CN202583027U - True density meter utilizing gas replacement method - Google Patents
True density meter utilizing gas replacement method Download PDFInfo
- Publication number
- CN202583027U CN202583027U CN 201220140709 CN201220140709U CN202583027U CN 202583027 U CN202583027 U CN 202583027U CN 201220140709 CN201220140709 CN 201220140709 CN 201220140709 U CN201220140709 U CN 201220140709U CN 202583027 U CN202583027 U CN 202583027U
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- sample cell
- real density
- snorkel
- valve
- reference cavity
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Abstract
The utility model discloses a true density meter utilizing a gas replacement method, which belongs to the field of density measurement. The true density meter comprises a reference cavity, a breathing pipe, a pneumatic control valve, a manometer and a sample cell, wherein one end of the breathing pipe is arranged on the reference cavity and is communicated with the inner part of the reference cavity; the pneumatic control valve and the manometer are arranged on the breathing pipe; an inner chamber of the sample cell is taken as a testing cavity, and an opening communicated with the testing cavity is formed on the sample cell; and the opening of the sample cell is connected with the other end of the breathing pipe in a sealing manner, so as to lead the testing cavity of the sample cell to be communicated with the inner part of the reference cavity through the breathing pipe. The true density meter adopts the pneumatic control valve that utilizes gas to push a valve core to open and close the valve, and heat quantity cannot be generated continuously during the operation process of the pneumatic control valve, so that the heating phenomenon of a conventional true density meter adopting a solenoid valve can be solved fundamentally, measurement error that is caused by the heating of a valve body of the solenoid valve can be eliminated thoroughly, and the measuring accuracy of the true density meter utilizing the gas replacement method is improved.
Description
Technical field
The utility model relates to the density measuring equipment field, relates in particular to a kind of real density appearance that utilizes the gas displacement method to carry out density measure.
Background technology
The gas displacement method is the Archimedes principle of application of gas displacement, and the volume that utilizes sample to arrange gas under certain condition comes the volume of working sample, accurately measures the true volume of measured material, thereby obtains its real density (density=mass/volume).The test macro of instrument is made up of sample test chamber and reference cavity.During working sample density, instrument is gathered pressure P 1 and the volume V1 and the record of reference cavity automatically; The sample V sample of certain unknown volume is put into the sample test chamber of known volume V2, inject a certain amount of gas and the record pressure P 2 after stable to the sample test chamber; The sample test chamber is communicated with reference cavity and writes down the pressure P 3 after stable, can calculate sample volume V sample to be measured, the real density of calculating sample by the quality and the volumescope of sample again with relevant known volume V1, V2 according to the force value behind the balance and stability.In the above test process, gas is pressed desirable gas processing, and thinks that the temperature of reference cavity and test chamber is identical.
Aspect instrument realization and gas circuit control, present existing gas displacement method real density appearance adopts solenoid valve usually.A kind of magnetic force that is produced during through coil by electricity of solenoid valve drives spool, thereby realizes the switching function of valve; When valve closing, the space that is formed sealing by valve, pipeline, sample cell, pressure transducer etc. is used as reference cavity and test chamber.
There is following problem at least in above-mentioned prior art: from above-mentioned gas displacement ratio juris, can know, in test process, think that the temperature of reference cavity and test chamber is identical.But the quantity of the valve that reference cavity is connected with test chamber is different, and the time of the energising work of each valve also is different; When solenoid valve during work, will inevitably produce heat in energising; This heat will make the valve body heating, because the space in the valve body also is the component part of reference cavity and test chamber, just can make the temperature of reference cavity and test chamber produce difference; The difference of this temperature is difficult to measure accurately, thereby will impact measuring accuracy; Though the solenoid valve of low heating is arranged, also can't fundamentally eliminate the heating phenomenon, cause influencing the accuracy of gas displacement method real density appearance.
The utility model content
The utility model embodiment provides a kind of real density appearance that utilizes the gas displacement method that operation valve can not generate heat in measuring process; Adopt solenoid valve as operation valve thereby solve the real density appearance that utilizes the gas displacement method at present, the problem of warming-up effect measurement result accuracy when having solenoid valve work.
The technical scheme that solves the problems of the technologies described above is following:
The present embodiment embodiment provides a kind of real density appearance that utilizes the gas displacement method, comprising:
Reference cavity, snorkel, Pneumatic valve, pressure gauge and sample cell; Wherein,
Said snorkel one end is arranged on the reference cavity, with the reference cavity internal communication, said Pneumatic valve and pressure gauge is set on the snorkel;
Said sample cell inner chamber is as test chamber, and sample cell is provided be communicated with said test chamber uncovered;
Uncovered and the said snorkel other end of said sample cell is tightly connected, and the said test chamber that makes sample cell is communicated with in said snorkel and said reference cavity.
Can find out by the above-mentioned technical scheme that provides; The real density appearance that the utility model embodiment provides; Owing to adopt gas to promote the Pneumatic valve that spool is realized valve switch, do not have lasting heat in the course of work of Pneumatic valve and produce, fundamentally solved the heating phenomenon of the real density appearance of present employing solenoid valve; Thoroughly eliminate the electromagnetic valve body heating and introduced the error of measuring, improved the measuring accuracy of the real density appearance that utilizes the gas displacement method.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the utility model embodiment; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skill in the art; Under the prerequisite of not paying creative work, can also obtain other accompanying drawings according to these accompanying drawings.
The structural representation of the real density appearance that utilizes the gas displacement method that Fig. 1 provides for the utility model embodiment;
The structural representation of the sample cell of the real density appearance that Fig. 2 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment of the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the protection domain of the utility model.
To combine accompanying drawing that the utility model embodiment is done to describe in detail further below.
