Quartz glass rod drawing device and method

Abstract

The present invention provides a quartz glass rod drawing device and method, which comprises a rod lowering mechanism, a rod fusion device and a bundling mechanism which are arranged in sequence. The rod lowering mechanism comprises a guide rail and a rod clamping device, and the rod clamping device clamps the quartz glass rod and moves it along the extension direction of the guide rail; the rod fusion device has fire heads arranged oppositely on both sides of the quartz glass rod, and the fire heads arranged oppositely on both sides are arranged on the same horizontal plane, and a quartz glass rod is arranged between the two opposite fire heads, and the quartz glass rod is melted to generate quartz glass fiber; the bundling mechanism is used to bundle the quartz glass fiber. This technical solution can realize the fiber drawing of quartz glass rods with a diameter greater than 4 mm. Under the condition of fixed stroke length and consistent output, the repetitive operation of thick rod drawing is less, which effectively reduces the waste of lead wire and tail rod, improves the quality of thick rod drawing, and effectively reduces the production cost.

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to the technical field of quartz glass fiber precursor production, and more specifically, to a quartz glass rod drawing apparatus and method. Background Art

[0002] There are currently three methods for the continuous production of quartz glass fiber: rod drawing, melt drawing and sol-gel method. Based on practicality and economic cost considerations, quartz glass fiber is produced industrially by rod drawing. The rod drawing method is to heat and melt a quartz glass rod of about φ1.8 to 4 mm, and draw wires from the molten part to form a bundle. The bundle is coated with an impregnating agent by a bunching wheel, and then pulled by a high-speed rotating wire drawing machine. The wire is continuously wound on the winding mechanism by a wire arrangement wheel to become a continuous quartz glass fiber strand.

[0003] The diameter of the quartz glass rods currently used in the rod drawing method is generally around φ1.8~4mm. Because the lead wire part and the remaining tail rod cannot participate in the production, the wire drawing yield is difficult to improve to a certain extent, and it is impossible to effectively reduce production costs and improve operating efficiency. Summary of the invention

[0004] According to the embodiments of the present disclosure, a quartz glass rod drawing device and method are provided, which realize fiber drawing of quartz glass rods with a diameter greater than 4 mm, avoid waste in the actual production of raw materials, effectively reduce production costs, and improve operating efficiency.

[0005] In a first aspect of the present disclosure, a quartz glass rod drawing device is provided. The device comprises: a rod lowering mechanism, a fire-matching rod melting device and a bundling mechanism arranged in sequence,

[0006] The rod lowering mechanism comprises a guide rail and a rod clamping device, and the quartz glass rod is clamped by the rod clamping device and moved along the extension direction of the guide rail;

[0007] The fire-matching rod melting device has fire heads arranged opposite to each other on both sides of the quartz glass rod, and the fire heads arranged opposite to each other on the two sides are arranged on the same horizontal plane.

[0008] A quartz glass rod is arranged between the two opposing burners, and the quartz glass rod is melted to generate quartz glass fiber;

[0009] The bundling mechanism is used to bundle the quartz glass fibers.

[0010] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein a plurality of quartz glass rods are arranged, and a plurality of the fire heads on each side of the fire-melting rod device are respectively arranged along the arrangement direction of the quartz glass rods, and the two opposing fire heads correspond one-to-one to the quartz glass rods.

[0011] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein an air cavity is formed on the air inlet end side of the fire head, and the air cavity extends along the arrangement direction of the plurality of fire heads, and is connected to the air cavity through the air inlet end of the fire head.

[0012] According to the aspects described above and any possible implementation, an implementation is further provided, wherein a plurality of gas pipelines are provided correspondingly at the air inlet ends of the plurality of fire heads, and the plurality of fire heads are connected to the plurality of gas pipelines one by one.

[0013] According to the above aspects and any possible implementation, there is further provided an implementation, in which a cooling liquid circulation device is provided in contact with the fire-fusing rod device.

