Optical fiber drawing cooling equipment

Abstract

The invention relates to the field of optical fiber drawing production and manufacturing, in particular to optical fiber drawing cooling equipment. The optical fiber drawing cooling equipment provided by the invention comprises an equipment main body, a water circulation device, an air supply device and a heat dissipation assembly, the equipment main body comprises a shell and an inner container, the inner container is embedded in the shell, and optical fibers pass through the inner container; the water circulation device is communicated with the shell, and the water circulation device is configured to cool the gas in the inner container and the shell; the air supply device is communicated with the inner container, and the air supply device is configured to introduce air into the inner container; the heat dissipation assembly is arranged in the inner container, and the heat dissipation assembly is configured to cool air in the inner container. According to the optical fiber drawing cooling equipment, heat of gas in the inner container is absorbed through the heat dissipation assembly, the gas usage amount can be reduced, and the cooling efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of optical fiber drawing production and manufacturing, and in particular to an optical fiber drawing cooling device. Background Art

[0002] When producing optical fiber, it is necessary to first prepare the preform rod through processes such as chemical vapor deposition, and then soften it through high-temperature heating, accurately draw it into shape, and coat it with a protective layer to solidify it. During the high-temperature heating and drawing process of the optical fiber, the furnace temperature can be as high as 2000℃. Before coating, the optical fiber needs to be cooled to prevent breakage or bubbles.

[0003] In the prior art, the optical fiber passes through a cooling tube before coating, and the optical fiber is cooled by the circulating water circuit of the cooling tube and the helium gas introduced therein.

[0004] However, as the optical fiber drawing speed becomes faster and faster, a large amount of helium is needed to ensure the cooling effect, which increases the material cost. Summary of the invention

[0005] The present application provides an optical fiber drawing cooling device to solve the current technical problem that the optical fiber drawing speed becomes faster and a large amount of helium needs to be used.

[0006] The present application provides an optical fiber drawing cooling device, comprising an equipment body, a water circulation device, an air supply device and a heat dissipation component; the equipment body comprises an outer shell and an inner shell, the inner shell is embedded in the outer shell, and the inner shell is configured to pass the optical fiber; the water circulation device is connected to the outer shell, and the water circulation device is configured to cool the gas in the inner shell and the outer shell; the air supply device is connected to the inner shell, and the air supply device is configured to introduce gas into the inner shell; the heat dissipation component is arranged in the inner shell, and the heat dissipation component is configured to cool the gas in the inner shell.

[0007] The optical fiber drawing cooling device provided in the present application can quickly absorb the heat of the inner tank gas through the heat dissipation component and transfer it to the water circulation device, thereby improving the cooling effect and reducing the use of helium.

[0008] As an optional embodiment, the heat dissipation assembly includes a heat sink, a traction rope and a pneumatic switch. The heat sink is rotatably connected to the inner wall of the inner tank, one end of the traction rope is connected to the heat sink, and the other end of the traction rope is connected to the pneumatic switch. The pneumatic switch is configured to control the movement of the traction rope to pull the heat sink to rotate around the inner wall of the inner tank.

[0009] With this arrangement, the inclination angle of the heat sink can be adjusted through the pneumatic switch and the traction rope, thereby increasing the contact area between the heat sink and the gas in the inner tank to improve the cooling effect.

[0010] As an optional embodiment, heat sinks are arranged in pairs on both sides of the inner wall along the diameter direction of the inner tank, and multiple pairs of heat sinks are arranged at intervals along the length direction of the inner tank; a semicircular groove is provided on the side of the heat sink away from the inner wall of the inner tank, and the semicircular grooves of two pairs of heat sinks can be connected to form a circular groove to allow the optical fiber to pass through.

[0011] With this arrangement, the heat sink can limit the position of the optical fiber, preventing the optical fiber from adhering to the inner wall of the inner tank and making it difficult to clean.

[0012] As an optional implementation, two traction ropes are provided, each traction rope is connected to a plurality of heat sinks on a single side of the inner wall of the inner tank, so as to pull the plurality of heat sinks to rotate simultaneously.

[0013] With such an arrangement, the rotation of multiple heat sinks can be controlled simultaneously, thereby improving the rotation efficiency of the heat sinks.

[0014] As an optional embodiment, the optical fiber drawing cooling device also includes a shutter device, which is openably disposed at the openings at the upper and lower ends of the inner container, and is configured to prevent the gas in the inner container from quickly overflowing.

[0015] Such an arrangement can slow down the overflow rate of the inner tank gas during the cooling process, improve the gas utilization rate and reduce the production cost.

[0016] As an optional embodiment, the water circulation device includes a high-pressure water pipe and a chiller, and the shell is provided with a water inlet and a water return port, and the water inlet and the water return port are connected to the chiller through the high-pressure water pipe to form a circulating water circuit.

[0017] With such an arrangement, the circulating water in the outer shell can be cooled by the chiller, and the circulating water absorbs the heat transferred from the gas in the inner tank to the outer shell, thereby improving the cooling efficiency.

[0018] As an optional embodiment, the chiller includes a circulating water pump, which is configured to drive the circulating water to circulate and adjust the circulating water circulation speed.

[0019] With such an arrangement, the circulation speed of the circulating water can be adjusted according to the optical fiber drawing speed, thereby improving the cooling efficiency.

[0020] As an optional embodiment, the gas supply device includes a gas circuit interface and a gas pipeline. The gas circuit interface is arranged on the outer shell and connected to the inner tank. The gas circuit interface is connected to multiple gas sources through the gas pipeline to introduce different gases into the inner tank.

[0021] With this arrangement, different gases can be introduced into the inner tank as needed to improve the cooling efficiency.

[0022] As an optional embodiment, the gas path interfaces are arranged in pairs on both sides along the diameter direction of the shell; the shell has multiple shell sections, each shell section is provided with multiple pairs of gas path interfaces, and the multiple pairs of gas path interfaces are arranged at intervals along the length direction of the shell.

[0023] With this arrangement, gas can be introduced into the optical fiber at different angles at the same time, thereby improving the uniformity of cooling.

[0024] As an optional embodiment, the optical fiber drawing cooling device further includes a temperature sensor, which is disposed in the inner container and configured to detect the real-time temperature of the inner container.

[0025] With this arrangement, the temperature of the inner tank can be detected in real time through the temperature sensor to adjust the circulating water circulation speed and gas usage to ensure the cooling effect.

[0026] The present application provides an optical fiber drawing cooling device, including an equipment body, a water circulation device, an air supply device and a heat dissipation component; the equipment body includes an outer shell and an inner liner, the inner liner is embedded in the outer shell, and the inner liner is configured to pass through the optical fiber; the water circulation device is connected to the outer shell, and the water circulation device is configured to cool the gas in the inner liner and the outer shell; the air supply device is connected to the inner liner, and the air supply device is configured to pass gas into the inner liner; the heat dissipation component is arranged in the inner liner, and the heat dissipation component is configured to cool the gas in the inner liner. The optical fiber drawing cooling device provided by the present application absorbs the heat of the inner liner gas through the heat dissipation component, which can reduce the gas usage and improve the cooling efficiency.

[0027] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the optical fiber drawing cooling equipment provided by the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of the structure of an optical fiber drawing cooling device provided in an embodiment of the present application;

[0030] Figure 2 A schematic diagram of the heat sink provided in an embodiment of the present application when in operation;

[0031] Figure 3 A schematic diagram of a shutter device provided in an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 100-Optical fiber drawing cooling equipment;

[0034] 110-equipment body; 111-outer shell; 112-inner tank; 120-water circulation device; 121-high-pressure water pipe; 122-water chiller; 123-water inlet; 124-water return port; 130-gas supply device; 131-gas circuit interface; 132-gas pipeline; 140-heat dissipation component; 141-heat sink; 142-traction rope; 143-pneumatic switch; 144-semicircular groove; 150-shutter device; 151-mounting frame; 152-blade; 160-temperature sensor. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] The terms "first", "second", "third", "fourth", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances. For example, without departing from the scope of this document, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0037] The word "if" as used herein may be interpreted as "when" or "when" or "in response to determining," depending on the context.

