CN110950529A - Elastic air sealing device of wire drawing furnace, air sealing structure and air sealing method - Google Patents
Elastic air sealing device of wire drawing furnace, air sealing structure and air sealing method Download PDFInfo
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- CN110950529A CN110950529A CN201911083594.6A CN201911083594A CN110950529A CN 110950529 A CN110950529 A CN 110950529A CN 201911083594 A CN201911083594 A CN 201911083594A CN 110950529 A CN110950529 A CN 110950529A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/029—Furnaces therefor
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Abstract
The invention relates to an elastic gas sealing device of a wire drawing furnace, a gas sealing structure and a gas sealing method, wherein the elastic gas sealing device of the wire drawing furnace comprises a gas sealing shell with two ports, a cylindrical flexible pad material and a gas sealing movable mechanism, the cylindrical flexible pad material is positioned in the gas sealing shell, the peripheral wall with an opening at one end is movably connected with the end wall at one end of the gas sealing shell, the end wall at the other end is abutted against the end wall at the other end of the gas sealing shell, so that a penetrating cavity with a port shared with the gas sealing shell is formed in the gas sealing shell, and the gas sealing movable mechanism is used for applying pressure to the periphery of the cylindrical flexible pad material to tighten the penetrating cavity. The air sealing structure comprises a wire drawing furnace, an elastic air sealing device of the wire drawing furnace and an optical fiber perform, and the air sealing method comprises the step of carrying out air sealing on the wire drawing furnace by using the elastic air sealing device of the wire drawing furnace. The invention enhances the sealing performance of the wire drawing furnace, avoids the phenomenon of blow-by oxidation caused by the diameter change of the prefabricated rod and prolongs the service life of the graphite piece in the wire drawing furnace.
Description
Technical Field
The invention relates to the technical field of optical fiber manufacturing, in particular to an elastic gas seal device of a wire drawing furnace, a gas seal structure and a gas seal method.
Background
The drawing furnace is an extremely important functional device in optical fiber drawing, and can heat an optical fiber preform, melt the optical fiber preform in the drawing furnace, and form an optical fiber with a diameter in the range of 125 +/-1 μm under certain drawing conditions. The elastic gas seal device of the drawing furnace has the function of preventing air from entering the drawing furnace when the optical fiber perform is drawn to cause oxidation of a graphite piece in the furnace, thereby shortening the service life of the graphite piece.
As the technology advances, the optical fiber preform has improved greatly in diameter uniformity, but the variation of the diameter of the optical fiber preform still exists. In the wire drawing process, when the traditional elastic air seal device of the wire drawing furnace faces uneven diameter of a rod body, the air seal needs to be manually checked and processed, so that the quality of optical fibers is affected, and the danger of manual operation is increased. The existing new technology realizes the sealing effect through gas sealing, but the technology needs to greatly reform the traditional wire drawing furnace, and the use of gas also increases the production cost.
Disclosure of Invention
The invention aims to solve the problems and provides an elastic gas sealing device, a gas sealing structure and a gas sealing method for a wire drawing furnace.
According to one aspect of the invention, an elastic air sealing device of a wire drawing furnace is provided, which comprises an air sealing shell with openings at two ends, a cylindrical flexible pad material and an air sealing movable mechanism, wherein the cylindrical flexible pad material is positioned inside the air sealing shell, the peripheral wall with an opening at one end is movably connected with the end wall of one end of the air sealing shell, the end wall of the other end is abutted against the end wall of the other end of the air sealing shell, so that a through cavity sharing a port with the air sealing shell is formed inside the air sealing shell, and the air sealing movable mechanism is used for applying pressure to the periphery of the cylindrical flexible pad material to tighten the through cavity.
The air seal moving mechanism comprises a plurality of air seal moving pressing units penetrating through the side wall of the air seal barrel part, and the plurality of air seal moving pressing units are distributed around the side wall of the air seal barrel part.
Wherein, the atmoseal activity compresses tightly the unit and includes movable connecting rod, briquetting, stopper and spring, and movable connecting rod runs through the lateral wall of atmoseal barrel spare, and briquetting and stopper all are fixed with movable connecting rod, and movable connecting rod is located to the spring housing, and its both ends are fixed with stopper and atmoseal barrel spare respectively, and the spring promotes movable connecting rod and stopper through deformation and moves to a section of thick bamboo center.
The gas seal movable pressing unit further comprises a limiting rod, the limiting rod is fixed at a position, close to the movable connecting rod, of the gas seal barrel, the movable connecting rod enables the limiting block to be abutted to the limiting rod through rotation, and therefore the pressing block is located at a position separated from the cylindrical flexible cushion material.
