CN209623823U - Suspended body flowmeter - Google Patents
Suspended body flowmeter Download PDFInfo
- Publication number
- CN209623823U CN209623823U CN201821597162.8U CN201821597162U CN209623823U CN 209623823 U CN209623823 U CN 209623823U CN 201821597162 U CN201821597162 U CN 201821597162U CN 209623823 U CN209623823 U CN 209623823U
- Authority
- CN
- China
- Prior art keywords
- flowmeter
- float
- inner housing
- suspended body
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Measuring Volume Flow (AREA)
Abstract
A kind of suspended body flowmeter, it is characterized in that, it include: flowmeter bodies, it is with inner housing, outer housing, air inlet, exhaust outlet, wherein the outer housing surrounds the inner housing, and gas passes sequentially through the air inlet, the inner housing, the outer housing, the exhaust outlet and flows through the flowmeter bodies；Float is located in the accommodating space of the inside of the inner housing, and can move in the flowmeter bodies under the action of through the gas of the flowmeter bodies, and the float has magnetic portion；Hall element is located on the side wall of the inner housing of the flowmeter bodies, the position of the magnetic portion for detecting the float.
Description
Technical field
This application involves gas flow surveying instrument, in particular to a kind of dress of digital collection bedside oxygen flow
It sets.
Background technique
Currently, there are two main classes for the device for measuring patient bed head oxygen flow in the market, one is mechanical floats
Flowmeter, one kind are electronic type oxygen flow meters:
The first kind is mechanical oxygen flow meter, using mechanical device, estimates gas instantaneous flow by simple scale label,
It cannot achieve the effect that precise measurement, especially small-flow gas cannot accurately be measured.It is less able to achieve digitized measurement,
The purpose of digital management is not able to satisfy the requirements of the times of digital hospital.
Second class is heated type thermistor bridge flow sensor, and using a heater strip is set in gas circuit, two sides are installed respectively
Thermistor, when there is air-flow to pass through, since thermistor change in resistance in electric bridge obtains defeated so as to cause electric bridge imbalance
Sampled voltage out, the variation of oxygen flow at reaction, this device power consumption is big, and manufacturing cost is high, is not suitable for popularity.
Therefore, it is necessary to provide a kind of new-type suspended body flowmeter, disadvantages described above is able to solve or at least partly overcome.
Utility model content
The purpose of this technology is to overcome the defect of above-mentioned flow sensor, provides a kind of measurement accuracy height, and measurement result is steady
Fixed, low cost low-power consumption is advantageously implemented the digitized gas flow sensor of metering.
The suspended body flowmeter of the application includes sensor inner sleeve, float, magnetic core and Hall element, constitutes the core of sensor
Component；Sensor housing, limiting card, oxygen flow meter interface, oxygen air inlet, oxygen gas outlet etc. form sensor appendix
Part.Hall element is located at the outside of inner sleeve Taper Pipe, in the quiescent state guarantee with the N of magnetic core it is extremely nearest at a distance from, the installation of limiting card
Distance of the position in 1 core length in the top of Hall element；The output lead of Hall element should pass through the side of sensor housing
Wall is drawn.
According to a kind of suspended body flowmeter of the application characterized by comprising flowmeter bodies, with inner housing, outside
Shell, air inlet, exhaust outlet, wherein the outer housing surrounds the inner housing, gas pass sequentially through the air inlet, it is described in
Shell, the outer housing, the exhaust outlet flow through the flowmeter bodies；Float is located at the appearance of the inside of the inner housing
In between emptying, and it can be moved in the flowmeter bodies under the action of through the gas of the flowmeter bodies, it is described
Float has magnetic portion；Hall element is located on the side wall of the inner housing of the flowmeter bodies, for detecting the float
Magnetic portion position.
Preferably, suspended body flowmeter further includes Position Keeper comprising: vacuum tube；Mercury is located at the vacuum tube
In and occupy a part of space inside the vacuum tube；Electrode runs through the vacuum tube, is electrically connected to the Hall member
Part, and there is an output end；Wherein, when the suspended body flowmeter is located at vertical position, the mercury is in the vacuum tube
Position the electrode is switched on, when the suspended body flowmeter is inclined by or is inverted, the mercury is in the vacuum tube
In position the electrode is disconnected.
Preferably, for the inner housing in air inlet compared with fine taper, cone angle is 3-4 °；The float is cylindrical, the magnetism
Portion is located at the diameter maximum of the float, and the maximum gauge of the float makes, when the float is not by the work of gas
When firmly, the float is rested in the flowmeter bodies.
Preferably, according to use environment it is expected that the use position of the float 3 in a state of use, the Hall element 4
It is arranged at the same level height using position.
Preferably, the suspended body flowmeter further include: gas supply device, with air inlet pipe, exhaust pipe；Wherein, institute
The air inlet that air inlet pipe is connected to the flowmeter bodies is stated, the exhaust pipe is connected to the exhaust outlet of the flowmeter bodies.
The technical solution of the application gas flow sensor is described in detail below with reference to embodiment.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the application.
Reference signs list:
1 flowmeter bodies
11 outer housings
12 inner housings
2 gas supply devices
21 air inlet pipe
22 exhaust pipes
23 flowmeter interfaces
3 floats
4 Hall elements
5 Position Keepers.
Specific embodiment
Embodiments herein is specifically described referring to the drawings.
Fig. 1 shows one embodiment of the suspended body flowmeter of the application.As shown, on the whole, according to the application's
Suspended body flowmeter includes: flowmeter bodies 1, gas supply device 2, float 3, Hall element 4, Position Keeper 5.
Flowmeter bodies 1 are described first.Flowmeter bodies 1 have inner housing 12, air inlet, exhaust outlet.In use, gas
Body is passed directly into inner housing 12, is measured by the float 3 in inner housing 12 to gas.
Flowmeter bodies 1 can also include outer housing 11.Outer housing 11 is enclosed in outside inner housing 12, and gas is from air inlet
Mouth enters in inner housing 12, by float 3, is discharged into outer housing 11 from inner housing 12, then be discharged by outer housing 12
Port.That is, gas, which passes sequentially through air inlet, inner housing 12, outer housing 11, exhaust outlet, passes through flowmeter bodies 1.Pass through
Such structure can make the air pressure in flowmeter bodies 1 more stable, and air-flow is gentler, to be conducive to accurate meter gaseous.
Outer housing 11 can be cylindrical in shape, and inner housing 12 can be cylindrical in shape or cone cell.In use, outer housing 11 and inner housing
12 vertical placements, the diameter of inner housing 12 can gradually decrease from top to bottom at this time.
Next description gas supply device 2.Gas supply device 2 its with air inlet pipe 21, exhaust pipe 22.Wherein, into
Tracheae 21 is connected to the air inlet of flowmeter bodies 1, and exhaust pipe 22 is connected to the exhaust outlet of flowmeter bodies 1.
Next description float 3.Float 3 is located in the accommodating space of the inner housing 12 of flowmeter bodies 1, and can be logical
It under the action of the gas of overcurrent meter ontology 1, is moved in flowmeter bodies 1, float 3 has magnetic portion.
One end of float 3 can be tapered, in this way, float 3 can rest in interior in the case where inner housing 12 is tapered
The a certain position of shell 12.
Next description Hall element 4.Hall element 4 is located on the side wall of the inner housing 12 of flowmeter bodies 1, for examining
Survey the position of the magnetic portion of float 3.As it is known by the man skilled in the art, Hall element 4 can detecte the variation of magnetic flux.This Shen
Please Hall element 4 is arranged on the side wall of inner housing 12, in this way, with existing skill that Hall element is arranged in flowmeter bottom
Art is compared, and when the change in location of the magnet of float 3, Hall element 4 can be more sensitive, quasi- for the measurement of the location variation
Really.
In the embodiment of the gas flowmeter of this technology, when flowing in flowmeter bodies 1 without gas, float 3 is quiet
It only is parked in the lower end of inner housing 12, inner housing 12 is closed.When there is gas to flow through inner housing 12 from bottom to top, gas is floated
Son 3 shuts off, to generate pressure on float 3, this pressure forces float 3 to rise, thus increase gas actual internal area,
The gas pressure in inner housing 12 is caused to reduce, float 3 is fallen after rise.When the gas pressure in inner housing 12 is equal to the weight of float 3
When, float 3 is in equilibrium state, and at this moment 3 position of float produces a upward vertical displacement, this displacement will make Hall magnetic
The output voltage of element 4 changes, and collected variation voltage signal is exported by signal wire, to obtain the flow number of gas
According to.
Next description Position Keeper 5.Position Keeper 5 includes: vacuum tube；Mercury is located in vacuum tube and accounts for
According to a part of space inside vacuum tube；Electrode runs through vacuum tube, is electrically connected to Hall element 4, and has an output
End.Wherein, when suspended body flowmeter is located at vertical position, position of the mercury in vacuum tube is switched on electrode, works as float
When flowmeter is inclined by or is inverted, position of the mercury in the vacuum tube is disconnected electrode.
In one embodiment, the inner housing 11 of the flowmeter bodies 1 of the suspended body flowmeter of the application is lesser in lower end
Taper, and at least at the position that inner housing 11 corresponds to Hall element 4, the cone angle of inner housing 11 is 3-4 °.Pass through inner housing
11 cone angle is equipped with the Hall element 4 in side, can more accurately measure the flow of gas.
It is the calculation method of the cone angle of the inner housing 11 of the flowmeter bodies 1 of the suspended body flowmeter of the application below.
1. lower mouth (inlet port) diameter of inner housing 11
The minimum of inner housing 11 opens radius R1, closes between radius R0, lower mouth ventilation sectional area S0 and meet relational expression:
S0=π × R1 2-π×R0 2；
In view of will be with existing spinner flowmeter interface compatibility, therefore it be 9.4mm that lower mouth, which closes diameter, and lower mouth closes radius
R0=9.4mm/2=4.7mm, it is 9.41mm (being the attainable precision of current grinding tool energy) that minimum, which opens diameter, and minimum opens half
Diameter R1=9.41mm/2=4.705mm
The relationship of (outlet port) 2. suitable for reading between diameter and lower port diameter
According to flowmeter clinical demand, minimum is 0.1 liter/min by flow, according to medical bedside flowmeter max-flow
Amount demand is generally not less than 10 liters/min, and maximum stream flow is about 100 times of minimum discharge.Therefore, by unit when ventilation
The pressure of area and the constant calculating of the gas volume passed through, ventilation sectional area S suitable for reading1With lower mouth sectional area S0Between meet relationship
Formula:
S1=100 × S0
Maximum ventilation sectional area S1, maximum open radius R2, ventilation sectional area S suitable for reading1Between meet relational expression:
S1=π × R2 2-π×R0 2=100 × (π × R1 2-π×R0 2)
3. the length of inner housing 11
Hall stroke L=2 × service area, the 49e type Hall element that preferred embodiment of the present application uses effectively are made
With area=4.5mm, therefore L=9mm.
4. the cone angle of inner housing 11
The cone angle of inner housing 11 is α, then the gradient of inner housing 11 is tg α=(R2-R1)/L
Again by R2Formula substitute into, obtain the calculation formula of cone angle:
Or
Wherein:
The cone angle of α=inner housing 11
R0The lower radius of=inner housing 11
R1The lower part minimum of=inner housing 11 opens radius
L=Hall stroke
Substitute into the numerical value in preferred embodiment of the present application:
R0=4.7mm
R1=4.705mm
L=9mm
It is calculated:
α=0.05556 tg
α=3.18 °
According to practical application, cone angle can be 3-4 °.
In the embodiment of the gas flow sensor of the application, when gas flowmeter is in correct installation site,
Mercury in vacuum tube is located at the bottom of vacuum tube, and the electrode of vacuum bottom of the tube is contacted with mercury, so that two electrodes are connected, gas
The signal of flowmeter can normally be output to outside.And lay flat, be inverted or when incorrect installation site when gas flowmeter is in,
Since float 3 can be moved freely in intraspinal tube, the flow signal of 4 output error of Hall element is caused, however at this moment mercury has been
It is detached from vacuum bottom of the tube, so that two electrodes disconnect, cannot be output to from the flow signal of 4 output error of Hall element by electrode
Outside, to reach only in correct installation site, electromagnetic float type gas flowmeter just has the purpose of data output.
Preferably, the use position of float 3 in a state of use can be estimated according to the use environment of gas flowmeter in advance
It sets, Hall element 4 is arranged at the same level height for using position with this.In this way, Hall element 4 is for gas flow
Metering will be more accurate.
Preferably, according to the gas flowmeter of the application, wherein float 3 is upper end outer diameter 9.5mm, outside the lower end internal diameter 6mm
The hollow round table shape component of diameter 8mm, internal diameter 6mm high 10mm, inside inlay the magnet of diameter 6mm high 9mm.
Preferably, according to the gas flowmeter of the application, wherein the float uses plastics, embedded magnet is bonded
Together.
Preferably, according to the gas flowmeter of the application, wherein outer housing 11, inner housing 12, float 3, magnetic core are all made of
Plastics are made.
The gas flow sensor of this technology is beneficial to be had the technical effect that due to can be with voltage system by gas flow shape
State output, measurement accuracy will be greatly improved than traditional suspended body flowmeter, and measurement result is stablized, and be advantageously implemented metering number
Change, the purpose of hospital management digital management becomes a kind of regeneration product of gas flowmeter of good performance.
Claims (5)
1. a kind of suspended body flowmeter characterized by comprising
Flowmeter bodies, with inner housing, outer housing, air inlet, exhaust outlet, wherein the outer housing surrounds the inner casing
Body, gas pass sequentially through the air inlet, the inner housing, the outer housing, the exhaust outlet and flow through the flowmeter bodies；
Float is located in the accommodating space of the inside of the inner housing, and can be in the gas by the flowmeter bodies
Under the action of, it is moved in the flowmeter bodies, the float has magnetic portion；
Hall element is located on the side wall of the inner housing of the flowmeter bodies, for detecting the magnetic portion of the float
Position.
2. suspended body flowmeter according to claim 1, which is characterized in that further include Position Keeper comprising:
Vacuum tube；
Mercury is located in the vacuum tube and occupies a part of space inside the vacuum tube；
Electrode runs through the vacuum tube, is electrically connected to the Hall element, and have an output end；
Wherein, when the suspended body flowmeter is located at vertical position, position of the mercury in the vacuum tube makes described
Electrode is switched on, and when the suspended body flowmeter is inclined by or is inverted, position of the mercury in the vacuum tube makes institute
Electrode is stated to be disconnected.
3. suspended body flowmeter according to claim 1, it is characterised in that:
For the inner housing in air inlet compared with fine taper, cone angle is 3-4 °；
The float is cylindrical, and the magnetic areas is in the diameter maximum of the float, and the maximum gauge of the float makes
, when active force of the float not by gas, the float is rested in the flowmeter bodies.
4. suspended body flowmeter according to claim 1, it is characterised in that: used according to the estimated float of use environment
Position is used under state, the Hall element is arranged at the same level height using position.
5. suspended body flowmeter according to claim 1, which is characterized in that the suspended body flowmeter further include:
Gas supply device, with air inlet pipe, exhaust pipe；
Wherein, the air inlet pipe is connected to the air inlet of the flowmeter bodies, and the exhaust pipe is connected to the flowmeter sheet
The exhaust outlet of body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821597162.8U CN209623823U (en) | 2018-09-29 | 2018-09-29 | Suspended body flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821597162.8U CN209623823U (en) | 2018-09-29 | 2018-09-29 | Suspended body flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209623823U true CN209623823U (en) | 2019-11-12 |
Family
ID=68442165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821597162.8U Expired - Fee Related CN209623823U (en) | 2018-09-29 | 2018-09-29 | Suspended body flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209623823U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110967096A (en) * | 2018-09-29 | 2020-04-07 | 北京海慧电讯科技有限公司 | Float flowmeter |
-
2018
- 2018-09-29 CN CN201821597162.8U patent/CN209623823U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110967096A (en) * | 2018-09-29 | 2020-04-07 | 北京海慧电讯科技有限公司 | Float flowmeter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209623823U (en) | Suspended body flowmeter | |
| CN201662254U (en) | Water temperature and level sensor of solar water heater | |
| CN208283230U (en) | It is a kind of for measuring the device of compact rock core air water two-phase relative permeability | |
| CN204241068U (en) | Condenser type Multiple Liquid Level Instrument | |
| CN108195480A (en) | A kind of high-precision temperature detection circuit | |
| CN107436272A (en) | A kind of apparatus and method based on pressure differential method accurate measurement shale air content | |
| CN204373904U (en) | A kind of oxygen inhalation apparatus calibrating installation | |
| CN113295241B (en) | Boiler temperature compensation liquid level measurement system and method | |
| CN212008400U (en) | Integral type sampling calibration constant voltage alkalization measuring device | |
| CN203116779U (en) | Flow meter with airflow state sensing function | |
| CN204944552U (en) | A kind of multi-functional flow sensor | |
| CN203587151U (en) | Ultrasonic open-channel meter | |
| CN207379558U (en) | Four electrodes substitute ground loop intelligent electromagnetic flowmeter | |
| CN110967096A (en) | Float flowmeter | |
| CN208999152U (en) | A kind of device for well water position measurement and water sampling | |
| CN207423280U (en) | Gas flowmeter | |
| CN207197574U (en) | Measuring gas flow rate system based on connecting and disconnecting of the circuit | |
| CN111366621A (en) | Integral type sampling calibration constant voltage alkalization measuring device | |
| CN205561989U (en) | Prevent undulant level gauge | |
| CN204788521U (en) | Bayonet flowmeter | |
| CN105466606B (en) | A kind of ultrasonic calorimeter blank pipe detecting system and method | |
| CN203329148U (en) | Oxygen inhalator | |
| CN109781217A (en) | A kind of detection device for water meter | |
| CN205749366U (en) | Plain type pH meter | |
| CN207590518U (en) | A kind of liquid level detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191112 Termination date: 20200929 |