[0038] Furthermore, as used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context indicates otherwise.

[0039] It should be further understood that the terms “comprises” and “includes” indicate the existence of features, steps, operations, elements, components, items, types, and / or groups, but do not exclude the existence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups.

[0040] The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Thus, "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". An exception to this definition will only occur when a combination of elements, functions, steps or operations are inherently mutually exclusive in some manner.

[0041] When producing optical fiber, it is necessary to first prepare the preform rod through processes such as chemical vapor deposition, and then soften it through high-temperature heating, accurately draw it into shape, and coat it with a protective layer to solidify it. During the high-temperature heating and drawing process of the optical fiber, the furnace temperature can be as high as 2000℃. Before coating, the optical fiber needs to be cooled to prevent breakage or bubbles.

[0042] In the prior art, after the preform is melted into an optical fiber, it passes through a cooling tube before coating, and is passed through the inner liner of the cooling tube using a wire drawing tool, and then passes through a curing furnace and a coating mold in sequence, and is finally connected to a take-up machine, ready to be accelerated to normal production speed, with the drawing speed increased from less than 100 m / min to 2500-3000 m / min. At this time, the heat of the optical fiber itself will be dissipated to the inner liner of the cooling tube, rapidly raising its internal temperature. By continuously introducing helium into the inner liner of the cooling tube to remove the heat of the optical fiber, and by cooling the outer shell and the inner liner gas through circulating water in the outer shell of the cooling tube, the optical fiber can be quickly cooled.

[0043] However, as the fiber drawing speed becomes faster and faster, it is difficult to ensure that the fiber is cooled to the specified temperature before coating using existing cooling technology, which will lead to quality problems such as bubbles in the speed-up process of fiber production. A large amount of helium needs to be increased to ensure the cooling effect, which increases material costs.

[0044] In order to solve the technical problem that optical fiber is difficult to cool after speed increase, and the use of helium needs to be increased, the present application provides an optical fiber drawing cooling device. By adding a heat dissipation component to the inner tank, the heat dissipation component can quickly absorb the heat of helium and transfer it to the circulating water, thereby improving the cooling efficiency and reducing the use of helium and production costs.

[0045] Figure 1 A schematic diagram of the structure of an optical fiber drawing cooling device provided in an embodiment of the present application; Figure 2 A schematic diagram of the heat sink provided in an embodiment of the present application when in operation; Figure 3 A schematic diagram of a shutter device provided in an embodiment of the present application.

[0046] See also Figures 1 to 3As shown, an embodiment of the present application provides an optical fiber drawing cooling device 100, including an equipment body 110, a water circulation device 120, an air supply device 130 and a heat dissipation component 140; the equipment body 110 includes an outer shell 111 and an inner shell 112, the inner shell 112 is embedded in the outer shell 111, and the inner shell 112 is configured to pass through the optical fiber; the water circulation device 120 is connected to the outer shell 111, and the water circulation device 120 is configured to cool the gas in the inner shell 112 and the outer shell 111; the air supply device 130 is connected to the inner shell 112, and the air supply device 130 is configured to pass gas into the inner shell 112; the heat dissipation component 140 is arranged in the inner shell 112, and the heat dissipation component 140 is configured to cool the gas in the inner shell 112.

[0047] It can be understood that the device body 110 is composed of an outer shell 111 and an inner liner 112. The outer shell 111 can be made of a lightweight, highly thermally conductive and corrosion-resistant material, such as aluminum alloy; the inner liner 112 can be made of a highly thermally conductive, high-temperature resistant material, such as copper, etc. The inner diameter of the inner liner 112 can be 30 mm, and the inner liner 112 is embedded in the outer shell 111. The inner liner 112 can be a cylindrical hole with openings at both ends. When the optical fiber is drawn through the inner liner 112, a gas with good thermal conductivity and not easy to undergo chemical changes at high temperature can be introduced into the inner liner 112 through the gas supply device 130 to cool the optical fiber, such as argon, helium, etc. In the embodiment of the present application, helium is used to cool the optical fiber. The optical fiber transfers heat to the surrounding helium through heat conduction. The helium around the optical fiber causes the helium in the inner liner 112 to quickly heat up through thermal convection. The helium transfers heat to the heat dissipation component 140 and the side wall of the inner liner 112 through heat conduction. At the same time, a small amount of helium overflow will also take away the heat. The side wall of the inner liner 112 contacts the outer shell 111, and part of the heat is transferred to the outer shell 111. At this time, the water circulation device 120 starts to operate, and the side wall of the inner liner 112 and the outer shell 111 are cooled by circulating water. After the side wall of the inner liner 112 is cooled, the heat of the heat dissipation component 140 is transferred to the side wall of the inner liner 112. In this way, the cooling process of the optical fiber is completed.

[0048] See also Figure 1 , Figure 2 As shown, as an optional embodiment, the heat dissipation assembly 140 includes a heat sink 141, a traction rope 142 and a pneumatic switch 143. The heat sink 141 is rotatably connected to the inner wall of the inner tank 112, one end of the traction rope 142 is connected to the heat sink 141, and the other end of the traction rope 142 is connected to the pneumatic switch 143. The pneumatic switch 143 is configured to control the movement of the traction rope 142 to pull the heat sink 141 to rotate around the inner wall of the inner tank 112.

[0049] It is understandable that when the temperature inside the device rises to a certain level, the temperature sensor 160 will transmit a signal to the main control computer, and the main control computer will control the pneumatic switch 143 to start, and the piston or valve inside the pneumatic switch 143 will move accordingly, changing the air pressure state. Under the action of the air pressure, the pneumatic switch 143 will pull or release the traction rope 142. When the traction rope 142 is pulled, the heat sink 141 will rotate around the inner wall of the inner tank 112, changing its contact angle and area with the helium, thereby increasing the heat dissipation effect; when the traction rope 142 is released, the heat sink 141 will return to the initial position under the action of its own gravity or other reset devices.

[0050] It should be noted that during the optical fiber drawing process, the start switch lifts the heat sink 141 and forms a non-zero angle with the optical fiber. Preferably, the heat sink 141 can be lifted to form a 45° angle with the optical fiber to increase the contact area between the heat sink 141 and the helium and improve the cooling effect.

[0051] Among them, one end of the heat sink 141 can be rotatably connected to the inner wall of the liner 112 through a hinge, and one end of the heat sink 141 is connected to the traction rope 142. The heat sink 141 can be made of a material with high temperature resistance and good thermal conductivity, such as high heat dissipation graphene, ultra-high temperature ceramics, etc., and the traction rope 142 can be made of a high temperature resistant and wear-resistant fiber material, such as graphene reinforced fiber, new ceramic-based composite fiber, etc.

[0052] As an optional embodiment, the heat sinks 141 are arranged in pairs on both sides of the inner wall along the diameter direction of the inner liner 112, and multiple pairs of heat sinks 141 are arranged at intervals along the length direction of the inner liner 112; a semicircular groove 144 is provided on the side of the heat sink 141 away from the inner wall of the inner liner 112, and the semicircular grooves 144 of two pairs of heat sinks 141 can be connected to form a circular groove to allow the optical fiber to pass through.

[0053] It can be understood that the heat sinks 141 are arranged in pairs to evenly cool the optical fiber and prevent it from affecting the refractive index of the optical fiber; multiple pairs of heat sinks 141 are arranged at intervals along the length of the inner liner 112 to increase the thermal conduction efficiency of the helium, allowing the optical fiber to cool from 2000°C to room temperature within a few seconds to meet the temperature requirements of the coating.