The utility model embodiment provides a kind of real density appearance that utilizes the gas displacement method, and like Fig. 1, shown in 2, this real density appearance comprises: reference cavity 7, snorkel 3, Pneumatic valve 4, pressure gauge 5 and sample cell 1;
Wherein, snorkel 3 one ends are arranged on the reference cavity 7, with reference cavity 7 internal communication, Pneumatic valve 4 and pressure gauge 5 are set on the snorkel 3; Sample cell 1 inner chamber is a test chamber 11; Test chamber 11 plays the effect that is used to test and place sample; Sample cell 1 be provided be communicated with test chamber 11 uncovered 2; Uncovered 2 of sample cell 1 is tightly connected with snorkel 3 other ends, and the test chamber 11 that makes sample cell 1 is communicated with in snorkel 3 and reference cavity 7.
Pneumatic valve 4 in the above-mentioned real density appearance can adopt the pneumatic control valve of gas control valve core switch, also can adopt existing pneumatic control valve.
Uncovered 2 of the sample cell 1 of above-mentioned real density appearance is arranged on the upper end of sample cell 1, the extreme direction that snorkel 3 is connected with uncovered 2 of sample cell 1 down, sample cell 1 can upwards be installed on the described snorkel like this.
Above-mentioned real density appearance can also be provided with seal member 6, and seal member 6 is arranged on snorkel 3 and connects on the end that uncovered 2 of sample cells 1 connect.
Be to guarantee the steadiness that sample cell is connected with snorkel, can bear corresponding pressure during the assurance specimen, can sample cell 1 uncovered 2 outside be provided with annular projection.Specifically can turn up, form the edge 12 of a circle annular projection in open top end in uncovered 2 upper edges that make sample cell 1.Sample cell can adopt the upper end to be provided with uncoveredly in the reality, and open top end is provided with the glass cylinder on flanging edge.
The sample cell of different big or small volumes can be set as required.The adjusting parts (not shown) of regulating the sample cell internal volume also can be set in sample cell, regulate the object piece that parts can adopt fixed volume, be pre-charged with in the sample cell during use.
Utilize above-mentioned real density appearance; During test, put into sample cell to the sample of certain known quality earlier, will directly insert as the sample cell of test chamber in the snorkel (gas circuit) then; The test chamber of sample cell is communicated with reference cavity; Beginning is test automatically, and pneumatic valve can not generated heat by pneumatic control in the test process, can not influence The ultimate results.Because sample cell needs from bottom to top to insert test gas circuit (being snorkel) usually, this real density appearance can be called " down-mounting type " real density appearance.
The real density appearance of the utility model embodiment; Owing to adopt gas to promote the Pneumatic valve that spool is realized valve switch; Not having lasting heat in the course of work of Pneumatic valve produces; Fundamentally solve the heating phenomenon of the real density appearance of present employing solenoid valve, thoroughly eliminated the electromagnetic valve body heating and the error of introducing measurement, improved the measuring accuracy of the real density appearance that utilizes the gas displacement method.
The above; Be merely the preferable embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Any technician who is familiar with the present technique field is in the technical scope that the utility model discloses, and the variation that can expect easily or replacement all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain of claims.
Claims (8)
1. a real density appearance that utilizes the gas displacement method is characterized in that, comprising:
Reference cavity, snorkel, Pneumatic valve, pressure gauge and sample cell; Wherein,
Said snorkel one end is arranged on the reference cavity, with the reference cavity internal communication, said Pneumatic valve and pressure gauge is set on the snorkel;
Said sample cell inner chamber is as test chamber, and sample cell is provided be communicated with said test chamber uncovered;
Uncovered and the said snorkel other end of said sample cell is tightly connected, and the said test chamber that makes sample cell is communicated with in said snorkel and said reference cavity.
2. real density appearance according to claim 1 is characterized in that, said Pneumatic valve is the pneumatic control valve of gas control valve core switch.
3. real density appearance according to claim 1 is characterized in that, the uncovered upper end that is arranged on said sample cell of said sample cell.
4. according to claim 1,2 or 3 described real density appearance, it is characterized in that a uncovered extreme direction that is connected of said snorkel and said sample cell down.
5. according to claim 1,2 or 3 described real density appearance, it is characterized in that said real density appearance also comprises: seal member is arranged on the uncovered end that is connected of snorkel and said sample cell.
6. real density appearance according to claim 1 is characterized in that, the uncovered outer annular projection that is provided with of said sample cell.
7. real density appearance according to claim 1 is characterized in that, turns up in the uncovered upper edge of said sample cell, forms the edge of a circle annular projection in open top end.
8. real density appearance according to claim 1 is characterized in that, also is provided with the adjusting parts of regulating the sample cell internal volume in the said sample cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220140709 CN202583027U (en) | 2012-04-05 | 2012-04-05 | True density meter utilizing gas replacement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220140709 CN202583027U (en) | 2012-04-05 | 2012-04-05 | True density meter utilizing gas replacement method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202583027U true CN202583027U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220140709 Expired - Lifetime CN202583027U (en) | 2012-04-05 | 2012-04-05 | True density meter utilizing gas replacement method |
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| Country | Link |
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| CN (1) | CN202583027U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218815A (en) * | 2021-04-19 | 2021-08-06 | 北京科技大学 | Pore channel integrated module and method for determining material density based on gas displacement method |
-
2012
- 2012-04-05 CN CN 201220140709 patent/CN202583027U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218815A (en) * | 2021-04-19 | 2021-08-06 | 北京科技大学 | Pore channel integrated module and method for determining material density based on gas displacement method |
| CN113218815B (en) * | 2021-04-19 | 2022-05-17 | 北京科技大学 | Pore channel integrated module and method for determining material density based on gas displacement method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |