A quartz fiber melting passive counter-roller quartz rod positioning mechanism

Abstract

The utility model relates to a quartz fiber melting passive counter roller quartz rod positioning mechanism. Its roll sending counter roller includes first, second drive rollers that drive and rotate oppositely by the drive arrangement, and the first, second drive rollers rotate and are assembled on the frame to be used for sending quartz rods along the first direction, and the first, second drive rollers are arranged in parallel in the first plane, and the first direction is perpendicular to the first plane, the positioning counter roller rotates and is assembled on the frame and includes first, second positioning rollers, and the first, second positioning rollers are arranged in parallel in the second plane, and the first, second planes are parallel, and the positioning counter roller and roll sending counter roller are sequentially arranged along the first direction to make the quartz rods pass through the positioning counter roller and roll sending counter roller in turn, and the outer surface of at least one of the first, second positioning rollers is provided with annular positioning grooves corresponding to the quartz rods. It can ensure that the quartz rod is inserted and assembled quickly, and can improve the positioning accuracy of the quartz rod as far as possible.

Description

Technical Field

[0001] This utility model relates to a passive roller positioning mechanism for quartz rods in quartz fiber melting. Background Technology

[0002] In the production of quartz glass fiber using the rod drawing method, quartz glass rods with a diameter of approximately 1.8 to 4 millimeters are heated and melted. Fibers are drawn from the molten point and bundled together. After being coated with a sizing agent by a bundling wheel, the bundles are continuously drawn by a high-speed rotating drawing machine and wound onto a winding mechanism by a wire guide wheel, becoming continuous quartz glass fiber filaments. To improve efficiency, 100 or more quartz fibers need to be drawn at a time, and the length of the quartz rod should be as long as possible (generally 1.4-1.8 meters) to reduce the number of times the quartz rod needs to be clamped. This is because after the quartz rod is melted and drawn, a new quartz rod needs to be manually loaded again. The longer the quartz rod, the fewer the clamping frequency, and the higher the drawing efficiency. However, because the diameter of the quartz rod is very thin, the longer the quartz rod is, the more easily it will wobble or bend. During the drawing process, the wobble or bend of the quartz rod will cause the position of its lower end as it passes through the molten flame area to change. Since the temperature of different areas of the flame is different, the change in the position of the quartz rod in the flame will lead to substandard melting and affect the quality of the filament.

[0003] In existing technologies, this problem is generally solved by setting up a positioning plate with positioning holes that correspond one-to-one with the quartz rods. These positioning holes are used to position the quartz rods as they pass through. However, to facilitate the smooth and quick insertion of the quartz rods into the positioning holes, the diameter of the positioning holes is generally set to be larger than that of the quartz rods. For example, a positioning hole with a diameter of about 2.7 mm is generally set for a quartz rod with a diameter of 2 mm. This results in a maximum gap of 0.7 mm between the quartz rod and the wall of the positioning hole. This gap provides sufficient room for the quartz rod to sway. The swaying of the quartz rod during the conveying process will be transmitted to its lower end, causing the lower end to change position in the flame, affecting the melting quality, and resulting in substandard quality of the drawn quartz fiber filaments.

[0004] Therefore, there is an urgent need for a new positioning technology that can both ensure rapid insertion of quartz rods and maximize the positioning accuracy of quartz rods. Utility Model Content

[0005] The purpose of this invention is to provide a passive roller positioning mechanism for quartz rods in quartz fiber melting, which can ensure rapid insertion of quartz rods and maximize the positioning accuracy of quartz rods.

[0006] The technical solution of this utility model is as follows: A passive roller positioning mechanism for quartz rods in quartz fiber melting includes:

[0007] frame;

[0008] The conveying rollers include a first and a second drive rollers that are driven to rotate in opposite directions by a drive device. The first and second drive rollers are rotatably mounted on a frame for conveying a quartz rod along a first direction. The first and second drive rollers are arranged parallel to each other in a first plane, and the first direction is perpendicular to the first plane.

[0009] The positioning rollers are rotatably mounted on the frame and include a first positioning roller and a second positioning roller. The first and second positioning rollers are arranged parallel to each other in a second plane. The first and second planes are parallel. The positioning rollers and the conveying rollers are arranged sequentially along a first direction so that the quartz rod passes through the positioning rollers and the conveying rollers in sequence. At least one of the first and second positioning rollers has an annular positioning groove on its outer surface that corresponds to the quartz rod.

