阅读说明：本技术 一种光纤高速拉丝紫外固化装置 (High-speed optical fiber drawing ultraviolet curing device ) 是由 陈宏达 李凡 眭立洪 于 2019-11-01 设计创作，主要内容包括：本申请涉及一种光纤高速拉丝紫外固化装置,包括：紫外固化炉,包括固化炉主体(1)和设置在所述固化炉主体(1)内的石英玻璃管(2)；废气抽取组件,包括抽取组件壳体(3)和设置在所述抽取组件壳体(3)上的抽风管(4),所述抽风管(4)一端连通抽风风机,另一端连通所述石英玻璃管(2)；氮气供给组件,包括供给组件壳体(5)、设置在所述供给组件壳体(5)上的进气气管以及连接在所述进气气管上的流量计,所述进气气管一端连通气源,另一端连通所述石英玻璃管(2)。本发明光纤高速拉丝紫外固化装置设计巧妙,使固化时氧含量浓度稳定,环境可控,且固化过程中产生的废气可以及时抽取,使拉丝速度和连续拉丝的长度得到优化。(The application relates to a high-speed wire drawing ultraviolet curing device of optic fibre includes: the ultraviolet curing furnace comprises a curing furnace body (1) and a quartz glass tube (2) arranged in the curing furnace body (1); the waste gas extraction assembly comprises an extraction assembly shell (3) and an exhaust pipe (4) arranged on the extraction assembly shell (3), wherein one end of the exhaust pipe (4) is communicated with an exhaust fan, and the other end of the exhaust pipe is communicated with the quartz glass tube (2); the nitrogen gas supply assembly comprises a supply assembly shell (5), a gas inlet pipe arranged on the supply assembly shell (5) and a flowmeter connected to the gas inlet pipe, wherein one end of the gas inlet pipe is communicated with a gas source, and the other end of the gas inlet pipe is communicated with the quartz glass pipe (2). The optical fiber high-speed wire drawing ultraviolet curing device is ingenious in design, so that the oxygen content concentration is stable during curing, the environment is controllable, waste gas generated in the curing process can be extracted in time, and the wire drawing speed and the continuous wire drawing length are optimized.)

1. The utility model provides an optic fibre high speed wire drawing ultraviolet curing device which characterized in that includes:

the ultraviolet curing furnace comprises a curing furnace body (1) and a quartz glass tube (2) arranged in the curing furnace body (1);

the waste gas extraction assembly comprises an extraction assembly shell (3) and an exhaust pipe (4) arranged on the extraction assembly shell (3), wherein one end of the exhaust pipe (4) is communicated with an exhaust fan, and the other end of the exhaust pipe is communicated with the quartz glass tube (2);

the nitrogen gas supply assembly comprises a supply assembly shell (5), a gas inlet pipe arranged on the supply assembly shell (5) and a flowmeter connected to the gas inlet pipe, wherein one end of the gas inlet pipe is communicated with a gas source, and the other end of the gas inlet pipe is communicated with the quartz glass pipe (2);

the waste gas extraction assembly and the nitrogen gas supply assembly are respectively arranged at two ends of the quartz glass tube (2), a detection port (6) communicated to the quartz glass tube (2) is formed in the extraction assembly shell (3), an oxygen content detector is externally connected to the detection port (6), and the flow meter controls the air inlet flow in the air inlet tube according to the detection result of the oxygen content detector.

2. The ultraviolet curing device for high-speed fiber drawing according to claim 1, wherein the exhaust gas extraction assembly further comprises a pressure gauge (7), and the pressure gauge (7) is connected to the exhaust pipe (4) to detect the pressure inside the exhaust pipe (4).

3. The optical fiber high-speed drawing ultraviolet curing device according to claim 1, wherein the gas source comprises a nitrogen gas source and a mixed gas source of nitrogen and compressed air, the gas inlet pipe comprises a nitrogen gas pipe (8) communicated with the nitrogen gas source and a mixed gas pipe (9) communicated with the mixed gas source of nitrogen and compressed air, and the supply assembly housing (5) is provided with a pair of gas inlets respectively communicated with the nitrogen gas pipe (8) and the mixed gas pipe (9).

4. The optical fiber high-speed drawing ultraviolet curing device according to claim 3, wherein the flow meter is connected to the mixing gas pipe (9) and controls the flow rate of the inlet gas in the mixing gas pipe (9).

5. The optical fiber high-speed drawing ultraviolet curing device according to claim 3, wherein the supply assembly housing comprises a base plate (10), an upper outer shell (11) fixed with the base plate (10) and a lower outer shell (12) fixed with the upper outer shell (11), the base plate (10), the upper outer shell (11) and the lower outer shell (12) are hollow inside and are communicated with each other to form a hollow pipeline, and the end part of the quartz glass tube (2) is fixed with the base plate (10) and is communicated with the quartz glass tube (2).

6. The ultraviolet curing device for high-speed drawing of optical fiber according to claim 5, wherein the upper outer shell (11) and the lower outer shell (12) are respectively provided with one of the air inlets, the mixed gas pipe (9) is communicated with the air inlet of the upper outer shell (11), the nitrogen gas pipe (8) is communicated with the air inlet of the lower outer shell (12), and the mixed gas pipe (9) and the nitrogen gas pipe (8) are communicated with the quartz glass tube (2) through the hollow pipeline.

7. The ultraviolet curing device for high-speed fiber drawing according to claim 5, wherein a waste gas discharge assembly is further connected to the bottom of the lower housing (12), the waste gas discharge assembly comprises a waste discharge pipeline (13) communicated with the hollow pipeline, and an exhaust fan is connected to the waste discharge pipeline (13).

8. The ultraviolet curing device for high-speed drawing of the optical fiber according to claim 5, wherein a nitrogen gas supply split core (14) is further arranged in the hollow pipeline, the nitrogen gas supply split core (14) is clamped between the upper outer shell (11) and the lower outer shell (12) and gaps are respectively formed between the nitrogen gas supply split core (14) and the upper outer shell (11) and the lower outer shell (12), and the direction of the gas flow in the hollow pipeline is changed when the gas flow passes through the gaps.

9. The ultraviolet curing device for high-speed drawing of optical fibers according to claim 1, wherein an exhaust gas extraction device core (15) is further disposed in the extraction assembly housing (3), the exhaust gas extraction device core (15) has a hollow portion communicated with the quartz glass tube (2), at least 2 air holes (16) are disposed on the exhaust gas extraction device core (15), and an air flow enters the hollow portion through the quartz glass tube (2) and then enters the exhaust pipe (4) through the air holes (16).

10. The ultraviolet curing device for high-speed drawing of the optical fiber according to claim 1, wherein rubber sealing rings (17) are arranged at the joints of the two ends of the quartz glass tube (2) and the waste gas extraction assembly and the nitrogen gas supply assembly.

Technical Field

The application belongs to the field of optical fiber production and manufacturing, and particularly relates to an optical fiber high-speed wire drawing ultraviolet curing device.

Background

In the process of producing the optical fiber, the protective coating of the optical fiber needs to be instantly cured by an ultraviolet curing furnace, the curing process needs to exist in an environment with stable and controllable oxygen content concentration, and waste gas generated in the curing process needs to be extracted in time. The degree of satisfaction of the above two requirements often determines the drawing speed and the continuous drawing length that the optical fiber drawing apparatus can achieve.

The nitrogen supply and exhaust device of the currently used ultraviolet curing furnace is simple, and one end of the nitrogen supply and exhaust device is used for extracting waste gas and the other end of the nitrogen supply. The quartz glass tube is connected with the quartz glass tube and the exhaust gas, so that an environment with controllable oxygen concentration is formed in the quartz glass tube, and the gas containing the exhaust gas is continuously extracted. However, the oxygen content in the quartz central tube is determined by the extraction amount of the waste gas and the supply amount of the nitrogen gas, so that the oxygen content is difficult to confirm in the wire drawing process, and the adjustment and tracking can be performed only through the solidification condition and abnormal phenomena in the wire drawing process, which is very easy to cause waste. Meanwhile, the single end extracts the waste gas, so that the waste gas is not completely extracted under the condition of high-speed fiber drawing of the optical fiber, and the oxygen content difference of the upper opening and the lower opening in the quartz central tube is very easy to cause. The nitrogen supply structure is simple, nitrogen is easy to escape from the lower port, and the effective utilization rate is low. Air exhaust structure is simple, and the circumference speed degree of consistency of bleeding is low, can lead to the optical fiber to rock in the wire drawing process when increasing the power of bleeding, influences the coating quality and the intensity of optical fiber.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the high-speed optical fiber drawing ultraviolet curing device is economical and efficient, and has a good drawing effect.

The technical scheme adopted by the invention for solving the technical problems is as follows:

an optical fiber high-speed drawing ultraviolet curing device comprises:

the ultraviolet curing oven comprises a curing oven body and a quartz glass tube arranged in the curing oven body;

the waste gas extraction assembly comprises an extraction assembly shell and an exhaust pipe arranged on the extraction assembly shell, wherein one end of the exhaust pipe is communicated with the exhaust fan, and the other end of the exhaust pipe is communicated with the quartz glass tube;

the nitrogen gas supply assembly comprises a supply assembly shell, a gas inlet pipe arranged on the supply assembly shell and a flowmeter connected to the gas inlet pipe, wherein one end of the gas inlet pipe is communicated with a gas source, and the other end of the gas inlet pipe is communicated with the quartz glass pipe;

the waste gas extraction assembly and the nitrogen gas supply assembly are respectively arranged at two ends of the quartz glass tube, a detection port communicated to the quartz glass tube is arranged on the extraction assembly shell, the detection port is externally connected with an oxygen content detector, and the flow meter controls the air inlet flow in the air inlet tube according to the detection result of the oxygen content detector.

In one embodiment, the exhaust gas extraction assembly further comprises a pressure gauge connected to the exhaust pipe for detecting the pressure in the exhaust pipe.

In one embodiment, the air source comprises a nitrogen air source and a mixed air source of nitrogen and compressed air, the air inlet pipe comprises a nitrogen air pipe communicated with the nitrogen air source and a mixed air pipe communicated with the mixed air source of nitrogen and compressed air, and the supply assembly shell is provided with a pair of air inlets respectively communicated with the nitrogen air pipe and the mixed air pipe.

In one embodiment, the flow meter is connected to the mixing gas pipe and controls the flow rate of the intake gas in the mixing gas pipe.

In one embodiment, the supply assembly housing includes a base plate, an upper shell fixed to the base plate, and a lower shell fixed to the upper shell, the base plate, the upper shell, and the lower shell being hollow inside and communicating with each other to form a hollow pipe, and the end of the quartz glass pipe is fixed to the base plate and communicates with the hollow pipe and the quartz glass pipe.

In one embodiment, the upper outer shell and the lower outer shell are respectively provided with the air inlet, the mixed air pipe is communicated with the air inlet of the upper outer shell, the nitrogen air pipe is communicated with the air inlet of the lower outer shell, and the mixed air pipe and the nitrogen air pipe are communicated with the quartz glass pipe through the hollow pipeline.

In one embodiment, the bottom of the lower shell is further connected with an exhaust gas discharge assembly, the exhaust gas discharge assembly comprises an exhaust pipeline communicated with the hollow pipeline, and an exhaust fan is connected to the exhaust pipeline.

In one embodiment, a nitrogen gas supply flow dividing core is further arranged in the hollow pipeline, the nitrogen gas supply flow dividing core is clamped between the upper shell and the lower shell, gaps are respectively formed between the nitrogen gas supply flow dividing core and the upper shell and between the nitrogen gas supply flow dividing core and the lower shell, and the direction of gas flow in the hollow pipeline is changed when the gas flow passes through the gaps.

In one embodiment, an exhaust gas extraction device core is further disposed in the extraction assembly housing, the exhaust gas extraction device core has a hollow portion communicated with the quartz glass tube, the exhaust gas extraction device core is provided with at least 2 gas holes, and gas flow enters the hollow portion through the quartz glass tube and then enters the exhaust pipe through the gas holes.

In one embodiment, rubber sealing rings are arranged at the joints of the two ends of the quartz glass tube, the exhaust gas extraction assembly and the nitrogen gas supply assembly.

The invention has the beneficial effects that: the optical fiber high-speed wire drawing ultraviolet curing device is ingenious in design, so that the oxygen content concentration is stable during curing, the environment is controllable, waste gas generated in the curing process can be extracted in time, and the wire drawing speed and the continuous wire drawing length are optimized; after the waste gas extraction assembly is improved and the oxygen content monitoring port is arranged, the oxygen content in the quartz glass tube can be monitored in real time in the high-speed wire drawing process, and the proportion of compressed air in mixed gas in the nitrogen supply assembly is quantitatively adjusted, so that the regulation and control efficiency is improved, and resources are saved; the improved nitrogen supply assembly can provide uniform and stable airflow, improves the use efficiency of nitrogen through the air seal structure, reduces the vibration of optical fibers and prevents the curing effect from being influenced; the waste gas exhaust assembly can effectively reduce the waste gas proportion around the optical fiber in the high-speed wire drawing process, improve the wire drawing speed and prolong the continuous wire drawing time.

Drawings

The technical solution of the present application is further explained below with reference to the drawings and the embodiments.

FIG. 1 is a schematic structural diagram of an optical fiber high-speed drawing UV curing device according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of an exhaust extraction assembly according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a nitrogen gas supply assembly according to an embodiment of the present application.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the scope of the present application. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art through specific situations.

The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

An optical fiber high-speed drawing ultraviolet curing device comprises:

the ultraviolet curing furnace comprises a curing furnace body 1 and a quartz glass tube 2 arranged in the curing furnace body 1;

the waste gas extraction assembly comprises an extraction assembly shell 3 and an exhaust pipe 4 arranged on the extraction assembly shell 3, wherein one end of the exhaust pipe 4 is communicated with an external exhaust fan, and the other end of the exhaust pipe is communicated with the quartz glass tube 2;

the nitrogen gas supply assembly comprises a supply assembly shell 5, a gas inlet pipe arranged on the supply assembly shell 5 and a flowmeter (not shown in the figure) connected to the gas inlet pipe, wherein one end of the gas inlet pipe is communicated with an external gas source, and the other end of the gas inlet pipe is communicated with the quartz glass tube 2;

wherein, exhaust gas extraction subassembly and nitrogen gas supply assembly set up respectively at the both ends of quartz glass pipe 2, are equipped with on the extraction subassembly casing 3 and communicate to the detection mouth 6 of quartz glass pipe 2, and detection mouth 6 external oxygen content detector (not shown in the figure), and the air intake flow in the air inlet pipe is controlled according to oxygen content detector testing result to the flowmeter. In the embodiment, the computer can be used for receiving and analyzing the detection result of the oxygen content detector and controlling the flow meter to control the air inlet flow in the air inlet pipe; manual analysis of the oxygen content detector and operation of the flow meter, etc. may also be performed.

In one embodiment, the nitrogen gas supply assembly and the exhaust gas extraction assembly are fixed to the curing oven body 1 by screws. The upper part of the curing furnace body 1 is provided with a waste gas extraction component, and the lower part is provided with a nitrogen supply component. The nitrogen gas supply assembly and the waste gas extraction assembly are connected through a quartz glass tube 2, and a sealing piece is arranged at the connecting position for sealing.

In one embodiment, the flow meter is a float flow meter or a mass flow meter.

In one embodiment, the exhaust gas extraction assembly further comprises a pressure gauge 7, and the pressure gauge 7 is connected to the exhaust pipe 4 to detect the pressure inside the exhaust pipe 4.

In one embodiment, the air sources include a nitrogen air source and a mixed air source of nitrogen and compressed air, the intake air pipe includes a nitrogen air pipe 8 communicated with the nitrogen air source and a mixed air pipe 9 communicated with the mixed air source of nitrogen and compressed air, and the supply assembly housing 5 is provided with a pair of air inlets respectively communicated with the nitrogen air pipe 8 and the mixed air pipe 9. In one embodiment, a flow meter is connected to the mixing gas pipe 9 to control the flow rate of the intake gas in the mixing gas pipe 9. The nitrogen gas supply assembly is internally provided with two gas inlets, the upper port of the nitrogen gas supply assembly is connected with a mixed gas pipe 9 of nitrogen gas and compressed air, and mixed gas of the nitrogen gas and the compressed air is introduced into the quartz glass tube 2 through an internal structure. The amounts of nitrogen and compressed air used are controlled by a float flow meter or a mass flow meter connected to the mixed gas pipe 9. The lower port is connected with a nitrogen gas pipe 8, and a gas seal is formed through the internal structure. The design reduces the phenomenon that the mixed gas in the quartz glass tube 2 is taken out by the optical fiber in the high-speed wire drawing process on one hand, and reduces the phenomenon that the mixed gas in the quartz glass tube 2 is taken out in the lower-opening waste gas extraction process on the other hand, so that the oxygen content in the quartz glass tube 2 is influenced.

In one embodiment, the supply module case includes a substrate 10, an upper case 11 fixed to the substrate 10, and a lower case 12 fixed to the upper case 11, the substrate 10, the upper case 11, and the lower case 12 are hollow inside and communicate with each other to form a hollow pipe, and an end of the quartz glass tube 2 is fixed to the substrate 10 and communicates the hollow pipe with the quartz glass tube 2.

In one embodiment, the upper housing 11 and the lower housing 12 are each provided with an air inlet, the mixed gas pipe 9 is communicated with the air inlet of the upper housing 11, the nitrogen gas pipe 8 is communicated with the air inlet of the lower housing 12, and the mixed gas pipe 9 and the nitrogen gas pipe 8 are communicated with the quartz glass tube 2 through a hollow pipeline. In the present embodiment, the nitrogen gas supply unit is supplied with a mixed gas of nitrogen gas and compressed air from the upper casing 11 and pure nitrogen gas from the lower casing 12, respectively. The mixed gas flow of nitrogen and compressed air blown upward is blown into the quartz glass tube 2, and the gas flow is drawn upward by the exhaust gas drawing component. The downward flow of air forms an air seal at the outlet of the lower housing 12. The improved nitrogen supply assembly can provide uniform and stable airflow, improves the use efficiency of nitrogen through the air seal structure, reduces the vibration of optical fibers and prevents the curing effect from being influenced.

In order to reduce the pollution caused by the waste gas brought out from the lower part of the quartz glass tube 2 in the high-speed optical fiber drawing process, in one embodiment, the bottom of the lower shell 12 is further connected with a waste gas discharge assembly, the waste gas discharge assembly comprises a waste discharge pipeline 13 communicated with the hollow pipeline, and the waste discharge pipeline 13 is connected with an exhaust fan. The exhaust gas exhaust pipeline 13 is designed symmetrically, so that the position deviation and vibration of the optical fiber caused by exhaust gas extraction can be effectively reduced. There may be two exhaust fans respectively connected to the two waste discharge pipelines 13. The air valve can be adjusted to provide smaller negative pressure air draft for extracting a small amount of waste gas from the optical fiber during the high-speed wire drawing process. Above-mentioned waste gas discharge subassembly can effectively reduce the waste gas proportion around the high-speed wire drawing in-process optic fibre, promotes wire drawing speed, prolongs continuous wire drawing time.

In one embodiment, a nitrogen gas supply split flow core 14 is further arranged in the hollow pipeline, the nitrogen gas supply split flow core 14 is clamped between the upper shell 11 and the lower shell 12, gaps are respectively formed between the nitrogen gas supply split flow core 14 and the upper shell 11 and the lower shell 12, and the air flow in the hollow pipeline changes the air flow direction when passing through the gaps, so that the air flow is blown out in a relatively inclined direction. In one embodiment, a circumferential ring groove is further formed in the gap, and the airflow is blown out of the uniform circumferential ring groove after passing through the gap, so that quite stable and uniform airflow can be obtained.

In one embodiment, an exhaust gas extraction device core 15 is further disposed in the extraction assembly housing 3, the exhaust gas extraction device core 15 has a hollow portion communicated with the quartz glass tube 2, at least 2 air holes 16 are disposed on the exhaust gas extraction device core 15, and the air flow enters the hollow portion through the quartz glass tube 2 and then enters the exhaust pipe 4 through the air holes 16. In one embodiment, the suction fan rotates to generate a negative pressure in the space formed between the extraction assembly housing 3 and the exhaust gas extraction device core, so as to extract the air holes 16 on the exhaust gas extraction device core, and further extract the exhaust gas in the quartz glass tube 2 below and discharge the exhaust gas through the fan. In one embodiment, the number of air holes 16 is 8, and the shape is circular. A plurality of gas pockets 16 can be effectively with the wind pressure homogenization and share, guarantee to take out when exhaust gas intensity is sufficient possess even stable exhaust gas effect of taking out.

In one embodiment, the oxygen content detection port on the extraction assembly housing 3 is above the quartz glass tube 2. The gas in the silica glass tube 2 drawn through the exhaust gas extraction assembly can be easily analyzed. The detection can be used as a regular detection item and can also be used as a real-time monitoring item in the stable production process.

In order to further improve the gas tightness, in one embodiment, rubber sealing rings 17 are arranged at the connection of the two ends of the quartz glass tube 2 with the exhaust gas extraction assembly and the nitrogen gas supply assembly.

The invention has the beneficial effects that: the optical fiber high-speed wire drawing ultraviolet curing device is ingenious in design, so that the oxygen content concentration is stable during curing, the environment is controllable, waste gas generated in the curing process can be extracted in time, and the wire drawing speed and the continuous wire drawing length are optimized; after the waste gas extraction assembly is improved and the oxygen content monitoring port is arranged, the oxygen content in the quartz glass tube can be monitored in real time in the high-speed wire drawing process, and the proportion of compressed air in mixed gas in the nitrogen supply assembly is quantitatively adjusted, so that the regulation and control efficiency is improved, and resources are saved; the improved nitrogen supply assembly can provide uniform and stable airflow, improves the use efficiency of nitrogen through the air seal structure, reduces the vibration of optical fibers and prevents the curing effect from being influenced; the waste gas exhaust assembly can effectively reduce the waste gas proportion around the optical fiber in the high-speed wire drawing process, improve the wire drawing speed and prolong the continuous wire drawing time.

In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.