Optical fiber preform clamping device and working method thereof

Abstract

The invention is suitable for the technical field of optical fiber preform rod wire drawing, and provides an optical fiber preform rod clamping device and a working method thereof.The optical fiber preform rod clamping device comprises a wire drawing tower support, a mounting shell, a feeding assembly, a heater, a preform rod part and a clamping assembly; the wire drawing tower support is suitable for providing an installation environment for the installation shell, and the installation shell is suitable for providing an installation environment for the internal components; the feeding assembly is arranged in the mounting shell and is suitable for driving the clamping assembly and the preform rod part to move up and down; the feeding assembly comprises a feeding motor, and a lead screw is arranged at the bottom end of the feeding motor. The device solves the problems that the preform is flexibly clamped, the preform wire drawing utilization rate is low, and the preform and an extension bar incline and deviate in the wire drawing process to cause uneven heating, and achieves the effects of improving the preform utilization rate, realizing sustainable utilization, reducing the cost, improving the clamping flexibility and improving the wire drawing quality.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber preform drawing, and more specifically, to an optical fiber preform clamping device and a working method thereof. Background Art

[0002] Fiber preform drawing is the process of drawing a fiber preform into an optical fiber after heating and softening it. The basic principle is to use the viscous flow characteristics of the preform material at high temperature for drawing. During the fiber preform drawing process, the preform needs to be sent into a heating furnace for heating, and the preform is made of quartz material, so the clamping of the preform requires flexible clamping.

[0003] At present, the preform rod drawing process mainly uses the length of the preform rod body for drawing. However, the clamping part generally cannot be extended into the heating equipment, and there will be a section of the preform rod that cannot be burned and drawn, which wastes materials. On the other hand, in the manufacture of optical fiber preform rods, the main component is high-purity quartz glass, which has high hardness but poor toughness. When subjected to uneven clamping force, it is easy to produce stress concentration locally, causing the preform rod to break. Although the utilization rate of the preform rod can be improved by melting and connecting one end of the extension rod, the extension rod of the preform rod is not integrally formed with the preform rod, and there will be a certain degree of tilt and offset. When the preform rod is tilted, the part of the preform rod entering the heating furnace during the drawing process will be unevenly heated. This will lead to inconsistent glass softening in different areas, resulting in fluctuations in the diameter of the drawn optical fiber. It may even cause uneven stress distribution during the drawing process, resulting in an impact on the strength of the optical fiber.

[0004] Therefore, an optical fiber preform clamping device and a working method thereof are proposed to solve the problems of flexible clamping of preforms, low utilization rate of preforms in drawing, and uneven heating caused by tilting and offset of preforms and extension rods during drawing. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide an optical fiber preform clamping device and a working method thereof that improves the utilization rate of the preform, achieves sustainable utilization, reduces costs, increases the flexibility of clamping, and improves the drawing quality.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an optical fiber preform clamping device, comprising a drawing tower support, a mounting shell, a feeding assembly, a heater, a preform portion and a clamping assembly, wherein the mounting shell is arranged on one side of the drawing tower support, the drawing tower support is suitable for providing an installation environment for the mounting shell, and the mounting shell is suitable for providing an installation environment for internal components; the feeding assembly is arranged inside the mounting shell, and the feeding assembly is suitable for driving the clamping assembly and the preform portion to move up and down; the feeding assembly comprises a feeding motor, a screw rod is arranged at the bottom end of the feeding motor, a sliding block is arranged on one side of the screw rod, a group of guide rails are arranged on both sides of the screw rod, and a side of the guide rail close to the sliding block is provided The preform rod portion is provided with multiple groups of sliders; the heater is arranged at the bottom end of the installation shell, and the heater is suitable for heating the bottom end of the preform rod; the preform rod portion is arranged coaxially with the heater, and the preform rod portion is suitable for preform rod drawing; the preform rod portion includes a preform rod body, a preform rod extension rod is arranged at the top end of the preform rod body, and two groups of extension rod clamping blocks are arranged on the side of the preform rod extension rod away from the preform rod body; the clamping assembly is arranged at the top end of the sliding block, and the clamping assembly is suitable for clamping the preform rod portion; the clamping assembly includes a tilt correction plate, a plurality of groups of springs are arranged at the bottom end of the tilt correction plate, a clamping motor is arranged at the top end of the tilt correction plate, and an opposing clamping mechanism is arranged on the side of the clamping motor close to the preform rod portion.

