Processing coating device for preparing invisible optical fiber based on nylon 12

Abstract

The invention belongs to the technical field of optical fiber preparation equipment, and discloses a processing coating device for preparing an invisible optical fiber based on nylon 12. The processing coating device for preparing the invisible optical fiber based on the nylon 12 comprises an outer protective shell, the left side and the right side of the outer protective shell are provided with a feeding port and a discharging port respectively, the middle of the outer protective shell is movably connected with a rotary drum, and the outer side of the outer protective shell is fixedly connected with a driving motor through a mounting plate. According to the processing coating device for preparing the invisible optical fiber based on the nylon 12, the arranged spraying mechanism is used in cooperation with a nozzle assembly, a driving motor drives a driving wheel so that a driven gear and a rotating cylinder can rotate, the coating box, a spraying pipe and a nozzle can be driven to rotate through rotation, the nozzle can conduct rotary spraying around the optical fiber, and the spraying uniformity is improved; after the nozzle assembly absorbs the waste gas and the solution steam, the waste gas and the solution steam are further pumped into the spraying pipe through the vacuum air pump and then discharged, the nozzle is pressurized, the spraying effect is further improved, spraying is more uniform, and meanwhile the spraying effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber preparation equipment, and in particular to a coating device for preparing invisible optical fiber based on nylon 12. Background Art

[0002] Optical fiber is the abbreviation of optical fiber, which is a fiber made of glass or plastic that can be used as a light transmission tool. The transmission principle is "total reflection of light". The insulator of optical fiber is often a composite system, which includes a base coat and an outer coat. The selectivity of the base coat coating device is often to provide certain functions, such as thermal stability, direct solderability, solvent resistance, etc. The general base coats are polyester, polyamide, etc., but nylon 12 has the characteristic of low water absorption, which makes it better to protect the optical fiber when using this material. When the outer coating of the optical fiber is performed, a coating device is required for processing.

[0003] When the existing invisible optical fiber coating device is in use, the traditional coating device cannot ensure the uniform distribution of the coating on the surface of the optical fiber, which may cause uneven coating thickness and affect the performance of the optical fiber. At the same time, the operating environment is not clean, and the exhaust gas and solvent vapor generated during the coating process are not effectively treated, affecting the coating quality and the health of the operator. Summary of the invention

[0004] The purpose of the present invention is to provide a coating device for preparing invisible optical fiber based on nylon 12, which effectively solves the problem that when the existing invisible optical fiber coating device is in use, the traditional coating device cannot ensure the uniform distribution of the coating on the surface of the optical fiber, which may cause uneven coating thickness and affect the performance of the optical fiber. At the same time, the operating environment is not clean, and the exhaust gas and solvent vapor generated during the coating process are not effectively treated, which affects the coating quality and the health of the operator.

[0005] To achieve the above purpose, the present invention is implemented through the following technical solutions: a coating device for preparing invisible optical fiber based on nylon 12, comprising an outer protective shell, a feed port and a discharge port are respectively arranged on the left and right sides of the outer protective shell, a rotating drum is movably connected to the middle part of the outer protective shell, a driving motor is fixedly connected to the outer side of the outer protective shell through a mounting plate, a driving wheel is fixedly connected to the output end of the driving motor, the driving wheel is meshingly connected to a driven gear, the driven gear is fixedly connected to the outer side of the rotating drum, a spraying mechanism is arranged on the outer side of the outer protective shell, and a dust removal mechanism is arranged inside the outer protective shell;

[0006] The spraying mechanism comprises:

[0007] A material storage box, the material storage box is fixedly connected to the outside of the outer protective shell;

[0008] A feed hopper, the feed hopper is fixedly connected to the upper surface of the storage box;

[0009] A connecting pipe, wherein the connecting pipe is movably connected to the left side of the material storage box, and the right end of the connecting pipe is arranged inside the material storage box and movably sealed to the inner side of the material storage box through a clamping plate;

[0010] A coating box, the coating box is fixedly connected to the inner side of the rotating drum, and the coating box is connected to the left end of the connecting pipe;

[0011] A spray pipe, one end of which is fixedly connected to the inner side of the coating box;

[0012] A nozzle, the nozzle being fixedly connected to the other end of the spray pipe;

[0013] A baffle, the baffle being fixedly connected to the outside of the spray pipe;

[0014] An interception plate, wherein the interception plate is fixedly connected to the inner side of the baffle plate, and the inner side of the nozzle extends to the inner side of the interception plate;

[0015] The nozzle assembly is arranged inside the spray pipe and is used for processing waste gas and solution vapor generated by spraying.

[0016] Through the above technical solution, when the coating box rotates with the rotating drum, the device drives the spray pipe and the nozzle to rotate according to the rotating coating box, so that the coating and the optical fiber are in more comprehensive contact, while improving the uniformity and quality of the optical fiber coating.

[0017] Preferably, a cylinder is fixedly connected to the inside of the outer protective shell, an output end of the cylinder is fixedly connected to one end of a telescopic rod, the other end of the telescopic rod is fixedly connected to a lamination ring, an inner wall of the outer protective shell is fixedly connected to one end of a positioning rod, and the other end of the positioning rod is movably connected to a positioning ring via a pin.

[0018] Through the above technical solution, the cylinder drives the telescopic rod to move and further drives the lamination ring to change the inner diameter of the lamination ring, which is convenient for adjustment according to the thickness of the optical fiber coating and easy to use, avoiding the situation where the lamination ring cannot move and damages the optical fiber coating.

[0019] Preferably, the dust removal mechanism includes a connecting rod, one end of the connecting rod is fixedly connected to the inner side of the rotating drum, the other end of the connecting rod is fixedly connected to a movable rod, the outer side of the movable rod is movably connected to the inner side of a guide groove provided in the outer protective shell, one end of the support rod is fixedly connected to the inner wall of the outer protective shell, the other end of the support rod is fixedly connected to the dust removal box, the inner wall of the dust removal box is fixedly connected to a partition, the other end of the connecting rod passes through the dust removal box, extends to the inner side of the dust removal box and is fixedly connected to a dust removal brush, a liquid outlet cavity is provided in the middle part of the connecting rod, and the liquid outlet cavity is provided on the inner side of the dust removal box, and the bottom end of the liquid outlet cavity contacts with the dust removal brush, a fixed block is fixedly connected to the right side of the dust removal box, the fixed block is fixedly connected to a drying box, and a heating wire is provided on the inner side of the drying box.

[0020] Through the above technical scheme, cleaning liquid is stored inside the dust removal box in the dust removal mechanism of the present application, and the connecting rod and the movable rod are driven to rotate by the rotating drum, thereby generating centrifugal force, and part of the liquid inside the dust removal box is thrown out and contacts with the dust removal brush to remove the dust on the surface of the optical fiber, and then the water stains are removed through the drying box to prevent dust from affecting the coating effect, thereby further improving the coating effect.

[0021] Preferably, the nozzle assembly includes an air inlet pipe, a vacuum pump, a sealing box, a sealing sheet, a return spring and a discharge hole; one end of the air inlet pipe is fixedly connected to the inner side of the intercepting plate; the other end of the air inlet pipe passes through the spray pipe, extends to the inner side of the spray pipe and is fixedly connected to the sealing box; the inner side of the sealing box is fixedly connected to the vacuum pump, and the air inlet pipe is connected to the air inlet of the vacuum pump; the lower surface of the sealing box is movably connected to a sealing sheet via a through hole, a return spring is sleeved on the outer side of the sealing sheet, and a discharge hole is provided on the lower surface of the sealing box.

[0022] Through the above technical scheme, the present application uses the air intake pipe and the vacuum exhauster provided in the nozzle assembly to absorb the waste gas and solution vapor generated after the solution sprayed from the nozzle is coated, thereby preventing the waste gas and solution vapor from affecting the spraying effect and affecting the health of the workers.

[0023] Preferably, the intercepting plate is configured as an annular plate, and arc bends are provided on both left and right sides of the intercepting plate, and the bending direction faces the nozzle.

[0024] Preferably, the top end of the sealing box is configured to be conical with the cone head facing the coating box.

[0025] Preferably, the liquid outlet cavity is arranged in a Y shape, and the top end of the liquid outlet cavity is arranged on the inner side of the dust removal box and is connected with the interior of the dust removal box.

[0026] Through the above technical solution, the present application sets up a Y-shaped liquid outlet cavity so that when the movable rod rotates, it stirs the liquid inside the dust removal box and simultaneously cooperates with the centrifugal force generated to throw out part of the liquid and allow the liquid to fully contact the dust removal brush through the liquid outlet cavity.

[0027] Preferably, there are four spray pipes in total, and the four spray pipes are arranged in a ring on the inner side of the coating box with the central axis of the coating box as a reference.

[0028] Through the above technical solution, the present application uses multiple spray tubes to spray the outer wall of the optical fiber to facilitate all-round spraying. At the same time, the relative position of the spray tube and the optical fiber can be changed according to the rotation of the drum, making the optical fiber coating more uniform.

[0029] Preferably, the lamination ring is configured as a layered design, the inner side of the lamination ring is connected to a movable plate through a cavity, and the outer side of the movable plate contacts the edge of the lamination ring, which is used to follow the movement of the lamination ring to change the diameter of the lamination ring.

[0030] Through the above technical solution, the present application controls the telescopic rod to move up and down through the cylinder while pulling the lamination ring to move, and further follows the movement of the lamination ring through the movable plate to form a circular ring with changeable diameter, which is convenient for adjustment according to different thickness requirements.

[0031] By adopting the above technical solution, the beneficial effects of the present invention are:

[0032] 1. The coating device for preparing invisible optical fiber based on nylon 12 uses a spraying mechanism in conjunction with a nozzle assembly. The driving motor drives the driving wheel to rotate the driven gear and the drum, and then the coating box, the spray pipe and the nozzle are rotated to rotate, so that the nozzle performs rotational spraying around the optical fiber to improve the uniformity of the spraying. At the same time, the nozzle assembly absorbs the exhaust gas and solution vapor, and then further draws them into the spray pipe through a vacuum pump and discharges them, and pressurizes the nozzle to further improve the spraying effect, making the spraying more uniform and improving the spraying effect.

[0033] 2. The coating device for preparing invisible optical fiber based on nylon 12 uses a dust removal box, a dust removal brush and a drying box in combination with the dust removal component. The liquid inside the dust removal box is absorbed by the dust removal brush and then the surface of the optical fiber is rotated for dust removal. Subsequently, the undried water stains enter the drying box and are removed through the drying box to avoid dust adhering to the surface of the optical fiber and affecting the spraying effect.

[0034] 3. The coating device for preparing invisible optical fiber based on nylon 12 uses a vacuum exhauster to absorb the waste gas and solution vapor generated by the solution sprayed out of the nozzle through the nozzle assembly, thereby avoiding the exhaust gas and solution vapor being discharged and causing the operator to inhale and affect the health. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a stereogram of the present invention;

[0036] Figure 2 It is the front view of the present invention;

[0037] Figure 3 A top view of the present invention;

[0038] Figure 4 For the present invention Figure 3 Cross-sectional view at AA in the middle;

[0039] Figure 5 For the present invention Figure 4 The enlarged stereogram at B in the middle;

[0040] Figure 6 For the present invention Figure 4 Enlarged view of point C in the middle.

[0041] In the figure: 1 outer protective shell, 2 feed port, 3 discharge port, 4 rotating drum, 5 driving motor, 6 driving wheel, 7 driven gear, 8 spraying mechanism, 81 storage box, 82 feed hopper, 83 connecting pipe, 84 coating box, 85 spraying pipe, 86 nozzle, 87 baffle, 88 intercepting plate, a nozzle assembly, a1 air inlet pipe, a2 vacuum pump, a3 sealing box, a4 sealing sheet, a5 return spring, a6 discharge hole, 9 dust removal mechanism, 91 connecting rod, 92 movable rod, 93 supporting rod, 94 dust removal box, 95 partition, 96 liquid outlet cavity, 97 dust removal brush, 98 fixed block, 99 drying box, 910 heating wire, 10 cylinder, 11 telescopic rod, 12 lamination ring, 13 positioning rod, 14 positioning ring. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] See also Figure 1-6 The present invention provides a technical solution: a coating device for preparing invisible optical fiber based on nylon 12, comprising an outer protective shell 1, a feed port 2 and a discharge port 3 are respectively arranged on the left and right sides of the outer protective shell 1, a rotating drum 4 is movably connected to the middle of the outer protective shell 1, a driving motor 5 is fixedly connected to the outer side of the outer protective shell 1 through a mounting plate, a driving wheel 6 is fixedly connected to the output end of the driving motor 5, the driving wheel 6 is meshingly connected to a driven gear 7, the driven gear 7 is fixedly connected to the outer side of the rotating drum 4, a spraying mechanism 8 is arranged on the outer side of the outer protective shell 1, and a dust removal mechanism 9 is arranged inside the outer protective shell 1;

[0046] The spraying mechanism 8 comprises:

[0047] A material storage box 81, which is fixedly connected to the outside of the outer protective shell 1;

[0048] A feed hopper 82, the feed hopper 82 is fixedly connected to the upper surface of the storage box 81;

[0049] A connecting pipe 83, the connecting pipe 83 is movably connected to the left side of the material storage box 81, and the right end of the connecting pipe 83 is arranged inside the material storage box 81 and movably sealed to the inner side of the material storage box 81 through a card plate;

[0050] A coating box 84, which is fixedly connected to the inner side of the drum 4 and is connected to the left end of the connecting pipe 83;

[0051] A spray pipe 85, one end of which is fixedly connected to the inner side of the coating box 84;

[0052] A nozzle 86, which is fixedly connected to the other end of the spray pipe 85;

[0053] A baffle 87, the baffle 87 is fixedly connected to the outer side of the spray pipe 85;

[0054] An interception plate 88, the interception plate 88 is fixedly connected to the inner side of the baffle 87, and the inner side of the nozzle 86 extends to the inner side of the interception plate 88;

[0055] Nozzle assembly a: Nozzle assembly a is arranged inside the spray pipe 85 and is used to process waste gas and solution vapor generated by spraying.

[0056] Through the above technical solution, when the coating box 84 rotates with the drum 4, the device drives the spray tube 85 and the nozzle 86 to rotate according to the rotating coating box 84, so that the coating and the optical fiber are in contact more comprehensively, while improving the uniformity and quality of the optical fiber coating.

[0057] Reference Figure 4 As shown, the interior of the outer protective shell 1 is fixedly connected to a cylinder 10, the output end of the cylinder 10 is fixedly connected to one end of a telescopic rod 11, the other end of the telescopic rod 11 is fixedly connected to a lamination ring 12, the inner wall of the outer protective shell 1 is fixedly connected to one end of a positioning rod 13, the other end of the positioning rod 13 is movably connected to a positioning ring 14 through a pin, and the telescopic rod 11 is driven by the cylinder 10 to move and further drive the lamination ring 12 to change the inner diameter of the lamination ring 12, which is convenient for adjustment according to the thickness of the optical fiber coating and easy to use, avoiding the situation where the lamination ring 12 cannot move and damages the optical fiber coating.

[0058] Reference Figure 4 , 6As shown, the dust removal mechanism 9 includes a connecting rod 91, one end of the connecting rod 91 is fixedly connected to the inner side of the rotating drum 4, the other end of the connecting rod 91 is fixedly connected to a movable rod 92, the outer side of the movable rod 92 is movably connected to the inner side of the guide groove provided in the outer protective shell 1, the inner wall of the outer protective shell 1 is fixedly connected to one end of a support rod 93, the other end of the support rod 93 is fixedly connected to a dust removal box 94, the inner wall of the dust removal box 94 is fixedly connected to a partition 95, the other end of the connecting rod 91 passes through the dust removal box 94 and extends to the inner side of the dust removal box 94 and is fixedly connected to a dust removal brush 97, a liquid outlet cavity 96 is provided in the middle of the connecting rod 91, and the liquid outlet cavity 96 is provided with a It is placed on the inner side of the dust removal box 94, and the bottom end of the liquid outlet cavity 96 is in contact with the dust removal brush 97. The right side of the dust removal box 94 is fixedly connected with a fixed block 98, and the fixed block 98 is fixedly connected with a drying box 99. A heating wire 910 is arranged on the inner side of the drying box 99. Cleaning liquid is stored in the dust removal box 94 in the dust removal mechanism 9. The connecting rod 91 and the movable rod 92 are driven to rotate by the rotating drum 4, thereby generating centrifugal force, and part of the liquid in the dust removal box 94 is thrown out and contacts with the dust removal brush 97 to remove the dust on the surface of the optical fiber, and then the water stains are removed through the drying box 99 to prevent the dust from affecting the coating effect, thereby further improving the coating effect.

[0059] Reference Figure 4 , 5 As shown, the nozzle assembly a includes an air intake pipe a1, a vacuum pump a2, a sealing box a3, a sealing sheet a4, a return spring a5 and a discharge hole a6. One end of the air intake pipe a1 is fixedly connected to the inner side of the interception plate 88, and the other end of the air intake pipe a1 passes through the spray pipe 85 and extends to the inner side of the spray pipe 85 and is fixedly connected to the sealing box a3. The inner side of the sealing box a3 is fixedly connected to the vacuum pump a2, and the air intake pipe a1 is connected to the air inlet of the vacuum pump a2. The lower surface of the sealing box a3 is movably connected to the sealing sheet a4 through a through hole, and the outer side of the sealing sheet a4 is sleeved with a return spring a5. The lower surface of the sealing box a3 is provided with a discharge hole a6. The air intake pipe a1 and the vacuum pump a2 provided in the nozzle assembly a are used in conjunction to absorb the waste gas and solution vapor generated after the solution sprayed from the nozzle 86 is coated, so as to avoid the waste gas and solution vapor affecting the spraying effect and affecting the health of the staff.

