Optical fiber twisting device and optical fiber production system
By applying a charge to the surface of the optical fiber and using a rotating magnetic field to twist it, the problems of bending deformation and breakage in the optical fiber twisting device were solved, and the stability and high efficiency of optical fiber twisting were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SICHUAN TIANFU JIANGDONG TECH CO LTD
- Filing Date
- 2023-12-29
- Publication Date
- 2026-05-12
AI Technical Summary
Existing fiber twisting devices are prone to causing fiber bending deformation, coating damage and breakage, resulting in low twisting quality.
A charge-adding component is used to apply a charge to the surface of the optical fiber, and a rotating magnetic field is generated by a magnetic field generating component to cause the optical fiber to twist under the action of Lorentz force. The central axis of the optical fiber is controlled to coincide to achieve stable twisting.
This improves the stability and production quality of fiber twisting, reduces the risk of breakage, ensures the integrity of the fiber surface and the stability of the polarization film dispersion effect, and improves production efficiency.
Smart Images
Figure CN117735831B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of optical fiber technology, and more specifically, to an optical fiber twisting device and an optical fiber production system. Background Technology
[0002] To improve the signal transmission performance of optical fibers, known technologies typically employ guide rollers to twist the fibers. However, existing guide rollers can easily cause bending deformation, coating damage, and even fiber breakage when twisting fibers, resulting in poor twisting quality. Summary of the Invention
[0003] This application provides an optical fiber twisting device and an optical fiber production system to solve some known technical problems related to low quality of optical fiber twisting.
[0004] The embodiments of this application are implemented as follows:
[0005] In a first aspect, this application provides an optical fiber twisting device, comprising: a charge attaching component, the charge attaching component having an attaching channel for an optical fiber to pass through, the charge attaching component for attaching a charge to the surface of the optical fiber; a magnetic field generating component, the magnetic field generating component being disposed on one side of the charge attaching component, the magnetic field generating component defining a twisting channel, the twisting channel being disposed through a first direction, the twisting channel having a first central axis, the twisting channel being for the charged optical fiber to pass through along the first direction, the magnetic field generating component being used to generate a magnetic field, the magnetic field generating component being used to control the magnetic field to rotate around the first central axis; wherein, when the charged optical fiber passes through the twisting channel along the first direction, and the second central axis of the optical fiber coincides with the first central axis, the charged optical fiber can twist around the second central axis under the action of the rotating magnetic field.
[0006] According to the fiber optic twisting device of this application, a charge is applied to the outer circumference of the fiber optic cable by a charge-applying component. When the charged fiber optic cable moves relative to the magnetic field in a first direction, it is equivalent to forming a current flowing in the first direction at the fiber optic cable. Thus, according to the right-hand rule, an induced magnetic field is generated on the outer side of the fiber optic cable in a concentric circular pattern from the inside out under the influence of the magnetic field. When the magnetic field generating component controls the magnetic field to rotate around the first central axis, the Lorentz force between the magnetic field and the induced magnetic field also rotates accordingly, causing the fiber optic cable to twist. Therefore, when twisting the fiber optic cable, the fiber optic twisting device of this application only needs to control the second central axis of the fiber optic cable to coincide with the first central axis, so that the charged fiber optic cable can twist around the second central axis under the influence of the magnetic field. This ensures that the spatial position of the fiber optic cable remains unchanged during the twisting process, thereby preventing bending and deformation of the fiber optic cable and reducing the risk of fiber breakage. At the same time, since the fiber optic cable twists under the influence of the magnetic field, the twisting angle of the fiber optic cable is the same as the twisting angle of the magnetic field, which facilitates accurate and reliable control of the twisting of the fiber optic cable.
[0007] Furthermore, since the charge attaching component has an additional channel, it can uniformly attach charge to all parts of the outer periphery of the optical fiber passing through the additional channel. At the same time, the magnetic field generating component forms a torsion channel. When the charged optical fiber passes through the torsion channel along the first direction, all parts of the outer periphery of the optical fiber can be subjected to the magnetic field. This makes the force distribution on the outer periphery of the optical fiber under the action of the magnetic field more uniform, which can further ensure that the spatial position of the optical fiber remains fixed when it is torsion under the action of the magnetic field, thereby further reducing the risk of optical fiber breakage.
