CN113916317A - Constant-pressure gas volume measuring device - Google Patents
Constant-pressure gas volume measuring device Download PDFInfo
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- CN113916317A CN113916317A CN202111221014.2A CN202111221014A CN113916317A CN 113916317 A CN113916317 A CN 113916317A CN 202111221014 A CN202111221014 A CN 202111221014A CN 113916317 A CN113916317 A CN 113916317A
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- gas
- measuring cylinder
- cylinder
- sliding block
- measuring device
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- 239000007788 liquid Substances 0.000 claims abstract description 49
- 239000000696 magnetic material Substances 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 11
- 239000007789 gas Substances 0.000 description 50
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Sampling And Sample Adjustment (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a constant-pressure gas volume measuring device, which comprises a decomposition system and a measuring system, wherein the measuring system comprises a gas measuring cylinder, the upper end of the gas measuring cylinder is connected with the decomposition system, the lower end of the gas measuring cylinder is connected with a hose to form a U-shaped bend, and liquid is filled in the gas measuring cylinder; a floating barrel is arranged in the air measuring barrel, and floats on the liquid level in the air measuring barrel; the sliding block is coaxially and movably sleeved outside the air measuring cylinder, and the sliding block and the floating cylinder are magnetically adsorbed to enable the sliding block and the floating cylinder to move together; the other end of the hose is fixed on the sliding block, and the overflow liquid level of the hose is horizontal to the liquid level in the air measuring cylinder. According to the invention, the volume of the gas is measured by using a drainage method, the slide block and the buoy in the measuring device are magnetically adsorbed, the overflow liquid level of the U-shaped bend and the liquid level of the gas measuring cylinder are reduced together, the liquid level at two ends of the U-shaped bend can be ensured, the pressure in the gas measuring cylinder is constant, and the volume of trace gas can be accurately measured.
Description
Technical Field
The invention relates to the technical field of gas volume measurement, in particular to a constant-pressure gas volume measuring device.
Background
Often relate to gaseous product during decomposition experimental study, need measure the gaseous volume of product, under the general condition, the industry adopts gas flowmeter to measure gas volume, for example orifice plate flowmeter, gas output is very low and gas output receives reaction condition and time influence scope broad when the laboratory carries out the decomposition experiment, it is very big to carry out measurement error with conventional flowmeter, the laboratory adopts drainage method to measure usually at present, need pay attention to the curved both ends liquid level holding level of U type in the measurement process, otherwise can lead to gaseous pressure not to be equal to atmospheric pressure, thereby influence measuring accuracy. At present, the liquid level of the U-shaped bend needs to be manually controlled, which is tedious and the accuracy of the measurement result has a large relationship with human factors, therefore, the Chinese invention patent CN201920002529.5 provides an experimental device for measuring the h2o2 decomposition reaction rate constant, the device controls the lifting of the other end of the U-shaped tube through the pressure of a gas generation part, the method realizes automation and reduces the labor amount, but in the actual use process, the lifting amplitude of the lifting device is difficult to be well matched with the gas generation rate, therefore, the motor of the device can be frequently started and stopped to cause the overheating of the device, the failure rate is high, in addition, the device is influenced by inertia, a level bottle on the lifting device moves from time to time, the liquid level at the two ends of the U-shaped bend is difficult to keep always horizontal, the pressure in a gas measuring cylinder fluctuates all the time, and the accuracy of the test is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a constant-pressure gas volume measuring device which is used for accurately measuring the volume and the flow of trace gas.
In order to achieve the purpose, the invention is realized by the following technical scheme: a constant-pressure gas volume measuring device comprises a gas measuring cylinder, wherein a gas inlet is formed in the upper end of the gas measuring cylinder, the lower end of the gas measuring cylinder is connected with a hose to form a U-shaped bend, liquid is filled in the gas measuring cylinder, a floating barrel is arranged in the gas measuring cylinder, and the floating barrel floats on the liquid level in the gas measuring cylinder; the sliding block is coaxially and movably sleeved outside the air measuring cylinder, and the sliding block and the floating cylinder are magnetically adsorbed to enable the sliding block and the floating cylinder to move together; the other end of the hose is fixed on the sliding block, and the overflow liquid level of the liquid in the hose is horizontal to the liquid level in the air measuring cylinder.
In one embodiment of the present invention, there are many ways to magnetically attract the slider and the float, for example, the slider is a magnet, and the float is iron or a magnet, but the float may be made of other magnetic materials that can attract the magnet. Preferably, the slider and the buoy are both magnets, and the adsorption capacity of the slider and the buoy is stronger. For the form of the buoy, the whole buoy can be made of the same material, and the buoy can be divided into a plurality of sections made of different materials.
As an embodiment of the present invention, the measuring apparatus further includes a guide rod disposed in parallel with the gas measuring cylinder for guiding the slider to move in the axial direction of the gas measuring cylinder. There are many ways to guide the slider along the guide rod, such as providing a through hole in the slider through which the guide rod passes, or providing a keyway connection between the guide rod and the slider.
As an embodiment of the invention, the guide rod is provided with a plurality of guide rods, so that the moving direction of the slide block can be controlled more strictly, the slide block is prevented from rotating in the horizontal direction, and the friction between the slide block and the outer wall of the gas measuring cylinder, which may exist, is reduced.
As an embodiment of the invention, the liquid outlet end of the hose is communicated with a hard hollow pipe, and the hard hollow pipe is fixed on the sliding block. The hard hollow pipe is arranged, so that the fixing can be facilitated, and the situation that the hose is pressed to influence the liquid circulation when the hose is directly fixed is avoided.
As an embodiment of the present invention, a section of the hard hollow tube extends along the axial direction of the gas measuring cylinder and is detachably fixed to the slider, and the height of the overflow liquid level of the hose is adjusted by changing the fixing position between the hard hollow tube and the slider. Furthermore, the hard hollow pipe is an L-shaped pipe, the end port of the liquid outlet end of the hose is arranged above and is connected with one end of the L-shaped pipe, and the other end of the L-shaped pipe extends towards the outer side of the sliding block, so that liquid in the hose is prevented from overflowing to the sliding block.
In one embodiment of the present invention, the flexible tube has a plurality of flexible tubes symmetrically arranged along the sliding block.
In one embodiment of the invention, the measuring device is further provided with a plurality of weighting blocks, the weighting blocks are placed on the sliding blocks, and the overflow liquid level of the flexible pipe is adjusted to be level with the liquid level in the gas measuring cylinder by increasing or decreasing the number of the weighting blocks.
The invention has the following beneficial effects:
according to the invention, the volume of the gas is measured by using a drainage method, the slider and the buoy in the measuring device are magnetically adsorbed, the overflow liquid level of the U-shaped bend and the liquid level of the gas measuring cylinder are reduced together, the liquid level at two ends of the U-shaped pipe can be ensured, the pressure in the gas measuring cylinder is constant, and the volume of trace gas can be accurately measured.
Drawings
FIG. 1 is a schematic diagram of an experimental setup for measuring the rate constant of decomposition reaction of h2o2, comprising a measuring device according to the present invention;
FIG. 2 is a schematic structural diagram of a measuring device according to an embodiment of the present invention;
FIG. 3 is a schematic view of a partial structure of a measuring device according to an embodiment of the present invention;
FIG. 4 is a schematic view of a buoy structure according to an embodiment of the present invention;
in the figure, 1, a constant temperature magnetic stirrer; 2. a reaction bottle; 3. a support; 4. a gas measuring cylinder; 5. a hose; 6. a slider; 7. a guide bar; 8. a float bowl; 51. a hard hollow tube; 81. an upper section; 82. a lower section.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1, fig. 1 is a schematic structural diagram of an experimental apparatus for measuring the H2O2 decomposition reaction rate constant, which includes the measurement apparatus, and the gas source of the experimental apparatus is from a H2O2 decomposition system. The measuring device is used for measuring the gas production rate of the H2O2 decomposition reaction. The decomposition system comprises a constant-temperature magnetic stirrer 1 and a reaction bottle 2, wherein the reaction bottle 2 is positioned in the constant-temperature magnetic stirrer 1, and the gas phase part of the reaction bottle 2 is communicated with the measuring device. During the experiment, hydrogen peroxide solution is filled in a reaction bottle, and the reaction temperature is controlled by a constant-temperature magnetic stirrer.
