Feeding system for forming optical fiber glass leather hose in micro-pass guide plate and control method

Abstract

The invention discloses a feeding system for forming an optical fiber glass leather hose in a micro-pass guide plate and a control method, the feeding system is connected with a production line material channel, the feeding system comprises a material basin, a conveying pipeline, a feeding pipe, an overflow pipe and an air blowing pipe, and the material basin is arranged in a closed mode; the conveying pipeline is communicated with the production line material channel and the material basin; the material supply pipe is fixed on one side of the material basin and is communicated with the material basin, and the axial direction of the material supply pipe is a first direction; the overflow pipe is fixed to the side, away from the feeding pipe, of the material basin and communicates with the material basin. The air blowing pipe penetrates through the inner circumference of the feeding pipe, and the axial direction of the air blowing pipe coincides with the axial direction of the feeding pipe. When the feeding system for forming the optical fiber glass leather hose in the micro-pass guide plate is used, due to the fact that the material basin is arranged in a closed mode, generation of silicon-rich stones on the surface of the liquid level caused by volatilization of molten glass at the high temperature can be reduced, meanwhile, the molten glass on the surface can be discharged through the overflow pipe, and the production efficiency is improved. The possibility that the molten glass generates devitrified stones in the material basin is eliminated; therefore, stones and hard spots do not exist on the surface of the finally formed glass tube.

Description

Technical Field

[0001] The present application relates to the field of glass manufacturing, and in particular to a feeding system and a control method for forming an optical fiber glass tube in a micro-channel guide plate. Background Art

[0002] The main methods for forming glass tubes are Dana horizontal method, vertical down-drawing method and Vero horizontal method. Vero method is an improved method of vertical down-drawing method. Dana horizontal tube drawing method is widely used in domestic pharmaceutical glass tubes, vertical down-drawing method is widely used in domestic high borosilicate solar tubes, and the vertical down-drawing method is mostly used in the forming method of optical fiber glass skin tubes in micro-channel guide plates.

[0003] The optical fiber glass tube in the micro-channel guide plate is a special glass tube with medium to large diameter and thick wall. 2 、Al 2 O 3 The total content is higher than 82%, which belongs to high-silica glass. Silicon-rich crystallization stones are easily produced during the glass molding production process, forming stones and pitting on the surface of the glass tube. Summary of the invention

[0004] The main purpose of the present application is to provide a feeding system and control method for the molding of optical fiber glass tubes in micro-channel guide plates, aiming to solve the problem that silicon-rich crystallization stones are easily generated during the molding process of optical fiber glass tubes in micro-channel guide plates, and stones and numbness are formed on the surface of the glass tube.

[0005] To achieve the above-mentioned purpose, the present application provides a feeding system for forming optical fiber glass tubes in a micro-channel guide plate, which is connected to a material channel of a production line, and the feeding system includes a material basin, a conveying pipeline, a feeding pipe, an overflow pipe and an air blowing pipe, and the material basin is closed; the conveying pipeline connects the material channel of the production line and the material basin; the feeding pipe is fixed to one side of the material basin and is connected to the material basin, and the axial direction of the feeding pipe is a first direction; the overflow pipe is fixed to a side of the material basin away from the feeding pipe and is connected to the material basin; the air blowing pipe is penetrated through the inner circumference of the feeding pipe and its axial direction coincides with the axial direction of the feeding pipe, and the air blowing pipe passes through the material basin.

[0006] Optionally, the material basin, the conveying pipeline, the feed pipe, the overflow pipe and the air blowing pipe are all made of platinum.

[0007] Optionally, the feeding system also includes a raised pipe section, which is arranged on a side of the material basin away from the feeding pipe, and the overflow pipe is connected to the outer periphery of the raised pipe section; wherein, the first direction is the direction of gravity, and the angle between the connection part between the overflow pipe and the raised pipe section and the first direction is less than 90°.

[0008] Optionally, the inside of the basin has a main chamber and a connecting chamber which are interconnected in a first direction, and the main chamber is connected to the raised tube section through the connecting chamber; wherein, along the first direction from the main chamber to the raised tube section, the cross-sectional area of ​​the connecting chamber perpendicular to the first direction gradually decreases.

[0009] Optionally, an indirect heating body is arranged around the periphery of the material basin, and the indirect heating body is used to heat the material basin; and a heating component is arranged on the feed pipe.

[0010] Optionally, the heating assembly includes two electrode sheets, which are respectively arranged at two ends of the outer circumference of the feeding tube; wherein the two electrode sheets are used to heat the feeding tube.

[0011] Optionally, the conveying pipeline includes a first connecting pipe, a stirring pot and a second connecting pipe, the first connecting pipe is connected to the material channel of the production line; the stirring pot has an inner cavity and is connected to the first connecting pipe, and the stirring pot is used to stir the glass liquid flowing in from the first connecting pipe; the second connecting pipe connects the stirring pot with the material basin.

[0012] Optionally, a heating component is provided on the first connecting pipe, the stirring pot and the second connecting pipe.

[0013] Optionally, the second connecting tube is arranged to be inclined, and in the direction of gravity, the height of one end of the second connecting tube connected to the material basin is greater than the height of one end of the second connecting tube connected to the stirring pot.

[0014] In addition, to achieve the above-mentioned purpose, an embodiment of the present application also provides a control method, which is applied to the feeding system for optical fiber glass tube molding in the above-mentioned micro-channel guide plate, and the control method includes heating the production line material channel to a first preset temperature; heating the material basin to a second preset temperature; and heating the feeding pipe to a third preset temperature.

[0015] The embodiment of the present application proposes a feeding system for forming optical fiber glass tubes in a micro-channel guide plate. The first direction is the same as the gravity direction. The feeding pipe is located at the bottom of the material basin. When in use, the high-temperature glass liquid in the material channel of the production line is first adjusted to a suitable viscosity, and then the glass liquid flows into the material basin through the conveying pipeline and flows out through the feeding pipe at the bottom of the material basin. Under the action of the blowing pipe, the glass liquid flows out in the form of a tube from the gap between the blowing pipe and the feeding pipe. A tube drawing machine is arranged under the feeding pipe to continuously pull out the tube. After the tube is cooled, it can be cut into glass tubes of the required length. During the process, due to the closed setting of the material basin, the generation of silicon-rich stones on the liquid surface caused by the volatilization of the glass liquid at high temperature can be reduced. At the same time, the glass liquid on the surface can be discharged through the overflow pipe, eliminating the possibility of crystallization stones of the glass liquid in the material basin; thereby ensuring that there are no stones and pitting on the surface of the finally formed glass tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the feeding system of the traditional vertical down-drawing pipe method;

[0017] Figure 2 A schematic diagram of the overall structure of a feeding system for forming an optical fiber glass tube in a micro-channel guide plate provided in an embodiment of the present application;

[0018] Figure 3 A flow chart of a control method provided in an embodiment of the present application.

[0019] In the figure: 1. production line material channel; 2. material basin; 3. feed pipe; 4. overflow pipe; 5. air blowing pipe; 6. raised pipe section; 7. electrode sheet; 81. first connecting pipe; 82. stirring pot; 821. stirring shaft; 83. second connecting pipe; 9. glass tube; 10. tube drawing machine.

[0020] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0022] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] refer to Figure 1-2 The embodiment of the present application provides a feeding system and a control method for forming an optical fiber glass tube in a micro-channel guide plate, which is connected to a material channel 1 of a production line. The feeding system may include a material basin 2, a conveying pipeline, a feeding pipe 3, an overflow pipe 4 and an air blowing pipe 5. The material basin 2 is closed; the conveying pipeline connects the material channel 1 of the production line and the material basin 2; the feeding pipe 3 is fixed to one side of the material basin 2 and is connected to the material basin 2, and the axial direction of the feeding pipe 3 is a first direction; the overflow pipe 4 is fixed to a side of the material basin 2 away from the feeding pipe 3 and is connected to the material basin 2; the air blowing pipe 5 is penetrated through the inner circumference of the feeding pipe 3 and its axial direction coincides with the axial direction of the feeding pipe 3, and the air blowing pipe 5 passes through the material basin 2.