[0008] Therefore, the fiber twisting device of this application can ensure the stability of fiber twisting, ensure the surface integrity of the fiber, stabilize the polarization film dispersion effect of the fiber, improve the production quality of the fiber, significantly reduce the risk of fiber breakage, and improve the production efficiency of the fiber.
[0009] In one possible implementation:
[0010] The magnetic field generating assembly includes two magnetic field generating elements, which are used to generate a composite magnetic field. The two composite magnetic fields form the magnetic field, and each of the two composite magnetic fields has a composite magnetic field vector. Both composite magnetic field vectors are perpendicular to the first central axis, and the directions of the two composite magnetic field vectors are opposite and their magnitudes are equal. The magnetic field generating elements are also used to control the composite magnetic field vectors to rotate around the first central axis, and the rotation direction and rotation speed of the two composite magnetic field vectors are the same.
[0011] In one possible implementation:
[0012] The two magnetic field generators are arranged opposite each other along a second direction, which is perpendicular to the first direction. Each magnetic field generator has an arc surface, and the two arc surfaces together form the torsion channel. The distance between each arc surface and the first central axis is equal.
[0013] In one possible implementation:
[0014] The magnetic field generator includes multiple magnetic field units, which are spaced apart around the first central axis. Each magnetic field unit generates a sub-magnetic field, and the sub-magnetic fields combine to form the composite magnetic field. Each sub-magnetic field has a sub-magnetic field vector, and the directions of the sub-magnetic field vectors are different. Each sub-magnetic field vector is perpendicular to the first central axis and intersects at the same point on the first central axis. The magnetic field unit is also used to control the magnitude and direction of the sub-magnetic field vectors so that the composite magnetic field rotates around the first central axis.
[0015] In one possible implementation:
[0016] The magnetic field unit includes multiple excitation coils and multiple Helmholtz coils, which are staggered around a third central axis perpendicular to the first central axis. The excitation coils are used to pass alternating current to generate a first induced magnetic field, and the Helmholtz coils are used to pass direct current to generate a second induced magnetic field. The multiple first induced magnetic fields and the multiple second induced magnetic fields together synthesize the sub-magnetic field. The magnetic field unit can control the alternating current parameters of the excitation coils and the direct current parameters of the Helmholtz coils to control the parameters of the first induced magnetic field and the second induced magnetic field, thereby controlling the magnitude and direction of the sub-magnetic field vector.
[0017] In one possible implementation:
[0018] The excitation coil is provided in three parts, and the Helmholtz coil is provided in three parts. The three excitation coils and the three Helmholtz coils are located at the six vertices of a regular hexagon perpendicular to the third central axis.
[0019] In one possible implementation:
[0020] The magnetic field generator also includes an arc-shaped plate, and a plurality of magnetic field units are disposed on the inner side of the arc-shaped plate.
[0021] In one possible implementation:
[0022] The charge-adding component includes a cathode portion and an anode portion, which are spaced apart along the length of the additional channel. An electron jet groove is defined between the cathode portion and the anode portion and is connected to the additional channel. The cathode portion and the anode portion are used to cooperate with each other to generate charge and add the charge to the surface of the optical fiber passing through the additional channel.
[0023] In one possible implementation:
[0024] The fiber twisting device further includes a charge elimination component, which is located on the side of the magnetic field generating component away from the charge addition component along the first direction. The charge elimination component has a charge removal channel for the twisted fiber to pass through and for eliminating the surface charge of the twisted fiber.
[0025] In one possible implementation:
[0026] The inner surface of the electrostatic discharge channel is provided with an annular exhaust port, which is connected to an inert gas source. The inert gas source is used to spray a charged inert gas flow through the annular exhaust port. The charged inert gas flow is used to contact the charge on the outer peripheral surface of the optical fiber, thereby eliminating the surface charge of the optical fiber.
