CN201811912U - Medical magnesium alloy biodegradation performance integrated gas collecting and measuring device - Google Patents
Medical magnesium alloy biodegradation performance integrated gas collecting and measuring device Download PDFInfo
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- CN201811912U CN201811912U CN2010205082931U CN201020508293U CN201811912U CN 201811912 U CN201811912 U CN 201811912U CN 2010205082931 U CN2010205082931 U CN 2010205082931U CN 201020508293 U CN201020508293 U CN 201020508293U CN 201811912 U CN201811912 U CN 201811912U
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Abstract
The utility model discloses a medical magnesium alloy biodegradation performance integrated gas collecting and measuring device which comprises a gas burette, a gas guide hood, a cock valve and a drainage tube, wherein the wall of the gas burette is respectively provided with volume scales and length scales and the wall in scale areas is transparent; the gas guide hood is a hollow circular cone with two open ends; and one end of the gas burette is connected with the drainage tube through the cock valve and the other end of the gas burette is connected with the small open end of the gas guide hood. The device has the advantages of compact structure, accurate measurement, convenience in use, high universality and the like. By using the device, the real-time collection and synchronous accurate measurement of insoluble gas produced in specific areas in liquid medium can be realized easily, and thereby the requirements of rapid material corrosion and degradation performance and accurate measurement can be satisfied. The device is particularly suitable for hydrogen evolution measurement of biodegradation performance of biodegradable medical metallic materials/apparatuses such as magnesium alloy and medical apparatuses made of magnesium alloy.
Description
Technical field
The utility model belongs to material/apparatus technical field of performance test, and the insoluble gas that relates to specific region generation in a kind of liquid towards medium carries out the device of real-time collecting and synchronous accurate quantification with discharge opeing gas collection principle.
Background technology
Discharge opeing gas collection principle is widely utilized in scientific research and experimental teaching.Wherein, the liberation of hydrogen mensuration that is used for magnesium alloy corrosion protection such as biodegradability evaluation is exactly a typical case.When degraded took place in aqueous medium such as seawater, simulated body fluid etc. magnesium alloy, cathodic depolarization reacted based on evolving hydrogen reaction, and the overall reaction equation is as follows:
If the intermediate steps that may relate to is not considered, above-mentioned overall reaction can be decomposed as follows:
Anodic solution: M → M
N++ ne
-(2)
Cathode hydrogen evolution: 2H
2O+2e
-→ H
2+ 2OH
-(3)
Subsidiary reaction: M
N++ nOH
-→ M (OH)
n(4)
Wherein, M represents the main alloy element in Mg or the magnesium alloy in the formula of (1)-(4).
Electrochemical principle in view of the above is by collecting insoluble gas---the hydrogen (H that degraded produces
2) and its volume carried out quantitatively, and then utilizing the equation of gas state to calculate its amount of substance, association reaction equation (1) can be known anodic solution (corrosion degraded) information of magnesium alloy as calculated afterwards.Therefore, as a kind of gas volumetric method, the liberation of hydrogen mensuration is in magnesium alloy corrosion Study on degradation especially 1) catabolite is difficult to thorough removing, or 2) non-homogeneous degraded, or 3) have special value in the dynamics research that requires based on a large amount of real time datas.In liberation of hydrogen is measured, the collection of hydrogen, be that core is crucial quantitatively.Existing liberation of hydrogen mensuration equipment therefor comprises independently funnel and eudiometer tube (as buret), main operational steps is as follows: sample is put into the container (as beaker) that fills solution, back-off one funnel on the container, the funnel tail end is back-off one eudiometer tube again, funnel and eudiometer tube are filled solution before the experiment beginning, the hydrogen that sample produces is replaced solution wherein by funnel inlet tracheae, thereby realize the collection of gas, the gas flow throughput tracheae scale of collecting obtains.Said apparatus and method seem simply, but have following main drawback during practical operation:
1) for the gas that guarantees to be filled in funnel and the eudiometer tube solution and collect by funnel finally can the inlet tracheae so that metering, funnel osculum end must be positioned at eudiometer tube and the eudiometer tube mouth of pipe must be positioned at below the liquid level, causes the funnel position to be difficult to control because of clamping inconvenience thus.Unless rely on special-purpose bracing or strutting arrangement, otherwise can only falling within container bottom, funnel forms relative closed space with container, cause: A. influence the mass exchange of the inside and outside solution of funnel, and finally influences the The performance test results that is subjected to the sample that funnel shrouds; Thereby B. control its effective working area, easily cause the failure of an experiment during accidents such as therefore inclining, fall at sample owing to be difficult to adjust in real time wherein the pose of sample.
2) because eudiometer tube and funnel to the shutoff of sample upper space, can't adopt conventional simple " suspension type " load sample method to carry out sample and load, therefore cause series inconvenience, even influence experimental result.
3) owing to limit by funnel and eudiometer tube shape and specification, gas collection amount and measuring accuracy are restricted simultaneously.
4), cause managing measurement interior, the outer liquid level difference of pipe and have inconvenience because the convention amount tracheae does not have the length scale.
Summary of the invention
The purpose of this utility model is exactly the deficiency at existing method and device, a kind of compact conformation is provided, measures the integrated gas collection measurement mechanism of medical magnesium alloy biodegradability accurate, easy to use, highly versatile.
Above-mentioned purpose of the present utility model is achieved through the following technical solutions: the integrated gas collection measurement mechanism of a kind of medical magnesium alloy biodegradability, comprise eudiometer tube, air scoop, stopcock and drainage tube, wherein the eudiometer tube tube wall is with capacity scale and length scale respectively, and the scale area tube wall is transparent; Air scoop is the cone of hollow and open at both ends; One end of eudiometer tube links to each other with drainage tube by stopcock, and the other end links to each other with the little opening end of air scoop.
Wall thickness is identical everywhere for described air scoop cover body, and its inner chamber is provided with the sample hook.
Described sample hook integral body is " L " type, one end is fixedlyed connected with air scoop cover body inwall, other end perk, horizontal segment have the extension sample platform or " V " font in " one " font band tooth or band hole to hang the sample groove, and the central point of extension sample platform or extension sample groove is positioned on the axis of eudiometer tube.
Described drainage tube is a hollow ring pipe, and its free end is an open type.
Described eudiometer tube, air scoop, stopcock and drainage tube are integrated.
Compare with prior art and equipment, outstanding effect of the present utility model is:
1) gas volume can directly obtain by liquid level change in the pipe in the eudiometer tube, and range, precision and sensitivity etc. all can be selected to control flexibly by caliber, is convenient to satisfy needing of trace or a large amount of gas reaction of formation application.
2) but in the eudiometer tube pipe, the length scale of pipe on the outer liquid level difference throughput tracheae tube wall directly obtain, be convenient to gas actual pressure in the pipe is accurately calculated.
3) the smooth filling of fluid media (medium) in preceding eudiometer tube of gas collection test beginning and the air scoop is convenient in the supporting design of drainage tube and stopcock.
4) geometrical construction of air scoop can guarantee that the insoluble gas product of separating out finally can be pooled in the eudiometer tube smoothly, has avoided the delay at other position; In addition, effective overlay area of air scoop can be by controlling the selection of its big opening end internal diameter flexibly, be convenient to adjust according to the physical size of test specimen effective collecting zone of insoluble gas product, the generation of the phenomenon of can avoiding becoming flat.
5) sample of apparatus integration structural design and special construction hook is very easy to the installation, fixing of device integral body and test specimen.This device has versatility for gas collection method test material corrosion degradation property, is particularly suitable for degradable medical metal material/apparatus such as medical magnesium alloy and medical device product biodegradability thereof prison, detection in real time and accurately.
Description of drawings
Fig. 1 is the structural representation of the present utility model of carry sample hook.
Fig. 2 is the structural representation that " one " font is hung the sample platform.
Fig. 3 is the structural representation that band hole " " font is hung the sample platform.
Fig. 4, Fig. 5, Fig. 6 are three kinds of structural representations that band tooth " " font is hung the sample platform.
Fig. 7 is the structural representation that band tooth " V " font is hung the sample groove.
Fig. 8 is an application implementation synoptic diagram of the present utility model.
Among the figure: 1-eudiometer tube, 2-air scoop, 3-sample hook, 4-stopcock, 5-drainage tube, 6-containing mark, 7-length scale, 8-test container, 9-specimen.
Embodiment
Below in conjunction with accompanying drawing concrete enforcement of the present utility model is described further, but enforcement of the present utility model and protection domain are not limited thereto.
As shown in Figure 1, the integrated gas collection measurement mechanism of medical magnesium alloy biodegradability is made up of incorporate eudiometer tube 1, air scoop 2, stopcock 4 and drainage tube 5.Wherein eudiometer tube 1 tube wall is with containing mark 6 and length scale 7 respectively, and the scale area tube wall is transparent, therefore gas volume can directly obtain by the variation of liquid level wherein in eudiometer tube 1 pipe, range, precision, sensitivity all can be convenient to satisfy needing of trace or a large amount of gas reaction of formation application by the selection of eudiometer tube 1 caliber is controlled.On the other hand, eudiometer tube 1 pipe is interior, the outer liquid level difference of pipe can directly be obtained by the length scale on its tube wall, is convenient to gas actual pressure in the pipe is accurately calculated.Air scoop 2 is the cone of hollow and open at both ends, and cover body wall thickness everywhere is identical, and this geometrical construction of air scoop 2 can guarantee that the insoluble gas product of separating out finally can be pooled in the eudiometer tube 1 smoothly, has avoided the delay at other position.Effective overlay area of air scoop 2 can be by controlling the selection of its big opening end internal diameter flexibly, be convenient to effective collecting zone that physical size is per sample adjusted the insoluble gas product, the generation of the phenomenon of can avoiding becoming flat.Air scoop 2 inner chambers are provided with the sample hook 3 that integral body is " L " type, and an end of sample hook 3 is fixedlyed connected with air scoop 2 cover body inwalls, other end perk, and horizontal segment is for hanging the sample platform or hanging the sample groove.The central point of wherein hanging the sample platform or hanging the sample groove is positioned on the axis of eudiometer tube, helps the test specimen that loads on it is collected with the insoluble gas product of surrounding medium reaction generation.One end of eudiometer tube 1 links to each other with drainage tube 5 by stopcock 4, and its other end links to each other with the little opening end of air scoop 2.The smooth filling of fluid media (medium) in preceding eudiometer tube of gas collection test beginning and the air scoop is convenient in the supporting design of drainage tube 5 and stopcock 4.Drainage tube 5 is a hollow bamboo knarl tube, and its free end is an open type, is convenient to external hose and uses air-breathing instrument manufacturing negative pressure in device, can guarantee the impermeability of flexible pipe and drainage tube 5 junctions simultaneously.
As Fig. 2-shown in Figure 7, be that sample hook 3 they " one " fonts are hung the typical structure synoptic diagram that the sample groove hung in sample platforms or " V " word.Variation, the structural design of becoming privileged greatly facilitate the installation, fixing of test specimen, can firmly load one or more test specimens, thereby satisfy different test needs.
As shown in Figure 8, be enforcement synoptic diagram of the present utility model.Testing with the liberation of hydrogen that utilizes the utility model to carry out the medical magnesium alloy biodegradability is example, and it is as follows to introduce usage of the present utility model in detail: at first this device is carried out vertically fixing; The specimen 9 that is drilled with through hole is in advance carried out pre-treatments such as metallographic polishing, cleaning, drying, the differential of the arc/anodic oxidation, chemical conversion, bionical passivation, electroless plating, afterwards it is fixed on the sample hook 3 by thin nylon wire; The simulated body fluid that configures such as Hank ' s liquid etc. are poured in the test container 8; In the simulated body fluid in the air scoop 2 immersion test containers 8; Open stopcock 4; At drainage tube 5 free end external rubber pipes, use formation negative pressure in device such as air-breathing instrument such as ear washing bulb, simulated body fluid is entered and be full of air scoop 2 and eudiometer tube 1; Liquid level in the adjustment amount tracheae 1; Cut-out tap valve 4; The position of adjusting gear is positioned at the assigned address of test container 8 to the sample on the sample hook 3.With the carrying out of interface reaction between simulated body fluid/test specimen, cathode product H
2Compile to eudiometer tube 1 through air scoop 2, discharge solution wherein, cause the liquid level in the eudiometer tube 1 to descend.During time t, obtain H in the eudiometer tube 1 by containing mark 6
2Growing amount Δ V (t); By altitude scale 7 obtain the pipe in, the pipe outer liquid level difference h (t), H in the binding capacity tracheae 1 initial liquid level recorder calculated amount tracheae 1
2Dividing potential drop P (t) again by Δ V (t), P (t) and gas actual temperature T, calculates H according to the equation of gas state
2Amount of substance, and then calculate H
2Generating rate, and finally obtain the information of magnesium alloy biodegradability aspect.
Claims (5)
1. integrated gas collection measurement mechanism of medical magnesium alloy biodegradability, it is characterized in that comprising eudiometer tube (1), air scoop (2), stopcock (4) and drainage tube (5), wherein eudiometer tube (1) tube wall is with containing mark (6) and length scale (7) respectively, and the scale area tube wall is transparent; Air scoop (2) is the cone of hollow and open at both ends; One end of eudiometer tube (1) links to each other with drainage tube (5) by stopcock (4), and the other end links to each other with the little opening end of air scoop (2).
2. the integrated gas collection measurement mechanism of a kind of medical magnesium alloy biodegradability according to claim 1 is characterized in that: wall thickness is identical everywhere for described air scoop (2) cover body, and its inner chamber is provided with sample hook (3).
3. the integrated gas collection measurement mechanism of a kind of medical magnesium alloy biodegradability according to claim 2, it is characterized in that: described sample hook (3) integral body is " L " type, one end is fixedlyed connected with air scoop (2) cover body inwall, other end perk, horizontal segment has the extension sample platform or " V " font in " one " font band tooth or band hole to hang the sample groove, and the central point of extension sample platform or extension sample groove is positioned on the axis of eudiometer tube (1).
4. the integrated gas collection measurement mechanism of a kind of medical magnesium alloy biodegradability according to claim 1, it is characterized in that: described drainage tube (5) is a hollow ring pipe, and its free end is an open type.
5. the integrated gas collection measurement mechanism of a kind of medical magnesium alloy biodegradability according to claim 1 is characterized in that: described eudiometer tube (1), air scoop (2), stopcock (4) and drainage tube (5) are integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205082931U CN201811912U (en) | 2010-08-27 | 2010-08-27 | Medical magnesium alloy biodegradation performance integrated gas collecting and measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205082931U CN201811912U (en) | 2010-08-27 | 2010-08-27 | Medical magnesium alloy biodegradation performance integrated gas collecting and measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN201811912U true CN201811912U (en) | 2011-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205082931U Expired - Fee Related CN201811912U (en) | 2010-08-27 | 2010-08-27 | Medical magnesium alloy biodegradation performance integrated gas collecting and measuring device |
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|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968477A (en) * | 2010-08-27 | 2011-02-09 | 华南理工大学 | Medical integrated magnesium alloy biodegradability gas-collection measurement device |
-
2010
- 2010-08-27 CN CN2010205082931U patent/CN201811912U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968477A (en) * | 2010-08-27 | 2011-02-09 | 华南理工大学 | Medical integrated magnesium alloy biodegradability gas-collection measurement device |
| CN101968477B (en) * | 2010-08-27 | 2014-12-03 | 华南理工大学 | Medical integrated magnesium alloy biodegradability gas-collection measurement device |
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|---|---|---|---|
| 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: 20110427 Termination date: 20130827 |