[0026] The embodiment of the present application proposes a feeding system for forming optical fiber glass tubes in a micro-channel guide plate, wherein the first direction is the same as the direction of gravity, and the feeding tube 3 is located at the bottom of the material basin 2. When in use, the high-temperature glass liquid in the material channel 1 of the production line is first adjusted to a suitable viscosity, and then the glass liquid flows into the material basin 2 through the conveying pipeline, and flows out through the feeding tube 3 at the bottom of the material basin 2. Under the action of the blowing tube 5, the glass liquid flows out in the form of a tube from the gap between the blowing tube 5 and the feeding tube 3. A tube drawing machine 10 is arranged below the feeding tube 3 to continuously pull out the tube, and the tube is cut into the required glass tube 9 after cooling. During the process, due to the closed arrangement of the material basin 2, the generation of silicon-rich stones on the liquid surface caused by the volatilization of the glass liquid at high temperature can be reduced. At the same time, the glass liquid on the surface can be discharged through the overflow pipe 4, eliminating the possibility of crystallization stones of the glass liquid in the material basin 2; thereby ensuring that there are no stones or pitting on the surface of the finally formed glass tube 9.

[0027] Specifically, compared with the conventional feeding system in which the bowl and basin are connected, the present embodiment adopts an integrated design of the feeding pipe 3 and the basin 2 to eliminate the glass crystallization problem that may be caused by the gap at the bottom of the bowl and basin in the conventional feeding system.

[0028] Among them, the viscosity of the qualified glass liquid in the material channel 1 of the production line is preferably 100Pa.S~300Pa.S, and the liquid level height fluctuation range is 0mm~1mm; among them, the viscosity of the glass liquid and the temperature are in a one-to-one correspondence, and the formula components of the glass determine this correspondence. One type of glass corresponds to a unique viscosity and temperature relationship, so the viscosity of the glass liquid can be controlled by controlling the temperature of the glass liquid.

[0029] It should be noted that the diameter of the blowing tube 5 is determined by the wall thickness of the glass tube 9 formed by tube drawing and the production volume of the feeding system. The blowing tube 5 is a detachable component, and is provided with corresponding auxiliary mechanisms for adjusting the height and eccentric position. When the specifications of the formed glass tube 9 change significantly, the blowing tube 5 can be lifted up for replacement. There are many existing solutions for the specific auxiliary mechanisms, which will not be described in detail here.

[0030] Specifically, by changing the diameter of the blowing tube 5 to change the cross-sectional area of ​​the glass liquid flowing through the feed tube 3, the glass tube 9 with different wall thicknesses can be drawn and formed. The larger the cross-sectional area, the thicker the wall thickness of the formed glass tube 9, and vice versa.

[0031] In addition, by adjusting the distance between the lower end of the blowing tube 5 and the outlet of the feeding tube 3, glass tubes 9 of different diameters can be drawn and formed. The shorter the distance, the larger the tube diameter, and vice versa. Among them, the distance between the lower end of the blowing tube 5 and the outlet of the feeding tube 3 refers to the length that the lower end of the blowing tube 5 extends out of the feeding tube 3.

[0032] Furthermore, the material basin 2, the conveying pipeline, the feed pipe 3, the overflow pipe 4 and the air blowing pipe 5 are all made of platinum. In the traditional feed system, all or part of the parts in contact with the glass liquid are made of refractory materials, and the glass liquid corrodes the refractory materials for a long time, which easily produces stones in the glass liquid. In this embodiment, all the parts in contact with the glass liquid are made of platinum utensils, eliminating the possibility of the glass liquid corroding the parts to produce stones.

[0033] It should be understood that if Figure 1 As shown, compared with the traditional glass tube drawing feeding system which adopts the combined structure of refractory material basin, barrel, blowing head and bowl, the present feeding system adopts the combined structure of material basin 2, feeding pipe 3 and blowing pipe 5, eliminates the barrel and its transmission parts in the traditional tube drawing system, eliminates the adverse effect of the barrel on the flow stability in the material basin 2, and the unstable flow has a significant impact on the change of the diameter of the formed glass tube.

[0034] refer to Figure 2 In an exemplary embodiment, the feeding system may further include a raised pipe section 6, which is arranged on the side of the material basin 2 away from the feeding pipe 3, and the overflow pipe 4 is connected to the outer periphery of the raised pipe section 6; wherein, the first direction is the direction of gravity, and the angle between the connection part between the overflow pipe 4 and the raised pipe section 6 and the first direction is less than 90°.

[0035] Specifically, after the glass liquid flows into the material basin 2 , the glass liquid gradually fills the material basin 2 until it reaches the raised pipe section 6 , and then the glass liquid on the surface can flow out of the material basin 2 from the overflow pipe 4 at the raised pipe section 6 .

