CN108593015A - Cycloid impeller gyroscope principle Internet of Things water meter movement - Google Patents
Cycloid impeller gyroscope principle Internet of Things water meter movement Download PDFInfo
- Publication number
- CN108593015A CN108593015A CN201810539489.8A CN201810539489A CN108593015A CN 108593015 A CN108593015 A CN 108593015A CN 201810539489 A CN201810539489 A CN 201810539489A CN 108593015 A CN108593015 A CN 108593015A
- Authority
- CN
- China
- Prior art keywords
- impeller
- cycloid
- water meter
- water
- impeller assembly
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/10—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission
- G01F1/115—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission with magnetic or electromagnetic coupling to the indicating device
- G01F1/1155—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission with magnetic or electromagnetic coupling to the indicating device with magnetic coupling only in a mechanical transmission path
Abstract
The present invention relates to water meter field, more particularly to a kind of cycloid impeller gyroscope principle Internet of Things water meter movement；It includes impeller box, filter mantle, water-stop sheet, impeller assembly and pulse induction component, the impeller assembly includes impeller body, upper axis and blade, the blade is cycloidal curved surface, a kind of cycloid impeller gyroscope principle Internet of Things water meter movement blade provided by the invention is cycloidal curved surface, not only increase flow forced area, increase wheel rotation torque indirectly, reduce initial-flow, improve accuracy of water meter, and it is smooth to go out water damping continuous and stable, eliminate water outlet pressure water pulsating nature, improve pressure water efficiency, in addition impeller assembly is designed using gyroscope principle, the vertex of upper axis is less than the nominal diameter D of impeller assembly to the distance between the center of gravity of impeller assembly L, reduce rotary inertia, abolish resonance point, reduce the centrifugal force of high-speed rotation, so that impeller assembly rotation is more stable.
Description
Technical field
The present invention relates to water meter field, more particularly to a kind of cycloid impeller gyroscope principle Internet of Things water meter movement.
Background technology
Social development in recent years is maked rapid progress, and science and technology is constantly progressive, water meter industry combination microelectronics and sensor skill
Art, intellectual water meter make a breakthrough sexual development, and unmanned meter reading, automatic management is done step-by-step, and leakage loss is administered.Intelligent water is predominantly dry
Formula water meter, for dry-type meter due to reasons in structure, impeller stem is longer, causes to rotate so unstable, and water-stop sheet Upper shaft sleeve shrinkage pool is easy
Trapped gas, initial-flow is big, and small flow totator inertia is unstable, and precision R values are not relatively high.In addition, conventional water meter impeller box with every
The damping of water plate is single, and there are pulse water flow dampings, are caused to wheel rotation unstable.
Invention content
It is an object of the invention to overcome disadvantage mentioned above, a kind of cycloid impeller gyroscope principle Internet of Things water meter machine is provided
The blade of core, the movement is cycloidal curved surface, and blade inner concave is hydro-flow thrust stress surface, and blade arcuate surface is pressure water water outlet
Face, cycloidal not only increase flow forced area, increase wheel rotation torque indirectly, reduce initial-flow, improve water meter
Measuring accuracy, and go out smooth water damping continuous and stable, elimination water outlet pressure water pulsating nature, improve pressure water efficiency, this out rotor
Component is designed using gyroscope principle, and the vertex of upper axis is less than impeller assembly to the distance between the center of gravity of impeller assembly L
Nominal diameter D, reduce rotary inertia, abolish resonance point, reduce the centrifugal force of high-speed rotation so that impeller assembly rotate
It is more stable.
The invention is realized in this way：A kind of cycloid impeller gyroscope principle Internet of Things water meter movement, it is characterised in that：Packet
Impeller box with an open mouth is included, the filter mantle that is sheathed on impeller box bottom, water-stop sheet on impeller box in opening is covered on, turns
It moves to be connected to the impeller assembly between impeller box and water-stop sheet and be set on impeller assembly and water-stop sheet and is used to obtain water
The pulse induction component of flow information, the impeller assembly includes impeller body, be fixedly arranged on impeller body upper end upper axis and
Multiple to be along the circumferential direction uniformly arranged in the blade on impeller body, the blade is cycloidal curved surface, the vertex of the upper axis
The distance between center of gravity to impeller assembly is less than the nominal diameter of impeller assembly.
