Optical fiber coating cooling device

Abstract

The present invention provides a fiber coating cooling device, which belongs to the field of fiber processing technology. The fiber coating cooling device comprises a fixed structure, a primary coating body, a cooling cylinder and a secondary coating body arranged in sequence from top to bottom. The cooling cylinder is sleeved on the bottom of the primary coating body. The primary coating body and the cooling cylinder are slidably connected in the axial direction. The volume of the first cooling cavity inside the cooling cylinder is changed by adjusting the height of the cooling cylinder. A flow blocking cavity is provided in the secondary coating body. The lower end of the flow blocking cavity is connected to a spraying hood. The spraying hood rotates around the central axis. A plurality of spraying holes are provided on the inner wall of the spraying hood to spray the fiber coating material passing through the interior. The cured bare optical fiber enters the cooling cylinder. The temperature inside the cooling cylinder is low, so that the temperature of the cured bare optical fiber is reduced. The first cooling cavity can adjust its volume as needed, change the heat exchange stroke of the cured bare optical fiber in the cooling cavity, and perform adaptive adjustment according to the surrounding environment.

Description

Technical Field

[0001] The invention belongs to the technical field of optical fiber processing, and in particular relates to an optical fiber coating cooling device. Background Art

[0002] During the fiber drawing process, the fiber needs to be coated on the surface. As an important part of fiber production, coating has a crucial impact on the quality of finished fiber. The fiber coating is a polymer material layer coated to protect the bare fiber, improve the mechanical strength and microbending strength of the fiber, and reduce attenuation. The main component of bare fiber is silicon dioxide, which is a brittle and fragile material with poor bending resistance and toughness. If several such bare fibers are bundled into a bundle, they are very easy to wear each other, resulting in damage to the fiber surface and affecting the transmission performance of the fiber. At the same time, when the fiber is drawn, the probability of surface defects and microcracks is very small, but if it encounters water in the air, a hydration reaction will occur to break the Si-O bond and produce Si-OH groups, which will cause cracks in the fiber. If there are already microcracks, the cracks will expand, and eventually the fiber strength will be reduced or broken. The way to overcome this is to coat the surface of the bare fiber with ultraviolet (UV) curing polymer to protect it, and then coat the surface of the cured coating with a layer of polymer material to prevent water molecules from contacting the Si-O bonds.

[0003] The existing optical fiber coating process realizes primary coating and secondary coating at different path positions. UV curing is also required after primary coating to prevent the secondary coating resin from mixing with the primary coating resin. When coating the resin for the second time, the temperature needs to be quickly cooled down so that the resin can be quickly cooled down and solidified. However, the cooling rate of the secondary coating resin is affected by the external environment temperature. The external environment with different temperatures affects the internal cooling rate and the molding effect of the optical fiber surface coating after coating. Summary of the invention

[0004] The purpose of the present invention is to address the above-mentioned problems in the prior art and to propose an optical fiber coating cooling device. The technical problem to be solved by the invention is: how to achieve adaptation to the external environment during cooling.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] An optical fiber coating cooling device comprises a fixed structure, a primary coating body, a cooling cylinder and a secondary coating body which are arranged in sequence from top to bottom. The optical fiber passes through the primary coating body, the cooling cylinder and the secondary coating body in sequence. The fixed structure is fixed to the top of the cooling cylinder, the cooling cylinder is sleeved on the bottom of the primary coating body, and the secondary coating body is fixedly connected to the lower end of the cooling cylinder. The primary coating body is slidably connected to the cooling cylinder in the axial direction. The volume of the first cooling cavity inside the cooling cylinder is changed by adjusting the height of the cooling cylinder. A circle of cold air cylinder is fixed on the inner wall of the first cooling cavity. The cold air cylinder The cylinder is located at the lower part of the first cooling cavity, and a plurality of horizontal cooling fins are fixed on the inner wall of the cold air cylinder. Cold air is introduced into the cold air cylinder to realize cooling of the first cooling cavity. A choke cavity is provided in the secondary coating body, and the upper end of the choke cavity is connected with the first cooling cavity, and the lower end of the choke cavity is connected with a spray hood, which rotates around the central axis, and a plurality of spray holes are provided on the inner wall of the spray hood for spraying the optical fiber passing through the inside with a coating material. A second cooling cavity is connected below the spray hood, and the first cooling cavity and the second cooling cavity are connected with the first cold air duct and the second cold air duct on the corresponding side walls respectively.