Referring to fig. 2 and 3, the measuring device includes a bracket 3 and a gas measuring cylinder 4, wherein the gas measuring cylinder 4 is vertically arranged and fixed on the bracket 3; the upper end of the gas measuring cylinder 4 is connected with the reaction bottle 1 in a gas phase mode, the lower end of the gas measuring cylinder is connected with the two hoses 5 to form a U-shaped bend, liquid is filled into the gas measuring cylinder 4, the gas measuring cylinder 4 is internally provided with a floating barrel 8, and the floating barrel 8 floats on the liquid level in the gas measuring cylinder 1; the slide block 6 is coaxially and movably sleeved outside the air measuring cylinder 4, and the slide block 6 is made of a magnetic material and magnetically adsorbed and moves together with the floating cylinder 8; liquid outlets at the other ends of the two hoses 5 are symmetrically fixed on the sliding block 6, and the overflow liquid level of the hoses 5 is horizontal to the liquid level in the air measuring cylinder 4. After the gas generated by the decomposition system enters the gas measuring cylinder, the liquid in the gas measuring cylinder overflows and is discharged outside through the hose, the liquid level in the gas measuring cylinder is reduced, the hose is driven by the sliding block to be reduced together, and the liquid levels on two sides of the U-shaped bend are kept equal in the whole process, so that the constant pressure in the gas measuring cylinder 4 is ensured. Two guide rods 7 are further fixed on the support 3, the guide rods 7 are arranged in parallel with the air measuring cylinder 4, through holes matched with the guide rods 7 are formed in the sliding blocks, and the guide rods 7 penetrate through the through holes to be connected with the sliding blocks 6 in a sliding mode, so that the sliding blocks are limited to shake, and friction between the sliding blocks and the outer wall of the air measuring cylinder 4 is avoided.
Specifically, the end of the hose 5 is connected with a hard hollow pipe 51, one section of the hard hollow pipe 51 extends along the axial direction of the gas measuring cylinder 4, the section is detachably fixed on the sliding block 6, the overflow liquid level of the hose is adjusted by changing the fixing position between the hard hollow pipe 51 and the sliding block 6, in addition, the hard hollow pipe 51 is an L-shaped pipe, the end port of the liquid outlet end of the hose 5 is arranged above and is connected with one end of the L-shaped pipe, the other end of the L-shaped pipe extends towards the outer side of the sliding block 6, and the liquid in the hose is prevented from overflowing onto the sliding block 6.
Referring to fig. 4, the buoy 8 is formed by connecting an upper section 81 and a lower section 82, and the two sections are connected to form a hollow closed structure so that the buoy can float on the liquid surface. The upper section 81 is made of magnetic material to increase the attraction force with the slider 6, and the lower section 82 is made of non-magnetic material. When the gas measuring cylinder is used, the upper section 81 is positioned above the lower section 82, the lower section 82 of the buoy 8 is partially immersed in liquid, and the slide block 6 and the upper section 81 adsorb the liquid and then adjust the pipe orifice of the hollow pipe 51 to be level with the liquid level in the gas measuring cylinder 4.
In addition, the device is also provided with a plurality of weighting blocks (not shown in the figure), the weighting blocks are arranged on the sliding block 6, the overflow liquid level of the flexible pipe 5 can be adjusted to be level with the liquid level in the gas measuring cylinder 4 by increasing or decreasing the number of the weighting blocks, and the position of the weighting blocks on the sliding block 6 can also be adjusted to enable the overflow liquid levels of the plurality of flexible pipes 5 to be level, so that the adjustment of a single hard hollow pipe 51 for multiple times is avoided, and the workload is reduced.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A constant pressure gas volume measuring device comprises a gas measuring cylinder, wherein the upper end of the gas measuring cylinder is provided with a gas inlet, the lower end of the gas measuring cylinder is connected with a hose to form a U-shaped bend, and liquid is filled in the gas measuring cylinder,
a floating barrel is arranged in the gas measuring barrel, and floats on the liquid level in the gas measuring barrel; the sliding block is coaxially and movably sleeved outside the air measuring cylinder, and the sliding block and the floating cylinder are magnetically adsorbed to enable the sliding block and the floating cylinder to move together; the other end of the hose is fixed on the sliding block, and the overflow liquid level of the hose is horizontal to the liquid level in the air measuring cylinder.
2. The constant pressure gas volume measuring device according to claim 1, wherein the float and the slider are made of magnetic material.
3. The constant-pressure gas volume measuring device as claimed in claim 1, further comprising a guide bar disposed in parallel with the measuring cylinder for guiding the slider to move in the axial direction of the measuring cylinder.
4. The constant-pressure gas volume measuring device as claimed in claim 4, wherein the guide bar has a plurality of pieces.
5. The constant pressure gas volume measuring device according to claim 1, wherein the outlet end of the flexible tube is connected to a rigid hollow tube, and the rigid hollow tube is fixed on the sliding block.
6. The constant pressure gas volume measuring device according to claim 5, wherein a section of the hard hollow tube extends in the axial direction of the gas measuring cylinder and is detachably fixed to the slider, and the overflow level of the hose is adjusted by changing the fixing position between the hard hollow tube and the slider.
7. The constant-pressure gas volume measuring device as claimed in claim 6, wherein the rigid hollow tube is an L-shaped tube, the outlet end of the hose is over and connected with one end of the L-shaped tube, and the other end of the L-shaped tube extends to the outside of the sliding block to prevent the liquid in the hose from overflowing to the sliding block.
8. The constant pressure gas volume measuring device according to claim 1, wherein the flexible tube has a plurality of pieces and is symmetrically arranged along the slider.
9. The constant pressure gas volume measuring device according to any one of claims 1 to 8, wherein a plurality of weight blocks are provided, the weight blocks are placed on the slide block, and the amount of the weight blocks is increased or decreased to adjust the overflow level of the flexible tube to be equal to the liquid level in the gas measuring cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111221014.2A CN113916317B (en) | 2021-10-20 | 2021-10-20 | Constant-pressure gas volume measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111221014.2A CN113916317B (en) | 2021-10-20 | 2021-10-20 | Constant-pressure gas volume measuring device |
Publications (2)
| Publication Number | Publication Date |
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| CN113916317A true CN113916317A (en) | 2022-01-11 |
| CN113916317B CN113916317B (en) | 2024-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111221014.2A Active CN113916317B (en) | 2021-10-20 | 2021-10-20 | Constant-pressure gas volume measuring device |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU257786A1 (en) * | К. А. Корепанов | PRESSURE GASOMETER | ||
| GB1179832A (en) * | 1966-01-24 | 1970-02-04 | Johnson Matthey Co Ltd | Apparatus for recording the progress of a chemical reaction |
| US6253611B1 (en) * | 1996-05-11 | 2001-07-03 | Seetru Limited | Magnetic float type liquid level gauges |
| CA2451939A1 (en) * | 2003-12-23 | 2005-06-23 | Greg Mcgillis | A linear position sensor utilizing time domain reflectometry and magnetic repulsion |
| CN202748091U (en) * | 2012-08-31 | 2013-02-20 | 王发应 | Gas molar volume measuring device |
| CN204165625U (en) * | 2014-10-21 | 2015-02-18 | 四川交通职业技术学院 | A kind of coding-belt tank gage |
| CN205580554U (en) * | 2016-05-03 | 2016-09-14 | 青岛科技大学 | Measure device of gaseous output |
| CN207096030U (en) * | 2017-06-27 | 2018-03-13 | 沈阳化工股份有限公司 | A kind of gas volume measurement apparatus |
| CN207300350U (en) * | 2017-10-24 | 2018-05-01 | 三峡大学 | A kind of drainage measures gas volume device |
| CN208766072U (en) * | 2019-01-02 | 2019-04-19 | 西南石油大学 | A kind of experimental provision measuring H2O2 decomposition reaction rate constant |
-
2021
- 2021-10-20 CN CN202111221014.2A patent/CN113916317B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU257786A1 (en) * | К. А. Корепанов | PRESSURE GASOMETER | ||
| GB1179832A (en) * | 1966-01-24 | 1970-02-04 | Johnson Matthey Co Ltd | Apparatus for recording the progress of a chemical reaction |
| US6253611B1 (en) * | 1996-05-11 | 2001-07-03 | Seetru Limited | Magnetic float type liquid level gauges |
| CA2451939A1 (en) * | 2003-12-23 | 2005-06-23 | Greg Mcgillis | A linear position sensor utilizing time domain reflectometry and magnetic repulsion |
| CN202748091U (en) * | 2012-08-31 | 2013-02-20 | 王发应 | Gas molar volume measuring device |
| CN204165625U (en) * | 2014-10-21 | 2015-02-18 | 四川交通职业技术学院 | A kind of coding-belt tank gage |
| CN205580554U (en) * | 2016-05-03 | 2016-09-14 | 青岛科技大学 | Measure device of gaseous output |
| CN207096030U (en) * | 2017-06-27 | 2018-03-13 | 沈阳化工股份有限公司 | A kind of gas volume measurement apparatus |
| CN207300350U (en) * | 2017-10-24 | 2018-05-01 | 三峡大学 | A kind of drainage measures gas volume device |
| CN208766072U (en) * | 2019-01-02 | 2019-04-19 | 西南石油大学 | A kind of experimental provision measuring H2O2 decomposition reaction rate constant |
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| Publication number | Publication date |
|---|---|
| CN113916317B (en) | 2024-05-24 |
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