Ultra-low temperature cooling device and method for insensitive optical fiber drawing tower

Abstract

The present invention discloses an ultra-low temperature cooling device and method for an insensitive optical fiber drawing tower, which relates to the technical field of cooling devices, including a pre-cooling cylinder and an ice maker, wherein a pre-cooling box is fixedly installed on the outer wall of the pre-cooling cylinder, an ice adding assembly is arranged on the top surface of the pre-cooling box, an ice delivery pipe is fixedly connected to one end of the top surface of the pre-cooling box, an ice-smoothing assembly is arranged inside the pre-cooling box, and an insulation sleeve is fixedly installed on the outer wall of the pre-cooling box, a cooling box is arranged below the pre-cooling cylinder, the optical fiber filament is movably arranged inside the cooling box, and a cooling assembly is arranged inside the cooling box. The ultra-low temperature cooling device and method for an insensitive optical fiber drawing tower disclosed by the present invention has the technical effect of pre-cooling the produced optical fiber filament, effectively reducing the temperature of the optical fiber filament before ultra-low temperature cooling, shortening the ultra-low temperature cooling time, reducing the consumption of liquid nitrogen, and then reducing the use cost.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling devices, and in particular to an ultra-low temperature cooling device and method for an insensitive optical fiber drawing tower. Background Art

[0002] In the production process of optical fiber, the optical fiber preform rod is usually subjected to a series of process flows such as heating, coating, and curing to obtain a formed optical fiber. The various steps of optical fiber production need to be closely coordinated. The emergence of optical fiber drawing towers meets this demand. After the optical fiber is produced by the drawing tower, it needs to be cooled using an ultra-low temperature cooling device.

[0003] After the existing optical fiber is produced in the drawing tower, it is directly transported to the ultra-low temperature cooling device for cooling. The temperature of the optical fiber just after production is relatively high. Directly cooling it with the ultra-low temperature cooling device will increase the cooling time, affect the cooling efficiency, and increase the consumption of liquid nitrogen, resulting in a higher cost of use. Summary of the invention

[0004] The present invention discloses an ultra-low temperature cooling device and method for an insensitive optical fiber drawing tower, aiming to solve the technical problem that the temperature of an optical fiber just after being produced is high, and directly using an ultra-low temperature cooling device for cooling will increase the cooling time, affect the cooling efficiency, increase the consumption of liquid nitrogen, and have a high cost of use.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An ultra-low temperature cooling device for an insensitive optical fiber drawing tower comprises a pre-cooling cylinder and an ice maker, wherein a plurality of optical fiber filaments are movably arranged inside the pre-cooling cylinder, and a pre-cooling box is fixedly installed on the outer wall of the pre-cooling cylinder, an ice-adding assembly is arranged on the top surface of the pre-cooling box, and the ice-adding assembly comprises an ice delivery pipe, and the ice delivery pipe is fixedly connected to one end of the top surface of the pre-cooling box, an ice-smoothing assembly is arranged inside the pre-cooling box, and an insulating sleeve is fixedly installed on the outer wall of the pre-cooling box, a cooling box is arranged below the pre-cooling cylinder, the optical fiber filaments are movably arranged inside the cooling box, and a cooling assembly is arranged inside the cooling box.

[0007] By arranging a pre-cooling cylinder, optical fiber filaments, a pre-cooling box, an ice adding assembly, an ice leveling assembly, an insulating sleeve, a cooling box and a cooling assembly, ice cubes are transported to the interior of the pre-cooling box through the ice adding assembly, and the optical fiber filaments are pre-cooled by the cold air generated by the ice cubes, thereby effectively reducing the temperature of the optical fiber filaments before ultra-low temperature cooling, shortening the ultra-low temperature cooling time, reducing the consumption of liquid nitrogen, and thus reducing the cost of use. The ice cubes are evenly laid in multiple layers inside the pre-cooling box through the ice leveling assembly, thereby improving the cooling effect of multiple optical fiber filaments, and the optical fiber filaments in the cooling box are ultra-low temperature cooled through the cooling assembly.

[0008] In a preferred scheme, the top surface of one end of the ice delivery pipe away from the pre-cooling box is open, and the open part of the ice delivery pipe is arranged below the ice outlet of the ice maker, and guide plates are fixedly connected to both sides of the top surface of the end of the ice delivery pipe away from the pre-cooling box, and a mounting bracket is fixedly connected to the bottom surface of the ice delivery pipe, and a driving motor is fixedly installed on the outer wall of the mounting bracket, and a power output shaft of the driving motor is connected to gear one through a coupling, and a synchronous belt is meshed on the surface of gear one, and a gear two is meshed at one end of the synchronous belt away from gear one; a toothless gear is fixedly connected to the outer wall of one side of the gear two, and a rack is meshed on the surface of the toothless gear, and a delivery push plate is fixedly connected to the outer wall of one side of the rack close to the ice delivery pipe, and the delivery push plate is slidably arranged on the inner wall of the ice delivery pipe, and a fixed plate is fixedly connected to the bottom surface of one end of the rack away from the delivery push plate, and the fixed plate is close to the outer wall of one side of the delivery push plate A spring is fixedly connected, and one end of the spring away from the fixed plate is fixedly connected to the outer wall of the mounting bracket, and the outer wall of the mounting bracket close to the fixed plate is fixedly connected to a guide rod, the spring is sleeved on the surface of the guide rod, and the guide rod is slidably arranged inside the fixed plate; the ice-smoothing assembly includes an electric telescopic rod, the electric telescopic rod is fixedly connected to one end of the top surface of the pre-cooling box away from the ice delivery pipe, the output end of the electric telescopic rod is fixedly connected to a lifting frame, the lifting frame is rotatably and slidably arranged on the outer wall of the pre-cooling cylinder, the bottom surface of the lifting frame is fixedly installed with an annular electric guide rail, and a sliding seat is slidably arranged on the surface of the annular electric guide rail; a combing frame is fixedly installed on the bottom surface of the sliding seat, a rotating seat is fixedly installed inside the combing frame, a rotating rod is rotatably arranged inside the rotating seat, the middle part of the rotating rod is rotatably arranged in the rotating seat, and rotating leaves are fixedly connected to the upper and lower ends of the outer wall of the rotating rod.

[0009] By providing an ice adding assembly and an ice leveling assembly, ice cubes produced by the ice maker fall on the ice delivery pipe, and the driving motor is started to make the delivery push plate push the ice cubes to move, and the ice cubes are pushed into the pre-cooling box, and the cold air generated by the ice cubes is used to lower the temperature in the pre-cooling box, thereby achieving pre-cooling treatment of the optical fiber filaments, and the combing frame and the rotating blades are in contact with the ice cubes, and the electric telescopic rod is adjusted to make the ice cubes evenly laid in the pre-cooling box, thereby improving the pre-cooling effect on the optical fiber filaments.

[0010] In a preferred embodiment, a plurality of drainage holes are provided on the bottom surface of the precooling box, and a return water assembly is arranged on the outer side of the precooling box, wherein the return water assembly comprises a return water tank, which is fixedly mounted on the bottom surface of the precooling box, a drainage pipe is fixedly mounted on the water outlet of the return water tank, one end of the drainage pipe away from the return water tank is fixedly connected with a shunt pipe 1, and one end of the shunt pipe 1 away from the drainage pipe is fixedly mounted with a shunt coil; a shunt pipe 2 is fixedly connected to the top surface of the shunt coil, the shunt pipe 2 is fixedly mounted inside the precooling box, and a confluence coil is fixedly connected to the top surface of the shunt pipe 2, a water outlet pipe is fixedly connected to the confluence coil, a water pump is fixedly mounted on the outer wall of the insulation sleeve, one end of the water outlet pipe away from the confluence coil is fixedly connected to the input end of the water pump, the output end of the water pump is fixedly connected with the return water pipe, and one end of the return water pipe away from the water pump is fixedly connected to the water filling port of the ice maker.

[0011] By providing a water return component, water generated after the ice cubes melt is discharged through the drainage hole and enters the water return tank. The water pump is started to make the water flow back into the ice maker, thereby realizing the recycling of water and improving the utilization efficiency of water resources.

