Optical fiber exhaust gas extraction system and optical fiber exhaust gas extraction method

Abstract

The present invention discloses an optical fiber exhaust gas extraction system and an optical fiber exhaust gas extraction method. The optical fiber exhaust gas extraction system includes a tension meter for connecting and obtaining the tension of the optical fiber, at least two primary exhaust gas adsorption devices for installation under a UV coating curing device; the primary exhaust gas adsorption device has an adsorption port with a narrow slot-shaped cross section; the adsorption port is close to the optical fiber and extends in the same direction as the optical fiber; all the adsorption ports are used to surround the circumference of the optical fiber to absorb the exhaust gas of the optical fiber and maintain the balance of the circumferential force system of the optical fiber; the primary exhaust gas adsorption device is connected to the suction device through a primary electric valve; all the primary electric valves and the tension meter are electrically connected to a controller. The optical fiber exhaust gas extraction system provides concentrated and widely covered suction to the optical fiber through the narrow slot-shaped adsorption port; the suction of all the adsorption ports maintains the balance of the circumferential force system of the optical fiber; the controller adjusts the opening of the primary electric valve according to the detection value feedback of the tension meter to reasonably adjust the suction of the adsorption port.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber manufacturing, and in particular to an optical fiber exhaust gas extraction system. The present invention also relates to an optical fiber exhaust gas extraction method, which is applied to the optical fiber exhaust gas extraction system. Background Art

[0002] In order to protect the optical fiber and improve its attenuation performance, a layer of resin is usually applied to the surface of the optical fiber. The widely used optical fiber resin coating method currently includes the following steps: first, liquid resin is applied to the optical fiber; second, the optical fiber is passed through a UV curing device, and the resin on the surface of the optical fiber is cured by the UV curing device. In order to ensure that the UV curing device can cure the resin smoothly, a photoinitiator is usually added to the aforementioned resin, such as a liquid resin. When the photoinitiator passes through the UV curing device, part of the photoinitiator will sublimate into gas. When the gaseous photoinitiator encounters a relatively low temperature device, it will liquefy into liquid or condense into solid, and then adhere to the components behind it, causing the equipment below the UV curing device to malfunction.

[0003] In the prior art, in addition to frequent manual cleaning of the equipment under the UV curing device, an exhaust gas adsorption device is also provided. The exhaust gas adsorption device is in a round shape and is directly connected to the vacuum pipeline. On the one hand, because the exhaust gas adsorption device has a large exhaust area, it cannot effectively adsorb the exhaust gas below the UV curing device and on the surface and surrounding of the optical fiber; on the other hand, the exhaust gas adsorption device is easy to cause the optical fiber to shake when the optical fiber tension is too low, affecting the normal production operation of the optical fiber. Summary of the invention

[0004] The purpose of the present invention is to provide an optical fiber exhaust extraction system, which improves the absorption efficiency of optical fiber exhaust, prolongs the maintenance period of the equipment, reduces the maintenance cost of the equipment and the cleaning intensity of the operator, and avoids excessive shaking of the optical fiber due to exhaust extraction, thereby affecting the normal production operation of the optical fiber. Another purpose of the present invention is to provide an optical fiber exhaust extraction method, which is applied to the above optical fiber exhaust extraction system.

[0005] To achieve the above object, the present invention provides an optical fiber exhaust gas extraction system, comprising a tension meter for connecting and obtaining the tension of the optical fiber, and at least two primary exhaust gas adsorption devices for installation under a UV coating curing device;

[0006] Any of the primary exhaust gas adsorption devices has an adsorption port with a narrow slot-shaped cross section; any of the adsorption ports is adjacent to the optical fiber and extends in the same direction as the optical fiber; all of the adsorption ports are used to surround the circumference of the optical fiber to absorb the exhaust gas of the optical fiber and maintain the balance of the circumferential force system of the optical fiber;

[0007] Any of the primary exhaust gas adsorption devices is connected to the air intake device through a primary electric valve; all of the primary electric valves and the tension meter are electrically connected to a controller; and the controller adjusts the opening of all of the primary electric valves according to the tension meter.

