Online recovery method and device for coating in optical fiber coating cup

Abstract

The invention discloses an on-line recovery method for a coating in an optical fiber coating cup, which is characterized in that when an optical fiber stops flowing into the optical fiber coating cup, the coating remaining in a conveying pipeline and the optical fiber coating cup is reliably collected, and the safety of equipment components below the optical fiber coating cup is ensured. The coating recovery control system is preset and connected with the optical fiber drawing control system, when the real-time state in the optical fiber drawing control system is a drawing stopping or tower breaking state, the coating recovery control system conducts pneumatic coating recovery operation, and under the coating recovery operation state, the optical fiber drawing control system conducts drawing stopping or tower breaking. A feeding valve for feeding paint to the optical fiber coating cup through a paint pipeline is closed, meanwhile, a paint recovery valve arranged on the paint pipeline in a bypass mode is opened, a bypass pipeline corresponding to the paint recovery valve is communicated with a paint storage container, and the paint storage container is a container receiving end of a negative pressure recovery system; and the negative pressure recovery system is in a negative pressure starting state in a coating recovery operation state.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber production, and in particular to an online recovery method for coating in an optical fiber coating cup. The invention also provides an online recovery device for coating in an optical fiber coating cup. Background Art

[0002] The optical fiber currently used is mainly quartz glass optical fiber, which is thin, brittle, and easy to break. Environmental factors also affect the quality of signal transmission. Therefore, after the optical fiber is drawn, one or more layers of optical fiber coating must be applied to its surface for protection. The most commonly used optical fiber coating is the acrylate free radical polymerization system, which mainly consists of acrylate prepolymers, active monomers, photoinitiators and other additives. The ingredients contained in the optical fiber coating have an important impact on the optical fiber drawing equipment and drawing environment.

[0003] However, when the optical fiber tower breaks suddenly or production is stopped artificially during the production process, the excess coating in the optical fiber coating cup will flow downward due to gravity to other equipment components on the drawing tower, such as UV curing lamps, optical fiber online detectors, polarization mode optimization devices, and optical fiber take-up systems, causing equipment damage and contamination of the optical fiber drawing channel, affecting the optical fiber production quality and manufacturing efficiency. Summary of the invention

[0004] In response to the above problems, the present invention provides an online recovery method for the coating in the optical fiber coating cup, wherein when the optical fiber stops flowing into the optical fiber coating cup, the coating remaining in the delivery pipe and the optical fiber coating cup is reliably collected, thereby ensuring the safety of the equipment components located below the optical fiber coating cup.

[0005] An online recovery method for coating in an optical fiber coating cup, characterized in that: a coating recovery control system is preset, the coating recovery control system is connected to the optical fiber drawing control system, when the real-time state in the optical fiber drawing control system is drawing stop or tower break state, the coating recovery control system pneumatically recovers the coating, in the coating recovery operation state, closes the feed valve that feeds the coating to the optical fiber coating cup through the coating pipeline, and opens the coating recovery valve provided on the coating pipeline as a bypass, the bypass pipeline corresponding to the coating recovery valve leads to a coating storage container, the coating storage container is the container receiving end of a negative pressure recovery system, and the negative pressure recovery system is in a negative pressure open state in the coating recovery operation state.

[0006] It is further characterized by:

[0007] When the optical fiber in the optical fiber drawing control system is in normal production operation, the paint recovery control system is in an inactive state, at which time the paint supply valve of the paint pipeline to the optical fiber coating cup is in an open state, the paint recovery valve on the bypass pipeline corresponding to each group of paint pipelines is in a closed state, and the negative pressure recovery system is in a negative pressure closed state, saving energy;

[0008] When the paint in the paint storage container exceeds the set liquid level line of the liquid level gauge and the paint recovery control system is in the inactive state, the reflux valve corresponding to the paint storage container opens to return the paint to the paint silo again. The paint silo passes the paint through the feed valve and the paint pipeline into the optical fiber coating cup, so that the paint is reasonably utilized.

[0009] An online recovery device for coating in an optical fiber coating cup, characterized in that it comprises:

[0010] An optical fiber coating cup, which is provided with an inner coating inlet and an outer coating inlet;

[0011] Two sets of paint pipes;

[0012] And two sets of negative pressure recovery systems;

[0013] The two groups of paint pipes are independently provided with corresponding supply valves, and the end output ports of the two groups of paint pipes are independently connected to the corresponding inner coating inlet and outer coating inlet, respectively. A bypass pipeline is arranged in the area between each group of paint pipes corresponding to the supply valve and the optical fiber coating cup, and each of the bypass pipelines is provided with a paint recovery valve, and the output end of the paint recovery valve is connected to the corresponding negative pressure recovery system through the paint recovery pipeline.

[0014] The further feature is that: when the optical fiber is produced normally, the coating recovery valve is in a closed state; when the optical fiber production is stopped due to a sudden tower failure or artificial shutdown, the coating recovery valve is in an open state, and the negative pressure recovery system starts to work to recover the coating;

[0015] When the optical fiber is produced normally, the supply valve is in an open state, and the paint is supplied to the optical fiber coating cup through the paint pipeline; when the optical fiber production is stopped due to a sudden tower failure or human intervention, the supply valve is in a closed state, and the external paint silo cannot supply paint to the optical fiber coating cup through the paint pipeline.

[0016] After adopting the present invention, when the optical fiber production is stopped due to sudden tower failure or artificial production, it can timely recover the excess coating in the optical fiber coating cup to prevent the coating from flowing down to other equipment components on the drawing tower such as UV curing lamp, optical fiber online detector, polarization mode optimization device and optical fiber take-up system, causing equipment damage, optical fiber drawing channel contamination, etc., thereby affecting the optical fiber production quality and manufacturing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] The names corresponding to the serial numbers in the figure are as follows:

[0019] 1- paint pipeline; 2- feed valve; 3- paint recovery valve; 4- paint recovery pipeline; 5- optical fiber coating cup; 6- negative pressure recovery system; 7- optical fiber. DETAILED DESCRIPTION

[0020] An online recovery method for coating in an optical fiber coating cup: a coating recovery control system is preset, the coating recovery control system is connected to an optical fiber drawing control system, when the real-time state in the optical fiber drawing control system is drawing stop or tower break state, the coating recovery control system pneumatically recovers the coating, in the coating recovery operation state, closes the feed valve that feeds the coating to the optical fiber coating cup through the coating pipeline, and opens the coating recovery valve provided on the coating pipeline as a bypass, the bypass pipeline corresponding to the coating recovery valve leads to a coating storage container, the coating storage container is a container receiving end of a negative pressure recovery system, and the negative pressure recovery system is in a negative pressure open state in the coating recovery operation state.

[0021] When the optical fiber in the optical fiber drawing control system is in normal production operation, the paint recovery control system is in an inactive state. At this time, the paint supply valve of the paint pipeline to the optical fiber coating cup is in an open state, and the paint recovery valve on the bypass pipeline corresponding to each group of paint pipelines is in a closed state. At the same time, the negative pressure recovery system is in a negative pressure closed state to save energy;

[0022] When the paint in the paint storage container exceeds the set liquid level line of the liquid level gauge and the paint recovery control system is in the inactive state, the reflux valve corresponding to the paint storage container opens to return the paint to the paint silo again. The paint silo passes the paint through the feed valve and the paint pipeline into the optical fiber coating cup, so that the paint is reasonably utilized.

[0023] An online recovery device for coating in an optical fiber coating cup, see Figure 1 , which includes an optical fiber coating cup 5, two sets of coating pipelines 1, and two sets of negative pressure recovery systems 6;

[0024] The optical fiber coating cup 5 is provided with an inner coating inlet and an outer coating inlet;

[0025] Both negative pressure recovery systems 6 are connected to a PLC module (not shown in the figure), which is connected to the optical fiber drawing control system and is used to sense the real-time status of the optical fiber drawing control system. The PLC module controls the opening or closing of the negative pressure modules, the paint recovery valve 3, and the feed valve 2 corresponding to the two negative pressure recovery systems 6 respectively;

[0026] The two groups of coating pipelines 1 are independently provided with corresponding feed valves 2, and the terminal output ports of the two groups of coating pipelines 1 are independently connected to the corresponding inner coating feed port and outer coating feed port, and each group of coating pipelines 1 is provided with a bypass pipeline in the area between the feed valve 2 and the optical fiber coating cup 5, and each bypass pipeline is provided with a coating recovery valve 3, and the output terminal of the coating recovery valve 3 is connected to the corresponding negative pressure recovery system 6 through the coating recovery pipeline 4. The optical fiber 7 passes through the optical fiber coating cup 5 to perform the optical fiber coating operation.

[0027] In specific implementation, when the optical fiber 7 is in normal production, the paint recovery valve 3 is in a closed state, and when the optical fiber production is stopped due to a sudden tower failure or artificial shutdown, the paint recovery valve 3 is in an open state, and the negative pressure recovery system 5 starts to work to recover the paint;

[0028] When the optical fiber 7 is produced normally, the supply valve 2 is in the open state, and the coating is supplied to the optical fiber coating cup 5 through the coating pipeline 1; when the production of the optical fiber 7 is stopped due to a sudden tower failure or human intervention, the supply valve 2 is in the closed state, and the external coating silo cannot supply coating to the optical fiber coating cup 5 through the coating pipeline 1.

[0029] When optical fiber production is stopped due to sudden tower failure or human intervention, it can promptly recover excess coating in the optical fiber coating cup to prevent the coating from flowing down to other equipment components on the drawing tower, such as UV curing lamps, optical fiber online detectors, polarization mode optimization devices, and optical fiber take-up systems, causing equipment damage, optical fiber drawing channel contamination, etc., affecting optical fiber production quality and manufacturing efficiency.

[0030] 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.

[0031] 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. An online recovery method for coating in an optical fiber coating cup, characterized in that: A paint recovery control system is preset, and the paint recovery control system is connected to the optical fiber drawing control system. When the real-time status in the optical fiber drawing control system is drawing stop or tower break status, the paint recovery control system pneumatically performs paint recovery operation. In the paint recovery operation state, the feed valve for delivering paint to the optical fiber coating cup through the paint pipeline is closed, and the paint recovery valve provided on the paint pipeline is opened at the same time. The bypass pipeline corresponding to the paint recovery valve leads to the paint storage container. The paint storage container is the container receiving end of the negative pressure recovery system. The negative pressure recovery system is in a negative pressure opening state in the paint recovery operation state.

2. The method for online recovery of coating in an optical fiber coating cup according to claim 1, characterized in that: When the optical fiber in the optical fiber drawing control system is in normal production operation, the paint recovery control system is in an inactive state. At this time, the feed valve of the paint pipeline that supplies paint to the optical fiber coating cup is in an open state, the paint recovery valve on the bypass pipeline corresponding to each group of paint pipelines is in a closed state, and the negative pressure recovery system is in a negative pressure closed state.

3. The method for online recovery of coating in an optical fiber coating cup according to claim 2, characterized in that: When the paint in the paint storage container exceeds the set liquid level line of the liquid level gauge and the paint recovery control system is in the inactive state, the reflux valve corresponding to the paint storage container opens to return the paint to the paint silo again, and the paint silo passes the paint through the feed valve and the paint pipeline into the optical fiber coating cup.

4. An online recovery device for coating in an optical fiber coating cup, characterized in that: It includes: An optical fiber coating cup, which is provided with an inner coating inlet and an outer coating inlet; Two sets of paint pipes; And two sets of negative pressure recovery systems; The two groups of paint pipes are independently provided with corresponding supply valves, and the end output ports of the two groups of paint pipes are independently connected to the corresponding inner coating inlet and outer coating inlet, respectively. A bypass pipeline is arranged in the area between each group of paint pipes corresponding to the supply valve and the optical fiber coating cup, and each of the bypass pipelines is provided with a paint recovery valve, and the output end of the paint recovery valve is connected to the corresponding negative pressure recovery system through the paint recovery pipeline.

5. The on-line recovery device for coating in an optical fiber coating cup according to claim 4, characterized in that: When the optical fiber is produced normally, the paint recovery valve is in a closed state. When the optical fiber production is stopped due to a sudden tower failure or artificial shutdown, the paint recovery valve is in an open state, and the negative pressure recovery system starts to work to recover the paint.

6. The on-line recovery device for coating in an optical fiber coating cup according to claim 4, characterized in that: When the optical fiber is produced normally, the supply valve is in an open state, and the paint is supplied to the optical fiber coating cup through the paint pipeline; when the optical fiber production is stopped due to a sudden tower failure or human intervention, the supply valve is in a closed state, and the external paint silo cannot supply paint to the optical fiber coating cup through the paint pipeline.

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