[0007] The present invention is further configured as follows: two groups of the guide rails are fixedly connected to the mounting housing, the lead screw is fixedly connected to the output end of the feeding motor, the sliding block is slidably connected to the lead screw, multiple groups of the sliding blocks are fixedly connected to the sliding blocks, and the sliding blocks are slidably connected to the guide rails; the diameter of the preform rod extension rod is smaller than the preform rod body, the diameter of the two groups of the extension rod clamping blocks is larger than the preform rod extension rod, and the length of the preform rod body is smaller than the preform rod extension rod.

[0008] By adopting the above technical scheme, the preform rod body is the part of the preform rod that needs wire drawing, the preform rod extension rod and the extension rod clamping block are the preform rod extension rod part, and the two groups of extension rod clamping blocks provide an environment for the clamping of the clamping assembly, which is convenient for the flexible clamping of the clamping assembly. At the same time, the two groups of extension rod clamping blocks can share the overall weight of the preform rod part, reduce the problem of the extension rod clamping blocks being crushed by the clamping assembly, and improve the overall strength of the clamping part. At the same time, the preform rod extension rod and the extension rod clamping block can be reused and connected to the preform rod body by hot melt connection. The length of the preform rod extension rod is greater than the preform rod body, so that the entire preform rod body can be extended into the heater, thereby improving the utilization rate of the preform rod, achieving sustainable utilization, and reducing costs.

[0009] The present invention is further configured as follows: one end of the spring is fixedly connected to the tilt correction plate, the other end of the spring is fixedly connected to the sliding block, and the bottom end of the clamping motor is fixedly connected to the tilt correction plate.

[0010] The present invention is further configured as follows: the opposing clamping mechanism includes a motor mounting plate, limit blocks are symmetrically arranged on both sides of the motor mounting plate, a motor rotating rod is arranged at the center of the motor mounting plate, the motor rotating rod is rotatably connected to the motor mounting plate, a group of push-pull connecting rods are respectively inserted at both ends of the motor rotating rod, a sliding column is inserted at the other end of the push-pull connecting rod, a clamping sliding block is arranged on one side of the sliding column, a counter-clamping plate is arranged on the side of the clamping sliding block away from the sliding column, and a sliding block is arranged on the side of the counter-clamping plate close to the limit block.

[0011] By adopting the above technical scheme, the motor mounting plate provides an installation environment for the clamping motor, and the limit blocks at both ends of the motor mounting plate provide movement limits for the clamping sliding block, the clamping plate, the sliding block, and the sliding column, so that they can only move left and right. When the clamping motor is driven, the clamping motor drives the motor rotating rod to rotate, and one end of the push-pull connecting rod rotates with the motor rotating rod, and the other end of the push-pull connecting rod pulls the sliding column to move, so that the clamping sliding block, the clamping plate, and the sliding block slide on the limit blocks to achieve clamping of the two sets of extension rod clamping blocks. At the same time, the upper and lower ends of the clamping plate are wrapped with rubber sleeves, which can effectively reduce the influence of the metal surface on the extension rod clamping block. On the other hand, the clamping motor using torque control can reasonably control the rotation or stop according to the change of torque, reduce the problem of excessive clamping force crushing the preform rod extension rod or the extension rod clamping block, and improve the flexibility of clamping.

[0012] The present invention is further configured as follows: a correction component is arranged at the bottom end of the installation shell, and the correction component is suitable for assisting the preform rod portion to align with the center of the heater; the correction component includes a driving mechanism, and a group of correction moving mechanisms are symmetrically arranged at the top of the driving mechanism, and a group of correction clamping mechanisms are respectively arranged at the top of the two groups of correction moving mechanisms.

[0013] The present invention is further configured as follows: the driving mechanism includes a bottom mounting plate, a driving motor is arranged on one side of the bottom mounting plate, a belt gear is fixedly connected to the output end of the driving motor, a turning auxiliary wheel is arranged on the side of the belt gear close to the bottom mounting plate, a group of turning pulleys are respectively arranged on both sides of the bottom mounting plate, and belts are arranged around the outer sides of the belt gear, the turning auxiliary wheel and the two groups of turning pulleys.

[0014] The present invention is further configured as follows: the correction moving mechanism includes a correction sliding block, a group of correction sliding blocks are arranged at the bottom of the correction sliding block, the bottom of the correction sliding block is slidably connected to a correction guide rail, two groups of belt clip shells are arranged on one side of the correction sliding block, and a group of belt clip mechanisms are respectively arranged on the two groups of belt clip shells close to one side of the correction sliding block, and the two groups of belt clip shells are slidably connected to the belt.

[0015] The present invention is further configured as follows: the belt clamp mechanism includes a driving cylinder, a downward push rod is provided at the bottom end of the driving cylinder, a first clamp rod is provided on one side of the downward push rod, a second clamp rod is provided on the side of the downward push rod away from the first clamp rod, and a center pin is inserted between the downward push rod, the first clamp rod and the second clamp rod.

[0016] The present invention is further configured as follows: the correction clamping mechanism includes a double-rod cylinder, the double-rod cylinder is arranged at the top of the bottom mounting plate, an anti-collision clamp is arranged on the side of the bottom mounting plate away from the double-rod cylinder, the top of the double-rod cylinder is slidably connected with a cylinder slider, the top of the cylinder slider is provided with a rotating cylinder, and the output end of the rotating cylinder is provided with a clamping rod.

[0017] By adopting the above technical solution, the anti-collision clamp restricts the preform body or the preform extension rod from hitting the bottom mounting plate to cause the preform part to break, the cylinder slider moves to further determine the position, the rotating cylinder rotates to restrict the position of the preform body or the preform extension rod, and the rotating cylinder drives the clamp rod to restrict the preform part from shaking. During the wire drawing operation, if the preform part tilts in the front and back directions, it can be corrected by controlling the cylinder sliders on both sides to move in the same direction to improve the wire drawing quality.

[0018] A working method of an optical fiber preform clamping device, using the optical fiber preform clamping device as described above, comprises the following steps:

[0019] S1. An operator melts the preform extension rod away from one end of the extension rod clamping block, so that the preform extension rod is connected to the preform body;

[0020] S2, two groups of extension rod clamping blocks realize clamping through clamping motor driving opposing clamping mechanism;

[0021] S3, driving the feeding motor to drive the screw to rotate, and at the same time, the slider and the guide rail cooperate to limit the moving direction of the sliding block, so that the sliding block drives the clamping assembly and the preform rod part to move up and down;

[0022] S4. When the preform rod portion moves downward, the heater heats the preform rod body and cooperates with the equipment below the heater to achieve wire drawing of the preform rod.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The preform body is the part that needs wire drawing, and the preform extension rod and extension rod clamping block are the extension rod parts. The two sets of extension rod clamping blocks provide a clamping environment for the clamping assembly, which is convenient for flexible clamping, can share the overall weight of the preform, reduce the problem of the clamping block being crushed by the clamping assembly, and improve the strength of the clamping part. The preform extension rod and the clamping block are reusable and connected to the preform body by hot melting. The extension rod is longer than the body, which allows the preform body to be fully extended into the heater, improves utilization, achieves sustainable utilization and reduces costs.

[0025] 2. The motor mounting plate provides an installation environment for the clamping motor. The limit blocks at both ends of the motor mounting plate provide movement limits for the clamping sliding block, the clamping plate, the sliding block, and the sliding column, so that they can only move left and right. When the clamping motor is driven, the clamping motor drives the motor rotating rod to rotate, and one end of the push-pull connecting rod rotates with the motor rotating rod, and the other end of the push-pull connecting rod pulls the sliding column to move, so that the clamping sliding block, the clamping plate, and the sliding block slide on the limit blocks to achieve clamping of the two sets of extension rod clamping blocks. At the same time, the upper and lower ends of the clamping plate are wrapped with rubber sleeves, which can effectively reduce the influence of the metal surface on the extension rod clamping block. On the other hand, the clamping motor using torque control can reasonably control the rotation or stop according to the change of torque, reduce the problem of excessive clamping force crushing the preform extension rod or the extension rod clamping block, and improve the flexibility of clamping.

[0026] 3. The anti-collision clamp restricts the preform body or the preform extension rod from hitting the bottom mounting plate and causing the preform part to break. The cylinder slider moves to further determine the position. The rotating cylinder rotates to restrict the position of the preform body or the preform extension rod. The rotating cylinder drives the clamp rod to restrict the preform part from shaking. During the wire drawing operation, if the preform part tilts in the front and back directions, it can be corrected by controlling the cylinder sliders on both sides to move in the same direction to improve the wire drawing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the optical fiber preform clamping device of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the feeding assembly in the present invention;

[0029] Figure 3 It is a structural schematic diagram of the preform rod part in the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the clamping assembly in the present invention;

[0031] Figure 5 It is an exploded schematic diagram of the opposing clamping mechanism in the present invention;

[0032] Figure 6 It is a structural schematic diagram of the correction component in the present invention;

[0033] Figure 7 It is a structural schematic diagram of the driving mechanism in the present invention;

[0034] Figure 8 It is a structural schematic diagram of the correction sliding block, the correction guide rail and the correction sliding block in the present invention;

[0035] Fig. 9 for Figure 7 A schematic diagram of the local enlarged structure of the middle A area;

