CN212823712U

CN212823712U - Titanium pipe girth welding argon protection device

Info

Publication number: CN212823712U
Application number: CN202021014156.2U
Authority: CN
Inventors: 张勇; 谭伟杰; 张宝荣; 韩玉华; 张安定
Original assignee: Ningxia Dexin Hengtong Group Co ltd
Current assignee: Ningxia Dexin Hengtong Group Co ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-03-30
Anticipated expiration: 2030-06-05

Abstract

The utility model provides a titanium pipe boxing argon protection device, the device includes: the inner holes of the centering tools at the two ends can be determined according to the outer diameter of the titanium pipe to be welded, and the diameter of the inner hole of the centering tool is slightly larger than that of the titanium pipe to be welded; wherein, the excircle on the both ends inner circle of moving a section of thick bamboo is provided with annular inner roller groove, and the excircle that the section of thick bamboo moved a section of thick bamboo link is provided with annular outer roller groove, and the even cloth of a plurality of cylinder rod makes a section of thick bamboo and moves a section of thick bamboo and can rotate relatively in the annular passage that inner roller groove and outer roller formed, and the device can guarantee not have the air and get into the welding area from the pipeline outside when removing welder.

Description

Titanium pipe girth welding argon protection device

Technical Field

The utility model relates to a circumferential weld gas protection device especially relates to a titanium pipe circumferential weld argon gas protection device.

Background

During fusion welding, if the atmosphere is in direct contact with the high temperature molten pool, oxygen in the atmosphere oxidizes metals and various alloying elements. Nitrogen, water vapor and the like in the atmosphere enter a molten pool, and defects such as air holes, slag inclusion, cracks and the like are formed in a welding seam in the subsequent cooling process, so that the quality and the performance of the welding seam are deteriorated.

In the all-position welding process of the butt-jointed pipeline made of high-temperature easily-oxidized materials such as titanium alloy, the welded seam is oxidized by air at high temperature, the quality of the oxidized seam is reduced, and therefore protection during circumferential weld welding needs to be achieved by adopting a device or equipment to introduce argon.

SUMMERY OF THE UTILITY MODEL

The utility model provides a titanium pipe girth welding argon protection device for solving the problems existing in the prior art.

This boxing argon gas protection device includes: the inner holes of the centering tools at the two ends can be determined according to the outer diameter of the titanium pipe to be welded, and the diameter of the inner hole of the centering tool is slightly larger than that of the titanium pipe to be welded; wherein, the inner circles at the two ends of the movable cylinder are provided with annular inner roller grooves, the excircle of the connecting end of the fixed cylinder and the movable cylinder is provided with an annular outer roller groove, and a plurality of cylindrical rollers are uniformly distributed in an annular channel formed by the inner roller grooves and the outer roller grooves, so that the fixed cylinder and the movable cylinder can rotate relatively.

Furthermore, the two end surfaces of the movable cylinder are respectively provided with a snap ring through screws so as to prevent the fixed cylinder from being separated from the movable cylinder.

Furthermore, the clearance between each surface of the fixed cylinder and the movable cylinder is smaller than the clearance between each surface of the fixed cylinder and the movable cylinder and the cylindrical rod, so that the fixed cylinder and the movable cylinder are prevented from sliding friction when rotating relatively.

Furthermore, an argon inlet is respectively arranged on the excircle of the fixed cylinder.

Furthermore, a welding gun inlet is arranged on the movable cylinder, a flange ring is fixedly arranged around the welding gun inlet, and at least four screw holes are uniformly distributed on the flange ring so as to be fixedly connected with a welding gun.

Furthermore, an observation window is arranged near the welding gun inlet on the movable cylinder so as to adjust the distance between the welding gun and the welding seam.

Furthermore, an arc-shaped sliding cover with the area larger than the opening area of the observation window is arranged outside the observation window, and the arc-shaped sliding cover slides back and forth along the arc-shaped guide groove to open or close the observation window.

Furthermore, a baffle plate for preventing the arc sliding cover from falling out is arranged at one end, away from the welding gun inlet, of the arc guide groove.

Furthermore, two locking screws are further arranged at the position of the observation window on the outer arc surface of the arc-shaped guide groove, so that the arc-shaped sliding cover is tightly pressed at the observation window when observation is not needed.

The technical effects of the utility model reside in that: the movable cylinder in the device can keep the original position during welding, argon introduced from two sides enables air inside the tool to flow away from a gap between the tool and a pipeline, air is prevented from entering a welding area from the outside of the pipeline, an annular welding seam high-temperature area is protected by the argon in the protection device, welding quality is guaranteed, the welding seam is silvery white, the situation that the welding seam is brittle and plastic and is reduced due to the fact that titanium alloy absorbs oxygen, nitrogen and hydrogen in the air is avoided, and welding quality of the titanium alloy guide pipe is guaranteed.

Drawings

FIG. 1 is an isometric view of a medium ring welded argon shield of the present invention;

FIG. 2 is a front view of the middle ring welding argon gas protection device of the present invention;

FIG. 3 is a cross-sectional view of the middle ring welding argon shield apparatus of the present invention;

FIG. 4 is a cross-sectional view of the structure at the viewing window of the present invention;

fig. 5 is an assembly axonometric view of the middle ring welding argon shield device and the pipe to be welded of the utility model.

In the drawing, 1, a fixed cylinder, 2, a movable cylinder, 3, a cylindrical roller, 4, a clamping ring, 5, a centering tool, 6, an observation window, 7, an arc-shaped sliding cover, 8, an arc-shaped guide groove, 9, a locking screw, 10, a baffle, 11, an argon inlet, 12, an outer roller groove, 21, a welding gun inlet, 22, a flange ring, 23, an inner roller groove, 50, a circular pipe to be welded and 60, a driving roller are arranged.

Detailed Description

The following describes embodiments of the present invention with reference to fig. 1 to 4.

Fig. 1 and fig. 1 show the external structure of the argon arc welding device, a moving cylinder 2 arranged in the middle, fixed cylinders 1 arranged on two sides of the moving cylinder 2, and centering tools 5 installed on two outward end surfaces of the fixed cylinders 1 through threads, wherein inner holes of the centering tools 5 at two ends can be determined according to the outer diameter of a titanium tube to be welded, and the diameter of the inner hole of the centering tool 5 is slightly larger than that of the titanium tube to be welded.

FIG. 3 illustrates the internal structure of the argon arc welding device, the inner circles at the two ends of the movable cylinder 2 are provided with annular inner roller grooves 23, the outer circle at the connecting end of the fixed cylinder 1 and the movable cylinder 2 is provided with annular outer roller grooves 12, and a plurality of cylindrical rollers 3 are uniformly distributed in an annular channel formed by the inner roller grooves 23 and the outer roller grooves 12, so that the fixed cylinder 1 and the movable cylinder 2 can rotate relatively; two end faces of the movable cylinder 2 are respectively provided with a clamping ring 4 through screws to prevent the fixed cylinder 1 and the movable cylinder 2 from being separated, gaps between each face of the fixed cylinder 1 and the movable cylinder 2 are smaller than gaps between the fixed cylinder 1 and the movable cylinder 2 and between the fixed cylinder 1 and the movable cylinder 3, when relative rotation is prevented, the fixed cylinder 1 and the movable cylinder 2 generate sliding friction, the outer circle of the fixed cylinder 1 is provided with an argon inlet 11, the movable cylinder 2 is provided with a welding gun inlet 21, a flange ring 22 is fixedly arranged around the welding gun inlet 21, and at least four uniformly distributed screw holes are formed in the flange ring 22 so as to be fixedly connected with a welding gun.

Fig. 4 illustrates the structure of the observation window 6 on the argon arc welding protection device, one observation window 6 is opened near the welding gun inlet 21 on the movable cylinder 2 so as to adjust the distance between the welding gun and the welding seam, the observation window 6 is also provided with an arc sliding cover 7 with an area larger than the opening area of the observation window, the arc sliding cover 7 slides back and forth along the arc guide groove 8 so as to open or close the observation window, one end of the arc guide groove 8 far away from the welding gun inlet 21 is provided with a baffle 10 for preventing the arc sliding cover 7 from falling out, and the arc guide groove 8 extrados is also provided with two locking screws 9 at the position of the observation window 6 so as to compress the arc sliding cover 7 at the observation window 6 when observation is not needed.

Fig. 5 illustrates a state when the circular tube 50 to be welded is installed in the argon arc welding protection device, the driving rollers 60 for driving the circular tube 50 to be welded to rotate synchronously are arranged at two ends of the circular tube 50 to be welded, and during welding, the driving rollers 60 drive the circular tube 50 to be welded to rotate slowly, so that the welding gun installed on the movable cylinder 2 sweeps through an annular welding seam.

The working principle is as follows: before welding, selecting a centering tool 5 with a proper inner hole size to be arranged at two ends of a fixed cylinder 1, sleeving one end of the device from the excircle of a circular tube 50 to be welded, penetrating the other section of circular tube 50 to be welded from the inner hole of the centering tool 5 to enable a welding seam to be positioned in the middle of a movable cylinder 2, shifting an arc-shaped sliding cover 7, opening an observation window 6, integrally assembling a welding gun with the movable cylinder 2 through a flange ring 22, adjusting the distance between the welding gun and the welding seam, shifting the arc-shaped sliding cover 7, closing the observation window 6 and screwing a locking screw 9 after adjustment is finished;

an argon gas pipe is connected to the argon gas inlet 11, argon gas is introduced into the device, and air in the device is discharged from the device itself and an assembly gap between the device and the pipe. And starting the welding machine, driving the driving roller 60 to drive the circular tube 50 to be welded to slowly rotate, so that the welding gun arranged on the movable tube 2 sweeps the circular welding line, and the welding is finished.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. The utility model provides a titanium pipe boxing argon protection device which characterized in that, the device includes: the welding fixture comprises a movable barrel (2) arranged in the middle, fixed barrels (1) arranged on two sides of the movable barrel (2), and centering tools (5) installed on two outward end faces of the fixed barrels (1) through threads, wherein inner holes of the centering tools (5) at two ends can be determined according to the outer diameter of a titanium pipe to be welded, and the diameter of the inner hole of each centering tool (5) is slightly larger than that of the titanium pipe to be welded;

wherein, the inner circles at the two ends of the movable cylinder (2) are provided with annular inner roller grooves (23), the excircle of the connecting end of the fixed cylinder (1) and the movable cylinder (2) is provided with annular outer roller grooves (12), and a plurality of cylindrical rollers (3) are uniformly distributed in an annular channel formed by the inner roller grooves (23) and the outer roller grooves (12), so that the fixed cylinder (1) and the movable cylinder (2) can rotate relatively.

2. The titanium tube girth welding argon gas protection device of claim 1, characterized in that, snap rings (4) are respectively installed on two end surfaces of the movable cylinder (2) through screws so as to prevent the fixed cylinder (1) and the movable cylinder (2) from being separated.

3. The titanium tube girth welding argon gas protection device of claim 1, characterized in that the clearance between each surface of the fixed cylinder (1) and the movable cylinder (2) is smaller than the clearance between each surface of the fixed cylinder and the movable cylinder and the cylindrical rod (3), so that the fixed cylinder (1) and the movable cylinder (2) are prevented from sliding friction when rotating relatively.

4. The titanium tube girth welding argon gas protection device according to claim 1, characterized in that an argon gas inlet (11) is arranged on each outer circle of the fixed cylinder (1).

5. The argon gas protection device for titanium tube girth welding according to claim 1, wherein the movable cylinder (2) is provided with a welding gun inlet (21), a flange ring (22) is fixedly arranged around the welding gun inlet (21), and at least four screw holes are uniformly distributed on the flange ring (22) so as to be fixedly connected with a welding gun.

6. Argon shield for titanium pipe girth welding according to claim 5, characterized in that an observation window (6) is opened near the welding gun inlet (21) on the movable cylinder (2) to adjust the distance between the welding gun and the welding seam.

7. The titanium pipe girth welding argon gas protection device of claim 6, characterized in that, still be equipped with an area outside observation window (6) and be greater than self open area's arc sliding closure (7), arc sliding closure (7) are along arc guide slot (8) back and forth slip to open or close observation window.

8. The argon protection device for titanium pipe girth welding according to claim 7, wherein one end of the arc-shaped guide groove (8) far away from the welding gun inlet (21) is provided with a baffle (10) for preventing the arc-shaped sliding cover (7) from falling out.

9. The titanium tube girth welding argon gas protection device of claim 7, characterized in that, two locking screws (9) are arranged on the extrados of the arc-shaped guide groove (8) at the position of the observation window (6) so as to press the arc-shaped sliding cover (7) at the position of the observation window (6) when observation is not needed.