[0007] The bare optical fiber passes through the primary coating body, the cooling cylinder, and the secondary coating body in sequence. The air first sent into the primary coating body blows away dust and other impurities on the surface of the bare optical fiber, keeping the surface of the bare optical fiber smooth and clean. The bare optical fiber contacts the UV curing polymer in the primary coating body and is cured and formed on the surface of the bare optical fiber. The cured bare optical fiber enters the cooling cylinder. The temperature in the cooling cylinder is low, which reduces the temperature of the cured bare optical fiber. The volume of the first cooling chamber can be adjusted as needed to change the heat exchange stroke of the cured bare optical fiber in the cooling chamber, and the adaptive adjustment is made according to the surrounding environment. The cooled optical fiber is sent into the secondary coating body, and the spray hood rotates to spray the surface of the optical fiber evenly, so that the material is sprayed evenly. The temperature of the optical fiber itself is low during spraying, which is conducive to the rapid cooling of the material. After spraying, the optical fiber enters the second cooling chamber and is cooled again. The temperature is cooled from both inside and outside of the optical fiber spray layer to improve the cooling effect.

[0008] An air cavity is provided inside the primary coating body, the top of the air cavity extends to the top of the primary coating body, the top of the air cavity is set as an input port, a model hole is provided at the bottom of the air cavity, the model hole extends to the bottom of the primary coating body, and the bottom of the model hole is connected to a UV curing component; a storage cavity surrounding the outside of the air cavity is provided in the primary coating body, a plurality of feed cavities are connected at the bottom of the storage cavity, the feed cavity is connected to the middle of the model hole at an angle downward, and a feed pipe is connected to the outer wall of the storage cavity.

[0009] With the above structure, the UV-curable polymer enters the mold hole through the feed cavity to contact the optical fiber and is coated on the surface of the bare optical fiber.

[0010] The side wall of the air cavity is an inclined surface, the area of ​​the input port is smaller than the area of ​​the bottom of the air cavity, a circle of blowing boxes is fixed on the bottom side wall of the air cavity, a plurality of upwardly inclined air holes are opened on the blowing box, and the blowing box is connected to the air inlet pipe.

[0011] With the above structure, the air delivered into the air cavity flows upward and gathers at the input port to form air with a faster flow rate, which quickly blows the surface of the bare optical fiber delivered, blows away the dust attached to the surface of the bare optical fiber, and reduces the attachments on the surface of the bare optical fiber.

[0012] A flow-blocking protrusion is fixed at the bottom of the wind cavity, the upper surface of the flow-blocking protrusion is a spherical surface, the flow-blocking protrusion is located at the upper end of the model hole, and the model hole extends to the upper surface of the flow-blocking protrusion.

[0013] With the above structure, the air blown onto the flow-blocking protrusion flows upward along the surface thereof, thereby preventing the air from directly blowing onto the top of the model hole and then entering therein.

[0014] A plurality of sliding blocks are fixed on the inner wall of the cooling cylinder, and the plurality of sliding blocks are on the same horizontal plane. A vertical slide groove is opened on the outer wall of the primary coating body corresponding to each sliding block. The sliding block is slidably connected in the corresponding slide groove, and the sliding block moves up and down in the slide groove. A plurality of vertical electric cylinders are fixed on the outer wall of the primary coating body, and the output end of the electric cylinder is fixedly connected to the cooling cylinder.

[0015] With the above structure, the electric cylinder drives the cooling cylinder to move in the axial direction. The volume of the first cooling cavity inside the cooling cylinder is changed by adjusting the height of the cooling cylinder. The volume of the first cooling cavity is changed by the length of the primary coating body extended therein, thereby changing the length of the exposed optical fiber in the first cooling cavity and adjusting the cooling time.