[0012] In a preferred embodiment, the cooling assembly includes a liquid nitrogen inlet pipe, which is fixedly connected to the outer wall of the cooling box, one end of the liquid nitrogen inlet pipe is fixedly connected to the cooling pipe, the cooling pipe is S-shaped and arranged inside the cooling box, the outer wall of the cooling box is fixedly connected to the liquid nitrogen outlet pipe, the end of the cooling pipe away from the liquid nitrogen inlet pipe is fixedly connected to the liquid nitrogen outlet pipe, the end of the liquid nitrogen outlet pipe away from the cooling box is fixedly connected to the circulation pipe 1, the outer wall of the cooling box is fixedly installed with a circulation pump through a bracket, the circulation pipe 1 is fixedly installed at the input end of the circulation pump, the output end of the circulation pump is fixedly installed with a liquid nitrogen cooling chassis, the end of the liquid nitrogen cooling chassis away from the circulation pump is fixedly connected to the circulation pipe 2, and the end of the circulation pipe 2 away from the circulation pump is fixedly connected to the circulation pipe 2; a filter plate is fixedly installed inside the cooling box, the filter plate is arranged on the outside of the optical fiber, and a heat conductive pad is arranged on the outside of the filter plate, and the heat conductive pad is arranged on the inner side of the cooling pipe.

[0013] By providing a cooling component, the temperature in the cooling box is lowered by the liquid nitrogen in the cooling tube, and the cold air flow contacts the optical fiber to achieve ultra-low temperature cooling of the optical fiber. The circulation pump is started to allow the liquid nitrogen to flow back into the cooling tube after cooling, thereby realizing the circulation of the liquid nitrogen.

[0014] A method for ultra-low temperature cooling of an insensitive optical fiber drawing tower, using an ultra-low temperature cooling device for an insensitive optical fiber drawing tower as described above, comprises the following steps:

[0015] Step 1: The optical fiber moves along the pre-cooling cylinder and the interior of the cooling box, and the ice cubes produced by the ice maker fall into the ice delivery pipe. The driving motor is started, and the ice cubes are transported to the interior of the pre-cooling box through the ice delivery pipe by using the transport push plate;

[0016] Step 2: During the process of conveying ice cubes, the slide seat slides along the surface of the annular electric guide rail, and the combing frame and the rotating blades evenly spread the ice cubes. The electric telescopic rod is adjusted to make the ice cubes evenly spread in multiple layers, thereby achieving pre-cooling of the optical fiber.

[0017] Step 3: Ultra-low temperature cooling is performed on the interior of the cooling box through the cooling pipe. The cold air flow is guided to one side of the optical fiber through the thermally conductive gasket. The circulation of liquid nitrogen is realized by starting the circulation pump to achieve ultra-low temperature cooling of the optical fiber.

[0018] From the above, it can be seen that the ultra-low temperature cooling device of the insensitive optical fiber drawing tower provided by the present invention has the technical effect of pre-cooling the produced optical fiber filaments, effectively reducing the temperature of the optical fiber filaments before ultra-low temperature cooling, shortening the ultra-low temperature cooling time, reducing the consumption of liquid nitrogen, and then reducing the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of an ultra-low temperature cooling device for an insensitive optical fiber drawing tower proposed by the present invention.

[0020] Figure 2 A side view of the overall structure of an ultra-low temperature cooling device for an insensitive optical fiber drawing tower proposed by the present invention.

[0021] Figure 3 This is a side structural cross-sectional view of the insulation sleeve of an ultra-low temperature cooling device for an insensitive optical fiber drawing tower proposed by the present invention.

[0022] Figure 4 The present invention proposes an ultra-low temperature cooling device for an insensitive optical fiber drawing tower Figure 3 A magnified view of the structure in the middle.

[0023] Figure 5 A structural side view of an ice-scaling assembly of an ultra-low temperature cooling device for an insensitive optical fiber drawing tower proposed by the present invention.

[0024] Figure 6 A structural side view of a water return component of an ultra-low temperature cooling device for an insensitive optical fiber drawing tower proposed by the present invention.

[0025] Figure 7 A side structural cross-sectional view of a cooling component of an ultra-low temperature cooling device for an insensitive optical fiber drawing tower proposed by the present invention.

[0026] In the figure: 1, pre-cooling cylinder; 2, optical fiber; 3, pre-cooling box; 4, ice adding assembly; 401, ice delivery pipe; 402, guide plate; 403, mounting bracket; 404, driving motor; 405, gear 1; 406, synchronous belt; 407, gear 2; 408, missing tooth gear; 409, rack; 410, conveying push plate; 411, fixed plate; 412, spring; 413, guide rod; 5, ice mixing assembly; 501, electric telescopic rod; 502, lifting frame; 503, circular electric guide rail; 504, slide seat; 505, combing frame; 506, rotating seat; 5 07, rotating rod; 508, rotating blade; 6, return water assembly; 601, return water tank; 602, drain pipe; 603, diversion pipe one; 604, diversion coil; 605, diversion pipe two; 606, converging coil; 607, outlet pipe; 608, water pump; 609, return water pipe; 7, insulation sleeve; 8, cooling box; 9, cooling assembly; 901, liquid nitrogen inlet pipe; 902, cooling pipe; 903, liquid nitrogen outlet pipe; 904, circulation pipe one; 905, circulation pump; 906, circulation pipe two; 907, filter plate; 908, thermal pad; 909, liquid nitrogen cooling chassis. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] The ultra-low temperature cooling device for an insensitive optical fiber drawing tower disclosed in the present invention is mainly used in scenarios where the temperature of an optical fiber just after production is high. Directly using the ultra-low temperature cooling device for cooling will increase the cooling time, affect the cooling efficiency, and increase the consumption of liquid nitrogen, resulting in a high cost of use.

[0029] Reference Figure 1-Figure 7 A super-low temperature cooling device for an insensitive optical fiber drawing tower comprises a pre-cooling cylinder 1 and an ice maker, wherein a plurality of optical fiber filaments 2 are movably arranged inside the pre-cooling cylinder 1, and a pre-cooling box 3 is fixedly installed on the outer wall of the pre-cooling cylinder 1, and an ice adding component 4 is arranged on the top surface of the pre-cooling box 3, and the ice adding component 4 comprises an ice delivery pipe 401, and the ice delivery pipe 401 is fixedly connected to one end of the top surface of the pre-cooling box 3, an ice-smoothing component 5 is arranged inside the pre-cooling box 3, and an insulation sleeve 7 is fixedly installed on the outer wall of the pre-cooling box 3, a cooling box 8 is arranged below the pre-cooling cylinder 1, the optical fiber filaments 2 are movably arranged inside the cooling box 8, and a cooling component 9 is arranged inside the cooling box 8.

[0030] Specifically, the optical fiber filaments 2 move along the interior of the pre-cooling cylinder 1 and the cooling box 8, the ice maker produces ice cubes, and the ice cubes are transported to the interior of the pre-cooling box 3 through the ice adding component 4. The cold air generated by the ice cubes is used to pre-cool the optical fiber filaments 2, which effectively reduces the temperature of the optical fiber filaments 2 before ultra-low temperature cooling, shortens the ultra-low temperature cooling time, reduces the consumption of liquid nitrogen, and thus reduces the cost of use. When adding ice cubes, the ice cubes are evenly laid in multiple layers inside the pre-cooling box 3 through the ice leveling component 5, thereby improving the cooling effect of multiple optical fiber filaments 2. After the pre-cooling treatment, the optical fiber filaments 2 move along the interior of the cooling box 8, and the cooling component 9 is used to ultra-low temperature cool the optical fiber filaments 2 in the cooling box 8.

[0031] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5In a preferred embodiment, the top surface of one end of the ice delivery pipe 401 away from the precooling box 3 is open, and the open part of the ice delivery pipe 401 is arranged below the ice outlet of the ice maker, and both sides of the top surface of the end of the ice delivery pipe 401 away from the precooling box 3 are fixedly connected with guide plates 402, and the bottom surface of the ice delivery pipe 401 is fixedly connected with a mounting bracket 403, and the outer wall of the mounting bracket 403 is fixedly installed with a driving motor 404, and the power output shaft of the driving motor 404 is connected to a gear 1 405 through a coupling, and the surface of the gear 1 405 is meshed with the same The synchronous belt 406 is meshed with a gear 2 407 at one end away from the gear 1 405; a toothless gear 408 is fixedly connected to the outer wall of one side of the gear 2 407, and a rack 409 is meshed on the surface of the toothless gear 408. The rack 409 is fixedly connected to a delivery push plate 410 on the outer wall of the side close to the ice delivery pipe 401. The delivery push plate 410 is slidably arranged on the inner wall of the ice delivery pipe 401, and a fixed plate 411 is fixedly connected to the bottom surface of one end of the rack 409 away from the delivery push plate 410. The fixed plate 411 is fixed to the outer wall of one side of the delivery push plate 410. A spring 412 is connected, and one end of the spring 412 away from the fixed plate 411 is fixedly connected to the outer wall of the mounting bracket 403. The outer wall of the mounting bracket 403 close to the fixed plate 411 is fixedly connected to a guide rod 413. The spring 412 is sleeved on the surface of the guide rod 413, and the guide rod 413 is slidably arranged inside the fixed plate 411; the ice-scraping assembly 5 includes an electric telescopic rod 501, which is fixedly connected to one end of the top surface of the pre-cooling box 3 away from the ice delivery pipe 401, and the output end of the electric telescopic rod 501 is fixedly connected to the lifting frame 50 2. The lifting frame 502 is rotatably and slidably arranged on the outer wall of the pre-cooling cylinder 1, and an annular electric guide rail 503 is fixedly installed on the bottom surface of the lifting frame 502, and a slide seat 504 is slidably arranged on the surface of the annular electric guide rail 503; a combing frame 505 is fixedly installed on the bottom surface of the slide seat 504, and a rotating seat 506 is fixedly installed inside the combing frame 505, and a rotating rod 507 is rotatably arranged inside the rotating seat 506, and the middle part of the rotating rod 507 is rotatably arranged in the rotating seat 506, and rotating leaves 508 are fixedly connected to the upper and lower ends of the outer wall of the rotating rod 507.

[0032] Specifically, when adding ice cubes, the ice cubes produced by the ice maker fall on the ice delivery pipe 401, the driving motor 404 is started to rotate the gear 1 405, the synchronous belt 406 is meshed with the gear 1 405 and the gear 2 407 at the same time, so that the gear 2 407 drives the toothless gear 408 to rotate, the toothless gear 408 is meshed with the rack 409, and the rack 409 moves to drive the conveying push plate 410 to push the ice cubes to move, and push the ice cubes into the pre-cooling box 3. When the teeth on the toothless gear 408 are separated from the rack 409, the spring 412 is reset. The conveying push plate 410 is stretched to return to its initial position, and the ice cubes are added cyclically. The cold air generated by the ice cubes is used to lower the temperature in the pre-cooling box 3, and then the optical fiber filament 2 is pre-cooled. When adding ice cubes, the slide 504 slides along the surface of the annular electric guide rail 503, so that the combing frame 505 and the rotating blade 508 slide inside the pre-cooling box 3 and contact the ice cubes. After rotating one circle, the electric telescopic rod 501 is retracted upward to adjust. This cycle allows the ice cubes to be evenly laid in the pre-cooling box 3, thereby improving the pre-cooling effect on the optical fiber filament 2.

[0033] Reference Figure 1 , Figure 2 , Figure 3 and Figure 6 In a preferred embodiment, a plurality of drainage holes are provided on the bottom surface of the precooling box 3, and a return water assembly 6 is provided on the outer side of the precooling box 3. The return water assembly 6 comprises a return water tank 601, the return water tank 601 is fixedly mounted on the bottom surface of the precooling box 3, a drainage pipe 602 is fixedly mounted on the water outlet of the return water tank 601, a shunt pipe 603 is fixedly connected to one end of the drainage pipe 602 away from the return water tank 601, and a shunt coil 604 is fixedly mounted to one end of the shunt pipe 603 away from the drainage pipe 602; the top surface of the shunt coil 604 is fixedly connected to There is a second shunt pipe 605, which is fixedly installed inside the pre-cooling box 3, and the top surface of the second shunt pipe 605 is fixedly connected to a confluence coil 606, and a water outlet pipe 607 is fixedly connected to the water outlet of the confluence coil 606. A water pump 608 is fixedly installed on the outer wall of the insulation sleeve 7, and one end of the water outlet pipe 607 away from the confluence coil 606 is fixedly connected to the input end of the water pump 608, and the output end of the water pump 608 is fixedly connected to a return pipe 609, and one end of the return pipe 609 away from the water pump 608 is fixedly connected to the water filling port of the ice maker.

[0034] Specifically, after the ice cubes in the optical fiber 2 melt, the generated water is discharged through the drainage hole and enters the return water tank 601, and the water pump 608 is started. The water in the return water tank 601 enters the interior of the outlet pipe 607 through the drainage pipe 602, the diversion pipe 1 603, the diversion coil 604, the diversion pipe 2 605 and the converging coil 606 in turn, and under the action of the water pump 608, the water flows back to the ice maker through the return water pipe 609, thereby realizing the recycling of water and improving the utilization efficiency of water resources.

[0035] Reference Figure 1 , Figure 2 and Figure 7 In a preferred embodiment, the cooling assembly 9 includes a liquid nitrogen inlet pipe 901, which is fixedly connected to the outer wall of the cooling box 8, one end of the liquid nitrogen inlet pipe 901 is fixedly connected to a cooling pipe 902, and the cooling pipe 902 is arranged in an S shape inside the cooling box 8. The outer wall of the cooling box 8 is fixedly connected to a liquid nitrogen outlet pipe 903, and one end of the cooling pipe 902 away from the liquid nitrogen inlet pipe 901 is fixedly connected to the liquid nitrogen outlet pipe 903, and one end of the liquid nitrogen outlet pipe 903 away from the cooling box 8 is fixedly connected to a circulation pipe 904, and the outer wall of the cooling box 8 is fixedly installed with a circulation pump 90 through a bracket. 5. The circulation pipe 1 904 is fixedly installed at the input end of the circulation pump 905, and the output end of the circulation pump 905 is fixedly installed with a liquid nitrogen cooling box 909. The end of the liquid nitrogen cooling box 909 away from the circulation pump 905 is fixedly connected to the circulation pipe 2 906, and the end of the circulation pipe 2 906 away from the circulation pump 905 is fixedly connected to the circulation pipe 2 906; the inside of the cooling box 8 is fixedly installed with a filter plate 907, the filter plate 907 is arranged on the outside of the optical fiber 2, and the outside of the filter plate 907 is provided with a thermal pad 908, and the thermal pad 908 is arranged on the inner side of the cooling pipe 902.

[0036] Specifically, after the optical fiber filament 2 is pre-cooled, the temperature in the cooling box 8 is lowered by the liquid nitrogen in the cooling tube 902, so that the interior of the cooling box 8 is maintained in an ultra-low temperature state, and the generated cold air flow is guided by the thermal gasket 908 and then contacts the optical fiber filament 2 through the cooling tube 902, thereby realizing ultra-low temperature cooling of the optical fiber filament 2, and the circulation pump 905 is started to discharge the liquid nitrogen in the cooling tube 902 through the liquid nitrogen outlet pipe 903 and the circulation pipe 1 904, and after being cooled by the liquid nitrogen cooling chassis 909, it flows back to the interior of the cooling tube 902 through the circulation pipe 2 906 and the liquid nitrogen inlet pipe 901, thereby realizing the circulation of liquid nitrogen.

[0037] A method for ultra-low temperature cooling of an insensitive optical fiber drawing tower, using an ultra-low temperature cooling device for an insensitive optical fiber drawing tower as described above, comprises the following steps:

[0038] Step 1: The optical fiber 2 moves along the pre-cooling cylinder 1 and the cooling box 8, and the ice cubes produced by the ice maker fall into the ice delivery pipe 401. The driving motor 404 is started, and the ice cubes are transported from the ice delivery pipe 401 to the inside of the pre-cooling box 3 by using the transport push plate 410;

[0039] Step 2: During the process of conveying ice cubes, the slide 504 slides along the surface of the annular electric guide rail 503, and the combing frame 505 and the rotating blades 508 evenly spread the ice cubes. The electric telescopic rod 501 is adjusted to make the ice cubes evenly spread in multiple layers, thereby achieving pre-cooling of the optical fiber 2.

