CN205808768U - The device of micro volume solution in a kind of in-situ acquisition gap - Google Patents
The device of micro volume solution in a kind of in-situ acquisition gap Download PDFInfo
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- CN205808768U CN205808768U CN201620770841.5U CN201620770841U CN205808768U CN 205808768 U CN205808768 U CN 205808768U CN 201620770841 U CN201620770841 U CN 201620770841U CN 205808768 U CN205808768 U CN 205808768U
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Abstract
In a kind of in-situ acquisition gap of this utility model offer, the device of micro volume solution, belongs to metal material technical field of anticorrosion.This device includes vacuum pump, connecting tube, valve, collection tank, Pressure gauge, little collecting bottle, seal member and tubule etc..By vacuum pump extraction collection pressure inside the tank, making collection tank be in negative pressure, when in collection tank, negative pressure is less than negative pressure at gap, connection gathers the tubule in tank and gap and can be imported in little collecting bottle by solution at gap, thus completes sampling process.The method realizes the in-situ acquisition of micro volume solution in gap first, and sampling volume is little, and sampling accuracy is high.
Description
Technical field
This utility model relates to metal material technical field of anticorrosion, particularly relates to micro volume in a kind of in-situ acquisition gap
The device of solution.
Background technology
When crevice corrosion occurs, in gap, the composition of solution, concentration etc. are extremely different with external solution.Want clear and definite gap rotten
Environmental condition, process and the behavior that erosion occurs, one of basic method is to investigate thoroughly composition and the concentration of solution in gap, and this needs
From gap, directly to gather solution and to carry out quantitative analysis.But owing to inner space, gap is the least, its volume is often micro-
Rise magnitude, micro solution can only be gathered in order to analyze.In order to accurately obtain the micro solution in gap, in needing during collection to use
The superfine pipe in footpath is with liquor capacity shared in reducing pipe as far as possible.But owing to solution flow resistance in tubule is big so that tubule
Inlet outlet pressure differential big, use dosing pump not extracted out by the solution in pipe, pump head inner space also can take in a large number simultaneously
Solution.It addition, in some engineering structure, in gap, solution is likely to be at subnormal ambient, such as turbine blade root is fixed
The gap etc. at place.In subnormal ambient, in gap, the in-situ acquisition difficulty of solution is higher.The most not yet disclose and reported
Solution harvester in similar gap, therefore the in-situ acquisition system of micro volume solution in exploitation gap, especially for negative pressure
Gap solution in environment, has particularly important scientific research and engineer applied is worth.
Utility model content
This utility model is to solve the technical problem that the in-situ acquisition difficulty of micro volume solution is big in gap, it is provided that a kind of
The device of micro volume solution in in-situ acquisition gap.
This device includes vacuum pump, connecting tube, collection tank, vacuum table, little collecting bottle and tubule, and vacuum pump passes through connecting tube
Being connected with gathering tank, be used for aspirating air, make collection tank produce negative pressure, gather tank and connect vacuum table, vacuum table is used for the most aobvious
Showing that collection pressure inside the tank, little collecting bottle are arranged in collection tank, little collecting bottle is connected with tubule one end, and the tubule other end extend into
In gap；Arranging valve one in connecting tube, connecting tube is at valve one and gathers between tank and has branch road, branch road directly with big gas phase
Logical, branch road arranges valve two.
Wherein, connecting tube stretches in collection tank, and connecting tube is sealed by seal member with gathering tank junction；Vacuum table
Connect pipeline to stretch into inside collection tank, connect pipeline and sealed by seal member with gathering tank junction；Tubule connects with gathering tank
The place of connecing is sealed by seal member.
Little collecting bottle open-ended, tubule is directly protruding in little collecting bottle, and little collecting bottle volume is 50-100 microlitre, is used for storing up
Deposit the crevice corrosion solution collected.Capillary inside diameter is 0.10-0.20mm, and capillary length is generally no greater than 2m, can greatly reduce
Residual solution in pipe.
In the in-situ acquisition gap that this device relates to, the method for micro volume solution, specifically comprises the following steps that and is first turned on
Valve one, closes valve two, starts vacuum pump；Vacuum pump extraction gathers air in tank, reaches negative pressure, work as collection in making collection tank
When in tank, negative pressure is less than negative pressure at gap, the solution in gap is flowed in little collecting bottle by tubule；Collect the desired amount of molten
After liquid, stopping vacuum pump work, close valve one, open valve two, air enters from valve two place branch road and gathers tank, makes to adopt
Collection tank is interior identical with atmospheric pressure；Finally open collection tank, take out little collecting bottle, the solution collected is analyzed.
Vacuum pump in this utility model, can reach different solution acquisition rates by regulating different pressure-reduction levels.
Having the beneficial effect that of technique scheme of the present utility model:
1, this utility model is capable of the minute during in-situ acquisition is in the normal pressure even gap of negative pressure state
Long-pending solution.
2, this utility model is by using tubule to sample, and little collecting bottle stores, it is achieved that the trace collection of solution in gap.
3, this utility model is by controlling the pressure-reduction level of vacuum pump, it is achieved that the collection speed of solution in different gaps
Rate, can meet the sample volume precision of minimum 3-5 microlitre.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram of micro volume solution in in-situ acquisition gap of the present utility model.
Wherein: 1-vacuum pump；2-connecting tube；3-gathers tank；4-vacuum table；The little collecting bottle of 5-；6-seal member；7-is thin
Pipe；8-gap；V1-valve one；V2-valve two.
Detailed description of the invention
For making the technical problems to be solved in the utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing
And specific embodiment is described in detail.
This utility model is for the big problem of the in-situ acquisition difficulty of micro volume solution in existing gap, it is provided that a kind of
The device of micro volume solution in in-situ acquisition gap.
As it is shown in figure 1, be the structural representation of this device, this device includes vacuum pump 1, connecting tube 2, gathers tank 3, negative pressure
Table 4, little collecting bottle 5 and tubule 7, vacuum pump 1 is connected with gathering tank 3 by connecting tube 2, and collection tank 3 connects vacuum table 4, little adopts
Collection bottle 5 is arranged in collection tank 3, and little collecting bottle 5 is connected with tubule 7 one end, and tubule 7 other end extend in gap 8；Connecting tube
Arranging valve one V1 on 2, connecting tube 2 has branch road between valve one V1 and collection tank 3, and branch road directly communicates with air,
Valve two V2 is set on road.
It is explained below in conjunction with specific embodiment.
Easily be in the crevice corrosion of subnormal ambient in turbine blade root bearing, at its gap, negative pressure value is about
For-10kPa, it is high that solution gathers difficulty.The original-position collecting device of micro volume solution in a kind of gap that this utility model provides
And method can in situ accurate acquisition the composition of solution and concentration in analyzing gap.
Vacuum pump 1 uses 1/4 inch of connector in this example, is connected to gather tank 3 by rustless steel connecting tube 2；Connect
Pipe 2 is provided with valve one V1, and pipeline connects a branch road at valve one V1 near gathering the threeway of tank 3 side；Branch road is provided with valve
Door two V2, are used for connecting air；
Gathering tank 3, use transparent wide mouth glass bottle, bottleneck uses serum cap to seal, and serum cap has three through holes, uses
Connect the seal member 6 of three pipelines；
The range that vacuum table 4 selects is 0 to-50kPa, and interface connects 1/4 inch of rustless steel connecting tube, and connecting tube is by close
It is internal that envelope parts 6 lead to collection tank 3；
Tubule 7 select be internal diameter be the Teflon tubule of 0.17mm, a length of 1m, then tubule 7 internal cavity volume be about
23 microlitres, tubule 7 one end is inserted in little collecting bottle 5 by seal member 6, and the other end is connected in gap 8；Little collecting bottle 5,
The uncovered plastic bottle using volume to be 50 microlitres is identical with the gas pressure gathered in tank 3.
Vacuum pump 1 can be drawn into different pressure-reduction levels (0 arrives-50kPa), thus obtains different solution acquisition rates.
In this example, when collection tank 3 negative pressure reaches-50kPa, solution acquisition rate is about 20 mul/min.
In gap, the gatherer process of solution is as follows: be first turned on valve one V1, closes valve two V2, starts vacuum pump 1.Very
Empty pump 1 extraction gathers air in tank 3 so that it is negative pressure reaches-50kPa, so gather negative pressure in tank 3 be less than negative pressure at gap 8-
10kPa, the etchant solution in gap 8 is flowed in little collecting bottle 5 by tubule 7 with the speed of about 20 mul/min.Collect 50
During the solution of microlitre, stopping vacuum pump 1 and work, close valve one V1, open valve two V2, air is from valve two V2 place branch road
Enter and gather tank 3, gather pressure in tank 3 reach identical with atmospheric pressure after, open collection tank 3, take out little collecting bottle 5, to collection
To solution carry out next step analyze.
The above is preferred implementation of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of without departing from principle described in the utility model, it is also possible to make some improvements and modifications, these improve
Also protection domain of the present utility model is should be regarded as with retouching.
Claims (4)
1. the device of micro volume solution in an in-situ acquisition gap, it is characterised in that: include vacuum pump (1), connecting tube
(2), gathering tank (3), vacuum table (4), little collecting bottle (5) and tubule (7), vacuum pump (1) is by connecting tube (2) and collection tank
(3) connecting, gather tank (3) and connect vacuum table (4), little collecting bottle (5) is arranged in collection tank (3), little collecting bottle (5) and tubule
(7) one end is connected, and tubule (7) other end extend in gap (8)；Valve one (V1), connecting tube (2) are set in connecting tube (2)
Having branch road between valve one (V1) and collection tank (3), branch road directly communicates with air, and branch road arranges valve two (V2).
The device of micro volume solution in in-situ acquisition gap the most according to claim 1, it is characterised in that: described connection
Pipe (2) stretches in collection tank (3), and connecting tube (2) is sealed by seal member (6) with gathering tank (3) junction；Described vacuum table
(4) it is internal that connection pipeline stretches into collection tank (3), connects pipeline and is sealed by seal member (6) with gathering tank (3) junction；
Described tubule (7) is sealed by seal member (6) with gathering tank (3) junction.
The device of micro volume solution in in-situ acquisition gap the most according to claim 1, it is characterised in that: described little adopt
Collection bottle (5) open-ended, tubule (7) is directly protruding in little collecting bottle (5), and little collecting bottle (5) volume is 50-100 microlitre.
The device of micro volume solution in in-situ acquisition gap the most according to claim 1, it is characterised in that: described tubule
(7) internal diameter is 0.10-0.20mm, and tubule (7) length is not more than 2m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620770841.5U CN205808768U (en) | 2016-07-20 | 2016-07-20 | The device of micro volume solution in a kind of in-situ acquisition gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620770841.5U CN205808768U (en) | 2016-07-20 | 2016-07-20 | The device of micro volume solution in a kind of in-situ acquisition gap |
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| Publication Number | Publication Date |
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| CN205808768U true CN205808768U (en) | 2016-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973647A (en) * | 2016-07-20 | 2016-09-28 | 彭清怡 | Device and method for collecting tiny-volume solution in gap in situ |
-
2016
- 2016-07-20 CN CN201620770841.5U patent/CN205808768U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973647A (en) * | 2016-07-20 | 2016-09-28 | 彭清怡 | Device and method for collecting tiny-volume solution in gap in situ |
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| GR01 | Patent grant |