[0016] An insulation structure is arranged at the bottom of the cooling cylinder, and the insulation structure includes an upper insulation plate and a lower insulation plate. Both the upper insulation plate and the lower insulation plate are annular plates, and both are made of insulation materials. The upper insulation plate and the lower insulation plate are arranged in parallel. The center hole of the upper insulation plate is connected to the first cooling cavity, and the center hole of the lower insulation plate is connected to the flow-blocking cavity. An exhaust cavity is arranged between the upper insulation plate and the lower insulation plate, and an exhaust pipe is connected to the exhaust cavity.

[0017] By adopting the above structure, the upper insulation board and the lower insulation board are used to block the heat diffusion, thereby avoiding the heat exchange between the secondary coating body and the first cooling cavity. The air is drawn outwards through the exhaust cavity to draw out the air at the center hole position, so that the cold air moved between the upper insulation board and the lower insulation board is drawn out, thereby reducing the cold air entering the secondary coating body.

[0018] The opening areas of the upper and lower ends of the choke cavity are both smaller than the cross-sectional area of ​​the middle thereof, and the inner wall of the choke cavity is an inclined surface, so that the upwardly flowing air slows down its flow velocity at the middle position of the choke cavity.

[0019] With the above structure, the upward-flowing air slows down its flow rate when it reaches the middle part of the choke chamber, and the upper opening is reduced, thereby reducing the amount of air extracted, allowing the lower air to continue in the choke chamber, thereby blocking the air entering the choke chamber from below, so that the upward-flowing air acts as a buffer when passing through the choke chamber, which is beneficial for the upper exhaust chamber to extract the internal hot air and cold air, avoiding the contact of the cold air with the spray hood below, and ensuring that the materials in the spray hood can be sprayed out at a certain temperature, thereby avoiding cooling and solidification before spraying.

[0020] The outer wall of the spray hood is rotatably connected to the bottom of the choke chamber through a bearing, and a horizontal feed box is provided below the spray hood, and the feed box is connected to a feed pipe, and a circle of sealed material guide grooves is fixed on the upper surface of the feed box, and the sealed material guide grooves are connected to the inside of the feed box, and the lower end of the spray hood extends into the sealed material guide groove, and the spray hood is connected to the inside of the sealed material guide groove, and the lower end of the spray hood moves around the central axis in the sealed material guide groove, and the spray hood and the inner wall of the sealed material guide groove are sealed; a drive assembly is connected to the spray hood.

[0021] With the above structure, the spraying material in the feeding box enters the spraying hood from the sealed material guide groove, so that the spraying material is continuously fed into the rotating spraying hood.

[0022] The driving assembly includes a gear ring, a driving gear and a motor. The gear ring is fixed around the outside of the spray hood, the driving gear is meshed with the gear ring, the driving gear is connected to the output shaft of the motor, the motor is fixed inside the secondary coating body, and the motor drives the driving gear to rotate.

[0023] With the above structure, the machine drives the active gear to rotate, and the motor drives the gear to rotate, driving the spraying center to rotate.

[0024] The bottom of the second cooling cavity is a funnel-shaped structure, the bottom of the second cooling cavity is arranged as an output port, and a heat insulating layer is arranged on the inner wall of the second cooling cavity.

[0025] By adopting the above structure, the low temperature environment inside the second cooling chamber is maintained, so that the sprayed optical fiber is cooled again in the second cooling chamber, thereby improving the cooling effect.

[0026] Compared with the prior art, the optical fiber coating cooling device has the following advantages:

[0027] 1. The cured bare optical fiber enters the cooling cylinder, where the temperature is low, which reduces the temperature of the cured bare optical fiber. The volume of the first cooling chamber can be adjusted as needed to change the heat exchange stroke of the cured bare optical fiber in the cooling chamber. The chamber can be adaptively adjusted according to the surrounding environment, and flexible operation and adjustment can be performed in terms of energy saving and consumption reduction and cooling effect.

[0028] 2. The optical fiber is cooled before and after the secondary spraying, so that the sprayed material is sprayed directly on the low-temperature optical fiber. After spraying, the material is cooled from the outside, so that the sprayed material is cooled quickly and the cooling effect is improved.

[0029] 3. The cooling chamber is connected to the secondary spraying below with a heat-insulating structure to block the heat exchange between the cooling chamber and the secondary spraying, ensuring that the structure of the secondary spraying will not be affected by the low-temperature cooling chamber, maintaining the fluidity of the internal material, and preventing the material from cooling and adhering to the inside of the equipment.

[0030] 4. A circle of blowing boxes is fixed on the side wall at the bottom of the air cavity. The blowing boxes are provided with multiple upward-inclined air holes. Air is sent into the air cavity through the blowing boxes. When the optical fiber enters the equipment, flowing air is sent into the air cavity and blows on the surface of the bare optical fiber to blow away the dust and other debris attached to the surface, keeping the surface of the bare optical fiber smooth and clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0032] Figure 2 It is a schematic diagram of the top structure of the present invention.

[0033] Figure 3 It is a right-side structural schematic diagram of the present invention.

[0034] Figure 4 yes Figure 2 Schematic diagram of the structure of AA.

[0035] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of B.

[0036] Figure 6 yes Figure 4 Schematic diagram of the enlarged structure of C in the figure.

[0037] Figure 7 yes Figure 4 Schematic diagram of the enlarged structure of D in the figure.

[0038] Figure 8 It is a schematic diagram of the internal structure of the primary coating body in the present invention.

[0039] Fig. 9 It is a schematic diagram of the internal structure of the cooling cylinder in the present invention.

[0040] Fig.10 It is a schematic diagram of the internal structure of the spray hood in the present invention.

[0041] In the figure, 1, primary coating body; 2, cooling cylinder; 3, secondary coating body; 4, fixing structure; 5, input port; 6, output port; 7, electric cylinder; 8, storage chamber; 9, feeding chamber; 10, model hole; 11, air chamber; 12, blowing box; 13, flow blocking protrusion; 14, sliding block; 15, slide; 16, feeding pipe; 17, UV curing component; 18, first cooling chamber; 19, cold air Cylinder; 20, cooling fins; 21, center hole; 22, upper insulation board; 23, lower insulation board; 24, exhaust chamber; 25, exhaust pipe; 26, flow blocking chamber; 27, bearing; 28, spray hood; 29, feed box; 30, sealed guide trough; 31, gear ring; 32, driving gear; 33, motor; 34, feed pipe; 35, first cold air pipe; 36, second cold air pipe; 37, second cooling chamber. Implementation

[0042] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0043] like Figure 1-Figure 10 As shown, this embodiment provides an optical fiber coating cooling device, including a fixed structure 4, a primary coating body 1, a cooling cylinder 2 and a secondary coating body 3 arranged in sequence from top to bottom, the optical fiber passes through the primary coating body 1, the cooling cylinder 2 and the secondary coating body 3 in sequence, the fixed structure 4 is fixed on the top of the cooling cylinder 2, and bolt holes are provided on the fixed structure 4. The fixed structure 4 is fixed by bolts to fix the entire coating cooling device.

[0044] An air cavity 11 is provided inside the primary coating body 1, and the top of the air cavity 11 extends to the top of the primary coating body 1. The top of the air cavity 11 is set as an input port 5, and the bare optical fiber is fed into the interior of the device from the input port 5. The side wall of the air cavity 11 is an inclined surface, and the area of ​​the input port 5 is smaller than the area of ​​the bottom of the air cavity 11. The air fed from the bottom flows upward and gathers at the position of the input port 5 to form air with a faster flow rate, which quickly blows the surface of the bare optical fiber fed in, blows away the dust and the like attached to the surface of the bare optical fiber, and reduces the attachments on the surface of the bare optical fiber. A circle of blowing boxes 12 is fixed on the bottom side wall of the air cavity 11, and a plurality of upwardly inclined air holes are provided on the blowing box 12. The blowing box 12 is connected to the air inlet pipe, and air is fed into the air cavity 11 through the blowing box 12; a model hole 10 is provided at the bottom of the air cavity 11, and the bare optical fiber is blown out from the model hole 10. The bare optical fiber contacts the UV-curing polymer in the model hole 10 and is coated on the outside of the bare optical fiber. The molded coated optical fiber is sent out from the model hole 10. The bottom of the model hole 10 is connected with an ultraviolet irradiation curing component 17. The molded optical fiber is quickly cured and formed under the action of the ultraviolet irradiation curing component 17. A storage cavity 8 surrounding the outside of the wind cavity 11 is provided in the primary coating body 1. The bottom of the storage cavity 8 is connected with a plurality of feed cavities 9. The feed cavities 9 are connected with the middle part of the model hole 10 at an angle downward. The outer wall of the storage cavity 8 is connected with a feed pipe 16. The flowing UV-curing polymer is firstly fed into the storage cavity 8, and then evenly fed into the model hole 10 through the feed cavity 9 at the bottom to contact the optical fiber in the model hole 10.