[0036] Among them, when the angle between the connection part of the overflow pipe 4 and the raised pipe section 6 and the first direction is less than 90°, the overflow pipe 4 is inclined, that is, the end of the overflow pipe 4 away from the raised pipe section 6 is lower, and the glass liquid is easier to flow in the overflow pipe 4.

[0037] In addition, the end of the raised pipe section 6 away from the material basin 2 can be closed to reduce the volatilization of the glass liquid. The blowing pipe 5 can pass through the raised pipe section 6 and the supply pipe 3 at the same time. In this way, the blowing pipe 5 can move up and down without affecting the overflow process at the raised pipe section 6.

[0038] refer to Figure 2 In an exemplary embodiment, the inside of the material basin 2 has a main chamber and a connecting chamber that are interconnected in a first direction, and the main chamber is connected to the raised pipe section 6 through the connecting chamber; wherein, along the first direction from the main chamber to the raised pipe section 6, the cross-sectional area of ​​the connecting chamber perpendicular to the first direction gradually decreases.

[0039] Specifically, the cross-sectional area of ​​the connecting chamber perpendicular to the first direction gradually decreases, so that when the liquid level of the glass liquid is in the raised pipe section, the area of ​​the glass liquid surface is greatly reduced compared to when the glass liquid surface is in the material basin 2, thereby greatly reducing the volatilization area of ​​the glass liquid surface, thereby reducing the formation of silicon-rich stones on the liquid surface caused by the volatilization of the glass liquid at high temperature.

[0040] In an exemplary embodiment, an indirect heating body is disposed around the periphery of the material basin 2 , and the indirect heating body is used to heat the material basin 2 ; a heating component is disposed on the feed pipe 3 .

[0041] Specifically, the material bowl of the traditional feeding system has a heating blind spot, which makes it easy for glass surface crystallization to occur at the mouth of the material bowl. In this embodiment, an indirect heating body is arranged on the periphery of the material basin 2 to evenly heat the material basin 2, so as to even out the viscosity of the glass liquid in the material basin 2. At the same time, a heating component is arranged on the feeding pipe 3 to heat the feeding pipe 3. The material basin 2 and the feeding pipe 3 are made of platinum material with an integrated design and good thermal conductivity. In this way, there is no heating blind spot between the material basin 2 and the feeding pipe 3, eliminating the possibility of crystallization stones of the glass liquid in the heating blind spot.

[0042] The indirect heating body is a SiC rod or a SiMo rod, which performs radiation heating on the material basin 2.

[0043] refer to Figure 2 In an exemplary embodiment, the heating assembly may include two electrode sheets 7 , which are respectively disposed at two ends of the outer circumference of the feeding tube 3 ; wherein the two electrode sheets 7 are used to heat the feeding tube 3 .

[0044] Specifically, the two electrode sheets 7 and the feed tube 3 form a heating circuit, and the feed tube 3 is heated to control the temperature of the feed tube 3 and thus the viscosity of the glass liquid in the feed tube 3 .

[0045] It should be understood that the platinum material feed tube 3 here can be understood as a resistor, and the two electrode sheets 7 can be understood as resistors connected to the two ends of an external power supply, so that a heating circuit can be formed. At this time, the temperature of the glass liquid in the feed tube 3 can be controlled by adjusting the power of the heating circuit.

[0046] Furthermore, a thermocouple for displaying temperature may be welded on the outer circumference of the feed pipe 3 to facilitate accurate temperature control. There are many technologies related to how the thermocouple displays temperature, which will not be described in detail here.

[0047] It should be noted that the liquid level of the glass liquid in the material basin 2 is controlled at the convex tube section 6, the glass liquid used for tube drawing is recorded as the tube drawing amount, and the overflowed glass liquid is recorded as the overflow amount, wherein the overflow amount is 5% to 10% of the tube drawing amount, specifically 5%, 6%, 7%, 8%, 9% and 10%, etc., so that the silicon-rich stones appearing on the glass liquid surface caused by volatilization at high temperature and the glass liquid with changed components caused by volatilization can be fully discharged. During normal production, the viscosity of the glass liquid in the material basin 2 is controlled at 5000Pa.S to 8000Pa.S.

[0048] Furthermore, the outside of the feed pipe 3 is wrapped with heat-insulating refractory materials, and the viscosity of the glass liquid in the feed pipe 3 is preferably 8000 Pa.S to 10000 Pa.S.