In order to increase damping incision and the duration that fails, eliminates traditional line rib and slowly run (i.e. in impeller assembly
When small flow status) defect pulsed is generated, impeller box bottom inner face is equipped with a plurality of cycloidal and damps rib one, institute
The cycloid direction of rotation for stating cycloidal damping rib one is opposite with the cycloid direction of rotation of blade.
In order to increase damping incision and the duration that fails, eliminate traditional line rib impeller assembly high-speed rotation (i.e.
When big flow state) defect pulsed is generated, the lower face of the water-stop sheet is equipped with a plurality of cycloidal and damps rib two, described
The cycloid direction of rotation that cycloidal damps rib two is opposite with the cycloid direction of rotation of blade.
In order to improve the rotation sensitivity of impeller assembly, the impeller assembly further includes the upper axis being fixedly arranged in water-stop sheet
The Lower shaft sleeve that cover, is fixedly arranged in impeller body lower end, coaxial arrangement in Lower shaft sleeve bearing and be fixedly arranged on impeller box bottom
Under it is top, on the inner ring top pressure of the bearing is top under, the upper axis is rotationally connected in Upper shaft sleeve.
For the flow of preferably metering water meter, the pulse induction component include the magnet steel that is coaxially fixedly arranged on axis with
And multiple Hall sensors being fixedly installed on water-stop sheet and be uniformly arranged along magnet steel surrounding.
Preferably, the water-stop sheet is equipped with the mounting groove that quantity matches with Hall sensor, each Hall sensor
It is mounted in corresponding mounting groove.
Preferably, the Hall sensor is TMR sensor.
In order to be easy to do roll rotational when impeller assembly being made to encounter sandstone foreign matter, card sand, the rear of the blade is avoided to set
There is chamfering.
Preferably, the parametric equation of cycloid is in the cycloidal curved surface：
Wherein r is the radius of circle, the angle that t is passed through by the radius of circle.
For the prior art, the present invention has the following advantages：
(1) cycloid impeller gyroscope principle Internet of Things water meter movement provided by the invention, blade are cycloidal curved surface, blade
Inner concave is hydro-flow thrust stress surface, and blade arcuate surface is that pressure water goes out the water surface, cycloidal not only increase flow forced area,
Connect increase wheel rotation torque, reduce initial-flow, improve accuracy of water meter, and go out water damping continuous and stable it is smooth,
It eliminates water outlet pressure water pulsating nature, improve pressure water efficiency, impeller assembly is designed using gyroscope principle in addition, the top of upper axis
Point is less than the nominal diameter D of impeller assembly to the distance between the center of gravity of impeller assembly L, reduces rotary inertia, abolishes resonance
Point reduces the centrifugal force of high-speed rotation so that impeller assembly rotation is more stable；
(2) cycloid impeller gyroscope principle Internet of Things water meter movement provided by the invention is set on the inner face of impeller box bottom
Have an a plurality of cycloidal damping rib one, cycloidal damp the cycloid direction of rotation of rib one with the cycloid direction of rotation phase of blade
Instead, increase damping incision and the duration that fails, eliminate traditional line rib and slowly run (i.e. small flow status in impeller assembly
When) defect pulsed is generated, when water jet propulsion impeller assembly rotates, one whole process of cycloidal muscle generates impeller assembly continuous
Stablize smooth submissive damping, so that impeller assembly is continued at the uniform velocity stable rotation, provided reliably for hall sensing output pulse signal
Ensure；
(3) cycloid impeller gyroscope principle Internet of Things water meter movement provided by the invention, the lower face of water-stop sheet is equipped with
A plurality of cycloidal damps rib two, cycloidal damp the cycloid direction of rotation of rib two with the cycloid direction of rotation phase of blade
Instead, increase damping incision and the duration that fails, eliminate traditional line rib in impeller assembly high-speed rotation (i.e. big flow state
When) defect pulsed is generated, in water outlet, cycloidal damping rib two can generate micro cyclone, and impeller assembly is prevented to accelerate to rotate,
Except low impeller assembly rotating speed, impeller assembly is made to continue at the uniform velocity stable rotation, keeps water meter error curve flat, improves measuring accuracy,
Fretting wear is reduced, extends water meter and shares the service life, while reliable guarantee is provided for hall sensing output pulse signal；
(4) rear of cycloid impeller gyroscope principle Internet of Things water meter movement provided by the invention, blade is equipped with chamfering, makes
Impeller assembly is easy to do roll rotational when encountering sandstone foreign matter, avoids card sand；
(5) cycloid impeller gyroscope principle Internet of Things water meter movement provided by the invention, reasonable for structure, performance can
It leans on, measuring accuracy is high, and service life is long.