[0010] The beneficial effects of this technical solution are as follows: In use, a passive roller positioning mechanism for quartz fiber melting involves the quartz rod sequentially passing through the positioning rollers and the conveying rollers along a first direction. The conveying rollers primarily provide the driving force for the movement of the quartz rod, while the positioning rollers primarily provide precise positioning. When the quartz rod is inserted between the first and second positioning rollers, the gap between the two positioning rollers gradually decreases, guiding the quartz rod through the arc-shaped outer surfaces of the two positioning rollers. This makes the insertion process very convenient and quick, and also ensures proper positioning of the quartz rod. The positional accuracy requirement for inserting the quartz rod is not high, while existing technologies require the quartz rod to be inserted coaxially with the positioning hole for successful insertion. After insertion, the quartz rod is positioned by the annular positioning grooves and clamped by the first and second positioning rollers, achieving high-precision positioning. It then continues to be inserted downwards into the conveying rollers. The conveying rollers provide driving force for the quartz rod while also providing some positioning. As they roll, they pull the quartz rod along the first direction. The positioning rollers roll along with the quartz rod due to friction, thus converting sliding friction into rolling friction. As can be seen from the above, compared to existing technologies, the solution in this application has the advantages of low quartz rod insertion accuracy requirements, high quartz rod positioning accuracy, and convenient and quick operation.

[0011] Based on the above scheme, the following improvements are made: there are multiple pairs of positioning rollers, which are arranged sequentially at intervals along the first direction.

[0012] The beneficial effects of this technical solution are: the setting of multi-stage positioning rollers can realize multi-stage positioning of longer quartz rods, improve the overall positioning accuracy of quartz rods, and avoid the lower end of quartz rods from shaking and affecting the quality of molten wire drawing.

[0013] Based on the above scheme, the following improvements are made: the spacing between multiple pairs of positioning rollers gradually decreases along the first direction.

[0014] The beneficial effects of this technical solution are as follows: the closer to the melting burner, the higher the positioning accuracy requirement for the quartz rod. The denser the positioning rollers are set, the higher the positioning accuracy of the quartz rod. However, since the quartz rod is long, the setting of positioning rollers will increase the cost. Therefore, the positioning rollers should be set more densely in areas with high accuracy requirements, while the positioning rollers should be set more sparsely in other areas with low positioning accuracy requirements to reduce costs.

[0015] Based on the above scheme, the following improvements are made: along the first direction, the distance between the first and second positioning rollers of the multiple pairs of positioning rollers gradually decreases.

[0016] The beneficial effects of this technical solution are as follows: the closer to the molten burner, the higher the positioning accuracy requirement for the quartz rod. The smaller the distance between the first and second positioning rollers, the tighter the quartz rod is clamped, and the less likely the quartz rod is to wobble. Therefore, the positioning accuracy of the quartz rod is higher. However, the smaller the distance between the first and second positioning rollers, the more difficult it is to insert the quartz rod. Therefore, the distance between the first and second positioning rollers should be as small as possible downstream of the molten burner, while the distance between the first and second positioning rollers should be set as large as possible upstream of the molten burner to facilitate the rapid insertion of the quartz rod, without losing the positioning ability of the quartz rod.

[0017] Based on the above scheme, the following improvements are made: at least one of the first and second positioning rollers has an elastic outer surface.

[0018] The beneficial effects of this technical solution are as follows: by setting elasticity, on the one hand, the quartz rod can be inserted more easily by using elasticity to avoid it, and on the other hand, the elasticity can increase the clamping force on the quartz rod, which is also beneficial to compensate for different diameter errors of the quartz rod.

[0019] Based on the above scheme, the following improvements are made: the outer surface of the annular positioning groove has an elastic layer with a uniform thickness.

[0020] The beneficial effects of this technical solution are as follows: This design aims to utilize the elastic layer to compensate for errors and improve clamping force, while simultaneously achieving precise positioning of the quartz rod using the rigid annular positioning groove. However, placing the annular positioning groove on the elastic layer would reduce its positioning accuracy. In other words, because the elastic layer needs to deform, its thickness must be as uniform as possible to avoid excessive deformation in certain areas due to inconsistent elastic layer thickness, which would affect the positioning accuracy of the quartz rod.

[0021] Based on the above scheme, the following improvements are made: the elastic layer is a corrugated cylindrical structure that can be detachably fitted onto the corresponding first and second positioning rollers.

[0022] Based on the above scheme, the following improvements are made: at least one of the first and second drive rollers has an elastic outer surface.

[0023] The beneficial effects of this technical solution are: the purpose is to maximize the clamping force of the first and second drive rollers on the quartz rod, and to avoid the quartz rod failing to move downstream at the set speed due to excessive friction between the first and second positioning rollers.

[0024] Based on the above scheme, further improvements are made as follows: there are three pairs of positioning rollers. The outer surfaces of the first and second positioning rollers of the first pair of positioning rollers are provided with the annular positioning groove, while only one of the first and second positioning rollers of the other two pairs of positioning rollers is provided with the annular positioning groove on its outer surface.

[0025] The beneficial effects of this technical solution are as follows: the more annular positioning grooves are set, the greater the possible fitting error in the positioning accuracy of the quartz rod. The more annular positioning grooves are set, the smoother the insertion of the quartz rod will be. Therefore, for the upstream, since the initial insertion process of the quartz rod needs to be smoother, annular positioning grooves are set on both the first and second positioning rollers. For the downstream, since the positioning accuracy requirement is higher, only one positioning roller is used with an annular positioning groove.

[0026] Based on the above scheme, the following improvements are made: the gap between the first and second positioning rollers is adjustable.

[0027] The beneficial effects of this technical solution are: it can accommodate more specifications of quartz rods, for example, when changing to quartz rods of different diameters, it can be quickly adjusted to adapt. Attached Figure Description

[0028] Figure 1 This is a longitudinal cross-sectional view of Embodiment 1 of the passive roller quartz rod positioning mechanism for quartz fiber melting according to the present invention.

[0029] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0030] Figure 3 for Figure 1 A cross-sectional view;

[0031] Figure 4 Top view of the positioning rollers (section view of the joints between the two ends and the frame);

[0032] Figure 5 for Figure 4 A magnified view of a section at point B in the middle;

[0033] Figure 6 This is a schematic diagram of the structure of the annular positioning groove and the elastic layer;

[0034] Figure 7 A top view of Embodiment 2 for positioning the rollers (sectional view at both ends where they mate with the frame);

[0035] Figure 8 for Figure 7 A magnified view of a section at point C;

[0036] In the diagram: 1-frame, 2-bearing, 3-motor, 4-coupling, 5-transmission gear, 6-conveying rollers, 61-first drive roller, 62-second drive roller, 7-quartz rod, 8-positioning rollers, 81-first positioning roller, 82-second positioning roller, 83-annular positioning groove, 84-elastic layer. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0041] Example 1 of the passive roller quartz rod positioning mechanism for quartz fiber melting of this utility model: The passive roller quartz rod positioning mechanism for quartz fiber melting of this embodiment is a positioning mechanism and rod feeding mechanism for producing quartz fiber filaments by the rod drawing method. It works by sending multiple rows of quartz rods to the flame nozzle of the corresponding melting burner for melting and then drawing quartz fiber filaments. Figure 1-6 As shown, the passive roller positioning mechanism for quartz rod 7 in quartz fiber melting includes a frame 1, a three-stage positioning roller 8 rotatably mounted on the frame 1 via a bearing 2, and a first-stage conveying roller 6. The positioning roller 8 is used to position the quartz rod 7, and the conveying roller 6 is used to pull the quartz rod 7 to move.

[0042] Specifically, the frame 1 is a frame structure assembled from horizontal and vertical plates. Corresponding mounting holes are provided for the mounting bearings 2 of the conveying rollers 6 and the positioning rollers 8.

[0043] The conveying rollers 6 include first and second drive rollers (61 and 62) that rotate in opposite directions, driven by a drive device, a geared motor 3, which drives a transmission gear 5 to rotate via a coupling 4. Both the first and second drive rollers (61 and 62) are equipped with transmission gears 5 with identical parameters to ensure synchronous rotation in opposite directions. The first and second drive rollers (61 and 62) are rotatably mounted on the frame 1 via bearings 2 for conveying quartz rods 7 along a first direction. The first and second drive rollers (61 and 62) are arranged parallel to each other in a first plane, and the first direction is perpendicular to the first plane. In this embodiment, the first plane and the second plane refer to two parallel horizontal planes, and the first direction refers to a top-down direction. In other embodiments, the first plane and the second plane can be vertical planes, and the first direction refers to a straight line within a horizontal plane perpendicular to the first plane.

