CN202471545U - Weld deposited metal diffusible hydrogen tester - Google Patents
Weld deposited metal diffusible hydrogen tester Download PDFInfo
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- CN202471545U CN202471545U CN 201220115440 CN201220115440U CN202471545U CN 202471545 U CN202471545 U CN 202471545U CN 201220115440 CN201220115440 CN 201220115440 CN 201220115440 U CN201220115440 U CN 201220115440U CN 202471545 U CN202471545 U CN 202471545U
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- liquid level
- diffusible hydrogen
- weld
- test
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Abstract
The utility model discloses an accuracy-adjustable weld deposited metal diffusible hydrogen tester, which comprises a closed gas collection cylinder and a liquid level display tube, wherein the liquid level display tube is communicated with the closed gas collection cylinder; the closed gas collection cylinder consists of a collector cylinder body, a base and a top cover; a sealing rubber ring is arranged at the inner periphery of the top cover; the inner part of the top cover is in quick threaded connection with the outer edge of a sealing surface of the collector cylinder body; a transverse tube is arranged on the collector cylinder body; and the liquid level display tube is connected with the closed gas collection cylinder through the transverse tube. During test, a metal welding test piece is placed in the closed gas collection cylinder for accommodating glycerol; when diffusible hydrogen is diffused from a weld of the test piece to generate corresponding volume gas, the volume gas presses liquid glycerol to flow, and correspondingly, the liquid level of the glycerol in the liquid level display tube rises up to form new liquid level; and the volume reading of gas which is collected can be obtained by corresponding liquid level difference calculation. The weld deposited metal diffusible hydrogen tester is convenient to carry and applicable to test in a construction site. The liquid level display tube of the weld deposited metal diffusible hydrogen tester can be replaced, display accuracy can be converted, and the weld deposited metal diffusible hydrogen tester is applicable to test of the gas with different hydrogen content.
Description
Technical field
The utility model belongs to metal welding seam diffusible hydrogen content measuring technology, and the weld(ing) deposit diffusible hydrogen that is specifically related to a kind of adjustable precision is collected and proving installation.
Background technology
Arc welding is a kind of common metal solder method, and in the arc heated process, high-temperature electric arc is hydrogen atom or proton with the material heating and decomposition that contains protium in the welding material.At high temperature, hydrogen atom or proton will be dissolved in the metal pool and be trapped in the liquid metal.Carrying out along with the postwelding cooling procedure; Most of dissolved hydrogen will be because of the solubleness effusion weld seam that descends; But still have part can remain in the solid-state weld metal, form pore or cause weld seam and heat-affected zone generation cold crack, become the maximum unfavorable factor that influences quality of weld joint.Particularly for the alloy high-strength steel, hydrogen causes and postpones the biggest problem that cold crack is welding.Therefore, want the existence of the hydrogeneous elemental substance in strict control welding material and the environment before welding or in the welding process.For SMAW and submerged arc welding, the approach that causes weld seam to increase hydrogen mainly contains three aspects, welding material, welding work pieces situation and ambient humidity.Measure is eliminated before generally can taking to weld for workpiece state and ambient humidity.Though welding material also can reduce through the way of heating, drying before welding, be difficult to thoroughly eliminate, particularly more strict to the requirement of low hydrogen type or ultralow hydrogen type welding material.For this reason, need weld deposit metal diffusible hydrogen amount test and evaluation to welding material.
The test of diffusible hydrogen, current correlation standard both domestic and external three kinds of different method of testings, be respectively: 45 ℃ of glycerine methods of testing, mercury process method of testing and gas chromatography method of testing etc.45 ℃ of glycerine methods of testing are current domestic method of testings of generally using, have simple to operate, test process safety, advantage such as intuitive is good.But in low hydrogen or the test of ultralow hydrogen type welding material; Because glycerine viscosity is bigger; Add that the diffusible hydrogen amount is considerably less, the bubble hydrogen of minute quantity is arranged or, influenced the gathering of gas and reduced measuring accuracy because of being trapped in test specimen surface or being present in the glycerol liquids and can not pooling together.To the low shortcoming of glycerine method measuring accuracy of GB regulation, University Of Tianjin has developed a kind of glycerine fluid-discharge therapy diffusible hydrogen gathering-device once at the early eighties in last century.According to the document introduction, the measuring accuracy of this method can compare favourably with mercury process.Mercury process test is big because of mercury density, and bubble hydrogen can gather together fully and measuring accuracy is very high, is specially adapted to the test of low hydrogen or ultralow hydrogen type.But, the toxicity of mercury with cost an arm and a leg and the complicacy of equipment, limit the generally use of this method, particularly be limited to use because of the mercury environmental issue in Europe.Though vapor-phase chromatography measuring accuracy and mercury process are suitable, still,, do not have the test condition of working-yard because of apparatus expensive and bulky uses not too conveniently.