[0054] It should be noted that a semicircular groove 144 is provided at one end of the heat sink 141 away from the inner wall of the inner liner 112. The semicircular grooves 144 of the paired heat sinks 141 have equal diameters and can form a circular groove when docked, so that the optical fiber can pass through. When the optical fiber drawing production is completed or the fiber is broken online, the semicircular groove 144 can prevent the optical fiber from adhering to the inner wall of the inner liner 112 over a large area. The broken optical fiber is blocked by the heat sink 141 and can be manually pulled out, reducing the difficulty of cleaning.

[0055] As an optional implementation, two traction ropes 142 are provided, and each traction rope 142 is connected to a plurality of heat sinks 141 on a single side of the inner wall of the inner tank 112 to pull the plurality of heat sinks 141 to rotate simultaneously.

[0056] It should be noted that both traction ropes 142 are connected to the pneumatic switch 143, and each traction rope 142 simultaneously pulls the heat sinks 141 at different heights on one side, so that the heat sinks 141 on the same side are always in a parallel state and will not collide with each other. The pneumatic switch 143 can control the two traction ropes 142 separately or simultaneously.

[0057] See also Figure 3 As shown, as an optional embodiment, the optical fiber drawing cooling device 100 also includes a shutter device 150, which is openably disposed at the openings at the upper and lower ends of the inner liner 112, and the shutter device 150 is configured to prevent the gas in the inner liner 112 from quickly overflowing.

[0058] It is understood that the shutter device 150 can be composed of a mounting frame 151 and shutter blades 152, and there are at least two shutter blades. The mounting frame 151 is used to fix the shutter blades 152 and the driving mechanism, and is installed at the upper and lower openings of the inner liner 112. The blades 152 are evenly distributed around the circumference of the opening of the inner liner 112. The material of the blades 152 needs to have good high temperature resistance and certain mechanical strength, such as stainless steel, ceramic materials or aluminum alloys, etc., to ensure stable operation under high temperature environment. The driving mechanism is used to control the opening and closing action of the shutter blades 152. When the optical fiber is ready to pass through the inner liner 112, the main control computer controls the driving mechanism to drive the blades 152 of the two shutter devices 150 to open. After the optical fiber is passed through the inner liner 112 by the wire drawing tool, the driving mechanism is controlled to drive the blades 152 of the two shutter devices 150 to close. After the blades 152 are closed, small holes are left for the optical fiber to continue to pass through. After the shutter device 150 is closed, it can prevent the gas in the inner liner 112 from quickly overflowing, which can improve the utilization rate of the gas and reduce the consumption of gas materials.

[0059] As an optional embodiment, the water circulation device 120 includes a high-pressure water pipe 121 and a chiller 122. The shell 111 is provided with a water inlet 123 and a water return port 124. The water inlet 123 and the water return port 124 are connected through the high-pressure water pipe 121 and the chiller 122 to form a circulating water circuit.

[0060] It should be noted that the water inlet 123 can be set on the lower side of the outer shell 111, and the water return port 124 can be set on the upper side of the outer shell 111 to improve the cooling efficiency. Two groups of water inlet 123 and water return port 124 can be set, and the two groups of water inlet 123 and water return port 124 can be symmetrically arranged on both sides of the diameter direction of the outer shell 111, so that the temperature distribution at different positions of the inner tank 112 is more uniform; a cooling water path is also provided inside the outer shell 111 to pass circulating water, and the cooling water path can be spirally arranged inside the outer shell 111.

[0061] It is understandable that when the water circulation device 120 starts to operate, the chiller 122 is first started to cool the water stored inside to the set temperature. The high-pressure water pipe 121 serves as a water transmission channel. Driven by the chiller 122, the circulating water is transported from the outlet of the chiller 122 to the water inlet 123 of the shell 111 through the high-pressure water pipe 121. After entering the shell 111, the circulating water flows in the cooling water path, absorbing the heat of the side wall of the liner 112 and the shell 111 to achieve a cooling effect. As the heat is absorbed, the water temperature gradually rises, and the heated circulating water flows out through the return water port 124 of the shell 111, enters the high-pressure water pipe 121 again, and is transported back to the chiller 122. After receiving the return water, the chiller 122 uses its internal refrigeration system to cool the water again to restore it to its initial low temperature state. The cooled circulating water is again transported to the water inlet 123 of the shell 111 through the high-pressure water pipe 121 to start a new round of circulation, and so on, forming a continuous circulating water circuit to continuously cool the side wall of the inner tank 112 and the shell 111. The chiller 122 can be connected to a PLC (programmable logic controller) to adjust the water circulation speed according to the temperature of the inner tank 112.