[0049] In an exemplary embodiment, the conveying pipeline may include a first connecting pipe 81, a stirring pot 82 and a second connecting pipe 83, the first connecting pipe 81 is connected to the production line material channel 1; the stirring pot 82 has an inner cavity and is connected to the first connecting pipe 81, and the stirring pot 82 is used to stir the glass liquid flowing in from the first connecting pipe 81; the second connecting pipe 83 connects the stirring pot 82 with the material basin 2.

[0050] Specifically, the optical fiber glass tube for the micro-channel guide plate is a special glass tube 9 with a medium to large diameter and a thick wall. The total content of SiO2 and Al2O3 in the formula components is higher than 82%. The glass has a high viscosity and the stripes are not easy to eliminate. In addition to affecting the uniformity of the wall thickness of the glass tube 9, a refractive band will also be generated on the surface of the glass tube 9. In the embodiment of the present application, the glass liquid flows from the production line material channel 1 to the first connecting tube 81, and then flows from the first connecting tube 81 into the inner cavity of the stirring pot 82. The stirring pot 82 stirs the glass liquid to achieve homogenization of the glass liquid. The stirred glass liquid reaches the material basin 2 through the second connecting tube 83. Among them, the stirring pot 82 stirs the glass liquid to make it homogenous, which solves the problem of uneven glass liquid in the traditional feeding system and the appearance of stripes or refractive bands in the glass forming process, and at the same time ensures the consistency of the tube wall thickness during tube forming and drawing.

[0051] Furthermore, the outer peripheries of the first connecting pipe 81, the stirring pot 82 and the second connecting pipe 83 are installed with refractory materials for heat preservation, thereby increasing the energy utilization rate of the first connecting pipe 81, the stirring pot 82 and the second connecting pipe 83, reducing heat loss, and thus reducing production costs.

[0052] It should be understood that the stirring pot 82 is provided with relevant components for stirring the glass liquid. For example, the stirring pot 82 is provided with a stirring shaft 821, and the axial direction of the stirring shaft 821 can be the same as the direction of gravity, wherein, in the direction of gravity, the stirring pot 82 has a top and a bottom that are relatively arranged, and the stirring shaft 821 can pass through the top or the bottom and be rotatably connected to the stirring pot 82. It can be understood here that part of the structure of the stirring shaft 821 is located inside the stirring pot 82, and part of the structure is located outside the stirring pot 82. The part of the stirring shaft 821 located outside the stirring pot 82 is connected to the transmission structure, and the transmission structure drives the stirring shaft 821 to rotate around the axial direction of the stirring shaft 821. The structure of the stirring shaft 821 located inside the stirring pot 82 is provided with stirring blades, so that the transmission structure drives the stirring shaft 821 to rotate, and the stirring shaft 821 further drives the stirring blades to stir the glass liquid in the stirring pot 82 to make the glass liquid homogenous.

[0053] Specifically, the rotation speed is selected according to the viscosity of the glass liquid and the shape of the stirring blades, generally 5r / min to 50r / min. If the stirring speed is too low, the homogenization effect of the glass liquid is not good. If the stirring speed is too high, the strength and manufacturing requirements of the stirring shaft 821 are high, and the corresponding control system and manufacturing costs are also high.

[0054] In addition, in the first direction, the distance between the stirring shaft 821 and the bottom of the stirring pot 82 can be selected according to the shape of the stirring blades. Too large or too small a distance will lead to poor homogenization of the glass liquid, and is generally 10 mm to 30 mm.

[0055] Of course, the setting of the above-mentioned stirring shaft 821 is not fixed, and the axial direction of the stirring shaft 821 can also be horizontal or in other directions, so as to complete the stirring of the glass liquid in the stirring pot 82. The specific setting can be determined according to the actual situation.

[0056] In addition, the transmission structure may be a motor, and the motor is connected to the stirring shaft 821 via a coupling, so that when the motor rotates, the stirring shaft 821 can be driven to rotate around the axial direction of the stirring shaft 821 .

[0057] In an exemplary embodiment, heating components are disposed on the first connecting pipe 81 , the stirring pot 82 , and the second connecting pipe 83 .