[0027] Secondly, this application provides an optical fiber production system, including the aforementioned optical fiber twisting device and pulling device. The pulling device is used to pull the optical fiber so that it passes through the optical fiber twisting device. Attached Figure Description
[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a schematic diagram of the structure of an optical fiber twisting device according to an embodiment of this application;
[0030] Figure 2 This is a schematic diagram of the structure of a magnetic field generating component according to an embodiment of this application;
[0031] Figure 3 This is a schematic diagram of the structure of an excitation unit according to an embodiment of this application;
[0032] Figure 4 This is a schematic diagram of the structure of an optical fiber production system according to an embodiment of this application.
[0033] Explanation of key component symbols:
[0034]
[0035] Detailed Implementation
[0036] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.
[0037] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.
[0039] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0040] See Figure 1This embodiment provides an optical fiber twisting device 100, including a charge attaching component 10 and a magnetic field generating component 20. The charge attaching component 10 has an additional channel 11 for an optical fiber 300 to pass through, and the charge attaching component 10 is used to attach a charge to the surface of the optical fiber 300. The magnetic field generating component 20 is disposed on one side of the charge attaching component 10, and the magnetic field generating component 20 defines a twisting channel 21, which is disposed along a first direction X and has a first central axis Q1. The twisting channel 21 is used for the charged optical fiber 300 to pass through along the first direction X, and the magnetic field generating component 20 is used to generate a magnetic field and control the magnetic field to rotate around the first central axis Q1. When the charged optical fiber 300 passes through the twisting channel 21 along the first direction X, and the second central axis Q2 of the optical fiber 300 coincides with the first central axis Q1, the charged optical fiber 300 can twist around the second central axis Q2 under the action of the rotating magnetic field.
[0041] According to the fiber optic twisting device 100 of this application, a charge is applied to the outer peripheral surface of the fiber optic cable 300 by the charge attaching component 10. When the charged fiber optic cable 300 moves relative to the magnetic field along the first direction X, it is equivalent to forming a current flowing along the first direction X at the fiber optic cable 300. Thus, according to the right-hand rule, under the action of the magnetic field, an induced magnetic field distributed concentrically from the inside to the outside is generated on the outer side of the fiber optic cable 300. When the magnetic field generating component 20 controls the magnetic field to rotate around the first central axis Q1, the Lorentz force between the magnetic field and the induced magnetic field will also rotate accordingly, causing the fiber optic cable 300 to twist. Therefore, when twisting the fiber optic cable 300, the fiber optic twisting device 100 of this application only needs to control the second central axis Q2 of the fiber optic cable 300 to coincide with the first central axis Q1, so that the charged fiber optic cable 300 can be twisted around the second central axis Q2 under the action of the magnetic field. This ensures that the spatial position of the fiber optic cable 300 remains unchanged during the twisting process, thereby preventing the fiber optic cable 300 from bending and deforming during the twisting process and reducing the risk of fiber optic cable breakage. Meanwhile, because the optical fiber 300 twists under the influence of the magnetic field, the twist angle of the optical fiber 300 is the same as the twist angle of the magnetic field, which makes it easy to accurately and reliably control the twist of the optical fiber 300.
[0042] Furthermore, since the charge attaching component 10 is provided with an additional channel 11, the charge attaching component 10 can uniformly attach charge to all parts of the outer peripheral surface of the optical fiber 300 passing through the additional channel 11. At the same time, the magnetic field generating component 20 forms a torsion channel 21. When the charged optical fiber 300 passes through the torsion channel 21 along the first direction X, all parts of the outer peripheral surface of the optical fiber 300 can be subjected to the magnetic field. This makes the force distribution on the outer peripheral surface of the optical fiber 300 under the action of the magnetic field more uniform, which can further ensure that the spatial position of the optical fiber 300 remains fixed when it is torsion under the action of the magnetic field, thereby further reducing the risk of breakage of the optical fiber 300.
[0043] Therefore, the fiber twisting device 100 of this application can ensure the stability of fiber twisting, ensure the surface integrity of fiber 300, stabilize the polarization film dispersion effect of fiber 300, improve the production quality of fiber 300, significantly reduce the risk of fiber breakage, and improve the production efficiency of fiber 300.
[0044] In this embodiment, the charge attaching component 10 and the magnetic field generating component 20 are spaced apart along the first direction X, and the additional channel 11 is arranged through the optical fiber 300 along the first direction X. Thus, the optical fiber 300 can move from the charge attaching component 10 to the magnetic field generating component 20 along the first direction X without changing its traction direction, and then exit through the twisting channel 21. This further reduces the bending action of the optical fiber 300 and improves the reliability of twisting the optical fiber 300.
[0045] Of course, in other embodiments of this application, the positional relationship between the charge attaching component 10 and the magnetic field generating component 20 can be adjusted according to actual processing requirements (such as processing site space limitations). When the charge attaching component 10 and the magnetic field generating component 20 are offset along the first direction X, a steering wheel can be provided between the charge attaching component 10 and the magnetic field generating component 20.
[0046] In this embodiment, see Figure 1 and Figure 2 The magnetic field generating component 20 includes two magnetic field generating elements 22, which are arranged opposite each other along a second direction Y, which is perpendicular to the first direction X. Each magnetic field generating element 22 has an arc surface, and the two arc surfaces together form a torsion channel 21. The distance between each arc surface and the first central axis Q1 is equal. The two magnetic field generating elements 22 are used to generate a composite magnetic field B. The two composite magnetic fields B form a magnetic field, and each composite magnetic field B has a composite magnetic field B vector. Both composite magnetic field B vectors are perpendicular to the first central axis Q1. The directions of the two composite magnetic field B vectors are opposite and their magnitudes are equal. The magnetic field generating elements 22 are also used to control the rotation of the composite magnetic field B vectors around the first central axis Q1, and the rotation direction and rotation speed of the two composite magnetic field B vectors are the same.
[0047] After applying a charge to the surface of the optical fiber 300, when the optical fiber 300 passes between two composite magnetic fields B, one composite magnetic field B can form a first Lorentz force with the charge on the surface of the moving optical fiber 300, and the other composite magnetic field B can form a second Lorentz force with the charge on the surface of the moving optical fiber 300. Subsequently, by controlling the two composite magnetic field B vectors to rotate around the first central axis Q1 in the same direction, the rotation of the magnetic field around the first central axis Q1 can be controlled. Thus, by controlling the rotation direction and rotation speed of the two composite magnetic field B vectors to be the same, stable rotation of the magnetic field can be achieved, thereby ensuring that the spatial position of the optical fiber 300 remains fixed during the twisting process.
[0048] Furthermore, the strength, rotation speed, and rotation angle of the two combined magnetic fields B are easy to control, which allows for rapid, efficient, and accurate adjustment and control of the two combined magnetic fields B according to different types of optical fibers 300, thereby improving the reliability, applicability, and convenience of optical fiber 300 twisting control.
[0049] In this embodiment, see Figure 1 and Figure 2 The magnetic field generator 22 includes multiple magnetic field units 23, which are arranged circumferentially along the arc surface. Each magnetic field unit 23 generates a sub-magnetic field B1. The sub-magnetic fields B1 are combined to form a composite magnetic field B. Each sub-magnetic field B1 has a sub-magnetic field vector. The directions of the sub-magnetic field vectors are different from each other. Each sub-magnetic field vector is perpendicular to the first central axis Q1 and intersects at the same point of the first central axis Q1. The magnetic field unit 23 is also used to control the magnitude and direction of the sub-magnetic field vectors so that the composite magnetic field B rotates around the first central axis Q1.
[0050] The directions of the multiple sub-magnetic field vectors are different, and they intersect at the same point on the first central axis Q1. Thus, by controlling the magnitude and direction of each sub-magnetic field vector, the first composite magnetic field B formed by the sub-magnetic field vectors can be made to rotate around the first central axis Q1.
