CN111089685A - Method for checking novel pipeline material of airplane - Google Patents
Method for checking novel pipeline material of airplane Download PDFInfo
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- CN111089685A CN111089685A CN201911379963.6A CN201911379963A CN111089685A CN 111089685 A CN111089685 A CN 111089685A CN 201911379963 A CN201911379963 A CN 201911379963A CN 111089685 A CN111089685 A CN 111089685A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2853—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipe joints or seals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2884—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for welds
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the field of examination and test of new materials, and provides a method for examining a novel pipeline material of an airplane, which comprises the following steps: step 1, manufacturing a typical pipeline test piece by using a novel material for welding the special-shaped pipeline according to a process specification; step 2, the pressure pipeline is respectively connected with flange joints (003) at two ends of the typical pipeline structure, and whether each joint is reliable is checked; step 3, slowly injecting water, and exhausting air in the pipe; step 4, starting the test bed, slowly pressurizing to the detection working pressure, at least reaching the pressure maintaining standard time, observing the welding seam state on the test platform, detecting the wall thickness change of the pipe, and respectively recording the pressure change of the pipeline in the airtight state and the working pressure state; step 5, continuing to slowly pressurize until the test piece is destroyed and failed, and recording the destruction form and the explosion pressure; and 6, completing the examination and verification test, and obtaining a test result according to the test process data.
Description
Technical Field
The invention belongs to the field of new material examination tests, and is suitable for examining new materials of large-size aluminum alloy pipelines of airplanes.
Background
The aircraft models at home and abroad commonly adopt large-specification aluminum alloy welding special-shaped pipeline structures, and are mainly used for pipeline part structures for systems such as environmental control systems, hydraulic systems, fuel oil systems and the like. The welding process, the bending forming process and the like are the most commonly adopted process methods for manufacturing and connecting the welded special-shaped pipeline pieces. The mechanical property, welding property and processing property of the material directly influence the reliability and safety of the pipeline. Therefore, the welded special-shaped pipeline structure adopts a new material, and can be installed and used only by performing relevant calculation, simulation and test examination.
At present, relevant tests and examinations of a large-size aluminum alloy welding special-shaped pipeline installation machine comprise performance tests of welding process performance of materials, forming process performance of the materials, bending process of the materials and the like, and functional verification tests of pressure resistance, blasting and the like of the pipeline, wherein the tests are carried out by adopting a segmented building block type method in the past, namely work of preliminary design, strength calculation analysis, segmented test verification and the like of the pipeline. The sectional test verification mainly comprises a material welding performance test (shown in figure 2), a pressure test and the like, wherein the material welding performance test adopts a function verification test (shown in figure 3) with a welding seam tensile sample, pipeline pressure resistance, blasting and the like, and a single-tube (single-tube structure) compression test and the like are adopted, so that the test workload is large, the test period is long, and the test cost is high. At present, a novel welded pipe examination and verification test is not developed at home and abroad, and a proper pipeline structure and a method thereof required by corresponding function examination and verification are also lacked.
Disclosure of Invention
The purpose of the invention is: the method for checking the novel pipeline material of the airplane is provided, various process performances such as mechanical property, welding property, bending forming property and the like of the pipeline material are fully considered, functional tests such as pipeline airtightness, pressure resistance, blasting and the like are verified, whether the novel material can be used as a low-pressure pipeline material assembling machine is determined, and the blank in the field at home and abroad is filled.
The technical scheme of the invention is as follows:
a method for aircraft novel pipeline material assessment comprises the following steps:
step 3, slowly injecting water, and exhausting air in the pipe;
step 4, starting the test bed, slowly pressurizing to the detection working pressure, at least reaching the pressure maintaining standard time, observing the welding seam state on the test platform, detecting the wall thickness change of the pipe, and respectively recording the pressure change of the pipeline in the airtight state and the working pressure state;
step 5, continuing to slowly pressurize until the test piece is destroyed and failed, and recording the destruction form and the explosion pressure;
and 6, completing the examination and verification test, and obtaining a test result according to the test process data.
A typical pipeline test piece includes: the two half bent pipes 007 and 008 are welded into a whole bent pipe which is arranged in the middle; the four half straight pipes 005 and 009 are welded into a whole straight pipe in pairs, and both ends of the whole bent pipe are welded with a whole straight pipe; the flange 011 is arranged at one end of the whole straight pipe, which is not connected with the whole bent pipe.
