阅读说明：本技术 一种用于光纤制造的熔接设备 (Fusion splicing equipment for manufacturing optical fibers ) 是由 王醒东 何园园 于 2018-08-08 设计创作，主要内容包括：本申请公开了一种用于光纤制造的熔接设备,包括：基座,包括座体以及固定在座体上的竖板,竖板上具有第一轨道；L形架,包括与第一轨道活动配合的第一部分以及第二部分,第二部分设有卡盘；两个移动座,滑动安装在座体上；第一驱动机构,喷灯灯座,滑动安装在移动座上,喷灯灯座上安装有喷灯；第二驱动机构,支撑保护座,通过丝杆机构安装在第一部分；第三驱动机构,锁定机构。本申请的熔接设备在熔接辅助棒和预制棒时,辅助棒和预制棒不动,火焰在预制棒与辅助棒的交界处周向往复转动,这种加热方式能够熔接辅助棒和平直度不好的预制棒；相对于现有的通过人工观察是否熔接合格而言,通过对辅助棒施加作用力,能够更为可靠的检测熔接强度。(The application discloses fusion splicing apparatus 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 welding is qualified through manual work, the welding strength can be detected more reliably by applying acting force on the auxiliary rod.)

1. A fusion splicing apparatus for use in the manufacture of optical fibers, comprising:

the base comprises a base body arranged horizontally and a vertical plate fixed on the base body, and a first track is arranged on the vertical plate;

the L-shaped frame comprises a first part movably matched with the first rail and a second part arranged at the upper end of the first part and extending outwards, the second part is provided with a chuck for clamping the auxiliary rod, and the axis of the chuck is vertically arranged;

the two moving seats are slidably mounted on the seat body and are respectively positioned on two sides of the L-shaped frame;

the first driving mechanism is used for driving the movable seat to be close to or far away from the L-shaped frame;

the blowtorch lamp holder is slidably arranged on the movable seat, one side of the blowtorch lamp holder, which is close to the L-shaped frame, is provided with an arc-shaped notch, the blowtorch lamp holder is provided with a blowtorch which can rotate around a vertical axis in a reciprocating manner, and when the two blowtorch lamp holders are close to each other, the two arc-shaped notches are mutually matched and used for being sleeved on the outer side wall of the prefabricated rod;

the second driving mechanism is used for driving the blowtorch lamp holder to reciprocate up and down;

the supporting and protecting seat is arranged on the first part through a screw rod mechanism and can move up and down along the first part, and the supporting and protecting seat is provided with a limiting sleeve which is sleeved on the outer side wall of the prefabricated rod and used for limiting the vertical position of the prefabricated rod and a flexible pad which is used for being matched with the bottom of the prefabricated rod;

the third driving mechanism is used for controlling the L-shaped frame to move relative to the first track;

and the locking mechanism is used for locking or unlocking the first part, when the first part is locked, the first part is relatively fixed with the vertical plate, and when the first part is unlocked, the first part can move up and down relative to the vertical plate.

2. The fusion splicing apparatus for fiber optic manufacture of claim 1, wherein said burner base comprises:

the lamp holder comprises a lamp holder body, wherein two arc-shaped grooves are distributed at intervals on the upper surface of the lamp holder body, the part of the upper surface of the lamp holder body, which is adjacent to an arc-shaped notch, is a first arc-shaped groove, the part of the upper surface of the lamp holder body, which is adjacent to the arc-shaped notch, is a second arc-shaped groove, the part of the upper surface of the lamp holder body, which is far away from the arc-shaped notch, is a second arc-shaped groove, the axes of the side walls of the two arc-shaped grooves are overlapped, and the inner side wall of the first arc-shaped groove is provided with a rack;

the torch holder is fixedly provided with a first motor, an output shaft of the first motor is matched with the rack through a gear, and the torch is arranged on the torch holder;

one end of the limiting rod is fixed relative to the spray lamp holder, and the other end of the limiting rod extends into the second arc-shaped groove.

3. The fusion apparatus for fiber optic manufacture of claim 1, wherein the first drive mechanism is an air cylinder, oil cylinder, or linear motor and the second drive mechanism is an air cylinder, oil cylinder, or linear motor.

4. The fusion splicing apparatus for fiber optic manufacture of claim 1, wherein the third drive mechanism comprises:

a guide wheel rotatably mounted at the upper end of the vertical plate;

the winding wheel is arranged at the lower part of the vertical plate, and the winding wheel and the L-shaped frame are respectively positioned at two sides of the vertical plate;

the winding motor is used for driving the winding wheel to rotate;

and one end of the inhaul cable is fixed with the winding wheel, and the other end of the inhaul cable is fixed with the second part of the L-shaped frame after bypassing the guide wheel.

5. The fusion apparatus for optical fiber manufacturing of claim 4, wherein the first portion has a limiting step, the riser holds a limiting plate, and the limiting portion is configured to cooperate with the limiting step to define a lowest position of the L-shaped frame.

6. The fusion splicing apparatus for fiber optic manufacture of claim 1, wherein the locking mechanism comprises:

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

the fixing plate is fixed on the vertical plate and positioned on one side of the first part, and a through hole is formed in the fixing plate;

the positioning pin is movably arranged on the through hole in a penetrating mode, and the first end of the positioning pin is used for penetrating into the corresponding positioning hole to enable the vertical plate and the first part to be relatively fixed;

and the control cylinder is arranged on the vertical plate, the end part of a piston rod of the control cylinder is fixed with the second end of the positioning pin, and the control cylinder is used for controlling the positioning pin to move in a reciprocating manner.

7. The fusion splicing apparatus for optical fiber manufacturing of claim 1, wherein the screw mechanism comprises:

the vertically arranged screw rod is rotatably arranged on the first part;

a second rail fixed to the first portion;

the nut block is sleeved on the screw rod in a sleeved mode and is in threaded fit with the screw rod, the outer side wall of the nut block is in sliding fit with the first rail, and the supporting and protecting seat is fixed on the nut block;

and the second motor is used for driving the screw rod to rotate.

8. The fusion apparatus for optical fiber manufacturing of claim 7, wherein the second rail is a trapezoidal block, and the nut block has a trapezoidal groove to be engaged with the trapezoidal block.

9. The fusion splicing apparatus for use in the manufacture of optical fibers according to claim 1, wherein the circular arc shaped recess side walls have graphite layers.

Technical Field

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

Background

During the optical fiber manufacturing, need carry out the flame grinding operation to the prefabricated stick before the wire drawing process, before carrying out the flame grinding to the prefabricated stick, an auxiliary rod of butt fusion respectively at the both ends of prefabricated stick, then two chucks are the auxiliary rod that the centre gripping corresponds respectively, when two chucks rotated with the same speed, drive prefabricated stick and auxiliary rod and rotate, carry out the high temperature ignition to the prefabricated stick through mobilizable blowtorch, the blowtorch uses hydrogen as fuel, can produce the high temperature of 2300 ℃ of controlling, can clear away the impurity and the dust on prefabricated stick surface, make the tiny crack healing on prefabricated stick surface, increase the intensity of optic fibre after the wire drawing, the flame grinding process passes through the high temperature annealing process, reduce or eliminate originally the inhomogeneous internal stress that distributes in the prefabricated stick.

The prior art operation has the following disadvantages:

1. the not good prefabricated stick of straightness when with the butt fusion, the tip of prefabricated stick can rock, and this can seriously influence the butt fusion operation.

2. After the butt fusion was accomplished, whether the butt fusion is qualified mainly depends on the visual observation, and this kind of judgement form is the error that appears easily, if judge the error, the unqualified perform of butt fusion is carrying or carrying out the wire drawing in-process, and the butt fusion department can break off, causes great loss.

Disclosure of Invention

The present invention addresses the above-mentioned problems and overcomes at least one of the deficiencies and provides a method of manufacturing an optical fiber.

The technical scheme adopted by the invention is as follows:

a method of manufacturing an optical fiber comprising the steps of:

1) clamping an auxiliary rod to enable the auxiliary rod to be in a vertical state, vertically placing a prefabricated rod, and aligning the upper end of the prefabricated rod with the lower end of the auxiliary rod;

2) controlling the flame to circumferentially and reciprocally rotate at the junction of the prefabricated rod and the auxiliary rod, and controlling the prefabricated rod to ascend so that the prefabricated rod and the auxiliary rod are mutually extruded and welded into a whole;

3) cooling the welded auxiliary rod and the welded prefabricated rod;

4) applying acting force on the auxiliary rod, enabling the auxiliary rod and the prefabricated rod to move for a set distance or a set time at a set acceleration a, observing whether the welding position cracks or breaks after the movement is finished, carrying out the next process if the welding position does not crack or break, judging that the welding fails if the welding position cracks or breaks, and moving the prefabricated rod and the auxiliary rod to a repair area;

5) carrying out high-temperature annealing treatment on the preform;

6) and (4) placing the preform subjected to high-temperature annealing treatment into a wire drawing furnace for wire drawing operation.

According to the method, when the auxiliary rod and the prefabricated rod are welded, the auxiliary rod and the prefabricated rod are not moved, and the flame circumferentially reciprocates at the junction of the prefabricated rod and the auxiliary rod, so that the auxiliary rod and the prefabricated rod with poor flatness can be welded in a heating mode; compared with the existing method that whether welding is qualified or not is observed manually, the method can detect the welding strength more reliably by applying acting force to the auxiliary rod and enabling the auxiliary rod and the preform rod to move for a set distance or a set time at a set acceleration a.

"if fracture or fracture, judge that the fusion is failed, move prefabricated stick and auxiliary rod to the district of reprocessing", mean to remove prefabricated stick and auxiliary rod to other positions, the workman can reprocess the prefabricated stick and the auxiliary rod that the fusion failed, and the fusion can be carried out again in the later stage.

In actual use, the range of acceleration a: 1.5 to 2.

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

In actual use, the set time may be 1s to 3 s.

In one embodiment of the present invention, the steps 1) to 4) are performed by a welding apparatus, where the welding apparatus includes:

the base comprises a base body arranged horizontally and a vertical plate fixed on the base body, and a first track is arranged on the vertical plate;

the L-shaped frame comprises a first part movably matched with the first rail and a second part arranged at the upper end of the first part and extending outwards, the second part is provided with a chuck for clamping the auxiliary rod, and the axis of the chuck is vertically arranged;

the two moving seats are slidably mounted on the seat body and are respectively positioned on two sides of the L-shaped frame;

the first driving mechanism is used for driving the movable seat to be close to or far away from the L-shaped frame;

the blowtorch lamp holder is slidably arranged on the movable seat, one side of the blowtorch lamp holder, which is close to the L-shaped frame, is provided with an arc-shaped notch, the blowtorch lamp holder is provided with a blowtorch which can rotate around a vertical axis in a reciprocating manner, and when the two blowtorch lamp holders are close to each other, the two arc-shaped notches are mutually matched and used for being sleeved on the outer side wall of the prefabricated rod;

the second driving mechanism is used for driving the blowtorch lamp holder to reciprocate up and down;

the supporting and protecting seat is arranged on the first part through a screw rod mechanism and can move up and down along the first part, and the supporting and protecting seat is provided with a limiting sleeve which is sleeved on the outer side wall of the prefabricated rod and used for limiting the vertical position of the prefabricated rod and a flexible pad which is used for being matched with the bottom of the prefabricated rod;

the third driving mechanism is used for controlling the L-shaped frame to move relative to the first track;

and the locking mechanism is used for locking or unlocking the first part, when the first part is locked, the first part is relatively fixed with the vertical plate, and when the first part is unlocked, the first part can move up and down relative to the vertical plate.

The working principle and the process of the welding equipment are as follows: the auxiliary rod is vertically clamped by the chuck, the prefabricated rod is limited and supported by the supporting and protecting seat, so that the prefabricated rod is vertically arranged, the support protection seat and the prefabricated rod can be driven to move upwards through the screw rod mechanism, so that the upper end of the prefabricated rod is aligned with the lower end of the auxiliary rod, then the two blowtorch lamp holders are mutually close through a first driving mechanism, the two circular arc notches are mutually matched and used for being sleeved on the outer side wall of the prefabricated rod, the position of the lamp holder of the blast burner is adjusted through the second driving mechanism, so that the blast burner is positioned at the junction of the prefabricated rod and the auxiliary rod, the blast burner is ignited, through the reciprocating rotation of blowtorch, can make it be molten state to the juncture heating of prefabricated stick and supplementary stick, drive through screw mechanism this moment and support protection seat and prefabricated stick and slowly move up, finally make prefabricated stick and supplementary stick extrude each other the butt fusion and become integrative, after the butt fusion is accomplished, carry out natural cooling. After cooling, testing the welding strength, and the specific process is as follows: drive through screw mechanism and support the protection seat and move down, the flexible pad that supports the protection seat this moment no longer with prefabricated excellent contact, the locking mechanical system unblock, third actuating mechanism work drives L shape frame first track rebound (with the acceleration a motion of setting for distance or motion set time), after the removal, detect whether fracture or fracture of fusion splice, if do not have fracture or fracture to carry out process on next step, if fracture or fracture, judge that the fusion is failed, move prefabricated excellent and supplementary stick to the district of reprocessing.

Although the supporting and protecting base no longer supports the weight of the preform, the supporting and protecting base moves synchronously when the L-shaped frame moves. Set up like this for even if butt fusion intensity is not enough, the butt fusion department fracture when doing the accelerated movement, prefabricated stick can not drop the damage yet, and prefabricated stick can fall into and support the protection seat, prefabricated stick's bottom and the contact of flexible pad.

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

In practice, in order to adapt the preform, it is preferable that the upper portion of the flexible mat has a concave tapered structure.

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

the lamp holder comprises a lamp holder body, wherein two arc-shaped grooves are distributed at intervals on the upper surface of the lamp holder body, the part of the upper surface of the lamp holder body, which is adjacent to an arc-shaped notch, is a first arc-shaped groove, the part of the upper surface of the lamp holder body, which is adjacent to the arc-shaped notch, is a second arc-shaped groove, the part of the upper surface of the lamp holder body, which is far away from the arc-shaped notch, is a second arc-shaped groove, the axes of the side walls of the two arc-shaped grooves are overlapped, and the inner side wall of the first arc-shaped groove is provided with a rack;

the torch holder is fixedly provided with a first motor, an output shaft of the first motor is matched with the rack through a gear, and the torch is arranged on the torch holder;

one end of the limiting rod is fixed relative to the spray lamp holder, and the other end of the limiting rod extends into the second arc-shaped groove.

Four arc-shaped side walls of the arc-shaped groove of each lamp holder body are provided, and the axes of the four arc-shaped side walls are overlapped; the axis of the side wall means that each point on the side wall is equidistant from a line, and the line is the axis of the side wall. This kind of structural style of blowtorch lamp stand makes the blowtorch frame can be reciprocating motion along first arc recess to drive the blowtorch along prefabricated excellent circumference reciprocating motion, two blowtorch lamp stands mutually support, can realize prefabricated excellent ascending high temperature butt fusion operation in week.

During the actual use, after the butt fusion is ended and test strength is qualified, through second actuating mechanism's drive, the blowtorch can remove along the prefabricated excellent axis, can rotate around the prefabricated excellent axis simultaneously, and the butt fusion equipment of this application can carry out high temperature annealing to the prefabricated excellent promptly.

In an 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:

a guide wheel rotatably mounted at the upper end of the vertical plate;

the winding wheel is arranged at the lower part of the vertical plate, and the winding wheel and the L-shaped frame are respectively positioned at two sides of the vertical plate;

the winding motor is used for driving the winding wheel to rotate;

and one end of the inhaul cable is fixed with the winding wheel, and the other end of the inhaul cable is fixed with the second part of the L-shaped frame after bypassing the guide wheel.

Through the drive of rolling motor, can be with the cable rolling at the rolling wheel, L shape frame can be pulled this moment, is accelerated motion.

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

The L-shaped frame can be conveniently positioned by arranging the limiting steps and the limiting plates.

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

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

the fixing plate is fixed on the vertical plate and positioned on one side of the first part, and a through hole is formed in the fixing plate;

the positioning pin is movably arranged on the through hole in a penetrating mode, and the first end of the positioning pin is used for penetrating into the corresponding positioning hole to enable the vertical plate and the first part to be relatively fixed;

and the control cylinder is arranged on the vertical plate, the end part of a piston rod of the control cylinder is fixed with the second end of the positioning pin, and the control cylinder is used for controlling the positioning pin to move in a reciprocating manner.

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

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

the vertically arranged screw rod is rotatably arranged on the first part;

a second rail fixed to the first portion;

the nut block is sleeved on the screw rod in a sleeved mode and is in threaded fit with the screw rod, the outer side wall of the nut block is in sliding fit with the first rail, and the supporting and protecting seat is fixed on the nut block;

and the second motor is used for driving the screw rod to rotate.

Through the drive of second motor, the lead screw rotates, can drive the nut piece and support the protection seat and reciprocate.

In one embodiment of the present invention, the second rail is a trapezoidal block, and the nut block has a trapezoidal groove matched with the trapezoidal block.

In one embodiment of the present invention, the arc-shaped recess sidewall has a graphite layer. The graphite layer is arranged so as not to contaminate the surface of the preform.

The invention has the beneficial effects that: according to the method, when the auxiliary rod and the prefabricated rod are welded, the auxiliary rod and the prefabricated rod are not moved, and the flame circumferentially reciprocates at the junction of the prefabricated rod and the auxiliary rod, so that the auxiliary rod and the prefabricated rod with poor flatness can be welded in a heating mode; compared with the existing method that whether welding is qualified or not is observed manually, the method can detect the welding strength more reliably by applying acting force to the auxiliary rod and enabling the auxiliary rod and the preform rod to move for a set distance or a set time at a set acceleration a.

Description of the drawings:

FIG. 1 is a flow chart of a method of manufacturing an optical fiber of the present invention;

FIG. 2 is a schematic view of the fusion apparatus;

FIG. 3 is a schematic view of another angle of the fusion apparatus;

fig. 4 is an enlarged view at a in fig. 2.

The figures are numbered:

1. a base; 2. a base body; 3. a vertical plate; 4. an L-shaped frame; 5. a first portion; 6. a second portion; 7. a chuck; 8. an auxiliary rod; 9. performing a rod; 10. a movable seat; 11. a first drive mechanism; 12. a blowtorch lamp holder; 13. a circular arc-shaped notch; 14. a second drive mechanism; 15. a blowtorch; 16. a support protection seat; 17. a limiting sleeve; 18. a flexible pad; 19. a lamp socket body; 20. a first arc-shaped groove; 21. a second arc-shaped groove; 22. a blowtorch holder; 23. a limiting rod; 24. a guide wheel; 25. a winding wheel; 26. a winding motor; 27. a cable; 28. a limiting step; 29. a limiting plate; 30. positioning holes; 31. a fixing plate; 32. positioning pins; 33. controlling the cylinder; 34. a screw rod; 35. a second track; 36. a nut block; 37. a second motor.

The specific implementation mode is as follows:

the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, a method of manufacturing an optical fiber includes the steps of:

1) clamping an auxiliary rod to enable the auxiliary rod to be in a vertical state, vertically placing a prefabricated rod, and aligning the upper end of the prefabricated rod with the lower end of the auxiliary rod;

2) controlling the flame to circumferentially and reciprocally rotate at the junction of the prefabricated rod and the auxiliary rod, and controlling the prefabricated rod to ascend so that the prefabricated rod and the auxiliary rod are mutually extruded and welded into a whole;

3) cooling the welded auxiliary rod and the welded prefabricated rod;

4) applying acting force on the auxiliary rod, enabling the auxiliary rod and the prefabricated rod to move for a set distance or a set time at a set acceleration a, observing whether the welding position cracks or breaks after the movement is finished, carrying out the next process if the welding position does not crack or break, judging that the welding fails if the welding position cracks or breaks, and moving the prefabricated rod and the auxiliary rod to a repair area;

5) carrying out high-temperature annealing treatment on the preform;

6) and (4) placing the preform subjected to high-temperature annealing treatment into a wire drawing furnace for wire drawing operation.

According to the method, when the auxiliary rod and the prefabricated rod are welded, the auxiliary rod and the prefabricated rod are not moved, and the flame circumferentially reciprocates at the junction of the prefabricated rod and the auxiliary rod, so that the auxiliary rod and the prefabricated rod with poor flatness can be welded in a heating mode; compared with the existing method that whether welding is qualified or not is observed manually, the method can detect the welding strength more reliably by applying acting force to the auxiliary rod and enabling the auxiliary rod and the preform rod to move for a set distance or a set time at a set acceleration a.

"if fracture or fracture, judge that the fusion is failed, move prefabricated stick and auxiliary rod to the district of reprocessing", mean to remove prefabricated stick and auxiliary rod to other positions, the workman can reprocess the prefabricated stick and the auxiliary rod that the fusion failed, and the fusion can be carried out again in the later stage.

In actual use, the range of acceleration a: 1.5 to 2.

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

In actual use, the set time may be 1s to 3 s.

As shown in fig. 2, 3 and 4, in the present embodiment, steps 1) to 4) are operated by a fusion apparatus including:

the base 1 comprises a base body 2 arranged horizontally and a vertical plate 3 fixed on the base body 2, wherein the vertical plate 3 is provided with a first track (not shown in the figure);

the L-shaped frame 4 comprises a first part 5 movably matched with the first rail and a second part 6 arranged at the upper end of the first part 5 and extending outwards, the second part 6 is provided with a chuck 7 used for clamping an auxiliary rod 8, and the axis of the chuck 7 is vertically arranged;

the two moving seats 10 are slidably mounted on the seat body 2, and the two moving seats 10 are respectively positioned on two sides of the L-shaped frame 4;

a first driving mechanism 11 for driving the movable base 10 to approach or separate from the L-shaped frame 4;

the torch lamp holder 12 is slidably mounted on the movable base 10, one side, close to the L-shaped frame 4, of the torch lamp holder 12 is provided with an arc-shaped notch 13, the torch lamp holder 12 is provided with a torch 15 capable of rotating around a vertical axis in a reciprocating mode, and when the two torch lamp holders 12 are close to each other, the two arc-shaped notches 13 are matched with each other and used for being sleeved on the outer side wall of the prefabricated rod 9;

a second driving mechanism 14 for driving the torch holder 12 to reciprocate up and down;

the supporting and protecting seat 16 is arranged on the first part 5 through a screw rod 34 mechanism, the supporting and protecting seat 16 can move up and down along the first part 5, the supporting and protecting seat 16 is provided with a limiting sleeve 17 which is sleeved on the outer side wall of the prefabricated rod 9 and used for limiting the vertical position of the prefabricated rod 9, and a flexible pad 18 which is used for being matched with the bottom of the prefabricated rod 9;

the third driving mechanism is used for controlling the L-shaped frame 4 to move relative to the first track;

and a locking mechanism for locking or unlocking the first part 5, wherein when the first part 5 is locked, the first part 5 is fixed relative to the vertical plate 3, and when the first part 5 is unlocked, the first part 5 can move up and down relative to the vertical plate 3.

The working principle and the process of the welding equipment are as follows: the auxiliary rod 8 is vertically clamped through the chuck 7, the prefabricated rod 9 is limited and supported through the supporting and protecting seat 16, the prefabricated rod 9 is vertically arranged, the supporting and protecting seat 16 and the prefabricated rod 9 can be driven to move upwards through the screw rod 34 mechanism, the upper end of the prefabricated rod 9 is aligned with the lower end of the auxiliary rod 8, then the two blowtorch lamp holders 12 are close to each other through the first driving mechanism 11, the two arc-shaped notches 13 are matched with each other and are used for being sleeved on the outer side wall of the prefabricated rod 9, the position of the blowtorch lamp holder 12 is adjusted through the second driving mechanism 14, the blowtorch 15 is positioned at the junction of the prefabricated rod 9 and the auxiliary rod 8, the blowtorch 15 is ignited, the junction of the prefabricated rod 9 and the auxiliary rod 8 can be heated through the reciprocating rotation of the blowtorch 15, the junction of the prefabricated rod 9 and the auxiliary rod 8 is enabled to be in a melting state, at the moment, the supporting and protecting seat 16 and the prefabricated rod 9 are driven to slowly move upwards through the screw rod 34 mechanism, and the prefabricated rod 9 and the auxiliary rod 8 are finally extruded and welded into a whole, and after the welding is finished, naturally cooling. After cooling, testing the welding strength, and the specific process is as follows: drive through lead screw 34 mechanism and support protection seat 16 and move down, the flexible pad 18 that supports protection seat 16 this moment no longer contacts with prefabricated stick 9, locking mechanical system unblock, third actuating mechanism works, drive L shape frame 4 relative first track rebound (with the acceleration a motion of settlement set for distance or motion set for time), after the removal, detect whether the splice splits or breaks, if do not split or break carry out process on next step, if split or break, judge that the splice is failed, move prefabricated stick 9 and supplementary stick 8 to the region of reprocessing.

The support and protection seat 16 does not support the weight of the preform 9 any more, but the support and protection seat 16 moves synchronously when the L-shaped frame 4 moves. This arrangement makes even if the fusion bonding strength is not enough, the fusion bonding fracture when doing the accelerated movement, and prefabricated excellent 9 can not drop the damage, and prefabricated excellent 9 can fall into and support protection seat 16, and the bottom of prefabricated excellent 9 and flexible pad 18 contact.

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

In practice, in order to fit the bottom of the preform 9, it is preferred that the upper portion of the flexible pad 18 has a concave conical structure.

As shown in fig. 2 and 4, in the present embodiment, the torch holder 12 includes:

the lamp holder comprises a lamp holder body 19, wherein two arc-shaped grooves are distributed at intervals on the upper surface of the lamp holder body 19, the part of the upper surface of the lamp holder body 19, which is adjacent to the arc-shaped notch 13, is provided with a first arc-shaped groove 20, the part of the upper surface of the lamp holder body is provided with a second arc-shaped groove 21, which is far away from the arc-shaped notch 13, the axes of the side walls of the two arc-shaped grooves are coincided, and the inner side wall of the first arc-shaped groove 20 is provided with a rack (not shown in the figure);

a torch holder 22 to which a first motor (not shown) is fixedly mounted, an output shaft of the first motor is engaged with a rack through a gear, and the torch 15 is mounted on the torch holder 22;

one end of the limiting rod 23 is fixed relative to the burner cap 22, and the other end extends into the second arc-shaped groove 21.

Four arc-shaped side walls of the arc-shaped groove of each lamp holder body 19 are provided, and the axes of the four arc-shaped side walls are overlapped; the axis of the side wall means that each point on the side wall is equidistant from a line, and the line is the axis of the side wall. This kind of structural style of blowtorch lamp holder 12 makes blowtorch frame 22 can be reciprocating along first arc recess 20 to drive blowtorch 15 along prefabricated excellent 9 circumference reciprocating motion, two blowtorch lamp holders 12 mutually support, can realize the ascending high temperature butt fusion operation of prefabricated excellent 9 circumference.

During the actual application, after the butt fusion is ended and test strength is qualified, through the drive of second actuating mechanism 14, blowtorch 15 can remove along prefabricated excellent 9 axis, can rotate around prefabricated excellent 9 axis simultaneously, and the butt fusion equipment of this application can carry out high temperature annealing to prefabricated excellent 9 promptly.

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 fig. 2 and 3, in the present embodiment, the third driving mechanism includes:

a guide wheel 24 rotatably mounted on the upper end of the vertical plate 3;

a winding wheel 25 arranged at the lower part of the vertical plate 3, wherein the winding wheel 25 and the L-shaped frame 4 are respectively positioned at two sides of the vertical plate 3;

the winding motor 26 is used for driving the winding wheel 25 to rotate;

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

Through the drive of rolling motor 26, can be with the cable 27 rolling at rolling wheel 25, L shape frame 4 can be pulled this moment, does accelerated motion.

In this embodiment, as shown in fig. 2, the first portion 5 has a limiting step 28, the riser 3 is fixed with a limiting plate 29, and the limiting portion is used to cooperate with the limiting step 28 to limit the lowest position of the L-shaped frame 4. The positioning of the L-shaped frame 4 can be facilitated by the provision of the position-limiting step 28 and the position-limiting plate 29.

As shown in fig. 2, in the present embodiment, the locking mechanism includes:

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

a fixing plate 31 fixed to the vertical plate 3 and located on one side of the first portion 5, the fixing plate 31 having a through hole (not shown);

the positioning pin 32 is movably arranged on the through hole in a penetrating way, and the first end of the positioning pin 32 is used for penetrating into the corresponding positioning hole 30 so as to relatively fix the vertical plate 3 and the first part 5;

and the control cylinder 33 is installed on the vertical plate 3, the end part of a piston rod of the control cylinder 33 is fixed with the second end of the positioning pin 32, and the control cylinder 33 is used for controlling the positioning pin 32 to reciprocate.

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

As shown in fig. 2, in the present embodiment, the screw rod 34 mechanism includes:

a vertically arranged screw rod 34 rotatably mounted on the first part 5;

a second rail 35 fixed to the first portion 5;

the nut block 36 is sleeved on the screw rod 34 and is in threaded fit with the screw rod 34, the outer side wall of the nut block 36 is in sliding fit with the first rail, and the supporting and protecting seat 16 is fixed on the nut block 36;

and the second motor 37 is used for driving the screw rod 34 to rotate.

The screw rod 34 is driven by the second motor 37 to rotate, so that the nut block 36 and the support protection seat 16 can be driven to move up and down.

In this embodiment, the second rail 35 is a trapezoidal block, and the nut block 36 has a trapezoidal groove engaged with the trapezoidal block.

In practice, the side walls of the circular arc-shaped recesses 13 are provided with graphite layers (not shown). The provision of the graphite layer does not contaminate the surface of the preform 9.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields and are included in the scope of the present invention.