[0044] The positioning rollers 8 are rotatably mounted on the frame 1, including first and second positioning rollers (81 and 82). Both first and second positioning rollers (81 and 82) are cylindrical roller structures, rotatably mounted on the frame 1 at both ends via rotating shafts and bearings 2. The first and second positioning rollers (81 and 82) are passively rotated without power. They are arranged parallel to each other or in contact with each other, without a transmission mechanism between them, and rotate independently. The first and second positioning rollers (81 and 82) are arranged parallel to each other in a second plane. The first and second planes are parallel. The positioning rollers 8 and the conveying rollers 6 are arranged sequentially along a first direction so that the quartz rod 7 passes through the positioning rollers 8 and the conveying rollers 6 in sequence. At least one of the first and second positioning rollers (81 and 82) has annular positioning grooves 83 on its outer surface that correspond one-to-one with the quartz rod 7. In this embodiment, the outer surfaces of the first and second positioning rollers (81 and 82) are provided with annular positioning grooves 83, and they are provided in correspondence with each other. That is, the number, size and position of the annular positioning grooves 83 on the two positioning rollers are all corresponding, and a pair of annular positioning grooves 83 on the two positioning rollers correspond to a quartz rod 7.

[0045] In this embodiment, there are multiple pairs of positioning rollers 8, specifically three pairs, arranged sequentially at intervals along the first direction. The multi-stage positioning rollers 8 enable multi-stage positioning of the longer quartz rod 7, improving the overall positioning accuracy of the quartz rod 7 and preventing the lower end of the quartz rod 7 from wobbling and affecting the quality of the molten wire drawing. The spacing between the multiple pairs of positioning rollers 8 gradually decreases along the first direction. Since the positioning accuracy requirement for the quartz rod 7 is higher closer to the melting burner, and the denser the positioning rollers 8 are arranged, the higher the positioning accuracy of the quartz rod 7 will be. However, because the quartz rod 7 is long, the arrangement of the positioning rollers 8 increases cost. Therefore, the positioning rollers 8 are arranged more densely in areas with high accuracy requirements, while those in areas with lower accuracy requirements are arranged more sparsely to reduce cost. Along the first direction, the spacing between the first and second positioning rollers (81 and 82) of the multiple pairs of positioning rollers 8 gradually decreases. The closer to the molten burner, the higher the positioning accuracy requirement for the quartz rod 7. A smaller gap between the first and second positioning rollers (81 and 82) clamps the quartz rod 7 more tightly, making it less prone to wobbling and thus achieving higher positioning accuracy. However, a smaller gap also increases the difficulty of inserting the quartz rod 7. Therefore, downstream of the molten burner, the gap between the first and second positioning rollers (81 and 82) is kept as small as possible. Upstream of the molten burner, to facilitate rapid insertion of the quartz rod 7, the gap is set as large as possible, while maintaining the positioning capability. At least one of the first and second positioning rollers (81 and 82) has an elastic outer surface. In this embodiment, both positioning rollers have elastic outer surfaces, i.e., they are respectively fitted with elastic sleeves or coated with an elastic layer 84. By incorporating elasticity, the quartz rod 7 can be inserted more easily by utilizing elasticity to avoid interference. Furthermore, the elasticity increases the clamping force on the quartz rod 7 and helps compensate for differences in diameter. The outer surface of the annular positioning groove 83 has an elastic layer 84 with a uniform thickness. This design aims to compensate for errors and increase clamping force using the elastic layer 84, while simultaneously utilizing the rigid annular positioning groove 83 to achieve precise positioning of the quartz rod 7. However, placing the annular positioning groove 83 directly on the elastic layer 84 would reduce its positioning accuracy. In other words, because the elastic layer 84 needs to deform, its thickness must be as uniform as possible to avoid excessive deformation in certain areas due to inconsistent thickness, which would affect the positioning accuracy of the quartz rod 7. The elastic layer 84 is a corrugated cylindrical structure that can be detachably mounted on the corresponding first and second positioning rollers (81 and 82).

[0046] At least one of the first and second drive rollers (61 and 62) has an elastic outer surface. The purpose of this is to maximize the clamping force of the first and second drive rollers (61 and 62) on the quartz rod 7, and to prevent the quartz rod 7 from failing to move downstream at the set speed due to excessive friction between the first and second positioning rollers (81 and 82).

[0047] In use, the quartz rod 7 sequentially passes through the positioning roller 8 and the conveying roller 6 along the first direction. The conveying roller 6 mainly provides the driving force for the movement of the quartz rod 7, while the positioning roller 8 mainly provides precise positioning for the quartz rod 7. When the quartz rod 7 is inserted between the first and second positioning rollers (81 and 82), because the gap between the two positioning rollers gradually changes from large to small, the quartz rod 7 is guided by the arc-shaped outer surfaces of the two positioning rollers during insertion, making the insertion process of the quartz rod 7 very convenient and quick, and the positional accuracy requirement for the insertion of the quartz rod 7 is not high. In existing technologies, the positioning holes require the quartz rod 7 to be inserted coaxially with the positioning hole for successful insertion. After insertion, the quartz rod 7 is positioned by the annular positioning groove 83 and clamped by the first and second positioning rollers (81 and 82) to achieve high-precision positioning. It then continues to be inserted downwards into the conveying rollers 6. The conveying rollers 6 provide driving force for the quartz rod 7 while also providing some positioning. As they roll, they pull the quartz rod 7 along the first direction. The positioning rollers 8 roll along with the quartz rod 7 due to the friction of the quartz rod 7, thus converting sliding friction into rolling friction. As can be seen from the above, compared to existing technologies, the solution of this application has the advantages of lower requirements for the insertion accuracy of the quartz rod 7, higher positioning accuracy of the quartz rod 7, and convenient and quick operation.

[0048] In other embodiments, there are three pairs of positioning rollers 8. The outer surfaces of the first and second positioning rollers (81 and 82) of the first pair of positioning rollers 8 are provided with annular positioning grooves 83. The outer surfaces of the outer surfaces of the first and second positioning rollers of the other two pairs of positioning rollers 8 are provided with annular positioning grooves 83, as shown in the attached figure. Figure 7 , 8 As shown. The more annular positioning grooves 83 are provided, the greater the potential misalignment error in the positioning accuracy of the quartz rod 7. However, the more annular positioning grooves 83 are provided, the smoother the insertion of the quartz rod 7. Therefore, for the upstream, where a smoother initial insertion of the quartz rod 7 is required, annular positioning grooves 83 are provided on both the first and second positioning rollers (81 and 82). Downstream, due to higher positioning accuracy requirements, only one positioning roller has an annular positioning groove 83. The gap between the first and second positioning rollers (81 and 82) is adjustable. This allows for the adaptation of more specifications of quartz rods 7; for example, when changing to quartz rods 7 of different diameters, quick adjustment is possible.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A passive roller positioning mechanism for quartz rods in quartz fiber melting, comprising: frame; Its characteristic is that it further includes: The conveying rollers include a first and a second drive rollers that are driven to rotate in opposite directions by a drive device. The first and second drive rollers are rotatably mounted on a frame for conveying a quartz rod along a first direction. The first and second drive rollers are arranged parallel to each other in a first plane, and the first direction is perpendicular to the first plane. The positioning rollers are rotatably mounted on the frame and include a first positioning roller and a second positioning roller. The first and second positioning rollers are arranged parallel to each other in a second plane. The first and second planes are parallel. The positioning rollers and the conveying rollers are arranged sequentially along a first direction so that the quartz rod passes through the positioning rollers and the conveying rollers in sequence. At least one of the first and second positioning rollers has an annular positioning groove on its outer surface that corresponds to the quartz rod.

2. The passive roller positioning mechanism for quartz rods in quartz fiber melting according to claim 1, characterized in that, There are multiple pairs of positioning rollers, which are arranged sequentially at intervals along the first direction.

3. The passive roller positioning mechanism for quartz rods in quartz fiber melting according to claim 2, characterized in that, The spacing between multiple pairs of positioning rollers gradually decreases along the first direction.

4. The passive roller positioning mechanism for quartz rods in quartz fiber melting according to claim 2, characterized in that, Multiple pairs of positioning rollers move along the first direction, with the distance between the first and second positioning rollers gradually decreasing.

5. The passive roller positioning mechanism for quartz rods in quartz fiber melting according to claim 1, characterized in that, At least one of the first and second positioning rollers has an elastic outer surface.

6. The passive roller positioning mechanism for quartz rods in quartz fiber melting according to claim 5, characterized in that, The outer surface of the annular positioning groove has an elastic layer with a uniform thickness.

7. The passive roller positioning mechanism for quartz rods in quartz fiber melting according to claim 6, characterized in that, The elastic layer is a corrugated cylindrical structure that can be detachably fitted onto the corresponding first and second positioning rollers.

8. The passive roller positioning mechanism for quartz rods in quartz fiber melting according to claim 1, characterized in that, At least one of the first and second drive rollers has an elastic outer surface.

9. A passive roller quartz rod positioning mechanism for quartz fiber melting according to claim 2, characterized in that, There are three pairs of positioning rollers. The outer surfaces of the first and second positioning rollers of the first pair of positioning rollers are provided with the annular positioning groove. Only one of the first and second positioning rollers of the other two pairs of positioning rollers is provided with the annular positioning groove on its outer surface.

10. The passive roller quartz rod positioning mechanism for quartz fiber melting according to claim 1, characterized in that, The gap between the first and second positioning rollers is adjustable.

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