Optical fiber rotating device and optical fiber drawing system

Abstract

The present invention discloses an optical fiber rotating device, including two transmission belts, both of which are driven to rotate by transmission pulleys, the surfaces of the two transmission belts are arranged opposite to each other and the two adjacent surfaces are used to abut against and clamp the optical fiber, and the two transmission belts are arranged in an X shape; and also discloses an optical fiber drawing system, including a graphite furnace, a bare fiber diameter measuring unit, a coating unit, a curing unit, a coating diameter measuring unit, a traction unit, a tension screening unit and a take-up unit arranged in sequence, and an optical fiber rotating device is arranged between the graphite furnace and the bare fiber diameter measuring unit. The present invention can effectively rotate the optical fiber, has a stable and reliable structure, and has high quality of finished products.

Description

Technical Field

[0001] The invention relates to the field of optical fiber manufacturing, and in particular to an optical fiber rotating device and an optical fiber drawing system. Background Art

[0002] When special optical fibers are used to transmit industrial high-power lasers, it is often necessary to flatten and homogenize the light spots before they can be used. Otherwise, more laser speckles will appear, that is, the power distribution on the two-dimensional plane is uneven. This is because the optical fiber is an axisymmetric tubular channel. When transmitting lasers, the number of modes is relatively limited, and the coupling between the modes is insufficient. After the laser is emitted, a uniform energy plane cannot be formed, which will affect the laser cutting and welding effects in practical applications. The existing laser homogenization scheme is often achieved through secondary shaping of the optical system. Due to the introduction of the intermediate process, the transmission efficiency is reduced, and there are certain safety hazards, which is not very practical. Another solution is to use special-shaped core optical fibers (square core, D-type, etc.), but the preform structure of this special-shaped optical fiber is relatively complex and expensive, and it is not suitable for large-scale promotion. Another way is to directly twist the quartz optical fiber laterally during the optical fiber drawing process, and periodically change the material distribution inside the material, so that the laser is disrupted as much as possible during the optical fiber transmission process, so that the laser is evenly distributed in the optical fiber.

[0003] In traditional optical fiber drawing towers, the optical fiber twisting device is often placed after the optical fiber coating system, as shown in the figure below. The disadvantage is that the twisting of the optical fiber needs to be transmitted to the drawing furnace to cause the twisting of the quartz optical fiber to be effective. If the distance is too far, the mechanical twisting device and the actual optical fiber twisting are not synchronized, and the consistency is poor. In addition, the mechanical twisting device is generally implemented by three twisting wheels. The technology is mature and stable, and patent protection has been applied for. Therefore, it is necessary to conduct effective technical avoidance and propose a new twisting structure. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an optical fiber rotating device and an optical fiber drawing system, which can effectively rotate the optical fiber, have a stable and reliable structure, and have high quality finished products.

[0005] In order to solve the above technical problems, the present invention provides an optical fiber rotation device, including two transmission belts, both of which are driven to rotate by transmission pulleys, the surfaces of the two transmission belts are arranged opposite to each other and the two adjacent surfaces are used to resist and clamp the optical fiber, and the two transmission belts are also arranged in an X shape.

[0006] Furthermore, the transmission pulley is arranged on a swinging base plate, a swinging bearing and a swinging avoidance hole are arranged in the middle of the swinging base plate, the swinging bearing is axially connected to one end of the fixed arm, and the other end of the fixed arm passes through the swinging avoidance hole to be arranged outside, and a locking column is also arranged on the surface of the fixed arm located outside, and a locking plate is arranged on the outer surface of the swinging base plate corresponding to the locking column, and a swinging groove is arranged on the locking plate, and the locking column passes through the swinging groove and cooperates with a locking nut to fix the position of the locking plate.

[0007] Furthermore, the fixed arm is arranged on a lateral moving assembly, and the lateral moving assembly is used to drive the two transmission belts to move closer or farther away.

[0008] Furthermore, a plurality of supporting wheels are arranged on the swing bottom plate, and the supporting wheels support the corresponding transmission belts and protrude to form a pressing portion, and the two transmission belts contact and clamp the optical fiber through the pressing portion.

[0009] Furthermore, swing arms are provided on the two swing base plates of the two transmission belts. The swing arms on the two swing base plates are respectively arranged on the upper and lower parts of the swing bearings. A telescopic adjustment component is also provided between the two swing arms.

