CN106092235B - Micro gas flowmeter with adjustable resolution - Google Patents
Micro gas flowmeter with adjustable resolution Download PDFInfo
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- CN106092235B CN106092235B CN201610645073.5A CN201610645073A CN106092235B CN 106092235 B CN106092235 B CN 106092235B CN 201610645073 A CN201610645073 A CN 201610645073A CN 106092235 B CN106092235 B CN 106092235B
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- gas
- collecting unit
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- closed container
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F3/00—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
- G01F3/24—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers moved during operation
- G01F3/28—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers moved during operation on carriers rotated by the weight of the liquid in the measuring chambers
Abstract
The invention relates to the technical field of gas flow measurement, and particularly discloses a micro gas flow meter with adjustable resolution, which comprises a closed container, an air inlet pipe, an air outlet pipe, a liquid medium, a central pivot, a balance tank body, a weight regulator, a first cavity gas collecting unit, a second cavity gas collecting unit and a counter, wherein the balance tank body is arranged in the liquid medium in the closed container through the central pivot, the weight regulator is arranged in the balance tank body and can freely slide along the balance tank body, the first cavity gas collecting unit and the second cavity gas collecting unit are connected together and reversely buckled at the lower side of the balance tank body and are respectively positioned at two sides of the central pivot, an air inlet of the air inlet pipe is positioned below the joint of the first cavity gas collecting unit and the second cavity gas collecting unit, and the counter is connected with the central pivot. The invention can adjust the lifting force to change the resolution of the measuring unit to adapt to the measurement in different gas flow ranges, and simultaneously can avoid the gas leakage in the measuring process to ensure the measuring accuracy.
Description
Technical Field
The invention relates to the technical field of gas flow measurement, in particular to a micro gas flow meter with adjustable resolution ratio based on a gas-liquid displacement principle.
Background
The flow meters for measuring the accumulated gas are very wide, but most of the current gas flow meters cannot record the production of the accumulated gas, and the design of the other part is complicated. These gas flow meters generally suffer from the following disadvantages: the adjustability is poor, and the test under different conditions cannot be well adapted to; air leakage during gas measurement results in underestimation of measurement results; the requirement for the liquid medium is high, and the liquid medium needs to be replaced frequently. The use of micro-flow meters designed by the principle of buoyancy is relatively common, however, simple and economical micro-flow meters suitable for metering accumulated gas have not been successfully designed by the principle of buoyancy.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a micro gas flowmeter with adjustable resolution ratio, which is suitable for measurement in different gas flow ranges and simultaneously avoids gas leakage in the measurement process to ensure the measurement accuracy.
(II) technical scheme
In order to solve the technical problem, the invention provides a micro gas flowmeter with adjustable resolution, which comprises a closed container, an air inlet pipe, an air outlet pipe, a liquid medium, a central pivot, a balance groove body, a weight adjuster, a first cavity gas collection unit, a second cavity gas collection unit and a counter, wherein the closed container is provided with a gas inlet pipe and a gas outlet pipe; the liquid medium is positioned in the closed container, the air inlet pipe is arranged at the lower part of the closed container, and the air outlet pipe is arranged at the upper part of the closed container; the center pivot penetrates through the center of the balance groove body, the balance groove body is arranged in the liquid medium in the closed container through the center pivot, the balance groove body can freely rotate relative to the closed container together with the center pivot, and the gravity regulator is arranged in the balance groove body and can freely slide along the balance groove body; the first cavity gas collecting unit and the second cavity gas collecting unit are connected together and reversely buckled at the lower side of the balance groove body and are respectively positioned at two sides of the central pivot, and the gas inlet of the gas inlet pipe is positioned below the joint of the first cavity gas collecting unit and the second cavity gas collecting unit; the counter is connected with the central pivot and used for counting the rotation condition of the central pivot.
Preferably, the first cavity gas collecting unit and the second cavity gas collecting unit are formed by separating the lower surface of the balance groove body, the partition plate and the baffle plate, the lower surface of the balance groove body, the partition plate and the baffle plate are perpendicular to each other, the upper end of the partition plate is connected to the central line of the lower surface of the balance groove body, the two baffle plates are respectively connected to the front end and the rear end of the partition plate, and the upper ends of the two baffle plates are connected to the lower surface of the balance groove body.
Preferably, the baffle is an inverted isosceles triangle, the isolation plate is connected to the center line of the baffle, and the lower end of the isolation plate is flush with the lower end of the baffle.
Preferably, the weight regulator is a sphere.
Preferably, a first adjusting knob and a second adjusting knob are respectively arranged at two ends of the balance groove body.
Preferably, the liquid medium is a liquid that does not dissolve gases.
Preferably, the liquid medium is water.
Preferably, a gas phase space exists in the closed container.
Preferably, the counter is a mechanical counter.
Alternatively, the counter is a sensor counter.
(III) advantageous effects
The micro gas flowmeter with the adjustable resolution can adjust the lifting force to change the resolution of the measuring unit to adapt to the measurement in different gas flow ranges, and simultaneously can avoid the gas leakage in the measuring process to the greatest extent to ensure the measuring accuracy.
Drawings
FIG. 1 is a front view of an adjustable resolution micro gas flow meter according to an embodiment of the invention;
FIG. 2 is a side view of an adjustable resolution micro gas flow meter according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a first chamber gas collecting unit of the micro gas flowmeter with adjustable resolution according to the embodiment of the invention;
fig. 4 is a schematic diagram of the second cavity gas collecting unit of the resolution-adjustable trace gas flowmeter according to the embodiment of the invention during gas collection.
In the figure, 1: an air inlet pipe; 2: air bubbles; 3: a liquid medium; 4: a closed container; 5: an air outlet pipe; 6: a gravity adjuster; 7: a balance groove body; 8: a central pivot; 9: a first cavity gas collection unit; 10: a separator plate; 11: a second cavity gas-collecting unit; 12: an air inlet; 13: a gas phase space; 14: a second adjustment knob; 15: a first adjusting knob; 16: the bottom end of the isolation plate; 17: a counter; 18: and a baffle plate.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1 and 2, the resolution-adjustable trace gas flowmeter of the present embodiment includes: the device comprises a closed container 4, an air inlet pipe 1, an air outlet pipe 5, a liquid medium 3, a central pivot 8, a balance groove body 7, a weight regulator 6, a first cavity gas collection unit 9, a second cavity gas collection unit 11 and a counter 17.
The closed container 4 is a housing of the flowmeter of the embodiment, the closed container 4 adopts a sealing structure, the liquid medium 3 is contained in the closed container 4, the liquid medium 3 should be a high-density liquid which does not dissolve gas, such as water, and a gas phase space 13 is also present in the closed container 4 above the page of the liquid medium 3.
The gas inlet pipe 1 is arranged at the lower part of the closed container 4, and specifically, the gas inlet pipe 1 penetrates through the side wall of the closed container 4 to communicate the outside with a liquid medium 3 in the closed container 4 and is used for conveying gas to be measured with certain pressure into the closed container 4; the gas outlet pipe 5 is arranged at the upper part of the closed container 4, and specifically, the gas outlet pipe 5 penetrates through the upper wall of the closed container 4 to communicate the outside with the gas phase space 13 in the closed container 4, and is used for discharging the gas to be measured out of the closed container 4. The gas to be measured is connected with the gas inlet pipe 1 through an external pipeline and is introduced into the liquid medium 3 in the closed container 4, bubbles 2 are formed and finally float upwards from the gas inlet 12 to pass through the liquid level close to the bottom of the cavity, and then enter the gas phase space 13 and are introduced into the gas outlet pipe 5.
The central pivot 8 penetrates through the center of the balance groove body 7 from the front and back direction, the balance groove body 7 is arranged in the liquid medium 3 in the closed container 4 through the central pivot 8, the balance groove body 7 can freely rotate or swing left and right relative to the closed container 4 together with the central pivot 8, the weight regulator 6 is arranged in the balance groove body 7, the weight regulator 6 can be a sphere, the weight regulator 6 can freely slide along the balance groove body 7, the left end and the right end of the balance groove body 7 can be respectively provided with a first regulating knob 15 and a second regulating knob 14, and the first regulating knob 15 and the second regulating knob 14 are used for regulating the moving positions of the weight regulator 6 at the two ends of the balance groove body 7 in a manner of rotating movement in a threaded connection manner, so that the gravity regulation is realized again.
The first cavity gas collecting unit 9 and the second cavity gas collecting unit 11 have the same size, are connected together, are reversely buckled at the lower side of the balance groove body 7 and are respectively positioned at the left side and the right side of the central pivot 8, and the air inlet 12 of the air inlet pipe 1 is positioned below the joint of the first cavity gas collecting unit 9 and the second cavity gas collecting unit 11.
