Optical fiber positioning device

Abstract

The utility model discloses an optical fiber positioning device, relates to the technical field of optical fiber production equipment, and solves the problems that in the optical fiber production process, a double-twisting device uses two guide wheels to jointly twist an optical fiber, an optical fiber coating layer is easy to damage, the surfaces of the guide wheels are easy to damage, the use cost is increased, and the production efficiency is increased. And the optical fiber in the single twisting device is subjected to a certain shearing force, so that online fiber breakage is easily caused. Comprising a positioning wheel and a main traction device, and an optical fiber bypasses the positioning wheel from a vertical state and enters the main traction device in a steering manner; the positioning wheel is connected to the twisting rod, the twisting rod comprises an upper horizontal rod section and a lower vertical rod section, the positioning wheel is rotationally connected to the horizontal rod section, and the vertical rod section is connected to a driving part which drives the vertical rod section to rotate around the axis of the vertical rod section in a reciprocating mode. According to the optical fiber twisting device, the optical fiber can be positioned and can be twisted, and the effect of reducing extra stress applied to the optical fiber while the polarization mode dispersion of the optical fiber is reduced is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber production equipment, and particularly relates to an optical fiber positioning device. Background Art

[0002] During the production process of optical fibers, the preform is first melted into a bare optical fiber at high temperature in a drawing furnace. Two resin protective layers are coated on the surface of the bare fiber, and the protective layers are cured by an ultraviolet curing device. The cured optical fiber is wound by a winding device to maintain continuous production. To ensure geometric parameters such as the non-circularity of the optical fiber cladding and the core-cladding concentricity, as well as high-speed continuous production, a positioning device needs to be installed between the drawing furnace and the winding device to ensure perpendicularity. The positioning device is generally called a positioning wheel and is a basic setting of the drawing system;

[0003] During the propagation of light in an optical fiber, the light propagates along two mutually perpendicular fundamental mode directions, and there is a differential group delay between the two orthogonal fundamental modes. This delay difference is called polarization mode dispersion (PMD), which causes pulse broadening in digital systems and signal distortion in analog systems. To reduce the PMD of the optical fiber, a twisting device needs to be installed between the positioning device and the curing device to reduce the PMD of the optical fiber.

[0004] Currently, there are mainly two types of twisting devices to reduce the polarization mode dispersion of optical fibers: one is a double-twisting device plus a positioning device; the other is a single-twisting device plus a positioning device. However, the double-twisting device uses two guide wheels to twist the optical fiber together, which is likely to cause damage to the coating layer of the optical fiber, and at the same time, the surface of the guide wheel is easily damaged, increasing the use cost. The single-twisting device has a two-wheel structure: one guide wheel is fixed, and the other guide wheel presses against the optical fiber to twist the optical fiber. The optical fiber is subjected to a certain shear force and is prone to in-line fiber breakage. Content of the Utility Model

[0005] The purpose of the utility model is to provide an optical fiber positioning device that can both position the optical fiber and twist the optical fiber, while reducing the polarization mode dispersion of the optical fiber and reducing the additional force applied to the optical fiber.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions:

[0007] An optical fiber positioning device includes a positioning wheel and a main traction device. The optical fiber is in a vertical state, bypasses the positioning wheel, and turns into the main traction device. The positioning wheel is connected to a twisting rod, which includes a horizontal rod section at the upper part and a vertical rod section at the lower part. The positioning wheel is rotatably connected to the horizontal rod section, and the vertical rod section is connected to a driving member that drives it to rotate reciprocally around its own axis.

[0008] By adopting the above technical solution, the positioning wheel and the twisting rod are arranged to realize the twisting of the optical fiber. The rotation of the vertical rod section of the twisting rod can drive the deflection of the positioning wheel to realize twisting, and the structure is simple. At the same time, the positioning wheel positions the optical fiber in the vertical direction, realizing the entire process of positioning and twisting the optical fiber. While ensuring the reduction of polarization mode dispersion of the optical fiber, no additional force is applied to the optical fiber, reducing the on-line fiber breakage of the optical fiber and effectively reducing the production cost.

[0009] Furthermore, it includes a coating cup and a curing furnace arranged in sequence. The optical fiber passes through the coating cup to coat a resin coating and passes through the curing furnace to cure the resin coating, and then bypasses the positioning wheel and enters the main traction device.

[0010] By adopting the above technical solution, a resin protective layer is coated on the surface of the bare optical fiber. The protective layer is cured by an ultraviolet curing device, and the cured optical fiber then passes through the positioning wheel and enters the main traction device, which is tractioned towards the take-up device for take-up to maintain continuous production.

[0011] Furthermore, the driving member includes a transmission belt. One end of the transmission belt is provided with a motor for driving its rotation, and the other end drives the rotation of the vertical rod section of the twisting rod.