[0058] It should be understood that the arrangement of the heating components on the first connecting tube 81, the stirring pot 82 and the second connecting tube 83 is the same as the arrangement of the heating components on the feeding tube 3. Taking the first connecting tube 81 as an example, electrode sheets 7 are arranged at both ends of the outer periphery of the first connecting tube 81.

[0059] Similarly, the outer peripheries of the first connecting pipe 81 , the stirring pot 82 and the second connecting pipe 83 are all provided with heat-insulating refractory materials and thermocouples for displaying the temperature.

[0060] The temperatures of the glass liquid in the first connecting tube 81 , the stirring pot 82 and the second connecting tube 83 can be adjusted by the heating components, thereby changing the viscosity of the glass liquid.

[0061] Specifically, the viscosity of the glass liquid in the first connecting tube 81 is preferably 100Pa.S~300Pa.S; the viscosity of the glass liquid in the stirring pot 82 is selected to be 50Pa.S~500Pa.S. For the optical fiber glass tube in the micro-guide plate produced by this feeding system, the viscosity of the glass liquid in the stirring pot 82 is preferably 150Pa.S~300Pa.S; the viscosity of the glass liquid in the second connecting tube 83 is selected to be 1000Pa.S~5000Pa.S.

[0062] In an exemplary embodiment, the second connecting pipe 83 is tilted, and in the direction of gravity, the height of one end of the second connecting pipe 83 connected to the material basin 2 is greater than the height of one end of the second connecting pipe 83 connected to the stirring pot 82 .

[0063] Specifically, the pipe connecting the stirring pot 82 and the material basin 2 mainly serves to lower the temperature of the glass liquid.

[0064] refer to Figure 3 On the basis of the above embodiment, the embodiment of the present application further provides a control method, which is applied to the feeding system for optical fiber glass tube molding in the above micro-channel guide plate. The control method can be executed by a controller, and the controller is electrically connected to the above heating component and the indirect heating body; the method may include the following steps:

[0065] S100, heating the production line channel 1 to a first preset temperature;

[0066] S200, heating the material basin 2 to a second preset temperature;

[0067] S300, heating the feed pipe 3 to a third preset temperature.

[0068] Among them, the first preset temperature, the second preset temperature and the third preset temperature can all be determined according to the viscosity range of the glass liquid temperature at the corresponding components. Specifically, the viscosity range of the glass liquid at the material channel 1 of the production line is preferably 100Pa.S~300Pa.S, the viscosity range of the glass liquid at the material basin 2 is preferably 5000Pa.S~8000Pa.S, and the viscosity range of the glass liquid at the supply pipe 3 is preferably 8000Pa.S~10000Pa.S.

[0069] In step S200, the indirect heating body on the periphery of the material basin 2 heats the material basin 2 evenly, so that the material basin 2 can even out the viscosity of the glass liquid to ensure the stability of the liquid level and molding specifications during the tube drawing and molding production.

[0070] In step S300, the feed pipe 3 is made of platinum and is equipped with a heating component, thereby eliminating the possibility of crystallization stones forming in the heating blind area of ​​the glass liquid.

[0071] Furthermore, if it is desired to eliminate the stripes and refractive bands formed on the optical fiber glass tube in the micro-channel guide plate and ensure the uniformity of the wall thickness of the glass tube 9, the structure corresponding to the stirring pot 82 can be used, and the following steps are added in sequence between step S100 and step S200:

[0072] S110, heating the first connecting pipe 81 to a fourth preset temperature;

[0073] S120, heating the stirring pot 82 to a fifth preset temperature, and stirring the glass liquid inside the stirring pot 82;

[0074] S130, heating the second connecting pipe 83 to a sixth preset temperature.

[0075] Among them, the fourth preset temperature, the fifth preset temperature and the sixth preset temperature can all be determined according to the viscosity range of the glass liquid temperature at the corresponding components. Specifically, the viscosity range of the glass liquid at the first connecting tube 81 is preferably 100Pa.S~300Pa.S, and the viscosity of the glass liquid in the stirring pot 82 is selected to be 50Pa.S~500Pa.S. For the optical fiber glass tube in the micro-guide plate produced by this feeding system, the viscosity of the glass liquid in the stirring pot 82 is preferably 150Pa.S~300Pa.S; the viscosity of the glass liquid in the second connecting tube 83 is selected to be 1000Pa.S~5000Pa.S.