[0036] Fig.10 It is an exploded schematic diagram of the correction clamping mechanism in the present invention;

[0037] Fig.11 It is a structural schematic diagram of the belt clip mechanism in the present invention;

[0038] Description of reference numerals: 1. drawing tower bracket;

[0039] 2. Install the housing;

[0040] 3. Feeding assembly; 31. Feeding motor; 32. Screw rod; 33. Sliding block; 34. Guide rail; 35. Sliding block;

[0041] 4. Heater;

[0042] 5. Clamping assembly; 51. Tilt correction plate; 52. Spring; 53. Clamping motor; 54. Opposite clamping mechanism; 541. Motor mounting plate; 542. Limit block; 543. Motor rotating rod; 544. Push-pull connecting rod; 545. Clamping sliding block; 546. Opposite clamping plate; 547. Sliding block; 548. Sliding column;

[0043] 6. Correction assembly; 61. Driving mechanism; 611. Bottom mounting plate; 612. Driving motor; 613. Belt gear; 614. Turning auxiliary wheel; 615. Turning pulley; 616. Belt; 62. Correction moving mechanism; 621. Correction sliding block; 622. Correction guide rail; 623. Correction slider; 624. Belt clamp housing; 625. Belt clamp mechanism; 6251. Driving cylinder; 6252. Pressing push rod; 6253. First clamping rod; 6254. Second clamping rod; 6255. Center pin; 63. Correction clamping mechanism; 631. Double-rod cylinder; 632. Cylinder slider; 633. Anti-collision clamp; 634. Rotating cylinder; 635. Clamping rod;

[0044] 7. Preform rod part; 71. Preform rod body; 72. Preform rod extension rod; 73. Extension rod clamping block. DETAILED DESCRIPTION

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0047] See also Figure 1-11 , the present invention provides the following technical solutions:

[0048] Example 1, see Figure 1 , an optical fiber preform clamping device, comprising a drawing tower support 1, the drawing tower support 1 is suitable for providing an installation environment for an installation shell 2, the installation shell 2 is suitable for providing an installation environment for internal components, a feeding assembly 3 is arranged inside the installation shell 2, a heater 4 is arranged at the bottom of the installation shell 2, the heater 4 is suitable for heating the bottom of the preform, the feeding assembly 3 drives the preform to move up and down, and the specific mechanism of the feeding assembly 3 is as follows:

[0049] See also Figure 2 The feeding assembly 3 includes a feeding motor 31, a screw rod 32 is arranged at the bottom end of the feeding motor 31, a sliding block 33 is arranged on one side of the screw rod 32, a group of guide rails 34 are arranged on both sides of the screw rod 32, and a plurality of groups of sliders 35 are arranged on the side of the guide rails 34 close to the sliding block 33; the feeding motor 31 is driven to drive the screw rod 32 to rotate, and the guide rails 34 and the sliders 35 on both sides of the screw rod 32 cooperate to limit the moving direction of the sliding block 33, so that the sliding block 33 can only move up and down. The feeding assembly 3 can provide a precise vertical displacement adjustment function, so that the operator can easily adjust the height position of each component according to actual production needs.

[0050] The existing preform rod drawing process mainly draws the wire through the length of the preform rod body. However, the clamping part generally cannot be extended into the heating device, and there will be a section of the preform rod that cannot be fired and drawn.

[0051] For this purpose, see Figure 1 The feeding assembly 3 is suitable for driving the preform rod part 7 to move up and down. The specific structure of the preform rod part 7 is as follows:

[0052] See also Figure 3The preform rod part 7 includes a preform rod body 71, a preform rod extension rod 72 is arranged at the top of the preform rod body 71, two groups of extension rod clamping blocks 73 are arranged on the side of the preform rod extension rod 72 away from the preform rod body 71, the diameter of the preform rod extension rod 72 is smaller than that of the preform rod body 71, the diameter of the two groups of extension rod clamping blocks 73 is larger than that of the preform rod extension rod 72, and the length of the preform rod body 71 is smaller than that of the preform rod extension rod 72; the preform rod body 71 is the part of the preform rod that needs to be drawn, the preform rod extension rod 72 and the extension rod clamping block 73 are the extension parts of the preform rod, and the two groups of extension rod clamping blocks 73 are the clamping assembly 5 The support provides an environment that is convenient for the flexible clamping of the clamping assembly 5. At the same time, the two groups of extension rod clamping blocks 73 can bear the overall weight of the preform rod portion 7 when the clamping assembly 5 clamps the preform rod portion 7, thereby avoiding the problem of the preform rod body 71 being clamped by the clamping assembly 5 and being broken as a whole. At the same time, the preform rod extension rod 72 and the extension rod clamping block 73 can be reused and connected to the preform rod body 71 by hot-melt connection. The length of the preform rod extension rod 72 is greater than that of the preform rod body 71, so that the entire preform rod body 71 can be extended into the heater 4, thereby improving the utilization rate of the preform rods, realizing sustainable utilization, and reducing costs.

[0053] In the manufacture of optical fiber preform, the main component is high-purity quartz glass, which has high hardness but poor toughness. When subjected to uneven clamping force, it is easy to produce stress concentration in the local area, causing the preform to break.

[0054] For this purpose, see Figure 4 The clamping assembly 5 is arranged at the top of the sliding block 33, and the clamping assembly 5 is suitable for clamping the preform rod part 7; the clamping assembly 5 includes a tilt correction plate 51, a plurality of springs 52 are arranged at the bottom end of the tilt correction plate 51, a clamping motor 53 is arranged at the top end of the tilt correction plate 51, and a counter clamping mechanism 54 is arranged on the side of the clamping motor 53 close to the preform rod part 7; one end of the spring 52 is fixedly connected to the tilt correction plate 51, the other end of the spring 52 is fixedly connected to the sliding block 33, and the bottom end of the clamping motor 53 is fixedly connected to the tilt correction plate 51. The spring 52 at the bottom of the tilt correction plate 51 provides support for the device. At the same time, when the preform rod portion 7 is corrected, the preform rod extension rod 72 and the extension rod clamping block 73 at the top will be tilted, and the opposite clamping mechanism 54 also needs to be tilted. At this time, the spring 52 can provide angle compensation for the opposite clamping mechanism 54, and the clamping motor 53 at the top of the spring 52 provides drive for the opposite clamping mechanism 54, so that the opposite clamping mechanism 54 clamps the preform rod portion 7. The specific structure of the opposite clamping mechanism 54 is as follows:

[0055] See also Figure 5The opposing clamping mechanism 54 includes a motor mounting plate 541, and limiting blocks 542 are symmetrically arranged on both sides of the motor mounting plate 541. A motor rotating rod 543 is arranged in the center of the motor mounting plate 541. The motor rotating rod 543 is rotatably connected to the motor mounting plate 541. A group of push-pull connecting rods 544 are respectively inserted at both ends of the motor rotating rod 543, and a sliding column 548 is inserted at the other end of the push-pull connecting rod 544. A clamping sliding block 545 is arranged on one side of the sliding column 548, and a clamping plate 546 is arranged on the side of the clamping sliding block 545 away from the sliding column 548, and a sliding block 547 is arranged on the side of the clamping plate 546 close to the limiting block 542. The motor mounting plate 541 is used to provide an installation environment for the clamping motor 53. The limit blocks 542 at both ends of the motor mounting plate 541 provide movement limits for the clamping sliding block 545, the clamping plate 546, the sliding block 547, and the sliding column 548, so that they can only move left and right. When the clamping motor 53 is driven, the clamping motor 53 drives the motor rotating rod 543 to rotate, and one end of the push-pull connecting rod 544 rotates with the motor rotating rod 543, and the other end of the push-pull connecting rod 544 pulls the sliding column 548 to move, so that the clamping sliding block 545, the clamping plate 546, the sliding block 547, and the sliding column 548 can only move left and right. The movable block 545, the clamping plate 546, and the sliding block 547 slide on the limit block 542 to clamp the two sets of extension rod clamping blocks 73. At the same time, the upper and lower end surfaces of the clamping plate 546 are wrapped with rubber sleeves, which can effectively reduce the influence of the metal surface on the extension rod clamping block 73. On the other hand, the clamping motor 53 with torque control can reasonably control the rotation or stop according to the change of torque, reduce the problem of excessive clamping force crushing the preform rod extension rod 72 or the extension rod clamping block 73, and improve the flexibility of clamping.

[0056] In the second embodiment, the extension rod of the preform is not integrally formed with the preform, and there will be a certain degree of tilt and offset. When the preform is tilted, the part of the preform entering the heating furnace during the drawing process will be heated unevenly. This will lead to inconsistent softening of the glass in different areas, resulting in fluctuations in the diameter of the drawn optical fiber. It may even lead to uneven stress distribution during the drawing process, affecting the strength of the optical fiber.