Wherein, the lateral wall of atmoseal barrel spare is equipped with a plurality of through-holes, and a plurality of atmoseal activity compress tightly the unit and pass a plurality of through-holes through the atmoseal barrel spare through the one-to-one, and a plurality of through-holes are equipped with T shape sealing washer.
The air seal shell comprises an air seal pressing ring, an air seal barrel part and an air seal supporting ring, the air seal supporting ring and the air seal pressing ring are hermetically buckled on ports at two ends of the air seal barrel part, one end of the cylindrical flexible pad material is clamped between the air seal pressing ring and the air seal barrel part, and the other end of the cylindrical flexible pad material is abutted to the wall surface of the air seal supporting ring.
The section of the air seal pressure ring is T-shaped, the outer wall of the narrow end of the air seal pressure ring is attached to the inner wall of one end of the air seal cylinder, the other end of the air seal cylinder is provided with a clamping groove, the air seal support ring is bowl-shaped, and the side wall of the air seal support ring is inserted into the clamping groove.
The air seal pressing ring, the air seal barrel part, the air seal supporting ring and the cylindrical flexible pad material are all made of quartz materials.
Wherein, the number of the air seal moving mechanisms is 8.
According to a second aspect of the invention, a gas seal structure of a drawing furnace is provided, which comprises the drawing furnace, an elastic gas seal device of the drawing furnace and an optical fiber perform, wherein the elastic gas seal device of the drawing furnace is arranged at the top of the drawing furnace, openings at two ends of the elastic gas seal device are aligned with a furnace mouth of the drawing furnace, the optical fiber perform passes through the elastic gas seal device of the drawing furnace and enters the drawing furnace, and a seal is formed among the elastic gas seal device of the drawing furnace, the optical fiber perform and the drawing furnace.
According to a third aspect of the present invention, there is provided a wire drawing furnace gas sealing method comprising the steps of:
the elastic gas seal device of the wire drawing furnace is arranged at the furnace mouth of the wire drawing furnace top, so that the openings at the two ends of the elastic gas seal device are aligned with the furnace mouth of the wire drawing furnace.
And (3) removing the cylindrical flexible mat material, enabling the optical fiber perform to enter the elastic gas seal device of the drawing furnace, and judging the centering condition of the optical fiber perform according to the comparison of the outward moving distance of the gas seal moving mechanism.
And adjusting the position of the optical fiber perform to make the optical fiber perform align to the central line of the elastic gas seal device of the drawing furnace.
And limiting the gas seal movable mechanism at a position far away from the center of the gas seal shell, and lifting the optical fiber preform.
And a cylindrical flexible mat material is arranged in the gas seal shell, so that the optical fiber perform enters the elastic gas seal device of the wire drawing furnace from the adjusted position again, and the gas seal movable mechanism is loosened to extrude the cylindrical flexible mat material towards the center, so that the cylindrical flexible mat material is attached to the optical fiber perform to realize gas seal.
The invention has the following advantages:
1. the elastic gas sealing device of the wire drawing furnace is suitable for optical fiber preforms with various diameters, is suitable for single optical fiber preform with uneven diameter, and has a wide application range.
2. The elastic gas seal device and the gas seal structure of the wire drawing furnace improve the gas seal tightness of the wire drawing furnace, avoid the phenomenon of gas blowby oxidation caused by the diameter change of the prefabricated rod, prolong the service life of a graphite piece in the wire drawing furnace and reduce the production cost.
3. The elastic gas seal device of the wire drawing furnace can play a role in assisting centering of the prefabricated rod in the wire drawing preparation process; in the wire drawing process, the tension applied to the periphery of the prefabricated rod in each direction is balanced, the position of the prefabricated rod is not easy to deviate, parameters such as the roundness, the concentricity and the polarization mode dispersion of the optical fiber are improved, and the quality of the optical fiber is improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 shows a schematic view of a draw furnace elastomeric gas seal apparatus according to an embodiment of the present invention;
FIG. 2 shows a top view of a draw furnace elastomeric gas seal apparatus according to an embodiment of the present invention;
fig. 3 shows a schematic diagram of a wire drawing furnace gas seal structure according to an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below according to examples. While exemplary embodiments of the present disclosure have been shown in the specification, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1-2, an elastic air sealing device for a wire drawing furnace comprises an air sealing shell 1 with openings at two ends, a cylindrical flexible pad material 2 and an air sealing movable mechanism, wherein the cylindrical flexible pad material 2 is positioned inside the air sealing shell 1, the end wall of one end of the cylindrical flexible pad material is movably connected with the end wall of one end of the air sealing shell 1, the end wall of the other end of the cylindrical flexible pad material is abutted against the end wall of the other end of the air sealing shell 1, so that a through cavity is formed inside the air sealing shell 1, the through cavity and the air sealing shell 1 share the opening at the end, and the air sealing movable mechanism is used for applying pressure to the periphery of the cylindrical flexible pad material 2 to tighten. In the present invention, the tubular flexible mat 2 may be a sheet-like flexible mat rolled into a tubular structure or an existing tubular structure.