[0062] As an optional embodiment, the chiller 122 includes a circulating water pump, which is configured to drive the circulating water to circulate and adjust the circulating water circulation speed.

[0063] It is understandable that the circulating water pump, as a power source, provides power for water circulation, and the main control computer can send instructions to the circulating water pump according to the temperature of the inner tank 112 to adjust the speed of the circulating water pump, thereby adjusting the circulation speed of the circulating water. When the optical fiber drawing speed is too fast and the temperature of the inner tank 112 is too high, the circulation speed can be increased, and more heat can be absorbed per unit time, so that the optical fiber can be reduced to a specified temperature before leaving the cooling device; when the optical fiber drawing speed is slow, the temperature of the inner tank 112 is low, and the circulation speed can be reduced to save electricity.

[0064] As an optional embodiment, the gas supply device 130 includes a gas circuit interface 131 and a gas pipeline 132. The gas circuit interface 131 is arranged on the outer shell 111 and communicated with the inner liner 112. The gas circuit interface 131 is connected to multiple gas sources through the gas pipeline 132 to introduce different gases into the inner liner 112.

[0065] It is understandable that the gas circuit interface 131 penetrates the outer shell 111 and is connected to the inner liner 112, and gas is introduced into the inner liner 112 through the gas pipeline 132. The gas pipeline 132 is connected to different sources, and an MFC (mass flow controller) switch is provided in the middle of the gas pipeline 132. When the optical fiber drawing is cooled, the MFC switch can be controlled by the main control computer to control the gas pipeline 132 to be connected to the helium gas source, and helium gas can be introduced into the inner liner 112; when the optical fiber drawing is cooled, the MFC switch can be controlled by the main control computer to control the gas pipeline 132 to be connected to the compressed air (CDA) gas source, and the inner wall of the inner liner 112 can be purged with compressed air to separate broken optical fibers, dust, etc. from the inner wall of the inner liner 112, thereby reducing adhesion and facilitating easy removal of the remaining optical fibers.

[0066] As an optional embodiment, the gas circuit interfaces 131 are arranged in pairs on both sides along the diameter direction of the shell 111; the shell 111 has multiple shell sections, each shell section is provided with multiple pairs of gas circuit interfaces 131, and the multiple pairs of gas circuit interfaces 131 are arranged at intervals along the length direction of the shell.

[0067] It can be understood that arranging the air path interfaces 131 in pairs in the diameter direction of the outer shell 111 can improve the uniformity of cooling, and arranging multiple groups of air path interfaces 131 at intervals along the length direction of the shell can make the temperature distribution in the inner liner 112 more uniform, avoiding local excessive temperature and inability to cool the optical fiber.

[0068] Exemplarily, each section of the housing 111 may be installed with 1, 2, 3, 4, 5 or other groups of gas path interfaces 131 at intervals, which is not specifically limited in the embodiments of the present application.

[0069] It should be noted that the outer shell 111 is composed of multiple shell sections, which can be fixed by bolts. The design of the multiple shell sections is convenient for transportation, installation and maintenance. In some scenarios, the number of shells can be increased to increase the length of the inner liner 112, thereby extending the time for the optical fiber to pass through the inner liner 112, so that the optical fiber can be reduced to a specified temperature.

[0070] As an optional implementation, the optical fiber drawing cooling device 100 further includes a temperature sensor 160 , which is disposed in the inner liner 112 . The temperature sensor 160 is configured to detect the real-time temperature of the inner liner 112 .