[0010] Furthermore, the telescopic adjustment assembly includes a gear box, an upper rack and a lower rack are provided in the gear box, a rotating gear is provided between the upper rack and the lower rack and meshed, the upper rack passes through the gear box and is connected with an upper sliding sleeve, the lower rack passes through the gear box and is connected with a lower sliding sleeve, the upper sliding sleeve is sleeved on an upper sliding rod, the upper sliding rod and the lower sliding rod are respectively fixedly connected to two swing arms, the gear box is provided with a double sliding sleeve outside, the double sliding sleeve is sleeved on a left sliding rod and a right sliding rod, a left sliding sleeve is provided at the end of the left sliding rod, a right sliding sleeve is provided at the end of the right sliding rod, the left sliding sleeve is sleeved on a left fixed sliding rod, the right sliding sleeve is sleeved on a right fixed sliding rod, and the left fixed sliding rod and the right fixed sliding rod are respectively fixedly provided on the ends of two fixed arms.

[0011] Furthermore, an auxiliary gear is also arranged in the gear box, the auxiliary gear is not meshed with the rotating gear, and the auxiliary gear, the upper rack and the lower rack are meshed.

[0012] An optical fiber drawing system comprises a graphite furnace, a bare fiber sizing unit, a coating unit, a curing unit, a coating sizing unit, a traction unit, a tension screening unit and a take-up unit which are arranged in sequence, and an optical fiber rotating device described in any of the above items is arranged between the graphite furnace and the bare fiber sizing unit.

[0013] Beneficial effects of the present invention:

[0014] 1. After the two transmission belts arranged in an X shape clamp the optical fiber and rotate, displacement actions in two directions will be generated, one is a downward pulling force, and the other is a lateral force. For the cylindrical optical fiber, a downward rotation effect is produced, that is, a twisting action, which can meet the needs of optical fiber twisting processing. The device does not use a twisting wheel.

[0015] 2. The device is operated directly at the bottom of the graphite furnace, which can shorten the distance between the optical fiber twisting mechanical system and the hot melting zone of the optical fiber drawing rod to the maximum extent and improve the twisting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the rotating device of the present invention;

[0017] Figure 2 It is a side structural schematic diagram of the present invention;

[0018] Figure 3 It is a rear view structural schematic diagram of the present invention;

[0019] Figure 4 is a schematic diagram of a telescopic adjustment assembly of the present invention;

[0020] Figure 5 It is a schematic diagram of the wire drawing system of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0022] Reference Figure 1 and Figure 2 As shown, an embodiment of the optical fiber rotating device of the present invention includes two transmission belts 1, both of which are driven to rotate by transmission pulleys 2, the surfaces of the two transmission belts are arranged opposite to each other and the two adjacent surfaces are used to abut against and clamp the optical fiber, and the two transmission belts are also arranged in an X shape. The number of transmission pulleys is at least 2, so that the transmission belt can be supported and driven to rotate, and one of the transmission pulleys needs to be connected to a power source, which is a motor. Since the transmission belt is arranged obliquely, the motor and the transmission pulley can be connected through a universal shaft to maintain the stability of the power output without affecting the tilt setting.

[0023] When two transmission belts clamp the optical fiber and are arranged in an X shape, the optical fiber is affected by the two transmission belts and will produce displacement movements in two directions, one is a downward pulling force and the other is a lateral rotational force. The fiber drawing speed generated by the downward pulling force is consistent with the fiber production pulling speed. The lateral rotational force causes the optical fiber to produce a rotation operation, that is, the optical fiber is drawn downward while rotating, that is, the torsion effect. Finely adjusting the relative position angle of the two transmission belts and the rotation speed of the transmission belts can accurately control the speed of the optical fiber rotation. Two pulleys clamping the optical fiber can produce a unidirectional rotation.

[0024] Reference Figures 1 to 4 As shown, the transmission pulley is arranged on the swing base plate 3, a swing bearing 4 and a swing avoidance hole are arranged in the middle of the swing base plate, the swing bearing is connected to one end of the fixed arm 5, and the other end of the fixed arm passes through the swing avoidance hole to the outside, and a locking column 6 is also arranged on the surface of the fixed arm located outside, and a locking plate 7 is arranged on the outer surface of the swing base plate corresponding to the locking column, and a swing groove 8 is arranged on the locking plate, and the locking column passes through the swing groove and cooperates with the locking nut to fix the position of the locking plate. The swing base plate can rotate with the fixed arm through the swing shaft, and the relative positions of the two fixed arms remain unchanged. When the swing base plate rotates, the transmission belt on the swing base plate can be dislocated, and the axial directions of the two swing bearings can be arranged on the same straight line, so it can be quickly adjusted to an X-shaped arrangement by rotation. When the two swing base plates are adjusted to the right position, the locking plate and the locking column are fixed together by the locking nut, that is, the position of the swing base plate is locked.

[0025] Since the optical fiber needs to be clamped, the fixed arm is set on the lateral moving assembly, which is used to drive the two transmission belts to move closer or farther away, so as to facilitate the insertion and clamping of the optical fiber and improve the convenience of operation. A plurality of support wheels 9 are set on the swing bottom plate, and the support wheels support the corresponding transmission belts and protrude to form an extrusion part. The two transmission belts contact and clamp the optical fiber through the extrusion part to ensure the clamping degree of the optical fiber, and the support wheels are a driven structure, which can reduce rotation interference.

[0026] In order to facilitate the adjustment of the misalignment angle of the two transmission belts, swing arms 10 are provided on the two swing bases of the two transmission belts. The swing arms on the two swing bases are respectively arranged at the upper and lower parts of the swing bearings. A telescopic adjustment component 11 is also provided between the two swing arms. The telescopic adjustment component can change the distance between the two ends of the swing arms. The change of the distance can realize the staggered movement effect of the scissors, thereby driving the misalignment of the transmission belts and achieving the purpose of rapid adjustment.

[0027] Specifically, the telescopic adjustment assembly includes a gear box 12, in which an upper rack 13 and a lower rack 14 are provided, a rotating gear is provided between the upper rack and the lower rack and meshed, the rotating gear is connected to the adjusting knob, the upper rack passes through the gear box and is connected to the upper sliding sleeve 15, the lower rack passes through the gear box and is connected to the lower sliding sleeve 16, the upper sliding sleeve is sleeved on the upper sliding rod 17, the upper sliding sleeve is sleeved on the lower sliding rod 18, the upper sliding rod and the lower sliding rod are respectively fixedly connected to the two swing arms, a double sliding sleeve 19 is provided outside the gear box, the double sliding sleeve is sleeved on the left sliding rod 20 and the right sliding rod 21, a left sliding sleeve 22 is provided at the end of the left sliding rod, a right sliding sleeve 23 is provided at the end of the right sliding rod, the left sliding sleeve is sleeved on the left fixed sliding rod 24, the right sliding sleeve is sleeved on the right fixed sliding rod 25, and the left fixed sliding rod and the right fixed sliding rod are respectively fixedly provided on the ends of the two fixed arms. When in use, by turning the adjustment knob, the rotating gear can be driven to rotate, and the rotation of the rotating gear can drive the upper rack upward and the lower rack downward, or drive the upper rack downward and the lower rack upward, that is, the relative movement of the upper rack and the lower rack. While in relative movement, the upper sliding sleeve and the lower sliding sleeve can drive the upper sliding rod and the lower sliding rod to move radially. The upper sliding rod and the lower sliding rod also move relative to each other. The movement of the upper sliding rod and the lower sliding rod can drive the two swing arms to move relative to each other. Since the overall structure is rotation adjustment, the movement path of the end of the swing arm is an arc-shaped path. At this time, the upper sliding rod rotates in the upper sliding sleeve and the lower sliding rod rotates in the lower sliding sleeve, which can effectively offset the rotation restraint and does not affect the adjustment. Since it is an arc-shaped path, it also has a movement amount in the direction of the fixed arm. At this time, the left sliding sleeve, the left fixed sliding rod, the right sliding sleeve and the right fixed sliding rod can automatically offset it. No operation is required, and the movement adjustment is automatic; when the optical fiber is threaded and the clamping force is adjusted, in order to adapt to the displacement of the two fixed arms, the double sliding sleeve, the left sliding rod and the right sliding rod cooperate with each other to achieve adaptive movement. Therefore, the above structure will not interfere when in use, and adjustment only requires turning the adjustment knob, which is convenient and reliable to operate. An auxiliary gear is also provided in the gear box, and the auxiliary gear is not meshed with the rotating gear, and the auxiliary gear, the upper rack and the lower rack are meshed. The auxiliary gear cooperates with the rotating gear to locate the position of the upper rack and the lower rack, so that the movement is smoother and the use stability is good.

[0028] Reference Figure 5As shown, the present application also discloses an optical fiber drawing system, including a graphite furnace 26, a bare fiber sizing unit 27, a coating unit 28, a curing unit 29, a coating sizing unit 30, a traction unit 31, a tension screening unit 32 and a take-up unit 33 arranged in sequence, and the above-mentioned optical fiber rotating device 34 is arranged between the graphite furnace and the bare fiber sizing unit. The rotation device proposed in this patent is placed directly at the lower mouth of the graphite furnace for operation, which can minimize the distance between the optical fiber torsion mechanical system and the hot melting zone of the optical fiber drawing rod and improve the torsion effect. When a single rotation is required, only one optical fiber rotating device is needed. When multi-angle rotation is required, it can be achieved by arranging two or more of the above-mentioned optical fiber rotating devices in sequence.

[0029] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. An optical fiber rotating device, characterized in that: The invention comprises two transmission belts, both of which are driven to rotate by transmission belt wheels, the surfaces of the two transmission belts are arranged opposite to each other and the two adjacent surfaces are used to abut against and clamp the optical fiber, and the two transmission belts are also arranged in an X shape; the transmission belt wheels are arranged on a swinging base plate, a swinging bearing and a swinging avoidance hole are arranged in the middle of the swinging base plate, the swinging bearing is axially connected to one end of the fixed arm, the other end of the fixed arm passes through the swinging avoidance hole to be arranged outside, and a locking column is also arranged on the surface of the fixed arm located outside, a locking plate is arranged on the outer surface of the swinging base plate corresponding to the locking column, a swinging groove is arranged on the locking plate, the locking column passes through the swinging groove and cooperates with a locking nut to fix the position of the locking plate; the fixed arm is arranged on a transverse moving component, and the transverse moving component is used to drive the two transmission belts to approach or move away; a plurality of supporting wheels are arranged on the swinging base plate, and the supporting wheels support the corresponding transmission belts and protrude to be arranged as an extrusion part, and the two transmission belts abut against and clamp the optical fiber through the extrusion part.

2. The optical fiber rotation device according to claim 1, characterized in that: The two swing bottom plates of the two driving belts are both provided with swing arms, the swing arms on the two swing bottom plates are respectively arranged on the upper part and the lower part of the swing bearing, and a telescopic adjustment component is also arranged between the two swing arms.

3. The optical fiber rotation device according to claim 2, characterized in that: The telescopic adjustment assembly includes a gear box, an upper rack and a lower rack are arranged in the gear box, a rotating gear is arranged between the upper rack and the lower rack and meshed, the upper rack passes through the gear box and is connected with an upper sliding sleeve, the lower rack passes through the gear box and is connected with a lower sliding sleeve, the upper sliding sleeve is sleeved on the upper sliding rod, the upper sliding rod and the lower sliding rod are fixedly connected to two swing arms respectively, the gear box is provided with a double sliding sleeve outside, the double sliding sleeve is sleeved on the left sliding rod and the right sliding rod, the left sliding sleeve is provided at the end of the left sliding rod, the right sliding sleeve is provided at the end of the right sliding rod, the left sliding sleeve is sleeved on the left fixed sliding rod, the right sliding sleeve is sleeved on the right fixed sliding rod, and the left fixed sliding rod and the right fixed sliding rod are fixedly arranged on the ends of the two fixed arms respectively.

4. The optical fiber rotation device according to claim 3, characterized in that: An auxiliary gear is also arranged in the gear box, and the auxiliary gear is not meshed with the rotating gear, and the auxiliary gear, the upper rack and the lower rack are meshed with each other.

5. An optical fiber drawing system, comprising a graphite furnace, a bare fiber diameter measuring unit, a coating unit, a curing unit, a coating diameter measuring unit, a pulling unit, a tension screening unit and a take-up unit arranged in sequence, characterized in that: The optical fiber rotating device according to any one of claims 1 to 4 is arranged between the graphite furnace and the bare fiber diameter measuring unit.

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