[0014] According to the above aspects and any possible implementation, there is further provided an implementation, in which a heat insulation plate is provided at the lower end of the lower rod mechanism in the axial direction of the fire-fusing rod device.

[0015] According to the aspects described above and any possible implementation, an implementation is further provided, wherein a fire-fuse rod device support portion is extended from the heat insulation board toward the fire-fuse rod device, and the lower rod mechanism and the fire-fuse rod device are connected via the fire-fuse rod device support portion.

[0016] According to the above aspects and any possible implementation, an implementation is further provided, wherein a positioning plate is provided on the upper end surface of the heat insulation board, and the positioning plate is provided parallel to the clamping rod device.

[0017] The clamping rod device is formed with uniformly arranged clamping rod holes.

[0018] The positioning plate is formed with a positioning hole corresponding to the clamping rod hole,

[0019] The quartz glass rod passes through the positioning hole and is clamped in the rod clamping hole, and is arranged along the first direction.

[0020] In a second aspect of the present disclosure, a quartz glass rod drawing method is provided. The method comprises: using the quartz glass rod drawing device as described above, characterized in that:

[0021] The diameter of the quartz glass rod is greater than 4 mm.

[0022] According to the above aspects and any possible implementation, an implementation is further provided, comprising the following steps:

[0023] a. Rod lowering: clamping the quartz glass rod to the rod lowering mechanism so that the quartz glass rod is arranged along the first direction;

[0024] b. Melting wire: Turn on the gas switch at the fire head of the fire-fusing rod, ignite the gas ejected from the fire-fusing rod, point it to the bottom of the fused quartz glass rod, and use the wire guide to draw the wire at the molten part of the quartz glass rod;

[0025] c. Continuous wire drawing: Turn on the rod lowering mechanism switch, and then start to lower the rods, supply the quartz glass rods to the fire-melting rod device, and form quartz glass fiber raw wires through the opposite melting of the fire-melting rod device;

[0026] d. Bundling: The quartz glass fiber raw fibers are bundled into quartz glass fiber bundles in the bundling mechanism;

[0027] e: Wire collection: Use the wire winding mechanism to wind and collect the quartz glass fiber bundle.

[0028] The present invention realizes continuous quartz fiber drawing based on a rod lowering mechanism, a rod melting device and a bundling mechanism which are arranged in sequence. The rod lowering mechanism clamps the quartz glass rod and drives the quartz glass rod to move in the extension direction of the guide rail of the rod lowering mechanism. The rod melting device melts the quartz glass rod to draw out the quartz glass fiber, and then the quartz glass fiber is gathered into a bundle by the bundling mechanism.

[0029] The fire rod melting device comprises two oppositely arranged fire heads, and the quartz glass rod is arranged between the two oppositely arranged fire heads, so that the quartz glass rod is melted in opposite directions, so that the heating and melting of the quartz glass rod is more uniform, and the structure is simple, which simplifies the operation.

[0030] In particular, for thick quartz glass rods with a diameter greater than 4 mm, the uniformity of heating and melting and the degree of melting sufficiency are improved more significantly, and at the same time, the fiber quality requirements such as flying wires, curling, and fiber uniformity are significantly improved and improved. Therefore, the fiber drawing of quartz glass rods with a diameter greater than 4 mm can be achieved through the present invention. Under the condition of fixed stroke length and consistent output, the repetitive operation of thick rod drawing is less, the waste of lead wire and tail rod is effectively reduced, and the quality of thick rod drawing is improved, which effectively reduces the production cost.

[0031] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0033] Figure 1A schematic structural diagram of a quartz glass rod thick rod drawing device provided in an embodiment of the present invention is shown;

[0034] Figure 2 A partial structural schematic diagram of a quartz glass rod thick rod drawing device provided in an embodiment of the present invention is shown.

[0035] in, Figure 1 to Figure 2 The corresponding relationship between the reference numerals and component names in the figure is:

[0036] 1 rod lowering mechanism, 1-1 mounting frame, 1-2 guide rail, 1-3 slider, 1-4 motor, 1-5 motor output shaft, 1-6 gear, 1-7 rack, 1-8 limiter, 1-9 limiter, 1-10 moving plate, 1-11 thermal insulation film, 1-12 rod clamping device, 1-13 thermal insulation board, 1-14 positioning board, 1-15 positioning hole;

[0037] 2 pairs of fire-melting rods, 2-1 fire heads;

[0038] 3. Gas flow meter;

[0039] 4 first clustering assembly, 4-1 first clustering wheel, 4-2 double-headed wetting agent nozzle;

[0040] 5 second clustering assembly, 5-1 second clustering wheel, 5-2 single-head wetting agent nozzle;

[0041] 6. Wetting agent recovery tank;

[0042] 7. Wire reel;

[0043] 8. Wire winding mechanism. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0045] In addition, the term "and / or" in this article is only a description of the association relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0046] Refer to the following Figure 1 to Figure 2 The quartz glass rod thick rod drawing device and method provided by the embodiments of the present invention are described.

[0047] In this embodiment, a thick quartz glass rod is used for the wire drawing process. The thick quartz glass rod is a quartz glass rod with a diameter greater than 4 mm. Preferably, the diameter of the quartz glass rod is in the range of 4 to 10 mm.

[0048] like Figure 1 As shown, the quartz glass rod thick rod drawing device provided by the embodiment of the present invention includes a lower rod mechanism 1, a fire melting rod device 2, a gas flow meter 3, a first bundling assembly 4, a second bundling assembly 5, a wetting agent recovery tank 6, a wire arrangement wheel 7, and a wire winding mechanism 8, which are arranged in sequence from top to bottom.

[0049] The rod lowering mechanism 1 is provided with a mounting frame 1-1; a rod clamping device 1-12 is connected to the mounting frame 1-1 through a moving plate 1-10; the moving plate 1-10 moves up and down through a slider 1-3, and a guide rail 1-2 matched with the slider 1-3 is vertically mounted on the mounting frame 1-1. The quartz glass rod is clamped by the rod clamping device 1-12 and moves along the extension direction of the guide rail 1-2.

[0050] The slider 1-3 moves on the guide rail 1-2 through the motor assembly; the motor assembly includes a motor 1-4, a gear 1-6 and a rack 1-7; the motor 1-4 is arranged on the moving plate 1-10, the motor 1-4 is installed on one side of the moving plate 1-10, the motor output shaft 1-5 passes through the moving plate 1-10, and the end of the output shaft is on the other side of the moving plate 1-10; a gear 1-6 is arranged at the end of the motor output shaft 1-5, and the rack 1-7 meshing with the gear 1-6 is vertically fixed on the mounting frame 1-1; the motor 1-4 drives the gear 1-6 to move on the rack 1-7, thereby moving the moving plate 1-10 on the mounting frame 1-1.

[0051] The motor 1-4 is electrically connected to the PLC control system, and the positive and negative rotation of the motor 1-4 drives the gear 1-6 to rotate positively and negatively on the rack 1-7, thereby driving the moving plate 1-10 to move up and down. Combined with the setting of the guide rail 1-2 and the slider 1-3, the moving plate 1-10 can achieve smooth up and down movement on the mounting frame 1-1.

[0052] A limit plate 1-9 is provided below the slider 1-3 of the movable plate 1-10. The limit plate 1-9 is fixed to the side of the movable plate 1-10, and after extending in the direction of the mounting frame 1-1, it extends to the outside in the horizontal direction of the mounting frame 1-1. The stopper 1-8 matched therewith is installed on the mounting frame 1-1, and is located on the same side as the limit plate 1-9. When the limit plate 1-9 abuts against the stopper 1-8, the movable part stops moving down or up, which determines the movement displacement of the movable plate 1-10. The stopper 1-8 can move up and down according to the needs of the actual wire drawing operation to match the different displacements of the movable plate 1-10, so as to ensure that it plays a role of limiting and fixing when the wire drawing is finished.

[0053] A folded heat-insulating film 1-11 is arranged between the moving plate 1-10 and the fire-fusing rod device 2; a heat-insulating plate 1-13 is arranged at the lower end of the lower rod mechanism 1 in the axial direction of the fire-fusing rod device.

[0054] A positioning plate 1-14 is provided on the upper end surface of the heat insulation plate 1-13. The positioning plate 1-14 is arranged parallel to the rod clamping device 1-12 in the first direction. In this embodiment, the positioning plate 1-14 is arranged parallel to the rod clamping device 1-12 in the longitudinal direction. The rod clamping device 1-12 is formed with evenly arranged rod clamping holes, which are formed as blind holes, and the quartz glass rod is fixed to the rod clamping holes by using a silicone gasket; the positioning plate 1-14 is formed with positioning holes 1-15 corresponding to the rod clamping holes one by one, and the positioning holes 1-15 are set as through holes, and the quartz glass rod can move up and down through the positioning holes 1-15. The positioning holes 1-15 play a positioning role on the quartz glass rod to prevent the quartz rod from shaking significantly.

[0055] The number of the rod clamping holes at the clamping position of the rod clamping device 1-12 is 1 to 100 holes, and the center distance of the rod clamping holes is 5 to 15 mm; there are positioning holes 1-15 on the positioning plate 1-14, the number of the positioning holes 1-15 is 1 to 100 holes, and the center distance of the positioning holes 1-15 is 5 to 15 mm; the rod clamping holes and the positioning holes 1-15 correspond one to one and their centers are on the same plumb line.

[0056] When installing the quartz glass rod, the quartz glass rod passes through the positioning hole 1-15 and is clamped in the clamping hole, and is arranged along the first direction.

[0057] The heat-insulating film 1-11 is unfolded and folded during the up-and-down movement of the moving plate 1-10 to prevent the high temperature of the fire-fusing rod 2 from damaging the guide rail 1-2, the rack 1-7 and other transmission mechanisms on the mounting frame 1-1, thereby increasing the service life of the device. The heat-insulating plate 1-13 is arranged between the positioning plate 1-14 and the fire-fusing rod 2.

[0058] The quartz glass rod is melted in the fire-melting rod device 2 to produce quartz glass fiber. In this embodiment, it is preferred to process thick rods with a diameter of 4 to 10 mm.

[0059] like Figure 1 The overall structure diagram of the quartz glass rod thick rod drawing device is shown in FIG. Figure 2 The quartz glass rod rough rod drawing device shown has a fire head 2-1 on one side of a fire melting rod device 2, and the fire melting rod device 2 has fire heads 2-1 arranged opposite to each other on both sides of the quartz glass rod, and the fire heads 2-1 arranged opposite to each other on the two sides are arranged on the same horizontal plane, and the fire heads 2-1 arranged opposite to each other on the two sides are spaced a specified distance apart, and a quartz glass rod is arranged between the two opposite fire heads 2-1 to perform a quartz glass rod melting process.

[0060] In this embodiment, a plurality of quartz glass rods are arranged, and a plurality of fire heads 2-1 are arranged on each side of the fire melting rod device 2 along the arrangement direction of the quartz glass rods, and two opposing fire heads 2-1 correspond to the quartz glass rods one by one.

[0061] Thus, a certain melting zone is formed inside the two rows of burners 2-1, forming a temperature field with uniform and stable melting temperature. The thick quartz glass rod enters the melting zone driven by the lower rod mechanism 1, and the melting is more uniform and more complete, which provides a beneficial effect on the quality of subsequent wire drawing and wire drawing.

[0062] The arrangement of the burners 2-1 depends on the arrangement of the quartz glass rods. For example, in some other embodiments, the burners 2-1 can be arranged in a ring, double row, etc.

[0063] A heat insulation plate 1-13 is provided in the axial direction of the fire-fuse rod device, and a fire-fuse rod device support portion is extended from the heat insulation plate 1-13 to the fire-fuse rod device 2, and two side portions of the heat insulation plate 1-13 respectively extend to the fire-fuse rod device 2 on the corresponding sides to form an "L" shape, and the fire-fuse rod device support portion is used to connect the lower rod mechanism 1 and the fire-fuse rod device 2 to provide a stable support for the fire-fuse rod device 2.

[0064] An air cavity is formed on the air inlet side of the burner 2-1 on each side, and the air cavity extends along the arrangement direction of the multiple burners 2-1, and is connected to the air cavity through the air inlet end of the burner 2-1. The air cavity is connected to a hydrogen and oxygen gas storage and transportation device for transporting pre-mixed combustible gas into the air cavity, or hydrogen and oxygen are transported to the air cavity respectively, and the hydrogen and oxygen are mixed in the air cavity. The burner fusion rod 2 is also connected to a gas flow meter 3, and the gas flow meter 3 is connected to the air cavity.

[0065] Alternatively, in some other embodiments, a plurality of gas pipelines are formed correspondingly at the air inlet ends of the plurality of burners 2-1 on each side, and the plurality of burners 2-1 are connected to the plurality of gas pipelines one by one. The gas pipelines are connected to a combustible gas storage and delivery device such as hydrogen and oxygen to deliver premixed combustible gas to the gas pipelines.

[0066] Thus, the gas pipeline of the fire head 2-1 is arranged in an orderly and simplified manner, which is conducive to simplifying the structural layout and convenience in actual production operations.

[0067] A gas switch is arranged on the fire head 2-1 of the fire fuse rod 2, and the gas switch can be arranged on the upstream side of the gas cavity or the gas pipeline. Alternatively, the gas switch can be arranged on the downstream side of the gas cavity or the gas pipeline, and is arranged near the gas inlet end of the fire head 2-1.

[0068] A coolant circulation device is also provided on the fire-fusing rod 2, and the coolant circulation device is provided in contact with the fire-fusing rod 2. The device is provided according to the actual fire head 2-1 and the air intake structure of the fire-fusing rod 2 and the need for heat dissipation. A coolant cavity can be formed around the inner wall of the fire head 2-1, and each coolant cavity has an inlet and an outlet, which are connected to the coolant inlet and outlet pipelines. Each coolant cavity can be connected in series, so that the coolant cavity and the coolant inlet and outlet pipelines constitute a coolant circulation device around the fire head 2-1 or around the fire head 2-1, the fire head 2-1 and the connection between the air cavity / gas pipeline. Thus, the fire head 2-1 is effectively cooled to prevent the fire head 2-1 from being deformed and blocking the fire head hole due to excessive temperature. Moreover, for the melting rod structure with multiple fire heads 2-1 and oppositely arranged fire heads 2-1, the structure is simple, the control is convenient, and the cooling effect is good.

[0069] The first bundling assembly 4 and the second bundling assembly 5 constitute a bundling mechanism, which is used to bundle the quartz glass fibers. The first bundling assembly 4 is installed directly below the center point of the positioning plate 1-14, and the first bundling wheel 4-1 is provided with a plurality of bundling grooves on the opposite two side surfaces, and the quartz glass fiber strands are divided into two groups and bundled into two groups respectively through the bundling grooves on both sides.

[0070] A double-headed sizing agent nozzle 4-2 is installed above the first bunching wheel 4-1, and a sizing agent recovery tank 6 is installed below. The double-headed sizing agent nozzle 4-2 is used to make the coating more uniform and reduce the problem of poor coating effect of the inner layer fiber precursor. The sizing agent recovery tank is set to achieve the reuse of the sizing agent, which is conducive to saving production costs.

[0071] The second bundling assembly 5 is installed below the first bundling wheel 4-1, and a plurality of bundling grooves are arranged on one side surface. The quartz glass fiber precursors are bundled into a group through the bundling grooves. A single-head impregnating agent nozzle 5-2 is installed above the second bundling wheel 5-1, and an impregnating agent recovery tank 6 is installed below.

[0072] The wire arrangement wheel 7 is installed at the lower right of the second bunching wheel 5-1. The wire winding mechanism 8 is installed at the lower left of the wire arrangement wheel 7. The wire winding mechanism 7 is electrically connected to the PLC control system, and the control system adjusts the speed. The wire winding speed is adjusted according to the rise of the lower rod mechanism 1 and the descent of the clamping rod device 1-12 to prevent the generation of flying wires and broken wires. The speed of the wire winding mechanism 8 is proportional to the speed of the lower rod mechanism 1 and the speed of the clamping rod device 1-12, which can ensure that the wire winding speed does not change during the lifting process, thereby ensuring the consistency of the monofilament diameter.

[0073] In this embodiment, the wire drawing device is provided with a rod lowering mechanism 1, a fire-matching and melting rod device 2, a bunching mechanism, a wire arrangement wheel 7, and a wire winding mechanism 8 in sequence along the longitudinal direction. However, in other embodiments, the rod lowering mechanism 1, the fire-matching and melting rod device 2, a bunching mechanism, a wire arrangement wheel 7, and a wire winding mechanism 8 may also be provided in sequence along the transverse direction.

[0074] Alternatively, more than two groups of clustering components, or multiple cable arranging wheels, or a combination of clustering components and cable arranging wheels may be provided, which is not limited here.

[0075] The present invention also provides a quartz glass rod wire drawing method, which uses the quartz glass rod wire drawing device as described above, and the diameter of the quartz glass rod is greater than 4 mm.

[0076] The specific steps include:

[0077] a. Rod lowering: clamping the quartz glass rod to the rod lowering mechanism 1, so that the quartz glass rod is arranged along the first direction;

[0078] b. Melting the lead wire: turn on the gas switch of the fire head 2-1 of the fire-fusing rod device 2, ignite the gas ejected from the fire-fusing rod device 2, point it to the bottom end of the fused quartz glass rod, and use the lead rod to draw the wire at the molten part of the quartz glass rod;

[0079] c. Continuous wire drawing: Turn on the switch of the rod lowering mechanism 1, and then start to lower the rods, supply the quartz glass rods to the fire-melting rod device 2, and form quartz glass fiber raw wires through the opposite melting of the fire-melting rod device 2;

[0080] d. Bundling: The quartz glass fiber raw fibers are bundled into quartz glass fiber bundles in the bundling mechanism;

[0081] e: Wire collection: The quartz glass fiber bundle is wound and collected using the wire winding mechanism 8.

[0082] Specifically, the quartz glass rod is passed through the positioning plate 1-14, and then clamped to the small hole corresponding to the rod clamping device 1-12, and fixed at the rod clamping device 1-12 with a silicone gasket. Turn on the switch of the rod lowering mechanism 1, first raise the rod clamping device 1-12 to the program setting position, and then start to lower the rod. The rod clamping device 1-12 moves downward to drive the quartz glass rod to move downward. Turn on the gas switch of the fire head 2-1, ignite the gas sprayed from the fire melting rod device 2, adjust the flow range to 1~5cfm through the gas flow meter, and use the guide rod to draw the wire at the melting point of the quartz glass rod. The raw wire bundle is coated with the impregnant for the first time on both sides of the first bunching wheel 4-1, and the impregnant is coated for the second time after being combined at the second bunching wheel 5-1, and then the wire is arranged by the wire arrangement wheel 7, and finally wound on the wire winding mechanism 8.

[0083] Based on the above-mentioned quartz glass rod drawing device and drawing method, embodiments and comparative examples are set to verify the quality of the fiber produced by the quartz glass rod drawing process of the present invention. Each embodiment and comparative example has quartz glass rods of different diameters and the same length, and the quartz glass rods are melted by different melting rods in a counter-directional or unidirectional melting manner. The conditions of each embodiment and comparative example are shown in Table 1.

[0084] Table 1

[0085]

[0086] In Table 1, Examples 1 to 5 use a counter-fire rod melting device to counter the fused silica glass rod; Comparative Example 1 uses a unidirectional fire rod melting device to counter the fused silica glass rod. Comparative Example 2 uses a counter-fire rod melting device to counter the fused silica glass rod. Comparative Examples 3 to 7 use a unidirectional fire rod melting device to counter the fused silica glass rod.

[0087] The quartz glass rods of the embodiments and comparative examples were subjected to the process conditions of a melting temperature of 2000 degrees Celsius, a gas flow rate of 2.5 cfm in the melting rod device, and a drawing speed of 4000 r / min to produce quartz glass fiber precursors with a diameter of 7 μm.

[0088] For each embodiment and comparative example, the produced quartz glass fiber raw yarn was tested based on the quality criteria of flying yarn, uniformity and average continuous drawing length. The test results are shown in Table 2.

[0089] Table 2

[0090]

[0091] It can be seen that when the counter-fire burner 2 is used, the melting effect of the thick quartz glass rod is better.

[0092] The wire drawing of quartz glass rods with large diameters is realized. Preferably, the diameter of the quartz glass rods is 4 to 10 mm, and the quality is even better.

[0093] In this way, the frequency and number of stopping wire drawing and changing rods are reduced. Compared with the same length of quartz glass rods with a diameter of 4 to 10 mm, the same length of quartz glass rods with a diameter of 2 mm need to change rods for wire drawing about 4 to 25 times. According to practice, the consumption of the wire drawing part is reduced by multiples. For example, the consumption of the wire drawing part of the quartz glass rod with a diameter of 4 to 10 mm is reduced by about 4 to 25 times compared with the same length of quartz glass rods with a diameter of 2 mm, and the waste of raw materials is significantly reduced. In addition, the tail rod part is easier to control, and there are fewer residual tail rods.

[0094] Furthermore, the present invention can achieve simultaneous processing of multiple rods while ensuring sufficient melting of the thick rods, thereby improving production efficiency.

[0095] The present invention realizes continuous quartz fiber drawing based on a rod lowering mechanism 1, a fire-melting rod device 2, a bundling mechanism, a wire arrangement wheel 7 and a wire winding mechanism 8 which are arranged in sequence. The rod lowering mechanism 1 clamps the quartz glass rod and drives the quartz glass rod to move in the extension direction of the guide rail of the rod lowering mechanism 1. The fire-melting rod device 2 melts the quartz glass rod to draw out the quartz glass fiber. The quartz glass fiber is then gathered into a bundle by the bundling mechanism, arranged by the wire arrangement wheel 7, and finally wound on the wire winding mechanism 8.

[0096] Among them, the fire melting rod device 2 constitutes a pair of oppositely arranged fire heads 2-1, and the quartz glass rod is arranged between the two oppositely arranged fire heads 2-1, so that the quartz glass rod is melted in opposite directions, so that the heating and melting of the quartz glass rod is more uniform, and the setting structure is simple, the operation is simplified, and the production efficiency is improved.

[0097] In particular, for thick quartz glass rods with a diameter greater than 4 mm, the uniformity of heating and melting and the degree of melting are improved more significantly, and at the same time, the fiber quality requirements such as flying silk, curling, fiber uniformity, etc. are significantly improved and improved. Preferably, the diameter of the quartz glass rod is 4 to 10 mm.

[0098] Therefore, the present invention can realize fiber drawing of quartz glass rods with a diameter greater than 4 mm. When the stroke length is fixed and the output is consistent, the repetitive operation of thick rod drawing is less, the waste of lead wire and tail rod is effectively reduced, the quality of thick rod drawing is improved, and the production cost is effectively reduced.