A typical pipeline test piece includes 8 welds.
The reliable standard of each joint in the step 2 is that the pressure in the pipeline is not reduced.
The detection working pressure is 3 times of working pressure.
The standard time for pressure maintaining is 3 min.
And 4, slowly pressurizing to 0.02 MPa/min.
Step 3 water was slowly injected at 0.5 m/s.
The invention has the beneficial effects that: the test piece has the advantages of strong structure representativeness, high integrity, high test reliability, short period and low cost.
Description of the drawings:
FIG. 1 is a front view of the novel material assessment of the low-pressure pipeline of the invention.
FIG. 2 is a side view of the novel material assessment of the low pressure pipeline of the present invention.
FIG. 3 is a schematic view of a weld property test piece.
FIG. 4 is a schematic view of a general examination test piece of a new material for a welded pipeline.
The specific implementation mode is as follows:
embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In order to quickly and effectively evaluate whether the novel pipe meets the manufacturing requirements and whether the novel pipe can be used by installing a machine on a low-pressure pipeline of an airplane, the method provided by the invention fully considers the mechanical property, welding property and plastic forming property of the novel material, and the functional performance tests such as airtight pressure resistance, explosion and the like, and can completely check the performance of the novel pipe from the process to the function.
See fig. 1, 2.
The novel pipeline material assessment method is carried out according to the following steps:
according to the drawing 1, the method comprises the following steps,
a typical pipeline test piece includes: the two half bent pipes 007 and 008 are welded into a whole bent pipe which is arranged in the middle; the four half straight pipes 005 and 009 are welded into a whole straight pipe in pairs, and both ends of the whole bent pipe are welded with a whole straight pipe; the flange 011 is arranged at one end of the whole straight pipe, which is not connected with the whole bent pipe. A typical pipeline test piece includes 8 welds.
Step 3, slowly injecting water, and exhausting air in the pipe; the water was slowly injected at 0.5 m/s.
Step 4, starting the test bed, slowly pressurizing to 3 times of working pressure, maintaining the pressure for at least 3min, observing the state of a welding seam on the test platform, detecting the wall thickness change of the pipe, and respectively recording the pressure change of the pipeline in the airtight state and the working pressure state; slowly pressurizing to 0.02 MPa/min.
Step 5, continuing to slowly pressurize until the test piece is destroyed and failed, and recording the destruction form and the explosion pressure;
and 6, completing the examination and verification test, and obtaining a test result according to the test process data.
Claims (8)
1. A method for material assessment of novel pipelines of an aircraft is characterized by comprising the following steps:
step 1, manufacturing a typical pipeline test piece by using the novel material for welding the special-shaped pipeline according to the process specification,
step 2, the pressure pipeline is respectively connected with flange joints (003) at two ends of the typical pipeline structure, and whether each joint is reliable is checked;
step 3, slowly injecting water, and exhausting air in the pipe;
step 4, starting the test bed, slowly pressurizing to the detection working pressure, at least reaching the pressure maintaining standard time, observing the welding seam state on the test platform, detecting the wall thickness change of the pipe, and respectively recording the pressure change of the pipeline in the airtight state and the working pressure state;
step 5, continuing to slowly pressurize until the test piece is destroyed and failed, and recording the destruction form and the explosion pressure;
and 6, completing the examination and verification test, and obtaining a test result according to the test process data.
2. The method for the material assessment of the novel pipeline of the aircraft as claimed in claim 1,
a typical pipeline test piece includes: the two half bent pipes (007 and 008) are welded into a whole bent pipe and arranged in the middle; the four half straight pipes (005 and 009) are welded into a whole straight pipe in pairs, and two ends of the whole bent pipe are welded with a whole straight pipe; and a flange (011) is arranged at one end of the whole straight pipe, which is not connected with the whole bent pipe.
3. The method for the material assessment of the novel pipeline of the aircraft as claimed in claim 2,
a typical pipeline test piece includes 8 welds.
4. The method for the material assessment of the novel pipeline of the aircraft as claimed in claim 1,
the reliable standard of each joint in the step 2 is that the pressure in the pipeline is not reduced.
