Optical fiber removal torsional force device

Abstract

The present application provides an optical fiber torsional force removal device, comprising a rotating frame and a non-rotating frame, wherein a rotatable fiber-releasing disk is provided on the rotating frame, and a rotatable fiber-collecting disk is provided on the non-rotating frame, and a first clamp device and a second clamp device are sequentially provided between the fiber-collecting disk and the fiber-releasing disk, wherein the first clamp device is provided on the non-rotating frame, and the second clamp device is provided on the rotating frame, and a laser interference device is further provided between the first clamp device and the second clamp device, wherein the optical fiber starts from the fiber-releasing disk, passes through the second clamp device, the laser interference device and the first clamp device sequentially, and then reaches the fiber-collecting disk, thereby solving the problem of torsional force removal during optical fiber drawing.

Description

Technical Field

[0001] The invention relates to the field of optical fiber manufacturing, and in particular to an optical fiber torsional force removal device. Background Art

[0002] The manufacturing of optical fiber is to draw the fiber rod from the glass state after high temperature melting, and then quickly cool it down to form an optical fiber that can guide light. During the rapid drawing process, the optical fiber is quickly rolled up and collected into the optical fiber reel. The optical fiber forming generally ranges from a few hundred meters to tens of kilometers. During the drawing, rapid cooling and rolling process, the rolled optical fiber will accumulate a lot of torsional force. Short-distance optical fiber can be cut off to make the optical fiber naturally relax and release the torque in the optical fiber naturally. However, long-distance optical fiber cannot relax naturally when curled, and the torque cannot be released.

[0003] Optical fibers are currently widely used in fiber lasers, and the torsional force of optical fibers has a great influence on the gain fibers or optical fiber devices. For example, in the process of winding the gain fiber of a fiber laser, the gain fiber needs to be cut in advance to allow it to relax naturally, release the torsional force in the light, and then be wound on the fiber water cooling tank. If the torsional force of the optical fiber is not completely released, the coiled optical fiber will increase the loss of laser transmission and reduce the performance of the laser. In addition, over a long period of accumulation, the optical fiber will slowly release the torsional force, which will eventually be transmitted to the fusion points at both ends of the optical fiber, causing the fusion point loss to increase or break, resulting in reduced laser performance or laser burnout. The torsional force of optical fibers also has a huge impact on the manufacturing of optical fiber devices. For example, in the manufacture of fiber grating arrays, after processing a section of grating and moving to the next section of optical fiber, due to torsion, the grating processed in the second section has a radial angle with the first section of grating, which affects the performance of the grating array. This phenomenon exists in both polarization-maintaining and non-polarization-maintaining fiber grating array processing. Therefore, the torsional force on the optical fiber exit is a common problem that is prevalent in the current industry. Summary of the invention

[0004] The invention provides a device for removing torsional force of optical fiber, which solves the problem of removing torsional force of drawn optical fiber.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a fiber optic torsional force removal device, including a rotating frame and a non-rotating frame, the rotating frame is provided with a rotatable fiber release disk, the non-rotating frame is provided with a rotatable fiber collection disk, a first clamping device and a second clamping device are arranged in sequence between the fiber collection disk and the fiber release disk, the first clamping device is arranged on the non-rotating frame, and the second clamping device is arranged on the rotating frame, and a laser interference device is also arranged between the first clamping device and the second clamping device. The optical fiber starts from the fiber release disk, passes through the second clamping device, the laser interference device and the first clamping device in sequence, and then reaches the fiber collection disk.

[0006] In a preferred solution, a linear moving module is further provided, the linear moving module is provided with a moving platform that can move toward the rotating frame, and the non-rotating frame is arranged on the moving platform.