Survey hydrogen methods for above-mentioned three kinds, for the cleaning of test specimen postwelding and go into the appearance time strict restriction is arranged,, require to accomplish at 90 seconds like the GB/T3965-1995 regulation.Three kinds of methods have also been carried out strict regulations to probe temperature in test process.And in the diffusible hydrogen collection process, the discharge of above-mentioned all methods all can not move, so all diffusible hydrogens tests can only carry out in the laboratory, and it is on-the-spot to be applied to welding.Aforementioned in addition three kinds of proving installations all have only a measuring accuracy, can not carry out measuring accuracy according to tested weld(ing) deposit diffusible hydrogen amount and regulate.
Summary of the invention
The purpose of the utility model provides a kind of weld(ing) deposit diffusible hydrogen tester, and this equipment is easy to carry, and is fit to the working-yard and uses; And can adjust display precision, be fit to multiple range usable range.
Weld(ing) deposit diffusible hydrogen tester comprises airtight gas collecting jar with ground-on cover plate and the liquid level charactron that is communicated with airtight gas collecting jar with ground-on cover plate.Airtight gas collecting jar with ground-on cover plate is to be made up of gatherer cylindrical shell, base and top cover, and there is O-ring seal all inboards of top cover, and inboard the employing with gatherer cylindrical shell sealing surface outer of top cover is threaded fast; A transverse tube is arranged on the gatherer cylindrical shell, and liquid level charactron is connected with airtight gas collecting jar with ground-on cover plate through this transverse tube.
The test philosophy of equipment is the flow principles of liquid in linker.During test the metal solder test specimen is placed in the airtight gas collecting jar with ground-on cover plate that fills glycerine;, diffusible hydrogen produces respective volume after diffusing out from the test specimen weld seam; This volumes of gas compressing liquid glycerine forms mobile, and correspondingly the glycerine liquid level in the liquid level charactron rises thereupon and forms new liquid level.Can obtain the gas volume reading of collecting through corresponding liquid level difference calculating.The utility model is easy to carry, and is adapted at the working-yard test and uses, and its liquid level charactron can be replaced, and convertible display precision is suitable for the test of different hydro content gas.
Description of drawings
Accompanying drawing is the structural representation of the utility model.
Embodiment
The airtight gas collecting jar with ground-on cover plate of the utility model is made up of gatherer cylindrical shell 1, gatherer cylindrical shell sealing surface 2, gatherer top cover 3, sealing rubber ring 4 and connection transverse tube 5, and main effect is splendid attire glycerine 13 and welding piece 14 and collects by the hydrogen that diffuses out in the weld seam 15.Require glycerine 13 liquid levels in the airtight gas collecting jar with ground-on cover plate will flood connection transverse tube 5 at least.Airtight gas collecting jar with ground-on cover plate size can be chosen for φ 40 * 150mm according to the sample dimensions length of standard GB/T3965-1995 regulation.Can adopt two kinds of material, organic glass or metals.Adopt the organic glass pipe manufacturer can observe diffusible hydrogen effusion process from weld seam easily, have good visuality, be very suitable for experimental teaching or scientific research.When adopting metal tube to make, one-piece construction has certain intensity, and durability is strong, applicable to the welding on-the-spot test.
On top cover 3, have liquid level to return zero valve 6, the glycerine liquid level initial value during with the assurance test in the liquid level charactron 8 is a definite value, is convenient to test.Connect transverse tube 5 and can use the respective material processing and manufacturing according to gatherer tube material different mining; When cylindrical shell is plexi-glass tubular; Can adopt organic glass or nylon rod material; Correspondingly connect 1 in transverse tube 5 and gatherer tube and adopt plug in construction, through bonding the getting final product of 302 glue (modified acroleic acid fat tackifier).When cylindrical shell is metal, connects transverse tube 5 and can adopt metal tube, can be welded on gatherer cylindrical shell 1 one sides.Gatherer cylindrical shell sealing surface 2 can adopt identical material with gatherer top cover 3, like nylon or metal.When selecting nylon for use, gatherer tube sealing surface 2 can adopt 302 glue bonds with being connected of gatherer cylindrical shell 1; When selecting metal for use, gatherer cylindrical shell sealing surface 2 can adopt the TIG welding with gatherer cylindrical shell 1 (cylindrical shell also is metal), or adopts 302 glue bonds (cylindrical shell is a plexi-glass tubular).The quick screw thread of fit on is realized in adopting between gatherer top cover 3 and the gatherer tube sealing surface 2, can adopt sealing rubber ring 4 in the sealing of 2 of gatherer top cover 3 and gatherer cylindrical shell sealing surfaces.But connect the middle part of transverse tube 5 side joints at gatherer tube 1.In transverse tube 5 outer ends transition section 9 is arranged, liquid level charactron 8 lower ends are connected with transition section 9 on the airtight gas collecting jar with ground-on cover plate transverse tube 5 through screw thread.Transition section 9 can adopt on-disconnectable connected mode with being connected of 5 of transverse tubes, and when transverse tube was metal, transition section 9 also adopted metal, need weld between the two; When transverse tube 5 for organic glass was, transition section 9 optional nylon materials adopted 302 gluing connecing to get final product between the two.On transition section 9, need to install the pipe adapter 10 that a metal is made, pipe adapter 10 adopts 302 glue bonds with display tube 8.And pipe adapter 10 is threaded with transition section 9 employings.
At first check the sealing at each position of discharge.Specific as follows: as to contain a basin water, test macro is put into water, make the liquid level charactron port expose the water in basin liquid level, utilize ear washing bulb inwardly to inflate, observe each one of discharge and whether leak gas through liquid level charactron 8 ports.When confirming the no bubble effusion water surface, think good seal.
Behind each position good seal of inspection natural gas gathering system.Unload outlet manifold top cover 3, glycerine is filled in the gatherer tube, the glycerin liquid distance of positions leaves about middle side joint transverse tube 5 about 5mm, and zero valve 6 that returns on the top cover 3 is opened.
Require to test welding material and preliminary works such as test specimen is dried, oil removing rust according to standard GB/T3965-1995 to institute; To put into the gatherer tube fast by the welded specimen that standard program is handled; And the top cover 3 of screwing on fast, to guarantee when tightening that O-ring seal 4 can excellent sealing.The discharge tester is placed into tightens back zero valve behind the test box, observe the liquid level initial position simultaneously and carry out record.After 72 hours hydrogen diffusion, the glycerine liquid level in the liquid level charactron 8 will reach a certain height, and observe and record liquid level position.For each liquid level charactron, the volume of twice liquid level difference generation is exactly a deposit metal diffusible hydrogen amount.The standard diffusible hydrogen content can be according to the per 100 gram deposited weld metal equivalent hydrogen contents under the computes status of criterion.
In the formula: r is the liquid level charactron radius;
H
0Be the liquid level initial position;
H is liquid level position, test back;
G
0Be quality before the test specimen welding;
G
1Be test specimen postwelding quality;
P is the experimental enviroment atmospheric pressure;
P
0Be standard atmospheric pressure;
T
0Be 0 ℃ of standard temperature (273.15K);
T
1Be the test environment temperature.
11 effects of liquid level charactron protective sleeve are to guarantee that the gas collection tester prevents to damage the protective device that liquid level charactron is provided with because of toppling in the carrying moving process, and it is connected with pipe adapter 10 through screw thread, in the test reading process, need unload.
Claims (5)
1. weld(ing) deposit diffusible hydrogen tester; Comprise airtight gas collecting jar with ground-on cover plate and the liquid level charactron that is communicated with airtight gas collecting jar with ground-on cover plate; It is characterized in that: airtight gas collecting jar with ground-on cover plate is to be made up of gatherer cylindrical shell (1), base (7) and top cover (3); There is O-ring seal one all inboards of top cover (3), and inboard the employing with gatherer cylindrical shell sealing surface (2) outer of top cover (3) is threaded fast; A transverse tube (5) is arranged on gatherer cylindrical shell (1), and liquid level charactron (8) is connected with airtight gas collecting jar with ground-on cover plate (1) through this transverse tube (5).
2. weld(ing) deposit according to claim 1 diffusible hydrogen tester is characterized in that: in transverse tube (5) outer end transition section (9) is arranged, liquid level charactron (8) lower end is connected with transition section (9) on the airtight gas collecting jar with ground-on cover plate transverse tube (5) through screw thread.
3. weld(ing) deposit according to claim 1 diffusible hydrogen tester is characterized in that: on top cover (3), have liquid level to return zero valve (6).
4. weld(ing) deposit according to claim 1 and 2 diffusible hydrogen tester is characterized in that: graduated scale (12) is arranged on liquid level charactron (8).
5. weld(ing) deposit according to claim 4 diffusible hydrogen tester is characterized in that: liquid level charactron (8) is a plexi-glass tubular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220115440 CN202471545U (en) | 2012-03-23 | 2012-03-23 | Weld deposited metal diffusible hydrogen tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220115440 CN202471545U (en) | 2012-03-23 | 2012-03-23 | Weld deposited metal diffusible hydrogen tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202471545U true CN202471545U (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220115440 Expired - Fee Related CN202471545U (en) | 2012-03-23 | 2012-03-23 | Weld deposited metal diffusible hydrogen tester |
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| CN (1) | CN202471545U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808467A (en) * | 2013-10-30 | 2014-05-21 | 杭州汽轮机股份有限公司 | Turbine mechanical fly ball laser sealing welding seam inspection method |
| CN111721663A (en) * | 2019-03-21 | 2020-09-29 | 宝山钢铁股份有限公司 | Method for evaluating fish scaling performance of steel for enamel |
| CN112986523A (en) * | 2021-03-08 | 2021-06-18 | 辽宁石油化工大学 | Method for displaying existence of diffusible hydrogen in welding seam on production site |
-
2012
- 2012-03-23 CN CN 201220115440 patent/CN202471545U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808467A (en) * | 2013-10-30 | 2014-05-21 | 杭州汽轮机股份有限公司 | Turbine mechanical fly ball laser sealing welding seam inspection method |
| CN111721663A (en) * | 2019-03-21 | 2020-09-29 | 宝山钢铁股份有限公司 | Method for evaluating fish scaling performance of steel for enamel |
| CN112986523A (en) * | 2021-03-08 | 2021-06-18 | 辽宁石油化工大学 | Method for displaying existence of diffusible hydrogen in welding seam on production site |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20130323 |