Optical fiber drawing waste recovery system

Abstract

The invention discloses an optical fiber drawing waste recovery system. The system comprises a broken fiber signal receiver; a control center; coating the mold with resin; the optical fiber take-up module is used for taking up the optical fiber coated with the resin; and the resin recovery module is used for receiving resin falling during fiber breaking. The broken fiber signal receivers are arranged at the resin coating mold and the optical fiber take-up module, the two broken fiber signal receivers are used for cooperatively judging whether the fiber is broken or not, and when the broken optical fiber is suddenly stopped in a standby state, the resin recovery module is started through signal transmission, so that the reasonability and accuracy of the starting time of the resin recovery module are ensured; mistaken starting or non-starting events or the phenomenon that resin is not received in time is avoided, the resin is directly received when fibers are broken, pipelines are not polluted, new resin is not polluted, and the working difficulty is reduced; when the material receiving box works, the mechanical arm is opened to 90 degrees, when the material receiving box is standby, the mechanical arm is closed to 0 degree, operation space is not occupied, normal production is not affected during normal wire drawing, and convenience and rapidness are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of optical fiber preparation, and in particular relates to an optical fiber drawing waste recycling system. Background Art

[0002] The optical fiber preform is heated in a drawing furnace and drawn into an optical fiber under the action of gravity. During the optical fiber drawing process, the speed can reach more than 2500m / min. In high-speed production, the optical fiber may break in the machine due to defects or scratches of the optical fiber preform itself, causing the optical fiber production to be on standby. At the same time, during the drawing process of the bare optical fiber, it is necessary to undergo two resin coatings to enhance the mechanical strength and bendability of the optical fiber and extend the life of the optical fiber. However, when the optical fiber is on standby for production, a large amount of resin accumulates in the resin coating mold. If not handled in time, these resins will drip under the action of gravity, contaminating the drawing channel, and may also drip into the drawing UV lamp, affecting the quality of the drawn optical fiber when it is produced again. However, the existing optical fiber drawing equipment does not have the function of automatically collecting the coated resin, and can only spend a lot of manpower and material resources to clean it, which is time-consuming, labor-intensive and costly.

[0003] The Chinese invention patent, publication number CN105084784A, discloses an automatic coating collection device and a collection method after the fiber is broken during the drawing of an optical fiber preform. The automatic coating collection device is used in conjunction with the optical fiber preform drawing equipment, including a tray, a pushing mechanism that pushes the tray to be located directly below the coating outlet of the coating die, a contact sensor, and a controller electrically connected to the contact sensor and used to control the operation of the pushing mechanism. The wheel rod can touch the contact sensor when it resets and swings, which solves the problem of waste material falling and contaminating the UV curing lamp after the fiber is broken during drawing, reduces the time for re-drawing and passing through the mold, and improves work efficiency. However, the contact sensor of the patent is external, and the sensor has high precision and is easily interfered by external signals. When the external airflow or environmental conditions change, the sensor starts working, which will cause the high-speed drawing to be stopped, causing a production accident. In addition, the patent starts working by relying on the dancing wheel to touch the sensor signal to start working. If the sensor position is too close, it will cause the sensor to be touched during normal operation. If the sensor position is too far, it will cause the dancing wheel to rely on inertia to fail to contact the sensor when the fiber is broken, and the resin receiving device will not be able to start working normally in time.

[0004] A Chinese invention patent, publication number CN103739211A, discloses a method and equipment for automatically recovering residual coatings in optical fiber drawing. The equipment includes a primary coating storage tank, a secondary coating storage tank, a pneumatic actuator 1, a pneumatic actuator 2, a coating cup, a vacuum generating device, and a waste storage barrel. The pneumatic actuator 1 and the pneumatic actuator 2 are installed on a drawing tower frame close to the coating system. The vacuum generating device and the waste storage barrel are installed on a control cabinet and placed next to the coating system. The three interfaces on the ball valve of the pneumatic actuator 1 are respectively connected to the coating cup, the primary coating storage tank, and the waste storage barrel through high-pressure coating pipes. The three interfaces on the ball valve of the pneumatic actuator 2 are respectively connected to the coating cup, the secondary coating storage tank, and the waste storage barrel through high-pressure coating pipes. The pneumatic actuator 1, the pneumatic actuator 2, and the vacuum generating device all use compressed air as a power source and are controlled by an electromagnetic valve. The residual coating in the coating cup is automatically recovered after the fiber is broken. However, the resin recovery pipeline and the resin supply pipeline of the patent are connected by a tee, and the tee is controlled by a pneumatic connector. This structure is prone to resin leakage in the pipeline, which contaminates the new coating resin. The waste storage barrel sucks the residual waste in the coating cup into it by vacuuming. Although the efficiency is high, after long-term use, some waste will be sucked into the vacuum generating device, resulting in a decrease in recovery efficiency. Summary of the invention

[0005] In order to solve the technical problems existing in the prior art, the purpose of the present invention is to provide an optical fiber drawing waste recycling system.

[0006] In order to achieve the above purpose and the above technical effect, the technical solution adopted by the present invention is:

[0007] An optical fiber drawing waste recycling system, comprising:

[0008] Fiber break signal receiver;

[0009] A control center is connected to a fiber break signal receiver to monitor whether a fiber is broken;

[0010] A resin coating mold, used for coating the optical fiber with resin;

[0011] An optical fiber take-up module is used to take up the optical fiber coated with resin;

[0012] The resin recovery module is connected to the control center and is used to receive the resin dropped when the fiber is broken.

[0013] Furthermore, the fiber break signal receivers are respectively arranged at the resin coating mold and the optical fiber take-up module.

[0014] Furthermore, the resin coating mold includes a primary coating mold and a secondary coating mold. The optical fiber first passes through the primary coating mold for primary resin coating, and then enters the secondary coating mold for secondary resin coating. The diameter of the optical fiber after the secondary resin coating is 0.2-0.25mm.

[0015] Furthermore, the primary coating mold includes a mold sleeve I, a mold core I and a space I of the mold sleeve and mold core. The optical fiber and resin enter the primary coating mold from the mold sleeve I, and the diameter of the optical fiber after the primary resin coating is controlled by the mold core I. The optical fiber after the primary resin coating passes through the space I of the mold sleeve and mold core and then enters the secondary coating mold.

[0016] Furthermore, the secondary coating mold includes a mold sleeve II, a mold core II, a space II of the mold sleeve and mold core, and a pressurizing ring. The optical fiber and resin after the primary resin coating enter the secondary coating mold from the mold sleeve II. The diameter of the optical fiber after the secondary resin coating is controlled by the mold core II and the pressurizing ring. The optical fiber after the secondary resin coating passes through the space II of the mold sleeve and mold core and is then pulled to the optical fiber take-up module.

[0017] Furthermore, there are four pressurizing rings, which are evenly distributed below the mold core II along the circumferential direction. The four pressurizing rings move radially to shrink or compress the mold core II, and the space II of the mold sleeve and mold core assembly expands or shrinks accordingly.

[0018] Furthermore, the optical fiber take-up module includes a tension wheel, a traction wheel and a take-up wheel. The optical fiber after secondary resin coating passes through the tension wheel, the traction wheel and the take-up wheel in sequence to complete the large-plate take-up action.

[0019] Furthermore, the optical fiber take-up module also includes a spring, a spring force controller and a slide groove. The tension wheel and the spring force controller are respectively connected to the spring. The spring expansion and contraction are controlled by the spring force controller. The expansion and contraction of the spring can push the tension wheel to move left and right on the slide groove, thereby adjusting the fiber entry angle of the optical fiber on the traction wheel and the size of the optical fiber traction force.

[0020] Furthermore, the resin recovery module includes a receiving box, a weighing sensor arranged on the receiving box, and a mechanical arm connected to the receiving box and driving the receiving box to move, and receives the resin dropped when the fiber is broken through the receiving box. The weighing sensor is connected to the control center.

[0021] Furthermore, one end of the robotic arm is connected to the material receiving box, and the other end is fixed on the drawing tower plate. The robotic arm is connected to a servo motor, and the servo motor is connected to a control center.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1) The present invention provides a fiber break signal receiver at both the resin coating mold and the optical fiber take-up module. The fiber break signal receiver is connected to the control center. The two fiber break signal receivers are used to collaboratively determine whether the fiber is broken, thereby ensuring the rationality and accuracy of the start-up timing of the resin recovery module, avoiding the occurrence of false start-up or non-start-up events or untimely resin reception due to environmental factors or accuracy differences when a single fiber break signal receiver detects a fiber break signal, and at the same time solving the problem of the sensor for collecting the fiber break signal being exposed;

[0024] 2) When the fiber is in standby state due to fiber breakage emergency stop, the resin recovery module is activated through signal transmission, and the coating resin is recovered after the material box is extended, which reduces manual operation, avoids the pollution of the optical fiber channel caused by failure to shut down and clean up waste in time, and reduces the investment of manpower and material resources in cleaning the optical fiber channel;

[0025] 3) When the fiber is broken, the resin is directly received without being connected to any pipeline, without polluting the pipeline, without being connected to the resin storage tank, and without polluting the new resin. After the preset load-bearing capacity of the material receiving box is reached, the material receiving box can be cleaned, which reduces the difficulty of the work;

[0026] 4) The mechanical arm is used to drive the material receiving. When the material receiving box is working, the mechanical arm opens to 90°. When the material receiving box is on standby, the mechanical arm closes to 0°, which does not occupy the operating space and avoids affecting the normal coating activities. During normal wire drawing, it does not affect normal production, which is convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the one-time coating mold of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the secondary coating mold of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the pressurized ring of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the optical fiber take-up module of the present invention;

[0031] Figure 5-6 They are respectively structural schematic diagrams of the material receiving box of the present invention;

[0032] Figure 7-8 They are respectively structural schematic diagrams of the mechanical arm of the present invention. DETAILED DESCRIPTION

[0033] The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0034] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0035] like Figure 1-8 As shown, the present invention discloses an optical fiber drawing waste recycling system, comprising:

[0036] Fiber break signal receiver;

[0037] A control center is connected to a fiber break signal receiver to monitor whether a fiber is broken;

[0038] A resin coating mold, used for coating the optical fiber with resin;

[0039] An optical fiber take-up module is used to take up the optical fiber coated with resin;

[0040] The resin recovery module is connected to the control center and is used to receive the resin dropped when the fiber is broken.

[0041] Due to surface defects such as microcracks on the surface of the preform rod, fiber breakage may occur during the wire drawing process. The fiber breakage position often occurs at the resin coating mold and the optical fiber take-up module. Therefore, the present invention respectively sets fiber breakage signal receivers at the resin coating mold and the optical fiber take-up module. The fiber breakage signal receivers are connected to the control center. When the control center receives the fiber breakage signals transmitted by the two fiber breakage signal receivers, the resin recovery module is controlled to start and take over the resin dropped when the fiber is broken.

[0042] The resin coating mold is filled with resin of a certain pressure and temperature. During the normal coating process, due to the heat on the surface of the optical fiber, the viscosity of the coating on the top of the mold will be lower than that at other places. This viscosity difference will cause a pressure difference, thereby pushing the resin upward. Through a certain coating pressure, the stability of the coating liquid surface in the mold is guaranteed. When the optical fiber breaks at the resin coating mold, the stability of the coating liquid surface is destroyed, and the resin will leak from the mold mouth. At this time, the outer diameter of the optical fiber monitored by the infrared diameter gauge under the mold changes significantly, and the signal is transmitted to the control center.

[0043] The resin coating mold adopts a dry coating mold, which is divided into two coatings. The resin coating mold includes a primary coating mold and a secondary coating mold. The optical fiber first passes through the primary coating mold for a resin coating, and then enters the secondary coating mold for a secondary resin coating.

[0044] The primary coating mold includes a mold sleeve Ⅰ1, a mold core Ⅰ2 and a space Ⅰ3 where the mold sleeve and the mold core are assembled. The mold sleeve Ⅰ1 has a larger aperture and serves as a guide for the optical fiber. At the same time, the resin also enters from the mold sleeve Ⅰ1. The mold core Ⅰ2 is only used to control the diameter of the optical fiber after the primary resin coating. The optical fiber after the primary resin coating passes through the space Ⅰ3 where the mold sleeve and the mold core are assembled and then enters the secondary coating mold.

[0045] The secondary coating mold includes a mold sleeve Ⅱ4, a mold core Ⅱ5, a space Ⅱ6 where the mold sleeve and the mold core are assembled, and a plurality of pressurized rings 7. The optical fiber and the resin after the primary resin coating enter the secondary coating mold from the mold sleeve Ⅱ4. The diameter of the optical fiber after the secondary resin coating is controlled by the mold core Ⅱ5 and the pressurized ring 7. The optical fiber after the secondary resin coating passes through the space Ⅱ6 where the mold sleeve and the mold core are assembled and then is pulled to the optical fiber take-up module.

[0046] As for reducing the optical fiber diameter, the path to achieve small-size optical fiber is to reduce the optical fiber coating diameter. For this purpose, the mold core Ⅱ5 is designed to be pneumatically controlled to control the size of the mold core. The air pressure drives the pressurizing ring 8 to move radially, shrinking or compressing the mold core Ⅱ5 surrounded by the four pressurizing rings 8. The space Ⅱ6 of the mold sleeve and the mold core assembly expands or shrinks accordingly, and the diameter range after the second coating of resin can be controlled to be 0.2-0.25mm.

[0047] The optical fiber take-up module includes a tension wheel 9, a spring 10, a spring force controller 11, a slide 12, a traction wheel 13, and a take-up wheel 14. The optical fiber after secondary resin coating passes through the tension wheel 9, the traction wheel 13, and the take-up wheel 14 in sequence to complete the large-disk take-up action.

[0048] The tension wheel 9 and the spring force controller 11 are respectively connected to the spring 10 , and the spring 10 is controlled to be extended and retracted by the spring force controller 1 . The extension and retraction of the spring 10 can push the tension wheel 9 to move left and right on the slide slot 12 .

[0049] When the tension wheel 9 moves from left to right on the slide 12, the fiber entry angle of the optical fiber on the traction wheel 13 also changes accordingly, and the wrap angle formed by the traction wheel 13 also changes accordingly. The wrap angle changes in the range of 45°-135°. As the wrap angle increases, the traction force of the traction wheel increases. The position of the tension wheel 9 can be controlled by the telescopic movement of the spring 10, thereby controlling the fiber entry angle of the optical fiber on the traction wheel 13 and adjusting the fiber traction force.

[0050] During the stable drawing process, the moving optical fiber generates a positive pressure pointing to the center of the tension wheel, and the component of the positive pressure in the horizontal direction and the elastic force of the spring 10 together are 0. However, when the fiber is broken due to impurities, fiber defects, scratches, etc., the positive pressure disappears instantly, the balance between the positive pressure and the elastic force of the spring 10 is destroyed, the spring 10 restores its shape, and the elastic force decreases. The spring force controller 11 changes, and the changed data is fed back to the control center. The infrared diameter gauge and the spring force controller 11 form a fiber break signal receiver.

[0051] The resin recovery module includes a receiving box 15, a weighing sensor 16 arranged on the receiving box 15, and a mechanical arm 17 connected to the receiving box 15 and driving the receiving box 15 to move. The resin dropped when the fiber is broken is received through the receiving box 15. The weighing sensor 16 is connected to the control center.

[0052] One end of the robot arm 17 is connected to the material receiving box 15, and the other end is fixed on the drawing tower plate. The robot arm 17 is connected to the servo motor 18, and the servo motor 18 is connected to the control center. According to the command of the control center, the servo motor 18 drives the robot arm 17 to move, and the movement angle of the robot arm 17 is 0°-90°. When the control center receives two fiber break signals at the same time, the robot arm 17 slowly opens from 0° to 90°, drives the material receiving box 15 to move to the bottom of the mold, and starts to receive the material to ensure that the UV lamp below will not be contaminated by the waste resin. When the material receiving box 15 is on standby, the robot arm 17 is closed to 0°, does not occupy the operating space, and avoids affecting the normal coating activities.

[0053] A plurality of screw holes 19 are provided above the material receiving box 15 for fixing the robot arm 17 and the material receiving box 15 .

[0054] When the height of the resin in the material receiving box 15 exceeds a preset height, the weighing sensor 16 sends a signal to remind the operator to clean up the waste in the box.

[0055] The mechanical arm 17 is fixed to the receiving box 15 by bolts through the hole Ⅰ17-1. The mechanical arm 17 is fixed to the tower plate of the drawing tower by bolts through the hole Ⅱ17-2.

[0056] In order to keep the receiving box 15 stable during the waste recycling process, a double-arm structure is adopted in which two mechanical arms 17 work simultaneously, and the two mechanical arms 17 are fixed by a connecting plate 20 .

[0057] The present invention ensures the stability and rationality of receiving the broken fiber signal through the receiving design of the double broken fiber signal at the traction take-up point and the resin coating point. When the fiber is broken during the wire drawing process, the spring force controller 11 measures the elastic force as 0, and at the same time, the infrared diameter gauge below the resin coating mold shows that the outer diameter of the optical fiber is 0, and the control center controls the resin recovery module to start. When the resin recovery module is started, the mechanical arm 17 extends from the folded state, driving the material receiving box 15 to the bottom of the resin coating mold and starts to recover the resin. When the resin recovered in the material receiving box 15 reaches the preset weight, the weighing sensor 16 sends a signal to remind the staff to handle the recovered resin in the material receiving box 15.

[0058] Example 1

[0059] like Figure 1-8 As shown, an optical fiber drawing waste recycling system comprises:

[0060] Fiber break signal receiver;

[0061] A control center is connected to a fiber break signal receiver to monitor whether a fiber is broken;

[0062] A resin coating mold, used for coating the optical fiber with resin;

[0063] An optical fiber take-up module is used to take up the optical fiber coated with resin;

[0064] The resin recovery module is connected to the control center and is used to receive the resin dropped when the fiber is broken.

[0065] Due to surface defects such as microcracks on the surface of the preform rod, fiber breakage may occur during the drawing process. The fiber breakage position often occurs at the resin coating mold and the optical fiber take-up module. Therefore, fiber breakage signal receivers are respectively arranged at the resin coating mold and the optical fiber take-up module. The fiber breakage signal receivers are connected to the control center. When the control center receives the fiber breakage signals transmitted by the two fiber breakage signal receivers, the resin recovery module is controlled to start and take over the resin dropped when the fiber is broken.

[0066] The resin coating mold is filled with resin of a certain pressure and temperature. During the normal coating process, due to the heat on the surface of the optical fiber, the viscosity of the coating on the top of the mold will be lower than that at other places. This viscosity difference will cause a pressure difference, thereby pushing the resin upward. Through a certain coating pressure, the stability of the coating liquid surface in the mold is guaranteed. When the optical fiber breaks at the resin coating mold, the stability of the coating liquid surface is destroyed, and the resin will leak from the mold mouth. At this time, the outer diameter of the optical fiber monitored by the infrared diameter gauge under the mold changes significantly, and the signal is transmitted to the control center.

[0067] The resin coating mold adopts a dry coating mold, which is divided into two coatings. The resin coating mold includes a primary coating mold and a secondary coating mold. The optical fiber first passes through the primary coating mold for a resin coating, and then enters the secondary coating mold for a secondary resin coating.

[0068] The primary coating mold adopts a conventional pressure mold, and the primary coating mold includes a mold sleeve Ⅰ1, a mold core Ⅰ2 and a space Ⅰ3 where the mold sleeve and the mold core are assembled. The mold sleeve Ⅰ1 has a larger aperture and serves as a guide for the optical fiber. At the same time, the resin also enters from the mold sleeve Ⅰ1. The mold core Ⅰ2 is only used to control the diameter of the optical fiber after the primary resin coating. The diameter of a conventional optical fiber after the primary resin coating is 0.18mm. The optical fiber after the primary resin coating passes through the space Ⅰ3 where the mold sleeve and the mold core are assembled and then enters the secondary coating mold.

[0069] The secondary coating mold includes a mold sleeve Ⅱ4, a mold core Ⅱ5, a space Ⅱ6 where the mold sleeve and the mold core are assembled, and a pressurizing ring 7. There are four pressurizing rings 8, which are evenly distributed below the mold core Ⅱ5 along the circumferential direction. The optical fiber and the resin after the primary resin coating enter the secondary coating mold from the mold sleeve Ⅱ4. The diameter of the optical fiber after the secondary resin coating is controlled by the mold core Ⅱ5 and the pressurizing ring 7. The optical fiber after the secondary resin coating passes through the space Ⅱ6 where the mold sleeve and the mold core are assembled and then is pulled to the optical fiber take-up module.

[0070] As for reducing the optical fiber diameter, the path to achieve small-size optical fiber is to reduce the optical fiber coating diameter. For this purpose, the mold core Ⅱ5 is designed to be pneumatically controlled. The air pressure drives the four pressurized rings 8 to move radially, shrinking or compressing the mold core Ⅱ5 surrounded by the four pressurized rings 8, and the space Ⅱ6 of the mold sleeve and the mold core assembly expands or shrinks accordingly, controlling the diameter range after the second coating of resin to 0.2mm.

[0071] The optical fiber take-up module includes a tension wheel 9, a spring 10, a spring force controller 11, a slide 12, a traction wheel 13, and a take-up wheel 14. The optical fiber after secondary resin coating passes through the tension wheel 9, the traction wheel 13, and the take-up wheel 14 in sequence to complete the large-disk take-up action.

[0072] The tension wheel 9 and the spring force controller 11 are respectively connected to the spring 10 , and the spring 10 is controlled to be extended and retracted by the spring force controller 1 . The extension and retraction of the spring 10 can push the tension wheel 9 to move left and right on the slide slot 12 .

[0073] When the tension wheel 9 moves from left to right on the slide 12, the fiber entry angle of the optical fiber on the traction wheel 13 also changes accordingly, and the wrap angle formed by the traction wheel 13 also changes accordingly. The wrap angle changes in the range of 45°-135°. As the wrap angle increases, the traction force of the traction wheel increases. The position of the tension wheel 9 can be controlled by the telescopic movement of the spring 10, thereby controlling the fiber entry angle of the optical fiber on the traction wheel 13 and adjusting the fiber traction force.

[0074] During the stable drawing process, the moving optical fiber generates a positive pressure pointing to the center of the tension wheel, and the component of the positive pressure in the horizontal direction and the elastic force of the spring 10 together are 0. However, when the fiber is broken due to impurities, fiber defects, scratches, etc., the positive pressure disappears instantly, the balance between the positive pressure and the elastic force of the spring 10 is destroyed, the spring 10 restores its shape, and the elastic force decreases. The spring force controller 11 changes, and the changed data is fed back to the control center. The infrared diameter gauge and the spring force controller 11 form a fiber break signal receiver.

[0075] The resin recovery module includes a receiving box 15, a weighing sensor 16 arranged on the receiving box 15, and a mechanical arm 17 connected to the receiving box 15 and driving the receiving box 15 to move. The resin dropped when the fiber is broken is received through the receiving box 15. The weighing sensor 16 is connected to the control center.

[0076] One end of the robot arm 17 is connected to the material receiving box 15, and the other end is fixed on the drawing tower plate. The robot arm 17 is connected to the servo motor 18, and the servo motor 18 is connected to the control center. According to the command of the control center, the servo motor 18 drives the robot arm 17 to move, and the movement angle of the robot arm 17 is 0°-90°. When the control center receives two fiber break signals at the same time, the robot arm 17 slowly opens from 0° to 90°, drives the material receiving box 15 to move to the bottom of the mold, and starts to receive the material to ensure that the UV lamp below will not be contaminated by the waste resin. When the material receiving box 15 is on standby, the robot arm 17 is closed to 0°, does not occupy the operating space, and avoids affecting the normal coating activities.

[0077] The material receiving box 15 is made of 316 stainless steel, has a thickness of 1 mm, and is in the shape of a truncated cone structure, with an upper circle diameter of 12 cm, a lower circle diameter of 2 cm, and a height of 9 cm.

[0078] There are two 6mm screw holes 19 above the material receiving box 15, and the distance between the two screw holes is 8cm, which are used to fix the mechanical arm 17 and the material receiving box 15.

[0079] The weighing sensor 16 is a high-precision micro weighing sensor. When the resin height in the material receiving box 15 exceeds 2 / 3 of the height of the material receiving box, the resin weight = 240πcm 3 *1.18g / cm 3 =283.2g, the weighing sensor 16 sends a signal to remind the operator to clean up the waste in the box.

[0080] The mechanical arm 17 is made of 316 stainless steel, and the diameters of the holes Ⅰ17-1 and Ⅱ17-2 are 6 mm. The mechanical arm 17 is connected to the receiving box 15 through the hole Ⅰ17-1 using an angle code and fixed with M6 bolts. The mechanical arm 17 is fixed to the drawing tower plate through the hole Ⅱ17-2 using an angle code and M6 bolts.

[0081] In order to keep the receiving box 15 stable during the waste recycling process, a double-arm structure is adopted in which two mechanical arms 17 work simultaneously, and the two mechanical arms 17 are fixed by a connecting plate 20 .

[0082] This embodiment ensures the stability and rationality of receiving the broken fiber signal by designing the receiving of double broken fiber signals at the traction take-up point and the resin coating point. When a broken fiber occurs during the wire drawing process, the spring force controller 11 measures the elastic force as 0, and at the same time, the infrared diameter gauge below the resin coating die shows that the outer diameter of the optical fiber is 0, and the control center controls the resin recovery module to start. When the resin recovery module is started, the mechanical arm 17 extends from the folded state, driving the material receiving box 15 to the bottom of the resin coating die and starts to recover the resin. When the resin recovered in the material receiving box 15 reaches the preset weight, the weighing sensor 16 sends a signal to remind the staff to handle the recovered resin in the material receiving box 15.

[0083] Parts or structures not specifically described in the present invention may adopt existing technologies or existing products and will not be described in detail here.

[0084] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An optical fiber drawing waste recycling system, characterized in that: include: Fiber break signal receiver; A control center is connected to a fiber break signal receiver to monitor whether a fiber is broken; A resin coating mold, used for coating the optical fiber with resin; An optical fiber take-up module is used to take up the optical fiber coated with resin; The resin recovery module is connected to the control center and is used to receive the resin dropped when the fiber is broken.

2. The optical fiber drawing waste recycling system according to claim 1, characterized in that: The fiber break signal receivers are respectively arranged at the resin coating mold and the optical fiber take-up module.

3. The optical fiber drawing waste recycling system according to claim 1, characterized in that: The resin coating mold includes a primary coating mold and a secondary coating mold. The optical fiber first passes through the primary coating mold for primary resin coating, and then enters the secondary coating mold for secondary resin coating. The diameter of the optical fiber after the secondary resin coating is 0.2-0.25mm.

4. The optical fiber drawing waste recycling system according to claim 3, characterized in that: The primary coating mold comprises a mold sleeve I, a mold core I and a space I where the mold sleeve and the mold core are assembled. The optical fiber and the resin enter the primary coating mold from the mold sleeve I, and the diameter of the optical fiber after the primary resin coating is controlled by the mold core I. The optical fiber after the primary resin coating passes through the space I where the mold sleeve and the mold core are assembled and then enters the secondary coating mold.

5. The optical fiber drawing waste recycling system according to claim 3, characterized in that: The secondary coating mold includes a mold sleeve II, a mold core II, a space II where the mold sleeve and the mold core are assembled, and a pressurizing ring. The optical fiber and the resin after the primary resin coating enter the secondary coating mold from the mold sleeve II. The diameter of the optical fiber after the secondary resin coating is controlled by the mold core II and the pressurizing ring. The optical fiber after the secondary resin coating passes through the space II where the mold sleeve and the mold core are assembled and then is pulled to the optical fiber take-up module.

6. The optical fiber drawing waste recycling system according to claim 5, characterized in that: There are four pressurizing rings, which are evenly distributed below the mold core II along the circumferential direction. The four pressurizing rings move radially to shrink or compress the mold core II, and the space II of the mold sleeve and the mold core assembly expands or shrinks accordingly.

7. The optical fiber drawing waste recycling system according to claim 1, characterized in that: The optical fiber take-up module comprises a tension wheel, a traction wheel and a take-up wheel. The optical fiber after secondary resin coating passes through the tension wheel, the traction wheel and the take-up wheel in sequence to complete the large-plate take-up action.

8. The optical fiber drawing waste recycling system according to claim 7, characterized in that: The optical fiber take-up module also includes a spring, a spring force controller and a slide slot. The tension wheel and the spring force controller are respectively connected to the spring. The spring expansion and contraction are controlled by the spring force controller. The expansion and contraction of the spring can push the tension wheel to move left and right on the slide slot, thereby adjusting the fiber entry angle of the optical fiber on the traction wheel and the size of the optical fiber traction force.

9. The optical fiber drawing waste recycling system according to claim 1, characterized in that: The resin recovery module includes a material receiving box, a weighing sensor arranged on the material receiving box, and a mechanical arm connected to the material receiving box and driving the material receiving box to move, and receives the resin dropped when the fiber is broken through the material receiving box. The weighing sensor is connected to the control center.

10. The optical fiber drawing waste recycling system according to claim 9, characterized in that: One end of the mechanical arm is connected to the material receiving box, and the other end is fixed on the drawing tower plate. The mechanical arm is connected to the servo motor, and the servo motor is connected to the control center.

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