[0071] It is understood that the temperature sensor 160 should be as close to the optical fiber as possible to ensure that the temperature closest to the optical fiber is detected. To prevent the temperature sensor 160 from interfering with the optical fiber drawing path, a miniaturized, non-contact sensor, such as an infrared sensor, can be used. The temperature sensor 160 can be connected to the PLC, which is then connected to the main control computer. The temperature sensor 160 can monitor the temperature of the inner tank 112 in real time, transmit the data to the PLC, and then upload the data from the PLC to the main control computer for centralized processing, storage and analysis.

[0072] For example, a minimum warning temperature, such as 18°C, and a maximum warning temperature can be set in the PLC. The maximum warning temperature ensures that the optical fiber coating layer after coating does not generate bubbles due to high temperature, such as 25°C; the chiller 122 sets the circulating water cooling temperature, such as 15°C, which is usually at a normal circulation speed; the main control computer controls the drawing speed to quickly increase from less than 100 meters / minute to 2500-3000 meters / minute. At this time, the heat of the optical fiber itself will be dissipated into the inner tank 112 to quickly increase its internal temperature. When the temperature sensor 160 monitors in real time that the internal temperature exceeds 25°C, it will be fed back to the main control in time. Computer, the main control computer controls the chiller 122 through PLC to increase the circulating water circulation speed to reduce the temperature of the inner tank 112; if the chiller 122 is increased to the highest circulating water circulation speed, and the temperature sensor 160 monitors in real time that the internal temperature is still above 25°C, the main control computer increases the helium flow rate through MFC to further improve the cooling effect; when the internal temperature drops to 18°C, the main control computer controls the chiller 122 through PLC to reduce the circulating water circulation speed and closes the helium flow rate through MFC to reduce costs, and so on, the best optical fiber coating effect can be achieved through the lowest material cost control.

[0073] The following is an example of how cleaning works after optical fiber drawing is completed.

[0074] After the optical fiber drawing is completed, the main control computer loosens the traction rope 142 through the pneumatic switch 143, and the heat sink 141 naturally droops and fits to the inner wall of the inner tank 112 due to its weight; the gas pipeline 132 is adjusted to connect with the compressed air source through the MFC; the chiller 122 is controlled by the PLC to reduce to the minimum circulation speed; after the above steps are completed, the optical fiber reserved in the inner tank 112 will not be completely attached to the inner wall of the inner tank 112 due to the obstruction of the heat sink 141, thereby reducing the adhesion, and the shutter device 150 is opened, so that the employee can easily pull out the reserved optical fiber from the upper mouth of the inner tank 112; after the remaining optical fiber is pulled out, the main control computer opens the compressed air through the MFC to blow and clean the inside of the inner tank 112, and blows dust, broken optical fibers, etc. out of the cooling tube inner tank 112, thereby reducing the labor intensity of employees and reducing the safety hazards caused by employees going up and down stairs quickly.

[0075] The optical fiber drawing cooling device 100 provided in the present application includes an equipment body 110, a water circulation device 120, an air supply device 130 and a heat dissipation component 140; the equipment body 110 includes an outer shell 111 and an inner liner 112, the inner liner 112 is embedded in the outer shell 111, and the inner liner 112 is configured to pass through the optical fiber; the water circulation device 120 is connected to the outer shell 111, and the water circulation device 120 is configured to cool the gas in the inner liner 112 and the outer shell 111; the air supply device 130 is connected to the inner liner 112, and the air supply device 130 is configured to pass gas into the inner liner 112; the heat dissipation component 140 is arranged in the inner liner 112, and the heat dissipation component 140 is configured to cool the gas in the inner liner 112. The optical fiber drawing cooling device 100 provided in the present application absorbs the heat of the gas in the inner liner 112 through the heat dissipation component 140, which can reduce the gas usage and improve the cooling efficiency.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. An optical fiber drawing cooling device, characterized in that: The optical fiber drawing cooling device (100) comprises an equipment body (110), a water circulation device (120), an air supply device (130) and a heat dissipation component (140); the equipment body (110) comprises an outer shell (111) and an inner shell (112); the inner shell (112) is nested inside the outer shell (111), and the inner shell (112) is configured to be provided with an optical fiber; the water circulation device (120) is communicated with the outer shell (111), and the water circulation device (120) is configured to cool down the gas in the inner shell (112) and the outer shell (111); the air supply device (130) is communicated with the inner shell (112), and the air supply device (130) is configured to pass gas into the inner shell (112); the heat dissipation component (140) is arranged in the inner shell (112), and the heat dissipation component (140) is configured to cool down the gas in the inner shell (112).

2. The optical fiber drawing cooling device according to claim 1, characterized in that: The heat dissipation assembly (140) comprises a heat sink (141), a traction rope (142) and a pneumatic switch (143); the heat sink (141) is rotatably connected to the inner wall of the inner tank (112); one end of the traction rope (142) is connected to the heat sink (141); the other end of the traction rope (142) is connected to the pneumatic switch (143); the pneumatic switch (143) is configured to control the movement of the traction rope (142) so as to traction the heat sink (141) to rotate around the inner wall of the inner tank (112).

3. The optical fiber drawing cooling device according to claim 2, characterized in that: The heat sinks (141) are arranged in pairs along the inner wall of the inner container (112) in the diameter direction, and a plurality of pairs of heat sinks (141) are arranged at intervals along the length direction of the inner container (112); A semicircular groove (144) is provided on one side of the heat sink (141) away from the inner wall of the inner container (112); the semicircular grooves (144) of two pairs of heat sinks (141) can be butt-jointed to form a circular groove, so that the optical fiber can pass through.

4. The optical fiber drawing cooling device according to claim 3, characterized in that: Two traction ropes (142) are provided, and each traction rope (142) is connected to a plurality of heat sinks (141) on a single side of the inner wall of the inner tank (112) so as to pull the plurality of heat sinks (141) to rotate simultaneously.

5. The optical fiber drawing cooling device according to any one of claims 1 to 4, characterized in that: The optical fiber drawing cooling device (100) further comprises a shutter device (150), wherein the shutter device (150) is openably and closably arranged at the openings at the upper and lower ends of the inner container (112), and the shutter device (150) is configured to prevent the gas in the inner container (112) from quickly escaping.

6. The optical fiber drawing cooling device according to claim 1, characterized in that: The water circulation device (120) comprises a high-pressure water pipe (121) and a water chiller (122); the housing (111) is provided with a water inlet (123) and a water return port (124); the water inlet (123) and the water return port (124) are connected to the water chiller (122) via the high-pressure water pipe (121) to form a circulating water circuit.

7. The optical fiber drawing cooling device according to claim 6, characterized in that: The chiller (122) comprises a circulating water pump, which is configured to drive the circulating water to circulate and adjust the circulating water circulation speed.

8. The optical fiber drawing cooling device according to claim 1, characterized in that: The gas supply device (130) comprises a gas circuit interface (131) and a gas pipeline (132); the gas circuit interface (131) is arranged on the outer shell (111) and communicates with the inner liner (112); the gas circuit interface (131) is connected to a plurality of gas sources via the gas pipeline (132) so as to introduce different gases into the inner liner (112).

9. The optical fiber drawing cooling device according to claim 6, characterized in that: The gas path interfaces (131) are arranged in pairs along two sides of the outer shell (111) in a diameter direction; The outer shell (111) comprises a plurality of shell sections, each shell section being provided with a plurality of pairs of gas path interfaces (131), and the plurality of pairs of gas path interfaces (131) being arranged at intervals along the length direction of the shell.

10. The optical fiber drawing cooling device according to claim 1, characterized in that: The optical fiber drawing cooling device (100) further comprises a temperature sensor (160), wherein the temperature sensor (160) is disposed in the inner container (112), and the temperature sensor (160) is configured to detect the real-time temperature of the inner container (112).

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