CN113735433B - A fusion splicing device for optical fiber manufacturing - Google Patents

Abstract

The application discloses fusion splicing equipment for optical fiber manufacturing includes: the base comprises a base body and a vertical plate fixed on the base body, wherein a first track is arranged on the vertical plate; the L-shaped frame comprises a first part and a second part which are movably matched with the first rail, and the second part is provided with a chuck; the two moving seats are slidably arranged on the seat body; the first driving mechanism is a blowtorch lamp holder and is slidably arranged on the movable seat, and a blowtorch is arranged on the blowtorch lamp holder; the second driving mechanism supports the protective seat and is arranged on the first part through the screw rod mechanism; a third drive mechanism, a locking mechanism. When the fusion welding equipment is used for fusing the auxiliary rod and the prefabricated rod, the auxiliary rod and the prefabricated rod are not moved, flame circumferentially reciprocates at the junction of the prefabricated rod and the auxiliary rod, and the auxiliary rod and the prefabricated rod with poor flatness can be fused by the heating mode; compared with the existing method of observing whether the welding is qualified through manual work, the welding strength can be more reliably detected by applying acting force to the auxiliary rod.

Description

A fusion splicing device for optical fiber manufacturing

This application is a divisional application with an application date of August 8, 2018, an application number of 2018108952631, and an invention title of "Method for Manufacturing Optical Fiber".

technical field

The invention relates to the field of optical fibers, in particular to a method for manufacturing optical fibers.

Background technique

In optical fiber manufacturing, it is necessary to flame grind the preform before the drawing process. Before the flame grinding of the preform, an auxiliary rod is welded to each end of the preform, and then the two chucks hold the corresponding auxiliary rods respectively. When the two chucks rotate at the same speed, the preform and auxiliary rods are driven to rotate, and the preform is burned at high temperature through a movable blowtorch. The blowtorch uses hydrogen as fuel and can generate a high temperature of about 2300°C. Remove impurities and dust on the surface of the preform, heal the fine cracks on the surface of the preform, and increase the strength of the optical fiber after drawing. The flame grinding process reduces or eliminates the unevenly distributed internal stress in the preform through the high-temperature annealing process.

This existing operation has the following defects:

1. When the preform with poor flatness is welded with the auxiliary rod, the end of the preform will shake, which will seriously affect the welding operation.

2. After the welding is completed, whether the welding is qualified mainly depends on the naked eye observation. This form of judgment is prone to mistakes. If the judgment is wrong, the welding part of the unqualified preform will break during the transportation or wire drawing process, resulting in greater losses. .

Contents of the invention

Aiming at the above problems, the present invention overcomes at least one deficiency and proposes a method for manufacturing an optical fiber.

The technical scheme that the present invention takes is as follows:

A method of manufacturing an optical fiber, comprising the steps of:

1) Clamp an auxiliary rod so that it is in a vertical state, place the preform vertically, and align the upper end of the preform with the lower end of the auxiliary rod;

2) Control the flame to reciprocate in the circumferential direction at the junction of the preform rod and the auxiliary rod, control the rise of the preform rod, so that the preform rod and the auxiliary rod are extruded and welded into one body;

3) Cool the welded auxiliary rod and preform;

4) Apply force to the auxiliary rod to make the auxiliary rod and preform move at the set acceleration a for a set distance or for a set time. After the movement is over, observe whether the weld is cracked or broken. If there is no crack or break, proceed to the next step process, if it cracks or breaks, it is judged that the fusion has failed, and the preform and auxiliary rods are moved to the rework area;

5) Perform high-temperature annealing treatment on the preform;

6) Put the high-temperature annealed preform into the wire drawing furnace for wire drawing.

In the method of the present application, when welding the auxiliary rod and the preform rod, the auxiliary rod and the preform rod do not move, and the flame reciprocates circumferentially at the junction of the preform rod and the auxiliary rod. This heating method can weld the auxiliary rod and the poor flatness Prefabricated rod; compared with the existing manual inspection of whether the welding is qualified, by applying force to the auxiliary rod, the auxiliary rod and the preformed rod will move at a set acceleration a for a set distance or for a set time. The welding strength can be detected more reliably.

"If it is cracked or broken, it is judged that the fusion has failed, and the preform and auxiliary rods are moved to the rework area", which means that the preform and auxiliary rods are moved to other locations, and the workers will reprocess the preform and auxiliary rods that failed to weld , and can be re-spliced later.

In practical application, the range of acceleration a: 1.5~2.

In actual use, the movement distance can be 100mm~500mm.

In actual use, the setting time can be 1s~3s.

In one embodiment of the present invention, the steps 1) to 4) are operated by welding equipment, and the welding equipment includes:

The base includes a horizontally arranged base body and a riser fixed on the base body, and the riser has a first track;

The L-shaped frame includes a first part that is movably matched with the first track and a second part that is arranged on the upper end of the first part and extends outwards, the second part is provided with a chuck for clamping the auxiliary rod, and the chuck has a The axis is set vertically;

Two moving seats are slidably installed on the seat body, and the two moving seats are respectively located on both sides of the L-shaped frame;

a first driving mechanism, used to drive the moving seat to approach or move away from the L-shaped frame;

The blowtorch lamp holder is slidingly installed on the moving seat. The side of the blowtorch lamp holder near the L-shaped frame has an arc-shaped notch. The blowtorch lamp holder is installed with a blowtorch that can rotate around a vertical axis. When approaching each other, the two arc-shaped notches cooperate with each other to cover the outer wall of the preform;

The second driving mechanism is used to drive the lamp base of the blowtorch to reciprocate up and down;

The support and protection seat is installed on the first part through the screw mechanism, and the support and protection seat can move up and down along the first part. The support and protection seat has a limit sleeve that is overlaid on the outer wall of the preform rod and used to limit the vertical position of the preform rod. It also has A flexible pad for mating with the bottom of the preform;

The third drive mechanism is used to control the movement of the L-shaped frame relative to the first track;

The locking mechanism is used to lock or unlock the first part. When the first part is locked, the first part is relatively fixed to the riser. When the first part is unlocked, the first part can move up and down relative to the riser.

The working principle and process of welding equipment: the auxiliary rod is clamped vertically by the chuck, and the preform is limited and supported by the support protection seat, so that the preform rod is set vertically, and the support protection seat and the preform rod can be driven by the screw mechanism Move the upper end of the preform rod to align with the lower end of the auxiliary rod, and then use the first driving mechanism to make the two blowtorch lamp holders close to each other, and the two arc-shaped notches cooperate with each other to cover the outer wall of the preform rod. The second driving mechanism adjusts the position of the blowtorch lamp holder so that the blowtorch is located at the junction of the preform rod and the auxiliary rod, the blowtorch is ignited, and through the reciprocating rotation of the blowtorch, the junction of the preform rod and the auxiliary rod can be heated to make it in a molten state. During this process, the screw mechanism drives the supporting protection seat and the preform rod to slowly move up, and finally the preform rod and the auxiliary rod are extruded and welded into one body. After the welding is completed, natural cooling is carried out. After the cooling is completed, test the welding strength. The specific process is as follows: drive the support and protection seat to move down through the screw mechanism. At this time, the flexible pad of the support and protection seat is no longer in contact with the preform. The frame moves upwards relative to the first rail (moving with the set acceleration a to set the distance or the set time of movement), after the movement is over, check whether the weld is cracked or broken, if there is no crack or break, proceed to the next process, if cracked or broken, it is determined that the fusion has failed, and the preform and auxiliary rods are moved to the rework area.

Although the support and protection seat no longer supports the weight of the preform, when the L-shaped frame moves, the support and protection seat can move synchronously. Such arrangement makes the preform rod not drop and damage even if the welding strength is insufficient and the weld part breaks during accelerated movement, the preform rod will fall into the support protection seat, and the bottom of the preform rod contacts the flexible pad.

In practical application, the first track may be a dovetail groove, and the first part may be provided with a slider adapted to the dovetail groove.

In practice, in order to fit the preform rod, preferably, the upper part of the flexible pad has a concave cone-shaped structure.

In one embodiment of the present invention, the burner lamp holder includes:

The lamp holder body, the part of the upper surface of the lamp holder body adjacent to the arc-shaped notch has two arc-shaped grooves distributed at intervals, and the one adjacent to the arc-shaped notch is the first arc-shaped groove, which is far away from the arc-shaped groove. The notch is a second arc-shaped groove, the axes of the side walls of the two arc-shaped grooves coincide, and the inner wall of the first arc-shaped groove is provided with a rack;

The torch frame is fixedly equipped with a first motor, the output shaft of the first motor cooperates with the rack through a gear, and the torch is installed on the torch frame;

One end of the limit rod is relatively fixed to the torch holder, and the other end extends into the second arc-shaped groove.

There are four arc-shaped side walls in the arc-shaped groove of each lamp holder body, and the axes of the four arc-shaped side walls coincide; the axis of the side walls refers to the position of each point on the side wall and a straight line The distances are equal, this straight line is the axis of the side wall. The structure of the blowtorch holder enables the blowtorch holder to reciprocate along the first arc-shaped groove, thereby driving the blowtorch to reciprocate along the circumferential direction of the preform rod. The two blowtorch lamp holders cooperate with each other to realize the preform circumferential direction. High temperature welding operation.

In actual use, after the welding is completed and the strength of the test is qualified, the blowtorch can move along the axis of the preform and rotate around the axis of the preform through the drive of the second driving mechanism, that is, the welding equipment of the present application can perform high-temperature heating on the preform. Annealing treatment.

In one embodiment of the present invention, the first driving mechanism is an air cylinder, an oil cylinder or a linear motor, and the second driving mechanism is an air cylinder, an oil cylinder or a linear motor.

In one embodiment of the present invention, the third driving mechanism includes:

Turn the guide wheel installed on the top of the riser;

The winding wheel is arranged at the lower part of the vertical plate, and the winding wheel and the L-shaped frame are respectively located on both sides of the vertical plate;

A winding motor, used to drive the winding wheel to rotate;

One end of the drag cable is fixed with the winding wheel, and the other end is fixed with the second part of the L-shaped frame after walking around the guide wheel.

Driven by the winding motor, the dragline can be wound up on the winding wheel, and at this moment, the L-shaped frame can be pulled for accelerated motion.

In one embodiment of the present invention, the first part has a limiting step, the vertical plate is fixed to a limiting plate, and the limiting plate is used to cooperate with the limiting step to limit the lowest position of the L-shaped frame.

Setting the limit step and the limit plate can facilitate the positioning of the L-shaped frame.

In one embodiment of the present invention, the locking mechanism includes:

A plurality of positioning holes are arranged at intervals up and down on the side wall of the first part;

The fixing plate is fixed on the vertical plate and is located on one side of the first part, and a through hole is arranged on the fixing plate;

The positioning pin is movable through the through hole, and the first end of the positioning pin is used to penetrate into the corresponding positioning hole so that the riser and the first part are relatively fixed;

The control cylinder is installed on the riser, the piston rod end of the control cylinder is fixed to the second end of the positioning pin, and the control cylinder is used to control the reciprocating movement of the positioning pin.

The L-shaped frame can be locked or unlocked by controlling the cylinder.

In one embodiment of the present invention, the screw mechanism includes:

The vertical screw rod is installed in the first part by rotation;

The second track, fixed to the first part;

The nut block is overlaid on the screw rod and threaded with the screw rod, the outer wall of the nut block is slidably matched with the first track, and the support and protection seat is fixed on the nut block;

The second motor is used to drive the screw to rotate.

Driven by the second motor, the screw mandrel rotates, which can drive the nut block and the support protection seat to move up and down.

In one embodiment of the present invention, the second track is a trapezoidal block, and the nut block has a trapezoidal groove matching the trapezoidal block.

In one embodiment of the present invention, the sidewall of the arc-shaped recess has a graphite layer. The graphite layer is provided without contaminating the surface of the preform.

The beneficial effects of the present invention are: when the method of the present application welds the auxiliary rod and the preform rod, the auxiliary rod and the preform rod do not move, and the flame reciprocates circumferentially at the junction of the preform rod and the auxiliary rod. This heating method can weld the auxiliary rod. Rods and preforms with poor straightness; compared with the existing manual inspection of whether the welding is qualified, by applying force to the auxiliary rods, the auxiliary rods and preforms can be moved at a set acceleration a for a set distance or motion Set the time, this way can detect the welding strength more reliably.

