CN111716069A - Pipe external counterpart and its counterpart welding method - Google Patents

Abstract

The invention discloses an external mouthpiece for pipes, comprising: a main body, a misalignment amount control device, a gap control device, and a buckle device. The invention also discloses a butt welding method of the pipe external counterpart. When using the invention for butt welding of pipes, the amount of misalignment and the gap can be effectively controlled, and it is especially suitable for the installation of pairs of pipes with a diameter of 200 mm and above.

Description

Pipe external counterpart and its counterpart welding method

technical field

The invention relates to a pipeline welding technology, in particular, to a pipeline external counterpart and a counterpart welding method thereof.

Background technique

The pairing device is a tool used to adjust the pairing of the butt joints of the pipeline and the pipeline when the pipeline is installed. Usually, according to the position of use, it is divided into two types: inner tube counterpart and outer tube counterpart; according to the power source, it is divided into hydraulic, pneumatic and mechanical forms.

When the pipeline group is welded, the control of the amount of misalignment and the gap directly affects the welding quality. It is difficult to control the amount of misalignment and the gap of the weld joint in the past, so that the amount of misalignment and the gap can be kept uniform. The assembly and disassembly of the mouthpiece is complicated, and auxiliary tools such as jacks are required for pairing. Without removing the mouthpiece, some welds cannot be bottomed.

SUMMARY OF THE INVENTION

The technical problem solved by the present invention is to provide an external pipe fitting and a butt welding method thereof, which can effectively control the amount of misalignment and the gap when the pipes are butt welded, and is especially suitable for the installation of pipes with a diameter of 200mm and above.

The technical solution is as follows:

The pipe external mouthpiece includes: a main body, a misalignment amount control device, a gap control device, and a buckle device; the main body includes two annular splits, and the splits include two semi-circular arc-shaped plates, one end of which passes through the two semi-circular arc-shaped plates The first bolts are hinged together, and the other end is connected by a buckle device; the misalignment amount control device is connected between the two split bodies, and the misalignment amount control device comprises: a misalignment plate body, a first misalignment amount control screw, The second misalignment control screw; the misalignment plate body is provided with two first threaded through holes, and the first misaligned quantity control screw and the second misaligned quantity control screw are respectively installed in the two first threaded through holes inside; the gap control device is connected between the two split bodies, and the gap control device and the misalignment amount control device are arranged at intervals; the gap control device includes: a gap plate body and a gap control screw; the gap plate body is provided with a second threaded through hole , the clearance control screw rod is installed in the second threaded through hole, and the front end of the clearance control screw rod is provided with a tip.

Further, the main body is symmetrically provided with at least two pairs of misalignment amount control devices and gap control devices.

Further, a groove is provided on the staggered plate body between the two first threaded through holes.

Further, the included angle of the outer wall surface of the tip 34 is 30-70°.

Further, the buckle device includes: a handle, a hook and a connecting end plate; the end position of one semi-circular arc-shaped plate is hinged with the handle by means of a second bolt, and the connecting end plate is fixed on the side wall of the end position of the other semi-circular arc-shaped plate ; One end of the hook is movably connected to the handle, and the other end is hooked to the connecting end plate.

Further, the end caps of the first misalignment control screw, the second misalignment control screw, the clearance control screw, the first bolt and the second bolt are all in the form of inner and outer hexagons.

The butt welding method of the external butt joint of the pipeline, including:

Place the pipe external counterpart on the two pipe ends that need to be butt welded, open the connection of the snap device on the pipe external counterpart, and enclose the semi-circular arc plate from the outside of the pipe end to the nozzle position of the pipe end;

Hook the hook on the connecting end plate, close the handle, and tie the two split bodies to the nozzle positions of the two pipes respectively, and the opposite positions of the two pipes are located between the two split bodies;

Adjust the gap between the nozzles of the two pipes so that the amount of misalignment around the two nozzles is the same, and set the first misalignment control screw and the second misalignment control wire on the misalignment control device around the two nozzles. The rods are respectively tightened and pressed against the two nozzles to fix the relative positions of the two pipe nozzles;

Rotate the clearance control screw of the clearance control device, and the tip of the clearance control screw acts on the grooves of the two nozzles to achieve fine adjustment of the relative positions of the two grooves, control the width of the gap, and adjust the grooves of the two nozzles. Root welding is performed on all sides to complete the butt welding of the two nozzles.

Preferably, the misalignment control device is removed after the root welding is completed.

Preferably, a crowbar is used to pry the groove at the groove, so that the outer aligner of the rotating pipe is rotated on the pipe, so as to adjust the relative position of the outer aligner and the pipe, and align the nozzle gap of the two pipes.

Preferably, the diameter of the pipe is at least 200mm.