[0012] By adopting the above technical solution, the rotation of the transmission belt realizes the rotation of the twisting rod, so that the rotation of the vertical rod section of the twisting rod drives the deflection of the positioning wheel to realize twisting.

[0013] Furthermore, the motor is a servo motor, which continuously rotates forward and backward. The servo motor drives the twisting rod to rotate reciprocally through the transmission belt, and the positioning wheel on the twisting rod deflects reciprocally to twist the optical fiber.

[0014] By adopting the above technical solution, the servo motor can control the speed, and the position accuracy is very accurate. It can convert the voltage signal into torque and rotational speed to drive the transmission belt to rotate, and can convert the received electrical signal into the angular displacement or angular velocity output on the motor shaft, and the control is more accurate, realizing the stable twisting work of the optical fiber.

[0015] Furthermore, the vertical rod section of the twisting rod is rotatably connected to the fixed surface.

[0016] By adopting the above technical solution, the lower end of the twisting rod is rotatably connected to the fixed surface, and the upper end is connected to the positioning wheel, so that the positioning wheel positions the optical fiber in the vertical direction, realizing the entire process of positioning and twisting the optical fiber. While ensuring the reduction of polarization mode dispersion of the optical fiber, no additional force is applied to the optical fiber.

[0017] Furthermore, a V-shaped groove is provided on the outer periphery of the positioning wheel for the optical fiber to pass through. When deflecting reciprocally, the optical fiber continuously contacts the two side surfaces of the V-shaped groove alternately.

[0018] By adopting the above technical solution, the twisting effect on the optical fiber is improved by the two side surfaces of the V-shaped groove.

[0019] Furthermore, a U-shaped groove is provided on the outer periphery of the positioning wheel for the optical fiber to pass through and be limited in the U-shaped groove.

[0020] By adopting the above technical solution, the U-shaped groove facilitates the slight movement and twisting of the optical fiber and reduces the force on the optical fiber.

[0021] Furthermore, the main traction device is located on one side of the positioning wheel. The optical fiber changes from a vertical state, bypasses the positioning wheel and then turns horizontal, and then enters the main traction device.

[0022] By adopting the above technical solution, the positioning wheel positions the optical fiber in the vertical direction, turns the optical fiber from vertical to horizontal, realizes the whole process of positioning and twisting of the optical fiber, and while ensuring the reduction of the polarization mode dispersion of the optical fiber, does not apply additional force to the optical fiber.

[0023] In summary, the present utility model has the following beneficial effects:

[0024] This application can be used for the positioning of optical fibers and the improvement of polarization mode dispersion in the optical fiber production process of optical fiber manufacturing enterprises. It can not only position the optical fiber but also twist the optical fiber. While ensuring the reduction of the polarization mode dispersion of the optical fiber, it does not apply additional force to the optical fiber, reduces the on-line fiber breakage of the optical fiber, and effectively reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 is the overall structural schematic diagram of an optical fiber positioning device of the present utility model;

[0027] Figure 2 is the structural schematic diagram of the twisting rod part in an optical fiber positioning device of the present utility model.

[0028] In the figure, 1, main traction device; 2, positioning wheel; 3, twisting rod; 31, vertical rod section; 32, horizontal rod section; 4, curing furnace; 5, coating cup; 6, transmission belt; 7, motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following further describes the specific embodiments of the present utility model in conjunction with the accompanying drawings. The embodiments do not constitute a limitation to the present utility model. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of this application.

[0030] An optical fiber positioning device, as Figure 1 shown, includes a coating cup 5, a curing furnace 4, a positioning wheel 2, and a main traction device 1 arranged in sequence. The main traction device 1 is located on one side of the positioning wheel 2. The optical fiber passes through the coating cup 5 from a vertical state to coat a resin coating, passes through the curing furnace 4 to cure the resin coating, then bypasses the positioning wheel 2, turns to a horizontal state, and finally enters the main traction device 1 and is tractioned towards the take-up device for winding. Among them, the positioning wheel 2 positions the optical fiber in the vertical direction;

[0031] The surface of the bare optical fiber is coated with a resin protection layer, and the protection layer is cured by an ultraviolet curing device. The cured optical fiber then passes through the positioning wheel 2 and enters the main traction device 1, and is tractioned towards the take-up device for winding to maintain continuous production.

[0032] As Figure 1 and Figure 2 shown, the positioning wheel 2 is connected to a twisting rod 3. The twisting rod 3 is L-shaped and includes a horizontal rod section 32 in the upper part and a vertical rod section 31 in the lower part. The positioning wheel 2 is rotatably connected to the horizontal rod section 32. The twisting rod 3 can also be set as an inverted U shape, and the bottom is connected to a turntable to improve its structural stability. The vertical rod section 31 is connected to a driving member that drives it to rotate reciprocally around its own axis;

[0033] In this embodiment, the driving member includes a transmission belt 6. One end of the transmission belt 6 is provided with a motor 7 that drives its rotation, and the other end drives the vertical rod section 31 of the twisting rod 3 to rotate. Specifically, the lower end of the vertical rod section 31 of the twisting rod 3 is rotatably connected to a fixed surface, and the motor 7 is also fixed on the fixed surface. The driving method of the motor 7 and the twisting rod 3 can also be replaced by a transmission method such as gears, and the transmission belt 6 can also be replaced by a structure such as a timing belt;

[0034] The positioning wheel 2 positions the optical fiber in the vertical direction. At the same time, the rotation of the transmission belt 6 realizes the rotation of the twisting rod 3, so that the rotation of the vertical rod section 31 of the twisting rod 3 drives the deflection of the positioning wheel 2 to realize twisting. The entire process of positioning and twisting of the optical fiber is realized. While ensuring the reduction of the polarization mode dispersion of the optical fiber, no additional force is applied to the optical fiber, reducing the on-line fiber breakage of the optical fiber and effectively reducing the production cost.

[0035] Among them, as Figure 1 and Figure 2As shown, the motor 7 is a servo motor which rotates forward and backward continuously. It drives the twisting rod 3 to rotate reciprocally through the transmission belt 6. The positioning wheel 2 on the twisting rod 3 deflects reciprocally to twist the optical fiber. It can convert the received electrical signal into the angular displacement or angular velocity output on the motor shaft, with more accurate control, and realize the stable twisting work of the optical fiber. It can also be controlled to rotate forward and backward through means such as PLC and the central control computer.

[0036] The outer periphery of the positioning wheel 2 is provided with a V-shaped groove for the optical fiber to pass through. When deflecting reciprocally, the optical fiber continuously contacts the two side surfaces of the V-shaped groove alternately. The outer periphery of the positioning wheel 2 can also be a U-shaped groove for the optical fiber to pass through and be limited in the U-shaped groove to adapt to a larger deflection angle.

[0037] Working principle:

[0038] 1. The bare optical fiber is coated with one or more resin coatings through the coating cup 5, and the resin coating is cured in the curing furnace 4.

[0039] 2. The cured optical fiber passes through the positioning wheel 2 to achieve vertical positioning.

[0040] 3. The cured optical fiber enters the main traction to ensure the continuous production of the optical fiber.

[0041] 4. The motor 7 rotates forward and backward continuously, driving the twisting rod 3 to reciprocally rub through the transmission belt 6.

[0042] 5. The positioning wheel 2 is installed on the twisting rod 3. The twisting rod 3 drives the positioning wheel 2 to deflect a certain angle forward and backward along the plane perpendicular to the optical fiber and tangent to the positioning wheel 2 to realize the twisting of the optical fiber.

[0043] 6. The positioning wheel 2 positions the optical fiber in the vertical direction and at the same time realizes the twisting of the optical fiber.

[0044] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the technical solution of the present invention.

Claims

1. An optical fiber positioning device, characterized in that: It includes a positioning wheel and a main traction device. The optical fiber, from a vertical state, bypasses the positioning wheel and turns to enter the main traction device. The positioning wheel is connected to a twisting rod, which includes a horizontal rod section at the upper part and a vertical rod section at the lower part. The positioning wheel is rotatably connected to the horizontal rod section, and the vertical rod section is connected to a driving member that drives it to reciprocally rotate around its own axis.

2. The optical fiber positioning device according to claim 1, wherein: It includes a coating cup and a curing furnace arranged in sequence. The optical fiber is coated with a resin coating through the coating cup, the resin coating is cured through the curing furnace, and then bypasses the positioning wheel and enters the main traction device.

3. The optical fiber positioning device according to claim 1, characterized in that: The driving member includes a transmission belt. One end of the transmission belt is provided with a motor that drives it to rotate, and the other end drives the vertical rod section of the twisting rod to rotate.

4. The optical fiber positioning device according to claim 3, wherein: The motor is a servo motor, which continuously rotates forward and backward, drives the twisting rod to reciprocally rotate through the transmission belt, and the positioning wheel on the twisting rod reciprocally deflects to twist the optical fiber.

5. The optical fiber positioning device according to claim 1 or 3, characterized in that: The vertical rod section of the twisting rod is rotatably connected to a fixed surface.

6. The optical fiber positioning device according to claim 1, wherein: The outer periphery of the positioning wheel is provided with a V-shaped groove for the optical fiber to pass through. When reciprocally deflecting, the optical fiber continuously alternately contacts the two side surfaces of the V-shaped groove.

7. The optical fiber positioning device according to claim 1, characterized in that: The outer periphery of the positioning wheel is provided with a U-shaped groove for the optical fiber to pass through and be limited in the U-shaped groove.

8. A fiber optic positioning device according to claim 1 or 2, characterized in that: The main traction device is located on one side of the positioning wheel. The optical fiber, from a vertical state, turns to horizontal after bypassing the positioning wheel and then enters the main traction device.

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