CN203396681U - In-store measuring apparatus for porosity of granular mixtures - Google Patents
In-store measuring apparatus for porosity of granular mixtures Download PDFInfo
- Publication number
- CN203396681U CN203396681U CN201320520951.2U CN201320520951U CN203396681U CN 203396681 U CN203396681 U CN 203396681U CN 201320520951 U CN201320520951 U CN 201320520951U CN 203396681 U CN203396681 U CN 203396681U
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- China
- Prior art keywords
- porosity
- pipeline
- gas
- measuring apparatus
- measured
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Abstract
The utility model discloses an in-store measuring apparatus for porosity of granular mixtures, which belongs to a porosity measuring device. The measuring apparatus comprises an air source, a pipeline, an electromagnetic valve, pressure sensors, signal lines, an air storage cylinder, a barn, a peeping window, a sleeve, an end cover, a to-be-tested zone, and a measuring apparatus circuit device, wherein the measuring apparatus circuit device comprises a single chip, a pressure detection circuit, a driver, a display screen, a keyboard and a buzzer; the air source is connected with the pipeline; the electromagnetic valve is arranged on the pipeline; the sealed to-be-tested zone is formed by the sleeve and the end cover; the to-be-tested zone and the air storage cylinder are connected with the pipeline through branch pipes; the pressure sensors are arranged on the air storage cylinder and the end cover and connected with the measuring apparatus circuit device through the signal lines. The device can be used for in-store measurement; the measurement result is close to the actual condition; the porosity is determined in an air inflation manner; the properties and the structures of the granular mixtures are not destroyed; the degree of automation is high; the in-store measuring apparatus has the advantages of being quick and accurate in measurement, convenient to operate and simple in structure; the defects that the measurement result of an existing device does not accord with the actual storage condition, and that the existing device has a complicated structure and is high in cost are overcome.
Description
Technical field
Factor of porosity, with regard to a storehouse measuring instrument, belongs to porosity measurement device
Background technology
Under storage condition, the factor of porosity of diverse location bulk solid is unequal.Owing to pushed by top bulk solid, between the particle of bottom contact tightr, factor of porosity diminishes.Except this vibration also can be played compaction, reduce factor of porosity.Existing porosity measurement device is only measured a small amount of sample, has ignored the impact of a large amount of bulk solid deadweights and vibration, can not truly reflect the factor of porosity of bulk solid under storage condition.
Common porosity measurement method has liquid immersed method, three-dimensional imaging method, equation of gas state method.Because liquid immersed method can change character and the structure of water absorptivity determinand, can not reach the object of Non-Destructive Testing, therefore be not suitable for measuring the factor of porosity of bulk solid (as grain, flour), be commonly used to measure the factor of porosity of poor water absorptivity material (as rock).Liquid has surface tension in addition, is sometimes difficult to enter into tiny Kong Huo gap, has increased measuring error.It is high that three-dimensional imaging method has precision, do not change the advantage of determinand character and structure, but its equipment price is high, and operation and maintenance condition is high, less application in actual measurement.Equation of gas state method is artificially to give determinand injecting gas, according to pressure, changes and indirectly tries to achieve factor of porosity, and the method can be used for bulk solid, but current automation degree of equipment not and the used time longer.
Computer technology, electronic technology, automatic control technology development rapidly, utilize these advanced technology to transform traditional porosity measurement method, realize with regard to storehouse and measuring, and it is very necessary improving measurement result authenticity and automatization level thereof.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, the bulk solid factor of porosity that provide a kind of and measure rapidly accurately, simple operation, automaticity is higher, with regard to storehouse measuring instrument, without sampling, can directly be measured the factor of porosity of diverse location in storehouse.
