Tapered taper processing and forming device applied to preparation of optical fiber preform
By designing a tapered processing and forming device for optical fiber prefabricated rods, the rapid reversal of quartz glass rods is achieved by rotating the rollers, which solves the problem of frequent disassembly and installation of quartz glass rods in the prior art, and improves the processing efficiency .
Patent Information
- Application Number
- CN202411606581.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-02-07
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During the taper processing process, existing fiber prefabricated rods need to be frequently disassembled and installed quartz glass rods, resulting in wasted time and low processing efficiency.
A tapered processing forming device is designed, including groove plate, moving plate, clamp seat, roller and positioning column. The rotation of the roller achieves rapid reversal of the quartz glass rod, without disassembly and assembly, and the next time is directly carried out. Taper treatment.
It realizes rapid rotation and reversal of quartz glass rods, saves disassembly and assembles, and improves processing efficiency.
Smart Images
Figure CN119390340A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of optical fiber production accessory devices, and in particular to a taper processing and forming device used in the preparation of optical fiber preform rods. Background Art
[0002] In the process of preparing optical fiber preform, it is necessary to first draw the end of the optical fiber preform into a tapered shape so that the drawing and forming of the optical fiber can be more efficient and have a high pass rate. At present, in the process of taper processing of optical fiber preform, the optical fiber preform and the quartz glass rod are usually fused together by high-temperature heating, and then opposite pulling forces are applied to the optical fiber preform and the quartz glass rod at the same time, so as to draw the end of the optical fiber preform into a streamlined cone, and cut the connection between the optical fiber preform and the quartz glass rod. However, in the process of taper processing of existing optical fiber preform, after using one end of the quartz glass rod to complete the taper processing of the optical fiber preform, when it is necessary to use the other end of the quartz glass rod to continue the taper processing of the remaining optical fiber preform, the quartz glass rod needs to be disassembled and reinstalled, which is quite time-consuming. Summary of the invention
[0003] The main purpose of the present invention is to provide a taper processing and forming device used in the preparation of optical fiber preform, so as to effectively solve the problems pointed out in the background technology.
[0004] In order to achieve the above object, the technical solution adopted by the present invention is: A taper processing and forming device used in the preparation of optical fiber preform rods includes a groove plate, on which two movable plates are slidably arranged relative to or away from each other, one of which is fixedly provided with a clamping seat, on which a clamping assembly is provided, and the other movable plate is rotatably provided with a roller, a limiting hole is radially penetrated by the roller, and a group of positioning columns are slidably provided on the roller.
[0005] Preferably, linkage columns are fixedly provided at the bottom ends of the two movable plates, an elliptical plate is rotatably provided between the two linkage columns, the two linkage columns are in sliding contact with the circumferential outer wall of the elliptical plate, and support springs are provided between the opposite ends of the two movable plates and the corresponding inner wall of the slide groove; The utility model also comprises a chassis, and the slot plate is fixed on the chassis.
[0006] Preferably, the limiting holes include a plurality of limiting holes, the plurality of limiting holes are arranged equidistantly along the axial direction of the roller, the plurality of limiting holes are arranged in an equiangular circumferential array, the number of groups of the positioning columns is the same as the number of limiting holes, a connecting plate is fixedly arranged on the top of the plurality of positioning columns, a rotating column is fixedly arranged coaxially with the bottom end of the roller, a cross telescopic groove is arranged at the bottom end of the rotating column, a cross fixing frame is slidably arranged in the cross telescopic groove, and the bottom end of the cross fixing frame is rotatably mounted on the corresponding movable plate, three spiral grooves are arranged on the circumferential outer wall of the rotating column, the three spiral grooves are divided into a first spiral groove, a second spiral groove and a third spiral groove, the first spiral groove and the second spiral groove are equidistantly arranged on the circumferential outer wall of the rotating column, the lowest point of the first spiral groove is connected with the highest point of the second spiral groove through the third spiral groove, a supporting plate is fixedly arranged on the movable plate, a guide column is fixedly arranged on one end of the supporting plate facing the rotating column, and the guide column is slidably mounted on the lowest point of the first spiral groove at one end facing away from the supporting plate.
[0007] Preferably, the clamping assembly includes two driving plates, and the two driving plates are located on both sides of the locking seat. The two driving plates move relative to or away from each other. Two groups of through holes are provided on both sides of the locking seat. The through holes are connected with the locking holes. Clamping columns are slidably arranged in the through holes. Each group of through holes includes two through holes that are symmetrical in upper and lower parts. One end of the two symmetrical clamping columns located in the locking holes is provided with an inclined surface, and the end of the clamping column facing away from the locking hole is fixedly connected to the corresponding driving plate.
[0008] Preferably, a transmission motor is fixedly arranged on the support plate, a transmission shaft is arranged at the output end of the transmission motor, a gear is fixedly arranged at the end of the transmission shaft facing away from the transmission motor, the height of the gear is greater than the lifting stroke of the rotating column, a gear ring is fixedly arranged on the circumferential outer wall of the rotating column, and the gear is meshed with the gear ring.
[0009] Preferably, a mounting frame is fixedly provided at the top of the roller, a cylinder is fixedly provided on the mounting frame, a telescopic shaft is provided at the output end of the cylinder, and one end of the telescopic shaft facing away from the cylinder is fixedly connected to the connecting plate.
[0010] Preferably, a box opening is provided at the front end of the chassis, the box opening is communicated with the chamber, two door panels are hingedly provided at the box opening, handles are fixedly provided on the two door panels, heat dissipation holes are provided on the side walls of the chassis, and support feet are provided at the bottom end of the chassis.
[0011] Preferably, the supporting springs are provided in a plurality and the plurality of supporting springs are arranged equidistantly. The plurality of supporting springs arranged equidistantly make the elastic support for the moving plate more stable.
[0012] After adopting the above technical solution, the beneficial effects of the present invention are: After completing the streamline taper forming of the optical fiber preform and cutting off the connection between the optical fiber preform and the quartz glass rod, the roller is rotated by a certain angle to complete the reversal of the quartz glass rod, and the other end of the quartz glass rod is used to continue the next taper processing. The quartz glass rod is quickly rotated and reversed without disassembly and assembly, saving time and improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] 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 some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0014] Figure 1 is a schematic three-dimensional diagram of the overall structure of the embodiment of the present invention, viewed from the right front top corner downward; Figure 2 is a front plan view of the overall structure in an embodiment of the present invention; Figure 3 It is a schematic three-dimensional diagram of a partial structure of a roller in an embodiment of the present invention, viewed from the left front top angle downward; Figure 4 is a front plan view of the connecting plate, the positioning column and the quartz glass rod after the positioning column in the embodiment of the present invention presses the quartz glass rod; Figure 5 It is a three-dimensional diagram of the distribution of the first spiral groove, the second spiral groove and the third spiral groove on the rotating column in an embodiment of the present invention and a planar development diagram of the rotating column; Figure 6 It is a right side plan view of a part of the structure of the card seat in an embodiment of the present invention; Figure 7 It is a schematic three-dimensional diagram of a partial structure of a chassis and a slot plate in an embodiment of the present invention when viewed from the front side, with the lower right corner of the structure looking upward; Figure 8 is a schematic three-dimensional diagram of the structure of the slot plate in the embodiment of the present invention, viewed from the right front top corner and obliquely downward; 1. The sprocket wheel of the embodiment of the present invention is provided with a plurality of teeth, and a plurality of teeth are provided with a plurality of teeth. The sprocket wheel of the embodiment of the present invention is provided with a plurality of teeth. The sprocket wheel of the embodiment of the present invention is provided with a plurality of teeth. DETAILED DESCRIPTION
[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0016] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.