[0040] Step three: ultra-low temperature cooling is performed on the interior of the cooling box 8 through the cooling pipe 902. The cold air flow is guided to the side of the optical fiber 2 through the thermal pad 908. The circulation of liquid nitrogen is realized by starting the circulation pump 905 to achieve ultra-low temperature cooling of the optical fiber 2.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ultra-low temperature cooling device for an insensitive optical fiber drawing tower, comprising a pre-cooling cylinder (1) and an ice maker, It is characterized in that A plurality of optical fibers (2) are movably arranged inside the pre-cooling cylinder (1), and a pre-cooling box (3) is fixedly mounted on the outer wall of the pre-cooling cylinder (1); an ice adding assembly (4) is arranged on the top surface of the pre-cooling box (3); the ice adding assembly (4) comprises an ice delivery pipe (401); the ice delivery pipe (401) is fixedly connected to one end of the top surface of the pre-cooling box (3); an ice mixing assembly (5) is arranged inside the pre-cooling box (3); and a heat preservation sleeve (7) is fixedly mounted on the outer wall of the pre-cooling box (3); a cooling box (8) is arranged below the pre-cooling cylinder (1); the optical fibers (2) are movably arranged inside the cooling box (8); and a cooling assembly (9) is arranged inside the cooling box (8); The top surface of one end of the ice delivery pipe (401) away from the pre-cooling box (3) is open, and the open part of the ice delivery pipe (401) is arranged below the ice outlet of the ice maker, and both sides of the top surface of the end of the ice delivery pipe (401) away from the pre-cooling box (3) are fixedly connected to guide plates (402), the bottom surface of the ice delivery pipe (401) is fixedly connected to a mounting bracket (403), and the outer wall of the mounting bracket (403) is fixedly mounted with a driving motor (404), the power output shaft of the driving motor (404) is connected to a gear 1 (405) through a coupling, the surface of the gear 1 (405) is meshed with a synchronous belt (406), and the end of the synchronous belt (406) away from the gear 1 (405) is meshed with a gear 2 (407); A toothless gear (408) is fixedly connected to an outer wall of one side of the gear 2 (407); a rack (409) is meshed on the surface of the toothless gear (408); a delivery push plate (410) is fixedly connected to an outer wall of a side of the rack (409) close to the ice delivery pipe (401); the delivery push plate (410) is slidably arranged on the inner wall of the ice delivery pipe (401); a fixed plate (411) is fixedly connected to the bottom surface of one end of the rack (409) away from the delivery push plate (410); and the fixed plate A spring (412) is fixedly connected to an outer wall of one side of the (411) close to the conveying push plate (410), one end of the spring (412) away from the fixed plate (411) is fixedly connected to the outer wall of the mounting bracket (403), and a guide rod (413) is fixedly connected to an outer wall of one side of the mounting bracket (403) close to the fixed plate (411), the spring (412) is sleeved on the surface of the guide rod (413), and the guide rod (413) is slidably arranged inside the fixed plate (411); The ice-scraping assembly (5) comprises an electric telescopic rod (501), the electric telescopic rod (501) being fixedly connected to an end of the top surface of the pre-cooling box (3) away from the ice delivery pipe (401), the output end of the electric telescopic rod (501) being fixedly connected to a lifting frame (502), the lifting frame (502) being rotatably and slidably arranged on the outer wall of the pre-cooling cylinder (1), an annular electric guide rail (503) being fixedly installed on the bottom surface of the lifting frame (502), and a sliding seat (504) being slidably arranged on the surface of the annular electric guide rail (503); A combing frame (505) is fixedly mounted on the bottom surface of the slide seat (504), a rotating seat (506) is fixedly mounted inside the combing frame (505), a rotating rod (507) is rotatably arranged inside the rotating seat (506), a middle portion of the rotating rod (507) is rotatably arranged inside the rotating seat (506), and rotating blades (508) are fixedly connected to upper and lower ends of the outer wall of the rotating rod (507).