In this embodiment, first cavity gas collection unit 9 and second cavity gas collection unit 11 are by the lower surface of balanced cell body 7, division board 10 and baffle 18 are separated and are formed, the lower surface of balanced cell body 7, division board 10 and baffle 18 mutually perpendicular, the upper end of division board 10 is connected in the central line department of the fore-and-aft direction of the lower surface of balanced cell body 7, baffle 18 is two and connects respectively in the front and back both ends of division board 10, the upper end of two baffle 18 all is connected in the lower surface of balanced cell body 7, it is concrete, baffle 18 is preferred the isosceles triangle who inverts, division board 10 connects in the central line department of the upper and lower direction of baffle 18 and the lower extreme parallel and level of division board 10 lower extreme and baffle 18. In addition, the first cavity gas collecting unit 9 and the second cavity gas collecting unit 11 with other similar structural forms can also achieve the purpose of gas collection in this embodiment, and are not described again here.
The counter 17 is connected to the central pivot 8 for counting the rotation of the central pivot 8, the counter 17 may be a mechanical counter, or the counter 17 may be a sensor counter. The mechanical counter can be mechanically driven by the central pivot 8 without external force, and certainly, when the first cavity gas collecting unit 9 and the second cavity gas collecting unit 11 drive the central pivot 8 to rotate, the mechanical counter can be replaced by a sensor such as a reed or a mercury switch which can be installed on the central pivot 8, and then an electronic recorder is externally connected to record the generated accumulated gas. The gas counter 17 can be designed so that a readable correction system can be connected.
The working principle of the micro gas flowmeter with the adjustable resolution ratio of the embodiment is as follows:
the gas to be measured is connected with the gas inlet pipe 1 through an external pipeline and is introduced into the liquid medium 3 in the closed container 4, bubbles 2 are formed and finally float upwards from the gas inlet 12 to pass through the liquid level close to the bottom of the cavity, and then enter the gas phase space 13 and are introduced into the gas outlet pipe 5.
The air bubbles 2 float from the air inlet 12 and are temporarily collected in the inverted cavity, the inverted cavity is a pair of triangular cavity air collecting units (a first cavity air collecting unit 9 and a second cavity air collecting unit 11) which are inclined downwards, the two air collecting units are connected by a balance groove body 7 and swing towards two sides through a central pivot 8, and a separation plate 10 between the two air collecting units is positioned in the middle of the balance groove body 7 and used for realizing the separation of the two air collecting units.
As shown in fig. 3, when the gas collecting units are in the left-right non-horizontal position, the gas entering from the gas inlet pipe 1 will be collected in one of the gas collecting units (the left first cavity gas collecting unit 9), in this position, the balance trough body 7 is inclined to the left, and the bottom end 16 of the partition board 10 is on the right of the gas inlet 12, so that the inlet gas can be ensured to enter the first cavity gas collecting unit 9.
As shown in fig. 4, when the gas collecting unit is converted into another gas collecting unit (the right second chamber gas collecting unit 11) due to buoyancy, the two gas collecting units perform exchange operation, and after the gas collected in the first chamber gas collecting unit 9 is released, bubbles will be collected in the second chamber gas collecting unit 11, so that the bottom end 16 of the partition board 10 moves to the other side, and it is ensured that the gas enters the second chamber gas collecting unit 11.
The first adjusting knob 15 and the second adjusting knob 16 are located at the left end and the right end of the balance groove body 7, the adjusting knobs can control the rolling positions of the weight regulator 6 in the balance groove body 7, and different air collection amounts are generated at different positions so as to realize the change of the resolution. The position of the gravity regulator 6 is changed, so that the buoyancy generated by accumulated gas arranged in the two gas collecting units pushes the gas collecting units to rotate around the central pivot 8, so that the gas collecting units incline, and the gas collecting units are quickly switched between the two gas exchanging and collecting units. Once the gravity regulator 6 has moved past the central position, i.e. the vertical position of the gas inlet 1 and the central pivot 8, the gas collection units will settle until a sufficient amount of gas has once again accumulated in one of the two gas collection units, and when one gas collection unit collects and accumulates gas, the previous gas collection unit that collected gas will release gas to control the gravity regulator 6 to roll to the opposite position, the power resulting from the accumulated gas repeatedly exchanging the gas collection units. The steps enable the accurate accumulated gas in each gas collecting unit to be repeatedly converted and adjusted, and no gas is leaked in the conversion process.
Each exchange of the gas collection unit of the gas meter corresponds to a preset gas quantity, which is recorded by the counter 17.