[0051] To facilitate understanding by those skilled in the art, the magnetic field of a three-phase motor is introduced for explanation. A known three-phase motor has three coil windings, each of which is supplied with three-phase alternating current. The three-phase alternating current forms three intersecting magnetic field vectors in the three coil windings. The magnitude and direction of the three magnetic field vectors change with the three-phase current, ultimately forming a magnetic field of constant magnitude that rotates around an axis.
[0052] The method by which multiple sub-magnetic fields B1 are combined to form a composite magnetic field B in this application is similar to that of a three-phase motor. Therefore, those skilled in the art can combine multiple sub-magnetic fields B1 into a composite magnetic field B according to the parallelogram rule, and by controlling the magnitude and direction of each sub-magnetic field B1, make the vector of the composite magnetic field B rotate around the first central axis Q1.
[0053] For example, Figure 2 In the left semicircular part, the combined magnetic field B of the three sub-magnetic fields B1 points to the left. Figure 2 In the right semicircle, the three sub-magnetic fields B1 combine to form a composite magnetic field B that points to the right.
[0054] Obviously, there are many ways to coordinate the number, intensity, and direction of the sub-magnetic field B1. Those skilled in the art can arrange and combine them arbitrarily according to actual control requirements, and will not be described exhaustively here.
[0055] In this embodiment, see Figure 3 The magnetic field unit 23 includes multiple excitation coils 231 and multiple Helmholtz coils 232, which are staggered around a third central axis Q3, which is perpendicular to the first central axis Q1. The excitation coils 231 are used to pass alternating current to generate a first induced magnetic field, and the Helmholtz coils 232 are used to pass direct current to generate a second induced magnetic field. The multiple first induced magnetic fields and the multiple second induced magnetic fields together synthesize a sub-magnetic field B1. The magnetic field unit 23 can control the alternating current parameters of the excitation coils 231 and the direct current parameters of the Helmholtz coils 232 to control the parameters of the first induced magnetic field and the second induced magnetic field, thereby controlling the magnitude and direction of the sub-magnetic field vector.
[0056] In this embodiment, see Figure 3 There are three excitation coils 231 and three Helmholtz coils 232. The three excitation coils 231 and the three Helmholtz coils 232 are located at the six vertices of a regular hexagon perpendicular to the third central axis Q3.
[0057] The magnetic field lines of the magnetic field formed by the excitation coil 231 after the alternating current is passed through it are distributed in a "donut" shape. As a result, the magnetic field lines of the first induced magnetic field formed by two adjacent excitation coils 231 are less distributed in the region near the second central axis Q2. Thus, the magnetic field synthesized by multiple excitation coils 231 at the third central axis Q3 has poor stability.
[0058] The magnetic field formed by the Helmholtz coil 232 after a direct current is applied is a uniform magnetic field. Since the Helmholtz coil 232 is located between two adjacent excitation coils 231, the magnetic field lines of the second induced magnetic field can fill the region of the two adjacent first induced magnetic fields at the position of the third central axis Q3. In this way, the multiple first induced magnetic fields and multiple second induced magnetic fields can form a stable standing wave at the position of the third central axis Q3. The magnetic fields at this standing wave position are combined to form a sub-magnetic field B1, and the sub-magnetic field vector of the sub-magnetic field B1 points towards the first central axis Q1.
[0059] Because a Helmholtz coil 232 is added between two adjacent excitation coils 231, the waveform of the sub-magnetic field B1 at the standing wave position is relatively stable, unlike the unstable sinusoidal waveform of the magnetic field of one of the coil windings of a three-phase motor. Thus, when controlling the rotation direction of the sub-magnetic field vector, the sub-magnetic field vector can rotate both clockwise and counterclockwise, and the rotation direction of the sub-magnetic field vector can be changed in real time, which facilitates real-time control of the torsion of the optical fiber 300.
[0060] Furthermore, due to the stable waveform of the sub-magnetic field B1, the minimum rotation angle of the sub-magnetic field vector can be increased. For example, this minimum rotation angle can be as low as 0.5°, thus enabling high-precision twisting of the optical fiber 300 and further improving the twisting quality of the optical fiber 300. In this embodiment, the twisting angle of the optical fiber 300 can be determined according to actual needs, for example, it can be set to any angle from 0.5° to 360°, which will not be elaborated further here.
[0061] Furthermore, in this embodiment, the parameters of the alternating current include frequency, phase, voltage, and current, while the parameters of the direct current include voltage and current. By controlling these parameters, the direction and magnitude of the sub-magnetic field B1 can be controlled. Moreover, by controlling the direction and magnitude of each sub-magnetic field B1, the rotation direction, rotation speed, and magnetic field strength of the composite magnetic field B can be controlled. Since the above control methods are readily available to those skilled in the art through relevant formulas, they will not be elaborated upon here.
[0062] In this embodiment, the magnetic field generator 22 also includes an arc-shaped plate 24, with multiple magnetic field units 23 disposed on the inner side of the arc-shaped plate 24. Multiple magnetic field units 23 are respectively disposed on the inner side of two arc-shaped plates 24. This simplifies the calculation of the control formulas for the direction and magnitude of the sub-magnetic field B1, reduces control difficulty, and improves the accuracy of controlling related parameters such as magnetic field rotation speed, rotation angle, and magnetic field strength.
[0063] Optionally, the arc angle of the arc plate 24 can be set to 180°. Depending on the actual torsion requirements, the arc angle of the arc plate 24 can also be set to other angles. Furthermore, the two magnetic field generators 22 can also share a cylindrical structure, and multiple magnetic field units 23 can be arranged inside the cylindrical structure. Therefore, the specific structure of the magnetic field generator 22 can be determined according to actual needs.
[0064] In this embodiment, the inner diameter of the arc plate 24 can be set between 150mm and 200mm. For example, it can be any one of 150mm, 155mm, 160mm, 170mm, 175mm, 180mm, 185mm, 190mm, 195mm, and 200mm. The inner diameter of the arc plate 24 can be controlled according to the actual twisting requirements of the optical fiber 300. For example, when the outer diameter of the optical fiber 300 is large, the inner diameter of the arc plate 24 can be reduced, and when the outer diameter of the optical fiber 300 is small, the inner diameter of the arc plate 24 can be appropriately increased.
[0065] In this embodiment, the length of the arc-shaped plate 24 along the first direction X can be set between 200mm and 250mm. For example, its length can be any one of 200mm, 205mm, 210mm, 215mm, 220mm, 225mm, 230mm, 235mm, 240mm, 245mm, and 250mm. By controlling the length of the arc-shaped plate 24 along the first direction X, it can be ensured that the optical fiber 300 can be twisted during high-speed traction, thereby ensuring the twisting reliability of the optical fiber 300.
[0066] Optionally, in this embodiment, the number of magnetic field generating components 20 can also be set to multiple, and the multiple magnetic field generating components 20 can be arranged at intervals in the first direction X.
[0067] In this embodiment, see Figure 1 The charge attaching component 10 includes a cathode portion 12 and an anode portion 13, which are spaced apart along the length of the attaching channel 11. An electron ejection groove 14 is defined between the cathode portion 12 and the anode portion 13, and the electron ejection groove 14 is connected to the attaching channel 11. The cathode portion 12 and the anode portion 13 are used to cooperate with each other to generate charge and attach the charge to the surface of the optical fiber 300 passing through the attaching channel 11.
[0068] Optionally, see Figure 1 The charge attachment 10 also includes two vacuum tubes 15, one of which is connected to the cathode 12 and the other is connected to the anode 13. The two vacuum tubes 15 are respectively connected to the auxiliary channel 11.
[0069] Optionally, the charge attaching component 10 attaches a negative charge to the optical fiber 300, which is easier to attach and can ensure that a uniform charge is attached to the outer circumferential surface of the optical fiber 300.
[0070] In this embodiment, see Figure 1The fiber twisting device 100 also includes a charge elimination component 30, which is disposed along the first direction X on the side of the magnetic field generating component 20 away from the charge addition component 10. The charge elimination component 30 is provided with a charge removal channel 31, which is used for the completed twisted fiber 300 to pass through and for eliminating the surface charge of the completed twisted fiber 300.
[0071] In this embodiment, see Figure 1 The inner surface of the non-electric channel 31 is provided with an annular exhaust port 32, which is connected to an inert gas source 33. The inert gas source 33 is used to spray a charged inert gas flow through the annular exhaust port 32. The charged inert gas flow is used to contact the charge on the outer peripheral surface of the optical fiber 300, thereby eliminating the surface charge of the optical fiber 300.
[0072] By using charged inert airflow to purge the outer circumferential surface of the optical fiber 300, the charge elimination effect can be improved, allowing any position on the circumferential surface of the optical fiber 300 to fully contact the charged inert airflow, thereby ensuring the charge elimination effect on the surface of the optical fiber 300 and ensuring that the electron elimination rate on the surface of the optical fiber 300 is not less than 99%.
[0073] In this embodiment, the gas in the charged inert gas stream can be nitrogen.
[0074] Specifically, inert gas can generate a large number of positive and negative ions through ionization, and then form a charged inert gas flow with positive and negative ions. The charged inert gas flow is then used to sweep the outer surface of the optical fiber 300, so that the positive and negative ions of the charged inert gas flow come into contact with the charge on the surface of the optical fiber 300, thereby neutralizing the charge on the surface of the optical fiber 300 and achieving the electron elimination effect.
[0075] See Figure 4 This embodiment also provides an optical fiber production system 200, including the aforementioned optical fiber twisting device 100 and pulling device 201. The pulling device 201 is used to pull the optical fiber 300 so that the optical fiber 300 passes through the optical fiber twisting device 100.
[0076] According to the optical fiber production system 200 of this embodiment, non-contact twisting of optical fiber 300 can be realized, thereby improving the twisting quality and twisting efficiency of optical fiber 300.
[0077] In this embodiment, the traction device 201 includes a guide wheel 2011. The guide wheel 2011 is located on the side of the magnetic field generating component 20 away from the charge attaching component 10 along the first direction X, and the circumferential surface of the guide wheel 2011 is tangent to the optical fiber 300.
[0078] Thus, by setting the guide wheel 2011, it can be further ensured that the second central axis Q2 of the optical fiber 300 coincides with the first central axis Q1 during the traction process of the optical fiber 300, thereby ensuring that the spatial position of the optical fiber 300 remains unchanged during the torsion process.
[0079] In this embodiment, see Figure 1 The traction device 201 also includes a traction machine 2012, which is used to apply traction force to the optical fiber 300 so that the optical fiber 300 passes through the optical fiber twisting device 100 along the first direction X.
[0080] In this embodiment, see Figure 1 The fiber optic 300 production equipment also includes a drawing device 202, which is spaced apart from the charge-adding component 10 along the first direction X. The drawing device 202 is used to draw the preform into fiber optic 300. Through the cooperation of the drawing device 202 and the guide wheel 2011, it can be further ensured that when the fiber optic 300 passes through the magnetic field generating component 20, the first central axis Q1 and the second central axis Q2 remain coincident.
[0081] Of course, in other embodiments of this application, other optical fiber 300 production and processing devices may be provided between the drawing device 202 and the optical fiber twisting device 100, which will not be described in detail here.
[0082] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.
