CN104439840B

CN104439840B - Flange welding positioning device

Info

Publication number: CN104439840B
Application number: CN201410699841.6A
Authority: CN
Inventors: 李定山
Original assignee: CHONGQING CHANGFENG CHEMICAL INDUSTRY CO LTD
Current assignee: CHONGQING CHANGFENG CHEMICAL INDUSTRY CO LTD
Priority date: 2014-11-28
Filing date: 2014-11-28
Publication date: 2023-05-23
Anticipated expiration: 2034-11-28
Also published as: CN104439840A

Abstract

The scheme relates to a flange for pipeline connection, in particular to a flange welding positioning device, which comprises a semi-annular clamp with the inner wall in line contact with the outer wall of a pipeline, wherein two ends of the clamp are turned over towards the direction deviating from the pipeline, a bulge is arranged at the center position of the clamp, a strip-shaped hole which is arranged along the radial direction of the pipeline is arranged in the bulge and deviating from the pipeline, a positioning pin with the size matched with that of a threaded hole of the flange is arranged in the strip-shaped hole, and the other end of the positioning pin is fixed in the strip-shaped hole through a bolt; two ends of the clamp are provided with a wire with smooth surface, the wire is penetrated with a hanging hammer, and the hanging hammer is provided with a fastening device for fastening the wire; adopt this patent technical scheme's ring flange welding position device can make the ring flange can very convenient location when the welding, avoids welding angle's mistake.

Description

Flange welding positioning device

Technical Field

The invention relates to a flange for pipeline connection, in particular to a flange plate welding positioning device.

Background

The flange connection is an important mode of pipeline construction, the main component is a flange plate, namely two pipelines or pipe fittings are respectively fixed on one flange plate, then a flange pad is added between the two flange plates, and finally the two flange plates are tightly combined by tightening the two flange plates through bolts to form a detachable joint.

Although the flange has many advantages, the welding installation of the flange plate is difficult, because of the problem of the flange plate on holes, and once the holes are not good, the subsequent installation process is extremely difficult, because in many cases, one of the pipelines is fixed, or other joints needing to be butted are required to be welded on the pipelines respectively, and the pipelines cannot rotate at will.

Disclosure of Invention

The invention aims to provide a flange welding positioning device which can conveniently position a flange during welding and avoid error of welding angles.

The flange welding positioning device comprises a semi-annular clamp with the inner wall in line contact with the outer wall of a pipeline, wherein two ends of the clamp are folded towards the direction deviating from the pipeline, a bulge is arranged at the center of the clamp, the bulge is deviated from the pipeline and is internally provided with a strip-shaped hole arranged along the radial direction of the pipeline, the strip-shaped hole is internally provided with a positioning pin with the size matched with that of a threaded hole of the flange, and the other end of the positioning pin is fixed into the strip-shaped hole through a bolt; the clamping hoop is characterized in that two ends of the clamping hoop are provided with a wire with a smooth surface, a hanging hammer is arranged on the wire in a penetrating mode, and a fastening device for fastening the wire is arranged on the hanging hammer.

The flange welding positioning device adopting the scheme has the following advantages: because the inner wall of semi-annular clamp and pipeline outer wall line contact, consequently relatively pivoted resistance is less, owing to the central point of clamp is provided with a arch, is provided with the locating pin that matches with the ring flange screw hole on the arch, rotates the clamp when using like this and will the locating pin earlier block into on a ring flange that has welded, then owing to the both ends of clamp are provided with the wire that is connected with a smooth surface, this wire wears to be equipped with a hammer, be provided with the fastener of fastening wire on the hammer, the hammer can down move under the effect of gravity, stabilizes in the central point vertical direction of pipeline, and fastener locking wire has obtained required location information this moment, finally takes off whole device, installs on the pipeline that waits to weld, and the hammer is stabilized gradually at the minimum under the effect of gravity this moment, and the position before the clamp reappears, then corresponding will wait to weld the ring flange to install and go and aim at the locating pin and can realize with the position matching of ring flange that has welded, the welding can begin.

As a preferable scheme, the length of the silk thread is 0.8-1 times of the circumference of the pipeline, and the silk thread has the advantages that the silk thread is long enough, cannot be attached to the outer wall of the pipeline, has small friction force, and cannot cause cost waste due to overlong silk thread, and the silk thread is obtained by multiple experiments of the applicant.

As the preferred scheme, the top of hammer is provided with an angle meter, the center of angle and the center hoisting point phase-match of hammer, and the benefit of doing so is that can be more convenient check hammer be located on the minimum, when the hammer is located the minimum, the contained angle of hammer both sides silk thread should be equal.

As the preferred scheme, still be provided with at least three evenly distributed's roller on the semi-ring clamp, roller and pipeline outer wall roll and set up, the benefit of doing so is that the ball can be supported from the both sides face of clamp, avoids its crooked that probably exists, and the introduction of ball is less relatively to frictional force's influence in addition, does not influence the measurement location.

Drawings

FIG. 1 is a schematic view of a positioning device for welding flanges according to an embodiment of the present invention;

fig. 2 is a schematic structural view of another position of the flange welding positioning apparatus according to the embodiment of the present invention.

Detailed Description

The invention is described in further detail below by way of specific embodiments:

reference numerals in the drawings of the specification include: the pipe comprises a pipe 1, a clamp 2, a bulge 3, a strip-shaped hole 4, a wire 5, a hanging hammer 6 and an angle gauge 7.

The flange welding positioning device of the embodiment is shown in fig. 1 and 2: the device comprises a semi-annular clamp 2 with the inner wall in line contact with the outer wall of a pipeline 1, wherein two ends of the clamp 2 are folded towards the direction deviating from the pipeline, a bulge 3 is arranged at the center position of the clamp 2, the bulge 3 is deviated from the pipeline 1, a strip-shaped hole 4 arranged along the radial direction of the pipeline 1 is arranged in the bulge 3, a positioning pin with the size matched with that of a threaded hole of a flange plate is arranged in the strip-shaped hole 4, and the other end of the positioning pin is fixed in the strip-shaped hole through a bolt; the clamp 2 is provided with the silk thread 5 that is connected with a smooth surface at both ends, silk thread 5 wears to be equipped with a hammer 6, be provided with the fastening screw of fastening silk thread 5 on the hammer 6, the length of silk thread 5 is 0.8 ~ 1 times of pipeline girth, select 0.9 times here, silk thread 5 can not laminate pipeline 1 outer wall like this, frictional force is little, the top of hammer 6 is provided with an angle gauge 7, the center of angle gauge 7 and the center hoisting point phase-match of hammer 6, in order to conveniently inspect whether hammer 6 is located the minimum, when hammer 6 is located the minimum, the contained angle of hammer 6 both sides silk thread 5 should be equal, still be provided with at least three evenly distributed's roller on the semi-annular clamp 2, the roller rolls with pipeline 1 outer wall setting, support from the both sides face of clamp 2, avoid its possible skew.

The flange welding positioning device of the scheme works as follows: firstly, the semi-annular clamp 2 is placed on a pipeline 1 with a flange plate welded, then a boss 3 at the center of the clamp 2 corresponds to a threaded hole near the flange plate, a locating pin is clamped into the threaded hole, the clamp is fixed in position, a fastening screw on a lifting hammer 6 is loosened, the lifting hammer 6 can slide relative to a wire 5, the lifting hammer 6 moves downwards under the action of gravity and is stabilized in the vertical direction of the center of the pipeline 1, then the wire 5 is locked through the fastening screw, the whole device is kept stationary under the action of gravity, even if the locating pin is removed and is also maintained, the whole device is transferred to the end part of the pipeline 1 with the flange plate to be welded, the lifting hammer 6 moves downwards under the action of gravity and is redetermined in the vertical direction of the center of the pipeline 1, the position of the locating pin is matched with the threaded hole of the welded flange plate, the corresponding flange plate to be welded is installed, the locating pin is aligned, and finally, the welding is completed, and the whole device is removed.

The foregoing is merely exemplary embodiments of the present invention, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. Flange plate welding positioning device, its characterized in that: the device comprises a semi-annular clamp with the inner wall in line contact with the outer wall of a pipeline, wherein two ends of the clamp are turned over towards the direction deviating from the pipeline, a bulge is arranged at the central position of the clamp, the bulge is deviated from the pipeline and is internally provided with a strip-shaped hole arranged along the radial direction of the pipeline, a positioning pin matched with a threaded hole of a flange plate in size is arranged in the strip-shaped hole, and the other end of the positioning pin is fixed in the strip-shaped hole through a bolt; the top of the hanging hammer is provided with an angle gauge, and the center of the angle gauge is matched with the center hanging point of the hanging hammer; and at least three evenly distributed rollers are further arranged on the semi-annular clamp, and the rollers and the outer wall of the pipeline roll.

2. The flange welding positioning apparatus according to claim 1, wherein: the length of the silk thread is 0.8-1 times of the circumference of the pipeline.