CN114871655A

CN114871655A - Pipe fitting welding equipment with quick locate function

Info

Publication number: CN114871655A
Application number: CN202210788891.6A
Authority: CN
Inventors: 何永利; 刘明智; 唐仕文
Original assignee: Jinan Baichuan Industrial Automation Equipment Co ltd
Current assignee: Jinan Baichuan Industrial Automation Equipment Co ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2022-08-09
Anticipated expiration: 2042-07-06
Also published as: CN114871655B

Abstract

The invention is as follows: a pipe welding device with a quick positioning function belongs to the field of pipe welding devices. The problem of when welding the pipe and the ring flange of slope port, the center of manual work location pipe and ring flange is more difficult, has seriously reduced work efficiency, if the centre of a circle of pipe and ring flange do not align, can lead to the welding seam of whole pipe fitting uneven is solved. The utility model discloses a pipe fitting welding equipment with quick locate function, including the workstation, the right part of side is equipped with flange fixed establishment on the workstation, and flange fixed establishment's middle part is equipped with positioning mechanism. The flange fixing mechanism is arranged, so that the use range of the device is enlarged, and the practicability of the device is improved; through setting up positioning mechanism, fix a position the centre of a circle of pipe and ring flange fast, avoid extravagant longer time when the welding, improve the work efficiency of pipe fitting processing, the pipe is not aligned with the ring flange centre of a circle when avoiding welding, improves the welding effect of pipe and ring flange.

Description

Pipe fitting welding equipment with quick locate function

Technical Field

The invention relates to the field of pipe welding equipment, in particular to pipe welding equipment with a rapid positioning function.

Background

The pipe fitting welding is to weld the pipe and the connected fittings by using a welding method, when the flange plate is welded, the central through hole of the flange plate needs to be aligned with the pipe, so that the central lines of the pipe and the flange plate are positioned on the same axial line, and the distance of a welding seam between the flange plate and the pipe is controlled, so that the welding spots of the pipe and the flange plate are uniform.

However, the existing pipe welding only performs automatic welding on a pipe with a horizontal cut, however, when the pipe with an inclined port and a flange plate are welded, two persons are required to cooperate to align the circle center of the flange plate with the circle center of the inclined port of the pipe, the distance between the flange plate and the pipe is controlled, then a welding gun is used for fixing the pipe by spot welding at the welding seam, so that the welding seam between the flange plate and the pipe is kept fixed, and then other parts are welded.

Disclosure of Invention

In order to solve the problems mentioned in the background, the invention provides a pipe welding device capable of automatically welding pipes with a quick positioning function.

In order to achieve the purpose, the invention is realized by the following technical scheme: a pipe fitting welding device with a rapid positioning function comprises a workbench, wherein a flange fixing mechanism is arranged at the right part of the upper side surface of the workbench and used for fixing a flange plate, the flange fixing mechanism is adjusted according to the inclination angle of a circular pipe notch, a positioning mechanism is arranged at the middle part of the flange fixing mechanism and used for aligning the flange plate and the circular pipe inclined notch, a pipe fitting fixing mechanism is arranged at the left part of the upper side surface of the workbench and used for adjusting the fixing height of the pipe fitting and fixing the flange plate to the flange fixing mechanism, the positioning mechanism is started to position the flange plate, then an operator adjusts the pipe fitting fixing mechanism according to the positioning mechanism to enable the inclined notch of the pipe fitting and the center of the flange circle to be positioned on the same axis line, an automatic welding mechanism is arranged at the rear part of the upper side surface of the workbench and used for welding according to the inclination angle of the flange, the inclined notch of the circular tube is welded with the flange.

Furthermore, the flange fixing mechanism comprises a fixing shell, the fixing shell is arranged at the right part of the upper side surface of the workbench, the left side surface of the fixing shell is fixedly connected with a first supporting plate, the middle part of the first supporting plate is provided with a circular through hole, the circular through hole of the first supporting plate is rotationally connected with a rotating ring, the outer annular surface of the rotating ring is fixedly connected with a circular toothed ring, the middle part of the upper side surface of the first supporting plate is fixedly connected with a first servo motor through a mounting seat, an output shaft of the first servo motor is fixedly connected with a first gear, the first gear is meshed with the circular toothed ring, a plurality of fixing seats are fixedly connected with the inner annular surface of the rotating ring at equal intervals in the circumferential direction, a plurality of rotating shafts are rotationally connected with the fixing seats, a plurality of extruding blocks are fixedly connected with the rotating shafts, two rings of the plurality of rotating shafts are sleeved with torsional springs, two ends of the torsional springs are fixedly connected with the adjacent fixing seats and the extruding blocks respectively, and the right ends of the extruding blocks are fixedly connected with first connecting rods, the right-hand member of a plurality of head rod all rotates and is connected with the ball that is used for reducing frictional force, the spout has all been seted up in two portions around the set casing medial surface, there is the conical shell through connecting block sliding connection in the spout of set casing, the lateral surface of conical shell and the ball contact cooperation of a plurality of head rod right-hand member, the rear portion of set casing medial surface has an electronic hydraulic rod through the mount pad rigid coupling, the connecting block rigid coupling at rear portion on the telescopic link of an electronic hydraulic rod and the conical shell, the lower part of set casing is equipped with the angle adjusting part, the angle adjusting part is used for changing the swing angle of ring flange.

Furthermore, the left part of the inner side surface of each extrusion block is provided with an anti-slip sheet for increasing the friction force between the extrusion block and the flange.

Further, angle adjusting part is including the arc, the right part of arc rigid coupling side on the workstation, the spout has been seted up to the last side of arc, sliding connection has the arc slide in the spout of arc, the epitheca rigid coupling is in the last side of arc slide, the centre of a circle of arc and arc slide and the center of a plurality of extrusion piece are on same vertical line, the interior anchor ring rigid coupling of arc slide has the arc ring gear, the right part of workstation has inlayed second servo motor, second servo motor has self-locking function, the rigid coupling has the second gear on second servo motor's the output shaft, second gear and arc ring gear meshing.

Furthermore, the pipe fixing mechanism comprises a first connecting plate, the first connecting plate is detachably arranged at the left part of the upper side surface of the workbench, the left part and the right part of the upper side surface of the first connecting plate are fixedly connected with rectangular shells, the front part and the rear part in the two rectangular shells are respectively connected with sliding plates in a sliding way, the upper parts of the two front sliding plates are hinged with a second supporting plate, the middle parts of the two second supporting plates are provided with square through holes, the upper parts of the two rear sliding plates are hinged with third supporting plates, the two third supporting plates respectively penetrate through the square through holes of the adjacent second supporting plates, the front adjacent second supporting plates and the rear adjacent third supporting plates are hinged, the upper ends of the two second supporting plates and the two third supporting plates are respectively connected with a rotating roller in a rotating way, the rotating roller is made of hard metal, the left rectangular shell is connected with a first threaded rod in a rotating way, the first threaded rod penetrates through the two left sliding plates and is connected with the left sliding plates in a threaded way, the screw thread directions of the front part and the rear part of the first threaded rod are opposite, the front end of the first threaded rod penetrates through the left rectangular shell and is connected with the left rectangular shell in a rotating way, the front end of the first threaded rod is fixedly connected with a rotating wheel, a slide rod is fixedly connected in the right rectangular shell, the slide rod in the right rectangular shell penetrates through the two slide plates on the right side and is connected with the two slide plates in a sliding way, second connecting rods are fixedly connected between the lower parts of the two second support plates and the two third support plates, the rear part of the upper side surface of the first connecting plate is fixedly connected with a vertical plate, the middle part of the vertical plate is provided with a square through hole, the left part and the right part of the square through hole of the vertical plate are fixedly connected with guide rods, a first sliding seat is slidably connected in the square through hole of the vertical plate, the two guide rods penetrate through the first sliding seat and are connected with the sliding way, the front part of the first sliding seat is rotatably connected with an electric wheel, and the rear side surface of the vertical plate is fixedly connected with a second electric hydraulic push rod through a mounting seat, the telescopic rod of the second electric hydraulic push rod is fixedly connected with the first sliding seat.

Further, a rubber ring for increasing the friction force with the circular tube is mounted on the outer ring surface of the electric wheel.

Further, positioning mechanism is including first solid fixed ring, first solid fixed ring passes through the connecting block rigid coupling in a plurality of fixing base, the centre of a circle of first solid fixed ring and the centre of a circle of rotating ring are on same axis, first solid fixed ring's interior anchor ring rotates and is connected with circular shell, four spouts have been seted up to equidistant on the circular shell, the middle part sliding connection of circular shell has the spline rod, the right-hand member of spline rod is installed and is used for spacing disc, the left end rigid coupling of spline rod has the plectane, four spouts have been seted up to the plectane circumference equidistant, the outside face ring cover of spline rod has first spring, the both ends of first spring rigid coupling respectively in circular shell and plectane, be equipped with centering assembly on the circular shell, centering assembly is used for making the centre of a circle of ring flange and the notched centre of a circle of pipe slope on same axis.

Furthermore, the left side surface of the circular plate is rotationally connected with a plurality of steel balls at equal intervals, and the steel balls on the left side surface of the circular plate are used for reducing the friction force with the flange plate.

Furthermore, the centering assembly comprises a second fixing ring fixedly connected to the right part in the circular shell, four first fixing rods fixedly connected between the outer ring surface of the second fixing ring and the inner ring surface of the circular shell, sliding blocks slidably connected to the four first fixing rods, second springs sleeved on the outer side surfaces of the four first fixing rods, two ends of each second spring respectively fixedly connected to the circular shell and the adjacent sliding block, positioning rods fixedly connected to the left side surfaces of the four sliding blocks, the left ends of the four positioning rods are arranged in a spine shape, the four positioning rods are respectively slidably connected to the four sliding grooves of the circular plate, third connecting rods fixedly connected to the right side surfaces of the four sliding blocks, round balls rotatably connected to the right ends of the four third connecting rods, the four third connecting rods respectively penetrate through and slidably connected to the four sliding grooves of the circular shell, and a support seat is fixedly connected to the right part of the upper side surface of the fixing shell, the left side of supporting seat equidistant rigid coupling has four gag lever posts, and the equal rigid coupling in the right flank of circular shell of left end of four gag lever posts has the conical body on four gag lever posts, and the ball sliding contact of conical body and four third connecting rod right-hand members has inlayed electric putter on the upper portion of supporting seat, electric putter's telescopic link and conical body rigid coupling.

Further, the automatic welding mechanism comprises a fixed plate, the fixed plate is fixedly connected to the rear part of the upper side surface of the workbench, a chute is formed in the upper side surface of the fixed plate, a second fixed rod is fixedly connected into the chute of the fixed plate, an L-shaped sliding plate is slidably connected into the chute of the fixed plate, the second fixed rod penetrates through the lower part of the L-shaped sliding plate and is slidably connected with the L-shaped sliding plate, a third spring is sleeved on the outer side surface of the second fixed rod in a ring mode, two ends of the third spring are fixedly connected to the fixed plate and the L-shaped sliding plate respectively, a square chute is formed in the upper side surface of the L-shaped sliding plate, a second threaded rod is rotatably connected into the square chute of the L-shaped sliding plate, the rear end of the second threaded rod penetrates through the L-shaped sliding plate and is rotatably connected with the L-shaped sliding plate, a rotating wheel is fixedly connected with the rear end of the second threaded rod, a second sliding seat is slidably connected with the second threaded rod through a threaded rod, and a second connecting plate is hinged to the second sliding seat, the front part of the second connecting plate is fixedly connected with a supporting rod, the supporting rod is in sliding contact with the left side surface of the flange plate, and the front part of the upper side surface of the second connecting plate is detachably provided with a laying welding gun.

Compared with the prior art, the invention has the following advantages: according to the invention, the flange fixing mechanism is arranged, the conical shell extrudes the four first connecting rods, the four extrusion blocks are enabled to swing inwards to extrude the outer annular surface of the flange plate, and the flange plate is enabled to adapt to different inclination angles of the ends to be welded of the circular tube by adjusting the grabbing angle of the arc-shaped sliding plate, so that the application range of the device is enlarged, and the practicability of the device is improved; by arranging the pipe fitting fixing mechanism, the two second supporting plates and the two third supporting plates drive the circular pipe to move up and down, the height of the circular pipe is adjusted, the circle centers of the flange and the end to be welded of the circular pipe are on the same axis, the first threaded rod is utilized to drive the two sliding plates on the left side to move away from or approach to slide, the height of the circular pipe is adjusted, the problem that the operation is complex when the circular pipe and the flange are welded to be aligned is avoided, and the production efficiency is effectively improved; by arranging the positioning mechanism, the outer side surface of the conical body is extruded to the right ends of the four third connecting rods, the four third connecting rods respectively drive the sliding block fixedly connected to the conical body and the positioning rods to move away from each other along the first fixing rod, the four positioning rods are extruded to the central hole of the flange plate, the four positioning rods and the inner side surface of the to-be-welded end of the circular tube are used for contact positioning, the circle centers of the circular tube and the flange plate are quickly positioned, the phenomenon that the circle centers of the circular tube and the flange plate are not aligned when a shell is welded is avoided, welding seams are deviated when welding is caused, and the welding effect of the circular tube and the flange plate is improved; through setting up automatic weld mechanism, utilize the contact position of second threaded rod regulation bracing piece and ring flange, circumference round hole contact on avoiding bracing piece and the ring flange, cause the welder that wires to produce a deviation and keep away from the welding seam between ring flange and the pipe, the welded effect of ring flange and pipe has been improved, utilize the bracing piece extrusion on the ring flange, through the position that changes L shape slide, make the welder that wires evenly welds the welding seam between pipe and the ring flange always, it is inhomogeneous to avoid welding seam welding when the welding.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective view of the flange fixing mechanism of the present invention.

Fig. 3 is a partially cut-away perspective view of the flange fixing mechanism of the present invention.

Fig. 4 is a partially enlarged perspective view of the flange fixing mechanism of the present invention.

Fig. 5 is a schematic perspective view of the present invention.

Fig. 6 is a schematic perspective view of a part of the flange fixing mechanism of the present invention.

Fig. 7 is a schematic perspective view of the pipe fixing mechanism of the present invention.

Fig. 8 is a schematic side-view perspective structure view of the pipe fixing mechanism of the present invention.

Fig. 9 is a schematic perspective view of a part of the positioning mechanism of the present invention.

Fig. 10 is a partially cut-away perspective view of a first positioning mechanism of the present invention.

Fig. 11 is a partially cut-away perspective view of a second positioning mechanism according to the present invention.

Fig. 12 is a schematic perspective view of the automatic welding mechanism of the present invention.

List of reference numerals: 1-workbench, 201-fixed shell, 202-first supporting plate, 203-rotating ring, 204-circular toothed ring, 205-first servo motor, 206-first gear, 207-fixed seat, 208-rotating shaft, 209-extrusion block, 210-torsion spring, 211-first connecting rod, 212-conical shell, 213-first electric hydraulic push rod, 214-arc plate, 215-arc sliding plate, 216-arc gear ring, 217-second servo motor, 218-second gear, 301-first connecting plate, 302-rectangular shell, 303-sliding plate, 304-second supporting plate, 305-third supporting plate, 306-first threaded rod, 307-second connecting rod, 308-vertical plate, 309-guide rod, 310-first sliding seat, 311-an electric wheel, 312-a second electric hydraulic push rod, 401-a first fixing ring, 402-a circular shell, 403-a spline rod, 404-a circular plate, 405-a first spring, 406-a second fixing ring, 407-a first fixing rod, 408-a sliding block, 409-a second spring, 410-a positioning rod, 411-a third connecting rod, 412-a supporting seat, 413-a limiting rod, 414-a conical body, 415-an electric push rod, 501-a fixing plate, 502-a second fixing rod, 503-an L-shaped sliding plate, 504-a third spring, 505-a second threaded rod, 506-a second sliding seat, 507-a second connecting plate, 508-a supporting rod and 509-a spinning welding gun.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.

Example 1

A pipe fitting welding device with a rapid positioning function is disclosed, as shown in figures 1-12, and comprises a workbench 1, wherein a flange fixing mechanism is arranged at the right part of the upper side surface of the workbench 1 and used for fixing a flange plate, the flange fixing mechanism is adjusted according to the inclination angle of a circular pipe notch, the flange fixing mechanism drives the flange plate on the workbench to swing, so that the swing angle of the flange plate is the same as the inclination direction of the circular pipe notch, a positioning mechanism is arranged at the middle part of the flange fixing mechanism and used for aligning the flange plate and the circular pipe notch in an inclined alignment manner, a pipe fitting fixing mechanism is arranged at the left part of the upper side surface of the workbench 1 and used for adjusting the pipe fitting fixing height, the flange plate is fixed on the flange fixing mechanism, the positioning mechanism is started to position the flange plate, an operator adjusts the pipe fitting fixing mechanism according to the positioning mechanism, and the pipe fitting fixing mechanism drives the circular pipe to move up and down, the inclined notch of the circular pipe is contacted with the positioning mechanism, the inclined notch of the pipe fitting and the center of the flange are positioned on the same axis, the rear part of the upper side surface of the workbench 1 is provided with an automatic welding mechanism, and the automatic welding mechanism is used for welding according to the inclined angle of the flange so as to weld the inclined notch of the circular pipe and the flange plate.

When the device is used, an operator starts the flange fixing mechanism, the flange fixing mechanism clamps the flange plate, when the flange plate is installed, the flange plate extrudes the positioning mechanism, the flange plate is vertically installed in the flange fixing mechanism, the increase of a welding seam between the flange plate and the circular pipe caused by the deflection of the flange plate is avoided, the welding efficiency of the flange plate and the circular pipe is reduced, the circular pipe is placed in the pipe fixing mechanism, the operator pushes the circular pipe to move rightwards, then the operator controls the flange fixing mechanism to drive the flange plate on the flange plate to swing, the swing angle of the flange plate is the same as the inclined direction of the notch of the circular pipe, then the operator starts the positioning mechanism, the positioning mechanism is contacted with the central through hole of the flange plate, the operator controls the pipe fixing mechanism to drive the circular pipe to move upwards and downwards, the inclined notch of the circular pipe is contacted with the positioning mechanism, and the inclined notch of the circular pipe and the central through hole of the flange plate are positioned on the same axis line, then the operator resets and closes the positioning mechanism, then the operator adjusts the welding seam between the circular tube and the flange plate, the operator adjusts the automatic welding mechanism to make the upper part of the automatic welding mechanism contact with the flange plate to weld the automatic welding mechanism along the welding seam, then the operator starts the tube fixing mechanism to fix the circular tube on the pipe, then the operator controls the flange fixing mechanism and the tube fixing mechanism to make the rotating speeds of the flange plate and the circular tube the same, meanwhile, the operator starts the automatic welding mechanism to weld the circular tube along the welding seam of the notch of the flange plate and the circular tube after welding, the operator firstly closes the automatic welding mechanism, then the operator makes the flange fixing mechanism and the tube fixing mechanism release the fixing of the flange plate and the circular tube, then the operator takes off the welded tube, because the flange fixing mechanism and the tube fixing mechanism are not completely reset, only need be in flange fixed establishment and pipe fitting fixed establishment go up the re-fixation ring flange and pipe to the welding seam between adjusting flange dish and the pipe, so carry out welding in batches to the pipe fitting of the same model, when needs weld the ring flange and the pipe of different models, this device of operating personnel readjustment makes this device be applicable to the ring flange and the pipe of different models, makes the practicality of this device improve.