The micro gas flowmeter with the adjustable resolution can adjust the lifting force to change the resolution of the measuring unit to adapt to the measurement in different gas flow ranges, and simultaneously can avoid the gas leakage in the measuring process to the greatest extent to ensure the measuring accuracy. Specifically, a pair of balanced gas collecting cavities (a first cavity gas collecting unit 9 and a second cavity gas collecting unit 11) can uninterruptedly exchange and collect and release gas to be measured through the left-right swinging of the middle pivot 8; the resolution of the gas measured by the first cavity gas collecting unit 9 and the second cavity gas collecting unit 11 is adjusted by the gravity regulator 6 and is preset before the gas flow is measured; the gas production counter 17 counts by rotation of the central pivot, in a manner that includes mechanical counting and sensor counting.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (8)
1. A micro gas flowmeter with adjustable resolution is characterized by comprising a closed container, an air inlet pipe, an air outlet pipe, a liquid medium, a central pivot, a balance groove body, a gravity regulator, a first cavity gas collection unit, a second cavity gas collection unit and a counter; the liquid medium is positioned in the closed container, the air inlet pipe is arranged at the lower part of the closed container, and the air outlet pipe is arranged at the upper part of the closed container; the center pivot penetrates through the center of the balance groove body, the balance groove body is arranged in the liquid medium in the closed container through the center pivot, the balance groove body can freely rotate relative to the closed container together with the center pivot, and the gravity regulator is arranged in the balance groove body and can freely slide along the balance groove body; the first cavity gas collecting unit and the second cavity gas collecting unit are connected together and reversely buckled at the lower side of the balance groove body and are respectively positioned at two sides of the central pivot, and the gas inlet of the gas inlet pipe is positioned below the joint of the first cavity gas collecting unit and the second cavity gas collecting unit; the counter is connected with the central pivot and is used for counting the rotation condition of the central pivot;
a first adjusting knob and a second adjusting knob are respectively arranged at two ends of the balance groove body;
the weight regulator is a sphere.
2. The micro gas flowmeter with the adjustable resolution ratio of claim 1, wherein the first cavity gas collecting unit and the second cavity gas collecting unit are formed by separating a lower surface of the balance tank body, a partition plate and a baffle plate, the lower surface of the balance tank body, the partition plate and the baffle plate are perpendicular to each other, the upper end of the partition plate is connected to the center line of the lower surface of the balance tank body, the two baffle plates are respectively connected to the front end and the rear end of the partition plate, and the upper ends of the two baffle plates are connected to the lower surface of the balance tank body.
3. The micro gas flow meter with adjustable resolution of claim 2, wherein the baffle is an inverted isosceles triangle, the isolation plate is connected at the midline of the baffle, and the lower end of the isolation plate is flush with the lower end of the baffle.
4. The tunable resolution trace gas flow meter according to claim 1, wherein the liquid medium is a liquid that does not dissolve gas.
5. The tunable resolution trace gas flow meter according to claim 1, wherein the liquid medium is water.
6. A resolution-adjustable trace gas flow meter according to claim 1, wherein a gas phase space is present within the containment vessel.
7. A tunable resolution micro gas flow meter according to any of claims 1-6, wherein the counter is a mechanical counter.
8. Resolution tunable trace gas meter according to any of claims 1 to 6, characterized in that the counter is a sensor counter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610645073.5A CN106092235B (en) | 2016-08-08 | 2016-08-08 | Micro gas flowmeter with adjustable resolution |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610645073.5A CN106092235B (en) | 2016-08-08 | 2016-08-08 | Micro gas flowmeter with adjustable resolution |
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| Publication Number | Publication Date |
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| CN106092235A CN106092235A (en) | 2016-11-09 |
| CN106092235B true CN106092235B (en) | 2023-02-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109029595B (en) * | 2018-09-13 | 2024-04-16 | 山东建华阀门制造有限公司 | Gas micro-flow metering device |
| US20230408471A1 (en) * | 2020-11-16 | 2023-12-21 | Nova Skantek Instruments (Beijing) Co, Ltd. | Gas measuring apparatus |
| CN112345707B (en) * | 2020-11-16 | 2021-10-29 | 湖南碧臣环境能源有限公司 | Gas measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB399863A (en) * | 1932-04-14 | 1933-10-16 | Charles Balfour Bramwell | Improvements in volumetric displacement meters |
| US4064750A (en) * | 1976-06-01 | 1977-12-27 | Speece Richard E | Gas flow totalizer |
| SE533578C2 (en) * | 2009-04-14 | 2010-10-26 | Bioprocess Control Sweden Ab | Device for measuring an ultra-low gas flow and a system for measuring biomethane gas flow and biogas flow with the device |
| US9073024B2 (en) * | 2012-07-16 | 2015-07-07 | Kristinn G. Drewry | Mixing bubble generator and installation configuration |
| CN205940667U (en) * | 2016-08-08 | 2017-02-08 | 碧普华瑞环境技术（北京）有限公司 | Micro - gas flowmeter of controlled resolution |
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