[0007] In a preferred embodiment, the laser interferometer device includes a laser, a collimating and expanding lens group and a beam splitter are provided at the front end of the laser, a first reflector is provided on one side of the beam splitter, a second reflector is provided on the other side, a beam combiner and a detector are provided, a twist-free optical fiber is placed between the beam splitter and the first reflector, and an optical fiber to be tested is placed between the second reflector and the beam combiner. Light is emitted from the laser and passes through the beam splitter to irradiate the beam splitter to separate a first light and a second light. The first light passes through the twist-free optical fiber and is reflected by the first reflector to the beam combiner. The second light is reflected by the second reflector and passes through the optical fiber to be tested to reach the beam combiner. The first light and the second light are combined by the beam combiner and irradiated to the detector.

[0008] In the preferred scheme, a second buffer tensioning wheel group is provided between the fiber collecting disk and the first clamping device, a third buffer tensioning wheel group is provided between the first clamping device and the second clamping device, the third buffer tensioning wheel group is arranged on the non-rotating frame, and a first buffer tensioning wheel group is provided between the second clamping device and the fiber releasing disk.

[0009] In the preferred scheme, the first buffer tensioning wheel group includes two first limiting wheels, a first dancing wheel is provided between the two first limiting wheels, the first dancing wheel is provided on one side of the line connecting the two first limiting wheels, the optical fiber bypasses the first limiting wheel and the first dancing wheel, and a first swing arm is provided. The middle part of the first swing arm is hinged to the rotating frame and a first encoder is provided at the hinge. One end of the first swing arm is rotatably connected to the first dancing wheel, and a counterweight is provided at the other end of the first swing arm. A tension spring is also provided on the side of the first swing arm on the rotating frame away from the first limiting wheel, and the tension spring is connected between the first encoder and the first dancing wheel on the first swing arm.

[0010] In the preferred scheme, the second buffer tensioning wheel group and the third buffer tensioning wheel group both include two second limiting wheels, a second dancing wheel is provided between the two second limiting wheels, the second dancing wheel is provided on the lower side of the line connecting the two second limiting wheels, the optical fiber bypasses the second limiting wheel and then bypasses the second dancing wheel from the lower side, and a second swing arm is also provided, one end of the second swing arm is hinged to the rotating frame and a second encoder is provided at the hinge, and one end of the second swing arm is rotatably connected to the second dancing wheel.

[0011] In a preferred embodiment, the first clamp device and the second clamp device both include a first traction wheel group and a second traction wheel group, the first traction wheel group and the second traction wheel group include a driving wheel and a driven wheel, a traction belt is wound between the driving wheel and the driven wheel, an optical fiber channel is provided between the traction belt of the first traction wheel group and the traction belt of the second traction wheel group, and a clamping block is provided on the side of each traction belt away from the optical fiber channel, and the clamping block is abutted against the traction belt.

[0012] In a preferred solution, a stopper and a stop seat are respectively provided on the two clamping blocks, the stopper is provided with a retractable stop rod, and the end of the stop rod stops on the stop seat.

[0013] In a preferred embodiment, a pusher is provided on the side of each clamping block away from the traction belt. The pusher includes a base, a threaded sleeve is provided in the base, a slidable push rod is provided in the sleeve, a pressing plate is provided at one end of the push rod to abut against the clamping block, and a spring is provided between the sleeves.

[0014] In the preferred scheme, the rotating frame includes a transverse connecting plate and a longitudinal connecting plate, the fiber release plate is arranged on the transverse connecting plate, the second clamping device is arranged on the longitudinal connecting plate, one end of the rotating frame is provided with a rotating shaft portion, the other end of the rotating frame is provided with an annular end frame plate, a bearing seat and a rotatable abutment wheel are also provided, the abutment wheel abuts against the lower end surface of the annular end frame plate, the rotating shaft portion is rotatably connected to the bearing seat, a U-shaped groove is provided in the center of the annular end frame plate, and a splicing plate is provided at the opening of the U-shaped groove.

[0015] The beneficial effects of the present invention are as follows: a relatively rotatable fiber-releasing and fiber-retracting mechanism is used to detwist the optical fiber and release the torque during the optical fiber transfer process; laser interference is used to contactlessly measure the optical fiber torsion to avoid damaging the optical fiber; a traction belt is used as a clamping device to increase the contact area and avoid local damage to the optical fiber; the traction belt can assist the movement of the optical fiber in the middle section and keep the optical fiber position constant at the rotation center axis position, and in conjunction with a buffer tensioning device, continuous detwist can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a schematic diagram of the intermittent back-twist mechanism.

