CN109100217A - A kind of 4 points of curved test fixtures of anti-H 2 S stress corrosion - Google Patents

A kind of 4 points of curved test fixtures of anti-H 2 S stress corrosion Download PDF

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Publication number
CN109100217A
CN109100217A CN201811122205.1A CN201811122205A CN109100217A CN 109100217 A CN109100217 A CN 109100217A CN 201811122205 A CN201811122205 A CN 201811122205A CN 109100217 A CN109100217 A CN 109100217A
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CN
China
Prior art keywords
fixture
stress corrosion
balance sensor
test
pasted
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811122205.1A
Other languages
Chinese (zh)
Inventor
刘云
任永峰
王涛
赵勇
何石磊
施宜君
李鸿斌
宋红兵
刘新成
焦炜
赵西岐
王岑
王一岑
侯永利
马佼佼
李超
高霞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petroleum and Natural Gas Co Ltd
Baoji Petroleum Steel Pipe Co Ltd
Original Assignee
China Petroleum and Natural Gas Co Ltd
Baoji Petroleum Steel Pipe Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Petroleum and Natural Gas Co Ltd, Baoji Petroleum Steel Pipe Co Ltd filed Critical China Petroleum and Natural Gas Co Ltd
Priority to CN201811122205.1A priority Critical patent/CN109100217A/en
Publication of CN109100217A publication Critical patent/CN109100217A/en
Pending legal-status Critical Current

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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
    • G01N3/02—Details
    • G01N3/04—Chucks
    • 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
    • G01N3/02—Details
    • G01N3/06—Special adaptations of indicating or recording 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
    • G01N2203/0058—Kind of property studied
    • G01N2203/006—Crack, flaws, fracture or rupture
    • G01N2203/0067—Fracture or rupture
    • 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
    • G01N2203/04—Chucks, fixtures, jaws, holders or anvils
    • G01N2203/0458—Chucks, fixtures, jaws, holders or anvils characterised by their material
    • 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
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0688—Time or frequency

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  • 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)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)

Abstract

The invention discloses a kind of 4 points of curved test fixtures of anti-H 2 S stress corrosion, clamp base both sides are provided with the step for placing sample, there are loading blocks in the center upper portion position of two steps, the top of loading blocks is connect by loading screw rod with fixture, the two sides of the fixture are pasted with balance sensor foil gauge, one end of balance sensor foil gauge is pasted on fixture when use, the other end is pasted onto loading blocks, and balance sensor foil gauge is connect by signal wire with the digital recording equipment for recording test data.Sample is broken during test, and imbalance state occur in loading blocks, is transferred to digital recording equipment by balance sensor foil gauge, is realized the accurate recording sample out-of-service time, improves reliably foundation for preferably research H 2 S stress corrosion.