Example 2

On the basis of embodiment 1, as shown in fig. 2 to 5, the flange fixing mechanism includes a fixing shell 201, the fixing shell 201 is disposed at the right portion of the upper side surface of the workbench 1, a first supporting plate 202 is welded to the left side surface of the fixing shell 201, a circular through hole is formed in the middle of the first supporting plate 202, a rotating ring 203 is rotatably connected to the circular through hole of the first supporting plate 202, a circular toothed ring 204 is welded to the outer annular surface of the rotating ring 203, a first servo motor 205 is connected to the middle of the upper side surface of the first supporting plate 202 through a mounting seat bolt, a first gear 206 is keyed on an output shaft of the first servo motor 205, the first gear 206 is engaged with the circular toothed ring 204, four fixing seats 207 are welded at equal intervals in the circumferential direction on the inner annular surface of the rotating ring 203, rotating shafts 208 are all rotatably connected to the four fixing seats 207, squeezing blocks 209 are all welded to the four rotating shafts 208, anti-skid sheets are all installed at the left portion of the inner side surface of the four squeezing blocks 209, the anti-slip sheets on the extrusion blocks 209 are used for increasing the friction force between the extrusion blocks 209 and the flange, two parts of four rotating shafts 208 are sleeved with torsion springs 210, two ends of eight torsion springs 210 are fixedly connected to the adjacent fixing seats 207 and the extrusion blocks 209 respectively, the right ends of the four extrusion blocks 209 are welded with first connecting rods 211, the right ends of the four first connecting rods 211 are rotatably connected with round balls for reducing the friction force, the front part and the rear part of the inner side surface of the fixed shell 201 are provided with sliding grooves, the inside of the sliding groove of the fixed shell 201 is connected with conical shells 212 through connecting blocks in a sliding manner, the outer side surfaces of the conical shells 212 are in contact fit with the round balls at the right ends of the four first connecting rods 211, the round balls at the rear ends of the first connecting rods 211 reduce the friction between the rear ends of the four first connecting rods 211 and the conical shells 212, the first connecting rods 211 and the conical shells 212 are prevented from being damaged due to long-term use, the service life of the device is prolonged, the rear part of the inner side surface of the fixed shell 201 is connected with a first electric hydraulic push rod 213 through mounting seat bolts, connecting block bolted connection at rear portion on first electric hydraulic rod 213's the telescopic link and the toper shell 212, first electric hydraulic rod 213's telescopic link is removed to the left side through the connecting block that promotes toper shell 212 rear portion, four head rods 211 of toper shell 212 extrusion, four head rods 211 drive the left side of adjacent extrusion piece 209 and swing along fixing base 207 to the inside, the outer anchor ring of ring flange is extruded simultaneously in the left side of four extrusion pieces 209, fix the ring flange, the lower part of set casing 201 is equipped with the angle adjusting part, the angle adjusting part is used for changing the swing angle of ring flange.

As shown in fig. 5, the angle adjusting assembly includes an arc plate 214, the arc plate 214 is bolted on the right portion of the upper side of the workbench 1, a sliding groove is formed in the upper side of the arc plate 214, an arc sliding plate 215 is slidably connected in the sliding groove of the arc plate 214, a fixing shell 201 is bolted on the upper side of the arc sliding plate 215, the circle centers of the arc plate 214 and the arc sliding plate 215 and the circle centers of a plurality of extrusion blocks 209 are on the same vertical line, the rotation angle of the arc sliding plate 215 is adjusted, so that the flange plate adapts to different inclination angles of welding ends of a circular tube, the use range of the device is enlarged, the practicability of the device is improved, an arc-shaped gear ring 216 is welded on the inner ring surface of the arc sliding plate 215, a second servo motor 217 is embedded in the right portion of the workbench 1, the second servo motor 217 has a self-locking function, a second gear 218 is keyed on the output shaft of the second servo motor 217, and the second gear 218 is meshed with the arc-shaped gear ring 216.

As shown in fig. 6 and 7, the pipe fixing mechanism comprises a first connecting plate 301, the first connecting plate 301 is bolted on the left part of the upper side surface of the workbench 1, the left and right parts of the upper side surface of the first connecting plate 301 are bolted with rectangular shells 302, the front and back parts of the two rectangular shells 302 are slidably connected with sliding plates 303, the upper parts of the two front sliding plates 303 are hinged with second supporting plates 304, the middle parts of the two second supporting plates 304 are provided with square through holes, the upper parts of the two rear sliding plates 303 are hinged with third supporting plates 305, the two third supporting plates 305 respectively pass through the square through holes of the adjacent second supporting plates 304, the front and back adjacent second supporting plates 304 are hinged with the third supporting plates 305, the upper ends of the two second supporting plates 304 and the two third supporting plates 305 are rotatably connected with rotating rollers, the rotating rollers are made of hard metal, the left rectangular shell 302 is rotatably connected with a first threaded rod 306, the first threaded rod 306 penetrates through the two left sliding plates 303 and is in threaded connection with the left sliding plates 303, the thread directions of the front part and the rear part of the first threaded rod 306 are opposite, the front end of the first threaded rod 306 penetrates through the left rectangular shell 302 and is in rotational connection with the left rectangular shell 302, the front end of the first threaded rod 306 is fixedly connected with a rotating wheel, the first threaded rod 306 is used for driving the two left sliding plates 303 to move away from or approach to slide, the height of a round pipe is adjusted, the problem that operation is complex when the round pipe and a flange plate are in welding alignment is avoided, production efficiency is effectively improved, a sliding rod is welded in the right rectangular shell 302, the sliding rod in the right rectangular shell 302 penetrates through the two right sliding plates 303 and is in sliding connection with the right sliding plates, second connecting rods 307 are welded between the lower parts of the two second supporting plates 304 and the two third supporting plates 305, a vertical plate 308 is welded to the rear bolt on the upper side surface of the first connecting plate 301, and a square through hole is formed in the middle part of the vertical plate 308, the equal rigid coupling in two portions has guide bar 309 about the square through hole of vertical board 308, sliding connection has first sliding seat 310 in the square through hole of vertical board 308, two guide bar 309 all pass first sliding seat 310 and rather than sliding connection, the front portion of first sliding seat 310 rotates and is connected with electronic round 311, the outer anchor ring of electronic round 311 installs the rubber ring that is used for the increase and pipe frictional force, the rubber ring of electronic round 311 lateral surface takes place to deform, area of contact between electronic round 311 and the pipe has been increased, the frictional force between electronic round 311 and the pipe has been improved, avoided the pipe to take place to skid at rotation in-process electronic round 311 and pipe, pipe and ring flange welded effect has been improved, the trailing flank of vertical board 308 has electronic hydraulic push rod 312 of second through the mount pad rigid coupling, the telescopic link of electronic hydraulic push rod 312 of second and first sliding seat 310 bolted connection.

As shown in fig. 8-10, the positioning mechanism includes a first fixing ring 401, the first fixing ring 401 is welded to four fixing seats 207 through a connecting block, the center of the first fixing ring 401 and the center of the rotating ring 203 are on the same axis, the inner annular surface of the first fixing ring 401 is rotatably connected to a circular housing 402, four sliding grooves are formed in the circular housing 402 at equal intervals, a spline rod 403 is slidably connected to the middle of the circular housing 402, a circular plate for limiting is welded to the right side of the spline rod 403, a circular plate 404 is welded to the left end of the spline rod 403, four sliding grooves are formed in the circular plate 404 at equal intervals in the circumferential direction, a plurality of steel balls are rotatably connected to the left side of the circular plate 404 at equal intervals, the steel balls on the left side of the circular plate 404 are used for reducing the friction force with the flange plate, a first spring 405 is annularly sleeved on the outer side of the spline rod 403, two ends of the first spring 405 are respectively fixedly connected to the circular housing 402 and the circular plate 404, the flange plate 404 extrudes the circular plate 404 backwards, the circular plate 404 drives the spline rod 403 to move backwards, the first spring 405 is compressed, the flange is attached to the left side face of the circular plate 404 and is in a vertical state, and the circular shell 402 is provided with a centering assembly which is used for enabling the circle center of the flange and the circle center of the inclined notch of the circular pipe to be on the same axis.

As shown in fig. 9 and 10, the centering assembly includes a second fixing ring 406, the second fixing ring 406 is fixedly connected to the right portion of the circular housing 402, four first fixing rods 407 are welded between the outer annular surface of the second fixing ring 406 and the inner annular surface of the circular housing 402, sliding blocks 408 are slidably connected to the four first fixing rods 407, second springs 409 are respectively sleeved on the outer side surfaces of the four first fixing rods 407, two ends of each second spring 409 are respectively fixedly connected to the circular housing 402 and the adjacent sliding block 408, positioning rods 410 are respectively welded on the left side surfaces of the four sliding blocks 408, the left ends of the four positioning rods 410 are respectively arranged in a pointed shape, the four positioning rods 410 are respectively slidably connected to the four sliding grooves of the circular plate 404, the rotating wheel at the front end of the first threaded rod 306 is slowly rotated to make the inner side surface of the end to be welded of the circular tube contact with the four positioning rods 410, when the fourth positioning rods 410 are all in contact with the inner side surface of the end to be welded of the circular tube, the circle centers of the flange plate and the end to be welded of the round pipe are positioned on the same axis, the four positioning rods 410 are used for being in contact positioning with the inner side surface of the end to be welded of the round pipe, the circle centers of the round pipe and the flange plate are quickly positioned, the welding efficiency of the round pipe and the flange plate is improved, the phenomenon that the circle centers of the round pipe and the flange plate are not aligned during welding, welding seams are deviated during welding is avoided, the welding effect of the round pipe and the flange plate is improved, third connecting rods 411 are welded on the right side surfaces of four sliding blocks 408, the right ends of the four third connecting rods 411 are rotatably connected with round balls, the four third connecting rods 411 respectively penetrate through four sliding grooves of the round shell 402 and are in sliding connection with the four sliding grooves, a support base 412 is bolted on the right side surface of the fixed shell 201, four limiting rods 413 are welded on the left side surface of the support base 412 at equal intervals, the left ends of the four limiting rods 413 are all welded on the right side surface of the round shell 402, a conical body 414 is slidably connected on the four limiting rods 413, the cone 414 slides and contacts with the round balls at the right ends of the four third connecting rods 411, the middle upper part of the supporting seat 412 is embedded with an electric push rod 415, and the telescopic rod of the electric push rod 415 is connected with the cone 414 through a bolt.

As shown in fig. 11 and 12, the automatic welding mechanism includes a fixing plate 501, the fixing plate 501 is bolted to the rear portion of the upper side of the workbench 1, a sliding slot is formed on the upper side of the fixing plate 501, a second fixing rod 502 is welded in the sliding slot of the fixing plate 501, an L-shaped sliding plate 503 is slidably connected in the sliding slot of the fixing plate 501, the second fixing rod 502 passes through the lower portion of the L-shaped sliding plate 503 and is slidably connected therewith, a third spring 504 is looped on the outer side of the second fixing rod 502, two ends of the third spring 504 are respectively fixedly connected to the fixing plate 501 and the L-shaped sliding plate 503, a square sliding slot is formed on the upper side of the L-shaped sliding plate 503, a second threaded rod 505 is rotatably connected in the square sliding slot of the L-shaped sliding plate 503, the rear end of the second threaded rod 505 passes through the L-shaped sliding plate 503 and is rotatably connected therewith, a rotating wheel is bolted to the rear end of the second threaded rod 505, a second sliding seat 506 is slidably connected in the square sliding slot of the L-shaped sliding plate 503, the second sliding seat 506 is in threaded connection with the second threaded rod 505, a second connecting plate 507 is hinged on the second sliding seat 506, a supporting rod 508 is welded at the front part of the second connecting plate 507, the supporting rod 508 is in sliding contact with the left side surface of the flange plate, a wire laying welding gun 509 is detachably mounted at the front part of the upper side surface of the second connecting plate 507, the contact position of the supporting rod 508 and the flange plate is adjusted, the phenomenon that the supporting rod 508 is in contact with a circumferential round hole in the flange plate to cause the deviation of a welding head of the wire laying welding gun 509 and to be far away from a welding seam between the flange plate and a circular pipe is avoided, the welding effect of the flange plate and the circular pipe is improved, the supporting rod 508 is extruded on the flange plate, the wire laying welding gun 509 is enabled to uniformly weld the welding seam between the circular pipe and the flange plate all the time by changing the position of the L-shaped sliding plate 503, the welding seam is prevented from being non-uniform during welding, and the circular pipe and the flange plate are automatically welded by the wire laying welding gun, the labor intensity of workers is reduced, and the working efficiency is improved.

When the device is used, an operator places the flange plate between the four extrusion blocks 209, the flange plate extrudes the circular plate 404 backwards, the circular plate 404 drives the spline rod 403 to move backwards, the first spring 405 is compressed, the flange plate is attached to the left side surface of the circular plate 404 to enable the flange plate to be in a vertical state, then the operator starts the first electric hydraulic push rod 213, the telescopic rod of the first electric hydraulic push rod 213 pushes the connecting block at the rear part of the conical shell 212 to move towards the left side, the conical shell 212 moves towards the left side along the sliding groove of the fixed shell 201, the conical shell 212 extrudes the four first connecting rods 211, the four first connecting rods 211 slide towards the outer side along the conical shell 212, the four first connecting rods 211 drive the left sides of the adjacent extrusion blocks 209 to swing towards the inner side along the rotating shaft 208, the torsion spring 210 is extruded, the left sides of the four extrusion blocks 209 simultaneously extrude the outer ring surfaces of the flange plate to fix the flange plate, the operator then closes the first electro-hydraulic ram 213.

Then an operator places the circular tube on the rotating rollers at the upper ends of the two second supporting plates 304 and the two third supporting plates 305, then adjusts the inclined direction of the inclined end face of the circular tube, then the operator starts the second servo motor 217, the output shaft of the second servo motor 217 drives the second gear 218 on the second servo motor 217 to rotate, the second gear 218 drives the arc sliding plate 215 and other parts at the upper part of the arc sliding plate to rotate through the arc gear ring 216, the operator adjusts the rotating angle of the arc sliding plate 215 to enable the flange plate to adapt to different inclined angles of the ends to be welded of the circular tube, the application range of the device is enlarged, the practicability of the device is improved, when the flange plate swings to the same angle with the inclined cut angle of the circular tube, the operator closes the second servo motor 217, then the operator starts the electric push rod 415, the telescopic rod of the electric push rod 415 pushes the conical body 414 to the left side, the cone 414 slides leftwards along the four limit rods 413, the outer side surface of the cone 414 extrudes the right ends of the four third connecting rods 411, the four third connecting rods 411 are far away from and move along the four sliding grooves of the circular shell 402 after being subjected to extrusion force, the four third connecting rods 411 respectively drive the sliding blocks 408 fixedly connected with the third connecting rods and the positioning rods 410 to be far away from and move along the first fixing rods 407, the four second springs 409 are compressed, the four third connecting rods 411 are far away from and slide along the four sliding grooves of the circular plate 404, the four positioning rods 410 extrude the central holes of the flange plate, and an operator closes the electric push rod 415.

An operator rotates a rotating wheel at the front end of the first threaded rod 306 to enable the first threaded rod 306 to rotate clockwise or anticlockwise, the first threaded rod 306 drives the two sliding plates 303 on the left side to move away from or close to each other to slide, when the two sliding plates 303 on the left side move away from and slide, the lower parts of the second supporting plate 304 and the third supporting plate 305 on the left side move away from and slide, the upper ends of the second supporting plate 304 and the third supporting plate 305 on the left side and the rotating rollers on the upper parts of the second supporting plate 304 and the third supporting plate 305 on the left side are away from and slide, the two second supporting plates 304 and the third supporting plate 305 on the left side respectively drive the lower parts of the second supporting plate 304 and the third supporting plate 305 on the right side to move away from and slide through the second connecting rod 307, so that the two second supporting plates 304 and the two third supporting plates 305 drive the circular pipe to move downwards, when the two sliding plates 303 on the left side close to slide, the two second supporting plates 304 and the two third supporting plates 305 drive the circular pipe to move upwards, an operator slowly rotates a rotating wheel at the front end of the first threaded rod 306, the inner side face of the end to be welded of the circular tube is in contact with the four positioning rods 410, when the fourth positioning rod 410 is in contact with the inner side face of the end to be welded of the circular tube, the circle centers of the end to be welded of the flange plate and the circular tube are on the same axis, the inner side face of the end to be welded of the circular tube and the circular tube is in contact positioning by the four positioning rods 410 and the circular tube, the circle centers of the circular tube and the flange plate are quickly positioned, the welding efficiency of the circular tube and the flange plate is improved, the phenomenon that the circle centers of the circular tube and the flange plate are not aligned during welding is avoided, the welding effect of the circular tube and the flange plate is improved, the first threaded rod 306 is used for driving the two left sliding plates 303 to be away from or close to slide mutually, the height of the circular tube and the flange plate are adjusted, the operation is complicated during the welding of the circular tube and the flange plate, and the production efficiency is effectively improved.

Distance between operating personnel adjustment pipe and the ring flange, adjust the welding seam to suitable distance after, operating personnel starts the electronic hydraulic rod 312 of second, the telescopic link of the electronic hydraulic rod 312 of second is driving first sliding seat 310 and electronic round 311 and is moving down along guide bar 309, make electronic round 311 extrude the lateral surface of pipe, operating personnel closes the electronic hydraulic rod 312 of second afterwards, the rubber ring of electronic round 311 lateral surface takes place to deform, the area of contact between electronic round 311 and the pipe has been increased, the frictional force between electronic round 311 and the pipe has been improved, avoided the pipe to take place to skid at rotation in-process electronic round 311 and pipe, the effect of pipe and ring flange welded has been improved.

The operator restarts the electric push rod 415 to make the telescopic rod of the electric push rod 415 drive the cone 414 to reset, then the operator closes the electric push rod 415, the cone 414 resets and loses the extrusion on the four third connecting rods 411, the sliding block 408 and the positioning rod 410 reset under the action of the elastic force of the four second springs 409, the operator then swings the second connecting plate 507 to the front side, the second connecting plate 507 drives the supporting rod 508 and the laying welding gun 509 to swing to the front side, the right end of the supporting rod 508 is extruded to the left side of the flange, then the operator adjusts the distance between the welding head of the laying welding gun 509 and the flange and the round tube, then fixes the laying welding gun 509, then the operator rotates the rotating wheel at the rear end of the second threaded rod 505 counterclockwise, the second threaded rod 505 drives the second sliding seat 506 and other parts at the upper part thereof to slide backwards through threads, when the second threaded rod 505 is rotated clockwise, the second sliding seat 506 and other parts on the upper portion of the second sliding seat slide forwards, the contact position of the support rod 508 and the flange plate is adjusted, the support rod 508 is prevented from contacting with a circumferential round hole in the flange plate, the welding head of the wire-laying welding gun 509 deviates and is far away from a welding seam between the flange plate and a circular tube, and the welding effect of the flange plate and the circular tube is improved.

Then, an operator starts the first servo motor 205, an output shaft of the first servo motor 205 drives a first gear 206 on the first servo motor to rotate, the first gear 206 rotates through a circular toothed ring 204 to enable a rotating ring 203 and other parts on the upper portion of the rotating ring to rotate, four extrusion blocks 209 drive a flange plate to slowly and uniformly rotate, a round ball at the rear end of four first connecting rods 211 is in sliding contact with the outer side face of a conical shell 212, friction between the rear ends of the four first connecting rods 211 and the conical shell 212 is reduced through the round ball at the rear end of the first connecting rods 211, damage to the first connecting rods 211 and the conical shell 212 caused by long-term use is avoided, the service life of the device is prolonged, the four fixing seats 207 drive a first fixing ring 401 to rotate, the circular shell 402 is fixed under the limiting effect of a limiting rod 413, the first fixing ring 401 rotates and slides relative to the circular shell 402, and simultaneously the operator starts an electric wheel 311, the electric wheel 311 drives the circular tube by friction, the circular tube slowly rotates at a constant speed on the rotating rollers at the upper ends of the two second support plates 304 and the two third support plates 305, the rotating speeds and directions of the circular tube and the flange are the same, then an operator starts the laying welding gun 509, the laying welding gun 509 welds the welding seam between the circular tube and the flange, the flange extrudes the support rod 508 to slide mutually when rotating, when the flange and the circular tube are welded at an included angle, the support rod 508 is extruded to the left side when the flange rotates, the L-shaped sliding plate 503 and other parts at the upper part of the L-shaped sliding plate 503 slide to the left side along the sliding groove of the fixing plate 501, meanwhile, the laying welding gun 509 also moves to the left side, but the distance between the welding head of the laying welding gun 509 and the welding seam between the circular tube and the flange is not changed, the support rod 508 is extruded on the flange, and the welding seam between the circular tube and the flange is uniformly welded by changing the position of the L-shaped sliding plate 503, the welding seam welding is prevented from being uneven during welding, and meanwhile, the circular tube and the flange plate are automatically welded through the wire-laying welding gun 509, so that the labor intensity of workers is reduced, and the working efficiency is improved.

After the round pipe and the flange plate rotate for a circle, an operator immediately closes the wire-laying welding gun 509, the electric wheel 311 and the first servo motor 205, then the operator rotates the second connecting plate 507 again to enable the support rod 508 and the wire-laying welding gun 509 to be far away from the welded pipe, the support rod 508 and the wire-laying welding gun 509 are far away from the welded pipe, so that the welded pipe can be conveniently taken out, then the operator starts the second electric hydraulic push rod 312, the telescopic rod of the second electric hydraulic push rod 312 drives the first sliding seat 310 and the electric wheel 311 to reset, then the operator starts the first electric hydraulic push rod 213, the telescopic rod of the first electric hydraulic push rod 213 drives the conical shell 212 to slide and reset towards the right side, then the first electric hydraulic push rod 213 is closed, the conical shell 212 loses extrusion on the four first connecting rods 211, and the four extrusion blocks 209 reset and extrude and fix the flange plate under the action of the torsion spring 210, operating personnel will weld the pipe fitting and take out afterwards, because arc slide 215's swing angle and second backup pad 304 and third backup pad 305 all do not remove, operating personnel only need to fix the ring flange and the pipe of equal model again, then repeated welding operation, so reciprocal ring flange and the pipe welding to same model, when the ring flange and the pipe of welding different models, need repeated above-mentioned operation, readjust this device, make this device be applicable to the ring flange and the pipe of different models.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipe fitting welding device with a rapid positioning function comprises a workbench (1) and is characterized by further comprising a flange fixing mechanism, wherein the flange fixing mechanism is arranged at the right part of the upper side face of the workbench (1) and used for fixing a flange plate and adjusted according to the inclination angle of a circular pipe notch, a positioning mechanism is arranged in the middle of the flange fixing mechanism and used for aligning the flange plate and the circular pipe inclined notch, a pipe fitting fixing mechanism is arranged at the left part of the upper side face of the workbench (1) and used for adjusting the pipe fitting fixing height and fixing the flange plate to the flange fixing mechanism, the positioning mechanism is started to position the flange plate, an operator adjusts the pipe fitting fixing mechanism according to the positioning mechanism to enable the inclined notch of the pipe fitting and the flange circle center to be located on the same axis, and an automatic welding mechanism is arranged at the rear part of the upper side face of the workbench (1), the automatic welding mechanism is used for welding according to the inclination angle of a flange to enable an inclined notch of a circular pipe to be welded with a flange plate, the positioning mechanism comprises a first fixing ring (401), the first fixing ring (401) is fixedly connected to a plurality of fixing seats (207) through a connecting block, the circle center of the first fixing ring (401) and the circle center of a rotating ring (203) are on the same axis, the inner annular surface of the first fixing ring (401) is rotatably connected with a circular shell (402), four sliding grooves are formed in the circular shell (402) at equal intervals, a spline rod (403) is slidably connected to the middle of the circular shell (402), a circular disc used for limiting is installed at the right end of the spline rod (403), a circular plate (404) is fixedly connected to the left end of the spline rod (403), four sliding grooves are formed in the circumferential direction of the circular plate (404) at equal intervals, a first spring (405) is sleeved on the outer side surface of the spline rod (403), two ends of the first spring (405) are fixedly connected to the circular shell (402) and the circular plate (404) respectively, the circular shell (402) is provided with a centering assembly, the centering assembly is used for enabling the center of a circle of the flange plate and the center of a circle of an inclined notch of the circular tube to be on the same axial line, the centering assembly comprises a second fixing ring (406), the second fixing ring (406) is fixedly connected to the right portion in the circular shell (402), four first fixing rods (407) are fixedly connected between the outer ring surface of the second fixing ring (406) and the inner ring surface of the circular shell (402), sliding blocks (408) are all connected to the four first fixing rods (407) in a sliding mode, second springs (409) are sleeved on the outer side surfaces of the four first fixing rods (407) in a surrounding mode, two ends of each second spring (409) are fixedly connected to the circular shell (402) and the adjacent sliding block (408) respectively, positioning rods (410) are fixedly connected to the left side surfaces of the four sliding blocks (408), the left ends of the four positioning rods (410) are all arranged in a pointed shape, and the four positioning rods (410) are connected to the four sliding chutes of the circular plate (404) respectively in a sliding mode, the right side surfaces of the four sliding blocks (408) are fixedly connected with third connecting rods (411), the right ends of the four third connecting rods (411) are rotatably connected with balls, the four third connecting rods (411) penetrate through four sliding grooves of the circular shell (402) respectively and are in sliding connection with the four sliding grooves, the right part of the upper side surface of the fixed shell (201) is fixedly connected with a supporting seat (412), the left side surface of the supporting seat (412) is fixedly connected with four limiting rods (413) at equal intervals, the left ends of the four limiting rods (413) are fixedly connected to the right side surface of the circular shell (402), the four limiting rods (413) are slidably connected with a conical body (414), the conical body (414) is in sliding contact with the balls at the right ends of the four third connecting rods (411), an electric push rod (415) is embedded in the upper part of the supporting seat (412), and an expansion rod of the electric push rod (415) is fixedly connected with the conical body (414).

2. The pipe welding equipment with the rapid positioning function as claimed in claim 1, wherein the flange fixing mechanism comprises a fixing shell (201), the fixing shell (201) is arranged at the right part of the upper side surface of the workbench (1), the left side surface of the fixing shell (201) is fixedly connected with a first supporting plate (202), the middle part of the first supporting plate (202) is provided with a circular through hole, the circular through hole of the first supporting plate (202) is rotatably connected with a rotating ring (203), the outer annular surface of the rotating ring (203) is fixedly connected with a circular toothed ring (204), the middle part of the upper side surface of the first supporting plate (202) is fixedly connected with a first servo motor (205) through a mounting seat, an output shaft of the first servo motor (205) is fixedly connected with a first gear (206), the first gear (206) is meshed with the circular toothed ring (204), a plurality of fixing seats (207) are fixedly connected with the inner annular surface of the rotating ring (203) at equal intervals in the circumferential direction, a plurality of fixing seats (207) are rotatably connected with rotating shafts (208), a plurality of rotating shafts (208) are fixedly connected with extrusion blocks (209), two parts of the plurality of rotating shafts (208) are sleeved with torsion springs (210), two ends of the plurality of torsion springs (210) are fixedly connected with the adjacent fixing seats (207) and the extrusion blocks (209) respectively, right ends of the plurality of extrusion blocks (209) are fixedly connected with first connecting rods (211), right ends of the plurality of first connecting rods (211) are rotatably connected with round balls for reducing friction force, sliding grooves are formed in the front and back parts of the inner side surface of the fixed shell (201), a conical shell (212) is slidably connected in the sliding groove of the fixed shell (201) through a connecting block, the outer side surface of the conical shell (212) is in contact fit with the round balls at the right ends of the plurality of first connecting rods (211), and a first electric hydraulic push rod (213) is fixedly connected to the rear part of the inner side surface of the fixed shell (201) through a mounting seat, the telescopic rod of the first electric hydraulic push rod (213) is fixedly connected with the connecting block at the upper rear part of the conical shell (212), and the lower part of the fixed shell (201) is provided with an angle adjusting component which is used for changing the swing angle of the flange plate.

3. The pipe welding equipment with the rapid positioning function as claimed in claim 2, wherein the left part of the inner side surface of each of the plurality of extrusion blocks (209) is provided with an anti-slip sheet for increasing the friction force between the extrusion block (209) and the flange.

4. The pipe welding equipment with the rapid positioning function as claimed in claim 2, wherein the angle adjusting assembly comprises an arc-shaped plate (214), the arc-shaped plate (214) is fixedly connected to the right portion of the upper side surface of the workbench (1), a sliding groove is formed in the upper side surface of the arc-shaped plate (214), an arc-shaped sliding plate (215) is slidably connected in the sliding groove of the arc-shaped plate (214), a fixed shell (201) is fixedly connected to the upper side surface of the arc-shaped sliding plate (215), the circle centers of the arc-shaped plate (214) and the arc-shaped sliding plate (215) and the centers of the plurality of extrusion blocks (209) are on the same vertical line, an arc-shaped gear ring (216) is fixedly connected to the inner ring surface of the arc-shaped sliding plate (215), a second servo motor (217) is embedded in the right portion of the workbench (1), the second servo motor (217) has a self-locking function, a second gear (218) is fixedly connected to an output shaft of the second servo motor (217), and the second gear (218) is meshed with the arc-shaped gear ring (216).

5. The pipe welding equipment with the rapid positioning function as claimed in claim 1, wherein the pipe fixing mechanism comprises a first connecting plate (301), the first connecting plate (301) is detachably mounted at the left part of the upper side surface of the worktable (1), the left and right parts of the upper side surface of the first connecting plate (301) are fixedly connected with rectangular shells (302), the front and rear parts in the two rectangular shells (302) are slidably connected with sliding plates (303), the upper parts of the two front sliding plates (303) are hinged with second supporting plates (304), the middle parts of the two second supporting plates (304) are provided with square through holes, the upper parts of the two rear sliding plates (303) are hinged with third supporting plates (305), the two third supporting plates (305) respectively pass through the square through holes of the adjacent second supporting plates (304), and the front and rear adjacent second supporting plates (304) are hinged with the third supporting plates (305), the upper ends of the two second supporting plates (304) and the two third supporting plates (305) are rotatably connected with rotating rollers, the rotating rollers are made of hard metal, a first threaded rod (306) is rotatably connected in the left rectangular shell (302), the first threaded rod (306) penetrates through the left two sliding plates (303) and is in threaded connection with the left sliding plates, the front and back threaded directions of the first threaded rod (306) are opposite, the front end of the first threaded rod (306) penetrates through the left rectangular shell (302) and is rotatably connected with the left rectangular shell, the front end of the first threaded rod (306) is fixedly connected with a rotating wheel, a sliding rod is fixedly connected in the right rectangular shell (302), the sliding rod in the right rectangular shell (302) penetrates through the right two sliding plates (303) and is in sliding connection with the right rectangular shell, second connecting rods (307) are fixedly connected between the lower parts of the two second supporting plates (304) and the two third supporting plates (305), the rear portion rigid coupling of side has vertical board (308) on first connecting plate (301), square through hole has been seted up at the middle part of vertical board (308), the equal rigid coupling in two parts has guide bar (309) about in the square through hole of vertical board (308), sliding connection has first sliding seat (310) in the square through hole of vertical board (308), two guide bar (309) all pass first sliding seat (310) and rather than sliding connection, the front portion of first sliding seat (310) is rotated and is connected with electronic round (311), the trailing flank of vertical board (308) has second electric hydraulic push rod (312) through the mount pad rigid coupling, the telescopic link and the first sliding seat (310) rigid coupling of second electric hydraulic push rod (312).

6. The pipe welding apparatus having the rapid positioning function as claimed in claim 5, wherein a rubber ring for increasing friction with the circular pipe is installed at an outer circumferential surface of the electric wheel (311).

7. The pipe welding equipment with the rapid positioning function as claimed in claim 1, wherein the left side surface of the circular plate (404) is rotatably connected with a plurality of steel balls at equal intervals, and the steel balls on the left side surface of the circular plate (404) are used for reducing the friction force with the flange.

8. The pipe welding equipment with the rapid positioning function as claimed in claim 1, wherein the automatic welding mechanism comprises a fixing plate (501), the fixing plate (501) is fixedly connected to the rear portion of the upper side of the workbench (1), a sliding groove is formed in the upper side of the fixing plate (501), a second fixing rod (502) is fixedly connected to the inside of the sliding groove of the fixing plate (501), an L-shaped sliding plate (503) is slidably connected to the sliding groove of the fixing plate (501), the second fixing rod (502) penetrates through the lower portion of the L-shaped sliding plate (503) and is slidably connected with the L-shaped sliding plate, a third spring (504) is annularly sleeved on the outer side of the second fixing rod (502), two ends of the third spring (504) are fixedly connected to the fixing plate (501) and the L-shaped sliding plate (503) respectively, a square sliding groove is formed in the upper side of the L-shaped sliding plate (503), a second threaded rod (505) is rotatably connected to the square sliding groove of the L-shaped sliding plate (503), the rear end of second threaded rod (505) passes L shape slide (503) and is connected rather than rotating, the rear end rigid coupling of second threaded rod (505) has the rotation wheel, sliding connection has second sliding seat (506) in the square spout of L shape slide (503), second sliding seat (506) and second threaded rod (505) threaded connection, it has second connecting plate (507) to articulate on second sliding seat (506), the anterior rigid coupling of second connecting plate (507) has bracing piece (508), bracing piece (508) and the left surface sliding contact of ring flange, wire laying welding torch (509) are installed to the anterior detachable of side on second connecting plate (507).