[0018] Figure 2 It is a schematic diagram of a continuous back-twist mechanism.

[0019] Figure 3 It is a schematic diagram of the mechanism on a non-rotating frame.

[0020] Figure 4 It is a schematic diagram of the mechanism on the rotating frame.

[0021] Figure 5 is a schematic diagram of the clamp device.

[0022] Figure 6 Schematic diagram of the continuous pushing structure of the clamp device.

[0023] Figure 7 It is a schematic diagram of the rotating frame splicing structure.

[0024] Figure 8 This is a structural diagram of the limit roller assembly.

[0025] Fig. 9 This is the schematic diagram of the laser interferometer device.

[0026] In the figure: a fiber collection disk 1; a first clamp device 2; a first traction wheel group 201; a second traction wheel group 202; an optical fiber channel 203; a driven wheel 204; a driving wheel 205; a traction belt 206; a clamping block 207; a stop seat 208; a stopper 209; a stop rod 210; a linear motion module 3; a moving platform 301; a rotating frame 4; a horizontal connecting plate 401; a longitudinal connecting plate 402; an annular end frame plate 403; a rotating shaft 404; a splicing plate 405; a U-shaped groove 406; a second clamp device 5; a fiber release disk 6; a laser interference device 7; a laser 701; a collimating beam expander group 702; a beam splitter 703; a twist-free optical fiber 704; a first reflector 705; a second reflector 706; an optical fiber to be tested 707 ; beam combiner 708; detector 709; non-rotating frame 8; first buffer tension wheel group 9; first swing arm 901; first dancing wheel 902; first encoder 903; first limit wheel 904; counterweight 905; tension spring 906; second buffer tension wheel group 10; second swing arm 1001; second dancing wheel 1002; second encoder 1003; second limit wheel 1004; third buffer tension wheel group 11; ejector 13; sleeve 1301; push rod 1302; pressing plate 1303; spring 1304; base 1305; abutment wheel 14; frame driving motor 15; bearing seat 16; limit roller assembly 17; roller group 1701; roller shaft 1702; optical fiber passing through gap 1703. DETAILED DESCRIPTION

[0027] Embodiment 1: like Figure 1-9 In the invention, a device for removing torsion force of optical fiber is provided, comprising a rotating frame 4 and a non-rotating frame 8, wherein a rotatable fiber-releasing disk 6 is provided on the rotating frame 4, and a rotatable fiber-collecting disk 1 is provided on the non-rotating frame 8, and a first clamping device 2 and a second clamping device 5 are provided in sequence between the fiber-collecting disk 1 and the fiber-releasing disk 6, the first clamping device 2 is provided on the non-rotating frame 8, and the second clamping device 5 is provided on the rotating frame 4, and a laser interference device 7 is further provided between the first clamping device 2 and the second clamping device 5, and the optical fiber starts from the fiber-releasing disk 6, passes through the second clamping device 5, the laser interference device 7 and the first clamping device 2 in sequence, and then reaches the fiber-collecting disk 1.

[0028] The rotating shaft of the rotating frame 4 is perpendicular to the rotating shaft of the fiber receiving disc 1 and the rotating shaft of the fiber placing disc 6 .

[0029] The lower ends of the fiber collection disk 1 and the fiber laying disk 6 are driven by a torque turntable.

[0030] A limiting roller assembly 17 is provided on the side close to the first clamping device 2 and the second clamping device 5. The limiting roller assembly 17 includes two orthogonal roller groups 1701. The roller group 1701 includes two parallel roller shafts 1702. A fiber passage gap 1703 is provided between the two roller shafts 1702. The two limiting roller assemblies 17 can limit the optical fiber on the axis of the rotating shaft of the rotating frame 4, ensuring that the optical fiber rotates back torsion but does not swing around the axis.

[0031] In a preferred solution, a linear moving module 3 is further provided. The linear moving module 3 is provided with a moving platform 301 which can move toward the rotating frame 4 . The non-rotating frame 8 is provided on the moving platform 301 .

[0032] The linear motion module 3 includes a lead screw, a guide rail, and a slider. The moving platform 301 is slidably connected to the guide rail through the slider. A nut is provided on the moving platform 301 and is sleeved with the lead screw. A servo motor is used to drive the moving platform 301 to move.

[0033] In a preferred embodiment, the laser interferometer 7 includes a laser 701, a collimating and expanding lens group 702 and a beam splitter 703 are provided at the front end of the laser 701, a first reflector 705 is provided on one side of the beam splitter 703, a second reflector 706 is provided on the other side, a beam combiner 708 and a detector 709 are also provided, a twist-free optical fiber 704 is placed between the beam splitter 703 and the first reflector 705, and a fiber to be tested 707 is placed between the second reflector 706 and the beam combiner 708, light is emitted from the laser 701, passes through the beam splitter 703 and irradiates the beam splitter 703 to separate a first light and a second light, the first light passes through the twist-free optical fiber 704 and is reflected by the first reflector 705 to the beam combiner 708, the second light passes through the fiber to be tested 707 and reaches the beam combiner 708 after being reflected by the second reflector 706, and the first light and the second light are combined by the beam combiner 708 and irradiated to the detector 709.

[0034] Since the refractive index of the optical fiber will change after being twisted, the phase of the light will change after passing through. After interference superposition, the interference pattern will be different from that of the untwisted optical fiber, resulting in local interference fringe distortion. Therefore, the distortion of the optical fiber 707 to be tested can be determined based on the moral image detected by the detector 709.

[0035] If the non-rotating frame 8 is moved by the linear moving module 3, the working mode is that each time the fiber unwinding disc 6 unwinds a section of optical fiber, the first clamping device 2 and the second clamping device 5 are clamped, and the movable platform 301 moves to the farthest end to straighten the optical fiber, and then the rotating frame 4 rotates to untwist, and after the laser interference device 7 detects that the torque of the optical fiber is eliminated, the first clamping device 2 is released, and the non-rotating frame 8 moves toward the rotating frame 4 while the fiber winding disc 1 winds up, and after winding up this section, the operation is repeated to untwist the next section.

[0036] In the preferred scheme, a second buffer tensioning wheel group 10 is provided between the fiber collecting disk 1 and the first clamping device 2, a third buffer tensioning wheel group 11 is provided between the first clamping device 2 and the second clamping device 5, the third buffer tensioning wheel group 11 is arranged on the non-rotating frame 8, and a first buffer tensioning wheel group 9 is provided between the second clamping device 5 and the fiber releasing disk 6.

[0037] Since a tension buffer device is installed between each section of the fiber receiving tray 1, the first clamp device 2, the second clamp device 5 and the fiber placing tray 6, the optical fiber is prevented from being broken due to asynchronous control. Since the rotating frame 4 needs to rotate, only one tension buffer device is installed on the rotating frame 4 to reduce the complexity of the mechanism, and the other two are installed on the non-rotating frame 8.

[0038] In the preferred embodiment, the first buffer tensioning wheel group 9 includes two first limiting wheels 904, a first dancing wheel 902 is provided between the two first limiting wheels 904, the first dancing wheel 902 is provided on one side of the line connecting the two first limiting wheels 904, the optical fiber bypasses the first limiting wheel 904 and the first dancing wheel 902, and a first swing rod 901 is also provided. The middle part of the first swing rod 901 is hinged to the rotating frame 4 and a first encoder 903 is provided at the hinge. One end of the first swing rod 901 is rotatably connected to the first dancing wheel 902, and a counterweight block 905 is provided at the other end of the first swing rod 901. A tension spring 906 is also provided on the side of the first swing rod 901 on the rotating frame 4 away from the first limiting wheel 904, and the tension spring 906 is connected to the position between the first encoder 903 and the first dancing wheel 902 on the first swing rod 901.