[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0018] In order to solve the problem of time wasting in the process of disassembling and assembling the quartz glass rod in the prior art, the embodiment of the present invention realizes rapid rotation and reversal of the quartz glass rod, without the need for disassembly and assembly, thus saving time and improving processing efficiency. The embodiment of the present invention is described in detail below: like Figure 1-8 The taper forming device for preparing optical fiber preforms shown in the figure comprises a slot plate 1, on which two movable plates 2 are arranged to slide relative to or opposite to each other, one of which is fixedly provided with a clamping seat 3, on which a clamping assembly is arranged, and the other movable plate 2 is rotatably provided with a roller 4, on which a limiting hole is arranged in the radial direction, and on which a group of positioning posts 5 are slidably arranged; More specifically, a slide groove is provided on the groove plate 1, and the two movable plates 2 are slidably installed in the slide groove. Driven by the two movable plates 2, the roller 4 and the clamping seat 3 move relative to or opposite to each other. The clamping seat 3 is used to place the optical fiber preform 6, and a clamping hole is provided on the clamping seat 3 along its sliding direction. The optical fiber preform 6 passes through the clamping hole, and the optical fiber preform 6 in the clamping hole is clamped and fixed by a clamping assembly. The quartz glass rod 7 passes through the limiting hole, the limiting hole is aligned with the clamping hole, and the inner diameter of the limiting hole and the clamping hole is roughly the same. The roller 4 is provided with a sliding hole, the sliding hole is vertical to the limiting hole, and the sliding hole includes two The two sliding holes are symmetrical with the axis of the roller 4 as the axis, and the two sliding holes are connected to the limiting hole. A group of positioning columns 5 includes two positioning columns 5, which are slidably installed in the corresponding sliding holes. The bottom end of the positioning column 5 presses the quartz glass rod 7 in the limiting hole. Driven by the relative movement of the two movable plates 2, one end of the optical fiber preform 6 and one end of the quartz glass plate gradually approach and contact each other. The junction of the optical fiber preform 6 and the quartz glass rod 7 is heated at high temperature by an external heating device, so that the position where the optical fiber preform 6 and the quartz glass rod 7 contact each other is fused together, and then the two movable plates 2 move back to back to complete the streamline taper forming of the optical fiber preform 6. When the above structure is in operation, after the streamline taper forming of the optical fiber preform 6 is completed and the connection between the optical fiber preform 6 and the quartz glass rod 7 is cut, the roller 4 is rotated by a certain angle to complete the reversal of the quartz glass rod 7, and the other end of the quartz glass rod 7 is used to continue the next taper processing, and the quartz glass rod 7 is quickly rotated and reversed without disassembly and assembly, which saves time and improves processing efficiency.
[0019] Based on the above embodiment, the bottom ends of the two movable plates 2 are fixedly provided with linkage columns 8, an elliptical plate 9 is rotatably provided between the two linkage columns 8, and the two linkage columns 8 are in sliding contact with the circumferential outer wall of the elliptical plate 9; Please refer to Figure 1 and 8 Two square holes are arranged at the bottom end of the slot plate 1, and the two square holes are symmetrical with the center of the slot plate 1 as the axis. The linkage column 8 passes through the square hole, and the linkage column 8 can slide horizontally in the square hole. The elliptical plate 9 is located below the slot plate 1, and when the distance between the two movable plates 2 is the largest, the two linkage columns 8 are respectively in contact with the circumferential outer wall of the corresponding elliptical plate 9 away from the center of the circle. A rotating shaft 10 is rotatably arranged at the bottom end of the slot plate 1, and the elliptical plate 9 is fixedly sleeved on the rotating shaft 10. A supporting spring 11 is arranged between the opposite ends of the two movable plates 2 and the corresponding inner wall of the slide groove; Furthermore, if Figure 1 and 2As shown, it also includes a chassis 12, a plurality of columns 13 are arranged on the top of the chassis 12, the slot plate 1 is fixed on the top of the chassis 12 through the plurality of columns 13, a chamber is arranged inside the chassis 12, a driving motor 14 is fixedly arranged in the chamber of the chassis 12, and the rotating shaft 10 rotates and penetrates the top wall of the chassis 12 and is in driving connection with the driving motor 14; During operation, the support spring 11 plays a role of resetting support for the moving plate 2, and when the distance between the two moving plates 2 is the largest, the support spring 11 is in a compressed state. When the driving motor 14 drives the elliptical plate 9 to rotate through the rotating shaft 10, under the action of the support spring 11, the linkage column 8 is always in contact with the circumferential outer wall of the elliptical plate 9. When the linkage column 8 is in contact with the circumferential outer wall of the elliptical plate 9 close to the center of the circle, the optical fiber preform 6 is in contact with the quartz glass rod 7. It should be noted here that when the two moving plates 2 make relative motion to the minimum distance, if the optical fiber preform 6 is not in contact with the quartz glass rod 7 at this time, that is, there is still a small section between the optical fiber preform 6 and the quartz glass rod 7. When there is a gap, the positions of the optical fiber preform 6 and the quartz glass rod 7 can be adjusted by adjusting the clamping assembly and the positioning column 5, so that the optical fiber preform 6 is in contact with the quartz glass rod 7. Of course, the above description is only in special cases. The structure in the embodiment of the present invention is for the optical fiber preform 6 and the quartz glass rod 7 of fixed length, and the gap between the optical fiber preform 6 and the quartz glass rod 7 is also a slight gap, and there will be no large gap. The rotation of the elliptical plate 9 drives the two movable plates 2 to move relative to or away from each other, so that the two movable plates 2 are very stable when moving relative to or away from each other, so that the tapering process of the optical fiber preform 6 is smoother and the working stability is high.
[0020] Based on the above embodiment, the limiting holes include several, several limiting holes are arranged equidistantly along the axis direction of the roller 4, several limiting holes are arranged in an equal angle circular array, the number of groups of positioning columns 5 is the same as the number of limiting holes, several groups of positioning columns 5 are fixedly provided with connecting plates 15 on the top, the roller 4 is coaxially fixedly provided with a rotating column 16 at the bottom, a cross telescopic groove is provided at the bottom of the rotating column 16, a cross fixing frame 17 is slidably provided in the cross telescopic groove, the bottom end of the cross fixing frame 17 is rotatably installed on the corresponding movable plate 2, and three spiral slide grooves are provided on the circumferential outer wall of the rotating column 16 18, the three spiral grooves 18 are divided into a first spiral groove 18a, a second spiral groove 18b and a third spiral groove 18c, the first spiral groove 18a and the second spiral groove 18b are equidistantly arranged on the circumferential outer wall of the rotating column 16, the lowest point of the first spiral groove 18a is connected to the highest point of the second spiral groove 18b through the third spiral groove 18c, a support plate 19 is fixedly provided on the moving plate 2, a guide column 20 is fixedly provided on one end of the support plate 19 facing the rotating column 16, and the guide column 20 is slidably installed at the lowest point of the first spiral groove 18a at one end facing away from the support plate 19; For details, please refer to Figure 3 and4 In the embodiment of the present invention, three limiting holes are used as an example for demonstration. The center positions of the three limiting holes are staggered, and the interval angle between two adjacent limiting holes in the three limiting holes is 60 degrees. When the roller 4, the rotating column 16 and the cross fixing frame 17 rotate, since the position of the guide column 20 is fixed, the guide column 20 slides from the lowest point of the first spiral groove 18a to the highest point of the first spiral groove 18a, and the rotating column 16 continuously moves downward. When the guide column 20 slides from the highest point of the third spiral groove 18c to the lowest point of the third spiral groove 18c, the rotating column 16 continuously moves upward. When the guide column 20 slides from the lowest point of the second spiral groove 18b to the highest point of the second spiral groove 18b, the rotating column 16 continuously moves downward again. Figure 3 , the process of the roller 4 driving the quartz glass rod 7 to rotate and reverse is described as follows (the two ends of the quartz glass rod 7 are described as end A and end B below): 1. When the guide post 20 is located at the lowest point of the first spiral groove 18a, the end A of the quartz glass rod 7 located at the bottom is aligned with and opposite to the optical fiber preform rod 6; Second, the two movable plates 2 move relative to each other to complete the fusion bonding between the end A of the quartz glass rod 7 and the end of the optical fiber preform rod 6; 3. The two movable plates 2 move in opposite directions to complete the taper processing of the optical fiber preform 6, and cut the connection between the quartz glass rod 7 and the optical fiber preform 6; Fourth, the rotating column 16 drives the roller 4 and the cross fixing frame 17 to rotate synchronously by 60 degrees and stop. At this time, the A end of the quartz glass rod 7 in the middle is aligned and opposite to the new optical fiber preform rod 6, and the process of the third and fourth steps is repeated; Fifth, the rotating column 16 drives the roller 4 and the cross fixing frame 17 to rotate synchronously by 60 degrees again and stop. At this time, the A end of the quartz glass rod 7 located above is aligned and opposite to the new optical fiber preform rod 6, and the process of the third and fourth steps is repeated; 6. The rotating column 16 then drives the roller 4 and the cross fixing frame 17 to rotate synchronously by 60 degrees and stop. At this time, the B end of the quartz glass rod 7 located below is aligned and opposite to the new optical fiber preform rod 6, and the process of the third and fourth steps is repeated; 7. The rotating column 16 drives the roller 4 and the cross fixing frame 17 to rotate synchronously by 60 degrees and stop. At this time, the B end of the quartz glass rod 7 in the middle is aligned and opposite to the new optical fiber preform rod 6, and the process of the third and fourth steps is repeated; 8. The rotating column 16 drives the roller 4 and the cross fixing frame 17 to rotate synchronously by 60 degrees and stop. At this time, the B end of the quartz glass rod 7 located above is aligned and opposite to the new optical fiber preform rod 6, and the process of the third and fourth steps is repeated; From the above eight steps, it can be seen that the intermittent rotation of the rotating column 16 can complete the reversal of the quartz glass rod 7, and a plurality of quartz glass rods 7 can be docked at one time, and both ends of the quartz glass rod 7 can be fully utilized, saving raw materials, with high economy, and saving time in the working process, with high work efficiency.