[0099] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0100] In the description of this specification, the description of the terms "one embodiment", "some embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0101] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A quartz glass rod drawing device, characterized in that: The rod lowering mechanism, the fire-matching rod melting device and the clustering mechanism are arranged in sequence. The rod lowering mechanism comprises a guide rail and a rod clamping device, and the quartz glass rod is clamped by the rod clamping device and moved along the extension direction of the guide rail; The fire-matching rod melting device has fire heads arranged opposite to each other on both sides of the quartz glass rod, and the fire heads arranged opposite to each other on the two sides are arranged on the same horizontal plane. A quartz glass rod is arranged between the two opposing burners, the two opposing burners correspond to the quartz glass rods one by one, and the quartz glass rods are subjected to opposite melting treatment to generate quartz glass fibers; The bundling mechanism is used to bundle the quartz glass fibers; The wire drawing device can be used to draw quartz glass fiber filaments from a thick quartz glass rod with a diameter greater than 4 mm.

2. The quartz glass rod drawing device according to claim 1, characterized in that: There are multiple quartz glass rods arranged, and there are multiple fire heads on each side of the fire-melting rod device along the arrangement direction of the quartz glass rods.

3. The quartz glass rod drawing device according to claim 2, characterized in that: An air cavity is formed on the air inlet end side of the burner head, and the air cavity extends along the arrangement direction of the plurality of burners, and is connected to the air cavity through the air inlet end of the burner head.

4. The quartz glass rod drawing device according to claim 2, characterized in that: A plurality of gas pipelines are correspondingly arranged at the air inlet ends of the plurality of fire heads, and the plurality of fire heads are connected to the plurality of gas pipelines one by one.

5. The quartz glass rod drawing device according to claim 3 or 4, characterized in that: It also includes a cooling liquid circulation device, which is arranged in contact with the fire-fusing rod device.

6. The quartz glass rod drawing device according to claim 1, characterized in that: A heat insulation plate is arranged at the lower end of the rod lowering mechanism in the axial direction of the fire-fusing rod device.

7. The quartz glass rod drawing device according to claim 6, characterized in that: A fire-fuse rod support portion is extended from the heat insulation board to the fire-fuse rod, and the lower rod mechanism and the fire-fuse rod support portion are connected to each other.

8. The quartz glass rod drawing device according to claim 7, characterized in that: A positioning plate is arranged on the upper end surface of the heat insulation plate, and the positioning plate is arranged parallel to the clamping rod device. The clamping rod device is formed with uniformly arranged clamping rod holes. The positioning plate is formed with a positioning hole corresponding to the clamping rod hole, The quartz glass rod passes through the positioning hole and is clamped in the rod clamping hole, and is arranged along the first direction.

9. A method for drawing a quartz glass rod, using the quartz glass rod drawing device according to any one of claims 1 to 8, characterized in that: The diameter of the quartz glass rod is greater than 4 mm.

10. The method for drawing a quartz glass rod according to claim 9, characterized in that: The steps include: a. Rod lowering: clamping the quartz glass rod to the rod lowering mechanism so that the quartz glass rod is arranged along the first direction; b. Melting wire: Turn on the gas switch at the fire head of the fire-fusing rod, ignite the gas ejected from the fire-fusing rod, point it to the bottom of the fused quartz glass rod, and use the wire guide to draw the wire at the molten part of the quartz glass rod; c. Continuous wire drawing: Turn on the rod lowering mechanism switch, and then start to lower the rods, supply the quartz glass rods to the fire-melting rod device, and form quartz glass fiber raw wires through the opposite melting of the fire-melting rod device; d. Bundling: The quartz glass fiber raw fibers are bundled into quartz glass fiber bundles in the bundling mechanism; e: Wire collection: Use the wire winding mechanism to wind and collect the quartz glass fiber bundle.

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