A cooling device for optical fiber drawing coating film seat

Abstract

The utility model relates to the technical field of optical fiber production, and specifically to a cooling device for an optical fiber drawing coating film seat. The technical problem to be solved is to overcome the defect in the prior art that the temperature rise of the film seat affects the coating, which is mainly achieved through the following technical scheme: a cooling device for an optical fiber drawing coating film seat, comprising a drawing tower and a drawing structure, and also comprising a coating structure and a cooling structure. The coating structure comprises a coating film seat and a curing device. The cooling structure is connected to the coating film seat and comprises a cooling water tank and a circulating water pipe with a filtering device. The circulating water pipe connects the cooling water tank and the coating film seat. A circulating water pump, a control console and a temperature controller are provided on the cooling water tank. A heat dissipation fan connected to the temperature controller signal control is also provided. The cooling structure is connected to the coating structure to control the temperature and cool the coating structure, so as to reduce overheating of the coating structure caused by high-speed drawing and avoid affecting the coating operation.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber production, in particular to a cooling device for an optical fiber drawing coating film seat. Background Art

[0002] In the telecommunications industry, optical cables play a vital role in network connections. The number of optical fiber cores in an optical cable determines the amount of data transmitted to the network at one time. The optical fiber structure includes the core layer, cladding layer and coating layer from the inside to the outside. The core part is the core layer and the cladding layer. It has a certain core-to-cladding ratio and refractive index distribution. The core layer has a higher refractive index and the cladding has a lower refractive index. The two together constitute a dielectric optical waveguide. The difference in refractive index will cause total internal reflection of light in the fiber core, forming the conduction and constraint of the optical signal, and realizing the transmission of light in the fiber core. Therefore, the optical fiber composed of the two is called a bare optical fiber; the coating layer is also called a coating layer, which is a polymer coating, mainly providing mechanical protection for the bare optical fiber. Because the main component of the bare optical fiber is silicon dioxide, it is a brittle and fragile material with poor bending resistance and poor toughness. In order to improve the micro-bending performance of the optical fiber, a polymer coating needs to be applied.

[0003] During the optical fiber drawing process, the drawing speed will reach more than 2000m / min. Due to the high-speed drawing, the temperature of the optical fiber coating film seat will gradually increase, and the increase in temperature will cause problems such as uneven optical fiber coating and surface defects. Therefore, the coating film seat part needs to be cooled without affecting the drawing operation. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect in the prior art that the temperature rise of the membrane seat during the drawing process affects the coating, thereby providing a membrane seat cooling device for optical fiber drawing coating.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A fiber optic drawing coating film seat cooling device comprises a drawing tower and a drawing structure, wherein the drawing structure is arranged at the top of the drawing tower, and further comprises a coating structure and a cooling structure, wherein the coating structure is arranged in the drawing tower and below the drawing structure, wherein the coating structure comprises a coating film seat and a curing device, wherein a coating hole for the optical fiber to pass through is arranged in the middle of the coating film seat, wherein the curing device is annular and is arranged below the coating film seat, wherein the cooling structure is connected to the coating film seat and comprises a cooling water tank and a circulating water pipe, wherein the circulating water pipe connects the cooling water tank and the coating film seat, and wherein the cooling water tank is arranged outside the drawing tower.

[0007] By adopting the above technical solution, a cooling structure is connected to the coating structure to control the temperature of the coating structure and cool it, thereby reducing overheating of the coating structure caused by high-speed wire drawing and avoiding affecting the coating operation; the circulating water pipe transports the cooling water in the cooling water tank to the coating film seat, which can enable the optical fiber in high-speed wire drawing to maintain a stable surface temperature before coating, and the optical fiber coating is more uniform to improve the coating quality of the optical fiber. The cooling water cools and takes away the heat and returns to the cooling water tank. The water in the cooling water tank controls the water temperature through a cooling fan and a temperature sensor to avoid cooling failure caused by excessively high water temperature, and also to avoid rapid cooling at this location caused by excessively low water temperature and affecting coating.

[0008] Furthermore, the coating film seat includes a film seat body, a first coating die and a second coating die, the first coating die and the second coating die are arranged in the film seat body and coaxially with the film seat body, the film seat body is provided with a mold cavity whose diameter decreases from top to bottom, the first coating die and the second coating die are both clamped in the mold cavity and the first coating die is arranged above the second coating die, the first coating die and the second coating die are both in the shape of a truncated cone whose diameter decreases from top to bottom, and the bottom diameter of the first coating film is equal to the top diameter of the second coating die.

[0009] By adopting the above technical solution, two first coating dies and a second coating dies are arranged to be clamped in the membrane seat body to achieve double coating, ensuring uniform coating without affecting optical fiber transmission.

[0010] Furthermore, a conical first coating cavity is provided in the first coating mold, and a conical second coating cavity is provided in the second coating mold. The first coating cavity and the second coating cavity are both in a shape in which the diameter decreases from top to bottom. A first coating inlet is provided on the membrane seat body corresponding to the first coating cavity, and a second coating inlet is also provided on the membrane seat body corresponding to the second coating cavity. A first coating outlet is provided on one side of the bottom of the first coating cavity, and the first coating outlet is connected to the first coating inlet. A second coating outlet is provided on one side of the bottom of the second coating cavity, and the second coating outlet is connected to the second coating inlet.

[0011] By adopting the above technical solution, the first coating chamber cooperates with the first coating inlet to realize a primary coating operation, and the second coating chamber cooperates with the second coating inlet to realize a secondary coating operation. The outer layer of the optical fiber is extruded and coated through two coatings, and the coating amount is small each time, ensuring product quality and uniform coating.

[0012] Furthermore, a water inlet and a water outlet are provided on the membrane seat body, and the water inlet and the water outlet are connected to the cooling water tank through a circulating water pipe. The water inlet is arranged above one side of the membrane seat body, and the water outlet is arranged below the other side of the membrane seat body. A heat dissipation cavity with two ends connected to the water inlet and the water outlet is also provided in the membrane seat body, and the heat dissipation cavity is spirally arranged in the membrane seat body.

[0013] By adopting the above technical solution, the paint pipeline and the cooling pipeline are separately set up and are not connected and do not affect each other. The circulating water pipe connects the water inlet and the water outlet to the cooling water tank. The cooling water enters from the water inlet and passes through the heat dissipation cavity around the membrane seat body and then returns to the cooling water tank through the water outlet, ensuring comprehensive cooling of the membrane seat body and ensuring the temperature control effect.

[0014] Furthermore, a filtering device is also provided on the circulating water pipe between the water inlet and the cooling water tank. The filtering device includes a filter and a filter element. The filter element is cylindrical and is clamped in the filter.

[0015] By adopting the above technical solution, the filtering device can filter particles or impurities in the water to ensure that the heat dissipation cavity of the membrane seat body will not be blocked. When the cooling effect is reduced after multiple uses, the filter element can be cleaned and replaced to ensure cooling efficiency and increase the service life of the filter.

[0016] Furthermore, a circulating water pump connected to a circulating water pipe is arranged inside the cooling water tank, and a control console connected to a signal control of the circulating water pump is arranged outside the cooling water tank.

[0017] By adopting the above technical solution, the circulating water pump is connected with the control console signal control to control the circulation of cooling water, thereby achieving the purpose of cooling the membrane seat body.

[0018] Furthermore, a temperature sensor is provided in the cooling water tank, and the temperature sensor is connected to the control console signal control. A temperature controller is also provided on the control console, and the temperature controller is connected to the temperature sensor signal control.

[0019] Furthermore, a heat dissipation fan with a vertical axis is arranged on the top of the cooling water tank, and the heat dissipation fan is fixed to the top of the cooling water tank by hexagonal bolts, and the heat dissipation fan is connected to the temperature controller signal control.

[0020] By adopting the above technical solution, a cooling fan is installed on the cooling water tank, and the temperature of the water inside the cooling water tank is controlled by the circulation of air. The thermostat sets the upper and lower limits of the temperature and is connected with the cooling fan signal control. When the temperature sensor detects that the temperature reaches the set upper limit, the cooling fan is automatically started by the thermostat to perform air cooling and heat dissipation operations, so that the water temperature begins to slowly drop; when the temperature sensor detects that the water temperature reaches the set lower limit, the cooling fan is controlled by the thermostat to stop running, so that the water control temperature in the cooling water tank is within a reasonable range.

[0021] In summary, the technical solution of the utility model has the following advantages:

[0022] 1. The optical fiber drawing coating film seat cooling device provided by the utility model connects a cooling structure at the coating structure to control the temperature of the coating structure, thereby reducing overheating of the coating structure caused by high-speed drawing and avoiding affecting the coating operation.

[0023] 2. The utility model provides a cooling device for the optical fiber drawing coating membrane seat. The circulating water pipe transports the cooling water in the cooling water tank to the coating membrane seat, which can maintain a stable surface temperature of the optical fiber in high-speed drawing before coating. The optical fiber coating is more uniform to improve the coating quality of the optical fiber. The cooling water cools and takes away the heat back to the cooling water tank. The water temperature in the cooling water tank is controlled by a cooling fan and a temperature sensor to avoid cooling failure caused by excessively high water temperature, and also to avoid rapid cooling at that place caused by excessively low water temperature and affecting coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of a cooling device for an optical fiber drawing coating film seat provided in one embodiment of the utility model;

[0026] Figure 2 A schematic cross-sectional view of a cooling device for an optical fiber drawing coating film seat provided in one embodiment of the utility model;

[0027] Figure 3 A schematic cross-sectional view of a coating film seat provided in one embodiment of the utility model;

[0028] Figure 4 It is a schematic diagram of the local structure of a cooling structure provided in one embodiment of the utility model.

[0029] Description of reference numerals:

[0030] 1. Drawing tower; 2. Drawing structure; 3. Coating structure; 4. Coating membrane seat; 41. Coating hole; 42. Membrane seat body; 421. Mold cavity; 422. First coating inlet; 423. Second coating inlet; 424. Water inlet; 425. Water outlet; 426. Heat dissipation cavity; 43. First coating mold; 431. First coating cavity; 4311. First coating outlet; 44. Second coating mold; 441. Second coating cavity; 4411. Second coating outlet; 5. Curing device; 6. Cooling structure; 7. Cooling water tank; 71. Circulating water pump; 72. Temperature sensor; 73. Control console; 74. Thermostat; 75. Cooling fan; 8. Circulating water pipe; 9. Filter device; 91. Filter; 92. Filter element. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] A cooling device for a fiber drawing coating film seat, such as Figure 1 and Figure 2 As shown, it includes a drawing tower 1 and a drawing structure 2, the drawing structure 2 is arranged at the top of the drawing tower 1, and also includes a coating structure 3 and a cooling structure 6. The coating structure 3 is arranged in the drawing tower 1 and is located below the drawing structure 2. The coating structure 3 includes a coating film seat 4 and a curing device 5. A coating hole 41 for the optical fiber to pass through is arranged in the middle of the coating film seat 4. The curing device 5 is annular and is arranged below the coating film seat 4. The cooling structure 6 is connected to the coating film seat 4 and includes a cooling water tank 7 and a circulating water pipe 8. The circulating water pipe 8 connects the cooling water tank 7 and the coating film seat 4. The cooling water tank 7 is arranged outside the drawing tower 1. A cooling structure 6 is connected to the coating structure 3 to control the temperature of the coating structure 3 and reduce overheating of the coating structure 3 caused by high-speed drawing to avoid affecting the coating operation; the circulating water pipe 8 transports the cooling water in the cooling water tank 7 to the coating film seat 4, which can enable the optical fiber to maintain a stable surface temperature before coating in high-speed drawing, and the optical fiber coating is more uniform to improve the coating quality of the optical fiber. The cooling water cools and takes away the heat and returns to the cooling water tank 7. The water in the cooling water tank 7 is controlled by the heat dissipation fan 75 and the temperature sensor 72 to avoid cooling failure caused by excessively high water temperature, and also to avoid rapid cooling at this location caused by too low water temperature and affecting coating.

[0033] like Figure 1 , Figure 2 and Figure 3As shown, the coating film seat 4 includes a film seat body 42, a first coating die 43 and a second coating die 44. The first coating die 43 and the second coating die 44 are arranged in the film seat body 42 and are arranged coaxially with the film seat body 42. A mold cavity 421 with a diameter decreasing from top to bottom is opened in the film seat body 42. The first coating die 43 and the second coating die 44 are both clamped and arranged in the mold cavity 421, and the first coating die 43 is arranged above the second coating die 44. The first coating die 43 and the second coating die 44 are both truncated and the diameter decreases from top to bottom. The bottom diameter of the first coating film is equal to the top diameter of the second coating die 44. Two first coating dies 43 and the second coating die 44 are clamped in the film seat body 42 to achieve two coatings to ensure uniform coating and not affect optical fiber transmission.

[0034] A first coating cavity 431 in the shape of an inverted cone is provided in the first coating die 43, and a second coating cavity 441 in the shape of an inverted cone is provided in the second coating die 44. The first coating cavity 431 and the second coating cavity 441 are both shaped in a shape with diameters decreasing from top to bottom. A first coating inlet 422 is provided on the membrane seat body 42 corresponding to the first coating cavity 431, and a second coating inlet 423 is also provided on the membrane seat body 42 corresponding to the second coating cavity 441. A first coating outlet 4311 is provided on the left side of the bottom of the first coating cavity 431, and the first coating outlet 4311 is communicated with the first coating inlet 422. A second coating outlet 4411 is provided on the right side of the bottom of the second coating cavity 441, and the second coating outlet 4411 is communicated with the second coating inlet 423. The first coating inlet 422 is provided on the upper left side of the membrane seat body 42, and the second coating inlet 423 is provided on the lower right side of the membrane seat body 42. The first coating chamber 431 cooperates with the first coating inlet 422 to realize a primary coating operation, and the second coating chamber 441 cooperates with the second coating inlet 423 to realize a secondary coating operation. The first coating inlet 422 and the second coating inlet 423 are connected to a coating bucket (not shown in the figure). The outer layer of the optical fiber is extruded and coated through two coatings. The coating amount is small each time, which ensures product quality and uniform coating.

[0035] like Figure 2 and Figure 3As shown, a water inlet 424 and a water outlet 425 are also provided on the membrane seat body 42, and the water inlet 424 and the water outlet 425 are both connected to the cooling water tank 7 through the circulating water pipe 8. The water inlet 424 is arranged on the upper left side of the membrane seat body 42 and above the first paint inlet 422, and the water outlet 425 is arranged on the lower right side of the membrane seat body 42 and above the second paint inlet 423. A heat dissipation cavity 426 whose two ends are connected to the water inlet 424 and the water outlet 425 is also provided in the membrane seat body 42, and the heat dissipation cavity 426 is spirally arranged in the membrane seat body 42. The paint pipeline and the cooling pipeline are separately arranged and are not connected and do not affect each other. The circulating water pipe 8 connects the water inlet 424 and the water outlet 425 to the cooling water tank 7. The cooling water enters from the water inlet 424 and passes through the heat dissipation cavity 426 around the membrane seat body 42 and then returns to the cooling water tank 7 through the water outlet 425, ensuring comprehensive cooling of the membrane seat body 42 and ensuring the temperature control effect.

[0036] like Figure 1 , Figure 2 and Figure 4 As shown, a circulating water pump 71 whose two ends are connected to the circulating water pipe 8 is arranged inside the cooling water tank 7, and a control console 73 connected to the circulating water pump 71 by signal control is arranged outside the cooling water tank 7. The signal control connection between the circulating water pump 71 and the control console 73 can control the circulation of cooling water, thereby achieving the purpose of cooling the membrane seat body 42.

[0037] A temperature sensor 72 is also provided in the cooling water tank 7, and a thermostat 74 is also provided on the control console 73, and the thermostat 74 is connected to the temperature sensor 72 by signal control. The temperature sensor 72 is connected to the control console 73 by signal control. The temperature sensor 72 is a thermocouple temperature sensor device that can monitor the cooling water temperature in real time and feedback the signal to the thermostat 74. The thermostat 74 sets the upper and lower limit control values ​​through the buttons on the control console 73. The power supply of the thermostat 74 adopts a voltage of AC220V, 50HZ, and the accuracy is temperature ±0.5℃. A cooling fan 75 with a vertical axis is provided on the top of the cooling water tank 7. The cooling fan 75 is fixed to the top of the cooling water tank 7 by hexagonal bolts, and the cooling fan 75 is connected to the thermostat 74 by signal control. A heat dissipation fan 75 is installed on the cooling water tank 7, and the temperature of the water inside the cooling water tank 7 is controlled by the circulation of air. The thermostat 74 sets the upper and lower limits of the temperature and is connected to the heat dissipation fan 75 signal control. When the temperature sensor 72 detects that the temperature reaches the set upper limit, the heat dissipation fan 75 is automatically started by the thermostat 74 to perform air cooling and heat dissipation operations, so that the water temperature begins to slowly drop; when the temperature sensor 72 detects that the water temperature reaches the set lower limit, the heat dissipation fan 75 is controlled by the thermostat 74 to stop running, so that the water control temperature in the cooling water tank 7 is within a reasonable range.

[0038] like Figure 2 and Figure 4As shown, a filter device 9 is also provided on the circulating water pipe 8 between the water inlet 424 and the cooling water tank 7. The filter device 9 includes a filter 91 and a filter element 92. The filter element 92 is cylindrical and is clamped in the filter 91. The filter 91 is Y-shaped. The filter device 9 can filter particles or impurities in the water to ensure that the heat dissipation cavity 426 of the membrane seat body 42 will not be blocked. When the cooling effect is reduced after multiple uses, the filter element 92 can be cleaned and replaced to ensure the cooling efficiency and increase the service life of the filter 91.

[0039] The working principle and use method of the fiber optic drawing coating membrane seat cooling device: during the fiber optic drawing operation, the cooling structure 6 is started, the upper and lower temperature limits of the thermostat 74 are pre-set, and then the circulating water pump 71 is started and the water temperature in the cooling water tank 7 is detected by the temperature sensor 72; when the temperature sensor 72 detects that the temperature reaches the set upper limit, the heat dissipation fan 75 is automatically started by the thermostat 74 to perform air cooling and heat dissipation operations, so that the water temperature begins to slowly drop, and the cooling water with a dropped temperature is transported into the membrane seat body 42 to cool the membrane seat body 42 in coating operation; when the temperature sensor 72 detects that the water temperature reaches the set lower limit, the heat dissipation fan 75 is controlled by the thermostat 74 to stop running, so that the water control temperature in the cooling water tank 7 is within a reasonable range.

[0040] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A cooling device for an optical fiber drawing coating film seat, comprising a drawing tower (1) and a drawing structure (2), wherein the drawing structure (2) is arranged at the top of the drawing tower (1), and is characterized in that: It also includes a coating structure (3) and a cooling structure (6), wherein the coating structure (3) is arranged in the drawing tower (1) and is located below the drawing structure (2), wherein the coating structure (3) includes a coating film seat (4) and a curing device (5), wherein a coating hole (41) for the optical fiber to pass through is arranged in the middle of the coating film seat (4), wherein the curing device (5) is annular and is arranged below the coating film seat (4), wherein the cooling structure (6) is connected to the coating film seat (4) and includes a cooling water tank (7) and a circulating water pipe (8), wherein the circulating water pipe (8) connects the cooling water tank (7) and the coating film seat (4), and wherein the cooling water tank (7) is arranged outside the drawing tower (1).

2. The optical fiber drawing coating film seat cooling device according to claim 1, characterized in that: The coating film seat (4) comprises a film seat body (42), a first coating die (43) and a second coating die (44); the first coating die (43) and the second coating die (44) are arranged in the film seat body (42) and are arranged coaxially with the film seat body (42); a mold cavity (421) whose diameter decreases from top to bottom is opened in the film seat body (42); the first coating die (43) and the second coating die (44) are both clamped in the mold cavity (421) and the first coating die (43) is arranged above the second coating die (44); the first coating die (43) and the second coating die (44) are both in the shape of a truncated cone with a diameter decreasing from top to bottom; the bottom diameter of the first coating die (43) is equal to the top diameter of the second coating die (44).

3. The optical fiber drawing coating film seat cooling device according to claim 2, characterized in that: A conical first coating cavity (431) is provided in the first coating die (43), and a conical second coating cavity (441) is provided in the second coating die (44); the first coating cavity (431) and the second coating cavity (441) are both shaped in such a way that their diameters decrease from top to bottom; a first coating inlet (422) is provided on the membrane seat body (42) corresponding to the first coating cavity (431); a second coating inlet (423) is also provided on the membrane seat body (42) corresponding to the second coating cavity (441); a first coating outlet (4311) is provided on one side of the bottom of the first coating cavity (431), and the first coating outlet (4311) is connected to the first coating inlet (422); a second coating outlet (4411) is provided on one side of the bottom of the second coating cavity (441), and the second coating outlet (4411) is connected to the second coating inlet (423).

4. The optical fiber drawing coating film seat cooling device according to claim 3, characterized in that: The membrane seat body (42) is also provided with a water inlet (424) and a water outlet (425), and the water inlet (424) and the water outlet (425) are connected to the cooling water tank (7) through a circulating water pipe (8), the water inlet (424) is arranged above one side of the membrane seat body (42), and the water outlet (425) is arranged below the other side of the membrane seat body (42), and the membrane seat body (42) is also provided with a heat dissipation cavity (426) whose two ends are connected to the water inlet (424) and the water outlet (425), and the heat dissipation cavity (426) is arranged in a spiral shape in the membrane seat body (42).

5. The optical fiber drawing coating film seat cooling device according to claim 4, characterized in that: A filtering device (9) is also provided on the circulating water pipe (8) between the water inlet (424) and the cooling water tank (7); the filtering device (9) comprises a filter (91) and a filter element (92); the filter element (92) is cylindrical and is clamped in the filter (91).

6. The optical fiber drawing coating film seat cooling device according to claim 5, characterized in that: A circulating water pump (71) in communication with the circulating water pipe (8) is arranged inside the cooling water tank (7), and a control console (73) connected to the circulating water pump (71) for signal control is arranged outside the cooling water tank (7).

7. The optical fiber drawing coating film seat cooling device according to claim 6, characterized in that: A temperature sensor (72) is also provided in the cooling water tank (7), and the temperature sensor (72) is connected to a control console (73) by signal control. A temperature controller (74) is also provided on the control console (73), and the temperature controller (74) is connected to the temperature sensor (72) by signal control.

8. The optical fiber drawing coating film seat cooling device according to claim 7, characterized in that: A heat dissipation fan (75) with a vertical axis is arranged on the top of the cooling water tank (7). The heat dissipation fan (75) is fixed to the top of the cooling water tank (7) by means of hexagonal bolts. The heat dissipation fan (75) is connected to the temperature controller (74) by signal control.

Images