[0076] In step S120, the stirring pot 82 stirs the molten glass to make it uniform, thereby solving the problems of uneven molten glass in the traditional feeding system and the appearance of stripes or refractive bands during the glass forming process, and also ensuring the consistency of the tube wall thickness during tube forming and drawing. At the same time, in the stirring pot 82, the rotation speed of the stirring shaft 821 is 5r / min to 50r / min.

[0077] Furthermore, after such arrangement, the automatic and continuous production of glass blocks can be realized, and the viscosity of the glass in all moving parts and the feeding system can be automatically and stably controlled.

[0078] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A feeding system for forming optical fiber glass tube in a micro-channel guide plate, characterized in that: Connected to the production line material channel (1), the feeding system comprises: A material basin (2), which is closed; A conveying pipeline connecting the production line material channel (1) and the material basin (2); A feed pipe (3) is fixed to one side of the material basin (2) and is in communication with the material basin (2), and the axial direction of the feed pipe (3) is a first direction; An overflow pipe (4) is fixed to a side of the material basin (2) away from the material supply pipe (3) and is in communication with the material basin (2); The air blowing pipe (5) is arranged on the inner periphery of the material supply pipe (3) and its axial direction coincides with the axial direction of the material supply pipe (3). The air blowing pipe (5) passes through the material basin (2).

2. The feeding system for forming optical fiber glass tube in micro-channel guide plate according to claim 1, characterized in that: The material basin (2), the conveying pipeline, the material supply pipe (3), the overflow pipe (4) and the air blowing pipe (5) are all made of platinum material.

3. The feeding system for forming optical fiber glass tube in micro-channel guide plate according to claim 1, characterized in that: The feeding system also includes: A raised pipe section (6) is arranged on a side of the material basin (2) away from the material supply pipe (3), and the overflow pipe (4) is connected to the outer periphery of the raised pipe section (6); The first direction is the direction of gravity, and the angle between the connection portion between the overflow pipe (4) and the raised pipe section (6) and the first direction is less than 90°.

4. The feeding system for forming optical fiber glass tube in micro-channel guide plate as claimed in claim 3, characterized in that: The inside of the material basin (2) comprises a main chamber and a connecting chamber which are connected to each other in a first direction, and the main chamber is connected to the raised pipe section (6) through the connecting chamber; Wherein, along the first direction from the main chamber to the raised tube section (6), the cross-sectional area of ​​the connecting chamber perpendicular to the first direction gradually decreases.

5. The feeding system for forming optical fiber glass tube in micro-channel guide plate according to claim 1, characterized in that: An indirect heating body is arranged around the periphery of the material basin (2), and the indirect heating body is used to heat the material basin (2); The feed pipe (3) is provided with a heating component.

6. The feeding system for forming optical fiber glass tube in micro-channel guide plate as claimed in claim 5, characterized in that: The heating assembly comprises: Two electrode sheets (7) are respectively arranged at two ends of the outer circumference of the feed pipe (3); Wherein, the two electrode sheets (7) are used to heat the feed pipe (3).

7. The feeding system for forming optical fiber glass tube in micro-channel guide plate as claimed in claim 1, characterized in that: The delivery pipeline comprises: A first connecting pipe (81) is connected to the production line channel (1); a stirring pot (82) having an inner cavity and communicating with the first connecting pipe (81), wherein the stirring pot (82) is used to stir the glass liquid flowing in from the first connecting pipe (81); The second connecting pipe (83) connects the stirring pot (82) and the material basin (2).

8. The feeding system for forming optical fiber glass tube in micro-channel guide plate as claimed in claim 7, characterized in that: The first connecting pipe (81), the stirring pot (82) and the second connecting pipe (83) are all provided with heating components.

9. The feeding system for forming optical fiber glass tube in micro-channel guide plate as claimed in claim 7, characterized in that: The second connecting pipe (83) is arranged obliquely, and in the direction of gravity, the height of one end of the second connecting pipe (83) connected to the material basin (2) is greater than the height of one end of the second connecting pipe (83) connected to the stirring pot (82).

10. A control method, characterized in that: The feeding system for forming optical fiber glass tubes in the micro-channel guide plate according to any one of claims 1 to 9, wherein the control method comprises: Heating the production line channel (1) to a first preset temperature; heating the material basin (2) to a second preset temperature; The feed pipe (3) is heated to a third preset temperature.

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