Description of drawings:

Fig. 1 is the flowchart of the manufacturing method of optical fiber of the present invention;

The schematic diagram of the structure of the welding equipment in Fig. 2;

Fig. 3 is a schematic diagram of another angle of the welding equipment;

Fig. 4 is an enlarged view at A in Fig. 2 .

Each reference mark in the figure is:

1. Base; 2. Base body; 3. Riser; 4. L-shaped frame; 5. First part; 6. Second part; 7. Chuck; 8. Auxiliary rod; 9. Prefabricated rod; 10. Moving 11, the first drive mechanism; 12, blowtorch lamp holder; 13, arc-shaped notch; 14, the second drive mechanism; 15, blowtorch; 16, support protection seat; 17, limit sleeve; 18, flexible pad ; 19, the lamp holder body; 20, the first arc groove; 21, the second arc groove; 22, the torch holder; 23, the limit rod; 24, the guide wheel; 25, the winding wheel; 26, the receipt Roller motor; 27, cable; 28, limit step; 29, limit plate; 30, positioning hole; 31, fixed plate; 32, positioning pin; 33, control cylinder; 34, screw mandrel; 35, second track ; 36, the nut block; 37, the second motor.

Detailed ways:

Below in conjunction with each accompanying drawing, the present invention is described in detail.

As shown in Figure 1, a kind of manufacturing method of optical fiber comprises the following steps:

1) Clamp an auxiliary rod so that it is in a vertical state, place the preform vertically, and align the upper end of the preform with the lower end of the auxiliary rod;

2) Control the flame to reciprocate in the circumferential direction at the junction of the preform rod and the auxiliary rod, control the rise of the preform rod, so that the preform rod and the auxiliary rod are extruded and welded into one body;

3) Cool the welded auxiliary rod and preform;

4) Apply force to the auxiliary rod to make the auxiliary rod and preform move at the set acceleration a for a set distance or for a set time. After the movement is over, observe whether the weld is cracked or broken. If there is no crack or break, proceed to the next step process, if it cracks or breaks, it is judged that the fusion has failed, and the preform and auxiliary rods are moved to the rework area;

5) Perform high-temperature annealing treatment on the preform;

6) Put the high-temperature annealed preform into the wire drawing furnace for wire drawing.

In the method of the present application, when welding the auxiliary rod and the preform rod, the auxiliary rod and the preform rod do not move, and the flame reciprocates circumferentially at the junction of the preform rod and the auxiliary rod. This heating method can weld the auxiliary rod and the poor flatness Prefabricated rod; compared with the existing manual inspection of whether the welding is qualified, by applying force to the auxiliary rod, the auxiliary rod and the preformed rod will move at a set acceleration a for a set distance or for a set time. The welding strength can be detected more reliably.

"If it is cracked or broken, it is judged that the fusion has failed, and the preform and auxiliary rods are moved to the rework area", which means that the preform and auxiliary rods are moved to other locations, and the workers will reprocess the preform and auxiliary rods that failed to weld , and can be re-spliced later.

In practical application, the range of acceleration a: 1.5~2.

In actual use, the movement distance can be 100mm~500mm.

In actual use, the setting time can be 1s~3s.

As shown in Figures 2, 3 and 4, in this embodiment, steps 1) to 4) are operated through welding equipment, and the welding equipment includes:

The base 1 includes a horizontally arranged seat body 2 and a riser 3 fixed on the seat body 2, and the riser 3 has a first track (not shown in the figure);

The L-shaped frame 4 includes a first part 5 that is movably matched with the first track and a second part 6 that is arranged on the upper end of the first part 5 and extends outward. The second part 6 is provided with a chuck 7 for clamping an auxiliary rod 8, The axis of the chuck 7 is vertically arranged;

Two moving seats 10 are slidably installed on the seat body 2, and the two moving seats 10 are respectively located on both sides of the L-shaped frame 4;

The first driving mechanism 11 is used to drive the moving base 10 to approach or move away from the L-shaped frame 4;

Blowtorch lamp holder 12 is slidably installed on the moving seat 10. The side of the blowtorch lamp holder 12 near the L-shaped frame 4 has an arc-shaped notch 13. The blowtorch lamp holder 12 is equipped with a blowtorch that can reciprocate around a vertical axis. 15. When the two blowtorch lamp holders 12 are close to each other, the two arc-shaped notches 13 cooperate with each other to cover the outer wall of the preform rod 9;

The second driving mechanism 14 is used to drive the blowtorch lamp base 12 to move up and down;

The support and protection seat 16 is installed on the first part 5 through the screw rod 34 mechanism, and the support and protection seat 16 can move up and down along the first part 5. The support and protection seat 16 has a sleeve on the outer wall of the preform rod 9 and is used to limit the vertical direction of the preform rod 9. The position-limiting sleeve 17 also has a flexible pad 18 for cooperating with the bottom of the preform rod 9;

The third driving mechanism is used to control the movement of the L-shaped frame 4 relative to the first track;

The locking mechanism is used to lock or unlock the first part 5. When the first part 5 is locked, the first part 5 is relatively fixed to the riser 3. When the first part 5 is unlocked, the first part 5 can move up and down relative to the riser 3.

The working principle and process of the welding equipment: the auxiliary rod 8 is clamped vertically by the chuck 7, and the preform rod 9 is limited and supported by the support protection seat 16, so that the preform rod 9 is vertically arranged, and the support can be driven by the screw rod 34 mechanism The protection seat 16 and the preform rod 9 are moved up, so that the upper end of the preform rod 9 is aligned with the lower end of the auxiliary rod 8, and then the first drive mechanism 11 is used to make the two torch lamp holders 12 close to each other, and the two arc-shaped notches 13 Cooperate with each other to cover the outer wall of the preform rod 9, adjust the position of the blowtorch lamp holder 12 through the second drive mechanism 14, so that the blowtorch 15 is located at the junction of the preform rod 9 and the auxiliary rod 8, the blowtorch 15 is ignited, and the reciprocating motion of the blowtorch 15 Rotate to heat the junction of the preform rod 9 and the auxiliary rod 8 to make it in a molten state. At this time, the screw mandrel 34 mechanism drives the supporting protection seat 16 and the preform rod 9 to move upward slowly, finally making the preform rod 9 and the auxiliary rod 9 The rods 8 are mutually extruded and welded into one body, and after the welding is completed, they are naturally cooled. After the cooling is completed, test the welding strength. The specific process is as follows: the screw rod 34 mechanism drives the support and protection seat 16 to move down. At this time, the flexible pad 18 of the support and protection seat 16 is no longer in contact with the preform rod 9, the locking mechanism is unlocked, and the third drive The mechanism works to drive the L-shaped frame 4 to move upwards relative to the first track (moving with the set acceleration a to set the distance or the set time of movement), after the movement is completed, check whether the weld is cracked or broken, and if there is no crack or break, proceed In the next step, if it cracks or breaks, it is judged that the fusion has failed, and the preform rod 9 and the auxiliary rod 8 are moved to the rework area.

Although the support and protection seat 16 no longer supports the weight of the preform rod 9, when the L-shaped frame 4 moves, the support and protection seat 16 will move synchronously. This arrangement makes the preform 9 not drop and damage even if the weld is not strong enough and the weld is broken during accelerated movement.

In practical application, the first track may be a dovetail groove, and the first part 5 may be provided with a slider adapted to the dovetail groove.

In practice, in order to fit the bottom of the preform rod 9, preferably, the upper part of the flexible pad 18 has a concave cone-shaped structure.

As shown in Figures 2 and 4, in this embodiment, the blowtorch lamp holder 12 includes:

The lamp holder body 19, the upper surface of the lamp holder body 19 adjacent to the arc-shaped notch 13 has two arc-shaped grooves distributed at intervals, and the first arc-shaped groove 20 adjacent to the arc-shaped notch 13 , away from the arc-shaped notch 13 is the second arc-shaped groove 21, the axes of the side walls of the two arc-shaped grooves coincide, and the inner wall of the first arc-shaped groove 20 is provided with a rack (omitted in the figure not shown);

The torch frame 22 is fixedly installed with a first motor (not shown in the figure), the output shaft of the first motor cooperates with the rack through a gear, and the torch 15 is installed on the torch frame 22;

One end of the limiting rod 23 is relatively fixed to the torch holder 22 , and the other end extends into the second arc-shaped groove 21 .

There are four arc-shaped side walls of the arc-shaped grooves of each lamp holder body 19, and the axes of the four arc-shaped side walls coincide; The distances between the lines are equal, and this straight line is the axis of the side wall. This structural form of the blowtorch holder 12 enables the blowtorch holder 22 to reciprocate along the first arc-shaped groove 20, thereby driving the blowtorch 15 to reciprocate along the circumference of the preform rod 9, and the two blowtorch holders 12 cooperate with each other to be able to Realize the high-temperature welding operation of the 9-week upwards of the preform.

In actual use, after the welding is completed and the test strength is qualified, the blowtorch 15 can move along the axis of the preform rod 9 and rotate around the axis of the preform rod 9 through the drive of the second drive mechanism 14, that is, the welding equipment of the present application can The preform rod 9 is subjected to high temperature annealing treatment.

In this embodiment, the first driving mechanism 11 is an air cylinder, an oil cylinder or a linear motor, and the second driving mechanism 14 is an air cylinder, an oil cylinder or a linear motor.

As shown in Figures 2 and 3, in this embodiment, the third drive mechanism includes:

Rotate the guide wheel 24 installed on the upper end of the riser 3;

The winding wheel 25 arranged at the lower part of the vertical plate 3, the winding wheel 25 and the L-shaped frame 4 are respectively located on both sides of the vertical plate 3;

Winding motor 26, used to drive the winding wheel 25 to rotate;

Drag cable 27, one end is fixed with winding wheel 25, and the other end is fixed with the second part 6 of L-shaped frame 4 behind the guide wheel 24.

Driven by the winding motor 26, the dragline 27 can be wound up on the winding wheel 25, and now the L-shaped frame 4 can be pulled to perform accelerated motion.

As shown in Figure 2, in this embodiment, the first part 5 has a limit step 28, the vertical plate 3 is fixed with a limit plate 29, and the limit plate is used to cooperate with the limit step 28 to limit the lowest position of the L-shaped frame 4 . Setting the limit step 28 and the limit plate 29 can facilitate the positioning of the L-shaped frame 4 .

As shown in Figure 2, in this embodiment, the locking mechanism includes:

A plurality of positioning holes 30 are arranged at intervals up and down on the side wall of the first part 5;

The fixing plate 31 is fixed on the vertical plate 3 and is located on one side of the first part 5, and the fixing plate 31 is provided with a through hole (not marked in the figure);

The positioning pin 32 is movable through the through hole, and the first end of the positioning pin 32 is used to penetrate into the corresponding positioning hole 30 so that the riser 3 and the first part 5 are relatively fixed;

The control cylinder 33 is installed on the vertical plate 3, the piston rod end of the control cylinder 33 is fixed with the second end of the positioning pin 32, and the control cylinder 33 is used to control the reciprocating movement of the positioning pin 32.

The L-shaped frame 4 can be locked or unlocked by controlling the cylinder 33 .

As shown in Figure 2, in the present embodiment, the screw mandrel 34 mechanism includes:

The vertical screw mandrel 34 is installed in rotation on the first part 5;

the second track 35, fixed to the first part 5;

The nut block 36 is overcoated on the screw mandrel 34, and is threadedly matched with the screw mandrel 34, and the outer wall of the nut block 36 is slidably matched with the first track, and the support protection seat 16 is fixed on the nut block 36;

The second motor 37 is used to drive the screw mandrel 34 to rotate.

Driven by the second motor 37 , the threaded mandrel 34 rotates, which can drive the nut block 36 and the support and protection seat 16 to move up and down.

In this embodiment, the second track 35 is a trapezoidal block, and the nut block 36 has a trapezoidal groove matching the trapezoidal block.

In actual use, the sidewall of the arc-shaped recess 13 has a graphite layer (not shown in the figure). Setting the graphite layer will not pollute the surface of the preform 9 .

The above is only a preferred embodiment of the present invention, and does not limit the scope of patent protection of the present invention. Any equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings is directly or indirectly used in other related technical fields. All are equally included in the scope of protection of the present invention.

Claims (8)

1. A fusion splicing device for optical fiber manufacturing, characterized in that it comprises: The base includes a horizontally arranged base body and a riser fixed on the base body, and the riser has a first track; The L-shaped frame includes a first part that is movably matched with the first track and a second part that is arranged on the upper end of the first part and extends outwards, the second part is provided with a chuck for clamping the auxiliary rod, and the chuck has a The axis is set vertically; Two moving seats are slidably installed on the seat body, and the two moving seats are respectively located on both sides of the L-shaped frame; a first driving mechanism, used to drive the moving seat to approach or move away from the L-shaped frame; The blowtorch lamp holder is slidingly installed on the moving seat. The side of the blowtorch lamp holder near the L-shaped frame has an arc-shaped notch. The blowtorch lamp holder is installed with a blowtorch that can rotate around a vertical axis. When approaching each other, the two arc-shaped notches cooperate with each other to cover the outer wall of the preform; The second driving mechanism is used to drive the lamp base of the blowtorch to reciprocate up and down; The support and protection seat is installed on the first part through the screw mechanism, and the support and protection seat can move up and down along the first part. The support and protection seat has a limit sleeve that is overlaid on the outer wall of the preform rod and used to limit the vertical position of the preform rod. It also has A flexible pad for mating with the bottom of the preform; The third drive mechanism is used to control the movement of the L-shaped frame relative to the first track; The locking mechanism is used to lock or unlock the first part. When the first part is locked, the first part is relatively fixed to the riser, and when the first part is unlocked, the first part can move up and down relative to the riser; The third drive mechanism includes: Turn the guide wheel installed on the top of the riser; The winding wheel is arranged at the lower part of the vertical plate, and the winding wheel and the L-shaped frame are respectively located on both sides of the vertical plate; A winding motor, used to drive the winding wheel to rotate; One end of the drag cable is fixed with the winding wheel, and the other end is fixed with the second part of the L-shaped frame after walking around the guide wheel. 2. The fusion splicing equipment for optical fiber manufacturing as claimed in claim 1, wherein the torch lamp holder comprises: The lamp holder body, the part of the upper surface of the lamp holder body adjacent to the arc-shaped notch has two arc-shaped grooves distributed at intervals, and the one adjacent to the arc-shaped notch is the first arc-shaped groove, which is far away from the arc-shaped groove. The notch is a second arc-shaped groove, the axes of the side walls of the two arc-shaped grooves coincide, and the inner wall of the first arc-shaped groove is provided with a rack; The torch frame is fixedly equipped with a first motor, the output shaft of the first motor cooperates with the rack through a gear, and the torch is installed on the torch frame; One end of the limit rod is relatively fixed to the torch holder, and the other end extends into the second arc-shaped groove. 3. The fusion splicing equipment for optical fiber manufacturing according to claim 1, wherein the first driving mechanism is an air cylinder, an oil cylinder or a linear motor, and the second driving mechanism is an air cylinder, an oil cylinder or a linear motor. 4. The fusion splicing equipment for optical fiber manufacturing according to claim 1, wherein the first part has a limit step, the vertical plate is fixed with a limit plate, and the limit plate is used for contact with the limit step Cooperate to limit the lowest position of the L-shaped frame. 5. The fusion splicing device for optical fiber manufacturing according to claim 1, wherein the locking mechanism comprises: A plurality of positioning holes are arranged at intervals up and down on the side wall of the first part; The fixing plate is fixed on the vertical plate and is located on one side of the first part, and a through hole is arranged on the fixing plate; The positioning pin is movable through the through hole, and the first end of the positioning pin is used to penetrate into the corresponding positioning hole so that the riser and the first part are relatively fixed; The control cylinder is installed on the riser, the piston rod end of the control cylinder is fixed to the second end of the positioning pin, and the control cylinder is used to control the reciprocating movement of the positioning pin. 6. The fusion splicing equipment for optical fiber manufacturing according to claim 1, wherein the screw mechanism comprises: The vertical screw rod is installed in the first part by rotation; The second track, fixed to the first part; The nut block is overlaid on the screw rod and threaded with the screw rod, the outer wall of the nut block is slidably matched with the first track, and the support and protection seat is fixed on the nut block; The second motor is used to drive the screw to rotate. 7 . The fusion splicing device for optical fiber manufacturing according to claim 6 , wherein the second track is a trapezoidal block, and the nut block has a trapezoidal groove matching the trapezoidal block. 8 . 8. The fusion splicing device for optical fiber manufacturing according to claim 1, characterized in that, the side wall of the arc-shaped notch has a graphite layer.

Images