[0021] Based on the above embodiment, the clamping assembly includes two driving plates 21, which are located on both sides of the clamping seat 3. The two driving plates 21 move relative to or away from each other. Two groups of through holes are provided on both sides of the clamping seat 3. The through holes are connected to the clamping holes. Clamping columns 22 are slidably provided in the through holes. Each group of through holes includes two through holes that are symmetrical up and down. One end of the two clamping columns 22 that are symmetrical up and down and located in the clamping holes is provided with an inclined surface, and one end of the clamping column 22 that is back to the clamping hole is fixedly connected to the corresponding driving plate 21; The optical fiber preform 6 is passed through the clamping hole, and the two driving plates 21 make relative movement, and the two driving plates 21 drive the corresponding clamping columns 22 to make relative movement, and the optical fiber preform 6 is clamped and fixed by the clamping columns 22 on both sides of the optical fiber preform 6; More specifically, a double-headed motor 23 is fixedly arranged at the top of the clamping seat 3, and threaded shafts 24 are arranged at the two output ends of the double-headed motor 23, and the driving plate 21 is threadedly sleeved on the corresponding threaded shafts 24, and a baffle 25 is fixedly arranged at one end of the threaded shaft 24 facing away from the double-headed motor 23; During operation, the double-headed motor 23 drives the two threaded shafts 24 to rotate synchronously, and the rotation of the two threaded shafts 24 drives the two driving plates 21 to move relative to each other. The double-headed motor 23 automatically drives the two driving plates 21, with high automation efficiency and efficient operation.
[0022] Based on the above embodiment, a transmission motor 26 is fixedly arranged on the support plate 19, a transmission shaft 27 is arranged at the output end of the transmission motor 26, a gear 28 is fixedly arranged at one end of the transmission shaft 27 facing away from the transmission motor 26, the height of the gear 28 is greater than the stroke of the rotating column 16, a gear ring 29 is fixedly sleeved on the circumferential outer wall of the rotating column 16, and the gear 28 is meshed with the gear ring 29; In combination with the above structure, when the embodiment of the present invention is implemented, the transmission motor 26 drives the gear 28 to rotate, the gear 28 drives the ring gear 29 to rotate, the ring gear 29 drives the rotating column 16 to rotate, and the rotating column 16 moves downward during the rotation. During the downward movement of the rotating column 16, the gear 28 and the ring gear 29 are always in a meshing state. Through the meshing transmission mode of the gear 28 and the ring gear 29, the rotation of the rotating column 16 is automatically completed, with a high degree of automation and high work efficiency.
[0023] Based on the above embodiment, a mounting frame 30 is fixedly provided at the top of the roller 4, a cylinder 31 is fixedly provided on the mounting frame 30, a telescopic shaft 32 is provided at the output end of the cylinder 31, and one end of the telescopic shaft 32 facing away from the cylinder 31 is fixedly connected to the connecting plate 15; During use, the cylinder 31 drives the connecting plate 15 to move downward through the telescopic shaft 32, and the connecting plate 15 drives the positioning column 5 to move downward, and the quartz glass rod 7 is pressed and fixed by the positioning column 5. Figure 4 The lengths of several groups of positioning columns 5 are determined by the heights of the corresponding limiting holes, making the fixing method of the quartz glass rod 7 simpler and more efficient.
[0024] Based on the above embodiment, a box opening is provided at the front end of the chassis 12, the box opening is connected to the chamber, two door panels 33 are hingedly opened at the box opening, handles 34 are fixedly provided on the two door panels 33, heat dissipation holes 35 are provided on the side walls of the chassis 12, and support feet 36 are provided at the bottom of the chassis 12.
[0025] Based on the above embodiment, a plurality of support springs 11 are provided, and the plurality of support springs 11 are arranged equidistantly. The plurality of support springs 11 arranged equidistantly make the elastic support for the moving plate 2 more stable.
[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.
Claims
1. A taper forming device for preparing optical fiber preform, characterized in that: The invention comprises a slot plate (1), on which two movable plates (2) are slidably arranged relative to or opposite to each other, one of the movable plates (2) is fixedly provided with a clamping seat (3), and the clamping seat (3) is provided with a clamping assembly, and the other movable plate (2) is rotatably provided with a roller (4), a limiting hole is radially provided through the roller (4), and a group of positioning columns (5) are slidably provided on the roller (4).
2. The taper forming device for preparing optical fiber preform according to claim 1, characterized in that: A linkage column (8) is fixedly provided at the bottom end of each of the two movable plates (2); an elliptical plate (9) is rotatably provided between the two linkage columns (8); the two linkage columns (8) are in sliding contact with the circumferential outer wall of the elliptical plate (9); and a support spring (11) is provided between the opposite ends of the two movable plates (2) and the inner wall of the corresponding slide groove; It also includes a chassis (12), and the slot plate (1) is fixed above the chassis (12).
3. The taper forming device for preparing optical fiber preform according to claim 1, characterized in that: The limiting holes include a plurality of them, and the plurality of limiting holes are arranged equidistantly along the axis direction of the roller (4). The plurality of limiting holes are arranged in an equiangular circumferential array. The number of groups of the positioning posts (5) is the same as the number of the limiting holes. A connecting plate (15) is fixedly arranged at the top of the plurality of groups of the positioning posts (5). A rotating post (16) is coaxially fixedly arranged at the bottom end of the roller (4). A cross telescopic groove is arranged at the bottom end of the rotating post (16). A cross fixing frame (17) is slidably arranged in each of the cross telescopic grooves. The bottom end of the cross fixing frame (17) is rotatably mounted on the corresponding moving plate (2). Three spiral grooves (18) are arranged on the circumferential outer wall of the rotating post (16). The three spiral grooves (18) are arranged on the outer wall of the rotating post (16). The spiral groove (18) is divided into a first spiral groove (18a), a second spiral groove (18b) and a third spiral groove (18c); the first spiral groove (18a) and the second spiral groove (18b) are equidistantly arranged on the circumferential outer wall of the rotating column (16); the lowest point of the first spiral groove (18a) and the highest point of the second spiral groove (18b) are connected via the third spiral groove (18c); a support plate (19) is fixedly arranged on the movable plate (2); a guide column (20) is fixedly arranged on one end of the support plate (19) facing the rotating column (16); and the guide column (20) is slidably mounted on the lowest point of the first spiral groove (18a) at one end facing away from the support plate (19).
4. The taper forming device for preparing optical fiber preform according to claim 1, characterized in that: The clamping assembly comprises two driving plates (21), the two driving plates (21) are located on both sides of the locking seat (3), the two driving plates (21) move relative to or away from each other, two groups of through holes are provided on both sides of the locking seat (3), the through holes are connected to the locking hole, clamping columns (22) are slidably provided in the through holes, each group of through holes comprises two through holes symmetrically arranged in an upper and lower direction, one end of the two clamping columns (22) symmetrically arranged in the locking hole is provided with an inclined surface, and the end of the clamping column (22) facing away from the locking hole is fixedly connected to the corresponding driving plate (21).
5. The taper forming device for preparing optical fiber preform according to claim 3, characterized in that: A transmission motor (26) is fixedly arranged on the support plate (19); a transmission shaft (27) is arranged at the output end of the transmission motor (26); a gear (28) is fixedly arranged at one end of the transmission shaft (27) facing away from the transmission motor (26); a height of the gear (28) is greater than the stroke of the rotating column (16) when it is lifted or lowered; a gear ring (29) is fixedly sleeved on the circumferential outer wall of the rotating column (16); and the gear (28) meshes with the gear ring (29).
6. The taper forming device for preparing optical fiber preform according to claim 1, characterized in that: A mounting frame (30) is fixedly provided at the top end of the roller (4), a cylinder (31) is fixedly provided on the mounting frame (30), a telescopic shaft (32) is provided at the output end of the cylinder (31), and one end of the telescopic shaft (32) facing away from the cylinder (31) is fixedly connected to the connecting plate (15).
7. The taper forming device for preparing optical fiber preform according to claim 2, characterized in that: The front end of the chassis (12) is provided with a box opening, the box opening being in communication with the chamber, two door panels (33) being hingedly arranged at the box opening, handles (34) being fixedly arranged on the two door panels (33), heat dissipation holes (35) being arranged on the side walls of the chassis (12), and supporting feet (36) being arranged at the bottom end of the chassis (12).
8. The taper forming device for preparing optical fiber preform according to claim 2, characterized in that: The support springs (11) are arranged in a plurality, and the plurality of support springs (11) are arranged at equal distances. The plurality of support springs (11) arranged at equal distances make the elastic support for the movable plate (2) more stable.