The air seal moving mechanism comprises a plurality of air seal moving pressing units penetrating through the side wall of the air seal barrel part 2, and the plurality of air seal moving pressing units are distributed around the side wall of the air seal barrel part 2.
The gas seal movable pressing unit comprises a movable connecting rod 310, a pressing block 320, a limiting block 330 and a spring 340, the movable connecting rod 310 penetrates through the side wall of the gas seal shell 1, the pressing block 320 and the limiting block 330 are both fixed with the movable connecting rod 310, the spring is sleeved on the movable connecting rod 310, two ends of the spring are respectively fixed with the limiting block 330 and the gas seal shell 1, and the spring 340 pushes the movable connecting rod 310 and the limiting block 330 to move towards the center of the cylinder through deformation.
In embodiment 1, the pressing piece 320 is fixed to one end of the movable link 310 located inside the housing, and the stopper 330 is located at one end of the movable link 310 located outside the housing. The spring 340 is an extension spring, one end of which is fixedly connected with the limiting block 330, and the other end of which is fixedly connected with the outer wall of the airtight housing 1. When the spring 340 changes from the normal state to the stretched state, the pressing block 320 is pushed to a position close to the central axis of the airtight housing 1, and the cylindrical flexible pad material is pressed.
In embodiment 2, the pressing block 320 and the limiting block 330 are both located on the portion of the movable link 310 located inside the housing, and the limiting block 330 is located between the pressing block 320 and the airtight housing 1. The spring 340 is a compression spring, one end of which is fixedly connected with the limiting block 330, and the other end is fixedly connected with the inner wall of the air seal housing. When the spring 340 changes from the contraction state to the normal state, the pressing block 320 is pushed to a position close to the central axis of the airtight shell 1, and the cylindrical flexible pad material is pressed.
The gas seal movable pressing unit further comprises a limiting rod 350, the limiting rod is fixed at a position, close to the movable connecting rod 310, of the gas seal shell 1, the position of the limiting block 330 is changed through rotation of the movable connecting rod 310, the limiting block 330 is abutted to the limiting rod 350, and therefore the pressing block 320 is located at a position separated from the cylindrical flexible pad material 2.
In embodiment 1, the limiting rod 350 is fixedly arranged on the sidewall of the airtight housing 1 along the radial direction, the orientation of the end of the limiting block 330 is changed by rotating the movable connecting rod 310, when the end of the limiting block 330 rotates to the position of the limiting rod 350, the end of the limiting rod 350 just can abut against the fiber block 330, the spring is stretched, and the pressing block 320 is limited at the position separated from the cylindrical flexible pad material 2.
In embodiment 2, the limiting rod 350 includes a cross rod arranged radially and a vertical rod arranged perpendicular to the cross rod, and the cross rod is used for fixedly connecting the vertical rod and the airtight housing 1. When the end of the stopper 330 is rotated to a position where it meets the cross bar, the spring is contracted, and the press block 320 is restricted to a position where it is separated from the cylindrical flexible mat 2.
In addition, in embodiment 1 and embodiment 2, the movable connecting rod 310 is fixedly connected to the pressing block 320 and integrally formed, and the tail end of the movable connecting rod 310 is in a threaded shape and is in threaded connection with the limiting block 330. The limiting block 330 can be a cuboid, the surface of which is provided with a non-penetrating threaded hole for the connection of the movable connecting rod, and the hole position of the threaded hole enables the limiting block to be divided into two parts with the length of 2: 1. The distance between the stopper bar 350 and the movable link 310 may also be set to be less than 2/3 stopper length and greater than 1/3 stopper length. When the short part of the limiting block is positioned above, the movable connecting rod can move freely; when the limiting block rotates 180 degrees0And then the limiting block can be propped by the limiting rod.
