CN111906168B

CN111906168B - Pipeline installation axial shape correction method and shape correction tool

Info

Publication number: CN111906168B
Application number: CN202010748877.4A
Authority: CN
Inventors: 梁林; 李韬; 崔永永
Original assignee: Xian Aircraft Industry Group Co Ltd
Current assignee: Xian Aircraft Industry Group Co Ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2022-03-15
Anticipated expiration: 2040-07-29
Also published as: CN111906168A

Abstract

A pipeline installation axial correction method and a correction tool comprise a rigid correction pipe and a push rod assembly connected to the correction pipe, wherein the push rod assembly comprises a plurality of equal-length clamping push rods, a plurality of equal-length upper push rods, a plurality of equal-length lower push rods, a limiting sleeve and a plurality of joint joints; connecting the upper port of the calibration pipe with the pipe orifice of the pipeline, pressing the upper end of the clamping push rod on the outer wall of the pipeline, and pushing the limiting sleeve to enable the limiting hole in the limiting sleeve to limit and fix the spring button on the calibration pipe; the axial direction of the pipeline and the axial direction of the pipe orifice are driven by changing the axial direction of the correction pipe, so that the axial direction correction of the pipeline installation is realized.

Description

Pipeline installation axial shape correction method and shape correction tool

Technical Field

The invention relates to the technical field of aircraft pipeline installation, in particular to an axial type correction method and a type correction tool for pipeline installation.

Background

The hydraulic system of the airplane is an important part for normal work of structures such as landing gear, flap and vertical tail, the hydraulic system takes oil as a working medium, each execution component is driven to achieve specified actions by the aid of oil pressure, and pipelines are important passages reaching structural parts. The aircraft hydraulic pipeline has detailed assembly and test processes, and two important steps are not available. At present, due to factors such as pipeline materials, manufacturing tolerance and the like, when a pipeline is assembled, the phenomena that an opening expanding surface is not attached and a central line cannot be centered are easily generated, so that the pipeline is assembled to have larger stress. The existing hydraulic system allows the pipeline to be subjected to the shape correction operation for eliminating the stress of the pipeline, but the stress of the pipeline cannot be sufficiently eliminated only in the case of manual shape correction by an operator. After the pipeline assembly is completed, related cleaning and sealing tests need to be carried out, the sealing tests need to enable the interior of the pipeline to be full of oil and to keep a certain pressure, and the pipe joint connected with the pipeline is qualified without the phenomena of leakage, overflow and drip. In the process of pipeline assembly, if assembly stress exists, or the flaring surfaces are not attached and the central line is not centered, the leakage rate of the pipeline is greatly increased, and the sealing purpose is difficult to achieve. In order to improve the assembly quality of the pipeline and reduce the fault rate of leakage, overflow and drip of the pipeline, a simple, efficient and reliable correction tool is urgently needed.

Disclosure of Invention

According to the characteristics and requirements of airplane management and correction and the defects of the enjoyed technology, the application aims to provide an axial correction method and a correction tool for pipeline installation.

An axial calibration method for pipeline installation is characterized by comprising the following steps: 1) the calibrating tool comprises a rigid calibrating tube and a push rod component connected to the calibrating tube, wherein the upper port of the calibrating tube is matched with the tube opening of a pipeline, the push rod component comprises a plurality of equal-length clamping push rods, a plurality of equal-length upper push rods, a plurality of equal-length lower push rods, a limiting sleeve and a plurality of joint joints, the length of the lower push rod is greater than that of the clamping push rods, the length of the clamping push rods is greater than that of the upper push rods, each lower push rod corresponds to one upper push rod and one clamping push rod, the limiting sleeve is sleeved on the calibrating tube, a limiting hole is formed in the limiting sleeve, a spring button matched with the limiting hole is arranged on the calibrating tube, the lower push rods are radially and uniformly distributed and hinged on the outer side wall of the calibrating tube above the limiting sleeve, and the upper push rods are radially and uniformly distributed and hinged on the outer side wall of the calibrating tube above the limiting sleeve, each lower push rod is coaxially hinged with the upper end of the corresponding upper push rod and the lower end of the corresponding clamping push rod through a joint, the upper end of the clamping push rod points to the central extension line of the calibration tube, the clamping push rod and the upper push rod and the lower push rod which are correspondingly connected form a clamping arm, and the clamping arms are uniformly distributed around the calibration tube in the radial direction; 2) during correction, the upper port of the correction pipe is connected with the pipe orifice of the pipeline, the upper end of the clamping push rod is tightly pressed on the outer wall of the pipeline, and the limiting sleeve is pushed, so that the limiting hole in the limiting sleeve limits and fixes the spring button on the correction pipe; 3) the axial direction of the pipeline and the axial direction of the pipe orifice are driven by changing the axial direction of the correction pipe, so that the axial direction correction of the pipeline installation is realized.

The beneficial effect of this application lies in: through operations such as using pipeline school type instrument adjustment pipeline bending angle, guarantee that pipeline flaring face laminating, central line centering have promoted pipeline installation effectiveness, reach the low stress assembly requirement of pipeline. Meanwhile, the failure rate of the aircraft pipeline running, falling, dripping and leaking can be reduced by using the tool, and the product quality is improved. The shape correcting tool provided by the invention has a simple and reasonable structure, does not damage the shape of a pipeline interface, can be widely applied to flared hydraulic system pipelines, has a general trial rate on pipeline shape correction, and can be popularized to pipeline assembling systems of other types.

The present application is described in further detail below with reference to the accompanying drawings of embodiments.

Drawings

FIG. 1 is a schematic view of a calibration tool and a pipeline in an unclamped state.

FIG. 2 is a schematic view of a pipe calibration tool and a pipe clamp calibration state.

Fig. 3 is a schematic position diagram of the limiting sleeve and the calibration pipe in the state of fig. 1.

Fig. 4 is a schematic position diagram of the limiting sleeve and the calibration pipe in the state of fig. 2.

The numbering in the figures illustrates: the device comprises a pipeline 1, a fastening nut 2, a calibration pipe 3, a clamping push rod 4, an upper push rod 5, a lower push rod 6, a limiting sleeve 7, a fixing lug 8, a joint 9, a spring button 10, a limiting hole 11 and a connecting lug 12.

Detailed Description

Referring to the attached drawings, the sizing tool provided by the application comprises a rigid sizing pipe 3 and a push rod assembly connected to the sizing pipe, wherein the upper port of the sizing pipe 3 is matched with the pipe orifice of a pipeline 1, the push rod assembly comprises a plurality of equal-length clamping push rods 3, a plurality of equal-length upper push rods 4, a plurality of equal-length lower push rods 5, a limiting sleeve 7 and a plurality of joint joints 9, the length of the lower push rods 5 is greater than that of the clamping push rods 3, the length of the clamping push rods 3 is greater than that of the upper push rods 4, each lower push rod 5 corresponds to one upper push rod 4 and one clamping push rod 3, the limiting sleeve 7 is sleeved on the sizing pipe 3, limiting holes 11 are formed in the limiting sleeve 7, spring buttons 10 matched with the limiting holes 11 are formed in the sizing pipe 3, a plurality of uniformly distributed connecting lugs 12 are arranged on the limiting sleeve 7 for connecting the lower push rods 5, each connecting lug 12 is hinged with the lower end head of one lower push rod 5 through a pin shaft. The radial equipartition of lower part push rod 5 articulates in the outside of stop collar 7, for being connected with upper portion push rod 4, is equipped with the fixed auricle 8 of a plurality of equipartitions on the upper portion body of rod of school type pipe 2, and the position of fixed auricle is in the top of stop collar 7, and every fixed auricle 8 is articulated through the round pin axle with the lower end of an upper portion push rod 4.

The upper portion push rod 4 radially equipartition articulates on school type pipe 3 lateral wall above stop collar 7, and every lower part push rod 5 is coaxial articulated through a joint 9 with the upper end of the upper portion push rod 4 that corresponds and the lower extreme of the tight push rod 3 of corresponding clamp, and the center extension line of the directional school type pipe 2 in upper end of the tight push rod 3 of clamp, the upper end of the tight push rod 3 of clamp is the arc structure that matches with 1 outer wall of pipeline best to press from both sides the laminating of pipeline outer wall tightly. The clamping push rod 3 and the upper push rod 4 and the lower push rod 5 which are correspondingly connected form a clamping arm, and a plurality of clamping arms are uniformly distributed around the calibration pipe 3 in the radial direction.

The push rod assembly in the embodiment comprises three clamping push rods 3 with equal length, three upper push rods 4 with equal length, three lower push rods 5 with equal length, a limiting sleeve 7 and three joint joints 9, so that three clamping arms are formed and are radially and uniformly distributed around the correction pipe.

When the hydraulic pipeline of the airplane is calibrated, the upper port of the calibration pipe 3 is connected with the pipe orifice of the pipeline 1 through the fastening nut 2, the upper end of the clamping push rod 3 is tightly pressed on the outer wall of the pipeline 2, the limiting sleeve 7 is pushed upwards, the limiting hole 11 on the limiting sleeve 7 limits and fixes the spring button 10 on the calibration pipe 3, and at the moment, the upper end of the clamping push rod 3 tightly embraces and fixes the outer wall of the pipeline 2, so that the calibration pipe and the pipeline form an integral structure; finally, the axial direction of the pipeline 1 and the pipe orifice is driven by changing the axial direction of the correction pipe 3, so that the axial direction correction of the pipeline 1 is realized.

Claims

1. An axial calibration method for pipeline installation is characterized by comprising the following steps: 1) the calibrating tool comprises a rigid calibrating tube and a push rod component connected to the calibrating tube, wherein the upper port of the calibrating tube is matched with the tube opening of a pipeline, the push rod component comprises a plurality of equal-length clamping push rods, a plurality of equal-length upper push rods, a plurality of equal-length lower push rods, a limiting sleeve and a plurality of joint joints, the length of the lower push rod is greater than that of the clamping push rods, the length of the clamping push rods is greater than that of the upper push rods, each lower push rod corresponds to one upper push rod and one clamping push rod, the limiting sleeve is sleeved on the calibrating tube, a limiting hole is formed in the limiting sleeve, a spring button matched with the limiting hole is arranged on the calibrating tube, the lower push rods are radially and uniformly distributed and hinged on the outer side wall of the calibrating tube above the limiting sleeve, and the upper push rods are radially and uniformly distributed and hinged on the outer side wall of the calibrating tube above the limiting sleeve, each lower push rod is coaxially hinged with the upper end of the corresponding upper push rod and the lower end of the corresponding clamping push rod through a joint, the upper end of the clamping push rod points to the central extension line of the calibration tube, the clamping push rod and the upper push rod and the lower push rod which are correspondingly connected form a clamping arm, and the clamping arms are uniformly distributed around the calibration tube in the radial direction; 2) during correction, the upper port of the correction pipe is connected with the pipe orifice of the pipeline, the upper end of the clamping push rod is tightly pressed on the outer wall of the pipeline, and the limiting sleeve is pushed, so that the limiting hole in the limiting sleeve limits and fixes the spring button on the correction pipe; 3) the axial direction of the pipeline and the axial direction of the pipe orifice are driven by changing the axial direction of the correction pipe, so that the axial direction correction of the pipeline installation is realized.

2. An axial calibration tool for pipeline installation is characterized by comprising a rigid calibration pipe and a push rod assembly connected to the calibration pipe, wherein the upper port of the calibration pipe is matched with the pipe orifice of the pipeline, the push rod assembly comprises a plurality of equal-length clamping push rods, a plurality of equal-length upper push rods, a plurality of equal-length lower push rods, a limiting sleeve and a plurality of joint joints, the length of the lower push rod is greater than that of the clamping push rods, the length of the clamping push rods is greater than that of the upper push rods, each lower push rod corresponds to one upper push rod and one clamping push rod, the limiting sleeve is sleeved on the calibration pipe, a limiting hole is formed in the limiting sleeve, a spring button matched with the limiting hole is arranged on the calibration pipe, the lower push rods are radially and uniformly distributed on the outer side of the limiting sleeve, and the upper push rods are radially and uniformly distributed on the outer side wall of the calibration pipe above the limiting sleeve, each lower push rod is coaxially hinged with the upper end of the corresponding upper push rod and the lower end of the corresponding clamping push rod through a joint, the upper end of the clamping push rod points to the central extension line of the calibration tube, the clamping push rod and the upper push rod and the lower push rod which are correspondingly connected form a clamping arm, and the clamping arms are radially and uniformly distributed around the calibration tube.

3. The pipe installation axial profiling tool of claim 2, wherein the upper end of the clamping ram is of an arcuate configuration to mate with the outer wall of the pipe.

4. The axial model calibrating tool for pipeline installation according to claim 2 or 3, wherein a plurality of uniformly distributed connection lugs are arranged on the limiting sleeve, each connection lug is hinged with the lower end of a lower push rod, a plurality of uniformly distributed fixed lugs are arranged on the upper rod body of the model calibrating tube, and each fixed lug is hinged with the lower end of an upper push rod.

5. The tool of claim 4, wherein the push rod assembly comprises three equal length clamping push rods, three equal length upper push rods, three equal length lower push rods, a stop sleeve and three knuckle joints forming three clamping arms radially spaced around the sizing tube.