2. The ultra-low temperature cooling device for an insensitive optical fiber drawing tower according to claim 1, It is characterized in that The bottom surface of the pre-cooling box (3) is provided with a plurality of drainage holes, and a return water assembly (6) is arranged on the outside of the pre-cooling box (3), wherein the return water assembly (6) comprises a return water tank (601), the return water tank (601) is fixedly mounted on the bottom surface of the pre-cooling box (3), a drainage pipe (602) is fixedly mounted at the water outlet of the return water tank (601), one end of the drainage pipe (602) away from the return water tank (601) is fixedly connected to a diverter pipe 1 (603), and one end of the diverter pipe 1 (603) away from the drainage pipe (602) is fixedly mounted to a diverter coil (604).

3. The ultra-low temperature cooling device for an insensitive optical fiber drawing tower according to claim 2, It is characterized in that The top surface of the diverter coil (604) is fixedly connected to a second diverter pipe (605), which is fixedly installed inside the pre-cooling box (3), and the top surface of the second diverter pipe (605) is fixedly connected to a converging coil (606), a water outlet pipe (607) is fixedly connected to the water outlet of the converging coil (606), a water pump (608) is fixedly installed on the outer wall of the thermal insulation sleeve (7), one end of the water outlet pipe (607) away from the converging coil (606) is fixedly connected to the input end of the water pump (608), the output end of the water pump (608) is fixedly connected to a return pipe (609), and one end of the return pipe (609) away from the water pump (608) is fixedly connected to the water injection port of the ice maker.

4. The ultra-low temperature cooling device for an insensitive optical fiber drawing tower according to claim 3, It is characterized in that The cooling assembly (9) comprises a liquid nitrogen inlet pipe (901), the liquid nitrogen inlet pipe (901) being fixedly connected to the outer wall of the cooling box (8), one end of the liquid nitrogen inlet pipe (901) being fixedly connected to a cooling pipe (902), the cooling pipe (902) being arranged in an S-shape inside the cooling box (8), the outer wall of the cooling box (8) being fixedly connected to a liquid nitrogen outlet pipe (903), one end of the cooling pipe (902) being away from the liquid nitrogen inlet pipe (901) being fixedly connected to the liquid nitrogen outlet pipe (903), and one end of the liquid nitrogen outlet pipe (903) being away from the cooling box (8) The end of the cooling box (8) is fixedly connected with a circulation pipe 1 (904); a circulation pump (905) is fixedly installed on the outer wall of the cooling box (8) through a bracket; the circulation pipe 1 (904) is fixedly installed at the input end of the circulation pump (905); a liquid nitrogen cooling box (909) is fixedly installed at the output end of the circulation pump (905); an end of the liquid nitrogen cooling box (909) away from the circulation pump (905) is fixedly connected with a circulation pipe 2 (906); and an end of the circulation pipe 2 (906) away from the circulation pump (905) is fixedly connected to the circulation pipe 2 (906).

5. The ultra-low temperature cooling device for an insensitive optical fiber drawing tower according to claim 4, It is characterized in that A filter plate (907) is fixedly installed inside the cooling box (8), the filter plate (907) is arranged on the outside of the optical fiber (2), and a heat conductive gasket (908) is arranged on the outside of the filter plate (907), and the heat conductive gasket (908) is arranged on the inside of the cooling pipe (902).

6. A method for ultra-low temperature cooling of an insensitive optical fiber drawing tower, using the ultra-low temperature cooling device of an insensitive optical fiber drawing tower as claimed in claim 5, It is characterized in that The steps include: Step 1: The optical fiber (2) moves along the interior of the pre-cooling cylinder (1) and the cooling box (8), and the ice cubes produced by the ice maker fall into the ice delivery pipe (401). The driving motor (404) is started, and the ice cubes are transported from the ice delivery pipe (401) to the interior of the pre-cooling box (3) by using the transport push plate (410); Step 2: During the process of conveying ice cubes, the slide seat (504) slides along the surface of the annular electric guide rail (503), the combing frame (505) and the rotating blades (508) evenly spread the ice cubes, and the electric telescopic rod (501) is adjusted to make the ice cubes evenly spread in multiple layers, thereby achieving pre-cooling treatment of the optical fiber (2); Step 3: Ultra-low temperature cooling is performed on the interior of the cooling box (8) through the cooling pipe (902), and the cold air flow is guided to the side of the optical fiber (2) through the heat conductive gasket (908). The circulation of liquid nitrogen is realized by starting the circulation pump (905), thereby realizing ultra-low temperature cooling of the optical fiber (2).

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