Claims
1. A fiber optic twisting device, characterized in that, include: A charge attaching component, wherein the charge attaching component has an additional channel for an optical fiber to pass through, and the charge attaching component is used to attach a charge to the surface of the optical fiber; A magnetic field generating component is disposed on one side of the charge attaching component. The magnetic field generating component defines a torsion channel that extends through the component along a first direction and has a first central axis. The torsion channel is used for the optical fiber with attached charge to pass through along the first direction. The magnetic field generating component is used to generate a magnetic field and to control the rotation of the magnetic field around the first central axis. The magnetic field generating component includes two magnetic field generating elements, which are used to generate a composite magnetic field. The two composite magnetic fields form the magnetic field. The two composite magnetic fields each have a composite magnetic field vector. Both composite magnetic field vectors are perpendicular to the first central axis and have opposite directions and equal magnitudes. The magnetic field generating elements are also used to control the rotation of the composite magnetic field vectors around the first central axis, and the rotation direction and rotation speed of the two composite magnetic field vectors are the same. Specifically, when the optical fiber with an applied charge passes through the twisting channel along the first direction, and the second central axis of the optical fiber coincides with the first central axis, the optical fiber with the applied charge can twist around the second central axis under the action of the rotating magnetic field.
2. The optical fiber twisting device according to claim 1, characterized in that: The two magnetic field generators are arranged opposite each other along a second direction, which is perpendicular to the first direction. Each magnetic field generator has an arc surface, and the two arc surfaces together form the torsion channel. The distance between each arc surface and the first central axis is equal.
3. The optical fiber twisting device according to claim 1, characterized in that: The magnetic field generator includes multiple magnetic field units, which are spaced apart around the first central axis. Each magnetic field unit generates a sub-magnetic field, and the sub-magnetic fields combine to form the composite magnetic field. Each sub-magnetic field has a sub-magnetic field vector, and the directions of the sub-magnetic field vectors are different. Each sub-magnetic field vector is perpendicular to the first central axis and intersects at the same point on the first central axis. The magnetic field unit is also used to control the magnitude and direction of the sub-magnetic field vectors so that the composite magnetic field rotates around the first central axis.
4. The optical fiber twisting device according to claim 3, characterized in that: The magnetic field unit includes multiple excitation coils and multiple Helmholtz coils, which are staggered around a third central axis perpendicular to the first central axis. The excitation coils are used to pass alternating current to generate a first induced magnetic field, and the Helmholtz coils are used to pass direct current to generate a second induced magnetic field. The multiple first induced magnetic fields and the multiple second induced magnetic fields together synthesize the sub-magnetic field. The magnetic field unit can control the alternating current parameters of the excitation coil and the direct current parameters of the Helmholtz coil to control the parameters of the first induced magnetic field and the second induced magnetic field, thereby controlling the magnitude and direction of the sub-magnetic field vector.
5. The optical fiber twisting device according to claim 4, characterized in that: The excitation coil is provided in three parts, and the Helmholtz coil is provided in three parts. The three excitation coils and the three Helmholtz coils are located at the six vertices of a regular hexagon perpendicular to the third central axis.
6. The optical fiber twisting device according to claim 1, characterized in that: The charge-adding component includes a cathode portion and an anode portion, which are spaced apart along the length of the additional channel. An electron jet groove is defined between the cathode portion and the anode portion and is connected to the additional channel. The cathode portion and the anode portion are used to cooperate with each other to generate charge and add the charge to the surface of the optical fiber passing through the additional channel.
7. The optical fiber twisting device according to claim 1, characterized in that: The fiber twisting device further includes a charge elimination component, which is located on the side of the magnetic field generating component away from the charge addition component along the first direction. The charge elimination component has a charge removal channel for the twisted fiber to pass through and for eliminating the surface charge of the twisted fiber.
8. The optical fiber twisting device according to claim 7, characterized in that: The inner surface of the electrostatic discharge channel is provided with an annular exhaust port, which is connected to an inert gas source. The inert gas source is used to spray a charged inert gas flow through the annular exhaust port. The charged inert gas flow is used to contact the charge on the outer peripheral surface of the optical fiber, thereby eliminating the surface charge of the optical fiber.
9. An optical fiber production system, characterized in that, include: The optical fiber twisting device as described in any one of claims 1 to 8; A traction device for pulling optical fibers so that the optical fibers pass through the optical fiber twisting device.