Description of the drawings
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings：
Fig. 1 is the three dimensional structure diagram of cycloid impeller gyroscope principle Internet of Things water meter movement of the present invention；
Fig. 2 is the vertical profile structural schematic diagram of cycloid impeller gyroscope principle Internet of Things water meter movement of the present invention；
Fig. 3 is the three-dimensional explosive view of cycloid impeller gyroscope principle Internet of Things water meter movement of the present invention；
Fig. 4 is the three dimensional structure diagram of impeller box；
Fig. 5 is the three dimensional structure diagram of water-stop sheet；
Fig. 6 is the structural schematic diagram of impeller assembly；
Fig. 7 is the three dimensional structure diagram of impeller assembly.
Symbol description in figure：1, impeller box, 11, cycloidal damp rib one, 2, filter mantle, 3, water-stop sheet, 31, cycloidal
Damp rib two, 32, mounting groove, 4, impeller assembly, 41, impeller body, 42, upper axis, 43, blade, 431, chamfering, 44, upper axis
Set, 45, Lower shaft sleeve, 46, bearing, 47, under top, 5, pulse induction component, 51, magnet steel, 52, Hall sensor, L：Upper axis
Vertex is to the distance between the center of gravity of impeller assembly, D：The nominal diameter of impeller assembly.
Specific implementation mode
The content of present invention is described in detail with specific embodiment with reference to the accompanying drawings of the specification：
It is a kind of cycloid impeller gyroscope principle Internet of Things water meter movement provided by the invention as shown in Fig. 1-Fig. 7, it is special
Sign is：Including impeller box 1 with an open mouth, the filter mantle 2 that is sheathed on 1 bottom of impeller box, it is covered on impeller box 1 and is open
On water-stop sheet 3, the impeller assembly 4 that is rotationally connected between impeller box 1 and water-stop sheet 3 and be set to impeller assembly 4 and every
The pulse induction component 5 for obtaining flow information on water plate 3, the impeller assembly 4 include impeller body 41, are fixedly arranged on
It the upper axis 42 of 41 upper end of impeller body and multiple is along the circumferential direction uniformly arranged in the blade 43 on impeller body 41, the leaf
Piece 43 is cycloidal curved surface, and the vertex of the upper axis 42 is less than impeller assembly 4 to the distance between the center of gravity of impeller assembly 4 L
Nominal diameter D.
As shown in figure 4, in order to increase damping incision and the duration that fails, it is low in impeller assembly to eliminate traditional line rib
Speed rotation when small flow status (i.e.) generates the defect of pulsation, and 1 bottom inner face of the impeller box is equipped with a plurality of cycloid form drag
The cycloid direction of rotation of Buddhist nun's rib 1, the cycloidal damping rib 1 is opposite with the cycloid direction of rotation of blade 43.
As shown in figure 5, in order to increase damping incision and the duration that fails, traditional line rib is eliminated in impeller assembly height
Speed rotation when big flow state (i.e.) generates the defect of pulsation, and the lower face of the water-stop sheet 3 is equipped with the damping of a plurality of cycloidal
The cycloid direction of rotation of rib 2 31, the cycloidal damping rib 2 31 is opposite with the cycloid direction of rotation of blade 43.
As shown in Figure 2,3, in order to improve the rotation sensitivity of impeller assembly, the impeller assembly 4 further include be fixedly arranged on every
Upper shaft sleeve 44 in water plate 3, the Lower shaft sleeve 45 being fixedly arranged in 41 lower end of impeller body, coaxial arrangement are in the bearing in Lower shaft sleeve 45
46 and be fixedly arranged on top 47 under 1 bottom of impeller box, the inner ring top pressure of the bearing 46 top 47 under on, the upper axis 42
It is rotationally connected in Upper shaft sleeve 44.
As shown in figure 3, for the flow of preferably metering water meter, the pulse induction component 5 includes coaxially being fixedly arranged on
Magnet steel 51 on axis 42 and multiple Hall sensors being fixedly installed on water-stop sheet 3 and be uniformly arranged along 51 surrounding of magnet steel
52。
As shown in figure 3, the water-stop sheet 3 is equipped with the mounting groove 32 that quantity matches with Hall sensor 52, each suddenly
You are mounted in corresponding mounting groove 32 sensor 52.
Preferably, the Hall sensor 52 is TMR sensor.
As shown in fig. 7, in order to be easy to do roll rotational when impeller assembly being made to encounter sandstone foreign matter, card sand, the leaf are avoided
The rear of piece 43 is equipped with chamfering 431.
Preferably, the parametric equation of cycloid is in the cycloidal curved surface：
Wherein r is the radius of circle, the angle that t is passed through by the radius of circle.
Above-mentioned specific implementation mode is only explained in detail technical scheme of the present invention, the present invention not only only office
It is limited to above-described embodiment, any improvement or replacement of every principle according to the present invention should all be within protection scope of the present invention.
Claims (9)
1. a kind of cycloid impeller gyroscope principle Internet of Things water meter movement, it is characterised in that：Including impeller box with an open mouth
(1), it is sheathed on the filter mantle (2) of impeller box (1) bottom, is covered on the water-stop sheet (3) on being open on impeller box (1), rotation connects
It the impeller assembly (4) that is connected between impeller box (1) and water-stop sheet (3) and is set on impeller assembly (4) and water-stop sheet (3)
Pulse induction component (5) for obtaining flow information, the impeller assembly (4) include impeller body (41), are fixedly arranged on leaf
Take turns ontology (41) upper end upper axis (42) and it is multiple be along the circumferential direction uniformly arranged in the blade (43) on impeller body (41),
The blade (43) is cycloidal curved surface, and the vertex of the upper axis (42) is small to the distance between the center of gravity of impeller assembly (4) (L)
Nominal diameter (D) in impeller assembly (4).
2. a kind of cycloid impeller gyroscope principle Internet of Things water meter movement according to claim 1, it is characterised in that：It is described
Impeller box (1) bottom inner face is equipped with a plurality of cycloidal damping rib one (11), the cycloidal damping rib one (11)
Cycloid direction of rotation is opposite with the cycloid direction of rotation of blade (43).
3. a kind of cycloid impeller gyroscope principle Internet of Things water meter movement according to claim 1, it is characterised in that：It is described
The lower face of water-stop sheet (3) is equipped with a plurality of cycloidal damping rib two (31), the pendulum of the cycloidal damping rib two (31)
Line direction of rotation is opposite with the cycloid direction of rotation of blade (43).
4. a kind of cycloid impeller gyroscope principle Internet of Things water meter movement according to claim 1, it is characterised in that：It is described
The lower axle that impeller assembly (4) further includes the Upper shaft sleeve (44) being fixedly arranged in water-stop sheet (3), is fixedly arranged in impeller body (41) lower end
Set (45), coaxial arrangement in Lower shaft sleeve (45) bearing (46) and be fixedly arranged under impeller box (1) bottom top (47), institute
It states in the inner ring top pressure top under (47) of bearing (46), the upper axis (42) is rotationally connected in Upper shaft sleeve (44).
5. a kind of cycloid impeller gyroscope principle Internet of Things water meter movement according to claim 4, it is characterised in that：It is described
Pulse induction component (5) includes the magnet steel (51) that is coaxially fixedly arranged on axis (42) and multiple is fixedly installed in water-stop sheet (3)
Hall sensor (52) that is upper and being uniformly arranged along magnet steel (51) surrounding.
6. a kind of cycloid impeller gyroscope principle Internet of Things water meter movement according to claim 5, it is characterised in that：It is described
Water-stop sheet (3) is equipped with the mounting groove (32) that quantity matches with Hall sensor (52), and each Hall sensor (52) is pacified
Loaded in corresponding mounting groove (32).
7. a kind of cycloid impeller gyroscope principle Internet of Things water meter movement according to claim 5, it is characterised in that：It is described
Hall sensor (52) is TMR sensor.
8. a kind of cycloid impeller gyroscope principle Internet of Things water meter movement according to claim 1, it is characterised in that：It is described
The rear of blade (43) is equipped with chamfering (431).
9. a kind of cycloid impeller gyroscope principle Internet of Things water meter movement according to claim 1, it is characterised in that：It is described
The parametric equation of cycloid is in cycloidal curved surface：
Wherein r is the radius of circle, the angle that t is passed through by the radius of circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810539489.8A CN108593015A (en) | 2018-05-30 | 2018-05-30 | Cycloid impeller gyroscope principle Internet of Things water meter movement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810539489.8A CN108593015A (en) | 2018-05-30 | 2018-05-30 | Cycloid impeller gyroscope principle Internet of Things water meter movement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108593015A true CN108593015A (en) | 2018-09-28 |
Family
ID=63630247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810539489.8A Pending CN108593015A (en) | 2018-05-30 | 2018-05-30 | Cycloid impeller gyroscope principle Internet of Things water meter movement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108593015A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB498112A (en) * | 1938-01-27 | 1939-01-03 | Emory Frank Stover | Improvements in gyroscopic fluid flow meters |
| CN1152117A (en) * | 1995-12-12 | 1997-06-18 | 郭建军 | Magnetically-transmitted high-precision 8-digit water meter |
| CN200941056Y (en) * | 2006-08-25 | 2007-08-29 | 宁波水表股份有限公司 | Impeller of watermeter |
| KR101112224B1 (en) * | 2010-12-03 | 2012-02-14 | (주) 원티엘 | A device for measuring flow of a meter and a method the same |
| CN103925238A (en) * | 2014-05-09 | 2014-07-16 | 重庆大学 | Epicycloid centrifugal pump impeller |
| JP5808876B1 (en) * | 2015-05-13 | 2015-11-10 | タカハタプレシジョンジャパン株式会社 | Impeller, water meter using this |
| CN204944553U (en) * | 2015-07-31 | 2016-01-06 | 天津天狮生物发展有限公司 | Separating dry reed pipe impeller type flowmeter |
| CN106150834A (en) * | 2015-04-15 | 2016-11-23 | 颜志服 | Water saving top in shape hydroelectric generator |
| CN107167192A (en) * | 2017-07-06 | 2017-09-15 | 福州金泽科技有限公司 | The more accurate water meter of metering |
| CN107747979A (en) * | 2017-11-21 | 2018-03-02 | 福州金泽科技有限公司 | A kind of anti-sticking foreign body intelligence teletransmission Internet of Things water meter watch core |
| CN208333563U (en) * | 2018-05-30 | 2019-01-04 | 福州金泽科技有限公司 | Cycloid impeller gyroscope principle Internet of Things water meter movement |
-
2018
- 2018-05-30 CN CN201810539489.8A patent/CN108593015A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB498112A (en) * | 1938-01-27 | 1939-01-03 | Emory Frank Stover | Improvements in gyroscopic fluid flow meters |
| CN1152117A (en) * | 1995-12-12 | 1997-06-18 | 郭建军 | Magnetically-transmitted high-precision 8-digit water meter |
| CN200941056Y (en) * | 2006-08-25 | 2007-08-29 | 宁波水表股份有限公司 | Impeller of watermeter |
| KR101112224B1 (en) * | 2010-12-03 | 2012-02-14 | (주) 원티엘 | A device for measuring flow of a meter and a method the same |
| CN103261847A (en) * | 2010-12-03 | 2013-08-21 | 一Tl株式会社 | Apparatus and method of measuring a flow within a meter |
| CN103925238A (en) * | 2014-05-09 | 2014-07-16 | 重庆大学 | Epicycloid centrifugal pump impeller |
| CN106150834A (en) * | 2015-04-15 | 2016-11-23 | 颜志服 | Water saving top in shape hydroelectric generator |
| JP5808876B1 (en) * | 2015-05-13 | 2015-11-10 | タカハタプレシジョンジャパン株式会社 | Impeller, water meter using this |
| CN204944553U (en) * | 2015-07-31 | 2016-01-06 | 天津天狮生物发展有限公司 | Separating dry reed pipe impeller type flowmeter |
| CN107167192A (en) * | 2017-07-06 | 2017-09-15 | 福州金泽科技有限公司 | The more accurate water meter of metering |
| CN107747979A (en) * | 2017-11-21 | 2018-03-02 | 福州金泽科技有限公司 | A kind of anti-sticking foreign body intelligence teletransmission Internet of Things water meter watch core |
| CN208333563U (en) * | 2018-05-30 | 2019-01-04 | 福州金泽科技有限公司 | Cycloid impeller gyroscope principle Internet of Things water meter movement |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208333563U (en) | Cycloid impeller gyroscope principle Internet of Things water meter movement | |
| CN106536921B (en) | To extract wind energy and hydrokinetic turbine rotor | |
| CN104613019B (en) | Centrifugal impeller back guide blade with self-adaptation function | |
| CN106470899A (en) | The elimination torque of propeller type VTOL flying object and compatible device of keeping in balance | |
| CN101918707A (en) | Wind turbine rotor with vertical rotation axis | |
| CN106424035B (en) | A kind of oil-gas pipeline internal detector speed control and implementation method | |
| CN106321634A (en) | Composite air flotation shafting structure | |
| CN108593015A (en) | Cycloid impeller gyroscope principle Internet of Things water meter movement | |
| CN107469169A (en) | A kind of band have dislocation design radial permanent magnet bearing axial blood pump | |
| CN105764791B (en) | Pipe guide | |
| CN102619779B (en) | Turbulence generator for medium-consistency paper pulp pump | |
| CN101852170A (en) | Vertical shaft type air motor blade with turbulator | |
| CN207701455U (en) | Accelerate the centrifugal impeller of centrifugal pump | |
| CN109660057A (en) | A kind of single direction rotation permanent magnet high-speed motor and its two-way air bearing | |
| CN205714934U (en) | A kind of brushless fan bleed type wind wheel | |
| CN201687653U (en) | Vertical axis type air operated machine blade with spoiler | |
| KR101732145B1 (en) | wind power generation apparatus | |
| JP2020137138A (en) | Motor built-in fluid machinery and vertical take-off/landing aircraft | |
| CN104912798B (en) | A kind of swinging blower fan with bent axle | |
| CN205714947U (en) | A kind of air draught type wind wheel of brushless fan | |
| CN108167112A (en) | For the Intelligent EDDY Current generating apparatus on pneumatic equipment bladess surface | |
| CN208123118U (en) | A kind of centrifugal pump unshrouded impeller structure | |
| CN201527281U (en) | Water meter with magnetic suspension structural impeller | |
| RU2341411C1 (en) | Device for inducing lift | |
| CN205209559U (en) | Hall formula flowmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |