CN215967057U - Small-size portable pipe welding machine - Google Patents

Abstract

The utility model discloses a small portable circular tube welding machine, two fixing mechanisms are respectively detachably connected with a supporting seat, a surrounding welding outer ring is detachably connected with the supporting seat, and is positioned on the outer side surface of the surrounding welding outer ring, the surrounding welding inner ring is connected with the surrounding welding outer ring in a sliding way, the surrounding welding outer ring is sleeved on the outer side surface of the surrounding welding outer ring, the two first transmission mechanisms respectively penetrate through the surrounding welding outer ring, and are engaged with the side surface of the encircling welding inner ring, the two fixing mechanisms fix the two circular tubes to be welded, and abutting them at the inner ring of the encircling weld, the first transmission mechanism rotating the inner ring of the encircling weld around the center of the circle, and the welding gun follows the encircling welding inner ring to perform circular motion and weld the joint of the two circular tubes. Therefore, automatic welding is realized, cooperation of multiple persons is not needed, and the working efficiency is improved.

Description

Small-size portable pipe welding machine

Technical Field

The utility model relates to the technical field of welding equipment, in particular to a small-sized portable circular tube welding machine.

Background

Welding is an ancient technical category, and plays an extremely important role in industrial production. Welding is an indispensable technology in the fields of mechanical industry, automobile industry, petrochemical industry and the like, and particularly, the welding technology is extremely highly dependent on outdoor large engineering construction projects, such as pipeline welding in the petrochemical industry, steel body structure welding in construction projects such as steel and the like. At present, the traditional outdoor welding work lacks necessary automatic welder, mainly relies on the manual welding mode of manpower to accomplish, because the welding work is loaded down with trivial details, needs many people to cooperate, leads to inefficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a small portable circular tube welding machine, and aims to solve the technical problems that the traditional outdoor welding work in the prior art lacks a necessary automatic welding device, is mainly completed by a manual welding mode and has low efficiency.

In order to achieve the purpose, the utility model adopts a small portable circular tube welding machine, which comprises a supporting seat, two fixing mechanisms and a welding mechanism, wherein the two fixing mechanisms are respectively detachably connected with the supporting seat and are both positioned at the top of the supporting seat, the welding mechanism is detachably connected with the fixing mechanisms and is positioned at the top of the supporting seat, the two fixing mechanisms are symmetrically arranged relative to the welding mechanism, the welding mechanism comprises a supporting frame, a surrounding welding outer ring, a surrounding welding inner ring, two groups of first transmission mechanisms, a welding gun and a welding gun height adjusting mechanism, the supporting frame is detachably connected with the supporting seat and is positioned at the top of the supporting seat, the surrounding welding outer ring is detachably connected with the supporting frame and is positioned at the outer side surface of the supporting frame, and the surrounding welding inner ring is connected with the surrounding welding outer ring in a sliding manner, the welding gun is characterized in that the outer ring of the surrounding welding is sleeved on the outer surface of the inner ring of the surrounding welding, the two first transmission mechanisms respectively penetrate through the outer ring of the surrounding welding and are meshed with the side surface of the inner ring of the surrounding welding, the welding gun height adjusting mechanism is detachably connected with the inner ring of the surrounding welding and is positioned on the side surface of the inner ring of the surrounding welding, and the welding gun is detachably connected with the welding gun height adjusting mechanism and is positioned on the side surface of the welding gun height adjusting mechanism.

The two fixing mechanisms fix two circular pipes to be welded and enable the two circular pipes to be in butt joint at the encircling welding inner ring, the first transmission mechanism enables the encircling welding inner ring to rotate around the circle center of the encircling welding inner ring, and the welding gun performs circular motion along with the encircling welding inner ring and simultaneously performs welding on the joint of the two circular pipes. Therefore, automatic welding is realized, cooperation of multiple persons is not needed, and the working efficiency is improved.

Each first transmission mechanism comprises a first motor, a first gear, a second gear and a third gear, the first motor is detachably connected with the side face of the encircling welding outer ring, the first gear is detachably connected with the first motor and is located on the side face of the first motor, the second gear is meshed with the first gear, the third gear is rotatably connected with the second gear and is located inside the encircling welding outer ring, and the third gear is meshed with the encircling welding inner ring.

The first motor provides power, and the power is transmitted by the first gear, the second gear and the third gear to drive the welding torch to move around the welding inner ring, so that the welding torch can weld the circular tube.

Wherein, the welding gun height adjusting mechanism comprises a shell, a first screw rod, a first knob, a sliding block, a first clamping block and a second clamping block, the shell is detachably connected with the encircling welding inner ring and is positioned on the side surface of the encircling welding inner ring, the side surface of the shell is provided with a sliding groove, one end of the first screw rod penetrates through the side wall of the sliding groove, the first knob is detachably connected with the other end of the first screw rod and is positioned on the side surface of the shell, the sliding block is in threaded connection with the first screw rod and is sleeved on the outer surface of the first screw rod, the first clamping block is detachably connected with the sliding block and is positioned on the side surface of the sliding block, the second clamping block is connected with the first clamping block through a bolt and is positioned on the side surface of the first clamping block, the welding gun is arranged between the first clamping block and the second clamping block, the first clamping block and the second clamping block are both abutted against the welding gun.

The first knob is rotated, the sliding block moves along the screw rod under the limitation of the sliding groove, so that the height of the welding gun is adjusted, the small portable circular tube welding machine can be adjusted according to the actual size of a circular tube, and the best welding effect is achieved. The first clamping block and the second clamping block are used for fixing the welding gun.

The supporting frame comprises a first supporting rod, a second supporting rod, a third supporting rod, a fourth gear and a second knob, one end of the first supporting rod is detachably connected with the supporting seat and is located at the top of the supporting seat, the second supporting rod is fixedly connected with the first supporting rod and is located on the side face of the first supporting rod and is horizontally arranged, one end of the third supporting rod is slidably connected with the second supporting rod and is sleeved on the outer surface of the second supporting rod, the other end of the third supporting rod is detachably connected with the surrounding welding outer ring, a connecting groove is formed in the third supporting rod and is communicated with the side face of the second supporting rod, and the fourth gear is rotatably connected with the connecting groove and is located in the connecting groove and is meshed with the side face of the second supporting rod.

And rotating the second knob to enable the third support rod to slide on the second support rod, so that the horizontal position of the welding gun is adjusted, the mouth of the welding gun and the welding line can be positioned on the same plane, and the welding quality is ensured.

Wherein, each fixing mechanism comprises a sliding table, a first fixing ring, two second fixing rings, six claw mechanisms and a second transmission mechanism, the sliding table is detachably connected with the top of the supporting seat and is positioned at the top of the supporting seat, the outer side surface of the first fixing ring is slidably connected with the sliding table and is positioned at the top of the sliding table, the outer side surfaces of the two second fixing rings are respectively connected with the sliding table and are both positioned at the top of the sliding table, the two second fixing rings are sleeved on the outer surface of the first fixing ring, a cavity is arranged between each second fixing ring and the first fixing ring, three claw structures are arranged inside each cavity, each cavity is communicated with the outside, the second transmission structure is fixedly connected with the side surface of the first fixing ring, and the second transmission mechanism is respectively rotatably connected with the side surfaces of the two second fixing rings, and is located on the side of the first retaining ring.

The second transmission mechanism enables the two second fixing rings to move towards the direction far away from the first fixing rings, and meanwhile, the two second fixing rings drive the jaw mechanism to contract, so that a circular pipe is fixed, and the stability of the circular pipe in the welding process is guaranteed.

Each jaw mechanism comprises a jaw and a rack, one end of the jaw is rotatably connected with the outer surface of the first fixing ring and is located in the cavity, the jaw is matched with the rack, and the rack is embedded into the inner surface of the second fixing ring correspondingly.

The linear motion of the rack drives the jaws to contract or expand, so that the circular tube is fixed or released.

Wherein, the second transmission structure includes second motor, fifth gear, two sixth gears and two second screw rods, the second motor with first solid fixed ring's surface fixed connection, and be located two between the solid fixed ring of second, the fifth gear with the connection can be dismantled to the second motor, and be located the top of second motor, two the sixth gear all with fifth gear engagement, and equal perpendicular to the fifth gear, every the one end of second screw rod with correspond the connection can be dismantled to the sixth gear, every the second screw rod with first solid fixed ring's surface rotates to be connected, and with correspond the solid fixed ring's of second surface threaded connection to be located the correspondence the solid fixed ring's of second surface.

The second motor provides power, and the fifth gear drives two simultaneously the motion of sixth gear for two the solid fixed ring of second can the simultaneous movement.

Wherein, the small-size portable pipe welding machine still includes two third drive mechanism, two the third drive mechanism is located the side of corresponding slip table respectively, every the third drive mechanism includes two first bearing, third screw rod, connecting block, seventh gear, eighth gear, second bearing, transfer line and hand wheel, two the first bearing respectively with the supporting seat can be dismantled and be connected, and all be located the top of supporting seat, the third screw rod respectively with two the first bearing rotates to be connected, and be located the top of supporting seat, the one end of connecting block can be dismantled with the surface that corresponds first solid fixed ring and be connected, the other end of connecting block with third screw rod threaded connection, and the cover is located the surface of third screw rod, the connecting block is located between two the first bearing, the seventh gear is detachably connected with one end of the third screw rod and is positioned above the supporting seat, the seventh gear is meshed with the eighth gear, the eighth gear is perpendicular to the seventh gear, the eighth gear is detachably connected with one end of the transmission rod and is positioned on the side face of the seventh gear, the other end of the transmission rod is detachably connected with the hand wheel and is positioned above the supporting seat, the second bearing seat is rotatably connected with the transmission rod and is positioned between the eighth gear and the hand wheel, and the bottom of the second bearing seat is detachably connected with the supporting seat and is positioned at the top of the supporting seat.

Third drive mechanism is used for adjusting first solid fixed ring's position, first ring drives two solid fixed ring removes to can be to two the position control of pipe, two pipes are fixed the back, still can adjust relative position, ensure the butt joint of two pipes, guarantee welding quality.

The small-size portable pipe welding machine still includes four foot supports, four the foot support all set up in the bottom of supporting seat, every the foot support includes fourth screw rod, bearing, end cover, nut and universal wheel, the fourth screw rod runs through the supporting seat, the nut with the fourth screw rod rotates to be connected, and is located in the recess of supporting seat bottom, the bearing with the nut rotates to be connected, and imbeds the bottom of supporting seat, and the cover is located the surface of nut, the end cover with the connection can be dismantled to the bottom of supporting seat, and with the nut joint, the universal wheel with the fourth screw rod rotates to be connected, and is located the bottom of fourth screw rod.

The foot support plays right the supporting role of supporting seat, it is rotatory the nut, the fourth screw rod relative with the supporting seat up-and-down motion, thereby adjusted the support frame is high with ground contact, consequently, the workman can adjust according to the construction environment of reality the height and the inclination of small-size portable pipe welding machine are convenient for construct.

The utility model has the beneficial effects that: the two fixing mechanisms fix two circular pipes to be welded and enable the two circular pipes to be in butt joint at the encircling welding inner ring, the first transmission mechanism enables the encircling welding inner ring to rotate around the circle center of the encircling welding inner ring, and the welding gun performs circular motion along with the encircling welding inner ring and simultaneously performs welding on the joint of the two circular pipes. Therefore, automatic welding is realized, cooperation of multiple persons is not needed, and the working efficiency is improved. The second transmission mechanism drives the two second fixing rings to move towards the direction away from the first fixing rings, and meanwhile, the claw mechanisms are driven to contract, so that the circular pipes are fixed, and the stability of the circular pipes in the welding process is guaranteed. When two pipes are fixed by the fixing mechanism, when the two pipes are not in a butt joint state, the hand wheel is rotated, the transmission rod drives the connecting block to move on the third screw rod, so that the left and right welded pipes are driven to slide along with the whole clamping mechanism, the two pipes are butted, and the welding quality is ensured. When the height of the four foot supports is not adjusted synchronously, the angle of the small portable circular tube welding machine can be changed, so that the angle of the welding machine can be adjusted. Simultaneously, the universal wheel is convenient for the removal of small-size portable pipe welding machine. The transmission of the transmission rod is utilized to drive the connecting block to move on the third screw rod, so that the left and right welded circular tubes are driven to slide together with the whole clamping mechanism, the butt joint of the two circular tubes is ensured, the position of the welding gun is adjusted by moving the second supporting rod, the mouth and the seam of the welding gun are ensured to be positioned on the same plane, and the welding quality is ensured.

Drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of the construction of a small portable circular pipe welder of the present invention.

FIG. 2 is a top view of the small portable circular tube welder of the present invention.

FIG. 3 is a front view of the small portable round tube welder of the present invention.

Fig. 4 is a schematic structural view of the height adjustment mechanism of the welding gun of the present invention.

Fig. 5 is a mechanism diagram of the first transmission mechanism of the present invention.

Fig. 6 is a cross-sectional view of the support bracket of the present invention.

1-a supporting seat, 2-a fixing mechanism, 3-a welding mechanism, 4-a supporting frame, 5-a surrounding welding outer ring, 6-a surrounding welding inner ring, 7-a first transmission mechanism, 8-a welding gun, 9-a welding gun height adjusting mechanism, 10-a first motor, 11-a first gear, 12-a second gear, 13-a third gear, 14-a first knob, 15-a shell, 16-a first screw, 17-a sliding block, 18-a first clamping block, 19-a second clamping block, 20-a sliding chute, 21-a first supporting rod, 22-a second supporting rod, 23-a third supporting rod, 24-a fourth gear, 25-a cavity, 26-a second knob, 27-a connecting groove, 28-a sliding table and 29-a first fixing ring, 30-a second fixing ring, 31-a jaw mechanism, 32-a second transmission mechanism, 33-a jaw, 34-a rack, 35-a second motor, 36-a fifth gear, 37-a sixth gear, 38-a second screw, 39-a third transmission mechanism, 40-a first bearing seat, 41-a third screw, 42-a connecting block, 43-a seventh gear, 44-an eighth gear, 45-a second bearing seat, 46-a transmission rod, 47-a hand wheel, 48-a foot support, 49-a fourth screw, 50-a bearing, 51-an end cover, 52-a nut and 53-a universal wheel.

Detailed Description

Reference will now be made in detail to embodiments of the utility model, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary intended for explaining the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 6, the utility model provides a small portable circular tube welding machine, which comprises a supporting seat 1, two fixing mechanisms 2 and a welding mechanism 3, wherein the two fixing mechanisms 2 are respectively detachably connected with the supporting seat 1 and are both positioned at the top of the supporting seat 1, the welding mechanism 3 is detachably connected with the fixing mechanisms 2 and is positioned at the top of the supporting seat 1, the two fixing mechanisms 2 are symmetrically arranged relative to the welding mechanism 3, the welding mechanism 3 comprises a supporting frame 4, a surrounding welding outer ring 5, a surrounding welding inner ring 6, two groups of first transmission mechanisms 7, a welding gun 8 and a welding gun height adjusting mechanism 9, the supporting frame 4 is detachably connected with the supporting seat 1 and is positioned at the top of the supporting seat 1, the surrounding welding outer ring 5 is detachably connected with the supporting frame 4 and is positioned at the outer side surface of the supporting frame 4, encircle welding inner ring 6 with encircle welding outer ring 5 sliding connection, encircle welding outer ring 5 cover and locate encircle the surface of welding inner ring 6, two first drive mechanism 7 runs through respectively encircle welding outer ring 5, and all with the side meshing of encircleing welding inner ring 6, welder height adjustment mechanism 9 with encircle welding inner ring 6 and can dismantle the connection, and be located encircle the side of welding inner ring 6, welder 8 with welder height adjustment mechanism 9 can dismantle the connection, and is located welder height adjustment mechanism 9's side.

In this embodiment, the two fixing mechanisms 2 fix two circular pipes to be welded and butt-joint them at the encircling welding inner ring 6, the first transmission mechanism rotates the encircling welding inner ring 6 around the center of the circle, and the welding gun 8 welds the joint of the two circular pipes while performing circular motion along with the encircling welding inner ring 6. Therefore, automatic welding is realized, cooperation of multiple persons is not needed, and the working efficiency is improved. The cross section of the encircling welding inner ring 6 is I-shaped, and the encircling welding outer ring 5 is clamped with grooves on two sides of the I-shaped, so that the encircling welding inner ring 6 can perform circular motion.

Further, each of the first transmission mechanisms 7 includes a first motor 10, a first gear 11, a second gear 12, and a third gear 13, the first motor 10 is detachably connected to a side surface of the girth welded outer ring 5, the first gear 11 is detachably connected to the first motor 10 and is located on a side surface of the first motor 10, the second gear 12 is engaged with the first gear 11, the third gear 13 is rotatably connected to the second gear 12 and is located inside the girth welded outer ring 5, and the third gear 13 is engaged with the girth welded inner ring 6.

In this embodiment, the encircling welding inner ring 6 and the first motor 10 are not directly engaged for transmission, but a gear reduction mechanism with a small transmission ratio is added between the encircling welding inner ring and the first motor, the first gear 11 is a primary driving wheel, the second gear 12 is a primary driven wheel, the third gear 13 is a secondary driving wheel, and the encircling welding inner ring 6 is a secondary driven wheel.

Further, the welding gun height adjusting mechanism 9 includes a housing 15, a first screw 16, a first knob 14, a sliding block 17, a first clamping block 18 and a second clamping block 19, the housing 15 is detachably connected to the welding encircling inner ring 6 and is located on the side surface of the welding encircling inner ring 6, a sliding slot 20 is formed in the side surface of the housing 15, one end of the first screw 16 penetrates through the side wall of the sliding slot 20, the first knob 14 is detachably connected to the other end of the first screw 16 and is located on the side surface of the housing 15, the sliding block 17 is in threaded connection with the first screw 16 and is sleeved on the outer surface of the first screw 16, the first clamping block 18 is detachably connected to the sliding block 17 and is located on the side surface of the sliding block 17, the second clamping block 19 is connected to the first clamping block 18 through a bolt and is located on the side surface of the first clamping block 18, the welding gun 8 is arranged between the first clamping block 18 and the second clamping block 19, and both the first clamping block 18 and the second clamping block 19 are abutted against the welding gun 8.

In this embodiment, the first knob 14 is rotated, and the slider 17 moves along the first screw 16 under the restriction of the sliding groove 20, so that the height of the welding gun 8 is adjusted, and the small portable circular tube welding machine can be adjusted according to the actual size of the circular tube, so that the best welding effect can be achieved. The first clamping block 18 and the second clamping block 19 form a clamping mechanism for fixing the welding gun 8. The first clamping block 18 is connected with a hole on the side surface of the sliding block 17, and a part of the first clamping block 18, which is positioned in the hole, is locked on the side edge of the sliding block 17 by using a screw. Constructors can rotate the angle of the clamping mechanism according to needs and fix the angle, so that the purpose of adjusting the angle of the welding gun 8 is achieved, and welding is facilitated.

Further, the supporting frame 4 comprises a first supporting rod 21, a second supporting rod 22, a third supporting rod 23, a fourth gear 24 and a second knob 26, one end of the first supporting rod 21 is detachably connected with the supporting seat 1 and is located at the top of the supporting seat 1, the second supporting rod 22 is fixedly connected with the first supporting rod 21 and is located at the side of the first supporting rod 21, the supporting frame is horizontally arranged, one end of the third supporting rod 23 is slidably connected with the second supporting rod 22 and is sleeved on the outer surface of the second supporting rod 22, the other end of the third supporting rod 23 is detachably connected with the outer ring 5, a connecting groove 27 is formed inside the third supporting rod 23, the connecting groove 27 is communicated with the side of the second supporting rod 22, the fourth gear 24 is rotatably connected with the connecting groove 27 and is located inside the connecting groove 27, and engages with the side of the second support bar 22.

In the embodiment, the left and right circular tubes need to be aligned and butted when the welded circular tubes are fixed, and the welded tubes cannot be bilaterally symmetrical about the welding gun 8 when the left and right welded tubes are respectively clamped, and the alignment and butting process adopts manual driving, so that the welded tubes are easily aligned and butted, and the seam is likely to be biased to one side of the mouth of the welding gun 8 due to the fact that the welded tubes are highly likely to be aligned and butted; if meeting more extreme welding environment, because one end of the welded pipe is a fixed end (the welded pipe which is welded is connected into a long pipeline and cannot be dragged at the moment), only the welded pipe on the other side can be dragged, after the butt joint is aligned, the welded joint can hardly be kept on the same plane with the welding gun mouth of the welding gun 8, the welding angle of the welding gun 8 is basically fixed, and the offset between the welded joint and the welding gun 8 head can not be eliminated by adjusting the angle of the welding gun 8. In order to solve this problem, the support frame 4 can be moved along the axis of the tube. And the second knob 26 is rotated to enable the third support rod 23 to slide on the second support rod 22, so that the horizontal position of the welding gun 8 is adjusted, the opening and the seam of the welding gun 8 are positioned on the same plane, and the welding quality is ensured.

Further, each fixing mechanism 2 comprises a sliding table 28, a first fixing ring 29, two second fixing rings 30, six clamping jaw 33 mechanisms 31 and a second transmission mechanism 32, the sliding table 28 is detachably connected with the top of the supporting seat 1 and is positioned at the top of the supporting seat 1, the outer side surface of the first fixing ring 29 is slidably connected with the sliding table 28 and is positioned at the top of the sliding table 28, the outer side surfaces of the two second fixing rings 30 are respectively connected with the sliding table 28 and are positioned at the top of the sliding table 28, the two second fixing rings 30 are sleeved on the outer surface of the first fixing ring 29, a cavity 25 is arranged between each second fixing ring 30 and the first fixing ring 29, three clamping jaw 33 structures are arranged inside each cavity 25, each cavity 25 is communicated with the outside, and the second transmission structure is fixedly connected with the side surface of the first fixing ring 29, the second transmission mechanism 32 is respectively connected with the side surfaces of the two second fixing rings 30 in a rotating manner and is positioned on the side surface of the first fixing ring 29.

In this embodiment, the second transmission mechanism 32 drives two second fixing rings 30 to move in the direction away from the first fixing ring 29, and simultaneously drives the jaw mechanism 31 to contract, so as to fix the circular tube and ensure the stability of the circular tube in the welding process.

Further, each jaw mechanism 31 comprises a jaw 33 and a rack 34, one end of the jaw 33 is rotatably connected with the outer surface of the first fixing ring 29, is located inside the cavity 25, and is engaged with the rack 34, and the rack 34 is embedded into the inner surface of the corresponding second fixing ring 30.

In this embodiment, one end of the claw 33 is engaged with the rack 34 on the inner wall of the second fixing ring 30, and when the second fixing ring 30 moves linearly, the claw 33 is driven to contract or expand, thereby fixing or releasing the circular tube.

Further, the second transmission structure includes a second motor 35, a fifth gear 36, two sixth gears 37 and two second screws 38, the second motor 35 is fixedly connected to the outer surface of the first fixing ring 29 and is located between the second fixing rings 30, the fifth gear 36 is detachably connected to the second motor 35 and is located above the second motor 35, the two sixth gears 37 are both engaged with the fifth gear 36 and are both perpendicular to the fifth gear 36, one end of each second screw 38 is detachably connected to the corresponding sixth gear 37, and each second screw 38 is rotatably connected to the outer surface of the first fixing ring 29 and is in threaded connection with the outer surface of the corresponding second fixing ring 30 and is located on the outer surface of the corresponding second fixing ring 30.

In the present embodiment, the second motor 35 and the two second screws 38 are connected by gears, and since the rotation speed of the servo motor can be as low as 1r/min, and the requirement of low rotation speed is met, the speed reduction design is not required, and therefore, the second transmission mechanism 32 directly adopts a constant speed gear pair for transmission, that is, an equi-large gear pair for transmission. Since the driving gears in the gear pair output torque in two opposite directions at the same time, the fifth gear 36 and the two sixth gears 37 are both bevel gears. By the fifth gear 36, the two sixth gears 37 move in two opposite directions at the same time, thereby realizing the movement of the second fixed ring 30.

Further, the small-sized portable circular tube welding machine further comprises two third transmission mechanisms 39, wherein the two third transmission mechanisms 39 are respectively located on the corresponding side surfaces of the sliding table 28, each third transmission mechanism 39 comprises two first bearing seats 40, a third screw rod 41, a connecting block 42, a seventh gear 43, an eighth gear 44, a second bearing seat 45, a transmission rod 46 and a hand wheel 47, the two first bearing seats 40 are respectively detachably connected with the supporting seat 1 and are located at the top of the supporting seat 1, the third screw rod 41 is respectively rotatably connected with the two first bearing seats 40 and is located above the supporting seat 1, one end of the connecting block 42 is detachably connected with the corresponding outer surface of the first fixing ring 29, the other end of the connecting block 42 is connected with the third screw rod 41 in a threaded manner and is sleeved on the outer surface of the third screw rod 41, the connecting block 42 is located between the two first bearing seats 40, the seventh gear 43 is detachably connected with one end of the third screw rod 41 and located above the supporting seat 1, the seventh gear 43 is engaged with the eighth gear 44, the eighth gear 44 is perpendicular to the seventh gear 43, the eighth gear 44 is detachably connected with one end of the transmission rod 46 and located on the side surface of the seventh gear 43, the other end of the transmission rod 46 is detachably connected with the hand wheel 47 and located above the supporting seat 1, the second bearing seat 45 is rotatably connected with the transmission rod 46 and located between the eighth gear 44 and the hand wheel 47, and the bottom of the second bearing seat 45 is detachably connected with the supporting seat 1 and located at the top of the supporting seat 1.

In this embodiment, after the two circular tubes are fixed by the fixing mechanism 2, when the two circular tubes are not in a butt joint state, the hand wheel 47 is rotated, the transmission rod 46 is utilized to drive the connecting block 42 to move on the third screw rod 41, so that the left and right welded circular tubes are driven to slide together with the whole clamping mechanism, the two circular tubes are butted, and the welding quality is ensured.

Further, small-size portable pipe welding machine still includes four foot supports 48, four foot supports 48 all set up in the bottom of supporting seat 1, every foot support 48 includes fourth screw rod 49, bearing 50, end cover 51, nut 52 and universal wheel 53, fourth screw rod 49 runs through supporting seat 1, nut 52 with the fourth screw rod rotates to be connected, and is located in the recess of supporting seat 1 bottom, bearing 50 with nut 52 rotates to be connected, and imbeds the bottom of supporting seat 1, and the cover is located the surface of nut 52, end cover 51 with the bottom of supporting seat 1 can be dismantled and be connected, and with nut 52 joint, universal wheel 53 with fourth screw rod 49 rotates to be connected, and is located the bottom of fourth screw rod 49.

In the present embodiment, by using the transmission characteristic of the screw nut 52, when the fourth screw 49 is controlled to rotate, since the nut 52 is fixed relative to the support base 1 and the fourth screw 49 is fixed relative to the ground, the nut 52 moves up and down relative to the fourth screw 49 to realize the height adjustment of the welding machine. When the four leg supports 48 are not adjusted in height synchronously, the angle of the small portable circular tube welding machine is also changed, so that the angle adjustment of the welding machine is realized. Meanwhile, the universal wheels 53 facilitate the movement of the small portable circular tube welding machine. Therefore, a worker can easily move the small portable circular tube welding machine, and the height and the inclination angle of the small portable circular tube welding machine can be adjusted according to the actual construction environment, so that construction is facilitated.

While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.

Claims (9)

1. A small-sized portable circular tube welding machine, which is characterized in that,

the welding device comprises a supporting seat, two fixing mechanisms and a welding mechanism, wherein the two fixing mechanisms are detachably connected with the supporting seat respectively and are positioned at the top of the supporting seat, the welding mechanism is detachably connected with the fixing mechanisms and is positioned at the top of the supporting seat, the two fixing mechanisms are symmetrically arranged relative to the welding mechanism, the welding mechanism comprises a supporting frame, a surrounding welding outer ring, a surrounding welding inner ring, two groups of first transmission mechanisms, a welding gun and a welding gun height adjusting mechanism, the supporting frame is detachably connected with the supporting seat and is positioned at the top of the supporting seat, the surrounding welding outer ring is detachably connected with the supporting frame and is positioned on the side surface of the supporting frame, the surrounding welding inner ring is slidably connected with the surrounding welding outer ring, and the surrounding welding outer ring is sleeved on the outer surface of the surrounding welding inner ring, the two first transmission mechanisms respectively penetrate through the surrounding welding outer ring and are meshed with the side face of the surrounding welding inner ring, the welding gun height adjusting mechanism is detachably connected with the surrounding welding inner ring and is positioned on the side face of the surrounding welding inner ring, and the welding gun is detachably connected with the welding gun height adjusting mechanism and is positioned on the side face of the welding gun height adjusting mechanism.

2. The small portable circular tube welding machine as defined in claim 1,

each first transmission mechanism comprises a first motor, a first gear, a second gear and a third gear, the first motor is detachably connected with the side face of the encircling welding outer ring, the first gear is detachably connected with the first motor and is positioned on the side face of the first motor, the second gear is meshed with the first gear, the third gear is rotatably connected with the second gear and is positioned inside the encircling welding outer ring, and the third gear is meshed with the encircling welding inner ring.

3. The small portable circular tube welding machine as defined in claim 1,

the welding gun height adjusting mechanism comprises a shell, a first screw rod, a first knob, a sliding block, a first clamping block and a second clamping block, wherein the shell is detachably connected with the encircling welding inner ring and is positioned on the side surface of the encircling welding inner ring, the side surface of the shell is provided with a sliding groove, one end of the first screw rod penetrates through the side wall of the sliding groove, the first knob is detachably connected with the other end of the first screw rod and is positioned on the side surface of the shell, the sliding block is in threaded connection with the first screw rod and is sleeved on the outer surface of the first screw rod, the first clamping block is detachably connected with the sliding block and is positioned on the side surface of the sliding block, the second clamping block is connected with the first clamping block through a bolt and is positioned on the side surface of the first clamping block, and the welding gun is arranged between the first clamping block and the second clamping block, the first clamping block and the second clamping block are both abutted against the welding gun.