5. The method for the material assessment of the novel pipeline of the aircraft as claimed in claim 1,
the detection working pressure is 3 times of working pressure.
6. The method for the material assessment of the novel pipeline of the aircraft as claimed in claim 1,
the standard time for pressure maintaining is 3 min.
7. The method for the material assessment of the novel pipeline of the aircraft as claimed in claim 1,
and 4, slowly pressurizing to 0.02 MPa/min.
8. The method for the material assessment of the novel pipeline of the aircraft as claimed in claim 1,
step 3 water was slowly injected at 0.5 m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911379963.6A CN111089685A (en) | 2019-12-27 | 2019-12-27 | Method for checking novel pipeline material of airplane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911379963.6A CN111089685A (en) | 2019-12-27 | 2019-12-27 | Method for checking novel pipeline material of airplane |
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| Publication Number | Publication Date |
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| CN111089685A true CN111089685A (en) | 2020-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911379963.6A Pending CN111089685A (en) | 2019-12-27 | 2019-12-27 | Method for checking novel pipeline material of airplane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033623A (en) * | 2020-09-17 | 2020-12-04 | 济南北兴机械设备有限公司 | An automatic leak detection device for mold water jacket |
| CN115615780A (en) * | 2022-10-24 | 2023-01-17 | 西北工业大学 | A mold box testing method for engine inner runner welds |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6463791B1 (en) * | 1998-02-13 | 2002-10-15 | Guy Berube | Weld testing assembly |
| CN202362121U (en) * | 2011-09-13 | 2012-08-01 | 云南建工第五建设有限公司 | Non-metal pipeline hydraulic pressure leakage inspection device |
| CN105784488A (en) * | 2014-12-15 | 2016-07-20 | 重庆迅升机车配件有限公司 | Method for testing hydraulic pressure of welded pipelines |
| CN108692869A (en) * | 2018-04-18 | 2018-10-23 | 西安飞机工业（集团）有限责任公司 | A kind of conduit air tightness tester and test method |
| CN208333791U (en) * | 2018-07-10 | 2019-01-04 | 黑龙江省中能控制工程股份有限公司 | One kind independently suppressing detection device for heat-exchange unit single-piece pipeline |
| CN209458570U (en) * | 2019-01-04 | 2019-10-01 | 江苏聚缘机械设备有限公司 | A kind of pipe flange detection device |
-
2019
- 2019-12-27 CN CN201911379963.6A patent/CN111089685A/en active Pending
Patent Citations (6)
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|---|---|---|---|---|
| US6463791B1 (en) * | 1998-02-13 | 2002-10-15 | Guy Berube | Weld testing assembly |
| CN202362121U (en) * | 2011-09-13 | 2012-08-01 | 云南建工第五建设有限公司 | Non-metal pipeline hydraulic pressure leakage inspection device |
| CN105784488A (en) * | 2014-12-15 | 2016-07-20 | 重庆迅升机车配件有限公司 | Method for testing hydraulic pressure of welded pipelines |
| CN108692869A (en) * | 2018-04-18 | 2018-10-23 | 西安飞机工业（集团）有限责任公司 | A kind of conduit air tightness tester and test method |
| CN208333791U (en) * | 2018-07-10 | 2019-01-04 | 黑龙江省中能控制工程股份有限公司 | One kind independently suppressing detection device for heat-exchange unit single-piece pipeline |
| CN209458570U (en) * | 2019-01-04 | 2019-10-01 | 江苏聚缘机械设备有限公司 | A kind of pipe flange detection device |
Non-Patent Citations (4)
| Title |
|---|
| L.BERTINI,F.FRENDO,G.MARULO: "Fatigue endurance of welded joints subjected to different blocks of bending and torsion loading", 《PROCEDIA STRUCTURAL INTEGRITY》 * |
| 冯翔 主编: "《建筑装饰施工》", 30 September 2016 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033623A (en) * | 2020-09-17 | 2020-12-04 | 济南北兴机械设备有限公司 | An automatic leak detection device for mold water jacket |
| CN115615780A (en) * | 2022-10-24 | 2023-01-17 | 西北工业大学 | A mold box testing method for engine inner runner welds |
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Application publication date: 20200501 |
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