[0060] Reference Figure 4 As shown, the intercepting plate 88 is configured as an annular plate, and arc bends are provided on both the left and right sides of the intercepting plate 88 , and the bending direction faces the nozzle 86 .

[0061] Reference Figure 4 , 5 As shown, the top end of the sealing box a3 is configured to be conical with the cone head facing the coating box 84 .

[0062] Reference Figure 4 , 6As shown, the liquid outlet chamber 96 is configured to be Y-shaped, and the top of the liquid outlet chamber 96 is configured to be disposed on the inner side of the dust removal box 94 and is connected to the interior of the dust removal box 94. The Y-shaped liquid outlet chamber 96 enables the movable rod 92 to stir the liquid inside the dust removal box 94 when rotating, and at the same time, the centrifugal force generated is used to throw out part of the liquid and allow the liquid to fully contact the dust removal brush 97 through the liquid outlet chamber 96.

[0063] Reference Figure 4 As shown, there are four spray tubes 85 in total, and the four spray tubes 85 are arranged in a ring on the inner side of the coating box 84 based on the central axis of the coating box 84. Multiple spray tubes 85 spray the outer wall of the optical fiber to facilitate all-round spraying. At the same time, the relative position of the spray tube 85 and the optical fiber can be changed according to the rotation of the drum 4, so that the optical fiber coating is more uniform.

[0064] Reference Figure 4 As shown, the lamination ring 12 is set to a layered design, the inner side of the lamination ring 12 is connected to a movable plate through a cavity, and the outer side of the movable plate is in contact with the edge of the lamination ring 12, which is used to follow the movement of the lamination ring 12 to change the diameter of the lamination ring 12. The cylinder 10 controls the telescopic rod 11 to move up and down while pulling the lamination ring 12 to move, and further the movable plate follows the movement of the lamination ring 12 to form a circular ring with a changeable diameter, which is convenient for adjustment according to different thickness requirements.

[0065] When the coating device for preparing invisible optical fiber based on nylon 12 is working, the nylon 12 material is first injected into the storage box 81 through the feed hopper 82, and then the driving motor 5 is started to further drive the driven gear 7 to rotate through the driving wheel 6, and then the driven gear 7 drives the rotating drum 4 to rotate, and further drives the coating box 84, the spraying pipe 85 and the nozzle 86 in the spraying mechanism 8 to rotate, and then the optical fiber enters through the feed port 2, and when passing through the dust removal mechanism 9, the connecting rod 91 follows the rotation of the rotating drum 4, and then the movable rod 92 is driven to rotate through the connecting rod 91, and further drives the dust removal brush 97 to rotate, and the dust removal brush After the dust on the outside of the optical fiber is cleaned by 97, the optical fiber passes through a drying box 99 to dry the water stains on the surface, and then the optical fiber enters the inside of the baffle 87 and is coated by the nozzle 86. During the coating process, the vacuum exhauster a2 is started to recover the exhaust gas generated by the nozzle 86 and discharge it to the inside of the sealing box a3. Then the pressure at the top of the sealing piece a4 increases, and the sealing piece a4 opens to discharge the exhaust gas to the spray pipe 85 again, and the nozzle 86 is pressurized to improve the coating effect. Then the coating is completed. When passing through the lamination ring 12, the cylinder 10 controls the movement of the telescopic rod 11 to change the diameter of the inner side of the lamination ring 12 according to the spray thickness.

[0066] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coating device for preparing invisible optical fiber based on nylon 12, comprising an outer protective shell, characterized in that: The left and right sides of the outer protective shell are respectively provided with a feed port and a discharge port, the middle part of the outer protective shell is movably connected with a rotating drum, the outer side of the outer protective shell is fixedly connected with a driving motor through a mounting plate, the output end of the driving motor is fixedly connected with a driving wheel, the driving wheel is meshingly connected with a driven tooth, the driven tooth is fixedly connected to the outer side of the rotating drum, the outer side of the outer protective shell is provided with a spraying mechanism, and the inner part of the outer protective shell is provided with a dust removal mechanism; The spraying mechanism comprises: A material storage box, the material storage box is fixedly connected to the outside of the outer protective shell; A feed hopper, the feed hopper is fixedly connected to the upper surface of the storage box; A connecting pipe, wherein the connecting pipe is movably connected to the left side of the material storage box, and the right end of the connecting pipe is arranged inside the material storage box and movably sealed to the inner side of the material storage box through a clamping plate; A coating box, the coating box is fixedly connected to the inner side of the rotating drum, and the coating box is connected to the left end of the connecting pipe; A spray pipe, one end of which is fixedly connected to the inner side of the coating box; A nozzle, the nozzle being fixedly connected to the other end of the spray pipe; A baffle, the baffle being fixedly connected to the outside of the spray pipe; An interception plate, wherein the interception plate is fixedly connected to the inner side of the baffle plate, and the inner side of the nozzle extends to the inner side of the interception plate; The nozzle assembly is arranged inside the spray pipe and is used for processing waste gas and solution vapor generated by spraying.

2. According to claim 1, a coating device for preparing invisible optical fiber based on nylon 12 is characterized in that: A cylinder is fixedly connected to the inside of the outer protective shell, an output end of the cylinder is fixedly connected to one end of a telescopic rod, the other end of the telescopic rod is fixedly connected to a lamination ring, an inner wall of the outer protective shell is fixedly connected to one end of a positioning rod, the other end of the positioning rod is movably connected to a positioning ring via a pin.

3. A coating device for preparing invisible optical fiber based on nylon 12 according to claim 2, characterized in that: The dust removal mechanism includes a connecting rod, one end of the connecting rod is fixedly connected to the inner side of the rotating drum, the other end of the connecting rod is fixedly connected to a movable rod, the outer side of the movable rod is movably connected to the inner side of a guide groove provided in the outer protective shell, the inner wall of the outer protective shell is fixedly connected to one end of a support rod, the other end of the support rod is fixedly connected to a dust removal box, the inner wall of the dust removal box is fixedly connected to a partition, the other end of the connecting rod passes through the dust removal box and extends to the inner side of the dust removal box and is fixedly connected to a dust removal brush, a liquid outlet cavity is provided in the middle part of the connecting rod, and the liquid outlet cavity is provided on the inner side of the dust removal box, and the bottom end of the liquid outlet cavity contacts with the dust removal brush, a fixed block is fixedly connected to the right side of the dust removal box, the fixed block is fixedly connected to a drying box, and a heating wire is provided on the inner side of the drying box.

4. A coating device for preparing invisible optical fiber based on nylon 12 according to claim 3, characterized in that: The nozzle assembly includes an air intake pipe, a vacuum pump, a sealing box, a sealing sheet, a return spring and a discharge hole. One end of the air intake pipe is fixedly connected to the inner side of the intercepting plate. The other end of the air intake pipe passes through the spray pipe and extends to the inner side of the spray pipe and is fixedly connected to the sealing box. The inner side of the sealing box is fixedly connected to the vacuum pump, and the air intake pipe is connected to the air inlet of the vacuum pump. The lower surface of the sealing box is movably connected to a sealing sheet via a through hole, a return spring is sleeved on the outer side of the sealing sheet, and a discharge hole is provided on the lower surface of the sealing box.

5. A coating device for preparing invisible optical fiber based on nylon 12 according to claim 4, characterized in that: The intercepting plate is configured as an annular plate, and arc bends are provided on both left and right sides of the intercepting plate, and the bending direction faces the nozzle.

6. A coating device for preparing invisible optical fiber based on nylon 12 according to claim 5, characterized in that: The top end of the sealing box is configured in a cone shape with the cone head facing the coating box.

7. The coating equipment for preparing invisible optical fiber based on nylon 12 according to claim 6 is characterized in that: The liquid outlet cavity is arranged in a Y shape, and the top end of the liquid outlet cavity is arranged on the inner side of the dust removal box and is communicated with the interior of the dust removal box.

8. The coating device for preparing invisible optical fiber based on nylon 12 according to claim 7 is characterized in that: There are four spray pipes in total, and the four spray pipes are arranged in a ring shape on the inner side of the coating box based on the central axis of the coating box.

9. A coating device for preparing invisible optical fiber based on nylon 12 according to claim 8, characterized in that: The lamination ring is configured as a layered design, the inner side of the lamination ring is connected to a movable plate through a cavity, and the outer side of the movable plate contacts the edge of the lamination ring, so as to follow the movement of the lamination ring and change the diameter of the lamination ring.

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