leakage design to quickly respond to the temperature at the measurement point. When the platinum channel temperature measurement point changes, the data can be quickly fed back to the control system. In this way, the temperature of the platinum channel at the measurement point will change with the change of the electric heating control system. The thermocouple assembly is inserted through the hole reserved in the platinum channel insulation layer, so that the leakage temperature measurement point of the thermocouple is close to the platinum body of the platinum channel.

[0050] So far, the embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0051] Although some specific embodiments of the present application have been described in detail by examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be replaced equivalently without departing from the scope and spirit of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way.

Claims

1. A thermocouple assembly for a platinum channel on a liquid crystal substrate, characterized in that, include: Thermocouple structure (10) includes thermocouple body (11), connecting wire (12) and thermocouple plug (13), the thermocouple body (11) being electrically connected to the thermocouple plug (13) through the connecting wire (12); The protective sleeve structure (20) includes a first protective sleeve (21), a second protective sleeve (22), and a third protective sleeve (23). The thermocouple body (11) is inserted inside the first protective sleeve (21). The end of the thermocouple body (11) away from the connecting wire (12) is located outside the first protective sleeve (21). The connection between the thermocouple body (11) and the connecting wire (12) is located inside the second protective sleeve (22). The first protective sleeve (21) is connected to the second protective sleeve (22). The third protective sleeve (23) is located on the circumferential outer side of the connecting wire (12).

2. The thermocouple assembly for the platinum channel of the liquid crystal substrate according to claim 1, characterized in that, The first protective sleeve (21) includes a first cylindrical body (211) with two through holes and a filling layer (212). The two conductors of the thermocouple body (11) pass through the two through holes one to one, and the filling layer (212) is located between the conductors and the inner wall of the through holes.

3. The thermocouple assembly for the platinum channel of the liquid crystal substrate according to claim 2, characterized in that, The first cylindrical body (211) is made of corundum, and the filling layer (212) is made of alumina powder.

4. The thermocouple assembly for the platinum channel of the liquid crystal substrate according to claim 2, characterized in that, The second protective sleeve (22) has an internal thread on the side near the first protective sleeve (21), and the first protective sleeve (21) has an external thread that matches the internal thread on the side near the second protective sleeve (22).

5. The thermocouple assembly for the platinum channel of the liquid crystal substrate according to claim 4, characterized in that, The second protective sleeve (22) includes a second cylindrical body (221), and the thermocouple structure (10) is partially inserted inside the second protective sleeve (22).

6. The thermocouple assembly for the platinum channel of the liquid crystal substrate according to claim 5, characterized in that, The second protective sleeve (22) also includes a sealing layer (222), which is disposed between the thermocouple structure (10) and the inner wall of the second cylinder (221).

7. The thermocouple assembly for the platinum channel of the liquid crystal substrate according to claim 6, characterized in that, The second protective sleeve (22) is made of stainless steel, and the sealing layer (222) is made of sealant or silicone.

8. The thermocouple assembly for the platinum channel of the liquid crystal substrate according to any one of claims 1 to 7, characterized in that, The third protective sleeve (23) includes multiple sleeves that are connected in an overlapping manner, and the connecting wire (12) is inserted into the multiple sleeves.

9. The thermocouple assembly for the platinum channel of the liquid crystal substrate according to claim 8, characterized in that, The sleeve has a truncated cone structure, and the small end of the sleeve is inserted into the through hole at the large end of the sleeve.

10. A glass production apparatus, characterized in that, The glass production apparatus includes a platinum channel assembly (30) and a thermocouple assembly. The platinum channel assembly (30) has a thermocouple mounting hole. The thermocouple assembly is hermetically installed in the thermocouple mounting hole of the platinum channel assembly (30). The thermocouple assembly is the thermocouple assembly of the platinum channel of the liquid crystal substrate according to any one of claims 1 to 9.

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