Factor of porosity, with regard to a storehouse measuring instrument, is characterized in that consisting of source of the gas (1), pipeline (2), electromagnetic valve I (3), pressure transducer I (4), signal wire (5), electromagnetic valve II (6), measuring instrument circuit arrangement (7), silo (8), sleeve (9), district to be measured (10), pressure transducer II (11), hagioscope (12), end cap (13), gas bomb (14); Described source of the gas (1) is connected with pipeline (2), with constant speed, to gas bomb (14), provides pressed gas; Described electromagnetic valve I (3), II (6) are contained on pipeline (2); Described silo (8) has hagioscope (12); Described sleeve (9) is comprised of inner core, urceolus, open bottom end, and there is semidome on top; Outside described inner core bottom, be with convex edge, above have aperture, by web member, rubber sheet gasket, coordinate with end cap (13); Described district airtight to be measured (10) is formed by sleeve (9) and end cap (13), and end cap has air admission hole on (13); Described gas bomb (14), district to be measured (10) are connected with pipeline (2) by arm respectively; Described pressure transducer I (4), II (11) are contained in respectively gas bomb (14) and end cap (13) is upper, and is connected with measuring instrument circuit arrangement (7) by signal wire (5);
Described measuring instrument circuit arrangement (7), is characterized in that consisting of single-chip microcomputer, pressure detection circuit, driver, display screen, keyboard and hummer; The described action of Single-chip Controlling whole system and inlet period, judge in gas bomb and district to be measured, whether gas reaches equilibrium state, the data that reception, storage, computing pressure transducer transmit; The signal that described pressure detection circuit transmits pressure transducer changes into the digital signal that system can be identified; Described display screen shows force value and the bulk solid porosity value that two pressure transducers record successively; Described keyboard is used for inputting inlet period; Described hummer prompting is measured and is finished, and can shut down.
Principle of work of the present invention:
The principle of this measuring instrument is the equation of gas state, i.e. PV=RTm/M (in formula, P is gaseous tension, and V is gas volume, and R is gas constant, and T is temperature, and m is gaseous mass, the molal weight that M is gas).
When electromagnetic valve I (3) is opened, when electromagnetic valve II (6) is closed, system air inlet, air inlet total amount m=P
1v
1/ MRT.After air inlet finishes, electromagnetic valve I (3) closure, electromagnetic valve II (6) is opened, and in gas bomb (14), gas is to district to be measured (10) diffusion, and now the atmospheric pressure value in the two changes.When gas bomb (14) reaches balance with the middle gaseous tension in district to be measured (10), gas stops diffusion, and equalized pressure is P
2, now, gaseous mass m in gas bomb (14)
1=P
2v
1/ MRT, gaseous mass m in district to be measured (10)
2=P
2v
v/ MRT.By the mass conservation, obtain m=m
1+ m
2, i.e. P
1v
1/ MRT=P
2v
1/ MRT+P
2v
v/ MRT, so can be in the hope of factor of porosity P=V
v/ V
2=V
1(P
1-P
2)/(V
2p
2).(P in formula
1for gaseous tension in gas bomb, V
1for gas bomb volume, V
2for district to be measured volume, V
vfor material volume of voids)
Compare with existing apparatus, the invention has the advantages that:
With regard to storehouse, measure, considered bulk solid compacting and vibration effect, measurement result more approaches actual value; Structure and character that gas can not change bulk solid, can realize Non-Destructive Testing; Automaticity is high; Measure rapidly accurately; Simple operation; Simple in structure.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure, 1. source of the gas, 2. pipeline, 3. electromagnetic valve I, 4. pressure transducer I, 5. signal wire, 6. electromagnetic valve II, 7. measuring instrument circuit arrangement, 8. silo, 9. sleeve, 10. district to be measured, 11. pressure transducer II, 12. hagioscopes, 13. end caps, 14. gas bombs.
Fig. 2 is tube-in-tube structure schematic diagram of the present invention.
In figure, 1. inner core, 2. urceolus.
Fig. 3 is end cover structure schematic diagram of the present invention.
Fig. 4 is circuit arrangement structural representation of the present invention.