[0008] Preferably, the number of all the primary exhaust gas adsorption devices is an even number, and all the adsorption ports are symmetrically arranged with the optical fiber as the symmetry axis.

[0009] Preferably, the cross section of any one of the adsorption ports is in the shape of a rectangular groove.

[0010] Preferably, it also includes a secondary exhaust gas adsorption device installed below the UV coating curing device; the secondary exhaust gas adsorption device has a cylindrical adsorption port for sleeved optical fiber to absorb the exhaust gas of the optical fiber and maintain the balance of the circumferential force system of the optical fiber;

[0011] The secondary exhaust gas adsorption device is connected to the air intake device through a secondary electric valve; the secondary electric valve is electrically connected to the controller; and the controller adjusts the opening of the secondary electric valve according to the tension meter.

[0012] Preferably, the secondary exhaust gas adsorption device is located below the primary exhaust gas adsorption device.

[0013] Preferably, the periphery of the secondary exhaust gas adsorption device is provided with a plurality of secondary exhaust gas connecting pipes distributed symmetrically or in a circular array in the same radial plane; the air intake device is connected to all the secondary exhaust gas connecting pipes.

[0014] Preferably, the secondary exhaust gas adsorption device includes at least two cavity plates which are used to surround and be assembled on the circumference of the optical fiber.

[0015] Preferably, the secondary exhaust gas adsorption device comprises two semi-cylindrical cavity plates; one pair of adjacent sides of the two cavity plates are hinged; the other pair of adjacent sides of the two cavity plates are connected by buckles;

[0016] The center of the upper end surface and the center of the lower end surface of the secondary exhaust gas adsorption device are respectively provided with fiber penetration holes for allowing the optical fiber to directly penetrate.

[0017] The present invention also provides an optical fiber exhaust gas extraction method, which is applied to the above optical fiber exhaust gas extraction system, comprising:

[0018] S1: Obtain the tension value of the optical fiber under the UV coating curing device;

[0019] S2: adjusting the suction force of the primary exhaust gas adsorption device and the suction force of the secondary exhaust gas adsorption device according to the tension value.

[0020] Preferably, before step S1, the step further includes:

[0021] S01: Adjust the opening of the primary electric valve connected to the primary exhaust gas adsorption device to 0; adjust the opening of the secondary electric valve connected to the secondary exhaust gas adsorption device to 10%;

[0022] The step S2 specifically includes:

[0023] S21: Determine whether the tension value is greater than a preset value F1; if not, return to step S01; if yes, proceed to step S22;

[0024] S22: adjusting the opening of the primary electric valve to a first opening; adjusting the opening of the secondary electric valve (6) to a second opening;

[0025] in,

[0026] φ1={(F-F1) / (F2-F1)}×100%;

[0027] φ2={0.9(F-F1) / (F2-F1)+0.1}×100%;

[0028] φ1 is the first opening; φ2 is the second opening; F is the tension value; and F2 is the maximum tension value of the optical fiber (01) in the drawing state.

[0029] The optical fiber exhaust gas extraction system comprises a controller, a tension meter, an air suction device and at least two primary exhaust gas adsorption devices.

[0030] The tension meter is used to connect the optical fiber to obtain the tension of the optical fiber in real time during production operations.

[0031] The primary exhaust gas adsorption device is used to be installed below the UV coating curing device. The primary exhaust gas adsorption device has an adsorption port with a narrow slot-shaped cross section; the adsorption port is adjacent to the optical fiber and extends in the same direction as the optical fiber. All adsorption ports of all primary exhaust gas adsorption devices surround the circumference of the optical fiber, and the suction device is connected to all primary exhaust gas adsorption devices. The suction device provides negative pressure to the circumference of the optical fiber through all adsorption ports to extract exhaust gas and maintain the circumferential force balance of the optical fiber.

[0032] Any one of the primary exhaust gas adsorption devices is connected to the air intake device through a primary electric valve; all the primary electric valves and the tension meter are electrically connected to the controller; and the controller adjusts the opening of all the primary electric valves according to the tension meter.

[0033] On the one hand, the optical fiber exhaust extraction system absorbs the exhaust gas around the optical fiber through multiple primary exhaust gas adsorption devices. The primary exhaust gas adsorption device has an adsorption port in the shape of a narrow slot, which can extend in the same direction as the optical fiber, which can not only increase the length of the adsorption port's coverage path for the optical fiber, but also allow the negative pressure of the adsorption port to be centrally set according to the path direction of the optical fiber, thereby improving the suction force and adsorption efficiency. On the other hand, the suction force of the adsorption port is adjusted by feedback from the controller, the tension meter, and the primary electric valve connected to the primary exhaust gas adsorption device. When the tension meter detects that the tension of the optical fiber is large, the controller increases the opening of the primary electric valve to increase the suction force of the adsorption port; conversely, when the tension meter detects that the tension of the optical fiber is small, the controller reduces the opening of the primary electric valve to reduce the suction force of the adsorption port.

[0034] It can be seen that the optical fiber exhaust gas extraction system provided by the present invention adjusts the suction force of the exhaust gas according to the actual tension of the optical fiber in the production operation, which can effectively prevent the optical fiber from shaking. Compared with the prior art, the suction port of the primary exhaust gas adsorption device is flat and is adjacent to the optical fiber drawing path in the same direction, so that the negative pressure suction force generated by the suction port is concentrated on the optical fiber, thereby improving the exhaust gas extraction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0036] Figure 1 A schematic diagram of the structure of an optical fiber exhaust gas extraction system provided in an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of the structure of a primary adsorption device provided in an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of the structure of a secondary adsorption device provided in an embodiment of the present invention;

[0039] Figure 4 A schematic flow chart of a first optical fiber exhaust gas extraction method provided by an embodiment of the present invention;

[0040] Figure 5 A schematic flow chart of a second optical fiber exhaust gas extraction method provided in an embodiment of the present invention.

[0041] Among them, 01-optical fiber, 02-UV coating curing device, 1-primary exhaust gas adsorption device, 11-adsorption port, 12-primary exhaust gas connecting pipe, 2-secondary exhaust gas adsorption device, 201-upper end surface, 21-cavity plate, 22-clip, 23-secondary exhaust gas connecting pipe, 24-fiber insertion hole, 3-tension meter, 4-controller, 5-primary electric valve, 6-secondary electric valve, 7-air suction device. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0044] Please refer to Figures 1 to 5 , Figure 1 A schematic diagram of the structure of an optical fiber exhaust gas extraction system provided in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a primary adsorption device provided in an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a secondary adsorption device provided in an embodiment of the present invention; Figure 4 A schematic diagram of a process for extracting exhaust gas from an optical fiber provided by an embodiment of the present invention; Figure 5 A schematic flow chart of a second optical fiber exhaust gas extraction method provided in an embodiment of the present invention.

[0045] The present invention provides an optical fiber exhaust gas extraction system, comprising a controller 4, a tension meter 3 for connecting and obtaining the tension of an optical fiber 01, at least two primary exhaust gas adsorption devices 1 for installation under a UV coating curing device 2, and an air suction device 7 connected to all the primary exhaust gas adsorption devices 1.

[0046] The tension meter 3 is connected to the optical fiber 01, for example, connected to the optical fiber tensioning wheel located below the UV coating curing device 2, so as to obtain the tension value of the optical fiber 01 at the aforementioned optical fiber tensioning wheel in real time.

[0047] Any one of the primary exhaust gas adsorption devices 1 is connected to the adsorption port 11 having a narrow slot-shaped cross-section, and any adsorption port 11 is adjacent to the optical fiber 01 and extends in the same direction as the optical fiber 01. The air suction device 7 forms a negative pressure suction around the optical fiber 01 through the adsorption port 11, thereby absorbing the exhaust gas on the surface of the optical fiber 01 and the surrounding area, and the negative pressure suction generated by all the adsorption ports 11 on the optical fiber 01 maintains the circumferential force balance of the optical fiber 01, avoiding the shaking of the optical fiber 01 due to the optical fiber 01 being subjected to force only on one side or excessive force on one side.

[0048] The air suction device 7 can be realized by using a vacuum pump or other equipment. The adsorption port 11 can be connected to the air suction device 7 through a primary tail gas connection pipe 12 .

[0049] Any one of the primary exhaust gas adsorption devices 1 is connected to the air suction device 7 through the primary electric valve 5. All the primary electric valves 5 and the tension meter 3 are electrically connected to the controller 4, and the controller 4 adjusts the opening of all the primary electric valves 5 according to the tension meter 3, thereby adjusting the suction generated by all the adsorption ports 11. The controller 4 provided by the present invention realizes the feedback regulation of the primary exhaust gas adsorption device 1 in combination with the tension meter 3 and the primary electric valve 5. The regulating function of the controller 4 is mainly reflected in that when the tension value of the optical fiber 01 is large, the suction force of the primary exhaust gas adsorption device 1 is appropriately increased without causing the optical fiber 01 to shake; when the tension value of the optical fiber 01 is small, the suction force of the primary exhaust gas adsorption device 1 is reduced or the primary exhaust gas adsorption device 1 is closed to avoid affecting the normal operation of the optical fiber 01 due to the adsorption operation of the primary exhaust gas adsorption device 1.

[0050] In summary, the optical fiber exhaust gas extraction system provided by the present invention extracts exhaust gas from the surface and surrounding areas of the optical fiber 01 through a primary exhaust gas adsorption device 1, thereby achieving exhaust gas cleaning operations and avoiding contamination of the equipment below the UV coating curing device 2; in addition, suction is applied to the circumference of the optical fiber 01 and the circumferential force balance of the optical fiber 01 is maintained through the adsorption ports 11 of all the primary exhaust gas adsorption devices 1, and feedback adjustment of the suction force of the adsorption port 11 is achieved through the controller 4, the tension meter 3 and the primary electric valve 5, thereby flexibly adapting to optical fiber drawing processes under different working conditions and avoiding the exhaust gas extraction operation of the primary exhaust gas adsorption device 1 affecting the normal operation of the optical fiber 01.

[0051] The optical fiber exhaust gas extraction system provided by the present invention is further described below in conjunction with the accompanying drawings and implementation examples.

[0052] On the basis of the above-mentioned embodiments, the optical fiber exhaust gas extraction system provided by the present invention is provided with an even number of primary exhaust gas adsorption devices 1, and all adsorption ports 11 of all primary exhaust gas adsorption devices 1 are symmetrically arranged with the optical fiber 01 as the symmetry axis.

[0053] In this embodiment, any pair of relatively arranged suction ports 11 are at the same distance from the light, and the forces generated are equal in magnitude and opposite in direction. Therefore, the pulling forces exerted on the optical fiber 01 by the aforementioned pair of suction ports 11 offset each other, avoiding unilateral force on the optical fiber 01 due to exhaust gas extraction by the suction ports 11.

[0054] Of course, the number of primary exhaust gas adsorption devices 1 includes but is not limited to an even number. When the primary exhaust gas adsorption devices 1 are set to an odd number, all the primary exhaust gas adsorption devices 1 can still maintain the circumferential force balance of the optical fiber 01 by reasonably adjusting the force direction and force magnitude of any adsorption port 11.

[0055] The suction port 11 of the optical fiber exhaust extraction system provided by the present invention is of flat design, and the cross section of the suction port 11 is in the shape of a narrow and long slot, which is adapted to the extension path of the optical fiber 01 in normal operation. In a specific embodiment, the cross section of the suction port 11 is in the shape of a rectangular slot. In short, the suction port 11 of the optical fiber exhaust extraction system provided by the present invention can be regarded as a narrow and long linear structure, which is adjacent to and parallel to the linear optical fiber 01. The negative pressure generated by the suction port 11 is concentrated on the peripheral side of the optical fiber 01 along the extension direction of the optical fiber 01, and has a long coverage range, and can generate equal suction force to any part of the optical fiber 01 within the coverage range, which is beneficial to maintain the circumferential force balance of the optical fiber 01 and ensure that the exhaust gas extraction efficiency at various parts of the optical fiber 01 is similar.

[0056] The optical fiber exhaust gas extraction system provided by the present invention is provided with a secondary exhaust gas adsorption device 2 installed below the UV coating curing device 2 in addition to the primary exhaust gas adsorption device 1 .

[0057] The secondary exhaust gas adsorption device 2 has a cylindrical adsorption port for sleeve optical fiber 01 to absorb the exhaust gas of optical fiber 01 and maintain the balance of the circumferential force system of optical fiber 01. Compared with the primary exhaust gas adsorption device 1 which requires two or more combined use, the cylindrical adsorption port of the secondary exhaust gas adsorption device 2 is set in the middle, and the optical fiber 01 passes through the secondary exhaust gas adsorption device 2 from the cylindrical adsorption port. Therefore, compared with the primary exhaust gas adsorption device 1 covering the optical fiber 01 along the extension direction of the optical fiber 01, the secondary exhaust gas adsorption device 2 forms a 360° coverage area around the circumference of the optical fiber 01.

[0058] It can be seen that the primary exhaust gas adsorption device 1 focuses on adsorbing the exhaust gas attached to the surface of the optical fiber 01, and the suction force generated is large and concentrated; the secondary exhaust gas adsorption device 2 takes into account the adsorption of the exhaust gas around the optical fiber 01 and the exhaust gas attached to the surface of the optical fiber 01, and the suction force is limited due to the wide suction range. Therefore, this embodiment combines the primary exhaust gas adsorption device 1 and the secondary exhaust gas adsorption device 2, thereby integrating the advantages of the two.

[0059] Of course, in this embodiment, according to the actual tension value of the optical fiber 01 in normal operation, the primary exhaust gas adsorption device 1 and the secondary exhaust gas adsorption device 2 are not opened and closed synchronously. For example, when the tension value of the optical fiber 01 is small, opening the primary exhaust gas adsorption device 1 may cause the optical fiber 01 to be subjected to excessive suction force. Although the adsorption ports 11 of multiple primary exhaust gas adsorption devices 1 surround the circumference of the optical fiber 01 and apply a balanced force to the optical fiber 01, it may still cause the optical fiber 01 to shake. For this reason, when the tension value of the optical fiber 01 is small, only the secondary exhaust gas adsorption device 2 can be opened.

[0060] In order to conveniently adjust the suction force of the secondary exhaust gas adsorption device 2, the secondary exhaust gas adsorption device 2 is connected to the air intake device 7 through the secondary electric valve 6. The secondary electric valve 6 is electrically connected to the controller 4, and the controller 4 adjusts the opening of the secondary electric valve 6 according to the tension meter 3.

[0061] Regardless of whether the primary electric valve 5 and the secondary electric valve 6 used in the present invention are specifically ball valves or diaphragm valves, the opening of the valves is expressed in percentage. For example, when the primary electric valve 5 is closed, the opening of the primary electric valve 5 is 0; when the primary electric valve 5 is fully opened, the opening of the primary electric valve 5 is 100%, so the opening range of the primary electric valve 5 is between 0 and 1. For the specific adjustment method of the controller 4 on the primary exhaust gas adsorption device 1 and the secondary exhaust gas adsorption device 2, please refer to the various embodiments of the optical fiber exhaust gas extraction method recorded later in this application document.

[0062] For better technical effect, in the optical fiber exhaust gas extraction system provided by the present invention, the secondary exhaust gas adsorption device 2 is located below the primary exhaust gas adsorption device 1. The primary exhaust gas adsorption device 1 and the secondary exhaust gas adsorption device 2 are both located between the UV coating curing device 2 and the optical fiber production equipment below the UV coating curing device 2.

[0063] For the secondary exhaust gas adsorption device 2, in order to make the force applied to the optical fiber 01 by the cylindrical adsorption port sleeved on the optical fiber 01 maintain the circumferential force balance of the optical fiber 01, the outer periphery of the secondary exhaust gas adsorption device 2 is provided with a plurality of secondary exhaust gas connecting pipes 23 distributed symmetrically or in a circular array in the same radial plane, and the air intake device 7 is connected to all the secondary exhaust gas connecting pipes 23.

[0064] When the air intake device 7 is connected to the secondary exhaust gas adsorption device 2 through the secondary exhaust gas connecting pipe 23, equal negative pressure is generated in all the secondary exhaust gas connecting pipes 23, so the forces generated by all the secondary exhaust gas connecting pipes 23 in the same radial plane of the optical fiber 01 constitute a balanced force system.

[0065] In the optical fiber exhaust gas extraction system provided by the present invention, for the convenience of cleaning, the suction port 11 of any one of the primary exhaust gas adsorption devices 1 is open to the outside, so that the staff can easily and quickly clean the suction port 11 of the primary exhaust gas adsorption device 1. Correspondingly, in order to simplify the cleaning operation of the secondary exhaust gas adsorption device 2, in each embodiment provided by the present invention, the secondary exhaust gas adsorption device 2 includes at least two cavity plates 21 for surrounding and splicing the circumference of the optical fiber 01.

[0066] All cavity plates 21 can be spliced ​​and assembled to form a cylindrical adsorption port around the optical fiber 01. Of course, the shape of the cylindrical adsorption port includes but is not limited to a cylindrical shape, and can also be set to a prism, a truncated cone or other special rotational body shapes.

[0067] Further, on the basis of the above embodiment, the secondary exhaust gas adsorption device 2 includes two semi-cylindrical cavity plates 21. One pair of adjacent sides of the two cavity plates 21 is hinged, and the other cavity plate 21 is flipped relative to one cavity plate 21, so that when the two cavity plates 21 move back to back, the cylindrical adsorption port in the middle of the secondary exhaust gas adsorption device 2 is opened, which facilitates the separation of the secondary exhaust gas adsorption device 2 and the optical fiber 01, and simplifies the cleaning of the cylindrical adsorption port.

[0068] In the above embodiment, another pair of adjacent sides of the two cavity plates 21 may be provided with fixed connectors, so as to achieve fixed connection when the two cavity plates 21 are brought closer together. The fixed connection methods of the two cavity plates 21 include but are not limited to fastener locking, magnetic adsorption, buckling, etc. Figure 3 Taking the secondary exhaust gas adsorption device 2 shown as an example, adjacent sides of the two cavity plates 21 are respectively provided with buckles 22. When the two cavity plates 21 are flipped over to move toward each other, the two buckles 22 are engaged with each other to achieve a fixed connection.

[0069] In order to improve the sealing performance of the secondary exhaust gas adsorption device 2 on the wire drawing line, a fiber hole 24 for the optical fiber 01 to pass through is respectively provided at the midpoint of the upper end surface 201 and the midpoint of the lower end surface of the secondary exhaust gas adsorption device 2, and the radial dimension of the fiber hole 24 is much smaller than the radial dimension of the cylindrical adsorption port. Obviously, the size of the fiber hole 24 is larger than the size of the optical fiber 01.

[0070] According to the above configuration, the area outside the fiber hole 24 of the secondary exhaust gas adsorption device 2 is isolated from the outside, and the optical fiber 01 entering the secondary exhaust gas adsorption device 2 is effectively isolated inside the secondary exhaust gas adsorption device 2, thereby improving the exhaust gas recovery efficiency.

[0071] The present invention also provides an optical fiber exhaust gas extraction method, which is applied to the above optical fiber exhaust gas extraction system, comprising:

[0072] S1: Obtain the tension value of the optical fiber 01 below the UV coating curing device 2;

[0073] S2: adjusting the suction force of the primary exhaust gas adsorption device 1 and the secondary exhaust gas adsorption device 2 according to the tension value.

[0074] Among them, step S1 and step S2 can be completed manually. For example, the tension value of the optical fiber 01 at any time is manually read using the tension meter 3 connected to the optical fiber 01, and then the suction force of the primary exhaust gas adsorption device 1 and the suction force of the secondary exhaust gas adsorption device 2 are manually adjusted, for example, by adjusting the power and flow rate of the suction equipment connected to the primary exhaust gas adsorption device 1 and the secondary exhaust gas adsorption device 2 to achieve the adjustment of the suction force.

[0075] Step S1 and step S2 can also be automatically controlled by the controller 4 connected to the primary exhaust gas adsorption device 1 and the secondary exhaust gas adsorption device 2. For example, the tension meter 3 connected to the optical fiber 01 is electrically connected to the controller 4 to provide the controller 4 with the tension value of the optical fiber 01 in normal operation in real time; the controller 4 is connected to the primary exhaust gas adsorption device 1 and the secondary exhaust gas adsorption device 2 through the primary electric valve 5 and the secondary electric valve 6, respectively, so as to automatically adjust the opening of the primary electric valve 5 and the opening of the secondary electric valve 6 according to the tension value detected by the tension meter 3, so as to achieve the suction adjustment of the primary exhaust gas adsorption device 1 and the suction adjustment of the secondary exhaust gas adsorption device 2.

[0076] Based on the above embodiments, the present invention provides a specific adjustment method.

[0077] Wherein, before step S1, the method further includes:

[0078] S01: Adjust the opening of the primary electric valve 5 connected to the primary exhaust gas adsorption device 1 to 0%; adjust the opening of the secondary electric valve 6 connected to the secondary exhaust gas adsorption device 2 to 10%;

[0079] Step S2 specifically includes:

[0080] S21: Determine whether the tension value is greater than the preset value F1; if not, return to step S01; if yes, proceed to step S22;

[0081] S22: adjusting the opening of the primary electric valve 5 to a first opening; adjusting the opening of the secondary electric valve 6 to a second opening;

[0082] in,

[0083] φ1={(F-F1) / (F2-F1)}×100%;

[0084] φ2={0.9(F-F1) / (F2-F1)+0.1}×100%;

[0085] φ1 is the first opening; φ2 is the second opening; F is the tension value; F2 is the maximum tension value of the optical fiber 01 in the drawing state.

[0086] In simple terms, this embodiment adjusts the opening of the primary electric valve 5 and the opening of the secondary electric valve 6 according to the maximum tension value of the optical fiber 01 in the drawing state and the actual tension value of the optical fiber 01. The above two opening calculation formulas use the preset value F1 as the critical parameter of the tension of the optical fiber 01. When the tension of the optical fiber 01 is lower than or equal to this critical parameter, the opening of the primary electric valve 5 is not greater than 0, which is equivalent to the closing of the primary exhaust gas adsorption device 1; the opening of the secondary electric valve 6 is not greater than 10%, which is equivalent to the tension value of the secondary exhaust gas adsorption device 2 being not greater than one tenth of its maximum tension value. When the tension of the optical fiber 01 is greater than this critical parameter, the primary electric valve 5 and the secondary electric valve 6 are both opened, which is equivalent to the primary exhaust gas adsorption device 1 and the secondary exhaust gas adsorption device 2 participating in the exhaust gas extraction operation of the optical fiber 01 at the same time, and the suction force of the primary exhaust gas adsorption device 1 and the suction force of the secondary exhaust gas adsorption device 2 are positively correlated with the tension value of the optical fiber 01.

[0087] The optical fiber exhaust gas extraction system and the optical fiber exhaust gas extraction method provided by the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An optical fiber exhaust gas extraction system, characterized in that: It comprises a tension meter (3) for connecting and obtaining the tension of an optical fiber (01), and at least two primary exhaust gas adsorption devices (1) for being installed below a UV coating curing device (02); Any one of the primary exhaust gas adsorption devices (1) has an adsorption port (11) with a cross-section in the shape of a narrow slot; any one of the adsorption ports (11) is adjacent to the optical fiber (01) and extends in the same direction as the optical fiber (01); all of the adsorption ports (11) are used to surround the circumference of the optical fiber (01) to absorb the exhaust gas of the optical fiber (01) and maintain the balance of the circumferential force system of the optical fiber (01); Any of the primary exhaust gas adsorption devices (1) is connected to the air intake device (7) via a primary electric valve (5); all of the primary electric valves (5) and the tension meter (3) are electrically connected to a controller (4); the controller (4) adjusts the opening of all of the primary electric valves (5) according to the tension meter (3); Also included is a secondary exhaust gas adsorption device (2) for installation below the UV coating curing device (02); the secondary exhaust gas adsorption device (2) has a cylindrical adsorption port for sleeve-mounting the optical fiber (01) to absorb the exhaust gas of the optical fiber (01) and maintain the balance of the circumferential force system of the optical fiber (01); The secondary exhaust gas adsorption device (2) is connected to the air intake device (7) via a secondary electric valve (6); the secondary electric valve (6) is electrically connected to the controller (4); the controller (4) adjusts the opening of the secondary electric valve (6) according to the tension meter (3); the adsorption port (11) is connected to the air intake device (7) via a primary exhaust gas connecting pipe (12).

2. The optical fiber exhaust gas extraction system according to claim 1, characterized in that: The number of all the primary exhaust gas adsorption devices (1) is an even number, and all the adsorption ports (11) are symmetrically arranged with the optical fiber (01) as a symmetry axis.

3. The optical fiber exhaust gas extraction system according to claim 1, characterized in that: The cross section of any one of the adsorption ports (11) is in the shape of a rectangular groove.

4. The optical fiber exhaust gas extraction system according to claim 1, characterized in that: The secondary exhaust gas adsorption device (2) is located below the primary exhaust gas adsorption device (1).

5. The optical fiber exhaust gas extraction system according to claim 1, characterized in that: The outer periphery of the secondary exhaust gas adsorption device (2) is provided with a plurality of secondary exhaust gas connection pipes (23) distributed symmetrically or in an annular array in the same radial plane; the air intake device (7) is connected to all of the secondary exhaust gas connection pipes (23).

6. The optical fiber exhaust gas extraction system according to claim 1, characterized in that: The secondary exhaust gas adsorption device (2) comprises at least two cavity plates (21) for surrounding and splicing the circumference of the optical fiber (01).

7. The optical fiber exhaust gas extraction system according to claim 6, characterized in that: The secondary exhaust gas adsorption device (2) comprises two semi-cylindrical cavity plates (21); one pair of adjacent side edges of the two cavity plates (21) are hinged; and the other pair of adjacent side edges of the two cavity plates (21) are connected via buckles (22); The center of the upper end surface and the center of the lower end surface of the secondary exhaust gas adsorption device (2) are respectively provided with fiber penetration holes (24) for allowing the optical fiber (01) to pass straight through.

8. An optical fiber exhaust gas extraction method, applied to the optical fiber exhaust gas extraction system according to any one of claims 4 to 7, characterized in that: include: S1: Obtaining the tension value of the optical fiber (01) below the UV coating curing device (02); S2: adjusting the suction force of the primary exhaust gas adsorption device (1) and the suction force of the secondary exhaust gas adsorption device (2) according to the tension value.

9. The optical fiber exhaust gas extraction method according to claim 8, characterized in that: Before step S1, the following steps are also included: S01: adjusting the opening of the primary electric valve (5) connected to the primary exhaust gas adsorption device (1) to 0; adjusting the opening of the secondary electric valve (6) connected to the secondary exhaust gas adsorption device (2) to 10%; The step S2 specifically includes: S21: Determine whether the tension value is greater than a preset value F1; if not, return to step S01; if yes, proceed to step S22; S22: adjusting the opening of the primary electric valve (5) to a first opening; adjusting the opening of the secondary electric valve (6) to a second opening; in, φ1={(F-F1) / (F2-F1)}×100%; φ2={0.9(F-F1) / (F2-F1)+0.1}×100%; φ1 is the first opening; φ2 is the second opening; F is the tension value; and F2 is the maximum tension value of the optical fiber (01) in a drawing state.

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