Coating constant-temperature feeding system for optical fiber manufacturing

Abstract

The invention discloses a coating constant-temperature feeding system for optical fiber manufacturing, which is used for removing bubbles of a coating before use, uniformizing the density of the coating and keeping the coating in a set temperature interval for feeding operation, so that the quality of optical fibers is improved. The device comprises a drying oven, a material placing table is arranged in the drying oven, and the surface area of the material placing table covers at least two coating barrels; a diaphragm pump; the temperature control mechanism comprises a heating device, a temperature sensor, a ventilation device and a temperature control module, and a PLC module is arranged in the temperature control module; the feeding mechanism comprises a main pipeline and a plurality of branch pipelines, the bottom of the drying oven is provided with a plurality of branch pipelines, the feeding end of each branch pipeline is connected with an outlet of the corresponding coating barrel after being provided with a valve, the main pipeline is independently connected to the discharging end of each branch pipeline through a branching device, a temperature sensor is integrated in the main pipeline, and the temperature sensor is connected with the temperature sensor. And the temperature sensor is used for monitoring the temperature of the output coating.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber production, in particular to a constant temperature feeding system for coatings used in optical fiber production. Background Art

[0002] During the optical fiber drawing process, the optical fiber is particularly fragile and needs to be wrapped with a coating to enhance its physical properties. Currently, the industry mainly uses a central feeding method to feed all lines. A diaphragm pump is used to extract the paint from a paint bucket weighing one ton, and then the paint is pressed into the small paint cans of each line through the main pipeline.

[0003] Since a large number of bubbles will be generated inside the coating after it is transported to the optical fiber factory, the coating needs to be baked at high temperature before it is put into use, so that the bubbles in the coating can be quickly eliminated and the coating can be mixed evenly to prevent stratification caused by long-term storage. In addition, the viscosity of the coating is different under different temperature conditions. The lower the temperature, the higher the viscosity. On the one hand, the high-viscosity coating has greater flow resistance, which will reduce the feeding speed. On the other hand, if the viscosity of the coating is too high, it will be easier to generate bubbles during the drawing process, affecting the quality of the optical fiber coating. Therefore, how to heat and keep the coating warm is a key point to improve the quality of optical fiber. Summary of the invention

[0004] In response to the above problems, the present invention provides a constant temperature feeding system for coatings used in optical fiber manufacturing, which removes bubbles in the coating before use, makes the density of the coating uniform, and keeps the coating in a set temperature range for feeding operations, thereby improving the quality of the optical fiber.

[0005] A constant temperature feeding system for coatings used in optical fiber manufacturing, characterized in that it comprises:

[0006] The oven has a material placement table disposed therein, and the surface area of ​​the material placement table covers at least two paint buckets;

[0007] Diaphragm pumps;

[0008] A temperature control mechanism, which includes a heating device, a temperature sensor, a ventilation device, and a temperature control module, wherein the temperature control module has a built-in PLC module;

[0009] and a feeding mechanism, which includes a main pipeline and several branch pipelines,

[0010] A plurality of component pipelines are arranged at the bottom of the oven, and a valve is installed at the feed end of each component pipeline and connected to the outlet of the corresponding paint bucket. The main pipeline is independently connected to the discharge end of each component pipeline through a splitter. A temperature sensor is integrated in the main pipeline, and the temperature sensor is used to monitor the temperature of the output paint. The temperature sensor is connected to the monitoring end of the temperature control module, and the temperature control module is connected to the heating device and the ventilation device. The diaphragm pump is arranged at the outlet end of the main pipeline.

[0011] It is further characterized by:

[0012] The surface area of ​​the material placement table covers two paint buckets, and the two paint buckets are arranged along the length of the material placement table in the working state. A side flip door is provided on one side of each material placement table corresponding to the position of the paint bucket. When the paint bucket at the corresponding position needs to be replaced, the corresponding side flip door is opened to quickly replace the paint bucket.

[0013] The main pipeline is connected to the two branch pipelines through a tee, and the two paint buckets are independently connected to the corresponding branch pipelines and are provided with corresponding valves;

[0014] The branch pipeline is arranged along the back side of the material placement table toward the diaphragm pump at the other side, ensuring a reasonable and reliable arrangement of the entire mechanism;

[0015] The inner wall of the oven is provided with a heat insulation layer, which is specifically ceramic fiber, to keep the oven warm and prevent the oven shell from being overheated;

[0016] The heating device includes an electric heating tube and a circulating fan, and the heated air passes through the circulating fan to heat the air in the oven;

[0017] The ventilation device is a vacuum pump, which draws high-temperature air out of the oven to cool it down;

[0018] The temperature control module is pre-set with a monitoring temperature range value fed back by the temperature sensor. When the temperature value fed back by the temperature sensor is higher than the maximum range value, the temperature control module controls the heating device to suspend heating and the ventilation device to discharge part of the hot air in the oven until the temperature fed back by the temperature sensor is lower than the maximum range value and is within the interval of the monitoring temperature range value, after which the ventilation device is closed and the entire oven is in a heat preservation state. When the temperature value fed back by the temperature sensor is lower than the minimum range value, the temperature control module controls the heating device to start heating until the temperature fed back by the temperature sensor is equal to the maximum range value, the heating device suspends heating, and the entire oven is in a heat preservation state;

[0019] The temperature sensor for monitoring the temperature is installed in the main pipeline to ensure that the temperature value of the paint transported through the main pipeline is accurate and reliable;

[0020] A temperature alarm is also provided inside the oven and is connected to the temperature control module. When the temperature alarm sounds an alarm, the temperature control module controls the heating device to suspend heating and the ventilation device to partially discharge the hot air in the oven until the temperature alarm stops the alarm.

[0021] After adopting the present invention, a plurality of paint buckets can be placed on the storage table at the same time. The paint buckets filled with paint are placed in an oven in advance, baked and heated in advance to remove bubbles, and then the valve of one of the paint buckets is opened to ensure that the paint has a temperature corresponding to the outlet position of the main material pipe, and then the material is fed. At least one paint bucket is baked and heated in advance to remove bubbles and to make the paint density uniform as a backup; at least one paint bucket maintains a constant temperature and produces and feeds normally; the switching of the paint supply source is performed by closing or opening the exposed valve of the corresponding paint bucket, and the operation is convenient; the paint bubbles are removed and the density of the paint is uniform before use, and the paint is kept in a set temperature range for feeding operations, thereby improving the quality of the optical fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a simplified three-dimensional schematic diagram of the present invention (with the upper cover of the oven removed);

[0023] Figure 2 It is a schematic bottom view structure diagram of the present invention;

[0024] The names corresponding to the serial numbers in the figure are as follows:

[0025] Oven 1, side flip door 101, paint bucket 2, temperature control module 3, material placement table 4, diaphragm pump 5, main pipeline 6, temperature sensor 7, vacuum pump 8, exhaust duct 9, branch pipeline 10, tee 11, valve 12 and temperature alarm 13. DETAILED DESCRIPTION

[0026] A constant temperature feeding system for coatings used in optical fiber production, see Figure 1 , Figure 2 , which includes an oven 1, a diaphragm pump 5, a temperature control mechanism, and a feeding mechanism;

[0027] In a specific embodiment, a material placement table 4 is provided inside the oven 1, and the surface length direction of the material placement table 4 can prevent two paint buckets 2, each paint bucket 2 is specifically a ton bucket for placing one ton of paint; the temperature control mechanism includes a heating device, a temperature sensor 7, a ventilation device, and a temperature control module 3, and the temperature control module has a built-in PLC module;

[0028] The feeding mechanism includes a main pipeline 6, a tee 11, and two-component pipelines 10. In specific implementation, the main pipeline 6 and the two-component pipelines 10 are both metal pipelines;

[0029] Two component pipes 10 are embedded on the bottom surface of the back plate of the oven 1. A valve 12 is installed at the feed end of each component pipe 10 and connected to the outlet of the corresponding paint bucket 2. The main pipe 6 is independently connected to the discharge end of each component pipe 10 through a tee 11. A temperature sensor 7 is integrated in the main pipe 6. The temperature sensor 7 is used to monitor the temperature of the output paint. The temperature sensor 7 is connected to the monitoring end of the temperature control module. The temperature control module is connected to the heating device and the ventilation device. A diaphragm pump 5 is provided at the outlet end of the main pipe 6.

[0030] In the specific implementation, the two paint buckets 2 are arranged along the length of the material placement table 4 in the working state, and a side flip door 101 is provided on one side of each material placement table 4 corresponding to the position of the paint bucket 2. When the paint bucket 2 at the corresponding position needs to be replaced, the corresponding side flip door 101 is opened to quickly replace the paint bucket;

[0031] The branch pipe 10 is arranged along the back side of the material placing table 4 toward the diaphragm pump 5 at the other side, ensuring a reasonable and reliable arrangement of the entire mechanism;

[0032] The inner wall of the oven 1 is provided with a heat insulation layer, which is specifically ceramic fiber, to keep the oven warm and prevent the shell temperature of the oven 1 from being too high;

[0033] The heating device includes an electric heating tube and a circulating fan. The heated air passes through the circulating fan to heat the air in the oven.

[0034] The ventilation device is a vacuum pump 8 and an exhaust duct 9. The vacuum pump 8 draws the high-temperature air in the oven 1 out of the oven and discharges it through the exhaust duct 9 to cool it down.

[0035] The temperature control module 3 is pre-set with the monitoring temperature range value fed back by the temperature sensor. When the temperature value fed back by the temperature sensor 7 is higher than the maximum range value, the temperature control module controls the heating device to suspend heating and the ventilation device to discharge part of the hot air in the oven until the temperature fed back by the temperature sensor 7 is lower than the maximum range value and is within the interval of the monitoring temperature range value. After that, the ventilation device is closed and the entire oven is in a heat preservation state. When the temperature value fed back by the temperature sensor 7 is lower than the minimum range value, the temperature control module 3 controls the heating device to start heating until the temperature fed back by the temperature sensor 7 is equal to the maximum range value. The heating device suspends heating and the entire oven is in a heat preservation state.

[0036] The temperature sensor for monitoring the temperature is arranged in the main pipeline to ensure that the temperature value of the coating material transported through the main pipeline is accurate and reliable.

[0037] In specific implementation, a temperature alarm 13 is also provided inside the oven 1, and the temperature alarm 13 is connected to the temperature control module 3. When the temperature alarm 7 sounds an alarm, the temperature control module 3 controls the heating device to suspend heating and the ventilation device to discharge part of the hot air in the oven 1 until the temperature alarm 13 stops the alarm.

[0038] The working principle of the specific embodiment is as follows: the storage table 4 can hold two paint buckets 2 at the same time. The two paint buckets 2 filled with paint are placed in the oven 1 in advance, and the oven is closed. They are baked and heated in advance to remove bubbles. After the baking time is reached, it is ensured that any paint bucket 2 reaches a reasonable feeding temperature. Then, the valve 12 of one of the paint buckets 2 is opened to ensure that the paint has a temperature corresponding to the outlet position of the main pipeline, and then the feeding is carried out. During the entire feeding process, one paint bucket 2 is baked and heated in advance to remove bubbles, and the paint density is uniform as a backup; one paint bucket 2 maintains a constant temperature and produces and feeds normally; the switching of the paint supply source is performed by closing or opening the exposed valve 12 of the corresponding paint bucket 2, and the operation is convenient; before use, the heating device of the oven 1 is used to remove bubbles in the paint and to make the density of the paint uniform, and the ventilation device is used to keep the paint in the set temperature range for feeding operations, thereby improving the quality of the optical fiber.

[0039] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A constant temperature feeding system for coatings used in optical fiber manufacturing, characterized in that: It includes: The oven has a material placement table disposed therein, and the surface area of ​​the material placement table covers at least two paint buckets; Diaphragm pumps; A temperature control mechanism, which includes a heating device, a temperature sensor, a ventilation device, and a temperature control module, wherein the temperature control module has a built-in PLC module; and a feeding mechanism, which includes a main pipeline and several branch pipelines, A plurality of component pipelines are arranged at the bottom of the oven, and a valve is installed at the feed end of each component pipeline and connected to the outlet of the corresponding paint bucket. The main pipeline is independently connected to the discharge end of each component pipeline through a splitter. A temperature sensor is integrated in the main pipeline, and the temperature sensor is used to monitor the temperature of the output paint. The temperature sensor is connected to the monitoring end of the temperature control module, and the temperature control module is connected to the heating device and the ventilation device. The diaphragm pump is arranged at the outlet end of the main pipeline.

2. A constant temperature feeding system for coatings used in optical fiber manufacturing according to claim 1, characterized in that: The surface area of ​​the material placement table covers two paint buckets, and in the working state, the two paint buckets are arranged along the length space of the material placement table. A side flip door is provided on one side of each material placement table corresponding to the position of the paint bucket. When the paint bucket at the corresponding position needs to be replaced, the corresponding side flip door is opened to replace the paint bucket.

3. A constant temperature feeding system for coatings used in optical fiber manufacturing according to claim 2, characterized in that: The main pipeline is connected to the two branch pipelines through a tee, and the two paint buckets are independently connected to the corresponding branch pipelines and are provided with corresponding valves.

4. A constant temperature feeding system for coatings used in optical fiber manufacturing according to claim 1, characterized in that: The branch pipeline is arranged along the back side of the material placing table toward the diaphragm pump at the other side.

5. A constant temperature feeding system for coatings used in optical fiber manufacturing according to claim 1, characterized in that: The inner wall of the oven is provided with a heat insulation layer, which is specifically ceramic fiber, to keep the oven warm and prevent the oven shell from being overheated.

6. A constant temperature feeding system for coatings used in optical fiber manufacturing according to claim 1, characterized in that: The heating device comprises an electric heating tube and a circulating fan, and the heated air passes through the circulating fan to heat the air in the oven.

7. A constant temperature feeding system for coatings used in optical fiber manufacturing according to claim 1, characterized in that: The ventilation device is a vacuum pump, which draws high-temperature air out of the oven to cool it down.

8. A constant temperature feeding system for coatings used in optical fiber manufacturing according to claim 1, characterized in that: The inner wall of the oven is provided with a heat insulation layer, which is specifically ceramic fiber, to keep the oven warm and prevent the oven shell from being overheated.

9. A constant temperature feeding system for coating material for optical fiber manufacturing according to claim 1, characterized in that: The temperature control module is pre-set with a monitoring temperature range value fed back by the temperature sensor. When the temperature value fed back by the temperature sensor is higher than the maximum range value, the temperature control module controls the heating device to suspend heating and the ventilation device to discharge part of the hot air in the oven until the temperature fed back by the temperature sensor is lower than the maximum range value and is within the interval of the monitoring temperature range value. After that, the ventilation device is closed and the entire oven is in a heat preservation state. When the temperature value fed back by the temperature sensor is lower than the minimum range value, the temperature control module controls the heating device to start heating until the temperature fed back by the temperature sensor is equal to the maximum range value. The heating device suspends heating and the entire oven is in a heat preservation state.

10. A constant temperature feeding system for coatings used in optical fiber manufacturing according to claim 1, characterized in that: A temperature alarm is also provided inside the oven and is connected to the temperature control module. When the temperature alarm sounds an alarm, the temperature control module controls the heating device to suspend heating and the ventilation device to partially discharge the hot air in the oven until the temperature alarm stops the alarm.

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