[0039] Since the rotating frame 4 needs to rotate, a counterweight block 905 of the same weight as the first dancing wheel 902 is used to balance the gravity, and the tension of the optical fiber is provided by the tension of the tension spring 906. Therefore, no matter to which angle the rotating frame 4 rotates, the first buffer tensioning wheel set 9 can ensure the tensioning effect.

[0040] In the preferred embodiment, the second buffer tensioning wheel group 10 and the third buffer tensioning wheel group 11 both include two second limiting wheels 1004, a second dancing wheel 1002 is provided between the two second limiting wheels 1004, the second dancing wheel 1002 is provided on the lower side of the line connecting the two second limiting wheels 1004, the optical fiber bypasses the second limiting wheels 1004 and then bypasses the second dancing wheel 1002 from the lower side, a second swing arm 1001 is also provided, one end of the second swing arm 1001 is hinged to the rotating frame 4 and a second encoder 1003 is provided at the hinge, and one end of the second swing arm 1001 is rotatably connected to the second dancing wheel 1002.

[0041] Since the non-rotating frame 8 does not rotate, the structures of the second buffer tensioning wheel set 10 and the third buffer tensioning wheel set 11 are relatively simple, and the second dancing wheel 1002 tensions the optical fiber by gravity.

[0042] Even if there is a control asynchronism among the fiber collecting disc 1, the first clamp device 2, the second clamp device 5 and the fiber releasing disc 6, the rotation direction of the swing rod can be monitored to guide the actions of the first clamp device 2 and the second clamp device 5, as well as the rotation speeds of the fiber collecting disc 1 and the fiber releasing disc 6, so as to quickly adjust the dancing wheel position and ensure that the tension is within a reasonable dynamic range.

[0043] When the linear moving module 3 is used to drive the fiber collection tray 1 and the non-rotating frame 8 to periodically approach and move away from the rotating frame 4, the optical fiber is frequently in a relaxed and tensioned state. In the relaxed state, due to the limited displacement angle of the swing arm of the third buffer tensioning wheel group 11, failure may occur, causing the optical fiber to fall out. When tensioning, the optical fiber is pulled, and if the moving platform 301 moves too fast, the optical fiber may be torn.

[0044] In addition, each time the optical fiber is loosened and tightened, the optical fiber may be repositioned at the laser interference device 7 and may become inaccurate, thus affecting the interference monitoring image.

[0045] In a preferred embodiment, the first clamp device 2 and the second clamp device 5 both include a first traction wheel group 201 and a second traction wheel group 202, the first traction wheel group 201 and the second traction wheel group 202, the first traction wheel group 201 and the second traction wheel group 202 include a driving wheel 205 and a driven wheel 204, a traction belt 206 is wound between the driving wheel 205 and the driven wheel 204, an optical fiber channel 203 is provided between the traction belt 206 of the first traction wheel group 201 and the traction belt 206 of the second traction wheel group 202, and a clamping block 207 is provided on the side of each traction belt 206 away from the optical fiber channel 203, and the clamping block 207 is close to the traction belt 206.

[0046] A traction belt 206 is used to replace the opening and closing clamp, and a driving motor is provided on one side of the driving wheel 205. Since the traction belt 206 has a larger contact area with the optical fiber and the traction belt 206 itself is made of flexible material, the damage to the optical fiber is relatively small.

[0047] And because the first traction wheel group 201 and the second traction wheel group 202 have driving capabilities, they can form auxiliary support and relay pulling between the fiber collection disk 1 and the fiber release disk 6, and the optical fiber can choose to move continuously or stop moving. During this process, the optical fiber can always maintain a stable tension and the light will not escape from the dancing wheel.

[0048] Since the position of the optical fiber at the laser interference device 7 remains unchanged, the laser interference device 7 can continuously perform interference detection, feed back the results to the controller, and adjust the rotation speed of the rotating frame 4 in real time. In this mode, the optical fiber can be continuously transferred from the fiber release disk 6 to the fiber collection disk 1, thereby improving the detwisting efficiency of the device.

[0049] In a preferred solution, a stopper 209 and a stopper seat 208 are respectively provided on the two clamping blocks 207 . The stopper 209 is provided with a retractable stopper rod 210 , and the end of the stopper rod 210 stops on the stopper seat 208 .

[0050] The stopper 209 is the main structure of the screw micrometer, and the stopper rod 210 is equivalent to the measuring rod. The stopper rod 210 is threadedly connected to the stopper 209. The adjustment cylinder of the stopper 209 can be rotated to adjust the extension length of the stopper rod 210. The outer wall of the stopper 209 is provided with a scale, and the width of the optical fiber channel 203 can be adjusted according to the diameter of the optical fiber to avoid damaging the optical fiber.

[0051] In the preferred embodiment, a pusher 13 is provided on the side of each clamping block 207 away from the traction belt 206, and the pusher 13 includes a base 1305, a threaded sleeve 1301 is provided in the base 1305, a slidable push rod 1302 is provided in the sleeve 1301, a pressing plate 1303 is provided at one end of the push rod 1302, and a spring 1304 is provided between the sleeve 1301 and the sleeve 1301.

[0052] The extension length of the sleeve 1301 is adjustable. One end of the push rod 1302 is connected to the pressing plate 1303 , and the other end is provided with a nut to prevent the push rod 1302 from slipping out of the sleeve 1301 .

[0053] The push rod 1302 continuously presses the clamping block 207 , and the clamping block 207 squeezes the traction belt 206 so that the traction belt 206 clamps the optical fiber.

[0054] In the preferred embodiment, the rotating frame 4 includes a transverse connecting plate 401 and a longitudinal connecting plate 402, the fiber release plate 6 is arranged on the transverse connecting plate 401, the second clamp device 5 is arranged on the longitudinal connecting plate 402, one end of the rotating frame 4 is provided with a rotating shaft portion 404, the other end of the rotating frame 4 is provided with an annular end frame plate 403, a bearing seat 16 and a rotatable abutment wheel 14, the abutment wheel 14 abuts against the lower end surface of the annular end frame plate 403, the rotating shaft portion 404 is rotatably connected with the bearing seat 16, a U-shaped groove 406 is provided in the center of the annular end frame plate 403, and a splicing plate 405 is provided at the opening of the U-shaped groove 406.

[0055] The frame driving motor 15 drives the rotating shaft portion 404 to rotate through a synchronous belt mechanism.

[0056] The splicing plate 405 and the annular end frame plate 403 are installed by bolts and are detachable, so as to facilitate the taking and placing of optical fibers.

[0057] The abutting wheel 14 and the bearing seat 16 form a double-support structure to prevent the far end from swinging during rotation due to the excessive weight of the rotating frame 4.

[0058] Embodiment 2: An optical fiber torsion removal device, wherein a rolled optical fiber disk is placed on the right, and a rotating motor is placed below the optical fiber disk, which can make the optical fiber disk rotate in the horizontal direction to release the optical fiber, and the optical fiber disk and the rotating motor are placed on the rotating motor as a whole, and the rotating motor can drive the optical fiber disk and the rotating motor as a whole to rotate in the vertical direction; The empty optical fiber reel is placed on the left side, and there is a rotating motor under the optical fiber reel. The rotating standby drives the optical fiber reel to rotate horizontally to reel in the optical fiber that has been detorqued. The rotating motor and the optical fiber reel are placed on a linear motor slide of a certain length as a whole to move back and forth.

[0059] The overall detorsion process of the structure is as follows: the optical fiber reel is placed on the rotating motor, the optical fiber is manually or automatically pulled through the automatic clamp and the automatic clamp, and the optical fiber head is fixed on the optical fiber reel. The optical fiber reel has no optical fiber in the initial state.

[0060] The motor is in the locked state when it is powered on. After the fiber head is glued to the fiber reel, the automatic clamp locks the fiber. There is a laser interference measurement area between the two clamps. The torsion in the fiber can be identified by the laser interference image. After judging that there is torsional force in the fiber, the rotary motor rotates back and forth in the vertical direction to drive the automatic clamp, the rotating unit, and the fiber reel to rotate together. The torsion degree of the fiber is judged by real-time monitoring of the laser interference image. When the torsion retreats to an acceptable range, the automatic clamp is released, the rotary motor drives the fiber reel to rotate, and at the same time, the linear motor slide drives the rotary motor and the fiber reel to move synchronously to the right, and the section of fiber that has been freed of torsional force is rolled onto the fiber reel.

[0061] After the wire is collected, the automatic clamp is released and locked, and the linear motor slide moves to the left. At the same time, the rotary motor moves synchronously to realize the wire releasing process. After reaching the left side of the linear slide, the automatic clamp is locked, and then the wire collection and release process is repeated, so that the entire roll of optical fiber can be withdrawn from the torsional force.

[0062] In the interference principle diagram, a line laser is used as the detection light source. After the line laser is output, it is expanded and collimated by a lens group, diverged to a certain size, and then divided into two lasers by a beam splitter. The light path passes through a torque-free optical fiber of the same size, and the light path passes through the optical fiber to be measured. The two light paths are combined by the beam splitter to interfere, and the interference image is collected by the detector. The interference pattern is analyzed by an algorithm to determine the torsional direction of the optical fiber and control the rotational detorsion of the optical fiber.

[0063] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An optical fiber torsional force removal device, characterized by: The invention comprises a rotating frame (4) and a non-rotating frame (8); a rotatable fiber laying disk (6) is provided on the rotating frame (4); a rotatable fiber collecting disk (1) is provided on the non-rotating frame (8); a first clamping device (2) and a second clamping device (5) are provided in sequence between the fiber collecting disk (1) and the fiber laying disk (6); the first clamping device (2) is provided on the non-rotating frame (8); the second clamping device (5) is provided on the rotating frame (4); a laser interference device (7) is provided between the first clamping device (2) and the second clamping device (5); an optical fiber starts from the fiber laying disk (6), passes through the second clamping device (5), the laser interference device (7) and the first clamping device (2) in sequence, and then reaches the fiber collecting disk (1).

2. The optical fiber torsional force removal device according to claim 1, characterized in that: A linear moving module (3) is also provided, and the linear moving module (3) is provided with a moving platform (301) that can move toward the rotating frame (4), and the non-rotating frame (8) is arranged on the moving platform (301).

3. The optical fiber torsional force removal device according to claim 1, characterized in that: The laser interference device (7) comprises a laser (701), wherein a collimating beam expander group (702) and a beam splitter (703) are provided at the front end of the laser (701), a first reflector (705) is provided on one side of the beam splitter (703), a second reflector (706) is provided on the other side, a beam combiner (708) and a detector (709) are also provided, a twist-free optical fiber (704) is placed between the beam splitter (703) and the first reflector (705), and a twist-free optical fiber (704) is placed between the second reflector (706) and the beam combiner (708). The optical fiber to be tested (707) is emitted from a laser (701) and passes through a beam splitter (703) to irradiate the beam splitter (703) to split a first light ray and a second light ray. The first light ray passes through a twist-free optical fiber (704) and is reflected by a first reflector (705) to a beam combiner (708). The second light ray is reflected by a second reflector (706) and passes through the optical fiber to be tested (707) to reach the beam combiner (708). The first light ray and the second light ray are combined by the beam combiner (708) and irradiate a detector (709).

4. The optical fiber torsional force removal device according to claim 1, characterized in that: A second buffer tension wheel assembly (10) is provided between the fiber collection disc (1) and the first clamp device (2), a third buffer tension wheel assembly (11) is provided between the first clamp device (2) and the second clamp device (5), the third buffer tension wheel assembly (11) is arranged on the non-rotating frame (8), and a first buffer tension wheel assembly (9) is provided between the second clamp device (5) and the fiber release disc (6).

5. The optical fiber torsional force removal device according to claim 4, characterized in that: The first buffer tension wheel assembly (9) comprises two first limit wheels (904), a first dancing wheel (902) is arranged between the two first limit wheels (904), the first dancing wheel (902) is arranged on one side of the connection line of the two first limit wheels (904), the optical fiber bypasses the first limit wheel (904) and the first dancing wheel (902), and a first swing rod (901) is also provided, the middle part of the first swing rod (901) is hinged to the rotating frame (4) and a first encoder (903) is provided at the hinge, one end of the first swing rod (901) is rotatably connected to the first dancing wheel (902), the other end of the first swing rod (901) is provided with a counterweight (905), and a tension spring (906) is also provided on the side of the first swing rod (901) on the rotating frame (4) away from the first limit wheel (904), and the tension spring (906) is connected to the position between the first encoder (903) and the first dancing wheel (902) on the first swing rod (901).

6. The optical fiber torsional force removal device according to claim 4, characterized in that: The second buffer tension wheel group (10) and the third buffer tension wheel group (11) both comprise two second limit wheels (1004), a second dancing wheel (1002) is provided between the two second limit wheels (1004), the second dancing wheel (1002) is provided at the lower side of the line connecting the two second limit wheels (1004), the optical fiber bypasses the second limit wheels (1004) and then bypasses the second dancing wheel (1002) from the lower side, a second swing rod (1001) is also provided, one end of the second swing rod (1001) is hinged to the rotating frame (4), and a second encoder (1003) is provided at the hinge, and one end of the second swing rod (1001) is rotatably connected to the second dancing wheel (1002).

7. The optical fiber torsional force removal device according to claim 4, characterized in that: The first clamp device (2) and the second clamp device (5) both comprise a first traction wheel group (201) and a second traction wheel group (202), the first traction wheel group (201) and the second traction wheel group (202), the first traction wheel group (201) and the second traction wheel group (202) comprising a driving wheel (205) and a driven wheel (204), a traction belt (206) being wound between the driving wheel (205) and the driven wheel (204), an optical fiber channel (203) being provided between the traction belt (206) of the first traction wheel group (201) and the traction belt (206) of the second traction wheel group (202), a clamping block (207) being provided on a side of each traction belt (206) away from the optical fiber channel (203), the clamping block (207) being in contact with the traction belt (206).

8. The optical fiber torsional force removal device according to claim 7, characterized in that: A stopper (209) and a stop seat (208) are respectively provided on the two clamping blocks (207); the stopper (209) is provided with a retractable stop rod (210); and the end of the stop rod (210) is stopped on the stop seat (208).

9. The optical fiber torsional force removal device according to claim 7, characterized in that: A pusher (13) is provided on one side of each clamping block (207) away from the traction belt (206), and the pusher (13) comprises a base (1305), a threaded sleeve (1301) is provided in the base (1305), a slidable push rod (1302) is provided in the sleeve (1301), a pressing plate (1303) abutting against the clamping block (207) is provided at one end of the push rod (1302), and a spring (1304) is provided between the sleeve (1301) and the sleeve (1301).

10. The optical fiber torsional force removal device according to claim 1, characterized in that: The rotating frame (4) comprises a transverse connecting plate (401) and a longitudinal connecting plate (402), the fiber placing disc (6) is arranged on the transverse connecting plate (401), the second clamp device (5) is arranged on the longitudinal connecting plate (402), one end of the rotating frame (4) is provided with a rotating shaft portion (404), the other end of the rotating frame (4) is provided with an annular end frame plate (403), a bearing seat (16) and a rotatable abutting wheel (14), the abutting wheel (14) abuts against the lower end surface of the annular end frame plate (403), the rotating shaft portion (404) is rotatably sleeved with the bearing seat (16), a U-shaped groove (406) is arranged in the center of the annular end frame plate (403), and a splicing plate (405) is arranged at the opening of the U-shaped groove (406).

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