Embodiment
Connecting line, installs electromagnetic valve I (3), II (6) and sensor I (4), II (11).Semidome alignment by the inside and outside cylinder of sleeve (9), pushes and gets grain from silo hagioscope (12).After grain is full of, inner core is rotated to 90 °, sleeve top is closed, finishes into grain.Sleeve (9) is pulled near hagioscope (12), covers end cap (13), with web member, rubber sheet gasket, sleeve (9) and end cap (13) are coordinated firm, put rubber film, form airtight district to be measured (10).In definite system, connect after close and firm, press switch, system initialization, electromagnetic valve I (3) energising, in opening, electromagnetic valve II (6) closure, system, (is set according to gas bomb capacity and intake velocity) after elapsed time t to gas bomb (14) inflation by certain constant speed (setting according to stock kind), and air inlet finishes, pressure transducer I (4) passes to single-chip microcomputer by measured value, shows the pressure value P in screen display gas bomb (14)
1.Electromagnetic valve I (3) power-off, in closure state, electromagnetic valve II (6) energising, in opening, in gas bomb (14), gas is to district to be measured (10) diffusion, and now the pressure in the two changes, and in the two, gaseous tension reaches balance, gas stops diffusion, and now display screen shows that equalized pressure is P
2.The final porosity value that shows that screen display is tried to achieve by porosity calculation formula.The web member of dismantling, slowly takes out end cap (13), and inner core is rotated to 90 °, and about mistake upper one minute, after pressure decreased, hummer work, presses switch, shuts down, and extracts tracheae (2).In whole process, single-chip microcomputer, by the opening and closing of two solenoid valves of driver control, is stored the measured value P of pressure transducer
1, P
2and automatically calculate factor of porosity p=V
1(P
1-P
2)/(V
2p
2).The value that shows screen display is followed successively by P
1, P
2with P value.
Claims (2)
1. bulk solid factor of porosity, with regard to a storehouse measuring instrument, is characterized in that consisting of source of the gas (1), pipeline (2), electromagnetic valve I (3), pressure transducer I (4), signal wire (5), electromagnetic valve II (6), measuring instrument circuit arrangement (7), silo (8), sleeve (9), district to be measured (10), pressure transducer II (11), hagioscope (12), end cap (13), gas bomb (14); Described source of the gas (1) is connected with pipeline (2), with constant speed, to gas bomb (14), provides pressed gas; Described electromagnetic valve I (3), II (6) are contained on pipeline (2); Described silo (8) has hagioscope (12); Described sleeve (9) is comprised of inner core, urceolus, open bottom end, and there is semidome on top; Outside described inner core bottom, be with convex edge, above have aperture, by web member, rubber sheet gasket, coordinate with end cap (13); Described district airtight to be measured (10) is formed by sleeve (9) and end cap (13), and end cap has air admission hole on (13); Described gas bomb (14), district to be measured (10) are connected with pipeline (2) by arm respectively; Described pressure transducer I (4), II (11) are contained in respectively gas bomb (14) and end cap (13) is upper, and is connected with measuring instrument circuit arrangement (7) by signal wire (5).
2. measuring instrument circuit arrangement according to claim 1 (7), is characterized in that consisting of single-chip microcomputer, pressure detection circuit, driver, display screen, keyboard and hummer; The described action of Single-chip Controlling whole system and inlet period, judge in gas bomb and district to be measured, whether gas reaches equilibrium state, the data that reception, storage, computing pressure transducer transmit; The signal that described pressure detection circuit transmits pressure transducer changes into the digital signal that system can be identified; Described display screen shows force value and the bulk solid porosity value that two pressure transducers record successively; Described keyboard is used for inputting inlet period; Described hummer prompting is measured and is finished, and can shut down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320520951.2U CN203396681U (en) | 2013-08-23 | 2013-08-23 | In-store measuring apparatus for porosity of granular mixtures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320520951.2U CN203396681U (en) | 2013-08-23 | 2013-08-23 | In-store measuring apparatus for porosity of granular mixtures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203396681U true CN203396681U (en) | 2014-01-15 |
Family
ID=49908205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320520951.2U Withdrawn - After Issue CN203396681U (en) | 2013-08-23 | 2013-08-23 | In-store measuring apparatus for porosity of granular mixtures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203396681U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411872A (en) * | 2013-08-23 | 2013-11-27 | 西北农林科技大学 | Measuring instrument for porosity of granular mixtures in granary |
-
2013
- 2013-08-23 CN CN201320520951.2U patent/CN203396681U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411872A (en) * | 2013-08-23 | 2013-11-27 | 西北农林科技大学 | Measuring instrument for porosity of granular mixtures in granary |
| CN103411872B (en) * | 2013-08-23 | 2016-08-17 | 西北农林科技大学 | A kind of bulk solid porosity is with regard to storehouse measuring instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140115 Effective date of abandoning: 20160817 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |