CN105466520A - Flow velocity and flow measurement device with pressure stabilizer and method thereof - Google Patents
Flow velocity and flow measurement device with pressure stabilizer and method thereof Download PDFInfo
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- CN105466520A CN105466520A CN201511016242.0A CN201511016242A CN105466520A CN 105466520 A CN105466520 A CN 105466520A CN 201511016242 A CN201511016242 A CN 201511016242A CN 105466520 A CN105466520 A CN 105466520A
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000005259 measurement Methods 0.000 title abstract description 13
- 239000003381 stabilizer Substances 0.000 title abstract 2
- 239000007788 liquid Substances 0.000 claims abstract description 57
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 14
- 238000007599 discharging Methods 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims description 16
- 230000009467 reduction Effects 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
- G01F23/16—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid
- G01F23/162—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid by a liquid column
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a flow velocity and flow measurement device with a pressure stabilizer and a method thereof. The flow velocity and flow measurement device is provided with a measuring port, a connecting pipe, an exhausting device, a pressure measurement device, a liquid level detection rod, a pressure stabilizing bucket, a pressure measurement box, a pressure measurement pipe, a water storage tank and a pipe orifice, wherein the liquid level detection rod is hollow, the measuring port is formed in one end of the liquid level detection rod, the other end of the liquid level detection rod is in airtight connection with the pressure measurement device through the connecting pipe, the pressure measurement device is used for measuring air pressure in the connecting pipe, and the exhausting device is connected with the connecting pipe and used for discharging liquid in the connecting pipe. The pressure stabilizing bucket covers the measuring port, a plurality of exhausting holes are formed in the top of the pressure stabilizing bucket, and a plurality of liquid inlet holes are formed in the lower portion of the pressure stabilizing bucket. The measuring port is formed in the water storage tank, and the water storage tank is provided with the pipe orifice. The flow velocity and flow measurement device is simple in structure, is applied to all of liquid pressure measurement and conversion, has universal applicability and is simple and convenient to operate, convenient to use and capable of achieve liquid level measurement.
Description
Technical field
The present invention relates to engineering survey and experimental apparatus, particularly relate to a kind of flow velocity with stable-pressure device and flow rate-measuring device and method thereof.
Background technology
The measurement of liquid level, in engineering field and experimental apparatus field, be the key element extensively existed, the metering of liquid level is one of ingredient of measuring science technology, and it and national economy, national defense construction, scientific research have close relationship.The convenience of level gauging and accuracy, to ensureing that the development of product quality, raising engineering throughput rate, the technology that advances science all has important effect.
Traditional mechanical liquid level is measured, and in the majority is directly survey to read, not enough to the convenience in space.Also have and read with carrying out survey by communicating pipe transfer, but may exist in communicating pipe and there is the problem such as carbonated drink combination, liquid-level pressure fluctuation shakiness, if there is the combination of its air water, then the data of the distortion that can lead to errors, pressure instability then may cause the consequence that reading is difficult and error is larger.In addition, current pick-up unit is more adopts accurate sensing element or probe, by this kind equipment Long term immersion in a liquid, its sensitivity must be caused to reduce gradually, ultimate failure.Thus cause component wear, whole equipment seriously may be caused to need overhaul or directly scrap.
Summary of the invention
The object of the invention is to solve problems of the prior art, and a kind of flow velocity with stable-pressure device and flow rate-measuring device are provided.Concrete technical scheme is as follows:
Flow velocity with stable-pressure device and a flow rate-measuring device, it comprises measures mouth, connecting pipe, exhaust apparatus, pressure tester, level detection bar, voltage stabilizing bucket, pressure measurement case, piezometric tube, reserve tank and ozzle; Level detection bar hollow, measure mouth and be opened in level detection bar one end, the level detection bar other end is connected by connecting pipe and pressure tester are airtight, and pressure tester is for measuring the air pressure in connecting pipe; Exhaust apparatus is connected with connecting pipe, for discharging the liquid in connecting pipe; Voltage stabilizing bucket covers in be measured outside mouth, and top offers several vent ports, and several inlet openings are offered in bottom; Pressure tester comprises pressure measurement case and piezometric tube, and pressure measurement case is airtight and communicate with described connecting pipe, and piezometric tube is vertically fixed on pressure measurement box top, and pipe end stretch enters in pressure measurement case, is marked with the liquid do not had bottom piezometric tube under using state in pressure measurement case; Measure mouth to be arranged in reserve tank, and with ozzle on reserve tank.
As preferably, described exhaust apparatus is air pump, air pump is communicated by pipeline with connecting pipe, and this section of pipeline is provided with valve, exhausr port is arranged on the pipeline between valve and air pump, exhausr port arranges standard: when measuring mouth and being placed in testing liquid and utilizing air pump to carry out discharge opeing, and the input tolerance of air pump is greater than the tolerance of discharging from exhausr port.
As further preferred, be provided with air pressure tank between described valve and air pump, described exhausr port is opened on air pressure tank.
Another object of the present invention is to provide a kind of flow velocity and the flow rate-measuring device method that use described device, step is as follows: first by valve open, and measurement mouth is put into a certain depth of testing liquid of reserve tank, gas in connecting pipe is discharged from exhausr port, to the liquid level H of piezometric tube after level stability
1measure; Open air pump again and carry out air-blowing to connecting pipe, will connect liquid in pipe and discharge, when the liquid level of piezometric tube tends towards stability, valve-off, to the liquid level H now treating piezometric tube
2carry out reading and be converted into liquid level H to be measured, reduction formula is as follows:
Wherein: ρ
1for testing liquid density, ρ
2for fluid density in pressure measurement case, g is acceleration of gravity;
Measure the difference in height Δ H of mouth and ozzle again, and become exit velocity v and the flow Q of ozzle according to following formula scales:
Wherein: μ
vand μ
qbe respectively aperture flow velocity and coefficient of flow, A is ozzle area.
Compared with prior art, tool has the following advantages in the present invention:
1) structure is simple, easy to operate, device can be applied to easily the level gauging worker flood of various liquid, applied widely.
2) intuitive measurement results is reliable, mechanically shows measurement result.
3) device does not need exact instrument, and main equipment is positioned at outside testing liquid, and it is very simple to immerse liquid part-structure, there is not the easily problem that declines of aging or inductive probe sensitivity of various parts in existing flow velocity and flow rate-measuring device.
Accompanying drawing explanation
Fig. 1 is a kind of flow velocity with stable-pressure device and flow rate-measuring device structural representation;
Fig. 2 is a kind of preferred form of pressure tester of the present invention;
Fig. 3 is a kind of preferred form of exhaust apparatus of the present invention.
In figure: measure mouth 1, connecting pipe 2, exhaust apparatus 3, pressure tester 4, level detection bar 5, voltage stabilizing bucket 6, pressure measurement case 7, piezometric tube 8, reserve tank 9, ozzle 10, air pump 301, valve 302 and air pressure tank 303.
Embodiment
Below in conjunction with drawings and Examples the present invention be further elaborated and illustrate.In the present invention, the technical characteristic of each embodiment is not having under conflicting prerequisite, all can carry out respective combination.
As shown in Figure 1, a kind of flow velocity with stable-pressure device and flow rate-measuring device, it comprises measures mouth 1, connecting pipe 2, exhaust apparatus 3, pressure tester 4, level detection bar 5 and voltage stabilizing bucket 6, pressure measurement case 7, piezometric tube 8, reserve tank 9 and ozzle 10; Level detection bar 5 hollow, measure mouth 1 and be opened in level detection bar 5 one end, level detection bar 5 other end is connected with pressure tester 4 is airtight by connecting pipe 2, and pressure tester 4 is for measuring the air pressure in connecting pipe 2; Exhaust apparatus 3 is connected with connecting pipe 2, for discharging the liquid in connecting pipe 2; Voltage stabilizing bucket 6 covers in be measured outside mouth 1, and top offers several vent ports, and several inlet openings are offered in bottom.Reserve tank 8, built with testing liquid, is measured mouth 1 and is arranged in reserve tank 9, and with ozzle 10 on reserve tank 9.
The principle of work of this device is as follows: first carry out record to pressure tester 4 pressure not placing feed liquor body, then measurement mouth 1 is goed deep into certain height of testing liquid, and in this stage, in connecting pipe 2, gas is constantly compressed, and produces pressure, and is recorded by pressure tester 4.When pressure level-off, by reading the relevant pressure of pressure tester 4, and deduct previous reading, thus obtain pressure differential, and be scaled liquid level.
In fact, in measuring process, the fluctuation of testing liquid can produce larger impact to final numerical value.In order to reduce this kind of impact, measuring on mouth 1 and can be provided with feeding pressure stabilizing device.The object of this device is by arranging damping layer, reduces the pressure surge that extraneous liquid fluctuation may cause measurement mouth 1.Voltage stabilizing bucket 6 in present embodiment is one is cylindrical shells that are cylindric or other shapes, covers in and measures outside mouth 1.
Measure mouth 1 can directly be connected with connecting pipe 2, but for the ease of operation, adopt the rigidity level detection bar 5 of hollow, be convenient to stretch in testing liquid, be also conducive to the stable of measuring process, can not change with the fluctuation of testing liquid.
Pressure tester 4 can adopt the multiple device that can realize barometric surveying, in present embodiment: pressure tester 4 is made up of pressure measurement case 7 and piezometric tube 8.As shown in Figure 2, pressure measurement case 7 is airtight and communicate with described connecting pipe 2, and piezometric tube 8 is vertically fixed on pressure measurement case 7 top, and pipe end stretch enters in pressure measurement case 7, is marked with the liquid do not had bottom piezometric tube 8 under using state in pressure measurement case 7.Piezometric tube 8 body is marked with scale, can carry out reading easily.Be marked with the liquid do not had bottom piezometric tube 8 under using state in pressure measurement case 7, when connecting pipe 2 internal gas pressure raises, by the liquid of pressure measurement case 7 press-in piezometric tube 8, can pressure reduction be obtained by scale change, thus conversion obtain testing liquid height.
Exhaust apparatus 3 can adopt various gas generating unit, as inflator, air pump etc.As shown in Figure 3, in present embodiment, exhaust apparatus 3 is air pump 301, air pump 301 is communicated by pipeline with connecting pipe 2, and this section of pipeline is provided with valve 302, exhausr port is arranged on the pipeline between valve and air pump 301, and exhausr port arranges standard and is: when measuring mouth 1 and being placed in testing liquid and utilizing air pump 301 to carry out discharge opeing, and the input tolerance of air pump 301 is greater than the tolerance of discharging from exhausr port.
Above-mentioned exhausr port is preferably opened on the cavity of rigidity, therefore can between valve 302 and air pump 301 between be provided with air pressure tank 303, described exhausr port is opened on air pressure tank 303.Air pressure tank 303 can play the effect of exhaust and voltage stabilizing simultaneously.
Based on said apparatus, a kind of flow velocity and the flow rate-measuring device method that use this device can be realized, it is characterized in that, step is as follows: first opened by valve 302, and measurement mouth 1 is put into a certain depth of testing liquid of reserve tank 9, gas in connecting pipe 2 is discharged from exhausr port, to the liquid level H of piezometric tube 8 after level stability
1measure; Open air pump 301 pairs of connecting pipes 2 again and carry out air-blowing, discharged by liquid in connecting pipe 2, when the liquid level of piezometric tube 8 tends towards stability, valve-off 302, to the liquid level H now treating piezometric tube 8
2carry out reading and be converted into liquid level H to be measured, reduction formula is as follows:
Wherein: ρ
1for testing liquid density, ρ
2for fluid density in pressure measurement case 7, g is acceleration of gravity;
Measure the difference in height Δ H of mouth 1 and ozzle 10 again, and become exit velocity v and the flow Q of ozzle 10 according to following formula scales:
Wherein: μ
vand μ
qbe respectively aperture flow velocity and coefficient of flow, A is ozzle area.
As can be seen here, the flow velocity of band stable-pressure device disclosed by the invention and flow rate-measuring device, structure is simple, and the scope of application can relate to measurement and the conversion of all liq pressure, has general applicability; And easy and simple to handle, easy to use, non-immediate formula and the digitizing of measuring liquid level can be realized.
Above-described embodiment is one of the present invention preferably scheme, and so it is not intended to limiting the invention, and all technical schemes taking the mode of equivalent replacement or equivalent transformation to obtain, all drop in protection scope of the present invention.
Claims (4)
1. a flow velocity with stable-pressure device and flow rate-measuring device, it is characterized in that, it comprises measures mouth (1), connecting pipe (2), exhaust apparatus (3), pressure tester (4), level detection bar (5), voltage stabilizing bucket (6), pressure measurement case (7), piezometric tube (8), reserve tank (9) and ozzle (10); Level detection bar (5) hollow, measure mouth (1) and be opened in level detection bar (5) one end, level detection bar (5) other end is connected with pressure tester (4) is airtight by connecting pipe (2), and pressure tester (4) is for measuring the air pressure in connecting pipe (2); Exhaust apparatus (3) is connected with connecting pipe (2), for discharging the liquid in connecting pipe (2); Voltage stabilizing bucket (6) covers in measures mouth (1) outward, and top offers several vent ports, and several inlet openings are offered in bottom; Pressure tester (4) comprises pressure measurement case (7) and piezometric tube (8), pressure measurement case (7) is airtight and communicate with described connecting pipe (2), piezometric tube (8) is vertically fixed on pressure measurement case (7) top, and pipe end stretch enters in pressure measurement case (7), under using state, in pressure measurement case (7), be marked with the liquid not having piezometric tube (8) bottom; Measure mouth (1) to be arranged in reserve tank (9), and with ozzle (10) on reserve tank (9).
2. flow velocity and the flow rate-measuring device being with stable-pressure device as claimed in claim 1, it is characterized in that, described exhaust apparatus (3) is air pump (301), air pump (301) is communicated by pipeline with connecting pipe (2), and this section of pipeline is provided with valve (302), exhausr port is arranged on the pipeline between valve and air pump (301), exhausr port arranges standard: when measuring mouth (1) and being placed in testing liquid and utilizing air pump (301) to carry out discharge opeing, and the input tolerance of air pump (301) is greater than the tolerance of discharging from exhausr port.
3. flow velocity and the flow rate-measuring device being with stable-pressure device as claimed in claim 2, it is characterized in that, be provided with air pressure tank (303) between described valve (302) and air pump (301), described exhausr port is opened on air pressure tank (303).
4. one kind uses flow velocity and the flow rate-measuring device method of device as claimed in claim 3, it is characterized in that, step is as follows: first opened by valve (302), and a certain depth of testing liquid that mouth (1) puts into reserve tank (9) will be measured, gas in connecting pipe (2) is discharged from exhausr port, to the liquid level H of piezometric tube (8) after level stability
1measure; Open air pump (301) again and air-blowing is carried out to connecting pipe (2), interior for connecting pipe (2) liquid is discharged, when the liquid level of piezometric tube (8) tends towards stability, valve-off (302), to the liquid level H now treating piezometric tube (8)
2carry out reading and be converted into liquid level H to be measured, reduction formula is as follows:
Wherein: ρ
1for testing liquid density, ρ
2for fluid density in pressure measurement case (7), g is acceleration of gravity;
Measure the difference in height Δ H of mouth (1) and ozzle (10) again, and become exit velocity v and the flow Q of ozzle (10) according to following formula scales:
Wherein: μ
vand μ
qbe respectively aperture flow velocity and coefficient of flow, A is ozzle area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511016242.0A CN105466520A (en) | 2015-12-29 | 2015-12-29 | Flow velocity and flow measurement device with pressure stabilizer and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511016242.0A CN105466520A (en) | 2015-12-29 | 2015-12-29 | Flow velocity and flow measurement device with pressure stabilizer and method thereof |
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| CN105466520A true CN105466520A (en) | 2016-04-06 |
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| CN201511016242.0A Pending CN105466520A (en) | 2015-12-29 | 2015-12-29 | Flow velocity and flow measurement device with pressure stabilizer and method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486391A (en) * | 2010-12-03 | 2012-06-06 | 吕武轩 | Bubble type automatic proportion correction liquid level meter |
| CN102829845A (en) * | 2011-06-15 | 2012-12-19 | 无锡尚德太阳能电力有限公司 | Float-type liquid level display device and photovoltaic manufacturing process device |
| CN202648738U (en) * | 2012-05-13 | 2013-01-02 | 钟祥凯龙楚兴化工有限责任公司 | Air blowing type liquid level meter |
| CN104766513A (en) * | 2015-04-01 | 2015-07-08 | 浙江大学 | Pressure signal flow measurement device and flow measurement method |
| CN204680277U (en) * | 2015-06-02 | 2015-09-30 | 浙江大学 | A kind of piston type momentum testing equipment possessing teaching efficiency flow digital display |
-
2015
- 2015-12-29 CN CN201511016242.0A patent/CN105466520A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486391A (en) * | 2010-12-03 | 2012-06-06 | 吕武轩 | Bubble type automatic proportion correction liquid level meter |
| CN102829845A (en) * | 2011-06-15 | 2012-12-19 | 无锡尚德太阳能电力有限公司 | Float-type liquid level display device and photovoltaic manufacturing process device |
| CN202648738U (en) * | 2012-05-13 | 2013-01-02 | 钟祥凯龙楚兴化工有限责任公司 | Air blowing type liquid level meter |
| CN104766513A (en) * | 2015-04-01 | 2015-07-08 | 浙江大学 | Pressure signal flow measurement device and flow measurement method |
| CN204680277U (en) * | 2015-06-02 | 2015-09-30 | 浙江大学 | A kind of piston type momentum testing equipment possessing teaching efficiency flow digital display |
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Effective date of registration: 20170204 Address after: 310027 Hangzhou, Zhejiang Province, Xihu District, Zhejiang Road, No. 38, No. Applicant after: Zhejiang University Address before: 310027 Hangzhou, Zhejiang Province, Xihu District, Zhejiang Road, No. 38, No. Applicant before: Zhejiang University Applicant before: Wu Haijun |
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Application publication date: 20160406 |