Arrangement structure of optical fiber carbon coating control system
By reasonably arranging the structures of the fiber drawing furnace, preheating furnace and reaction chamber, combined with the reaction gas regulation pipeline and lifting device, the problems of high cost of fiber carbon coating equipment and uneven deposition of carbon film are solved, and the equipment is compact, low-cost and good uniformity of carbon film are achieved.
Patent Information
- Application Number
- CN202422349759.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The existing optical fiber carbon coating technology has the problems of high equipment cost, high control difficulty, and uneven deposition of carbon film thickness.
By reasonably arranging the structures of the fiber optic wire drawing furnace, preheating furnace and reaction chamber, combining the reaction gas adjustment pipeline and lifting device, the distance between the reaction chamber and the preheating furnace is adjusted, and the mixing gas ratio and intake air flow control are used for precise adjustment.
The compact structure of fiber optic carbon coating equipment is realized, which reduces costs, saves installation space, and ensures the uniformity and stability of carbon film thickness.
Smart Images
Figure CN223163362U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of optical fiber manufacturing equipment, and particularly relates to an arrangement structure of an optical fiber carbon coating control system. Background Art
[0002] Optical fiber carbon coating means that during the optical fiber drawing production process, a hydrocarbon mixed gas is introduced into the reaction cavity, and the mixed gas undergoes repeated polymerization and dehydrogenation reactions on the surface of the optical fiber with high temperature, and a carbon film with a certain thickness is deposited on the clean surface before the first organic coating of the optical fiber. The carbon coating film deposited by this reaction can effectively improve the long-term reliability and anti-fatigue performance of the optical fiber, prevent moisture and hydrogen molecules from entering the interior of the optical fiber, and provide protection for the optical fiber.
[0003] There are two ways to provide heat energy for the optical fiber during the carbon film deposition process: 1. Hot wall chemical vapor deposition: heating the reaction cavity to make the temperature of the internal environment of the cavity and the surface temperature of the optical fiber during the drawing process reach the reaction conditions; however, this method is prone to chemical reactions on the inner wall of the reaction cavity to generate a carbon film, which affects the continuous reaction, and a heating furnace needs to be added to the reaction cavity, increasing the equipment cost and the control difficulty of the entire optical fiber production process. 2. Cold wall chemical vapor deposition: not heating the reaction cavity, but preheating the optical fiber before entering the reaction cavity to make the surface temperature of the optical fiber greater than or equal to the reaction condition temperature, which can reduce the size of the heating furnace and the control difficulty; however, the temperature of the optical fiber after entering the reaction cavity heated by this method is not easy to monitor, and the temperature drop rate is uncontrollable, resulting in problems with the uniformity of the carbon film thickness deposition. Content of the Utility Model
[0004] The technical problem to be solved by the utility model is to provide an arrangement structure of an optical fiber carbon coating control system, which has a compact structure, is convenient for installation and maintenance, can effectively save the cost of optical fiber carbon coating equipment, save the installation space, and can conveniently adjust the distance between the reaction cavity and the preheating furnace, as well as the ratio and intake flow rate of the mixed gas in the reaction cavity, so as to ensure the stability and controllability of the carbon film thickness deposition.
[0005] The technical solution adopted by the utility model to solve the above technical problem is as follows:
[0006] An optical fiber carbon coating control system layout structure includes a fiber drawing furnace 200, a preheating furnace 300, and a reaction chamber 400 arranged in sequence along the vertical direction. A lifting device 500 for adjusting its vertical height is connected to the outer wall of the reaction chamber 400, and a corresponding reaction gas adjustment pipeline is connected to the gas port of the reaction chamber 400. A plurality of regulating valves and mass flow meters are provided on the reaction gas adjustment pipeline. A carbon film thickness detector 600 is provided below the fiber outlet at the bottom of the reaction chamber 400; the drawing furnace 200, the preheating furnace 300, the lifting device 500, the regulating valves, the mass flow meters, and the carbon film thickness detector 600 are all electrically connected to the controller in the electric control cabinet 700 through signal lines.
[0007] Further, the reaction gas adjustment pipeline includes an acetylene inlet pipeline 1, a nitrogen inlet pipeline 2, and an exhaust pipeline 3;
[0008] The acetylene inlet pipeline 1 is connected to the acetylene inlet port of the reaction chamber 400. The nitrogen inlet pipeline 2 is divided into a nitrogen inlet branch one and a nitrogen inlet branch two and is respectively connected to the nitrogen inlet port one at the upper part and the nitrogen inlet port two at the lower part of the reaction chamber 400. The exhaust pipeline 3 is connected to the exhaust port of the reaction chamber 400.
[0009] Further, an acetylene gas source regulating valve 4 is installed at the inlet of the acetylene inlet pipeline 1, and an acetylene mass flow meter 6 and an acetylene inlet regulating valve 13 are also installed on the acetylene inlet pipeline 1.
[0010] Further, a nitrogen gas source regulating valve 18 is installed at the inlet of the nitrogen inlet pipeline 2. A nitrogen mass flow meter one 7 and a nitrogen inlet regulating valve one 19 are installed on the nitrogen inlet branch one. A nitrogen mass flow meter two 8 and a nitrogen inlet regulating valve two 20 are installed on the nitrogen inlet branch two.
[0011] Further, an exhaust mass flow meter 9 is installed on the exhaust pipeline 3.
[0012] Further, an acetylene exhaust pipeline 11 is also connected to the acetylene inlet pipeline 1, and an acetylene exhaust regulating valve 12 is installed on the acetylene exhaust pipeline 11.
[0013] Further, the nitrogen inlet pipeline 2 is connected to the acetylene inlet pipeline 1 through a purging branch 10, and a purging regulating valve 5 is installed on the purging branch 10.
[0014] Further, the inlets of the acetylene inlet pipeline 1 and the nitrogen inlet pipeline 2 are respectively connected to corresponding acetylene gas source devices and nitrogen gas source devices; the outlets of the exhaust pipeline 3 and the acetylene exhaust pipeline 11 are respectively connected to corresponding exhaust pumps.
[0015] Further, the lifting device 500 includes a lifting lead screw 14, a guide groove 15, a connecting slider 16, and a servo motor 17. The lifting lead screw 14 is longitudinally disposed inside the guide groove 15, and one end thereof is connected to the servo motor 17. The connecting slider 16 is slidably clamped in the guide groove 15. One end of the connecting slider 16 is fixedly connected to the outer wall of the reaction chamber 400, and the other end is threadedly connected to the lifting lead screw 14.
[0016] Further, the guide groove 15 is provided with a plurality of limit switches for positioning the lifting height of the reaction chamber 400 at a preset interval in the longitudinal direction. The servo motor 17 and the plurality of limit switches are electrically connected to a controller in the electric control cabinet 700.
[0017] The present utility model has the following main advantages compared with the prior art:
[0018] 1. Through the reasonable arrangement of the optical fiber drawing furnace, the preheating furnace, the reaction chamber, and the reaction gas regulating pipeline, the overall structure of the present utility model is compact, easy to install and maintain, can effectively save the cost of the optical fiber carbon coating equipment, save the installation space, and by setting the reaction chamber lifting device, the distance between the reaction chamber and the preheating furnace can be conveniently adjusted to ensure the temperature stability of the optical fiber reaction section inside the reaction chamber, thereby ensuring the uniformity of the carbon film thickness deposition.
[0019] 2. By reasonably arranging the nitrogen inlet pipeline, the acetylene inlet pipeline, and the exhaust pipeline of the reaction chamber, and cooperating with the pneumatic control valves and detection instruments installed on each pipeline, the present utility model can conveniently adjust the ratio and inlet flow rate of the mixed gas in the reaction chamber, thereby improving the stability and controllability of the carbon film thickness deposition. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 is an overall schematic diagram of the layout structure of the optical fiber carbon coating control system in the embodiment of the present utility model;
[0021] Figure 2 is a schematic diagram of the reaction gas regulating pipeline of the reaction chamber in the embodiment of the present utility model.
[0022] In the figure: 100 - optical fiber; 200 - optical fiber drawing furnace; 300 - preheating furnace; 400 - reaction chamber; 500 - lifting device; 600 - carbon film thickness detector; 700 - electric control cabinet; 1 - acetylene inlet pipeline; 2 - nitrogen inlet pipeline; 3 - exhaust pipeline; 4 - acetylene gas source regulating valve; 5 - purging regulating valve; 6 - acetylene mass flowmeter; 7 - nitrogen mass flowmeter I; 8 - nitrogen mass flowmeter II; 9 - exhaust mass flowmeter; 10 - purging branch; 11 - acetylene exhaust pipeline; 12 - acetylene exhaust regulating valve; 13 - acetylene inlet regulating valve; 14 - lifting lead screw; 15 - guiding groove; 16 - connecting slider; 17 - servo motor; 18 - nitrogen gas source regulating valve; 19 - nitrogen inlet regulating valve I; 20 - nitrogen inlet regulating valve II. Detailed implementation manners
[0023] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.
[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.
[0025] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0026] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.
[0027] The features and performance of the present application will be further described in detail below in conjunction with the embodiments.
[0028] As Figure 1As shown in the figure, the present application provides a fiber optic carbon coating control system layout structure, including a fiber drawing furnace 200, a preheating furnace 300, and a reaction chamber 400 arranged in sequence along the vertical direction. The drawn fiber optic enters the reaction chamber 400 after preheating, and a mixed gas of nitrogen and acetylene is introduced into the reaction chamber body, so that the mixed gas undergoes repeated polymerization and dehydrogenation reaction on the surface of the fiber optic with high temperature, and then a carbon film with a certain thickness is deposited on the surface of the fiber optic;
[0029] Below the fiber optic outlet at the bottom of the reaction chamber 400, there is a carbon film thickness detector 600; after the fiber optic 100 passes through the outlet of the fiber drawing furnace 200, it passes through the preheating furnace 300 and the reaction chamber 400 in sequence, and passes through the carbon film thickness detector 600.
[0030] Among them, the outer wall of the reaction chamber 400 is connected with a lifting device 500 for adjusting the vertical height of the reaction chamber 400; the lifting device 500 includes a lifting screw rod 14, a guide groove 15, a connecting slider 16, and a servo motor 17. The lifting screw rod 14 is longitudinally arranged inside the guide groove 15 and its end is connected with the servo motor 17. The connecting slider 16 is slidably clamped in the guide groove 15, and one end of the connecting slider 16 is fixedly connected with the outer wall of the reaction chamber 400, and the other end is threadedly connected with the lifting screw rod 14; the guide groove 15 is provided with a plurality of limit switches for positioning the lifting height of the reaction chamber 400 at a preset interval along the longitudinal direction.
[0031] The servo motor 17 drives the lifting screw rod 14 to rotate, and under the action of the thread, the connecting slider 16 moves up and down along the screw rod, and then drives the reaction chamber 400 to move up and down along the guide groove 15 through the connecting slider 16;
[0032] The installation height of the first limit switch in the guide groove 15 is determined according to the initial relative height between the reaction chamber 400 and the preheating furnace 300 set by the PLC controller. According to the initial relative height and the preset interval of the plurality of limit switches, the height of each limit switch relative to the preheating furnace 300 can be determined, and then the height of the reaction chamber 400 can be positioned in real time during the lifting process.
[0033] The preheating furnace 300 is used to preheat the fiber optic entering the reaction chamber 400, and a temperature sensor is provided in the preheating furnace 300.
[0034] The carbon film thickness detector 600 makes the conductive carbon coating interact with the electromagnetic field through the movement of the fiber optic in the electromagnetic field, and then measures the thickness of the carbon coating on the fiber optic and transmits it to the PLC controller in the form of a voltage analog quantity to realize the on-line detection of the carbon film thickness.
[0035] Further, the gas port of the reaction chamber 400 is connected to a corresponding reaction gas regulating pipeline, and a plurality of regulating valves and mass flow meters are provided on the reaction gas regulating pipeline; the drawing furnace controller in the drawing furnace 200, the temperature sensor in the preheating furnace 300, the servo motor 17 and a plurality of limit switches in the lifting device 500, the regulating valves, the mass flow meters and the carbon film thickness detector 600 are all electrically connected to the PLC controller in the electric control cabinet 700. Specifically:
[0036] The PLC controller is connected to the drawing furnace controller in the drawing furnace 200 for obtaining and adjusting the optical fiber drawing speed;
[0037] The PLC controller is connected to the temperature sensor in the preheating furnace 300 for obtaining the optical fiber preheating temperature;
[0038] The PLC controller is connected to the servo motor 17 of the lifting device 500 for adjusting the rotation angle and speed of the lifting lead screw 14, and further adjusting the height and speed of the reaction chamber 400 rising and falling in the vertical direction;
[0039] Among them, when the lifting lead screw 14 rotates, under the action of the thread, the connecting slider 16 moves up and down along the lead screw, and further drives the reaction chamber 400 to move up and down along the guide groove 15.
[0040] The PLC controller is connected to a plurality of limit switches of the lifting device 500 for positioning the lifting height of the reaction chamber 400 relative to the guide groove 15 according to the installation height of the limit switch triggered by the current reaction chamber 400;
[0041] Among them, the installation height of the first limit switch in the guide groove 15 is determined according to the initial relative height between the reaction chamber 400 and the preheating furnace 300 set by the PLC controller,
[0042] At the same time, according to the initial relative height and the preset spacing of a plurality of limit switches, the height of each limit switch relative to the preheating furnace 300 can be determined, and further the height of the reaction chamber 400 can be positioned in real time during the lifting process.
[0043] The PLC controller is connected to the carbon film thickness detector 600 for obtaining the carbon film thickness of the optical fiber passing through the bottom of the reaction chamber 400.
[0044] As Figure 2 shown, the reaction gas regulating pipeline includes an acetylene inlet pipeline 1, a nitrogen inlet pipeline 2 and an exhaust pipeline 3;
[0045] The acetylene inlet pipeline 1 is connected to the acetylene inlet port of the reaction chamber 400. The nitrogen inlet pipeline 2 is divided into a first nitrogen inlet branch and a second nitrogen inlet branch, which are respectively connected to the first nitrogen inlet port at the upper part of the reaction chamber 400 and the second nitrogen inlet port at the lower part of the reaction chamber 400. By dividing the nitrogen inlet pipeline into upper and lower branches and introducing them into the chamber from the upper and lower parts of the reaction chamber respectively, it can effectively ensure that nitrogen and acetylene gas in the reaction chamber are mixed evenly according to a preset ratio. The exhaust pipeline 3 is connected to the exhaust port of the reaction chamber 400.
[0046] Furthermore, an acetylene gas source regulating valve 4 is installed at the inlet of the acetylene inlet pipeline 1, and an acetylene mass flowmeter 6 and an acetylene inlet regulating valve 13 are also installed on the acetylene inlet pipeline 1.
[0047] Furthermore, a nitrogen gas source regulating valve 18 is installed at the inlet of the nitrogen inlet pipeline 2. A first nitrogen mass flowmeter 7 and a first nitrogen inlet regulating valve 19 are installed on the first nitrogen inlet branch, and a second nitrogen mass flowmeter 8 and a second nitrogen inlet regulating valve 20 are installed on the second nitrogen inlet branch.
[0048] Specifically:
[0049] The PLC controller is connected to the acetylene mass flowmeter 6, the first nitrogen mass flowmeter 7, and the second nitrogen mass flowmeter 8, which are respectively used to obtain the gas flow rates of the acetylene inlet pipeline 1, the first nitrogen inlet branch, and the second nitrogen inlet branch.
[0050] The PLC controller is connected to the acetylene gas source regulating valve 4, the nitrogen gas source regulating valve 18, the first nitrogen inlet regulating valve 19, and the second nitrogen inlet regulating valve 20, which are respectively used to regulate the gas flow rates of the acetylene inlet pipeline 1, the nitrogen inlet pipeline 2, the first nitrogen inlet branch, and the second nitrogen inlet branch.
[0051] Furthermore, an exhaust mass flowmeter 9 is installed on the exhaust pipeline 3, and the exhaust pipeline 3 is connected to a corresponding exhaust pump. The PLC controller is connected to the exhaust pump and the exhaust mass flowmeter 9, which is used to control the opening of the exhaust pipeline and obtain the exhaust gas flow rate of the exhaust pipeline in real time.
[0052] Furthermore, an acetylene exhaust pipeline 11 is also connected to the acetylene inlet pipeline 1, and an acetylene exhaust regulating valve 12 is installed on the acetylene exhaust pipeline 11. The PLC controller is connected to the acetylene exhaust regulating valve 12, which is used to open the acetylene exhaust regulating valve 12 when a system failure occurs, facilitating the emergency discharge of acetylene gas.
[0053] Further, the nitrogen inlet pipeline 2 is connected to the acetylene inlet pipeline 1 through a purging branch 10. A purging regulating valve 5 is installed on the purging branch 10, and the purging regulating valve 5 is connected to a PLC controller. Before the optical fiber carbon coating starts, nitrogen is introduced through the nitrogen inlet pipeline 2 for a preset duration to discharge the residual air in the nitrogen inlet pipeline and its branches, the reaction chamber 400, and the extraction pipeline 3. Meanwhile, the purging regulating valve 5 is opened through the PLC controller, so that a part of the nitrogen in the nitrogen inlet pipeline 2 enters the acetylene inlet pipeline 1 through the purging branch 10 to discharge the residual air in the acetylene inlet pipeline 1.
[0054] Further, the inlets of the acetylene inlet pipeline 1 and the nitrogen inlet pipeline 2 are respectively connected to corresponding acetylene gas source devices (including pneumatic valves and mechanical pressure gauges) and nitrogen gas source devices (including pneumatic valves and mechanical pressure gauges).
[0055] Further, the parts not detailed in this application are the same as or implemented by the prior art.
[0056] In summary:
[0057] 1. Through the reasonable arrangement of the optical fiber drawing furnace, preheating furnace, reaction chamber, and reaction gas regulating pipeline, the overall structure of the present utility model is compact, convenient for installation and maintenance, can effectively save the cost of the optical fiber carbon coating equipment, save the installation space, and by setting the reaction chamber lifting device, the distance between the reaction chamber and the preheating furnace can be conveniently adjusted to ensure the temperature stability of the optical fiber reaction section inside the reaction chamber, thereby ensuring the uniformity of the carbon film thickness deposition.
[0058] 2. By reasonably arranging the nitrogen inlet pipeline, acetylene inlet pipeline, and extraction pipeline of the reaction chamber, and cooperating with the pneumatic regulating valves and detection instruments installed on each pipeline, the present utility model can conveniently adjust the ratio and intake flow rate of the mixed gas in the reaction chamber, thereby improving the stability and controllability of the carbon film thickness deposition.
[0059] The above embodiments are only used to illustrate the design concept and characteristics of the present utility model, and their purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly. The protection scope of the present utility model is not limited to the above embodiments. Therefore, all equivalent changes or modifications made according to the principles and design concepts disclosed by the present utility model are within the protection scope of the present utility model.
Claims
1. An optical fiber carbon coating control system layout structure, characterized in that: It includes an optical fiber drawing furnace (200), a preheating furnace (300) and a reaction chamber (400) arranged successively in the vertical direction. A lifting device (500) for adjusting its vertical height is connected to the outer wall of the reaction chamber (400), and a corresponding reaction gas regulating pipeline is connected to the gas port of the reaction chamber (400). A plurality of regulating valves and mass flow meters are provided on the reaction gas regulating pipeline. A carbon film thickness detector (600) is provided below the optical fiber outlet at the bottom of the reaction chamber (400); the drawing furnace (200), the preheating furnace (300), the lifting device (500), the regulating valves, the mass flow meters and the carbon film thickness detector (600) are all electrically connected to the controller in the electric control cabinet (700) through signal lines.
2. The layout structure of an optical fiber carbon coating control system according to claim 1, characterized in that: The reaction gas regulating pipeline includes an acetylene inlet pipeline (1), a nitrogen inlet pipeline (2) and an exhaust pipeline (3); The acetylene inlet pipeline (1) is connected to the acetylene inlet port of the reaction chamber (400). The nitrogen inlet pipeline (2) is divided into a first nitrogen inlet branch and a second nitrogen inlet branch and is respectively connected to the first nitrogen inlet port and the second nitrogen inlet port at the upper and lower parts of the reaction chamber (400). The exhaust pipeline (3) is connected to the exhaust port of the reaction chamber (400).
3. The layout structure of an optical fiber carbon coating control system according to claim 2, characterized in that: An acetylene gas source regulating valve (4) is installed at the inlet of the acetylene inlet pipeline (1), and an acetylene mass flow meter (6) and an acetylene inlet regulating valve (13) are also installed on the acetylene inlet pipeline (1).
4. A fiber optic carbon coating control system layout structure according to claim 2, characterized in that: A nitrogen gas source regulating valve (18) is installed at the inlet of the nitrogen inlet pipeline (2). A first nitrogen mass flow meter (7) and a first nitrogen inlet regulating valve (19) are installed on the first nitrogen inlet branch. A second nitrogen mass flow meter (8) and a second nitrogen inlet regulating valve (20) are installed on the second nitrogen inlet branch.
5. A fiber optic carbon coating control system layout structure according to claim 2, characterized in that: An exhaust mass flow meter (9) is installed on the exhaust pipeline (3).
6. The layout structure of an optical fiber carbon coating control system according to claim 3, characterized in that: An acetylene exhaust pipeline (11) is also connected to the acetylene inlet pipeline (1), and an acetylene exhaust regulating valve (12) is installed on the acetylene exhaust pipeline (11).
7. A fiber optic carbon coating control system layout structure according to claim 2, characterized in that: The nitrogen inlet pipeline (2) is connected to the acetylene inlet pipeline (1) through a purging branch (10), and a purging regulating valve (5) is installed on the purging branch (10).
8. The arrangement structure of an optical fiber carbon coating control system according to claim 2, characterized in that: The inlets of the acetylene inlet pipeline (1) and the nitrogen inlet pipeline (2) are respectively connected to corresponding acetylene gas source devices and nitrogen gas source devices; the outlets of the exhaust pipeline (3) and the acetylene exhaust pipeline (11) are respectively connected to corresponding exhaust pumps.
9. A fiber optic carbon coating control system layout structure according to claim 1, characterized in that: The lifting device (500) includes a lifting lead screw (14), a guide groove (15), a connecting slider (16) and a servo motor (17). The lifting lead screw (14) is longitudinally arranged inside the guide groove (15) and its end is connected to the servo motor (17). The connecting slider (16) is slidably clamped in the guide groove (15), and one end of the connecting slider (16) is fixedly connected to the outer wall of the reaction chamber (400), and the other end is threadedly connected to the lifting lead screw (14).
10. A fiber optic carbon coating control system arrangement structure according to claim 9, characterized in that: The guiding groove (15) is provided with a plurality of limit switches for positioning the lifting height of the reaction chamber (400) at preset intervals along the longitudinal direction, and both the servo motor (17) and the limit switches are electrically connected to a controller in the electric control cabinet (700).