[0045] A baffle protrusion 13 is fixed to the bottom of the wind cavity 11, and the upper surface of the baffle protrusion 13 is a spherical surface. The baffle protrusion 13 is located at the upper end of the model hole 10, and the model hole 10 extends to the upper surface of the baffle protrusion 13. The baffle protrusion 13 is located at the top of the model hole 10, so that the air blown on the baffle protrusion 13 flows upward along its surface, avoiding the air from directly blowing on the top of the model hole 10 and entering it.

[0046] The cooling cylinder 2 is sleeved on the bottom of the primary coating body 1, the secondary coating body 3 is fixedly connected to the lower end of the cooling cylinder 2, and the primary coating body 1 is slidably connected to the cooling cylinder 2 in the axial direction. Specifically, a plurality of sliding blocks 14 are fixed on the inner wall of the cooling cylinder 2, and the plurality of sliding blocks 14 are on the same horizontal plane. A vertical slide groove 15 is provided on the outer wall of the primary coating body 1 corresponding to each sliding block 14. The sliding block 14 is slidably connected in the corresponding slide groove 15. The sliding block 14 moves up and down in the slide groove 15 to change the depth of the primary coating body 1 extending into the cooling cylinder 2. A plurality of vertical electric cylinders 7 are fixed on the outer wall of the primary coating body 1, and the output end of the electric cylinder 7 is fixedly connected to the cooling cylinder 2. The electric cylinder 7 drives the cooling cylinder 2 By moving in the axial direction, the volume of the first cooling chamber 18 inside the cooling cylinder 2 is changed by adjusting the height thereof. The volume of the first cooling chamber 18 is changed by the length of the inserted primary coating body 1, thereby changing the length of the exposed optical fiber in the first cooling chamber 18 and adjusting the cooling time. When the external ambient temperature is high, the primary coating body 1 is pulled out to maximize the volume of the internal first cooling chamber 18, prolong the contact time with the internal cold air, and improve the cooling effect. When the external ambient temperature is low, the primary coating body 1 is pushed to the innermost part to minimize the volume of the internal first cooling chamber 18, shorten the contact time with the internal cold air, reduce energy consumption, and enable the formed optical fiber to quickly enter the secondary coating operation.

[0047] A circle of cold air cylinder 19 is fixed on the inner wall of the first cooling cavity 18, and the cold air cylinder 19 is located at the lower part of the first cooling cavity 18. A plurality of horizontal cooling fins 20 are fixed on the inner wall of the cold air cylinder 19. Cold air is introduced into the cold air cylinder 19 to cool the first cooling cavity 18. The temperature in the first cooling cavity 18 is lowered by the cold air cylinder 19 and the cooling fins 20 to cool the optical fiber. A heat insulation structure is provided at the bottom of the cooling cylinder 2. The heat insulation structure includes an upper heat insulation board 22 and a lower heat insulation board 23. Both the upper heat insulation board 22 and the lower heat insulation board 23 are annular boards, and both are made of heat insulation materials. The upper heat insulation board 22 and the lower heat insulation board 23 are arranged in parallel, and the heat insulation board 22 and the lower heat insulation board 23 are arranged in parallel. The upper insulation board 22 and the lower insulation board 23 are used to block the heat diffusion, and the heat exchange between the secondary coating body 3 and the first cooling chamber 18 is avoided. The central hole of the upper insulation board 22 is connected to the first cooling chamber 18, and the central hole of the lower insulation board 23 is connected to the flow blocking chamber 26, so as to ensure that the optical fiber passes through the upper insulation board 22 and the lower insulation board 23; an exhaust chamber 24 is set between the upper insulation board 22 and the lower insulation board 23, and an exhaust pipe 25 is connected to the exhaust chamber 24. Through exhaust, the air at the center hole position is extracted, so that the cold air moved between the upper insulation board 22 and the lower insulation board 23 is extracted, and the cold air entering the secondary coating body 3 is reduced. The cooling cylinder 2 can first cool the optical fiber entering the secondary coating body 3, and the cooled optical fiber is quickly cooled after contacting the spraying material in the secondary coating body 3, thereby improving the cooling effect.

[0048] A baffle chamber 26 is provided in the secondary coating body 3, the upper end of the baffle chamber 26 is connected to the first cooling chamber 18, and the lower end of the baffle chamber 26 is connected to the spray hood 28. The opening areas of the upper and lower ends of the baffle chamber 26 are both smaller than the cross-sectional area of ​​the middle thereof. The inner wall of the baffle chamber 26 is an inclined surface, so that the upwardly flowing air slows down the flow velocity at the middle position of the baffle chamber 26, and the upper opening is reduced to reduce the amount of air extracted, so that the lower air continues to flow in the baffle chamber 26, blocking the air entering the baffle chamber 26 from below, so that the upwardly flowing air plays a buffering role when passing through the baffle chamber 26, which is beneficial for the upper exhaust chamber 24 to extract the internal hot air and cold air, avoid the cold air from contacting the spray hood 28 below, and ensure that the materials in the spray hood 28 can be sprayed outward at a certain temperature, so as to avoid cooling and solidification before spraying.

[0049] The outer wall of the spray hood 28 is rotatably connected to the bottom of the choke chamber 26 through a bearing 27. The spray hood 28 rotates around the central axis and is connected to a driving assembly. The driving assembly includes a gear ring 31, a driving gear 32 and a motor 33. The gear ring 31 is fixed around the outer side of the spray hood 28, and the driving gear 32 is meshed with the gear ring 31. The driving gear 32 is connected to the output shaft of the motor 33. The motor 33 is fixed inside the secondary coating body 3. The motor 33 drives the driving gear 32 to rotate, and the gear is driven to rotate by the motor 33, so as to drive the spray hood 28 to rotate around the center; a plurality of spray holes are provided on the inner wall of the spray hood 28 for spraying the optical fiber coating material passing through the inside, and a horizontal feed box 29 is provided below the spray hood 28. The feed box 2 9 is connected to the feed pipe 34, and a circle of sealed material guide groove 30 is fixed on the upper surface of the feed box 29. The sealed material guide groove 30 is connected to the feed box 29, and the lower end of the spray hood 28 extends into the sealed material guide groove 30, and the spray hood 28 is connected to the inside of the sealed material guide groove 30. The lower end of the spray hood 28 moves around the central axis in the sealed material guide groove 30, and the spray hood 28 and the inner wall of the sealed material guide groove 30 are sealed. The spray material in the feed box 29 enters the spray hood 28 from the sealed material guide groove 30, so that the spray material is continuously fed into the rotating spray hood 28. In order to maintain the fluidity of the internal spray material, the spray hood 28, the feed box 29 and the inner wall of the sealed material guide groove 30 are provided with a heat insulation layer to reduce heat exchange with the external environment.

[0050] A second cooling chamber 37 is connected below the spray hood 28. The bottom of the second cooling chamber 37 is a funnel-shaped structure. The bottom of the second cooling chamber 37 is set as an output port 6. An insulation layer is provided on the inner wall to maintain an internal low-temperature environment so that the sprayed optical fiber is cooled in the second cooling chamber 37. The first cooling chamber 18 and the second cooling chamber 37 are connected to the first cold air duct 35 and the second cold air duct 36 on the corresponding side walls respectively. The first cold air duct 35 and the second cold air duct 36 are connected to the cooling equipment to provide cold air.

[0051] After the optical fiber is prepared, the bare optical fiber is fed into the device from the input port 5, and passes through the primary coating body 1, the cooling cylinder 2, and the secondary coating body 3 in sequence. The air first fed into the primary coating body 1 blows away impurities such as dust on the surface of the bare optical fiber, keeps the surface of the bare optical fiber smooth and clean, and is fed into the model hole 10, contacts with the UV curing polymer in the model hole 10, and is cured and formed on the surface of the bare optical fiber. The cured bare optical fiber enters the cooling cylinder 2, and the temperature in the cooling cylinder 2 is low, so that the temperature of the cured bare optical fiber is reduced, and the first cooling chamber 18 can adjust its volume as needed, change the heat exchange stroke of the cured bare optical fiber in the cooling chamber 18, and make adaptive adjustments according to the surrounding environment; the cooled optical fiber is fed into the secondary coating body 3, and the spray hood 28 rotates to spray the surface of the optical fiber evenly, so that the material is sprayed evenly. During the spraying, the temperature of the optical fiber itself is low, which is conducive to the rapid cooling of the material. After spraying, the optical fiber enters the second cooling chamber 37 and is cooled again, and the temperature is cooled from both inside and outside of the optical fiber spray layer to improve the cooling effect.

[0052] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An optical fiber coating cooling device, comprising a fixed structure (4), a primary coating body (1), a cooling cylinder (2) and a secondary coating body (3) arranged in sequence from top to bottom, the optical fiber passes through the primary coating body (1), the cooling cylinder (2) and the secondary coating body (3) in sequence, the fixed structure (4) is fixed to the top of the cooling cylinder (2), the cooling cylinder (2) is sleeved on the bottom of the primary coating body (1), and the secondary coating body (3) is fixedly connected to the lower end of the cooling cylinder (2), characterized in that: The primary coating body (1) is slidably connected to the cooling cylinder (2) in the axial direction, and the volume of the first cooling chamber (18) inside the cooling cylinder (2) is changed by adjusting the height of the cooling cylinder (2). A circle of cold air cylinder (19) is fixed on the inner wall of the first cooling chamber (18). The cold air cylinder (19) is located at the lower part of the first cooling chamber (18). A plurality of horizontal cooling fins (20) are fixed on the inner wall of the cold air cylinder (19). Cold air is introduced into the cold air cylinder (19) to achieve cooling of the first cooling chamber (18); the secondary coating body (3) A flow blocking cavity (26) is provided inside the flow blocking cavity (26), the upper end of the flow blocking cavity (26) is connected to the first cooling cavity (18), the lower end of the flow blocking cavity (26) is connected to a spray hood (28), the spray hood (28) rotates around a central axis, a plurality of spray holes are provided on the inner wall of the spray hood (28) for spraying the optical fiber passing therethrough with a coating material; the lower part of the spray hood (28) is connected to a second cooling cavity (37), and the first cooling cavity (18) and the second cooling cavity (37) are connected to the first cold air duct (35) and the second cold air duct (36) on the corresponding side walls thereof, respectively.

2. The optical fiber coating cooling device according to claim 1, characterized in that: The primary coating body (1) is provided with an air cavity (11) inside, the top of the air cavity (11) extends to the top of the primary coating body (1), the top of the air cavity (11) is arranged as an input port (5), the bottom of the air cavity (11) is provided with a model hole (10), the model hole (10) extends to the bottom of the primary coating body (1), the bottom of the model hole (10) is connected to a UV curing component (17); a material storage cavity (8) surrounding the outside of the air cavity (11) is provided inside the primary coating body (1), the bottom of the material storage cavity (8) is connected to a plurality of material supply cavities (9), the material supply cavities (9) are connected to the middle of the model hole (10) at an angle downward, and the outer wall of the material storage cavity (8) is connected to a material feed pipe (16).

3. The optical fiber coating cooling device according to claim 2, characterized in that: The side wall of the air cavity (11) is an inclined surface, the area of ​​the input port (5) is smaller than the area of ​​the bottom of the air cavity (11), a circle of blowing boxes (12) are fixed on the side wall of the bottom of the air cavity (11), a plurality of upwardly inclined air holes are provided on the blowing box (12), and the inside of the blowing box (12) is connected to the air inlet pipe.

4. An optical fiber coating cooling device according to claim 2 or 3, characterized in that: A flow-blocking protrusion (13) is fixed to the bottom of the air cavity (11); the upper surface of the flow-blocking protrusion (13) is a spherical surface; the flow-blocking protrusion (13) is located at the upper end of the model hole (10), and the model hole (10) extends to the upper surface of the flow-blocking protrusion (13).

5. The optical fiber coating cooling device according to claim 1, characterized in that: A plurality of sliding blocks (14) are fixed on the inner wall of the cooling cylinder (2), and the plurality of sliding blocks (14) are on the same horizontal plane. A vertical sliding groove (15) is provided on the outer wall of the primary coating body (1) corresponding to each sliding block (14). The sliding block (14) is slidably connected in the corresponding sliding groove (15), and the sliding block (14) moves up and down in the sliding groove (15). A plurality of vertical electric cylinders (7) are fixed on the outer wall of the primary coating body (1), and the output end of the electric cylinder (7) is fixedly connected to the cooling cylinder (2).

6. The optical fiber coating cooling device according to claim 1, characterized in that: A heat insulation structure is provided at the bottom of the cooling cylinder (2), and the heat insulation structure includes an upper heat insulation plate (22) and a lower heat insulation plate (23). The upper heat insulation plate (22) and the lower heat insulation plate (23) are both annular plates and are both made of heat insulation materials. The upper heat insulation plate (22) and the lower heat insulation plate (23) are arranged in parallel. The center hole of the upper heat insulation plate (22) is connected to the first cooling chamber (18), and the center hole of the lower heat insulation plate (23) is connected to the flow blocking chamber (26). An exhaust chamber (24) is provided between the upper heat insulation plate (22) and the lower heat insulation plate (23), and an exhaust pipe (25) is connected to the exhaust chamber (24).

7. The optical fiber coating cooling device according to claim 6, characterized in that: The opening areas of the upper and lower ends of the flow-blocking cavity (26) are both smaller than the cross-sectional area of ​​the middle thereof, and the inner wall of the flow-blocking cavity (26) is an inclined surface, so that the flow velocity of the upwardly flowing air is slowed down at the middle position of the flow-blocking cavity (26).

8. The optical fiber coating cooling device according to claim 1, characterized in that: The outer wall of the spray hood (28) is rotatably connected to the bottom of the flow-blocking chamber (26) through a bearing (27); a horizontal feed box (29) is provided below the spray hood (28); a feed pipe (34) is connected to the feed box (29); a circle of sealed material guide grooves (30) are fixed on the upper surface of the feed box (29); the sealed material guide grooves (30) are connected to the inside of the feed box (29); the lower end of the spray hood (28) extends into the sealed material guide grooves (30); the spray hood (28) is connected to the inside of the sealed material guide grooves (30); the lower end of the spray hood (28) moves around the central axis in the sealed material guide grooves (30); the spray hood (28) and the inner wall of the sealed material guide grooves (30) are sealed; and a drive assembly is connected to the spray hood (28).

9. The optical fiber coating cooling device according to claim 8, characterized in that: The driving assembly comprises a gear ring (31), a driving gear (32) and a motor (33); the gear ring (31) is fixed around the outside of the spray hood (28); the driving gear (32) is meshedly connected with the gear ring (31); the driving gear (32) is connected to the output shaft of the motor (33); the motor (33) is fixed inside the secondary coating body (3); and the motor (33) drives the driving gear (32) to rotate.

10. The optical fiber coating cooling device according to claim 1, characterized in that: The bottom of the second cooling chamber (37) is a funnel-shaped structure, the bottom of the second cooling chamber (37) is arranged as an output port (6), and a heat insulation layer is arranged on the inner wall of the second cooling chamber (37).

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