CN103226012B - Protection and sealing method for strain measurement of underwater composite - Google Patents
Protection and sealing method for strain measurement of underwater composite Download PDFInfo
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- CN103226012B CN103226012B CN201310117609.2A CN201310117609A CN103226012B CN 103226012 B CN103226012 B CN 103226012B CN 201310117609 A CN201310117609 A CN 201310117609A CN 103226012 B CN103226012 B CN 103226012B
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- obturator
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- foil gauge
- material vessel
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Abstract
The invention discloses a protection and sealing method for strain measurement of an underwater composite. The method is characterized in that a strain gage (1) is covered with a damp-proof agent (2), a ceramic closed primer (3) and a sealant (4); a sealing device is in a cylindrical cavity structure formed by a male adapter and a female adapter; a small hole is formed in the end face of a container wall (5) of the to-be-measured composite; a threaded part of the male adapter of the sealing device penetrates through the small hole in the end face of the container wall of the to-be-measured composite, and is screwed down with the female adapter; and a drawing lead wire of the strain gage (1) penetrates through a cavity of the sealing device, so as to penetrate through a container of the to-be-measured composite. The method reduces additional strain of the strain gage under water pressure, reduces zero shift of strain testing, improves the testing precision, and solves the problems that an error of the strain measurement of the high-pressure underwater composite is large and pressure in the container cannot be kept stable.
Description
Technical field
The present invention relates to a kind of protection airtight method of strain measurement, the protection airtight method of particularly a kind of underwater composite strain measurement.
Background technology
In the fields such as chemical industry, oil, Aero-Space, have and much bear highly pressurised liquid, the composite material vessel of gas effect.The intensity of these composite material pressure containers must be very reliable.For the purpose of safety, each pressure vessel, before formal use, all will carry out withstand voltage experiment, and water under high pressure is squeezed in the withstand voltage experiment of safety, economy.Composite material vessel is under the effect of water under high pressure, and the strain measurement of inwall can adopt foil gauge electrical measuring method.The method of the protection silicon rubber covering of present foil gauge and lead-in wire, draw conductor part usually to seal with bonding agent, but due to the electric conductivity of water and the strong perviousness of water under high pressure, make the sticking Quality of part foil gauge, insulating resistance value do not reach test request, and silicon rubber can produce additional strain to foil gauge under hydraulic pressure, have larger zero drift in measuring process, measuring error is larger.The extraction conductor part of foil gauge has water under high pressure and oozes out in addition, makes container inner pressure can not keep stable.
Summary of the invention
The object of the invention is a kind of protection airtight method providing underwater composite strain measurement, solves the large and container inner pressure of high pressure underwater composite strain measurement error and can not keep stable problem.
A kind of concrete steps of protection airtight method of underwater composite strain measurement are:
First step protection foil gauge and extraction wire
After strain gauge adhesion to composite material vessel inwall, select rosin and vaseline mixture as anti-blushing agent, be coated on foil gauge, then brush ceramic airtight priming paint, form waterproof membrane, finally cover fluid sealant.For avoiding affecting measurement effect because of water disturbance under 0 ~ 2MPa pressure and wire insulation defectiveness, extraction wire is all tied up bunchy and is smeared vaseline, then with plastic skin parcel, is then fixed on tested composite material vessel inwall.
Second step installs obturator
Obturator is the cylindrical cavity body structure that male connection and female adapter are formed, tested composite material vessel wall end face opens aperture, in around described aperture, outer container wall is all processed with groove, the embedded rubber washer of groove, tightens with obturator female adapter after the threaded portion of obturator male connection passes the aperture of tested composite material vessel wall end face.The extraction wire of foil gauge is through obturator cavity, thus pass tested composite material vessel, under hydraulic pressure, gap is produced because of contraction in order to prevent the plastic peel of drawing wire, one section is peelled off by drawing wire plastic peel in obturator chamber, extraction wire is peelled off crust section and is put insulation magnetic tube, inject fastening glue in insulation magnetic tube, in last whole obturator chamber, inject fluid sealant.
So far the protection airtight of underwater composite strain measurement is achieved.
Present method solves the large and container inner pressure of high pressure underwater composite strain measurement error and can not keep stable problem, reduce the additional strain that foil gauge causes under pressure, reduce strain testing zero point drift, improve measuring accuracy.
Accompanying drawing explanation
Foil gauge protection schematic diagram in the protection airtight method of a kind of underwater composite strain measurement of Fig. 1;
Go between in the protection airtight method of a kind of underwater composite strain measurement of Fig. 2 closed structure schematic diagram.
1. wire drawn by foil gauge 2. anti-blushing agent 3. ceramic seal coat 4. fluid sealant 5. chamber wall 6. rubber washer 7.
8. insulate magnetic tube 9. obturator.
Embodiment
A kind of concrete steps of protection airtight method of underwater composite strain measurement are:
First step protection foil gauge and extraction wire
After foil gauge 1 pastes composite material vessel inwall, select rosin and vaseline mixture as anti-blushing agent 2, be coated on foil gauge 1, then brush ceramic airtight priming paint 3, form waterproof membrane, finally cover fluid sealant 4.For avoiding affecting measurement effect because of water disturbance under 0 ~ 2MPa pressure and wire insulation defectiveness, extraction wire 7 is all tied up bunchy and is smeared vaseline, then with plastic skin parcel, is then fixed on tested composite material vessel inwall.
Second step installs obturator
Obturator 9 is the cylindrical cavity body structure that male connection and female adapter are formed, tested composite material vessel wall 5 end face opens aperture, in around described aperture, outer container wall is all processed with groove, the embedded rubber washer 6 of groove, tightens with female adapter after the threaded portion of obturator 9 male connection passes the aperture of tested composite material vessel wall end face.The extraction wire 7 of foil gauge 1 is through obturator cavity, thus pass tested composite material vessel, under hydraulic pressure, gap is produced because of contraction in order to prevent the plastic peel of drawing wire 7, one section is peelled off by drawing wire 7 plastic peel in obturator 9 chamber, extraction wire 7 is peelled off crust section and is put insulation magnetic tube 8, inject fastening glue in insulation magnetic tube 8, in last whole obturator chamber, inject fluid sealant 4.
So far the protection airtight of underwater composite strain measurement is achieved.
Claims (1)
1. a protection airtight method for underwater composite strain measurement, is characterized in that the concrete steps of this method are:
First step protection foil gauge and extraction wire
After foil gauge (1) pastes composite material vessel wall, select rosin and vaseline mixture as anti-blushing agent (2), be coated on foil gauge (1), then ceramic airtight priming paint (3) is brushed, form waterproof membrane, finally cover fluid sealant (4); For avoiding affecting measurement effect because of water disturbance under 0 ~ 2MPa pressure and wire insulation defectiveness, extraction wire (7) is all tied up bunchy and is smeared vaseline, then with plastic skin parcel, is then fixed on tested composite material vessel inwall;
Second step installs obturator
The cylindrical cavity body structure that obturator (9) is formed for male connection and female adapter, tested composite material vessel wall (5) end face opens aperture, in around described aperture, outer container wall (5) is all processed with groove, the embedded rubber washer of groove (6), tightens with female adapter after the threaded portion of obturator (9) male connection passes the aperture of tested composite material vessel wall end face; The extraction wire (7) of foil gauge (1) is through obturator cavity, thus pass tested composite material vessel, under hydraulic pressure, gap is produced because of contraction in order to prevent the plastic skin of drawing wire (7), one section is peelled off by drawing wire (7) plastic skin in obturator (9) chamber, extraction wire (7) is peelled off plastic skin section and is put insulation magnetic tube (8), inject fastening glue in insulation magnetic tube (8), in last whole obturator chamber, inject fluid sealant (4);
So far the protection airtight of underwater composite strain measurement is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310117609.2A CN103226012B (en) | 2013-04-07 | 2013-04-07 | Protection and sealing method for strain measurement of underwater composite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310117609.2A CN103226012B (en) | 2013-04-07 | 2013-04-07 | Protection and sealing method for strain measurement of underwater composite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103226012A CN103226012A (en) | 2013-07-31 |
| CN103226012B true CN103226012B (en) | 2015-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310117609.2A Active CN103226012B (en) | 2013-04-07 | 2013-04-07 | Protection and sealing method for strain measurement of underwater composite |
Country Status (1)
| Country | Link |
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| CN (1) | CN103226012B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104743135B (en) * | 2015-03-31 | 2017-05-17 | 中国飞机强度研究所 | Strain gauge protection method |
| CN110873616A (en) * | 2018-08-31 | 2020-03-10 | 梅特勒-托利多(常州)精密仪器有限公司 | Moisture-proof strain gauge and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2728916A1 (en) * | 1977-06-27 | 1979-01-18 | Hottinger Messtechnik Baldwin | METHOD AND DEVICE FOR COVERING A STRAIN GAUGE |
| SU1762114A1 (en) * | 1990-08-21 | 1992-09-15 | Московское научно-производственное объединение "Измеритель" | Method of fastening strain gauge at the unit |
| CN2527999Y (en) * | 2002-03-01 | 2002-12-25 | 天津大学 | Scouring-proof water-proof box for structure stress determination on sea |
| CN201653350U (en) * | 2010-03-30 | 2010-11-24 | 中国船舶重工集团公司第七〇二研究所 | Water-proof sealing structure of strain gauge |
| CN102539036A (en) * | 2010-12-31 | 2012-07-04 | 广西大学 | Welded type underwater stress measuring device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0735628A (en) * | 1993-07-16 | 1995-02-07 | Kyowa Electron Instr Co Ltd | Structure and method for covering strain gate affixed part |
-
2013
- 2013-04-07 CN CN201310117609.2A patent/CN103226012B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2728916A1 (en) * | 1977-06-27 | 1979-01-18 | Hottinger Messtechnik Baldwin | METHOD AND DEVICE FOR COVERING A STRAIN GAUGE |
| SU1762114A1 (en) * | 1990-08-21 | 1992-09-15 | Московское научно-производственное объединение "Измеритель" | Method of fastening strain gauge at the unit |
| CN2527999Y (en) * | 2002-03-01 | 2002-12-25 | 天津大学 | Scouring-proof water-proof box for structure stress determination on sea |
| CN201653350U (en) * | 2010-03-30 | 2010-11-24 | 中国船舶重工集团公司第七〇二研究所 | Water-proof sealing structure of strain gauge |
| CN102539036A (en) * | 2010-12-31 | 2012-07-04 | 广西大学 | Welded type underwater stress measuring device |
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| CN103226012A (en) | 2013-07-31 |
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