The lateral wall of atmoseal shell 1 is equipped with 8 through-holes, and 8 atmoseal activity compress tightly the unit and pass 8 through-holes through the atmoseal shell 1 through the one-to-one, is equipped with T shape tetrafluoroethylene sealing washer in the through-hole and seals.
The air seal shell 1 comprises an air seal pressure ring 110, an air seal barrel piece 120 and an air seal support ring 130, wherein the air seal support ring 130 is in a bowl shape, a clamping groove is arranged below the air seal barrel piece 120 and can be tightly combined with a quartz bowl, the air seal pressure ring 110 is a T-shaped circular ring and can be tightly combined with the other port of the air seal barrel piece, and specifically, the outer wall of the narrow end of the air seal pressure ring is tightly attached to the inner wall of the other port of the air seal barrel piece 120. The air seal press ring 110, the air seal cylinder piece 120, the air seal support ring 130 and the cylindrical flexible pad material 2 are all made of quartz, wherein the cylindrical flexible pad material 2 can be a quartz cotton sheet.
The utility model provides a wire drawing furnace gas seal structure, includes wire drawing furnace 6, wire drawing furnace elasticity atmoseal device and optical fiber perform 5, and wire drawing furnace 6 is used for heating melting optical fiber perform 5, and the equipment of wire drawing furnace gas seal structure is shown in figure 3, and the top fire door of wire drawing furnace 6 is equipped with elasticity atmoseal device. The quartz support ring 130 of the elastic air sealing device is arranged above the furnace opening of the wire drawing furnace 6, the air sealing cylinder 120 is arranged above the air sealing support ring 130, and the air sealing pressure ring 110 is arranged above the air sealing cylinder 120.
In the process of wire drawing preparation, the optical fiber perform 5 enters the elastic gas seal device without installing the quartz wool 2, the press block 320 is directly contacted with the optical fiber perform 5, and whether the optical fiber perform 5 is positioned in the middle of the furnace mouth of the wire drawing furnace 6 can be judged according to the length of the movable connecting rod 310 exposed outside the quartz cylinder 120.
After the optical fiber preform 5 is centered, the embodiment 1 is taken as an operation example object, the limiting block 330 is pulled outwards to exceed the limiting rod 350, and then the limiting block is rotated 180 degrees0The long part of the limiting block 330 can be pushed to the tail end of the limiting rod 350 to lift the optical fiber perform 5, the quartz press ring 110 is taken down, the quartz wool 2 is uniformly arranged inside the quartz cylinder 120, and the quartz wool 2 is required to be left above the optical fiber perform 5 for being pressed by the quartz press ring 110 during installation, so that the optical fiber perform 5 can be prevented from bringing the quartz wool 2 into the wire drawing furnace 6 in the rod feeding process. The quartz wool must be contacted below the quartz support ring 130 to achieve an integral seal. After the quartz press ring 110 is installed, the optical fiber preform rod enters the elastic gas sealing device again, and the limiting block 330 is rotated by 180 degrees0And then loosening, and driving a movable device to extrude the quartz wool 2 to be tightly attached to the optical fiber perform 5 inwards through the extension spring 340 to realize the air sealing effect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The elastic gas sealing device of the wire drawing furnace is characterized by comprising a gas sealing shell (1) with two ports, a cylindrical flexible pad material (2) and a gas sealing movable mechanism, wherein the cylindrical flexible pad material (2) is positioned in the gas sealing shell (1), the end wall of one end of the cylindrical flexible pad material is movably connected with the end wall of one end of the gas sealing shell (1), the end wall of the other end of the cylindrical flexible pad material is abutted against the end wall of the other end of the gas sealing shell (1), so that a through cavity sharing the ports with the cylindrical flexible pad material is formed in the gas sealing shell (1), and the gas sealing movable mechanism is used for applying pressure to the periphery of the cylindrical flexible pad material (2) to tighten the through cavity.
2. The elastic gas seal device of a drawing furnace according to claim 1,
the air seal moving mechanism comprises a plurality of air seal moving pressing units penetrating through the side wall of the air seal shell (1), and the plurality of air seal moving pressing units are distributed around the side wall of the air seal shell (1).
3. The elastic gas seal device of a drawing furnace according to claim 2,
the gas seal activity compresses tightly the unit and includes movable connecting rod (310), briquetting (320), stopper (330) and spring (340), movable connecting rod (310) run through the lateral wall of gas seal barrel spare (2), briquetting (320) with stopper (330) all are fixed with movable connecting rod (310), spring (340) cover is located movable connecting rod (310), its both ends respectively with stopper (330) with gas seal barrel spare (2) are connected, spring (340) promote through deformation movable connecting rod (310) and stopper (330) move to the shell center.
4. The elastic gas seal device of a drawing furnace according to claim 3,
the air seal movable pressing unit further comprises a limiting rod (350), the limiting rod is fixed at the position, close to the movable connecting rod (310), of the air seal shell (1), the movable connecting rod (310) changes the pointing direction of the tail end of the limiting block (330) through rotation, the limiting block (330) is abutted to the limiting rod (350), and therefore the pressing block (320) is located at the position separated from the cylindrical flexible pad material (2).
5. The elastic gas seal device of a drawing furnace according to claim 2,
the side wall of the air seal shell (1) is provided with a plurality of through holes, the air seal movable pressing units penetrate through the through holes in a one-to-one correspondence mode and penetrate through the air seal shell (1), and T-shaped sealing rings are installed in the through holes.
6. The elastic gas seal device of a drawing furnace according to claim 1,
the air seal shell (1) comprises an air seal pressing ring (110), an air seal barrel part (120) and an air seal supporting ring (130), the air seal supporting ring (130) is buckled with the air seal pressing ring (110) in a sealing mode, ports at two ends of the air seal barrel part (120), one end of the cylindrical flexible pad material (2) is clamped and arranged between the air seal pressing ring (110) and the air seal barrel part (120), and the other end of the cylindrical flexible pad material is abutted to the wall face of the air seal supporting ring (130).
7. The elastic gas seal device of a drawing furnace according to claim 6,
the section of the air seal pressure ring (110) is T-shaped, the outer wall of the narrow end of the air seal pressure ring is attached to the inner wall of one end of the air seal cylinder piece (120), the other end of the air seal cylinder piece (120) is provided with a clamping groove, the air seal support ring (130) is bowl-shaped, and the side wall of the air seal support ring is inserted into the clamping groove;
the gas seal pressing ring (110), the gas seal barrel piece (120), the gas seal supporting ring (130) and the cylindrical flexible pad material (2) are all made of quartz materials.
8. The elastic gas seal device of a drawing furnace according to claim 2,
the number of the air seal moving mechanisms is 8.
9. A drawing furnace gas seal structure, characterized by comprising a drawing furnace (6), a drawing furnace elastic gas seal device according to any one of claims 1 to 8 and an optical fiber preform (5), wherein the drawing furnace elastic gas seal device is arranged at the top of the drawing furnace (6), openings at two ends of the drawing furnace elastic gas seal device are aligned with a furnace mouth of the drawing furnace (6), the optical fiber preform (5) passes through the drawing furnace elastic gas seal device to enter the drawing furnace (6), and a seal is formed among the drawing furnace elastic gas seal device, the optical fiber preform (5) and the drawing furnace (6).
10. The wire drawing furnace gas sealing method is characterized by comprising the following steps:
placing the elastic gas sealing device of the drawing furnace according to claim 1 at a furnace mouth of a drawing furnace top, so that openings at two ends of the elastic gas sealing device are aligned with the furnace mouth of the drawing furnace;
the cylindrical flexible mat (2) is dismantled, the optical fiber perform enters the elastic gas seal device of the wire drawing furnace, and the centering condition of the optical fiber perform is judged according to the comparison of the outward moving distance of the gas seal moving mechanism;
adjusting the position of the optical fiber perform to enable the optical fiber perform to be aligned to the central line of the elastic gas seal device of the wire drawing furnace;
limiting the gas seal movable mechanism to a position far away from the center of the gas seal shell (1) and lifting the optical fiber preform rod;
and the cylindrical flexible mat material (2) is arranged in the gas seal shell (1), so that the optical fiber perform enters the elastic gas seal device of the wire drawing furnace from the adjusted position again, the gas seal movable mechanism is loosened, the cylindrical flexible mat material (2) is extruded towards the center, and the cylindrical flexible mat material (2) is attached to the optical fiber perform to realize gas seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911083594.6A CN110950529B (en) | 2019-11-07 | 2019-11-07 | Elastic air sealing device of wire drawing furnace, air sealing structure and air sealing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911083594.6A CN110950529B (en) | 2019-11-07 | 2019-11-07 | Elastic air sealing device of wire drawing furnace, air sealing structure and air sealing method |
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| CN110950529A true CN110950529A (en) | 2020-04-03 |
| CN110950529B CN110950529B (en) | 2022-05-03 |
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