4. The small portable circular tube welding machine as defined in claim 1,

the support frame comprises a first support rod, a second support rod, a third support rod, a fourth gear and a second knob, one end of the first support rod is connected with the support seat in a detachable mode and is located at the top of the support seat, the second support rod is fixedly connected with the first support rod and is located on the side face of the first support rod, the second support rod is horizontally arranged, one end of the third support rod is connected with the second support rod in a sliding mode and is sleeved on the outer surface of the second support rod, the other end of the third support rod is connected with the outer ring in a detachable mode, a connecting groove is formed in the third support rod, the connecting groove is communicated with the side face of the second support rod, and the fourth gear is connected with the connecting groove in a rotating mode and is located in the connecting groove and meshed with the side face of the second support rod.

5. The small portable circular tube welding machine as defined in claim 1,

each fixing mechanism comprises a sliding table, a first fixing ring, two second fixing rings, six jaw mechanisms and a second transmission mechanism, the sliding table is detachably connected with the top of the supporting seat and is positioned at the top of the supporting seat, the outer side surface of the first fixing ring is slidably connected with the sliding table and is positioned at the top of the sliding table, the outer side surfaces of the two second fixing rings are respectively connected with the sliding table and are both positioned at the top of the sliding table, the two second fixing rings are sleeved on the outer surface of the first fixing ring, a cavity is arranged between each second fixing ring and the first fixing ring, three jaw structures are arranged inside each cavity, each cavity is communicated with the outside, the second transmission structure is fixedly connected with the side surface of the first fixing ring, and the second transmission mechanism is respectively rotatably connected with the side surfaces of the two second fixing rings, and is located on the side of the first retaining ring.

6. The small portable circular tube welding machine as defined in claim 5,

every the jack catch mechanism includes jack catch and rack, the one end of jack catch with the surface of first solid fixed ring rotates to be connected, and is located the inside of cavity, and with the rack agrees with, the rack embedding corresponds the solid fixed ring's of second internal surface.

7. The small portable circular tube welding machine as defined in claim 5,

the second transmission structure comprises a second motor, a fifth gear, two sixth gears and two second screws, the second motor is fixedly connected with the outer surface of the first fixing ring and is positioned between the second fixing ring, the fifth gear is detachably connected with the second motor and is positioned above the second motor, the sixth gears are meshed with the fifth gear and are perpendicular to the fifth gear, each of the one ends of the second screws is connected with the corresponding sixth gear in a detachable mode, and each of the second screws is rotatably connected with the outer surface of the first fixing ring and is in threaded connection with the outer surface of the second fixing ring and is positioned on the outer surface of the second fixing ring.

8. The small portable circular tube welding machine as defined in claim 5,

the small-sized portable circular tube welding machine further comprises two third transmission mechanisms, wherein the two third transmission mechanisms are respectively positioned on the corresponding side faces of the sliding table, each third transmission mechanism comprises two first bearing seats, a third screw rod, a connecting block, a seventh gear, an eighth gear, a second bearing seat, a transmission rod and a hand wheel, the first bearing seats are respectively detachably connected with the supporting seat and are respectively positioned at the top of the supporting seat, the third screw rod is respectively rotatably connected with the two first bearing seats and is positioned above the supporting seat, one end of the connecting block is detachably connected with the corresponding outer surface of the first fixing ring, the other end of the connecting block is in threaded connection with the third screw rod and is sleeved on the outer surface of the third screw rod, the connecting block is positioned between the two first bearing seats, and the seventh gear is detachably connected with one end of the third screw rod, the second bearing seat is rotatably connected with the transmission rod and is positioned between the eighth gear and the hand wheel, and the bottom of the second bearing seat is detachably connected with the supporting seat and is positioned at the top of the supporting seat.

9. The small portable circular tube welding machine as defined in claim 1,

the small-size portable pipe welding machine still includes four foot supports, four the foot support all set up in the bottom of supporting seat, every the foot support includes fourth screw rod, bearing, end cover, nut and universal wheel, the fourth screw rod runs through the supporting seat, the nut with the fourth screw rod rotates to be connected, and is located in the recess of supporting seat bottom, the bearing with the nut rotates to be connected, and imbeds the bottom of supporting seat, and the cover is located the surface of nut, the end cover with the connection can be dismantled to the bottom of supporting seat, and with the nut joint, the universal wheel with the fourth screw rod rotates to be connected, and is located the bottom of fourth screw rod.

Images