[0057] See also Figure 6 For this purpose, a correction assembly 6 is provided at the bottom of the installation housing 2, and the correction assembly 6 is suitable for assisting the preform rod portion 7 to align with the center of the heater 4; the correction assembly 6 includes a driving mechanism 61, and a group of correction moving mechanisms 62 are symmetrically provided at the top of the driving mechanism 61, and a group of correction clamping mechanisms 63 are respectively provided at the top of the two groups of correction moving mechanisms 62. The correction moving mechanisms 62 are driven by the driving mechanism 61 to move, so that the correction clamping mechanisms 63 can be clamped, wherein the driving mechanism 61 is driven by a toothed pulley, and the specific structure of the driving mechanism 61 is as follows:

[0058] See also Figure 7The driving mechanism 61 includes a bottom mounting plate 611, a driving motor 612 is arranged on one side of the bottom mounting plate 611, a belt gear 613 is fixedly connected to the output end of the driving motor 612, a turning auxiliary wheel 614 is arranged on the side of the belt gear 613 close to the bottom mounting plate 611, and a group of turning pulleys 615 are arranged on both sides of the bottom mounting plate 611, and a belt 616 is arranged around the outer sides of the belt gear 613, the turning auxiliary wheel 614 and the two groups of turning pulleys 615. The belt gear 613 is driven to rotate by driving the driving motor 612, and the belt gear 613 can drive the belt 616 to move by rotating. The turning auxiliary wheel 614 and the turning pulley 615 limit the movement range of the belt 616. The correction moving mechanism 62 moves on the belt 616 to realize the clamping of the correction clamping mechanism 63. The specific mechanism of the correction moving mechanism 62 is as follows:

[0059] See also Figure 8-9 The correction moving mechanism 62 includes a correction sliding block 621, a group of correction sliders 623 are arranged at the bottom of the correction sliding block 621, and a correction guide rail 622 is slidably connected to the bottom of the correction slider 623. Two groups of belt clip housings 624 are arranged on one side of the correction sliding block 621. The two groups of belt clip housings 624 are respectively arranged with a group of belt clip mechanisms 625 near the side of the correction sliding block 621. The two groups of belt clip housings 624 are slidably connected with the belt 616. For example, referring to the figure, when one group of correction sliding blocks 621 needs to move to the left, the belt clip mechanism 625 near the driving mechanism 61 is clamped, and when the other group needs to move to the right, it is only necessary to control the belt clip mechanism 625 away from the driving mechanism 61 to clamp. When the preform rod part 7 needs to be corrected, the correction clamping mechanism 63 restricts the preform rod part 7 from shaking, and controls the belt clamping mechanism 625 on the same side under the two sets of correction sliding blocks 621 to clamp the belt 616, so that the correction sliding blocks 621 move to the same side to achieve left-right correction. The belt clamp housing 624 provides an installation environment for the belt clamping mechanism 625, and the correction guide rail 622 and the correction slider 623 limit the movement range of the correction sliding block 621. The movement of the correction sliding block 621 is controlled by the belt clamping mechanism 625. The specific structure of the belt clamping mechanism 625 is as follows:

[0060] See also Fig.11The belt clamp mechanism 625 includes a driving cylinder 6251, a push rod 6252 is provided at the bottom end of the driving cylinder 6251, a first clamp rod 6253 is provided on one side of the push rod 6252, a second clamp rod 6254 is provided on the side of the push rod 6252 away from the first clamp rod 6253, and a center pin 6255 is inserted between the push rod 6252, the first clamp rod 6253, and the second clamp rod 6254. The driving cylinder 6251 drives the push rod 6252 to move up and down, and the first clamp rod 6253 and the second clamp rod 6254 cooperate to clamp the belt 616. Two groups of belt clamp mechanisms 625 are provided on a group of correction sliding blocks 621, and the moving direction of the correction sliding blocks 621 can be controlled by the two groups of belt clamp mechanisms 625 at the front and rear. At this time, the correction sliding block 621 moves with the belt 616, and the movement of the correction sliding block 621 drives the correction clamping mechanism 63 to move, so as to clamp the preform body 71 or the preform extension rod 72. By controlling the two groups of correction sliding blocks 621 to move to the same side, the preform body 71 can be corrected in the left and right directions, thereby improving the subsequent wire drawing quality. The specific structure of the correction clamping mechanism 63 is as follows:

[0061] See also Fig.10 The correction clamping mechanism 63 includes a double-rod cylinder 631, which is arranged at the top of the bottom mounting plate 611, and an anti-collision clamp 633 is arranged on the side of the bottom mounting plate 611 away from the double-rod cylinder 631. A cylinder slider 632 is slidably connected to the top of the double-rod cylinder 631, and a rotating cylinder 634 is arranged at the top of the cylinder slider 632. A clamping rod 635 is arranged at the output end of the rotating cylinder 634. The anti-collision clamp 633 limits the preform body 71 or the preform extension rod 72 from hitting the bottom mounting plate 611 to cause the preform part 7 to break. The cylinder slider 632 moves to further determine the position, and the rotating cylinder 634 rotates so that the clamping rod 635 limits the position of the preform body 71 or the preform extension rod 72. The rotating cylinder 634 drives the clamping rod 635 to limit the preform part 7 from shaking. During the wire drawing operation, if the preform rod portion 7 is tilted in the front-to-back direction, correction can be performed by controlling the cylinder sliders 632 on both sides to move in the same direction to improve the wire drawing quality.

[0062] Embodiment 3, a working method of an optical fiber preform clamping device, using the optical fiber preform clamping device, comprises the following steps:

[0063] S1, the operator melts the preform extension rod 72 away from one end of the extension rod clamping block 73, so that the preform extension rod 72 is connected to the preform body 71;

[0064] S2, two groups of extension rod clamping blocks 73 drive the opposing clamping mechanism 54 through the clamping motor 53 to achieve clamping;

[0065] The more specific steps of S2 are:

[0066] S21, drive the clamping motor 53 to drive the motor rotating rod 543 to rotate, one end of the push-pull connecting rod 544 rotates along with the motor rotating rod 543, and the other end of the push-pull connecting rod 544 pulls the sliding column 548 to move, so that the clamping sliding block 545, the clamping plate 546, and the sliding block 547 slide on the limit block 542, thereby clamping the two sets of extension rod clamping blocks 73;

[0067] S3, driving the feeding motor 31 to drive the screw rod 32 to rotate, and at the same time, the slider 35 cooperates with the guide rail 34 to limit the moving direction of the sliding block 33, so that the sliding block 33 drives the clamping assembly 5 and the preform rod part 7 to move up and down;

[0068] S4. When the preform rod portion 7 moves downward, the heater 4 heats the preform rod body 71 and cooperates with the equipment below the heater 4 to achieve wire drawing of the preform rod.

[0069] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. An optical fiber preform clamping device, characterized in that: The invention comprises a drawing tower support (1), a mounting shell (2), a feeding assembly (3), a heater (4), a preform rod portion (7) and a clamping assembly (5), wherein the mounting shell (2) is arranged on one side of the drawing tower support (1), the drawing tower support (1) is suitable for providing an installation environment for the mounting shell (2), and the mounting shell (2) is suitable for providing an installation environment for internal components; The feeding assembly (3) is arranged inside the mounting housing (2), and the feeding assembly (3) is suitable for driving the clamping assembly (5) and the preform rod part (7) to move up and down; The feeding assembly (3) comprises a feeding motor (31), a screw rod (32) is arranged at the bottom end of the feeding motor (31), a sliding block (33) is arranged on one side of the screw rod (32), a group of guide rails (34) are arranged on both sides of the screw rod (32), and a plurality of groups of sliding blocks (35) are arranged on the side of the guide rail (34) close to the sliding block (33); The heater (4) is arranged at the bottom end of the mounting shell (2), and the heater (4) is suitable for heating the bottom end of the preform; The preform rod portion (7) is coaxially arranged with the heater (4), and the preform rod portion (7) is suitable for preform rod drawing; The preform rod part (7) comprises a preform rod body (71), a preform rod extension rod (72) is arranged at the top end of the preform rod body (71), and two groups of extension rod clamping blocks (73) are arranged on the side of the preform rod extension rod (72) away from the preform rod body (71); The clamping assembly (5) is arranged at the top end of the sliding block (33), and the clamping assembly (5) is suitable for clamping the preform rod part (7); The clamping assembly (5) comprises a tilt correction plate (51), a plurality of groups of springs (52) are arranged at the bottom end of the tilt correction plate (51), a clamping motor (53) is arranged at the top end of the tilt correction plate (51), and a counter clamping mechanism (54) is arranged on a side of the clamping motor (53) close to the preform rod portion (7).

2. The optical fiber preform clamping device according to claim 1, characterized in that: Two groups of the guide rails (34) are fixedly connected to the mounting housing (2), the screw rod (32) is fixedly connected to the output end of the feeding motor (31), the sliding block (33) is slidably connected to the screw rod (32), a plurality of groups of the sliding blocks (35) are fixedly connected to the sliding blocks (33), and the sliding blocks (35) are slidably connected to the guide rails (34); The diameter of the preform extension rod (72) is smaller than that of the preform body (71), the diameter of the two groups of extension rod clamping blocks (73) is larger than that of the preform extension rod (72), and the length of the preform body (71) is smaller than that of the preform extension rod (72).

3. The optical fiber preform clamping device according to claim 2, characterized in that: One end of the spring (52) is fixedly connected to the tilt correction plate (51), the other end of the spring (52) is fixedly connected to the sliding block (33), and the bottom end of the clamping motor (53) is fixedly connected to the tilt correction plate (51).

4. The optical fiber preform clamping device according to claim 3, characterized in that: The opposing clamping mechanism (54) comprises a motor mounting plate (541), and limit blocks (542) are symmetrically arranged on both sides of the motor mounting plate (541); a motor rotating rod (543) is arranged at the center of the motor mounting plate (541); the motor rotating rod (543) is rotatably connected to the motor mounting plate (541); a group of push-pull connecting rods (544) are respectively inserted at both ends of the motor rotating rod (543); a sliding column (548) is inserted at the other end of the push-pull connecting rod (544); a clamping sliding block (545) is arranged on one side of the sliding column (548); a clamping plate (546) is arranged on the side of the clamping sliding block (545) away from the sliding column (548); and a sliding block (547) is arranged on the side of the clamping sliding block (545) close to the limit block (542).

5. The optical fiber preform clamping device according to claim 1, characterized in that: A correction component (6) is provided at the bottom end of the installation shell (2), and the correction component (6) is suitable for assisting the preform rod portion (7) to align with the center of the heater (4); The correction component (6) comprises a driving mechanism (61), a group of correction moving mechanisms (62) are symmetrically arranged at the top of the driving mechanism (61), and a group of correction clamping mechanisms (63) are respectively arranged at the top of two groups of correction moving mechanisms (62).

6. The optical fiber preform clamping device according to claim 5, characterized in that: The driving mechanism (61) comprises a bottom mounting plate (611), a driving motor (612) is arranged on one side of the bottom mounting plate (611), a belt gear (613) is fixedly connected to the output end of the driving motor (612), a turning auxiliary wheel (614) is arranged on the side of the belt gear (613) close to the bottom mounting plate (611), a group of turning pulleys (615) are arranged on both sides of the bottom mounting plate (611), and belts (616) are arranged around the outer sides of the belt gear (613), the turning auxiliary wheel (614) and the two groups of turning pulleys (615).

7. The optical fiber preform clamping device according to claim 6, characterized in that: The correction moving mechanism (62) comprises a correction sliding block (621), a group of correction sliding blocks (623) are arranged at the bottom end of the correction sliding block (621), the bottom end of the correction sliding block (623) is slidably connected to a correction guide rail (622), two groups of belt clip shells (624) are arranged on one side of the correction sliding block (621), a group of belt clip mechanisms (625) are respectively arranged on one side of the two groups of belt clip shells (624) close to the correction sliding block (621), and the two groups of belt clip shells (624) are slidably connected to the belt (616).

8. The optical fiber preform clamping device according to claim 7, characterized in that: The belt clamp mechanism (625) includes a driving cylinder (6251), a downward push rod (6252) is provided at the bottom end of the driving cylinder (6251), a first clamping rod (6253) is provided on one side of the downward push rod (6252), a second clamping rod (6254) is provided on the side of the downward push rod (6252) away from the first clamping rod (6253), and a center pin (6255) is inserted between the downward push rod (6252), the first clamping rod (6253) and the second clamping rod (6254).

9. The optical fiber preform clamping device according to claim 8, characterized in that: The correction clamping mechanism (63) comprises a double-rod cylinder (631), the double-rod cylinder (631) is arranged at the top of the bottom mounting plate (611), an anti-collision clamp (633) is arranged on the side of the bottom mounting plate (611) away from the double-rod cylinder (631), the top of the double-rod cylinder (631) is slidably connected with a cylinder slider (632), the top of the cylinder slider (632) is provided with a rotating cylinder (634), and the output end of the rotating cylinder (634) is provided with a clamping rod (635).

10. A method for operating an optical fiber preform clamping device, using the optical fiber preform clamping device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. An operator melts one end of the preform rod extension rod (72) away from the extension rod clamping block (73), so that the preform rod extension rod (72) is connected to the preform rod body (71); S2, two groups of extension rod clamping blocks (73) drive the opposing clamping mechanism (54) through the clamping motor (53) to achieve clamping; S3, driving the feeding motor (31) to drive the screw rod (32) to rotate, and at the same time, the slider (35) cooperates with the guide rail (34) to limit the moving direction of the sliding block (33), so that the sliding block (33) drives the clamping assembly (5) and the preform rod part (7) to move up and down; S4. When the preform rod portion (7) moves downward, the heater (4) heats the preform rod body (71) and cooperates with the equipment below the heater (4) to achieve wire drawing of the preform rod.

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