The technical effects of the present invention include:

The invention is convenient to use, easy to operate, low in cost, can be used repeatedly, can effectively control the amount of misalignment and clearance, and is especially suitable for the installation of pipeline pairs of DN200 (diameter 200mm) and above.

Description of drawings

Fig. 1 is the structural representation of the mouthpiece outside the pipeline in the present invention;

Fig. 2 is the structural representation of the misalignment amount control device in the present invention;

Fig. 3 is the structural representation of the gap control device in the present invention;

FIG. 4 is a schematic view of the structure of the end of the bolt in the form of inner and outer hexagons in the present invention.

Detailed ways

The following descriptions sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice and reproduce them.

As shown in FIG. 1 , it is a schematic structural diagram of the pipe external mouthpiece in the present invention.

The pipe external aligner includes: a main body 1 , a side offset control device 2 , a gap control device 3 , and a buckle device 4 ;

The main body 1 includes two annular split bodies 11 , the split bodies 11 include two semi-circular arc-shaped plates, one end of the two semi-circular arc-shaped plates is hinged together by a first bolt 7 , and the other end is connected by a snap device 4 . The buckle device 4 includes: a handle 41, a hook 42, and a connecting end plate 43; the end position of one semi-circular arc-shaped plate is hinged with the handle 41 by the second bolt 8, and the connecting end plate 43 is fixed on the end of the other semi-circular arc-shaped plate. One end of the hook 42 is movably connected to the handle 41, and the other end is hooked to the connecting end plate 43.

As shown in FIG. 2 , it is a schematic structural diagram of the misalignment amount control device 2 in the present invention.

The misalignment amount control device 2 is connected (welded) between the two separate bodies 11 , and four misalignment amount control devices 2 are symmetrically arranged around the main body 1 .

The misalignment amount control device 2 includes: a misalignment plate body 21, a first misalignment quantity control screw 22, and a second misalignment quantity control screw 23; the misalignment plate body 21 is provided with two first threaded through holes 25, The first misalignment control screw 22 and the second misalignment control screw 23 are respectively installed in the two first threaded through holes 25 , and the misaligned plate body 21 between the two first threaded through holes 25 is provided There are grooves 24 .

The first misalignment amount control screw 22 and the second misalignment amount control screw 23 on each misalignment amount control device 2 act on the ends of the two pipes that need to be matched respectively, and the first misalignment amount controls the screw rod. 22. The second misalignment control screw 23 is used to control the misalignment of the ends of the two pipes.

As shown in FIG. 3 , it is a schematic structural diagram of the gap control device 3 in the present invention.

The gap control device 3 is connected (welded) between the two separate bodies 11 . Four gap control devices 3 are symmetrically arranged around the main body 1 , and the gap control devices 3 and the misalignment amount control device 2 are arranged at intervals.

The gap control device 3 includes: a gap plate body 31 and a gap control screw rod 32; the gap plate body 31 is provided with a second threaded through hole 33, the gap control screw rod 32 is installed in the second threaded through hole 33, and the gap control screw rod 32 The front end is provided with a tip 34 . The angle between the outer walls of the tip 34 is 60°.

The gap control screw 32 on the gap control device 3 acts on the grooves of the two pipes that need to be opposite to each other. The gap control screw 32 controls the amount of misalignment at the ends of the two pipes. The gap control screw 32 controls the four azimuths. The depth of the tip 34 into the groove of the two nozzles controls the size of the gap.

As shown in FIG. 4 , it is a schematic diagram of the structure of the end of the bolt in the form of inner and outer hexagons in the present invention.

The first misalignment control screw 22, the second misalignment control screw 23, the clearance control screw 32, the first bolt 7, and the second bolt 8 are all in the form of inner and outer hexagons to meet the operation in various working environments. .

The butt welding method of the pipe external counterpart, the specific steps are as follows:

Step 1: Place the pipe external counterpart on the two pipe ends that need to be welded, open the connection of the snap device 4 on the pipe external counterpart, and enclose the semi-circular arc plate from the outside of the pipe end to the nozzle at the pipe end Location;

It can adapt to the installation of pipeline pairs of DN200 and above.

Step 2: Hook the hook 42 on the connecting end plate 43, close the handle 41, and clamp the two split bodies 11 on the nozzle positions of the two pipes respectively, and the opposite positions of the two pipes are located between the two split bodies 11;

Step 3: Adjust the gap between the nozzles of the two pipes, so that the amount of misalignment around the two nozzles is the same, and the first misalignment amount control device 2 around the two nozzles The misalignment control screw rods 23 are respectively tightened and pressed against the two nozzles to fix the relative positions of the two pipe nozzles;

Adjust the gap so that the amount of misalignment around the gap between the two nozzles is the same and meets the requirements of the specification. If you want to turn the outer mouthpiece of the pipe, use a crowbar to pry it at the groove 24 to rotate the outer mouthpiece of the pipe.

Step 4: Rotate the gap control screw 32 of the gap control device 3, and the tip 34 of the gap control screw 32 acts on the grooves of the two nozzles to achieve fine adjustment of the relative positions of the two grooves, control the width of the gap, and adjust the width of the gap. Root welding is performed around the grooves of the two nozzles to complete the butt welding of the two nozzles.

After the adjustment is completed, root welding can be implemented, and after 100% root welding is completed, the misalignment amount control device 2 is removed to provide an effective guarantee for the quality of the welding joint.

The terms used in the present invention are terms of description and illustration, not limitation. Since the invention can be embodied in many forms without departing from the spirit or essence of the invention, it is to be understood that the above-described embodiments are not limited to any of the foregoing details, but are to be construed broadly within the spirit and scope defined by the appended claims Therefore, all changes and modifications that come within the scope of the claims or their equivalents should be covered by the appended claims.

Claims (10)

1. A pipeline mouthpiece, characterized in that it comprises: a main body, a misalignment amount control device, a gap control device, and a buckle device; the main body comprises two annular splits, and the splits comprise two semicircular arc plates, One end of the two semi-circular arc-shaped plates is hinged together by the first bolt, and the other end is connected by a buckle device; the misalignment quantity control device is connected between the two split bodies, and the misalignment quantity control device comprises: the misalignment plate body, the first A misalignment amount control screw and a second misalignment control screw; the misalignment plate body is provided with two first threaded through holes, and the first misalignment control screw and the second misalignment control screw are respectively installed In the two first threaded through holes; the gap control device is connected between the two split bodies, and the gap control device and the misalignment amount control device are arranged at intervals; the gap control device includes: a gap plate body, a gap control screw; a gap plate The body is provided with a second threaded through hole, the clearance control screw rod is installed in the second threaded through hole, and the front end of the clearance control screw rod is provided with a tip. 2 . The pipe external aligner according to claim 1 , wherein the main body is symmetrically provided with at least two pairs of misalignment amount control devices and gap control devices. 3 . 3 . The mouthpiece of claim 1 , wherein a groove is provided on the staggered plate body between the two first threaded through holes. 4 . 4 . The pipe external mouthpiece according to claim 1 , wherein the included angle of the outer wall surface of the tip 34 is 30° to 70°. 5 . 5. The mouthpiece for pipes as claimed in claim 1, wherein the snap device comprises: a handle, a hook, and a connecting end plate; the end position of a semicircular arc plate is hinged with the handle by means of a second bolt, and the connecting end The plate is fixed on the side wall at the end of the other semi-circular arc plate; one end of the hook is movably connected to the handle, and the other end is hooked on the connecting end plate. 6. The mouthpiece of claim 5, wherein the ends of the first misalignment control screw, the second misalignment control screw, the clearance control screw, the first bolt, and the second bolt are The caps are in the form of inner and outer hexagons. 7. A butt welding method for a pipe external counterpart, comprising: Place the pipe external counterpart on the two pipe ends that need to be butt welded, open the connection of the snap device on the pipe external counterpart, and enclose the semi-circular arc plate from the outside of the pipe end to the nozzle position of the pipe end; Hook the hook on the connecting end plate, close the handle, and tie the two split bodies to the nozzle positions of the two pipes respectively, and the opposite positions of the two pipes are located between the two split bodies; Adjust the gap between the nozzles of the two pipes so that the amount of misalignment around the two nozzles is the same, and set the first misalignment control screw and the second misalignment control wire on the misalignment control device around the two nozzles. The rods are respectively tightened and pressed against the two nozzles to fix the relative positions of the two pipe nozzles; Rotate the clearance control screw of the clearance control device, and the tip of the clearance control screw acts on the grooves of the two nozzles to achieve fine adjustment of the relative positions of the two grooves, control the width of the gap, and adjust the grooves of the two nozzles. Root welding is performed on all sides to complete the butt welding of the two nozzles. 8 . The butt welding method of the pipe outer butt fitting according to claim 7 , wherein the misalignment amount control device is removed after the root welding is completed. 9 . 9. The butt welding method of the pipe external counterpart as claimed in claim 7, characterized in that, using a crowbar to be stuck in the groove and prying, so that the rotating pipe external counterpart is rotated on the pipeline to adjust the pipe external counterpart With the relative position of the pipe, align the nozzle gap of the two pipes. 10 . The butt welding method of the pipe external counterpart according to claim 1 , wherein the diameter of the pipe is at least 200 mm. 11 .

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