An optical fiber preform sleeve welding purge gas connection device
An optical fiber preform, purging gas technology, applied in the direction of adjustable connection, pipe/pipe joint/pipe fitting, passing element, etc., can solve the problems of impurities, poor rotation, air leakage, etc., to ensure quality and air tightness Good, the effect of improving the service life
Active Publication Date: 2018-01-23
JIANGSU HENGTONG PHOTOELECTRIC
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Problems solved by technology
[0005] In view of the above problems, the present invention provides a purge gas connection device for optical fiber preform casing welding, which solves the problems of gas leakage, impurities caused by friction, and poor rotation during gas introduction, and has high temperature resistance. Ensure the quality of optical fiber preform
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[0021] An optical fiber preform sleeve welding purge gas connection device, see Figure 1 ~ Figure 4 : It includes rotating positioning structures 1 arranged in pairs, one end of the two sleeves 2 to be welded is respectively sleeved on the silicone sleeve 3 of the rotating positioning structure 1 at the corresponding position, and the other ends of the two sleeves 2 to be welded face each other Arranged and welded by a welding device 4, each rotary positioning structure 1 includes a silicone sleeve 3, a vertebral body 5, a hollow shaft 6, a ferrule base 7, a first ferrule 8, a second ferrule 9, a nut 10, and a hollow One end of the ferrule base 7 is set outside the inner end of the shaft 6, and the ferrule base 7 is sleeved on the outside of the inner end of the hollow shaft 6 through a double ball bearing structure and a sealing structure, and the nut 10 is threadedly connected to the other end of the ferrule base 7. The external thread connection part 11, the inner center o...
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The invention provides a purge gas connecting device for sleeve welding of an optical fiber perform. By the adoption of the purge gas connecting device, the problems of impurities , unsmooth rotation and the like caused by gas leakage and friction during gas intake are solved, the purge gas connecting device has the high-temperature resistance, and the quality of the optical fiber perform is ensured. The purge gas connecting device comprises rotary positioning structures which are arranged in pairs. One ends of two sleeves to be welded are arranged in silica gel sleeves of the rotary positioning structures at the corresponding positions in a sleeved mode respectively. The other ends of the sleeves to be welded are arranged oppositely and welded together through a welding device. The purge gas connecting device is characterized in that each rotary positioning structure comprises a the corresponding silica gel sleeve, a cone, a hollow shaft, a ferrule base body, a first ferrule, a second ferrule and a nut; the inner end of each hollow shaft is sleeved with one end of the corresponding ferrule base body; the ferrule base bodies are arranged outside the inner ends of the hollow shafts in a sleeving mode through two-ball bearing structures and sealing structures; the nuts are connected with external thread connecting parts at the other ends of the ferrule base bodies in a threaded mode, and a communication cavity is formed in the center of the interior of each ferrule base body.
Description
technical field [0001] The invention relates to the technical field of optical fiber preform manufacturing, in particular to an optical fiber preform casing welding purge gas connection device. Background technique [0002] The sleeve method is used to manufacture optical fiber preforms, and sleeve welding is an essential process. The sleeve is a hollow cylinder. During the welding process, gas needs to be introduced inside to prevent cold and hot air convection from forming condensed water inside and Prevent the diameter of the inner wall of the welding end from changing. The structure of the purge gas connection device during the casing welding process determines the cleanliness of the casing inner wall, and the purge gas connection device is also required to have the characteristics of 360° rotation and high temperature resistance during the casing welding process. [0003] The patent number is CN201420238202.5, which discloses a high-pressure high-speed rotary joint. Th...
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IPC IPC(8): F16L27/087
CPCF16L27/087
Inventor 许荣平段宏杰徐勤华樊文强李军平张敬畏史知敏杜林
Owner JIANGSU HENGTONG PHOTOELECTRIC