Description

A kind of 4 points of curved test fixtures of anti-H 2 S stress corrosion
Technical field:
The present invention relates to a kind of H 2 S stress corrosion devices, and in particular to a kind of 4 points of curved examinations of anti-H 2 S stress corrosion Test fixture.
Background technique:
H 2 S stress corrosion is in tensile stress, H2The cracking occurred under the comprehensive function of S and water, H 2 S stress corrosion Failure have the characteristics that it is sudden, no-delay and without omen, be to destruction caused by oil-gas pipe material safe operation it is fatal, because During this sulfide stress corrosion cracking test, it is vital for grasping the fracture failure time.
4 flexure stress corrosion tests of hydrogen sulfide be by one group of loads fixture and sample and meanwhile be soaked in corrosive medium into Row test, test chamber cannot be opened halfway during test, thus sample occur the fracture failure time can not accurate recording, from And cause the inaccuracy of test result.To the anti-H 2 S stress corrosion performance of different oil-gas pipe materials can not across comparison, from And the height of its anti-stress corrosion performance can not be measured.
Application No. is CN201310093143.7, disclose a kind of anti-H 2 S stress corrosion cracking bend test device, Including rectangular housing, the bottom of rectangular housing is placed with sample mount, and the upper end of rectangular housing is fixed with cover board, and cover board and square The test chamber that seal washer forms a sealing is provided between shape shell；Sample mount rectangular frame structure and its front and back End has symmetrical groove, embeddable sample bending fixture in the groove, and two diagonal angles of the cover board are fitted with air inlet pipe And exhaust pipe, sample bending fixture curved, 3 points of curved or 4 kinking structures for two o'clock.Although the device can detecte evaluation and accurate Analyze the anti-H 2 S stress corrosion cracking ability of tubing, plate or equipment, but can't the failure of accurate recording sample it is disconnected Split the time.
Therefore, it is necessary to carry out adaptive improvement to 4 flexure stress corrosion test fixtures of existing hydrogen sulfide, trying it The accurate recording sample failure fracture time during testing is that the evaluation oil-gas pipe material stress corrosion resistant of more preferable, more acurrate property is tested Performance provides reliable basis.
Summary of the invention:
To overcome the above disadvantages, the purpose of the present invention is to provide a kind of 4 points of curved test clamps of anti-H 2 S stress corrosion Tool, the fixture can accurately grasp test during sample fail the case where.
The purpose of the present invention is by the following technical programs to solve: a kind of 4 points of curved tests of anti-H 2 S stress corrosion Fixture, clamp base both sides are provided with the step for placing sample, and there are loading blocks in the center upper portion position of two steps, load The top of block is connect by loading screw rod with fixture, and the two sides of the fixture are pasted with balance sensor foil gauge, when use One end of balance sensor foil gauge is pasted on fixture, and the other end is pasted onto loading blocks, and balance sensor foil gauge passes through Signal wire is connect with the digital recording equipment for recording test data.
Beneficial effects of the present invention:
(1) sample is broken during test, and imbalance state occur in loading blocks of the present invention, is answered by balance sensor Become piece and be transferred to digital recording equipment, realize the accurate recording sample out-of-service time, is mentioned for preferably research H 2 S stress corrosion Highly reliably foundation.
(2) 4 flexure stress corrosion test fixtures of anti-H 2 S of the present invention and loading blocks are Hastelloy, balance sensing Device foil gauge is the good silver strip of corrosion resistance, effectively improves its service life.
Detailed description of the invention:
Fig. 1 is 4 points of anti-H 2 S stress corrosion curved test fixture schematic diagrames of the present invention.
Fig. 2 is the installation diagram of 4 points of curved test fixtures of anti-H 2 S stress corrosion of the present invention.
Description of symbols: 1 fixture, 1-1 step, 2 loading blocks, 3 load screw rods, 4 balance sensor foil gauges, 5 signals Line, 6 samples, 7 test buckets, 8 sealing covers, 9 air inlet pipe, 10 exhaust pipes.
Specific embodiment:
The invention will be described in further detail with reference to the accompanying drawing:
As depicted in figs. 1 and 2, a kind of 4 points of curved test fixtures of anti-H 2 S stress corrosion, 1 bottom both sides of fixture are provided with For placing the step 1-1 of sample 6, there are loading blocks 2 in the center upper portion position of two step 1-1, and the top of loading blocks 2 is by adding It carries screw rod 3 to connect with fixture 1, the two sides of the fixture 1 are pasted with balance sensor foil gauge 4, balance sensor when use One end of foil gauge 4 is pasted on fixture 1, and the other end is pasted onto loading blocks 2, and balance sensor foil gauge 4 passes through signal wire 5 It is connect with the digital recording equipment for recording test data.
Before test, sample 6 is placed on the upper of two step 1-1 first, load is applied to sample 6 by load screw rod 3； Secondly after the completion of loading, balance sensor foil gauge 4 is sticked respectively in the two sides of fixture 1, by the one of balance sensor foil gauge 4 End is pasted on fixture 1, and the other end is pasted onto loading blocks 2；Last 4 connection signal line 5 of balance sensor foil gauge, and will be upper It states all components to place in test bucket 7, testing liquid is added and is tested.
The top of test bucket 7 of the invention is sealing cover 8, is equipped with air inlet pipe 9 and exhaust pipe 10, signal on sealing cover 8 Line 5 passes through sealing cover 8 and connect with digital recording equipment.When experiment, ventilated by air inlet pipe 9 to test bucket 7, exhaust pipe 10 is discharged Gas records test period by digital recording equipment, and fracture failure once occurs in sample 6 in experimentation, and loading blocks 2 occur Imbalance state, signal is reached digital recording equipment, digital recording equipment by signal wire 5 by balance sensor foil gauge 4 at this time Record unstability time, as sample out-of-service time.
In order to facilitate observation experiment situation, it is transparent organic glass that the present invention, which tests bucket 7,.
Present clip 1 and loading blocks 2 are Hastelloy, and the material of balance sensor foil gauge 4 and signal wire 5 is resistance to The good fine silver of corrosion.

Claims (2)

1.一种抗硫化氢应力腐蚀四点弯试验夹具，其特征在于：夹具(1)底部两边设置有用于放置试样(6)的台阶(1-1)，两个台阶(1-1)的上部中央位置有加载块(2)，加载块(2)的顶部通过加载螺杆(3)与夹具(1)连接，所述夹具(1)的两侧均粘贴有平衡传感器应变片(4)，使用时平衡传感器应变片(4)的一端粘贴在夹具(1)上，另一端粘贴在加载块(2)上，平衡传感器应变片(4)通过信号线(5)与用于记录试验数据的数字记录设备连接。1. An anti-hydrogen sulfide stress corrosion four-point bending test fixture is characterized in that: both sides of the bottom of the fixture (1) are provided with steps (1-1) for placing the sample (6), two steps (1-1) There is a loading block (2) at the center of the upper part, and the top of the loading block (2) is connected to the fixture (1) through a loading screw (3), and balance sensor strain gauges (4) are pasted on both sides of the fixture (1) When in use, one end of the balance sensor strain gauge (4) is pasted on the fixture (1), and the other end is pasted on the loading block (2). The balance sensor strain gauge (4) is used to record the test data through the signal line (5) digital recording device connection. 2.根据权利要求1所述的一种抗硫化氢应力腐蚀四点弯试验夹具，其特征在于：抗硫化氢应力腐蚀四点弯试验夹具放置在试验桶(7)中，所述试验桶(7)的上部为密封盖(8)，密封盖(8)上安装有进气管(9)和排气管(10)，信号线(5)穿过密封盖(8)与数字记录设备连接。2. a kind of anti-hydrogen sulfide stress corrosion four-point bending test fixture according to claim 1 is characterized in that: the anti-hydrogen sulfide stress corrosion four-point bending test fixture is placed in the test barrel (7), and the test barrel ( 7) The top is a sealing cover (8), on which an air intake pipe (9) and an exhaust pipe (10) are installed, and the signal wire (5) passes through the sealing cover (8) and is connected with a digital recording device.
CN201811122205.1A 2018-09-26 2018-09-26 A kind of 4 points of curved test fixtures of anti-H 2 S stress corrosion Pending CN109100217A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110231218A (en) * 2019-07-26 2019-09-13 西南石油大学 The constant strain stress corrosion testing device and its test method of a kind of analog scene corrosive environment
CN115032054A (en) * 2022-05-31 2022-09-09 中国船舶重工集团公司第七二五研究所 Temperature-controlled stress corrosion electrolytic cell and use method thereof

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58122445A (en) * 1982-01-14 1983-07-21 Toshiba Corp Testing method of stress corrosion cracking
SU1200162A1 (en) * 1984-06-12 1985-12-23 Институт Проблем Прочности Ан Усср Arrangement for specimen clamping at tensile testing
JPS63101711A (en) * 1986-10-18 1988-05-06 Shigeki Yamazaki Attitude sensor
CN202351128U (en) * 2011-11-11 2012-07-25 中国石油大学(北京) Stress clamp for hydrogen sulfide environmental stress corrosion bending test
CN203299062U (en) * 2013-06-18 2013-11-20 中国海洋石油总公司 Four-point bending test device for full-size metal composite tube
CN103926146A (en) * 2014-04-11 2014-07-16 西南石油大学 Constant-load stress corrosion testing device of small test sample and testing method thereof
CN104483187A (en) * 2014-12-31 2015-04-01 大连理工大学 A mechanical performance test device that can realize different proportions of tensile and bending combined loading
CN106198198A (en) * 2016-07-01 2016-12-07 西南石油大学 A kind of four-point bending sample holding device for stress corrosion and loading method
CN107607394A (en) * 2017-10-16 2018-01-19 武汉钢铁有限公司 4 angle couplings tool and its loading method for the loading of thin plate high stress
CN108553263A (en) * 2017-12-13 2018-09-21 深圳市罗伯医疗科技有限公司 A kind of fluid power assistant robot and its control method

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58122445A (en) * 1982-01-14 1983-07-21 Toshiba Corp Testing method of stress corrosion cracking
SU1200162A1 (en) * 1984-06-12 1985-12-23 Институт Проблем Прочности Ан Усср Arrangement for specimen clamping at tensile testing
JPS63101711A (en) * 1986-10-18 1988-05-06 Shigeki Yamazaki Attitude sensor
CN202351128U (en) * 2011-11-11 2012-07-25 中国石油大学(北京) Stress clamp for hydrogen sulfide environmental stress corrosion bending test
CN203299062U (en) * 2013-06-18 2013-11-20 中国海洋石油总公司 Four-point bending test device for full-size metal composite tube
CN103926146A (en) * 2014-04-11 2014-07-16 西南石油大学 Constant-load stress corrosion testing device of small test sample and testing method thereof
CN104483187A (en) * 2014-12-31 2015-04-01 大连理工大学 A mechanical performance test device that can realize different proportions of tensile and bending combined loading
CN106198198A (en) * 2016-07-01 2016-12-07 西南石油大学 A kind of four-point bending sample holding device for stress corrosion and loading method
CN107607394A (en) * 2017-10-16 2018-01-19 武汉钢铁有限公司 4 angle couplings tool and its loading method for the loading of thin plate high stress
CN108553263A (en) * 2017-12-13 2018-09-21 深圳市罗伯医疗科技有限公司 A kind of fluid power assistant robot and its control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110231218A (en) * 2019-07-26 2019-09-13 西南石油大学 The constant strain stress corrosion testing device and its test method of a kind of analog scene corrosive environment
CN115032054A (en) * 2022-05-31 2022-09-09 中国船舶重工集团公司第七二五研究所 Temperature-controlled stress corrosion electrolytic cell and use method thereof

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Country or region after: China

Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen

Applicant after: CHINA NATIONAL PETROLEUM Corp.

Applicant after: China Petroleum Group Gemstone Pipe Industry Co.,Ltd.

Address before: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen

Applicant before: CHINA NATIONAL PETROLEUM Corp.

Country or region before: China

Applicant before: BAOJI PETROLEUM STEEL PIPE Co.,Ltd.

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Application publication date: 20181228

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